drivers/media/video/videodev.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  *      A generic video device interface for the LINUX operating system
   5  *      using a set of device structures/vectors for low level operations.
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  *
  12  * Authors:     Alan Cox, <alan@redhat.com> (version 1)
  13  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  14  *
  15  * Fixes:       20000516  Claudio Matsuoka <claudio@conectiva.com>
  16  *              - Added procfs support
  17  */
  18
  19 #define dbgarg(cmd, fmt, arg...) \
  20                 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {                \
  21                         printk (KERN_DEBUG "%s: ",  vfd->name);         \
  22                         v4l_printk_ioctl(cmd);                          \
  23                         printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg); \
  24                 }
  25
  26 #define dbgarg2(fmt, arg...) \
  27                 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)                  \
  28                         printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg);
  29
  30 #include <linux/module.h>
  31 #include <linux/types.h>
  32 #include <linux/kernel.h>
  33 #include <linux/mm.h>
  34 #include <linux/string.h>
  35 #include <linux/errno.h>
  36 #include <linux/init.h>
  37 #include <linux/kmod.h>
  38 #include <linux/slab.h>
  39 #include <asm/uaccess.h>
  40 #include <asm/system.h>
  41
  42 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
  43 #include <linux/videodev2.h>
  44
  45 #ifdef CONFIG_VIDEO_V4L1
  46 #include <linux/videodev.h>
  47 #endif
  48 #include <media/v4l2-common.h>
  49
  50 #define VIDEO_NUM_DEVICES       256
  51 #define VIDEO_NAME              "video4linux"
  52
  53 /*
  54  *      sysfs stuff
  55  */
  56
  57 static ssize_t show_name(struct device *cd,
  58                          struct device_attribute *attr, char *buf)
  59 {
  60         struct video_device *vfd = container_of(cd, struct video_device,
  61                                                 class_dev);
  62         return sprintf(buf, "%.*s\n", (int)sizeof(vfd->name), vfd->name);
  63 }
  64
  65 struct video_device *video_device_alloc(void)
  66 {
  67         struct video_device *vfd;
  68
  69         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
  70         return vfd;
  71 }
  72
  73 void video_device_release(struct video_device *vfd)
  74 {
  75         kfree(vfd);
  76 }
  77
  78 static void video_release(struct device *cd)
  79 {
  80         struct video_device *vfd = container_of(cd, struct video_device,
  81                                                                 class_dev);
  82
  83 #if 1
  84         /* needed until all drivers are fixed */
  85         if (!vfd->release)
  86                 return;
  87 #endif
  88         vfd->release(vfd);
  89 }
  90
  91 static struct device_attribute video_device_attrs[] = {
  92         __ATTR(name, S_IRUGO, show_name, NULL),
  93         __ATTR_NULL
  94 };
  95
  96 static struct class video_class = {
  97         .name    = VIDEO_NAME,
  98         .dev_attrs = video_device_attrs,
  99         .dev_release = video_release,
 100 };
 101
 102 /*
 103  *      Active devices
 104  */
 105
 106 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 107 static DEFINE_MUTEX(videodev_lock);
 108
 109 struct video_device* video_devdata(struct file *file)
 110 {
 111         return video_device[iminor(file->f_path.dentry->d_inode)];
 112 }
 113
 114 /*
 115  *      Open a video device - FIXME: Obsoleted
 116  */
 117 static int video_open(struct inode *inode, struct file *file)
 118 {
 119         unsigned int minor = iminor(inode);
 120         int err = 0;
 121         struct video_device *vfl;
 122         const struct file_operations *old_fops;
 123
 124         if(minor>=VIDEO_NUM_DEVICES)
 125                 return -ENODEV;
 126         mutex_lock(&videodev_lock);
 127         vfl=video_device[minor];
 128         if(vfl==NULL) {
 129                 mutex_unlock(&videodev_lock);
 130                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 131                 mutex_lock(&videodev_lock);
 132                 vfl=video_device[minor];
 133                 if (vfl==NULL) {
 134                         mutex_unlock(&videodev_lock);
 135                         return -ENODEV;
 136                 }
 137         }
 138         old_fops = file->f_op;
 139         file->f_op = fops_get(vfl->fops);
 140         if(file->f_op->open)
 141                 err = file->f_op->open(inode,file);
 142         if (err) {
 143                 fops_put(file->f_op);
 144                 file->f_op = fops_get(old_fops);
 145         }
 146         fops_put(old_fops);
 147         mutex_unlock(&videodev_lock);
 148         return err;
 149 }
 150
 151 /*
 152  * helper function -- handles userspace copying for ioctl arguments
 153  */
 154
 155 #ifdef __OLD_VIDIOC_
 156 static unsigned int
 157 video_fix_command(unsigned int cmd)
 158 {
 159         switch (cmd) {
 160         case VIDIOC_OVERLAY_OLD:
 161                 cmd = VIDIOC_OVERLAY;
 162                 break;
 163         case VIDIOC_S_PARM_OLD:
 164                 cmd = VIDIOC_S_PARM;
 165                 break;
 166         case VIDIOC_S_CTRL_OLD:
 167                 cmd = VIDIOC_S_CTRL;
 168                 break;
 169         case VIDIOC_G_AUDIO_OLD:
 170                 cmd = VIDIOC_G_AUDIO;
 171                 break;
 172         case VIDIOC_G_AUDOUT_OLD:
 173                 cmd = VIDIOC_G_AUDOUT;
 174                 break;
 175         case VIDIOC_CROPCAP_OLD:
 176                 cmd = VIDIOC_CROPCAP;
 177                 break;
 178         }
 179         return cmd;
 180 }
 181 #endif
 182
 183 /*
 184  * Obsolete usercopy function - Should be removed soon
 185  */
 186 int
 187 video_usercopy(struct inode *inode, struct file *file,
 188                unsigned int cmd, unsigned long arg,
 189                int (*func)(struct inode *inode, struct file *file,
 190                            unsigned int cmd, void *arg))
 191 {
 192         char    sbuf[128];
 193         void    *mbuf = NULL;
 194         void    *parg = NULL;
 195         int     err  = -EINVAL;
 196         int     is_ext_ctrl;
 197         size_t  ctrls_size = 0;
 198         void __user *user_ptr = NULL;
 199
 200 #ifdef __OLD_VIDIOC_
 201         cmd = video_fix_command(cmd);
 202 #endif
 203         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 204                        cmd == VIDIOC_TRY_EXT_CTRLS);
 205
 206         /*  Copy arguments into temp kernel buffer  */
 207         switch (_IOC_DIR(cmd)) {
 208         case _IOC_NONE:
 209                 parg = NULL;
 210                 break;
 211         case _IOC_READ:
 212         case _IOC_WRITE:
 213         case (_IOC_WRITE | _IOC_READ):
 214                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 215                         parg = sbuf;
 216                 } else {
 217                         /* too big to allocate from stack */
 218                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 219                         if (NULL == mbuf)
 220                                 return -ENOMEM;
 221                         parg = mbuf;
 222                 }
 223
 224                 err = -EFAULT;
 225                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 226                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 227                                 goto out;
 228                 break;
 229         }
 230         if (is_ext_ctrl) {
 231                 struct v4l2_ext_controls *p = parg;
 232
 233                 /* In case of an error, tell the caller that it wasn't
 234                    a specific control that caused it. */
 235                 p->error_idx = p->count;
 236                 user_ptr = (void __user *)p->controls;
 237                 if (p->count) {
 238                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 239                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 240                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 241                         err = -ENOMEM;
 242                         if (NULL == mbuf)
 243                                 goto out_ext_ctrl;
 244                         err = -EFAULT;
 245                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 246                                 goto out_ext_ctrl;
 247                         p->controls = mbuf;
 248                 }
 249         }
 250
 251         /* call driver */
 252         err = func(inode, file, cmd, parg);
 253         if (err == -ENOIOCTLCMD)
 254                 err = -EINVAL;
 255         if (is_ext_ctrl) {
 256                 struct v4l2_ext_controls *p = parg;
 257
 258                 p->controls = (void *)user_ptr;
 259                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 260                         err = -EFAULT;
 261                 goto out_ext_ctrl;
 262         }
 263         if (err < 0)
 264                 goto out;
 265
 266 out_ext_ctrl:
 267         /*  Copy results into user buffer  */
 268         switch (_IOC_DIR(cmd))
 269         {
 270         case _IOC_READ:
 271         case (_IOC_WRITE | _IOC_READ):
 272                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 273                         err = -EFAULT;
 274                 break;
 275         }
 276
 277 out:
 278         kfree(mbuf);
 279         return err;
 280 }
 281
 282 /*
 283  * open/release helper functions -- handle exclusive opens
 284  * Should be removed soon
 285  */
 286 int video_exclusive_open(struct inode *inode, struct file *file)
 287 {
 288         struct  video_device *vfl = video_devdata(file);
 289         int retval = 0;
 290
 291         mutex_lock(&vfl->lock);
 292         if (vfl->users) {
 293                 retval = -EBUSY;
 294         } else {
 295                 vfl->users++;
 296         }
 297         mutex_unlock(&vfl->lock);
 298         return retval;
 299 }
 300
 301 int video_exclusive_release(struct inode *inode, struct file *file)
 302 {
 303         struct  video_device *vfl = video_devdata(file);
 304
 305         vfl->users--;
 306         return 0;
 307 }
 308
 309 static char *v4l2_memory_names[] = {
 310         [V4L2_MEMORY_MMAP]    = "mmap",
 311         [V4L2_MEMORY_USERPTR] = "userptr",
 312         [V4L2_MEMORY_OVERLAY] = "overlay",
 313 };
 314
 315
 316 /* FIXME: Those stuff are replicated also on v4l2-common.c */
 317 static char *v4l2_type_names_FIXME[] = {
 318         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
 319         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
 320         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
 321         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 322         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 323         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 324         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
 325         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
 326         [V4L2_BUF_TYPE_PRIVATE]            = "private",
 327 };
 328
 329 static char *v4l2_field_names_FIXME[] = {
 330         [V4L2_FIELD_ANY]        = "any",
 331         [V4L2_FIELD_NONE]       = "none",
 332         [V4L2_FIELD_TOP]        = "top",
 333         [V4L2_FIELD_BOTTOM]     = "bottom",
 334         [V4L2_FIELD_INTERLACED] = "interlaced",
 335         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 336         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 337         [V4L2_FIELD_ALTERNATE]  = "alternate",
 338         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 339         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 340 };
 341
 342 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
 343
 344 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 345                                         struct v4l2_buffer *p)
 346 {
 347         struct v4l2_timecode *tc=&p->timecode;
 348
 349         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 350                 "bytesused=%d, flags=0x%08d, "
 351                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 352                         (p->timestamp.tv_sec/3600),
 353                         (int)(p->timestamp.tv_sec/60)%60,
 354                         (int)(p->timestamp.tv_sec%60),
 355                         p->timestamp.tv_usec,
 356                         p->index,
 357                         prt_names(p->type,v4l2_type_names_FIXME),
 358                         p->bytesused,p->flags,
 359                         p->field,p->sequence,
 360                         prt_names(p->memory,v4l2_memory_names),
 361                         p->m.userptr, p->length);
 362         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
 363                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 364                         tc->hours,tc->minutes,tc->seconds,
 365                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 366 }
 367
 368 static inline void dbgrect(struct video_device *vfd, char *s,
 369                                                         struct v4l2_rect *r)
 370 {
 371         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
 372                                                 r->width, r->height);
 373 };
 374
 375 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 376                                                 struct v4l2_pix_format *fmt)
 377 {
 378         dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 379                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 380                 fmt->width,fmt->height,
 381                 (fmt->pixelformat & 0xff),
 382                 (fmt->pixelformat >>  8) & 0xff,
 383                 (fmt->pixelformat >> 16) & 0xff,
 384                 (fmt->pixelformat >> 24) & 0xff,
 385                 prt_names(fmt->field,v4l2_field_names_FIXME),
 386                 fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
 387 };
 388
 389
 390 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 391 {
 392         switch (type) {
 393         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 394                 if (vfd->vidioc_try_fmt_cap)
 395                         return (0);
 396                 break;
 397         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 398                 if (vfd->vidioc_try_fmt_overlay)
 399                         return (0);
 400                 break;
 401         case V4L2_BUF_TYPE_VBI_CAPTURE:
 402                 if (vfd->vidioc_try_fmt_vbi)
 403                         return (0);
 404                 break;
 405         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 406                 if (vfd->vidioc_try_fmt_vbi_output)
 407                         return (0);
 408                 break;
 409         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 410                 if (vfd->vidioc_try_fmt_vbi_capture)
 411                         return (0);
 412                 break;
 413         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 414                 if (vfd->vidioc_try_fmt_video_output)
 415                         return (0);
 416                 break;
 417         case V4L2_BUF_TYPE_VBI_OUTPUT:
 418                 if (vfd->vidioc_try_fmt_vbi_output)
 419                         return (0);
 420                 break;
 421         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 422                 if (vfd->vidioc_try_fmt_output_overlay)
 423                         return (0);
 424                 break;
 425         case V4L2_BUF_TYPE_PRIVATE:
 426                 if (vfd->vidioc_try_fmt_type_private)
 427                         return (0);
 428                 break;
 429         }
 430         return (-EINVAL);
 431 }
 432
 433 static int __video_do_ioctl(struct inode *inode, struct file *file,
 434                 unsigned int cmd, void *arg)
 435 {
 436         struct video_device *vfd = video_devdata(file);
 437         void                 *fh = file->private_data;
 438         int                  ret = -EINVAL;
 439
 440         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 441                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 442                 v4l_print_ioctl(vfd->name, cmd);
 443         }
 444
 445 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 446         /***********************************************************
 447          Handles calls to the obsoleted V4L1 API
 448          Due to the nature of VIDIOCGMBUF, each driver that supports
 449          V4L1 should implement its own handler for this ioctl.
 450          ***********************************************************/
 451
 452         /* --- streaming capture ------------------------------------- */
 453         if (cmd == VIDIOCGMBUF) {
 454                 struct video_mbuf *p=arg;
 455
 456                 memset(p, 0, sizeof(*p));
 457
 458                 if (!vfd->vidiocgmbuf)
 459                         return ret;
 460                 ret=vfd->vidiocgmbuf(file, fh, p);
 461                 if (!ret)
 462                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 463                                                 p->size, p->frames,
 464                                                 (unsigned long)p->offsets);
 465                 return ret;
 466         }
 467
 468         /********************************************************
 469          All other V4L1 calls are handled by v4l1_compat module.
 470          Those calls will be translated into V4L2 calls, and
 471          __video_do_ioctl will be called again, with one or more
 472          V4L2 ioctls.
 473          ********************************************************/
 474         if (_IOC_TYPE(cmd)=='v')
 475                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 476                                                 __video_do_ioctl);
 477 #endif
 478
 479         switch(cmd) {
 480         /* --- capabilities ------------------------------------------ */
 481         case VIDIOC_QUERYCAP:
 482         {
 483                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 484                 memset(cap, 0, sizeof(*cap));
 485
 486                 if (!vfd->vidioc_querycap)
 487                         break;
 488
 489                 ret=vfd->vidioc_querycap(file, fh, cap);
 490                 if (!ret)
 491                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 492                                         "version=0x%08x, "
 493                                         "capabilities=0x%08x\n",
 494                                         cap->driver,cap->card,cap->bus_info,
 495                                         cap->version,
 496                                         cap->capabilities);
 497                 break;
 498         }
 499
 500         /* --- priority ------------------------------------------ */
 501         case VIDIOC_G_PRIORITY:
 502         {
 503                 enum v4l2_priority *p=arg;
 504
 505                 if (!vfd->vidioc_g_priority)
 506                         break;
 507                 ret=vfd->vidioc_g_priority(file, fh, p);
 508                 if (!ret)
 509                         dbgarg(cmd, "priority is %d\n", *p);
 510                 break;
 511         }
 512         case VIDIOC_S_PRIORITY:
 513         {
 514                 enum v4l2_priority *p=arg;
 515
 516                 if (!vfd->vidioc_s_priority)
 517                         break;
 518                 dbgarg(cmd, "setting priority to %d\n", *p);
 519                 ret=vfd->vidioc_s_priority(file, fh, *p);
 520                 break;
 521         }
 522
 523         /* --- capture ioctls ---------------------------------------- */
 524         case VIDIOC_ENUM_FMT:
 525         {
 526                 struct v4l2_fmtdesc *f = arg;
 527                 enum v4l2_buf_type type;
 528                 unsigned int index;
 529
 530                 index = f->index;
 531                 type  = f->type;
 532                 memset(f,0,sizeof(*f));
 533                 f->index = index;
 534                 f->type  = type;
 535
 536                 switch (type) {
 537                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 538                         if (vfd->vidioc_enum_fmt_cap)
 539                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 540                         break;
 541                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 542                         if (vfd->vidioc_enum_fmt_overlay)
 543                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 544                         break;
 545                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 546                         if (vfd->vidioc_enum_fmt_vbi)
 547                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 548                         break;
 549                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 550                         if (vfd->vidioc_enum_fmt_vbi_output)
 551                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 552                                                                 fh, f);
 553                         break;
 554                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 555                         if (vfd->vidioc_enum_fmt_vbi_capture)
 556                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 557                                                                 fh, f);
 558                         break;
 559                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 560                         if (vfd->vidioc_enum_fmt_video_output)
 561                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 562                                                                 fh, f);
 563                         break;
 564                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 565                         if (vfd->vidioc_enum_fmt_vbi_output)
 566                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 567                                                                 fh, f);
 568                         break;
 569                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 570                         if (vfd->vidioc_enum_fmt_output_overlay)
 571                                 ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
 572                         break;
 573                 case V4L2_BUF_TYPE_PRIVATE:
 574                         if (vfd->vidioc_enum_fmt_type_private)
 575                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 576                                                                 fh, f);
 577                         break;
 578                 }
 579                 if (!ret)
 580                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 581                                         "pixelformat=%c%c%c%c, description='%s'\n",
 582                                         f->index, f->type, f->flags,
 583                                         (f->pixelformat & 0xff),
 584                                         (f->pixelformat >>  8) & 0xff,
 585                                         (f->pixelformat >> 16) & 0xff,
 586                                         (f->pixelformat >> 24) & 0xff,
 587                                         f->description);
 588                 break;
 589         }
 590         case VIDIOC_G_FMT:
 591         {
 592                 struct v4l2_format *f = (struct v4l2_format *)arg;
 593                 enum v4l2_buf_type type=f->type;
 594
 595                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 596                 f->type=type;
 597
 598                 /* FIXME: Should be one dump per type */
 599                 dbgarg (cmd, "type=%s\n", prt_names(type,
 600                                         v4l2_type_names_FIXME));
 601
 602                 switch (type) {
 603                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 604                         if (vfd->vidioc_g_fmt_cap)
 605                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 606                         if (!ret)
 607                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 608                         break;
 609                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 610                         if (vfd->vidioc_g_fmt_overlay)
 611                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 612                         break;
 613                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 614                         if (vfd->vidioc_g_fmt_vbi)
 615                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 616                         break;
 617                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 618                         if (vfd->vidioc_g_fmt_vbi_output)
 619                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 620                         break;
 621                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 622                         if (vfd->vidioc_g_fmt_vbi_capture)
 623                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 624                         break;
 625                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 626                         if (vfd->vidioc_g_fmt_video_output)
 627                                 ret=vfd->vidioc_g_fmt_video_output(file,
 628                                                                 fh, f);
 629                         break;
 630                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 631                         if (vfd->vidioc_g_fmt_output_overlay)
 632                                 ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
 633                         break;
 634                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 635                         if (vfd->vidioc_g_fmt_vbi_output)
 636                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 637                         break;
 638                 case V4L2_BUF_TYPE_PRIVATE:
 639                         if (vfd->vidioc_g_fmt_type_private)
 640                                 ret=vfd->vidioc_g_fmt_type_private(file,
 641                                                                 fh, f);
 642                         break;
 643                 }
 644
 645                 break;
 646         }
 647         case VIDIOC_S_FMT:
 648         {
 649                 struct v4l2_format *f = (struct v4l2_format *)arg;
 650
 651                 /* FIXME: Should be one dump per type */
 652                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 653                                         v4l2_type_names_FIXME));
 654
 655                 switch (f->type) {
 656                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 657                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 658                         if (vfd->vidioc_s_fmt_cap)
 659                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 660                         break;
 661                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 662                         if (vfd->vidioc_s_fmt_overlay)
 663                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 664                         break;
 665                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 666                         if (vfd->vidioc_s_fmt_vbi)
 667                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 668                         break;
 669                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 670                         if (vfd->vidioc_s_fmt_vbi_output)
 671                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 672                         break;
 673                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 674                         if (vfd->vidioc_s_fmt_vbi_capture)
 675                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 676                         break;
 677                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 678                         if (vfd->vidioc_s_fmt_video_output)
 679                                 ret=vfd->vidioc_s_fmt_video_output(file,
 680                                                                 fh, f);
 681                         break;
 682                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 683                         if (vfd->vidioc_s_fmt_output_overlay)
 684                                 ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
 685                         break;
 686                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 687                         if (vfd->vidioc_s_fmt_vbi_output)
 688                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 689                                                                 fh, f);
 690                         break;
 691                 case V4L2_BUF_TYPE_PRIVATE:
 692                         if (vfd->vidioc_s_fmt_type_private)
 693                                 ret=vfd->vidioc_s_fmt_type_private(file,
 694                                                                 fh, f);
 695                         break;
 696                 }
 697                 break;
 698         }
 699         case VIDIOC_TRY_FMT:
 700         {
 701                 struct v4l2_format *f = (struct v4l2_format *)arg;
 702
 703                 /* FIXME: Should be one dump per type */
 704                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 705                                                 v4l2_type_names_FIXME));
 706                 switch (f->type) {
 707                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 708                         if (vfd->vidioc_try_fmt_cap)
 709                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 710                         if (!ret)
 711                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 712                         break;
 713                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 714                         if (vfd->vidioc_try_fmt_overlay)
 715                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 716                         break;
 717                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 718                         if (vfd->vidioc_try_fmt_vbi)
 719                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 720                         break;
 721                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 722                         if (vfd->vidioc_try_fmt_vbi_output)
 723                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 724                                                                 fh, f);
 725                         break;
 726                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 727                         if (vfd->vidioc_try_fmt_vbi_capture)
 728                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 729                                                                 fh, f);
 730                         break;
 731                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 732                         if (vfd->vidioc_try_fmt_video_output)
 733                                 ret=vfd->vidioc_try_fmt_video_output(file,
 734                                                                 fh, f);
 735                         break;
 736                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 737                         if (vfd->vidioc_try_fmt_output_overlay)
 738                                 ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
 739                         break;
 740                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 741                         if (vfd->vidioc_try_fmt_vbi_output)
 742                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 743                                                                 fh, f);
 744                         break;
 745                 case V4L2_BUF_TYPE_PRIVATE:
 746                         if (vfd->vidioc_try_fmt_type_private)
 747                                 ret=vfd->vidioc_try_fmt_type_private(file,
 748                                                                 fh, f);
 749                         break;
 750                 }
 751
 752                 break;
 753         }
 754         /* FIXME: Those buf reqs could be handled here,
 755            with some changes on videobuf to allow its header to be included at
 756            videodev2.h or being merged at videodev2.
 757          */
 758         case VIDIOC_REQBUFS:
 759         {
 760                 struct v4l2_requestbuffers *p=arg;
 761
 762                 if (!vfd->vidioc_reqbufs)
 763                         break;
 764                 ret = check_fmt (vfd, p->type);
 765                 if (ret)
 766                         break;
 767
 768                 ret=vfd->vidioc_reqbufs(file, fh, p);
 769                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 770                                 p->count,
 771                                 prt_names(p->type,v4l2_type_names_FIXME),
 772                                 prt_names(p->memory,v4l2_memory_names));
 773                 break;
 774         }
 775         case VIDIOC_QUERYBUF:
 776         {
 777                 struct v4l2_buffer *p=arg;
 778
 779                 if (!vfd->vidioc_querybuf)
 780                         break;
 781                 ret = check_fmt (vfd, p->type);
 782                 if (ret)
 783                         break;
 784
 785                 ret=vfd->vidioc_querybuf(file, fh, p);
 786                 if (!ret)
 787                         dbgbuf(cmd,vfd,p);
 788                 break;
 789         }
 790         case VIDIOC_QBUF:
 791         {
 792                 struct v4l2_buffer *p=arg;
 793
 794                 if (!vfd->vidioc_qbuf)
 795                         break;
 796                 ret = check_fmt (vfd, p->type);
 797                 if (ret)
 798                         break;
 799
 800                 ret=vfd->vidioc_qbuf(file, fh, p);
 801                 if (!ret)
 802                         dbgbuf(cmd,vfd,p);
 803                 break;
 804         }
 805         case VIDIOC_DQBUF:
 806         {
 807                 struct v4l2_buffer *p=arg;
 808                 if (!vfd->vidioc_dqbuf)
 809                         break;
 810                 ret = check_fmt (vfd, p->type);
 811                 if (ret)
 812                         break;
 813
 814                 ret=vfd->vidioc_dqbuf(file, fh, p);
 815                 if (!ret)
 816                         dbgbuf(cmd,vfd,p);
 817                 break;
 818         }
 819         case VIDIOC_OVERLAY:
 820         {
 821                 int *i = arg;
 822
 823                 if (!vfd->vidioc_overlay)
 824                         break;
 825                 dbgarg (cmd, "value=%d\n",*i);
 826                 ret=vfd->vidioc_overlay(file, fh, *i);
 827                 break;
 828         }
 829         case VIDIOC_G_FBUF:
 830         {
 831                 struct v4l2_framebuffer *p=arg;
 832                 if (!vfd->vidioc_g_fbuf)
 833                         break;
 834                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 835                 if (!ret) {
 836                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 837                                         p->capability,p->flags,
 838                                         (unsigned long)p->base);
 839                         v4l_print_pix_fmt (vfd, &p->fmt);
 840                 }
 841                 break;
 842         }
 843         case VIDIOC_S_FBUF:
 844         {
 845                 struct v4l2_framebuffer *p=arg;
 846                 if (!vfd->vidioc_s_fbuf)
 847                         break;
 848
 849                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 850                                 p->capability,p->flags,(unsigned long)p->base);
 851                 v4l_print_pix_fmt (vfd, &p->fmt);
 852                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 853
 854                 break;
 855         }
 856         case VIDIOC_STREAMON:
 857         {
 858                 enum v4l2_buf_type i = *(int *)arg;
 859                 if (!vfd->vidioc_streamon)
 860                         break;
 861                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 862                 ret=vfd->vidioc_streamon(file, fh,i);
 863                 break;
 864         }
 865         case VIDIOC_STREAMOFF:
 866         {
 867                 enum v4l2_buf_type i = *(int *)arg;
 868
 869                 if (!vfd->vidioc_streamoff)
 870                         break;
 871                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 872                 ret=vfd->vidioc_streamoff(file, fh, i);
 873                 break;
 874         }
 875         /* ---------- tv norms ---------- */
 876         case VIDIOC_ENUMSTD:
 877         {
 878                 struct v4l2_standard *p = arg;
 879                 v4l2_std_id id = vfd->tvnorms,curr_id=0;
 880                 unsigned int index = p->index,i;
 881
 882                 if (index<0) {
 883                         ret=-EINVAL;
 884                         break;
 885                 }
 886
 887                 /* Return norm array on a canonical way */
 888                 for (i=0;i<= index && id; i++) {
 889                         if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
 890                                 curr_id = V4L2_STD_PAL;
 891                         } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
 892                                 curr_id = V4L2_STD_PAL_BG;
 893                         } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
 894                                 curr_id = V4L2_STD_PAL_DK;
 895                         } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
 896                                 curr_id = V4L2_STD_PAL_B;
 897                         } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
 898                                 curr_id = V4L2_STD_PAL_B1;
 899                         } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
 900                                 curr_id = V4L2_STD_PAL_G;
 901                         } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
 902                                 curr_id = V4L2_STD_PAL_H;
 903                         } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
 904                                 curr_id = V4L2_STD_PAL_I;
 905                         } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
 906                                 curr_id = V4L2_STD_PAL_D;
 907                         } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
 908                                 curr_id = V4L2_STD_PAL_D1;
 909                         } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
 910                                 curr_id = V4L2_STD_PAL_K;
 911                         } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
 912                                 curr_id = V4L2_STD_PAL_M;
 913                         } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
 914                                 curr_id = V4L2_STD_PAL_N;
 915                         } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
 916                                 curr_id = V4L2_STD_PAL_Nc;
 917                         } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
 918                                 curr_id = V4L2_STD_PAL_60;
 919                         } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
 920                                 curr_id = V4L2_STD_NTSC;
 921                         } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
 922                                 curr_id = V4L2_STD_NTSC_M;
 923                         } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
 924                                 curr_id = V4L2_STD_NTSC_M_JP;
 925                         } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
 926                                 curr_id = V4L2_STD_NTSC_443;
 927                         } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
 928                                 curr_id = V4L2_STD_NTSC_M_KR;
 929                         } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 930                                 curr_id = V4L2_STD_SECAM;
 931                         } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
 932                                 curr_id = V4L2_STD_SECAM_DK;
 933                         } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
 934                                 curr_id = V4L2_STD_SECAM_B;
 935                         } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
 936                                 curr_id = V4L2_STD_SECAM_D;
 937                         } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
 938                                 curr_id = V4L2_STD_SECAM_G;
 939                         } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
 940                                 curr_id = V4L2_STD_SECAM_H;
 941                         } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
 942                                 curr_id = V4L2_STD_SECAM_K;
 943                         } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
 944                                 curr_id = V4L2_STD_SECAM_K1;
 945                         } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
 946                                 curr_id = V4L2_STD_SECAM_L;
 947                         } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
 948                                 curr_id = V4L2_STD_SECAM_LC;
 949                         } else {
 950                                 break;
 951                         }
 952                         id &= ~curr_id;
 953                 }
 954                 if (i<=index)
 955                         return -EINVAL;
 956
 957                 v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
 958                 p->index = index;
 959
 960                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 961                                 "framelines=%d\n", p->index,
 962                                 (unsigned long long)p->id, p->name,
 963                                 p->frameperiod.numerator,
 964                                 p->frameperiod.denominator,
 965                                 p->framelines);
 966
 967                 ret=0;
 968                 break;
 969         }
 970         case VIDIOC_G_STD:
 971         {
 972                 v4l2_std_id *id = arg;
 973
 974                 *id = vfd->current_norm;
 975
 976                 dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
 977
 978                 ret=0;
 979                 break;
 980         }
 981         case VIDIOC_S_STD:
 982         {
 983                 v4l2_std_id *id = arg,norm;
 984
 985                 dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
 986
 987                 norm = (*id) & vfd->tvnorms;
 988                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
 989                         break;
 990
 991                 /* Calls the specific handler */
 992                 if (vfd->vidioc_s_std)
 993                         ret=vfd->vidioc_s_std(file, fh, &norm);
 994                 else
 995                         ret=-EINVAL;
 996
 997                 /* Updates standard information */
 998                 if (ret>=0)
 999                         vfd->current_norm=norm;
1000
1001                 break;
1002         }
1003         case VIDIOC_QUERYSTD:
1004         {
1005                 v4l2_std_id *p=arg;
1006
1007                 if (!vfd->vidioc_querystd)
1008                         break;
1009                 ret=vfd->vidioc_querystd(file, fh, arg);
1010                 if (!ret)
1011                         dbgarg (cmd, "detected std=%08Lx\n",
1012                                                 (unsigned long long)*p);
1013                 break;
1014         }
1015         /* ------ input switching ---------- */
1016         /* FIXME: Inputs can be handled inside videodev2 */
1017         case VIDIOC_ENUMINPUT:
1018         {
1019                 struct v4l2_input *p=arg;
1020                 int i=p->index;
1021
1022                 if (!vfd->vidioc_enum_input)
1023                         break;
1024                 memset(p, 0, sizeof(*p));
1025                 p->index=i;
1026
1027                 ret=vfd->vidioc_enum_input(file, fh, p);
1028                 if (!ret)
1029                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1030                                         "audioset=%d, "
1031                                         "tuner=%d, std=%08Lx, status=%d\n",
1032                                         p->index,p->name,p->type,p->audioset,
1033                                         p->tuner,
1034                                         (unsigned long long)p->std,
1035                                         p->status);
1036                 break;
1037         }
1038         case VIDIOC_G_INPUT:
1039         {
1040                 unsigned int *i = arg;
1041
1042                 if (!vfd->vidioc_g_input)
1043                         break;
1044                 ret=vfd->vidioc_g_input(file, fh, i);
1045                 if (!ret)
1046                         dbgarg (cmd, "value=%d\n",*i);
1047                 break;
1048         }
1049         case VIDIOC_S_INPUT:
1050         {
1051                 unsigned int *i = arg;
1052
1053                 if (!vfd->vidioc_s_input)
1054                         break;
1055                 dbgarg (cmd, "value=%d\n",*i);
1056                 ret=vfd->vidioc_s_input(file, fh, *i);
1057                 break;
1058         }
1059
1060         /* ------ output switching ---------- */
1061         case VIDIOC_G_OUTPUT:
1062         {
1063                 unsigned int *i = arg;
1064
1065                 if (!vfd->vidioc_g_output)
1066                         break;
1067                 ret=vfd->vidioc_g_output(file, fh, i);
1068                 if (!ret)
1069                         dbgarg (cmd, "value=%d\n",*i);
1070                 break;
1071         }
1072         case VIDIOC_S_OUTPUT:
1073         {
1074                 unsigned int *i = arg;
1075
1076                 if (!vfd->vidioc_s_output)
1077                         break;
1078                 dbgarg (cmd, "value=%d\n",*i);
1079                 ret=vfd->vidioc_s_output(file, fh, *i);
1080                 break;
1081         }
1082
1083         /* --- controls ---------------------------------------------- */
1084         case VIDIOC_QUERYCTRL:
1085         {
1086                 struct v4l2_queryctrl *p=arg;
1087
1088                 if (!vfd->vidioc_queryctrl)
1089                         break;
1090                 ret=vfd->vidioc_queryctrl(file, fh, p);
1091
1092                 if (!ret)
1093                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1094                                         "min/max=%d/%d,"
1095                                         " step=%d, default=%d, flags=0x%08x\n",
1096                                         p->id,p->type,p->name,p->minimum,
1097                                         p->maximum,p->step,p->default_value,
1098                                         p->flags);
1099                 break;
1100         }
1101         case VIDIOC_G_CTRL:
1102         {
1103                 struct v4l2_control *p = arg;
1104
1105                 if (!vfd->vidioc_g_ctrl)
1106                         break;
1107                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1108
1109                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1110                 if (!ret)
1111                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1112                 break;
1113         }
1114         case VIDIOC_S_CTRL:
1115         {
1116                 struct v4l2_control *p = arg;
1117
1118                 if (!vfd->vidioc_s_ctrl)
1119                         break;
1120                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1121
1122                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1123                 break;
1124         }
1125         case VIDIOC_G_EXT_CTRLS:
1126         {
1127                 struct v4l2_ext_controls *p = arg;
1128
1129                 if (vfd->vidioc_g_ext_ctrls) {
1130                         dbgarg(cmd, "count=%d\n", p->count);
1131
1132                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1133                 }
1134                 break;
1135         }
1136         case VIDIOC_S_EXT_CTRLS:
1137         {
1138                 struct v4l2_ext_controls *p = arg;
1139
1140                 if (vfd->vidioc_s_ext_ctrls) {
1141                         dbgarg(cmd, "count=%d\n", p->count);
1142
1143                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1144                 }
1145                 break;
1146         }
1147         case VIDIOC_TRY_EXT_CTRLS:
1148         {
1149                 struct v4l2_ext_controls *p = arg;
1150
1151                 if (vfd->vidioc_try_ext_ctrls) {
1152                         dbgarg(cmd, "count=%d\n", p->count);
1153
1154                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1155                 }
1156                 break;
1157         }
1158         case VIDIOC_QUERYMENU:
1159         {
1160                 struct v4l2_querymenu *p=arg;
1161                 if (!vfd->vidioc_querymenu)
1162                         break;
1163                 ret=vfd->vidioc_querymenu(file, fh, p);
1164                 if (!ret)
1165                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1166                                                 p->id,p->index,p->name);
1167                 break;
1168         }
1169         /* --- audio ---------------------------------------------- */
1170         case VIDIOC_ENUMAUDIO:
1171         {
1172                 struct v4l2_audio *p=arg;
1173
1174                 if (!vfd->vidioc_enumaudio)
1175                         break;
1176                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1177                 ret=vfd->vidioc_enumaudio(file, fh, p);
1178                 if (!ret)
1179                         dbgarg2("index=%d, name=%s, capability=%d, "
1180                                         "mode=%d\n",p->index,p->name,
1181                                         p->capability, p->mode);
1182                 break;
1183         }
1184         case VIDIOC_G_AUDIO:
1185         {
1186                 struct v4l2_audio *p=arg;
1187                 __u32 index=p->index;
1188
1189                 if (!vfd->vidioc_g_audio)
1190                         break;
1191
1192                 memset(p,0,sizeof(*p));
1193                 p->index=index;
1194                 dbgarg(cmd, "Get for index=%d\n", p->index);
1195                 ret=vfd->vidioc_g_audio(file, fh, p);
1196                 if (!ret)
1197                         dbgarg2("index=%d, name=%s, capability=%d, "
1198                                         "mode=%d\n",p->index,
1199                                         p->name,p->capability, p->mode);
1200                 break;
1201         }
1202         case VIDIOC_S_AUDIO:
1203         {
1204                 struct v4l2_audio *p=arg;
1205
1206                 if (!vfd->vidioc_s_audio)
1207                         break;
1208                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1209                                         "mode=%d\n", p->index, p->name,
1210                                         p->capability, p->mode);
1211                 ret=vfd->vidioc_s_audio(file, fh, p);
1212                 break;
1213         }
1214         case VIDIOC_ENUMAUDOUT:
1215         {
1216                 struct v4l2_audioout *p=arg;
1217
1218                 if (!vfd->vidioc_enumaudout)
1219                         break;
1220                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1221                 ret=vfd->vidioc_enumaudout(file, fh, p);
1222                 if (!ret)
1223                         dbgarg2("index=%d, name=%s, capability=%d, "
1224                                         "mode=%d\n", p->index, p->name,
1225                                         p->capability,p->mode);
1226                 break;
1227         }
1228         case VIDIOC_G_AUDOUT:
1229         {
1230                 struct v4l2_audioout *p=arg;
1231
1232                 if (!vfd->vidioc_g_audout)
1233                         break;
1234                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1235                 ret=vfd->vidioc_g_audout(file, fh, p);
1236                 if (!ret)
1237                         dbgarg2("index=%d, name=%s, capability=%d, "
1238                                         "mode=%d\n", p->index, p->name,
1239                                         p->capability,p->mode);
1240                 break;
1241         }
1242         case VIDIOC_S_AUDOUT:
1243         {
1244                 struct v4l2_audioout *p=arg;
1245
1246                 if (!vfd->vidioc_s_audout)
1247                         break;
1248                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1249                                         "mode=%d\n", p->index, p->name,
1250                                         p->capability,p->mode);
1251
1252                 ret=vfd->vidioc_s_audout(file, fh, p);
1253                 break;
1254         }
1255         case VIDIOC_G_MODULATOR:
1256         {
1257                 struct v4l2_modulator *p=arg;
1258                 if (!vfd->vidioc_g_modulator)
1259                         break;
1260                 ret=vfd->vidioc_g_modulator(file, fh, p);
1261                 if (!ret)
1262                         dbgarg(cmd, "index=%d, name=%s, "
1263                                         "capability=%d, rangelow=%d,"
1264                                         " rangehigh=%d, txsubchans=%d\n",
1265                                         p->index, p->name,p->capability,
1266                                         p->rangelow, p->rangehigh,
1267                                         p->txsubchans);
1268                 break;
1269         }
1270         case VIDIOC_S_MODULATOR:
1271         {
1272                 struct v4l2_modulator *p=arg;
1273                 if (!vfd->vidioc_s_modulator)
1274                         break;
1275                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1276                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1277                                 p->index, p->name,p->capability,p->rangelow,
1278                                 p->rangehigh,p->txsubchans);
1279                         ret=vfd->vidioc_s_modulator(file, fh, p);
1280                 break;
1281         }
1282         case VIDIOC_G_CROP:
1283         {
1284                 struct v4l2_crop *p=arg;
1285                 if (!vfd->vidioc_g_crop)
1286                         break;
1287                 ret=vfd->vidioc_g_crop(file, fh, p);
1288                 if (!ret) {
1289                         dbgarg(cmd, "type=%d\n", p->type);
1290                         dbgrect(vfd, "", &p->c);
1291                 }
1292                 break;
1293         }
1294         case VIDIOC_S_CROP:
1295         {
1296                 struct v4l2_crop *p=arg;
1297                 if (!vfd->vidioc_s_crop)
1298                         break;
1299                 dbgarg(cmd, "type=%d\n", p->type);
1300                 dbgrect(vfd, "", &p->c);
1301                 ret=vfd->vidioc_s_crop(file, fh, p);
1302                 break;
1303         }
1304         case VIDIOC_CROPCAP:
1305         {
1306                 struct v4l2_cropcap *p=arg;
1307                 /*FIXME: Should also show v4l2_fract pixelaspect */
1308                 if (!vfd->vidioc_cropcap)
1309                         break;
1310                 dbgarg(cmd, "type=%d\n", p->type);
1311                 dbgrect(vfd, "bounds ", &p->bounds);
1312                 dbgrect(vfd, "defrect ", &p->defrect);
1313                 ret=vfd->vidioc_cropcap(file, fh, p);
1314                 break;
1315         }
1316         case VIDIOC_G_JPEGCOMP:
1317         {
1318                 struct v4l2_jpegcompression *p=arg;
1319                 if (!vfd->vidioc_g_jpegcomp)
1320                         break;
1321                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1322                 if (!ret)
1323                         dbgarg (cmd, "quality=%d, APPn=%d, "
1324                                                 "APP_len=%d, COM_len=%d, "
1325                                                 "jpeg_markers=%d\n",
1326                                                 p->quality,p->APPn,p->APP_len,
1327                                                 p->COM_len,p->jpeg_markers);
1328                 break;
1329         }
1330         case VIDIOC_S_JPEGCOMP:
1331         {
1332                 struct v4l2_jpegcompression *p=arg;
1333                 if (!vfd->vidioc_g_jpegcomp)
1334                         break;
1335                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1336                                         "COM_len=%d, jpeg_markers=%d\n",
1337                                         p->quality,p->APPn,p->APP_len,
1338                                         p->COM_len,p->jpeg_markers);
1339                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1340                 break;
1341         }
1342         case VIDIOC_G_ENC_INDEX:
1343         {
1344                 struct v4l2_enc_idx *p=arg;
1345
1346                 if (!vfd->vidioc_g_enc_index)
1347                         break;
1348                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1349                 if (!ret)
1350                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1351                                         p->entries,p->entries_cap);
1352                 break;
1353         }
1354         case VIDIOC_ENCODER_CMD:
1355         {
1356                 struct v4l2_encoder_cmd *p=arg;
1357
1358                 if (!vfd->vidioc_encoder_cmd)
1359                         break;
1360                 ret=vfd->vidioc_encoder_cmd(file, fh, p);
1361                 if (!ret)
1362                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1363                                         p->cmd,p->flags);
1364                 break;
1365         }
1366         case VIDIOC_TRY_ENCODER_CMD:
1367         {
1368                 struct v4l2_encoder_cmd *p=arg;
1369
1370                 if (!vfd->vidioc_try_encoder_cmd)
1371                         break;
1372                 ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
1373                 if (!ret)
1374                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1375                                         p->cmd,p->flags);
1376                 break;
1377         }
1378         case VIDIOC_G_PARM:
1379         {
1380                 struct v4l2_streamparm *p=arg;
1381                 __u32 type=p->type;
1382
1383                 memset(p,0,sizeof(*p));
1384                 p->type=type;
1385
1386                 if (vfd->vidioc_g_parm) {
1387                         ret=vfd->vidioc_g_parm(file, fh, p);
1388                 } else {
1389                         struct v4l2_standard s;
1390
1391                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1392                                 return -EINVAL;
1393
1394                         v4l2_video_std_construct(&s, vfd->current_norm,
1395                                                  v4l2_norm_to_name(vfd->current_norm));
1396
1397                         p->parm.capture.timeperframe = s.frameperiod;
1398                         ret=0;
1399                 }
1400
1401                 dbgarg (cmd, "type=%d\n", p->type);
1402                 break;
1403         }
1404         case VIDIOC_S_PARM:
1405         {
1406                 struct v4l2_streamparm *p=arg;
1407                 if (!vfd->vidioc_s_parm)
1408                         break;
1409                 dbgarg (cmd, "type=%d\n", p->type);
1410                 ret=vfd->vidioc_s_parm(file, fh, p);
1411                 break;
1412         }
1413         case VIDIOC_G_TUNER:
1414         {
1415                 struct v4l2_tuner *p=arg;
1416                 __u32 index=p->index;
1417
1418                 if (!vfd->vidioc_g_tuner)
1419                         break;
1420
1421                 memset(p,0,sizeof(*p));
1422                 p->index=index;
1423
1424                 ret=vfd->vidioc_g_tuner(file, fh, p);
1425                 if (!ret)
1426                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1427                                         "capability=%d, rangelow=%d, "
1428                                         "rangehigh=%d, signal=%d, afc=%d, "
1429                                         "rxsubchans=%d, audmode=%d\n",
1430                                         p->index, p->name, p->type,
1431                                         p->capability, p->rangelow,
1432                                         p->rangehigh, p->rxsubchans,
1433                                         p->audmode, p->signal, p->afc);
1434                 break;
1435         }
1436         case VIDIOC_S_TUNER:
1437         {
1438                 struct v4l2_tuner *p=arg;
1439                 if (!vfd->vidioc_s_tuner)
1440                         break;
1441                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1442                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1443                                 "signal=%d, afc=%d, rxsubchans=%d, "
1444                                 "audmode=%d\n",p->index, p->name, p->type,
1445                                 p->capability, p->rangelow,p->rangehigh,
1446                                 p->rxsubchans, p->audmode, p->signal,
1447                                 p->afc);
1448                 ret=vfd->vidioc_s_tuner(file, fh, p);
1449                 break;
1450         }
1451         case VIDIOC_G_FREQUENCY:
1452         {
1453                 struct v4l2_frequency *p=arg;
1454                 if (!vfd->vidioc_g_frequency)
1455                         break;
1456
1457                 memset(p,0,sizeof(*p));
1458
1459                 ret=vfd->vidioc_g_frequency(file, fh, p);
1460                 if (!ret)
1461                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1462                                                 p->tuner,p->type,p->frequency);
1463                 break;
1464         }
1465         case VIDIOC_S_FREQUENCY:
1466         {
1467                 struct v4l2_frequency *p=arg;
1468                 if (!vfd->vidioc_s_frequency)
1469                         break;
1470                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1471                                 p->tuner,p->type,p->frequency);
1472                 ret=vfd->vidioc_s_frequency(file, fh, p);
1473                 break;
1474         }
1475         case VIDIOC_G_SLICED_VBI_CAP:
1476         {
1477                 struct v4l2_sliced_vbi_cap *p=arg;
1478                 if (!vfd->vidioc_g_sliced_vbi_cap)
1479                         break;
1480                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1481                 if (!ret)
1482                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1483                 break;
1484         }
1485         case VIDIOC_LOG_STATUS:
1486         {
1487                 if (!vfd->vidioc_log_status)
1488                         break;
1489                 ret=vfd->vidioc_log_status(file, fh);
1490                 break;
1491         }
1492 #ifdef CONFIG_VIDEO_ADV_DEBUG
1493         case VIDIOC_DBG_G_REGISTER:
1494         {
1495                 struct v4l2_register *p=arg;
1496                 if (!capable(CAP_SYS_ADMIN))
1497                         ret=-EPERM;
1498                 else if (vfd->vidioc_g_register)
1499                         ret=vfd->vidioc_g_register(file, fh, p);
1500                 break;
1501         }
1502         case VIDIOC_DBG_S_REGISTER:
1503         {
1504                 struct v4l2_register *p=arg;
1505                 if (!capable(CAP_SYS_ADMIN))
1506                         ret=-EPERM;
1507                 else if (vfd->vidioc_s_register)
1508                         ret=vfd->vidioc_s_register(file, fh, p);
1509                 break;
1510         }
1511 #endif
1512         case VIDIOC_G_CHIP_IDENT:
1513         {
1514                 struct v4l2_chip_ident *p=arg;
1515                 if (!vfd->vidioc_g_chip_ident)
1516                         break;
1517                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1518                 if (!ret)
1519                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1520                 break;
1521         }
1522         } /* switch */
1523
1524         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1525                 if (ret<0) {
1526                         printk ("%s: err:\n", vfd->name);
1527                         v4l_print_ioctl(vfd->name, cmd);
1528                 }
1529         }
1530
1531         return ret;
1532 }
1533
1534 int video_ioctl2 (struct inode *inode, struct file *file,
1535                unsigned int cmd, unsigned long arg)
1536 {
1537         char    sbuf[128];
1538         void    *mbuf = NULL;
1539         void    *parg = NULL;
1540         int     err  = -EINVAL;
1541         int     is_ext_ctrl;
1542         size_t  ctrls_size = 0;
1543         void __user *user_ptr = NULL;
1544
1545 #ifdef __OLD_VIDIOC_
1546         cmd = video_fix_command(cmd);
1547 #endif
1548         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1549                        cmd == VIDIOC_TRY_EXT_CTRLS);
1550
1551         /*  Copy arguments into temp kernel buffer  */
1552         switch (_IOC_DIR(cmd)) {
1553         case _IOC_NONE:
1554                 parg = NULL;
1555                 break;
1556         case _IOC_READ:
1557         case _IOC_WRITE:
1558         case (_IOC_WRITE | _IOC_READ):
1559                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1560                         parg = sbuf;
1561                 } else {
1562                         /* too big to allocate from stack */
1563                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1564                         if (NULL == mbuf)
1565                                 return -ENOMEM;
1566                         parg = mbuf;
1567                 }
1568
1569                 err = -EFAULT;
1570                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1571                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1572                                 goto out;
1573                 break;
1574         }
1575
1576         if (is_ext_ctrl) {
1577                 struct v4l2_ext_controls *p = parg;
1578
1579                 /* In case of an error, tell the caller that it wasn't
1580                    a specific control that caused it. */
1581                 p->error_idx = p->count;
1582                 user_ptr = (void __user *)p->controls;
1583                 if (p->count) {
1584                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1585                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1586                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1587                         err = -ENOMEM;
1588                         if (NULL == mbuf)
1589                                 goto out_ext_ctrl;
1590                         err = -EFAULT;
1591                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1592                                 goto out_ext_ctrl;
1593                         p->controls = mbuf;
1594                 }
1595         }
1596
1597         /* Handles IOCTL */
1598         err = __video_do_ioctl(inode, file, cmd, parg);
1599         if (err == -ENOIOCTLCMD)
1600                 err = -EINVAL;
1601         if (is_ext_ctrl) {
1602                 struct v4l2_ext_controls *p = parg;
1603
1604                 p->controls = (void *)user_ptr;
1605                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1606                         err = -EFAULT;
1607                 goto out_ext_ctrl;
1608         }
1609         if (err < 0)
1610                 goto out;
1611
1612 out_ext_ctrl:
1613         /*  Copy results into user buffer  */
1614         switch (_IOC_DIR(cmd))
1615         {
1616         case _IOC_READ:
1617         case (_IOC_WRITE | _IOC_READ):
1618                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1619                         err = -EFAULT;
1620                 break;
1621         }
1622
1623 out:
1624         kfree(mbuf);
1625         return err;
1626 }
1627
1628
1629 static const struct file_operations video_fops;
1630
1631 /**
1632  *      video_register_device - register video4linux devices
1633  *      @vfd:  video device structure we want to register
1634  *      @type: type of device to register
1635  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1636  *             -1 == first free)
1637  *
1638  *      The registration code assigns minor numbers based on the type
1639  *      requested. -ENFILE is returned in all the device slots for this
1640  *      category are full. If not then the minor field is set and the
1641  *      driver initialize function is called (if non %NULL).
1642  *
1643  *      Zero is returned on success.
1644  *
1645  *      Valid types are
1646  *
1647  *      %VFL_TYPE_GRABBER - A frame grabber
1648  *
1649  *      %VFL_TYPE_VTX - A teletext device
1650  *
1651  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1652  *
1653  *      %VFL_TYPE_RADIO - A radio card
1654  */
1655
1656 int video_register_device(struct video_device *vfd, int type, int nr)
1657 {
1658         int i=0;
1659         int base;
1660         int end;
1661         int ret;
1662         char *name_base;
1663
1664         switch(type)
1665         {
1666                 case VFL_TYPE_GRABBER:
1667                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1668                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1669                         name_base = "video";
1670                         break;
1671                 case VFL_TYPE_VTX:
1672                         base=MINOR_VFL_TYPE_VTX_MIN;
1673                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1674                         name_base = "vtx";
1675                         break;
1676                 case VFL_TYPE_VBI:
1677                         base=MINOR_VFL_TYPE_VBI_MIN;
1678                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1679                         name_base = "vbi";
1680                         break;
1681                 case VFL_TYPE_RADIO:
1682                         base=MINOR_VFL_TYPE_RADIO_MIN;
1683                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1684                         name_base = "radio";
1685                         break;
1686                 default:
1687                         printk(KERN_ERR "%s called with unknown type: %d\n",
1688                                __FUNCTION__, type);
1689                         return -1;
1690         }
1691
1692         /* pick a minor number */
1693         mutex_lock(&videodev_lock);
1694         if (nr >= 0  &&  nr < end-base) {
1695                 /* use the one the driver asked for */
1696                 i = base+nr;
1697                 if (NULL != video_device[i]) {
1698                         mutex_unlock(&videodev_lock);
1699                         return -ENFILE;
1700                 }
1701         } else {
1702                 /* use first free */
1703                 for(i=base;i<end;i++)
1704                         if (NULL == video_device[i])
1705                                 break;
1706                 if (i == end) {
1707                         mutex_unlock(&videodev_lock);
1708                         return -ENFILE;
1709                 }
1710         }
1711         video_device[i]=vfd;
1712         vfd->minor=i;
1713         mutex_unlock(&videodev_lock);
1714         mutex_init(&vfd->lock);
1715
1716         /* sysfs class */
1717         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1718         if (vfd->dev)
1719                 vfd->class_dev.parent = vfd->dev;
1720         vfd->class_dev.class       = &video_class;
1721         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1722         sprintf(vfd->class_dev.bus_id, "%s%d", name_base, i - base);
1723         ret = device_register(&vfd->class_dev);
1724         if (ret < 0) {
1725                 printk(KERN_ERR "%s: device_register failed\n",
1726                        __FUNCTION__);
1727                 goto fail_minor;
1728         }
1729
1730 #if 1
1731         /* needed until all drivers are fixed */
1732         if (!vfd->release)
1733                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1734                        "Please fix your driver for proper sysfs support, see "
1735                        "http://lwn.net/Articles/36850/\n", vfd->name);
1736 #endif
1737         return 0;
1738
1739 fail_minor:
1740         mutex_lock(&videodev_lock);
1741         video_device[vfd->minor] = NULL;
1742         vfd->minor = -1;
1743         mutex_unlock(&videodev_lock);
1744         return ret;
1745 }
1746
1747 /**
1748  *      video_unregister_device - unregister a video4linux device
1749  *      @vfd: the device to unregister
1750  *
1751  *      This unregisters the passed device and deassigns the minor
1752  *      number. Future open calls will be met with errors.
1753  */
1754
1755 void video_unregister_device(struct video_device *vfd)
1756 {
1757         mutex_lock(&videodev_lock);
1758         if(video_device[vfd->minor]!=vfd)
1759                 panic("videodev: bad unregister");
1760
1761         video_device[vfd->minor]=NULL;
1762         device_unregister(&vfd->class_dev);
1763         mutex_unlock(&videodev_lock);
1764 }
1765
1766 /*
1767  * Video fs operations
1768  */
1769 static const struct file_operations video_fops=
1770 {
1771         .owner          = THIS_MODULE,
1772         .llseek         = no_llseek,
1773         .open           = video_open,
1774 };
1775
1776 /*
1777  *      Initialise video for linux
1778  */
1779
1780 static int __init videodev_init(void)
1781 {
1782         int ret;
1783
1784         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1785         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1786                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1787                 return -EIO;
1788         }
1789
1790         ret = class_register(&video_class);
1791         if (ret < 0) {
1792                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1793                 printk(KERN_WARNING "video_dev: class_register failed\n");
1794                 return -EIO;
1795         }
1796
1797         return 0;
1798 }
1799
1800 static void __exit videodev_exit(void)
1801 {
1802         class_unregister(&video_class);
1803         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1804 }
1805
1806 module_init(videodev_init)
1807 module_exit(videodev_exit)
1808
1809 EXPORT_SYMBOL(video_register_device);
1810 EXPORT_SYMBOL(video_unregister_device);
1811 EXPORT_SYMBOL(video_devdata);
1812 EXPORT_SYMBOL(video_usercopy);
1813 EXPORT_SYMBOL(video_exclusive_open);
1814 EXPORT_SYMBOL(video_exclusive_release);
1815 EXPORT_SYMBOL(video_ioctl2);
1816 EXPORT_SYMBOL(video_device_alloc);
1817 EXPORT_SYMBOL(video_device_release);
1818
1819 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1820 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1821 MODULE_LICENSE("GPL");
1822
1823
1824 /*
1825  * Local variables:
1826  * c-basic-offset: 8
1827  * End:
1828  */