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/smp_lock.h>
  34 #include <linux/mm.h>
  35 #include <linux/string.h>
  36 #include <linux/errno.h>
  37 #include <linux/init.h>
  38 #include <linux/kmod.h>
  39 #include <linux/slab.h>
  40 #include <asm/uaccess.h>
  41 #include <asm/system.h>
  42
  43 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
  44 #include <linux/videodev2.h>
  45
  46 #ifdef CONFIG_VIDEO_V4L1
  47 #include <linux/videodev.h>
  48 #endif
  49 #include <media/v4l2-common.h>
  50
  51 #define VIDEO_NUM_DEVICES       256
  52 #define VIDEO_NAME              "video4linux"
  53
  54 /*
  55  *      sysfs stuff
  56  */
  57
  58 static ssize_t show_name(struct class_device *cd, char *buf)
  59 {
  60         struct video_device *vfd = container_of(cd, struct video_device,
  61                                                                 class_dev);
  62         return sprintf(buf,"%.*s\n",(int)sizeof(vfd->name),vfd->name);
  63 }
  64
  65 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  66
  67 struct video_device *video_device_alloc(void)
  68 {
  69         struct video_device *vfd;
  70
  71         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
  72         return vfd;
  73 }
  74
  75 void video_device_release(struct video_device *vfd)
  76 {
  77         kfree(vfd);
  78 }
  79
  80 static void video_release(struct class_device *cd)
  81 {
  82         struct video_device *vfd = container_of(cd, struct video_device,
  83                                                                 class_dev);
  84
  85 #if 1
  86         /* needed until all drivers are fixed */
  87         if (!vfd->release)
  88                 return;
  89 #endif
  90         vfd->release(vfd);
  91 }
  92
  93 static struct class video_class = {
  94         .name    = VIDEO_NAME,
  95         .release = video_release,
  96 };
  97
  98 /*
  99  *      Active devices
 100  */
 101
 102 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 103 static DEFINE_MUTEX(videodev_lock);
 104
 105 struct video_device* video_devdata(struct file *file)
 106 {
 107         return video_device[iminor(file->f_path.dentry->d_inode)];
 108 }
 109
 110 /*
 111  *      Open a video device - FIXME: Obsoleted
 112  */
 113 static int video_open(struct inode *inode, struct file *file)
 114 {
 115         unsigned int minor = iminor(inode);
 116         int err = 0;
 117         struct video_device *vfl;
 118         const struct file_operations *old_fops;
 119
 120         if(minor>=VIDEO_NUM_DEVICES)
 121                 return -ENODEV;
 122         mutex_lock(&videodev_lock);
 123         vfl=video_device[minor];
 124         if(vfl==NULL) {
 125                 mutex_unlock(&videodev_lock);
 126                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 127                 mutex_lock(&videodev_lock);
 128                 vfl=video_device[minor];
 129                 if (vfl==NULL) {
 130                         mutex_unlock(&videodev_lock);
 131                         return -ENODEV;
 132                 }
 133         }
 134         old_fops = file->f_op;
 135         file->f_op = fops_get(vfl->fops);
 136         if(file->f_op->open)
 137                 err = file->f_op->open(inode,file);
 138         if (err) {
 139                 fops_put(file->f_op);
 140                 file->f_op = fops_get(old_fops);
 141         }
 142         fops_put(old_fops);
 143         mutex_unlock(&videodev_lock);
 144         return err;
 145 }
 146
 147 /*
 148  * helper function -- handles userspace copying for ioctl arguments
 149  */
 150
 151 #ifdef __OLD_VIDIOC_
 152 static unsigned int
 153 video_fix_command(unsigned int cmd)
 154 {
 155         switch (cmd) {
 156         case VIDIOC_OVERLAY_OLD:
 157                 cmd = VIDIOC_OVERLAY;
 158                 break;
 159         case VIDIOC_S_PARM_OLD:
 160                 cmd = VIDIOC_S_PARM;
 161                 break;
 162         case VIDIOC_S_CTRL_OLD:
 163                 cmd = VIDIOC_S_CTRL;
 164                 break;
 165         case VIDIOC_G_AUDIO_OLD:
 166                 cmd = VIDIOC_G_AUDIO;
 167                 break;
 168         case VIDIOC_G_AUDOUT_OLD:
 169                 cmd = VIDIOC_G_AUDOUT;
 170                 break;
 171         case VIDIOC_CROPCAP_OLD:
 172                 cmd = VIDIOC_CROPCAP;
 173                 break;
 174         }
 175         return cmd;
 176 }
 177 #endif
 178
 179 /*
 180  * Obsolete usercopy function - Should be removed soon
 181  */
 182 int
 183 video_usercopy(struct inode *inode, struct file *file,
 184                unsigned int cmd, unsigned long arg,
 185                int (*func)(struct inode *inode, struct file *file,
 186                            unsigned int cmd, void *arg))
 187 {
 188         char    sbuf[128];
 189         void    *mbuf = NULL;
 190         void    *parg = NULL;
 191         int     err  = -EINVAL;
 192         int     is_ext_ctrl;
 193         size_t  ctrls_size = 0;
 194         void __user *user_ptr = NULL;
 195
 196 #ifdef __OLD_VIDIOC_
 197         cmd = video_fix_command(cmd);
 198 #endif
 199         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 200                        cmd == VIDIOC_TRY_EXT_CTRLS);
 201
 202         /*  Copy arguments into temp kernel buffer  */
 203         switch (_IOC_DIR(cmd)) {
 204         case _IOC_NONE:
 205                 parg = NULL;
 206                 break;
 207         case _IOC_READ:
 208         case _IOC_WRITE:
 209         case (_IOC_WRITE | _IOC_READ):
 210                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 211                         parg = sbuf;
 212                 } else {
 213                         /* too big to allocate from stack */
 214                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 215                         if (NULL == mbuf)
 216                                 return -ENOMEM;
 217                         parg = mbuf;
 218                 }
 219
 220                 err = -EFAULT;
 221                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 222                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 223                                 goto out;
 224                 break;
 225         }
 226         if (is_ext_ctrl) {
 227                 struct v4l2_ext_controls *p = parg;
 228
 229                 /* In case of an error, tell the caller that it wasn't
 230                    a specific control that caused it. */
 231                 p->error_idx = p->count;
 232                 user_ptr = (void __user *)p->controls;
 233                 if (p->count) {
 234                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 235                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 236                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 237                         err = -ENOMEM;
 238                         if (NULL == mbuf)
 239                                 goto out_ext_ctrl;
 240                         err = -EFAULT;
 241                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 242                                 goto out_ext_ctrl;
 243                         p->controls = mbuf;
 244                 }
 245         }
 246
 247         /* call driver */
 248         err = func(inode, file, cmd, parg);
 249         if (err == -ENOIOCTLCMD)
 250                 err = -EINVAL;
 251         if (is_ext_ctrl) {
 252                 struct v4l2_ext_controls *p = parg;
 253
 254                 p->controls = (void *)user_ptr;
 255                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 256                         err = -EFAULT;
 257                 goto out_ext_ctrl;
 258         }
 259         if (err < 0)
 260                 goto out;
 261
 262 out_ext_ctrl:
 263         /*  Copy results into user buffer  */
 264         switch (_IOC_DIR(cmd))
 265         {
 266         case _IOC_READ:
 267         case (_IOC_WRITE | _IOC_READ):
 268                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 269                         err = -EFAULT;
 270                 break;
 271         }
 272
 273 out:
 274         kfree(mbuf);
 275         return err;
 276 }
 277
 278 /*
 279  * open/release helper functions -- handle exclusive opens
 280  * Should be removed soon
 281  */
 282 int video_exclusive_open(struct inode *inode, struct file *file)
 283 {
 284         struct  video_device *vfl = video_devdata(file);
 285         int retval = 0;
 286
 287         mutex_lock(&vfl->lock);
 288         if (vfl->users) {
 289                 retval = -EBUSY;
 290         } else {
 291                 vfl->users++;
 292         }
 293         mutex_unlock(&vfl->lock);
 294         return retval;
 295 }
 296
 297 int video_exclusive_release(struct inode *inode, struct file *file)
 298 {
 299         struct  video_device *vfl = video_devdata(file);
 300
 301         vfl->users--;
 302         return 0;
 303 }
 304
 305 static char *v4l2_memory_names[] = {
 306         [V4L2_MEMORY_MMAP]    = "mmap",
 307         [V4L2_MEMORY_USERPTR] = "userptr",
 308         [V4L2_MEMORY_OVERLAY] = "overlay",
 309 };
 310
 311
 312 /* FIXME: Those stuff are replicated also on v4l2-common.c */
 313 static char *v4l2_type_names_FIXME[] = {
 314         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
 315         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
 316         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
 317         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 318         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 319         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 320         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
 321         [V4L2_BUF_TYPE_PRIVATE]            = "private",
 322 };
 323
 324 static char *v4l2_field_names_FIXME[] = {
 325         [V4L2_FIELD_ANY]        = "any",
 326         [V4L2_FIELD_NONE]       = "none",
 327         [V4L2_FIELD_TOP]        = "top",
 328         [V4L2_FIELD_BOTTOM]     = "bottom",
 329         [V4L2_FIELD_INTERLACED] = "interlaced",
 330         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 331         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 332         [V4L2_FIELD_ALTERNATE]  = "alternate",
 333 };
 334
 335 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
 336
 337 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 338                                         struct v4l2_buffer *p)
 339 {
 340         struct v4l2_timecode *tc=&p->timecode;
 341
 342         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 343                 "bytesused=%d, flags=0x%08d, "
 344                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 345                         (p->timestamp.tv_sec/3600),
 346                         (int)(p->timestamp.tv_sec/60)%60,
 347                         (int)(p->timestamp.tv_sec%60),
 348                         p->timestamp.tv_usec,
 349                         p->index,
 350                         prt_names(p->type,v4l2_type_names_FIXME),
 351                         p->bytesused,p->flags,
 352                         p->field,p->sequence,
 353                         prt_names(p->memory,v4l2_memory_names),
 354                         p->m.userptr, p->length);
 355         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
 356                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 357                         tc->hours,tc->minutes,tc->seconds,
 358                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 359 }
 360
 361 static inline void dbgrect(struct video_device *vfd, char *s,
 362                                                         struct v4l2_rect *r)
 363 {
 364         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
 365                                                 r->width, r->height);
 366 };
 367
 368 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 369                                                 struct v4l2_pix_format *fmt)
 370 {
 371         dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 372                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 373                 fmt->width,fmt->height,
 374                 (fmt->pixelformat & 0xff),
 375                 (fmt->pixelformat >>  8) & 0xff,
 376                 (fmt->pixelformat >> 16) & 0xff,
 377                 (fmt->pixelformat >> 24) & 0xff,
 378                 prt_names(fmt->field,v4l2_field_names_FIXME),
 379                 fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
 380 };
 381
 382
 383 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 384 {
 385         switch (type) {
 386         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 387                 if (vfd->vidioc_try_fmt_cap)
 388                         return (0);
 389                 break;
 390         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 391                 if (vfd->vidioc_try_fmt_overlay)
 392                         return (0);
 393                 break;
 394         case V4L2_BUF_TYPE_VBI_CAPTURE:
 395                 if (vfd->vidioc_try_fmt_vbi)
 396                         return (0);
 397                 break;
 398         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 399                 if (vfd->vidioc_try_fmt_vbi_output)
 400                         return (0);
 401                 break;
 402         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 403                 if (vfd->vidioc_try_fmt_vbi_capture)
 404                         return (0);
 405                 break;
 406         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 407                 if (vfd->vidioc_try_fmt_video_output)
 408                         return (0);
 409                 break;
 410         case V4L2_BUF_TYPE_VBI_OUTPUT:
 411                 if (vfd->vidioc_try_fmt_vbi_output)
 412                         return (0);
 413                 break;
 414         case V4L2_BUF_TYPE_PRIVATE:
 415                 if (vfd->vidioc_try_fmt_type_private)
 416                         return (0);
 417                 break;
 418         }
 419         return (-EINVAL);
 420 }
 421
 422 static int __video_do_ioctl(struct inode *inode, struct file *file,
 423                 unsigned int cmd, void *arg)
 424 {
 425         struct video_device *vfd = video_devdata(file);
 426         void                 *fh = file->private_data;
 427         int                  ret = -EINVAL;
 428
 429         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 430                                 !(vfd->debug | V4L2_DEBUG_IOCTL_ARG)) {
 431                 v4l_print_ioctl(vfd->name, cmd);
 432         }
 433
 434         if (_IOC_TYPE(cmd)=='v')
 435                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 436                                                 __video_do_ioctl);
 437
 438         switch(cmd) {
 439         /* --- capabilities ------------------------------------------ */
 440         case VIDIOC_QUERYCAP:
 441         {
 442                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 443                 memset(cap, 0, sizeof(*cap));
 444
 445                 if (!vfd->vidioc_querycap)
 446                         break;
 447
 448                 ret=vfd->vidioc_querycap(file, fh, cap);
 449                 if (!ret)
 450                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 451                                         "version=0x%08x, "
 452                                         "capabilities=0x%08x\n",
 453                                         cap->driver,cap->card,cap->bus_info,
 454                                         cap->version,
 455                                         cap->capabilities);
 456                 break;
 457         }
 458
 459         /* --- priority ------------------------------------------ */
 460         case VIDIOC_G_PRIORITY:
 461         {
 462                 enum v4l2_priority *p=arg;
 463
 464                 if (!vfd->vidioc_g_priority)
 465                         break;
 466                 ret=vfd->vidioc_g_priority(file, fh, p);
 467                 if (!ret)
 468                         dbgarg(cmd, "priority is %d\n", *p);
 469                 break;
 470         }
 471         case VIDIOC_S_PRIORITY:
 472         {
 473                 enum v4l2_priority *p=arg;
 474
 475                 if (!vfd->vidioc_s_priority)
 476                         break;
 477                 dbgarg(cmd, "setting priority to %d\n", *p);
 478                 ret=vfd->vidioc_s_priority(file, fh, *p);
 479                 break;
 480         }
 481
 482         /* --- capture ioctls ---------------------------------------- */
 483         case VIDIOC_ENUM_FMT:
 484         {
 485                 struct v4l2_fmtdesc *f = arg;
 486                 enum v4l2_buf_type type;
 487                 unsigned int index;
 488
 489                 index = f->index;
 490                 type  = f->type;
 491                 memset(f,0,sizeof(*f));
 492                 f->index = index;
 493                 f->type  = type;
 494
 495                 switch (type) {
 496                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 497                         if (vfd->vidioc_enum_fmt_cap)
 498                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 499                         break;
 500                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 501                         if (vfd->vidioc_enum_fmt_overlay)
 502                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 503                         break;
 504                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 505                         if (vfd->vidioc_enum_fmt_vbi)
 506                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 507                         break;
 508                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 509                         if (vfd->vidioc_enum_fmt_vbi_output)
 510                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 511                                                                 fh, f);
 512                         break;
 513                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 514                         if (vfd->vidioc_enum_fmt_vbi_capture)
 515                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 516                                                                 fh, f);
 517                         break;
 518                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 519                         if (vfd->vidioc_enum_fmt_video_output)
 520                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 521                                                                 fh, f);
 522                         break;
 523                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 524                         if (vfd->vidioc_enum_fmt_vbi_output)
 525                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 526                                                                 fh, f);
 527                         break;
 528                 case V4L2_BUF_TYPE_PRIVATE:
 529                         if (vfd->vidioc_enum_fmt_type_private)
 530                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 531                                                                 fh, f);
 532                         break;
 533                 }
 534                 if (!ret)
 535                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 536                                         "pixelformat=%c%c%c%c, description='%s'\n",
 537                                         f->index, f->type, f->flags,
 538                                         (f->pixelformat & 0xff),
 539                                         (f->pixelformat >>  8) & 0xff,
 540                                         (f->pixelformat >> 16) & 0xff,
 541                                         (f->pixelformat >> 24) & 0xff,
 542                                         f->description);
 543                 break;
 544         }
 545         case VIDIOC_G_FMT:
 546         {
 547                 struct v4l2_format *f = (struct v4l2_format *)arg;
 548                 enum v4l2_buf_type type=f->type;
 549
 550                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 551                 f->type=type;
 552
 553                 /* FIXME: Should be one dump per type */
 554                 dbgarg (cmd, "type=%s\n", prt_names(type,
 555                                         v4l2_type_names_FIXME));
 556
 557                 switch (type) {
 558                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 559                         if (vfd->vidioc_g_fmt_cap)
 560                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 561                         if (!ret)
 562                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 563                         break;
 564                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 565                         if (vfd->vidioc_g_fmt_overlay)
 566                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 567                         break;
 568                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 569                         if (vfd->vidioc_g_fmt_vbi)
 570                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 571                         break;
 572                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 573                         if (vfd->vidioc_g_fmt_vbi_output)
 574                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 575                         break;
 576                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 577                         if (vfd->vidioc_g_fmt_vbi_capture)
 578                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 579                         break;
 580                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 581                         if (vfd->vidioc_g_fmt_video_output)
 582                                 ret=vfd->vidioc_g_fmt_video_output(file,
 583                                                                 fh, f);
 584                         break;
 585                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 586                         if (vfd->vidioc_g_fmt_vbi_output)
 587                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 588                         break;
 589                 case V4L2_BUF_TYPE_PRIVATE:
 590                         if (vfd->vidioc_g_fmt_type_private)
 591                                 ret=vfd->vidioc_g_fmt_type_private(file,
 592                                                                 fh, f);
 593                         break;
 594                 }
 595
 596                 break;
 597         }
 598         case VIDIOC_S_FMT:
 599         {
 600                 struct v4l2_format *f = (struct v4l2_format *)arg;
 601
 602                 /* FIXME: Should be one dump per type */
 603                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 604                                         v4l2_type_names_FIXME));
 605
 606                 switch (f->type) {
 607                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 608                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 609                         if (vfd->vidioc_s_fmt_cap)
 610                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 611                         break;
 612                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 613                         if (vfd->vidioc_s_fmt_overlay)
 614                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 615                         break;
 616                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 617                         if (vfd->vidioc_s_fmt_vbi)
 618                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 619                         break;
 620                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 621                         if (vfd->vidioc_s_fmt_vbi_output)
 622                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 623                         break;
 624                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 625                         if (vfd->vidioc_s_fmt_vbi_capture)
 626                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 627                         break;
 628                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 629                         if (vfd->vidioc_s_fmt_video_output)
 630                                 ret=vfd->vidioc_s_fmt_video_output(file,
 631                                                                 fh, f);
 632                         break;
 633                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 634                         if (vfd->vidioc_s_fmt_vbi_output)
 635                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 636                                                                 fh, f);
 637                         break;
 638                 case V4L2_BUF_TYPE_PRIVATE:
 639                         if (vfd->vidioc_s_fmt_type_private)
 640                                 ret=vfd->vidioc_s_fmt_type_private(file,
 641                                                                 fh, f);
 642                         break;
 643                 }
 644                 break;
 645         }
 646         case VIDIOC_TRY_FMT:
 647         {
 648                 struct v4l2_format *f = (struct v4l2_format *)arg;
 649
 650                 /* FIXME: Should be one dump per type */
 651                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 652                                                 v4l2_type_names_FIXME));
 653                 switch (f->type) {
 654                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 655                         if (vfd->vidioc_try_fmt_cap)
 656                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 657                         if (!ret)
 658                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 659                         break;
 660                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 661                         if (vfd->vidioc_try_fmt_overlay)
 662                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 663                         break;
 664                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 665                         if (vfd->vidioc_try_fmt_vbi)
 666                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 667                         break;
 668                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 669                         if (vfd->vidioc_try_fmt_vbi_output)
 670                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 671                                                                 fh, f);
 672                         break;
 673                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 674                         if (vfd->vidioc_try_fmt_vbi_capture)
 675                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 676                                                                 fh, f);
 677                         break;
 678                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 679                         if (vfd->vidioc_try_fmt_video_output)
 680                                 ret=vfd->vidioc_try_fmt_video_output(file,
 681                                                                 fh, f);
 682                         break;
 683                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 684                         if (vfd->vidioc_try_fmt_vbi_output)
 685                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 686                                                                 fh, f);
 687                         break;
 688                 case V4L2_BUF_TYPE_PRIVATE:
 689                         if (vfd->vidioc_try_fmt_type_private)
 690                                 ret=vfd->vidioc_try_fmt_type_private(file,
 691                                                                 fh, f);
 692                         break;
 693                 }
 694
 695                 break;
 696         }
 697         /* FIXME: Those buf reqs could be handled here,
 698            with some changes on videobuf to allow its header to be included at
 699            videodev2.h or being merged at videodev2.
 700          */
 701         case VIDIOC_REQBUFS:
 702         {
 703                 struct v4l2_requestbuffers *p=arg;
 704
 705                 if (!vfd->vidioc_reqbufs)
 706                         break;
 707                 ret = check_fmt (vfd, p->type);
 708                 if (ret)
 709                         break;
 710
 711                 ret=vfd->vidioc_reqbufs(file, fh, p);
 712                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 713                                 p->count,
 714                                 prt_names(p->type,v4l2_type_names_FIXME),
 715                                 prt_names(p->memory,v4l2_memory_names));
 716                 break;
 717         }
 718         case VIDIOC_QUERYBUF:
 719         {
 720                 struct v4l2_buffer *p=arg;
 721
 722                 if (!vfd->vidioc_querybuf)
 723                         break;
 724                 ret = check_fmt (vfd, p->type);
 725                 if (ret)
 726                         break;
 727
 728                 ret=vfd->vidioc_querybuf(file, fh, p);
 729                 if (!ret)
 730                         dbgbuf(cmd,vfd,p);
 731                 break;
 732         }
 733         case VIDIOC_QBUF:
 734         {
 735                 struct v4l2_buffer *p=arg;
 736
 737                 if (!vfd->vidioc_qbuf)
 738                         break;
 739                 ret = check_fmt (vfd, p->type);
 740                 if (ret)
 741                         break;
 742
 743                 ret=vfd->vidioc_qbuf(file, fh, p);
 744                 if (!ret)
 745                         dbgbuf(cmd,vfd,p);
 746                 break;
 747         }
 748         case VIDIOC_DQBUF:
 749         {
 750                 struct v4l2_buffer *p=arg;
 751                 if (!vfd->vidioc_dqbuf)
 752                         break;
 753                 ret = check_fmt (vfd, p->type);
 754                 if (ret)
 755                         break;
 756
 757                 ret=vfd->vidioc_dqbuf(file, fh, p);
 758                 if (!ret)
 759                         dbgbuf(cmd,vfd,p);
 760                 break;
 761         }
 762         case VIDIOC_OVERLAY:
 763         {
 764                 int *i = arg;
 765
 766                 if (!vfd->vidioc_overlay)
 767                         break;
 768                 dbgarg (cmd, "value=%d\n",*i);
 769                 ret=vfd->vidioc_overlay(file, fh, *i);
 770                 break;
 771         }
 772 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 773         /* --- streaming capture ------------------------------------- */
 774         case VIDIOCGMBUF:
 775         {
 776                 struct video_mbuf *p=arg;
 777
 778                 memset(p,0,sizeof(p));
 779
 780                 if (!vfd->vidiocgmbuf)
 781                         break;
 782                 ret=vfd->vidiocgmbuf(file, fh, p);
 783                 if (!ret)
 784                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 785                                                 p->size, p->frames,
 786                                                 (unsigned long)p->offsets);
 787                 break;
 788         }
 789 #endif
 790         case VIDIOC_G_FBUF:
 791         {
 792                 struct v4l2_framebuffer *p=arg;
 793                 if (!vfd->vidioc_g_fbuf)
 794                         break;
 795                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 796                 if (!ret) {
 797                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 798                                         p->capability,p->flags,
 799                                         (unsigned long)p->base);
 800                         v4l_print_pix_fmt (vfd, &p->fmt);
 801                 }
 802                 break;
 803         }
 804         case VIDIOC_S_FBUF:
 805         {
 806                 struct v4l2_framebuffer *p=arg;
 807                 if (!vfd->vidioc_s_fbuf)
 808                         break;
 809
 810                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 811                                 p->capability,p->flags,(unsigned long)p->base);
 812                 v4l_print_pix_fmt (vfd, &p->fmt);
 813                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 814
 815                 break;
 816         }
 817         case VIDIOC_STREAMON:
 818         {
 819                 enum v4l2_buf_type i = *(int *)arg;
 820                 if (!vfd->vidioc_streamon)
 821                         break;
 822                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 823                 ret=vfd->vidioc_streamon(file, fh,i);
 824                 break;
 825         }
 826         case VIDIOC_STREAMOFF:
 827         {
 828                 enum v4l2_buf_type i = *(int *)arg;
 829
 830                 if (!vfd->vidioc_streamoff)
 831                         break;
 832                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 833                 ret=vfd->vidioc_streamoff(file, fh, i);
 834                 break;
 835         }
 836         /* ---------- tv norms ---------- */
 837         case VIDIOC_ENUMSTD:
 838         {
 839                 struct v4l2_standard *p = arg;
 840                 v4l2_std_id id = vfd->tvnorms,curr_id=0;
 841                 unsigned int index = p->index,i;
 842
 843                 if (index<0) {
 844                         ret=-EINVAL;
 845                         break;
 846                 }
 847
 848                 /* Return norm array on a canonical way */
 849                 for (i=0;i<= index && id; i++) {
 850                         if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
 851                                 curr_id = V4L2_STD_PAL;
 852                         } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
 853                                 curr_id = V4L2_STD_PAL_BG;
 854                         } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
 855                                 curr_id = V4L2_STD_PAL_DK;
 856                         } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
 857                                 curr_id = V4L2_STD_PAL_B;
 858                         } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
 859                                 curr_id = V4L2_STD_PAL_B1;
 860                         } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
 861                                 curr_id = V4L2_STD_PAL_G;
 862                         } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
 863                                 curr_id = V4L2_STD_PAL_H;
 864                         } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
 865                                 curr_id = V4L2_STD_PAL_I;
 866                         } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
 867                                 curr_id = V4L2_STD_PAL_D;
 868                         } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
 869                                 curr_id = V4L2_STD_PAL_D1;
 870                         } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
 871                                 curr_id = V4L2_STD_PAL_K;
 872                         } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
 873                                 curr_id = V4L2_STD_PAL_M;
 874                         } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
 875                                 curr_id = V4L2_STD_PAL_N;
 876                         } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
 877                                 curr_id = V4L2_STD_PAL_Nc;
 878                         } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
 879                                 curr_id = V4L2_STD_PAL_60;
 880                         } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
 881                                 curr_id = V4L2_STD_NTSC;
 882                         } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
 883                                 curr_id = V4L2_STD_NTSC_M;
 884                         } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
 885                                 curr_id = V4L2_STD_NTSC_M_JP;
 886                         } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
 887                                 curr_id = V4L2_STD_NTSC_443;
 888                         } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
 889                                 curr_id = V4L2_STD_NTSC_M_KR;
 890                         } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 891                                 curr_id = V4L2_STD_SECAM;
 892                         } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
 893                                 curr_id = V4L2_STD_SECAM_DK;
 894                         } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
 895                                 curr_id = V4L2_STD_SECAM_B;
 896                         } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
 897                                 curr_id = V4L2_STD_SECAM_D;
 898                         } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
 899                                 curr_id = V4L2_STD_SECAM_G;
 900                         } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
 901                                 curr_id = V4L2_STD_SECAM_H;
 902                         } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
 903                                 curr_id = V4L2_STD_SECAM_K;
 904                         } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
 905                                 curr_id = V4L2_STD_SECAM_K1;
 906                         } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
 907                                 curr_id = V4L2_STD_SECAM_L;
 908                         } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
 909                                 curr_id = V4L2_STD_SECAM_LC;
 910                         } else {
 911                                 break;
 912                         }
 913                         id &= ~curr_id;
 914                 }
 915                 if (i<=index)
 916                         return -EINVAL;
 917
 918                 v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
 919                 p->index = index;
 920
 921                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 922                                 "framelines=%d\n", p->index,
 923                                 (unsigned long long)p->id, p->name,
 924                                 p->frameperiod.numerator,
 925                                 p->frameperiod.denominator,
 926                                 p->framelines);
 927
 928                 ret=0;
 929                 break;
 930         }
 931         case VIDIOC_G_STD:
 932         {
 933                 v4l2_std_id *id = arg;
 934
 935                 *id = vfd->current_norm;
 936
 937                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 938
 939                 ret=0;
 940                 break;
 941         }
 942         case VIDIOC_S_STD:
 943         {
 944                 v4l2_std_id *id = arg,norm;
 945
 946                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 947
 948                 norm = (*id) & vfd->tvnorms;
 949                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
 950                         break;
 951
 952                 /* Calls the specific handler */
 953                 if (vfd->vidioc_s_std)
 954                         ret=vfd->vidioc_s_std(file, fh, &norm);
 955                 else
 956                         ret=-EINVAL;
 957
 958                 /* Updates standard information */
 959                 if (ret>=0)
 960                         vfd->current_norm=norm;
 961
 962                 break;
 963         }
 964         case VIDIOC_QUERYSTD:
 965         {
 966                 v4l2_std_id *p=arg;
 967
 968                 if (!vfd->vidioc_querystd)
 969                         break;
 970                 ret=vfd->vidioc_querystd(file, fh, arg);
 971                 if (!ret)
 972                         dbgarg (cmd, "detected std=%Lu\n",
 973                                                 (unsigned long long)*p);
 974                 break;
 975         }
 976         /* ------ input switching ---------- */
 977         /* FIXME: Inputs can be handled inside videodev2 */
 978         case VIDIOC_ENUMINPUT:
 979         {
 980                 struct v4l2_input *p=arg;
 981                 int i=p->index;
 982
 983                 if (!vfd->vidioc_enum_input)
 984                         break;
 985                 memset(p, 0, sizeof(*p));
 986                 p->index=i;
 987
 988                 ret=vfd->vidioc_enum_input(file, fh, p);
 989                 if (!ret)
 990                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
 991                                         "audioset=%d, "
 992                                         "tuner=%d, std=%Ld, status=%d\n",
 993                                         p->index,p->name,p->type,p->audioset,
 994                                         p->tuner,
 995                                         (unsigned long long)p->std,
 996                                         p->status);
 997                 break;
 998         }
 999         case VIDIOC_G_INPUT:
1000         {
1001                 unsigned int *i = arg;
1002
1003                 if (!vfd->vidioc_g_input)
1004                         break;
1005                 ret=vfd->vidioc_g_input(file, fh, i);
1006                 if (!ret)
1007                         dbgarg (cmd, "value=%d\n",*i);
1008                 break;
1009         }
1010         case VIDIOC_S_INPUT:
1011         {
1012                 unsigned int *i = arg;
1013
1014                 if (!vfd->vidioc_s_input)
1015                         break;
1016                 dbgarg (cmd, "value=%d\n",*i);
1017                 ret=vfd->vidioc_s_input(file, fh, *i);
1018                 break;
1019         }
1020
1021         /* ------ output switching ---------- */
1022         case VIDIOC_G_OUTPUT:
1023         {
1024                 unsigned int *i = arg;
1025
1026                 if (!vfd->vidioc_g_output)
1027                         break;
1028                 ret=vfd->vidioc_g_output(file, fh, i);
1029                 if (!ret)
1030                         dbgarg (cmd, "value=%d\n",*i);
1031                 break;
1032         }
1033         case VIDIOC_S_OUTPUT:
1034         {
1035                 unsigned int *i = arg;
1036
1037                 if (!vfd->vidioc_s_output)
1038                         break;
1039                 dbgarg (cmd, "value=%d\n",*i);
1040                 ret=vfd->vidioc_s_output(file, fh, *i);
1041                 break;
1042         }
1043
1044         /* --- controls ---------------------------------------------- */
1045         case VIDIOC_QUERYCTRL:
1046         {
1047                 struct v4l2_queryctrl *p=arg;
1048
1049                 if (!vfd->vidioc_queryctrl)
1050                         break;
1051                 ret=vfd->vidioc_queryctrl(file, fh, p);
1052
1053                 if (!ret)
1054                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1055                                         "min/max=%d/%d,"
1056                                         " step=%d, default=%d, flags=0x%08x\n",
1057                                         p->id,p->type,p->name,p->minimum,
1058                                         p->maximum,p->step,p->default_value,
1059                                         p->flags);
1060                 break;
1061         }
1062         case VIDIOC_G_CTRL:
1063         {
1064                 struct v4l2_control *p = arg;
1065
1066                 if (!vfd->vidioc_g_ctrl)
1067                         break;
1068                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1069
1070                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1071                 if (!ret)
1072                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1073                 break;
1074         }
1075         case VIDIOC_S_CTRL:
1076         {
1077                 struct v4l2_control *p = arg;
1078
1079                 if (!vfd->vidioc_s_ctrl)
1080                         break;
1081                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1082
1083                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1084                 break;
1085         }
1086         case VIDIOC_G_EXT_CTRLS:
1087         {
1088                 struct v4l2_ext_controls *p = arg;
1089
1090                 if (vfd->vidioc_g_ext_ctrls) {
1091                         dbgarg(cmd, "count=%d\n", p->count);
1092
1093                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1094                 }
1095                 break;
1096         }
1097         case VIDIOC_S_EXT_CTRLS:
1098         {
1099                 struct v4l2_ext_controls *p = arg;
1100
1101                 if (vfd->vidioc_s_ext_ctrls) {
1102                         dbgarg(cmd, "count=%d\n", p->count);
1103
1104                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1105                 }
1106                 break;
1107         }
1108         case VIDIOC_TRY_EXT_CTRLS:
1109         {
1110                 struct v4l2_ext_controls *p = arg;
1111
1112                 if (vfd->vidioc_try_ext_ctrls) {
1113                         dbgarg(cmd, "count=%d\n", p->count);
1114
1115                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1116                 }
1117                 break;
1118         }
1119         case VIDIOC_QUERYMENU:
1120         {
1121                 struct v4l2_querymenu *p=arg;
1122                 if (!vfd->vidioc_querymenu)
1123                         break;
1124                 ret=vfd->vidioc_querymenu(file, fh, p);
1125                 if (!ret)
1126                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1127                                                 p->id,p->index,p->name);
1128                 break;
1129         }
1130         /* --- audio ---------------------------------------------- */
1131         case VIDIOC_ENUMAUDIO:
1132         {
1133                 struct v4l2_audio *p=arg;
1134
1135                 if (!vfd->vidioc_enumaudio)
1136                         break;
1137                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1138                 ret=vfd->vidioc_enumaudio(file, fh, p);
1139                 if (!ret)
1140                         dbgarg2("index=%d, name=%s, capability=%d, "
1141                                         "mode=%d\n",p->index,p->name,
1142                                         p->capability, p->mode);
1143                 break;
1144         }
1145         case VIDIOC_G_AUDIO:
1146         {
1147                 struct v4l2_audio *p=arg;
1148                 __u32 index=p->index;
1149
1150                 if (!vfd->vidioc_g_audio)
1151                         break;
1152
1153                 memset(p,0,sizeof(*p));
1154                 p->index=index;
1155                 dbgarg(cmd, "Get for index=%d\n", p->index);
1156                 ret=vfd->vidioc_g_audio(file, fh, p);
1157                 if (!ret)
1158                         dbgarg2("index=%d, name=%s, capability=%d, "
1159                                         "mode=%d\n",p->index,
1160                                         p->name,p->capability, p->mode);
1161                 break;
1162         }
1163         case VIDIOC_S_AUDIO:
1164         {
1165                 struct v4l2_audio *p=arg;
1166
1167                 if (!vfd->vidioc_s_audio)
1168                         break;
1169                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1170                                         "mode=%d\n", p->index, p->name,
1171                                         p->capability, p->mode);
1172                 ret=vfd->vidioc_s_audio(file, fh, p);
1173                 break;
1174         }
1175         case VIDIOC_ENUMAUDOUT:
1176         {
1177                 struct v4l2_audioout *p=arg;
1178
1179                 if (!vfd->vidioc_enumaudout)
1180                         break;
1181                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1182                 ret=vfd->vidioc_enumaudout(file, fh, p);
1183                 if (!ret)
1184                         dbgarg2("index=%d, name=%s, capability=%d, "
1185                                         "mode=%d\n", p->index, p->name,
1186                                         p->capability,p->mode);
1187                 break;
1188         }
1189         case VIDIOC_G_AUDOUT:
1190         {
1191                 struct v4l2_audioout *p=arg;
1192
1193                 if (!vfd->vidioc_g_audout)
1194                         break;
1195                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1196                 ret=vfd->vidioc_g_audout(file, fh, p);
1197                 if (!ret)
1198                         dbgarg2("index=%d, name=%s, capability=%d, "
1199                                         "mode=%d\n", p->index, p->name,
1200                                         p->capability,p->mode);
1201                 break;
1202         }
1203         case VIDIOC_S_AUDOUT:
1204         {
1205                 struct v4l2_audioout *p=arg;
1206
1207                 if (!vfd->vidioc_s_audout)
1208                         break;
1209                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1210                                         "mode=%d\n", p->index, p->name,
1211                                         p->capability,p->mode);
1212
1213                 ret=vfd->vidioc_s_audout(file, fh, p);
1214                 break;
1215         }
1216         case VIDIOC_G_MODULATOR:
1217         {
1218                 struct v4l2_modulator *p=arg;
1219                 if (!vfd->vidioc_g_modulator)
1220                         break;
1221                 ret=vfd->vidioc_g_modulator(file, fh, p);
1222                 if (!ret)
1223                         dbgarg(cmd, "index=%d, name=%s, "
1224                                         "capability=%d, rangelow=%d,"
1225                                         " rangehigh=%d, txsubchans=%d\n",
1226                                         p->index, p->name,p->capability,
1227                                         p->rangelow, p->rangehigh,
1228                                         p->txsubchans);
1229                 break;
1230         }
1231         case VIDIOC_S_MODULATOR:
1232         {
1233                 struct v4l2_modulator *p=arg;
1234                 if (!vfd->vidioc_s_modulator)
1235                         break;
1236                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1237                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1238                                 p->index, p->name,p->capability,p->rangelow,
1239                                 p->rangehigh,p->txsubchans);
1240                         ret=vfd->vidioc_s_modulator(file, fh, p);
1241                 break;
1242         }
1243         case VIDIOC_G_CROP:
1244         {
1245                 struct v4l2_crop *p=arg;
1246                 if (!vfd->vidioc_g_crop)
1247                         break;
1248                 ret=vfd->vidioc_g_crop(file, fh, p);
1249                 if (!ret) {
1250                         dbgarg(cmd, "type=%d\n", p->type);
1251                         dbgrect(vfd, "", &p->c);
1252                 }
1253                 break;
1254         }
1255         case VIDIOC_S_CROP:
1256         {
1257                 struct v4l2_crop *p=arg;
1258                 if (!vfd->vidioc_s_crop)
1259                         break;
1260                 dbgarg(cmd, "type=%d\n", p->type);
1261                 dbgrect(vfd, "", &p->c);
1262                 ret=vfd->vidioc_s_crop(file, fh, p);
1263                 break;
1264         }
1265         case VIDIOC_CROPCAP:
1266         {
1267                 struct v4l2_cropcap *p=arg;
1268                 /*FIXME: Should also show v4l2_fract pixelaspect */
1269                 if (!vfd->vidioc_cropcap)
1270                         break;
1271                 dbgarg(cmd, "type=%d\n", p->type);
1272                 dbgrect(vfd, "bounds ", &p->bounds);
1273                 dbgrect(vfd, "defrect ", &p->defrect);
1274                 ret=vfd->vidioc_cropcap(file, fh, p);
1275                 break;
1276         }
1277         case VIDIOC_G_MPEGCOMP:
1278         {
1279                 struct v4l2_mpeg_compression *p=arg;
1280
1281                 /*FIXME: Several fields not shown */
1282                 if (!vfd->vidioc_g_mpegcomp)
1283                         break;
1284                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1285                 if (!ret)
1286                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1287                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1288                                         "ps_size=%d, au_sample_rate=%d, "
1289                                         "au_pesid=%c, vi_frame_rate=%d, "
1290                                         "vi_frames_per_gop=%d, "
1291                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1292                                         p->ts_pid_pmt,p->ts_pid_audio,
1293                                         p->ts_pid_video,p->ts_pid_pcr,
1294                                         p->ps_size, p->au_sample_rate,
1295                                         p->au_pesid, p->vi_frame_rate,
1296                                         p->vi_frames_per_gop,
1297                                         p->vi_bframes_count, p->vi_pesid);
1298                 break;
1299         }
1300         case VIDIOC_S_MPEGCOMP:
1301         {
1302                 struct v4l2_mpeg_compression *p=arg;
1303                 /*FIXME: Several fields not shown */
1304                 if (!vfd->vidioc_s_mpegcomp)
1305                         break;
1306                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1307                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1308                                 "au_sample_rate=%d, au_pesid=%c, "
1309                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1310                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1311                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1312                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1313                                 p->au_pesid, p->vi_frame_rate,
1314                                 p->vi_frames_per_gop, p->vi_bframes_count,
1315                                 p->vi_pesid);
1316                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1317                 break;
1318         }
1319         case VIDIOC_G_JPEGCOMP:
1320         {
1321                 struct v4l2_jpegcompression *p=arg;
1322                 if (!vfd->vidioc_g_jpegcomp)
1323                         break;
1324                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1325                 if (!ret)
1326                         dbgarg (cmd, "quality=%d, APPn=%d, "
1327                                                 "APP_len=%d, COM_len=%d, "
1328                                                 "jpeg_markers=%d\n",
1329                                                 p->quality,p->APPn,p->APP_len,
1330                                                 p->COM_len,p->jpeg_markers);
1331                 break;
1332         }
1333         case VIDIOC_S_JPEGCOMP:
1334         {
1335                 struct v4l2_jpegcompression *p=arg;
1336                 if (!vfd->vidioc_g_jpegcomp)
1337                         break;
1338                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1339                                         "COM_len=%d, jpeg_markers=%d\n",
1340                                         p->quality,p->APPn,p->APP_len,
1341                                         p->COM_len,p->jpeg_markers);
1342                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1343                 break;
1344         }
1345         case VIDIOC_G_PARM:
1346         {
1347                 struct v4l2_streamparm *p=arg;
1348                 if (vfd->vidioc_g_parm) {
1349                         ret=vfd->vidioc_g_parm(file, fh, p);
1350                 } else {
1351                         struct v4l2_standard s;
1352
1353                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1354                                 return -EINVAL;
1355
1356                         v4l2_video_std_construct(&s, vfd->current_norm,
1357                                                  v4l2_norm_to_name(vfd->current_norm));
1358
1359                         memset(p,0,sizeof(*p));
1360
1361                         p->parm.capture.timeperframe = s.frameperiod;
1362                         ret=0;
1363                 }
1364
1365                 dbgarg (cmd, "type=%d\n", p->type);
1366                 break;
1367         }
1368         case VIDIOC_S_PARM:
1369         {
1370                 struct v4l2_streamparm *p=arg;
1371                 if (!vfd->vidioc_s_parm)
1372                         break;
1373                 dbgarg (cmd, "type=%d\n", p->type);
1374                 ret=vfd->vidioc_s_parm(file, fh, p);
1375                 break;
1376         }
1377         case VIDIOC_G_TUNER:
1378         {
1379                 struct v4l2_tuner *p=arg;
1380                 __u32 index=p->index;
1381
1382                 if (!vfd->vidioc_g_tuner)
1383                         break;
1384
1385                 memset(p,0,sizeof(*p));
1386                 p->index=index;
1387
1388                 ret=vfd->vidioc_g_tuner(file, fh, p);
1389                 if (!ret)
1390                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1391                                         "capability=%d, rangelow=%d, "
1392                                         "rangehigh=%d, signal=%d, afc=%d, "
1393                                         "rxsubchans=%d, audmode=%d\n",
1394                                         p->index, p->name, p->type,
1395                                         p->capability, p->rangelow,
1396                                         p->rangehigh, p->rxsubchans,
1397                                         p->audmode, p->signal, p->afc);
1398                 break;
1399         }
1400         case VIDIOC_S_TUNER:
1401         {
1402                 struct v4l2_tuner *p=arg;
1403                 if (!vfd->vidioc_s_tuner)
1404                         break;
1405                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1406                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1407                                 "signal=%d, afc=%d, rxsubchans=%d, "
1408                                 "audmode=%d\n",p->index, p->name, p->type,
1409                                 p->capability, p->rangelow,p->rangehigh,
1410                                 p->rxsubchans, p->audmode, p->signal,
1411                                 p->afc);
1412                 ret=vfd->vidioc_s_tuner(file, fh, p);
1413                 break;
1414         }
1415         case VIDIOC_G_FREQUENCY:
1416         {
1417                 struct v4l2_frequency *p=arg;
1418                 if (!vfd->vidioc_g_frequency)
1419                         break;
1420
1421                 memset(p,0,sizeof(*p));
1422
1423                 ret=vfd->vidioc_g_frequency(file, fh, p);
1424                 if (!ret)
1425                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1426                                                 p->tuner,p->type,p->frequency);
1427                 break;
1428         }
1429         case VIDIOC_S_FREQUENCY:
1430         {
1431                 struct v4l2_frequency *p=arg;
1432                 if (!vfd->vidioc_s_frequency)
1433                         break;
1434                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1435                                 p->tuner,p->type,p->frequency);
1436                 ret=vfd->vidioc_s_frequency(file, fh, p);
1437                 break;
1438         }
1439         case VIDIOC_G_SLICED_VBI_CAP:
1440         {
1441                 struct v4l2_sliced_vbi_cap *p=arg;
1442                 if (!vfd->vidioc_g_sliced_vbi_cap)
1443                         break;
1444                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1445                 if (!ret)
1446                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1447                 break;
1448         }
1449         case VIDIOC_LOG_STATUS:
1450         {
1451                 if (!vfd->vidioc_log_status)
1452                         break;
1453                 ret=vfd->vidioc_log_status(file, fh);
1454                 break;
1455         }
1456         } /* switch */
1457
1458         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1459                 if (ret<0) {
1460                         printk ("%s: err:\n", vfd->name);
1461                         v4l_print_ioctl(vfd->name, cmd);
1462                 }
1463         }
1464
1465         return ret;
1466 }
1467
1468 int video_ioctl2 (struct inode *inode, struct file *file,
1469                unsigned int cmd, unsigned long arg)
1470 {
1471         char    sbuf[128];
1472         void    *mbuf = NULL;
1473         void    *parg = NULL;
1474         int     err  = -EINVAL;
1475         int     is_ext_ctrl;
1476         size_t  ctrls_size = 0;
1477         void __user *user_ptr = NULL;
1478
1479 #ifdef __OLD_VIDIOC_
1480         cmd = video_fix_command(cmd);
1481 #endif
1482         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1483                        cmd == VIDIOC_TRY_EXT_CTRLS);
1484
1485         /*  Copy arguments into temp kernel buffer  */
1486         switch (_IOC_DIR(cmd)) {
1487         case _IOC_NONE:
1488                 parg = NULL;
1489                 break;
1490         case _IOC_READ:
1491         case _IOC_WRITE:
1492         case (_IOC_WRITE | _IOC_READ):
1493                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1494                         parg = sbuf;
1495                 } else {
1496                         /* too big to allocate from stack */
1497                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1498                         if (NULL == mbuf)
1499                                 return -ENOMEM;
1500                         parg = mbuf;
1501                 }
1502
1503                 err = -EFAULT;
1504                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1505                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1506                                 goto out;
1507                 break;
1508         }
1509
1510         if (is_ext_ctrl) {
1511                 struct v4l2_ext_controls *p = parg;
1512
1513                 /* In case of an error, tell the caller that it wasn't
1514                    a specific control that caused it. */
1515                 p->error_idx = p->count;
1516                 user_ptr = (void __user *)p->controls;
1517                 if (p->count) {
1518                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1519                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1520                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1521                         err = -ENOMEM;
1522                         if (NULL == mbuf)
1523                                 goto out_ext_ctrl;
1524                         err = -EFAULT;
1525                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1526                                 goto out_ext_ctrl;
1527                         p->controls = mbuf;
1528                 }
1529         }
1530
1531         /* Handles IOCTL */
1532         err = __video_do_ioctl(inode, file, cmd, parg);
1533         if (err == -ENOIOCTLCMD)
1534                 err = -EINVAL;
1535         if (is_ext_ctrl) {
1536                 struct v4l2_ext_controls *p = parg;
1537
1538                 p->controls = (void *)user_ptr;
1539                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1540                         err = -EFAULT;
1541                 goto out_ext_ctrl;
1542         }
1543         if (err < 0)
1544                 goto out;
1545
1546 out_ext_ctrl:
1547         /*  Copy results into user buffer  */
1548         switch (_IOC_DIR(cmd))
1549         {
1550         case _IOC_READ:
1551         case (_IOC_WRITE | _IOC_READ):
1552                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1553                         err = -EFAULT;
1554                 break;
1555         }
1556
1557 out:
1558         kfree(mbuf);
1559         return err;
1560 }
1561
1562
1563 static const struct file_operations video_fops;
1564
1565 /**
1566  *      video_register_device - register video4linux devices
1567  *      @vfd:  video device structure we want to register
1568  *      @type: type of device to register
1569  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1570  *             -1 == first free)
1571  *
1572  *      The registration code assigns minor numbers based on the type
1573  *      requested. -ENFILE is returned in all the device slots for this
1574  *      category are full. If not then the minor field is set and the
1575  *      driver initialize function is called (if non %NULL).
1576  *
1577  *      Zero is returned on success.
1578  *
1579  *      Valid types are
1580  *
1581  *      %VFL_TYPE_GRABBER - A frame grabber
1582  *
1583  *      %VFL_TYPE_VTX - A teletext device
1584  *
1585  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1586  *
1587  *      %VFL_TYPE_RADIO - A radio card
1588  */
1589
1590 int video_register_device(struct video_device *vfd, int type, int nr)
1591 {
1592         int i=0;
1593         int base;
1594         int end;
1595         int ret;
1596         char *name_base;
1597
1598         switch(type)
1599         {
1600                 case VFL_TYPE_GRABBER:
1601                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1602                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1603                         name_base = "video";
1604                         break;
1605                 case VFL_TYPE_VTX:
1606                         base=MINOR_VFL_TYPE_VTX_MIN;
1607                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1608                         name_base = "vtx";
1609                         break;
1610                 case VFL_TYPE_VBI:
1611                         base=MINOR_VFL_TYPE_VBI_MIN;
1612                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1613                         name_base = "vbi";
1614                         break;
1615                 case VFL_TYPE_RADIO:
1616                         base=MINOR_VFL_TYPE_RADIO_MIN;
1617                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1618                         name_base = "radio";
1619                         break;
1620                 default:
1621                         printk(KERN_ERR "%s called with unknown type: %d\n",
1622                                __FUNCTION__, type);
1623                         return -1;
1624         }
1625
1626         /* pick a minor number */
1627         mutex_lock(&videodev_lock);
1628         if (nr >= 0  &&  nr < end-base) {
1629                 /* use the one the driver asked for */
1630                 i = base+nr;
1631                 if (NULL != video_device[i]) {
1632                         mutex_unlock(&videodev_lock);
1633                         return -ENFILE;
1634                 }
1635         } else {
1636                 /* use first free */
1637                 for(i=base;i<end;i++)
1638                         if (NULL == video_device[i])
1639                                 break;
1640                 if (i == end) {
1641                         mutex_unlock(&videodev_lock);
1642                         return -ENFILE;
1643                 }
1644         }
1645         video_device[i]=vfd;
1646         vfd->minor=i;
1647         mutex_unlock(&videodev_lock);
1648         mutex_init(&vfd->lock);
1649
1650         /* sysfs class */
1651         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1652         if (vfd->dev)
1653                 vfd->class_dev.dev = vfd->dev;
1654         vfd->class_dev.class       = &video_class;
1655         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1656         sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
1657         ret = class_device_register(&vfd->class_dev);
1658         if (ret < 0) {
1659                 printk(KERN_ERR "%s: class_device_register failed\n",
1660                        __FUNCTION__);
1661                 goto fail_minor;
1662         }
1663         ret = class_device_create_file(&vfd->class_dev, &class_device_attr_name);
1664         if (ret < 0) {
1665                 printk(KERN_ERR "%s: class_device_create_file 'name' failed\n",
1666                        __FUNCTION__);
1667                 goto fail_classdev;
1668         }
1669
1670 #if 1
1671         /* needed until all drivers are fixed */
1672         if (!vfd->release)
1673                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1674                        "Please fix your driver for proper sysfs support, see "
1675                        "http://lwn.net/Articles/36850/\n", vfd->name);
1676 #endif
1677         return 0;
1678
1679 fail_classdev:
1680         class_device_unregister(&vfd->class_dev);
1681 fail_minor:
1682         mutex_lock(&videodev_lock);
1683         video_device[vfd->minor] = NULL;
1684         vfd->minor = -1;
1685         mutex_unlock(&videodev_lock);
1686         return ret;
1687 }
1688
1689 /**
1690  *      video_unregister_device - unregister a video4linux device
1691  *      @vfd: the device to unregister
1692  *
1693  *      This unregisters the passed device and deassigns the minor
1694  *      number. Future open calls will be met with errors.
1695  */
1696
1697 void video_unregister_device(struct video_device *vfd)
1698 {
1699         mutex_lock(&videodev_lock);
1700         if(video_device[vfd->minor]!=vfd)
1701                 panic("videodev: bad unregister");
1702
1703         video_device[vfd->minor]=NULL;
1704         class_device_unregister(&vfd->class_dev);
1705         mutex_unlock(&videodev_lock);
1706 }
1707
1708 /*
1709  * Video fs operations
1710  */
1711 static const struct file_operations video_fops=
1712 {
1713         .owner          = THIS_MODULE,
1714         .llseek         = no_llseek,
1715         .open           = video_open,
1716 };
1717
1718 /*
1719  *      Initialise video for linux
1720  */
1721
1722 static int __init videodev_init(void)
1723 {
1724         int ret;
1725
1726         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1727         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1728                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1729                 return -EIO;
1730         }
1731
1732         ret = class_register(&video_class);
1733         if (ret < 0) {
1734                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1735                 printk(KERN_WARNING "video_dev: class_register failed\n");
1736                 return -EIO;
1737         }
1738
1739         return 0;
1740 }
1741
1742 static void __exit videodev_exit(void)
1743 {
1744         class_unregister(&video_class);
1745         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1746 }
1747
1748 module_init(videodev_init)
1749 module_exit(videodev_exit)
1750
1751 EXPORT_SYMBOL(video_register_device);
1752 EXPORT_SYMBOL(video_unregister_device);
1753 EXPORT_SYMBOL(video_devdata);
1754 EXPORT_SYMBOL(video_usercopy);
1755 EXPORT_SYMBOL(video_exclusive_open);
1756 EXPORT_SYMBOL(video_exclusive_release);
1757 EXPORT_SYMBOL(video_ioctl2);
1758 EXPORT_SYMBOL(video_device_alloc);
1759 EXPORT_SYMBOL(video_device_release);
1760
1761 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1762 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1763 MODULE_LICENSE("GPL");
1764
1765
1766 /*
1767  * Local variables:
1768  * c-basic-offset: 8
1769  * End:
1770  */