err.no Git - linux-2.6/blob - drivers/media/video/em28xx/em28xx-video.c

   1 /*
   2    em2820-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   3
   4    Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
   5                       Ludovico Cavedon <cavedon@sssup.it>
   6                       Mauro Carvalho Chehab <mchehab@brturbo.com.br>
   7
   8    Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/list.h>
  27 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/usb.h>
  30 #include <linux/i2c.h>
  31 #include <linux/video_decoder.h>
  32
  33 #include "em2820.h"
  34 #include <media/tuner.h>
  35
  36 #define DRIVER_AUTHOR "Markus Rechberger <mrechberger@gmail.com>, " \
  37                         "Ludovico Cavedon <cavedon@sssup.it>, " \
  38                         "Mauro Carvalho Chehab <mchehab@brturbo.com.br>"
  39
  40 #define DRIVER_NAME         "em2820"
  41 #define DRIVER_DESC         "Empia em2820 based USB video device driver"
  42 #define EM2820_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  43
  44 #define em2820_videodbg(fmt, arg...) do {\
  45         if (video_debug) \
  46                 printk(KERN_INFO "%s %s :"fmt, \
  47                          dev->name, __FUNCTION__ , ##arg); } while (0)
  48
  49 MODULE_AUTHOR(DRIVER_AUTHOR);
  50 MODULE_DESCRIPTION(DRIVER_DESC);
  51 MODULE_LICENSE("GPL");
  52
  53 static unsigned int card[]  = {[0 ... (EM2820_MAXBOARDS - 1)] = UNSET };
  54
  55 module_param_array(card,  int, NULL, 0444);
  56 MODULE_PARM_DESC(card,"card type");
  57
  58 static int tuner = -1;
  59 module_param(tuner, int, 0444);
  60 MODULE_PARM_DESC(tuner, "tuner type");
  61
  62 static unsigned int video_debug = 0;
  63 module_param(video_debug,int,0644);
  64 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  65
  66 /* supported tv norms */
  67 static struct em2820_tvnorm tvnorms[] = {
  68         {
  69                 .name = "PAL",
  70                 .id = V4L2_STD_PAL,
  71                 .mode = VIDEO_MODE_PAL,
  72          }, {
  73                 .name = "NTSC",
  74                 .id = V4L2_STD_NTSC,
  75                 .mode = VIDEO_MODE_NTSC,
  76         }, {
  77                  .name = "SECAM",
  78                  .id = V4L2_STD_SECAM,
  79                  .mode = VIDEO_MODE_SECAM,
  80         }, {
  81                 .name = "PAL-M",
  82                 .id = V4L2_STD_PAL_M,
  83                 .mode = VIDEO_MODE_PAL,
  84         }
  85 };
  86
  87 #define TVNORMS ARRAY_SIZE(tvnorms)
  88
  89 /* supported controls */
  90 static struct v4l2_queryctrl em2820_qctrl[] = {
  91         {
  92                 .id = V4L2_CID_BRIGHTNESS,
  93                 .type = V4L2_CTRL_TYPE_INTEGER,
  94                 .name = "Brightness",
  95                 .minimum = -128,
  96                 .maximum = 127,
  97                 .step = 1,
  98                 .default_value = 0,
  99                 .flags = 0,
 100         },{
 101                 .id = V4L2_CID_CONTRAST,
 102                 .type = V4L2_CTRL_TYPE_INTEGER,
 103                 .name = "Contrast",
 104                 .minimum = 0x0,
 105                 .maximum = 0x1f,
 106                 .step = 0x1,
 107                 .default_value = 0x10,
 108                 .flags = 0,
 109         },{
 110                 .id = V4L2_CID_SATURATION,
 111                 .type = V4L2_CTRL_TYPE_INTEGER,
 112                 .name = "Saturation",
 113                 .minimum = 0x0,
 114                 .maximum = 0x1f,
 115                 .step = 0x1,
 116                 .default_value = 0x10,
 117                 .flags = 0,
 118         },{
 119                 .id = V4L2_CID_AUDIO_VOLUME,
 120                 .type = V4L2_CTRL_TYPE_INTEGER,
 121                 .name = "Volume",
 122                 .minimum = 0x0,
 123                 .maximum = 0x1f,
 124                 .step = 0x1,
 125                 .default_value = 0x1f,
 126                 .flags = 0,
 127         },{
 128                 .id = V4L2_CID_AUDIO_MUTE,
 129                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 130                 .name = "Mute",
 131                 .minimum = 0,
 132                 .maximum = 1,
 133                 .step = 1,
 134                 .default_value = 1,
 135                 .flags = 0,
 136         },{
 137                 .id = V4L2_CID_RED_BALANCE,
 138                 .type = V4L2_CTRL_TYPE_INTEGER,
 139                 .name = "Red chroma balance",
 140                 .minimum = -128,
 141                 .maximum = 127,
 142                 .step = 1,
 143                 .default_value = 0,
 144                 .flags = 0,
 145         },{
 146                 .id = V4L2_CID_BLUE_BALANCE,
 147                 .type = V4L2_CTRL_TYPE_INTEGER,
 148                 .name = "Blue chroma balance",
 149                 .minimum = -128,
 150                 .maximum = 127,
 151                 .step = 1,
 152                 .default_value = 0,
 153                 .flags = 0,
 154         },{
 155                 .id = V4L2_CID_GAMMA,
 156                 .type = V4L2_CTRL_TYPE_INTEGER,
 157                 .name = "Gamma",
 158                 .minimum = 0x0,
 159                 .maximum = 0x3f,
 160                 .step = 0x1,
 161                 .default_value = 0x20,
 162                 .flags = 0,
 163          }
 164 };
 165
 166 static struct usb_driver em2820_usb_driver;
 167
 168 static DECLARE_MUTEX(em2820_sysfs_lock);
 169 static DECLARE_RWSEM(em2820_disconnect);
 170
 171 /*********************  v4l2 interface  ******************************************/
 172
 173 static inline unsigned long kvirt_to_pa(unsigned long adr)
 174 {
 175         unsigned long kva, ret;
 176
 177         kva = (unsigned long)page_address(vmalloc_to_page((void *)adr));
 178         kva |= adr & (PAGE_SIZE - 1);
 179         ret = __pa(kva);
 180         return ret;
 181 }
 182
 183 /*
 184  * em2820_config()
 185  * inits registers with sane defaults
 186  */
 187 static int em2820_config(struct em2820 *dev)
 188 {
 189
 190         /* Sets I2C speed to 100 KHz */
 191         em2820_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 192
 193         /* enable vbi capturing */
 194         em2820_audio_usb_mute(dev, 1);
 195         dev->mute = 1;          /* maybe not the right place... */
 196         dev->volume = 0x1f;
 197         em2820_audio_analog_set(dev);
 198         em2820_audio_analog_setup(dev);
 199         em2820_outfmt_set_yuv422(dev);
 200         em2820_colorlevels_set_default(dev);
 201         em2820_compression_disable(dev);
 202
 203         return 0;
 204 }
 205
 206 /*
 207  * em2820_config_i2c()
 208  * configure i2c attached devices
 209  */
 210 void em2820_config_i2c(struct em2820 *dev)
 211 {
 212         struct v4l2_frequency f;
 213         struct video_decoder_init em2820_vdi = {.data = NULL };
 214
 215
 216         /* configure decoder */
 217         em2820_i2c_call_clients(dev, DECODER_INIT, &em2820_vdi);
 218         em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
 219 /*      em2820_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
 220 /*      em2820_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
 221 /*      em2820_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
 222 /*      em2820_i2c_call_clients(dev,DECODER_DUMP, NULL); */
 223
 224         /* configure tuner */
 225         f.tuner = 0;
 226         f.type = V4L2_TUNER_ANALOG_TV;
 227         f.frequency = 9076;     /* FIXME:remove magic number */
 228         dev->ctl_freq = f.frequency;
 229         em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 230
 231         /* configure tda9887 */
 232
 233
 234 /*      em2820_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
 235 }
 236
 237 /*
 238  * em2820_empty_framequeues()
 239  * prepare queues for incoming and outgoing frames
 240  */
 241 static void em2820_empty_framequeues(struct em2820 *dev)
 242 {
 243         u32 i;
 244
 245         INIT_LIST_HEAD(&dev->inqueue);
 246         INIT_LIST_HEAD(&dev->outqueue);
 247
 248         for (i = 0; i < EM2820_NUM_FRAMES; i++) {
 249                 dev->frame[i].state = F_UNUSED;
 250                 dev->frame[i].buf.bytesused = 0;
 251         }
 252 }
 253
 254 /*
 255  * em2820_v4l2_open()
 256  * inits the device and starts isoc transfer
 257  */
 258 static int em2820_v4l2_open(struct inode *inode, struct file *filp)
 259 {
 260         struct video_device *vdev = video_devdata(filp);
 261         int minor = iminor(inode);
 262         struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev);
 263         int errCode = 0;
 264
 265         em2820_videodbg("users=%d", dev->users);
 266
 267         if (!down_read_trylock(&em2820_disconnect))
 268                 return -ERESTARTSYS;
 269
 270         if (dev->users) {
 271                 em2820_warn("this driver can be opened only once\n");
 272                 up_read(&em2820_disconnect);
 273                 return -EBUSY;
 274         }
 275
 276 /*      if(dev->vbi_dev->minor == minor){
 277                 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
 278         }*/
 279         if (dev->vdev->minor == minor) {
 280                 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 281         }
 282
 283         init_MUTEX(&dev->fileop_lock);  /* to 1 == available */
 284         spin_lock_init(&dev->queue_lock);
 285         init_waitqueue_head(&dev->wait_frame);
 286         init_waitqueue_head(&dev->wait_stream);
 287
 288         down(&dev->lock);
 289
 290         em2820_set_alternate(dev);
 291
 292         dev->width = norm_maxw(dev);
 293         dev->height = norm_maxh(dev);
 294         dev->frame_size = dev->width * dev->height * 2;
 295         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 296         dev->bytesperline = dev->width * 2;
 297         dev->hscale = 0;
 298         dev->vscale = 0;
 299
 300         em2820_capture_start(dev, 1);
 301         em2820_resolution_set(dev);
 302
 303         /* start the transfer */
 304         errCode = em2820_init_isoc(dev);
 305         if (errCode)
 306                 goto err;
 307
 308         dev->users++;
 309         filp->private_data = dev;
 310         dev->io = IO_NONE;
 311         dev->stream = STREAM_OFF;
 312         dev->num_frames = 0;
 313
 314         /* prepare queues */
 315         em2820_empty_framequeues(dev);
 316
 317         dev->state |= DEV_INITIALIZED;
 318
 319       err:
 320         up(&dev->lock);
 321         up_read(&em2820_disconnect);
 322         return errCode;
 323 }
 324
 325 /*
 326  * em2820_realease_resources()
 327  * unregisters the v4l2,i2c and usb devices
 328  * called when the device gets disconected or at module unload
 329 */
 330 static void em2820_release_resources(struct em2820 *dev)
 331 {
 332         down(&em2820_sysfs_lock);
 333
 334         em2820_info("V4L2 device /dev/video%d deregistered\n",
 335                     dev->vdev->minor);
 336         video_set_drvdata(dev->vdev, NULL);
 337         video_unregister_device(dev->vdev);
 338 /*      video_unregister_device(dev->vbi_dev); */
 339         em2820_i2c_unregister(dev);
 340         usb_put_dev(dev->udev);
 341         up(&em2820_sysfs_lock);
 342 }
 343
 344 /*
 345  * em2820_v4l2_close()
 346  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 347  */
 348 static int em2820_v4l2_close(struct inode *inode, struct file *file)
 349 {
 350         struct video_device *vdev = video_devdata(file);
 351         struct em2820 *dev = (struct em2820 *)video_get_drvdata(vdev);
 352         int errCode;
 353
 354         em2820_videodbg("users=%d", dev->users);
 355
 356         down(&dev->lock);
 357
 358         em2820_uninit_isoc(dev);
 359
 360         em2820_release_buffers(dev);
 361
 362         /* the device is already disconnect, free the remaining resources */
 363         if (dev->state & DEV_DISCONNECTED) {
 364                 em2820_release_resources(dev);
 365                 up(&dev->lock);
 366                 kfree(dev);
 367                 return 0;
 368         }
 369
 370         /* set alternate 0 */
 371         dev->alt = 0;
 372         em2820_videodbg("setting alternate 0");
 373         errCode = usb_set_interface(dev->udev, 0, 0);
 374         if (errCode < 0) {
 375                 em2820_errdev ("cannot change alternate number to 0 (error=%i)\n",
 376                      errCode);
 377         }
 378
 379         dev->users--;
 380         wake_up_interruptible_nr(&dev->open, 1);
 381         up(&dev->lock);
 382         return 0;
 383 }
 384
 385 /*
 386  * em2820_v4l2_read()
 387  * will allocate buffers when called for the first time
 388  */
 389 static ssize_t
 390 em2820_v4l2_read(struct file *filp, char __user * buf, size_t count,
 391                  loff_t * f_pos)
 392 {
 393         struct em2820 *dev = video_get_drvdata(video_devdata(filp));
 394         struct em2820_frame_t *f, *i;
 395         unsigned long lock_flags;
 396         int ret = 0;
 397
 398         if (down_interruptible(&dev->fileop_lock))
 399                 return -ERESTARTSYS;
 400
 401         if (dev->state & DEV_DISCONNECTED) {
 402                 em2820_videodbg("device not present");
 403                 up(&dev->fileop_lock);
 404                 return -ENODEV;
 405         }
 406
 407         if (dev->state & DEV_MISCONFIGURED) {
 408                 em2820_videodbg("device misconfigured; close and open it again");
 409                 up(&dev->fileop_lock);
 410                 return -EIO;
 411         }
 412
 413         if (dev->io == IO_MMAP) {
 414                 em2820_videodbg ("IO method is set to mmap; close and open"
 415                                 " the device again to choose the read method");
 416                 up(&dev->fileop_lock);
 417                 return -EINVAL;
 418         }
 419
 420         if (dev->io == IO_NONE) {
 421                 if (!em2820_request_buffers(dev, EM2820_NUM_READ_FRAMES)) {
 422                         em2820_errdev("read failed, not enough memory\n");
 423                         up(&dev->fileop_lock);
 424                         return -ENOMEM;
 425                 }
 426                 dev->io = IO_READ;
 427                 dev->stream = STREAM_ON;
 428                 em2820_queue_unusedframes(dev);
 429         }
 430
 431         if (!count) {
 432                 up(&dev->fileop_lock);
 433                 return 0;
 434         }
 435
 436         if (list_empty(&dev->outqueue)) {
 437                 if (filp->f_flags & O_NONBLOCK) {
 438                         up(&dev->fileop_lock);
 439                         return -EAGAIN;
 440                 }
 441                 ret = wait_event_interruptible
 442                     (dev->wait_frame,
 443                      (!list_empty(&dev->outqueue)) ||
 444                      (dev->state & DEV_DISCONNECTED));
 445                 if (ret) {
 446                         up(&dev->fileop_lock);
 447                         return ret;
 448                 }
 449                 if (dev->state & DEV_DISCONNECTED) {
 450                         up(&dev->fileop_lock);
 451                         return -ENODEV;
 452                 }
 453         }
 454
 455         f = list_entry(dev->outqueue.prev, struct em2820_frame_t, frame);
 456
 457         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 458         list_for_each_entry(i, &dev->outqueue, frame)
 459             i->state = F_UNUSED;
 460         INIT_LIST_HEAD(&dev->outqueue);
 461         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 462
 463         em2820_queue_unusedframes(dev);
 464
 465         if (count > f->buf.length)
 466                 count = f->buf.length;
 467
 468         if (copy_to_user(buf, f->bufmem, count)) {
 469                 up(&dev->fileop_lock);
 470                 return -EFAULT;
 471         }
 472         *f_pos += count;
 473
 474         up(&dev->fileop_lock);
 475
 476         return count;
 477 }
 478
 479 /*
 480  * em2820_v4l2_poll()
 481  * will allocate buffers when called for the first time
 482  */
 483 static unsigned int em2820_v4l2_poll(struct file *filp, poll_table * wait)
 484 {
 485         struct em2820 *dev = video_get_drvdata(video_devdata(filp));
 486         unsigned int mask = 0;
 487
 488         if (down_interruptible(&dev->fileop_lock))
 489                 return POLLERR;
 490
 491         if (dev->state & DEV_DISCONNECTED) {
 492                 em2820_videodbg("device not present");
 493         } else if (dev->state & DEV_MISCONFIGURED) {
 494                 em2820_videodbg("device is misconfigured; close and open it again");
 495         } else {
 496                 if (dev->io == IO_NONE) {
 497                         if (!em2820_request_buffers
 498                             (dev, EM2820_NUM_READ_FRAMES)) {
 499                                 em2820_warn
 500                                     ("poll() failed, not enough memory\n");
 501                         } else {
 502                                 dev->io = IO_READ;
 503                                 dev->stream = STREAM_ON;
 504                         }
 505                 }
 506
 507                 if (dev->io == IO_READ) {
 508                         em2820_queue_unusedframes(dev);
 509                         poll_wait(filp, &dev->wait_frame, wait);
 510
 511                         if (!list_empty(&dev->outqueue))
 512                                 mask |= POLLIN | POLLRDNORM;
 513
 514                         up(&dev->fileop_lock);
 515
 516                         return mask;
 517                 }
 518         }
 519
 520         up(&dev->fileop_lock);
 521         return POLLERR;
 522 }
 523
 524 /*
 525  * em2820_vm_open()
 526  */
 527 static void em2820_vm_open(struct vm_area_struct *vma)
 528 {
 529         struct em2820_frame_t *f = vma->vm_private_data;
 530         f->vma_use_count++;
 531 }
 532
 533 /*
 534  * em2820_vm_close()
 535  */
 536 static void em2820_vm_close(struct vm_area_struct *vma)
 537 {
 538         /* NOTE: buffers are not freed here */
 539         struct em2820_frame_t *f = vma->vm_private_data;
 540         f->vma_use_count--;
 541 }
 542
 543 static struct vm_operations_struct em2820_vm_ops = {
 544         .open = em2820_vm_open,
 545         .close = em2820_vm_close,
 546 };
 547
 548 /*
 549  * em2820_v4l2_mmap()
 550  */
 551 static int em2820_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 552 {
 553         struct em2820 *dev = video_get_drvdata(video_devdata(filp));
 554         unsigned long size = vma->vm_end - vma->vm_start,
 555             start = vma->vm_start, pos, page;
 556         u32 i;
 557         if (down_interruptible(&dev->fileop_lock))
 558                 return -ERESTARTSYS;
 559
 560         if (dev->state & DEV_DISCONNECTED) {
 561                 em2820_videodbg("mmap: device not present");
 562                 up(&dev->fileop_lock);
 563                 return -ENODEV;
 564         }
 565
 566         if (dev->state & DEV_MISCONFIGURED) {
 567                 em2820_videodbg ("mmap: Device is misconfigured; close and "
 568                                                 "open it again");
 569                 up(&dev->fileop_lock);
 570                 return -EIO;
 571         }
 572
 573         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 574             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 575                 up(&dev->fileop_lock);
 576                 return -EINVAL;
 577         }
 578
 579         for (i = 0; i < dev->num_frames; i++) {
 580                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 581                         break;
 582         }
 583         if (i == dev->num_frames) {
 584                 em2820_videodbg("mmap: user supplied mapping address is out of range");
 585                 up(&dev->fileop_lock);
 586                 return -EINVAL;
 587         }
 588
 589         /* VM_IO is eventually going to replace PageReserved altogether */
 590         vma->vm_flags |= VM_IO;
 591         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 592
 593         pos = (unsigned long)dev->frame[i].bufmem;
 594         while (size > 0) {      /* size is page-aligned */
 595                 page = vmalloc_to_pfn((void *)pos);
 596                 if (remap_pfn_range(vma, start, page, PAGE_SIZE,
 597                                     vma->vm_page_prot)) {
 598                         em2820_videodbg("mmap: rename page map failed");
 599                         up(&dev->fileop_lock);
 600                         return -EAGAIN;
 601                 }
 602                 start += PAGE_SIZE;
 603                 pos += PAGE_SIZE;
 604                 size -= PAGE_SIZE;
 605         }
 606
 607         vma->vm_ops = &em2820_vm_ops;
 608         vma->vm_private_data = &dev->frame[i];
 609
 610         em2820_vm_open(vma);
 611         up(&dev->fileop_lock);
 612         return 0;
 613 }
 614
 615 /*
 616  * em2820_get_ctrl()
 617  * return the current saturation, brightness or contrast, mute state
 618  */
 619 static int em2820_get_ctrl(struct em2820 *dev, struct v4l2_control *ctrl)
 620 {
 621         s32 tmp;
 622         switch (ctrl->id) {
 623         case V4L2_CID_AUDIO_MUTE:
 624                 ctrl->value = dev->mute;
 625                 return 0;
 626         case V4L2_CID_AUDIO_VOLUME:
 627                 ctrl->value = dev->volume;
 628                 return 0;
 629         case V4L2_CID_BRIGHTNESS:
 630                 if ((tmp = em2820_brightness_get(dev)) < 0)
 631                         return -EIO;
 632                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 633                 return 0;
 634         case V4L2_CID_CONTRAST:
 635                 if ((ctrl->value = em2820_contrast_get(dev)) < 0)
 636                         return -EIO;
 637                 return 0;
 638         case V4L2_CID_SATURATION:
 639                 if ((ctrl->value = em2820_saturation_get(dev)) < 0)
 640                         return -EIO;
 641                 return 0;
 642         case V4L2_CID_RED_BALANCE:
 643                 if ((tmp = em2820_v_balance_get(dev)) < 0)
 644                         return -EIO;
 645                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 646                 return 0;
 647         case V4L2_CID_BLUE_BALANCE:
 648                 if ((tmp = em2820_u_balance_get(dev)) < 0)
 649                         return -EIO;
 650                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 651                 return 0;
 652         case V4L2_CID_GAMMA:
 653                 if ((ctrl->value = em2820_gamma_get(dev)) < 0)
 654                         return -EIO;
 655                 return 0;
 656         default:
 657                 return -EINVAL;
 658         }
 659 }
 660
 661 /*
 662  * em2820_set_ctrl()
 663  * mute or set new saturation, brightness or contrast
 664  */
 665 static int em2820_set_ctrl(struct em2820 *dev, const struct v4l2_control *ctrl)
 666 {
 667         switch (ctrl->id) {
 668         case V4L2_CID_AUDIO_MUTE:
 669                 if (ctrl->value != dev->mute) {
 670                         dev->mute = ctrl->value;
 671                         em2820_audio_usb_mute(dev, ctrl->value);
 672                         return em2820_audio_analog_set(dev);
 673                 }
 674                 return 0;
 675         case V4L2_CID_AUDIO_VOLUME:
 676                 dev->volume = ctrl->value;
 677                 return em2820_audio_analog_set(dev);
 678         case V4L2_CID_BRIGHTNESS:
 679                 return em2820_brightness_set(dev, ctrl->value);
 680         case V4L2_CID_CONTRAST:
 681                 return em2820_contrast_set(dev, ctrl->value);
 682         case V4L2_CID_SATURATION:
 683                 return em2820_saturation_set(dev, ctrl->value);
 684         case V4L2_CID_RED_BALANCE:
 685                 return em2820_v_balance_set(dev, ctrl->value);
 686         case V4L2_CID_BLUE_BALANCE:
 687                 return em2820_u_balance_set(dev, ctrl->value);
 688         case V4L2_CID_GAMMA:
 689                 return em2820_gamma_set(dev, ctrl->value);
 690         default:
 691                 return -EINVAL;
 692         }
 693 }
 694
 695 /*
 696  * em2820_stream_interrupt()
 697  * stops streaming
 698  */
 699 static int em2820_stream_interrupt(struct em2820 *dev)
 700 {
 701         int ret = 0;
 702
 703         /* stop reading from the device */
 704
 705         dev->stream = STREAM_INTERRUPT;
 706         ret = wait_event_timeout(dev->wait_stream,
 707                                  (dev->stream == STREAM_OFF) ||
 708                                  (dev->state & DEV_DISCONNECTED),
 709                                  EM2820_URB_TIMEOUT);
 710         if (dev->state & DEV_DISCONNECTED)
 711                 return -ENODEV;
 712         else if (ret) {
 713                 dev->state |= DEV_MISCONFIGURED;
 714                 em2820_videodbg("device is misconfigured; close and "
 715                         "open /dev/video%d again", dev->vdev->minor);
 716                 return ret;
 717         }
 718
 719         return 0;
 720 }
 721
 722 static int em2820_set_norm(struct em2820 *dev, int width, int height)
 723 {
 724         unsigned int hscale, vscale;
 725         unsigned int maxh, maxw;
 726
 727         maxw = norm_maxw(dev);
 728         maxh = norm_maxh(dev);
 729
 730         /* width must even because of the YUYV format */
 731         /* height must be even because of interlacing */
 732         height &= 0xfffe;
 733         width &= 0xfffe;
 734
 735         if (height < 32)
 736                 height = 32;
 737         if (height > maxh)
 738                 height = maxh;
 739         if (width < 48)
 740                 width = 48;
 741         if (width > maxw)
 742                 width = maxw;
 743
 744         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 745                 hscale = 0x3fff;
 746         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 747
 748         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 749                 vscale = 0x3fff;
 750         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 751
 752         /* set new image size */
 753         dev->width = width;
 754         dev->height = height;
 755         dev->frame_size = dev->width * dev->height * 2;
 756         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 757         dev->bytesperline = dev->width * 2;
 758         dev->hscale = hscale;
 759         dev->vscale = vscale;
 760
 761         em2820_resolution_set(dev);
 762
 763         return 0;
 764 }
 765
 766 static void video_mux(struct em2820 *dev, int index)
 767 {
 768         int input, ainput;
 769
 770         input = INPUT(index)->vmux;
 771         dev->ctl_input = index;
 772
 773         em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
 774
 775         dev->ctl_ainput = INPUT(index)->amux;
 776
 777         switch (dev->ctl_ainput) {
 778         case 0:
 779                 ainput = EM2820_AUDIO_SRC_TUNER;
 780                 break;
 781         default:
 782                 ainput = EM2820_AUDIO_SRC_LINE;
 783         }
 784
 785         em2820_audio_source(dev, ainput);
 786 }
 787
 788 /*
 789  * em2820_v4l2_do_ioctl()
 790  * This function is _not_ called directly, but from
 791  * em2820_v4l2_ioctl. Userspace
 792  * copying is done already, arg is a kernel pointer.
 793  */
 794 static int em2820_do_ioctl(struct inode *inode, struct file *filp,
 795                            struct em2820 *dev, unsigned int cmd, void *arg,
 796                            v4l2_kioctl driver_ioctl)
 797 {
 798         int ret;
 799
 800         switch (cmd) {
 801                 /* ---------- tv norms ---------- */
 802         case VIDIOC_ENUMSTD:
 803                 {
 804                         struct v4l2_standard *e = arg;
 805                         unsigned int i;
 806
 807                         i = e->index;
 808                         if (i >= TVNORMS)
 809                                 return -EINVAL;
 810                         ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 811                                                        tvnorms[e->index].name);
 812                         e->index = i;
 813                         if (ret < 0)
 814                                 return ret;
 815                         return 0;
 816                 }
 817         case VIDIOC_G_STD:
 818                 {
 819                         v4l2_std_id *id = arg;
 820
 821                         *id = dev->tvnorm->id;
 822                         return 0;
 823                 }
 824         case VIDIOC_S_STD:
 825                 {
 826                         v4l2_std_id *id = arg;
 827                         unsigned int i;
 828
 829                         for (i = 0; i < TVNORMS; i++)
 830                                 if (*id == tvnorms[i].id)
 831                                         break;
 832                         if (i == TVNORMS)
 833                                 for (i = 0; i < TVNORMS; i++)
 834                                         if (*id & tvnorms[i].id)
 835                                                 break;
 836                         if (i == TVNORMS)
 837                                 return -EINVAL;
 838
 839                         down(&dev->lock);
 840                         dev->tvnorm = &tvnorms[i];
 841
 842                         em2820_set_norm(dev, dev->width, dev->height);
 843
 844 /*
 845                 dev->width=norm_maxw(dev);
 846                 dev->height=norm_maxh(dev);
 847                 dev->frame_size=dev->width*dev->height*2;
 848                 dev->field_size=dev->frame_size>>1;
 849                 dev->bytesperline=dev->width*2;
 850                 dev->hscale=0;
 851                 dev->vscale=0;
 852
 853                 em2820_resolution_set(dev);
 854 */
 855 /*
 856                 em2820_uninit_isoc(dev);
 857                 em2820_set_alternate(dev);
 858                 em2820_capture_start(dev, 1);
 859                 em2820_resolution_set(dev);
 860                 em2820_init_isoc(dev);
 861 */
 862                         em2820_i2c_call_clients(dev, DECODER_SET_NORM,
 863                                                 &tvnorms[i].mode);
 864                         em2820_i2c_call_clients(dev, VIDIOC_S_STD,
 865                                                 &dev->tvnorm->id);
 866
 867                         up(&dev->lock);
 868
 869                         return 0;
 870                 }
 871
 872                 /* ------ input switching ---------- */
 873         case VIDIOC_ENUMINPUT:
 874                 {
 875                         struct v4l2_input *i = arg;
 876                         unsigned int n;
 877                         static const char *iname[] = {
 878                                 [EM2820_VMUX_COMPOSITE1] = "Composite1",
 879                                 [EM2820_VMUX_COMPOSITE2] = "Composite2",
 880                                 [EM2820_VMUX_COMPOSITE3] = "Composite3",
 881                                 [EM2820_VMUX_COMPOSITE4] = "Composite4",
 882                                 [EM2820_VMUX_SVIDEO] = "S-Video",
 883                                 [EM2820_VMUX_TELEVISION] = "Television",
 884                                 [EM2820_VMUX_CABLE] = "Cable TV",
 885                                 [EM2820_VMUX_DVB] = "DVB",
 886                                 [EM2820_VMUX_DEBUG] = "for debug only",
 887                         };
 888
 889                         n = i->index;
 890                         if (n >= MAX_EM2820_INPUT)
 891                                 return -EINVAL;
 892                         if (0 == INPUT(n)->type)
 893                                 return -EINVAL;
 894                         memset(i, 0, sizeof(*i));
 895                         i->index = n;
 896                         i->type = V4L2_INPUT_TYPE_CAMERA;
 897                         strcpy(i->name, iname[INPUT(n)->type]);
 898                         if ((EM2820_VMUX_TELEVISION == INPUT(n)->type) ||
 899                             (EM2820_VMUX_CABLE == INPUT(n)->type))
 900                                 i->type = V4L2_INPUT_TYPE_TUNER;
 901                         for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
 902                                 i->std |= tvnorms[n].id;
 903                         return 0;
 904                 }
 905
 906         case VIDIOC_G_INPUT:
 907                 {
 908                         int *i = arg;
 909                         *i = dev->ctl_input;
 910
 911                         return 0;
 912                 }
 913
 914         case VIDIOC_S_INPUT:
 915                 {
 916                         int *index = arg;
 917
 918                         if (*index >= MAX_EM2820_INPUT)
 919                                 return -EINVAL;
 920                         if (0 == INPUT(*index)->type)
 921                                 return -EINVAL;
 922
 923                         down(&dev->lock);
 924                         video_mux(dev, *index);
 925                         up(&dev->lock);
 926
 927                         return 0;
 928                 }
 929
 930         case VIDIOC_G_AUDIO:
 931                 {
 932                         struct v4l2_audio *a = arg;
 933                         unsigned int index = a->index;
 934
 935                         if (a->index > 1)
 936                                 return -EINVAL;
 937                         memset(a, 0, sizeof(*a));
 938                         index = dev->ctl_ainput;
 939
 940                         if (index == 0) {
 941                                 strcpy(a->name, "Television");
 942                         } else {
 943                                 strcpy(a->name, "Line In");
 944                         }
 945                         a->capability = V4L2_AUDCAP_STEREO;
 946                         a->index = index;
 947                         return 0;
 948                 }
 949
 950         case VIDIOC_S_AUDIO:
 951                 {
 952                         struct v4l2_audio *a = arg;
 953                         if (a->index != dev->ctl_ainput)
 954                                 return -EINVAL;
 955
 956                         return 0;
 957                 }
 958
 959                 /* --- controls ---------------------------------------------- */
 960         case VIDIOC_QUERYCTRL:
 961                 {
 962                         struct v4l2_queryctrl *qc = arg;
 963                         u8 i, n;
 964                         n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
 965                         for (i = 0; i < n; i++)
 966                                 if (qc->id && qc->id == em2820_qctrl[i].id) {
 967                                         memcpy(qc, &(em2820_qctrl[i]),
 968                                                sizeof(*qc));
 969                                         return 0;
 970                                 }
 971
 972                         return -EINVAL;
 973                 }
 974
 975         case VIDIOC_G_CTRL:
 976                 {
 977                         struct v4l2_control *ctrl = arg;
 978
 979
 980                         return em2820_get_ctrl(dev, ctrl);
 981                 }
 982
 983         case VIDIOC_S_CTRL_OLD: /* ??? */
 984         case VIDIOC_S_CTRL:
 985                 {
 986                         struct v4l2_control *ctrl = arg;
 987                         u8 i, n;
 988
 989
 990                         n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
 991                         for (i = 0; i < n; i++)
 992                                 if (ctrl->id == em2820_qctrl[i].id) {
 993                                         if (ctrl->value <
 994                                             em2820_qctrl[i].minimum
 995                                             || ctrl->value >
 996                                             em2820_qctrl[i].maximum)
 997                                                 return -ERANGE;
 998
 999                                         return em2820_set_ctrl(dev, ctrl);
1000                                 }
1001                         return -EINVAL;
1002                 }
1003
1004                 /* --- tuner ioctls ------------------------------------------ */
1005         case VIDIOC_G_TUNER:
1006                 {
1007                         struct v4l2_tuner *t = arg;
1008                         int status = 0;
1009
1010                         if (0 != t->index)
1011                                 return -EINVAL;
1012
1013                         memset(t, 0, sizeof(*t));
1014                         strcpy(t->name, "Tuner");
1015                         t->type = V4L2_TUNER_ANALOG_TV;
1016                         t->capability = V4L2_TUNER_CAP_NORM;
1017                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1018 /*              t->signal = 0xffff;*/
1019 /*              em2820_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1020                         /* No way to get signal strength? */
1021                         down(&dev->lock);
1022                         em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
1023                                                 &status);
1024                         up(&dev->lock);
1025                         t->signal =
1026                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1027
1028                         em2820_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x", t->signal,
1029                                  t->afc);
1030                         return 0;
1031                 }
1032         case VIDIOC_S_TUNER:
1033                 {
1034                         struct v4l2_tuner *t = arg;
1035                         int status = 0;
1036
1037                         if (0 != t->index)
1038                                 return -EINVAL;
1039                         memset(t, 0, sizeof(*t));
1040                         strcpy(t->name, "Tuner");
1041                         t->type = V4L2_TUNER_ANALOG_TV;
1042                         t->capability = V4L2_TUNER_CAP_NORM;
1043                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1044 /*              t->signal = 0xffff; */
1045                         /* No way to get signal strength? */
1046                         down(&dev->lock);
1047                         em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
1048                                                 &status);
1049                         up(&dev->lock);
1050                         t->signal =
1051                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1052
1053                         em2820_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1054                                  t->signal, t->afc);
1055                         return 0;
1056                 }
1057         case VIDIOC_G_FREQUENCY:
1058                 {
1059                         struct v4l2_frequency *f = arg;
1060
1061                         memset(f, 0, sizeof(*f));
1062                         f->type = V4L2_TUNER_ANALOG_TV;
1063                         f->frequency = dev->ctl_freq;
1064
1065                         return 0;
1066                 }
1067         case VIDIOC_S_FREQUENCY:
1068                 {
1069                         struct v4l2_frequency *f = arg;
1070
1071                         if (0 != f->tuner)
1072                                 return -EINVAL;
1073
1074                         if (V4L2_TUNER_ANALOG_TV != f->type)
1075                                 return -EINVAL;
1076
1077                         down(&dev->lock);
1078                         dev->ctl_freq = f->frequency;
1079                         em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1080                         up(&dev->lock);
1081                         return 0;
1082                 }
1083
1084         case VIDIOC_CROPCAP:
1085                 {
1086                         struct v4l2_cropcap *cc = arg;
1087
1088                         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1089                                 return -EINVAL;
1090                         cc->bounds.left = 0;
1091                         cc->bounds.top = 0;
1092                         cc->bounds.width = dev->width;
1093                         cc->bounds.height = dev->height;
1094                         cc->defrect = cc->bounds;
1095                         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1096                         cc->pixelaspect.denominator = 59;
1097                         return 0;
1098                 }
1099         case VIDIOC_STREAMON:
1100                 {
1101                         int *type = arg;
1102
1103                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1104                             || dev->io != IO_MMAP)
1105                                 return -EINVAL;
1106
1107                         if (list_empty(&dev->inqueue))
1108                                 return -EINVAL;
1109
1110                         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1111
1112                         em2820_videodbg("VIDIOC_STREAMON: starting stream");
1113
1114                         return 0;
1115                 }
1116         case VIDIOC_STREAMOFF:
1117                 {
1118                         int *type = arg;
1119                         int ret;
1120
1121                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1122                             || dev->io != IO_MMAP)
1123                                 return -EINVAL;
1124
1125                         if (dev->stream == STREAM_ON) {
1126                                 em2820_videodbg ("VIDIOC_STREAMOFF: interrupting stream");
1127                                 if ((ret = em2820_stream_interrupt(dev)))
1128                                         return ret;
1129                         }
1130                         em2820_empty_framequeues(dev);
1131
1132                         return 0;
1133                 }
1134         default:
1135                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1136                                                   driver_ioctl);
1137         }
1138         return 0;
1139 }
1140
1141 /*
1142  * em2820_v4l2_do_ioctl()
1143  * This function is _not_ called directly, but from
1144  * em2820_v4l2_ioctl. Userspace
1145  * copying is done already, arg is a kernel pointer.
1146  */
1147 static int em2820_video_do_ioctl(struct inode *inode, struct file *filp,
1148                                  unsigned int cmd, void *arg)
1149 {
1150         struct em2820 *dev = filp->private_data;
1151
1152         if (!dev)
1153                 return -ENODEV;
1154
1155         if (video_debug > 1)
1156                 em2820_print_ioctl(dev->name,cmd);
1157
1158         switch (cmd) {
1159
1160                 /* --- capabilities ------------------------------------------ */
1161         case VIDIOC_QUERYCAP:
1162                 {
1163                         struct v4l2_capability *cap = arg;
1164
1165                         memset(cap, 0, sizeof(*cap));
1166                         strlcpy(cap->driver, "em2820", sizeof(cap->driver));
1167                         strlcpy(cap->card, em2820_boards[dev->model].name,
1168                                 sizeof(cap->card));
1169                         strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1170                                 sizeof(cap->bus_info));
1171                         cap->version = EM2820_VERSION_CODE;
1172                         cap->capabilities =
1173                             V4L2_CAP_VIDEO_CAPTURE |
1174                             V4L2_CAP_AUDIO |
1175                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1176                         if (dev->has_tuner)
1177                                 cap->capabilities |= V4L2_CAP_TUNER;
1178                         return 0;
1179                 }
1180
1181                 /* --- capture ioctls ---------------------------------------- */
1182         case VIDIOC_ENUM_FMT:
1183                 {
1184                         struct v4l2_fmtdesc *fmtd = arg;
1185
1186                         if (fmtd->index != 0)
1187                                 return -EINVAL;
1188                         memset(fmtd, 0, sizeof(*fmtd));
1189                         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1190                         strcpy(fmtd->description, "Packed YUY2");
1191                         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1192                         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1193                         return 0;
1194                 }
1195
1196         case VIDIOC_G_FMT:
1197                 {
1198                         struct v4l2_format *format = arg;
1199
1200                         em2820_videodbg("VIDIOC_G_FMT: type=%s",
1201                                  format->type ==
1202                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1203                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1204                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1205                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1206                                  "not supported");
1207
1208                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1209                                 return -EINVAL;
1210
1211                         format->fmt.pix.width = dev->width;
1212                         format->fmt.pix.height = dev->height;
1213                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1214                         format->fmt.pix.bytesperline = dev->bytesperline;
1215                         format->fmt.pix.sizeimage = dev->frame_size;
1216                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1217                         format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1218
1219                         em2820_videodbg("VIDIOC_G_FMT: %dx%d", dev->width,
1220                                  dev->height);
1221                         return 0;
1222                 }
1223
1224         case VIDIOC_TRY_FMT:
1225         case VIDIOC_S_FMT:
1226                 {
1227                         struct v4l2_format *format = arg;
1228                         u32 i;
1229                         int ret = 0;
1230                         int width = format->fmt.pix.width;
1231                         int height = format->fmt.pix.height;
1232                         unsigned int hscale, vscale;
1233                         unsigned int maxh, maxw;
1234
1235                         maxw = norm_maxw(dev);
1236                         maxh = norm_maxh(dev);
1237
1238 /*              int both_fields; */
1239
1240                         em2820_videodbg("%s: type=%s",
1241                                  cmd ==
1242                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1243                                  "VIDIOC_S_FMT",
1244                                  format->type ==
1245                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1246                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1247                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1248                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1249                                  "not supported");
1250
1251                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1252                                 return -EINVAL;
1253
1254                         em2820_videodbg("%s: requested %dx%d",
1255                                  cmd ==
1256                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1257                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1258                                  format->fmt.pix.height);
1259
1260                         /* FIXME: Move some code away from here */
1261                         /* width must even because of the YUYV format */
1262                         /* height must be even because of interlacing */
1263                         height &= 0xfffe;
1264                         width &= 0xfffe;
1265
1266                         if (height < 32)
1267                                 height = 32;
1268                         if (height > maxh)
1269                                 height = maxh;
1270                         if (width < 48)
1271                                 width = 48;
1272                         if (width > maxw)
1273                                 width = maxw;
1274
1275                         /* FIXME*/
1276                         if(dev->is_em2800){
1277                                 /* we only know how to scale to 50% */
1278                                 if(height % (maxh / 2))
1279                                         height=maxh;
1280                                 if(width % (maxw / 2))
1281                                         width=maxw;
1282                                 /* larger resoltion don't seem to work either */
1283                                 if(width == maxw && height == maxh)
1284                                         width /= 2;
1285                         }
1286
1287                         if ((hscale =
1288                              (((unsigned long)maxw) << 12) / width - 4096L) >=
1289                             0x4000)
1290                                 hscale = 0x3fff;
1291                         width =
1292                             (((unsigned long)maxw) << 12) / (hscale + 4096L);
1293
1294                         if ((vscale =
1295                              (((unsigned long)maxh) << 12) / height - 4096L) >=
1296                             0x4000)
1297                                 vscale = 0x3fff;
1298                         height =
1299                             (((unsigned long)maxh) << 12) / (vscale + 4096L);
1300
1301                         format->fmt.pix.width = width;
1302                         format->fmt.pix.height = height;
1303                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1304                         format->fmt.pix.bytesperline = width * 2;
1305                         format->fmt.pix.sizeimage = width * 2 * height;
1306                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1307                         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1308
1309                         em2820_videodbg("%s: returned %dx%d (%d, %d)",
1310                                  cmd ==
1311                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1312                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1313                                  format->fmt.pix.height, hscale, vscale);
1314
1315                         if (cmd == VIDIOC_TRY_FMT)
1316                                 return 0;
1317
1318                         for (i = 0; i < dev->num_frames; i++)
1319                                 if (dev->frame[i].vma_use_count) {
1320                                         em2820_videodbg("VIDIOC_S_FMT failed. "
1321                                                 "Unmap the buffers first.");
1322                                         return -EINVAL;
1323                                 }
1324
1325                         /* stop io in case it is already in progress */
1326                         if (dev->stream == STREAM_ON) {
1327                                 em2820_videodbg("VIDIOC_SET_FMT: interupting stream");
1328                                 if ((ret = em2820_stream_interrupt(dev)))
1329                                         return ret;
1330                         }
1331
1332                         em2820_release_buffers(dev);
1333                         dev->io = IO_NONE;
1334
1335                         /* set new image size */
1336                         dev->width = width;
1337                         dev->height = height;
1338                         dev->frame_size = dev->width * dev->height * 2;
1339                         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1340                         dev->bytesperline = dev->width * 2;
1341                         dev->hscale = hscale;
1342                         dev->vscale = vscale;
1343 /*                      dev->both_fileds = both_fileds; */
1344                         em2820_uninit_isoc(dev);
1345                         em2820_set_alternate(dev);
1346                         em2820_capture_start(dev, 1);
1347                         em2820_resolution_set(dev);
1348                         em2820_init_isoc(dev);
1349
1350                         return 0;
1351                 }
1352
1353                 /* --- streaming capture ------------------------------------- */
1354         case VIDIOC_REQBUFS:
1355                 {
1356                         struct v4l2_requestbuffers *rb = arg;
1357                         u32 i;
1358                         int ret;
1359
1360                         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1361                             rb->memory != V4L2_MEMORY_MMAP)
1362                                 return -EINVAL;
1363
1364                         if (dev->io == IO_READ) {
1365                                 em2820_videodbg ("method is set to read;"
1366                                         " close and open the device again to"
1367                                         " choose the mmap I/O method");
1368                                 return -EINVAL;
1369                         }
1370
1371                         for (i = 0; i < dev->num_frames; i++)
1372                                 if (dev->frame[i].vma_use_count) {
1373                                         em2820_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped");
1374                                         return -EINVAL;
1375                                 }
1376
1377                         if (dev->stream == STREAM_ON) {
1378                                 em2820_videodbg("VIDIOC_REQBUFS: interrupting stream");
1379                                 if ((ret = em2820_stream_interrupt(dev)))
1380                                         return ret;
1381                         }
1382
1383                         em2820_empty_framequeues(dev);
1384
1385                         em2820_release_buffers(dev);
1386                         if (rb->count)
1387                                 rb->count =
1388                                     em2820_request_buffers(dev, rb->count);
1389
1390                         dev->frame_current = NULL;
1391
1392                         em2820_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i",
1393                                                      rb->count);
1394                         dev->io = rb->count ? IO_MMAP : IO_NONE;
1395                         return 0;
1396                 }
1397
1398         case VIDIOC_QUERYBUF:
1399                 {
1400                         struct v4l2_buffer *b = arg;
1401
1402                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1403                             b->index >= dev->num_frames || dev->io != IO_MMAP)
1404                                 return -EINVAL;
1405
1406                         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1407
1408                         if (dev->frame[b->index].vma_use_count) {
1409                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1410                         }
1411                         if (dev->frame[b->index].state == F_DONE)
1412                                 b->flags |= V4L2_BUF_FLAG_DONE;
1413                         else if (dev->frame[b->index].state != F_UNUSED)
1414                                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1415                         return 0;
1416                 }
1417         case VIDIOC_QBUF:
1418                 {
1419                         struct v4l2_buffer *b = arg;
1420                         unsigned long lock_flags;
1421
1422                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1423                             b->index >= dev->num_frames || dev->io != IO_MMAP) {
1424                                 return -EINVAL;
1425                         }
1426
1427                         if (dev->frame[b->index].state != F_UNUSED) {
1428                                 return -EAGAIN;
1429                         }
1430                         dev->frame[b->index].state = F_QUEUED;
1431
1432                         /* add frame to fifo */
1433                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1434                         list_add_tail(&dev->frame[b->index].frame,
1435                                       &dev->inqueue);
1436                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1437
1438                         return 0;
1439                 }
1440         case VIDIOC_DQBUF:
1441                 {
1442                         struct v4l2_buffer *b = arg;
1443                         struct em2820_frame_t *f;
1444                         unsigned long lock_flags;
1445                         int ret = 0;
1446
1447                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1448                             || dev->io != IO_MMAP)
1449                                 return -EINVAL;
1450
1451                         if (list_empty(&dev->outqueue)) {
1452                                 if (dev->stream == STREAM_OFF)
1453                                         return -EINVAL;
1454                                 if (filp->f_flags & O_NONBLOCK)
1455                                         return -EAGAIN;
1456                                 ret = wait_event_interruptible
1457                                     (dev->wait_frame,
1458                                      (!list_empty(&dev->outqueue)) ||
1459                                      (dev->state & DEV_DISCONNECTED));
1460                                 if (ret)
1461                                         return ret;
1462                                 if (dev->state & DEV_DISCONNECTED)
1463                                         return -ENODEV;
1464                         }
1465
1466                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1467                         f = list_entry(dev->outqueue.next,
1468                                        struct em2820_frame_t, frame);
1469                         list_del(dev->outqueue.next);
1470                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1471
1472                         f->state = F_UNUSED;
1473                         memcpy(b, &f->buf, sizeof(*b));
1474
1475                         if (f->vma_use_count)
1476                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1477
1478                         return 0;
1479                 }
1480         default:
1481                 return em2820_do_ioctl(inode, filp, dev, cmd, arg,
1482                                        em2820_video_do_ioctl);
1483         }
1484         return 0;
1485 }
1486
1487 /*
1488  * em2820_v4l2_ioctl()
1489  * handle v4l2 ioctl the main action happens in em2820_v4l2_do_ioctl()
1490  */
1491 static int em2820_v4l2_ioctl(struct inode *inode, struct file *filp,
1492                              unsigned int cmd, unsigned long arg)
1493 {
1494         struct em2820 *dev = video_get_drvdata(video_devdata(filp));
1495         int ret = 0;
1496
1497         if (down_interruptible(&dev->fileop_lock))
1498                 return -ERESTARTSYS;
1499
1500         if (dev->state & DEV_DISCONNECTED) {
1501                 em2820_errdev("v4l2 ioctl: device not present\n");
1502                 up(&dev->fileop_lock);
1503                 return -ENODEV;
1504         }
1505
1506         if (dev->state & DEV_MISCONFIGURED) {
1507                 em2820_errdev
1508                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1509                 up(&dev->fileop_lock);
1510                 return -EIO;
1511         }
1512
1513         ret = video_usercopy(inode, filp, cmd, arg, em2820_video_do_ioctl);
1514
1515         up(&dev->fileop_lock);
1516
1517         return ret;
1518 }
1519
1520 static struct file_operations em2820_v4l_fops = {
1521         .owner = THIS_MODULE,
1522         .open = em2820_v4l2_open,
1523         .release = em2820_v4l2_close,
1524         .ioctl = em2820_v4l2_ioctl,
1525         .read = em2820_v4l2_read,
1526         .poll = em2820_v4l2_poll,
1527         .mmap = em2820_v4l2_mmap,
1528         .llseek = no_llseek,
1529 };
1530
1531 /******************************** usb interface *****************************************/
1532
1533 /*
1534  * em2820_init_dev()
1535  * allocates and inits the device structs, registers i2c bus and v4l device
1536  */
1537 static int em2820_init_dev(struct em2820 **devhandle, struct usb_device *udev,
1538                            int minor, int model)
1539 {
1540         struct em2820 *dev = *devhandle;
1541         int retval = -ENOMEM;
1542         int errCode, i;
1543         unsigned int maxh, maxw;
1544         struct usb_interface *uif;
1545
1546         dev->udev = udev;
1547         dev->model = model;
1548         init_MUTEX(&dev->lock);
1549         init_waitqueue_head(&dev->open);
1550
1551         dev->em2820_write_regs = em2820_write_regs;
1552         dev->em2820_read_reg = em2820_read_reg;
1553         dev->em2820_read_reg_req_len = em2820_read_reg_req_len;
1554         dev->em2820_write_regs_req = em2820_write_regs_req;
1555         dev->em2820_read_reg_req = em2820_read_reg_req;
1556         dev->is_em2800 = em2820_boards[model].is_em2800;
1557         dev->has_tuner = em2820_boards[model].has_tuner;
1558         dev->has_msp34xx = em2820_boards[model].has_msp34xx;
1559         dev->tda9887_conf = em2820_boards[model].tda9887_conf;
1560         dev->decoder = em2820_boards[model].decoder;
1561
1562         if (tuner >= 0)
1563                 dev->tuner_type = tuner;
1564         else
1565                 dev->tuner_type = em2820_boards[model].tuner_type;
1566
1567         dev->video_inputs = em2820_boards[model].vchannels;
1568
1569         for (i = 0; i < TVNORMS; i++)
1570                 if (em2820_boards[model].norm == tvnorms[i].mode)
1571                         break;
1572         if (i == TVNORMS)
1573                 i = 0;
1574
1575         dev->tvnorm = &tvnorms[i];      /* set default norm */
1576
1577         em2820_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1578
1579         maxw = norm_maxw(dev);
1580         maxh = norm_maxh(dev);
1581
1582         /* set default image size */
1583         dev->width = maxw;
1584         dev->height = maxh;
1585         dev->interlaced = EM2820_INTERLACED_DEFAULT;
1586         dev->field_size = dev->width * dev->height;
1587         dev->frame_size =
1588             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1589         dev->bytesperline = dev->width * 2;
1590         dev->hscale = 0;
1591         dev->vscale = 0;
1592         dev->ctl_input = 2;
1593
1594         /* setup video picture settings for saa7113h */
1595         memset(&dev->vpic, 0, sizeof(dev->vpic));
1596         dev->vpic.colour = 128 << 8;
1597         dev->vpic.hue = 128 << 8;
1598         dev->vpic.brightness = 128 << 8;
1599         dev->vpic.contrast = 192 << 8;
1600         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1601         dev->vpic.depth = 16;
1602         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1603
1604         /* compute alternate max packet sizes */
1605         uif = dev->udev->actconfig->interface[0];
1606         dev->alt_max_pkt_size[0] = 0;
1607         for (i = 1; i <= EM2820_MAX_ALT && i < uif->num_altsetting ; i++) {
1608                 u16 tmp =
1609                     le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1610                                 wMaxPacketSize);
1611                 dev->alt_max_pkt_size[i] =
1612                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1613         }
1614
1615 #ifdef CONFIG_MODULES
1616         /* request some modules */
1617         if (dev->decoder == EM2820_SAA7113)
1618                 request_module("saa7113");
1619         if (dev->decoder == EM2820_SAA7114)
1620                 request_module("saa7114");
1621         if (dev->decoder == EM2820_TVP5150)
1622                 request_module("tvp5150");
1623         if (dev->has_tuner)
1624                 request_module("tuner");
1625         if (dev->tda9887_conf)
1626                 request_module("tda9887");
1627 #endif
1628         errCode = em2820_config(dev);
1629         if (errCode) {
1630                 em2820_errdev("error configuring device\n");
1631                 kfree(dev);
1632                 return -ENOMEM;
1633         }
1634
1635         down(&dev->lock);
1636         /* register i2c bus */
1637         em2820_i2c_register(dev);
1638
1639         /* Do board specific init and eeprom reading */
1640         em2820_card_setup(dev);
1641
1642         /* configure the device */
1643         em2820_config_i2c(dev);
1644
1645         up(&dev->lock);
1646
1647         errCode = em2820_config(dev);
1648
1649 #ifdef CONFIG_MODULES
1650         if (dev->has_msp34xx)
1651                 request_module("msp3400");
1652 #endif
1653         /* allocate and fill v4l2 device struct */
1654         dev->vdev = video_device_alloc();
1655         if (NULL == dev->vdev) {
1656                 em2820_errdev("cannot allocate video_device.\n");
1657                 kfree(dev);
1658                 return -ENOMEM;
1659         }
1660
1661         dev->vdev->owner = THIS_MODULE;
1662         dev->vdev->type = VID_TYPE_CAPTURE;
1663         if (dev->has_tuner)
1664                 dev->vdev->type |= VID_TYPE_TUNER;
1665         dev->vdev->hardware = 0;
1666         dev->vdev->fops = &em2820_v4l_fops;
1667         dev->vdev->minor = -1;
1668         dev->vdev->dev = &dev->udev->dev;
1669         dev->vdev->release = video_device_release;
1670         snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1671                  "em2820 video");
1672         video_set_drvdata(dev->vdev, dev);
1673
1674         /* register v4l2 device */
1675         down(&dev->lock);
1676         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1677                 em2820_errdev("unable to register video device (error=%i).\n",
1678                               retval);
1679                 up(&dev->lock);
1680                 video_set_drvdata(dev->vdev, NULL);
1681                 video_device_release(dev->vdev);
1682                 kfree(dev);
1683                 return -ENODEV;
1684         }
1685         if (dev->has_msp34xx) {
1686                 /* Send a reset to other chips via gpio */
1687                 em2820_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1688                 udelay(2500);
1689                 em2820_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1690                 udelay(2500);
1691
1692         }
1693         video_mux(dev, 0);
1694
1695         up(&dev->lock);
1696
1697         em2820_info("V4L2 device registered as /dev/video%d\n",
1698                     dev->vdev->minor);
1699
1700         return 0;
1701 }
1702
1703 /*
1704  * em2820_usb_probe()
1705  * checks for supported devices
1706  */
1707 static int em2820_usb_probe(struct usb_interface *interface,
1708                             const struct usb_device_id *id)
1709 {
1710         const struct usb_endpoint_descriptor *endpoint;
1711         struct usb_device *udev;
1712         struct em2820 *dev = NULL;
1713         int retval = -ENODEV;
1714         int model,i,nr,ifnum;
1715
1716         udev = usb_get_dev(interface_to_usbdev(interface));
1717         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1718
1719         em2820_err(DRIVER_NAME " new device (%04x:%04x): interface %i, class %i\n",
1720                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1721                         ifnum,
1722                         interface->altsetting[0].desc.bInterfaceClass);
1723
1724         /* Don't register audio interfaces */
1725         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO)
1726                 return -ENODEV;
1727
1728         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1729
1730         /* check if the the device has the iso in endpoint at the correct place */
1731         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1732             USB_ENDPOINT_XFER_ISOC) {
1733                 em2820_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1734                 return -ENODEV;
1735         }
1736         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1737                 em2820_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1738                 return -ENODEV;
1739         }
1740
1741         model=id->driver_info;
1742         nr=interface->minor;
1743
1744         if (nr>EM2820_MAXBOARDS) {
1745                 printk ("em2820: Supports only %i em28xx boards.\n",EM2820_MAXBOARDS);
1746                 return -ENOMEM;
1747         }
1748
1749         /* allocate memory for our device state and initialize it */
1750         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
1751         if (dev == NULL) {
1752                 em2820_err(DRIVER_NAME ": out of memory!\n");
1753                 return -ENOMEM;
1754         }
1755         memset(dev, 0, sizeof(*dev));
1756
1757         snprintf(dev->name, 29, "em2820 #%d", nr);
1758
1759         if ((card[nr]>=0)&&(card[nr]<em2820_bcount))
1760                 model=card[nr];
1761
1762         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1763                 printk( "%s: Your board has no eeprom inside it and thus can't\n"
1764                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
1765                         "%s: workaround that.  Redirect complaints to the vendor of\n"
1766                         "%s: the TV card.  Best regards,\n"
1767                         "%s:         -- tux\n",
1768                         dev->name,dev->name,dev->name,dev->name,dev->name);
1769                 printk("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1770                         dev->name);
1771                 for (i = 0; i < em2820_bcount; i++) {
1772                         printk("%s:    card=%d -> %s\n",
1773                                 dev->name, i, em2820_boards[i].name);
1774                 }
1775         }
1776
1777         /* allocate device struct */
1778         retval = em2820_init_dev(&dev, udev, nr, model);
1779         if (retval)
1780                 return retval;
1781
1782         em2820_info("Found %s\n", em2820_boards[model].name);
1783
1784         /* save our data pointer in this interface device */
1785         usb_set_intfdata(interface, dev);
1786         return 0;
1787 }
1788
1789 /*
1790  * em2820_usb_disconnect()
1791  * called when the device gets diconencted
1792  * video device will be unregistered on v4l2_close in case it is still open
1793  */
1794 static void em2820_usb_disconnect(struct usb_interface *interface)
1795 {
1796         struct em2820 *dev = usb_get_intfdata(interface);
1797         usb_set_intfdata(interface, NULL);
1798
1799         if (!dev)
1800                 return;
1801
1802         down_write(&em2820_disconnect);
1803
1804         down(&dev->lock);
1805
1806         em2820_info("disconnecting %s\n", dev->vdev->name);
1807
1808         wake_up_interruptible_all(&dev->open);
1809
1810         if (dev->users) {
1811                 em2820_warn
1812                     ("device /dev/video%d is open! Deregistration and memory "
1813                      "deallocation are deferred on close.\n", dev->vdev->minor);
1814                 dev->state |= DEV_MISCONFIGURED;
1815                 em2820_uninit_isoc(dev);
1816                 dev->state |= DEV_DISCONNECTED;
1817                 wake_up_interruptible(&dev->wait_frame);
1818                 wake_up_interruptible(&dev->wait_stream);
1819         } else {
1820                 dev->state |= DEV_DISCONNECTED;
1821                 em2820_release_resources(dev);
1822         }
1823
1824         up(&dev->lock);
1825
1826         if (!dev->users)
1827                 kfree(dev);
1828
1829         up_write(&em2820_disconnect);
1830
1831 }
1832
1833 static struct usb_driver em2820_usb_driver = {
1834         .owner = THIS_MODULE,
1835         .name = "em2820",
1836         .probe = em2820_usb_probe,
1837         .disconnect = em2820_usb_disconnect,
1838         .id_table = em2820_id_table,
1839 };
1840
1841 static int __init em2820_module_init(void)
1842 {
1843         int result;
1844
1845         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1846                (EM2820_VERSION_CODE >> 16) & 0xff,
1847                (EM2820_VERSION_CODE >> 8) & 0xff, EM2820_VERSION_CODE & 0xff);
1848 #ifdef SNAPSHOT
1849         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1850                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1851 #endif
1852
1853         /* register this driver with the USB subsystem */
1854         result = usb_register(&em2820_usb_driver);
1855         if (result)
1856                 em2820_err(DRIVER_NAME
1857                            " usb_register failed. Error number %d.\n", result);
1858
1859         return result;
1860 }
1861
1862 static void __exit em2820_module_exit(void)
1863 {
1864         /* deregister this driver with the USB subsystem */
1865         usb_deregister(&em2820_usb_driver);
1866 }
1867
1868 module_init(em2820_module_init);
1869 module_exit(em2820_module_exit);