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 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 441         /***********************************************************
 442          Handles calls to the obsoleted V4L1 API
 443          Due to the nature of VIDIOCGMBUF, each driver that supports
 444          V4L1 should implement its own handler for this ioctl.
 445          ***********************************************************/
 446
 447         /* --- streaming capture ------------------------------------- */
 448         if (cmd == VIDIOCGMBUF) {
 449                 struct video_mbuf *p=arg;
 450
 451                 memset(p,0,sizeof(p));
 452
 453                 if (!vfd->vidiocgmbuf)
 454                         return ret;
 455                 ret=vfd->vidiocgmbuf(file, fh, p);
 456                 if (!ret)
 457                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 458                                                 p->size, p->frames,
 459                                                 (unsigned long)p->offsets);
 460                 return ret;
 461         }
 462
 463         /********************************************************
 464          All other V4L1 calls are handled by v4l1_compat module.
 465          Those calls will be translated into V4L2 calls, and
 466          __video_do_ioctl will be called again, with one or more
 467          V4L2 ioctls.
 468          ********************************************************/
 469         if (_IOC_TYPE(cmd)=='v')
 470                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 471                                                 __video_do_ioctl);
 472 #endif
 473
 474         switch(cmd) {
 475         /* --- capabilities ------------------------------------------ */
 476         case VIDIOC_QUERYCAP:
 477         {
 478                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 479                 memset(cap, 0, sizeof(*cap));
 480
 481                 if (!vfd->vidioc_querycap)
 482                         break;
 483
 484                 ret=vfd->vidioc_querycap(file, fh, cap);
 485                 if (!ret)
 486                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 487                                         "version=0x%08x, "
 488                                         "capabilities=0x%08x\n",
 489                                         cap->driver,cap->card,cap->bus_info,
 490                                         cap->version,
 491                                         cap->capabilities);
 492                 break;
 493         }
 494
 495         /* --- priority ------------------------------------------ */
 496         case VIDIOC_G_PRIORITY:
 497         {
 498                 enum v4l2_priority *p=arg;
 499
 500                 if (!vfd->vidioc_g_priority)
 501                         break;
 502                 ret=vfd->vidioc_g_priority(file, fh, p);
 503                 if (!ret)
 504                         dbgarg(cmd, "priority is %d\n", *p);
 505                 break;
 506         }
 507         case VIDIOC_S_PRIORITY:
 508         {
 509                 enum v4l2_priority *p=arg;
 510
 511                 if (!vfd->vidioc_s_priority)
 512                         break;
 513                 dbgarg(cmd, "setting priority to %d\n", *p);
 514                 ret=vfd->vidioc_s_priority(file, fh, *p);
 515                 break;
 516         }
 517
 518         /* --- capture ioctls ---------------------------------------- */
 519         case VIDIOC_ENUM_FMT:
 520         {
 521                 struct v4l2_fmtdesc *f = arg;
 522                 enum v4l2_buf_type type;
 523                 unsigned int index;
 524
 525                 index = f->index;
 526                 type  = f->type;
 527                 memset(f,0,sizeof(*f));
 528                 f->index = index;
 529                 f->type  = type;
 530
 531                 switch (type) {
 532                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 533                         if (vfd->vidioc_enum_fmt_cap)
 534                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 535                         break;
 536                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 537                         if (vfd->vidioc_enum_fmt_overlay)
 538                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 539                         break;
 540                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 541                         if (vfd->vidioc_enum_fmt_vbi)
 542                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 543                         break;
 544                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 545                         if (vfd->vidioc_enum_fmt_vbi_output)
 546                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 547                                                                 fh, f);
 548                         break;
 549                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 550                         if (vfd->vidioc_enum_fmt_vbi_capture)
 551                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 552                                                                 fh, f);
 553                         break;
 554                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 555                         if (vfd->vidioc_enum_fmt_video_output)
 556                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 557                                                                 fh, f);
 558                         break;
 559                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 560                         if (vfd->vidioc_enum_fmt_vbi_output)
 561                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 562                                                                 fh, f);
 563                         break;
 564                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 565                         if (vfd->vidioc_enum_fmt_output_overlay)
 566                                 ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
 567                         break;
 568                 case V4L2_BUF_TYPE_PRIVATE:
 569                         if (vfd->vidioc_enum_fmt_type_private)
 570                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 571                                                                 fh, f);
 572                         break;
 573                 }
 574                 if (!ret)
 575                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 576                                         "pixelformat=%c%c%c%c, description='%s'\n",
 577                                         f->index, f->type, f->flags,
 578                                         (f->pixelformat & 0xff),
 579                                         (f->pixelformat >>  8) & 0xff,
 580                                         (f->pixelformat >> 16) & 0xff,
 581                                         (f->pixelformat >> 24) & 0xff,
 582                                         f->description);
 583                 break;
 584         }
 585         case VIDIOC_G_FMT:
 586         {
 587                 struct v4l2_format *f = (struct v4l2_format *)arg;
 588                 enum v4l2_buf_type type=f->type;
 589
 590                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 591                 f->type=type;
 592
 593                 /* FIXME: Should be one dump per type */
 594                 dbgarg (cmd, "type=%s\n", prt_names(type,
 595                                         v4l2_type_names_FIXME));
 596
 597                 switch (type) {
 598                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 599                         if (vfd->vidioc_g_fmt_cap)
 600                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 601                         if (!ret)
 602                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 603                         break;
 604                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 605                         if (vfd->vidioc_g_fmt_overlay)
 606                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 607                         break;
 608                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 609                         if (vfd->vidioc_g_fmt_vbi)
 610                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 611                         break;
 612                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 613                         if (vfd->vidioc_g_fmt_vbi_output)
 614                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 615                         break;
 616                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 617                         if (vfd->vidioc_g_fmt_vbi_capture)
 618                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 619                         break;
 620                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 621                         if (vfd->vidioc_g_fmt_video_output)
 622                                 ret=vfd->vidioc_g_fmt_video_output(file,
 623                                                                 fh, f);
 624                         break;
 625                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 626                         if (vfd->vidioc_g_fmt_output_overlay)
 627                                 ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
 628                         break;
 629                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 630                         if (vfd->vidioc_g_fmt_vbi_output)
 631                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 632                         break;
 633                 case V4L2_BUF_TYPE_PRIVATE:
 634                         if (vfd->vidioc_g_fmt_type_private)
 635                                 ret=vfd->vidioc_g_fmt_type_private(file,
 636                                                                 fh, f);
 637                         break;
 638                 }
 639
 640                 break;
 641         }
 642         case VIDIOC_S_FMT:
 643         {
 644                 struct v4l2_format *f = (struct v4l2_format *)arg;
 645
 646                 /* FIXME: Should be one dump per type */
 647                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 648                                         v4l2_type_names_FIXME));
 649
 650                 switch (f->type) {
 651                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 652                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 653                         if (vfd->vidioc_s_fmt_cap)
 654                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 655                         break;
 656                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 657                         if (vfd->vidioc_s_fmt_overlay)
 658                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 659                         break;
 660                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 661                         if (vfd->vidioc_s_fmt_vbi)
 662                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 663                         break;
 664                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 665                         if (vfd->vidioc_s_fmt_vbi_output)
 666                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 667                         break;
 668                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 669                         if (vfd->vidioc_s_fmt_vbi_capture)
 670                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 671                         break;
 672                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 673                         if (vfd->vidioc_s_fmt_video_output)
 674                                 ret=vfd->vidioc_s_fmt_video_output(file,
 675                                                                 fh, f);
 676                         break;
 677                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 678                         if (vfd->vidioc_s_fmt_output_overlay)
 679                                 ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
 680                         break;
 681                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 682                         if (vfd->vidioc_s_fmt_vbi_output)
 683                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 684                                                                 fh, f);
 685                         break;
 686                 case V4L2_BUF_TYPE_PRIVATE:
 687                         if (vfd->vidioc_s_fmt_type_private)
 688                                 ret=vfd->vidioc_s_fmt_type_private(file,
 689                                                                 fh, f);
 690                         break;
 691                 }
 692                 break;
 693         }
 694         case VIDIOC_TRY_FMT:
 695         {
 696                 struct v4l2_format *f = (struct v4l2_format *)arg;
 697
 698                 /* FIXME: Should be one dump per type */
 699                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 700                                                 v4l2_type_names_FIXME));
 701                 switch (f->type) {
 702                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 703                         if (vfd->vidioc_try_fmt_cap)
 704                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 705                         if (!ret)
 706                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 707                         break;
 708                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 709                         if (vfd->vidioc_try_fmt_overlay)
 710                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 711                         break;
 712                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 713                         if (vfd->vidioc_try_fmt_vbi)
 714                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 715                         break;
 716                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 717                         if (vfd->vidioc_try_fmt_vbi_output)
 718                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 719                                                                 fh, f);
 720                         break;
 721                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 722                         if (vfd->vidioc_try_fmt_vbi_capture)
 723                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 724                                                                 fh, f);
 725                         break;
 726                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 727                         if (vfd->vidioc_try_fmt_video_output)
 728                                 ret=vfd->vidioc_try_fmt_video_output(file,
 729                                                                 fh, f);
 730                         break;
 731                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 732                         if (vfd->vidioc_try_fmt_output_overlay)
 733                                 ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
 734                         break;
 735                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 736                         if (vfd->vidioc_try_fmt_vbi_output)
 737                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 738                                                                 fh, f);
 739                         break;
 740                 case V4L2_BUF_TYPE_PRIVATE:
 741                         if (vfd->vidioc_try_fmt_type_private)
 742                                 ret=vfd->vidioc_try_fmt_type_private(file,
 743                                                                 fh, f);
 744                         break;
 745                 }
 746
 747                 break;
 748         }
 749         /* FIXME: Those buf reqs could be handled here,
 750            with some changes on videobuf to allow its header to be included at
 751            videodev2.h or being merged at videodev2.
 752          */
 753         case VIDIOC_REQBUFS:
 754         {
 755                 struct v4l2_requestbuffers *p=arg;
 756
 757                 if (!vfd->vidioc_reqbufs)
 758                         break;
 759                 ret = check_fmt (vfd, p->type);
 760                 if (ret)
 761                         break;
 762
 763                 ret=vfd->vidioc_reqbufs(file, fh, p);
 764                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 765                                 p->count,
 766                                 prt_names(p->type,v4l2_type_names_FIXME),
 767                                 prt_names(p->memory,v4l2_memory_names));
 768                 break;
 769         }
 770         case VIDIOC_QUERYBUF:
 771         {
 772                 struct v4l2_buffer *p=arg;
 773
 774                 if (!vfd->vidioc_querybuf)
 775                         break;
 776                 ret = check_fmt (vfd, p->type);
 777                 if (ret)
 778                         break;
 779
 780                 ret=vfd->vidioc_querybuf(file, fh, p);
 781                 if (!ret)
 782                         dbgbuf(cmd,vfd,p);
 783                 break;
 784         }
 785         case VIDIOC_QBUF:
 786         {
 787                 struct v4l2_buffer *p=arg;
 788
 789                 if (!vfd->vidioc_qbuf)
 790                         break;
 791                 ret = check_fmt (vfd, p->type);
 792                 if (ret)
 793                         break;
 794
 795                 ret=vfd->vidioc_qbuf(file, fh, p);
 796                 if (!ret)
 797                         dbgbuf(cmd,vfd,p);
 798                 break;
 799         }
 800         case VIDIOC_DQBUF:
 801         {
 802                 struct v4l2_buffer *p=arg;
 803                 if (!vfd->vidioc_dqbuf)
 804                         break;
 805                 ret = check_fmt (vfd, p->type);
 806                 if (ret)
 807                         break;
 808
 809                 ret=vfd->vidioc_dqbuf(file, fh, p);
 810                 if (!ret)
 811                         dbgbuf(cmd,vfd,p);
 812                 break;
 813         }
 814         case VIDIOC_OVERLAY:
 815         {
 816                 int *i = arg;
 817
 818                 if (!vfd->vidioc_overlay)
 819                         break;
 820                 dbgarg (cmd, "value=%d\n",*i);
 821                 ret=vfd->vidioc_overlay(file, fh, *i);
 822                 break;
 823         }
 824         case VIDIOC_G_FBUF:
 825         {
 826                 struct v4l2_framebuffer *p=arg;
 827                 if (!vfd->vidioc_g_fbuf)
 828                         break;
 829                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 830                 if (!ret) {
 831                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 832                                         p->capability,p->flags,
 833                                         (unsigned long)p->base);
 834                         v4l_print_pix_fmt (vfd, &p->fmt);
 835                 }
 836                 break;
 837         }
 838         case VIDIOC_S_FBUF:
 839         {
 840                 struct v4l2_framebuffer *p=arg;
 841                 if (!vfd->vidioc_s_fbuf)
 842                         break;
 843
 844                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 845                                 p->capability,p->flags,(unsigned long)p->base);
 846                 v4l_print_pix_fmt (vfd, &p->fmt);
 847                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 848
 849                 break;
 850         }
 851         case VIDIOC_STREAMON:
 852         {
 853                 enum v4l2_buf_type i = *(int *)arg;
 854                 if (!vfd->vidioc_streamon)
 855                         break;
 856                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 857                 ret=vfd->vidioc_streamon(file, fh,i);
 858                 break;
 859         }
 860         case VIDIOC_STREAMOFF:
 861         {
 862                 enum v4l2_buf_type i = *(int *)arg;
 863
 864                 if (!vfd->vidioc_streamoff)
 865                         break;
 866                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 867                 ret=vfd->vidioc_streamoff(file, fh, i);
 868                 break;
 869         }
 870         /* ---------- tv norms ---------- */
 871         case VIDIOC_ENUMSTD:
 872         {
 873                 struct v4l2_standard *p = arg;
 874                 v4l2_std_id id = vfd->tvnorms,curr_id=0;
 875                 unsigned int index = p->index,i;
 876
 877                 if (index<0) {
 878                         ret=-EINVAL;
 879                         break;
 880                 }
 881
 882                 /* Return norm array on a canonical way */
 883                 for (i=0;i<= index && id; i++) {
 884                         if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
 885                                 curr_id = V4L2_STD_PAL;
 886                         } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
 887                                 curr_id = V4L2_STD_PAL_BG;
 888                         } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
 889                                 curr_id = V4L2_STD_PAL_DK;
 890                         } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
 891                                 curr_id = V4L2_STD_PAL_B;
 892                         } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
 893                                 curr_id = V4L2_STD_PAL_B1;
 894                         } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
 895                                 curr_id = V4L2_STD_PAL_G;
 896                         } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
 897                                 curr_id = V4L2_STD_PAL_H;
 898                         } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
 899                                 curr_id = V4L2_STD_PAL_I;
 900                         } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
 901                                 curr_id = V4L2_STD_PAL_D;
 902                         } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
 903                                 curr_id = V4L2_STD_PAL_D1;
 904                         } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
 905                                 curr_id = V4L2_STD_PAL_K;
 906                         } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
 907                                 curr_id = V4L2_STD_PAL_M;
 908                         } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
 909                                 curr_id = V4L2_STD_PAL_N;
 910                         } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
 911                                 curr_id = V4L2_STD_PAL_Nc;
 912                         } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
 913                                 curr_id = V4L2_STD_PAL_60;
 914                         } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
 915                                 curr_id = V4L2_STD_NTSC;
 916                         } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
 917                                 curr_id = V4L2_STD_NTSC_M;
 918                         } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
 919                                 curr_id = V4L2_STD_NTSC_M_JP;
 920                         } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
 921                                 curr_id = V4L2_STD_NTSC_443;
 922                         } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
 923                                 curr_id = V4L2_STD_NTSC_M_KR;
 924                         } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 925                                 curr_id = V4L2_STD_SECAM;
 926                         } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
 927                                 curr_id = V4L2_STD_SECAM_DK;
 928                         } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
 929                                 curr_id = V4L2_STD_SECAM_B;
 930                         } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
 931                                 curr_id = V4L2_STD_SECAM_D;
 932                         } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
 933                                 curr_id = V4L2_STD_SECAM_G;
 934                         } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
 935                                 curr_id = V4L2_STD_SECAM_H;
 936                         } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
 937                                 curr_id = V4L2_STD_SECAM_K;
 938                         } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
 939                                 curr_id = V4L2_STD_SECAM_K1;
 940                         } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
 941                                 curr_id = V4L2_STD_SECAM_L;
 942                         } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
 943                                 curr_id = V4L2_STD_SECAM_LC;
 944                         } else {
 945                                 break;
 946                         }
 947                         id &= ~curr_id;
 948                 }
 949                 if (i<=index)
 950                         return -EINVAL;
 951
 952                 v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
 953                 p->index = index;
 954
 955                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 956                                 "framelines=%d\n", p->index,
 957                                 (unsigned long long)p->id, p->name,
 958                                 p->frameperiod.numerator,
 959                                 p->frameperiod.denominator,
 960                                 p->framelines);
 961
 962                 ret=0;
 963                 break;
 964         }
 965         case VIDIOC_G_STD:
 966         {
 967                 v4l2_std_id *id = arg;
 968
 969                 *id = vfd->current_norm;
 970
 971                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 972
 973                 ret=0;
 974                 break;
 975         }
 976         case VIDIOC_S_STD:
 977         {
 978                 v4l2_std_id *id = arg,norm;
 979
 980                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 981
 982                 norm = (*id) & vfd->tvnorms;
 983                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
 984                         break;
 985
 986                 /* Calls the specific handler */
 987                 if (vfd->vidioc_s_std)
 988                         ret=vfd->vidioc_s_std(file, fh, &norm);
 989                 else
 990                         ret=-EINVAL;
 991
 992                 /* Updates standard information */
 993                 if (ret>=0)
 994                         vfd->current_norm=norm;
 995
 996                 break;
 997         }
 998         case VIDIOC_QUERYSTD:
 999         {
1000                 v4l2_std_id *p=arg;
1001
1002                 if (!vfd->vidioc_querystd)
1003                         break;
1004                 ret=vfd->vidioc_querystd(file, fh, arg);
1005                 if (!ret)
1006                         dbgarg (cmd, "detected std=%Lu\n",
1007                                                 (unsigned long long)*p);
1008                 break;
1009         }
1010         /* ------ input switching ---------- */
1011         /* FIXME: Inputs can be handled inside videodev2 */
1012         case VIDIOC_ENUMINPUT:
1013         {
1014                 struct v4l2_input *p=arg;
1015                 int i=p->index;
1016
1017                 if (!vfd->vidioc_enum_input)
1018                         break;
1019                 memset(p, 0, sizeof(*p));
1020                 p->index=i;
1021
1022                 ret=vfd->vidioc_enum_input(file, fh, p);
1023                 if (!ret)
1024                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1025                                         "audioset=%d, "
1026                                         "tuner=%d, std=%Ld, status=%d\n",
1027                                         p->index,p->name,p->type,p->audioset,
1028                                         p->tuner,
1029                                         (unsigned long long)p->std,
1030                                         p->status);
1031                 break;
1032         }
1033         case VIDIOC_G_INPUT:
1034         {
1035                 unsigned int *i = arg;
1036
1037                 if (!vfd->vidioc_g_input)
1038                         break;
1039                 ret=vfd->vidioc_g_input(file, fh, i);
1040                 if (!ret)
1041                         dbgarg (cmd, "value=%d\n",*i);
1042                 break;
1043         }
1044         case VIDIOC_S_INPUT:
1045         {
1046                 unsigned int *i = arg;
1047
1048                 if (!vfd->vidioc_s_input)
1049                         break;
1050                 dbgarg (cmd, "value=%d\n",*i);
1051                 ret=vfd->vidioc_s_input(file, fh, *i);
1052                 break;
1053         }
1054
1055         /* ------ output switching ---------- */
1056         case VIDIOC_G_OUTPUT:
1057         {
1058                 unsigned int *i = arg;
1059
1060                 if (!vfd->vidioc_g_output)
1061                         break;
1062                 ret=vfd->vidioc_g_output(file, fh, i);
1063                 if (!ret)
1064                         dbgarg (cmd, "value=%d\n",*i);
1065                 break;
1066         }
1067         case VIDIOC_S_OUTPUT:
1068         {
1069                 unsigned int *i = arg;
1070
1071                 if (!vfd->vidioc_s_output)
1072                         break;
1073                 dbgarg (cmd, "value=%d\n",*i);
1074                 ret=vfd->vidioc_s_output(file, fh, *i);
1075                 break;
1076         }
1077
1078         /* --- controls ---------------------------------------------- */
1079         case VIDIOC_QUERYCTRL:
1080         {
1081                 struct v4l2_queryctrl *p=arg;
1082
1083                 if (!vfd->vidioc_queryctrl)
1084                         break;
1085                 ret=vfd->vidioc_queryctrl(file, fh, p);
1086
1087                 if (!ret)
1088                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1089                                         "min/max=%d/%d,"
1090                                         " step=%d, default=%d, flags=0x%08x\n",
1091                                         p->id,p->type,p->name,p->minimum,
1092                                         p->maximum,p->step,p->default_value,
1093                                         p->flags);
1094                 break;
1095         }
1096         case VIDIOC_G_CTRL:
1097         {
1098                 struct v4l2_control *p = arg;
1099
1100                 if (!vfd->vidioc_g_ctrl)
1101                         break;
1102                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1103
1104                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1105                 if (!ret)
1106                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1107                 break;
1108         }
1109         case VIDIOC_S_CTRL:
1110         {
1111                 struct v4l2_control *p = arg;
1112
1113                 if (!vfd->vidioc_s_ctrl)
1114                         break;
1115                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1116
1117                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1118                 break;
1119         }
1120         case VIDIOC_G_EXT_CTRLS:
1121         {
1122                 struct v4l2_ext_controls *p = arg;
1123
1124                 if (vfd->vidioc_g_ext_ctrls) {
1125                         dbgarg(cmd, "count=%d\n", p->count);
1126
1127                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1128                 }
1129                 break;
1130         }
1131         case VIDIOC_S_EXT_CTRLS:
1132         {
1133                 struct v4l2_ext_controls *p = arg;
1134
1135                 if (vfd->vidioc_s_ext_ctrls) {
1136                         dbgarg(cmd, "count=%d\n", p->count);
1137
1138                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1139                 }
1140                 break;
1141         }
1142         case VIDIOC_TRY_EXT_CTRLS:
1143         {
1144                 struct v4l2_ext_controls *p = arg;
1145
1146                 if (vfd->vidioc_try_ext_ctrls) {
1147                         dbgarg(cmd, "count=%d\n", p->count);
1148
1149                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1150                 }
1151                 break;
1152         }
1153         case VIDIOC_QUERYMENU:
1154         {
1155                 struct v4l2_querymenu *p=arg;
1156                 if (!vfd->vidioc_querymenu)
1157                         break;
1158                 ret=vfd->vidioc_querymenu(file, fh, p);
1159                 if (!ret)
1160                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1161                                                 p->id,p->index,p->name);
1162                 break;
1163         }
1164         /* --- audio ---------------------------------------------- */
1165         case VIDIOC_ENUMAUDIO:
1166         {
1167                 struct v4l2_audio *p=arg;
1168
1169                 if (!vfd->vidioc_enumaudio)
1170                         break;
1171                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1172                 ret=vfd->vidioc_enumaudio(file, fh, p);
1173                 if (!ret)
1174                         dbgarg2("index=%d, name=%s, capability=%d, "
1175                                         "mode=%d\n",p->index,p->name,
1176                                         p->capability, p->mode);
1177                 break;
1178         }
1179         case VIDIOC_G_AUDIO:
1180         {
1181                 struct v4l2_audio *p=arg;
1182                 __u32 index=p->index;
1183
1184                 if (!vfd->vidioc_g_audio)
1185                         break;
1186
1187                 memset(p,0,sizeof(*p));
1188                 p->index=index;
1189                 dbgarg(cmd, "Get for index=%d\n", p->index);
1190                 ret=vfd->vidioc_g_audio(file, fh, p);
1191                 if (!ret)
1192                         dbgarg2("index=%d, name=%s, capability=%d, "
1193                                         "mode=%d\n",p->index,
1194                                         p->name,p->capability, p->mode);
1195                 break;
1196         }
1197         case VIDIOC_S_AUDIO:
1198         {
1199                 struct v4l2_audio *p=arg;
1200
1201                 if (!vfd->vidioc_s_audio)
1202                         break;
1203                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1204                                         "mode=%d\n", p->index, p->name,
1205                                         p->capability, p->mode);
1206                 ret=vfd->vidioc_s_audio(file, fh, p);
1207                 break;
1208         }
1209         case VIDIOC_ENUMAUDOUT:
1210         {
1211                 struct v4l2_audioout *p=arg;
1212
1213                 if (!vfd->vidioc_enumaudout)
1214                         break;
1215                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1216                 ret=vfd->vidioc_enumaudout(file, fh, p);
1217                 if (!ret)
1218                         dbgarg2("index=%d, name=%s, capability=%d, "
1219                                         "mode=%d\n", p->index, p->name,
1220                                         p->capability,p->mode);
1221                 break;
1222         }
1223         case VIDIOC_G_AUDOUT:
1224         {
1225                 struct v4l2_audioout *p=arg;
1226
1227                 if (!vfd->vidioc_g_audout)
1228                         break;
1229                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1230                 ret=vfd->vidioc_g_audout(file, fh, p);
1231                 if (!ret)
1232                         dbgarg2("index=%d, name=%s, capability=%d, "
1233                                         "mode=%d\n", p->index, p->name,
1234                                         p->capability,p->mode);
1235                 break;
1236         }
1237         case VIDIOC_S_AUDOUT:
1238         {
1239                 struct v4l2_audioout *p=arg;
1240
1241                 if (!vfd->vidioc_s_audout)
1242                         break;
1243                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1244                                         "mode=%d\n", p->index, p->name,
1245                                         p->capability,p->mode);
1246
1247                 ret=vfd->vidioc_s_audout(file, fh, p);
1248                 break;
1249         }
1250         case VIDIOC_G_MODULATOR:
1251         {
1252                 struct v4l2_modulator *p=arg;
1253                 if (!vfd->vidioc_g_modulator)
1254                         break;
1255                 ret=vfd->vidioc_g_modulator(file, fh, p);
1256                 if (!ret)
1257                         dbgarg(cmd, "index=%d, name=%s, "
1258                                         "capability=%d, rangelow=%d,"
1259                                         " rangehigh=%d, txsubchans=%d\n",
1260                                         p->index, p->name,p->capability,
1261                                         p->rangelow, p->rangehigh,
1262                                         p->txsubchans);
1263                 break;
1264         }
1265         case VIDIOC_S_MODULATOR:
1266         {
1267                 struct v4l2_modulator *p=arg;
1268                 if (!vfd->vidioc_s_modulator)
1269                         break;
1270                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1271                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1272                                 p->index, p->name,p->capability,p->rangelow,
1273                                 p->rangehigh,p->txsubchans);
1274                         ret=vfd->vidioc_s_modulator(file, fh, p);
1275                 break;
1276         }
1277         case VIDIOC_G_CROP:
1278         {
1279                 struct v4l2_crop *p=arg;
1280                 if (!vfd->vidioc_g_crop)
1281                         break;
1282                 ret=vfd->vidioc_g_crop(file, fh, p);
1283                 if (!ret) {
1284                         dbgarg(cmd, "type=%d\n", p->type);
1285                         dbgrect(vfd, "", &p->c);
1286                 }
1287                 break;
1288         }
1289         case VIDIOC_S_CROP:
1290         {
1291                 struct v4l2_crop *p=arg;
1292                 if (!vfd->vidioc_s_crop)
1293                         break;
1294                 dbgarg(cmd, "type=%d\n", p->type);
1295                 dbgrect(vfd, "", &p->c);
1296                 ret=vfd->vidioc_s_crop(file, fh, p);
1297                 break;
1298         }
1299         case VIDIOC_CROPCAP:
1300         {
1301                 struct v4l2_cropcap *p=arg;
1302                 /*FIXME: Should also show v4l2_fract pixelaspect */
1303                 if (!vfd->vidioc_cropcap)
1304                         break;
1305                 dbgarg(cmd, "type=%d\n", p->type);
1306                 dbgrect(vfd, "bounds ", &p->bounds);
1307                 dbgrect(vfd, "defrect ", &p->defrect);
1308                 ret=vfd->vidioc_cropcap(file, fh, p);
1309                 break;
1310         }
1311         case VIDIOC_G_MPEGCOMP:
1312         {
1313                 struct v4l2_mpeg_compression *p=arg;
1314
1315                 /*FIXME: Several fields not shown */
1316                 if (!vfd->vidioc_g_mpegcomp)
1317                         break;
1318                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1319                 if (!ret)
1320                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1321                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1322                                         "ps_size=%d, au_sample_rate=%d, "
1323                                         "au_pesid=%c, vi_frame_rate=%d, "
1324                                         "vi_frames_per_gop=%d, "
1325                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1326                                         p->ts_pid_pmt,p->ts_pid_audio,
1327                                         p->ts_pid_video,p->ts_pid_pcr,
1328                                         p->ps_size, p->au_sample_rate,
1329                                         p->au_pesid, p->vi_frame_rate,
1330                                         p->vi_frames_per_gop,
1331                                         p->vi_bframes_count, p->vi_pesid);
1332                 break;
1333         }
1334         case VIDIOC_S_MPEGCOMP:
1335         {
1336                 struct v4l2_mpeg_compression *p=arg;
1337                 /*FIXME: Several fields not shown */
1338                 if (!vfd->vidioc_s_mpegcomp)
1339                         break;
1340                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1341                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1342                                 "au_sample_rate=%d, au_pesid=%c, "
1343                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1344                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1345                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1346                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1347                                 p->au_pesid, p->vi_frame_rate,
1348                                 p->vi_frames_per_gop, p->vi_bframes_count,
1349                                 p->vi_pesid);
1350                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1351                 break;
1352         }
1353         case VIDIOC_G_JPEGCOMP:
1354         {
1355                 struct v4l2_jpegcompression *p=arg;
1356                 if (!vfd->vidioc_g_jpegcomp)
1357                         break;
1358                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1359                 if (!ret)
1360                         dbgarg (cmd, "quality=%d, APPn=%d, "
1361                                                 "APP_len=%d, COM_len=%d, "
1362                                                 "jpeg_markers=%d\n",
1363                                                 p->quality,p->APPn,p->APP_len,
1364                                                 p->COM_len,p->jpeg_markers);
1365                 break;
1366         }
1367         case VIDIOC_S_JPEGCOMP:
1368         {
1369                 struct v4l2_jpegcompression *p=arg;
1370                 if (!vfd->vidioc_g_jpegcomp)
1371                         break;
1372                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1373                                         "COM_len=%d, jpeg_markers=%d\n",
1374                                         p->quality,p->APPn,p->APP_len,
1375                                         p->COM_len,p->jpeg_markers);
1376                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1377                 break;
1378         }
1379         case VIDIOC_G_ENC_INDEX:
1380         {
1381                 struct v4l2_enc_idx *p=arg;
1382
1383                 if (!vfd->vidioc_g_enc_index)
1384                         break;
1385                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1386                 if (!ret)
1387                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1388                                         p->entries,p->entries_cap);
1389                 break;
1390         }
1391         case VIDIOC_ENCODER_CMD:
1392         {
1393                 struct v4l2_encoder_cmd *p=arg;
1394
1395                 if (!vfd->vidioc_encoder_cmd)
1396                         break;
1397                 ret=vfd->vidioc_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_TRY_ENCODER_CMD:
1404         {
1405                 struct v4l2_encoder_cmd *p=arg;
1406
1407                 if (!vfd->vidioc_try_encoder_cmd)
1408                         break;
1409                 ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
1410                 if (!ret)
1411                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1412                                         p->cmd,p->flags);
1413                 break;
1414         }
1415         case VIDIOC_G_PARM:
1416         {
1417                 struct v4l2_streamparm *p=arg;
1418                 __u32 type=p->type;
1419
1420                 memset(p,0,sizeof(*p));
1421                 p->type=type;
1422
1423                 if (vfd->vidioc_g_parm) {
1424                         ret=vfd->vidioc_g_parm(file, fh, p);
1425                 } else {
1426                         struct v4l2_standard s;
1427
1428                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1429                                 return -EINVAL;
1430
1431                         v4l2_video_std_construct(&s, vfd->current_norm,
1432                                                  v4l2_norm_to_name(vfd->current_norm));
1433
1434                         p->parm.capture.timeperframe = s.frameperiod;
1435                         ret=0;
1436                 }
1437
1438                 dbgarg (cmd, "type=%d\n", p->type);
1439                 break;
1440         }
1441         case VIDIOC_S_PARM:
1442         {
1443                 struct v4l2_streamparm *p=arg;
1444                 if (!vfd->vidioc_s_parm)
1445                         break;
1446                 dbgarg (cmd, "type=%d\n", p->type);
1447                 ret=vfd->vidioc_s_parm(file, fh, p);
1448                 break;
1449         }
1450         case VIDIOC_G_TUNER:
1451         {
1452                 struct v4l2_tuner *p=arg;
1453                 __u32 index=p->index;
1454
1455                 if (!vfd->vidioc_g_tuner)
1456                         break;
1457
1458                 memset(p,0,sizeof(*p));
1459                 p->index=index;
1460
1461                 ret=vfd->vidioc_g_tuner(file, fh, p);
1462                 if (!ret)
1463                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1464                                         "capability=%d, rangelow=%d, "
1465                                         "rangehigh=%d, signal=%d, afc=%d, "
1466                                         "rxsubchans=%d, audmode=%d\n",
1467                                         p->index, p->name, p->type,
1468                                         p->capability, p->rangelow,
1469                                         p->rangehigh, p->rxsubchans,
1470                                         p->audmode, p->signal, p->afc);
1471                 break;
1472         }
1473         case VIDIOC_S_TUNER:
1474         {
1475                 struct v4l2_tuner *p=arg;
1476                 if (!vfd->vidioc_s_tuner)
1477                         break;
1478                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1479                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1480                                 "signal=%d, afc=%d, rxsubchans=%d, "
1481                                 "audmode=%d\n",p->index, p->name, p->type,
1482                                 p->capability, p->rangelow,p->rangehigh,
1483                                 p->rxsubchans, p->audmode, p->signal,
1484                                 p->afc);
1485                 ret=vfd->vidioc_s_tuner(file, fh, p);
1486                 break;
1487         }
1488         case VIDIOC_G_FREQUENCY:
1489         {
1490                 struct v4l2_frequency *p=arg;
1491                 if (!vfd->vidioc_g_frequency)
1492                         break;
1493
1494                 memset(p,0,sizeof(*p));
1495
1496                 ret=vfd->vidioc_g_frequency(file, fh, p);
1497                 if (!ret)
1498                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1499                                                 p->tuner,p->type,p->frequency);
1500                 break;
1501         }
1502         case VIDIOC_S_FREQUENCY:
1503         {
1504                 struct v4l2_frequency *p=arg;
1505                 if (!vfd->vidioc_s_frequency)
1506                         break;
1507                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1508                                 p->tuner,p->type,p->frequency);
1509                 ret=vfd->vidioc_s_frequency(file, fh, p);
1510                 break;
1511         }
1512         case VIDIOC_G_SLICED_VBI_CAP:
1513         {
1514                 struct v4l2_sliced_vbi_cap *p=arg;
1515                 if (!vfd->vidioc_g_sliced_vbi_cap)
1516                         break;
1517                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1518                 if (!ret)
1519                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1520                 break;
1521         }
1522         case VIDIOC_LOG_STATUS:
1523         {
1524                 if (!vfd->vidioc_log_status)
1525                         break;
1526                 ret=vfd->vidioc_log_status(file, fh);
1527                 break;
1528         }
1529 #ifdef CONFIG_VIDEO_ADV_DEBUG
1530         case VIDIOC_DBG_G_REGISTER:
1531         {
1532                 struct v4l2_register *p=arg;
1533                 if (!capable(CAP_SYS_ADMIN))
1534                         ret=-EPERM;
1535                 else if (vfd->vidioc_g_register)
1536                         ret=vfd->vidioc_g_register(file, fh, p);
1537                 break;
1538         }
1539         case VIDIOC_DBG_S_REGISTER:
1540         {
1541                 struct v4l2_register *p=arg;
1542                 if (!capable(CAP_SYS_ADMIN))
1543                         ret=-EPERM;
1544                 else if (vfd->vidioc_s_register)
1545                         ret=vfd->vidioc_s_register(file, fh, p);
1546                 break;
1547         }
1548 #endif
1549         case VIDIOC_G_CHIP_IDENT:
1550         {
1551                 struct v4l2_chip_ident *p=arg;
1552                 if (!vfd->vidioc_g_chip_ident)
1553                         break;
1554                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1555                 if (!ret)
1556                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1557                 break;
1558         }
1559         } /* switch */
1560
1561         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1562                 if (ret<0) {
1563                         printk ("%s: err:\n", vfd->name);
1564                         v4l_print_ioctl(vfd->name, cmd);
1565                 }
1566         }
1567
1568         return ret;
1569 }
1570
1571 int video_ioctl2 (struct inode *inode, struct file *file,
1572                unsigned int cmd, unsigned long arg)
1573 {
1574         char    sbuf[128];
1575         void    *mbuf = NULL;
1576         void    *parg = NULL;
1577         int     err  = -EINVAL;
1578         int     is_ext_ctrl;
1579         size_t  ctrls_size = 0;
1580         void __user *user_ptr = NULL;
1581
1582 #ifdef __OLD_VIDIOC_
1583         cmd = video_fix_command(cmd);
1584 #endif
1585         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1586                        cmd == VIDIOC_TRY_EXT_CTRLS);
1587
1588         /*  Copy arguments into temp kernel buffer  */
1589         switch (_IOC_DIR(cmd)) {
1590         case _IOC_NONE:
1591                 parg = NULL;
1592                 break;
1593         case _IOC_READ:
1594         case _IOC_WRITE:
1595         case (_IOC_WRITE | _IOC_READ):
1596                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1597                         parg = sbuf;
1598                 } else {
1599                         /* too big to allocate from stack */
1600                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1601                         if (NULL == mbuf)
1602                                 return -ENOMEM;
1603                         parg = mbuf;
1604                 }
1605
1606                 err = -EFAULT;
1607                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1608                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1609                                 goto out;
1610                 break;
1611         }
1612
1613         if (is_ext_ctrl) {
1614                 struct v4l2_ext_controls *p = parg;
1615
1616                 /* In case of an error, tell the caller that it wasn't
1617                    a specific control that caused it. */
1618                 p->error_idx = p->count;
1619                 user_ptr = (void __user *)p->controls;
1620                 if (p->count) {
1621                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1622                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1623                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1624                         err = -ENOMEM;
1625                         if (NULL == mbuf)
1626                                 goto out_ext_ctrl;
1627                         err = -EFAULT;
1628                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1629                                 goto out_ext_ctrl;
1630                         p->controls = mbuf;
1631                 }
1632         }
1633
1634         /* Handles IOCTL */
1635         err = __video_do_ioctl(inode, file, cmd, parg);
1636         if (err == -ENOIOCTLCMD)
1637                 err = -EINVAL;
1638         if (is_ext_ctrl) {
1639                 struct v4l2_ext_controls *p = parg;
1640
1641                 p->controls = (void *)user_ptr;
1642                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1643                         err = -EFAULT;
1644                 goto out_ext_ctrl;
1645         }
1646         if (err < 0)
1647                 goto out;
1648
1649 out_ext_ctrl:
1650         /*  Copy results into user buffer  */
1651         switch (_IOC_DIR(cmd))
1652         {
1653         case _IOC_READ:
1654         case (_IOC_WRITE | _IOC_READ):
1655                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1656                         err = -EFAULT;
1657                 break;
1658         }
1659
1660 out:
1661         kfree(mbuf);
1662         return err;
1663 }
1664
1665
1666 static const struct file_operations video_fops;
1667
1668 /**
1669  *      video_register_device - register video4linux devices
1670  *      @vfd:  video device structure we want to register
1671  *      @type: type of device to register
1672  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1673  *             -1 == first free)
1674  *
1675  *      The registration code assigns minor numbers based on the type
1676  *      requested. -ENFILE is returned in all the device slots for this
1677  *      category are full. If not then the minor field is set and the
1678  *      driver initialize function is called (if non %NULL).
1679  *
1680  *      Zero is returned on success.
1681  *
1682  *      Valid types are
1683  *
1684  *      %VFL_TYPE_GRABBER - A frame grabber
1685  *
1686  *      %VFL_TYPE_VTX - A teletext device
1687  *
1688  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1689  *
1690  *      %VFL_TYPE_RADIO - A radio card
1691  */
1692
1693 int video_register_device(struct video_device *vfd, int type, int nr)
1694 {
1695         int i=0;
1696         int base;
1697         int end;
1698         int ret;
1699         char *name_base;
1700
1701         switch(type)
1702         {
1703                 case VFL_TYPE_GRABBER:
1704                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1705                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1706                         name_base = "video";
1707                         break;
1708                 case VFL_TYPE_VTX:
1709                         base=MINOR_VFL_TYPE_VTX_MIN;
1710                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1711                         name_base = "vtx";
1712                         break;
1713                 case VFL_TYPE_VBI:
1714                         base=MINOR_VFL_TYPE_VBI_MIN;
1715                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1716                         name_base = "vbi";
1717                         break;
1718                 case VFL_TYPE_RADIO:
1719                         base=MINOR_VFL_TYPE_RADIO_MIN;
1720                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1721                         name_base = "radio";
1722                         break;
1723                 default:
1724                         printk(KERN_ERR "%s called with unknown type: %d\n",
1725                                __FUNCTION__, type);
1726                         return -1;
1727         }
1728
1729         /* pick a minor number */
1730         mutex_lock(&videodev_lock);
1731         if (nr >= 0  &&  nr < end-base) {
1732                 /* use the one the driver asked for */
1733                 i = base+nr;
1734                 if (NULL != video_device[i]) {
1735                         mutex_unlock(&videodev_lock);
1736                         return -ENFILE;
1737                 }
1738         } else {
1739                 /* use first free */
1740                 for(i=base;i<end;i++)
1741                         if (NULL == video_device[i])
1742                                 break;
1743                 if (i == end) {
1744                         mutex_unlock(&videodev_lock);
1745                         return -ENFILE;
1746                 }
1747         }
1748         video_device[i]=vfd;
1749         vfd->minor=i;
1750         mutex_unlock(&videodev_lock);
1751         mutex_init(&vfd->lock);
1752
1753         /* sysfs class */
1754         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1755         if (vfd->dev)
1756                 vfd->class_dev.dev = vfd->dev;
1757         vfd->class_dev.class       = &video_class;
1758         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1759         sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
1760         ret = class_device_register(&vfd->class_dev);
1761         if (ret < 0) {
1762                 printk(KERN_ERR "%s: class_device_register failed\n",
1763                        __FUNCTION__);
1764                 goto fail_minor;
1765         }
1766         ret = class_device_create_file(&vfd->class_dev, &class_device_attr_name);
1767         if (ret < 0) {
1768                 printk(KERN_ERR "%s: class_device_create_file 'name' failed\n",
1769                        __FUNCTION__);
1770                 goto fail_classdev;
1771         }
1772
1773 #if 1
1774         /* needed until all drivers are fixed */
1775         if (!vfd->release)
1776                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1777                        "Please fix your driver for proper sysfs support, see "
1778                        "http://lwn.net/Articles/36850/\n", vfd->name);
1779 #endif
1780         return 0;
1781
1782 fail_classdev:
1783         class_device_unregister(&vfd->class_dev);
1784 fail_minor:
1785         mutex_lock(&videodev_lock);
1786         video_device[vfd->minor] = NULL;
1787         vfd->minor = -1;
1788         mutex_unlock(&videodev_lock);
1789         return ret;
1790 }
1791
1792 /**
1793  *      video_unregister_device - unregister a video4linux device
1794  *      @vfd: the device to unregister
1795  *
1796  *      This unregisters the passed device and deassigns the minor
1797  *      number. Future open calls will be met with errors.
1798  */
1799
1800 void video_unregister_device(struct video_device *vfd)
1801 {
1802         mutex_lock(&videodev_lock);
1803         if(video_device[vfd->minor]!=vfd)
1804                 panic("videodev: bad unregister");
1805
1806         video_device[vfd->minor]=NULL;
1807         class_device_unregister(&vfd->class_dev);
1808         mutex_unlock(&videodev_lock);
1809 }
1810
1811 /*
1812  * Video fs operations
1813  */
1814 static const struct file_operations video_fops=
1815 {
1816         .owner          = THIS_MODULE,
1817         .llseek         = no_llseek,
1818         .open           = video_open,
1819 };
1820
1821 /*
1822  *      Initialise video for linux
1823  */
1824
1825 static int __init videodev_init(void)
1826 {
1827         int ret;
1828
1829         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1830         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1831                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1832                 return -EIO;
1833         }
1834
1835         ret = class_register(&video_class);
1836         if (ret < 0) {
1837                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1838                 printk(KERN_WARNING "video_dev: class_register failed\n");
1839                 return -EIO;
1840         }
1841
1842         return 0;
1843 }
1844
1845 static void __exit videodev_exit(void)
1846 {
1847         class_unregister(&video_class);
1848         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1849 }
1850
1851 module_init(videodev_init)
1852 module_exit(videodev_exit)
1853
1854 EXPORT_SYMBOL(video_register_device);
1855 EXPORT_SYMBOL(video_unregister_device);
1856 EXPORT_SYMBOL(video_devdata);
1857 EXPORT_SYMBOL(video_usercopy);
1858 EXPORT_SYMBOL(video_exclusive_open);
1859 EXPORT_SYMBOL(video_exclusive_release);
1860 EXPORT_SYMBOL(video_ioctl2);
1861 EXPORT_SYMBOL(video_device_alloc);
1862 EXPORT_SYMBOL(video_device_release);
1863
1864 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1865 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1866 MODULE_LICENSE("GPL");
1867
1868
1869 /*
1870  * Local variables:
1871  * c-basic-offset: 8
1872  * End:
1873  */