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   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   3
   4    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   5                       Markus Rechberger <mrechberger@gmail.com>
   6                       Mauro Carvalho Chehab <mchehab@brturbo.com.br>
   7                       Sascha Sommer <saschasommer@freenet.de>
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/list.h>
  26 #include <linux/module.h>
  27 #include <linux/kernel.h>
  28 #include <linux/usb.h>
  29 #include <linux/i2c.h>
  30 #include <linux/version.h>
  31 #include <linux/video_decoder.h>
  32 #include <linux/mutex.h>
  33
  34 #include "em28xx.h"
  35 #include <media/tuner.h>
  36 #include <media/v4l2-common.h>
  37
  38 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  39                       "Markus Rechberger <mrechberger@gmail.com>, " \
  40                       "Mauro Carvalho Chehab <mchehab@brturbo.com.br>, " \
  41                       "Sascha Sommer <saschasommer@freenet.de>"
  42
  43 #define DRIVER_NAME         "em28xx"
  44 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  45 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  46
  47 #define em28xx_videodbg(fmt, arg...) do {\
  48         if (video_debug) \
  49                 printk(KERN_INFO "%s %s :"fmt, \
  50                          dev->name, __FUNCTION__ , ##arg); } while (0)
  51
  52 MODULE_AUTHOR(DRIVER_AUTHOR);
  53 MODULE_DESCRIPTION(DRIVER_DESC);
  54 MODULE_LICENSE("GPL");
  55
  56 static LIST_HEAD(em28xx_devlist);
  57
  58 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  59 module_param_array(card,  int, NULL, 0444);
  60 MODULE_PARM_DESC(card,"card type");
  61
  62 static int tuner = -1;
  63 module_param(tuner, int, 0444);
  64 MODULE_PARM_DESC(tuner, "tuner type");
  65
  66 static unsigned int video_debug = 0;
  67 module_param(video_debug,int,0644);
  68 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  69
  70 /* supported tv norms */
  71 static struct em28xx_tvnorm tvnorms[] = {
  72         {
  73                 .name = "PAL",
  74                 .id = V4L2_STD_PAL,
  75                 .mode = VIDEO_MODE_PAL,
  76          }, {
  77                 .name = "NTSC",
  78                 .id = V4L2_STD_NTSC,
  79                 .mode = VIDEO_MODE_NTSC,
  80         }, {
  81                  .name = "SECAM",
  82                  .id = V4L2_STD_SECAM,
  83                  .mode = VIDEO_MODE_SECAM,
  84         }, {
  85                 .name = "PAL-M",
  86                 .id = V4L2_STD_PAL_M,
  87                 .mode = VIDEO_MODE_PAL,
  88         }
  89 };
  90
  91 static const unsigned char saa7114_i2c_init[] = {
  92         0x00,0x00,0x01,0x08,0x02,0xc4,0x03,0x30,0x04,0x90,0x05,0x90,0x06,0xeb,0x07,0xe0,
  93         0x08,0x88,0x09,0x40,0x0a,0x80,0x0b,0x44,0x0c,0x40,0x0d,0x00,0x0e,0x81,0x0f,0x2a,
  94         0x10,0x06,0x11,0x00,0x12,0xc8,0x13,0x80,0x14,0x00,0x15,0x11,0x16,0x01,0x17,0x42,
  95         0x18,0x40,0x19,0x80,0x40,0x00,0x41,0xff,0x42,0xff,0x43,0xff,0x44,0xff,0x45,0xff,
  96         0x46,0xff,0x47,0xff,0x48,0xff,0x49,0xff,0x4a,0xff,0x4b,0xff,0x4c,0xff,0x4d,0xff,
  97         0x4e,0xff,0x4f,0xff,0x50,0xff,0x51,0xff,0x52,0xff,0x53,0xff,0x54,0x5f,0x55,0xff,
  98         0x56,0xff,0x57,0xff,0x58,0x00,0x59,0x47,0x5a,0x03,0x5b,0x03,0x5d,0x3e,0x5e,0x00,
  99         0x80,0x1c,0x83,0x01,0x84,0xa5,0x85,0x10,0x86,0x45,0x87,0x41,0x88,0xf0,0x88,0x00,
 100         0x88,0xf0,0x90,0x00,0x91,0x08,0x92,0x00,0x93,0x80,0x94,0x08,0x95,0x00,0x96,0xc0,
 101         0x97,0x02,0x98,0x13,0x99,0x00,0x9a,0x38,0x9b,0x01,0x9c,0x80,0x9d,0x02,0x9e,0x06,
 102         0x9f,0x01,0xa0,0x01,0xa1,0x00,0xa2,0x00,0xa4,0x80,0xa5,0x36,0xa6,0x36,0xa8,0x67,
 103         0xa9,0x04,0xaa,0x00,0xac,0x33,0xad,0x02,0xae,0x00,0xb0,0xcd,0xb1,0x04,0xb2,0xcd,
 104         0xb3,0x04,0xb4,0x01,0xb8,0x00,0xb9,0x00,0xba,0x00,0xbb,0x00,0xbc,0x00,0xbd,0x00,
 105         0xbe,0x00,0xbf,0x00
 106 };
 107
 108 #define TVNORMS ARRAY_SIZE(tvnorms)
 109
 110 /* supported controls */
 111 /* Common to all boards */
 112 static struct v4l2_queryctrl em28xx_qctrl[] = {
 113         {
 114                 .id = V4L2_CID_AUDIO_VOLUME,
 115                 .type = V4L2_CTRL_TYPE_INTEGER,
 116                 .name = "Volume",
 117                 .minimum = 0x0,
 118                 .maximum = 0x1f,
 119                 .step = 0x1,
 120                 .default_value = 0x1f,
 121                 .flags = 0,
 122         },{
 123                 .id = V4L2_CID_AUDIO_MUTE,
 124                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 125                 .name = "Mute",
 126                 .minimum = 0,
 127                 .maximum = 1,
 128                 .step = 1,
 129                 .default_value = 1,
 130                 .flags = 0,
 131         }
 132 };
 133
 134 /* FIXME: These are specific to saa711x - should be moved to its code */
 135 static struct v4l2_queryctrl saa711x_qctrl[] = {
 136         {
 137                 .id = V4L2_CID_BRIGHTNESS,
 138                 .type = V4L2_CTRL_TYPE_INTEGER,
 139                 .name = "Brightness",
 140                 .minimum = -128,
 141                 .maximum = 127,
 142                 .step = 1,
 143                 .default_value = 0,
 144                 .flags = 0,
 145         },{
 146                 .id = V4L2_CID_CONTRAST,
 147                 .type = V4L2_CTRL_TYPE_INTEGER,
 148                 .name = "Contrast",
 149                 .minimum = 0x0,
 150                 .maximum = 0x1f,
 151                 .step = 0x1,
 152                 .default_value = 0x10,
 153                 .flags = 0,
 154         },{
 155                 .id = V4L2_CID_SATURATION,
 156                 .type = V4L2_CTRL_TYPE_INTEGER,
 157                 .name = "Saturation",
 158                 .minimum = 0x0,
 159                 .maximum = 0x1f,
 160                 .step = 0x1,
 161                 .default_value = 0x10,
 162                 .flags = 0,
 163         },{
 164                 .id = V4L2_CID_RED_BALANCE,
 165                 .type = V4L2_CTRL_TYPE_INTEGER,
 166                 .name = "Red chroma balance",
 167                 .minimum = -128,
 168                 .maximum = 127,
 169                 .step = 1,
 170                 .default_value = 0,
 171                 .flags = 0,
 172         },{
 173                 .id = V4L2_CID_BLUE_BALANCE,
 174                 .type = V4L2_CTRL_TYPE_INTEGER,
 175                 .name = "Blue chroma balance",
 176                 .minimum = -128,
 177                 .maximum = 127,
 178                 .step = 1,
 179                 .default_value = 0,
 180                 .flags = 0,
 181         },{
 182                 .id = V4L2_CID_GAMMA,
 183                 .type = V4L2_CTRL_TYPE_INTEGER,
 184                 .name = "Gamma",
 185                 .minimum = 0x0,
 186                 .maximum = 0x3f,
 187                 .step = 0x1,
 188                 .default_value = 0x20,
 189                 .flags = 0,
 190         }
 191 };
 192
 193 static struct usb_driver em28xx_usb_driver;
 194
 195 static DEFINE_MUTEX(em28xx_sysfs_lock);
 196 static DECLARE_RWSEM(em28xx_disconnect);
 197
 198 /*********************  v4l2 interface  ******************************************/
 199
 200 /*
 201  * em28xx_config()
 202  * inits registers with sane defaults
 203  */
 204 static int em28xx_config(struct em28xx *dev)
 205 {
 206
 207         /* Sets I2C speed to 100 KHz */
 208         em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 209
 210         /* enable vbi capturing */
 211         em28xx_audio_usb_mute(dev, 1);
 212         dev->mute = 1;          /* maybe not the right place... */
 213         dev->volume = 0x1f;
 214         em28xx_audio_analog_set(dev);
 215         em28xx_audio_analog_setup(dev);
 216         em28xx_outfmt_set_yuv422(dev);
 217         em28xx_colorlevels_set_default(dev);
 218         em28xx_compression_disable(dev);
 219
 220         return 0;
 221 }
 222
 223 /*
 224  * em28xx_config_i2c()
 225  * configure i2c attached devices
 226  */
 227 static void em28xx_config_i2c(struct em28xx *dev)
 228 {
 229         struct v4l2_frequency f;
 230         struct video_decoder_init em28xx_vdi = {.data = NULL };
 231
 232
 233         /* configure decoder */
 234         if(dev->model == EM2820_BOARD_MSI_VOX_USB_2){
 235                 em28xx_vdi.data=saa7114_i2c_init;
 236                 em28xx_vdi.len=sizeof(saa7114_i2c_init);
 237         }
 238
 239
 240         em28xx_i2c_call_clients(dev, DECODER_INIT, &em28xx_vdi);
 241         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
 242 /*      em28xx_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
 243 /*      em28xx_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
 244 /*      em28xx_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
 245 /*      em28xx_i2c_call_clients(dev,DECODER_DUMP, NULL); */
 246
 247         /* configure tuner */
 248         f.tuner = 0;
 249         f.type = V4L2_TUNER_ANALOG_TV;
 250         f.frequency = 9076;     /* FIXME:remove magic number */
 251         dev->ctl_freq = f.frequency;
 252         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 253
 254         /* configure tda9887 */
 255
 256
 257 /*      em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
 258 }
 259
 260 /*
 261  * em28xx_empty_framequeues()
 262  * prepare queues for incoming and outgoing frames
 263  */
 264 static void em28xx_empty_framequeues(struct em28xx *dev)
 265 {
 266         u32 i;
 267
 268         INIT_LIST_HEAD(&dev->inqueue);
 269         INIT_LIST_HEAD(&dev->outqueue);
 270
 271         for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
 272                 dev->frame[i].state = F_UNUSED;
 273                 dev->frame[i].buf.bytesused = 0;
 274         }
 275 }
 276
 277 static void video_mux(struct em28xx *dev, int index)
 278 {
 279         int input, ainput;
 280
 281         input = INPUT(index)->vmux;
 282         dev->ctl_input = index;
 283         dev->ctl_ainput = INPUT(index)->amux;
 284
 285         em28xx_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
 286
 287
 288         em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
 289
 290         if (dev->has_msp34xx) {
 291                 if (dev->i2s_speed)
 292                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 293                 em28xx_i2c_call_clients(dev, VIDIOC_S_AUDIO, &dev->ctl_ainput);
 294                 ainput = EM28XX_AUDIO_SRC_TUNER;
 295                 em28xx_audio_source(dev, ainput);
 296         } else {
 297                 switch (dev->ctl_ainput) {
 298                 case 0:
 299                         ainput = EM28XX_AUDIO_SRC_TUNER;
 300                         break;
 301                 default:
 302                         ainput = EM28XX_AUDIO_SRC_LINE;
 303                 }
 304                 em28xx_audio_source(dev, ainput);
 305         }
 306 }
 307
 308 /*
 309  * em28xx_v4l2_open()
 310  * inits the device and starts isoc transfer
 311  */
 312 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 313 {
 314         int minor = iminor(inode);
 315         int errCode = 0;
 316         struct em28xx *h,*dev = NULL;
 317         struct list_head *list;
 318
 319         list_for_each(list,&em28xx_devlist) {
 320                 h = list_entry(list, struct em28xx, devlist);
 321                 if (h->vdev->minor == minor) {
 322                         dev  = h;
 323                 }
 324         }
 325
 326         filp->private_data=dev;
 327
 328
 329         em28xx_videodbg("users=%d\n", dev->users);
 330
 331         if (!down_read_trylock(&em28xx_disconnect))
 332                 return -ERESTARTSYS;
 333
 334         if (dev->users) {
 335                 em28xx_warn("this driver can be opened only once\n");
 336                 up_read(&em28xx_disconnect);
 337                 return -EBUSY;
 338         }
 339
 340 /*      if(dev->vbi_dev->minor == minor){
 341                 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
 342         }*/
 343         if (dev->vdev->minor == minor) {
 344                 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 345         }
 346
 347         init_MUTEX(&dev->fileop_lock);  /* to 1 == available */
 348         spin_lock_init(&dev->queue_lock);
 349         init_waitqueue_head(&dev->wait_frame);
 350         init_waitqueue_head(&dev->wait_stream);
 351
 352         down(&dev->lock);
 353
 354         em28xx_set_alternate(dev);
 355
 356         dev->width = norm_maxw(dev);
 357         dev->height = norm_maxh(dev);
 358         dev->frame_size = dev->width * dev->height * 2;
 359         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 360         dev->bytesperline = dev->width * 2;
 361         dev->hscale = 0;
 362         dev->vscale = 0;
 363
 364         em28xx_capture_start(dev, 1);
 365         em28xx_resolution_set(dev);
 366
 367         /* start the transfer */
 368         errCode = em28xx_init_isoc(dev);
 369         if (errCode)
 370                 goto err;
 371
 372         dev->users++;
 373         filp->private_data = dev;
 374         dev->io = IO_NONE;
 375         dev->stream = STREAM_OFF;
 376         dev->num_frames = 0;
 377
 378         /* prepare queues */
 379         em28xx_empty_framequeues(dev);
 380
 381         dev->state |= DEV_INITIALIZED;
 382
 383         video_mux(dev, 0);
 384
 385       err:
 386         up(&dev->lock);
 387         up_read(&em28xx_disconnect);
 388         return errCode;
 389 }
 390
 391 /*
 392  * em28xx_realease_resources()
 393  * unregisters the v4l2,i2c and usb devices
 394  * called when the device gets disconected or at module unload
 395 */
 396 static void em28xx_release_resources(struct em28xx *dev)
 397 {
 398         mutex_lock(&em28xx_sysfs_lock);
 399
 400         em28xx_info("V4L2 device /dev/video%d deregistered\n",
 401                     dev->vdev->minor);
 402         list_del(&dev->devlist);
 403         video_unregister_device(dev->vdev);
 404 /*      video_unregister_device(dev->vbi_dev); */
 405         em28xx_i2c_unregister(dev);
 406         usb_put_dev(dev->udev);
 407         mutex_unlock(&em28xx_sysfs_lock);
 408 }
 409
 410 /*
 411  * em28xx_v4l2_close()
 412  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 413  */
 414 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 415 {
 416         int errCode;
 417         struct em28xx *dev=filp->private_data;
 418
 419         em28xx_videodbg("users=%d\n", dev->users);
 420
 421         down(&dev->lock);
 422
 423         em28xx_uninit_isoc(dev);
 424
 425         em28xx_release_buffers(dev);
 426
 427         /* the device is already disconnect, free the remaining resources */
 428         if (dev->state & DEV_DISCONNECTED) {
 429                 em28xx_release_resources(dev);
 430                 up(&dev->lock);
 431                 kfree(dev);
 432                 return 0;
 433         }
 434
 435         /* set alternate 0 */
 436         dev->alt = 0;
 437         em28xx_videodbg("setting alternate 0\n");
 438         errCode = usb_set_interface(dev->udev, 0, 0);
 439         if (errCode < 0) {
 440                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 441                      errCode);
 442         }
 443
 444         dev->users--;
 445         wake_up_interruptible_nr(&dev->open, 1);
 446         up(&dev->lock);
 447         return 0;
 448 }
 449
 450 /*
 451  * em28xx_v4l2_read()
 452  * will allocate buffers when called for the first time
 453  */
 454 static ssize_t
 455 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 456                  loff_t * f_pos)
 457 {
 458         struct em28xx_frame_t *f, *i;
 459         unsigned long lock_flags;
 460         int ret = 0;
 461         struct em28xx *dev = filp->private_data;
 462
 463         if (down_interruptible(&dev->fileop_lock))
 464                 return -ERESTARTSYS;
 465
 466         if (dev->state & DEV_DISCONNECTED) {
 467                 em28xx_videodbg("device not present\n");
 468                 up(&dev->fileop_lock);
 469                 return -ENODEV;
 470         }
 471
 472         if (dev->state & DEV_MISCONFIGURED) {
 473                 em28xx_videodbg("device misconfigured; close and open it again\n");
 474                 up(&dev->fileop_lock);
 475                 return -EIO;
 476         }
 477
 478         if (dev->io == IO_MMAP) {
 479                 em28xx_videodbg ("IO method is set to mmap; close and open"
 480                                 " the device again to choose the read method\n");
 481                 up(&dev->fileop_lock);
 482                 return -EINVAL;
 483         }
 484
 485         if (dev->io == IO_NONE) {
 486                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 487                         em28xx_errdev("read failed, not enough memory\n");
 488                         up(&dev->fileop_lock);
 489                         return -ENOMEM;
 490                 }
 491                 dev->io = IO_READ;
 492                 dev->stream = STREAM_ON;
 493                 em28xx_queue_unusedframes(dev);
 494         }
 495
 496         if (!count) {
 497                 up(&dev->fileop_lock);
 498                 return 0;
 499         }
 500
 501         if (list_empty(&dev->outqueue)) {
 502                 if (filp->f_flags & O_NONBLOCK) {
 503                         up(&dev->fileop_lock);
 504                         return -EAGAIN;
 505                 }
 506                 ret = wait_event_interruptible
 507                     (dev->wait_frame,
 508                      (!list_empty(&dev->outqueue)) ||
 509                      (dev->state & DEV_DISCONNECTED));
 510                 if (ret) {
 511                         up(&dev->fileop_lock);
 512                         return ret;
 513                 }
 514                 if (dev->state & DEV_DISCONNECTED) {
 515                         up(&dev->fileop_lock);
 516                         return -ENODEV;
 517                 }
 518         }
 519
 520         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 521
 522         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 523         list_for_each_entry(i, &dev->outqueue, frame)
 524             i->state = F_UNUSED;
 525         INIT_LIST_HEAD(&dev->outqueue);
 526         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 527
 528         em28xx_queue_unusedframes(dev);
 529
 530         if (count > f->buf.length)
 531                 count = f->buf.length;
 532
 533         if (copy_to_user(buf, f->bufmem, count)) {
 534                 up(&dev->fileop_lock);
 535                 return -EFAULT;
 536         }
 537         *f_pos += count;
 538
 539         up(&dev->fileop_lock);
 540
 541         return count;
 542 }
 543
 544 /*
 545  * em28xx_v4l2_poll()
 546  * will allocate buffers when called for the first time
 547  */
 548 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 549 {
 550         unsigned int mask = 0;
 551         struct em28xx *dev = filp->private_data;
 552
 553         if (down_interruptible(&dev->fileop_lock))
 554                 return POLLERR;
 555
 556         if (dev->state & DEV_DISCONNECTED) {
 557                 em28xx_videodbg("device not present\n");
 558         } else if (dev->state & DEV_MISCONFIGURED) {
 559                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 560         } else {
 561                 if (dev->io == IO_NONE) {
 562                         if (!em28xx_request_buffers
 563                             (dev, EM28XX_NUM_READ_FRAMES)) {
 564                                 em28xx_warn
 565                                     ("poll() failed, not enough memory\n");
 566                         } else {
 567                                 dev->io = IO_READ;
 568                                 dev->stream = STREAM_ON;
 569                         }
 570                 }
 571
 572                 if (dev->io == IO_READ) {
 573                         em28xx_queue_unusedframes(dev);
 574                         poll_wait(filp, &dev->wait_frame, wait);
 575
 576                         if (!list_empty(&dev->outqueue))
 577                                 mask |= POLLIN | POLLRDNORM;
 578
 579                         up(&dev->fileop_lock);
 580
 581                         return mask;
 582                 }
 583         }
 584
 585         up(&dev->fileop_lock);
 586         return POLLERR;
 587 }
 588
 589 /*
 590  * em28xx_vm_open()
 591  */
 592 static void em28xx_vm_open(struct vm_area_struct *vma)
 593 {
 594         struct em28xx_frame_t *f = vma->vm_private_data;
 595         f->vma_use_count++;
 596 }
 597
 598 /*
 599  * em28xx_vm_close()
 600  */
 601 static void em28xx_vm_close(struct vm_area_struct *vma)
 602 {
 603         /* NOTE: buffers are not freed here */
 604         struct em28xx_frame_t *f = vma->vm_private_data;
 605         f->vma_use_count--;
 606 }
 607
 608 static struct vm_operations_struct em28xx_vm_ops = {
 609         .open = em28xx_vm_open,
 610         .close = em28xx_vm_close,
 611 };
 612
 613 /*
 614  * em28xx_v4l2_mmap()
 615  */
 616 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 617 {
 618         unsigned long size = vma->vm_end - vma->vm_start,
 619             start = vma->vm_start;
 620         void *pos;
 621         u32 i;
 622
 623         struct em28xx *dev = filp->private_data;
 624
 625         if (down_interruptible(&dev->fileop_lock))
 626                 return -ERESTARTSYS;
 627
 628         if (dev->state & DEV_DISCONNECTED) {
 629                 em28xx_videodbg("mmap: device not present\n");
 630                 up(&dev->fileop_lock);
 631                 return -ENODEV;
 632         }
 633
 634         if (dev->state & DEV_MISCONFIGURED) {
 635                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 636                                                 "open it again\n");
 637                 up(&dev->fileop_lock);
 638                 return -EIO;
 639         }
 640
 641         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 642             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 643                 up(&dev->fileop_lock);
 644                 return -EINVAL;
 645         }
 646
 647         for (i = 0; i < dev->num_frames; i++) {
 648                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 649                         break;
 650         }
 651         if (i == dev->num_frames) {
 652                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 653                 up(&dev->fileop_lock);
 654                 return -EINVAL;
 655         }
 656
 657         /* VM_IO is eventually going to replace PageReserved altogether */
 658         vma->vm_flags |= VM_IO;
 659         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 660
 661         pos = dev->frame[i].bufmem;
 662         while (size > 0) {      /* size is page-aligned */
 663                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 664                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 665                         up(&dev->fileop_lock);
 666                         return -EAGAIN;
 667                 }
 668                 start += PAGE_SIZE;
 669                 pos += PAGE_SIZE;
 670                 size -= PAGE_SIZE;
 671         }
 672
 673         vma->vm_ops = &em28xx_vm_ops;
 674         vma->vm_private_data = &dev->frame[i];
 675
 676         em28xx_vm_open(vma);
 677         up(&dev->fileop_lock);
 678         return 0;
 679 }
 680
 681 /*
 682  * em28xx_get_ctrl()
 683  * return the current saturation, brightness or contrast, mute state
 684  */
 685 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 686 {
 687         switch (ctrl->id) {
 688         case V4L2_CID_AUDIO_MUTE:
 689                 ctrl->value = dev->mute;
 690                 return 0;
 691         case V4L2_CID_AUDIO_VOLUME:
 692                 ctrl->value = dev->volume;
 693                 return 0;
 694         default:
 695                 return -EINVAL;
 696         }
 697 }
 698
 699 /*FIXME: should be moved to saa711x */
 700 static int saa711x_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 701 {
 702         s32 tmp;
 703         switch (ctrl->id) {
 704         case V4L2_CID_BRIGHTNESS:
 705                 if ((tmp = em28xx_brightness_get(dev)) < 0)
 706                         return -EIO;
 707                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 708                 return 0;
 709         case V4L2_CID_CONTRAST:
 710                 if ((ctrl->value = em28xx_contrast_get(dev)) < 0)
 711                         return -EIO;
 712                 return 0;
 713         case V4L2_CID_SATURATION:
 714                 if ((ctrl->value = em28xx_saturation_get(dev)) < 0)
 715                         return -EIO;
 716                 return 0;
 717         case V4L2_CID_RED_BALANCE:
 718                 if ((tmp = em28xx_v_balance_get(dev)) < 0)
 719                         return -EIO;
 720                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 721                 return 0;
 722         case V4L2_CID_BLUE_BALANCE:
 723                 if ((tmp = em28xx_u_balance_get(dev)) < 0)
 724                         return -EIO;
 725                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 726                 return 0;
 727         case V4L2_CID_GAMMA:
 728                 if ((ctrl->value = em28xx_gamma_get(dev)) < 0)
 729                         return -EIO;
 730                 return 0;
 731         default:
 732                 return -EINVAL;
 733         }
 734 }
 735
 736 /*
 737  * em28xx_set_ctrl()
 738  * mute or set new saturation, brightness or contrast
 739  */
 740 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 741 {
 742         switch (ctrl->id) {
 743         case V4L2_CID_AUDIO_MUTE:
 744                 if (ctrl->value != dev->mute) {
 745                         dev->mute = ctrl->value;
 746                         em28xx_audio_usb_mute(dev, ctrl->value);
 747                         return em28xx_audio_analog_set(dev);
 748                 }
 749                 return 0;
 750         case V4L2_CID_AUDIO_VOLUME:
 751                 dev->volume = ctrl->value;
 752                 return em28xx_audio_analog_set(dev);
 753         default:
 754                 return -EINVAL;
 755         }
 756 }
 757
 758 /*FIXME: should be moved to saa711x */
 759 static int saa711x_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 760 {
 761         switch (ctrl->id) {
 762         case V4L2_CID_BRIGHTNESS:
 763                 return em28xx_brightness_set(dev, ctrl->value);
 764         case V4L2_CID_CONTRAST:
 765                 return em28xx_contrast_set(dev, ctrl->value);
 766         case V4L2_CID_SATURATION:
 767                 return em28xx_saturation_set(dev, ctrl->value);
 768         case V4L2_CID_RED_BALANCE:
 769                 return em28xx_v_balance_set(dev, ctrl->value);
 770         case V4L2_CID_BLUE_BALANCE:
 771                 return em28xx_u_balance_set(dev, ctrl->value);
 772         case V4L2_CID_GAMMA:
 773                 return em28xx_gamma_set(dev, ctrl->value);
 774         default:
 775                 return -EINVAL;
 776         }
 777 }
 778
 779 /*
 780  * em28xx_stream_interrupt()
 781  * stops streaming
 782  */
 783 static int em28xx_stream_interrupt(struct em28xx *dev)
 784 {
 785         int ret = 0;
 786
 787         /* stop reading from the device */
 788
 789         dev->stream = STREAM_INTERRUPT;
 790         ret = wait_event_timeout(dev->wait_stream,
 791                                  (dev->stream == STREAM_OFF) ||
 792                                  (dev->state & DEV_DISCONNECTED),
 793                                  EM28XX_URB_TIMEOUT);
 794         if (dev->state & DEV_DISCONNECTED)
 795                 return -ENODEV;
 796         else if (ret) {
 797                 dev->state |= DEV_MISCONFIGURED;
 798                 em28xx_videodbg("device is misconfigured; close and "
 799                         "open /dev/video%d again\n", dev->vdev->minor);
 800                 return ret;
 801         }
 802
 803         return 0;
 804 }
 805
 806 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 807 {
 808         unsigned int hscale, vscale;
 809         unsigned int maxh, maxw;
 810
 811         maxw = norm_maxw(dev);
 812         maxh = norm_maxh(dev);
 813
 814         /* width must even because of the YUYV format */
 815         /* height must be even because of interlacing */
 816         height &= 0xfffe;
 817         width &= 0xfffe;
 818
 819         if (height < 32)
 820                 height = 32;
 821         if (height > maxh)
 822                 height = maxh;
 823         if (width < 48)
 824                 width = 48;
 825         if (width > maxw)
 826                 width = maxw;
 827
 828         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 829                 hscale = 0x3fff;
 830         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 831
 832         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 833                 vscale = 0x3fff;
 834         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 835
 836         /* set new image size */
 837         dev->width = width;
 838         dev->height = height;
 839         dev->frame_size = dev->width * dev->height * 2;
 840         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 841         dev->bytesperline = dev->width * 2;
 842         dev->hscale = hscale;
 843         dev->vscale = vscale;
 844
 845         em28xx_resolution_set(dev);
 846
 847         return 0;
 848 }
 849
 850 /*
 851  * em28xx_v4l2_do_ioctl()
 852  * This function is _not_ called directly, but from
 853  * em28xx_v4l2_ioctl. Userspace
 854  * copying is done already, arg is a kernel pointer.
 855  */
 856 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 857                            struct em28xx *dev, unsigned int cmd, void *arg,
 858                            v4l2_kioctl driver_ioctl)
 859 {
 860         int ret;
 861
 862         switch (cmd) {
 863                 /* ---------- tv norms ---------- */
 864         case VIDIOC_ENUMSTD:
 865                 {
 866                         struct v4l2_standard *e = arg;
 867                         unsigned int i;
 868
 869                         i = e->index;
 870                         if (i >= TVNORMS)
 871                                 return -EINVAL;
 872                         ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 873                                                        tvnorms[e->index].name);
 874                         e->index = i;
 875                         if (ret < 0)
 876                                 return ret;
 877                         return 0;
 878                 }
 879         case VIDIOC_G_STD:
 880                 {
 881                         v4l2_std_id *id = arg;
 882
 883                         *id = dev->tvnorm->id;
 884                         return 0;
 885                 }
 886         case VIDIOC_S_STD:
 887                 {
 888                         v4l2_std_id *id = arg;
 889                         unsigned int i;
 890
 891                         for (i = 0; i < TVNORMS; i++)
 892                                 if (*id == tvnorms[i].id)
 893                                         break;
 894                         if (i == TVNORMS)
 895                                 for (i = 0; i < TVNORMS; i++)
 896                                         if (*id & tvnorms[i].id)
 897                                                 break;
 898                         if (i == TVNORMS)
 899                                 return -EINVAL;
 900
 901                         down(&dev->lock);
 902                         dev->tvnorm = &tvnorms[i];
 903
 904                         em28xx_set_norm(dev, dev->width, dev->height);
 905
 906 /*
 907                 dev->width=norm_maxw(dev);
 908                 dev->height=norm_maxh(dev);
 909                 dev->frame_size=dev->width*dev->height*2;
 910                 dev->field_size=dev->frame_size>>1;
 911                 dev->bytesperline=dev->width*2;
 912                 dev->hscale=0;
 913                 dev->vscale=0;
 914
 915                 em28xx_resolution_set(dev);
 916 */
 917 /*
 918                 em28xx_uninit_isoc(dev);
 919                 em28xx_set_alternate(dev);
 920                 em28xx_capture_start(dev, 1);
 921                 em28xx_resolution_set(dev);
 922                 em28xx_init_isoc(dev);
 923 */
 924                         em28xx_i2c_call_clients(dev, DECODER_SET_NORM,
 925                                                 &tvnorms[i].mode);
 926                         em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
 927                                                 &dev->tvnorm->id);
 928
 929                         up(&dev->lock);
 930
 931                         return 0;
 932                 }
 933
 934                 /* ------ input switching ---------- */
 935         case VIDIOC_ENUMINPUT:
 936                 {
 937                         struct v4l2_input *i = arg;
 938                         unsigned int n;
 939                         static const char *iname[] = {
 940                                 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 941                                 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 942                                 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 943                                 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 944                                 [EM28XX_VMUX_SVIDEO] = "S-Video",
 945                                 [EM28XX_VMUX_TELEVISION] = "Television",
 946                                 [EM28XX_VMUX_CABLE] = "Cable TV",
 947                                 [EM28XX_VMUX_DVB] = "DVB",
 948                                 [EM28XX_VMUX_DEBUG] = "for debug only",
 949                         };
 950
 951                         n = i->index;
 952                         if (n >= MAX_EM28XX_INPUT)
 953                                 return -EINVAL;
 954                         if (0 == INPUT(n)->type)
 955                                 return -EINVAL;
 956                         memset(i, 0, sizeof(*i));
 957                         i->index = n;
 958                         i->type = V4L2_INPUT_TYPE_CAMERA;
 959                         strcpy(i->name, iname[INPUT(n)->type]);
 960                         if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
 961                             (EM28XX_VMUX_CABLE == INPUT(n)->type))
 962                                 i->type = V4L2_INPUT_TYPE_TUNER;
 963                         for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
 964                                 i->std |= tvnorms[n].id;
 965                         return 0;
 966                 }
 967
 968         case VIDIOC_G_INPUT:
 969                 {
 970                         int *i = arg;
 971                         *i = dev->ctl_input;
 972
 973                         return 0;
 974                 }
 975
 976         case VIDIOC_S_INPUT:
 977                 {
 978                         int *index = arg;
 979
 980                         if (*index >= MAX_EM28XX_INPUT)
 981                                 return -EINVAL;
 982                         if (0 == INPUT(*index)->type)
 983                                 return -EINVAL;
 984
 985                         down(&dev->lock);
 986                         video_mux(dev, *index);
 987                         up(&dev->lock);
 988
 989                         return 0;
 990                 }
 991
 992         case VIDIOC_G_AUDIO:
 993                 {
 994                         struct v4l2_audio *a = arg;
 995                         unsigned int index = a->index;
 996
 997                         if (a->index > 1)
 998                                 return -EINVAL;
 999                         memset(a, 0, sizeof(*a));
1000                         index = dev->ctl_ainput;
1001
1002                         if (index == 0) {
1003                                 strcpy(a->name, "Television");
1004                         } else {
1005                                 strcpy(a->name, "Line In");
1006                         }
1007                         a->capability = V4L2_AUDCAP_STEREO;
1008                         a->index = index;
1009                         return 0;
1010                 }
1011
1012         case VIDIOC_S_AUDIO:
1013                 {
1014                         struct v4l2_audio *a = arg;
1015                         if (a->index != dev->ctl_ainput)
1016                                 return -EINVAL;
1017
1018                         return 0;
1019                 }
1020
1021                 /* --- controls ---------------------------------------------- */
1022         case VIDIOC_QUERYCTRL:
1023                 {
1024                         struct v4l2_queryctrl *qc = arg;
1025                         int i, id=qc->id;
1026
1027                         memset(qc,0,sizeof(*qc));
1028                         qc->id=id;
1029
1030                         if (!dev->has_msp34xx) {
1031                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1032                                         if (qc->id && qc->id == em28xx_qctrl[i].id) {
1033                                                 memcpy(qc, &(em28xx_qctrl[i]),
1034                                                 sizeof(*qc));
1035                                                 return 0;
1036                                         }
1037                                 }
1038                         }
1039                         if (dev->decoder == EM28XX_TVP5150) {
1040                                 em28xx_i2c_call_clients(dev,cmd,qc);
1041                                 if (qc->type)
1042                                         return 0;
1043                                 else
1044                                         return -EINVAL;
1045                         }
1046                         for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1047                                 if (qc->id && qc->id == saa711x_qctrl[i].id) {
1048                                         memcpy(qc, &(saa711x_qctrl[i]),
1049                                                sizeof(*qc));
1050                                         return 0;
1051                                 }
1052                         }
1053
1054                         return -EINVAL;
1055                 }
1056
1057         case VIDIOC_G_CTRL:
1058                 {
1059                         struct v4l2_control *ctrl = arg;
1060                         int retval=-EINVAL;
1061
1062                         if (!dev->has_msp34xx)
1063                                 retval=em28xx_get_ctrl(dev, ctrl);
1064                         if (retval==-EINVAL) {
1065                                 if (dev->decoder == EM28XX_TVP5150) {
1066                                         em28xx_i2c_call_clients(dev,cmd,arg);
1067                                         return 0;
1068                                 }
1069
1070                                 return saa711x_get_ctrl(dev, ctrl);
1071                         } else return retval;
1072                 }
1073
1074         case VIDIOC_S_CTRL:
1075                 {
1076                         struct v4l2_control *ctrl = arg;
1077                         u8 i;
1078
1079                         if (!dev->has_msp34xx){
1080                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1081                                         if (ctrl->id == em28xx_qctrl[i].id) {
1082                                                 if (ctrl->value <
1083                                                 em28xx_qctrl[i].minimum
1084                                                 || ctrl->value >
1085                                                 em28xx_qctrl[i].maximum)
1086                                                         return -ERANGE;
1087                                                 return em28xx_set_ctrl(dev, ctrl);
1088                                         }
1089                                 }
1090                         }
1091
1092                         if (dev->decoder == EM28XX_TVP5150) {
1093                                 em28xx_i2c_call_clients(dev,cmd,arg);
1094                                 return 0;
1095                         } else if (!dev->has_msp34xx) {
1096                                 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1097                                         if (ctrl->id == em28xx_qctrl[i].id) {
1098                                                 if (ctrl->value <
1099                                                 em28xx_qctrl[i].minimum
1100                                                 || ctrl->value >
1101                                                 em28xx_qctrl[i].maximum)
1102                                                         return -ERANGE;
1103                                                 return em28xx_set_ctrl(dev, ctrl);
1104                                         }
1105                                 }
1106                                 for (i = 0; i < ARRAY_SIZE(saa711x_qctrl); i++) {
1107                                         if (ctrl->id == saa711x_qctrl[i].id) {
1108                                                 if (ctrl->value <
1109                                                 saa711x_qctrl[i].minimum
1110                                                 || ctrl->value >
1111                                                 saa711x_qctrl[i].maximum)
1112                                                         return -ERANGE;
1113                                                 return saa711x_set_ctrl(dev, ctrl);
1114                                         }
1115                                 }
1116                         }
1117
1118                         return -EINVAL;
1119                 }
1120
1121                 /* --- tuner ioctls ------------------------------------------ */
1122         case VIDIOC_G_TUNER:
1123                 {
1124                         struct v4l2_tuner *t = arg;
1125                         int status = 0;
1126
1127                         if (0 != t->index)
1128                                 return -EINVAL;
1129
1130                         memset(t, 0, sizeof(*t));
1131                         strcpy(t->name, "Tuner");
1132                         t->type = V4L2_TUNER_ANALOG_TV;
1133                         t->capability = V4L2_TUNER_CAP_NORM;
1134                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1135 /*              t->signal = 0xffff;*/
1136 /*              em28xx_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1137                         /* No way to get signal strength? */
1138                         down(&dev->lock);
1139                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1140                                                 &status);
1141                         up(&dev->lock);
1142                         t->signal =
1143                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1144
1145                         em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1146                                  t->afc);
1147                         return 0;
1148                 }
1149         case VIDIOC_S_TUNER:
1150                 {
1151                         struct v4l2_tuner *t = arg;
1152                         int status = 0;
1153
1154                         if (0 != t->index)
1155                                 return -EINVAL;
1156                         memset(t, 0, sizeof(*t));
1157                         strcpy(t->name, "Tuner");
1158                         t->type = V4L2_TUNER_ANALOG_TV;
1159                         t->capability = V4L2_TUNER_CAP_NORM;
1160                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1161 /*              t->signal = 0xffff; */
1162                         /* No way to get signal strength? */
1163                         down(&dev->lock);
1164                         em28xx_i2c_call_clients(dev, DECODER_GET_STATUS,
1165                                                 &status);
1166                         up(&dev->lock);
1167                         t->signal =
1168                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1169
1170                         em28xx_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1171                                  t->signal, t->afc);
1172                         return 0;
1173                 }
1174         case VIDIOC_G_FREQUENCY:
1175                 {
1176                         struct v4l2_frequency *f = arg;
1177
1178                         memset(f, 0, sizeof(*f));
1179                         f->type = V4L2_TUNER_ANALOG_TV;
1180                         f->frequency = dev->ctl_freq;
1181
1182                         return 0;
1183                 }
1184         case VIDIOC_S_FREQUENCY:
1185                 {
1186                         struct v4l2_frequency *f = arg;
1187
1188                         if (0 != f->tuner)
1189                                 return -EINVAL;
1190
1191                         if (V4L2_TUNER_ANALOG_TV != f->type)
1192                                 return -EINVAL;
1193
1194                         down(&dev->lock);
1195                         dev->ctl_freq = f->frequency;
1196                         em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1197                         up(&dev->lock);
1198                         return 0;
1199                 }
1200
1201         case VIDIOC_CROPCAP:
1202                 {
1203                         struct v4l2_cropcap *cc = arg;
1204
1205                         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1206                                 return -EINVAL;
1207                         cc->bounds.left = 0;
1208                         cc->bounds.top = 0;
1209                         cc->bounds.width = dev->width;
1210                         cc->bounds.height = dev->height;
1211                         cc->defrect = cc->bounds;
1212                         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1213                         cc->pixelaspect.denominator = 59;
1214                         return 0;
1215                 }
1216         case VIDIOC_STREAMON:
1217                 {
1218                         int *type = arg;
1219
1220                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1221                             || dev->io != IO_MMAP)
1222                                 return -EINVAL;
1223
1224                         if (list_empty(&dev->inqueue))
1225                                 return -EINVAL;
1226
1227                         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1228
1229                         em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1230
1231                         return 0;
1232                 }
1233         case VIDIOC_STREAMOFF:
1234                 {
1235                         int *type = arg;
1236                         int ret;
1237
1238                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1239                             || dev->io != IO_MMAP)
1240                                 return -EINVAL;
1241
1242                         if (dev->stream == STREAM_ON) {
1243                                 em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1244                                 if ((ret = em28xx_stream_interrupt(dev)))
1245                                         return ret;
1246                         }
1247                         em28xx_empty_framequeues(dev);
1248
1249                         return 0;
1250                 }
1251         default:
1252                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1253                                                   driver_ioctl);
1254         }
1255         return 0;
1256 }
1257
1258 /*
1259  * em28xx_v4l2_do_ioctl()
1260  * This function is _not_ called directly, but from
1261  * em28xx_v4l2_ioctl. Userspace
1262  * copying is done already, arg is a kernel pointer.
1263  */
1264 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1265                                  unsigned int cmd, void *arg)
1266 {
1267         struct em28xx *dev = filp->private_data;
1268
1269         if (!dev)
1270                 return -ENODEV;
1271
1272         if (video_debug > 1)
1273                 v4l_print_ioctl(dev->name,cmd);
1274
1275         switch (cmd) {
1276
1277                 /* --- capabilities ------------------------------------------ */
1278         case VIDIOC_QUERYCAP:
1279                 {
1280                         struct v4l2_capability *cap = arg;
1281
1282                         memset(cap, 0, sizeof(*cap));
1283                         strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1284                         strlcpy(cap->card, em28xx_boards[dev->model].name,
1285                                 sizeof(cap->card));
1286                         strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1287                                 sizeof(cap->bus_info));
1288                         cap->version = EM28XX_VERSION_CODE;
1289                         cap->capabilities =
1290                             V4L2_CAP_VIDEO_CAPTURE |
1291                             V4L2_CAP_AUDIO |
1292                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1293                         if (dev->has_tuner)
1294                                 cap->capabilities |= V4L2_CAP_TUNER;
1295                         return 0;
1296                 }
1297
1298                 /* --- capture ioctls ---------------------------------------- */
1299         case VIDIOC_ENUM_FMT:
1300                 {
1301                         struct v4l2_fmtdesc *fmtd = arg;
1302
1303                         if (fmtd->index != 0)
1304                                 return -EINVAL;
1305                         memset(fmtd, 0, sizeof(*fmtd));
1306                         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1307                         strcpy(fmtd->description, "Packed YUY2");
1308                         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1309                         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1310                         return 0;
1311                 }
1312
1313         case VIDIOC_G_FMT:
1314                 {
1315                         struct v4l2_format *format = arg;
1316
1317                         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
1318                                  format->type ==
1319                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1320                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1321                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1322                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1323                                  "not supported");
1324
1325                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1326                                 return -EINVAL;
1327
1328                         format->fmt.pix.width = dev->width;
1329                         format->fmt.pix.height = dev->height;
1330                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1331                         format->fmt.pix.bytesperline = dev->bytesperline;
1332                         format->fmt.pix.sizeimage = dev->frame_size;
1333                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1334                         format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1335
1336                         em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
1337                                  dev->height);
1338                         return 0;
1339                 }
1340
1341         case VIDIOC_TRY_FMT:
1342         case VIDIOC_S_FMT:
1343                 {
1344                         struct v4l2_format *format = arg;
1345                         u32 i;
1346                         int ret = 0;
1347                         int width = format->fmt.pix.width;
1348                         int height = format->fmt.pix.height;
1349                         unsigned int hscale, vscale;
1350                         unsigned int maxh, maxw;
1351
1352                         maxw = norm_maxw(dev);
1353                         maxh = norm_maxh(dev);
1354
1355 /*              int both_fields; */
1356
1357                         em28xx_videodbg("%s: type=%s\n",
1358                                  cmd ==
1359                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1360                                  "VIDIOC_S_FMT",
1361                                  format->type ==
1362                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1363                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1364                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1365                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1366                                  "not supported");
1367
1368                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1369                                 return -EINVAL;
1370
1371                         em28xx_videodbg("%s: requested %dx%d\n",
1372                                  cmd ==
1373                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1374                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1375                                  format->fmt.pix.height);
1376
1377                         /* FIXME: Move some code away from here */
1378                         /* width must even because of the YUYV format */
1379                         /* height must be even because of interlacing */
1380                         height &= 0xfffe;
1381                         width &= 0xfffe;
1382
1383                         if (height < 32)
1384                                 height = 32;
1385                         if (height > maxh)
1386                                 height = maxh;
1387                         if (width < 48)
1388                                 width = 48;
1389                         if (width > maxw)
1390                                 width = maxw;
1391
1392                         if(dev->is_em2800){
1393                                 /* the em2800 can only scale down to 50% */
1394                                 if(height % (maxh / 2))
1395                                         height=maxh;
1396                                 if(width % (maxw / 2))
1397                                         width=maxw;
1398                                 /* according to empiatech support */
1399                                 /* the MaxPacketSize is to small to support */
1400                                 /* framesizes larger than 640x480 @ 30 fps */
1401                                 /* or 640x576 @ 25 fps. As this would cut */
1402                                 /* of a part of the image we prefer */
1403                                 /* 360x576 or 360x480 for now */
1404                                 if(width == maxw && height == maxh)
1405                                         width /= 2;
1406                         }
1407
1408                         if ((hscale =
1409                              (((unsigned long)maxw) << 12) / width - 4096L) >=
1410                             0x4000)
1411                                 hscale = 0x3fff;
1412                         width =
1413                             (((unsigned long)maxw) << 12) / (hscale + 4096L);
1414
1415                         if ((vscale =
1416                              (((unsigned long)maxh) << 12) / height - 4096L) >=
1417                             0x4000)
1418                                 vscale = 0x3fff;
1419                         height =
1420                             (((unsigned long)maxh) << 12) / (vscale + 4096L);
1421
1422                         format->fmt.pix.width = width;
1423                         format->fmt.pix.height = height;
1424                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1425                         format->fmt.pix.bytesperline = width * 2;
1426                         format->fmt.pix.sizeimage = width * 2 * height;
1427                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1428                         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1429
1430                         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
1431                                  cmd ==
1432                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1433                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1434                                  format->fmt.pix.height, hscale, vscale);
1435
1436                         if (cmd == VIDIOC_TRY_FMT)
1437                                 return 0;
1438
1439                         for (i = 0; i < dev->num_frames; i++)
1440                                 if (dev->frame[i].vma_use_count) {
1441                                         em28xx_videodbg("VIDIOC_S_FMT failed. "
1442                                                 "Unmap the buffers first.\n");
1443                                         return -EINVAL;
1444                                 }
1445
1446                         /* stop io in case it is already in progress */
1447                         if (dev->stream == STREAM_ON) {
1448                                 em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
1449                                 if ((ret = em28xx_stream_interrupt(dev)))
1450                                         return ret;
1451                         }
1452
1453                         em28xx_release_buffers(dev);
1454                         dev->io = IO_NONE;
1455
1456                         /* set new image size */
1457                         dev->width = width;
1458                         dev->height = height;
1459                         dev->frame_size = dev->width * dev->height * 2;
1460                         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1461                         dev->bytesperline = dev->width * 2;
1462                         dev->hscale = hscale;
1463                         dev->vscale = vscale;
1464 /*                      dev->both_fileds = both_fileds; */
1465                         em28xx_uninit_isoc(dev);
1466                         em28xx_set_alternate(dev);
1467                         em28xx_capture_start(dev, 1);
1468                         em28xx_resolution_set(dev);
1469                         em28xx_init_isoc(dev);
1470
1471                         return 0;
1472                 }
1473
1474                 /* --- streaming capture ------------------------------------- */
1475         case VIDIOC_REQBUFS:
1476                 {
1477                         struct v4l2_requestbuffers *rb = arg;
1478                         u32 i;
1479                         int ret;
1480
1481                         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1482                             rb->memory != V4L2_MEMORY_MMAP)
1483                                 return -EINVAL;
1484
1485                         if (dev->io == IO_READ) {
1486                                 em28xx_videodbg ("method is set to read;"
1487                                         " close and open the device again to"
1488                                         " choose the mmap I/O method\n");
1489                                 return -EINVAL;
1490                         }
1491
1492                         for (i = 0; i < dev->num_frames; i++)
1493                                 if (dev->frame[i].vma_use_count) {
1494                                         em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1495                                         return -EINVAL;
1496                                 }
1497
1498                         if (dev->stream == STREAM_ON) {
1499                                 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1500                                 if ((ret = em28xx_stream_interrupt(dev)))
1501                                         return ret;
1502                         }
1503
1504                         em28xx_empty_framequeues(dev);
1505
1506                         em28xx_release_buffers(dev);
1507                         if (rb->count)
1508                                 rb->count =
1509                                     em28xx_request_buffers(dev, rb->count);
1510
1511                         dev->frame_current = NULL;
1512
1513                         em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1514                                                      rb->count);
1515                         dev->io = rb->count ? IO_MMAP : IO_NONE;
1516                         return 0;
1517                 }
1518
1519         case VIDIOC_QUERYBUF:
1520                 {
1521                         struct v4l2_buffer *b = arg;
1522
1523                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1524                             b->index >= dev->num_frames || dev->io != IO_MMAP)
1525                                 return -EINVAL;
1526
1527                         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1528
1529                         if (dev->frame[b->index].vma_use_count) {
1530                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1531                         }
1532                         if (dev->frame[b->index].state == F_DONE)
1533                                 b->flags |= V4L2_BUF_FLAG_DONE;
1534                         else if (dev->frame[b->index].state != F_UNUSED)
1535                                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1536                         return 0;
1537                 }
1538         case VIDIOC_QBUF:
1539                 {
1540                         struct v4l2_buffer *b = arg;
1541                         unsigned long lock_flags;
1542
1543                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1544                             b->index >= dev->num_frames || dev->io != IO_MMAP) {
1545                                 return -EINVAL;
1546                         }
1547
1548                         if (dev->frame[b->index].state != F_UNUSED) {
1549                                 return -EAGAIN;
1550                         }
1551                         dev->frame[b->index].state = F_QUEUED;
1552
1553                         /* add frame to fifo */
1554                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1555                         list_add_tail(&dev->frame[b->index].frame,
1556                                       &dev->inqueue);
1557                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1558
1559                         return 0;
1560                 }
1561         case VIDIOC_DQBUF:
1562                 {
1563                         struct v4l2_buffer *b = arg;
1564                         struct em28xx_frame_t *f;
1565                         unsigned long lock_flags;
1566                         int ret = 0;
1567
1568                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1569                             || dev->io != IO_MMAP)
1570                                 return -EINVAL;
1571
1572                         if (list_empty(&dev->outqueue)) {
1573                                 if (dev->stream == STREAM_OFF)
1574                                         return -EINVAL;
1575                                 if (filp->f_flags & O_NONBLOCK)
1576                                         return -EAGAIN;
1577                                 ret = wait_event_interruptible
1578                                     (dev->wait_frame,
1579                                      (!list_empty(&dev->outqueue)) ||
1580                                      (dev->state & DEV_DISCONNECTED));
1581                                 if (ret)
1582                                         return ret;
1583                                 if (dev->state & DEV_DISCONNECTED)
1584                                         return -ENODEV;
1585                         }
1586
1587                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1588                         f = list_entry(dev->outqueue.next,
1589                                        struct em28xx_frame_t, frame);
1590                         list_del(dev->outqueue.next);
1591                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1592
1593                         f->state = F_UNUSED;
1594                         memcpy(b, &f->buf, sizeof(*b));
1595
1596                         if (f->vma_use_count)
1597                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1598
1599                         return 0;
1600                 }
1601         default:
1602                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1603                                        em28xx_video_do_ioctl);
1604         }
1605         return 0;
1606 }
1607
1608 /*
1609  * em28xx_v4l2_ioctl()
1610  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1611  */
1612 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1613                              unsigned int cmd, unsigned long arg)
1614 {
1615         int ret = 0;
1616         struct em28xx *dev = filp->private_data;
1617
1618         if (down_interruptible(&dev->fileop_lock))
1619                 return -ERESTARTSYS;
1620
1621         if (dev->state & DEV_DISCONNECTED) {
1622                 em28xx_errdev("v4l2 ioctl: device not present\n");
1623                 up(&dev->fileop_lock);
1624                 return -ENODEV;
1625         }
1626
1627         if (dev->state & DEV_MISCONFIGURED) {
1628                 em28xx_errdev
1629                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1630                 up(&dev->fileop_lock);
1631                 return -EIO;
1632         }
1633
1634         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1635
1636         up(&dev->fileop_lock);
1637
1638         return ret;
1639 }
1640
1641 static struct file_operations em28xx_v4l_fops = {
1642         .owner = THIS_MODULE,
1643         .open = em28xx_v4l2_open,
1644         .release = em28xx_v4l2_close,
1645         .ioctl = em28xx_v4l2_ioctl,
1646         .read = em28xx_v4l2_read,
1647         .poll = em28xx_v4l2_poll,
1648         .mmap = em28xx_v4l2_mmap,
1649         .llseek = no_llseek,
1650         .compat_ioctl   = v4l_compat_ioctl32,
1651
1652 };
1653
1654 /******************************** usb interface *****************************************/
1655
1656 /*
1657  * em28xx_init_dev()
1658  * allocates and inits the device structs, registers i2c bus and v4l device
1659  */
1660 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1661                            int minor, int model)
1662 {
1663         struct em28xx *dev = *devhandle;
1664         int retval = -ENOMEM;
1665         int errCode, i;
1666         unsigned int maxh, maxw;
1667
1668         dev->udev = udev;
1669         dev->model = model;
1670         init_MUTEX(&dev->lock);
1671         init_waitqueue_head(&dev->open);
1672
1673         dev->em28xx_write_regs = em28xx_write_regs;
1674         dev->em28xx_read_reg = em28xx_read_reg;
1675         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1676         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1677         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1678         dev->is_em2800 = em28xx_boards[model].is_em2800;
1679         dev->has_tuner = em28xx_boards[model].has_tuner;
1680         dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
1681         dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
1682         dev->decoder = em28xx_boards[model].decoder;
1683
1684         if (tuner >= 0)
1685                 dev->tuner_type = tuner;
1686         else
1687                 dev->tuner_type = em28xx_boards[model].tuner_type;
1688
1689         dev->video_inputs = em28xx_boards[model].vchannels;
1690
1691         for (i = 0; i < TVNORMS; i++)
1692                 if (em28xx_boards[model].norm == tvnorms[i].mode)
1693                         break;
1694         if (i == TVNORMS)
1695                 i = 0;
1696
1697         dev->tvnorm = &tvnorms[i];      /* set default norm */
1698
1699         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1700
1701         maxw = norm_maxw(dev);
1702         maxh = norm_maxh(dev);
1703
1704         /* set default image size */
1705         dev->width = maxw;
1706         dev->height = maxh;
1707         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1708         dev->field_size = dev->width * dev->height;
1709         dev->frame_size =
1710             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1711         dev->bytesperline = dev->width * 2;
1712         dev->hscale = 0;
1713         dev->vscale = 0;
1714         dev->ctl_input = 2;
1715
1716         /* setup video picture settings for saa7113h */
1717         memset(&dev->vpic, 0, sizeof(dev->vpic));
1718         dev->vpic.colour = 128 << 8;
1719         dev->vpic.hue = 128 << 8;
1720         dev->vpic.brightness = 128 << 8;
1721         dev->vpic.contrast = 192 << 8;
1722         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1723         dev->vpic.depth = 16;
1724         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1725
1726 #ifdef CONFIG_MODULES
1727         /* request some modules */
1728         if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
1729                 request_module("saa711x");
1730         if (dev->decoder == EM28XX_TVP5150)
1731                 request_module("tvp5150");
1732         if (dev->has_tuner)
1733                 request_module("tuner");
1734         if (dev->tda9887_conf)
1735                 request_module("tda9887");
1736 #endif
1737         errCode = em28xx_config(dev);
1738         if (errCode) {
1739                 em28xx_errdev("error configuring device\n");
1740                 kfree(dev);
1741                 return -ENOMEM;
1742         }
1743
1744         down(&dev->lock);
1745         /* register i2c bus */
1746         em28xx_i2c_register(dev);
1747
1748         /* Do board specific init and eeprom reading */
1749         em28xx_card_setup(dev);
1750
1751         /* configure the device */
1752         em28xx_config_i2c(dev);
1753
1754         up(&dev->lock);
1755
1756         errCode = em28xx_config(dev);
1757
1758 #ifdef CONFIG_MODULES
1759         if (dev->has_msp34xx)
1760                 request_module("msp3400");
1761 #endif
1762         /* allocate and fill v4l2 device struct */
1763         dev->vdev = video_device_alloc();
1764         if (NULL == dev->vdev) {
1765                 em28xx_errdev("cannot allocate video_device.\n");
1766                 kfree(dev);
1767                 return -ENOMEM;
1768         }
1769
1770         dev->vdev->type = VID_TYPE_CAPTURE;
1771         if (dev->has_tuner)
1772                 dev->vdev->type |= VID_TYPE_TUNER;
1773         dev->vdev->hardware = 0;
1774         dev->vdev->fops = &em28xx_v4l_fops;
1775         dev->vdev->minor = -1;
1776         dev->vdev->dev = &dev->udev->dev;
1777         dev->vdev->release = video_device_release;
1778         snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1779                  "em28xx video");
1780         list_add_tail(&dev->devlist,&em28xx_devlist);
1781
1782         /* register v4l2 device */
1783         down(&dev->lock);
1784         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1785                 em28xx_errdev("unable to register video device (error=%i).\n",
1786                               retval);
1787                 up(&dev->lock);
1788                 list_del(&dev->devlist);
1789                 video_device_release(dev->vdev);
1790                 kfree(dev);
1791                 return -ENODEV;
1792         }
1793         if (dev->has_msp34xx) {
1794                 /* Send a reset to other chips via gpio */
1795                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1796                 udelay(2500);
1797                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1798                 udelay(2500);
1799
1800         }
1801         video_mux(dev, 0);
1802
1803         up(&dev->lock);
1804
1805         em28xx_info("V4L2 device registered as /dev/video%d\n",
1806                     dev->vdev->minor);
1807
1808         return 0;
1809 }
1810
1811 /*
1812  * em28xx_usb_probe()
1813  * checks for supported devices
1814  */
1815 static int em28xx_usb_probe(struct usb_interface *interface,
1816                             const struct usb_device_id *id)
1817 {
1818         const struct usb_endpoint_descriptor *endpoint;
1819         struct usb_device *udev;
1820         struct usb_interface *uif;
1821         struct em28xx *dev = NULL;
1822         int retval = -ENODEV;
1823         int model,i,nr,ifnum;
1824
1825         udev = usb_get_dev(interface_to_usbdev(interface));
1826         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1827
1828
1829         /* Don't register audio interfaces */
1830         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1831                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1832                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1833                                 ifnum,
1834                                 interface->altsetting[0].desc.bInterfaceClass);
1835                 return -ENODEV;
1836         }
1837
1838         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1839                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1840                         ifnum,
1841                         interface->altsetting[0].desc.bInterfaceClass);
1842
1843         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1844
1845         /* check if the the device has the iso in endpoint at the correct place */
1846         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1847             USB_ENDPOINT_XFER_ISOC) {
1848                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1849                 return -ENODEV;
1850         }
1851         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1852                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1853                 return -ENODEV;
1854         }
1855
1856         model=id->driver_info;
1857         nr=interface->minor;
1858
1859         if (nr>EM28XX_MAXBOARDS) {
1860                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1861                 return -ENOMEM;
1862         }
1863
1864         /* allocate memory for our device state and initialize it */
1865         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1866         if (dev == NULL) {
1867                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1868                 return -ENOMEM;
1869         }
1870
1871         /* compute alternate max packet sizes */
1872         uif = udev->actconfig->interface[0];
1873
1874         dev->num_alt=uif->num_altsetting;
1875         printk(DRIVER_NAME ": Alternate settings: %i\n",dev->num_alt);
1876 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1877         dev->alt_max_pkt_size = kmalloc(32*
1878                                                 dev->num_alt,GFP_KERNEL);
1879         if (dev->alt_max_pkt_size == NULL) {
1880                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1881                 return -ENOMEM;
1882         }
1883
1884         for (i = 0; i < dev->num_alt ; i++) {
1885                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1886                                                         wMaxPacketSize);
1887                 dev->alt_max_pkt_size[i] =
1888                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1889                 printk(DRIVER_NAME ": Alternate setting %i, max size= %i\n",i,
1890                                                         dev->alt_max_pkt_size[i]);
1891         }
1892
1893         snprintf(dev->name, 29, "em28xx #%d", nr);
1894
1895         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1896                 model=card[nr];
1897
1898         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1899                 printk( "%s: Your board has no eeprom inside it and thus can't\n"
1900                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
1901                         "%s: workaround that.  Redirect complaints to the vendor of\n"
1902                         "%s: the TV card.  Best regards,\n"
1903                         "%s:         -- tux\n",
1904                         dev->name,dev->name,dev->name,dev->name,dev->name);
1905                 printk("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1906                         dev->name);
1907                 for (i = 0; i < em28xx_bcount; i++) {
1908                         printk("%s:    card=%d -> %s\n",
1909                                 dev->name, i, em28xx_boards[i].name);
1910                 }
1911         }
1912
1913         /* allocate device struct */
1914         retval = em28xx_init_dev(&dev, udev, nr, model);
1915         if (retval)
1916                 return retval;
1917
1918         em28xx_info("Found %s\n", em28xx_boards[model].name);
1919
1920         /* save our data pointer in this interface device */
1921         usb_set_intfdata(interface, dev);
1922         return 0;
1923 }
1924
1925 /*
1926  * em28xx_usb_disconnect()
1927  * called when the device gets diconencted
1928  * video device will be unregistered on v4l2_close in case it is still open
1929  */
1930 static void em28xx_usb_disconnect(struct usb_interface *interface)
1931 {
1932         struct em28xx *dev = usb_get_intfdata(interface);
1933         usb_set_intfdata(interface, NULL);
1934
1935 /*FIXME: IR should be disconnected */
1936
1937         if (!dev)
1938                 return;
1939
1940
1941         down_write(&em28xx_disconnect);
1942
1943         down(&dev->lock);
1944
1945         em28xx_info("disconnecting %s\n", dev->vdev->name);
1946
1947         wake_up_interruptible_all(&dev->open);
1948
1949         if (dev->users) {
1950                 em28xx_warn
1951                     ("device /dev/video%d is open! Deregistration and memory "
1952                      "deallocation are deferred on close.\n", dev->vdev->minor);
1953                 dev->state |= DEV_MISCONFIGURED;
1954                 em28xx_uninit_isoc(dev);
1955                 dev->state |= DEV_DISCONNECTED;
1956                 wake_up_interruptible(&dev->wait_frame);
1957                 wake_up_interruptible(&dev->wait_stream);
1958         } else {
1959                 dev->state |= DEV_DISCONNECTED;
1960                 em28xx_release_resources(dev);
1961         }
1962
1963         up(&dev->lock);
1964
1965         if (!dev->users) {
1966                 kfree(dev->alt_max_pkt_size);
1967                 kfree(dev);
1968         }
1969
1970         up_write(&em28xx_disconnect);
1971 }
1972
1973 static struct usb_driver em28xx_usb_driver = {
1974         .name = "em28xx",
1975         .probe = em28xx_usb_probe,
1976         .disconnect = em28xx_usb_disconnect,
1977         .id_table = em28xx_id_table,
1978 };
1979
1980 static int __init em28xx_module_init(void)
1981 {
1982         int result;
1983
1984         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1985                (EM28XX_VERSION_CODE >> 16) & 0xff,
1986                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1987 #ifdef SNAPSHOT
1988         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1989                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1990 #endif
1991
1992         /* register this driver with the USB subsystem */
1993         result = usb_register(&em28xx_usb_driver);
1994         if (result)
1995                 em28xx_err(DRIVER_NAME
1996                            " usb_register failed. Error number %d.\n", result);
1997
1998         return result;
1999 }
2000
2001 static void __exit em28xx_module_exit(void)
2002 {
2003         /* deregister this driver with the USB subsystem */
2004         usb_deregister(&em28xx_usb_driver);
2005 }
2006
2007 module_init(em28xx_module_init);
2008 module_exit(em28xx_module_exit);