git.oblomov.eu Git - linux-2.6/blob - 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 class_device *cd, char *buf)
  58 {
  59         struct video_device *vfd = container_of(cd, struct video_device,
  60                                                                 class_dev);
  61         return sprintf(buf,"%.*s\n",(int)sizeof(vfd->name),vfd->name);
  62 }
  63
  64 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  65
  66 struct video_device *video_device_alloc(void)
  67 {
  68         struct video_device *vfd;
  69
  70         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
  71         return vfd;
  72 }
  73
  74 void video_device_release(struct video_device *vfd)
  75 {
  76         kfree(vfd);
  77 }
  78
  79 static void video_release(struct class_device *cd)
  80 {
  81         struct video_device *vfd = container_of(cd, struct video_device,
  82                                                                 class_dev);
  83
  84 #if 1
  85         /* needed until all drivers are fixed */
  86         if (!vfd->release)
  87                 return;
  88 #endif
  89         vfd->release(vfd);
  90 }
  91
  92 static struct class video_class = {
  93         .name    = VIDEO_NAME,
  94         .release = video_release,
  95 };
  96
  97 /*
  98  *      Active devices
  99  */
 100
 101 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 102 static DEFINE_MUTEX(videodev_lock);
 103
 104 struct video_device* video_devdata(struct file *file)
 105 {
 106         return video_device[iminor(file->f_path.dentry->d_inode)];
 107 }
 108
 109 /*
 110  *      Open a video device - FIXME: Obsoleted
 111  */
 112 static int video_open(struct inode *inode, struct file *file)
 113 {
 114         unsigned int minor = iminor(inode);
 115         int err = 0;
 116         struct video_device *vfl;
 117         const struct file_operations *old_fops;
 118
 119         if(minor>=VIDEO_NUM_DEVICES)
 120                 return -ENODEV;
 121         mutex_lock(&videodev_lock);
 122         vfl=video_device[minor];
 123         if(vfl==NULL) {
 124                 mutex_unlock(&videodev_lock);
 125                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 126                 mutex_lock(&videodev_lock);
 127                 vfl=video_device[minor];
 128                 if (vfl==NULL) {
 129                         mutex_unlock(&videodev_lock);
 130                         return -ENODEV;
 131                 }
 132         }
 133         old_fops = file->f_op;
 134         file->f_op = fops_get(vfl->fops);
 135         if(file->f_op->open)
 136                 err = file->f_op->open(inode,file);
 137         if (err) {
 138                 fops_put(file->f_op);
 139                 file->f_op = fops_get(old_fops);
 140         }
 141         fops_put(old_fops);
 142         mutex_unlock(&videodev_lock);
 143         return err;
 144 }
 145
 146 /*
 147  * helper function -- handles userspace copying for ioctl arguments
 148  */
 149
 150 #ifdef __OLD_VIDIOC_
 151 static unsigned int
 152 video_fix_command(unsigned int cmd)
 153 {
 154         switch (cmd) {
 155         case VIDIOC_OVERLAY_OLD:
 156                 cmd = VIDIOC_OVERLAY;
 157                 break;
 158         case VIDIOC_S_PARM_OLD:
 159                 cmd = VIDIOC_S_PARM;
 160                 break;
 161         case VIDIOC_S_CTRL_OLD:
 162                 cmd = VIDIOC_S_CTRL;
 163                 break;
 164         case VIDIOC_G_AUDIO_OLD:
 165                 cmd = VIDIOC_G_AUDIO;
 166                 break;
 167         case VIDIOC_G_AUDOUT_OLD:
 168                 cmd = VIDIOC_G_AUDOUT;
 169                 break;
 170         case VIDIOC_CROPCAP_OLD:
 171                 cmd = VIDIOC_CROPCAP;
 172                 break;
 173         }
 174         return cmd;
 175 }
 176 #endif
 177
 178 /*
 179  * Obsolete usercopy function - Should be removed soon
 180  */
 181 int
 182 video_usercopy(struct inode *inode, struct file *file,
 183                unsigned int cmd, unsigned long arg,
 184                int (*func)(struct inode *inode, struct file *file,
 185                            unsigned int cmd, void *arg))
 186 {
 187         char    sbuf[128];
 188         void    *mbuf = NULL;
 189         void    *parg = NULL;
 190         int     err  = -EINVAL;
 191         int     is_ext_ctrl;
 192         size_t  ctrls_size = 0;
 193         void __user *user_ptr = NULL;
 194
 195 #ifdef __OLD_VIDIOC_
 196         cmd = video_fix_command(cmd);
 197 #endif
 198         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 199                        cmd == VIDIOC_TRY_EXT_CTRLS);
 200
 201         /*  Copy arguments into temp kernel buffer  */
 202         switch (_IOC_DIR(cmd)) {
 203         case _IOC_NONE:
 204                 parg = NULL;
 205                 break;
 206         case _IOC_READ:
 207         case _IOC_WRITE:
 208         case (_IOC_WRITE | _IOC_READ):
 209                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 210                         parg = sbuf;
 211                 } else {
 212                         /* too big to allocate from stack */
 213                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 214                         if (NULL == mbuf)
 215                                 return -ENOMEM;
 216                         parg = mbuf;
 217                 }
 218
 219                 err = -EFAULT;
 220                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 221                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 222                                 goto out;
 223                 break;
 224         }
 225         if (is_ext_ctrl) {
 226                 struct v4l2_ext_controls *p = parg;
 227
 228                 /* In case of an error, tell the caller that it wasn't
 229                    a specific control that caused it. */
 230                 p->error_idx = p->count;
 231                 user_ptr = (void __user *)p->controls;
 232                 if (p->count) {
 233                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 234                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 235                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 236                         err = -ENOMEM;
 237                         if (NULL == mbuf)
 238                                 goto out_ext_ctrl;
 239                         err = -EFAULT;
 240                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 241                                 goto out_ext_ctrl;
 242                         p->controls = mbuf;
 243                 }
 244         }
 245
 246         /* call driver */
 247         err = func(inode, file, cmd, parg);
 248         if (err == -ENOIOCTLCMD)
 249                 err = -EINVAL;
 250         if (is_ext_ctrl) {
 251                 struct v4l2_ext_controls *p = parg;
 252
 253                 p->controls = (void *)user_ptr;
 254                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 255                         err = -EFAULT;
 256                 goto out_ext_ctrl;
 257         }
 258         if (err < 0)
 259                 goto out;
 260
 261 out_ext_ctrl:
 262         /*  Copy results into user buffer  */
 263         switch (_IOC_DIR(cmd))
 264         {
 265         case _IOC_READ:
 266         case (_IOC_WRITE | _IOC_READ):
 267                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 268                         err = -EFAULT;
 269                 break;
 270         }
 271
 272 out:
 273         kfree(mbuf);
 274         return err;
 275 }
 276
 277 /*
 278  * open/release helper functions -- handle exclusive opens
 279  * Should be removed soon
 280  */
 281 int video_exclusive_open(struct inode *inode, struct file *file)
 282 {
 283         struct  video_device *vfl = video_devdata(file);
 284         int retval = 0;
 285
 286         mutex_lock(&vfl->lock);
 287         if (vfl->users) {
 288                 retval = -EBUSY;
 289         } else {
 290                 vfl->users++;
 291         }
 292         mutex_unlock(&vfl->lock);
 293         return retval;
 294 }
 295
 296 int video_exclusive_release(struct inode *inode, struct file *file)
 297 {
 298         struct  video_device *vfl = video_devdata(file);
 299
 300         vfl->users--;
 301         return 0;
 302 }
 303
 304 static char *v4l2_memory_names[] = {
 305         [V4L2_MEMORY_MMAP]    = "mmap",
 306         [V4L2_MEMORY_USERPTR] = "userptr",
 307         [V4L2_MEMORY_OVERLAY] = "overlay",
 308 };
 309
 310
 311 /* FIXME: Those stuff are replicated also on v4l2-common.c */
 312 static char *v4l2_type_names_FIXME[] = {
 313         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
 314         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
 315         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
 316         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 317         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 318         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 319         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
 320         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
 321         [V4L2_BUF_TYPE_PRIVATE]            = "private",
 322 };
 323
 324 static char *v4l2_field_names_FIXME[] = {
 325         [V4L2_FIELD_ANY]        = "any",
 326         [V4L2_FIELD_NONE]       = "none",
 327         [V4L2_FIELD_TOP]        = "top",
 328         [V4L2_FIELD_BOTTOM]     = "bottom",
 329         [V4L2_FIELD_INTERLACED] = "interlaced",
 330         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 331         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 332         [V4L2_FIELD_ALTERNATE]  = "alternate",
 333         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 334         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 335 };
 336
 337 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
 338
 339 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 340                                         struct v4l2_buffer *p)
 341 {
 342         struct v4l2_timecode *tc=&p->timecode;
 343
 344         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 345                 "bytesused=%d, flags=0x%08d, "
 346                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 347                         (p->timestamp.tv_sec/3600),
 348                         (int)(p->timestamp.tv_sec/60)%60,
 349                         (int)(p->timestamp.tv_sec%60),
 350                         p->timestamp.tv_usec,
 351                         p->index,
 352                         prt_names(p->type,v4l2_type_names_FIXME),
 353                         p->bytesused,p->flags,
 354                         p->field,p->sequence,
 355                         prt_names(p->memory,v4l2_memory_names),
 356                         p->m.userptr, p->length);
 357         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
 358                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 359                         tc->hours,tc->minutes,tc->seconds,
 360                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 361 }
 362
 363 static inline void dbgrect(struct video_device *vfd, char *s,
 364                                                         struct v4l2_rect *r)
 365 {
 366         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
 367                                                 r->width, r->height);
 368 };
 369
 370 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 371                                                 struct v4l2_pix_format *fmt)
 372 {
 373         dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 374                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 375                 fmt->width,fmt->height,
 376                 (fmt->pixelformat & 0xff),
 377                 (fmt->pixelformat >>  8) & 0xff,
 378                 (fmt->pixelformat >> 16) & 0xff,
 379                 (fmt->pixelformat >> 24) & 0xff,
 380                 prt_names(fmt->field,v4l2_field_names_FIXME),
 381                 fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
 382 };
 383
 384
 385 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 386 {
 387         switch (type) {
 388         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 389                 if (vfd->vidioc_try_fmt_cap)
 390                         return (0);
 391                 break;
 392         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 393                 if (vfd->vidioc_try_fmt_overlay)
 394                         return (0);
 395                 break;
 396         case V4L2_BUF_TYPE_VBI_CAPTURE:
 397                 if (vfd->vidioc_try_fmt_vbi)
 398                         return (0);
 399                 break;
 400         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 401                 if (vfd->vidioc_try_fmt_vbi_output)
 402                         return (0);
 403                 break;
 404         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 405                 if (vfd->vidioc_try_fmt_vbi_capture)
 406                         return (0);
 407                 break;
 408         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 409                 if (vfd->vidioc_try_fmt_video_output)
 410                         return (0);
 411                 break;
 412         case V4L2_BUF_TYPE_VBI_OUTPUT:
 413                 if (vfd->vidioc_try_fmt_vbi_output)
 414                         return (0);
 415                 break;
 416         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 417                 if (vfd->vidioc_try_fmt_output_overlay)
 418                         return (0);
 419                 break;
 420         case V4L2_BUF_TYPE_PRIVATE:
 421                 if (vfd->vidioc_try_fmt_type_private)
 422                         return (0);
 423                 break;
 424         }
 425         return (-EINVAL);
 426 }
 427
 428 static int __video_do_ioctl(struct inode *inode, struct file *file,
 429                 unsigned int cmd, void *arg)
 430 {
 431         struct video_device *vfd = video_devdata(file);
 432         void                 *fh = file->private_data;
 433         int                  ret = -EINVAL;
 434
 435         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 436                                 !(vfd->debug | V4L2_DEBUG_IOCTL_ARG)) {
 437                 v4l_print_ioctl(vfd->name, cmd);
 438         }
 439
 440         if (_IOC_TYPE(cmd)=='v')
 441                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 442                                                 __video_do_ioctl);
 443
 444         switch(cmd) {
 445         /* --- capabilities ------------------------------------------ */
 446         case VIDIOC_QUERYCAP:
 447         {
 448                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 449                 memset(cap, 0, sizeof(*cap));
 450
 451                 if (!vfd->vidioc_querycap)
 452                         break;
 453
 454                 ret=vfd->vidioc_querycap(file, fh, cap);
 455                 if (!ret)
 456                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 457                                         "version=0x%08x, "
 458                                         "capabilities=0x%08x\n",
 459                                         cap->driver,cap->card,cap->bus_info,
 460                                         cap->version,
 461                                         cap->capabilities);
 462                 break;
 463         }
 464
 465         /* --- priority ------------------------------------------ */
 466         case VIDIOC_G_PRIORITY:
 467         {
 468                 enum v4l2_priority *p=arg;
 469
 470                 if (!vfd->vidioc_g_priority)
 471                         break;
 472                 ret=vfd->vidioc_g_priority(file, fh, p);
 473                 if (!ret)
 474                         dbgarg(cmd, "priority is %d\n", *p);
 475                 break;
 476         }
 477         case VIDIOC_S_PRIORITY:
 478         {
 479                 enum v4l2_priority *p=arg;
 480
 481                 if (!vfd->vidioc_s_priority)
 482                         break;
 483                 dbgarg(cmd, "setting priority to %d\n", *p);
 484                 ret=vfd->vidioc_s_priority(file, fh, *p);
 485                 break;
 486         }
 487
 488         /* --- capture ioctls ---------------------------------------- */
 489         case VIDIOC_ENUM_FMT:
 490         {
 491                 struct v4l2_fmtdesc *f = arg;
 492                 enum v4l2_buf_type type;
 493                 unsigned int index;
 494
 495                 index = f->index;
 496                 type  = f->type;
 497                 memset(f,0,sizeof(*f));
 498                 f->index = index;
 499                 f->type  = type;
 500
 501                 switch (type) {
 502                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 503                         if (vfd->vidioc_enum_fmt_cap)
 504                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 505                         break;
 506                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 507                         if (vfd->vidioc_enum_fmt_overlay)
 508                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 509                         break;
 510                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 511                         if (vfd->vidioc_enum_fmt_vbi)
 512                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 513                         break;
 514                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 515                         if (vfd->vidioc_enum_fmt_vbi_output)
 516                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 517                                                                 fh, f);
 518                         break;
 519                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 520                         if (vfd->vidioc_enum_fmt_vbi_capture)
 521                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 522                                                                 fh, f);
 523                         break;
 524                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 525                         if (vfd->vidioc_enum_fmt_video_output)
 526                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 527                                                                 fh, f);
 528                         break;
 529                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 530                         if (vfd->vidioc_enum_fmt_vbi_output)
 531                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 532                                                                 fh, f);
 533                         break;
 534                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 535                         if (vfd->vidioc_enum_fmt_output_overlay)
 536                                 ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
 537                         break;
 538                 case V4L2_BUF_TYPE_PRIVATE:
 539                         if (vfd->vidioc_enum_fmt_type_private)
 540                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 541                                                                 fh, f);
 542                         break;
 543                 }
 544                 if (!ret)
 545                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 546                                         "pixelformat=%c%c%c%c, description='%s'\n",
 547                                         f->index, f->type, f->flags,
 548                                         (f->pixelformat & 0xff),
 549                                         (f->pixelformat >>  8) & 0xff,
 550                                         (f->pixelformat >> 16) & 0xff,
 551                                         (f->pixelformat >> 24) & 0xff,
 552                                         f->description);
 553                 break;
 554         }
 555         case VIDIOC_G_FMT:
 556         {
 557                 struct v4l2_format *f = (struct v4l2_format *)arg;
 558                 enum v4l2_buf_type type=f->type;
 559
 560                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 561                 f->type=type;
 562
 563                 /* FIXME: Should be one dump per type */
 564                 dbgarg (cmd, "type=%s\n", prt_names(type,
 565                                         v4l2_type_names_FIXME));
 566
 567                 switch (type) {
 568                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 569                         if (vfd->vidioc_g_fmt_cap)
 570                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 571                         if (!ret)
 572                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 573                         break;
 574                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 575                         if (vfd->vidioc_g_fmt_overlay)
 576                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 577                         break;
 578                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 579                         if (vfd->vidioc_g_fmt_vbi)
 580                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 581                         break;
 582                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 583                         if (vfd->vidioc_g_fmt_vbi_output)
 584                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 585                         break;
 586                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 587                         if (vfd->vidioc_g_fmt_vbi_capture)
 588                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 589                         break;
 590                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 591                         if (vfd->vidioc_g_fmt_video_output)
 592                                 ret=vfd->vidioc_g_fmt_video_output(file,
 593                                                                 fh, f);
 594                         break;
 595                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 596                         if (vfd->vidioc_g_fmt_output_overlay)
 597                                 ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
 598                         break;
 599                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 600                         if (vfd->vidioc_g_fmt_vbi_output)
 601                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 602                         break;
 603                 case V4L2_BUF_TYPE_PRIVATE:
 604                         if (vfd->vidioc_g_fmt_type_private)
 605                                 ret=vfd->vidioc_g_fmt_type_private(file,
 606                                                                 fh, f);
 607                         break;
 608                 }
 609
 610                 break;
 611         }
 612         case VIDIOC_S_FMT:
 613         {
 614                 struct v4l2_format *f = (struct v4l2_format *)arg;
 615
 616                 /* FIXME: Should be one dump per type */
 617                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 618                                         v4l2_type_names_FIXME));
 619
 620                 switch (f->type) {
 621                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 622                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 623                         if (vfd->vidioc_s_fmt_cap)
 624                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 625                         break;
 626                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 627                         if (vfd->vidioc_s_fmt_overlay)
 628                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 629                         break;
 630                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 631                         if (vfd->vidioc_s_fmt_vbi)
 632                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 633                         break;
 634                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 635                         if (vfd->vidioc_s_fmt_vbi_output)
 636                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 637                         break;
 638                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 639                         if (vfd->vidioc_s_fmt_vbi_capture)
 640                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 641                         break;
 642                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 643                         if (vfd->vidioc_s_fmt_video_output)
 644                                 ret=vfd->vidioc_s_fmt_video_output(file,
 645                                                                 fh, f);
 646                         break;
 647                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 648                         if (vfd->vidioc_s_fmt_output_overlay)
 649                                 ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
 650                         break;
 651                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 652                         if (vfd->vidioc_s_fmt_vbi_output)
 653                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 654                                                                 fh, f);
 655                         break;
 656                 case V4L2_BUF_TYPE_PRIVATE:
 657                         if (vfd->vidioc_s_fmt_type_private)
 658                                 ret=vfd->vidioc_s_fmt_type_private(file,
 659                                                                 fh, f);
 660                         break;
 661                 }
 662                 break;
 663         }
 664         case VIDIOC_TRY_FMT:
 665         {
 666                 struct v4l2_format *f = (struct v4l2_format *)arg;
 667
 668                 /* FIXME: Should be one dump per type */
 669                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 670                                                 v4l2_type_names_FIXME));
 671                 switch (f->type) {
 672                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 673                         if (vfd->vidioc_try_fmt_cap)
 674                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 675                         if (!ret)
 676                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 677                         break;
 678                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 679                         if (vfd->vidioc_try_fmt_overlay)
 680                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 681                         break;
 682                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 683                         if (vfd->vidioc_try_fmt_vbi)
 684                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 685                         break;
 686                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 687                         if (vfd->vidioc_try_fmt_vbi_output)
 688                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 689                                                                 fh, f);
 690                         break;
 691                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 692                         if (vfd->vidioc_try_fmt_vbi_capture)
 693                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 694                                                                 fh, f);
 695                         break;
 696                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 697                         if (vfd->vidioc_try_fmt_video_output)
 698                                 ret=vfd->vidioc_try_fmt_video_output(file,
 699                                                                 fh, f);
 700                         break;
 701                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 702                         if (vfd->vidioc_try_fmt_output_overlay)
 703                                 ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
 704                         break;
 705                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 706                         if (vfd->vidioc_try_fmt_vbi_output)
 707                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 708                                                                 fh, f);
 709                         break;
 710                 case V4L2_BUF_TYPE_PRIVATE:
 711                         if (vfd->vidioc_try_fmt_type_private)
 712                                 ret=vfd->vidioc_try_fmt_type_private(file,
 713                                                                 fh, f);
 714                         break;
 715                 }
 716
 717                 break;
 718         }
 719         /* FIXME: Those buf reqs could be handled here,
 720            with some changes on videobuf to allow its header to be included at
 721            videodev2.h or being merged at videodev2.
 722          */
 723         case VIDIOC_REQBUFS:
 724         {
 725                 struct v4l2_requestbuffers *p=arg;
 726
 727                 if (!vfd->vidioc_reqbufs)
 728                         break;
 729                 ret = check_fmt (vfd, p->type);
 730                 if (ret)
 731                         break;
 732
 733                 ret=vfd->vidioc_reqbufs(file, fh, p);
 734                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 735                                 p->count,
 736                                 prt_names(p->type,v4l2_type_names_FIXME),
 737                                 prt_names(p->memory,v4l2_memory_names));
 738                 break;
 739         }
 740         case VIDIOC_QUERYBUF:
 741         {
 742                 struct v4l2_buffer *p=arg;
 743
 744                 if (!vfd->vidioc_querybuf)
 745                         break;
 746                 ret = check_fmt (vfd, p->type);
 747                 if (ret)
 748                         break;
 749
 750                 ret=vfd->vidioc_querybuf(file, fh, p);
 751                 if (!ret)
 752                         dbgbuf(cmd,vfd,p);
 753                 break;
 754         }
 755         case VIDIOC_QBUF:
 756         {
 757                 struct v4l2_buffer *p=arg;
 758
 759                 if (!vfd->vidioc_qbuf)
 760                         break;
 761                 ret = check_fmt (vfd, p->type);
 762                 if (ret)
 763                         break;
 764
 765                 ret=vfd->vidioc_qbuf(file, fh, p);
 766                 if (!ret)
 767                         dbgbuf(cmd,vfd,p);
 768                 break;
 769         }
 770         case VIDIOC_DQBUF:
 771         {
 772                 struct v4l2_buffer *p=arg;
 773                 if (!vfd->vidioc_dqbuf)
 774                         break;
 775                 ret = check_fmt (vfd, p->type);
 776                 if (ret)
 777                         break;
 778
 779                 ret=vfd->vidioc_dqbuf(file, fh, p);
 780                 if (!ret)
 781                         dbgbuf(cmd,vfd,p);
 782                 break;
 783         }
 784         case VIDIOC_OVERLAY:
 785         {
 786                 int *i = arg;
 787
 788                 if (!vfd->vidioc_overlay)
 789                         break;
 790                 dbgarg (cmd, "value=%d\n",*i);
 791                 ret=vfd->vidioc_overlay(file, fh, *i);
 792                 break;
 793         }
 794 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 795         /* --- streaming capture ------------------------------------- */
 796         case VIDIOCGMBUF:
 797         {
 798                 struct video_mbuf *p=arg;
 799
 800                 memset(p,0,sizeof(p));
 801
 802                 if (!vfd->vidiocgmbuf)
 803                         break;
 804                 ret=vfd->vidiocgmbuf(file, fh, p);
 805                 if (!ret)
 806                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 807                                                 p->size, p->frames,
 808                                                 (unsigned long)p->offsets);
 809                 break;
 810         }
 811 #endif
 812         case VIDIOC_G_FBUF:
 813         {
 814                 struct v4l2_framebuffer *p=arg;
 815                 if (!vfd->vidioc_g_fbuf)
 816                         break;
 817                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 818                 if (!ret) {
 819                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 820                                         p->capability,p->flags,
 821                                         (unsigned long)p->base);
 822                         v4l_print_pix_fmt (vfd, &p->fmt);
 823                 }
 824                 break;
 825         }
 826         case VIDIOC_S_FBUF:
 827         {
 828                 struct v4l2_framebuffer *p=arg;
 829                 if (!vfd->vidioc_s_fbuf)
 830                         break;
 831
 832                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 833                                 p->capability,p->flags,(unsigned long)p->base);
 834                 v4l_print_pix_fmt (vfd, &p->fmt);
 835                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 836
 837                 break;
 838         }
 839         case VIDIOC_STREAMON:
 840         {
 841                 enum v4l2_buf_type i = *(int *)arg;
 842                 if (!vfd->vidioc_streamon)
 843                         break;
 844                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 845                 ret=vfd->vidioc_streamon(file, fh,i);
 846                 break;
 847         }
 848         case VIDIOC_STREAMOFF:
 849         {
 850                 enum v4l2_buf_type i = *(int *)arg;
 851
 852                 if (!vfd->vidioc_streamoff)
 853                         break;
 854                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 855                 ret=vfd->vidioc_streamoff(file, fh, i);
 856                 break;
 857         }
 858         /* ---------- tv norms ---------- */
 859         case VIDIOC_ENUMSTD:
 860         {
 861                 struct v4l2_standard *p = arg;
 862                 v4l2_std_id id = vfd->tvnorms,curr_id=0;
 863                 unsigned int index = p->index,i;
 864
 865                 if (index<0) {
 866                         ret=-EINVAL;
 867                         break;
 868                 }
 869
 870                 /* Return norm array on a canonical way */
 871                 for (i=0;i<= index && id; i++) {
 872                         if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
 873                                 curr_id = V4L2_STD_PAL;
 874                         } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
 875                                 curr_id = V4L2_STD_PAL_BG;
 876                         } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
 877                                 curr_id = V4L2_STD_PAL_DK;
 878                         } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
 879                                 curr_id = V4L2_STD_PAL_B;
 880                         } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
 881                                 curr_id = V4L2_STD_PAL_B1;
 882                         } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
 883                                 curr_id = V4L2_STD_PAL_G;
 884                         } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
 885                                 curr_id = V4L2_STD_PAL_H;
 886                         } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
 887                                 curr_id = V4L2_STD_PAL_I;
 888                         } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
 889                                 curr_id = V4L2_STD_PAL_D;
 890                         } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
 891                                 curr_id = V4L2_STD_PAL_D1;
 892                         } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
 893                                 curr_id = V4L2_STD_PAL_K;
 894                         } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
 895                                 curr_id = V4L2_STD_PAL_M;
 896                         } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
 897                                 curr_id = V4L2_STD_PAL_N;
 898                         } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
 899                                 curr_id = V4L2_STD_PAL_Nc;
 900                         } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
 901                                 curr_id = V4L2_STD_PAL_60;
 902                         } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
 903                                 curr_id = V4L2_STD_NTSC;
 904                         } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
 905                                 curr_id = V4L2_STD_NTSC_M;
 906                         } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
 907                                 curr_id = V4L2_STD_NTSC_M_JP;
 908                         } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
 909                                 curr_id = V4L2_STD_NTSC_443;
 910                         } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
 911                                 curr_id = V4L2_STD_NTSC_M_KR;
 912                         } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 913                                 curr_id = V4L2_STD_SECAM;
 914                         } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
 915                                 curr_id = V4L2_STD_SECAM_DK;
 916                         } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
 917                                 curr_id = V4L2_STD_SECAM_B;
 918                         } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
 919                                 curr_id = V4L2_STD_SECAM_D;
 920                         } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
 921                                 curr_id = V4L2_STD_SECAM_G;
 922                         } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
 923                                 curr_id = V4L2_STD_SECAM_H;
 924                         } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
 925                                 curr_id = V4L2_STD_SECAM_K;
 926                         } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
 927                                 curr_id = V4L2_STD_SECAM_K1;
 928                         } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
 929                                 curr_id = V4L2_STD_SECAM_L;
 930                         } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
 931                                 curr_id = V4L2_STD_SECAM_LC;
 932                         } else {
 933                                 break;
 934                         }
 935                         id &= ~curr_id;
 936                 }
 937                 if (i<=index)
 938                         return -EINVAL;
 939
 940                 v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
 941                 p->index = index;
 942
 943                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 944                                 "framelines=%d\n", p->index,
 945                                 (unsigned long long)p->id, p->name,
 946                                 p->frameperiod.numerator,
 947                                 p->frameperiod.denominator,
 948                                 p->framelines);
 949
 950                 ret=0;
 951                 break;
 952         }
 953         case VIDIOC_G_STD:
 954         {
 955                 v4l2_std_id *id = arg;
 956
 957                 *id = vfd->current_norm;
 958
 959                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 960
 961                 ret=0;
 962                 break;
 963         }
 964         case VIDIOC_S_STD:
 965         {
 966                 v4l2_std_id *id = arg,norm;
 967
 968                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 969
 970                 norm = (*id) & vfd->tvnorms;
 971                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
 972                         break;
 973
 974                 /* Calls the specific handler */
 975                 if (vfd->vidioc_s_std)
 976                         ret=vfd->vidioc_s_std(file, fh, &norm);
 977                 else
 978                         ret=-EINVAL;
 979
 980                 /* Updates standard information */
 981                 if (ret>=0)
 982                         vfd->current_norm=norm;
 983
 984                 break;
 985         }
 986         case VIDIOC_QUERYSTD:
 987         {
 988                 v4l2_std_id *p=arg;
 989
 990                 if (!vfd->vidioc_querystd)
 991                         break;
 992                 ret=vfd->vidioc_querystd(file, fh, arg);
 993                 if (!ret)
 994                         dbgarg (cmd, "detected std=%Lu\n",
 995                                                 (unsigned long long)*p);
 996                 break;
 997         }
 998         /* ------ input switching ---------- */
 999         /* FIXME: Inputs can be handled inside videodev2 */
1000         case VIDIOC_ENUMINPUT:
1001         {
1002                 struct v4l2_input *p=arg;
1003                 int i=p->index;
1004
1005                 if (!vfd->vidioc_enum_input)
1006                         break;
1007                 memset(p, 0, sizeof(*p));
1008                 p->index=i;
1009
1010                 ret=vfd->vidioc_enum_input(file, fh, p);
1011                 if (!ret)
1012                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1013                                         "audioset=%d, "
1014                                         "tuner=%d, std=%Ld, status=%d\n",
1015                                         p->index,p->name,p->type,p->audioset,
1016                                         p->tuner,
1017                                         (unsigned long long)p->std,
1018                                         p->status);
1019                 break;
1020         }
1021         case VIDIOC_G_INPUT:
1022         {
1023                 unsigned int *i = arg;
1024
1025                 if (!vfd->vidioc_g_input)
1026                         break;
1027                 ret=vfd->vidioc_g_input(file, fh, i);
1028                 if (!ret)
1029                         dbgarg (cmd, "value=%d\n",*i);
1030                 break;
1031         }
1032         case VIDIOC_S_INPUT:
1033         {
1034                 unsigned int *i = arg;
1035
1036                 if (!vfd->vidioc_s_input)
1037                         break;
1038                 dbgarg (cmd, "value=%d\n",*i);
1039                 ret=vfd->vidioc_s_input(file, fh, *i);
1040                 break;
1041         }
1042
1043         /* ------ output switching ---------- */
1044         case VIDIOC_G_OUTPUT:
1045         {
1046                 unsigned int *i = arg;
1047
1048                 if (!vfd->vidioc_g_output)
1049                         break;
1050                 ret=vfd->vidioc_g_output(file, fh, i);
1051                 if (!ret)
1052                         dbgarg (cmd, "value=%d\n",*i);
1053                 break;
1054         }
1055         case VIDIOC_S_OUTPUT:
1056         {
1057                 unsigned int *i = arg;
1058
1059                 if (!vfd->vidioc_s_output)
1060                         break;
1061                 dbgarg (cmd, "value=%d\n",*i);
1062                 ret=vfd->vidioc_s_output(file, fh, *i);
1063                 break;
1064         }
1065
1066         /* --- controls ---------------------------------------------- */
1067         case VIDIOC_QUERYCTRL:
1068         {
1069                 struct v4l2_queryctrl *p=arg;
1070
1071                 if (!vfd->vidioc_queryctrl)
1072                         break;
1073                 ret=vfd->vidioc_queryctrl(file, fh, p);
1074
1075                 if (!ret)
1076                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1077                                         "min/max=%d/%d,"
1078                                         " step=%d, default=%d, flags=0x%08x\n",
1079                                         p->id,p->type,p->name,p->minimum,
1080                                         p->maximum,p->step,p->default_value,
1081                                         p->flags);
1082                 break;
1083         }
1084         case VIDIOC_G_CTRL:
1085         {
1086                 struct v4l2_control *p = arg;
1087
1088                 if (!vfd->vidioc_g_ctrl)
1089                         break;
1090                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1091
1092                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1093                 if (!ret)
1094                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1095                 break;
1096         }
1097         case VIDIOC_S_CTRL:
1098         {
1099                 struct v4l2_control *p = arg;
1100
1101                 if (!vfd->vidioc_s_ctrl)
1102                         break;
1103                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1104
1105                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1106                 break;
1107         }
1108         case VIDIOC_G_EXT_CTRLS:
1109         {
1110                 struct v4l2_ext_controls *p = arg;
1111
1112                 if (vfd->vidioc_g_ext_ctrls) {
1113                         dbgarg(cmd, "count=%d\n", p->count);
1114
1115                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1116                 }
1117                 break;
1118         }
1119         case VIDIOC_S_EXT_CTRLS:
1120         {
1121                 struct v4l2_ext_controls *p = arg;
1122
1123                 if (vfd->vidioc_s_ext_ctrls) {
1124                         dbgarg(cmd, "count=%d\n", p->count);
1125
1126                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1127                 }
1128                 break;
1129         }
1130         case VIDIOC_TRY_EXT_CTRLS:
1131         {
1132                 struct v4l2_ext_controls *p = arg;
1133
1134                 if (vfd->vidioc_try_ext_ctrls) {
1135                         dbgarg(cmd, "count=%d\n", p->count);
1136
1137                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1138                 }
1139                 break;
1140         }
1141         case VIDIOC_QUERYMENU:
1142         {
1143                 struct v4l2_querymenu *p=arg;
1144                 if (!vfd->vidioc_querymenu)
1145                         break;
1146                 ret=vfd->vidioc_querymenu(file, fh, p);
1147                 if (!ret)
1148                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1149                                                 p->id,p->index,p->name);
1150                 break;
1151         }
1152         /* --- audio ---------------------------------------------- */
1153         case VIDIOC_ENUMAUDIO:
1154         {
1155                 struct v4l2_audio *p=arg;
1156
1157                 if (!vfd->vidioc_enumaudio)
1158                         break;
1159                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1160                 ret=vfd->vidioc_enumaudio(file, fh, p);
1161                 if (!ret)
1162                         dbgarg2("index=%d, name=%s, capability=%d, "
1163                                         "mode=%d\n",p->index,p->name,
1164                                         p->capability, p->mode);
1165                 break;
1166         }
1167         case VIDIOC_G_AUDIO:
1168         {
1169                 struct v4l2_audio *p=arg;
1170                 __u32 index=p->index;
1171
1172                 if (!vfd->vidioc_g_audio)
1173                         break;
1174
1175                 memset(p,0,sizeof(*p));
1176                 p->index=index;
1177                 dbgarg(cmd, "Get for index=%d\n", p->index);
1178                 ret=vfd->vidioc_g_audio(file, fh, p);
1179                 if (!ret)
1180                         dbgarg2("index=%d, name=%s, capability=%d, "
1181                                         "mode=%d\n",p->index,
1182                                         p->name,p->capability, p->mode);
1183                 break;
1184         }
1185         case VIDIOC_S_AUDIO:
1186         {
1187                 struct v4l2_audio *p=arg;
1188
1189                 if (!vfd->vidioc_s_audio)
1190                         break;
1191                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1192                                         "mode=%d\n", p->index, p->name,
1193                                         p->capability, p->mode);
1194                 ret=vfd->vidioc_s_audio(file, fh, p);
1195                 break;
1196         }
1197         case VIDIOC_ENUMAUDOUT:
1198         {
1199                 struct v4l2_audioout *p=arg;
1200
1201                 if (!vfd->vidioc_enumaudout)
1202                         break;
1203                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1204                 ret=vfd->vidioc_enumaudout(file, fh, p);
1205                 if (!ret)
1206                         dbgarg2("index=%d, name=%s, capability=%d, "
1207                                         "mode=%d\n", p->index, p->name,
1208                                         p->capability,p->mode);
1209                 break;
1210         }
1211         case VIDIOC_G_AUDOUT:
1212         {
1213                 struct v4l2_audioout *p=arg;
1214
1215                 if (!vfd->vidioc_g_audout)
1216                         break;
1217                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1218                 ret=vfd->vidioc_g_audout(file, fh, p);
1219                 if (!ret)
1220                         dbgarg2("index=%d, name=%s, capability=%d, "
1221                                         "mode=%d\n", p->index, p->name,
1222                                         p->capability,p->mode);
1223                 break;
1224         }
1225         case VIDIOC_S_AUDOUT:
1226         {
1227                 struct v4l2_audioout *p=arg;
1228
1229                 if (!vfd->vidioc_s_audout)
1230                         break;
1231                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1232                                         "mode=%d\n", p->index, p->name,
1233                                         p->capability,p->mode);
1234
1235                 ret=vfd->vidioc_s_audout(file, fh, p);
1236                 break;
1237         }
1238         case VIDIOC_G_MODULATOR:
1239         {
1240                 struct v4l2_modulator *p=arg;
1241                 if (!vfd->vidioc_g_modulator)
1242                         break;
1243                 ret=vfd->vidioc_g_modulator(file, fh, p);
1244                 if (!ret)
1245                         dbgarg(cmd, "index=%d, name=%s, "
1246                                         "capability=%d, rangelow=%d,"
1247                                         " rangehigh=%d, txsubchans=%d\n",
1248                                         p->index, p->name,p->capability,
1249                                         p->rangelow, p->rangehigh,
1250                                         p->txsubchans);
1251                 break;
1252         }
1253         case VIDIOC_S_MODULATOR:
1254         {
1255                 struct v4l2_modulator *p=arg;
1256                 if (!vfd->vidioc_s_modulator)
1257                         break;
1258                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1259                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1260                                 p->index, p->name,p->capability,p->rangelow,
1261                                 p->rangehigh,p->txsubchans);
1262                         ret=vfd->vidioc_s_modulator(file, fh, p);
1263                 break;
1264         }
1265         case VIDIOC_G_CROP:
1266         {
1267                 struct v4l2_crop *p=arg;
1268                 if (!vfd->vidioc_g_crop)
1269                         break;
1270                 ret=vfd->vidioc_g_crop(file, fh, p);
1271                 if (!ret) {
1272                         dbgarg(cmd, "type=%d\n", p->type);
1273                         dbgrect(vfd, "", &p->c);
1274                 }
1275                 break;
1276         }
1277         case VIDIOC_S_CROP:
1278         {
1279                 struct v4l2_crop *p=arg;
1280                 if (!vfd->vidioc_s_crop)
1281                         break;
1282                 dbgarg(cmd, "type=%d\n", p->type);
1283                 dbgrect(vfd, "", &p->c);
1284                 ret=vfd->vidioc_s_crop(file, fh, p);
1285                 break;
1286         }
1287         case VIDIOC_CROPCAP:
1288         {
1289                 struct v4l2_cropcap *p=arg;
1290                 /*FIXME: Should also show v4l2_fract pixelaspect */
1291                 if (!vfd->vidioc_cropcap)
1292                         break;
1293                 dbgarg(cmd, "type=%d\n", p->type);
1294                 dbgrect(vfd, "bounds ", &p->bounds);
1295                 dbgrect(vfd, "defrect ", &p->defrect);
1296                 ret=vfd->vidioc_cropcap(file, fh, p);
1297                 break;
1298         }
1299         case VIDIOC_G_MPEGCOMP:
1300         {
1301                 struct v4l2_mpeg_compression *p=arg;
1302
1303                 /*FIXME: Several fields not shown */
1304                 if (!vfd->vidioc_g_mpegcomp)
1305                         break;
1306                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1307                 if (!ret)
1308                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1309                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1310                                         "ps_size=%d, au_sample_rate=%d, "
1311                                         "au_pesid=%c, vi_frame_rate=%d, "
1312                                         "vi_frames_per_gop=%d, "
1313                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1314                                         p->ts_pid_pmt,p->ts_pid_audio,
1315                                         p->ts_pid_video,p->ts_pid_pcr,
1316                                         p->ps_size, p->au_sample_rate,
1317                                         p->au_pesid, p->vi_frame_rate,
1318                                         p->vi_frames_per_gop,
1319                                         p->vi_bframes_count, p->vi_pesid);
1320                 break;
1321         }
1322         case VIDIOC_S_MPEGCOMP:
1323         {
1324                 struct v4l2_mpeg_compression *p=arg;
1325                 /*FIXME: Several fields not shown */
1326                 if (!vfd->vidioc_s_mpegcomp)
1327                         break;
1328                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1329                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1330                                 "au_sample_rate=%d, au_pesid=%c, "
1331                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1332                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1333                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1334                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1335                                 p->au_pesid, p->vi_frame_rate,
1336                                 p->vi_frames_per_gop, p->vi_bframes_count,
1337                                 p->vi_pesid);
1338                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1339                 break;
1340         }
1341         case VIDIOC_G_JPEGCOMP:
1342         {
1343                 struct v4l2_jpegcompression *p=arg;
1344                 if (!vfd->vidioc_g_jpegcomp)
1345                         break;
1346                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1347                 if (!ret)
1348                         dbgarg (cmd, "quality=%d, APPn=%d, "
1349                                                 "APP_len=%d, COM_len=%d, "
1350                                                 "jpeg_markers=%d\n",
1351                                                 p->quality,p->APPn,p->APP_len,
1352                                                 p->COM_len,p->jpeg_markers);
1353                 break;
1354         }
1355         case VIDIOC_S_JPEGCOMP:
1356         {
1357                 struct v4l2_jpegcompression *p=arg;
1358                 if (!vfd->vidioc_g_jpegcomp)
1359                         break;
1360                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1361                                         "COM_len=%d, jpeg_markers=%d\n",
1362                                         p->quality,p->APPn,p->APP_len,
1363                                         p->COM_len,p->jpeg_markers);
1364                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1365                 break;
1366         }
1367         case VIDIOC_G_ENC_INDEX:
1368         {
1369                 struct v4l2_enc_idx *p=arg;
1370
1371                 if (!vfd->vidioc_g_enc_index)
1372                         break;
1373                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1374                 if (!ret)
1375                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1376                                         p->entries,p->entries_cap);
1377                 break;
1378         }
1379         case VIDIOC_ENCODER_CMD:
1380         {
1381                 struct v4l2_encoder_cmd *p=arg;
1382
1383                 if (!vfd->vidioc_encoder_cmd)
1384                         break;
1385                 ret=vfd->vidioc_encoder_cmd(file, fh, p);
1386                 if (!ret)
1387                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1388                                         p->cmd,p->flags);
1389                 break;
1390         }
1391         case VIDIOC_TRY_ENCODER_CMD:
1392         {
1393                 struct v4l2_encoder_cmd *p=arg;
1394
1395                 if (!vfd->vidioc_try_encoder_cmd)
1396                         break;
1397                 ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
1398                 if (!ret)
1399                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1400                                         p->cmd,p->flags);
1401                 break;
1402         }
1403         case VIDIOC_G_PARM:
1404         {
1405                 struct v4l2_streamparm *p=arg;
1406                 __u32 type=p->type;
1407
1408                 memset(p,0,sizeof(*p));
1409                 p->type=type;
1410
1411                 if (vfd->vidioc_g_parm) {
1412                         ret=vfd->vidioc_g_parm(file, fh, p);
1413                 } else {
1414                         struct v4l2_standard s;
1415
1416                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1417                                 return -EINVAL;
1418
1419                         v4l2_video_std_construct(&s, vfd->current_norm,
1420                                                  v4l2_norm_to_name(vfd->current_norm));
1421
1422                         p->parm.capture.timeperframe = s.frameperiod;
1423                         ret=0;
1424                 }
1425
1426                 dbgarg (cmd, "type=%d\n", p->type);
1427                 break;
1428         }
1429         case VIDIOC_S_PARM:
1430         {
1431                 struct v4l2_streamparm *p=arg;
1432                 if (!vfd->vidioc_s_parm)
1433                         break;
1434                 dbgarg (cmd, "type=%d\n", p->type);
1435                 ret=vfd->vidioc_s_parm(file, fh, p);
1436                 break;
1437         }
1438         case VIDIOC_G_TUNER:
1439         {
1440                 struct v4l2_tuner *p=arg;
1441                 __u32 index=p->index;
1442
1443                 if (!vfd->vidioc_g_tuner)
1444                         break;
1445
1446                 memset(p,0,sizeof(*p));
1447                 p->index=index;
1448
1449                 ret=vfd->vidioc_g_tuner(file, fh, p);
1450                 if (!ret)
1451                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1452                                         "capability=%d, rangelow=%d, "
1453                                         "rangehigh=%d, signal=%d, afc=%d, "
1454                                         "rxsubchans=%d, audmode=%d\n",
1455                                         p->index, p->name, p->type,
1456                                         p->capability, p->rangelow,
1457                                         p->rangehigh, p->rxsubchans,
1458                                         p->audmode, p->signal, p->afc);
1459                 break;
1460         }
1461         case VIDIOC_S_TUNER:
1462         {
1463                 struct v4l2_tuner *p=arg;
1464                 if (!vfd->vidioc_s_tuner)
1465                         break;
1466                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1467                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1468                                 "signal=%d, afc=%d, rxsubchans=%d, "
1469                                 "audmode=%d\n",p->index, p->name, p->type,
1470                                 p->capability, p->rangelow,p->rangehigh,
1471                                 p->rxsubchans, p->audmode, p->signal,
1472                                 p->afc);
1473                 ret=vfd->vidioc_s_tuner(file, fh, p);
1474                 break;
1475         }
1476         case VIDIOC_G_FREQUENCY:
1477         {
1478                 struct v4l2_frequency *p=arg;
1479                 if (!vfd->vidioc_g_frequency)
1480                         break;
1481
1482                 memset(p,0,sizeof(*p));
1483
1484                 ret=vfd->vidioc_g_frequency(file, fh, p);
1485                 if (!ret)
1486                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1487                                                 p->tuner,p->type,p->frequency);
1488                 break;
1489         }
1490         case VIDIOC_S_FREQUENCY:
1491         {
1492                 struct v4l2_frequency *p=arg;
1493                 if (!vfd->vidioc_s_frequency)
1494                         break;
1495                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1496                                 p->tuner,p->type,p->frequency);
1497                 ret=vfd->vidioc_s_frequency(file, fh, p);
1498                 break;
1499         }
1500         case VIDIOC_G_SLICED_VBI_CAP:
1501         {
1502                 struct v4l2_sliced_vbi_cap *p=arg;
1503                 if (!vfd->vidioc_g_sliced_vbi_cap)
1504                         break;
1505                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1506                 if (!ret)
1507                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1508                 break;
1509         }
1510         case VIDIOC_LOG_STATUS:
1511         {
1512                 if (!vfd->vidioc_log_status)
1513                         break;
1514                 ret=vfd->vidioc_log_status(file, fh);
1515                 break;
1516         }
1517 #ifdef CONFIG_VIDEO_ADV_DEBUG
1518         case VIDIOC_DBG_G_REGISTER:
1519         {
1520                 struct v4l2_register *p=arg;
1521                 if (!capable(CAP_SYS_ADMIN))
1522                         ret=-EPERM;
1523                 else if (vfd->vidioc_g_register)
1524                         ret=vfd->vidioc_g_register(file, fh, p);
1525                 break;
1526         }
1527         case VIDIOC_DBG_S_REGISTER:
1528         {
1529                 struct v4l2_register *p=arg;
1530                 if (!capable(CAP_SYS_ADMIN))
1531                         ret=-EPERM;
1532                 else if (vfd->vidioc_s_register)
1533                         ret=vfd->vidioc_s_register(file, fh, p);
1534                 break;
1535         }
1536 #endif
1537         case VIDIOC_G_CHIP_IDENT:
1538         {
1539                 struct v4l2_chip_ident *p=arg;
1540                 if (!vfd->vidioc_g_chip_ident)
1541                         break;
1542                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1543                 if (!ret)
1544                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1545                 break;
1546         }
1547         } /* switch */
1548
1549         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1550                 if (ret<0) {
1551                         printk ("%s: err:\n", vfd->name);
1552                         v4l_print_ioctl(vfd->name, cmd);
1553                 }
1554         }
1555
1556         return ret;
1557 }
1558
1559 int video_ioctl2 (struct inode *inode, struct file *file,
1560                unsigned int cmd, unsigned long arg)
1561 {
1562         char    sbuf[128];
1563         void    *mbuf = NULL;
1564         void    *parg = NULL;
1565         int     err  = -EINVAL;
1566         int     is_ext_ctrl;
1567         size_t  ctrls_size = 0;
1568         void __user *user_ptr = NULL;
1569
1570 #ifdef __OLD_VIDIOC_
1571         cmd = video_fix_command(cmd);
1572 #endif
1573         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1574                        cmd == VIDIOC_TRY_EXT_CTRLS);
1575
1576         /*  Copy arguments into temp kernel buffer  */
1577         switch (_IOC_DIR(cmd)) {
1578         case _IOC_NONE:
1579                 parg = NULL;
1580                 break;
1581         case _IOC_READ:
1582         case _IOC_WRITE:
1583         case (_IOC_WRITE | _IOC_READ):
1584                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1585                         parg = sbuf;
1586                 } else {
1587                         /* too big to allocate from stack */
1588                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1589                         if (NULL == mbuf)
1590                                 return -ENOMEM;
1591                         parg = mbuf;
1592                 }
1593
1594                 err = -EFAULT;
1595                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1596                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1597                                 goto out;
1598                 break;
1599         }
1600
1601         if (is_ext_ctrl) {
1602                 struct v4l2_ext_controls *p = parg;
1603
1604                 /* In case of an error, tell the caller that it wasn't
1605                    a specific control that caused it. */
1606                 p->error_idx = p->count;
1607                 user_ptr = (void __user *)p->controls;
1608                 if (p->count) {
1609                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1610                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1611                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1612                         err = -ENOMEM;
1613                         if (NULL == mbuf)
1614                                 goto out_ext_ctrl;
1615                         err = -EFAULT;
1616                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1617                                 goto out_ext_ctrl;
1618                         p->controls = mbuf;
1619                 }
1620         }
1621
1622         /* Handles IOCTL */
1623         err = __video_do_ioctl(inode, file, cmd, parg);
1624         if (err == -ENOIOCTLCMD)
1625                 err = -EINVAL;
1626         if (is_ext_ctrl) {
1627                 struct v4l2_ext_controls *p = parg;
1628
1629                 p->controls = (void *)user_ptr;
1630                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1631                         err = -EFAULT;
1632                 goto out_ext_ctrl;
1633         }
1634         if (err < 0)
1635                 goto out;
1636
1637 out_ext_ctrl:
1638         /*  Copy results into user buffer  */
1639         switch (_IOC_DIR(cmd))
1640         {
1641         case _IOC_READ:
1642         case (_IOC_WRITE | _IOC_READ):
1643                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1644                         err = -EFAULT;
1645                 break;
1646         }
1647
1648 out:
1649         kfree(mbuf);
1650         return err;
1651 }
1652
1653
1654 static const struct file_operations video_fops;
1655
1656 /**
1657  *      video_register_device - register video4linux devices
1658  *      @vfd:  video device structure we want to register
1659  *      @type: type of device to register
1660  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1661  *             -1 == first free)
1662  *
1663  *      The registration code assigns minor numbers based on the type
1664  *      requested. -ENFILE is returned in all the device slots for this
1665  *      category are full. If not then the minor field is set and the
1666  *      driver initialize function is called (if non %NULL).
1667  *
1668  *      Zero is returned on success.
1669  *
1670  *      Valid types are
1671  *
1672  *      %VFL_TYPE_GRABBER - A frame grabber
1673  *
1674  *      %VFL_TYPE_VTX - A teletext device
1675  *
1676  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1677  *
1678  *      %VFL_TYPE_RADIO - A radio card
1679  */
1680
1681 int video_register_device(struct video_device *vfd, int type, int nr)
1682 {
1683         int i=0;
1684         int base;
1685         int end;
1686         int ret;
1687         char *name_base;
1688
1689         switch(type)
1690         {
1691                 case VFL_TYPE_GRABBER:
1692                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1693                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1694                         name_base = "video";
1695                         break;
1696                 case VFL_TYPE_VTX:
1697                         base=MINOR_VFL_TYPE_VTX_MIN;
1698                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1699                         name_base = "vtx";
1700                         break;
1701                 case VFL_TYPE_VBI:
1702                         base=MINOR_VFL_TYPE_VBI_MIN;
1703                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1704                         name_base = "vbi";
1705                         break;
1706                 case VFL_TYPE_RADIO:
1707                         base=MINOR_VFL_TYPE_RADIO_MIN;
1708                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1709                         name_base = "radio";
1710                         break;
1711                 default:
1712                         printk(KERN_ERR "%s called with unknown type: %d\n",
1713                                __FUNCTION__, type);
1714                         return -1;
1715         }
1716
1717         /* pick a minor number */
1718         mutex_lock(&videodev_lock);
1719         if (nr >= 0  &&  nr < end-base) {
1720                 /* use the one the driver asked for */
1721                 i = base+nr;
1722                 if (NULL != video_device[i]) {
1723                         mutex_unlock(&videodev_lock);
1724                         return -ENFILE;
1725                 }
1726         } else {
1727                 /* use first free */
1728                 for(i=base;i<end;i++)
1729                         if (NULL == video_device[i])
1730                                 break;
1731                 if (i == end) {
1732                         mutex_unlock(&videodev_lock);
1733                         return -ENFILE;
1734                 }
1735         }
1736         video_device[i]=vfd;
1737         vfd->minor=i;
1738         mutex_unlock(&videodev_lock);
1739         mutex_init(&vfd->lock);
1740
1741         /* sysfs class */
1742         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1743         if (vfd->dev)
1744                 vfd->class_dev.dev = vfd->dev;
1745         vfd->class_dev.class       = &video_class;
1746         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1747         sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
1748         ret = class_device_register(&vfd->class_dev);
1749         if (ret < 0) {
1750                 printk(KERN_ERR "%s: class_device_register failed\n",
1751                        __FUNCTION__);
1752                 goto fail_minor;
1753         }
1754         ret = class_device_create_file(&vfd->class_dev, &class_device_attr_name);
1755         if (ret < 0) {
1756                 printk(KERN_ERR "%s: class_device_create_file 'name' failed\n",
1757                        __FUNCTION__);
1758                 goto fail_classdev;
1759         }
1760
1761 #if 1
1762         /* needed until all drivers are fixed */
1763         if (!vfd->release)
1764                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1765                        "Please fix your driver for proper sysfs support, see "
1766                        "http://lwn.net/Articles/36850/\n", vfd->name);
1767 #endif
1768         return 0;
1769
1770 fail_classdev:
1771         class_device_unregister(&vfd->class_dev);
1772 fail_minor:
1773         mutex_lock(&videodev_lock);
1774         video_device[vfd->minor] = NULL;
1775         vfd->minor = -1;
1776         mutex_unlock(&videodev_lock);
1777         return ret;
1778 }
1779
1780 /**
1781  *      video_unregister_device - unregister a video4linux device
1782  *      @vfd: the device to unregister
1783  *
1784  *      This unregisters the passed device and deassigns the minor
1785  *      number. Future open calls will be met with errors.
1786  */
1787
1788 void video_unregister_device(struct video_device *vfd)
1789 {
1790         mutex_lock(&videodev_lock);
1791         if(video_device[vfd->minor]!=vfd)
1792                 panic("videodev: bad unregister");
1793
1794         video_device[vfd->minor]=NULL;
1795         class_device_unregister(&vfd->class_dev);
1796         mutex_unlock(&videodev_lock);
1797 }
1798
1799 /*
1800  * Video fs operations
1801  */
1802 static const struct file_operations video_fops=
1803 {
1804         .owner          = THIS_MODULE,
1805         .llseek         = no_llseek,
1806         .open           = video_open,
1807 };
1808
1809 /*
1810  *      Initialise video for linux
1811  */
1812
1813 static int __init videodev_init(void)
1814 {
1815         int ret;
1816
1817         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1818         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1819                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1820                 return -EIO;
1821         }
1822
1823         ret = class_register(&video_class);
1824         if (ret < 0) {
1825                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1826                 printk(KERN_WARNING "video_dev: class_register failed\n");
1827                 return -EIO;
1828         }
1829
1830         return 0;
1831 }
1832
1833 static void __exit videodev_exit(void)
1834 {
1835         class_unregister(&video_class);
1836         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1837 }
1838
1839 module_init(videodev_init)
1840 module_exit(videodev_exit)
1841
1842 EXPORT_SYMBOL(video_register_device);
1843 EXPORT_SYMBOL(video_unregister_device);
1844 EXPORT_SYMBOL(video_devdata);
1845 EXPORT_SYMBOL(video_usercopy);
1846 EXPORT_SYMBOL(video_exclusive_open);
1847 EXPORT_SYMBOL(video_exclusive_release);
1848 EXPORT_SYMBOL(video_ioctl2);
1849 EXPORT_SYMBOL(video_device_alloc);
1850 EXPORT_SYMBOL(video_device_release);
1851
1852 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1853 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1854 MODULE_LICENSE("GPL");
1855
1856
1857 /*
1858  * Local variables:
1859  * c-basic-offset: 8
1860  * End:
1861  */