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, length=%d\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, p->length);
 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=%c%c%c%c, field=%s, "
 373                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 374                 fmt->width,fmt->height,
 375                 (fmt->pixelformat & 0xff),
 376                 (fmt->pixelformat >>  8) & 0xff,
 377                 (fmt->pixelformat >> 16) & 0xff,
 378                 (fmt->pixelformat >> 24) & 0xff,
 379                 prt_names(fmt->field,v4l2_field_names_FIXME),
 380                 fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
 381 };
 382
 383
 384 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 385 {
 386         switch (type) {
 387         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 388                 if (vfd->vidioc_try_fmt_cap)
 389                         return (0);
 390                 break;
 391         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 392                 if (vfd->vidioc_try_fmt_overlay)
 393                         return (0);
 394                 break;
 395         case V4L2_BUF_TYPE_VBI_CAPTURE:
 396                 if (vfd->vidioc_try_fmt_vbi)
 397                         return (0);
 398                 break;
 399         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 400                 if (vfd->vidioc_try_fmt_vbi_output)
 401                         return (0);
 402                 break;
 403         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 404                 if (vfd->vidioc_try_fmt_vbi_capture)
 405                         return (0);
 406                 break;
 407         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 408                 if (vfd->vidioc_try_fmt_video_output)
 409                         return (0);
 410                 break;
 411         case V4L2_BUF_TYPE_VBI_OUTPUT:
 412                 if (vfd->vidioc_try_fmt_vbi_output)
 413                         return (0);
 414                 break;
 415         case V4L2_BUF_TYPE_PRIVATE:
 416                 if (vfd->vidioc_try_fmt_type_private)
 417                         return (0);
 418                 break;
 419         }
 420         return (-EINVAL);
 421 }
 422
 423 static int __video_do_ioctl(struct inode *inode, struct file *file,
 424                 unsigned int cmd, void *arg)
 425 {
 426         struct video_device *vfd = video_devdata(file);
 427         void                 *fh = file->private_data;
 428         int                  ret = -EINVAL;
 429
 430         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 431                                 !(vfd->debug | V4L2_DEBUG_IOCTL_ARG)) {
 432                 v4l_print_ioctl(vfd->name, cmd);
 433         }
 434
 435         if (_IOC_TYPE(cmd)=='v')
 436                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 437                                                 __video_do_ioctl);
 438
 439         switch(cmd) {
 440         /* --- capabilities ------------------------------------------ */
 441         case VIDIOC_QUERYCAP:
 442         {
 443                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 444                 memset(cap, 0, sizeof(*cap));
 445
 446                 if (!vfd->vidioc_querycap)
 447                         break;
 448
 449                 ret=vfd->vidioc_querycap(file, fh, cap);
 450                 if (!ret)
 451                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 452                                         "version=0x%08x, "
 453                                         "capabilities=0x%08x\n",
 454                                         cap->driver,cap->card,cap->bus_info,
 455                                         cap->version,
 456                                         cap->capabilities);
 457                 break;
 458         }
 459
 460         /* --- priority ------------------------------------------ */
 461         case VIDIOC_G_PRIORITY:
 462         {
 463                 enum v4l2_priority *p=arg;
 464
 465                 if (!vfd->vidioc_g_priority)
 466                         break;
 467                 ret=vfd->vidioc_g_priority(file, fh, p);
 468                 if (!ret)
 469                         dbgarg(cmd, "priority is %d\n", *p);
 470                 break;
 471         }
 472         case VIDIOC_S_PRIORITY:
 473         {
 474                 enum v4l2_priority *p=arg;
 475
 476                 if (!vfd->vidioc_s_priority)
 477                         break;
 478                 dbgarg(cmd, "setting priority to %d\n", *p);
 479                 ret=vfd->vidioc_s_priority(file, fh, *p);
 480                 break;
 481         }
 482
 483         /* --- capture ioctls ---------------------------------------- */
 484         case VIDIOC_ENUM_FMT:
 485         {
 486                 struct v4l2_fmtdesc *f = arg;
 487                 enum v4l2_buf_type type;
 488                 unsigned int index;
 489
 490                 index = f->index;
 491                 type  = f->type;
 492                 memset(f,0,sizeof(*f));
 493                 f->index = index;
 494                 f->type  = type;
 495
 496                 switch (type) {
 497                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 498                         if (vfd->vidioc_enum_fmt_cap)
 499                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 500                         break;
 501                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 502                         if (vfd->vidioc_enum_fmt_overlay)
 503                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 504                         break;
 505                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 506                         if (vfd->vidioc_enum_fmt_vbi)
 507                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 508                         break;
 509                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 510                         if (vfd->vidioc_enum_fmt_vbi_output)
 511                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 512                                                                 fh, f);
 513                         break;
 514                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 515                         if (vfd->vidioc_enum_fmt_vbi_capture)
 516                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 517                                                                 fh, f);
 518                         break;
 519                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 520                         if (vfd->vidioc_enum_fmt_video_output)
 521                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 522                                                                 fh, f);
 523                         break;
 524                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 525                         if (vfd->vidioc_enum_fmt_vbi_output)
 526                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 527                                                                 fh, f);
 528                         break;
 529                 case V4L2_BUF_TYPE_PRIVATE:
 530                         if (vfd->vidioc_enum_fmt_type_private)
 531                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 532                                                                 fh, f);
 533                         break;
 534                 }
 535                 if (!ret)
 536                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 537                                         "pixelformat=%c%c%c%c, description='%s'\n",
 538                                         f->index, f->type, f->flags,
 539                                         (f->pixelformat & 0xff),
 540                                         (f->pixelformat >>  8) & 0xff,
 541                                         (f->pixelformat >> 16) & 0xff,
 542                                         (f->pixelformat >> 24) & 0xff,
 543                                         f->description);
 544                 break;
 545         }
 546         case VIDIOC_G_FMT:
 547         {
 548                 struct v4l2_format *f = (struct v4l2_format *)arg;
 549                 enum v4l2_buf_type type=f->type;
 550
 551                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 552                 f->type=type;
 553
 554                 /* FIXME: Should be one dump per type */
 555                 dbgarg (cmd, "type=%s\n", prt_names(type,
 556                                         v4l2_type_names_FIXME));
 557
 558                 switch (type) {
 559                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 560                         if (vfd->vidioc_g_fmt_cap)
 561                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 562                         if (!ret)
 563                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 564                         break;
 565                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 566                         if (vfd->vidioc_g_fmt_overlay)
 567                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 568                         break;
 569                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 570                         if (vfd->vidioc_g_fmt_vbi)
 571                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 572                         break;
 573                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 574                         if (vfd->vidioc_g_fmt_vbi_output)
 575                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 576                         break;
 577                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 578                         if (vfd->vidioc_g_fmt_vbi_capture)
 579                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 580                         break;
 581                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 582                         if (vfd->vidioc_g_fmt_video_output)
 583                                 ret=vfd->vidioc_g_fmt_video_output(file,
 584                                                                 fh, f);
 585                         break;
 586                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 587                         if (vfd->vidioc_g_fmt_vbi_output)
 588                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 589                         break;
 590                 case V4L2_BUF_TYPE_PRIVATE:
 591                         if (vfd->vidioc_g_fmt_type_private)
 592                                 ret=vfd->vidioc_g_fmt_type_private(file,
 593                                                                 fh, f);
 594                         break;
 595                 }
 596
 597                 break;
 598         }
 599         case VIDIOC_S_FMT:
 600         {
 601                 struct v4l2_format *f = (struct v4l2_format *)arg;
 602
 603                 /* FIXME: Should be one dump per type */
 604                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 605                                         v4l2_type_names_FIXME));
 606
 607                 switch (f->type) {
 608                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 609                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 610                         if (vfd->vidioc_s_fmt_cap)
 611                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 612                         break;
 613                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 614                         if (vfd->vidioc_s_fmt_overlay)
 615                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 616                         break;
 617                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 618                         if (vfd->vidioc_s_fmt_vbi)
 619                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 620                         break;
 621                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 622                         if (vfd->vidioc_s_fmt_vbi_output)
 623                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 624                         break;
 625                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 626                         if (vfd->vidioc_s_fmt_vbi_capture)
 627                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 628                         break;
 629                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 630                         if (vfd->vidioc_s_fmt_video_output)
 631                                 ret=vfd->vidioc_s_fmt_video_output(file,
 632                                                                 fh, f);
 633                         break;
 634                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 635                         if (vfd->vidioc_s_fmt_vbi_output)
 636                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 637                                                                 fh, f);
 638                         break;
 639                 case V4L2_BUF_TYPE_PRIVATE:
 640                         if (vfd->vidioc_s_fmt_type_private)
 641                                 ret=vfd->vidioc_s_fmt_type_private(file,
 642                                                                 fh, f);
 643                         break;
 644                 }
 645                 break;
 646         }
 647         case VIDIOC_TRY_FMT:
 648         {
 649                 struct v4l2_format *f = (struct v4l2_format *)arg;
 650
 651                 /* FIXME: Should be one dump per type */
 652                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 653                                                 v4l2_type_names_FIXME));
 654                 switch (f->type) {
 655                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 656                         if (vfd->vidioc_try_fmt_cap)
 657                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
 658                         if (!ret)
 659                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 660                         break;
 661                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 662                         if (vfd->vidioc_try_fmt_overlay)
 663                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
 664                         break;
 665                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 666                         if (vfd->vidioc_try_fmt_vbi)
 667                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
 668                         break;
 669                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 670                         if (vfd->vidioc_try_fmt_vbi_output)
 671                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 672                                                                 fh, f);
 673                         break;
 674                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 675                         if (vfd->vidioc_try_fmt_vbi_capture)
 676                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
 677                                                                 fh, f);
 678                         break;
 679                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 680                         if (vfd->vidioc_try_fmt_video_output)
 681                                 ret=vfd->vidioc_try_fmt_video_output(file,
 682                                                                 fh, f);
 683                         break;
 684                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 685                         if (vfd->vidioc_try_fmt_vbi_output)
 686                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
 687                                                                 fh, f);
 688                         break;
 689                 case V4L2_BUF_TYPE_PRIVATE:
 690                         if (vfd->vidioc_try_fmt_type_private)
 691                                 ret=vfd->vidioc_try_fmt_type_private(file,
 692                                                                 fh, f);
 693                         break;
 694                 }
 695
 696                 break;
 697         }
 698         /* FIXME: Those buf reqs could be handled here,
 699            with some changes on videobuf to allow its header to be included at
 700            videodev2.h or being merged at videodev2.
 701          */
 702         case VIDIOC_REQBUFS:
 703         {
 704                 struct v4l2_requestbuffers *p=arg;
 705
 706                 if (!vfd->vidioc_reqbufs)
 707                         break;
 708                 ret = check_fmt (vfd, p->type);
 709                 if (ret)
 710                         break;
 711
 712                 ret=vfd->vidioc_reqbufs(file, fh, p);
 713                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
 714                                 p->count,
 715                                 prt_names(p->type,v4l2_type_names_FIXME),
 716                                 prt_names(p->memory,v4l2_memory_names));
 717                 break;
 718         }
 719         case VIDIOC_QUERYBUF:
 720         {
 721                 struct v4l2_buffer *p=arg;
 722
 723                 if (!vfd->vidioc_querybuf)
 724                         break;
 725                 ret = check_fmt (vfd, p->type);
 726                 if (ret)
 727                         break;
 728
 729                 ret=vfd->vidioc_querybuf(file, fh, p);
 730                 if (!ret)
 731                         dbgbuf(cmd,vfd,p);
 732                 break;
 733         }
 734         case VIDIOC_QBUF:
 735         {
 736                 struct v4l2_buffer *p=arg;
 737
 738                 if (!vfd->vidioc_qbuf)
 739                         break;
 740                 ret = check_fmt (vfd, p->type);
 741                 if (ret)
 742                         break;
 743
 744                 ret=vfd->vidioc_qbuf(file, fh, p);
 745                 if (!ret)
 746                         dbgbuf(cmd,vfd,p);
 747                 break;
 748         }
 749         case VIDIOC_DQBUF:
 750         {
 751                 struct v4l2_buffer *p=arg;
 752                 if (!vfd->vidioc_dqbuf)
 753                         break;
 754                 ret = check_fmt (vfd, p->type);
 755                 if (ret)
 756                         break;
 757
 758                 ret=vfd->vidioc_dqbuf(file, fh, p);
 759                 if (!ret)
 760                         dbgbuf(cmd,vfd,p);
 761                 break;
 762         }
 763         case VIDIOC_OVERLAY:
 764         {
 765                 int *i = arg;
 766
 767                 if (!vfd->vidioc_overlay)
 768                         break;
 769                 dbgarg (cmd, "value=%d\n",*i);
 770                 ret=vfd->vidioc_overlay(file, fh, *i);
 771                 break;
 772         }
 773 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 774         /* --- streaming capture ------------------------------------- */
 775         case VIDIOCGMBUF:
 776         {
 777                 struct video_mbuf *p=arg;
 778
 779                 memset(p,0,sizeof(p));
 780
 781                 if (!vfd->vidiocgmbuf)
 782                         break;
 783                 ret=vfd->vidiocgmbuf(file, fh, p);
 784                 if (!ret)
 785                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 786                                                 p->size, p->frames,
 787                                                 (unsigned long)p->offsets);
 788                 break;
 789         }
 790 #endif
 791         case VIDIOC_G_FBUF:
 792         {
 793                 struct v4l2_framebuffer *p=arg;
 794                 if (!vfd->vidioc_g_fbuf)
 795                         break;
 796                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
 797                 if (!ret) {
 798                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 799                                         p->capability,p->flags,
 800                                         (unsigned long)p->base);
 801                         v4l_print_pix_fmt (vfd, &p->fmt);
 802                 }
 803                 break;
 804         }
 805         case VIDIOC_S_FBUF:
 806         {
 807                 struct v4l2_framebuffer *p=arg;
 808                 if (!vfd->vidioc_s_fbuf)
 809                         break;
 810
 811                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
 812                                 p->capability,p->flags,(unsigned long)p->base);
 813                 v4l_print_pix_fmt (vfd, &p->fmt);
 814                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
 815
 816                 break;
 817         }
 818         case VIDIOC_STREAMON:
 819         {
 820                 enum v4l2_buf_type i = *(int *)arg;
 821                 if (!vfd->vidioc_streamon)
 822                         break;
 823                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 824                 ret=vfd->vidioc_streamon(file, fh,i);
 825                 break;
 826         }
 827         case VIDIOC_STREAMOFF:
 828         {
 829                 enum v4l2_buf_type i = *(int *)arg;
 830
 831                 if (!vfd->vidioc_streamoff)
 832                         break;
 833                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
 834                 ret=vfd->vidioc_streamoff(file, fh, i);
 835                 break;
 836         }
 837         /* ---------- tv norms ---------- */
 838         case VIDIOC_ENUMSTD:
 839         {
 840                 struct v4l2_standard *p = arg;
 841                 v4l2_std_id id = vfd->tvnorms,curr_id=0;
 842                 unsigned int index = p->index,i;
 843
 844                 if (index<0) {
 845                         ret=-EINVAL;
 846                         break;
 847                 }
 848
 849                 /* Return norm array on a canonical way */
 850                 for (i=0;i<= index && id; i++) {
 851                         if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
 852                                 curr_id = V4L2_STD_PAL;
 853                         } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
 854                                 curr_id = V4L2_STD_PAL_BG;
 855                         } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
 856                                 curr_id = V4L2_STD_PAL_DK;
 857                         } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
 858                                 curr_id = V4L2_STD_PAL_B;
 859                         } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
 860                                 curr_id = V4L2_STD_PAL_B1;
 861                         } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
 862                                 curr_id = V4L2_STD_PAL_G;
 863                         } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
 864                                 curr_id = V4L2_STD_PAL_H;
 865                         } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
 866                                 curr_id = V4L2_STD_PAL_I;
 867                         } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
 868                                 curr_id = V4L2_STD_PAL_D;
 869                         } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
 870                                 curr_id = V4L2_STD_PAL_D1;
 871                         } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
 872                                 curr_id = V4L2_STD_PAL_K;
 873                         } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
 874                                 curr_id = V4L2_STD_PAL_M;
 875                         } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
 876                                 curr_id = V4L2_STD_PAL_N;
 877                         } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
 878                                 curr_id = V4L2_STD_PAL_Nc;
 879                         } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
 880                                 curr_id = V4L2_STD_PAL_60;
 881                         } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
 882                                 curr_id = V4L2_STD_NTSC;
 883                         } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
 884                                 curr_id = V4L2_STD_NTSC_M;
 885                         } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
 886                                 curr_id = V4L2_STD_NTSC_M_JP;
 887                         } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
 888                                 curr_id = V4L2_STD_NTSC_443;
 889                         } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
 890                                 curr_id = V4L2_STD_NTSC_M_KR;
 891                         } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 892                                 curr_id = V4L2_STD_SECAM;
 893                         } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
 894                                 curr_id = V4L2_STD_SECAM_DK;
 895                         } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
 896                                 curr_id = V4L2_STD_SECAM_B;
 897                         } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
 898                                 curr_id = V4L2_STD_SECAM_D;
 899                         } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
 900                                 curr_id = V4L2_STD_SECAM_G;
 901                         } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
 902                                 curr_id = V4L2_STD_SECAM_H;
 903                         } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
 904                                 curr_id = V4L2_STD_SECAM_K;
 905                         } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
 906                                 curr_id = V4L2_STD_SECAM_K1;
 907                         } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
 908                                 curr_id = V4L2_STD_SECAM_L;
 909                         } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
 910                                 curr_id = V4L2_STD_SECAM_LC;
 911                         } else {
 912                                 break;
 913                         }
 914                         id &= ~curr_id;
 915                 }
 916                 if (i<=index)
 917                         return -EINVAL;
 918
 919                 v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
 920                 p->index = index;
 921
 922                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
 923                                 "framelines=%d\n", p->index,
 924                                 (unsigned long long)p->id, p->name,
 925                                 p->frameperiod.numerator,
 926                                 p->frameperiod.denominator,
 927                                 p->framelines);
 928
 929                 ret=0;
 930                 break;
 931         }
 932         case VIDIOC_G_STD:
 933         {
 934                 v4l2_std_id *id = arg;
 935
 936                 *id = vfd->current_norm;
 937
 938                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 939
 940                 ret=0;
 941                 break;
 942         }
 943         case VIDIOC_S_STD:
 944         {
 945                 v4l2_std_id *id = arg,norm;
 946
 947                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
 948
 949                 norm = (*id) & vfd->tvnorms;
 950                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
 951                         break;
 952
 953                 /* Calls the specific handler */
 954                 if (vfd->vidioc_s_std)
 955                         ret=vfd->vidioc_s_std(file, fh, &norm);
 956                 else
 957                         ret=-EINVAL;
 958
 959                 /* Updates standard information */
 960                 if (ret>=0)
 961                         vfd->current_norm=norm;
 962
 963                 break;
 964         }
 965         case VIDIOC_QUERYSTD:
 966         {
 967                 v4l2_std_id *p=arg;
 968
 969                 if (!vfd->vidioc_querystd)
 970                         break;
 971                 ret=vfd->vidioc_querystd(file, fh, arg);
 972                 if (!ret)
 973                         dbgarg (cmd, "detected std=%Lu\n",
 974                                                 (unsigned long long)*p);
 975                 break;
 976         }
 977         /* ------ input switching ---------- */
 978         /* FIXME: Inputs can be handled inside videodev2 */
 979         case VIDIOC_ENUMINPUT:
 980         {
 981                 struct v4l2_input *p=arg;
 982                 int i=p->index;
 983
 984                 if (!vfd->vidioc_enum_input)
 985                         break;
 986                 memset(p, 0, sizeof(*p));
 987                 p->index=i;
 988
 989                 ret=vfd->vidioc_enum_input(file, fh, p);
 990                 if (!ret)
 991                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
 992                                         "audioset=%d, "
 993                                         "tuner=%d, std=%Ld, status=%d\n",
 994                                         p->index,p->name,p->type,p->audioset,
 995                                         p->tuner,
 996                                         (unsigned long long)p->std,
 997                                         p->status);
 998                 break;
 999         }
1000         case VIDIOC_G_INPUT:
1001         {
1002                 unsigned int *i = arg;
1003
1004                 if (!vfd->vidioc_g_input)
1005                         break;
1006                 ret=vfd->vidioc_g_input(file, fh, i);
1007                 if (!ret)
1008                         dbgarg (cmd, "value=%d\n",*i);
1009                 break;
1010         }
1011         case VIDIOC_S_INPUT:
1012         {
1013                 unsigned int *i = arg;
1014
1015                 if (!vfd->vidioc_s_input)
1016                         break;
1017                 dbgarg (cmd, "value=%d\n",*i);
1018                 ret=vfd->vidioc_s_input(file, fh, *i);
1019                 break;
1020         }
1021
1022         /* ------ output switching ---------- */
1023         case VIDIOC_G_OUTPUT:
1024         {
1025                 unsigned int *i = arg;
1026
1027                 if (!vfd->vidioc_g_output)
1028                         break;
1029                 ret=vfd->vidioc_g_output(file, fh, i);
1030                 if (!ret)
1031                         dbgarg (cmd, "value=%d\n",*i);
1032                 break;
1033         }
1034         case VIDIOC_S_OUTPUT:
1035         {
1036                 unsigned int *i = arg;
1037
1038                 if (!vfd->vidioc_s_output)
1039                         break;
1040                 dbgarg (cmd, "value=%d\n",*i);
1041                 ret=vfd->vidioc_s_output(file, fh, *i);
1042                 break;
1043         }
1044
1045         /* --- controls ---------------------------------------------- */
1046         case VIDIOC_QUERYCTRL:
1047         {
1048                 struct v4l2_queryctrl *p=arg;
1049
1050                 if (!vfd->vidioc_queryctrl)
1051                         break;
1052                 ret=vfd->vidioc_queryctrl(file, fh, p);
1053
1054                 if (!ret)
1055                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1056                                         "min/max=%d/%d,"
1057                                         " step=%d, default=%d, flags=0x%08x\n",
1058                                         p->id,p->type,p->name,p->minimum,
1059                                         p->maximum,p->step,p->default_value,
1060                                         p->flags);
1061                 break;
1062         }
1063         case VIDIOC_G_CTRL:
1064         {
1065                 struct v4l2_control *p = arg;
1066
1067                 if (!vfd->vidioc_g_ctrl)
1068                         break;
1069                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1070
1071                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1072                 if (!ret)
1073                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1074                 break;
1075         }
1076         case VIDIOC_S_CTRL:
1077         {
1078                 struct v4l2_control *p = arg;
1079
1080                 if (!vfd->vidioc_s_ctrl)
1081                         break;
1082                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1083
1084                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1085                 break;
1086         }
1087         case VIDIOC_G_EXT_CTRLS:
1088         {
1089                 struct v4l2_ext_controls *p = arg;
1090
1091                 if (vfd->vidioc_g_ext_ctrls) {
1092                         dbgarg(cmd, "count=%d\n", p->count);
1093
1094                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1095                 }
1096                 break;
1097         }
1098         case VIDIOC_S_EXT_CTRLS:
1099         {
1100                 struct v4l2_ext_controls *p = arg;
1101
1102                 if (vfd->vidioc_s_ext_ctrls) {
1103                         dbgarg(cmd, "count=%d\n", p->count);
1104
1105                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1106                 }
1107                 break;
1108         }
1109         case VIDIOC_TRY_EXT_CTRLS:
1110         {
1111                 struct v4l2_ext_controls *p = arg;
1112
1113                 if (vfd->vidioc_try_ext_ctrls) {
1114                         dbgarg(cmd, "count=%d\n", p->count);
1115
1116                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1117                 }
1118                 break;
1119         }
1120         case VIDIOC_QUERYMENU:
1121         {
1122                 struct v4l2_querymenu *p=arg;
1123                 if (!vfd->vidioc_querymenu)
1124                         break;
1125                 ret=vfd->vidioc_querymenu(file, fh, p);
1126                 if (!ret)
1127                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1128                                                 p->id,p->index,p->name);
1129                 break;
1130         }
1131         /* --- audio ---------------------------------------------- */
1132         case VIDIOC_ENUMAUDIO:
1133         {
1134                 struct v4l2_audio *p=arg;
1135
1136                 if (!vfd->vidioc_enumaudio)
1137                         break;
1138                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1139                 ret=vfd->vidioc_enumaudio(file, fh, p);
1140                 if (!ret)
1141                         dbgarg2("index=%d, name=%s, capability=%d, "
1142                                         "mode=%d\n",p->index,p->name,
1143                                         p->capability, p->mode);
1144                 break;
1145         }
1146         case VIDIOC_G_AUDIO:
1147         {
1148                 struct v4l2_audio *p=arg;
1149                 __u32 index=p->index;
1150
1151                 if (!vfd->vidioc_g_audio)
1152                         break;
1153
1154                 memset(p,0,sizeof(*p));
1155                 p->index=index;
1156                 dbgarg(cmd, "Get for index=%d\n", p->index);
1157                 ret=vfd->vidioc_g_audio(file, fh, p);
1158                 if (!ret)
1159                         dbgarg2("index=%d, name=%s, capability=%d, "
1160                                         "mode=%d\n",p->index,
1161                                         p->name,p->capability, p->mode);
1162                 break;
1163         }
1164         case VIDIOC_S_AUDIO:
1165         {
1166                 struct v4l2_audio *p=arg;
1167
1168                 if (!vfd->vidioc_s_audio)
1169                         break;
1170                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1171                                         "mode=%d\n", p->index, p->name,
1172                                         p->capability, p->mode);
1173                 ret=vfd->vidioc_s_audio(file, fh, p);
1174                 break;
1175         }
1176         case VIDIOC_ENUMAUDOUT:
1177         {
1178                 struct v4l2_audioout *p=arg;
1179
1180                 if (!vfd->vidioc_enumaudout)
1181                         break;
1182                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1183                 ret=vfd->vidioc_enumaudout(file, fh, p);
1184                 if (!ret)
1185                         dbgarg2("index=%d, name=%s, capability=%d, "
1186                                         "mode=%d\n", p->index, p->name,
1187                                         p->capability,p->mode);
1188                 break;
1189         }
1190         case VIDIOC_G_AUDOUT:
1191         {
1192                 struct v4l2_audioout *p=arg;
1193
1194                 if (!vfd->vidioc_g_audout)
1195                         break;
1196                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1197                 ret=vfd->vidioc_g_audout(file, fh, p);
1198                 if (!ret)
1199                         dbgarg2("index=%d, name=%s, capability=%d, "
1200                                         "mode=%d\n", p->index, p->name,
1201                                         p->capability,p->mode);
1202                 break;
1203         }
1204         case VIDIOC_S_AUDOUT:
1205         {
1206                 struct v4l2_audioout *p=arg;
1207
1208                 if (!vfd->vidioc_s_audout)
1209                         break;
1210                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1211                                         "mode=%d\n", p->index, p->name,
1212                                         p->capability,p->mode);
1213
1214                 ret=vfd->vidioc_s_audout(file, fh, p);
1215                 break;
1216         }
1217         case VIDIOC_G_MODULATOR:
1218         {
1219                 struct v4l2_modulator *p=arg;
1220                 if (!vfd->vidioc_g_modulator)
1221                         break;
1222                 ret=vfd->vidioc_g_modulator(file, fh, p);
1223                 if (!ret)
1224                         dbgarg(cmd, "index=%d, name=%s, "
1225                                         "capability=%d, rangelow=%d,"
1226                                         " rangehigh=%d, txsubchans=%d\n",
1227                                         p->index, p->name,p->capability,
1228                                         p->rangelow, p->rangehigh,
1229                                         p->txsubchans);
1230                 break;
1231         }
1232         case VIDIOC_S_MODULATOR:
1233         {
1234                 struct v4l2_modulator *p=arg;
1235                 if (!vfd->vidioc_s_modulator)
1236                         break;
1237                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1238                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1239                                 p->index, p->name,p->capability,p->rangelow,
1240                                 p->rangehigh,p->txsubchans);
1241                         ret=vfd->vidioc_s_modulator(file, fh, p);
1242                 break;
1243         }
1244         case VIDIOC_G_CROP:
1245         {
1246                 struct v4l2_crop *p=arg;
1247                 if (!vfd->vidioc_g_crop)
1248                         break;
1249                 ret=vfd->vidioc_g_crop(file, fh, p);
1250                 if (!ret) {
1251                         dbgarg(cmd, "type=%d\n", p->type);
1252                         dbgrect(vfd, "", &p->c);
1253                 }
1254                 break;
1255         }
1256         case VIDIOC_S_CROP:
1257         {
1258                 struct v4l2_crop *p=arg;
1259                 if (!vfd->vidioc_s_crop)
1260                         break;
1261                 dbgarg(cmd, "type=%d\n", p->type);
1262                 dbgrect(vfd, "", &p->c);
1263                 ret=vfd->vidioc_s_crop(file, fh, p);
1264                 break;
1265         }
1266         case VIDIOC_CROPCAP:
1267         {
1268                 struct v4l2_cropcap *p=arg;
1269                 /*FIXME: Should also show v4l2_fract pixelaspect */
1270                 if (!vfd->vidioc_cropcap)
1271                         break;
1272                 dbgarg(cmd, "type=%d\n", p->type);
1273                 dbgrect(vfd, "bounds ", &p->bounds);
1274                 dbgrect(vfd, "defrect ", &p->defrect);
1275                 ret=vfd->vidioc_cropcap(file, fh, p);
1276                 break;
1277         }
1278         case VIDIOC_G_MPEGCOMP:
1279         {
1280                 struct v4l2_mpeg_compression *p=arg;
1281
1282                 /*FIXME: Several fields not shown */
1283                 if (!vfd->vidioc_g_mpegcomp)
1284                         break;
1285                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1286                 if (!ret)
1287                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1288                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1289                                         "ps_size=%d, au_sample_rate=%d, "
1290                                         "au_pesid=%c, vi_frame_rate=%d, "
1291                                         "vi_frames_per_gop=%d, "
1292                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1293                                         p->ts_pid_pmt,p->ts_pid_audio,
1294                                         p->ts_pid_video,p->ts_pid_pcr,
1295                                         p->ps_size, p->au_sample_rate,
1296                                         p->au_pesid, p->vi_frame_rate,
1297                                         p->vi_frames_per_gop,
1298                                         p->vi_bframes_count, p->vi_pesid);
1299                 break;
1300         }
1301         case VIDIOC_S_MPEGCOMP:
1302         {
1303                 struct v4l2_mpeg_compression *p=arg;
1304                 /*FIXME: Several fields not shown */
1305                 if (!vfd->vidioc_s_mpegcomp)
1306                         break;
1307                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1308                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1309                                 "au_sample_rate=%d, au_pesid=%c, "
1310                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1311                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1312                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1313                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1314                                 p->au_pesid, p->vi_frame_rate,
1315                                 p->vi_frames_per_gop, p->vi_bframes_count,
1316                                 p->vi_pesid);
1317                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1318                 break;
1319         }
1320         case VIDIOC_G_JPEGCOMP:
1321         {
1322                 struct v4l2_jpegcompression *p=arg;
1323                 if (!vfd->vidioc_g_jpegcomp)
1324                         break;
1325                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1326                 if (!ret)
1327                         dbgarg (cmd, "quality=%d, APPn=%d, "
1328                                                 "APP_len=%d, COM_len=%d, "
1329                                                 "jpeg_markers=%d\n",
1330                                                 p->quality,p->APPn,p->APP_len,
1331                                                 p->COM_len,p->jpeg_markers);
1332                 break;
1333         }
1334         case VIDIOC_S_JPEGCOMP:
1335         {
1336                 struct v4l2_jpegcompression *p=arg;
1337                 if (!vfd->vidioc_g_jpegcomp)
1338                         break;
1339                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1340                                         "COM_len=%d, jpeg_markers=%d\n",
1341                                         p->quality,p->APPn,p->APP_len,
1342                                         p->COM_len,p->jpeg_markers);
1343                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1344                 break;
1345         }
1346         case VIDIOC_G_PARM:
1347         {
1348                 struct v4l2_streamparm *p=arg;
1349                 if (vfd->vidioc_g_parm) {
1350                         ret=vfd->vidioc_g_parm(file, fh, p);
1351                 } else {
1352                         struct v4l2_standard s;
1353
1354                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1355                                 return -EINVAL;
1356
1357                         v4l2_video_std_construct(&s, vfd->current_norm,
1358                                                  v4l2_norm_to_name(vfd->current_norm));
1359
1360                         memset(p,0,sizeof(*p));
1361
1362                         p->parm.capture.timeperframe = s.frameperiod;
1363                         ret=0;
1364                 }
1365
1366                 dbgarg (cmd, "type=%d\n", p->type);
1367                 break;
1368         }
1369         case VIDIOC_S_PARM:
1370         {
1371                 struct v4l2_streamparm *p=arg;
1372                 if (!vfd->vidioc_s_parm)
1373                         break;
1374                 dbgarg (cmd, "type=%d\n", p->type);
1375                 ret=vfd->vidioc_s_parm(file, fh, p);
1376                 break;
1377         }
1378         case VIDIOC_G_TUNER:
1379         {
1380                 struct v4l2_tuner *p=arg;
1381                 __u32 index=p->index;
1382
1383                 if (!vfd->vidioc_g_tuner)
1384                         break;
1385
1386                 memset(p,0,sizeof(*p));
1387                 p->index=index;
1388
1389                 ret=vfd->vidioc_g_tuner(file, fh, p);
1390                 if (!ret)
1391                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1392                                         "capability=%d, rangelow=%d, "
1393                                         "rangehigh=%d, signal=%d, afc=%d, "
1394                                         "rxsubchans=%d, audmode=%d\n",
1395                                         p->index, p->name, p->type,
1396                                         p->capability, p->rangelow,
1397                                         p->rangehigh, p->rxsubchans,
1398                                         p->audmode, p->signal, p->afc);
1399                 break;
1400         }
1401         case VIDIOC_S_TUNER:
1402         {
1403                 struct v4l2_tuner *p=arg;
1404                 if (!vfd->vidioc_s_tuner)
1405                         break;
1406                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1407                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1408                                 "signal=%d, afc=%d, rxsubchans=%d, "
1409                                 "audmode=%d\n",p->index, p->name, p->type,
1410                                 p->capability, p->rangelow,p->rangehigh,
1411                                 p->rxsubchans, p->audmode, p->signal,
1412                                 p->afc);
1413                 ret=vfd->vidioc_s_tuner(file, fh, p);
1414                 break;
1415         }
1416         case VIDIOC_G_FREQUENCY:
1417         {
1418                 struct v4l2_frequency *p=arg;
1419                 if (!vfd->vidioc_g_frequency)
1420                         break;
1421
1422                 memset(p,0,sizeof(*p));
1423
1424                 ret=vfd->vidioc_g_frequency(file, fh, p);
1425                 if (!ret)
1426                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1427                                                 p->tuner,p->type,p->frequency);
1428                 break;
1429         }
1430         case VIDIOC_S_FREQUENCY:
1431         {
1432                 struct v4l2_frequency *p=arg;
1433                 if (!vfd->vidioc_s_frequency)
1434                         break;
1435                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1436                                 p->tuner,p->type,p->frequency);
1437                 ret=vfd->vidioc_s_frequency(file, fh, p);
1438                 break;
1439         }
1440         case VIDIOC_G_SLICED_VBI_CAP:
1441         {
1442                 struct v4l2_sliced_vbi_cap *p=arg;
1443                 if (!vfd->vidioc_g_sliced_vbi_cap)
1444                         break;
1445                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1446                 if (!ret)
1447                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1448                 break;
1449         }
1450         case VIDIOC_LOG_STATUS:
1451         {
1452                 if (!vfd->vidioc_log_status)
1453                         break;
1454                 ret=vfd->vidioc_log_status(file, fh);
1455                 break;
1456         }
1457         } /* switch */
1458
1459         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1460                 if (ret<0) {
1461                         printk ("%s: err:\n", vfd->name);
1462                         v4l_print_ioctl(vfd->name, cmd);
1463                 }
1464         }
1465
1466         return ret;
1467 }
1468
1469 int video_ioctl2 (struct inode *inode, struct file *file,
1470                unsigned int cmd, unsigned long arg)
1471 {
1472         char    sbuf[128];
1473         void    *mbuf = NULL;
1474         void    *parg = NULL;
1475         int     err  = -EINVAL;
1476         int     is_ext_ctrl;
1477         size_t  ctrls_size = 0;
1478         void __user *user_ptr = NULL;
1479
1480 #ifdef __OLD_VIDIOC_
1481         cmd = video_fix_command(cmd);
1482 #endif
1483         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1484                        cmd == VIDIOC_TRY_EXT_CTRLS);
1485
1486         /*  Copy arguments into temp kernel buffer  */
1487         switch (_IOC_DIR(cmd)) {
1488         case _IOC_NONE:
1489                 parg = NULL;
1490                 break;
1491         case _IOC_READ:
1492         case _IOC_WRITE:
1493         case (_IOC_WRITE | _IOC_READ):
1494                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1495                         parg = sbuf;
1496                 } else {
1497                         /* too big to allocate from stack */
1498                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1499                         if (NULL == mbuf)
1500                                 return -ENOMEM;
1501                         parg = mbuf;
1502                 }
1503
1504                 err = -EFAULT;
1505                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1506                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1507                                 goto out;
1508                 break;
1509         }
1510
1511         if (is_ext_ctrl) {
1512                 struct v4l2_ext_controls *p = parg;
1513
1514                 /* In case of an error, tell the caller that it wasn't
1515                    a specific control that caused it. */
1516                 p->error_idx = p->count;
1517                 user_ptr = (void __user *)p->controls;
1518                 if (p->count) {
1519                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1520                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1521                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1522                         err = -ENOMEM;
1523                         if (NULL == mbuf)
1524                                 goto out_ext_ctrl;
1525                         err = -EFAULT;
1526                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1527                                 goto out_ext_ctrl;
1528                         p->controls = mbuf;
1529                 }
1530         }
1531
1532         /* Handles IOCTL */
1533         err = __video_do_ioctl(inode, file, cmd, parg);
1534         if (err == -ENOIOCTLCMD)
1535                 err = -EINVAL;
1536         if (is_ext_ctrl) {
1537                 struct v4l2_ext_controls *p = parg;
1538
1539                 p->controls = (void *)user_ptr;
1540                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1541                         err = -EFAULT;
1542                 goto out_ext_ctrl;
1543         }
1544         if (err < 0)
1545                 goto out;
1546
1547 out_ext_ctrl:
1548         /*  Copy results into user buffer  */
1549         switch (_IOC_DIR(cmd))
1550         {
1551         case _IOC_READ:
1552         case (_IOC_WRITE | _IOC_READ):
1553                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1554                         err = -EFAULT;
1555                 break;
1556         }
1557
1558 out:
1559         kfree(mbuf);
1560         return err;
1561 }
1562
1563
1564 static const struct file_operations video_fops;
1565
1566 /**
1567  *      video_register_device - register video4linux devices
1568  *      @vfd:  video device structure we want to register
1569  *      @type: type of device to register
1570  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1571  *             -1 == first free)
1572  *
1573  *      The registration code assigns minor numbers based on the type
1574  *      requested. -ENFILE is returned in all the device slots for this
1575  *      category are full. If not then the minor field is set and the
1576  *      driver initialize function is called (if non %NULL).
1577  *
1578  *      Zero is returned on success.
1579  *
1580  *      Valid types are
1581  *
1582  *      %VFL_TYPE_GRABBER - A frame grabber
1583  *
1584  *      %VFL_TYPE_VTX - A teletext device
1585  *
1586  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1587  *
1588  *      %VFL_TYPE_RADIO - A radio card
1589  */
1590
1591 int video_register_device(struct video_device *vfd, int type, int nr)
1592 {
1593         int i=0;
1594         int base;
1595         int end;
1596         int ret;
1597         char *name_base;
1598
1599         switch(type)
1600         {
1601                 case VFL_TYPE_GRABBER:
1602                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1603                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1604                         name_base = "video";
1605                         break;
1606                 case VFL_TYPE_VTX:
1607                         base=MINOR_VFL_TYPE_VTX_MIN;
1608                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1609                         name_base = "vtx";
1610                         break;
1611                 case VFL_TYPE_VBI:
1612                         base=MINOR_VFL_TYPE_VBI_MIN;
1613                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1614                         name_base = "vbi";
1615                         break;
1616                 case VFL_TYPE_RADIO:
1617                         base=MINOR_VFL_TYPE_RADIO_MIN;
1618                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1619                         name_base = "radio";
1620                         break;
1621                 default:
1622                         printk(KERN_ERR "%s called with unknown type: %d\n",
1623                                __FUNCTION__, type);
1624                         return -1;
1625         }
1626
1627         /* pick a minor number */
1628         mutex_lock(&videodev_lock);
1629         if (nr >= 0  &&  nr < end-base) {
1630                 /* use the one the driver asked for */
1631                 i = base+nr;
1632                 if (NULL != video_device[i]) {
1633                         mutex_unlock(&videodev_lock);
1634                         return -ENFILE;
1635                 }
1636         } else {
1637                 /* use first free */
1638                 for(i=base;i<end;i++)
1639                         if (NULL == video_device[i])
1640                                 break;
1641                 if (i == end) {
1642                         mutex_unlock(&videodev_lock);
1643                         return -ENFILE;
1644                 }
1645         }
1646         video_device[i]=vfd;
1647         vfd->minor=i;
1648         mutex_unlock(&videodev_lock);
1649         mutex_init(&vfd->lock);
1650
1651         /* sysfs class */
1652         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1653         if (vfd->dev)
1654                 vfd->class_dev.dev = vfd->dev;
1655         vfd->class_dev.class       = &video_class;
1656         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1657         sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
1658         ret = class_device_register(&vfd->class_dev);
1659         if (ret < 0) {
1660                 printk(KERN_ERR "%s: class_device_register failed\n",
1661                        __FUNCTION__);
1662                 goto fail_minor;
1663         }
1664         ret = class_device_create_file(&vfd->class_dev, &class_device_attr_name);
1665         if (ret < 0) {
1666                 printk(KERN_ERR "%s: class_device_create_file 'name' failed\n",
1667                        __FUNCTION__);
1668                 goto fail_classdev;
1669         }
1670
1671 #if 1
1672         /* needed until all drivers are fixed */
1673         if (!vfd->release)
1674                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1675                        "Please fix your driver for proper sysfs support, see "
1676                        "http://lwn.net/Articles/36850/\n", vfd->name);
1677 #endif
1678         return 0;
1679
1680 fail_classdev:
1681         class_device_unregister(&vfd->class_dev);
1682 fail_minor:
1683         mutex_lock(&videodev_lock);
1684         video_device[vfd->minor] = NULL;
1685         vfd->minor = -1;
1686         mutex_unlock(&videodev_lock);
1687         return ret;
1688 }
1689
1690 /**
1691  *      video_unregister_device - unregister a video4linux device
1692  *      @vfd: the device to unregister
1693  *
1694  *      This unregisters the passed device and deassigns the minor
1695  *      number. Future open calls will be met with errors.
1696  */
1697
1698 void video_unregister_device(struct video_device *vfd)
1699 {
1700         mutex_lock(&videodev_lock);
1701         if(video_device[vfd->minor]!=vfd)
1702                 panic("videodev: bad unregister");
1703
1704         video_device[vfd->minor]=NULL;
1705         class_device_unregister(&vfd->class_dev);
1706         mutex_unlock(&videodev_lock);
1707 }
1708
1709 /*
1710  * Video fs operations
1711  */
1712 static const struct file_operations video_fops=
1713 {
1714         .owner          = THIS_MODULE,
1715         .llseek         = no_llseek,
1716         .open           = video_open,
1717 };
1718
1719 /*
1720  *      Initialise video for linux
1721  */
1722
1723 static int __init videodev_init(void)
1724 {
1725         int ret;
1726
1727         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1728         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1729                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1730                 return -EIO;
1731         }
1732
1733         ret = class_register(&video_class);
1734         if (ret < 0) {
1735                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1736                 printk(KERN_WARNING "video_dev: class_register failed\n");
1737                 return -EIO;
1738         }
1739
1740         return 0;
1741 }
1742
1743 static void __exit videodev_exit(void)
1744 {
1745         class_unregister(&video_class);
1746         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1747 }
1748
1749 module_init(videodev_init)
1750 module_exit(videodev_exit)
1751
1752 EXPORT_SYMBOL(video_register_device);
1753 EXPORT_SYMBOL(video_unregister_device);
1754 EXPORT_SYMBOL(video_devdata);
1755 EXPORT_SYMBOL(video_usercopy);
1756 EXPORT_SYMBOL(video_exclusive_open);
1757 EXPORT_SYMBOL(video_exclusive_release);
1758 EXPORT_SYMBOL(video_ioctl2);
1759 EXPORT_SYMBOL(video_device_alloc);
1760 EXPORT_SYMBOL(video_device_release);
1761
1762 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1763 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1764 MODULE_LICENSE("GPL");
1765
1766
1767 /*
1768  * Local variables:
1769  * c-basic-offset: 8
1770  * End:
1771  */