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); audio register */
 226 /*      em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
 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         mutex_init(&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         mutex_lock(&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                 /* device needs to be initialized before isoc transfer */
 387                 video_mux(dev, 0);
 388
 389                 /* start the transfer */
 390                 errCode = em28xx_init_isoc(dev);
 391                 if (errCode)
 392                         goto err;
 393
 394         }
 395
 396         dev->users++;
 397         filp->private_data = dev;
 398         dev->io = IO_NONE;
 399         dev->stream = STREAM_OFF;
 400         dev->num_frames = 0;
 401
 402         /* prepare queues */
 403         em28xx_empty_framequeues(dev);
 404
 405         dev->state |= DEV_INITIALIZED;
 406
 407 err:
 408         mutex_unlock(&dev->lock);
 409         up_read(&em28xx_disconnect);
 410         return errCode;
 411 }
 412
 413 /*
 414  * em28xx_realease_resources()
 415  * unregisters the v4l2,i2c and usb devices
 416  * called when the device gets disconected or at module unload
 417 */
 418 static void em28xx_release_resources(struct em28xx *dev)
 419 {
 420         mutex_lock(&em28xx_sysfs_lock);
 421
 422         /*FIXME: I2C IR should be disconnected */
 423
 424         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
 425                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
 426                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
 427         list_del(&dev->devlist);
 428         video_unregister_device(dev->vdev);
 429         video_unregister_device(dev->vbi_dev);
 430         em28xx_i2c_unregister(dev);
 431         usb_put_dev(dev->udev);
 432         mutex_unlock(&em28xx_sysfs_lock);
 433
 434
 435         /* Mark device as unused */
 436         em28xx_devused&=~(1<<dev->devno);
 437 }
 438
 439 /*
 440  * em28xx_v4l2_close()
 441  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 442  */
 443 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 444 {
 445         int errCode;
 446         struct em28xx *dev=filp->private_data;
 447
 448         em28xx_videodbg("users=%d\n", dev->users);
 449
 450         mutex_lock(&dev->lock);
 451
 452         em28xx_uninit_isoc(dev);
 453
 454         em28xx_release_buffers(dev);
 455
 456         /* the device is already disconnect, free the remaining resources */
 457         if (dev->state & DEV_DISCONNECTED) {
 458                 em28xx_release_resources(dev);
 459                 mutex_unlock(&dev->lock);
 460                 kfree(dev);
 461                 return 0;
 462         }
 463
 464         /* set alternate 0 */
 465         dev->alt = 0;
 466         em28xx_videodbg("setting alternate 0\n");
 467         errCode = usb_set_interface(dev->udev, 0, 0);
 468         if (errCode < 0) {
 469                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 470                      errCode);
 471         }
 472
 473         dev->users--;
 474         wake_up_interruptible_nr(&dev->open, 1);
 475         mutex_unlock(&dev->lock);
 476         return 0;
 477 }
 478
 479 /*
 480  * em28xx_v4l2_read()
 481  * will allocate buffers when called for the first time
 482  */
 483 static ssize_t
 484 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 485                  loff_t * f_pos)
 486 {
 487         struct em28xx_frame_t *f, *i;
 488         unsigned long lock_flags;
 489         int ret = 0;
 490         struct em28xx *dev = filp->private_data;
 491
 492         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 493                 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
 494         }
 495         if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 496                 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
 497                 em28xx_videodbg("not supported yet! ...\n");
 498                 if (copy_to_user(buf, "", 1)) {
 499                         mutex_unlock(&dev->fileop_lock);
 500                         return -EFAULT;
 501                 }
 502                 return (1);
 503         }
 504         if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 505                 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
 506                 em28xx_videodbg("not supported yet! ...\n");
 507                 if (copy_to_user(buf, "", 1)) {
 508                         mutex_unlock(&dev->fileop_lock);
 509                         return -EFAULT;
 510                 }
 511                 return (1);
 512         }
 513
 514         if (mutex_lock_interruptible(&dev->fileop_lock))
 515                 return -ERESTARTSYS;
 516
 517         if (dev->state & DEV_DISCONNECTED) {
 518                 em28xx_videodbg("device not present\n");
 519                 mutex_unlock(&dev->fileop_lock);
 520                 return -ENODEV;
 521         }
 522
 523         if (dev->state & DEV_MISCONFIGURED) {
 524                 em28xx_videodbg("device misconfigured; close and open it again\n");
 525                 mutex_unlock(&dev->fileop_lock);
 526                 return -EIO;
 527         }
 528
 529         if (dev->io == IO_MMAP) {
 530                 em28xx_videodbg ("IO method is set to mmap; close and open"
 531                                 " the device again to choose the read method\n");
 532                 mutex_unlock(&dev->fileop_lock);
 533                 return -EINVAL;
 534         }
 535
 536         if (dev->io == IO_NONE) {
 537                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 538                         em28xx_errdev("read failed, not enough memory\n");
 539                         mutex_unlock(&dev->fileop_lock);
 540                         return -ENOMEM;
 541                 }
 542                 dev->io = IO_READ;
 543                 dev->stream = STREAM_ON;
 544                 em28xx_queue_unusedframes(dev);
 545         }
 546
 547         if (!count) {
 548                 mutex_unlock(&dev->fileop_lock);
 549                 return 0;
 550         }
 551
 552         if (list_empty(&dev->outqueue)) {
 553                 if (filp->f_flags & O_NONBLOCK) {
 554                         mutex_unlock(&dev->fileop_lock);
 555                         return -EAGAIN;
 556                 }
 557                 ret = wait_event_interruptible
 558                     (dev->wait_frame,
 559                      (!list_empty(&dev->outqueue)) ||
 560                      (dev->state & DEV_DISCONNECTED));
 561                 if (ret) {
 562                         mutex_unlock(&dev->fileop_lock);
 563                         return ret;
 564                 }
 565                 if (dev->state & DEV_DISCONNECTED) {
 566                         mutex_unlock(&dev->fileop_lock);
 567                         return -ENODEV;
 568                 }
 569         }
 570
 571         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 572
 573         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 574         list_for_each_entry(i, &dev->outqueue, frame)
 575             i->state = F_UNUSED;
 576         INIT_LIST_HEAD(&dev->outqueue);
 577         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 578
 579         em28xx_queue_unusedframes(dev);
 580
 581         if (count > f->buf.length)
 582                 count = f->buf.length;
 583
 584         if (copy_to_user(buf, f->bufmem, count)) {
 585                 mutex_unlock(&dev->fileop_lock);
 586                 return -EFAULT;
 587         }
 588         *f_pos += count;
 589
 590         mutex_unlock(&dev->fileop_lock);
 591
 592         return count;
 593 }
 594
 595 /*
 596  * em28xx_v4l2_poll()
 597  * will allocate buffers when called for the first time
 598  */
 599 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 600 {
 601         unsigned int mask = 0;
 602         struct em28xx *dev = filp->private_data;
 603
 604         if (mutex_lock_interruptible(&dev->fileop_lock))
 605                 return POLLERR;
 606
 607         if (dev->state & DEV_DISCONNECTED) {
 608                 em28xx_videodbg("device not present\n");
 609         } else if (dev->state & DEV_MISCONFIGURED) {
 610                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 611         } else {
 612                 if (dev->io == IO_NONE) {
 613                         if (!em28xx_request_buffers
 614                             (dev, EM28XX_NUM_READ_FRAMES)) {
 615                                 em28xx_warn
 616                                     ("poll() failed, not enough memory\n");
 617                         } else {
 618                                 dev->io = IO_READ;
 619                                 dev->stream = STREAM_ON;
 620                         }
 621                 }
 622
 623                 if (dev->io == IO_READ) {
 624                         em28xx_queue_unusedframes(dev);
 625                         poll_wait(filp, &dev->wait_frame, wait);
 626
 627                         if (!list_empty(&dev->outqueue))
 628                                 mask |= POLLIN | POLLRDNORM;
 629
 630                         mutex_unlock(&dev->fileop_lock);
 631
 632                         return mask;
 633                 }
 634         }
 635
 636         mutex_unlock(&dev->fileop_lock);
 637         return POLLERR;
 638 }
 639
 640 /*
 641  * em28xx_vm_open()
 642  */
 643 static void em28xx_vm_open(struct vm_area_struct *vma)
 644 {
 645         struct em28xx_frame_t *f = vma->vm_private_data;
 646         f->vma_use_count++;
 647 }
 648
 649 /*
 650  * em28xx_vm_close()
 651  */
 652 static void em28xx_vm_close(struct vm_area_struct *vma)
 653 {
 654         /* NOTE: buffers are not freed here */
 655         struct em28xx_frame_t *f = vma->vm_private_data;
 656         f->vma_use_count--;
 657 }
 658
 659 static struct vm_operations_struct em28xx_vm_ops = {
 660         .open = em28xx_vm_open,
 661         .close = em28xx_vm_close,
 662 };
 663
 664 /*
 665  * em28xx_v4l2_mmap()
 666  */
 667 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 668 {
 669         unsigned long size = vma->vm_end - vma->vm_start,
 670             start = vma->vm_start;
 671         void *pos;
 672         u32 i;
 673
 674         struct em28xx *dev = filp->private_data;
 675
 676         if (mutex_lock_interruptible(&dev->fileop_lock))
 677                 return -ERESTARTSYS;
 678
 679         if (dev->state & DEV_DISCONNECTED) {
 680                 em28xx_videodbg("mmap: device not present\n");
 681                 mutex_unlock(&dev->fileop_lock);
 682                 return -ENODEV;
 683         }
 684
 685         if (dev->state & DEV_MISCONFIGURED) {
 686                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 687                                                 "open it again\n");
 688                 mutex_unlock(&dev->fileop_lock);
 689                 return -EIO;
 690         }
 691
 692         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 693             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 694                 mutex_unlock(&dev->fileop_lock);
 695                 return -EINVAL;
 696         }
 697
 698         for (i = 0; i < dev->num_frames; i++) {
 699                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 700                         break;
 701         }
 702         if (i == dev->num_frames) {
 703                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 704                 mutex_unlock(&dev->fileop_lock);
 705                 return -EINVAL;
 706         }
 707
 708         /* VM_IO is eventually going to replace PageReserved altogether */
 709         vma->vm_flags |= VM_IO;
 710         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 711
 712         pos = dev->frame[i].bufmem;
 713         while (size > 0) {      /* size is page-aligned */
 714                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 715                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 716                         mutex_unlock(&dev->fileop_lock);
 717                         return -EAGAIN;
 718                 }
 719                 start += PAGE_SIZE;
 720                 pos += PAGE_SIZE;
 721                 size -= PAGE_SIZE;
 722         }
 723
 724         vma->vm_ops = &em28xx_vm_ops;
 725         vma->vm_private_data = &dev->frame[i];
 726
 727         em28xx_vm_open(vma);
 728         mutex_unlock(&dev->fileop_lock);
 729         return 0;
 730 }
 731
 732 /*
 733  * em28xx_get_ctrl()
 734  * return the current saturation, brightness or contrast, mute state
 735  */
 736 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 737 {
 738         switch (ctrl->id) {
 739         case V4L2_CID_AUDIO_MUTE:
 740                 ctrl->value = dev->mute;
 741                 return 0;
 742         case V4L2_CID_AUDIO_VOLUME:
 743                 ctrl->value = dev->volume;
 744                 return 0;
 745         default:
 746                 return -EINVAL;
 747         }
 748 }
 749
 750 /*FIXME: should be moved to saa711x */
 751 static int saa711x_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 752 {
 753         s32 tmp;
 754         switch (ctrl->id) {
 755         case V4L2_CID_BRIGHTNESS:
 756                 if ((tmp = em28xx_brightness_get(dev)) < 0)
 757                         return -EIO;
 758                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 759                 return 0;
 760         case V4L2_CID_CONTRAST:
 761                 if ((ctrl->value = em28xx_contrast_get(dev)) < 0)
 762                         return -EIO;
 763                 return 0;
 764         case V4L2_CID_SATURATION:
 765                 if ((ctrl->value = em28xx_saturation_get(dev)) < 0)
 766                         return -EIO;
 767                 return 0;
 768         case V4L2_CID_RED_BALANCE:
 769                 if ((tmp = em28xx_v_balance_get(dev)) < 0)
 770                         return -EIO;
 771                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 772                 return 0;
 773         case V4L2_CID_BLUE_BALANCE:
 774                 if ((tmp = em28xx_u_balance_get(dev)) < 0)
 775                         return -EIO;
 776                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 777                 return 0;
 778         case V4L2_CID_GAMMA:
 779                 if ((ctrl->value = em28xx_gamma_get(dev)) < 0)
 780                         return -EIO;
 781                 return 0;
 782         default:
 783                 return -EINVAL;
 784         }
 785 }
 786
 787 /*
 788  * em28xx_set_ctrl()
 789  * mute or set new saturation, brightness or contrast
 790  */
 791 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 792 {
 793         switch (ctrl->id) {
 794         case V4L2_CID_AUDIO_MUTE:
 795                 if (ctrl->value != dev->mute) {
 796                         dev->mute = ctrl->value;
 797                         em28xx_audio_usb_mute(dev, ctrl->value);
 798                         return em28xx_audio_analog_set(dev);
 799                 }
 800                 return 0;
 801         case V4L2_CID_AUDIO_VOLUME:
 802                 dev->volume = ctrl->value;
 803                 return em28xx_audio_analog_set(dev);
 804         default:
 805                 return -EINVAL;
 806         }
 807 }
 808
 809 /*FIXME: should be moved to saa711x */
 810 static int saa711x_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 811 {
 812         switch (ctrl->id) {
 813         case V4L2_CID_BRIGHTNESS:
 814                 return em28xx_brightness_set(dev, ctrl->value);
 815         case V4L2_CID_CONTRAST:
 816                 return em28xx_contrast_set(dev, ctrl->value);
 817         case V4L2_CID_SATURATION:
 818                 return em28xx_saturation_set(dev, ctrl->value);
 819         case V4L2_CID_RED_BALANCE:
 820                 return em28xx_v_balance_set(dev, ctrl->value);
 821         case V4L2_CID_BLUE_BALANCE:
 822                 return em28xx_u_balance_set(dev, ctrl->value);
 823         case V4L2_CID_GAMMA:
 824                 return em28xx_gamma_set(dev, ctrl->value);
 825         default:
 826                 return -EINVAL;
 827         }
 828 }
 829
 830 /*
 831  * em28xx_stream_interrupt()
 832  * stops streaming
 833  */
 834 static int em28xx_stream_interrupt(struct em28xx *dev)
 835 {
 836         int ret = 0;
 837
 838         /* stop reading from the device */
 839
 840         dev->stream = STREAM_INTERRUPT;
 841         ret = wait_event_timeout(dev->wait_stream,
 842                                  (dev->stream == STREAM_OFF) ||
 843                                  (dev->state & DEV_DISCONNECTED),
 844                                  EM28XX_URB_TIMEOUT);
 845         if (dev->state & DEV_DISCONNECTED)
 846                 return -ENODEV;
 847         else if (ret) {
 848                 dev->state |= DEV_MISCONFIGURED;
 849                 em28xx_videodbg("device is misconfigured; close and "
 850                         "open /dev/video%d again\n",
 851                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
 852                 return ret;
 853         }
 854
 855         return 0;
 856 }
 857
 858 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 859 {
 860         unsigned int hscale, vscale;
 861         unsigned int maxh, maxw;
 862
 863         maxw = norm_maxw(dev);
 864         maxh = norm_maxh(dev);
 865
 866         /* width must even because of the YUYV format */
 867         /* height must be even because of interlacing */
 868         height &= 0xfffe;
 869         width &= 0xfffe;
 870
 871         if (height < 32)
 872                 height = 32;
 873         if (height > maxh)
 874                 height = maxh;
 875         if (width < 48)
 876                 width = 48;
 877         if (width > maxw)
 878                 width = maxw;
 879
 880         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 881                 hscale = 0x3fff;
 882         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 883
 884         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 885                 vscale = 0x3fff;
 886         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 887
 888         /* set new image size */
 889         dev->width = width;
 890         dev->height = height;
 891         dev->frame_size = dev->width * dev->height * 2;
 892         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 893         dev->bytesperline = dev->width * 2;
 894         dev->hscale = hscale;
 895         dev->vscale = vscale;
 896
 897         em28xx_resolution_set(dev);
 898
 899         return 0;
 900 }
 901
 902 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
 903 {
 904         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
 905                 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
 906                 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 907                 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
 908                 "V4L2_BUF_TYPE_VBI_CAPTURE" :
 909                 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
 910                 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
 911                 "not supported");
 912
 913         switch (format->type) {
 914         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 915         {
 916                 format->fmt.pix.width = dev->width;
 917                 format->fmt.pix.height = dev->height;
 918                 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 919                 format->fmt.pix.bytesperline = dev->bytesperline;
 920                 format->fmt.pix.sizeimage = dev->frame_size;
 921                 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 922                 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 923
 924                 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
 925                         dev->height);
 926                 break;
 927         }
 928
 929         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 930         {
 931                 format->fmt.sliced.service_set=0;
 932
 933                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 934
 935                 if (format->fmt.sliced.service_set==0)
 936                         return -EINVAL;
 937
 938                 break;
 939         }
 940
 941         default:
 942                 return -EINVAL;
 943         }
 944         return (0);
 945 }
 946
 947 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
 948 {
 949         u32 i;
 950         int ret = 0;
 951         int width = format->fmt.pix.width;
 952         int height = format->fmt.pix.height;
 953         unsigned int hscale, vscale;
 954         unsigned int maxh, maxw;
 955
 956         maxw = norm_maxw(dev);
 957         maxh = norm_maxh(dev);
 958
 959         em28xx_videodbg("%s: type=%s\n",
 960                         cmd == VIDIOC_TRY_FMT ?
 961                         "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 962                         format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
 963                         "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 964                         format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
 965                         "V4L2_BUF_TYPE_VBI_CAPTURE " :
 966                         "not supported");
 967
 968         if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 969                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 970
 971                 if (format->fmt.sliced.service_set==0)
 972                         return -EINVAL;
 973
 974                 return 0;
 975         }
 976
 977
 978         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 979                 return -EINVAL;
 980
 981         em28xx_videodbg("%s: requested %dx%d\n",
 982                 cmd == VIDIOC_TRY_FMT ?
 983                 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 984                 format->fmt.pix.width, format->fmt.pix.height);
 985
 986         /* FIXME: Move some code away from here */
 987         /* width must even because of the YUYV format */
 988         /* height must be even because of interlacing */
 989         height &= 0xfffe;
 990         width &= 0xfffe;
 991
 992         if (height < 32)
 993                 height = 32;
 994         if (height > maxh)
 995                 height = maxh;
 996         if (width < 48)
 997                 width = 48;
 998         if (width > maxw)
 999                 width = maxw;
1000
1001         if(dev->is_em2800){
1002                 /* the em2800 can only scale down to 50% */
1003                 if(height % (maxh / 2))
1004                         height=maxh;
1005                 if(width % (maxw / 2))
1006                         width=maxw;
1007                 /* according to empiatech support */
1008                 /* the MaxPacketSize is to small to support */
1009                 /* framesizes larger than 640x480 @ 30 fps */
1010                 /* or 640x576 @ 25 fps. As this would cut */
1011                 /* of a part of the image we prefer */
1012                 /* 360x576 or 360x480 for now */
1013                 if(width == maxw && height == maxh)
1014                         width /= 2;
1015         }
1016
1017         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
1018                 hscale = 0x3fff;
1019
1020         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
1021
1022         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
1023                 vscale = 0x3fff;
1024
1025         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
1026
1027         format->fmt.pix.width = width;
1028         format->fmt.pix.height = height;
1029         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1030         format->fmt.pix.bytesperline = width * 2;
1031         format->fmt.pix.sizeimage = width * 2 * height;
1032         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1033         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1034
1035         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
1036                 cmd == VIDIOC_TRY_FMT ?
1037                 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
1038                 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
1039
1040         if (cmd == VIDIOC_TRY_FMT)
1041                 return 0;
1042
1043         for (i = 0; i < dev->num_frames; i++)
1044                 if (dev->frame[i].vma_use_count) {
1045                         em28xx_videodbg("VIDIOC_S_FMT failed. "
1046                                 "Unmap the buffers first.\n");
1047                         return -EINVAL;
1048                 }
1049
1050         /* stop io in case it is already in progress */
1051         if (dev->stream == STREAM_ON) {
1052                 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
1053                 if ((ret = em28xx_stream_interrupt(dev)))
1054                         return ret;
1055         }
1056
1057         em28xx_release_buffers(dev);
1058         dev->io = IO_NONE;
1059
1060         /* set new image size */
1061         dev->width = width;
1062         dev->height = height;
1063         dev->frame_size = dev->width * dev->height * 2;
1064         dev->field_size = dev->frame_size >> 1;
1065         dev->bytesperline = dev->width * 2;
1066         dev->hscale = hscale;
1067         dev->vscale = vscale;
1068         em28xx_uninit_isoc(dev);
1069         em28xx_set_alternate(dev);
1070         em28xx_capture_start(dev, 1);
1071         em28xx_resolution_set(dev);
1072         em28xx_init_isoc(dev);
1073
1074         return 0;
1075 }
1076
1077 /*
1078  * em28xx_v4l2_do_ioctl()
1079  * This function is _not_ called directly, but from
1080  * em28xx_v4l2_ioctl. Userspace
1081  * copying is done already, arg is a kernel pointer.
1082  */
1083 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
1084                            struct em28xx *dev, unsigned int cmd, void *arg,
1085                            v4l2_kioctl driver_ioctl)
1086 {
1087         int ret;
1088
1089         switch (cmd) {
1090                 /* ---------- tv norms ---------- */
1091         case VIDIOC_ENUMSTD:
1092         {
1093                 struct v4l2_standard *e = arg;
1094                 unsigned int i;
1095
1096                 i = e->index;
1097                 if (i >= TVNORMS)
1098                         return -EINVAL;
1099                 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
1100                                                 tvnorms[e->index].name);
1101                 e->index = i;
1102                 if (ret < 0)
1103                         return ret;
1104                 return 0;
1105         }
1106         case VIDIOC_G_STD:
1107         {
1108                 v4l2_std_id *id = arg;
1109
1110                 *id = dev->tvnorm->id;
1111                 return 0;
1112         }
1113         case VIDIOC_S_STD:
1114         {
1115                 v4l2_std_id *id = arg;
1116                 unsigned int i;
1117
1118                 for (i = 0; i < TVNORMS; i++)
1119                         if (*id == tvnorms[i].id)
1120                                 break;
1121                 if (i == TVNORMS)
1122                         for (i = 0; i < TVNORMS; i++)
1123                                 if (*id & tvnorms[i].id)
1124                                         break;
1125                 if (i == TVNORMS)
1126                         return -EINVAL;
1127
1128                 mutex_lock(&dev->lock);
1129                 dev->tvnorm = &tvnorms[i];
1130
1131                 em28xx_set_norm(dev, dev->width, dev->height);
1132
1133                 em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
1134                                         &tvnorms[i].mode);
1135                 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
1136                                         &dev->tvnorm->id);
1137
1138                 mutex_unlock(&dev->lock);
1139
1140                 return 0;
1141         }
1142
1143         /* ------ input switching ---------- */
1144         case VIDIOC_ENUMINPUT:
1145         {
1146                 struct v4l2_input *i = arg;
1147                 unsigned int n;
1148                 static const char *iname[] = {
1149                         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1150                         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1151                         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1152                         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1153                         [EM28XX_VMUX_SVIDEO] = "S-Video",
1154                         [EM28XX_VMUX_TELEVISION] = "Television",
1155                         [EM28XX_VMUX_CABLE] = "Cable TV",
1156                         [EM28XX_VMUX_DVB] = "DVB",
1157                         [EM28XX_VMUX_DEBUG] = "for debug only",
1158                 };
1159
1160                 n = i->index;
1161                 if (n >= MAX_EM28XX_INPUT)
1162                         return -EINVAL;
1163                 if (0 == INPUT(n)->type)
1164                         return -EINVAL;
1165                 memset(i, 0, sizeof(*i));
1166                 i->index = n;
1167                 i->type = V4L2_INPUT_TYPE_CAMERA;
1168                 strcpy(i->name, iname[INPUT(n)->type]);
1169                 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1170                         (EM28XX_VMUX_CABLE == INPUT(n)->type))
1171                         i->type = V4L2_INPUT_TYPE_TUNER;
1172                 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1173                         i->std |= tvnorms[n].id;
1174                 return 0;
1175         }
1176         case VIDIOC_G_INPUT:
1177         {
1178                 int *i = arg;
1179                 *i = dev->ctl_input;
1180
1181                 return 0;
1182         }
1183         case VIDIOC_S_INPUT:
1184         {
1185                 int *index = arg;
1186
1187                 if (*index >= MAX_EM28XX_INPUT)
1188                         return -EINVAL;
1189                 if (0 == INPUT(*index)->type)
1190                         return -EINVAL;
1191
1192                 mutex_lock(&dev->lock);
1193                 video_mux(dev, *index);
1194                 mutex_unlock(&dev->lock);
1195
1196                 return 0;
1197         }
1198         case VIDIOC_G_AUDIO:
1199         {
1200                 struct v4l2_audio *a = arg;
1201                 unsigned int index = a->index;
1202
1203                 if (a->index > 1)
1204                         return -EINVAL;
1205                 memset(a, 0, sizeof(*a));
1206                 index = dev->ctl_ainput;
1207
1208                 if (index == 0) {
1209                         strcpy(a->name, "Television");
1210                 } else {
1211                         strcpy(a->name, "Line In");
1212                 }
1213                 a->capability = V4L2_AUDCAP_STEREO;
1214                 a->index = index;
1215                 return 0;
1216         }
1217         case VIDIOC_S_AUDIO:
1218         {
1219                 struct v4l2_audio *a = arg;
1220
1221                 if (a->index != dev->ctl_ainput)
1222                         return -EINVAL;
1223
1224                 return 0;
1225         }
1226
1227         /* --- controls ---------------------------------------------- */
1228         case VIDIOC_QUERYCTRL:
1229         {
1230                 struct v4l2_queryctrl *qc = arg;
1231                 int i, id=qc->id;
1232
1233                 memset(qc,0,sizeof(*qc));
1234                 qc->id=id;
1235
1236                 if (!dev->has_msp34xx) {
1237                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1238                                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1239                                         memcpy(qc, &(em28xx_qctrl[i]),
1240                                         sizeof(*qc));
1241                                         return 0;
1242                                 }
1243                         }
1244                 }
1245                 if (dev->decoder == EM28XX_TVP5150) {
1246                         em28xx_i2c_call_clients(dev,cmd,qc);
1247                         if (qc->type)
1248                                 return 0;
1249                         else
1250                                 return -EINVAL;
1251                 }
1252                 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1253                         if (qc->id && qc->id == saa711x_qctrl[i].id) {
1254                                 memcpy(qc, &(saa711x_qctrl[i]),
1255                                         sizeof(*qc));
1256                                 return 0;
1257                         }
1258                 }
1259
1260                 return -EINVAL;
1261         }
1262         case VIDIOC_G_CTRL:
1263         {
1264                 struct v4l2_control *ctrl = arg;
1265                 int retval=-EINVAL;
1266
1267                 if (!dev->has_msp34xx)
1268                         retval=em28xx_get_ctrl(dev, ctrl);
1269                 if (retval==-EINVAL) {
1270                         if (dev->decoder == EM28XX_TVP5150) {
1271                                 em28xx_i2c_call_clients(dev,cmd,arg);
1272                                 return 0;
1273                         }
1274
1275                         return saa711x_get_ctrl(dev, ctrl);
1276                 } else return retval;
1277         }
1278         case VIDIOC_S_CTRL:
1279         {
1280                 struct v4l2_control *ctrl = arg;
1281                 u8 i;
1282
1283                 if (!dev->has_msp34xx){
1284                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1285                                 if (ctrl->id == em28xx_qctrl[i].id) {
1286                                         if (ctrl->value <
1287                                         em28xx_qctrl[i].minimum
1288                                         || ctrl->value >
1289                                         em28xx_qctrl[i].maximum)
1290                                                 return -ERANGE;
1291                                         return em28xx_set_ctrl(dev, ctrl);
1292                                 }
1293                         }
1294                 }
1295
1296                 if (dev->decoder == EM28XX_TVP5150) {
1297                         em28xx_i2c_call_clients(dev,cmd,arg);
1298                         return 0;
1299                 } else if (!dev->has_msp34xx) {
1300                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1301                                 if (ctrl->id == em28xx_qctrl[i].id) {
1302                                         if (ctrl->value <
1303                                         em28xx_qctrl[i].minimum
1304                                         || ctrl->value >
1305                                         em28xx_qctrl[i].maximum)
1306                                                 return -ERANGE;
1307                                         return em28xx_set_ctrl(dev, ctrl);
1308                                 }
1309                         }
1310                         for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1311                                 if (ctrl->id == saa711x_qctrl[i].id) {
1312                                         if (ctrl->value <
1313                                         saa711x_qctrl[i].minimum
1314                                         || ctrl->value >
1315                                         saa711x_qctrl[i].maximum)
1316                                                 return -ERANGE;
1317                                         return saa711x_set_ctrl(dev, ctrl);
1318                                 }
1319                         }
1320                 }
1321
1322                 return -EINVAL;
1323         }
1324         /* --- tuner ioctls ------------------------------------------ */
1325         case VIDIOC_G_TUNER:
1326         {
1327                 struct v4l2_tuner *t = arg;
1328                 int status = 0;
1329
1330                 if (0 != t->index)
1331                         return -EINVAL;
1332
1333                 memset(t, 0, sizeof(*t));
1334                 strcpy(t->name, "Tuner");
1335                 t->type = V4L2_TUNER_ANALOG_TV;
1336                 t->capability = V4L2_TUNER_CAP_NORM;
1337                 t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1338 /*              t->signal = 0xffff;*/
1339 /*              em28xx_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1340                 /* No way to get signal strength? */
1341                 mutex_lock(&dev->lock);
1342                 em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1343                                         &status);
1344                 mutex_unlock(&dev->lock);
1345                 t->signal =
1346                         (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1347
1348                 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1349                                 t->afc);
1350                 return 0;
1351         }
1352         case VIDIOC_S_TUNER:
1353         {
1354                 struct v4l2_tuner *t = arg;
1355                 int status = 0;
1356
1357                 if (0 != t->index)
1358                         return -EINVAL;
1359                 memset(t, 0, sizeof(*t));
1360                 strcpy(t->name, "Tuner");
1361                 t->type = V4L2_TUNER_ANALOG_TV;
1362                 t->capability = V4L2_TUNER_CAP_NORM;
1363                 t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1364 /*              t->signal = 0xffff; */
1365                 /* No way to get signal strength? */
1366                 mutex_lock(&dev->lock);
1367                 em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1368                                         &status);
1369                 mutex_unlock(&dev->lock);
1370                 t->signal =
1371                         (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1372
1373                 em28xx_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1374                                 t->signal, t->afc);
1375                 return 0;
1376         }
1377         case VIDIOC_G_FREQUENCY:
1378         {
1379                 struct v4l2_frequency *f = arg;
1380
1381                 memset(f, 0, sizeof(*f));
1382                 f->type = V4L2_TUNER_ANALOG_TV;
1383                 f->frequency = dev->ctl_freq;
1384
1385                 return 0;
1386         }
1387         case VIDIOC_S_FREQUENCY:
1388         {
1389                 struct v4l2_frequency *f = arg;
1390
1391                 if (0 != f->tuner)
1392                         return -EINVAL;
1393
1394                 if (V4L2_TUNER_ANALOG_TV != f->type)
1395                         return -EINVAL;
1396
1397                 mutex_lock(&dev->lock);
1398                 dev->ctl_freq = f->frequency;
1399                 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1400                 mutex_unlock(&dev->lock);
1401                 return 0;
1402         }
1403         case VIDIOC_CROPCAP:
1404         {
1405                 struct v4l2_cropcap *cc = arg;
1406
1407                 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1408                         return -EINVAL;
1409                 cc->bounds.left = 0;
1410                 cc->bounds.top = 0;
1411                 cc->bounds.width = dev->width;
1412                 cc->bounds.height = dev->height;
1413                 cc->defrect = cc->bounds;
1414                 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1415                 cc->pixelaspect.denominator = 59;
1416                 return 0;
1417         }
1418         case VIDIOC_STREAMON:
1419         {
1420                 int *type = arg;
1421
1422                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1423                         || dev->io != IO_MMAP)
1424                         return -EINVAL;
1425
1426                 if (list_empty(&dev->inqueue))
1427                         return -EINVAL;
1428
1429                 dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1430
1431                 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1432
1433                 return 0;
1434         }
1435         case VIDIOC_STREAMOFF:
1436         {
1437                 int *type = arg;
1438                 int ret;
1439
1440                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1441                         || dev->io != IO_MMAP)
1442                         return -EINVAL;
1443
1444                 if (dev->stream == STREAM_ON) {
1445                         em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1446                         if ((ret = em28xx_stream_interrupt(dev)))
1447                                 return ret;
1448                 }
1449                 em28xx_empty_framequeues(dev);
1450
1451                 return 0;
1452         }
1453         default:
1454                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1455                                                   driver_ioctl);
1456         }
1457         return 0;
1458 }
1459
1460 /*
1461  * em28xx_v4l2_do_ioctl()
1462  * This function is _not_ called directly, but from
1463  * em28xx_v4l2_ioctl. Userspace
1464  * copying is done already, arg is a kernel pointer.
1465  */
1466 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1467                                  unsigned int cmd, void *arg)
1468 {
1469         struct em28xx *dev = filp->private_data;
1470
1471         if (!dev)
1472                 return -ENODEV;
1473
1474         if (video_debug > 1)
1475                 v4l_print_ioctl(dev->name,cmd);
1476
1477         switch (cmd) {
1478
1479                 /* --- capabilities ------------------------------------------ */
1480         case VIDIOC_QUERYCAP:
1481                 {
1482                 struct v4l2_capability *cap = arg;
1483
1484                 memset(cap, 0, sizeof(*cap));
1485                 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1486                 strlcpy(cap->card, em28xx_boards[dev->model].name,
1487                         sizeof(cap->card));
1488                 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1489                         sizeof(cap->bus_info));
1490                 cap->version = EM28XX_VERSION_CODE;
1491                 cap->capabilities =
1492                                 V4L2_CAP_SLICED_VBI_CAPTURE |
1493                                 V4L2_CAP_VIDEO_CAPTURE |
1494                                 V4L2_CAP_AUDIO |
1495                                 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1496                 if (dev->has_tuner)
1497                         cap->capabilities |= V4L2_CAP_TUNER;
1498                 return 0;
1499         }
1500         /* --- capture ioctls ---------------------------------------- */
1501         case VIDIOC_ENUM_FMT:
1502         {
1503                 struct v4l2_fmtdesc *fmtd = arg;
1504
1505                 if (fmtd->index != 0)
1506                         return -EINVAL;
1507                 memset(fmtd, 0, sizeof(*fmtd));
1508                 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1509                 strcpy(fmtd->description, "Packed YUY2");
1510                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1511                 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1512                 return 0;
1513         }
1514         case VIDIOC_G_FMT:
1515                 return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1516
1517         case VIDIOC_TRY_FMT:
1518         case VIDIOC_S_FMT:
1519                 return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1520
1521         case VIDIOC_REQBUFS:
1522         {
1523                 struct v4l2_requestbuffers *rb = arg;
1524                 u32 i;
1525                 int ret;
1526
1527                 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1528                         rb->memory != V4L2_MEMORY_MMAP)
1529                         return -EINVAL;
1530
1531                 if (dev->io == IO_READ) {
1532                         em28xx_videodbg ("method is set to read;"
1533                                 " close and open the device again to"
1534                                 " choose the mmap I/O method\n");
1535                         return -EINVAL;
1536                 }
1537
1538                 for (i = 0; i < dev->num_frames; i++)
1539                         if (dev->frame[i].vma_use_count) {
1540                                 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1541                                 return -EINVAL;
1542                         }
1543
1544                 if (dev->stream == STREAM_ON) {
1545                         em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1546                         if ((ret = em28xx_stream_interrupt(dev)))
1547                                 return ret;
1548                 }
1549
1550                 em28xx_empty_framequeues(dev);
1551
1552                 em28xx_release_buffers(dev);
1553                 if (rb->count)
1554                         rb->count =
1555                                 em28xx_request_buffers(dev, rb->count);
1556
1557                 dev->frame_current = NULL;
1558
1559                 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1560                                                 rb->count);
1561                 dev->io = rb->count ? IO_MMAP : IO_NONE;
1562                 return 0;
1563         }
1564         case VIDIOC_QUERYBUF:
1565         {
1566                 struct v4l2_buffer *b = arg;
1567
1568                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1569                         b->index >= dev->num_frames || dev->io != IO_MMAP)
1570                         return -EINVAL;
1571
1572                 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1573
1574                 if (dev->frame[b->index].vma_use_count) {
1575                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1576                 }
1577                 if (dev->frame[b->index].state == F_DONE)
1578                         b->flags |= V4L2_BUF_FLAG_DONE;
1579                 else if (dev->frame[b->index].state != F_UNUSED)
1580                         b->flags |= V4L2_BUF_FLAG_QUEUED;
1581                 return 0;
1582         }
1583         case VIDIOC_QBUF:
1584         {
1585                 struct v4l2_buffer *b = arg;
1586                 unsigned long lock_flags;
1587
1588                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1589                         b->index >= dev->num_frames || dev->io != IO_MMAP) {
1590                         return -EINVAL;
1591                 }
1592
1593                 if (dev->frame[b->index].state != F_UNUSED) {
1594                         return -EAGAIN;
1595                 }
1596                 dev->frame[b->index].state = F_QUEUED;
1597
1598                 /* add frame to fifo */
1599                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1600                 list_add_tail(&dev->frame[b->index].frame,
1601                                 &dev->inqueue);
1602                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1603
1604                 return 0;
1605         }
1606         case VIDIOC_DQBUF:
1607         {
1608                 struct v4l2_buffer *b = arg;
1609                 struct em28xx_frame_t *f;
1610                 unsigned long lock_flags;
1611                 int ret = 0;
1612
1613                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1614                         || dev->io != IO_MMAP)
1615                         return -EINVAL;
1616
1617                 if (list_empty(&dev->outqueue)) {
1618                         if (dev->stream == STREAM_OFF)
1619                                 return -EINVAL;
1620                         if (filp->f_flags & O_NONBLOCK)
1621                                 return -EAGAIN;
1622                         ret = wait_event_interruptible
1623                                 (dev->wait_frame,
1624                                 (!list_empty(&dev->outqueue)) ||
1625                                 (dev->state & DEV_DISCONNECTED));
1626                         if (ret)
1627                                 return ret;
1628                         if (dev->state & DEV_DISCONNECTED)
1629                                 return -ENODEV;
1630                 }
1631
1632                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1633                 f = list_entry(dev->outqueue.next,
1634                                 struct em28xx_frame_t, frame);
1635                 list_del(dev->outqueue.next);
1636                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1637
1638                 f->state = F_UNUSED;
1639                 memcpy(b, &f->buf, sizeof(*b));
1640
1641                 if (f->vma_use_count)
1642                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1643
1644                 return 0;
1645         }
1646         default:
1647                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1648                                        em28xx_video_do_ioctl);
1649         }
1650         return 0;
1651 }
1652
1653 /*
1654  * em28xx_v4l2_ioctl()
1655  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1656  */
1657 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1658                              unsigned int cmd, unsigned long arg)
1659 {
1660         int ret = 0;
1661         struct em28xx *dev = filp->private_data;
1662
1663         if (mutex_lock_interruptible(&dev->fileop_lock))
1664                 return -ERESTARTSYS;
1665
1666         if (dev->state & DEV_DISCONNECTED) {
1667                 em28xx_errdev("v4l2 ioctl: device not present\n");
1668                 mutex_unlock(&dev->fileop_lock);
1669                 return -ENODEV;
1670         }
1671
1672         if (dev->state & DEV_MISCONFIGURED) {
1673                 em28xx_errdev
1674                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1675                 mutex_unlock(&dev->fileop_lock);
1676                 return -EIO;
1677         }
1678
1679         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1680
1681         mutex_unlock(&dev->fileop_lock);
1682
1683         return ret;
1684 }
1685
1686 static struct file_operations em28xx_v4l_fops = {
1687         .owner = THIS_MODULE,
1688         .open = em28xx_v4l2_open,
1689         .release = em28xx_v4l2_close,
1690         .ioctl = em28xx_v4l2_ioctl,
1691         .read = em28xx_v4l2_read,
1692         .poll = em28xx_v4l2_poll,
1693         .mmap = em28xx_v4l2_mmap,
1694         .llseek = no_llseek,
1695         .compat_ioctl   = v4l_compat_ioctl32,
1696
1697 };
1698
1699 /******************************** usb interface *****************************************/
1700
1701 /*
1702  * em28xx_init_dev()
1703  * allocates and inits the device structs, registers i2c bus and v4l device
1704  */
1705 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1706                            int minor, int model)
1707 {
1708         struct em28xx *dev = *devhandle;
1709         int retval = -ENOMEM;
1710         int errCode, i;
1711         unsigned int maxh, maxw;
1712
1713         dev->udev = udev;
1714         dev->model = model;
1715         mutex_init(&dev->lock);
1716         init_waitqueue_head(&dev->open);
1717
1718         dev->em28xx_write_regs = em28xx_write_regs;
1719         dev->em28xx_read_reg = em28xx_read_reg;
1720         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1721         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1722         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1723         dev->is_em2800 = em28xx_boards[model].is_em2800;
1724         dev->has_tuner = em28xx_boards[model].has_tuner;
1725         dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1726         dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1727         dev->decoder = em28xx_boards[model].decoder;
1728
1729         if (tuner >= 0)
1730                 dev->tuner_type = tuner;
1731         else
1732                 dev->tuner_type = em28xx_boards[model].tuner_type;
1733
1734         dev->video_inputs = em28xx_boards[model].vchannels;
1735
1736         for (i = 0; i < TVNORMS; i++)
1737                 if (em28xx_boards[model].norm == tvnorms[i].mode)
1738                         break;
1739         if (i == TVNORMS)
1740                 i = 0;
1741
1742         dev->tvnorm = &tvnorms[i];      /* set default norm */
1743
1744         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1745
1746         maxw = norm_maxw(dev);
1747         maxh = norm_maxh(dev);
1748
1749         /* set default image size */
1750         dev->width = maxw;
1751         dev->height = maxh;
1752         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1753         dev->field_size = dev->width * dev->height;
1754         dev->frame_size =
1755             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1756         dev->bytesperline = dev->width * 2;
1757         dev->hscale = 0;
1758         dev->vscale = 0;
1759         dev->ctl_input = 2;
1760
1761         /* setup video picture settings for saa7113h */
1762         memset(&dev->vpic, 0, sizeof(dev->vpic));
1763         dev->vpic.colour = 128 << 8;
1764         dev->vpic.hue = 128 << 8;
1765         dev->vpic.brightness = 128 << 8;
1766         dev->vpic.contrast = 192 << 8;
1767         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1768         dev->vpic.depth = 16;
1769         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1770
1771         em28xx_pre_card_setup(dev);
1772 #ifdef CONFIG_MODULES
1773         /* request some modules */
1774         if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1775                 request_module("saa711x");
1776         if (dev->decoder == EM28XX_TVP5150)
1777                 request_module("tvp5150");
1778         if (dev->has_tuner)
1779                 request_module("tuner");
1780         if (dev->tda9887_conf)
1781                 request_module("tda9887");
1782 #endif
1783         errCode = em28xx_config(dev);
1784         if (errCode) {
1785                 em28xx_errdev("error configuring device\n");
1786                 kfree(dev);
1787                 em28xx_devused&=~(1<<dev->devno);
1788                 return -ENOMEM;
1789         }
1790
1791         mutex_lock(&dev->lock);
1792         /* register i2c bus */
1793         em28xx_i2c_register(dev);
1794
1795         /* Do board specific init and eeprom reading */
1796         em28xx_card_setup(dev);
1797
1798         /* configure the device */
1799         em28xx_config_i2c(dev);
1800
1801         mutex_unlock(&dev->lock);
1802
1803         errCode = em28xx_config(dev);
1804
1805 #ifdef CONFIG_MODULES
1806         if (dev->has_msp34xx)
1807                 request_module("msp3400");
1808 #endif
1809         /* allocate and fill v4l2 device struct */
1810         dev->vdev = video_device_alloc();
1811         if (NULL == dev->vdev) {
1812                 em28xx_errdev("cannot allocate video_device.\n");
1813                 kfree(dev);
1814                 em28xx_devused&=~(1<<dev->devno);
1815                 return -ENOMEM;
1816         }
1817
1818         dev->vbi_dev = video_device_alloc();
1819         if (NULL == dev->vbi_dev) {
1820                 em28xx_errdev("cannot allocate video_device.\n");
1821                 kfree(dev->vdev);
1822                 kfree(dev);
1823                 em28xx_devused&=~(1<<dev->devno);
1824                 return -ENOMEM;
1825         }
1826
1827         /* Fills VBI device info */
1828         dev->vbi_dev->type = VFL_TYPE_VBI;
1829         dev->vbi_dev->hardware = 0;
1830         dev->vbi_dev->fops = &em28xx_v4l_fops;
1831         dev->vbi_dev->minor = -1;
1832         dev->vbi_dev->dev = &dev->udev->dev;
1833         dev->vbi_dev->release = video_device_release;
1834         snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1835                                                          "em28xx",dev->devno,"vbi");
1836
1837         /* Fills CAPTURE device info */
1838         dev->vdev->type = VID_TYPE_CAPTURE;
1839         if (dev->has_tuner)
1840                 dev->vdev->type |= VID_TYPE_TUNER;
1841         dev->vdev->hardware = 0;
1842         dev->vdev->fops = &em28xx_v4l_fops;
1843         dev->vdev->minor = -1;
1844         dev->vdev->dev = &dev->udev->dev;
1845         dev->vdev->release = video_device_release;
1846         snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1847                                                          "em28xx",dev->devno,"video");
1848
1849         list_add_tail(&dev->devlist,&em28xx_devlist);
1850
1851         /* register v4l2 device */
1852         mutex_lock(&dev->lock);
1853         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1854                                          video_nr[dev->devno]))) {
1855                 em28xx_errdev("unable to register video device (error=%i).\n",
1856                               retval);
1857                 mutex_unlock(&dev->lock);
1858                 list_del(&dev->devlist);
1859                 video_device_release(dev->vdev);
1860                 kfree(dev);
1861                 em28xx_devused&=~(1<<dev->devno);
1862                 return -ENODEV;
1863         }
1864
1865         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1866                                         vbi_nr[dev->devno]) < 0) {
1867                 printk("unable to register vbi device\n");
1868                 mutex_unlock(&dev->lock);
1869                 list_del(&dev->devlist);
1870                 video_device_release(dev->vbi_dev);
1871                 video_device_release(dev->vdev);
1872                 kfree(dev);
1873                 em28xx_devused&=~(1<<dev->devno);
1874                 return -ENODEV;
1875         } else {
1876                 printk("registered VBI\n");
1877         }
1878
1879         if (dev->has_msp34xx) {
1880                 /* Send a reset to other chips via gpio */
1881                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1882                 udelay(2500);
1883                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1884                 udelay(2500);
1885
1886         }
1887         video_mux(dev, 0);
1888
1889         mutex_unlock(&dev->lock);
1890
1891         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1892                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1893                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1894
1895         return 0;
1896 }
1897
1898 /*
1899  * em28xx_usb_probe()
1900  * checks for supported devices
1901  */
1902 static int em28xx_usb_probe(struct usb_interface *interface,
1903                             const struct usb_device_id *id)
1904 {
1905         const struct usb_endpoint_descriptor *endpoint;
1906         struct usb_device *udev;
1907         struct usb_interface *uif;
1908         struct em28xx *dev = NULL;
1909         int retval = -ENODEV;
1910         int model,i,nr,ifnum;
1911
1912         udev = usb_get_dev(interface_to_usbdev(interface));
1913         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1914
1915         /* Check to see next free device and mark as used */
1916         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1917         em28xx_devused|=1<<nr;
1918
1919         /* Don't register audio interfaces */
1920         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1921                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1922                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1923                                 ifnum,
1924                                 interface->altsetting[0].desc.bInterfaceClass);
1925
1926                 em28xx_devused&=~(1<<nr);
1927                 return -ENODEV;
1928         }
1929
1930         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1931                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1932                         ifnum,
1933                         interface->altsetting[0].desc.bInterfaceClass);
1934
1935         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1936
1937         /* check if the the device has the iso in endpoint at the correct place */
1938         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1939             USB_ENDPOINT_XFER_ISOC) {
1940                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1941                 em28xx_devused&=~(1<<nr);
1942                 return -ENODEV;
1943         }
1944         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1945                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1946                 em28xx_devused&=~(1<<nr);
1947                 return -ENODEV;
1948         }
1949
1950         model=id->driver_info;
1951
1952         if (nr >= EM28XX_MAXBOARDS) {
1953                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1954                 em28xx_devused&=~(1<<nr);
1955                 return -ENOMEM;
1956         }
1957
1958         /* allocate memory for our device state and initialize it */
1959         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1960         if (dev == NULL) {
1961                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1962                 em28xx_devused&=~(1<<nr);
1963                 return -ENOMEM;
1964         }
1965
1966         snprintf(dev->name, 29, "em28xx #%d", nr);
1967         dev->devno=nr;
1968
1969         /* compute alternate max packet sizes */
1970         uif = udev->actconfig->interface[0];
1971
1972         dev->num_alt=uif->num_altsetting;
1973         em28xx_info("Alternate settings: %i\n",dev->num_alt);
1974 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1975         dev->alt_max_pkt_size = kmalloc(32*
1976                                                 dev->num_alt,GFP_KERNEL);
1977         if (dev->alt_max_pkt_size == NULL) {
1978                 em28xx_errdev("out of memory!\n");
1979                 em28xx_devused&=~(1<<nr);
1980                 return -ENOMEM;
1981         }
1982
1983         for (i = 0; i < dev->num_alt ; i++) {
1984                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1985                                                         wMaxPacketSize);
1986                 dev->alt_max_pkt_size[i] =
1987                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1988                 em28xx_info("Alternate setting %i, max size= %i\n",i,
1989                                                         dev->alt_max_pkt_size[i]);
1990         }
1991
1992         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1993                 model=card[nr];
1994
1995         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1996                 em28xx_errdev( "Your board has no eeprom inside it and thus can't\n"
1997                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
1998                         "%s: workaround that.  Redirect complaints to the vendor of\n"
1999                         "%s: the TV card. Generic type will be used."
2000                         "%s: Best regards,\n"
2001                         "%s:         -- tux\n",
2002                         dev->name,dev->name,dev->name,dev->name,dev->name);
2003                 em28xx_errdev("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
2004                         dev->name);
2005                 for (i = 0; i < em28xx_bcount; i++) {
2006                         em28xx_errdev("    card=%d -> %s\n", i,
2007                                                         em28xx_boards[i].name);
2008                 }
2009         }
2010
2011         /* allocate device struct */
2012         retval = em28xx_init_dev(&dev, udev, nr, model);
2013         if (retval)
2014                 return retval;
2015
2016         em28xx_info("Found %s\n", em28xx_boards[model].name);
2017
2018         /* save our data pointer in this interface device */
2019         usb_set_intfdata(interface, dev);
2020         return 0;
2021 }
2022
2023 /*
2024  * em28xx_usb_disconnect()
2025  * called when the device gets diconencted
2026  * video device will be unregistered on v4l2_close in case it is still open
2027  */
2028 static void em28xx_usb_disconnect(struct usb_interface *interface)
2029 {
2030         struct em28xx *dev = usb_get_intfdata(interface);
2031         usb_set_intfdata(interface, NULL);
2032
2033         if (!dev)
2034                 return;
2035
2036         down_write(&em28xx_disconnect);
2037
2038         mutex_lock(&dev->lock);
2039
2040         em28xx_info("disconnecting %s\n", dev->vdev->name);
2041
2042         wake_up_interruptible_all(&dev->open);
2043
2044         if (dev->users) {
2045                 em28xx_warn
2046                     ("device /dev/video%d is open! Deregistration and memory "
2047                      "deallocation are deferred on close.\n",
2048                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2049
2050                 dev->state |= DEV_MISCONFIGURED;
2051                 em28xx_uninit_isoc(dev);
2052                 dev->state |= DEV_DISCONNECTED;
2053                 wake_up_interruptible(&dev->wait_frame);
2054                 wake_up_interruptible(&dev->wait_stream);
2055         } else {
2056                 dev->state |= DEV_DISCONNECTED;
2057                 em28xx_release_resources(dev);
2058         }
2059
2060         mutex_unlock(&dev->lock);
2061
2062         if (!dev->users) {
2063                 kfree(dev->alt_max_pkt_size);
2064                 kfree(dev);
2065         }
2066
2067         up_write(&em28xx_disconnect);
2068 }
2069
2070 static struct usb_driver em28xx_usb_driver = {
2071         .name = "em28xx",
2072         .probe = em28xx_usb_probe,
2073         .disconnect = em28xx_usb_disconnect,
2074         .id_table = em28xx_id_table,
2075 };
2076
2077 static int __init em28xx_module_init(void)
2078 {
2079         int result;
2080
2081         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2082                (EM28XX_VERSION_CODE >> 16) & 0xff,
2083                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2084 #ifdef SNAPSHOT
2085         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2086                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2087 #endif
2088
2089         /* register this driver with the USB subsystem */
2090         result = usb_register(&em28xx_usb_driver);
2091         if (result)
2092                 em28xx_err(DRIVER_NAME
2093                            " usb_register failed. Error number %d.\n", result);
2094
2095         return result;
2096 }
2097
2098 static void __exit em28xx_module_exit(void)
2099 {
2100         /* deregister this driver with the USB subsystem */
2101         usb_deregister(&em28xx_usb_driver);
2102 }
2103
2104 module_init(em28xx_module_init);
2105 module_exit(em28xx_module_exit);