git.oblomov.eu Git - linux-2.6/blob - 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/bitmap.h>
  32 #include <linux/usb.h>
  33 #include <linux/i2c.h>
  34 #include <linux/version.h>
  35 #include <linux/video_decoder.h>
  36 #include <linux/mutex.h>
  37
  38 #include "em28xx.h"
  39 #include <media/tuner.h>
  40 #include <media/v4l2-common.h>
  41
  42 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  43                       "Markus Rechberger <mrechberger@gmail.com>, " \
  44                       "Mauro Carvalho Chehab <mchehab@brturbo.com.br>, " \
  45                       "Sascha Sommer <saschasommer@freenet.de>"
  46
  47 #define DRIVER_NAME         "em28xx"
  48 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  49 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  50
  51 #define em28xx_videodbg(fmt, arg...) do {\
  52         if (video_debug) \
  53                 printk(KERN_INFO "%s %s :"fmt, \
  54                          dev->name, __FUNCTION__ , ##arg); } while (0)
  55
  56 MODULE_AUTHOR(DRIVER_AUTHOR);
  57 MODULE_DESCRIPTION(DRIVER_DESC);
  58 MODULE_LICENSE("GPL");
  59
  60 static LIST_HEAD(em28xx_devlist);
  61
  62 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  63 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  64 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  65 module_param_array(card,  int, NULL, 0444);
  66 module_param_array(video_nr, int, NULL, 0444);
  67 module_param_array(vbi_nr, int, NULL, 0444);
  68 MODULE_PARM_DESC(card,"card type");
  69 MODULE_PARM_DESC(video_nr,"video device numbers");
  70 MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
  71
  72 static int tuner = -1;
  73 module_param(tuner, int, 0444);
  74 MODULE_PARM_DESC(tuner, "tuner type");
  75
  76 static unsigned int video_debug = 0;
  77 module_param(video_debug,int,0644);
  78 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  79
  80 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  81 static unsigned long em28xx_devused;
  82
  83 /* supported tv norms */
  84 static struct em28xx_tvnorm tvnorms[] = {
  85         {
  86                 .name = "PAL",
  87                 .id = V4L2_STD_PAL,
  88                 .mode = VIDEO_MODE_PAL,
  89          }, {
  90                 .name = "NTSC",
  91                 .id = V4L2_STD_NTSC,
  92                 .mode = VIDEO_MODE_NTSC,
  93         }, {
  94                  .name = "SECAM",
  95                  .id = V4L2_STD_SECAM,
  96                  .mode = VIDEO_MODE_SECAM,
  97         }, {
  98                 .name = "PAL-M",
  99                 .id = V4L2_STD_PAL_M,
 100                 .mode = VIDEO_MODE_PAL,
 101         }
 102 };
 103
 104 static const unsigned char saa7114_i2c_init[] = {
 105         0x00,0x00,0x01,0x08,0x02,0xc4,0x03,0x30,0x04,0x90,0x05,0x90,0x06,0xeb,0x07,0xe0,
 106         0x08,0x88,0x09,0x40,0x0a,0x80,0x0b,0x44,0x0c,0x40,0x0d,0x00,0x0e,0x81,0x0f,0x2a,
 107         0x10,0x06,0x11,0x00,0x12,0xc8,0x13,0x80,0x14,0x00,0x15,0x11,0x16,0x01,0x17,0x42,
 108         0x18,0x40,0x19,0x80,0x40,0x00,0x41,0xff,0x42,0xff,0x43,0xff,0x44,0xff,0x45,0xff,
 109         0x46,0xff,0x47,0xff,0x48,0xff,0x49,0xff,0x4a,0xff,0x4b,0xff,0x4c,0xff,0x4d,0xff,
 110         0x4e,0xff,0x4f,0xff,0x50,0xff,0x51,0xff,0x52,0xff,0x53,0xff,0x54,0x5f,0x55,0xff,
 111         0x56,0xff,0x57,0xff,0x58,0x00,0x59,0x47,0x5a,0x03,0x5b,0x03,0x5d,0x3e,0x5e,0x00,
 112         0x80,0x1c,0x83,0x01,0x84,0xa5,0x85,0x10,0x86,0x45,0x87,0x41,0x88,0xf0,0x88,0x00,
 113         0x88,0xf0,0x90,0x00,0x91,0x08,0x92,0x00,0x93,0x80,0x94,0x08,0x95,0x00,0x96,0xc0,
 114         0x97,0x02,0x98,0x13,0x99,0x00,0x9a,0x38,0x9b,0x01,0x9c,0x80,0x9d,0x02,0x9e,0x06,
 115         0x9f,0x01,0xa0,0x01,0xa1,0x00,0xa2,0x00,0xa4,0x80,0xa5,0x36,0xa6,0x36,0xa8,0x67,
 116         0xa9,0x04,0xaa,0x00,0xac,0x33,0xad,0x02,0xae,0x00,0xb0,0xcd,0xb1,0x04,0xb2,0xcd,
 117         0xb3,0x04,0xb4,0x01,0xb8,0x00,0xb9,0x00,0xba,0x00,0xbb,0x00,0xbc,0x00,0xbd,0x00,
 118         0xbe,0x00,0xbf,0x00
 119 };
 120
 121 #define TVNORMS ARRAY_SIZE(tvnorms)
 122
 123 /* supported controls */
 124 /* Common to all boards */
 125 static struct v4l2_queryctrl em28xx_qctrl[] = {
 126         {
 127                 .id = V4L2_CID_AUDIO_VOLUME,
 128                 .type = V4L2_CTRL_TYPE_INTEGER,
 129                 .name = "Volume",
 130                 .minimum = 0x0,
 131                 .maximum = 0x1f,
 132                 .step = 0x1,
 133                 .default_value = 0x1f,
 134                 .flags = 0,
 135         },{
 136                 .id = V4L2_CID_AUDIO_MUTE,
 137                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 138                 .name = "Mute",
 139                 .minimum = 0,
 140                 .maximum = 1,
 141                 .step = 1,
 142                 .default_value = 1,
 143                 .flags = 0,
 144         }
 145 };
 146
 147 /* FIXME: These are specific to saa711x - should be moved to its code */
 148 static struct v4l2_queryctrl saa711x_qctrl[] = {
 149         {
 150                 .id = V4L2_CID_BRIGHTNESS,
 151                 .type = V4L2_CTRL_TYPE_INTEGER,
 152                 .name = "Brightness",
 153                 .minimum = -128,
 154                 .maximum = 127,
 155                 .step = 1,
 156                 .default_value = 0,
 157                 .flags = 0,
 158         },{
 159                 .id = V4L2_CID_CONTRAST,
 160                 .type = V4L2_CTRL_TYPE_INTEGER,
 161                 .name = "Contrast",
 162                 .minimum = 0x0,
 163                 .maximum = 0x1f,
 164                 .step = 0x1,
 165                 .default_value = 0x10,
 166                 .flags = 0,
 167         },{
 168                 .id = V4L2_CID_SATURATION,
 169                 .type = V4L2_CTRL_TYPE_INTEGER,
 170                 .name = "Saturation",
 171                 .minimum = 0x0,
 172                 .maximum = 0x1f,
 173                 .step = 0x1,
 174                 .default_value = 0x10,
 175                 .flags = 0,
 176         },{
 177                 .id = V4L2_CID_RED_BALANCE,
 178                 .type = V4L2_CTRL_TYPE_INTEGER,
 179                 .name = "Red chroma balance",
 180                 .minimum = -128,
 181                 .maximum = 127,
 182                 .step = 1,
 183                 .default_value = 0,
 184                 .flags = 0,
 185         },{
 186                 .id = V4L2_CID_BLUE_BALANCE,
 187                 .type = V4L2_CTRL_TYPE_INTEGER,
 188                 .name = "Blue chroma balance",
 189                 .minimum = -128,
 190                 .maximum = 127,
 191                 .step = 1,
 192                 .default_value = 0,
 193                 .flags = 0,
 194         },{
 195                 .id = V4L2_CID_GAMMA,
 196                 .type = V4L2_CTRL_TYPE_INTEGER,
 197                 .name = "Gamma",
 198                 .minimum = 0x0,
 199                 .maximum = 0x3f,
 200                 .step = 0x1,
 201                 .default_value = 0x20,
 202                 .flags = 0,
 203         }
 204 };
 205
 206 static struct usb_driver em28xx_usb_driver;
 207
 208 static DEFINE_MUTEX(em28xx_sysfs_lock);
 209 static DECLARE_RWSEM(em28xx_disconnect);
 210
 211 /*********************  v4l2 interface  ******************************************/
 212
 213 /*
 214  * em28xx_config()
 215  * inits registers with sane defaults
 216  */
 217 static int em28xx_config(struct em28xx *dev)
 218 {
 219
 220         /* Sets I2C speed to 100 KHz */
 221         em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 222
 223         /* enable vbi capturing */
 224
 225         em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1);
 226         em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1);
 227         em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
 228
 229         em28xx_audio_usb_mute(dev, 1);
 230         dev->mute = 1;          /* maybe not the right place... */
 231         dev->volume = 0x1f;
 232         em28xx_audio_analog_set(dev);
 233         em28xx_audio_analog_setup(dev);
 234         em28xx_outfmt_set_yuv422(dev);
 235         em28xx_colorlevels_set_default(dev);
 236         em28xx_compression_disable(dev);
 237
 238         return 0;
 239 }
 240
 241 /*
 242  * em28xx_config_i2c()
 243  * configure i2c attached devices
 244  */
 245 static void em28xx_config_i2c(struct em28xx *dev)
 246 {
 247         struct v4l2_frequency f;
 248         struct video_decoder_init em28xx_vdi = {.data = NULL };
 249
 250
 251         /* configure decoder */
 252         if(dev->model == EM2820_BOARD_MSI_VOX_USB_2){
 253                 em28xx_vdi.data=saa7114_i2c_init;
 254                 em28xx_vdi.len=sizeof(saa7114_i2c_init);
 255         }
 256
 257
 258         em28xx_i2c_call_clients(dev, DECODER_INIT, &em28xx_vdi);
 259         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
 260 /*      em28xx_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
 261 /*      em28xx_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
 262 /*      em28xx_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
 263 /*      em28xx_i2c_call_clients(dev,DECODER_DUMP, NULL); */
 264
 265         /* configure tuner */
 266         f.tuner = 0;
 267         f.type = V4L2_TUNER_ANALOG_TV;
 268         f.frequency = 9076;     /* FIXME:remove magic number */
 269         dev->ctl_freq = f.frequency;
 270         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 271
 272         /* configure tda9887 */
 273
 274
 275 /*      em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
 276 }
 277
 278 /*
 279  * em28xx_empty_framequeues()
 280  * prepare queues for incoming and outgoing frames
 281  */
 282 static void em28xx_empty_framequeues(struct em28xx *dev)
 283 {
 284         u32 i;
 285
 286         INIT_LIST_HEAD(&dev->inqueue);
 287         INIT_LIST_HEAD(&dev->outqueue);
 288
 289         for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
 290                 dev->frame[i].state = F_UNUSED;
 291                 dev->frame[i].buf.bytesused = 0;
 292         }
 293 }
 294
 295 static void video_mux(struct em28xx *dev, int index)
 296 {
 297         int input, ainput;
 298
 299         input = INPUT(index)->vmux;
 300         dev->ctl_input = index;
 301         dev->ctl_ainput = INPUT(index)->amux;
 302
 303         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
 304
 305
 306         em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
 307
 308         if (dev->has_msp34xx) {
 309                 if (dev->i2s_speed)
 310                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 311                 em28xx_i2c_call_clients(dev, VIDIOC_S_AUDIO, &dev->ctl_ainput);
 312                 ainput = EM28XX_AUDIO_SRC_TUNER;
 313                 em28xx_audio_source(dev, ainput);
 314         } else {
 315                 switch (dev->ctl_ainput) {
 316                 case 0:
 317                         ainput = EM28XX_AUDIO_SRC_TUNER;
 318                         break;
 319                 default:
 320                         ainput = EM28XX_AUDIO_SRC_LINE;
 321                 }
 322                 em28xx_audio_source(dev, ainput);
 323         }
 324 }
 325
 326 /*
 327  * em28xx_v4l2_open()
 328  * inits the device and starts isoc transfer
 329  */
 330 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 331 {
 332         int minor = iminor(inode);
 333         int errCode = 0;
 334         struct em28xx *h,*dev = NULL;
 335         struct list_head *list;
 336
 337         list_for_each(list,&em28xx_devlist) {
 338                 h = list_entry(list, struct em28xx, devlist);
 339                 if (h->vdev->minor == minor) {
 340                         dev  = h;
 341                         dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 342                 }
 343                 if (h->vbi_dev->minor == minor) {
 344                         dev  = h;
 345                         dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
 346                 }
 347         }
 348         if (NULL == dev)
 349                 return -ENODEV;
 350
 351         filp->private_data=dev;
 352
 353         em28xx_videodbg("open minor=%d type=%s users=%d\n",
 354                                 minor,v4l2_type_names[dev->type],dev->users);
 355
 356         if (!down_read_trylock(&em28xx_disconnect))
 357                 return -ERESTARTSYS;
 358
 359         if (dev->users) {
 360                 em28xx_warn("this driver can be opened only once\n");
 361                 up_read(&em28xx_disconnect);
 362                 return -EBUSY;
 363         }
 364
 365         init_MUTEX(&dev->fileop_lock);  /* to 1 == available */
 366         spin_lock_init(&dev->queue_lock);
 367         init_waitqueue_head(&dev->wait_frame);
 368         init_waitqueue_head(&dev->wait_stream);
 369
 370         down(&dev->lock);
 371
 372         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 373                 em28xx_set_alternate(dev);
 374
 375                 dev->width = norm_maxw(dev);
 376                 dev->height = norm_maxh(dev);
 377                 dev->frame_size = dev->width * dev->height * 2;
 378                 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 379                 dev->bytesperline = dev->width * 2;
 380                 dev->hscale = 0;
 381                 dev->vscale = 0;
 382
 383                 em28xx_capture_start(dev, 1);
 384                 em28xx_resolution_set(dev);
 385
 386                 /* start the transfer */
 387                 errCode = em28xx_init_isoc(dev);
 388                 if (errCode)
 389                         goto err;
 390
 391                 video_mux(dev, 0);
 392         }
 393
 394         dev->users++;
 395         filp->private_data = dev;
 396         dev->io = IO_NONE;
 397         dev->stream = STREAM_OFF;
 398         dev->num_frames = 0;
 399
 400         /* prepare queues */
 401         em28xx_empty_framequeues(dev);
 402
 403         dev->state |= DEV_INITIALIZED;
 404
 405       err:
 406         up(&dev->lock);
 407         up_read(&em28xx_disconnect);
 408         return errCode;
 409 }
 410
 411 /*
 412  * em28xx_realease_resources()
 413  * unregisters the v4l2,i2c and usb devices
 414  * called when the device gets disconected or at module unload
 415 */
 416 static void em28xx_release_resources(struct em28xx *dev)
 417 {
 418         mutex_lock(&em28xx_sysfs_lock);
 419
 420         /*FIXME: I2C IR should be disconnected */
 421
 422         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
 423                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
 424                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
 425         list_del(&dev->devlist);
 426         video_unregister_device(dev->vdev);
 427         video_unregister_device(dev->vbi_dev);
 428         em28xx_i2c_unregister(dev);
 429         usb_put_dev(dev->udev);
 430         mutex_unlock(&em28xx_sysfs_lock);
 431
 432
 433         /* Mark device as unused */
 434         em28xx_devused&=~(1<<dev->devno);
 435 }
 436
 437 /*
 438  * em28xx_v4l2_close()
 439  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 440  */
 441 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 442 {
 443         int errCode;
 444         struct em28xx *dev=filp->private_data;
 445
 446         em28xx_videodbg("users=%d\n", dev->users);
 447
 448         down(&dev->lock);
 449
 450         em28xx_uninit_isoc(dev);
 451
 452         em28xx_release_buffers(dev);
 453
 454         /* the device is already disconnect, free the remaining resources */
 455         if (dev->state & DEV_DISCONNECTED) {
 456                 em28xx_release_resources(dev);
 457                 up(&dev->lock);
 458                 kfree(dev);
 459                 return 0;
 460         }
 461
 462         /* set alternate 0 */
 463         dev->alt = 0;
 464         em28xx_videodbg("setting alternate 0\n");
 465         errCode = usb_set_interface(dev->udev, 0, 0);
 466         if (errCode < 0) {
 467                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 468                      errCode);
 469         }
 470
 471         dev->users--;
 472         wake_up_interruptible_nr(&dev->open, 1);
 473         up(&dev->lock);
 474         return 0;
 475 }
 476
 477 /*
 478  * em28xx_v4l2_read()
 479  * will allocate buffers when called for the first time
 480  */
 481 static ssize_t
 482 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 483                  loff_t * f_pos)
 484 {
 485         struct em28xx_frame_t *f, *i;
 486         unsigned long lock_flags;
 487         int ret = 0;
 488         struct em28xx *dev = filp->private_data;
 489
 490         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 491                 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
 492         }
 493         if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 494                 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
 495                 em28xx_videodbg("not supported yet! ...\n");
 496                 if (copy_to_user(buf, "", 1)) {
 497                         up(&dev->fileop_lock);
 498                         return -EFAULT;
 499                 }
 500                 return (1);
 501         }
 502         if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 503                 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
 504                 em28xx_videodbg("not supported yet! ...\n");
 505                 if (copy_to_user(buf, "", 1)) {
 506                         up(&dev->fileop_lock);
 507                         return -EFAULT;
 508                 }
 509                 return (1);
 510         }
 511
 512         if (down_interruptible(&dev->fileop_lock))
 513                 return -ERESTARTSYS;
 514
 515         if (dev->state & DEV_DISCONNECTED) {
 516                 em28xx_videodbg("device not present\n");
 517                 up(&dev->fileop_lock);
 518                 return -ENODEV;
 519         }
 520
 521         if (dev->state & DEV_MISCONFIGURED) {
 522                 em28xx_videodbg("device misconfigured; close and open it again\n");
 523                 up(&dev->fileop_lock);
 524                 return -EIO;
 525         }
 526
 527         if (dev->io == IO_MMAP) {
 528                 em28xx_videodbg ("IO method is set to mmap; close and open"
 529                                 " the device again to choose the read method\n");
 530                 up(&dev->fileop_lock);
 531                 return -EINVAL;
 532         }
 533
 534         if (dev->io == IO_NONE) {
 535                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 536                         em28xx_errdev("read failed, not enough memory\n");
 537                         up(&dev->fileop_lock);
 538                         return -ENOMEM;
 539                 }
 540                 dev->io = IO_READ;
 541                 dev->stream = STREAM_ON;
 542                 em28xx_queue_unusedframes(dev);
 543         }
 544
 545         if (!count) {
 546                 up(&dev->fileop_lock);
 547                 return 0;
 548         }
 549
 550         if (list_empty(&dev->outqueue)) {
 551                 if (filp->f_flags & O_NONBLOCK) {
 552                         up(&dev->fileop_lock);
 553                         return -EAGAIN;
 554                 }
 555                 ret = wait_event_interruptible
 556                     (dev->wait_frame,
 557                      (!list_empty(&dev->outqueue)) ||
 558                      (dev->state & DEV_DISCONNECTED));
 559                 if (ret) {
 560                         up(&dev->fileop_lock);
 561                         return ret;
 562                 }
 563                 if (dev->state & DEV_DISCONNECTED) {
 564                         up(&dev->fileop_lock);
 565                         return -ENODEV;
 566                 }
 567         }
 568
 569         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 570
 571         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 572         list_for_each_entry(i, &dev->outqueue, frame)
 573             i->state = F_UNUSED;
 574         INIT_LIST_HEAD(&dev->outqueue);
 575         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 576
 577         em28xx_queue_unusedframes(dev);
 578
 579         if (count > f->buf.length)
 580                 count = f->buf.length;
 581
 582         if (copy_to_user(buf, f->bufmem, count)) {
 583                 up(&dev->fileop_lock);
 584                 return -EFAULT;
 585         }
 586         *f_pos += count;
 587
 588         up(&dev->fileop_lock);
 589
 590         return count;
 591 }
 592
 593 /*
 594  * em28xx_v4l2_poll()
 595  * will allocate buffers when called for the first time
 596  */
 597 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 598 {
 599         unsigned int mask = 0;
 600         struct em28xx *dev = filp->private_data;
 601
 602         if (down_interruptible(&dev->fileop_lock))
 603                 return POLLERR;
 604
 605         if (dev->state & DEV_DISCONNECTED) {
 606                 em28xx_videodbg("device not present\n");
 607         } else if (dev->state & DEV_MISCONFIGURED) {
 608                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 609         } else {
 610                 if (dev->io == IO_NONE) {
 611                         if (!em28xx_request_buffers
 612                             (dev, EM28XX_NUM_READ_FRAMES)) {
 613                                 em28xx_warn
 614                                     ("poll() failed, not enough memory\n");
 615                         } else {
 616                                 dev->io = IO_READ;
 617                                 dev->stream = STREAM_ON;
 618                         }
 619                 }
 620
 621                 if (dev->io == IO_READ) {
 622                         em28xx_queue_unusedframes(dev);
 623                         poll_wait(filp, &dev->wait_frame, wait);
 624
 625                         if (!list_empty(&dev->outqueue))
 626                                 mask |= POLLIN | POLLRDNORM;
 627
 628                         up(&dev->fileop_lock);
 629
 630                         return mask;
 631                 }
 632         }
 633
 634         up(&dev->fileop_lock);
 635         return POLLERR;
 636 }
 637
 638 /*
 639  * em28xx_vm_open()
 640  */
 641 static void em28xx_vm_open(struct vm_area_struct *vma)
 642 {
 643         struct em28xx_frame_t *f = vma->vm_private_data;
 644         f->vma_use_count++;
 645 }
 646
 647 /*
 648  * em28xx_vm_close()
 649  */
 650 static void em28xx_vm_close(struct vm_area_struct *vma)
 651 {
 652         /* NOTE: buffers are not freed here */
 653         struct em28xx_frame_t *f = vma->vm_private_data;
 654         f->vma_use_count--;
 655 }
 656
 657 static struct vm_operations_struct em28xx_vm_ops = {
 658         .open = em28xx_vm_open,
 659         .close = em28xx_vm_close,
 660 };
 661
 662 /*
 663  * em28xx_v4l2_mmap()
 664  */
 665 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 666 {
 667         unsigned long size = vma->vm_end - vma->vm_start,
 668             start = vma->vm_start;
 669         void *pos;
 670         u32 i;
 671
 672         struct em28xx *dev = filp->private_data;
 673
 674         if (down_interruptible(&dev->fileop_lock))
 675                 return -ERESTARTSYS;
 676
 677         if (dev->state & DEV_DISCONNECTED) {
 678                 em28xx_videodbg("mmap: device not present\n");
 679                 up(&dev->fileop_lock);
 680                 return -ENODEV;
 681         }
 682
 683         if (dev->state & DEV_MISCONFIGURED) {
 684                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 685                                                 "open it again\n");
 686                 up(&dev->fileop_lock);
 687                 return -EIO;
 688         }
 689
 690         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 691             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 692                 up(&dev->fileop_lock);
 693                 return -EINVAL;
 694         }
 695
 696         for (i = 0; i < dev->num_frames; i++) {
 697                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 698                         break;
 699         }
 700         if (i == dev->num_frames) {
 701                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 702                 up(&dev->fileop_lock);
 703                 return -EINVAL;
 704         }
 705
 706         /* VM_IO is eventually going to replace PageReserved altogether */
 707         vma->vm_flags |= VM_IO;
 708         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 709
 710         pos = dev->frame[i].bufmem;
 711         while (size > 0) {      /* size is page-aligned */
 712                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 713                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 714                         up(&dev->fileop_lock);
 715                         return -EAGAIN;
 716                 }
 717                 start += PAGE_SIZE;
 718                 pos += PAGE_SIZE;
 719                 size -= PAGE_SIZE;
 720         }
 721
 722         vma->vm_ops = &em28xx_vm_ops;
 723         vma->vm_private_data = &dev->frame[i];
 724
 725         em28xx_vm_open(vma);
 726         up(&dev->fileop_lock);
 727         return 0;
 728 }
 729
 730 /*
 731  * em28xx_get_ctrl()
 732  * return the current saturation, brightness or contrast, mute state
 733  */
 734 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 735 {
 736         switch (ctrl->id) {
 737         case V4L2_CID_AUDIO_MUTE:
 738                 ctrl->value = dev->mute;
 739                 return 0;
 740         case V4L2_CID_AUDIO_VOLUME:
 741                 ctrl->value = dev->volume;
 742                 return 0;
 743         default:
 744                 return -EINVAL;
 745         }
 746 }
 747
 748 /*FIXME: should be moved to saa711x */
 749 static int saa711x_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 750 {
 751         s32 tmp;
 752         switch (ctrl->id) {
 753         case V4L2_CID_BRIGHTNESS:
 754                 if ((tmp = em28xx_brightness_get(dev)) < 0)
 755                         return -EIO;
 756                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 757                 return 0;
 758         case V4L2_CID_CONTRAST:
 759                 if ((ctrl->value = em28xx_contrast_get(dev)) < 0)
 760                         return -EIO;
 761                 return 0;
 762         case V4L2_CID_SATURATION:
 763                 if ((ctrl->value = em28xx_saturation_get(dev)) < 0)
 764                         return -EIO;
 765                 return 0;
 766         case V4L2_CID_RED_BALANCE:
 767                 if ((tmp = em28xx_v_balance_get(dev)) < 0)
 768                         return -EIO;
 769                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 770                 return 0;
 771         case V4L2_CID_BLUE_BALANCE:
 772                 if ((tmp = em28xx_u_balance_get(dev)) < 0)
 773                         return -EIO;
 774                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 775                 return 0;
 776         case V4L2_CID_GAMMA:
 777                 if ((ctrl->value = em28xx_gamma_get(dev)) < 0)
 778                         return -EIO;
 779                 return 0;
 780         default:
 781                 return -EINVAL;
 782         }
 783 }
 784
 785 /*
 786  * em28xx_set_ctrl()
 787  * mute or set new saturation, brightness or contrast
 788  */
 789 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 790 {
 791         switch (ctrl->id) {
 792         case V4L2_CID_AUDIO_MUTE:
 793                 if (ctrl->value != dev->mute) {
 794                         dev->mute = ctrl->value;
 795                         em28xx_audio_usb_mute(dev, ctrl->value);
 796                         return em28xx_audio_analog_set(dev);
 797                 }
 798                 return 0;
 799         case V4L2_CID_AUDIO_VOLUME:
 800                 dev->volume = ctrl->value;
 801                 return em28xx_audio_analog_set(dev);
 802         default:
 803                 return -EINVAL;
 804         }
 805 }
 806
 807 /*FIXME: should be moved to saa711x */
 808 static int saa711x_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 809 {
 810         switch (ctrl->id) {
 811         case V4L2_CID_BRIGHTNESS:
 812                 return em28xx_brightness_set(dev, ctrl->value);
 813         case V4L2_CID_CONTRAST:
 814                 return em28xx_contrast_set(dev, ctrl->value);
 815         case V4L2_CID_SATURATION:
 816                 return em28xx_saturation_set(dev, ctrl->value);
 817         case V4L2_CID_RED_BALANCE:
 818                 return em28xx_v_balance_set(dev, ctrl->value);
 819         case V4L2_CID_BLUE_BALANCE:
 820                 return em28xx_u_balance_set(dev, ctrl->value);
 821         case V4L2_CID_GAMMA:
 822                 return em28xx_gamma_set(dev, ctrl->value);
 823         default:
 824                 return -EINVAL;
 825         }
 826 }
 827
 828 /*
 829  * em28xx_stream_interrupt()
 830  * stops streaming
 831  */
 832 static int em28xx_stream_interrupt(struct em28xx *dev)
 833 {
 834         int ret = 0;
 835
 836         /* stop reading from the device */
 837
 838         dev->stream = STREAM_INTERRUPT;
 839         ret = wait_event_timeout(dev->wait_stream,
 840                                  (dev->stream == STREAM_OFF) ||
 841                                  (dev->state & DEV_DISCONNECTED),
 842                                  EM28XX_URB_TIMEOUT);
 843         if (dev->state & DEV_DISCONNECTED)
 844                 return -ENODEV;
 845         else if (ret) {
 846                 dev->state |= DEV_MISCONFIGURED;
 847                 em28xx_videodbg("device is misconfigured; close and "
 848                         "open /dev/video%d again\n",
 849                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
 850                 return ret;
 851         }
 852
 853         return 0;
 854 }
 855
 856 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 857 {
 858         unsigned int hscale, vscale;
 859         unsigned int maxh, maxw;
 860
 861         maxw = norm_maxw(dev);
 862         maxh = norm_maxh(dev);
 863
 864         /* width must even because of the YUYV format */
 865         /* height must be even because of interlacing */
 866         height &= 0xfffe;
 867         width &= 0xfffe;
 868
 869         if (height < 32)
 870                 height = 32;
 871         if (height > maxh)
 872                 height = maxh;
 873         if (width < 48)
 874                 width = 48;
 875         if (width > maxw)
 876                 width = maxw;
 877
 878         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 879                 hscale = 0x3fff;
 880         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 881
 882         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 883                 vscale = 0x3fff;
 884         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 885
 886         /* set new image size */
 887         dev->width = width;
 888         dev->height = height;
 889         dev->frame_size = dev->width * dev->height * 2;
 890         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 891         dev->bytesperline = dev->width * 2;
 892         dev->hscale = hscale;
 893         dev->vscale = vscale;
 894
 895         em28xx_resolution_set(dev);
 896
 897         return 0;
 898 }
 899
 900
 901 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
 902 {
 903         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
 904                 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
 905                 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 906                 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
 907                 "V4L2_BUF_TYPE_VBI_CAPTURE" :
 908                 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
 909                 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
 910                 "not supported");
 911
 912         if (format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 913                 format->fmt.pix.width = dev->width;
 914                 format->fmt.pix.height = dev->height;
 915                 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 916                 format->fmt.pix.bytesperline = dev->bytesperline;
 917                 format->fmt.pix.sizeimage = dev->frame_size;
 918                 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 919                 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 920
 921                 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
 922                         dev->height);
 923                 return 0;
 924         }
 925
 926         return -EINVAL;
 927 }
 928
 929
 930 /*
 931  * em28xx_v4l2_do_ioctl()
 932  * This function is _not_ called directly, but from
 933  * em28xx_v4l2_ioctl. Userspace
 934  * copying is done already, arg is a kernel pointer.
 935  */
 936 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 937                            struct em28xx *dev, unsigned int cmd, void *arg,
 938                            v4l2_kioctl driver_ioctl)
 939 {
 940         int ret;
 941
 942         switch (cmd) {
 943                 /* ---------- tv norms ---------- */
 944         case VIDIOC_ENUMSTD:
 945                 {
 946                         struct v4l2_standard *e = arg;
 947                         unsigned int i;
 948
 949                         i = e->index;
 950                         if (i >= TVNORMS)
 951                                 return -EINVAL;
 952                         ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 953                                                        tvnorms[e->index].name);
 954                         e->index = i;
 955                         if (ret < 0)
 956                                 return ret;
 957                         return 0;
 958                 }
 959         case VIDIOC_G_STD:
 960                 {
 961                         v4l2_std_id *id = arg;
 962
 963                         *id = dev->tvnorm->id;
 964                         return 0;
 965                 }
 966         case VIDIOC_S_STD:
 967                 {
 968                         v4l2_std_id *id = arg;
 969                         unsigned int i;
 970
 971                         for (i = 0; i < TVNORMS; i++)
 972                                 if (*id == tvnorms[i].id)
 973                                         break;
 974                         if (i == TVNORMS)
 975                                 for (i = 0; i < TVNORMS; i++)
 976                                         if (*id & tvnorms[i].id)
 977                                                 break;
 978                         if (i == TVNORMS)
 979                                 return -EINVAL;
 980
 981                         down(&dev->lock);
 982                         dev->tvnorm = &tvnorms[i];
 983
 984                         em28xx_set_norm(dev, dev->width, dev->height);
 985
 986 /*
 987                 dev->width=norm_maxw(dev);
 988                 dev->height=norm_maxh(dev);
 989                 dev->frame_size=dev->width*dev->height*2;
 990                 dev->field_size=dev->frame_size>>1;
 991                 dev->bytesperline=dev->width*2;
 992                 dev->hscale=0;
 993                 dev->vscale=0;
 994
 995                 em28xx_resolution_set(dev);
 996 */
 997 /*
 998                 em28xx_uninit_isoc(dev);
 999                 em28xx_set_alternate(dev);
1000                 em28xx_capture_start(dev, 1);
1001                 em28xx_resolution_set(dev);
1002                 em28xx_init_isoc(dev);
1003 */
1004                         em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
1005                                                 &tvnorms[i].mode);
1006                         em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
1007                                                 &dev->tvnorm->id);
1008
1009                         up(&dev->lock);
1010
1011                         return 0;
1012                 }
1013
1014                 /* ------ input switching ---------- */
1015         case VIDIOC_ENUMINPUT:
1016                 {
1017                         struct v4l2_input *i = arg;
1018                         unsigned int n;
1019                         static const char *iname[] = {
1020                                 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1021                                 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1022                                 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1023                                 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1024                                 [EM28XX_VMUX_SVIDEO] = "S-Video",
1025                                 [EM28XX_VMUX_TELEVISION] = "Television",
1026                                 [EM28XX_VMUX_CABLE] = "Cable TV",
1027                                 [EM28XX_VMUX_DVB] = "DVB",
1028                                 [EM28XX_VMUX_DEBUG] = "for debug only",
1029                         };
1030
1031                         n = i->index;
1032                         if (n >= MAX_EM28XX_INPUT)
1033                                 return -EINVAL;
1034                         if (0 == INPUT(n)->type)
1035                                 return -EINVAL;
1036                         memset(i, 0, sizeof(*i));
1037                         i->index = n;
1038                         i->type = V4L2_INPUT_TYPE_CAMERA;
1039                         strcpy(i->name, iname[INPUT(n)->type]);
1040                         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1041                             (EM28XX_VMUX_CABLE == INPUT(n)->type))
1042                                 i->type = V4L2_INPUT_TYPE_TUNER;
1043                         for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1044                                 i->std |= tvnorms[n].id;
1045                         return 0;
1046                 }
1047
1048         case VIDIOC_G_INPUT:
1049                 {
1050                         int *i = arg;
1051                         *i = dev->ctl_input;
1052
1053                         return 0;
1054                 }
1055
1056         case VIDIOC_S_INPUT:
1057                 {
1058                         int *index = arg;
1059
1060                         if (*index >= MAX_EM28XX_INPUT)
1061                                 return -EINVAL;
1062                         if (0 == INPUT(*index)->type)
1063                                 return -EINVAL;
1064
1065                         down(&dev->lock);
1066                         video_mux(dev, *index);
1067                         up(&dev->lock);
1068
1069                         return 0;
1070                 }
1071
1072         case VIDIOC_G_AUDIO:
1073                 {
1074                         struct v4l2_audio *a = arg;
1075                         unsigned int index = a->index;
1076
1077                         if (a->index > 1)
1078                                 return -EINVAL;
1079                         memset(a, 0, sizeof(*a));
1080                         index = dev->ctl_ainput;
1081
1082                         if (index == 0) {
1083                                 strcpy(a->name, "Television");
1084                         } else {
1085                                 strcpy(a->name, "Line In");
1086                         }
1087                         a->capability = V4L2_AUDCAP_STEREO;
1088                         a->index = index;
1089                         return 0;
1090                 }
1091
1092         case VIDIOC_S_AUDIO:
1093                 {
1094                         struct v4l2_audio *a = arg;
1095                         if (a->index != dev->ctl_ainput)
1096                                 return -EINVAL;
1097
1098                         return 0;
1099                 }
1100
1101                 /* --- controls ---------------------------------------------- */
1102         case VIDIOC_QUERYCTRL:
1103                 {
1104                         struct v4l2_queryctrl *qc = arg;
1105                         int i, id=qc->id;
1106
1107                         memset(qc,0,sizeof(*qc));
1108                         qc->id=id;
1109
1110                         if (!dev->has_msp34xx) {
1111                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1112                                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1113                                                 memcpy(qc, &(em28xx_qctrl[i]),
1114                                                 sizeof(*qc));
1115                                                 return 0;
1116                                         }
1117                                 }
1118                         }
1119                         if (dev->decoder == EM28XX_TVP5150) {
1120                                 em28xx_i2c_call_clients(dev,cmd,qc);
1121                                 if (qc->type)
1122                                         return 0;
1123                                 else
1124                                         return -EINVAL;
1125                         }
1126                         for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1127                                 if (qc->id && qc->id == saa711x_qctrl[i].id) {
1128                                         memcpy(qc, &(saa711x_qctrl[i]),
1129                                                sizeof(*qc));
1130                                         return 0;
1131                                 }
1132                         }
1133
1134                         return -EINVAL;
1135                 }
1136
1137         case VIDIOC_G_CTRL:
1138                 {
1139                         struct v4l2_control *ctrl = arg;
1140                         int retval=-EINVAL;
1141
1142                         if (!dev->has_msp34xx)
1143                                 retval=em28xx_get_ctrl(dev, ctrl);
1144                         if (retval==-EINVAL) {
1145                                 if (dev->decoder == EM28XX_TVP5150) {
1146                                         em28xx_i2c_call_clients(dev,cmd,arg);
1147                                         return 0;
1148                                 }
1149
1150                                 return saa711x_get_ctrl(dev, ctrl);
1151                         } else return retval;
1152                 }
1153
1154         case VIDIOC_S_CTRL:
1155                 {
1156                         struct v4l2_control *ctrl = arg;
1157                         u8 i;
1158
1159                         if (!dev->has_msp34xx){
1160                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1161                                         if (ctrl->id == em28xx_qctrl[i].id) {
1162                                                 if (ctrl->value <
1163                                                 em28xx_qctrl[i].minimum
1164                                                 || ctrl->value >
1165                                                 em28xx_qctrl[i].maximum)
1166                                                         return -ERANGE;
1167                                                 return em28xx_set_ctrl(dev, ctrl);
1168                                         }
1169                                 }
1170                         }
1171
1172                         if (dev->decoder == EM28XX_TVP5150) {
1173                                 em28xx_i2c_call_clients(dev,cmd,arg);
1174                                 return 0;
1175                         } else if (!dev->has_msp34xx) {
1176                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1177                                         if (ctrl->id == em28xx_qctrl[i].id) {
1178                                                 if (ctrl->value <
1179                                                 em28xx_qctrl[i].minimum
1180                                                 || ctrl->value >
1181                                                 em28xx_qctrl[i].maximum)
1182                                                         return -ERANGE;
1183                                                 return em28xx_set_ctrl(dev, ctrl);
1184                                         }
1185                                 }
1186                                 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1187                                         if (ctrl->id == saa711x_qctrl[i].id) {
1188                                                 if (ctrl->value <
1189                                                 saa711x_qctrl[i].minimum
1190                                                 || ctrl->value >
1191                                                 saa711x_qctrl[i].maximum)
1192                                                         return -ERANGE;
1193                                                 return saa711x_set_ctrl(dev, ctrl);
1194                                         }
1195                                 }
1196                         }
1197
1198                         return -EINVAL;
1199                 }
1200
1201                 /* --- tuner ioctls ------------------------------------------ */
1202         case VIDIOC_G_TUNER:
1203                 {
1204                         struct v4l2_tuner *t = arg;
1205                         int status = 0;
1206
1207                         if (0 != t->index)
1208                                 return -EINVAL;
1209
1210                         memset(t, 0, sizeof(*t));
1211                         strcpy(t->name, "Tuner");
1212                         t->type = V4L2_TUNER_ANALOG_TV;
1213                         t->capability = V4L2_TUNER_CAP_NORM;
1214                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1215 /*              t->signal = 0xffff;*/
1216 /*              em28xx_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1217                         /* No way to get signal strength? */
1218                         down(&dev->lock);
1219                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1220                                                 &status);
1221                         up(&dev->lock);
1222                         t->signal =
1223                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1224
1225                         em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1226                                  t->afc);
1227                         return 0;
1228                 }
1229         case VIDIOC_S_TUNER:
1230                 {
1231                         struct v4l2_tuner *t = arg;
1232                         int status = 0;
1233
1234                         if (0 != t->index)
1235                                 return -EINVAL;
1236                         memset(t, 0, sizeof(*t));
1237                         strcpy(t->name, "Tuner");
1238                         t->type = V4L2_TUNER_ANALOG_TV;
1239                         t->capability = V4L2_TUNER_CAP_NORM;
1240                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1241 /*              t->signal = 0xffff; */
1242                         /* No way to get signal strength? */
1243                         down(&dev->lock);
1244                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1245                                                 &status);
1246                         up(&dev->lock);
1247                         t->signal =
1248                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1249
1250                         em28xx_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1251                                  t->signal, t->afc);
1252                         return 0;
1253                 }
1254         case VIDIOC_G_FREQUENCY:
1255                 {
1256                         struct v4l2_frequency *f = arg;
1257
1258                         memset(f, 0, sizeof(*f));
1259                         f->type = V4L2_TUNER_ANALOG_TV;
1260                         f->frequency = dev->ctl_freq;
1261
1262                         return 0;
1263                 }
1264         case VIDIOC_S_FREQUENCY:
1265                 {
1266                         struct v4l2_frequency *f = arg;
1267
1268                         if (0 != f->tuner)
1269                                 return -EINVAL;
1270
1271                         if (V4L2_TUNER_ANALOG_TV != f->type)
1272                                 return -EINVAL;
1273
1274                         down(&dev->lock);
1275                         dev->ctl_freq = f->frequency;
1276                         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1277                         up(&dev->lock);
1278                         return 0;
1279                 }
1280
1281         case VIDIOC_CROPCAP:
1282                 {
1283                         struct v4l2_cropcap *cc = arg;
1284
1285                         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1286                                 return -EINVAL;
1287                         cc->bounds.left = 0;
1288                         cc->bounds.top = 0;
1289                         cc->bounds.width = dev->width;
1290                         cc->bounds.height = dev->height;
1291                         cc->defrect = cc->bounds;
1292                         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1293                         cc->pixelaspect.denominator = 59;
1294                         return 0;
1295                 }
1296         case VIDIOC_STREAMON:
1297                 {
1298                         int *type = arg;
1299
1300                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1301                             || dev->io != IO_MMAP)
1302                                 return -EINVAL;
1303
1304                         if (list_empty(&dev->inqueue))
1305                                 return -EINVAL;
1306
1307                         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1308
1309                         em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1310
1311                         return 0;
1312                 }
1313         case VIDIOC_STREAMOFF:
1314                 {
1315                         int *type = arg;
1316                         int ret;
1317
1318                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1319                             || dev->io != IO_MMAP)
1320                                 return -EINVAL;
1321
1322                         if (dev->stream == STREAM_ON) {
1323                                 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1324                                 if ((ret = em28xx_stream_interrupt(dev)))
1325                                         return ret;
1326                         }
1327                         em28xx_empty_framequeues(dev);
1328
1329                         return 0;
1330                 }
1331         default:
1332                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1333                                                   driver_ioctl);
1334         }
1335         return 0;
1336 }
1337
1338 /*
1339  * em28xx_v4l2_do_ioctl()
1340  * This function is _not_ called directly, but from
1341  * em28xx_v4l2_ioctl. Userspace
1342  * copying is done already, arg is a kernel pointer.
1343  */
1344 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1345                                  unsigned int cmd, void *arg)
1346 {
1347         struct em28xx *dev = filp->private_data;
1348
1349         if (!dev)
1350                 return -ENODEV;
1351
1352         if (video_debug > 1)
1353                 v4l_print_ioctl(dev->name,cmd);
1354
1355         switch (cmd) {
1356
1357                 /* --- capabilities ------------------------------------------ */
1358         case VIDIOC_QUERYCAP:
1359                 {
1360                         struct v4l2_capability *cap = arg;
1361
1362                         memset(cap, 0, sizeof(*cap));
1363                         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1364                         strlcpy(cap->card, em28xx_boards[dev->model].name,
1365                                 sizeof(cap->card));
1366                         strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1367                                 sizeof(cap->bus_info));
1368                         cap->version = EM28XX_VERSION_CODE;
1369                         cap->capabilities =
1370                             V4L2_CAP_SLICED_VBI_CAPTURE |
1371                             V4L2_CAP_VIDEO_CAPTURE |
1372                             V4L2_CAP_AUDIO |
1373                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1374                         if (dev->has_tuner)
1375                                 cap->capabilities |= V4L2_CAP_TUNER;
1376                         return 0;
1377                 }
1378
1379                 /* --- capture ioctls ---------------------------------------- */
1380         case VIDIOC_ENUM_FMT:
1381                 {
1382                         struct v4l2_fmtdesc *fmtd = arg;
1383
1384                         if (fmtd->index != 0)
1385                                 return -EINVAL;
1386                         memset(fmtd, 0, sizeof(*fmtd));
1387                         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1388                         strcpy(fmtd->description, "Packed YUY2");
1389                         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1390                         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1391                         return 0;
1392                 }
1393
1394         case VIDIOC_G_FMT:
1395                 return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1396
1397         case VIDIOC_TRY_FMT:
1398         case VIDIOC_S_FMT:
1399                 {
1400                         struct v4l2_format *format = arg;
1401                         u32 i;
1402                         int ret = 0;
1403                         int width = format->fmt.pix.width;
1404                         int height = format->fmt.pix.height;
1405                         unsigned int hscale, vscale;
1406                         unsigned int maxh, maxw;
1407
1408                         maxw = norm_maxw(dev);
1409                         maxh = norm_maxh(dev);
1410
1411 /*              int both_fields; */
1412
1413                         em28xx_videodbg("%s: type=%s\n",
1414                                  cmd ==
1415                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1416                                  "VIDIOC_S_FMT",
1417                                  format->type ==
1418                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1419                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1420                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1421                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1422                                  "not supported");
1423
1424                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1425                                 return -EINVAL;
1426
1427                         em28xx_videodbg("%s: requested %dx%d\n",
1428                                  cmd ==
1429                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1430                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1431                                  format->fmt.pix.height);
1432
1433                         /* FIXME: Move some code away from here */
1434                         /* width must even because of the YUYV format */
1435                         /* height must be even because of interlacing */
1436                         height &= 0xfffe;
1437                         width &= 0xfffe;
1438
1439                         if (height < 32)
1440                                 height = 32;
1441                         if (height > maxh)
1442                                 height = maxh;
1443                         if (width < 48)
1444                                 width = 48;
1445                         if (width > maxw)
1446                                 width = maxw;
1447
1448                         if(dev->is_em2800){
1449                                 /* the em2800 can only scale down to 50% */
1450                                 if(height % (maxh / 2))
1451                                         height=maxh;
1452                                 if(width % (maxw / 2))
1453                                         width=maxw;
1454                                 /* according to empiatech support */
1455                                 /* the MaxPacketSize is to small to support */
1456                                 /* framesizes larger than 640x480 @ 30 fps */
1457                                 /* or 640x576 @ 25 fps. As this would cut */
1458                                 /* of a part of the image we prefer */
1459                                 /* 360x576 or 360x480 for now */
1460                                 if(width == maxw && height == maxh)
1461                                         width /= 2;
1462                         }
1463
1464                         if ((hscale =
1465                              (((unsigned long)maxw) << 12) / width - 4096L) >=
1466                             0x4000)
1467                                 hscale = 0x3fff;
1468                         width =
1469                             (((unsigned long)maxw) << 12) / (hscale + 4096L);
1470
1471                         if ((vscale =
1472                              (((unsigned long)maxh) << 12) / height - 4096L) >=
1473                             0x4000)
1474                                 vscale = 0x3fff;
1475                         height =
1476                             (((unsigned long)maxh) << 12) / (vscale + 4096L);
1477
1478                         format->fmt.pix.width = width;
1479                         format->fmt.pix.height = height;
1480                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1481                         format->fmt.pix.bytesperline = width * 2;
1482                         format->fmt.pix.sizeimage = width * 2 * height;
1483                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1484                         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1485
1486                         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
1487                                  cmd ==
1488                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1489                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1490                                  format->fmt.pix.height, hscale, vscale);
1491
1492                         if (cmd == VIDIOC_TRY_FMT)
1493                                 return 0;
1494
1495                         for (i = 0; i < dev->num_frames; i++)
1496                                 if (dev->frame[i].vma_use_count) {
1497                                         em28xx_videodbg("VIDIOC_S_FMT failed. "
1498                                                 "Unmap the buffers first.\n");
1499                                         return -EINVAL;
1500                                 }
1501
1502                         /* stop io in case it is already in progress */
1503                         if (dev->stream == STREAM_ON) {
1504                                 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
1505                                 if ((ret = em28xx_stream_interrupt(dev)))
1506                                         return ret;
1507                         }
1508
1509                         em28xx_release_buffers(dev);
1510                         dev->io = IO_NONE;
1511
1512                         /* set new image size */
1513                         dev->width = width;
1514                         dev->height = height;
1515                         dev->frame_size = dev->width * dev->height * 2;
1516                         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1517                         dev->bytesperline = dev->width * 2;
1518                         dev->hscale = hscale;
1519                         dev->vscale = vscale;
1520 /*                      dev->both_fileds = both_fileds; */
1521                         em28xx_uninit_isoc(dev);
1522                         em28xx_set_alternate(dev);
1523                         em28xx_capture_start(dev, 1);
1524                         em28xx_resolution_set(dev);
1525                         em28xx_init_isoc(dev);
1526
1527                         return 0;
1528                 }
1529
1530                 /* --- streaming capture ------------------------------------- */
1531         case VIDIOC_REQBUFS:
1532                 {
1533                         struct v4l2_requestbuffers *rb = arg;
1534                         u32 i;
1535                         int ret;
1536
1537                         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1538                             rb->memory != V4L2_MEMORY_MMAP)
1539                                 return -EINVAL;
1540
1541                         if (dev->io == IO_READ) {
1542                                 em28xx_videodbg ("method is set to read;"
1543                                         " close and open the device again to"
1544                                         " choose the mmap I/O method\n");
1545                                 return -EINVAL;
1546                         }
1547
1548                         for (i = 0; i < dev->num_frames; i++)
1549                                 if (dev->frame[i].vma_use_count) {
1550                                         em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1551                                         return -EINVAL;
1552                                 }
1553
1554                         if (dev->stream == STREAM_ON) {
1555                                 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1556                                 if ((ret = em28xx_stream_interrupt(dev)))
1557                                         return ret;
1558                         }
1559
1560                         em28xx_empty_framequeues(dev);
1561
1562                         em28xx_release_buffers(dev);
1563                         if (rb->count)
1564                                 rb->count =
1565                                     em28xx_request_buffers(dev, rb->count);
1566
1567                         dev->frame_current = NULL;
1568
1569                         em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1570                                                      rb->count);
1571                         dev->io = rb->count ? IO_MMAP : IO_NONE;
1572                         return 0;
1573                 }
1574
1575         case VIDIOC_QUERYBUF:
1576                 {
1577                         struct v4l2_buffer *b = arg;
1578
1579                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1580                             b->index >= dev->num_frames || dev->io != IO_MMAP)
1581                                 return -EINVAL;
1582
1583                         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1584
1585                         if (dev->frame[b->index].vma_use_count) {
1586                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1587                         }
1588                         if (dev->frame[b->index].state == F_DONE)
1589                                 b->flags |= V4L2_BUF_FLAG_DONE;
1590                         else if (dev->frame[b->index].state != F_UNUSED)
1591                                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1592                         return 0;
1593                 }
1594         case VIDIOC_QBUF:
1595                 {
1596                         struct v4l2_buffer *b = arg;
1597                         unsigned long lock_flags;
1598
1599                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1600                             b->index >= dev->num_frames || dev->io != IO_MMAP) {
1601                                 return -EINVAL;
1602                         }
1603
1604                         if (dev->frame[b->index].state != F_UNUSED) {
1605                                 return -EAGAIN;
1606                         }
1607                         dev->frame[b->index].state = F_QUEUED;
1608
1609                         /* add frame to fifo */
1610                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1611                         list_add_tail(&dev->frame[b->index].frame,
1612                                       &dev->inqueue);
1613                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1614
1615                         return 0;
1616                 }
1617         case VIDIOC_DQBUF:
1618                 {
1619                         struct v4l2_buffer *b = arg;
1620                         struct em28xx_frame_t *f;
1621                         unsigned long lock_flags;
1622                         int ret = 0;
1623
1624                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1625                             || dev->io != IO_MMAP)
1626                                 return -EINVAL;
1627
1628                         if (list_empty(&dev->outqueue)) {
1629                                 if (dev->stream == STREAM_OFF)
1630                                         return -EINVAL;
1631                                 if (filp->f_flags & O_NONBLOCK)
1632                                         return -EAGAIN;
1633                                 ret = wait_event_interruptible
1634                                     (dev->wait_frame,
1635                                      (!list_empty(&dev->outqueue)) ||
1636                                      (dev->state & DEV_DISCONNECTED));
1637                                 if (ret)
1638                                         return ret;
1639                                 if (dev->state & DEV_DISCONNECTED)
1640                                         return -ENODEV;
1641                         }
1642
1643                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1644                         f = list_entry(dev->outqueue.next,
1645                                        struct em28xx_frame_t, frame);
1646                         list_del(dev->outqueue.next);
1647                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1648
1649                         f->state = F_UNUSED;
1650                         memcpy(b, &f->buf, sizeof(*b));
1651
1652                         if (f->vma_use_count)
1653                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1654
1655                         return 0;
1656                 }
1657         default:
1658                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1659                                        em28xx_video_do_ioctl);
1660         }
1661         return 0;
1662 }
1663
1664 /*
1665  * em28xx_v4l2_ioctl()
1666  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1667  */
1668 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1669                              unsigned int cmd, unsigned long arg)
1670 {
1671         int ret = 0;
1672         struct em28xx *dev = filp->private_data;
1673
1674         if (down_interruptible(&dev->fileop_lock))
1675                 return -ERESTARTSYS;
1676
1677         if (dev->state & DEV_DISCONNECTED) {
1678                 em28xx_errdev("v4l2 ioctl: device not present\n");
1679                 up(&dev->fileop_lock);
1680                 return -ENODEV;
1681         }
1682
1683         if (dev->state & DEV_MISCONFIGURED) {
1684                 em28xx_errdev
1685                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1686                 up(&dev->fileop_lock);
1687                 return -EIO;
1688         }
1689
1690         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1691
1692         up(&dev->fileop_lock);
1693
1694         return ret;
1695 }
1696
1697 static struct file_operations em28xx_v4l_fops = {
1698         .owner = THIS_MODULE,
1699         .open = em28xx_v4l2_open,
1700         .release = em28xx_v4l2_close,
1701         .ioctl = em28xx_v4l2_ioctl,
1702         .read = em28xx_v4l2_read,
1703         .poll = em28xx_v4l2_poll,
1704         .mmap = em28xx_v4l2_mmap,
1705         .llseek = no_llseek,
1706         .compat_ioctl   = v4l_compat_ioctl32,
1707
1708 };
1709
1710 /******************************** usb interface *****************************************/
1711
1712 /*
1713  * em28xx_init_dev()
1714  * allocates and inits the device structs, registers i2c bus and v4l device
1715  */
1716 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1717                            int minor, int model)
1718 {
1719         struct em28xx *dev = *devhandle;
1720         int retval = -ENOMEM;
1721         int errCode, i;
1722         unsigned int maxh, maxw;
1723
1724         dev->udev = udev;
1725         dev->model = model;
1726         init_MUTEX(&dev->lock);
1727         init_waitqueue_head(&dev->open);
1728
1729         dev->em28xx_write_regs = em28xx_write_regs;
1730         dev->em28xx_read_reg = em28xx_read_reg;
1731         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1732         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1733         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1734         dev->is_em2800 = em28xx_boards[model].is_em2800;
1735         dev->has_tuner = em28xx_boards[model].has_tuner;
1736         dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1737         dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1738         dev->decoder = em28xx_boards[model].decoder;
1739
1740         if (tuner >= 0)
1741                 dev->tuner_type = tuner;
1742         else
1743                 dev->tuner_type = em28xx_boards[model].tuner_type;
1744
1745         dev->video_inputs = em28xx_boards[model].vchannels;
1746
1747         for (i = 0; i < TVNORMS; i++)
1748                 if (em28xx_boards[model].norm == tvnorms[i].mode)
1749                         break;
1750         if (i == TVNORMS)
1751                 i = 0;
1752
1753         dev->tvnorm = &tvnorms[i];      /* set default norm */
1754
1755         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1756
1757         maxw = norm_maxw(dev);
1758         maxh = norm_maxh(dev);
1759
1760         /* set default image size */
1761         dev->width = maxw;
1762         dev->height = maxh;
1763         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1764         dev->field_size = dev->width * dev->height;
1765         dev->frame_size =
1766             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1767         dev->bytesperline = dev->width * 2;
1768         dev->hscale = 0;
1769         dev->vscale = 0;
1770         dev->ctl_input = 2;
1771
1772         /* setup video picture settings for saa7113h */
1773         memset(&dev->vpic, 0, sizeof(dev->vpic));
1774         dev->vpic.colour = 128 << 8;
1775         dev->vpic.hue = 128 << 8;
1776         dev->vpic.brightness = 128 << 8;
1777         dev->vpic.contrast = 192 << 8;
1778         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1779         dev->vpic.depth = 16;
1780         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1781
1782 #ifdef CONFIG_MODULES
1783         /* request some modules */
1784         if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1785                 request_module("saa711x");
1786         if (dev->decoder == EM28XX_TVP5150)
1787                 request_module("tvp5150");
1788         if (dev->has_tuner)
1789                 request_module("tuner");
1790         if (dev->tda9887_conf)
1791                 request_module("tda9887");
1792 #endif
1793         errCode = em28xx_config(dev);
1794         if (errCode) {
1795                 em28xx_errdev("error configuring device\n");
1796                 kfree(dev);
1797                 em28xx_devused&=~(1<<dev->devno);
1798                 return -ENOMEM;
1799         }
1800
1801         down(&dev->lock);
1802         /* register i2c bus */
1803         em28xx_i2c_register(dev);
1804
1805         /* Do board specific init and eeprom reading */
1806         em28xx_card_setup(dev);
1807
1808         /* configure the device */
1809         em28xx_config_i2c(dev);
1810
1811         up(&dev->lock);
1812
1813         errCode = em28xx_config(dev);
1814
1815 #ifdef CONFIG_MODULES
1816         if (dev->has_msp34xx)
1817                 request_module("msp3400");
1818 #endif
1819         /* allocate and fill v4l2 device struct */
1820         dev->vdev = video_device_alloc();
1821         if (NULL == dev->vdev) {
1822                 em28xx_errdev("cannot allocate video_device.\n");
1823                 kfree(dev);
1824                 em28xx_devused&=~(1<<dev->devno);
1825                 return -ENOMEM;
1826         }
1827
1828         dev->vbi_dev = video_device_alloc();
1829         if (NULL == dev->vbi_dev) {
1830                 em28xx_errdev("cannot allocate video_device.\n");
1831                 kfree(dev->vdev);
1832                 kfree(dev);
1833                 em28xx_devused&=~(1<<dev->devno);
1834                 return -ENOMEM;
1835         }
1836
1837         /* Fills VBI device info */
1838         dev->vbi_dev->type = VFL_TYPE_VBI;
1839         dev->vbi_dev->hardware = 0;
1840         dev->vbi_dev->fops = &em28xx_v4l_fops;
1841         dev->vbi_dev->minor = -1;
1842         dev->vbi_dev->dev = &dev->udev->dev;
1843         dev->vbi_dev->release = video_device_release;
1844         snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1845                                                          "em28xx",dev->devno,"vbi");
1846
1847         /* Fills CAPTURE device info */
1848         dev->vdev->type = VID_TYPE_CAPTURE;
1849         if (dev->has_tuner)
1850                 dev->vdev->type |= VID_TYPE_TUNER;
1851         dev->vdev->hardware = 0;
1852         dev->vdev->fops = &em28xx_v4l_fops;
1853         dev->vdev->minor = -1;
1854         dev->vdev->dev = &dev->udev->dev;
1855         dev->vdev->release = video_device_release;
1856         snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1857                                                          "em28xx",dev->devno,"video");
1858
1859         list_add_tail(&dev->devlist,&em28xx_devlist);
1860
1861         /* register v4l2 device */
1862         down(&dev->lock);
1863         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1864                                          video_nr[dev->devno]))) {
1865                 em28xx_errdev("unable to register video device (error=%i).\n",
1866                               retval);
1867                 up(&dev->lock);
1868                 list_del(&dev->devlist);
1869                 video_device_release(dev->vdev);
1870                 kfree(dev);
1871                 em28xx_devused&=~(1<<dev->devno);
1872                 return -ENODEV;
1873         }
1874
1875         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1876                                         vbi_nr[dev->devno]) < 0) {
1877                 printk("unable to register vbi device\n");
1878                 up(&dev->lock);
1879                 list_del(&dev->devlist);
1880                 video_device_release(dev->vbi_dev);
1881                 video_device_release(dev->vdev);
1882                 kfree(dev);
1883                 em28xx_devused&=~(1<<dev->devno);
1884                 return -ENODEV;
1885         } else {
1886                 printk("registered VBI\n");
1887         }
1888
1889         if (dev->has_msp34xx) {
1890                 /* Send a reset to other chips via gpio */
1891                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1892                 udelay(2500);
1893                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1894                 udelay(2500);
1895
1896         }
1897         video_mux(dev, 0);
1898
1899         up(&dev->lock);
1900
1901         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1902                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1903                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1904
1905         return 0;
1906 }
1907
1908 /*
1909  * em28xx_usb_probe()
1910  * checks for supported devices
1911  */
1912 static int em28xx_usb_probe(struct usb_interface *interface,
1913                             const struct usb_device_id *id)
1914 {
1915         const struct usb_endpoint_descriptor *endpoint;
1916         struct usb_device *udev;
1917         struct usb_interface *uif;
1918         struct em28xx *dev = NULL;
1919         int retval = -ENODEV;
1920         int model,i,nr,ifnum;
1921
1922         udev = usb_get_dev(interface_to_usbdev(interface));
1923         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1924
1925         /* Check to see next free device and mark as used */
1926         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1927         em28xx_devused|=1<<nr;
1928
1929         /* Don't register audio interfaces */
1930         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1931                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1932                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1933                                 ifnum,
1934                                 interface->altsetting[0].desc.bInterfaceClass);
1935
1936                 em28xx_devused&=~(1<<nr);
1937                 return -ENODEV;
1938         }
1939
1940         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1941                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1942                         ifnum,
1943                         interface->altsetting[0].desc.bInterfaceClass);
1944
1945         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1946
1947         /* check if the the device has the iso in endpoint at the correct place */
1948         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1949             USB_ENDPOINT_XFER_ISOC) {
1950                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1951                 em28xx_devused&=~(1<<nr);
1952                 return -ENODEV;
1953         }
1954         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1955                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1956                 em28xx_devused&=~(1<<nr);
1957                 return -ENODEV;
1958         }
1959
1960         model=id->driver_info;
1961
1962         if (nr > EM28XX_MAXBOARDS) {
1963                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1964                 em28xx_devused&=~(1<<nr);
1965                 return -ENOMEM;
1966         }
1967
1968         /* allocate memory for our device state and initialize it */
1969         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1970         if (dev == NULL) {
1971                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1972                 em28xx_devused&=~(1<<nr);
1973                 return -ENOMEM;
1974         }
1975
1976         snprintf(dev->name, 29, "em28xx #%d", nr);
1977         dev->devno=nr;
1978
1979         /* compute alternate max packet sizes */
1980         uif = udev->actconfig->interface[0];
1981
1982         dev->num_alt=uif->num_altsetting;
1983         em28xx_info("Alternate settings: %i\n",dev->num_alt);
1984 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1985         dev->alt_max_pkt_size = kmalloc(32*
1986                                                 dev->num_alt,GFP_KERNEL);
1987         if (dev->alt_max_pkt_size == NULL) {
1988                 em28xx_errdev("out of memory!\n");
1989                 em28xx_devused&=~(1<<nr);
1990                 return -ENOMEM;
1991         }
1992
1993         for (i = 0; i < dev->num_alt ; i++) {
1994                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1995                                                         wMaxPacketSize);
1996                 dev->alt_max_pkt_size[i] =
1997                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1998                 em28xx_info("Alternate setting %i, max size= %i\n",i,
1999                                                         dev->alt_max_pkt_size[i]);
2000         }
2001
2002         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2003                 model=card[nr];
2004
2005         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
2006                 em28xx_errdev( "Your board has no eeprom inside it and thus can't\n"
2007                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
2008                         "%s: workaround that.  Redirect complaints to the vendor of\n"
2009                         "%s: the TV card. Generic type will be used."
2010                         "%s: Best regards,\n"
2011                         "%s:         -- tux\n",
2012                         dev->name,dev->name,dev->name,dev->name,dev->name);
2013                 em28xx_errdev("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
2014                         dev->name);
2015                 for (i = 0; i < em28xx_bcount; i++) {
2016                         em28xx_errdev("    card=%d -> %s\n", i,
2017                                                         em28xx_boards[i].name);
2018                 }
2019         }
2020
2021         /* allocate device struct */
2022         retval = em28xx_init_dev(&dev, udev, nr, model);
2023         if (retval)
2024                 return retval;
2025
2026         em28xx_info("Found %s\n", em28xx_boards[model].name);
2027
2028         /* save our data pointer in this interface device */
2029         usb_set_intfdata(interface, dev);
2030         return 0;
2031 }
2032
2033 /*
2034  * em28xx_usb_disconnect()
2035  * called when the device gets diconencted
2036  * video device will be unregistered on v4l2_close in case it is still open
2037  */
2038 static void em28xx_usb_disconnect(struct usb_interface *interface)
2039 {
2040         struct em28xx *dev = usb_get_intfdata(interface);
2041         usb_set_intfdata(interface, NULL);
2042
2043         if (!dev)
2044                 return;
2045
2046         down_write(&em28xx_disconnect);
2047
2048         down(&dev->lock);
2049
2050         em28xx_info("disconnecting %s\n", dev->vdev->name);
2051
2052         wake_up_interruptible_all(&dev->open);
2053
2054         if (dev->users) {
2055                 em28xx_warn
2056                     ("device /dev/video%d is open! Deregistration and memory "
2057                      "deallocation are deferred on close.\n",
2058                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2059
2060                 dev->state |= DEV_MISCONFIGURED;
2061                 em28xx_uninit_isoc(dev);
2062                 dev->state |= DEV_DISCONNECTED;
2063                 wake_up_interruptible(&dev->wait_frame);
2064                 wake_up_interruptible(&dev->wait_stream);
2065         } else {
2066                 dev->state |= DEV_DISCONNECTED;
2067                 em28xx_release_resources(dev);
2068         }
2069
2070         up(&dev->lock);
2071
2072         if (!dev->users) {
2073                 kfree(dev->alt_max_pkt_size);
2074                 kfree(dev);
2075         }
2076
2077         up_write(&em28xx_disconnect);
2078 }
2079
2080 static struct usb_driver em28xx_usb_driver = {
2081         .name = "em28xx",
2082         .probe = em28xx_usb_probe,
2083         .disconnect = em28xx_usb_disconnect,
2084         .id_table = em28xx_id_table,
2085 };
2086
2087 static int __init em28xx_module_init(void)
2088 {
2089         int result;
2090
2091         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2092                (EM28XX_VERSION_CODE >> 16) & 0xff,
2093                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2094 #ifdef SNAPSHOT
2095         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2096                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2097 #endif
2098
2099         /* register this driver with the USB subsystem */
2100         result = usb_register(&em28xx_usb_driver);
2101         if (result)
2102                 em28xx_err(DRIVER_NAME
2103                            " usb_register failed. Error number %d.\n", result);
2104
2105         return result;
2106 }
2107
2108 static void __exit em28xx_module_exit(void)
2109 {
2110         /* deregister this driver with the USB subsystem */
2111         usb_deregister(&em28xx_usb_driver);
2112 }
2113
2114 module_init(em28xx_module_init);
2115 module_exit(em28xx_module_exit);