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/sched.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/mm.h>
  36 #include <linux/string.h>
  37 #include <linux/errno.h>
  38 #include <linux/init.h>
  39 #include <linux/kmod.h>
  40 #include <linux/slab.h>
  41 #include <asm/uaccess.h>
  42 #include <asm/system.h>
  43
  44 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
  45 #include <linux/videodev2.h>
  46
  47 #ifdef CONFIG_VIDEO_V4L1
  48 #include <linux/videodev.h>
  49 #endif
  50 #include <media/v4l2-common.h>
  51
  52 #define VIDEO_NUM_DEVICES       256
  53 #define VIDEO_NAME              "video4linux"
  54
  55 /*
  56  *      sysfs stuff
  57  */
  58
  59 static ssize_t show_name(struct class_device *cd, char *buf)
  60 {
  61         struct video_device *vfd = container_of(cd, struct video_device,
  62                                                                 class_dev);
  63         return sprintf(buf,"%.*s\n",(int)sizeof(vfd->name),vfd->name);
  64 }
  65
  66 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  67
  68 struct video_device *video_device_alloc(void)
  69 {
  70         struct video_device *vfd;
  71
  72         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
  73         return vfd;
  74 }
  75
  76 void video_device_release(struct video_device *vfd)
  77 {
  78         kfree(vfd);
  79 }
  80
  81 static void video_release(struct class_device *cd)
  82 {
  83         struct video_device *vfd = container_of(cd, struct video_device,
  84                                                                 class_dev);
  85
  86 #if 1
  87         /* needed until all drivers are fixed */
  88         if (!vfd->release)
  89                 return;
  90 #endif
  91         vfd->release(vfd);
  92 }
  93
  94 static struct class video_class = {
  95         .name    = VIDEO_NAME,
  96         .release = video_release,
  97 };
  98
  99 /*
 100  *      Active devices
 101  */
 102
 103 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 104 static DEFINE_MUTEX(videodev_lock);
 105
 106 struct video_device* video_devdata(struct file *file)
 107 {
 108         return video_device[iminor(file->f_path.dentry->d_inode)];
 109 }
 110
 111 /*
 112  *      Open a video device - FIXME: Obsoleted
 113  */
 114 static int video_open(struct inode *inode, struct file *file)
 115 {
 116         unsigned int minor = iminor(inode);
 117         int err = 0;
 118         struct video_device *vfl;
 119         const struct file_operations *old_fops;
 120
 121         if(minor>=VIDEO_NUM_DEVICES)
 122                 return -ENODEV;
 123         mutex_lock(&videodev_lock);
 124         vfl=video_device[minor];
 125         if(vfl==NULL) {
 126                 mutex_unlock(&videodev_lock);
 127                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 128                 mutex_lock(&videodev_lock);
 129                 vfl=video_device[minor];
 130                 if (vfl==NULL) {
 131                         mutex_unlock(&videodev_lock);
 132                         return -ENODEV;
 133                 }
 134         }
 135         old_fops = file->f_op;
 136         file->f_op = fops_get(vfl->fops);
 137         if(file->f_op->open)
 138                 err = file->f_op->open(inode,file);
 139         if (err) {
 140                 fops_put(file->f_op);
 141                 file->f_op = fops_get(old_fops);
 142         }
 143         fops_put(old_fops);
 144         mutex_unlock(&videodev_lock);
 145         return err;
 146 }
 147
 148 /*
 149  * helper function -- handles userspace copying for ioctl arguments
 150  */
 151
 152 #ifdef __OLD_VIDIOC_
 153 static unsigned int
 154 video_fix_command(unsigned int cmd)
 155 {
 156         switch (cmd) {
 157         case VIDIOC_OVERLAY_OLD:
 158                 cmd = VIDIOC_OVERLAY;
 159                 break;
 160         case VIDIOC_S_PARM_OLD:
 161                 cmd = VIDIOC_S_PARM;
 162                 break;
 163         case VIDIOC_S_CTRL_OLD:
 164                 cmd = VIDIOC_S_CTRL;
 165                 break;
 166         case VIDIOC_G_AUDIO_OLD:
 167                 cmd = VIDIOC_G_AUDIO;
 168                 break;
 169         case VIDIOC_G_AUDOUT_OLD:
 170                 cmd = VIDIOC_G_AUDOUT;
 171                 break;
 172         case VIDIOC_CROPCAP_OLD:
 173                 cmd = VIDIOC_CROPCAP;
 174                 break;
 175         }
 176         return cmd;
 177 }
 178 #endif
 179
 180 /*
 181  * Obsolete usercopy function - Should be removed soon
 182  */
 183 int
 184 video_usercopy(struct inode *inode, struct file *file,
 185                unsigned int cmd, unsigned long arg,
 186                int (*func)(struct inode *inode, struct file *file,
 187                            unsigned int cmd, void *arg))
 188 {
 189         char    sbuf[128];
 190         void    *mbuf = NULL;
 191         void    *parg = NULL;
 192         int     err  = -EINVAL;
 193         int     is_ext_ctrl;
 194         size_t  ctrls_size = 0;
 195         void __user *user_ptr = NULL;
 196
 197 #ifdef __OLD_VIDIOC_
 198         cmd = video_fix_command(cmd);
 199 #endif
 200         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 201                        cmd == VIDIOC_TRY_EXT_CTRLS);
 202
 203         /*  Copy arguments into temp kernel buffer  */
 204         switch (_IOC_DIR(cmd)) {
 205         case _IOC_NONE:
 206                 parg = NULL;
 207                 break;
 208         case _IOC_READ:
 209         case _IOC_WRITE:
 210         case (_IOC_WRITE | _IOC_READ):
 211                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 212                         parg = sbuf;
 213                 } else {
 214                         /* too big to allocate from stack */
 215                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 216                         if (NULL == mbuf)
 217                                 return -ENOMEM;
 218                         parg = mbuf;
 219                 }
 220
 221                 err = -EFAULT;
 222                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 223                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 224                                 goto out;
 225                 break;
 226         }
 227         if (is_ext_ctrl) {
 228                 struct v4l2_ext_controls *p = parg;
 229
 230                 /* In case of an error, tell the caller that it wasn't
 231                    a specific control that caused it. */
 232                 p->error_idx = p->count;
 233                 user_ptr = (void __user *)p->controls;
 234                 if (p->count) {
 235                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 236                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 237                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 238                         err = -ENOMEM;
 239                         if (NULL == mbuf)
 240                                 goto out_ext_ctrl;
 241                         err = -EFAULT;
 242                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 243                                 goto out_ext_ctrl;
 244                         p->controls = mbuf;
 245                 }
 246         }
 247
 248         /* call driver */
 249         err = func(inode, file, cmd, parg);
 250         if (err == -ENOIOCTLCMD)
 251                 err = -EINVAL;
 252         if (is_ext_ctrl) {
 253                 struct v4l2_ext_controls *p = parg;
 254
 255                 p->controls = (void *)user_ptr;
 256                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 257                         err = -EFAULT;
 258                 goto out_ext_ctrl;
 259         }
 260         if (err < 0)
 261                 goto out;
 262
 263 out_ext_ctrl:
 264         /*  Copy results into user buffer  */
 265         switch (_IOC_DIR(cmd))
 266         {
 267         case _IOC_READ:
 268         case (_IOC_WRITE | _IOC_READ):
 269                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 270                         err = -EFAULT;
 271                 break;
 272         }
 273
 274 out:
 275         kfree(mbuf);
 276         return err;
 277 }
 278
 279 /*
 280  * open/release helper functions -- handle exclusive opens
 281  * Should be removed soon
 282  */
 283 int video_exclusive_open(struct inode *inode, struct file *file)
 284 {
 285         struct  video_device *vfl = video_devdata(file);
 286         int retval = 0;
 287
 288         mutex_lock(&vfl->lock);
 289         if (vfl->users) {
 290                 retval = -EBUSY;
 291         } else {
 292                 vfl->users++;
 293         }
 294         mutex_unlock(&vfl->lock);
 295         return retval;
 296 }
 297
 298 int video_exclusive_release(struct inode *inode, struct file *file)
 299 {
 300         struct  video_device *vfl = video_devdata(file);
 301
 302         vfl->users--;
 303         return 0;
 304 }
 305
 306 static char *v4l2_memory_names[] = {
 307         [V4L2_MEMORY_MMAP]    = "mmap",
 308         [V4L2_MEMORY_USERPTR] = "userptr",
 309         [V4L2_MEMORY_OVERLAY] = "overlay",
 310 };
 311
 312
 313 /* FIXME: Those stuff are replicated also on v4l2-common.c */
 314 static char *v4l2_type_names_FIXME[] = {
 315         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
 316         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
 317         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
 318         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 319         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 320         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 321         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
 322         [V4L2_BUF_TYPE_PRIVATE]            = "private",
 323 };
 324
 325 static char *v4l2_field_names_FIXME[] = {
 326         [V4L2_FIELD_ANY]        = "any",
 327         [V4L2_FIELD_NONE]       = "none",
 328         [V4L2_FIELD_TOP]        = "top",
 329         [V4L2_FIELD_BOTTOM]     = "bottom",
 330         [V4L2_FIELD_INTERLACED] = "interlaced",
 331         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 332         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 333         [V4L2_FIELD_ALTERNATE]  = "alternate",
 334 };
 335
 336 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
 337
 338 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 339                                         struct v4l2_buffer *p)
 340 {
 341         struct v4l2_timecode *tc=&p->timecode;
 342
 343         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 344                 "bytesused=%d, flags=0x%08d, "
 345                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx\n",
 346                         (p->timestamp.tv_sec/3600),
 347                         (int)(p->timestamp.tv_sec/60)%60,
 348                         (int)(p->timestamp.tv_sec%60),
 349                         p->timestamp.tv_usec,
 350                         p->index,
 351                         prt_names(p->type,v4l2_type_names_FIXME),
 352                         p->bytesused,p->flags,
 353                         p->field,p->sequence,
 354                         prt_names(p->memory,v4l2_memory_names),
 355                         p->m.userptr);
 356         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
 357                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 358                         tc->hours,tc->minutes,tc->seconds,
 359                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 360 }
 361
 362 static inline void dbgrect(struct video_device *vfd, char *s,
 363                                                         struct v4l2_rect *r)
 364 {
 365         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
 366                                                 r->width, r->height);
 367 };
 368
 369 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 370                                                 struct v4l2_pix_format *fmt)
 371 {
 372         dbgarg2 ("width=%d, height=%d, format=0x%08x, field=%s, "
 373                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 374                 fmt->width,fmt->height,fmt->pixelformat,
 375                 prt_names(fmt->field,v4l2_field_names_FIXME),
 376                 fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
 377 };
 378
 379
 380 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 381 {
 382         switch (type) {
 383         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 384                 if (vfd->vidioc_try_fmt_cap)
 385                         return (0);
 386                 break;
 387         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 388                 if (vfd->vidioc_try_fmt_overlay)
 389                         return (0);
 390                 break;
 391         case V4L2_BUF_TYPE_VBI_CAPTURE:
 392                 if (vfd->vidioc_try_fmt_vbi)
 393                         return (0);
 394                 break;
 395         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 396                 if (vfd->vidioc_try_fmt_vbi_output)
 397                         return (0);
 398                 break;
 399         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 400                 if (vfd->vidioc_try_fmt_vbi_capture)
 401                         return (0);
 402                 break;
 403         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 404                 if (vfd->vidioc_try_fmt_video_output)
 405                         return (0);
 406                 break;
 407         case V4L2_BUF_TYPE_VBI_OUTPUT:
 408                 if (vfd->vidioc_try_fmt_vbi_output)
 409                         return (0);
 410                 break;
 411         case V4L2_BUF_TYPE_PRIVATE:
 412                 if (vfd->vidioc_try_fmt_type_private)
 413                         return (0);
 414                 break;
 415         }
 416         return (-EINVAL);
 417 }
 418
 419 static int __video_do_ioctl(struct inode *inode, struct file *file,
 420                 unsigned int cmd, void *arg)
 421 {
 422         struct video_device *vfd = video_devdata(file);
 423         void                 *fh = file->private_data;
 424         int                  ret = -EINVAL;
 425
 426         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 427                                 !(vfd->debug | V4L2_DEBUG_IOCTL_ARG)) {
 428                 v4l_print_ioctl(vfd->name, cmd);
 429         }
 430
 431         switch(cmd) {
 432         /* --- capabilities ------------------------------------------ */
 433         case VIDIOC_QUERYCAP:
 434         {
 435                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 436                 memset(cap, 0, sizeof(*cap));
 437
 438                 if (!vfd->vidioc_querycap)
 439                         break;
 440
 441                 ret=vfd->vidioc_querycap(file, fh, cap);
 442                 if (!ret)
 443                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 444                                         "version=0x%08x, "
 445                                         "capabilities=0x%08x\n",
 446                                         cap->driver,cap->card,cap->bus_info,
 447                                         cap->version,
 448                                         cap->capabilities);
 449                 break;
 450         }
 451
 452         /* --- priority ------------------------------------------ */
 453         case VIDIOC_G_PRIORITY:
 454         {
 455                 enum v4l2_priority *p=arg;
 456
 457                 if (!vfd->vidioc_g_priority)
 458                         break;
 459                 ret=vfd->vidioc_g_priority(file, fh, p);
 460                 if (!ret)
 461                         dbgarg(cmd, "priority is %d\n", *p);
 462                 break;
 463         }
 464         case VIDIOC_S_PRIORITY:
 465         {
 466                 enum v4l2_priority *p=arg;
 467
 468                 if (!vfd->vidioc_s_priority)
 469                         break;
 470                 dbgarg(cmd, "setting priority to %d\n", *p);
 471                 ret=vfd->vidioc_s_priority(file, fh, *p);
 472                 break;
 473         }
 474
 475         /* --- capture ioctls ---------------------------------------- */
 476         case VIDIOC_ENUM_FMT:
 477         {
 478                 struct v4l2_fmtdesc *f = arg;
 479                 enum v4l2_buf_type type;
 480                 unsigned int index;
 481
 482                 index = f->index;
 483                 type  = f->type;
 484                 memset(f,0,sizeof(*f));
 485                 f->index = index;
 486                 f->type  = type;
 487
 488                 switch (type) {
 489                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 490                         if (vfd->vidioc_enum_fmt_cap)
 491                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 492                         break;
 493                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 494                         if (vfd->vidioc_enum_fmt_overlay)
 495                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 496                         break;
 497                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 498                         if (vfd->vidioc_enum_fmt_vbi)
 499                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 500                         break;
 501                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 502                         if (vfd->vidioc_enum_fmt_vbi_output)
 503                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 504                                                                 fh, f);
 505                         break;
 506                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 507                         if (vfd->vidioc_enum_fmt_vbi_capture)
 508                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 509                                                                 fh, f);
 510                         break;
 511                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 512                         if (vfd->vidioc_enum_fmt_video_output)
 513                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 514                                                                 fh, f);
 515                         break;
 516                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 517                         if (vfd->vidioc_enum_fmt_vbi_output)
 518                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 519                                                                 fh, f);
 520                         break;
 521                 case V4L2_BUF_TYPE_PRIVATE:
 522                         if (vfd->vidioc_enum_fmt_type_private)
 523                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 524                                                                 fh, f);
 525                         break;
 526                 }
 527                 if (!ret)
 528                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 529                                         "description=%s,"
 530                                         " pixelformat=0x%8x\n",
 531                                         f->index, f->type, f->flags,
 532                                         f->description,
 533                                         f->pixelformat);
 534
 535                 break;
 536         }
 537         case VIDIOC_G_FMT:
 538         {
 539                 struct v4l2_format *f = (struct v4l2_format *)arg;
 540                 enum v4l2_buf_type type=f->type;
 541
 542                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 543                 f->type=type;
 544
 545                 /* FIXME: Should be one dump per type */
 546                 dbgarg (cmd, "type=%s\n", prt_names(type,
 547                                         v4l2_type_names_FIXME));
 548
 549                 switch (type) {
 550                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 551                         if (vfd->vidioc_g_fmt_cap)
 552                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 553                         if (!ret)
 554                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 555                         break;
 556                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 557                         if (vfd->vidioc_g_fmt_overlay)
 558                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 559                         break;
 560                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 561                         if (vfd->vidioc_g_fmt_vbi)
 562                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 563                         break;
 564                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 565                         if (vfd->vidioc_g_fmt_vbi_output)
 566                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 567                         break;
 568                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 569                         if (vfd->vidioc_g_fmt_vbi_capture)
 570                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 571                         break;
 572                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 573                         if (vfd->vidioc_g_fmt_video_output)
 574                                 ret=vfd->vidioc_g_fmt_video_output(file,
 575                                                                 fh, f);
 576                         break;
 577                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 578                         if (vfd->vidioc_g_fmt_vbi_output)
 579                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 580                         break;
 581                 case V4L2_BUF_TYPE_PRIVATE:
 582                         if (vfd->vidioc_g_fmt_type_private)
 583                                 ret=vfd->vidioc_g_fmt_type_private(file,
 584                                                                 fh, f);
 585                         break;
 586                 }
 587
 588                 break;
 589         }
 590         case VIDIOC_S_FMT:
 591         {
 592                 struct v4l2_format *f = (struct v4l2_format *)arg;
 593
 594                 /* FIXME: Should be one dump per type */
 595                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 596                                         v4l2_type_names_FIXME));
 597
 598                 switch (f->type) {
 599                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 600                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 601                         if (vfd->vidioc_s_fmt_cap)
 602                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 603                         break;
 604                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 605                         if (vfd->vidioc_s_fmt_overlay)
 606                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 607                         break;
 608                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 609                         if (vfd->vidioc_s_fmt_vbi)
 610                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 611                         break;
 612                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 613                         if (vfd->vidioc_s_fmt_vbi_output)
 614                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 615                         break;
 616                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 617                         if (vfd->vidioc_s_fmt_vbi_capture)
 618                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 619                         break;
 620                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 621                         if (vfd->vidioc_s_fmt_video_output)
 622                                 ret=vfd->vidioc_s_fmt_video_output(file,
 623                                                                 fh, f);
 624                         break;
 625                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 626                         if (vfd->vidioc_s_fmt_vbi_output)
 627                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 628                                                                 fh, f);
 629                         break;
 630                 case V4L2_BUF_TYPE_PRIVATE:
 631                         if (vfd->vidioc_s_fmt_type_private)
 632                                 ret=vfd->vidioc_s_fmt_type_private(file,
 633                                                                 fh, f);
 634                         break;
 635                 }
 636                 break;
 637         }
 638         case VIDIOC_TRY_FMT:
 639         {
 640                 struct v4l2_format *f = (struct v4l2_format *)arg;
 641
 642                 /* FIXME: Should be one dump per type */
 643                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 644                                                 v4l2_type_names_FIXME));
 645                 switch (f->type) {
 646                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 647                         if (vfd->vidioc_try_fmt_cap)
 648                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 649                         if (!ret)
 650                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 651                         break;
 652                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 653                         if (vfd->vidioc_try_fmt_overlay)
 654                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 655                         break;
 656                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 657                         if (vfd->vidioc_try_fmt_vbi)
 658                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 659                         break;
 660                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 661                         if (vfd->vidioc_try_fmt_vbi_output)
 662                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 663                                                                 fh, f);
 664                         break;
 665                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 666                         if (vfd->vidioc_try_fmt_vbi_capture)
 667                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 668                                                                 fh, f);
 669                         break;
 670                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 671                         if (vfd->vidioc_try_fmt_video_output)
 672                                 ret=vfd->vidioc_try_fmt_video_output(file,
 673                                                                 fh, f);
 674                         break;
 675                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 676                         if (vfd->vidioc_try_fmt_vbi_output)
 677                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 678                                                                 fh, f);
 679                         break;
 680                 case V4L2_BUF_TYPE_PRIVATE:
 681                         if (vfd->vidioc_try_fmt_type_private)
 682                                 ret=vfd->vidioc_try_fmt_type_private(file,
 683                                                                 fh, f);
 684                         break;
 685                 }
 686
 687                 break;
 688         }
 689         /* FIXME: Those buf reqs could be handled here,
 690            with some changes on videobuf to allow its header to be included at
 691            videodev2.h or being merged at videodev2.
 692          */
 693         case VIDIOC_REQBUFS:
 694         {
 695                 struct v4l2_requestbuffers *p=arg;
 696
 697                 if (!vfd->vidioc_reqbufs)
 698                         break;
 699                 ret = check_fmt (vfd, p->type);
 700                 if (ret)
 701                         break;
 702
 703                 ret=vfd->vidioc_reqbufs(file, fh, p);
 704                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 705                                 p->count,
 706                                 prt_names(p->type,v4l2_type_names_FIXME),
 707                                 prt_names(p->memory,v4l2_memory_names));
 708                 break;
 709         }
 710         case VIDIOC_QUERYBUF:
 711         {
 712                 struct v4l2_buffer *p=arg;
 713
 714                 if (!vfd->vidioc_querybuf)
 715                         break;
 716                 ret = check_fmt (vfd, p->type);
 717                 if (ret)
 718                         break;
 719
 720                 ret=vfd->vidioc_querybuf(file, fh, p);
 721                 if (!ret)
 722                         dbgbuf(cmd,vfd,p);
 723                 break;
 724         }
 725         case VIDIOC_QBUF:
 726         {
 727                 struct v4l2_buffer *p=arg;
 728
 729                 if (!vfd->vidioc_qbuf)
 730                         break;
 731                 ret = check_fmt (vfd, p->type);
 732                 if (ret)
 733                         break;
 734
 735                 ret=vfd->vidioc_qbuf(file, fh, p);
 736                 if (!ret)
 737                         dbgbuf(cmd,vfd,p);
 738                 break;
 739         }
 740         case VIDIOC_DQBUF:
 741         {
 742                 struct v4l2_buffer *p=arg;
 743                 if (!vfd->vidioc_dqbuf)
 744                         break;
 745                 ret = check_fmt (vfd, p->type);
 746                 if (ret)
 747                         break;
 748
 749                 ret=vfd->vidioc_dqbuf(file, fh, p);
 750                 if (!ret)
 751                         dbgbuf(cmd,vfd,p);
 752                 break;
 753         }
 754         case VIDIOC_OVERLAY:
 755         {
 756                 int *i = arg;
 757
 758                 if (!vfd->vidioc_overlay)
 759                         break;
 760                 dbgarg (cmd, "value=%d\n",*i);
 761                 ret=vfd->vidioc_overlay(file, fh, *i);
 762                 break;
 763         }
 764 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 765         /* --- streaming capture ------------------------------------- */
 766         case VIDIOCGMBUF:
 767         {
 768                 struct video_mbuf *p=arg;
 769
 770                 memset(p,0,sizeof(p));
 771
 772                 if (!vfd->vidiocgmbuf)
 773                         break;
 774                 ret=vfd->vidiocgmbuf(file, fh, p);
 775                 if (!ret)
 776                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 777                                                 p->size, p->frames,
 778                                                 (unsigned long)p->offsets);
 779                 break;
 780         }
 781 #endif
 782         case VIDIOC_G_FBUF:
 783         {
 784                 struct v4l2_framebuffer *p=arg;
 785                 if (!vfd->vidioc_g_fbuf)
 786                         break;
 787                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 788                 if (!ret) {
 789                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 790                                         p->capability,p->flags,
 791                                         (unsigned long)p->base);
 792                         v4l_print_pix_fmt (vfd, &p->fmt);
 793                 }
 794                 break;
 795         }
 796         case VIDIOC_S_FBUF:
 797         {
 798                 struct v4l2_framebuffer *p=arg;
 799                 if (!vfd->vidioc_s_fbuf)
 800                         break;
 801
 802                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 803                                 p->capability,p->flags,(unsigned long)p->base);
 804                 v4l_print_pix_fmt (vfd, &p->fmt);
 805                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 806
 807                 break;
 808         }
 809         case VIDIOC_STREAMON:
 810         {
 811                 enum v4l2_buf_type i = *(int *)arg;
 812                 if (!vfd->vidioc_streamon)
 813                         break;
 814                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 815                 ret=vfd->vidioc_streamon(file, fh,i);
 816                 break;
 817         }
 818         case VIDIOC_STREAMOFF:
 819         {
 820                 enum v4l2_buf_type i = *(int *)arg;
 821
 822                 if (!vfd->vidioc_streamoff)
 823                         break;
 824                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 825                 ret=vfd->vidioc_streamoff(file, fh, i);
 826                 break;
 827         }
 828         /* ---------- tv norms ---------- */
 829         case VIDIOC_ENUMSTD:
 830         {
 831                 struct v4l2_standard *p = arg;
 832                 unsigned int index = p->index;
 833
 834                 if (!vfd->tvnormsize) {
 835                         printk (KERN_WARNING "%s: no TV norms defined!\n",
 836                                                 vfd->name);
 837                         break;
 838                 }
 839
 840                 if (index<0 || index >= vfd->tvnormsize) {
 841                         ret=-EINVAL;
 842                         break;
 843                 }
 844                 v4l2_video_std_construct(p, vfd->tvnorms[p->index].id,
 845                                          vfd->tvnorms[p->index].name);
 846                 p->index = index;
 847
 848                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 849                                 "framelines=%d\n", p->index,
 850                                 (unsigned long long)p->id, p->name,
 851                                 p->frameperiod.numerator,
 852                                 p->frameperiod.denominator,
 853                                 p->framelines);
 854
 855                 ret=0;
 856                 break;
 857         }
 858         case VIDIOC_G_STD:
 859         {
 860                 v4l2_std_id *id = arg;
 861
 862                 *id = vfd->current_norm;
 863
 864                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 865
 866                 ret=0;
 867                 break;
 868         }
 869         case VIDIOC_S_STD:
 870         {
 871                 v4l2_std_id *id = arg;
 872                 unsigned int i;
 873
 874                 if (!vfd->tvnormsize) {
 875                         printk (KERN_WARNING "%s: no TV norms defined!\n",
 876                                                 vfd->name);
 877                         break;
 878                 }
 879
 880                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 881
 882                 /* First search for exact match */
 883                 for (i = 0; i < vfd->tvnormsize; i++)
 884                         if (*id == vfd->tvnorms[i].id)
 885                                 break;
 886                 /* Then for a generic video std that contains desired std */
 887                 if (i == vfd->tvnormsize)
 888                         for (i = 0; i < vfd->tvnormsize; i++)
 889                                 if (*id & vfd->tvnorms[i].id)
 890                                         break;
 891                 if (i == vfd->tvnormsize) {
 892                         break;
 893                 }
 894
 895                 /* Calls the specific handler */
 896                 if (vfd->vidioc_s_std)
 897                         ret=vfd->vidioc_s_std(file, fh, i);
 898                 else
 899                         ret=-EINVAL;
 900
 901                 /* Updates standard information */
 902                 if (!ret)
 903                         vfd->current_norm=*id;
 904
 905                 break;
 906         }
 907         case VIDIOC_QUERYSTD:
 908         {
 909                 v4l2_std_id *p=arg;
 910
 911                 if (!vfd->vidioc_querystd)
 912                         break;
 913                 ret=vfd->vidioc_querystd(file, fh, arg);
 914                 if (!ret)
 915                         dbgarg (cmd, "detected std=%Lu\n",
 916                                                 (unsigned long long)*p);
 917                 break;
 918         }
 919         /* ------ input switching ---------- */
 920         /* FIXME: Inputs can be handled inside videodev2 */
 921         case VIDIOC_ENUMINPUT:
 922         {
 923                 struct v4l2_input *p=arg;
 924                 int i=p->index;
 925
 926                 if (!vfd->vidioc_enum_input)
 927                         break;
 928                 memset(p, 0, sizeof(*p));
 929                 p->index=i;
 930
 931                 ret=vfd->vidioc_enum_input(file, fh, p);
 932                 if (!ret)
 933                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
 934                                         "audioset=%d, "
 935                                         "tuner=%d, std=%Ld, status=%d\n",
 936                                         p->index,p->name,p->type,p->audioset,
 937                                         p->tuner,
 938                                         (unsigned long long)p->std,
 939                                         p->status);
 940                 break;
 941         }
 942         case VIDIOC_G_INPUT:
 943         {
 944                 unsigned int *i = arg;
 945
 946                 if (!vfd->vidioc_g_input)
 947                         break;
 948                 ret=vfd->vidioc_g_input(file, fh, i);
 949                 if (!ret)
 950                         dbgarg (cmd, "value=%d\n",*i);
 951                 break;
 952         }
 953         case VIDIOC_S_INPUT:
 954         {
 955                 unsigned int *i = arg;
 956
 957                 if (!vfd->vidioc_s_input)
 958                         break;
 959                 dbgarg (cmd, "value=%d\n",*i);
 960                 ret=vfd->vidioc_s_input(file, fh, *i);
 961                 break;
 962         }
 963
 964         /* ------ output switching ---------- */
 965         case VIDIOC_G_OUTPUT:
 966         {
 967                 unsigned int *i = arg;
 968
 969                 if (!vfd->vidioc_g_output)
 970                         break;
 971                 ret=vfd->vidioc_g_output(file, fh, i);
 972                 if (!ret)
 973                         dbgarg (cmd, "value=%d\n",*i);
 974                 break;
 975         }
 976         case VIDIOC_S_OUTPUT:
 977         {
 978                 unsigned int *i = arg;
 979
 980                 if (!vfd->vidioc_s_output)
 981                         break;
 982                 dbgarg (cmd, "value=%d\n",*i);
 983                 ret=vfd->vidioc_s_output(file, fh, *i);
 984                 break;
 985         }
 986
 987         /* --- controls ---------------------------------------------- */
 988         case VIDIOC_QUERYCTRL:
 989         {
 990                 struct v4l2_queryctrl *p=arg;
 991
 992                 if (!vfd->vidioc_queryctrl)
 993                         break;
 994                 ret=vfd->vidioc_queryctrl(file, fh, p);
 995
 996                 if (!ret)
 997                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
 998                                         "min/max=%d/%d,"
 999                                         " step=%d, default=%d, flags=0x%08x\n",
1000                                         p->id,p->type,p->name,p->minimum,
1001                                         p->maximum,p->step,p->default_value,
1002                                         p->flags);
1003                 break;
1004         }
1005         case VIDIOC_G_CTRL:
1006         {
1007                 struct v4l2_control *p = arg;
1008
1009                 if (!vfd->vidioc_g_ctrl)
1010                         break;
1011                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1012
1013                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1014                 if (!ret)
1015                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1016                 break;
1017         }
1018         case VIDIOC_S_CTRL:
1019         {
1020                 struct v4l2_control *p = arg;
1021
1022                 if (!vfd->vidioc_s_ctrl)
1023                         break;
1024                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1025
1026                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1027                 break;
1028         }
1029         case VIDIOC_G_EXT_CTRLS:
1030         {
1031                 struct v4l2_ext_controls *p = arg;
1032
1033                 if (vfd->vidioc_g_ext_ctrls) {
1034                         dbgarg(cmd, "count=%d\n", p->count);
1035
1036                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1037                 }
1038                 break;
1039         }
1040         case VIDIOC_S_EXT_CTRLS:
1041         {
1042                 struct v4l2_ext_controls *p = arg;
1043
1044                 if (vfd->vidioc_s_ext_ctrls) {
1045                         dbgarg(cmd, "count=%d\n", p->count);
1046
1047                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1048                 }
1049                 break;
1050         }
1051         case VIDIOC_TRY_EXT_CTRLS:
1052         {
1053                 struct v4l2_ext_controls *p = arg;
1054
1055                 if (vfd->vidioc_try_ext_ctrls) {
1056                         dbgarg(cmd, "count=%d\n", p->count);
1057
1058                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1059                 }
1060                 break;
1061         }
1062         case VIDIOC_QUERYMENU:
1063         {
1064                 struct v4l2_querymenu *p=arg;
1065                 if (!vfd->vidioc_querymenu)
1066                         break;
1067                 ret=vfd->vidioc_querymenu(file, fh, p);
1068                 if (!ret)
1069                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1070                                                 p->id,p->index,p->name);
1071                 break;
1072         }
1073         /* --- audio ---------------------------------------------- */
1074         case VIDIOC_ENUMAUDIO:
1075         {
1076                 struct v4l2_audio *p=arg;
1077
1078                 if (!vfd->vidioc_enumaudio)
1079                         break;
1080                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1081                 ret=vfd->vidioc_enumaudio(file, fh, p);
1082                 if (!ret)
1083                         dbgarg2("index=%d, name=%s, capability=%d, "
1084                                         "mode=%d\n",p->index,p->name,
1085                                         p->capability, p->mode);
1086                 break;
1087         }
1088         case VIDIOC_G_AUDIO:
1089         {
1090                 struct v4l2_audio *p=arg;
1091
1092                 if (!vfd->vidioc_g_audio)
1093                         break;
1094                 dbgarg(cmd, "Get for index=%d\n", p->index);
1095                 ret=vfd->vidioc_g_audio(file, fh, p);
1096                 if (!ret)
1097                         dbgarg2("index=%d, name=%s, capability=%d, "
1098                                         "mode=%d\n",p->index,
1099                                         p->name,p->capability, p->mode);
1100                 break;
1101         }
1102         case VIDIOC_S_AUDIO:
1103         {
1104                 struct v4l2_audio *p=arg;
1105
1106                 if (!vfd->vidioc_s_audio)
1107                         break;
1108                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1109                                         "mode=%d\n", p->index, p->name,
1110                                         p->capability, p->mode);
1111                 ret=vfd->vidioc_s_audio(file, fh, p);
1112                 break;
1113         }
1114         case VIDIOC_ENUMAUDOUT:
1115         {
1116                 struct v4l2_audioout *p=arg;
1117
1118                 if (!vfd->vidioc_enumaudout)
1119                         break;
1120                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1121                 ret=vfd->vidioc_enumaudout(file, fh, p);
1122                 if (!ret)
1123                         dbgarg2("index=%d, name=%s, capability=%d, "
1124                                         "mode=%d\n", p->index, p->name,
1125                                         p->capability,p->mode);
1126                 break;
1127         }
1128         case VIDIOC_G_AUDOUT:
1129         {
1130                 struct v4l2_audioout *p=arg;
1131
1132                 if (!vfd->vidioc_g_audout)
1133                         break;
1134                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1135                 ret=vfd->vidioc_g_audout(file, fh, p);
1136                 if (!ret)
1137                         dbgarg2("index=%d, name=%s, capability=%d, "
1138                                         "mode=%d\n", p->index, p->name,
1139                                         p->capability,p->mode);
1140                 break;
1141         }
1142         case VIDIOC_S_AUDOUT:
1143         {
1144                 struct v4l2_audioout *p=arg;
1145
1146                 if (!vfd->vidioc_s_audout)
1147                         break;
1148                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1149                                         "mode=%d\n", p->index, p->name,
1150                                         p->capability,p->mode);
1151
1152                 ret=vfd->vidioc_s_audout(file, fh, p);
1153                 break;
1154         }
1155         case VIDIOC_G_MODULATOR:
1156         {
1157                 struct v4l2_modulator *p=arg;
1158                 if (!vfd->vidioc_g_modulator)
1159                         break;
1160                 ret=vfd->vidioc_g_modulator(file, fh, p);
1161                 if (!ret)
1162                         dbgarg(cmd, "index=%d, name=%s, "
1163                                         "capability=%d, rangelow=%d,"
1164                                         " rangehigh=%d, txsubchans=%d\n",
1165                                         p->index, p->name,p->capability,
1166                                         p->rangelow, p->rangehigh,
1167                                         p->txsubchans);
1168                 break;
1169         }
1170         case VIDIOC_S_MODULATOR:
1171         {
1172                 struct v4l2_modulator *p=arg;
1173                 if (!vfd->vidioc_s_modulator)
1174                         break;
1175                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1176                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1177                                 p->index, p->name,p->capability,p->rangelow,
1178                                 p->rangehigh,p->txsubchans);
1179                         ret=vfd->vidioc_s_modulator(file, fh, p);
1180                 break;
1181         }
1182         case VIDIOC_G_CROP:
1183         {
1184                 struct v4l2_crop *p=arg;
1185                 if (!vfd->vidioc_g_crop)
1186                         break;
1187                 ret=vfd->vidioc_g_crop(file, fh, p);
1188                 if (!ret) {
1189                         dbgarg(cmd, "type=%d\n", p->type);
1190                         dbgrect(vfd, "", &p->c);
1191                 }
1192                 break;
1193         }
1194         case VIDIOC_S_CROP:
1195         {
1196                 struct v4l2_crop *p=arg;
1197                 if (!vfd->vidioc_s_crop)
1198                         break;
1199                 dbgarg(cmd, "type=%d\n", p->type);
1200                 dbgrect(vfd, "", &p->c);
1201                 ret=vfd->vidioc_s_crop(file, fh, p);
1202                 break;
1203         }
1204         case VIDIOC_CROPCAP:
1205         {
1206                 struct v4l2_cropcap *p=arg;
1207                 /*FIXME: Should also show v4l2_fract pixelaspect */
1208                 if (!vfd->vidioc_cropcap)
1209                         break;
1210                 dbgarg(cmd, "type=%d\n", p->type);
1211                 dbgrect(vfd, "bounds ", &p->bounds);
1212                 dbgrect(vfd, "defrect ", &p->defrect);
1213                 ret=vfd->vidioc_cropcap(file, fh, p);
1214                 break;
1215         }
1216         case VIDIOC_G_MPEGCOMP:
1217         {
1218                 struct v4l2_mpeg_compression *p=arg;
1219
1220                 /*FIXME: Several fields not shown */
1221                 if (!vfd->vidioc_g_mpegcomp)
1222                         break;
1223                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1224                 if (!ret)
1225                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1226                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1227                                         "ps_size=%d, au_sample_rate=%d, "
1228                                         "au_pesid=%c, vi_frame_rate=%d, "
1229                                         "vi_frames_per_gop=%d, "
1230                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1231                                         p->ts_pid_pmt,p->ts_pid_audio,
1232                                         p->ts_pid_video,p->ts_pid_pcr,
1233                                         p->ps_size, p->au_sample_rate,
1234                                         p->au_pesid, p->vi_frame_rate,
1235                                         p->vi_frames_per_gop,
1236                                         p->vi_bframes_count, p->vi_pesid);
1237                 break;
1238         }
1239         case VIDIOC_S_MPEGCOMP:
1240         {
1241                 struct v4l2_mpeg_compression *p=arg;
1242                 /*FIXME: Several fields not shown */
1243                 if (!vfd->vidioc_s_mpegcomp)
1244                         break;
1245                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1246                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1247                                 "au_sample_rate=%d, au_pesid=%c, "
1248                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1249                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1250                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1251                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1252                                 p->au_pesid, p->vi_frame_rate,
1253                                 p->vi_frames_per_gop, p->vi_bframes_count,
1254                                 p->vi_pesid);
1255                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1256                 break;
1257         }
1258         case VIDIOC_G_JPEGCOMP:
1259         {
1260                 struct v4l2_jpegcompression *p=arg;
1261                 if (!vfd->vidioc_g_jpegcomp)
1262                         break;
1263                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1264                 if (!ret)
1265                         dbgarg (cmd, "quality=%d, APPn=%d, "
1266                                                 "APP_len=%d, COM_len=%d, "
1267                                                 "jpeg_markers=%d\n",
1268                                                 p->quality,p->APPn,p->APP_len,
1269                                                 p->COM_len,p->jpeg_markers);
1270                 break;
1271         }
1272         case VIDIOC_S_JPEGCOMP:
1273         {
1274                 struct v4l2_jpegcompression *p=arg;
1275                 if (!vfd->vidioc_g_jpegcomp)
1276                         break;
1277                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1278                                         "COM_len=%d, jpeg_markers=%d\n",
1279                                         p->quality,p->APPn,p->APP_len,
1280                                         p->COM_len,p->jpeg_markers);
1281                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1282                 break;
1283         }
1284         case VIDIOC_G_PARM:
1285         {
1286                 struct v4l2_streamparm *p=arg;
1287                 if (vfd->vidioc_g_parm) {
1288                         ret=vfd->vidioc_g_parm(file, fh, p);
1289                 } else {
1290                         struct v4l2_standard s;
1291                         int i;
1292
1293                         if (!vfd->tvnormsize) {
1294                                 printk (KERN_WARNING "%s: no TV norms defined!\n",
1295                                                         vfd->name);
1296                                 break;
1297                         }
1298
1299                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1300                                 return -EINVAL;
1301
1302                         for (i = 0; i < vfd->tvnormsize; i++)
1303                                 if (vfd->tvnorms[i].id == vfd->current_norm)
1304                                         break;
1305                         if (i >= vfd->tvnormsize)
1306                                 return -EINVAL;
1307
1308                         v4l2_video_std_construct(&s, vfd->current_norm,
1309                                                  vfd->tvnorms[i].name);
1310
1311                         memset(p,0,sizeof(*p));
1312
1313                         p->parm.capture.timeperframe = s.frameperiod;
1314                         ret=0;
1315                 }
1316
1317                 dbgarg (cmd, "type=%d\n", p->type);
1318                 break;
1319         }
1320         case VIDIOC_S_PARM:
1321         {
1322                 struct v4l2_streamparm *p=arg;
1323                 if (!vfd->vidioc_s_parm)
1324                         break;
1325                 dbgarg (cmd, "type=%d\n", p->type);
1326                 ret=vfd->vidioc_s_parm(file, fh, p);
1327                 break;
1328         }
1329         case VIDIOC_G_TUNER:
1330         {
1331                 struct v4l2_tuner *p=arg;
1332                 if (!vfd->vidioc_g_tuner)
1333                         break;
1334                 ret=vfd->vidioc_g_tuner(file, fh, p);
1335                 if (!ret)
1336                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1337                                         "capability=%d, rangelow=%d, "
1338                                         "rangehigh=%d, signal=%d, afc=%d, "
1339                                         "rxsubchans=%d, audmode=%d\n",
1340                                         p->index, p->name, p->type,
1341                                         p->capability, p->rangelow,
1342                                         p->rangehigh, p->rxsubchans,
1343                                         p->audmode, p->signal, p->afc);
1344                 break;
1345         }
1346         case VIDIOC_S_TUNER:
1347         {
1348                 struct v4l2_tuner *p=arg;
1349                 if (!vfd->vidioc_s_tuner)
1350                         break;
1351                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1352                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1353                                 "signal=%d, afc=%d, rxsubchans=%d, "
1354                                 "audmode=%d\n",p->index, p->name, p->type,
1355                                 p->capability, p->rangelow,p->rangehigh,
1356                                 p->rxsubchans, p->audmode, p->signal,
1357                                 p->afc);
1358                 ret=vfd->vidioc_s_tuner(file, fh, p);
1359                 break;
1360         }
1361         case VIDIOC_G_FREQUENCY:
1362         {
1363                 struct v4l2_frequency *p=arg;
1364                 if (!vfd->vidioc_g_frequency)
1365                         break;
1366                 ret=vfd->vidioc_g_frequency(file, fh, p);
1367                 if (!ret)
1368                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1369                                                 p->tuner,p->type,p->frequency);
1370                 break;
1371         }
1372         case VIDIOC_S_FREQUENCY:
1373         {
1374                 struct v4l2_frequency *p=arg;
1375                 if (!vfd->vidioc_s_frequency)
1376                         break;
1377                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1378                                 p->tuner,p->type,p->frequency);
1379                 ret=vfd->vidioc_s_frequency(file, fh, p);
1380                 break;
1381         }
1382         case VIDIOC_G_SLICED_VBI_CAP:
1383         {
1384                 struct v4l2_sliced_vbi_cap *p=arg;
1385                 if (!vfd->vidioc_g_sliced_vbi_cap)
1386                         break;
1387                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1388                 if (!ret)
1389                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1390                 break;
1391         }
1392         case VIDIOC_LOG_STATUS:
1393         {
1394                 if (!vfd->vidioc_log_status)
1395                         break;
1396                 ret=vfd->vidioc_log_status(file, fh);
1397                 break;
1398         }
1399
1400         /* --- Others --------------------------------------------- */
1401
1402         default:
1403                 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,__video_do_ioctl);
1404         }
1405
1406         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1407                 if (ret<0) {
1408                         printk ("%s: err:\n", vfd->name);
1409                         v4l_print_ioctl(vfd->name, cmd);
1410                 }
1411         }
1412
1413         return ret;
1414 }
1415
1416 int video_ioctl2 (struct inode *inode, struct file *file,
1417                unsigned int cmd, unsigned long arg)
1418 {
1419         char    sbuf[128];
1420         void    *mbuf = NULL;
1421         void    *parg = NULL;
1422         int     err  = -EINVAL;
1423         int     is_ext_ctrl;
1424         size_t  ctrls_size = 0;
1425         void __user *user_ptr = NULL;
1426
1427 #ifdef __OLD_VIDIOC_
1428         cmd = video_fix_command(cmd);
1429 #endif
1430         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1431                        cmd == VIDIOC_TRY_EXT_CTRLS);
1432
1433         /*  Copy arguments into temp kernel buffer  */
1434         switch (_IOC_DIR(cmd)) {
1435         case _IOC_NONE:
1436                 parg = NULL;
1437                 break;
1438         case _IOC_READ:
1439         case _IOC_WRITE:
1440         case (_IOC_WRITE | _IOC_READ):
1441                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1442                         parg = sbuf;
1443                 } else {
1444                         /* too big to allocate from stack */
1445                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1446                         if (NULL == mbuf)
1447                                 return -ENOMEM;
1448                         parg = mbuf;
1449                 }
1450
1451                 err = -EFAULT;
1452                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1453                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1454                                 goto out;
1455                 break;
1456         }
1457
1458         if (is_ext_ctrl) {
1459                 struct v4l2_ext_controls *p = parg;
1460
1461                 /* In case of an error, tell the caller that it wasn't
1462                    a specific control that caused it. */
1463                 p->error_idx = p->count;
1464                 user_ptr = (void __user *)p->controls;
1465                 if (p->count) {
1466                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1467                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1468                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1469                         err = -ENOMEM;
1470                         if (NULL == mbuf)
1471                                 goto out_ext_ctrl;
1472                         err = -EFAULT;
1473                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1474                                 goto out_ext_ctrl;
1475                         p->controls = mbuf;
1476                 }
1477         }
1478
1479         /* Handles IOCTL */
1480         err = __video_do_ioctl(inode, file, cmd, parg);
1481         if (err == -ENOIOCTLCMD)
1482                 err = -EINVAL;
1483         if (is_ext_ctrl) {
1484                 struct v4l2_ext_controls *p = parg;
1485
1486                 p->controls = (void *)user_ptr;
1487                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1488                         err = -EFAULT;
1489                 goto out_ext_ctrl;
1490         }
1491         if (err < 0)
1492                 goto out;
1493
1494 out_ext_ctrl:
1495         /*  Copy results into user buffer  */
1496         switch (_IOC_DIR(cmd))
1497         {
1498         case _IOC_READ:
1499         case (_IOC_WRITE | _IOC_READ):
1500                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1501                         err = -EFAULT;
1502                 break;
1503         }
1504
1505 out:
1506         kfree(mbuf);
1507         return err;
1508 }
1509
1510
1511 static struct file_operations video_fops;
1512
1513 /**
1514  *      video_register_device - register video4linux devices
1515  *      @vfd:  video device structure we want to register
1516  *      @type: type of device to register
1517  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1518  *             -1 == first free)
1519  *
1520  *      The registration code assigns minor numbers based on the type
1521  *      requested. -ENFILE is returned in all the device slots for this
1522  *      category are full. If not then the minor field is set and the
1523  *      driver initialize function is called (if non %NULL).
1524  *
1525  *      Zero is returned on success.
1526  *
1527  *      Valid types are
1528  *
1529  *      %VFL_TYPE_GRABBER - A frame grabber
1530  *
1531  *      %VFL_TYPE_VTX - A teletext device
1532  *
1533  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1534  *
1535  *      %VFL_TYPE_RADIO - A radio card
1536  */
1537
1538 int video_register_device(struct video_device *vfd, int type, int nr)
1539 {
1540         int i=0;
1541         int base;
1542         int end;
1543         int ret;
1544         char *name_base;
1545
1546         switch(type)
1547         {
1548                 case VFL_TYPE_GRABBER:
1549                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1550                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1551                         name_base = "video";
1552                         break;
1553                 case VFL_TYPE_VTX:
1554                         base=MINOR_VFL_TYPE_VTX_MIN;
1555                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1556                         name_base = "vtx";
1557                         break;
1558                 case VFL_TYPE_VBI:
1559                         base=MINOR_VFL_TYPE_VBI_MIN;
1560                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1561                         name_base = "vbi";
1562                         break;
1563                 case VFL_TYPE_RADIO:
1564                         base=MINOR_VFL_TYPE_RADIO_MIN;
1565                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1566                         name_base = "radio";
1567                         break;
1568                 default:
1569                         printk(KERN_ERR "%s called with unknown type: %d\n",
1570                                __FUNCTION__, type);
1571                         return -1;
1572         }
1573
1574         /* pick a minor number */
1575         mutex_lock(&videodev_lock);
1576         if (nr >= 0  &&  nr < end-base) {
1577                 /* use the one the driver asked for */
1578                 i = base+nr;
1579                 if (NULL != video_device[i]) {
1580                         mutex_unlock(&videodev_lock);
1581                         return -ENFILE;
1582                 }
1583         } else {
1584                 /* use first free */
1585                 for(i=base;i<end;i++)
1586                         if (NULL == video_device[i])
1587                                 break;
1588                 if (i == end) {
1589                         mutex_unlock(&videodev_lock);
1590                         return -ENFILE;
1591                 }
1592         }
1593         video_device[i]=vfd;
1594         vfd->minor=i;
1595         mutex_unlock(&videodev_lock);
1596         mutex_init(&vfd->lock);
1597
1598         /* sysfs class */
1599         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1600         if (vfd->dev)
1601                 vfd->class_dev.dev = vfd->dev;
1602         vfd->class_dev.class       = &video_class;
1603         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1604         sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
1605         ret = class_device_register(&vfd->class_dev);
1606         if (ret < 0) {
1607                 printk(KERN_ERR "%s: class_device_register failed\n",
1608                        __FUNCTION__);
1609                 goto fail_minor;
1610         }
1611         ret = class_device_create_file(&vfd->class_dev, &class_device_attr_name);
1612         if (ret < 0) {
1613                 printk(KERN_ERR "%s: class_device_create_file 'name' failed\n",
1614                        __FUNCTION__);
1615                 goto fail_classdev;
1616         }
1617
1618 #if 1
1619         /* needed until all drivers are fixed */
1620         if (!vfd->release)
1621                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1622                        "Please fix your driver for proper sysfs support, see "
1623                        "http://lwn.net/Articles/36850/\n", vfd->name);
1624 #endif
1625         return 0;
1626
1627 fail_classdev:
1628         class_device_unregister(&vfd->class_dev);
1629 fail_minor:
1630         mutex_lock(&videodev_lock);
1631         video_device[vfd->minor] = NULL;
1632         vfd->minor = -1;
1633         mutex_unlock(&videodev_lock);
1634         return ret;
1635 }
1636
1637 /**
1638  *      video_unregister_device - unregister a video4linux device
1639  *      @vfd: the device to unregister
1640  *
1641  *      This unregisters the passed device and deassigns the minor
1642  *      number. Future open calls will be met with errors.
1643  */
1644
1645 void video_unregister_device(struct video_device *vfd)
1646 {
1647         mutex_lock(&videodev_lock);
1648         if(video_device[vfd->minor]!=vfd)
1649                 panic("videodev: bad unregister");
1650
1651         video_device[vfd->minor]=NULL;
1652         class_device_unregister(&vfd->class_dev);
1653         mutex_unlock(&videodev_lock);
1654 }
1655
1656 /*
1657  * Video fs operations
1658  */
1659 static struct file_operations video_fops=
1660 {
1661         .owner          = THIS_MODULE,
1662         .llseek         = no_llseek,
1663         .open           = video_open,
1664 };
1665
1666 /*
1667  *      Initialise video for linux
1668  */
1669
1670 static int __init videodev_init(void)
1671 {
1672         int ret;
1673
1674         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1675         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1676                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1677                 return -EIO;
1678         }
1679
1680         ret = class_register(&video_class);
1681         if (ret < 0) {
1682                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1683                 printk(KERN_WARNING "video_dev: class_register failed\n");
1684                 return -EIO;
1685         }
1686
1687         return 0;
1688 }
1689
1690 static void __exit videodev_exit(void)
1691 {
1692         class_unregister(&video_class);
1693         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1694 }
1695
1696 module_init(videodev_init)
1697 module_exit(videodev_exit)
1698
1699 EXPORT_SYMBOL(video_register_device);
1700 EXPORT_SYMBOL(video_unregister_device);
1701 EXPORT_SYMBOL(video_devdata);
1702 EXPORT_SYMBOL(video_usercopy);
1703 EXPORT_SYMBOL(video_exclusive_open);
1704 EXPORT_SYMBOL(video_exclusive_release);
1705 EXPORT_SYMBOL(video_ioctl2);
1706 EXPORT_SYMBOL(video_device_alloc);
1707 EXPORT_SYMBOL(video_device_release);
1708
1709 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1710 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1711 MODULE_LICENSE("GPL");
1712
1713
1714 /*
1715  * Local variables:
1716  * c-basic-offset: 8
1717  * End:
1718  */