drivers/media/video/em28xx/em28xx-video.c

   1 /*
   2    em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   3
   4    Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
   5                       Markus Rechberger <mrechberger@gmail.com>
   6                       Mauro Carvalho Chehab <mchehab@infradead.org>
   7                       Sascha Sommer <saschasommer@freenet.de>
   8
   9         Some parts based on SN9C10x PC Camera Controllers GPL driver made
  10                 by Luca Risolia <luca.risolia@studio.unibo.it>
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 2 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/init.h>
  28 #include <linux/list.h>
  29 #include <linux/module.h>
  30 #include <linux/kernel.h>
  31 #include <linux/bitmap.h>
  32 #include <linux/usb.h>
  33 #include <linux/i2c.h>
  34 #include <linux/version.h>
  35 #include <linux/mm.h>
  36 #include <linux/video_decoder.h>
  37 #include <linux/mutex.h>
  38
  39 #include "em28xx.h"
  40 #include <media/v4l2-common.h>
  41 #include <media/msp3400.h>
  42
  43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
  44                       "Markus Rechberger <mrechberger@gmail.com>, " \
  45                       "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
  46                       "Sascha Sommer <saschasommer@freenet.de>"
  47
  48 #define DRIVER_NAME         "em28xx"
  49 #define DRIVER_DESC         "Empia em28xx based USB video device driver"
  50 #define EM28XX_VERSION_CODE  KERNEL_VERSION(0, 0, 1)
  51
  52 #define em28xx_videodbg(fmt, arg...) do {\
  53         if (video_debug) \
  54                 printk(KERN_INFO "%s %s :"fmt, \
  55                          dev->name, __FUNCTION__ , ##arg); } while (0)
  56
  57 MODULE_AUTHOR(DRIVER_AUTHOR);
  58 MODULE_DESCRIPTION(DRIVER_DESC);
  59 MODULE_LICENSE("GPL");
  60
  61 static LIST_HEAD(em28xx_devlist);
  62
  63 static unsigned int card[]     = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  64 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  65 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
  66 module_param_array(card,  int, NULL, 0444);
  67 module_param_array(video_nr, int, NULL, 0444);
  68 module_param_array(vbi_nr, int, NULL, 0444);
  69 MODULE_PARM_DESC(card,"card type");
  70 MODULE_PARM_DESC(video_nr,"video device numbers");
  71 MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
  72
  73 static unsigned int video_debug = 0;
  74 module_param(video_debug,int,0644);
  75 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
  76
  77 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
  78 static unsigned long em28xx_devused;
  79
  80 /* supported tv norms */
  81 static struct em28xx_tvnorm tvnorms[] = {
  82         {
  83                 .name = "PAL",
  84                 .id = V4L2_STD_PAL,
  85                 .mode = VIDEO_MODE_PAL,
  86          }, {
  87                 .name = "NTSC",
  88                 .id = V4L2_STD_NTSC,
  89                 .mode = VIDEO_MODE_NTSC,
  90         }, {
  91                  .name = "SECAM",
  92                  .id = V4L2_STD_SECAM,
  93                  .mode = VIDEO_MODE_SECAM,
  94         }, {
  95                 .name = "PAL-M",
  96                 .id = V4L2_STD_PAL_M,
  97                 .mode = VIDEO_MODE_PAL,
  98         }
  99 };
 100
 101 #define TVNORMS ARRAY_SIZE(tvnorms)
 102
 103 /* supported controls */
 104 /* Common to all boards */
 105 static struct v4l2_queryctrl em28xx_qctrl[] = {
 106         {
 107                 .id = V4L2_CID_AUDIO_VOLUME,
 108                 .type = V4L2_CTRL_TYPE_INTEGER,
 109                 .name = "Volume",
 110                 .minimum = 0x0,
 111                 .maximum = 0x1f,
 112                 .step = 0x1,
 113                 .default_value = 0x1f,
 114                 .flags = 0,
 115         },{
 116                 .id = V4L2_CID_AUDIO_MUTE,
 117                 .type = V4L2_CTRL_TYPE_BOOLEAN,
 118                 .name = "Mute",
 119                 .minimum = 0,
 120                 .maximum = 1,
 121                 .step = 1,
 122                 .default_value = 1,
 123                 .flags = 0,
 124         }
 125 };
 126
 127 static struct usb_driver em28xx_usb_driver;
 128
 129 static DEFINE_MUTEX(em28xx_sysfs_lock);
 130 static DECLARE_RWSEM(em28xx_disconnect);
 131
 132 /*********************  v4l2 interface  ******************************************/
 133
 134 /*
 135  * em28xx_config()
 136  * inits registers with sane defaults
 137  */
 138 static int em28xx_config(struct em28xx *dev)
 139 {
 140
 141         /* Sets I2C speed to 100 KHz */
 142         if (!dev->is_em2800)
 143                 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
 144
 145         /* enable vbi capturing */
 146
 147 /*      em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
 148 /*      em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
 149         em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
 150
 151         em28xx_audio_usb_mute(dev, 1);
 152         dev->mute = 1;          /* maybe not the right place... */
 153         dev->volume = 0x1f;
 154         em28xx_audio_analog_set(dev);
 155         em28xx_audio_analog_setup(dev);
 156         em28xx_outfmt_set_yuv422(dev);
 157         em28xx_colorlevels_set_default(dev);
 158         em28xx_compression_disable(dev);
 159
 160         return 0;
 161 }
 162
 163 /*
 164  * em28xx_config_i2c()
 165  * configure i2c attached devices
 166  */
 167 static void em28xx_config_i2c(struct em28xx *dev)
 168 {
 169         struct v4l2_routing route;
 170
 171         route.input = INPUT(dev->ctl_input)->vmux;
 172         route.output = 0;
 173         em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
 174         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 175         em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 176 }
 177
 178 /*
 179  * em28xx_empty_framequeues()
 180  * prepare queues for incoming and outgoing frames
 181  */
 182 static void em28xx_empty_framequeues(struct em28xx *dev)
 183 {
 184         u32 i;
 185
 186         INIT_LIST_HEAD(&dev->inqueue);
 187         INIT_LIST_HEAD(&dev->outqueue);
 188
 189         for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
 190                 dev->frame[i].state = F_UNUSED;
 191                 dev->frame[i].buf.bytesused = 0;
 192         }
 193 }
 194
 195 static void video_mux(struct em28xx *dev, int index)
 196 {
 197         int ainput;
 198         struct v4l2_routing route;
 199
 200         route.input = INPUT(index)->vmux;
 201         route.output = 0;
 202         dev->ctl_input = index;
 203         dev->ctl_ainput = INPUT(index)->amux;
 204
 205         em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 206
 207         em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput);
 208
 209         if (dev->has_msp34xx) {
 210                 if (dev->i2s_speed)
 211                         em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 212                 route.input = dev->ctl_ainput;
 213                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 214                 /* Note: this is msp3400 specific */
 215                 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
 216                 ainput = EM28XX_AUDIO_SRC_TUNER;
 217                 em28xx_audio_source(dev, ainput);
 218         } else {
 219                 switch (dev->ctl_ainput) {
 220                         case 0:
 221                                 ainput = EM28XX_AUDIO_SRC_TUNER;
 222                                 break;
 223                         default:
 224                                 ainput = EM28XX_AUDIO_SRC_LINE;
 225                 }
 226                 em28xx_audio_source(dev, ainput);
 227         }
 228 }
 229
 230 /*
 231  * em28xx_v4l2_open()
 232  * inits the device and starts isoc transfer
 233  */
 234 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 235 {
 236         int minor = iminor(inode);
 237         int errCode = 0;
 238         struct em28xx *h,*dev = NULL;
 239
 240         list_for_each_entry(h, &em28xx_devlist, devlist) {
 241                 if (h->vdev->minor == minor) {
 242                         dev  = h;
 243                         dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 244                 }
 245                 if (h->vbi_dev->minor == minor) {
 246                         dev  = h;
 247                         dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
 248                 }
 249         }
 250         if (NULL == dev)
 251                 return -ENODEV;
 252
 253         em28xx_videodbg("open minor=%d type=%s users=%d\n",
 254                                 minor,v4l2_type_names[dev->type],dev->users);
 255
 256         if (!down_read_trylock(&em28xx_disconnect))
 257                 return -ERESTARTSYS;
 258
 259         if (dev->users) {
 260                 em28xx_warn("this driver can be opened only once\n");
 261                 up_read(&em28xx_disconnect);
 262                 return -EBUSY;
 263         }
 264
 265         mutex_init(&dev->fileop_lock);  /* to 1 == available */
 266         spin_lock_init(&dev->queue_lock);
 267         init_waitqueue_head(&dev->wait_frame);
 268         init_waitqueue_head(&dev->wait_stream);
 269
 270         mutex_lock(&dev->lock);
 271
 272         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 273                 em28xx_set_alternate(dev);
 274
 275                 dev->width = norm_maxw(dev);
 276                 dev->height = norm_maxh(dev);
 277                 dev->frame_size = dev->width * dev->height * 2;
 278                 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 279                 dev->bytesperline = dev->width * 2;
 280                 dev->hscale = 0;
 281                 dev->vscale = 0;
 282
 283                 em28xx_capture_start(dev, 1);
 284                 em28xx_resolution_set(dev);
 285
 286                 /* device needs to be initialized before isoc transfer */
 287                 video_mux(dev, 0);
 288
 289                 /* start the transfer */
 290                 errCode = em28xx_init_isoc(dev);
 291                 if (errCode)
 292                         goto err;
 293
 294         }
 295
 296         dev->users++;
 297         filp->private_data = dev;
 298         dev->io = IO_NONE;
 299         dev->stream = STREAM_OFF;
 300         dev->num_frames = 0;
 301
 302         /* prepare queues */
 303         em28xx_empty_framequeues(dev);
 304
 305         dev->state |= DEV_INITIALIZED;
 306
 307 err:
 308         mutex_unlock(&dev->lock);
 309         up_read(&em28xx_disconnect);
 310         return errCode;
 311 }
 312
 313 /*
 314  * em28xx_realease_resources()
 315  * unregisters the v4l2,i2c and usb devices
 316  * called when the device gets disconected or at module unload
 317 */
 318 static void em28xx_release_resources(struct em28xx *dev)
 319 {
 320         mutex_lock(&em28xx_sysfs_lock);
 321
 322         /*FIXME: I2C IR should be disconnected */
 323
 324         em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
 325                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
 326                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
 327         list_del(&dev->devlist);
 328         video_unregister_device(dev->vdev);
 329         video_unregister_device(dev->vbi_dev);
 330         em28xx_i2c_unregister(dev);
 331         usb_put_dev(dev->udev);
 332         mutex_unlock(&em28xx_sysfs_lock);
 333
 334
 335         /* Mark device as unused */
 336         em28xx_devused&=~(1<<dev->devno);
 337 }
 338
 339 /*
 340  * em28xx_v4l2_close()
 341  * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
 342  */
 343 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
 344 {
 345         int errCode;
 346         struct em28xx *dev=filp->private_data;
 347
 348         em28xx_videodbg("users=%d\n", dev->users);
 349
 350         mutex_lock(&dev->lock);
 351
 352         em28xx_uninit_isoc(dev);
 353
 354         em28xx_release_buffers(dev);
 355
 356         /* the device is already disconnect, free the remaining resources */
 357         if (dev->state & DEV_DISCONNECTED) {
 358                 em28xx_release_resources(dev);
 359                 mutex_unlock(&dev->lock);
 360                 kfree(dev);
 361                 return 0;
 362         }
 363
 364         /* set alternate 0 */
 365         dev->alt = 0;
 366         em28xx_videodbg("setting alternate 0\n");
 367         errCode = usb_set_interface(dev->udev, 0, 0);
 368         if (errCode < 0) {
 369                 em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
 370                      errCode);
 371         }
 372
 373         dev->users--;
 374         wake_up_interruptible_nr(&dev->open, 1);
 375         mutex_unlock(&dev->lock);
 376         return 0;
 377 }
 378
 379 /*
 380  * em28xx_v4l2_read()
 381  * will allocate buffers when called for the first time
 382  */
 383 static ssize_t
 384 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
 385                  loff_t * f_pos)
 386 {
 387         struct em28xx_frame_t *f, *i;
 388         unsigned long lock_flags;
 389         int ret = 0;
 390         struct em28xx *dev = filp->private_data;
 391
 392         if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 393                 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
 394         }
 395         if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 396                 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
 397                 em28xx_videodbg("not supported yet! ...\n");
 398                 if (copy_to_user(buf, "", 1)) {
 399                         mutex_unlock(&dev->fileop_lock);
 400                         return -EFAULT;
 401                 }
 402                 return (1);
 403         }
 404         if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 405                 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
 406                 em28xx_videodbg("not supported yet! ...\n");
 407                 if (copy_to_user(buf, "", 1)) {
 408                         mutex_unlock(&dev->fileop_lock);
 409                         return -EFAULT;
 410                 }
 411                 return (1);
 412         }
 413
 414         if (mutex_lock_interruptible(&dev->fileop_lock))
 415                 return -ERESTARTSYS;
 416
 417         if (dev->state & DEV_DISCONNECTED) {
 418                 em28xx_videodbg("device not present\n");
 419                 mutex_unlock(&dev->fileop_lock);
 420                 return -ENODEV;
 421         }
 422
 423         if (dev->state & DEV_MISCONFIGURED) {
 424                 em28xx_videodbg("device misconfigured; close and open it again\n");
 425                 mutex_unlock(&dev->fileop_lock);
 426                 return -EIO;
 427         }
 428
 429         if (dev->io == IO_MMAP) {
 430                 em28xx_videodbg ("IO method is set to mmap; close and open"
 431                                 " the device again to choose the read method\n");
 432                 mutex_unlock(&dev->fileop_lock);
 433                 return -EINVAL;
 434         }
 435
 436         if (dev->io == IO_NONE) {
 437                 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
 438                         em28xx_errdev("read failed, not enough memory\n");
 439                         mutex_unlock(&dev->fileop_lock);
 440                         return -ENOMEM;
 441                 }
 442                 dev->io = IO_READ;
 443                 dev->stream = STREAM_ON;
 444                 em28xx_queue_unusedframes(dev);
 445         }
 446
 447         if (!count) {
 448                 mutex_unlock(&dev->fileop_lock);
 449                 return 0;
 450         }
 451
 452         if (list_empty(&dev->outqueue)) {
 453                 if (filp->f_flags & O_NONBLOCK) {
 454                         mutex_unlock(&dev->fileop_lock);
 455                         return -EAGAIN;
 456                 }
 457                 ret = wait_event_interruptible
 458                     (dev->wait_frame,
 459                      (!list_empty(&dev->outqueue)) ||
 460                      (dev->state & DEV_DISCONNECTED));
 461                 if (ret) {
 462                         mutex_unlock(&dev->fileop_lock);
 463                         return ret;
 464                 }
 465                 if (dev->state & DEV_DISCONNECTED) {
 466                         mutex_unlock(&dev->fileop_lock);
 467                         return -ENODEV;
 468                 }
 469         }
 470
 471         f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
 472
 473         spin_lock_irqsave(&dev->queue_lock, lock_flags);
 474         list_for_each_entry(i, &dev->outqueue, frame)
 475             i->state = F_UNUSED;
 476         INIT_LIST_HEAD(&dev->outqueue);
 477         spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
 478
 479         em28xx_queue_unusedframes(dev);
 480
 481         if (count > f->buf.length)
 482                 count = f->buf.length;
 483
 484         if (copy_to_user(buf, f->bufmem, count)) {
 485                 mutex_unlock(&dev->fileop_lock);
 486                 return -EFAULT;
 487         }
 488         *f_pos += count;
 489
 490         mutex_unlock(&dev->fileop_lock);
 491
 492         return count;
 493 }
 494
 495 /*
 496  * em28xx_v4l2_poll()
 497  * will allocate buffers when called for the first time
 498  */
 499 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
 500 {
 501         unsigned int mask = 0;
 502         struct em28xx *dev = filp->private_data;
 503
 504         if (mutex_lock_interruptible(&dev->fileop_lock))
 505                 return POLLERR;
 506
 507         if (dev->state & DEV_DISCONNECTED) {
 508                 em28xx_videodbg("device not present\n");
 509         } else if (dev->state & DEV_MISCONFIGURED) {
 510                 em28xx_videodbg("device is misconfigured; close and open it again\n");
 511         } else {
 512                 if (dev->io == IO_NONE) {
 513                         if (!em28xx_request_buffers
 514                             (dev, EM28XX_NUM_READ_FRAMES)) {
 515                                 em28xx_warn
 516                                     ("poll() failed, not enough memory\n");
 517                         } else {
 518                                 dev->io = IO_READ;
 519                                 dev->stream = STREAM_ON;
 520                         }
 521                 }
 522
 523                 if (dev->io == IO_READ) {
 524                         em28xx_queue_unusedframes(dev);
 525                         poll_wait(filp, &dev->wait_frame, wait);
 526
 527                         if (!list_empty(&dev->outqueue))
 528                                 mask |= POLLIN | POLLRDNORM;
 529
 530                         mutex_unlock(&dev->fileop_lock);
 531
 532                         return mask;
 533                 }
 534         }
 535
 536         mutex_unlock(&dev->fileop_lock);
 537         return POLLERR;
 538 }
 539
 540 /*
 541  * em28xx_vm_open()
 542  */
 543 static void em28xx_vm_open(struct vm_area_struct *vma)
 544 {
 545         struct em28xx_frame_t *f = vma->vm_private_data;
 546         f->vma_use_count++;
 547 }
 548
 549 /*
 550  * em28xx_vm_close()
 551  */
 552 static void em28xx_vm_close(struct vm_area_struct *vma)
 553 {
 554         /* NOTE: buffers are not freed here */
 555         struct em28xx_frame_t *f = vma->vm_private_data;
 556
 557         if (f->vma_use_count)
 558                 f->vma_use_count--;
 559 }
 560
 561 static struct vm_operations_struct em28xx_vm_ops = {
 562         .open = em28xx_vm_open,
 563         .close = em28xx_vm_close,
 564 };
 565
 566 /*
 567  * em28xx_v4l2_mmap()
 568  */
 569 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 570 {
 571         unsigned long size = vma->vm_end - vma->vm_start,
 572             start = vma->vm_start;
 573         void *pos;
 574         u32 i;
 575
 576         struct em28xx *dev = filp->private_data;
 577
 578         if (mutex_lock_interruptible(&dev->fileop_lock))
 579                 return -ERESTARTSYS;
 580
 581         if (dev->state & DEV_DISCONNECTED) {
 582                 em28xx_videodbg("mmap: device not present\n");
 583                 mutex_unlock(&dev->fileop_lock);
 584                 return -ENODEV;
 585         }
 586
 587         if (dev->state & DEV_MISCONFIGURED) {
 588                 em28xx_videodbg ("mmap: Device is misconfigured; close and "
 589                                                 "open it again\n");
 590                 mutex_unlock(&dev->fileop_lock);
 591                 return -EIO;
 592         }
 593
 594         if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
 595             size != PAGE_ALIGN(dev->frame[0].buf.length)) {
 596                 mutex_unlock(&dev->fileop_lock);
 597                 return -EINVAL;
 598         }
 599
 600         for (i = 0; i < dev->num_frames; i++) {
 601                 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
 602                         break;
 603         }
 604         if (i == dev->num_frames) {
 605                 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
 606                 mutex_unlock(&dev->fileop_lock);
 607                 return -EINVAL;
 608         }
 609
 610         /* VM_IO is eventually going to replace PageReserved altogether */
 611         vma->vm_flags |= VM_IO;
 612         vma->vm_flags |= VM_RESERVED;   /* avoid to swap out this VMA */
 613
 614         pos = dev->frame[i].bufmem;
 615         while (size > 0) {      /* size is page-aligned */
 616                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
 617                         em28xx_videodbg("mmap: vm_insert_page failed\n");
 618                         mutex_unlock(&dev->fileop_lock);
 619                         return -EAGAIN;
 620                 }
 621                 start += PAGE_SIZE;
 622                 pos += PAGE_SIZE;
 623                 size -= PAGE_SIZE;
 624         }
 625
 626         vma->vm_ops = &em28xx_vm_ops;
 627         vma->vm_private_data = &dev->frame[i];
 628
 629         em28xx_vm_open(vma);
 630         mutex_unlock(&dev->fileop_lock);
 631         return 0;
 632 }
 633
 634 /*
 635  * em28xx_get_ctrl()
 636  * return the current saturation, brightness or contrast, mute state
 637  */
 638 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
 639 {
 640         switch (ctrl->id) {
 641         case V4L2_CID_AUDIO_MUTE:
 642                 ctrl->value = dev->mute;
 643                 return 0;
 644         case V4L2_CID_AUDIO_VOLUME:
 645                 ctrl->value = dev->volume;
 646                 return 0;
 647         default:
 648                 return -EINVAL;
 649         }
 650 }
 651
 652 /*
 653  * em28xx_set_ctrl()
 654  * mute or set new saturation, brightness or contrast
 655  */
 656 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
 657 {
 658         switch (ctrl->id) {
 659         case V4L2_CID_AUDIO_MUTE:
 660                 if (ctrl->value != dev->mute) {
 661                         dev->mute = ctrl->value;
 662                         em28xx_audio_usb_mute(dev, ctrl->value);
 663                         return em28xx_audio_analog_set(dev);
 664                 }
 665                 return 0;
 666         case V4L2_CID_AUDIO_VOLUME:
 667                 dev->volume = ctrl->value;
 668                 return em28xx_audio_analog_set(dev);
 669         default:
 670                 return -EINVAL;
 671         }
 672 }
 673
 674 /*
 675  * em28xx_stream_interrupt()
 676  * stops streaming
 677  */
 678 static int em28xx_stream_interrupt(struct em28xx *dev)
 679 {
 680         int ret = 0;
 681
 682         /* stop reading from the device */
 683
 684         dev->stream = STREAM_INTERRUPT;
 685         ret = wait_event_timeout(dev->wait_stream,
 686                                  (dev->stream == STREAM_OFF) ||
 687                                  (dev->state & DEV_DISCONNECTED),
 688                                  EM28XX_URB_TIMEOUT);
 689         if (dev->state & DEV_DISCONNECTED)
 690                 return -ENODEV;
 691         else if (ret) {
 692                 dev->state |= DEV_MISCONFIGURED;
 693                 em28xx_videodbg("device is misconfigured; close and "
 694                         "open /dev/video%d again\n",
 695                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
 696                 return ret;
 697         }
 698
 699         return 0;
 700 }
 701
 702 static int em28xx_set_norm(struct em28xx *dev, int width, int height)
 703 {
 704         unsigned int hscale, vscale;
 705         unsigned int maxh, maxw;
 706
 707         maxw = norm_maxw(dev);
 708         maxh = norm_maxh(dev);
 709
 710         /* width must even because of the YUYV format */
 711         /* height must be even because of interlacing */
 712         height &= 0xfffe;
 713         width &= 0xfffe;
 714
 715         if (height < 32)
 716                 height = 32;
 717         if (height > maxh)
 718                 height = maxh;
 719         if (width < 48)
 720                 width = 48;
 721         if (width > maxw)
 722                 width = maxw;
 723
 724         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 725                 hscale = 0x3fff;
 726         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 727
 728         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 729                 vscale = 0x3fff;
 730         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 731
 732         /* set new image size */
 733         dev->width = width;
 734         dev->height = height;
 735         dev->frame_size = dev->width * dev->height * 2;
 736         dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
 737         dev->bytesperline = dev->width * 2;
 738         dev->hscale = hscale;
 739         dev->vscale = vscale;
 740
 741         em28xx_resolution_set(dev);
 742
 743         return 0;
 744 }
 745
 746 static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
 747 {
 748         em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
 749                 (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
 750                 "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 751                 (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
 752                 "V4L2_BUF_TYPE_VBI_CAPTURE" :
 753                 (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
 754                 "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
 755                 "not supported");
 756
 757         switch (format->type) {
 758         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 759         {
 760                 format->fmt.pix.width = dev->width;
 761                 format->fmt.pix.height = dev->height;
 762                 format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 763                 format->fmt.pix.bytesperline = dev->bytesperline;
 764                 format->fmt.pix.sizeimage = dev->frame_size;
 765                 format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 766                 format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;       /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
 767
 768                 em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
 769                         dev->height);
 770                 break;
 771         }
 772
 773         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 774         {
 775                 format->fmt.sliced.service_set=0;
 776
 777                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 778
 779                 if (format->fmt.sliced.service_set==0)
 780                         return -EINVAL;
 781
 782                 break;
 783         }
 784
 785         default:
 786                 return -EINVAL;
 787         }
 788         return (0);
 789 }
 790
 791 static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
 792 {
 793         u32 i;
 794         int ret = 0;
 795         int width = format->fmt.pix.width;
 796         int height = format->fmt.pix.height;
 797         unsigned int hscale, vscale;
 798         unsigned int maxh, maxw;
 799
 800         maxw = norm_maxw(dev);
 801         maxh = norm_maxh(dev);
 802
 803         em28xx_videodbg("%s: type=%s\n",
 804                         cmd == VIDIOC_TRY_FMT ?
 805                         "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 806                         format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
 807                         "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
 808                         format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
 809                         "V4L2_BUF_TYPE_VBI_CAPTURE " :
 810                         "not supported");
 811
 812         if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
 813                 em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
 814
 815                 if (format->fmt.sliced.service_set==0)
 816                         return -EINVAL;
 817
 818                 return 0;
 819         }
 820
 821
 822         if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 823                 return -EINVAL;
 824
 825         em28xx_videodbg("%s: requested %dx%d\n",
 826                 cmd == VIDIOC_TRY_FMT ?
 827                 "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
 828                 format->fmt.pix.width, format->fmt.pix.height);
 829
 830         /* FIXME: Move some code away from here */
 831         /* width must even because of the YUYV format */
 832         /* height must be even because of interlacing */
 833         height &= 0xfffe;
 834         width &= 0xfffe;
 835
 836         if (height < 32)
 837                 height = 32;
 838         if (height > maxh)
 839                 height = maxh;
 840         if (width < 48)
 841                 width = 48;
 842         if (width > maxw)
 843                 width = maxw;
 844
 845         if(dev->is_em2800){
 846                 /* the em2800 can only scale down to 50% */
 847                 if(height % (maxh / 2))
 848                         height=maxh;
 849                 if(width % (maxw / 2))
 850                         width=maxw;
 851                 /* according to empiatech support */
 852                 /* the MaxPacketSize is to small to support */
 853                 /* framesizes larger than 640x480 @ 30 fps */
 854                 /* or 640x576 @ 25 fps. As this would cut */
 855                 /* of a part of the image we prefer */
 856                 /* 360x576 or 360x480 for now */
 857                 if(width == maxw && height == maxh)
 858                         width /= 2;
 859         }
 860
 861         if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
 862                 hscale = 0x3fff;
 863
 864         width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
 865
 866         if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
 867                 vscale = 0x3fff;
 868
 869         height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
 870
 871         format->fmt.pix.width = width;
 872         format->fmt.pix.height = height;
 873         format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
 874         format->fmt.pix.bytesperline = width * 2;
 875         format->fmt.pix.sizeimage = width * 2 * height;
 876         format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 877         format->fmt.pix.field = V4L2_FIELD_INTERLACED;
 878
 879         em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
 880                 cmd == VIDIOC_TRY_FMT ?
 881                 "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
 882                 format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
 883
 884         if (cmd == VIDIOC_TRY_FMT)
 885                 return 0;
 886
 887         for (i = 0; i < dev->num_frames; i++)
 888                 if (dev->frame[i].vma_use_count) {
 889                         em28xx_videodbg("VIDIOC_S_FMT failed. "
 890                                 "Unmap the buffers first.\n");
 891                         return -EINVAL;
 892                 }
 893
 894         /* stop io in case it is already in progress */
 895         if (dev->stream == STREAM_ON) {
 896                 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
 897                 if ((ret = em28xx_stream_interrupt(dev)))
 898                         return ret;
 899         }
 900
 901         em28xx_release_buffers(dev);
 902         dev->io = IO_NONE;
 903
 904         /* set new image size */
 905         dev->width = width;
 906         dev->height = height;
 907         dev->frame_size = dev->width * dev->height * 2;
 908         dev->field_size = dev->frame_size >> 1;
 909         dev->bytesperline = dev->width * 2;
 910         dev->hscale = hscale;
 911         dev->vscale = vscale;
 912         em28xx_uninit_isoc(dev);
 913         em28xx_set_alternate(dev);
 914         em28xx_capture_start(dev, 1);
 915         em28xx_resolution_set(dev);
 916         em28xx_init_isoc(dev);
 917
 918         return 0;
 919 }
 920
 921 /*
 922  * em28xx_v4l2_do_ioctl()
 923  * This function is _not_ called directly, but from
 924  * em28xx_v4l2_ioctl. Userspace
 925  * copying is done already, arg is a kernel pointer.
 926  */
 927 static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
 928                            struct em28xx *dev, unsigned int cmd, void *arg,
 929                            v4l2_kioctl driver_ioctl)
 930 {
 931         int ret;
 932
 933         switch (cmd) {
 934                 /* ---------- tv norms ---------- */
 935         case VIDIOC_ENUMSTD:
 936         {
 937                 struct v4l2_standard *e = arg;
 938                 unsigned int i;
 939
 940                 i = e->index;
 941                 if (i >= TVNORMS)
 942                         return -EINVAL;
 943                 ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
 944                                                 tvnorms[e->index].name);
 945                 e->index = i;
 946                 if (ret < 0)
 947                         return ret;
 948                 return 0;
 949         }
 950         case VIDIOC_G_STD:
 951         {
 952                 v4l2_std_id *id = arg;
 953
 954                 *id = dev->tvnorm->id;
 955                 return 0;
 956         }
 957         case VIDIOC_S_STD:
 958         {
 959                 v4l2_std_id *id = arg;
 960                 unsigned int i;
 961
 962                 for (i = 0; i < TVNORMS; i++)
 963                         if (*id == tvnorms[i].id)
 964                                 break;
 965                 if (i == TVNORMS)
 966                         for (i = 0; i < TVNORMS; i++)
 967                                 if (*id & tvnorms[i].id)
 968                                         break;
 969                 if (i == TVNORMS)
 970                         return -EINVAL;
 971
 972                 mutex_lock(&dev->lock);
 973                 dev->tvnorm = &tvnorms[i];
 974
 975                 em28xx_set_norm(dev, dev->width, dev->height);
 976
 977                 em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
 978                                         &dev->tvnorm->id);
 979
 980                 mutex_unlock(&dev->lock);
 981
 982                 return 0;
 983         }
 984
 985         /* ------ input switching ---------- */
 986         case VIDIOC_ENUMINPUT:
 987         {
 988                 struct v4l2_input *i = arg;
 989                 unsigned int n;
 990                 static const char *iname[] = {
 991                         [EM28XX_VMUX_COMPOSITE1] = "Composite1",
 992                         [EM28XX_VMUX_COMPOSITE2] = "Composite2",
 993                         [EM28XX_VMUX_COMPOSITE3] = "Composite3",
 994                         [EM28XX_VMUX_COMPOSITE4] = "Composite4",
 995                         [EM28XX_VMUX_SVIDEO] = "S-Video",
 996                         [EM28XX_VMUX_TELEVISION] = "Television",
 997                         [EM28XX_VMUX_CABLE] = "Cable TV",
 998                         [EM28XX_VMUX_DVB] = "DVB",
 999                         [EM28XX_VMUX_DEBUG] = "for debug only",
1000                 };
1001
1002                 n = i->index;
1003                 if (n >= MAX_EM28XX_INPUT)
1004                         return -EINVAL;
1005                 if (0 == INPUT(n)->type)
1006                         return -EINVAL;
1007                 memset(i, 0, sizeof(*i));
1008                 i->index = n;
1009                 i->type = V4L2_INPUT_TYPE_CAMERA;
1010                 strcpy(i->name, iname[INPUT(n)->type]);
1011                 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1012                         (EM28XX_VMUX_CABLE == INPUT(n)->type))
1013                         i->type = V4L2_INPUT_TYPE_TUNER;
1014                 for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
1015                         i->std |= tvnorms[n].id;
1016                 return 0;
1017         }
1018         case VIDIOC_G_INPUT:
1019         {
1020                 int *i = arg;
1021                 *i = dev->ctl_input;
1022
1023                 return 0;
1024         }
1025         case VIDIOC_S_INPUT:
1026         {
1027                 int *index = arg;
1028
1029                 if (*index >= MAX_EM28XX_INPUT)
1030                         return -EINVAL;
1031                 if (0 == INPUT(*index)->type)
1032                         return -EINVAL;
1033
1034                 mutex_lock(&dev->lock);
1035                 video_mux(dev, *index);
1036                 mutex_unlock(&dev->lock);
1037
1038                 return 0;
1039         }
1040         case VIDIOC_G_AUDIO:
1041         {
1042                 struct v4l2_audio *a = arg;
1043                 unsigned int index = a->index;
1044
1045                 if (a->index > 1)
1046                         return -EINVAL;
1047                 memset(a, 0, sizeof(*a));
1048                 index = dev->ctl_ainput;
1049
1050                 if (index == 0) {
1051                         strcpy(a->name, "Television");
1052                 } else {
1053                         strcpy(a->name, "Line In");
1054                 }
1055                 a->capability = V4L2_AUDCAP_STEREO;
1056                 a->index = index;
1057                 return 0;
1058         }
1059         case VIDIOC_S_AUDIO:
1060         {
1061                 struct v4l2_audio *a = arg;
1062
1063                 if (a->index != dev->ctl_ainput)
1064                         return -EINVAL;
1065
1066                 return 0;
1067         }
1068
1069         /* --- controls ---------------------------------------------- */
1070         case VIDIOC_QUERYCTRL:
1071         {
1072                 struct v4l2_queryctrl *qc = arg;
1073                 int i, id=qc->id;
1074
1075                 memset(qc,0,sizeof(*qc));
1076                 qc->id=id;
1077
1078                 if (!dev->has_msp34xx) {
1079                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1080                                 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1081                                         memcpy(qc, &(em28xx_qctrl[i]),
1082                                         sizeof(*qc));
1083                                         return 0;
1084                                 }
1085                         }
1086                 }
1087                 em28xx_i2c_call_clients(dev,cmd,qc);
1088                 if (qc->type)
1089                         return 0;
1090                 else
1091                         return -EINVAL;
1092         }
1093         case VIDIOC_G_CTRL:
1094         {
1095                 struct v4l2_control *ctrl = arg;
1096                 int retval=-EINVAL;
1097
1098                 if (!dev->has_msp34xx)
1099                         retval=em28xx_get_ctrl(dev, ctrl);
1100                 if (retval==-EINVAL) {
1101                         em28xx_i2c_call_clients(dev,cmd,arg);
1102                         return 0;
1103                 } else return retval;
1104         }
1105         case VIDIOC_S_CTRL:
1106         {
1107                 struct v4l2_control *ctrl = arg;
1108                 u8 i;
1109
1110                 if (!dev->has_msp34xx){
1111                         for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1112                                 if (ctrl->id == em28xx_qctrl[i].id) {
1113                                         if (ctrl->value <
1114                                         em28xx_qctrl[i].minimum
1115                                         || ctrl->value >
1116                                         em28xx_qctrl[i].maximum)
1117                                                 return -ERANGE;
1118                                         return em28xx_set_ctrl(dev, ctrl);
1119                                 }
1120                         }
1121                 }
1122
1123                 em28xx_i2c_call_clients(dev,cmd,arg);
1124                 return 0;
1125         }
1126         /* --- tuner ioctls ------------------------------------------ */
1127         case VIDIOC_G_TUNER:
1128         {
1129                 struct v4l2_tuner *t = arg;
1130
1131                 if (0 != t->index)
1132                         return -EINVAL;
1133
1134                 memset(t, 0, sizeof(*t));
1135                 strcpy(t->name, "Tuner");
1136                 mutex_lock(&dev->lock);
1137                 /* let clients fill in the remainder of this struct */
1138                 em28xx_i2c_call_clients(dev, cmd, t);
1139                 mutex_unlock(&dev->lock);
1140                 em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
1141                                 t->afc);
1142                 return 0;
1143         }
1144         case VIDIOC_S_TUNER:
1145         {
1146                 struct v4l2_tuner *t = arg;
1147
1148                 if (0 != t->index)
1149                         return -EINVAL;
1150                 mutex_lock(&dev->lock);
1151                 /* let clients handle this */
1152                 em28xx_i2c_call_clients(dev, cmd, t);
1153                 mutex_unlock(&dev->lock);
1154                 return 0;
1155         }
1156         case VIDIOC_G_FREQUENCY:
1157         {
1158                 struct v4l2_frequency *f = arg;
1159
1160                 memset(f, 0, sizeof(*f));
1161                 f->type = V4L2_TUNER_ANALOG_TV;
1162                 f->frequency = dev->ctl_freq;
1163
1164                 return 0;
1165         }
1166         case VIDIOC_S_FREQUENCY:
1167         {
1168                 struct v4l2_frequency *f = arg;
1169
1170                 if (0 != f->tuner)
1171                         return -EINVAL;
1172
1173                 if (V4L2_TUNER_ANALOG_TV != f->type)
1174                         return -EINVAL;
1175
1176                 mutex_lock(&dev->lock);
1177                 dev->ctl_freq = f->frequency;
1178                 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1179                 mutex_unlock(&dev->lock);
1180                 return 0;
1181         }
1182         case VIDIOC_CROPCAP:
1183         {
1184                 struct v4l2_cropcap *cc = arg;
1185
1186                 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1187                         return -EINVAL;
1188                 cc->bounds.left = 0;
1189                 cc->bounds.top = 0;
1190                 cc->bounds.width = dev->width;
1191                 cc->bounds.height = dev->height;
1192                 cc->defrect = cc->bounds;
1193                 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1194                 cc->pixelaspect.denominator = 59;
1195                 return 0;
1196         }
1197         case VIDIOC_STREAMON:
1198         {
1199                 int *type = arg;
1200
1201                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1202                         || dev->io != IO_MMAP)
1203                         return -EINVAL;
1204
1205                 if (list_empty(&dev->inqueue))
1206                         return -EINVAL;
1207
1208                 dev->stream = STREAM_ON;        /* FIXME: Start video capture here? */
1209
1210                 em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
1211
1212                 return 0;
1213         }
1214         case VIDIOC_STREAMOFF:
1215         {
1216                 int *type = arg;
1217                 int ret;
1218
1219                 if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1220                         || dev->io != IO_MMAP)
1221                         return -EINVAL;
1222
1223                 if (dev->stream == STREAM_ON) {
1224                         em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
1225                         if ((ret = em28xx_stream_interrupt(dev)))
1226                                 return ret;
1227                 }
1228                 em28xx_empty_framequeues(dev);
1229
1230                 return 0;
1231         }
1232         default:
1233                 return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
1234                                                   driver_ioctl);
1235         }
1236         return 0;
1237 }
1238
1239 /*
1240  * em28xx_v4l2_do_ioctl()
1241  * This function is _not_ called directly, but from
1242  * em28xx_v4l2_ioctl. Userspace
1243  * copying is done already, arg is a kernel pointer.
1244  */
1245 static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
1246                                  unsigned int cmd, void *arg)
1247 {
1248         struct em28xx *dev = filp->private_data;
1249
1250         if (!dev)
1251                 return -ENODEV;
1252
1253         if (video_debug > 1)
1254                 v4l_print_ioctl(dev->name,cmd);
1255
1256         switch (cmd) {
1257
1258                 /* --- capabilities ------------------------------------------ */
1259         case VIDIOC_QUERYCAP:
1260                 {
1261                 struct v4l2_capability *cap = arg;
1262
1263                 memset(cap, 0, sizeof(*cap));
1264                 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1265                 strlcpy(cap->card, em28xx_boards[dev->model].name,
1266                         sizeof(cap->card));
1267                 strlcpy(cap->bus_info, dev->udev->dev.bus_id,
1268                         sizeof(cap->bus_info));
1269                 cap->version = EM28XX_VERSION_CODE;
1270                 cap->capabilities =
1271                                 V4L2_CAP_SLICED_VBI_CAPTURE |
1272                                 V4L2_CAP_VIDEO_CAPTURE |
1273                                 V4L2_CAP_AUDIO |
1274                                 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1275                 if (dev->has_tuner)
1276                         cap->capabilities |= V4L2_CAP_TUNER;
1277                 return 0;
1278         }
1279         /* --- capture ioctls ---------------------------------------- */
1280         case VIDIOC_ENUM_FMT:
1281         {
1282                 struct v4l2_fmtdesc *fmtd = arg;
1283
1284                 if (fmtd->index != 0)
1285                         return -EINVAL;
1286                 memset(fmtd, 0, sizeof(*fmtd));
1287                 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1288                 strcpy(fmtd->description, "Packed YUY2");
1289                 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1290                 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1291                 return 0;
1292         }
1293         case VIDIOC_G_FMT:
1294                 return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
1295
1296         case VIDIOC_TRY_FMT:
1297         case VIDIOC_S_FMT:
1298                 return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
1299
1300         case VIDIOC_REQBUFS:
1301         {
1302                 struct v4l2_requestbuffers *rb = arg;
1303                 u32 i;
1304                 int ret;
1305
1306                 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1307                         rb->memory != V4L2_MEMORY_MMAP)
1308                         return -EINVAL;
1309
1310                 if (dev->io == IO_READ) {
1311                         em28xx_videodbg ("method is set to read;"
1312                                 " close and open the device again to"
1313                                 " choose the mmap I/O method\n");
1314                         return -EINVAL;
1315                 }
1316
1317                 for (i = 0; i < dev->num_frames; i++)
1318                         if (dev->frame[i].vma_use_count) {
1319                                 em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
1320                                 return -EINVAL;
1321                         }
1322
1323                 if (dev->stream == STREAM_ON) {
1324                         em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1325                         if ((ret = em28xx_stream_interrupt(dev)))
1326                                 return ret;
1327                 }
1328
1329                 em28xx_empty_framequeues(dev);
1330
1331                 em28xx_release_buffers(dev);
1332                 if (rb->count)
1333                         rb->count =
1334                                 em28xx_request_buffers(dev, rb->count);
1335
1336                 dev->frame_current = NULL;
1337
1338                 em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
1339                                                 rb->count);
1340                 dev->io = rb->count ? IO_MMAP : IO_NONE;
1341                 return 0;
1342         }
1343         case VIDIOC_QUERYBUF:
1344         {
1345                 struct v4l2_buffer *b = arg;
1346
1347                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1348                         b->index >= dev->num_frames || dev->io != IO_MMAP)
1349                         return -EINVAL;
1350
1351                 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1352
1353                 if (dev->frame[b->index].vma_use_count) {
1354                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1355                 }
1356                 if (dev->frame[b->index].state == F_DONE)
1357                         b->flags |= V4L2_BUF_FLAG_DONE;
1358                 else if (dev->frame[b->index].state != F_UNUSED)
1359                         b->flags |= V4L2_BUF_FLAG_QUEUED;
1360                 return 0;
1361         }
1362         case VIDIOC_QBUF:
1363         {
1364                 struct v4l2_buffer *b = arg;
1365                 unsigned long lock_flags;
1366
1367                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1368                         b->index >= dev->num_frames || dev->io != IO_MMAP) {
1369                         return -EINVAL;
1370                 }
1371
1372                 if (dev->frame[b->index].state != F_UNUSED) {
1373                         return -EAGAIN;
1374                 }
1375                 dev->frame[b->index].state = F_QUEUED;
1376
1377                 /* add frame to fifo */
1378                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1379                 list_add_tail(&dev->frame[b->index].frame,
1380                                 &dev->inqueue);
1381                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1382
1383                 return 0;
1384         }
1385         case VIDIOC_DQBUF:
1386         {
1387                 struct v4l2_buffer *b = arg;
1388                 struct em28xx_frame_t *f;
1389                 unsigned long lock_flags;
1390                 int ret = 0;
1391
1392                 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
1393                         || dev->io != IO_MMAP)
1394                         return -EINVAL;
1395
1396                 if (list_empty(&dev->outqueue)) {
1397                         if (dev->stream == STREAM_OFF)
1398                                 return -EINVAL;
1399                         if (filp->f_flags & O_NONBLOCK)
1400                                 return -EAGAIN;
1401                         ret = wait_event_interruptible
1402                                 (dev->wait_frame,
1403                                 (!list_empty(&dev->outqueue)) ||
1404                                 (dev->state & DEV_DISCONNECTED));
1405                         if (ret)
1406                                 return ret;
1407                         if (dev->state & DEV_DISCONNECTED)
1408                                 return -ENODEV;
1409                 }
1410
1411                 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1412                 f = list_entry(dev->outqueue.next,
1413                                 struct em28xx_frame_t, frame);
1414                 list_del(dev->outqueue.next);
1415                 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1416
1417                 f->state = F_UNUSED;
1418                 memcpy(b, &f->buf, sizeof(*b));
1419
1420                 if (f->vma_use_count)
1421                         b->flags |= V4L2_BUF_FLAG_MAPPED;
1422
1423                 return 0;
1424         }
1425         default:
1426                 return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
1427                                        em28xx_video_do_ioctl);
1428         }
1429         return 0;
1430 }
1431
1432 /*
1433  * em28xx_v4l2_ioctl()
1434  * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
1435  */
1436 static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
1437                              unsigned int cmd, unsigned long arg)
1438 {
1439         int ret = 0;
1440         struct em28xx *dev = filp->private_data;
1441
1442         if (mutex_lock_interruptible(&dev->fileop_lock))
1443                 return -ERESTARTSYS;
1444
1445         if (dev->state & DEV_DISCONNECTED) {
1446                 em28xx_errdev("v4l2 ioctl: device not present\n");
1447                 mutex_unlock(&dev->fileop_lock);
1448                 return -ENODEV;
1449         }
1450
1451         if (dev->state & DEV_MISCONFIGURED) {
1452                 em28xx_errdev
1453                     ("v4l2 ioctl: device is misconfigured; close and open it again\n");
1454                 mutex_unlock(&dev->fileop_lock);
1455                 return -EIO;
1456         }
1457
1458         ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
1459
1460         mutex_unlock(&dev->fileop_lock);
1461
1462         return ret;
1463 }
1464
1465 static const struct file_operations em28xx_v4l_fops = {
1466         .owner = THIS_MODULE,
1467         .open = em28xx_v4l2_open,
1468         .release = em28xx_v4l2_close,
1469         .ioctl = em28xx_v4l2_ioctl,
1470         .read = em28xx_v4l2_read,
1471         .poll = em28xx_v4l2_poll,
1472         .mmap = em28xx_v4l2_mmap,
1473         .llseek = no_llseek,
1474         .compat_ioctl   = v4l_compat_ioctl32,
1475
1476 };
1477
1478 /******************************** usb interface *****************************************/
1479
1480 /*
1481  * em28xx_init_dev()
1482  * allocates and inits the device structs, registers i2c bus and v4l device
1483  */
1484 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1485                            int minor)
1486 {
1487         struct em28xx *dev = *devhandle;
1488         int retval = -ENOMEM;
1489         int errCode, i;
1490         unsigned int maxh, maxw;
1491
1492         dev->udev = udev;
1493         mutex_init(&dev->lock);
1494         init_waitqueue_head(&dev->open);
1495
1496         dev->em28xx_write_regs = em28xx_write_regs;
1497         dev->em28xx_read_reg = em28xx_read_reg;
1498         dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1499         dev->em28xx_write_regs_req = em28xx_write_regs_req;
1500         dev->em28xx_read_reg_req = em28xx_read_reg_req;
1501
1502         /* setup video picture settings for saa7113h */
1503         memset(&dev->vpic, 0, sizeof(dev->vpic));
1504         dev->vpic.colour = 128 << 8;
1505         dev->vpic.hue = 128 << 8;
1506         dev->vpic.brightness = 128 << 8;
1507         dev->vpic.contrast = 192 << 8;
1508         dev->vpic.whiteness = 128 << 8; /* This one isn't used */
1509         dev->vpic.depth = 16;
1510         dev->vpic.palette = VIDEO_PALETTE_YUV422;
1511
1512         em28xx_pre_card_setup(dev);
1513
1514         errCode = em28xx_config(dev);
1515         if (errCode) {
1516                 em28xx_errdev("error configuring device\n");
1517                 em28xx_devused &= ~(1<<dev->devno);
1518                 kfree(dev);
1519                 return -ENOMEM;
1520         }
1521
1522         mutex_lock(&dev->lock);
1523
1524         /* register i2c bus */
1525         em28xx_i2c_register(dev);
1526
1527         /* Do board specific init and eeprom reading */
1528         em28xx_card_setup(dev);
1529
1530         /* configure the device */
1531         em28xx_config_i2c(dev);
1532
1533         mutex_unlock(&dev->lock);
1534
1535         for (i = 0; i < TVNORMS; i++)
1536                 if (em28xx_boards[dev->model].norm == tvnorms[i].mode)
1537                         break;
1538         if (i == TVNORMS)
1539                 i = 0;
1540
1541         dev->tvnorm = &tvnorms[i];      /* set default norm */
1542
1543         em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
1544
1545         maxw = norm_maxw(dev);
1546         maxh = norm_maxh(dev);
1547
1548         /* set default image size */
1549         dev->width = maxw;
1550         dev->height = maxh;
1551         dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1552         dev->field_size = dev->width * dev->height;
1553         dev->frame_size =
1554             dev->interlaced ? dev->field_size << 1 : dev->field_size;
1555         dev->bytesperline = dev->width * 2;
1556         dev->hscale = 0;
1557         dev->vscale = 0;
1558         dev->ctl_input = 2;
1559
1560         errCode = em28xx_config(dev);
1561
1562         /* allocate and fill v4l2 device struct */
1563         dev->vdev = video_device_alloc();
1564         if (NULL == dev->vdev) {
1565                 em28xx_errdev("cannot allocate video_device.\n");
1566                 em28xx_devused&=~(1<<dev->devno);
1567                 kfree(dev);
1568                 return -ENOMEM;
1569         }
1570
1571         dev->vbi_dev = video_device_alloc();
1572         if (NULL == dev->vbi_dev) {
1573                 em28xx_errdev("cannot allocate video_device.\n");
1574                 kfree(dev->vdev);
1575                 em28xx_devused&=~(1<<dev->devno);
1576                 kfree(dev);
1577                 return -ENOMEM;
1578         }
1579
1580         /* Fills VBI device info */
1581         dev->vbi_dev->type = VFL_TYPE_VBI;
1582         dev->vbi_dev->fops = &em28xx_v4l_fops;
1583         dev->vbi_dev->minor = -1;
1584         dev->vbi_dev->dev = &dev->udev->dev;
1585         dev->vbi_dev->release = video_device_release;
1586         snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1587                                                          "em28xx",dev->devno,"vbi");
1588
1589         /* Fills CAPTURE device info */
1590         dev->vdev->type = VID_TYPE_CAPTURE;
1591         if (dev->has_tuner)
1592                 dev->vdev->type |= VID_TYPE_TUNER;
1593         dev->vdev->fops = &em28xx_v4l_fops;
1594         dev->vdev->minor = -1;
1595         dev->vdev->dev = &dev->udev->dev;
1596         dev->vdev->release = video_device_release;
1597         snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
1598                                                          "em28xx",dev->devno,"video");
1599
1600         list_add_tail(&dev->devlist,&em28xx_devlist);
1601
1602         /* register v4l2 device */
1603         mutex_lock(&dev->lock);
1604         if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1605                                          video_nr[dev->devno]))) {
1606                 em28xx_errdev("unable to register video device (error=%i).\n",
1607                               retval);
1608                 mutex_unlock(&dev->lock);
1609                 list_del(&dev->devlist);
1610                 video_device_release(dev->vdev);
1611                 em28xx_devused&=~(1<<dev->devno);
1612                 kfree(dev);
1613                 return -ENODEV;
1614         }
1615
1616         if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1617                                         vbi_nr[dev->devno]) < 0) {
1618                 printk("unable to register vbi device\n");
1619                 mutex_unlock(&dev->lock);
1620                 list_del(&dev->devlist);
1621                 video_device_release(dev->vbi_dev);
1622                 video_device_release(dev->vdev);
1623                 em28xx_devused&=~(1<<dev->devno);
1624                 kfree(dev);
1625                 return -ENODEV;
1626         } else {
1627                 printk("registered VBI\n");
1628         }
1629
1630         if (dev->has_msp34xx) {
1631                 /* Send a reset to other chips via gpio */
1632                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
1633                 msleep(3);
1634                 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
1635                 msleep(3);
1636
1637         }
1638         video_mux(dev, 0);
1639
1640         mutex_unlock(&dev->lock);
1641
1642         em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1643                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1644                                 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1645
1646         return 0;
1647 }
1648
1649 /*
1650  * em28xx_usb_probe()
1651  * checks for supported devices
1652  */
1653 static int em28xx_usb_probe(struct usb_interface *interface,
1654                             const struct usb_device_id *id)
1655 {
1656         const struct usb_endpoint_descriptor *endpoint;
1657         struct usb_device *udev;
1658         struct usb_interface *uif;
1659         struct em28xx *dev = NULL;
1660         int retval = -ENODEV;
1661         int i, nr, ifnum;
1662
1663         udev = usb_get_dev(interface_to_usbdev(interface));
1664         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
1665
1666         /* Check to see next free device and mark as used */
1667         nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
1668         em28xx_devused|=1<<nr;
1669
1670         /* Don't register audio interfaces */
1671         if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
1672                 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
1673                                 udev->descriptor.idVendor,udev->descriptor.idProduct,
1674                                 ifnum,
1675                                 interface->altsetting[0].desc.bInterfaceClass);
1676
1677                 em28xx_devused&=~(1<<nr);
1678                 return -ENODEV;
1679         }
1680
1681         em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
1682                         udev->descriptor.idVendor,udev->descriptor.idProduct,
1683                         ifnum,
1684                         interface->altsetting[0].desc.bInterfaceClass);
1685
1686         endpoint = &interface->cur_altsetting->endpoint[1].desc;
1687
1688         /* check if the device has the iso in endpoint at the correct place */
1689         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1690             USB_ENDPOINT_XFER_ISOC) {
1691                 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
1692                 em28xx_devused&=~(1<<nr);
1693                 return -ENODEV;
1694         }
1695         if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
1696                 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
1697                 em28xx_devused&=~(1<<nr);
1698                 return -ENODEV;
1699         }
1700
1701         if (nr >= EM28XX_MAXBOARDS) {
1702                 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
1703                 em28xx_devused&=~(1<<nr);
1704                 return -ENOMEM;
1705         }
1706
1707         /* allocate memory for our device state and initialize it */
1708         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1709         if (dev == NULL) {
1710                 em28xx_err(DRIVER_NAME ": out of memory!\n");
1711                 em28xx_devused&=~(1<<nr);
1712                 return -ENOMEM;
1713         }
1714
1715         snprintf(dev->name, 29, "em28xx #%d", nr);
1716         dev->devno = nr;
1717         dev->model = id->driver_info;
1718
1719         /* compute alternate max packet sizes */
1720         uif = udev->actconfig->interface[0];
1721
1722         dev->num_alt=uif->num_altsetting;
1723         em28xx_info("Alternate settings: %i\n",dev->num_alt);
1724 //      dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1725         dev->alt_max_pkt_size = kmalloc(32*
1726                                                 dev->num_alt,GFP_KERNEL);
1727         if (dev->alt_max_pkt_size == NULL) {
1728                 em28xx_errdev("out of memory!\n");
1729                 em28xx_devused&=~(1<<nr);
1730                 kfree(dev);
1731                 return -ENOMEM;
1732         }
1733
1734         for (i = 0; i < dev->num_alt ; i++) {
1735                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
1736                                                         wMaxPacketSize);
1737                 dev->alt_max_pkt_size[i] =
1738                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
1739                 em28xx_info("Alternate setting %i, max size= %i\n",i,
1740                                                         dev->alt_max_pkt_size[i]);
1741         }
1742
1743         if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
1744                 dev->model = card[nr];
1745
1746         /* allocate device struct */
1747         retval = em28xx_init_dev(&dev, udev, nr);
1748         if (retval)
1749                 return retval;
1750
1751         em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
1752
1753         /* save our data pointer in this interface device */
1754         usb_set_intfdata(interface, dev);
1755         return 0;
1756 }
1757
1758 /*
1759  * em28xx_usb_disconnect()
1760  * called when the device gets diconencted
1761  * video device will be unregistered on v4l2_close in case it is still open
1762  */
1763 static void em28xx_usb_disconnect(struct usb_interface *interface)
1764 {
1765         struct em28xx *dev = usb_get_intfdata(interface);
1766         usb_set_intfdata(interface, NULL);
1767
1768         if (!dev)
1769                 return;
1770
1771         down_write(&em28xx_disconnect);
1772
1773         mutex_lock(&dev->lock);
1774
1775         em28xx_info("disconnecting %s\n", dev->vdev->name);
1776
1777         wake_up_interruptible_all(&dev->open);
1778
1779         if (dev->users) {
1780                 em28xx_warn
1781                     ("device /dev/video%d is open! Deregistration and memory "
1782                      "deallocation are deferred on close.\n",
1783                                 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
1784
1785                 dev->state |= DEV_MISCONFIGURED;
1786                 em28xx_uninit_isoc(dev);
1787                 dev->state |= DEV_DISCONNECTED;
1788                 wake_up_interruptible(&dev->wait_frame);
1789                 wake_up_interruptible(&dev->wait_stream);
1790         } else {
1791                 dev->state |= DEV_DISCONNECTED;
1792                 em28xx_release_resources(dev);
1793         }
1794
1795         mutex_unlock(&dev->lock);
1796
1797         if (!dev->users) {
1798                 kfree(dev->alt_max_pkt_size);
1799                 kfree(dev);
1800         }
1801
1802         up_write(&em28xx_disconnect);
1803 }
1804
1805 static struct usb_driver em28xx_usb_driver = {
1806         .name = "em28xx",
1807         .probe = em28xx_usb_probe,
1808         .disconnect = em28xx_usb_disconnect,
1809         .id_table = em28xx_id_table,
1810 };
1811
1812 static int __init em28xx_module_init(void)
1813 {
1814         int result;
1815
1816         printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
1817                (EM28XX_VERSION_CODE >> 16) & 0xff,
1818                (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
1819 #ifdef SNAPSHOT
1820         printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
1821                SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
1822 #endif
1823
1824         /* register this driver with the USB subsystem */
1825         result = usb_register(&em28xx_usb_driver);
1826         if (result)
1827                 em28xx_err(DRIVER_NAME
1828                            " usb_register failed. Error number %d.\n", result);
1829
1830         return result;
1831 }
1832
1833 static void __exit em28xx_module_exit(void)
1834 {
1835         /* deregister this driver with the USB subsystem */
1836         usb_deregister(&em28xx_usb_driver);
1837 }
1838
1839 module_init(em28xx_module_init);
1840 module_exit(em28xx_module_exit);