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         if (_IOC_TYPE(cmd)=='v')
 432                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 433                                                 __video_do_ioctl);
 434
 435         switch(cmd) {
 436         /* --- capabilities ------------------------------------------ */
 437         case VIDIOC_QUERYCAP:
 438         {
 439                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 440                 memset(cap, 0, sizeof(*cap));
 441
 442                 if (!vfd->vidioc_querycap)
 443                         break;
 444
 445                 ret=vfd->vidioc_querycap(file, fh, cap);
 446                 if (!ret)
 447                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 448                                         "version=0x%08x, "
 449                                         "capabilities=0x%08x\n",
 450                                         cap->driver,cap->card,cap->bus_info,
 451                                         cap->version,
 452                                         cap->capabilities);
 453                 break;
 454         }
 455
 456         /* --- priority ------------------------------------------ */
 457         case VIDIOC_G_PRIORITY:
 458         {
 459                 enum v4l2_priority *p=arg;
 460
 461                 if (!vfd->vidioc_g_priority)
 462                         break;
 463                 ret=vfd->vidioc_g_priority(file, fh, p);
 464                 if (!ret)
 465                         dbgarg(cmd, "priority is %d\n", *p);
 466                 break;
 467         }
 468         case VIDIOC_S_PRIORITY:
 469         {
 470                 enum v4l2_priority *p=arg;
 471
 472                 if (!vfd->vidioc_s_priority)
 473                         break;
 474                 dbgarg(cmd, "setting priority to %d\n", *p);
 475                 ret=vfd->vidioc_s_priority(file, fh, *p);
 476                 break;
 477         }
 478
 479         /* --- capture ioctls ---------------------------------------- */
 480         case VIDIOC_ENUM_FMT:
 481         {
 482                 struct v4l2_fmtdesc *f = arg;
 483                 enum v4l2_buf_type type;
 484                 unsigned int index;
 485
 486                 index = f->index;
 487                 type  = f->type;
 488                 memset(f,0,sizeof(*f));
 489                 f->index = index;
 490                 f->type  = type;
 491
 492                 switch (type) {
 493                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 494                         if (vfd->vidioc_enum_fmt_cap)
 495                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 496                         break;
 497                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 498                         if (vfd->vidioc_enum_fmt_overlay)
 499                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 500                         break;
 501                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 502                         if (vfd->vidioc_enum_fmt_vbi)
 503                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 504                         break;
 505                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 506                         if (vfd->vidioc_enum_fmt_vbi_output)
 507                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 508                                                                 fh, f);
 509                         break;
 510                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 511                         if (vfd->vidioc_enum_fmt_vbi_capture)
 512                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 513                                                                 fh, f);
 514                         break;
 515                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 516                         if (vfd->vidioc_enum_fmt_video_output)
 517                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 518                                                                 fh, f);
 519                         break;
 520                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 521                         if (vfd->vidioc_enum_fmt_vbi_output)
 522                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 523                                                                 fh, f);
 524                         break;
 525                 case V4L2_BUF_TYPE_PRIVATE:
 526                         if (vfd->vidioc_enum_fmt_type_private)
 527                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 528                                                                 fh, f);
 529                         break;
 530                 }
 531                 if (!ret)
 532                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 533                                         "description=%s,"
 534                                         " pixelformat=0x%8x\n",
 535                                         f->index, f->type, f->flags,
 536                                         f->description,
 537                                         f->pixelformat);
 538
 539                 break;
 540         }
 541         case VIDIOC_G_FMT:
 542         {
 543                 struct v4l2_format *f = (struct v4l2_format *)arg;
 544                 enum v4l2_buf_type type=f->type;
 545
 546                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 547                 f->type=type;
 548
 549                 /* FIXME: Should be one dump per type */
 550                 dbgarg (cmd, "type=%s\n", prt_names(type,
 551                                         v4l2_type_names_FIXME));
 552
 553                 switch (type) {
 554                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 555                         if (vfd->vidioc_g_fmt_cap)
 556                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 557                         if (!ret)
 558                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 559                         break;
 560                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 561                         if (vfd->vidioc_g_fmt_overlay)
 562                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 563                         break;
 564                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 565                         if (vfd->vidioc_g_fmt_vbi)
 566                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 567                         break;
 568                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 569                         if (vfd->vidioc_g_fmt_vbi_output)
 570                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 571                         break;
 572                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 573                         if (vfd->vidioc_g_fmt_vbi_capture)
 574                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 575                         break;
 576                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 577                         if (vfd->vidioc_g_fmt_video_output)
 578                                 ret=vfd->vidioc_g_fmt_video_output(file,
 579                                                                 fh, f);
 580                         break;
 581                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 582                         if (vfd->vidioc_g_fmt_vbi_output)
 583                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 584                         break;
 585                 case V4L2_BUF_TYPE_PRIVATE:
 586                         if (vfd->vidioc_g_fmt_type_private)
 587                                 ret=vfd->vidioc_g_fmt_type_private(file,
 588                                                                 fh, f);
 589                         break;
 590                 }
 591
 592                 break;
 593         }
 594         case VIDIOC_S_FMT:
 595         {
 596                 struct v4l2_format *f = (struct v4l2_format *)arg;
 597
 598                 /* FIXME: Should be one dump per type */
 599                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 600                                         v4l2_type_names_FIXME));
 601
 602                 switch (f->type) {
 603                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 604                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 605                         if (vfd->vidioc_s_fmt_cap)
 606                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 607                         break;
 608                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 609                         if (vfd->vidioc_s_fmt_overlay)
 610                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 611                         break;
 612                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 613                         if (vfd->vidioc_s_fmt_vbi)
 614                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 615                         break;
 616                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 617                         if (vfd->vidioc_s_fmt_vbi_output)
 618                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 619                         break;
 620                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 621                         if (vfd->vidioc_s_fmt_vbi_capture)
 622                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 623                         break;
 624                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 625                         if (vfd->vidioc_s_fmt_video_output)
 626                                 ret=vfd->vidioc_s_fmt_video_output(file,
 627                                                                 fh, f);
 628                         break;
 629                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 630                         if (vfd->vidioc_s_fmt_vbi_output)
 631                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 632                                                                 fh, f);
 633                         break;
 634                 case V4L2_BUF_TYPE_PRIVATE:
 635                         if (vfd->vidioc_s_fmt_type_private)
 636                                 ret=vfd->vidioc_s_fmt_type_private(file,
 637                                                                 fh, f);
 638                         break;
 639                 }
 640                 break;
 641         }
 642         case VIDIOC_TRY_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                 switch (f->type) {
 650                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 651                         if (vfd->vidioc_try_fmt_cap)
 652                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 653                         if (!ret)
 654                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 655                         break;
 656                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 657                         if (vfd->vidioc_try_fmt_overlay)
 658                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 659                         break;
 660                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 661                         if (vfd->vidioc_try_fmt_vbi)
 662                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 663                         break;
 664                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 665                         if (vfd->vidioc_try_fmt_vbi_output)
 666                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 667                                                                 fh, f);
 668                         break;
 669                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 670                         if (vfd->vidioc_try_fmt_vbi_capture)
 671                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 672                                                                 fh, f);
 673                         break;
 674                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 675                         if (vfd->vidioc_try_fmt_video_output)
 676                                 ret=vfd->vidioc_try_fmt_video_output(file,
 677                                                                 fh, f);
 678                         break;
 679                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 680                         if (vfd->vidioc_try_fmt_vbi_output)
 681                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 682                                                                 fh, f);
 683                         break;
 684                 case V4L2_BUF_TYPE_PRIVATE:
 685                         if (vfd->vidioc_try_fmt_type_private)
 686                                 ret=vfd->vidioc_try_fmt_type_private(file,
 687                                                                 fh, f);
 688                         break;
 689                 }
 690
 691                 break;
 692         }
 693         /* FIXME: Those buf reqs could be handled here,
 694            with some changes on videobuf to allow its header to be included at
 695            videodev2.h or being merged at videodev2.
 696          */
 697         case VIDIOC_REQBUFS:
 698         {
 699                 struct v4l2_requestbuffers *p=arg;
 700
 701                 if (!vfd->vidioc_reqbufs)
 702                         break;
 703                 ret = check_fmt (vfd, p->type);
 704                 if (ret)
 705                         break;
 706
 707                 ret=vfd->vidioc_reqbufs(file, fh, p);
 708                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 709                                 p->count,
 710                                 prt_names(p->type,v4l2_type_names_FIXME),
 711                                 prt_names(p->memory,v4l2_memory_names));
 712                 break;
 713         }
 714         case VIDIOC_QUERYBUF:
 715         {
 716                 struct v4l2_buffer *p=arg;
 717
 718                 if (!vfd->vidioc_querybuf)
 719                         break;
 720                 ret = check_fmt (vfd, p->type);
 721                 if (ret)
 722                         break;
 723
 724                 ret=vfd->vidioc_querybuf(file, fh, p);
 725                 if (!ret)
 726                         dbgbuf(cmd,vfd,p);
 727                 break;
 728         }
 729         case VIDIOC_QBUF:
 730         {
 731                 struct v4l2_buffer *p=arg;
 732
 733                 if (!vfd->vidioc_qbuf)
 734                         break;
 735                 ret = check_fmt (vfd, p->type);
 736                 if (ret)
 737                         break;
 738
 739                 ret=vfd->vidioc_qbuf(file, fh, p);
 740                 if (!ret)
 741                         dbgbuf(cmd,vfd,p);
 742                 break;
 743         }
 744         case VIDIOC_DQBUF:
 745         {
 746                 struct v4l2_buffer *p=arg;
 747                 if (!vfd->vidioc_dqbuf)
 748                         break;
 749                 ret = check_fmt (vfd, p->type);
 750                 if (ret)
 751                         break;
 752
 753                 ret=vfd->vidioc_dqbuf(file, fh, p);
 754                 if (!ret)
 755                         dbgbuf(cmd,vfd,p);
 756                 break;
 757         }
 758         case VIDIOC_OVERLAY:
 759         {
 760                 int *i = arg;
 761
 762                 if (!vfd->vidioc_overlay)
 763                         break;
 764                 dbgarg (cmd, "value=%d\n",*i);
 765                 ret=vfd->vidioc_overlay(file, fh, *i);
 766                 break;
 767         }
 768 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 769         /* --- streaming capture ------------------------------------- */
 770         case VIDIOCGMBUF:
 771         {
 772                 struct video_mbuf *p=arg;
 773
 774                 memset(p,0,sizeof(p));
 775
 776                 if (!vfd->vidiocgmbuf)
 777                         break;
 778                 ret=vfd->vidiocgmbuf(file, fh, p);
 779                 if (!ret)
 780                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 781                                                 p->size, p->frames,
 782                                                 (unsigned long)p->offsets);
 783                 break;
 784         }
 785 #endif
 786         case VIDIOC_G_FBUF:
 787         {
 788                 struct v4l2_framebuffer *p=arg;
 789                 if (!vfd->vidioc_g_fbuf)
 790                         break;
 791                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 792                 if (!ret) {
 793                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 794                                         p->capability,p->flags,
 795                                         (unsigned long)p->base);
 796                         v4l_print_pix_fmt (vfd, &p->fmt);
 797                 }
 798                 break;
 799         }
 800         case VIDIOC_S_FBUF:
 801         {
 802                 struct v4l2_framebuffer *p=arg;
 803                 if (!vfd->vidioc_s_fbuf)
 804                         break;
 805
 806                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 807                                 p->capability,p->flags,(unsigned long)p->base);
 808                 v4l_print_pix_fmt (vfd, &p->fmt);
 809                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 810
 811                 break;
 812         }
 813         case VIDIOC_STREAMON:
 814         {
 815                 enum v4l2_buf_type i = *(int *)arg;
 816                 if (!vfd->vidioc_streamon)
 817                         break;
 818                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 819                 ret=vfd->vidioc_streamon(file, fh,i);
 820                 break;
 821         }
 822         case VIDIOC_STREAMOFF:
 823         {
 824                 enum v4l2_buf_type i = *(int *)arg;
 825
 826                 if (!vfd->vidioc_streamoff)
 827                         break;
 828                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 829                 ret=vfd->vidioc_streamoff(file, fh, i);
 830                 break;
 831         }
 832         /* ---------- tv norms ---------- */
 833         case VIDIOC_ENUMSTD:
 834         {
 835                 struct v4l2_standard *p = arg;
 836                 unsigned int index = p->index;
 837
 838                 if (!vfd->tvnormsize) {
 839                         printk (KERN_WARNING "%s: no TV norms defined!\n",
 840                                                 vfd->name);
 841                         break;
 842                 }
 843
 844                 if (index<0 || index >= vfd->tvnormsize) {
 845                         ret=-EINVAL;
 846                         break;
 847                 }
 848                 v4l2_video_std_construct(p, vfd->tvnorms[p->index].id,
 849                                          vfd->tvnorms[p->index].name);
 850                 p->index = index;
 851
 852                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 853                                 "framelines=%d\n", p->index,
 854                                 (unsigned long long)p->id, p->name,
 855                                 p->frameperiod.numerator,
 856                                 p->frameperiod.denominator,
 857                                 p->framelines);
 858
 859                 ret=0;
 860                 break;
 861         }
 862         case VIDIOC_G_STD:
 863         {
 864                 v4l2_std_id *id = arg;
 865
 866                 *id = vfd->current_norm;
 867
 868                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 869
 870                 ret=0;
 871                 break;
 872         }
 873         case VIDIOC_S_STD:
 874         {
 875                 v4l2_std_id *id = arg;
 876                 unsigned int i;
 877
 878                 if (!vfd->tvnormsize) {
 879                         printk (KERN_WARNING "%s: no TV norms defined!\n",
 880                                                 vfd->name);
 881                         break;
 882                 }
 883
 884                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 885
 886                 /* First search for exact match */
 887                 for (i = 0; i < vfd->tvnormsize; i++)
 888                         if (*id == vfd->tvnorms[i].id)
 889                                 break;
 890                 /* Then for a generic video std that contains desired std */
 891                 if (i == vfd->tvnormsize)
 892                         for (i = 0; i < vfd->tvnormsize; i++)
 893                                 if (*id & vfd->tvnorms[i].id)
 894                                         break;
 895                 if (i == vfd->tvnormsize) {
 896                         break;
 897                 }
 898
 899                 /* Calls the specific handler */
 900                 if (vfd->vidioc_s_std)
 901                         ret=vfd->vidioc_s_std(file, fh, i);
 902                 else
 903                         ret=-EINVAL;
 904
 905                 /* Updates standard information */
 906                 if (!ret)
 907                         vfd->current_norm=*id;
 908
 909                 break;
 910         }
 911         case VIDIOC_QUERYSTD:
 912         {
 913                 v4l2_std_id *p=arg;
 914
 915                 if (!vfd->vidioc_querystd)
 916                         break;
 917                 ret=vfd->vidioc_querystd(file, fh, arg);
 918                 if (!ret)
 919                         dbgarg (cmd, "detected std=%Lu\n",
 920                                                 (unsigned long long)*p);
 921                 break;
 922         }
 923         /* ------ input switching ---------- */
 924         /* FIXME: Inputs can be handled inside videodev2 */
 925         case VIDIOC_ENUMINPUT:
 926         {
 927                 struct v4l2_input *p=arg;
 928                 int i=p->index;
 929
 930                 if (!vfd->vidioc_enum_input)
 931                         break;
 932                 memset(p, 0, sizeof(*p));
 933                 p->index=i;
 934
 935                 ret=vfd->vidioc_enum_input(file, fh, p);
 936                 if (!ret)
 937                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
 938                                         "audioset=%d, "
 939                                         "tuner=%d, std=%Ld, status=%d\n",
 940                                         p->index,p->name,p->type,p->audioset,
 941                                         p->tuner,
 942                                         (unsigned long long)p->std,
 943                                         p->status);
 944                 break;
 945         }
 946         case VIDIOC_G_INPUT:
 947         {
 948                 unsigned int *i = arg;
 949
 950                 if (!vfd->vidioc_g_input)
 951                         break;
 952                 ret=vfd->vidioc_g_input(file, fh, i);
 953                 if (!ret)
 954                         dbgarg (cmd, "value=%d\n",*i);
 955                 break;
 956         }
 957         case VIDIOC_S_INPUT:
 958         {
 959                 unsigned int *i = arg;
 960
 961                 if (!vfd->vidioc_s_input)
 962                         break;
 963                 dbgarg (cmd, "value=%d\n",*i);
 964                 ret=vfd->vidioc_s_input(file, fh, *i);
 965                 break;
 966         }
 967
 968         /* ------ output switching ---------- */
 969         case VIDIOC_G_OUTPUT:
 970         {
 971                 unsigned int *i = arg;
 972
 973                 if (!vfd->vidioc_g_output)
 974                         break;
 975                 ret=vfd->vidioc_g_output(file, fh, i);
 976                 if (!ret)
 977                         dbgarg (cmd, "value=%d\n",*i);
 978                 break;
 979         }
 980         case VIDIOC_S_OUTPUT:
 981         {
 982                 unsigned int *i = arg;
 983
 984                 if (!vfd->vidioc_s_output)
 985                         break;
 986                 dbgarg (cmd, "value=%d\n",*i);
 987                 ret=vfd->vidioc_s_output(file, fh, *i);
 988                 break;
 989         }
 990
 991         /* --- controls ---------------------------------------------- */
 992         case VIDIOC_QUERYCTRL:
 993         {
 994                 struct v4l2_queryctrl *p=arg;
 995
 996                 if (!vfd->vidioc_queryctrl)
 997                         break;
 998                 ret=vfd->vidioc_queryctrl(file, fh, p);
 999
1000                 if (!ret)
1001                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1002                                         "min/max=%d/%d,"
1003                                         " step=%d, default=%d, flags=0x%08x\n",
1004                                         p->id,p->type,p->name,p->minimum,
1005                                         p->maximum,p->step,p->default_value,
1006                                         p->flags);
1007                 break;
1008         }
1009         case VIDIOC_G_CTRL:
1010         {
1011                 struct v4l2_control *p = arg;
1012
1013                 if (!vfd->vidioc_g_ctrl)
1014                         break;
1015                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1016
1017                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1018                 if (!ret)
1019                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1020                 break;
1021         }
1022         case VIDIOC_S_CTRL:
1023         {
1024                 struct v4l2_control *p = arg;
1025
1026                 if (!vfd->vidioc_s_ctrl)
1027                         break;
1028                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1029
1030                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1031                 break;
1032         }
1033         case VIDIOC_G_EXT_CTRLS:
1034         {
1035                 struct v4l2_ext_controls *p = arg;
1036
1037                 if (vfd->vidioc_g_ext_ctrls) {
1038                         dbgarg(cmd, "count=%d\n", p->count);
1039
1040                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1041                 }
1042                 break;
1043         }
1044         case VIDIOC_S_EXT_CTRLS:
1045         {
1046                 struct v4l2_ext_controls *p = arg;
1047
1048                 if (vfd->vidioc_s_ext_ctrls) {
1049                         dbgarg(cmd, "count=%d\n", p->count);
1050
1051                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1052                 }
1053                 break;
1054         }
1055         case VIDIOC_TRY_EXT_CTRLS:
1056         {
1057                 struct v4l2_ext_controls *p = arg;
1058
1059                 if (vfd->vidioc_try_ext_ctrls) {
1060                         dbgarg(cmd, "count=%d\n", p->count);
1061
1062                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1063                 }
1064                 break;
1065         }
1066         case VIDIOC_QUERYMENU:
1067         {
1068                 struct v4l2_querymenu *p=arg;
1069                 if (!vfd->vidioc_querymenu)
1070                         break;
1071                 ret=vfd->vidioc_querymenu(file, fh, p);
1072                 if (!ret)
1073                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1074                                                 p->id,p->index,p->name);
1075                 break;
1076         }
1077         /* --- audio ---------------------------------------------- */
1078         case VIDIOC_ENUMAUDIO:
1079         {
1080                 struct v4l2_audio *p=arg;
1081
1082                 if (!vfd->vidioc_enumaudio)
1083                         break;
1084                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1085                 ret=vfd->vidioc_enumaudio(file, fh, p);
1086                 if (!ret)
1087                         dbgarg2("index=%d, name=%s, capability=%d, "
1088                                         "mode=%d\n",p->index,p->name,
1089                                         p->capability, p->mode);
1090                 break;
1091         }
1092         case VIDIOC_G_AUDIO:
1093         {
1094                 struct v4l2_audio *p=arg;
1095                 __u32 index=p->index;
1096
1097                 if (!vfd->vidioc_g_audio)
1098                         break;
1099
1100                 memset(p,0,sizeof(*p));
1101                 p->index=index;
1102                 dbgarg(cmd, "Get for index=%d\n", p->index);
1103                 ret=vfd->vidioc_g_audio(file, fh, p);
1104                 if (!ret)
1105                         dbgarg2("index=%d, name=%s, capability=%d, "
1106                                         "mode=%d\n",p->index,
1107                                         p->name,p->capability, p->mode);
1108                 break;
1109         }
1110         case VIDIOC_S_AUDIO:
1111         {
1112                 struct v4l2_audio *p=arg;
1113
1114                 if (!vfd->vidioc_s_audio)
1115                         break;
1116                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1117                                         "mode=%d\n", p->index, p->name,
1118                                         p->capability, p->mode);
1119                 ret=vfd->vidioc_s_audio(file, fh, p);
1120                 break;
1121         }
1122         case VIDIOC_ENUMAUDOUT:
1123         {
1124                 struct v4l2_audioout *p=arg;
1125
1126                 if (!vfd->vidioc_enumaudout)
1127                         break;
1128                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1129                 ret=vfd->vidioc_enumaudout(file, fh, p);
1130                 if (!ret)
1131                         dbgarg2("index=%d, name=%s, capability=%d, "
1132                                         "mode=%d\n", p->index, p->name,
1133                                         p->capability,p->mode);
1134                 break;
1135         }
1136         case VIDIOC_G_AUDOUT:
1137         {
1138                 struct v4l2_audioout *p=arg;
1139
1140                 if (!vfd->vidioc_g_audout)
1141                         break;
1142                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1143                 ret=vfd->vidioc_g_audout(file, fh, p);
1144                 if (!ret)
1145                         dbgarg2("index=%d, name=%s, capability=%d, "
1146                                         "mode=%d\n", p->index, p->name,
1147                                         p->capability,p->mode);
1148                 break;
1149         }
1150         case VIDIOC_S_AUDOUT:
1151         {
1152                 struct v4l2_audioout *p=arg;
1153
1154                 if (!vfd->vidioc_s_audout)
1155                         break;
1156                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1157                                         "mode=%d\n", p->index, p->name,
1158                                         p->capability,p->mode);
1159
1160                 ret=vfd->vidioc_s_audout(file, fh, p);
1161                 break;
1162         }
1163         case VIDIOC_G_MODULATOR:
1164         {
1165                 struct v4l2_modulator *p=arg;
1166                 if (!vfd->vidioc_g_modulator)
1167                         break;
1168                 ret=vfd->vidioc_g_modulator(file, fh, p);
1169                 if (!ret)
1170                         dbgarg(cmd, "index=%d, name=%s, "
1171                                         "capability=%d, rangelow=%d,"
1172                                         " rangehigh=%d, txsubchans=%d\n",
1173                                         p->index, p->name,p->capability,
1174                                         p->rangelow, p->rangehigh,
1175                                         p->txsubchans);
1176                 break;
1177         }
1178         case VIDIOC_S_MODULATOR:
1179         {
1180                 struct v4l2_modulator *p=arg;
1181                 if (!vfd->vidioc_s_modulator)
1182                         break;
1183                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1184                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1185                                 p->index, p->name,p->capability,p->rangelow,
1186                                 p->rangehigh,p->txsubchans);
1187                         ret=vfd->vidioc_s_modulator(file, fh, p);
1188                 break;
1189         }
1190         case VIDIOC_G_CROP:
1191         {
1192                 struct v4l2_crop *p=arg;
1193                 if (!vfd->vidioc_g_crop)
1194                         break;
1195                 ret=vfd->vidioc_g_crop(file, fh, p);
1196                 if (!ret) {
1197                         dbgarg(cmd, "type=%d\n", p->type);
1198                         dbgrect(vfd, "", &p->c);
1199                 }
1200                 break;
1201         }
1202         case VIDIOC_S_CROP:
1203         {
1204                 struct v4l2_crop *p=arg;
1205                 if (!vfd->vidioc_s_crop)
1206                         break;
1207                 dbgarg(cmd, "type=%d\n", p->type);
1208                 dbgrect(vfd, "", &p->c);
1209                 ret=vfd->vidioc_s_crop(file, fh, p);
1210                 break;
1211         }
1212         case VIDIOC_CROPCAP:
1213         {
1214                 struct v4l2_cropcap *p=arg;
1215                 /*FIXME: Should also show v4l2_fract pixelaspect */
1216                 if (!vfd->vidioc_cropcap)
1217                         break;
1218                 dbgarg(cmd, "type=%d\n", p->type);
1219                 dbgrect(vfd, "bounds ", &p->bounds);
1220                 dbgrect(vfd, "defrect ", &p->defrect);
1221                 ret=vfd->vidioc_cropcap(file, fh, p);
1222                 break;
1223         }
1224         case VIDIOC_G_MPEGCOMP:
1225         {
1226                 struct v4l2_mpeg_compression *p=arg;
1227
1228                 /*FIXME: Several fields not shown */
1229                 if (!vfd->vidioc_g_mpegcomp)
1230                         break;
1231                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1232                 if (!ret)
1233                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1234                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1235                                         "ps_size=%d, au_sample_rate=%d, "
1236                                         "au_pesid=%c, vi_frame_rate=%d, "
1237                                         "vi_frames_per_gop=%d, "
1238                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1239                                         p->ts_pid_pmt,p->ts_pid_audio,
1240                                         p->ts_pid_video,p->ts_pid_pcr,
1241                                         p->ps_size, p->au_sample_rate,
1242                                         p->au_pesid, p->vi_frame_rate,
1243                                         p->vi_frames_per_gop,
1244                                         p->vi_bframes_count, p->vi_pesid);
1245                 break;
1246         }
1247         case VIDIOC_S_MPEGCOMP:
1248         {
1249                 struct v4l2_mpeg_compression *p=arg;
1250                 /*FIXME: Several fields not shown */
1251                 if (!vfd->vidioc_s_mpegcomp)
1252                         break;
1253                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1254                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1255                                 "au_sample_rate=%d, au_pesid=%c, "
1256                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1257                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1258                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1259                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1260                                 p->au_pesid, p->vi_frame_rate,
1261                                 p->vi_frames_per_gop, p->vi_bframes_count,
1262                                 p->vi_pesid);
1263                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1264                 break;
1265         }
1266         case VIDIOC_G_JPEGCOMP:
1267         {
1268                 struct v4l2_jpegcompression *p=arg;
1269                 if (!vfd->vidioc_g_jpegcomp)
1270                         break;
1271                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1272                 if (!ret)
1273                         dbgarg (cmd, "quality=%d, APPn=%d, "
1274                                                 "APP_len=%d, COM_len=%d, "
1275                                                 "jpeg_markers=%d\n",
1276                                                 p->quality,p->APPn,p->APP_len,
1277                                                 p->COM_len,p->jpeg_markers);
1278                 break;
1279         }
1280         case VIDIOC_S_JPEGCOMP:
1281         {
1282                 struct v4l2_jpegcompression *p=arg;
1283                 if (!vfd->vidioc_g_jpegcomp)
1284                         break;
1285                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1286                                         "COM_len=%d, jpeg_markers=%d\n",
1287                                         p->quality,p->APPn,p->APP_len,
1288                                         p->COM_len,p->jpeg_markers);
1289                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1290                 break;
1291         }
1292         case VIDIOC_G_PARM:
1293         {
1294                 struct v4l2_streamparm *p=arg;
1295                 if (vfd->vidioc_g_parm) {
1296                         ret=vfd->vidioc_g_parm(file, fh, p);
1297                 } else {
1298                         struct v4l2_standard s;
1299                         int i;
1300
1301                         if (!vfd->tvnormsize) {
1302                                 printk (KERN_WARNING "%s: no TV norms defined!\n",
1303                                                         vfd->name);
1304                                 break;
1305                         }
1306
1307                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1308                                 return -EINVAL;
1309
1310                         for (i = 0; i < vfd->tvnormsize; i++)
1311                                 if (vfd->tvnorms[i].id == vfd->current_norm)
1312                                         break;
1313                         if (i >= vfd->tvnormsize)
1314                                 return -EINVAL;
1315
1316                         v4l2_video_std_construct(&s, vfd->current_norm,
1317                                                  vfd->tvnorms[i].name);
1318
1319                         memset(p,0,sizeof(*p));
1320
1321                         p->parm.capture.timeperframe = s.frameperiod;
1322                         ret=0;
1323                 }
1324
1325                 dbgarg (cmd, "type=%d\n", p->type);
1326                 break;
1327         }
1328         case VIDIOC_S_PARM:
1329         {
1330                 struct v4l2_streamparm *p=arg;
1331                 if (!vfd->vidioc_s_parm)
1332                         break;
1333                 dbgarg (cmd, "type=%d\n", p->type);
1334                 ret=vfd->vidioc_s_parm(file, fh, p);
1335                 break;
1336         }
1337         case VIDIOC_G_TUNER:
1338         {
1339                 struct v4l2_tuner *p=arg;
1340                 __u32 index=p->index;
1341
1342                 if (!vfd->vidioc_g_tuner)
1343                         break;
1344
1345                 memset(p,0,sizeof(*p));
1346                 p->index=index;
1347
1348                 ret=vfd->vidioc_g_tuner(file, fh, p);
1349                 if (!ret)
1350                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1351                                         "capability=%d, rangelow=%d, "
1352                                         "rangehigh=%d, signal=%d, afc=%d, "
1353                                         "rxsubchans=%d, audmode=%d\n",
1354                                         p->index, p->name, p->type,
1355                                         p->capability, p->rangelow,
1356                                         p->rangehigh, p->rxsubchans,
1357                                         p->audmode, p->signal, p->afc);
1358                 break;
1359         }
1360         case VIDIOC_S_TUNER:
1361         {
1362                 struct v4l2_tuner *p=arg;
1363                 if (!vfd->vidioc_s_tuner)
1364                         break;
1365                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1366                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1367                                 "signal=%d, afc=%d, rxsubchans=%d, "
1368                                 "audmode=%d\n",p->index, p->name, p->type,
1369                                 p->capability, p->rangelow,p->rangehigh,
1370                                 p->rxsubchans, p->audmode, p->signal,
1371                                 p->afc);
1372                 ret=vfd->vidioc_s_tuner(file, fh, p);
1373                 break;
1374         }
1375         case VIDIOC_G_FREQUENCY:
1376         {
1377                 struct v4l2_frequency *p=arg;
1378                 if (!vfd->vidioc_g_frequency)
1379                         break;
1380
1381                 memset(p,0,sizeof(*p));
1382
1383                 ret=vfd->vidioc_g_frequency(file, fh, p);
1384                 if (!ret)
1385                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1386                                                 p->tuner,p->type,p->frequency);
1387                 break;
1388         }
1389         case VIDIOC_S_FREQUENCY:
1390         {
1391                 struct v4l2_frequency *p=arg;
1392                 if (!vfd->vidioc_s_frequency)
1393                         break;
1394                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1395                                 p->tuner,p->type,p->frequency);
1396                 ret=vfd->vidioc_s_frequency(file, fh, p);
1397                 break;
1398         }
1399         case VIDIOC_G_SLICED_VBI_CAP:
1400         {
1401                 struct v4l2_sliced_vbi_cap *p=arg;
1402                 if (!vfd->vidioc_g_sliced_vbi_cap)
1403                         break;
1404                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1405                 if (!ret)
1406                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1407                 break;
1408         }
1409         case VIDIOC_LOG_STATUS:
1410         {
1411                 if (!vfd->vidioc_log_status)
1412                         break;
1413                 ret=vfd->vidioc_log_status(file, fh);
1414                 break;
1415         }
1416         } /* switch */
1417
1418         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1419                 if (ret<0) {
1420                         printk ("%s: err:\n", vfd->name);
1421                         v4l_print_ioctl(vfd->name, cmd);
1422                 }
1423         }
1424
1425         return ret;
1426 }
1427
1428 int video_ioctl2 (struct inode *inode, struct file *file,
1429                unsigned int cmd, unsigned long arg)
1430 {
1431         char    sbuf[128];
1432         void    *mbuf = NULL;
1433         void    *parg = NULL;
1434         int     err  = -EINVAL;
1435         int     is_ext_ctrl;
1436         size_t  ctrls_size = 0;
1437         void __user *user_ptr = NULL;
1438
1439 #ifdef __OLD_VIDIOC_
1440         cmd = video_fix_command(cmd);
1441 #endif
1442         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1443                        cmd == VIDIOC_TRY_EXT_CTRLS);
1444
1445         /*  Copy arguments into temp kernel buffer  */
1446         switch (_IOC_DIR(cmd)) {
1447         case _IOC_NONE:
1448                 parg = NULL;
1449                 break;
1450         case _IOC_READ:
1451         case _IOC_WRITE:
1452         case (_IOC_WRITE | _IOC_READ):
1453                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1454                         parg = sbuf;
1455                 } else {
1456                         /* too big to allocate from stack */
1457                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1458                         if (NULL == mbuf)
1459                                 return -ENOMEM;
1460                         parg = mbuf;
1461                 }
1462
1463                 err = -EFAULT;
1464                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1465                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1466                                 goto out;
1467                 break;
1468         }
1469
1470         if (is_ext_ctrl) {
1471                 struct v4l2_ext_controls *p = parg;
1472
1473                 /* In case of an error, tell the caller that it wasn't
1474                    a specific control that caused it. */
1475                 p->error_idx = p->count;
1476                 user_ptr = (void __user *)p->controls;
1477                 if (p->count) {
1478                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1479                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1480                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1481                         err = -ENOMEM;
1482                         if (NULL == mbuf)
1483                                 goto out_ext_ctrl;
1484                         err = -EFAULT;
1485                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1486                                 goto out_ext_ctrl;
1487                         p->controls = mbuf;
1488                 }
1489         }
1490
1491         /* Handles IOCTL */
1492         err = __video_do_ioctl(inode, file, cmd, parg);
1493         if (err == -ENOIOCTLCMD)
1494                 err = -EINVAL;
1495         if (is_ext_ctrl) {
1496                 struct v4l2_ext_controls *p = parg;
1497
1498                 p->controls = (void *)user_ptr;
1499                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1500                         err = -EFAULT;
1501                 goto out_ext_ctrl;
1502         }
1503         if (err < 0)
1504                 goto out;
1505
1506 out_ext_ctrl:
1507         /*  Copy results into user buffer  */
1508         switch (_IOC_DIR(cmd))
1509         {
1510         case _IOC_READ:
1511         case (_IOC_WRITE | _IOC_READ):
1512                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1513                         err = -EFAULT;
1514                 break;
1515         }
1516
1517 out:
1518         kfree(mbuf);
1519         return err;
1520 }
1521
1522
1523 static struct file_operations video_fops;
1524
1525 /**
1526  *      video_register_device - register video4linux devices
1527  *      @vfd:  video device structure we want to register
1528  *      @type: type of device to register
1529  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1530  *             -1 == first free)
1531  *
1532  *      The registration code assigns minor numbers based on the type
1533  *      requested. -ENFILE is returned in all the device slots for this
1534  *      category are full. If not then the minor field is set and the
1535  *      driver initialize function is called (if non %NULL).
1536  *
1537  *      Zero is returned on success.
1538  *
1539  *      Valid types are
1540  *
1541  *      %VFL_TYPE_GRABBER - A frame grabber
1542  *
1543  *      %VFL_TYPE_VTX - A teletext device
1544  *
1545  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1546  *
1547  *      %VFL_TYPE_RADIO - A radio card
1548  */
1549
1550 int video_register_device(struct video_device *vfd, int type, int nr)
1551 {
1552         int i=0;
1553         int base;
1554         int end;
1555         int ret;
1556         char *name_base;
1557
1558         switch(type)
1559         {
1560                 case VFL_TYPE_GRABBER:
1561                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1562                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1563                         name_base = "video";
1564                         break;
1565                 case VFL_TYPE_VTX:
1566                         base=MINOR_VFL_TYPE_VTX_MIN;
1567                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1568                         name_base = "vtx";
1569                         break;
1570                 case VFL_TYPE_VBI:
1571                         base=MINOR_VFL_TYPE_VBI_MIN;
1572                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1573                         name_base = "vbi";
1574                         break;
1575                 case VFL_TYPE_RADIO:
1576                         base=MINOR_VFL_TYPE_RADIO_MIN;
1577                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1578                         name_base = "radio";
1579                         break;
1580                 default:
1581                         printk(KERN_ERR "%s called with unknown type: %d\n",
1582                                __FUNCTION__, type);
1583                         return -1;
1584         }
1585
1586         /* pick a minor number */
1587         mutex_lock(&videodev_lock);
1588         if (nr >= 0  &&  nr < end-base) {
1589                 /* use the one the driver asked for */
1590                 i = base+nr;
1591                 if (NULL != video_device[i]) {
1592                         mutex_unlock(&videodev_lock);
1593                         return -ENFILE;
1594                 }
1595         } else {
1596                 /* use first free */
1597                 for(i=base;i<end;i++)
1598                         if (NULL == video_device[i])
1599                                 break;
1600                 if (i == end) {
1601                         mutex_unlock(&videodev_lock);
1602                         return -ENFILE;
1603                 }
1604         }
1605         video_device[i]=vfd;
1606         vfd->minor=i;
1607         mutex_unlock(&videodev_lock);
1608         mutex_init(&vfd->lock);
1609
1610         /* sysfs class */
1611         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1612         if (vfd->dev)
1613                 vfd->class_dev.dev = vfd->dev;
1614         vfd->class_dev.class       = &video_class;
1615         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1616         sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
1617         ret = class_device_register(&vfd->class_dev);
1618         if (ret < 0) {
1619                 printk(KERN_ERR "%s: class_device_register failed\n",
1620                        __FUNCTION__);
1621                 goto fail_minor;
1622         }
1623         ret = class_device_create_file(&vfd->class_dev, &class_device_attr_name);
1624         if (ret < 0) {
1625                 printk(KERN_ERR "%s: class_device_create_file 'name' failed\n",
1626                        __FUNCTION__);
1627                 goto fail_classdev;
1628         }
1629
1630 #if 1
1631         /* needed until all drivers are fixed */
1632         if (!vfd->release)
1633                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1634                        "Please fix your driver for proper sysfs support, see "
1635                        "http://lwn.net/Articles/36850/\n", vfd->name);
1636 #endif
1637         return 0;
1638
1639 fail_classdev:
1640         class_device_unregister(&vfd->class_dev);
1641 fail_minor:
1642         mutex_lock(&videodev_lock);
1643         video_device[vfd->minor] = NULL;
1644         vfd->minor = -1;
1645         mutex_unlock(&videodev_lock);
1646         return ret;
1647 }
1648
1649 /**
1650  *      video_unregister_device - unregister a video4linux device
1651  *      @vfd: the device to unregister
1652  *
1653  *      This unregisters the passed device and deassigns the minor
1654  *      number. Future open calls will be met with errors.
1655  */
1656
1657 void video_unregister_device(struct video_device *vfd)
1658 {
1659         mutex_lock(&videodev_lock);
1660         if(video_device[vfd->minor]!=vfd)
1661                 panic("videodev: bad unregister");
1662
1663         video_device[vfd->minor]=NULL;
1664         class_device_unregister(&vfd->class_dev);
1665         mutex_unlock(&videodev_lock);
1666 }
1667
1668 /*
1669  * Video fs operations
1670  */
1671 static struct file_operations video_fops=
1672 {
1673         .owner          = THIS_MODULE,
1674         .llseek         = no_llseek,
1675         .open           = video_open,
1676 };
1677
1678 /*
1679  *      Initialise video for linux
1680  */
1681
1682 static int __init videodev_init(void)
1683 {
1684         int ret;
1685
1686         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1687         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1688                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1689                 return -EIO;
1690         }
1691
1692         ret = class_register(&video_class);
1693         if (ret < 0) {
1694                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1695                 printk(KERN_WARNING "video_dev: class_register failed\n");
1696                 return -EIO;
1697         }
1698
1699         return 0;
1700 }
1701
1702 static void __exit videodev_exit(void)
1703 {
1704         class_unregister(&video_class);
1705         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1706 }
1707
1708 module_init(videodev_init)
1709 module_exit(videodev_exit)
1710
1711 EXPORT_SYMBOL(video_register_device);
1712 EXPORT_SYMBOL(video_unregister_device);
1713 EXPORT_SYMBOL(video_devdata);
1714 EXPORT_SYMBOL(video_usercopy);
1715 EXPORT_SYMBOL(video_exclusive_open);
1716 EXPORT_SYMBOL(video_exclusive_release);
1717 EXPORT_SYMBOL(video_ioctl2);
1718 EXPORT_SYMBOL(video_device_alloc);
1719 EXPORT_SYMBOL(video_device_release);
1720
1721 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1722 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1723 MODULE_LICENSE("GPL");
1724
1725
1726 /*
1727  * Local variables:
1728  * c-basic-offset: 8
1729  * End:
1730  */