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 LIST_HEAD(em2820_devlist);
  54
  55 static unsigned int card[]  = {[0 ... (EM2820_MAXBOARDS - 1)] = UNSET };
  56
  57 module_param_array(card,  int, NULL, 0444);
  58 MODULE_PARM_DESC(card,"card type");
  59
  60 static int tuner = -1;
  61 module_param(tuner, int, 0444);
  62 MODULE_PARM_DESC(tuner, "tuner type");
  63
  64 static unsigned int video_debug = 0;
  65 module_param(video_debug,int,0644);
  66 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  67
  68 /* supported tv norms */
  69 static struct em2820_tvnorm tvnorms[] = {
  70         {
  71                 .name = "PAL",
  72                 .id = V4L2_STD_PAL,
  73                 .mode = VIDEO_MODE_PAL,
  74          }, {
  75                 .name = "NTSC",
  76                 .id = V4L2_STD_NTSC,
  77                 .mode = VIDEO_MODE_NTSC,
  78         }, {
  79                  .name = "SECAM",
  80                  .id = V4L2_STD_SECAM,
  81                  .mode = VIDEO_MODE_SECAM,
  82         }, {
  83                 .name = "PAL-M",
  84                 .id = V4L2_STD_PAL_M,
  85                 .mode = VIDEO_MODE_PAL,
  86         }
  87 };
  88
  89 #define TVNORMS ARRAY_SIZE(tvnorms)
  90
  91 /* supported controls */
  92 static struct v4l2_queryctrl em2820_qctrl[] = {
  93         {
  94                 .id = V4L2_CID_BRIGHTNESS,
  95                 .type = V4L2_CTRL_TYPE_INTEGER,
  96                 .name = "Brightness",
  97                 .minimum = -128,
  98                 .maximum = 127,
  99                 .step = 1,
 100                 .default_value = 0,
 101                 .flags = 0,
 102         },{
 103                 .id = V4L2_CID_CONTRAST,
 104                 .type = V4L2_CTRL_TYPE_INTEGER,
 105                 .name = "Contrast",
 106                 .minimum = 0x0,
 107                 .maximum = 0x1f,
 108                 .step = 0x1,
 109                 .default_value = 0x10,
 110                 .flags = 0,
 111         },{
 112                 .id = V4L2_CID_SATURATION,
 113                 .type = V4L2_CTRL_TYPE_INTEGER,
 114                 .name = "Saturation",
 115                 .minimum = 0x0,
 116                 .maximum = 0x1f,
 117                 .step = 0x1,
 118                 .default_value = 0x10,
 119                 .flags = 0,
 120         },{
 121                 .id = V4L2_CID_AUDIO_VOLUME,
 122                 .type = V4L2_CTRL_TYPE_INTEGER,
 123                 .name = "Volume",
 124                 .minimum = 0x0,
 125                 .maximum = 0x1f,
 126                 .step = 0x1,
 127                 .default_value = 0x1f,
 128                 .flags = 0,
 129         },{
 130                 .id = V4L2_CID_AUDIO_MUTE,
 131                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 132                 .name = "Mute",
 133                 .minimum = 0,
 134                 .maximum = 1,
 135                 .step = 1,
 136                 .default_value = 1,
 137                 .flags = 0,
 138         },{
 139                 .id = V4L2_CID_RED_BALANCE,
 140                 .type = V4L2_CTRL_TYPE_INTEGER,
 141                 .name = "Red chroma balance",
 142                 .minimum = -128,
 143                 .maximum = 127,
 144                 .step = 1,
 145                 .default_value = 0,
 146                 .flags = 0,
 147         },{
 148                 .id = V4L2_CID_BLUE_BALANCE,
 149                 .type = V4L2_CTRL_TYPE_INTEGER,
 150                 .name = "Blue chroma balance",
 151                 .minimum = -128,
 152                 .maximum = 127,
 153                 .step = 1,
 154                 .default_value = 0,
 155                 .flags = 0,
 156         },{
 157                 .id = V4L2_CID_GAMMA,
 158                 .type = V4L2_CTRL_TYPE_INTEGER,
 159                 .name = "Gamma",
 160                 .minimum = 0x0,
 161                 .maximum = 0x3f,
 162                 .step = 0x1,
 163                 .default_value = 0x20,
 164                 .flags = 0,
 165          }
 166 };
 167
 168 static struct usb_driver em2820_usb_driver;
 169
 170 static DECLARE_MUTEX(em2820_sysfs_lock);
 171 static DECLARE_RWSEM(em2820_disconnect);
 172
 173 /*********************  v4l2 interface  ******************************************/
 174
 175 static inline unsigned long kvirt_to_pa(unsigned long adr)
 176 {
 177         unsigned long kva, ret;
 178
 179         kva = (unsigned long)page_address(vmalloc_to_page((void *)adr));
 180         kva |= adr & (PAGE_SIZE - 1);
 181         ret = __pa(kva);
 182         return ret;
 183 }
 184
 185 /*
 186  * em2820_config()
 187  * inits registers with sane defaults
 188  */
 189 static int em2820_config(struct em2820 *dev)
 190 {
 191
 192         /* Sets I2C speed to 100 KHz */
 193         em2820_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 194
 195         /* enable vbi capturing */
 196         em2820_audio_usb_mute(dev, 1);
 197         dev->mute = 1;          /* maybe not the right place... */
 198         dev->volume = 0x1f;
 199         em2820_audio_analog_set(dev);
 200         em2820_audio_analog_setup(dev);
 201         em2820_outfmt_set_yuv422(dev);
 202         em2820_colorlevels_set_default(dev);
 203         em2820_compression_disable(dev);
 204
 205         return 0;
 206 }
 207
 208 /*
 209  * em2820_config_i2c()
 210  * configure i2c attached devices
 211  */
 212 void em2820_config_i2c(struct em2820 *dev)
 213 {
 214         struct v4l2_frequency f;
 215         struct video_decoder_init em2820_vdi = {.data = NULL };
 216
 217
 218         /* configure decoder */
 219         em2820_i2c_call_clients(dev, DECODER_INIT, &em2820_vdi);
 220         em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &dev->ctl_input);
 221 /*      em2820_i2c_call_clients(dev,DECODER_SET_PICTURE, &dev->vpic); */
 222 /*      em2820_i2c_call_clients(dev,DECODER_SET_NORM,&dev->tvnorm->id); */
 223 /*      em2820_i2c_call_clients(dev,DECODER_ENABLE_OUTPUT,&output); */
 224 /*      em2820_i2c_call_clients(dev,DECODER_DUMP, NULL); */
 225
 226         /* configure tuner */
 227         f.tuner = 0;
 228         f.type = V4L2_TUNER_ANALOG_TV;
 229         f.frequency = 9076;     /* FIXME:remove magic number */
 230         dev->ctl_freq = f.frequency;
 231         em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
 232
 233         /* configure tda9887 */
 234
 235
 236 /*      em2820_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
 237 }
 238
 239 /*
 240  * em2820_empty_framequeues()
 241  * prepare queues for incoming and outgoing frames
 242  */
 243 static void em2820_empty_framequeues(struct em2820 *dev)
 244 {
 245         u32 i;
 246
 247         INIT_LIST_HEAD(&dev->inqueue);
 248         INIT_LIST_HEAD(&dev->outqueue);
 249
 250         for (i = 0; i < EM2820_NUM_FRAMES; i++) {
 251                 dev->frame[i].state = F_UNUSED;
 252                 dev->frame[i].buf.bytesused = 0;
 253         }
 254 }
 255
 256 /*
 257  * em2820_v4l2_open()
 258  * inits the device and starts isoc transfer
 259  */
 260 static int em2820_v4l2_open(struct inode *inode, struct file *filp)
 261 {
 262         int minor = iminor(inode);
 263         int errCode = 0;
 264         struct em2820 *h,*dev = NULL;
 265         struct list_head *list;
 266
 267         list_for_each(list,&em2820_devlist) {
 268                 h = list_entry(list, struct em2820, devlist);
 269                 if (h->vdev->minor == minor) {
 270                         dev  = h;
 271                 }
 272         }
 273
 274         filp->private_data=dev;
 275
 276
 277         em2820_videodbg("users=%d", dev->users);
 278
 279         if (!down_read_trylock(&em2820_disconnect))
 280                 return -ERESTARTSYS;
 281
 282         if (dev->users) {
 283                 em2820_warn("this driver can be opened only once\n");
 284                 up_read(&em2820_disconnect);
 285                 return -EBUSY;
 286         }
 287
 288 /*      if(dev->vbi_dev->minor == minor){
 289                 dev->type=V4L2_BUF_TYPE_VBI_CAPTURE;
 290         }*/
 291         if (dev->vdev->minor == minor) {
 292                 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 293         }
 294
 295         init_MUTEX(&dev->fileop_lock);  /* to 1 == available */
 296         spin_lock_init(&dev->queue_lock);
 297         init_waitqueue_head(&dev->wait_frame);
 298         init_waitqueue_head(&dev->wait_stream);
 299
 300         down(&dev->lock);
 301
 302         em2820_set_alternate(dev);
 303
 304         dev->width = norm_maxw(dev);
 305         dev->height = norm_maxh(dev);
 306         dev->frame_size = dev->width * dev->height * 2;
 307         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 308         dev->bytesperline = dev->width * 2;
 309         dev->hscale = 0;
 310         dev->vscale = 0;
 311
 312         em2820_capture_start(dev, 1);
 313         em2820_resolution_set(dev);
 314
 315         /* start the transfer */
 316         errCode = em2820_init_isoc(dev);
 317         if (errCode)
 318                 goto err;
 319
 320         dev->users++;
 321         filp->private_data = dev;
 322         dev->io = IO_NONE;
 323         dev->stream = STREAM_OFF;
 324         dev->num_frames = 0;
 325
 326         /* prepare queues */
 327         em2820_empty_framequeues(dev);
 328
 329         dev->state |= DEV_INITIALIZED;
 330
 331       err:
 332         up(&dev->lock);
 333         up_read(&em2820_disconnect);
 334         return errCode;
 335 }
 336
 337 /*
 338  * em2820_realease_resources()
 339  * unregisters the v4l2,i2c and usb devices
 340  * called when the device gets disconected or at module unload
 341 */
 342 static void em2820_release_resources(struct em2820 *dev)
 343 {
 344         down(&em2820_sysfs_lock);
 345
 346         em2820_info("V4L2 device /dev/video%d deregistered\n",
 347                     dev->vdev->minor);
 348         list_del(&dev->devlist);
 349         video_unregister_device(dev->vdev);
 350 /*      video_unregister_device(dev->vbi_dev); */
 351         em2820_i2c_unregister(dev);
 352         usb_put_dev(dev->udev);
 353         up(&em2820_sysfs_lock);
 354 }
 355
 356 /*
 357  * em2820_v4l2_close()
 358  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 359  */
 360 static int em2820_v4l2_close(struct inode *inode, struct file *file)
 361 {
 362         int errCode;
 363         int minor = iminor(inode);
 364         struct em2820 *h,*dev = NULL;
 365         struct list_head *list;
 366
 367         list_for_each(list,&em2820_devlist) {
 368                 h = list_entry(list, struct em2820, devlist);
 369                 if (h->vdev->minor == minor) {
 370                         dev  = h;
 371                 }
 372         }
 373
 374
 375         em2820_videodbg("users=%d", dev->users);
 376
 377         down(&dev->lock);
 378
 379         em2820_uninit_isoc(dev);
 380
 381         em2820_release_buffers(dev);
 382
 383         /* the device is already disconnect, free the remaining resources */
 384         if (dev->state & DEV_DISCONNECTED) {
 385                 em2820_release_resources(dev);
 386                 up(&dev->lock);
 387                 kfree(dev);
 388                 return 0;
 389         }
 390
 391         /* set alternate 0 */
 392         dev->alt = 0;
 393         em2820_videodbg("setting alternate 0");
 394         errCode = usb_set_interface(dev->udev, 0, 0);
 395         if (errCode < 0) {
 396                 em2820_errdev ("cannot change alternate number to 0 (error=%i)\n",
 397                      errCode);
 398         }
 399
 400         dev->users--;
 401         wake_up_interruptible_nr(&dev->open, 1);
 402         up(&dev->lock);
 403         return 0;
 404 }
 405
 406 /*
 407  * em2820_v4l2_read()
 408  * will allocate buffers when called for the first time
 409  */
 410 static ssize_t
 411 em2820_v4l2_read(struct file *filp, char __user * buf, size_t count,
 412                  loff_t * f_pos)
 413 {
 414         struct em2820_frame_t *f, *i;
 415         unsigned long lock_flags;
 416         int ret = 0;
 417         struct em2820 *dev = filp->private_data;
 418
 419         if (down_interruptible(&dev->fileop_lock))
 420                 return -ERESTARTSYS;
 421
 422         if (dev->state & DEV_DISCONNECTED) {
 423                 em2820_videodbg("device not present");
 424                 up(&dev->fileop_lock);
 425                 return -ENODEV;
 426         }
 427
 428         if (dev->state & DEV_MISCONFIGURED) {
 429                 em2820_videodbg("device misconfigured; close and open it again");
 430                 up(&dev->fileop_lock);
 431                 return -EIO;
 432         }
 433
 434         if (dev->io == IO_MMAP) {
 435                 em2820_videodbg ("IO method is set to mmap; close and open"
 436                                 " the device again to choose the read method");
 437                 up(&dev->fileop_lock);
 438                 return -EINVAL;
 439         }
 440
 441         if (dev->io == IO_NONE) {
 442                 if (!em2820_request_buffers(dev, EM2820_NUM_READ_FRAMES)) {
 443                         em2820_errdev("read failed, not enough memory\n");
 444                         up(&dev->fileop_lock);
 445                         return -ENOMEM;
 446                 }
 447                 dev->io = IO_READ;
 448                 dev->stream = STREAM_ON;
 449                 em2820_queue_unusedframes(dev);
 450         }
 451
 452         if (!count) {
 453                 up(&dev->fileop_lock);
 454                 return 0;
 455         }
 456
 457         if (list_empty(&dev->outqueue)) {
 458                 if (filp->f_flags & O_NONBLOCK) {
 459                         up(&dev->fileop_lock);
 460                         return -EAGAIN;
 461                 }
 462                 ret = wait_event_interruptible
 463                     (dev->wait_frame,
 464                      (!list_empty(&dev->outqueue)) ||
 465                      (dev->state & DEV_DISCONNECTED));
 466                 if (ret) {
 467                         up(&dev->fileop_lock);
 468                         return ret;
 469                 }
 470                 if (dev->state & DEV_DISCONNECTED) {
 471                         up(&dev->fileop_lock);
 472                         return -ENODEV;
 473                 }
 474         }
 475
 476         f = list_entry(dev->outqueue.prev, struct em2820_frame_t, frame);
 477
 478         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 479         list_for_each_entry(i, &dev->outqueue, frame)
 480             i->state = F_UNUSED;
 481         INIT_LIST_HEAD(&dev->outqueue);
 482         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 483
 484         em2820_queue_unusedframes(dev);
 485
 486         if (count > f->buf.length)
 487                 count = f->buf.length;
 488
 489         if (copy_to_user(buf, f->bufmem, count)) {
 490                 up(&dev->fileop_lock);
 491                 return -EFAULT;
 492         }
 493         *f_pos += count;
 494
 495         up(&dev->fileop_lock);
 496
 497         return count;
 498 }
 499
 500 /*
 501  * em2820_v4l2_poll()
 502  * will allocate buffers when called for the first time
 503  */
 504 static unsigned int em2820_v4l2_poll(struct file *filp, poll_table * wait)
 505 {
 506         unsigned int mask = 0;
 507         struct em2820 *dev = filp->private_data;
 508
 509         if (down_interruptible(&dev->fileop_lock))
 510                 return POLLERR;
 511
 512         if (dev->state & DEV_DISCONNECTED) {
 513                 em2820_videodbg("device not present");
 514         } else if (dev->state & DEV_MISCONFIGURED) {
 515                 em2820_videodbg("device is misconfigured; close and open it again");
 516         } else {
 517                 if (dev->io == IO_NONE) {
 518                         if (!em2820_request_buffers
 519                             (dev, EM2820_NUM_READ_FRAMES)) {
 520                                 em2820_warn
 521                                     ("poll() failed, not enough memory\n");
 522                         } else {
 523                                 dev->io = IO_READ;
 524                                 dev->stream = STREAM_ON;
 525                         }
 526                 }
 527
 528                 if (dev->io == IO_READ) {
 529                         em2820_queue_unusedframes(dev);
 530                         poll_wait(filp, &dev->wait_frame, wait);
 531
 532                         if (!list_empty(&dev->outqueue))
 533                                 mask |= POLLIN | POLLRDNORM;
 534
 535                         up(&dev->fileop_lock);
 536
 537                         return mask;
 538                 }
 539         }
 540
 541         up(&dev->fileop_lock);
 542         return POLLERR;
 543 }
 544
 545 /*
 546  * em2820_vm_open()
 547  */
 548 static void em2820_vm_open(struct vm_area_struct *vma)
 549 {
 550         struct em2820_frame_t *f = vma->vm_private_data;
 551         f->vma_use_count++;
 552 }
 553
 554 /*
 555  * em2820_vm_close()
 556  */
 557 static void em2820_vm_close(struct vm_area_struct *vma)
 558 {
 559         /* NOTE: buffers are not freed here */
 560         struct em2820_frame_t *f = vma->vm_private_data;
 561         f->vma_use_count--;
 562 }
 563
 564 static struct vm_operations_struct em2820_vm_ops = {
 565         .open = em2820_vm_open,
 566         .close = em2820_vm_close,
 567 };
 568
 569 /*
 570  * em2820_v4l2_mmap()
 571  */
 572 static int em2820_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 573 {
 574         unsigned long size = vma->vm_end - vma->vm_start,
 575             start = vma->vm_start, pos, page;
 576         u32 i;
 577
 578         struct em2820 *dev = filp->private_data;
 579
 580         if (down_interruptible(&dev->fileop_lock))
 581                 return -ERESTARTSYS;
 582
 583         if (dev->state & DEV_DISCONNECTED) {
 584                 em2820_videodbg("mmap: device not present");
 585                 up(&dev->fileop_lock);
 586                 return -ENODEV;
 587         }
 588
 589         if (dev->state & DEV_MISCONFIGURED) {
 590                 em2820_videodbg ("mmap: Device is misconfigured; close and "
 591                                                 "open it again");
 592                 up(&dev->fileop_lock);
 593                 return -EIO;
 594         }
 595
 596         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 597             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 598                 up(&dev->fileop_lock);
 599                 return -EINVAL;
 600         }
 601
 602         for (i = 0; i < dev->num_frames; i++) {
 603                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 604                         break;
 605         }
 606         if (i == dev->num_frames) {
 607                 em2820_videodbg("mmap: user supplied mapping address is out of range");
 608                 up(&dev->fileop_lock);
 609                 return -EINVAL;
 610         }
 611
 612         /* VM_IO is eventually going to replace PageReserved altogether */
 613         vma->vm_flags |= VM_IO;
 614         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 615
 616         pos = (unsigned long)dev->frame[i].bufmem;
 617         while (size > 0) {      /* size is page-aligned */
 618                 page = vmalloc_to_pfn((void *)pos);
 619                 if (remap_pfn_range(vma, start, page, PAGE_SIZE,
 620                                     vma->vm_page_prot)) {
 621                         em2820_videodbg("mmap: rename page map failed");
 622                         up(&dev->fileop_lock);
 623                         return -EAGAIN;
 624                 }
 625                 start += PAGE_SIZE;
 626                 pos += PAGE_SIZE;
 627                 size -= PAGE_SIZE;
 628         }
 629
 630         vma->vm_ops = &em2820_vm_ops;
 631         vma->vm_private_data = &dev->frame[i];
 632
 633         em2820_vm_open(vma);
 634         up(&dev->fileop_lock);
 635         return 0;
 636 }
 637
 638 /*
 639  * em2820_get_ctrl()
 640  * return the current saturation, brightness or contrast, mute state
 641  */
 642 static int em2820_get_ctrl(struct em2820 *dev, struct v4l2_control *ctrl)
 643 {
 644         s32 tmp;
 645         switch (ctrl->id) {
 646         case V4L2_CID_AUDIO_MUTE:
 647                 ctrl->value = dev->mute;
 648                 return 0;
 649         case V4L2_CID_AUDIO_VOLUME:
 650                 ctrl->value = dev->volume;
 651                 return 0;
 652         case V4L2_CID_BRIGHTNESS:
 653                 if ((tmp = em2820_brightness_get(dev)) < 0)
 654                         return -EIO;
 655                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 656                 return 0;
 657         case V4L2_CID_CONTRAST:
 658                 if ((ctrl->value = em2820_contrast_get(dev)) < 0)
 659                         return -EIO;
 660                 return 0;
 661         case V4L2_CID_SATURATION:
 662                 if ((ctrl->value = em2820_saturation_get(dev)) < 0)
 663                         return -EIO;
 664                 return 0;
 665         case V4L2_CID_RED_BALANCE:
 666                 if ((tmp = em2820_v_balance_get(dev)) < 0)
 667                         return -EIO;
 668                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 669                 return 0;
 670         case V4L2_CID_BLUE_BALANCE:
 671                 if ((tmp = em2820_u_balance_get(dev)) < 0)
 672                         return -EIO;
 673                 ctrl->value = (s32) ((s8) tmp); /* FIXME: clenaer way to extend sign? */
 674                 return 0;
 675         case V4L2_CID_GAMMA:
 676                 if ((ctrl->value = em2820_gamma_get(dev)) < 0)
 677                         return -EIO;
 678                 return 0;
 679         default:
 680                 return -EINVAL;
 681         }
 682 }
 683
 684 /*
 685  * em2820_set_ctrl()
 686  * mute or set new saturation, brightness or contrast
 687  */
 688 static int em2820_set_ctrl(struct em2820 *dev, const struct v4l2_control *ctrl)
 689 {
 690         switch (ctrl->id) {
 691         case V4L2_CID_AUDIO_MUTE:
 692                 if (ctrl->value != dev->mute) {
 693                         dev->mute = ctrl->value;
 694                         em2820_audio_usb_mute(dev, ctrl->value);
 695                         return em2820_audio_analog_set(dev);
 696                 }
 697                 return 0;
 698         case V4L2_CID_AUDIO_VOLUME:
 699                 dev->volume = ctrl->value;
 700                 return em2820_audio_analog_set(dev);
 701         case V4L2_CID_BRIGHTNESS:
 702                 return em2820_brightness_set(dev, ctrl->value);
 703         case V4L2_CID_CONTRAST:
 704                 return em2820_contrast_set(dev, ctrl->value);
 705         case V4L2_CID_SATURATION:
 706                 return em2820_saturation_set(dev, ctrl->value);
 707         case V4L2_CID_RED_BALANCE:
 708                 return em2820_v_balance_set(dev, ctrl->value);
 709         case V4L2_CID_BLUE_BALANCE:
 710                 return em2820_u_balance_set(dev, ctrl->value);
 711         case V4L2_CID_GAMMA:
 712                 return em2820_gamma_set(dev, ctrl->value);
 713         default:
 714                 return -EINVAL;
 715         }
 716 }
 717
 718 /*
 719  * em2820_stream_interrupt()
 720  * stops streaming
 721  */
 722 static int em2820_stream_interrupt(struct em2820 *dev)
 723 {
 724         int ret = 0;
 725
 726         /* stop reading from the device */
 727
 728         dev->stream = STREAM_INTERRUPT;
 729         ret = wait_event_timeout(dev->wait_stream,
 730                                  (dev->stream == STREAM_OFF) ||
 731                                  (dev->state & DEV_DISCONNECTED),
 732                                  EM2820_URB_TIMEOUT);
 733         if (dev->state & DEV_DISCONNECTED)
 734                 return -ENODEV;
 735         else if (ret) {
 736                 dev->state |= DEV_MISCONFIGURED;
 737                 em2820_videodbg("device is misconfigured; close and "
 738                         "open /dev/video%d again", dev->vdev->minor);
 739                 return ret;
 740         }
 741
 742         return 0;
 743 }
 744
 745 static int em2820_set_norm(struct em2820 *dev, int width, int height)
 746 {
 747         unsigned int hscale, vscale;
 748         unsigned int maxh, maxw;
 749
 750         maxw = norm_maxw(dev);
 751         maxh = norm_maxh(dev);
 752
 753         /* width must even because of the YUYV format */
 754         /* height must be even because of interlacing */
 755         height &= 0xfffe;
 756         width &= 0xfffe;
 757
 758         if (height < 32)
 759                 height = 32;
 760         if (height > maxh)
 761                 height = maxh;
 762         if (width < 48)
 763                 width = 48;
 764         if (width > maxw)
 765                 width = maxw;
 766
 767         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 768                 hscale = 0x3fff;
 769         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 770
 771         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 772                 vscale = 0x3fff;
 773         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 774
 775         /* set new image size */
 776         dev->width = width;
 777         dev->height = height;
 778         dev->frame_size = dev->width * dev->height * 2;
 779         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 780         dev->bytesperline = dev->width * 2;
 781         dev->hscale = hscale;
 782         dev->vscale = vscale;
 783
 784         em2820_resolution_set(dev);
 785
 786         return 0;
 787 }
 788
 789 static void video_mux(struct em2820 *dev, int index)
 790 {
 791         int input, ainput;
 792
 793         input = INPUT(index)->vmux;
 794         dev->ctl_input = index;
 795
 796         em2820_i2c_call_clients(dev, DECODER_SET_INPUT, &input);
 797
 798         dev->ctl_ainput = INPUT(index)->amux;
 799
 800         switch (dev->ctl_ainput) {
 801         case 0:
 802                 ainput = EM2820_AUDIO_SRC_TUNER;
 803                 break;
 804         default:
 805                 ainput = EM2820_AUDIO_SRC_LINE;
 806         }
 807
 808         em2820_audio_source(dev, ainput);
 809 }
 810
 811 /*
 812  * em2820_v4l2_do_ioctl()
 813  * This function is _not_ called directly, but from
 814  * em2820_v4l2_ioctl. Userspace
 815  * copying is done already, arg is a kernel pointer.
 816  */
 817 static int em2820_do_ioctl(struct inode *inode, struct file *filp,
 818                            struct em2820 *dev, unsigned int cmd, void *arg,
 819                            v4l2_kioctl driver_ioctl)
 820 {
 821         int ret;
 822
 823         switch (cmd) {
 824                 /* ---------- tv norms ---------- */
 825         case VIDIOC_ENUMSTD:
 826                 {
 827                         struct v4l2_standard *e = arg;
 828                         unsigned int i;
 829
 830                         i = e->index;
 831                         if (i >= TVNORMS)
 832                                 return -EINVAL;
 833                         ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 834                                                        tvnorms[e->index].name);
 835                         e->index = i;
 836                         if (ret < 0)
 837                                 return ret;
 838                         return 0;
 839                 }
 840         case VIDIOC_G_STD:
 841                 {
 842                         v4l2_std_id *id = arg;
 843
 844                         *id = dev->tvnorm->id;
 845                         return 0;
 846                 }
 847         case VIDIOC_S_STD:
 848                 {
 849                         v4l2_std_id *id = arg;
 850                         unsigned int i;
 851
 852                         for (i = 0; i < TVNORMS; i++)
 853                                 if (*id == tvnorms[i].id)
 854                                         break;
 855                         if (i == TVNORMS)
 856                                 for (i = 0; i < TVNORMS; i++)
 857                                         if (*id & tvnorms[i].id)
 858                                                 break;
 859                         if (i == TVNORMS)
 860                                 return -EINVAL;
 861
 862                         down(&dev->lock);
 863                         dev->tvnorm = &tvnorms[i];
 864
 865                         em2820_set_norm(dev, dev->width, dev->height);
 866
 867 /*
 868                 dev->width=norm_maxw(dev);
 869                 dev->height=norm_maxh(dev);
 870                 dev->frame_size=dev->width*dev->height*2;
 871                 dev->field_size=dev->frame_size>>1;
 872                 dev->bytesperline=dev->width*2;
 873                 dev->hscale=0;
 874                 dev->vscale=0;
 875
 876                 em2820_resolution_set(dev);
 877 */
 878 /*
 879                 em2820_uninit_isoc(dev);
 880                 em2820_set_alternate(dev);
 881                 em2820_capture_start(dev, 1);
 882                 em2820_resolution_set(dev);
 883                 em2820_init_isoc(dev);
 884 */
 885                         em2820_i2c_call_clients(dev, DECODER_SET_NORM,
 886                                                 &tvnorms[i].mode);
 887                         em2820_i2c_call_clients(dev, VIDIOC_S_STD,
 888                                                 &dev->tvnorm->id);
 889
 890                         up(&dev->lock);
 891
 892                         return 0;
 893                 }
 894
 895                 /* ------ input switching ---------- */
 896         case VIDIOC_ENUMINPUT:
 897                 {
 898                         struct v4l2_input *i = arg;
 899                         unsigned int n;
 900                         static const char *iname[] = {
 901                                 [EM2820_VMUX_COMPOSITE1] = "Composite1",
 902                                 [EM2820_VMUX_COMPOSITE2] = "Composite2",
 903                                 [EM2820_VMUX_COMPOSITE3] = "Composite3",
 904                                 [EM2820_VMUX_COMPOSITE4] = "Composite4",
 905                                 [EM2820_VMUX_SVIDEO] = "S-Video",
 906                                 [EM2820_VMUX_TELEVISION] = "Television",
 907                                 [EM2820_VMUX_CABLE] = "Cable TV",
 908                                 [EM2820_VMUX_DVB] = "DVB",
 909                                 [EM2820_VMUX_DEBUG] = "for debug only",
 910                         };
 911
 912                         n = i->index;
 913                         if (n >= MAX_EM2820_INPUT)
 914                                 return -EINVAL;
 915                         if (0 == INPUT(n)->type)
 916                                 return -EINVAL;
 917                         memset(i, 0, sizeof(*i));
 918                         i->index = n;
 919                         i->type = V4L2_INPUT_TYPE_CAMERA;
 920                         strcpy(i->name, iname[INPUT(n)->type]);
 921                         if ((EM2820_VMUX_TELEVISION == INPUT(n)->type) ||
 922                             (EM2820_VMUX_CABLE == INPUT(n)->type))
 923                                 i->type = V4L2_INPUT_TYPE_TUNER;
 924                         for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
 925                                 i->std |= tvnorms[n].id;
 926                         return 0;
 927                 }
 928
 929         case VIDIOC_G_INPUT:
 930                 {
 931                         int *i = arg;
 932                         *i = dev->ctl_input;
 933
 934                         return 0;
 935                 }
 936
 937         case VIDIOC_S_INPUT:
 938                 {
 939                         int *index = arg;
 940
 941                         if (*index >= MAX_EM2820_INPUT)
 942                                 return -EINVAL;
 943                         if (0 == INPUT(*index)->type)
 944                                 return -EINVAL;
 945
 946                         down(&dev->lock);
 947                         video_mux(dev, *index);
 948                         up(&dev->lock);
 949
 950                         return 0;
 951                 }
 952
 953         case VIDIOC_G_AUDIO:
 954                 {
 955                         struct v4l2_audio *a = arg;
 956                         unsigned int index = a->index;
 957
 958                         if (a->index > 1)
 959                                 return -EINVAL;
 960                         memset(a, 0, sizeof(*a));
 961                         index = dev->ctl_ainput;
 962
 963                         if (index == 0) {
 964                                 strcpy(a->name, "Television");
 965                         } else {
 966                                 strcpy(a->name, "Line In");
 967                         }
 968                         a->capability = V4L2_AUDCAP_STEREO;
 969                         a->index = index;
 970                         return 0;
 971                 }
 972
 973         case VIDIOC_S_AUDIO:
 974                 {
 975                         struct v4l2_audio *a = arg;
 976                         if (a->index != dev->ctl_ainput)
 977                                 return -EINVAL;
 978
 979                         return 0;
 980                 }
 981
 982                 /* --- controls ---------------------------------------------- */
 983         case VIDIOC_QUERYCTRL:
 984                 {
 985                         struct v4l2_queryctrl *qc = arg;
 986                         u8 i, n;
 987                         n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
 988                         for (i = 0; i < n; i++)
 989                                 if (qc->id && qc->id == em2820_qctrl[i].id) {
 990                                         memcpy(qc, &(em2820_qctrl[i]),
 991                                                sizeof(*qc));
 992                                         return 0;
 993                                 }
 994
 995                         return -EINVAL;
 996                 }
 997
 998         case VIDIOC_G_CTRL:
 999                 {
1000                         struct v4l2_control *ctrl = arg;
1001
1002
1003                         return em2820_get_ctrl(dev, ctrl);
1004                 }
1005
1006         case VIDIOC_S_CTRL_OLD: /* ??? */
1007         case VIDIOC_S_CTRL:
1008                 {
1009                         struct v4l2_control *ctrl = arg;
1010                         u8 i, n;
1011
1012
1013                         n = sizeof(em2820_qctrl) / sizeof(em2820_qctrl[0]);
1014                         for (i = 0; i < n; i++)
1015                                 if (ctrl->id == em2820_qctrl[i].id) {
1016                                         if (ctrl->value <
1017                                             em2820_qctrl[i].minimum
1018                                             || ctrl->value >
1019                                             em2820_qctrl[i].maximum)
1020                                                 return -ERANGE;
1021
1022                                         return em2820_set_ctrl(dev, ctrl);
1023                                 }
1024                         return -EINVAL;
1025                 }
1026
1027                 /* --- tuner ioctls ------------------------------------------ */
1028         case VIDIOC_G_TUNER:
1029                 {
1030                         struct v4l2_tuner *t = arg;
1031                         int status = 0;
1032
1033                         if (0 != t->index)
1034                                 return -EINVAL;
1035
1036                         memset(t, 0, sizeof(*t));
1037                         strcpy(t->name, "Tuner");
1038                         t->type = V4L2_TUNER_ANALOG_TV;
1039                         t->capability = V4L2_TUNER_CAP_NORM;
1040                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1041 /*              t->signal = 0xffff;*/
1042 /*              em2820_i2c_call_clients(dev,VIDIOC_G_TUNER,t);*/
1043                         /* No way to get signal strength? */
1044                         down(&dev->lock);
1045                         em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
1046                                                 &status);
1047                         up(&dev->lock);
1048                         t->signal =
1049                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1050
1051                         em2820_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x", t->signal,
1052                                  t->afc);
1053                         return 0;
1054                 }
1055         case VIDIOC_S_TUNER:
1056                 {
1057                         struct v4l2_tuner *t = arg;
1058                         int status = 0;
1059
1060                         if (0 != t->index)
1061                                 return -EINVAL;
1062                         memset(t, 0, sizeof(*t));
1063                         strcpy(t->name, "Tuner");
1064                         t->type = V4L2_TUNER_ANALOG_TV;
1065                         t->capability = V4L2_TUNER_CAP_NORM;
1066                         t->rangehigh = 0xffffffffUL;    /* FIXME: set correct range */
1067 /*              t->signal = 0xffff; */
1068                         /* No way to get signal strength? */
1069                         down(&dev->lock);
1070                         em2820_i2c_call_clients(dev, DECODER_GET_STATUS,
1071                                                 &status);
1072                         up(&dev->lock);
1073                         t->signal =
1074                             (status & DECODER_STATUS_GOOD) != 0 ? 0xffff : 0;
1075
1076                         em2820_videodbg("VIDIO_S_TUNER: signal=%x, afc=%x\n",
1077                                  t->signal, t->afc);
1078                         return 0;
1079                 }
1080         case VIDIOC_G_FREQUENCY:
1081                 {
1082                         struct v4l2_frequency *f = arg;
1083
1084                         memset(f, 0, sizeof(*f));
1085                         f->type = V4L2_TUNER_ANALOG_TV;
1086                         f->frequency = dev->ctl_freq;
1087
1088                         return 0;
1089                 }
1090         case VIDIOC_S_FREQUENCY:
1091                 {
1092                         struct v4l2_frequency *f = arg;
1093
1094                         if (0 != f->tuner)
1095                                 return -EINVAL;
1096
1097                         if (V4L2_TUNER_ANALOG_TV != f->type)
1098                                 return -EINVAL;
1099
1100                         down(&dev->lock);
1101                         dev->ctl_freq = f->frequency;
1102                         em2820_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1103                         up(&dev->lock);
1104                         return 0;
1105                 }
1106
1107         case VIDIOC_CROPCAP:
1108                 {
1109                         struct v4l2_cropcap *cc = arg;
1110
1111                         if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1112                                 return -EINVAL;
1113                         cc->bounds.left = 0;
1114                         cc->bounds.top = 0;
1115                         cc->bounds.width = dev->width;
1116                         cc->bounds.height = dev->height;
1117                         cc->defrect = cc->bounds;
1118                         cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1119                         cc->pixelaspect.denominator = 59;
1120                         return 0;
1121                 }
1122         case VIDIOC_STREAMON:
1123                 {
1124                         int *type = arg;
1125
1126                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1127                             || dev->io != IO_MMAP)
1128                                 return -EINVAL;
1129
1130                         if (list_empty(&dev->inqueue))
1131                                 return -EINVAL;
1132
1133                         dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1134
1135                         em2820_videodbg("VIDIOC_STREAMON: starting stream");
1136
1137                         return 0;
1138                 }
1139         case VIDIOC_STREAMOFF:
1140                 {
1141                         int *type = arg;
1142                         int ret;
1143
1144                         if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1145                             || dev->io != IO_MMAP)
1146                                 return -EINVAL;
1147
1148                         if (dev->stream == STREAM_ON) {
1149                                 em2820_videodbg ("VIDIOC_STREAMOFF: interrupting stream");
1150                                 if ((ret = em2820_stream_interrupt(dev)))
1151                                         return ret;
1152                         }
1153                         em2820_empty_framequeues(dev);
1154
1155                         return 0;
1156                 }
1157         default:
1158                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1159                                                   driver_ioctl);
1160         }
1161         return 0;
1162 }
1163
1164 /*
1165  * em2820_v4l2_do_ioctl()
1166  * This function is _not_ called directly, but from
1167  * em2820_v4l2_ioctl. Userspace
1168  * copying is done already, arg is a kernel pointer.
1169  */
1170 static int em2820_video_do_ioctl(struct inode *inode, struct file *filp,
1171                                  unsigned int cmd, void *arg)
1172 {
1173         struct em2820 *dev = filp->private_data;
1174
1175         if (!dev)
1176                 return -ENODEV;
1177
1178         if (video_debug > 1)
1179                 em2820_print_ioctl(dev->name,cmd);
1180
1181         switch (cmd) {
1182
1183                 /* --- capabilities ------------------------------------------ */
1184         case VIDIOC_QUERYCAP:
1185                 {
1186                         struct v4l2_capability *cap = arg;
1187
1188                         memset(cap, 0, sizeof(*cap));
1189                         strlcpy(cap->driver, "em2820", sizeof(cap->driver));
1190                         strlcpy(cap->card, em2820_boards[dev->model].name,
1191                                 sizeof(cap->card));
1192                         strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1193                                 sizeof(cap->bus_info));
1194                         cap->version = EM2820_VERSION_CODE;
1195                         cap->capabilities =
1196                             V4L2_CAP_VIDEO_CAPTURE |
1197                             V4L2_CAP_AUDIO |
1198                             V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1199                         if (dev->has_tuner)
1200                                 cap->capabilities |= V4L2_CAP_TUNER;
1201                         return 0;
1202                 }
1203
1204                 /* --- capture ioctls ---------------------------------------- */
1205         case VIDIOC_ENUM_FMT:
1206                 {
1207                         struct v4l2_fmtdesc *fmtd = arg;
1208
1209                         if (fmtd->index != 0)
1210                                 return -EINVAL;
1211                         memset(fmtd, 0, sizeof(*fmtd));
1212                         fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1213                         strcpy(fmtd->description, "Packed YUY2");
1214                         fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1215                         memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1216                         return 0;
1217                 }
1218
1219         case VIDIOC_G_FMT:
1220                 {
1221                         struct v4l2_format *format = arg;
1222
1223                         em2820_videodbg("VIDIOC_G_FMT: type=%s",
1224                                  format->type ==
1225                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1226                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1227                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1228                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1229                                  "not supported");
1230
1231                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1232                                 return -EINVAL;
1233
1234                         format->fmt.pix.width = dev->width;
1235                         format->fmt.pix.height = dev->height;
1236                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1237                         format->fmt.pix.bytesperline = dev->bytesperline;
1238                         format->fmt.pix.sizeimage = dev->frame_size;
1239                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1240                         format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
1241
1242                         em2820_videodbg("VIDIOC_G_FMT: %dx%d", dev->width,
1243                                  dev->height);
1244                         return 0;
1245                 }
1246
1247         case VIDIOC_TRY_FMT:
1248         case VIDIOC_S_FMT:
1249                 {
1250                         struct v4l2_format *format = arg;
1251                         u32 i;
1252                         int ret = 0;
1253                         int width = format->fmt.pix.width;
1254                         int height = format->fmt.pix.height;
1255                         unsigned int hscale, vscale;
1256                         unsigned int maxh, maxw;
1257
1258                         maxw = norm_maxw(dev);
1259                         maxh = norm_maxh(dev);
1260
1261 /*              int both_fields; */
1262
1263                         em2820_videodbg("%s: type=%s",
1264                                  cmd ==
1265                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1266                                  "VIDIOC_S_FMT",
1267                                  format->type ==
1268                                  V4L2_BUF_TYPE_VIDEO_CAPTURE ?
1269                                  "V4L2_BUF_TYPE_VIDEO_CAPTURE" : format->type ==
1270                                  V4L2_BUF_TYPE_VBI_CAPTURE ?
1271                                  "V4L2_BUF_TYPE_VBI_CAPTURE " :
1272                                  "not supported");
1273
1274                         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1275                                 return -EINVAL;
1276
1277                         em2820_videodbg("%s: requested %dx%d",
1278                                  cmd ==
1279                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1280                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1281                                  format->fmt.pix.height);
1282
1283                         /* FIXME: Move some code away from here */
1284                         /* width must even because of the YUYV format */
1285                         /* height must be even because of interlacing */
1286                         height &= 0xfffe;
1287                         width &= 0xfffe;
1288
1289                         if (height < 32)
1290                                 height = 32;
1291                         if (height > maxh)
1292                                 height = maxh;
1293                         if (width < 48)
1294                                 width = 48;
1295                         if (width > maxw)
1296                                 width = maxw;
1297
1298                         /* FIXME*/
1299                         if(dev->is_em2800){
1300                                 /* we only know how to scale to 50% */
1301                                 if(height % (maxh / 2))
1302                                         height=maxh;
1303                                 if(width % (maxw / 2))
1304                                         width=maxw;
1305                                 /* larger resoltion don't seem to work either */
1306                                 if(width == maxw && height == maxh)
1307                                         width /= 2;
1308                         }
1309
1310                         if ((hscale =
1311                              (((unsigned long)maxw) << 12) / width - 4096L) >=
1312                             0x4000)
1313                                 hscale = 0x3fff;
1314                         width =
1315                             (((unsigned long)maxw) << 12) / (hscale + 4096L);
1316
1317                         if ((vscale =
1318                              (((unsigned long)maxh) << 12) / height - 4096L) >=
1319                             0x4000)
1320                                 vscale = 0x3fff;
1321                         height =
1322                             (((unsigned long)maxh) << 12) / (vscale + 4096L);
1323
1324                         format->fmt.pix.width = width;
1325                         format->fmt.pix.height = height;
1326                         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
1327                         format->fmt.pix.bytesperline = width * 2;
1328                         format->fmt.pix.sizeimage = width * 2 * height;
1329                         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
1330                         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
1331
1332                         em2820_videodbg("%s: returned %dx%d (%d, %d)",
1333                                  cmd ==
1334                                  VIDIOC_TRY_FMT ? "VIDIOC_TRY_FMT" :
1335                                  "VIDIOC_S_FMT", format->fmt.pix.width,
1336                                  format->fmt.pix.height, hscale, vscale);
1337
1338                         if (cmd == VIDIOC_TRY_FMT)
1339                                 return 0;
1340
1341                         for (i = 0; i < dev->num_frames; i++)
1342                                 if (dev->frame[i].vma_use_count) {
1343                                         em2820_videodbg("VIDIOC_S_FMT failed. "
1344                                                 "Unmap the buffers first.");
1345                                         return -EINVAL;
1346                                 }
1347
1348                         /* stop io in case it is already in progress */
1349                         if (dev->stream == STREAM_ON) {
1350                                 em2820_videodbg("VIDIOC_SET_FMT: interupting stream");
1351                                 if ((ret = em2820_stream_interrupt(dev)))
1352                                         return ret;
1353                         }
1354
1355                         em2820_release_buffers(dev);
1356                         dev->io = IO_NONE;
1357
1358                         /* set new image size */
1359                         dev->width = width;
1360                         dev->height = height;
1361                         dev->frame_size = dev->width * dev->height * 2;
1362                         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1363                         dev->bytesperline = dev->width * 2;
1364                         dev->hscale = hscale;
1365                         dev->vscale = vscale;
1366 /*                      dev->both_fileds = both_fileds; */
1367                         em2820_uninit_isoc(dev);
1368                         em2820_set_alternate(dev);
1369                         em2820_capture_start(dev, 1);
1370                         em2820_resolution_set(dev);
1371                         em2820_init_isoc(dev);
1372
1373                         return 0;
1374                 }
1375
1376                 /* --- streaming capture ------------------------------------- */
1377         case VIDIOC_REQBUFS:
1378                 {
1379                         struct v4l2_requestbuffers *rb = arg;
1380                         u32 i;
1381                         int ret;
1382
1383                         if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1384                             rb->memory != V4L2_MEMORY_MMAP)
1385                                 return -EINVAL;
1386
1387                         if (dev->io == IO_READ) {
1388                                 em2820_videodbg ("method is set to read;"
1389                                         " close and open the device again to"
1390                                         " choose the mmap I/O method");
1391                                 return -EINVAL;
1392                         }
1393
1394                         for (i = 0; i < dev->num_frames; i++)
1395                                 if (dev->frame[i].vma_use_count) {
1396                                         em2820_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped");
1397                                         return -EINVAL;
1398                                 }
1399
1400                         if (dev->stream == STREAM_ON) {
1401                                 em2820_videodbg("VIDIOC_REQBUFS: interrupting stream");
1402                                 if ((ret = em2820_stream_interrupt(dev)))
1403                                         return ret;
1404                         }
1405
1406                         em2820_empty_framequeues(dev);
1407
1408                         em2820_release_buffers(dev);
1409                         if (rb->count)
1410                                 rb->count =
1411                                     em2820_request_buffers(dev, rb->count);
1412
1413                         dev->frame_current = NULL;
1414
1415                         em2820_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i",
1416                                                      rb->count);
1417                         dev->io = rb->count ? IO_MMAP : IO_NONE;
1418                         return 0;
1419                 }
1420
1421         case VIDIOC_QUERYBUF:
1422                 {
1423                         struct v4l2_buffer *b = arg;
1424
1425                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1426                             b->index >= dev->num_frames || dev->io != IO_MMAP)
1427                                 return -EINVAL;
1428
1429                         memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1430
1431                         if (dev->frame[b->index].vma_use_count) {
1432                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1433                         }
1434                         if (dev->frame[b->index].state == F_DONE)
1435                                 b->flags |= V4L2_BUF_FLAG_DONE;
1436                         else if (dev->frame[b->index].state != F_UNUSED)
1437                                 b->flags |= V4L2_BUF_FLAG_QUEUED;
1438                         return 0;
1439                 }
1440         case VIDIOC_QBUF:
1441                 {
1442                         struct v4l2_buffer *b = arg;
1443                         unsigned long lock_flags;
1444
1445                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1446                             b->index >= dev->num_frames || dev->io != IO_MMAP) {
1447                                 return -EINVAL;
1448                         }
1449
1450                         if (dev->frame[b->index].state != F_UNUSED) {
1451                                 return -EAGAIN;
1452                         }
1453                         dev->frame[b->index].state = F_QUEUED;
1454
1455                         /* add frame to fifo */
1456                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1457                         list_add_tail(&dev->frame[b->index].frame,
1458                                       &dev->inqueue);
1459                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1460
1461                         return 0;
1462                 }
1463         case VIDIOC_DQBUF:
1464                 {
1465                         struct v4l2_buffer *b = arg;
1466                         struct em2820_frame_t *f;
1467                         unsigned long lock_flags;
1468                         int ret = 0;
1469
1470                         if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1471                             || dev->io != IO_MMAP)
1472                                 return -EINVAL;
1473
1474                         if (list_empty(&dev->outqueue)) {
1475                                 if (dev->stream == STREAM_OFF)
1476                                         return -EINVAL;
1477                                 if (filp->f_flags & O_NONBLOCK)
1478                                         return -EAGAIN;
1479                                 ret = wait_event_interruptible
1480                                     (dev->wait_frame,
1481                                      (!list_empty(&dev->outqueue)) ||
1482                                      (dev->state & DEV_DISCONNECTED));
1483                                 if (ret)
1484                                         return ret;
1485                                 if (dev->state & DEV_DISCONNECTED)
1486                                         return -ENODEV;
1487                         }
1488
1489                         spin_lock_irqsave(&dev->queue_lock, lock_flags);
1490                         f = list_entry(dev->outqueue.next,
1491                                        struct em2820_frame_t, frame);
1492                         list_del(dev->outqueue.next);
1493                         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1494
1495                         f->state = F_UNUSED;
1496                         memcpy(b, &f->buf, sizeof(*b));
1497
1498                         if (f->vma_use_count)
1499                                 b->flags |= V4L2_BUF_FLAG_MAPPED;
1500
1501                         return 0;
1502                 }
1503         default:
1504                 return em2820_do_ioctl(inode, filp, dev, cmd, arg,
1505                                        em2820_video_do_ioctl);
1506         }
1507         return 0;
1508 }
1509
1510 /*
1511  * em2820_v4l2_ioctl()
1512  * handle v4l2 ioctl the main action happens in em2820_v4l2_do_ioctl()
1513  */
1514 static int em2820_v4l2_ioctl(struct inode *inode, struct file *filp,
1515                              unsigned int cmd, unsigned long arg)
1516 {
1517         int ret = 0;
1518         struct em2820 *dev = filp->private_data;
1519
1520         if (down_interruptible(&dev->fileop_lock))
1521                 return -ERESTARTSYS;
1522
1523         if (dev->state & DEV_DISCONNECTED) {
1524                 em2820_errdev("v4l2 ioctl: device not present\n");
1525                 up(&dev->fileop_lock);
1526                 return -ENODEV;
1527         }
1528
1529         if (dev->state & DEV_MISCONFIGURED) {
1530                 em2820_errdev
1531                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1532                 up(&dev->fileop_lock);
1533                 return -EIO;
1534         }
1535
1536         ret = video_usercopy(inode, filp, cmd, arg, em2820_video_do_ioctl);
1537
1538         up(&dev->fileop_lock);
1539
1540         return ret;
1541 }
1542
1543 static struct file_operations em2820_v4l_fops = {
1544         .owner = THIS_MODULE,
1545         .open = em2820_v4l2_open,
1546         .release = em2820_v4l2_close,
1547         .ioctl = em2820_v4l2_ioctl,
1548         .read = em2820_v4l2_read,
1549         .poll = em2820_v4l2_poll,
1550         .mmap = em2820_v4l2_mmap,
1551         .llseek = no_llseek,
1552 };
1553
1554 /******************************** usb interface *****************************************/
1555
1556 /*
1557  * em2820_init_dev()
1558  * allocates and inits the device structs, registers i2c bus and v4l device
1559  */
1560 static int em2820_init_dev(struct em2820 **devhandle, struct usb_device *udev,
1561                            int minor, int model)
1562 {
1563         struct em2820 *dev = *devhandle;
1564         int retval = -ENOMEM;
1565         int errCode, i;
1566         unsigned int maxh, maxw;
1567         struct usb_interface *uif;
1568
1569         dev->udev = udev;
1570         dev->model = model;
1571         init_MUTEX(&dev->lock);
1572         init_waitqueue_head(&dev->open);
1573
1574         dev->em2820_write_regs = em2820_write_regs;
1575         dev->em2820_read_reg = em2820_read_reg;
1576         dev->em2820_read_reg_req_len = em2820_read_reg_req_len;
1577         dev->em2820_write_regs_req = em2820_write_regs_req;
1578         dev->em2820_read_reg_req = em2820_read_reg_req;
1579         dev->is_em2800 = em2820_boards[model].is_em2800;
1580         dev->has_tuner = em2820_boards[model].has_tuner;
1581         dev->has_msp34xx = em2820_boards[model].has_msp34xx;
1582         dev->tda9887_conf = em2820_boards[model].tda9887_conf;
1583         dev->decoder = em2820_boards[model].decoder;
1584
1585         if (tuner >= 0)
1586                 dev->tuner_type = tuner;
1587         else
1588                 dev->tuner_type = em2820_boards[model].tuner_type;
1589
1590         dev->video_inputs = em2820_boards[model].vchannels;
1591
1592         for (i = 0; i < TVNORMS; i++)
1593                 if (em2820_boards[model].norm == tvnorms[i].mode)
1594                         break;
1595         if (i == TVNORMS)
1596                 i = 0;
1597
1598         dev->tvnorm = &tvnorms[i];      /* set default norm */
1599
1600         em2820_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1601
1602         maxw = norm_maxw(dev);
1603         maxh = norm_maxh(dev);
1604
1605         /* set default image size */
1606         dev->width = maxw;
1607         dev->height = maxh;
1608         dev->interlaced = EM2820_INTERLACED_DEFAULT;
1609         dev->field_size = dev->width * dev->height;
1610         dev->frame_size =
1611             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1612         dev->bytesperline = dev->width * 2;
1613         dev->hscale = 0;
1614         dev->vscale = 0;
1615         dev->ctl_input = 2;
1616
1617         /* setup video picture settings for saa7113h */
1618         memset(&dev->vpic, 0, sizeof(dev->vpic));
1619         dev->vpic.colour = 128 << 8;
1620         dev->vpic.hue = 128 << 8;
1621         dev->vpic.brightness = 128 << 8;
1622         dev->vpic.contrast = 192 << 8;
1623         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1624         dev->vpic.depth = 16;
1625         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1626
1627         /* compute alternate max packet sizes */
1628         uif = dev->udev->actconfig->interface[0];
1629         dev->alt_max_pkt_size[0] = 0;
1630         for (i = 1; i <= EM2820_MAX_ALT && i < uif->num_altsetting ; i++) {
1631                 u16 tmp =
1632                     le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1633                                 wMaxPacketSize);
1634                 dev->alt_max_pkt_size[i] =
1635                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1636         }
1637
1638 #ifdef CONFIG_MODULES
1639         /* request some modules */
1640         if (dev->decoder == EM2820_SAA7113)
1641                 request_module("saa7113");
1642         if (dev->decoder == EM2820_SAA7114)
1643                 request_module("saa7114");
1644         if (dev->decoder == EM2820_TVP5150)
1645                 request_module("tvp5150");
1646         if (dev->has_tuner)
1647                 request_module("tuner");
1648         if (dev->tda9887_conf)
1649                 request_module("tda9887");
1650 #endif
1651         errCode = em2820_config(dev);
1652         if (errCode) {
1653                 em2820_errdev("error configuring device\n");
1654                 kfree(dev);
1655                 return -ENOMEM;
1656         }
1657
1658         down(&dev->lock);
1659         /* register i2c bus */
1660         em2820_i2c_register(dev);
1661
1662         /* Do board specific init and eeprom reading */
1663         em2820_card_setup(dev);
1664
1665         /* configure the device */
1666         em2820_config_i2c(dev);
1667
1668         up(&dev->lock);
1669
1670         errCode = em2820_config(dev);
1671
1672 #ifdef CONFIG_MODULES
1673         if (dev->has_msp34xx)
1674                 request_module("msp3400");
1675 #endif
1676         /* allocate and fill v4l2 device struct */
1677         dev->vdev = video_device_alloc();
1678         if (NULL == dev->vdev) {
1679                 em2820_errdev("cannot allocate video_device.\n");
1680                 kfree(dev);
1681                 return -ENOMEM;
1682         }
1683
1684         dev->vdev->owner = THIS_MODULE;
1685         dev->vdev->type = VID_TYPE_CAPTURE;
1686         if (dev->has_tuner)
1687                 dev->vdev->type |= VID_TYPE_TUNER;
1688         dev->vdev->hardware = 0;
1689         dev->vdev->fops = &em2820_v4l_fops;
1690         dev->vdev->minor = -1;
1691         dev->vdev->dev = &dev->udev->dev;
1692         dev->vdev->release = video_device_release;
1693         snprintf(dev->vdev->name, sizeof(dev->vdev->name), "%s",
1694                  "em2820 video");
1695         list_add_tail(&dev->devlist,&em2820_devlist);
1696
1697         /* register v4l2 device */
1698         down(&dev->lock);
1699         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER, -1))) {
1700                 em2820_errdev("unable to register video device (error=%i).\n",
1701                               retval);
1702                 up(&dev->lock);
1703                 list_del(&dev->devlist);
1704                 video_device_release(dev->vdev);
1705                 kfree(dev);
1706                 return -ENODEV;
1707         }
1708         if (dev->has_msp34xx) {
1709                 /* Send a reset to other chips via gpio */
1710                 em2820_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1711                 udelay(2500);
1712                 em2820_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1713                 udelay(2500);
1714
1715         }
1716         video_mux(dev, 0);
1717
1718         up(&dev->lock);
1719
1720         em2820_info("V4L2 device registered as /dev/video%d\n",
1721                     dev->vdev->minor);
1722
1723         return 0;
1724 }
1725
1726 /*
1727  * em2820_usb_probe()
1728  * checks for supported devices
1729  */
1730 static int em2820_usb_probe(struct usb_interface *interface,
1731                             const struct usb_device_id *id)
1732 {
1733         const struct usb_endpoint_descriptor *endpoint;
1734         struct usb_device *udev;
1735         struct em2820 *dev = NULL;
1736         int retval = -ENODEV;
1737         int model,i,nr,ifnum;
1738
1739         udev = usb_get_dev(interface_to_usbdev(interface));
1740         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1741
1742         em2820_err(DRIVER_NAME " new device (%04x:%04x): interface %i, class %i\n",
1743                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1744                         ifnum,
1745                         interface->altsetting[0].desc.bInterfaceClass);
1746
1747         /* Don't register audio interfaces */
1748         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO)
1749                 return -ENODEV;
1750
1751         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1752
1753         /* check if the the device has the iso in endpoint at the correct place */
1754         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1755             USB_ENDPOINT_XFER_ISOC) {
1756                 em2820_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1757                 return -ENODEV;
1758         }
1759         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1760                 em2820_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1761                 return -ENODEV;
1762         }
1763
1764         model=id->driver_info;
1765         nr=interface->minor;
1766
1767         if (nr>EM2820_MAXBOARDS) {
1768                 printk ("em2820: Supports only %i em28xx boards.\n",EM2820_MAXBOARDS);
1769                 return -ENOMEM;
1770         }
1771
1772         /* allocate memory for our device state and initialize it */
1773         dev = kmalloc(sizeof(*dev), GFP_KERNEL);
1774         if (dev == NULL) {
1775                 em2820_err(DRIVER_NAME ": out of memory!\n");
1776                 return -ENOMEM;
1777         }
1778         memset(dev, 0, sizeof(*dev));
1779
1780         snprintf(dev->name, 29, "em2820 #%d", nr);
1781
1782         if ((card[nr]>=0)&&(card[nr]<em2820_bcount))
1783                 model=card[nr];
1784
1785         if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
1786                 printk( "%s: Your board has no eeprom inside it and thus can't\n"
1787                         "%s: be autodetected.  Please pass card=<n> insmod option to\n"
1788                         "%s: workaround that.  Redirect complaints to the vendor of\n"
1789                         "%s: the TV card.  Best regards,\n"
1790                         "%s:         -- tux\n",
1791                         dev->name,dev->name,dev->name,dev->name,dev->name);
1792                 printk("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
1793                         dev->name);
1794                 for (i = 0; i < em2820_bcount; i++) {
1795                         printk("%s:    card=%d -> %s\n",
1796                                 dev->name, i, em2820_boards[i].name);
1797                 }
1798         }
1799
1800         /* allocate device struct */
1801         retval = em2820_init_dev(&dev, udev, nr, model);
1802         if (retval)
1803                 return retval;
1804
1805         em2820_info("Found %s\n", em2820_boards[model].name);
1806
1807         /* save our data pointer in this interface device */
1808         usb_set_intfdata(interface, dev);
1809         return 0;
1810 }
1811
1812 /*
1813  * em2820_usb_disconnect()
1814  * called when the device gets diconencted
1815  * video device will be unregistered on v4l2_close in case it is still open
1816  */
1817 static void em2820_usb_disconnect(struct usb_interface *interface)
1818 {
1819         struct em2820 *dev = usb_get_intfdata(interface);
1820         usb_set_intfdata(interface, NULL);
1821
1822         if (!dev)
1823                 return;
1824
1825         down_write(&em2820_disconnect);
1826
1827         down(&dev->lock);
1828
1829         em2820_info("disconnecting %s\n", dev->vdev->name);
1830
1831         wake_up_interruptible_all(&dev->open);
1832
1833         if (dev->users) {
1834                 em2820_warn
1835                     ("device /dev/video%d is open! Deregistration and memory "
1836                      "deallocation are deferred on close.\n", dev->vdev->minor);
1837                 dev->state |= DEV_MISCONFIGURED;
1838                 em2820_uninit_isoc(dev);
1839                 dev->state |= DEV_DISCONNECTED;
1840                 wake_up_interruptible(&dev->wait_frame);
1841                 wake_up_interruptible(&dev->wait_stream);
1842         } else {
1843                 dev->state |= DEV_DISCONNECTED;
1844                 em2820_release_resources(dev);
1845         }
1846
1847         up(&dev->lock);
1848
1849         if (!dev->users)
1850                 kfree(dev);
1851
1852         up_write(&em2820_disconnect);
1853
1854 }
1855
1856 static struct usb_driver em2820_usb_driver = {
1857         .owner = THIS_MODULE,
1858         .name = "em2820",
1859         .probe = em2820_usb_probe,
1860         .disconnect = em2820_usb_disconnect,
1861         .id_table = em2820_id_table,
1862 };
1863
1864 static int __init em2820_module_init(void)
1865 {
1866         int result;
1867
1868         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1869                (EM2820_VERSION_CODE >> 16) & 0xff,
1870                (EM2820_VERSION_CODE >> 8) & 0xff, EM2820_VERSION_CODE & 0xff);
1871 #ifdef SNAPSHOT
1872         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1873                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1874 #endif
1875
1876         /* register this driver with the USB subsystem */
1877         result = usb_register(&em2820_usb_driver);
1878         if (result)
1879                 em2820_err(DRIVER_NAME
1880                            " usb_register failed. Error number %d.\n", result);
1881
1882         return result;
1883 }
1884
1885 static void __exit em2820_module_exit(void)
1886 {
1887         /* deregister this driver with the USB subsystem */
1888         usb_deregister(&em2820_usb_driver);
1889 }
1890
1891 module_init(em2820_module_init);
1892 module_exit(em2820_module_exit);