drivers/media/video/videodev.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  *      A generic video device interface for the LINUX operating system
   5  *      using a set of device structures/vectors for low level operations.
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  *
  12  * Authors:     Alan Cox, <alan@redhat.com> (version 1)
  13  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  14  *
  15  * Fixes:       20000516  Claudio Matsuoka <claudio@conectiva.com>
  16  *              - Added procfs support
  17  */
  18
  19 #define dbgarg(cmd, fmt, arg...) \
  20                 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {                \
  21                         printk (KERN_DEBUG "%s: ",  vfd->name);         \
  22                         v4l_printk_ioctl(cmd);                          \
  23                         printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg); \
  24                 }
  25
  26 #define dbgarg2(fmt, arg...) \
  27                 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)                  \
  28                         printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg);
  29
  30 #include <linux/module.h>
  31 #include <linux/types.h>
  32 #include <linux/kernel.h>
  33 #include <linux/mm.h>
  34 #include <linux/string.h>
  35 #include <linux/errno.h>
  36 #include <linux/init.h>
  37 #include <linux/kmod.h>
  38 #include <linux/slab.h>
  39 #include <asm/uaccess.h>
  40 #include <asm/system.h>
  41
  42 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
  43 #include <linux/videodev2.h>
  44
  45 #ifdef CONFIG_VIDEO_V4L1
  46 #include <linux/videodev.h>
  47 #endif
  48 #include <media/v4l2-common.h>
  49 #include <linux/video_decoder.h>
  50
  51 #define VIDEO_NUM_DEVICES       256
  52 #define VIDEO_NAME              "video4linux"
  53
  54 /* video4linux standard ID conversion to standard name
  55  */
  56 char *v4l2_norm_to_name(v4l2_std_id id)
  57 {
  58         char *name;
  59         u32 myid = id;
  60
  61         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  62            64 bit comparations. So, on that architecture, with some gcc
  63            variants, compilation fails. Currently, the max value is 30bit wide.
  64          */
  65         BUG_ON(myid != id);
  66
  67         switch (myid) {
  68         case V4L2_STD_PAL:
  69                 name = "PAL";
  70                 break;
  71         case V4L2_STD_PAL_BG:
  72                 name = "PAL-BG";
  73                 break;
  74         case V4L2_STD_PAL_DK:
  75                 name = "PAL-DK";
  76                 break;
  77         case V4L2_STD_PAL_B:
  78                 name = "PAL-B";
  79                 break;
  80         case V4L2_STD_PAL_B1:
  81                 name = "PAL-B1";
  82                 break;
  83         case V4L2_STD_PAL_G:
  84                 name = "PAL-G";
  85                 break;
  86         case V4L2_STD_PAL_H:
  87                 name = "PAL-H";
  88                 break;
  89         case V4L2_STD_PAL_I:
  90                 name = "PAL-I";
  91                 break;
  92         case V4L2_STD_PAL_D:
  93                 name = "PAL-D";
  94                 break;
  95         case V4L2_STD_PAL_D1:
  96                 name = "PAL-D1";
  97                 break;
  98         case V4L2_STD_PAL_K:
  99                 name = "PAL-K";
 100                 break;
 101         case V4L2_STD_PAL_M:
 102                 name = "PAL-M";
 103                 break;
 104         case V4L2_STD_PAL_N:
 105                 name = "PAL-N";
 106                 break;
 107         case V4L2_STD_PAL_Nc:
 108                 name = "PAL-Nc";
 109                 break;
 110         case V4L2_STD_PAL_60:
 111                 name = "PAL-60";
 112                 break;
 113         case V4L2_STD_NTSC:
 114                 name = "NTSC";
 115                 break;
 116         case V4L2_STD_NTSC_M:
 117                 name = "NTSC-M";
 118                 break;
 119         case V4L2_STD_NTSC_M_JP:
 120                 name = "NTSC-M-JP";
 121                 break;
 122         case V4L2_STD_NTSC_443:
 123                 name = "NTSC-443";
 124                 break;
 125         case V4L2_STD_NTSC_M_KR:
 126                 name = "NTSC-M-KR";
 127                 break;
 128         case V4L2_STD_SECAM:
 129                 name = "SECAM";
 130                 break;
 131         case V4L2_STD_SECAM_DK:
 132                 name = "SECAM-DK";
 133                 break;
 134         case V4L2_STD_SECAM_B:
 135                 name = "SECAM-B";
 136                 break;
 137         case V4L2_STD_SECAM_D:
 138                 name = "SECAM-D";
 139                 break;
 140         case V4L2_STD_SECAM_G:
 141                 name = "SECAM-G";
 142                 break;
 143         case V4L2_STD_SECAM_H:
 144                 name = "SECAM-H";
 145                 break;
 146         case V4L2_STD_SECAM_K:
 147                 name = "SECAM-K";
 148                 break;
 149         case V4L2_STD_SECAM_K1:
 150                 name = "SECAM-K1";
 151                 break;
 152         case V4L2_STD_SECAM_L:
 153                 name = "SECAM-L";
 154                 break;
 155         case V4L2_STD_SECAM_LC:
 156                 name = "SECAM-LC";
 157                 break;
 158         default:
 159                 name = "Unknown";
 160                 break;
 161         }
 162
 163         return name;
 164 }
 165 EXPORT_SYMBOL(v4l2_norm_to_name);
 166
 167 /* Fill in the fields of a v4l2_standard structure according to the
 168    'id' and 'transmission' parameters.  Returns negative on error.  */
 169 int v4l2_video_std_construct(struct v4l2_standard *vs,
 170                              int id, char *name)
 171 {
 172         u32 index = vs->index;
 173
 174         memset(vs, 0, sizeof(struct v4l2_standard));
 175         vs->index = index;
 176         vs->id    = id;
 177         if (id & V4L2_STD_525_60) {
 178                 vs->frameperiod.numerator = 1001;
 179                 vs->frameperiod.denominator = 30000;
 180                 vs->framelines = 525;
 181         } else {
 182                 vs->frameperiod.numerator = 1;
 183                 vs->frameperiod.denominator = 25;
 184                 vs->framelines = 625;
 185         }
 186         strlcpy(vs->name, name, sizeof(vs->name));
 187         return 0;
 188 }
 189 EXPORT_SYMBOL(v4l2_video_std_construct);
 190
 191 /* ----------------------------------------------------------------- */
 192 /* some arrays for pretty-printing debug messages of enum types      */
 193
 194 char *v4l2_field_names[] = {
 195         [V4L2_FIELD_ANY]        = "any",
 196         [V4L2_FIELD_NONE]       = "none",
 197         [V4L2_FIELD_TOP]        = "top",
 198         [V4L2_FIELD_BOTTOM]     = "bottom",
 199         [V4L2_FIELD_INTERLACED] = "interlaced",
 200         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 201         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 202         [V4L2_FIELD_ALTERNATE]  = "alternate",
 203         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 204         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 205 };
 206 EXPORT_SYMBOL(v4l2_field_names);
 207
 208 char *v4l2_type_names[] = {
 209         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
 210         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
 211         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
 212         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 213         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 214         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 215         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 216         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
 217 };
 218 EXPORT_SYMBOL(v4l2_type_names);
 219
 220 static char *v4l2_memory_names[] = {
 221         [V4L2_MEMORY_MMAP]    = "mmap",
 222         [V4L2_MEMORY_USERPTR] = "userptr",
 223         [V4L2_MEMORY_OVERLAY] = "overlay",
 224 };
 225
 226 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 227                            arr[a] : "unknown")
 228
 229 /* ------------------------------------------------------------------ */
 230 /* debug help functions                                               */
 231
 232 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 233 static const char *v4l1_ioctls[] = {
 234         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
 235         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
 236         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
 237         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
 238         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
 239         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
 240         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
 241         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
 242         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
 243         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
 244         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
 245         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
 246         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
 247         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
 248         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
 249         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
 250         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
 251         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
 252         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
 253         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
 254         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
 255         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
 256         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
 257         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
 258         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
 259         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
 260         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
 261         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
 262         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
 263 };
 264 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
 265 #endif
 266
 267 static const char *v4l2_ioctls[] = {
 268         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 269         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 270         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 271         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 272         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 273         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 274         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 275         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 276         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 277         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 278         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 279         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 280         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 281         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 282         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 283         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 284         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 285         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 286         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 287         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 288         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 289         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 290         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 291         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 292         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 293         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 294         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 295         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 296         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 297         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 298         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 299         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 300         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 301         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 302         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 303         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 304         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 305         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 306         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 307         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 308         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 309         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 310         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 311         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 312         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 313         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 314         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 315         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 316         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 317         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 318         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 319         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 320         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 321         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 322         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 323 #if 1
 324         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 325         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 326         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 327         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 328         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 329
 330         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 331         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 332
 333         [_IOC_NR(VIDIOC_G_CHIP_IDENT)]     = "VIDIOC_G_CHIP_IDENT",
 334 #endif
 335 };
 336 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 337
 338 static const char *v4l2_int_ioctls[] = {
 339 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 340         [_IOC_NR(DECODER_GET_CAPABILITIES)]    = "DECODER_GET_CAPABILITIES",
 341         [_IOC_NR(DECODER_GET_STATUS)]          = "DECODER_GET_STATUS",
 342         [_IOC_NR(DECODER_SET_NORM)]            = "DECODER_SET_NORM",
 343         [_IOC_NR(DECODER_SET_INPUT)]           = "DECODER_SET_INPUT",
 344         [_IOC_NR(DECODER_SET_OUTPUT)]          = "DECODER_SET_OUTPUT",
 345         [_IOC_NR(DECODER_ENABLE_OUTPUT)]       = "DECODER_ENABLE_OUTPUT",
 346         [_IOC_NR(DECODER_SET_PICTURE)]         = "DECODER_SET_PICTURE",
 347         [_IOC_NR(DECODER_SET_GPIO)]            = "DECODER_SET_GPIO",
 348         [_IOC_NR(DECODER_INIT)]                = "DECODER_INIT",
 349         [_IOC_NR(DECODER_SET_VBI_BYPASS)]      = "DECODER_SET_VBI_BYPASS",
 350         [_IOC_NR(DECODER_DUMP)]                = "DECODER_DUMP",
 351 #endif
 352         [_IOC_NR(AUDC_SET_RADIO)]              = "AUDC_SET_RADIO",
 353
 354         [_IOC_NR(TUNER_SET_TYPE_ADDR)]         = "TUNER_SET_TYPE_ADDR",
 355         [_IOC_NR(TUNER_SET_STANDBY)]           = "TUNER_SET_STANDBY",
 356         [_IOC_NR(TUNER_SET_CONFIG)]            = "TUNER_SET_CONFIG",
 357
 358         [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)]     = "VIDIOC_INT_S_TUNER_MODE",
 359         [_IOC_NR(VIDIOC_INT_RESET)]            = "VIDIOC_INT_RESET",
 360         [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
 361         [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)]  = "VIDIOC_INT_DECODE_VBI_LINE",
 362         [_IOC_NR(VIDIOC_INT_S_VBI_DATA)]       = "VIDIOC_INT_S_VBI_DATA",
 363         [_IOC_NR(VIDIOC_INT_G_VBI_DATA)]       = "VIDIOC_INT_G_VBI_DATA",
 364         [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)]   = "VIDIOC_INT_I2S_CLOCK_FREQ",
 365         [_IOC_NR(VIDIOC_INT_S_STANDBY)]        = "VIDIOC_INT_S_STANDBY",
 366         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
 367         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
 368         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
 369         [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
 370         [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ",
 371         [_IOC_NR(VIDIOC_INT_INIT)]             = "VIDIOC_INT_INIT",
 372         [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)]     = "VIDIOC_INT_G_STD_OUTPUT",
 373         [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)]     = "VIDIOC_INT_S_STD_OUTPUT",
 374 };
 375 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 376
 377 /* Common ioctl debug function. This function can be used by
 378    external ioctl messages as well as internal V4L ioctl */
 379 void v4l_printk_ioctl(unsigned int cmd)
 380 {
 381         char *dir;
 382
 383         switch (_IOC_DIR(cmd)) {
 384         case _IOC_NONE:              dir = "--"; break;
 385         case _IOC_READ:              dir = "r-"; break;
 386         case _IOC_WRITE:             dir = "-w"; break;
 387         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 388         default:                     dir = "*ERR*"; break;
 389         }
 390         switch (_IOC_TYPE(cmd)) {
 391         case 'd':
 392                 printk("v4l2_int ioctl %s, dir=%s (0x%08x)\n",
 393                        (_IOC_NR(cmd) < V4L2_INT_IOCTLS) ?
 394                        v4l2_int_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
 395                 break;
 396 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 397         case 'v':
 398                 printk("v4l1 ioctl %s, dir=%s (0x%08x)\n",
 399                        (_IOC_NR(cmd) < V4L1_IOCTLS) ?
 400                        v4l1_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
 401                 break;
 402 #endif
 403         case 'V':
 404                 printk("v4l2 ioctl %s, dir=%s (0x%08x)\n",
 405                        (_IOC_NR(cmd) < V4L2_IOCTLS) ?
 406                        v4l2_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
 407                 break;
 408
 409         default:
 410                 printk("unknown ioctl '%c', dir=%s, #%d (0x%08x)\n",
 411                        _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 412         }
 413 }
 414 EXPORT_SYMBOL(v4l_printk_ioctl);
 415
 416 /*
 417  *      sysfs stuff
 418  */
 419
 420 static ssize_t show_name(struct device *cd,
 421                          struct device_attribute *attr, char *buf)
 422 {
 423         struct video_device *vfd = container_of(cd, struct video_device,
 424                                                 class_dev);
 425         return sprintf(buf, "%.*s\n", (int)sizeof(vfd->name), vfd->name);
 426 }
 427
 428 struct video_device *video_device_alloc(void)
 429 {
 430         struct video_device *vfd;
 431
 432         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
 433         return vfd;
 434 }
 435 EXPORT_SYMBOL(video_device_alloc);
 436
 437 void video_device_release(struct video_device *vfd)
 438 {
 439         kfree(vfd);
 440 }
 441 EXPORT_SYMBOL(video_device_release);
 442
 443 static void video_release(struct device *cd)
 444 {
 445         struct video_device *vfd = container_of(cd, struct video_device,
 446                                                                 class_dev);
 447
 448 #if 1
 449         /* needed until all drivers are fixed */
 450         if (!vfd->release)
 451                 return;
 452 #endif
 453         vfd->release(vfd);
 454 }
 455
 456 static struct device_attribute video_device_attrs[] = {
 457         __ATTR(name, S_IRUGO, show_name, NULL),
 458         __ATTR_NULL
 459 };
 460
 461 static struct class video_class = {
 462         .name    = VIDEO_NAME,
 463         .dev_attrs = video_device_attrs,
 464         .dev_release = video_release,
 465 };
 466
 467 /*
 468  *      Active devices
 469  */
 470
 471 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 472 static DEFINE_MUTEX(videodev_lock);
 473
 474 struct video_device* video_devdata(struct file *file)
 475 {
 476         return video_device[iminor(file->f_path.dentry->d_inode)];
 477 }
 478 EXPORT_SYMBOL(video_devdata);
 479
 480 /*
 481  *      Open a video device - FIXME: Obsoleted
 482  */
 483 static int video_open(struct inode *inode, struct file *file)
 484 {
 485         unsigned int minor = iminor(inode);
 486         int err = 0;
 487         struct video_device *vfl;
 488         const struct file_operations *old_fops;
 489
 490         if(minor>=VIDEO_NUM_DEVICES)
 491                 return -ENODEV;
 492         mutex_lock(&videodev_lock);
 493         vfl=video_device[minor];
 494         if(vfl==NULL) {
 495                 mutex_unlock(&videodev_lock);
 496                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 497                 mutex_lock(&videodev_lock);
 498                 vfl=video_device[minor];
 499                 if (vfl==NULL) {
 500                         mutex_unlock(&videodev_lock);
 501                         return -ENODEV;
 502                 }
 503         }
 504         old_fops = file->f_op;
 505         file->f_op = fops_get(vfl->fops);
 506         if(file->f_op->open)
 507                 err = file->f_op->open(inode,file);
 508         if (err) {
 509                 fops_put(file->f_op);
 510                 file->f_op = fops_get(old_fops);
 511         }
 512         fops_put(old_fops);
 513         mutex_unlock(&videodev_lock);
 514         return err;
 515 }
 516
 517 /*
 518  * helper function -- handles userspace copying for ioctl arguments
 519  */
 520
 521 #ifdef __OLD_VIDIOC_
 522 static unsigned int
 523 video_fix_command(unsigned int cmd)
 524 {
 525         switch (cmd) {
 526         case VIDIOC_OVERLAY_OLD:
 527                 cmd = VIDIOC_OVERLAY;
 528                 break;
 529         case VIDIOC_S_PARM_OLD:
 530                 cmd = VIDIOC_S_PARM;
 531                 break;
 532         case VIDIOC_S_CTRL_OLD:
 533                 cmd = VIDIOC_S_CTRL;
 534                 break;
 535         case VIDIOC_G_AUDIO_OLD:
 536                 cmd = VIDIOC_G_AUDIO;
 537                 break;
 538         case VIDIOC_G_AUDOUT_OLD:
 539                 cmd = VIDIOC_G_AUDOUT;
 540                 break;
 541         case VIDIOC_CROPCAP_OLD:
 542                 cmd = VIDIOC_CROPCAP;
 543                 break;
 544         }
 545         return cmd;
 546 }
 547 #endif
 548
 549 /*
 550  * Obsolete usercopy function - Should be removed soon
 551  */
 552 int
 553 video_usercopy(struct inode *inode, struct file *file,
 554                unsigned int cmd, unsigned long arg,
 555                int (*func)(struct inode *inode, struct file *file,
 556                            unsigned int cmd, void *arg))
 557 {
 558         char    sbuf[128];
 559         void    *mbuf = NULL;
 560         void    *parg = NULL;
 561         int     err  = -EINVAL;
 562         int     is_ext_ctrl;
 563         size_t  ctrls_size = 0;
 564         void __user *user_ptr = NULL;
 565
 566 #ifdef __OLD_VIDIOC_
 567         cmd = video_fix_command(cmd);
 568 #endif
 569         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 570                        cmd == VIDIOC_TRY_EXT_CTRLS);
 571
 572         /*  Copy arguments into temp kernel buffer  */
 573         switch (_IOC_DIR(cmd)) {
 574         case _IOC_NONE:
 575                 parg = NULL;
 576                 break;
 577         case _IOC_READ:
 578         case _IOC_WRITE:
 579         case (_IOC_WRITE | _IOC_READ):
 580                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 581                         parg = sbuf;
 582                 } else {
 583                         /* too big to allocate from stack */
 584                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 585                         if (NULL == mbuf)
 586                                 return -ENOMEM;
 587                         parg = mbuf;
 588                 }
 589
 590                 err = -EFAULT;
 591                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 592                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 593                                 goto out;
 594                 break;
 595         }
 596         if (is_ext_ctrl) {
 597                 struct v4l2_ext_controls *p = parg;
 598
 599                 /* In case of an error, tell the caller that it wasn't
 600                    a specific control that caused it. */
 601                 p->error_idx = p->count;
 602                 user_ptr = (void __user *)p->controls;
 603                 if (p->count) {
 604                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 605                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 606                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 607                         err = -ENOMEM;
 608                         if (NULL == mbuf)
 609                                 goto out_ext_ctrl;
 610                         err = -EFAULT;
 611                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 612                                 goto out_ext_ctrl;
 613                         p->controls = mbuf;
 614                 }
 615         }
 616
 617         /* call driver */
 618         err = func(inode, file, cmd, parg);
 619         if (err == -ENOIOCTLCMD)
 620                 err = -EINVAL;
 621         if (is_ext_ctrl) {
 622                 struct v4l2_ext_controls *p = parg;
 623
 624                 p->controls = (void *)user_ptr;
 625                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 626                         err = -EFAULT;
 627                 goto out_ext_ctrl;
 628         }
 629         if (err < 0)
 630                 goto out;
 631
 632 out_ext_ctrl:
 633         /*  Copy results into user buffer  */
 634         switch (_IOC_DIR(cmd))
 635         {
 636         case _IOC_READ:
 637         case (_IOC_WRITE | _IOC_READ):
 638                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 639                         err = -EFAULT;
 640                 break;
 641         }
 642
 643 out:
 644         kfree(mbuf);
 645         return err;
 646 }
 647 EXPORT_SYMBOL(video_usercopy);
 648
 649 /*
 650  * open/release helper functions -- handle exclusive opens
 651  * Should be removed soon
 652  */
 653 int video_exclusive_open(struct inode *inode, struct file *file)
 654 {
 655         struct  video_device *vfl = video_devdata(file);
 656         int retval = 0;
 657
 658         mutex_lock(&vfl->lock);
 659         if (vfl->users) {
 660                 retval = -EBUSY;
 661         } else {
 662                 vfl->users++;
 663         }
 664         mutex_unlock(&vfl->lock);
 665         return retval;
 666 }
 667 EXPORT_SYMBOL(video_exclusive_open);
 668
 669 int video_exclusive_release(struct inode *inode, struct file *file)
 670 {
 671         struct  video_device *vfl = video_devdata(file);
 672
 673         vfl->users--;
 674         return 0;
 675 }
 676 EXPORT_SYMBOL(video_exclusive_release);
 677
 678 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 679                                         struct v4l2_buffer *p)
 680 {
 681         struct v4l2_timecode *tc=&p->timecode;
 682
 683         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 684                 "bytesused=%d, flags=0x%08d, "
 685                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 686                         (p->timestamp.tv_sec/3600),
 687                         (int)(p->timestamp.tv_sec/60)%60,
 688                         (int)(p->timestamp.tv_sec%60),
 689                         p->timestamp.tv_usec,
 690                         p->index,
 691                         prt_names(p->type, v4l2_type_names),
 692                         p->bytesused, p->flags,
 693                         p->field, p->sequence,
 694                         prt_names(p->memory, v4l2_memory_names),
 695                         p->m.userptr, p->length);
 696         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
 697                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 698                         tc->hours,tc->minutes,tc->seconds,
 699                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 700 }
 701
 702 static inline void dbgrect(struct video_device *vfd, char *s,
 703                                                         struct v4l2_rect *r)
 704 {
 705         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
 706                                                 r->width, r->height);
 707 };
 708
 709 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 710                                                 struct v4l2_pix_format *fmt)
 711 {
 712         dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 713                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 714                 fmt->width,fmt->height,
 715                 (fmt->pixelformat & 0xff),
 716                 (fmt->pixelformat >>  8) & 0xff,
 717                 (fmt->pixelformat >> 16) & 0xff,
 718                 (fmt->pixelformat >> 24) & 0xff,
 719                 prt_names(fmt->field, v4l2_field_names),
 720                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 721 };
 722
 723
 724 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 725 {
 726         switch (type) {
 727         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 728                 if (vfd->vidioc_try_fmt_cap)
 729                         return (0);
 730                 break;
 731         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 732                 if (vfd->vidioc_try_fmt_overlay)
 733                         return (0);
 734                 break;
 735         case V4L2_BUF_TYPE_VBI_CAPTURE:
 736                 if (vfd->vidioc_try_fmt_vbi)
 737                         return (0);
 738                 break;
 739         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 740                 if (vfd->vidioc_try_fmt_vbi_output)
 741                         return (0);
 742                 break;
 743         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 744                 if (vfd->vidioc_try_fmt_vbi_capture)
 745                         return (0);
 746                 break;
 747         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 748                 if (vfd->vidioc_try_fmt_video_output)
 749                         return (0);
 750                 break;
 751         case V4L2_BUF_TYPE_VBI_OUTPUT:
 752                 if (vfd->vidioc_try_fmt_vbi_output)
 753                         return (0);
 754                 break;
 755         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 756                 if (vfd->vidioc_try_fmt_output_overlay)
 757                         return (0);
 758                 break;
 759         case V4L2_BUF_TYPE_PRIVATE:
 760                 if (vfd->vidioc_try_fmt_type_private)
 761                         return (0);
 762                 break;
 763         }
 764         return (-EINVAL);
 765 }
 766
 767 static int __video_do_ioctl(struct inode *inode, struct file *file,
 768                 unsigned int cmd, void *arg)
 769 {
 770         struct video_device *vfd = video_devdata(file);
 771         void                 *fh = file->private_data;
 772         int                  ret = -EINVAL;
 773
 774         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 775                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 776                 v4l_print_ioctl(vfd->name, cmd);
 777         }
 778
 779 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 780         /***********************************************************
 781          Handles calls to the obsoleted V4L1 API
 782          Due to the nature of VIDIOCGMBUF, each driver that supports
 783          V4L1 should implement its own handler for this ioctl.
 784          ***********************************************************/
 785
 786         /* --- streaming capture ------------------------------------- */
 787         if (cmd == VIDIOCGMBUF) {
 788                 struct video_mbuf *p=arg;
 789
 790                 memset(p, 0, sizeof(*p));
 791
 792                 if (!vfd->vidiocgmbuf)
 793                         return ret;
 794                 ret=vfd->vidiocgmbuf(file, fh, p);
 795                 if (!ret)
 796                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 797                                                 p->size, p->frames,
 798                                                 (unsigned long)p->offsets);
 799                 return ret;
 800         }
 801
 802         /********************************************************
 803          All other V4L1 calls are handled by v4l1_compat module.
 804          Those calls will be translated into V4L2 calls, and
 805          __video_do_ioctl will be called again, with one or more
 806          V4L2 ioctls.
 807          ********************************************************/
 808         if (_IOC_TYPE(cmd)=='v')
 809                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 810                                                 __video_do_ioctl);
 811 #endif
 812
 813         switch(cmd) {
 814         /* --- capabilities ------------------------------------------ */
 815         case VIDIOC_QUERYCAP:
 816         {
 817                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 818                 memset(cap, 0, sizeof(*cap));
 819
 820                 if (!vfd->vidioc_querycap)
 821                         break;
 822
 823                 ret=vfd->vidioc_querycap(file, fh, cap);
 824                 if (!ret)
 825                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 826                                         "version=0x%08x, "
 827                                         "capabilities=0x%08x\n",
 828                                         cap->driver,cap->card,cap->bus_info,
 829                                         cap->version,
 830                                         cap->capabilities);
 831                 break;
 832         }
 833
 834         /* --- priority ------------------------------------------ */
 835         case VIDIOC_G_PRIORITY:
 836         {
 837                 enum v4l2_priority *p=arg;
 838
 839                 if (!vfd->vidioc_g_priority)
 840                         break;
 841                 ret=vfd->vidioc_g_priority(file, fh, p);
 842                 if (!ret)
 843                         dbgarg(cmd, "priority is %d\n", *p);
 844                 break;
 845         }
 846         case VIDIOC_S_PRIORITY:
 847         {
 848                 enum v4l2_priority *p=arg;
 849
 850                 if (!vfd->vidioc_s_priority)
 851                         break;
 852                 dbgarg(cmd, "setting priority to %d\n", *p);
 853                 ret=vfd->vidioc_s_priority(file, fh, *p);
 854                 break;
 855         }
 856
 857         /* --- capture ioctls ---------------------------------------- */
 858         case VIDIOC_ENUM_FMT:
 859         {
 860                 struct v4l2_fmtdesc *f = arg;
 861                 enum v4l2_buf_type type;
 862                 unsigned int index;
 863
 864                 index = f->index;
 865                 type  = f->type;
 866                 memset(f,0,sizeof(*f));
 867                 f->index = index;
 868                 f->type  = type;
 869
 870                 switch (type) {
 871                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 872                         if (vfd->vidioc_enum_fmt_cap)
 873                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 874                         break;
 875                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 876                         if (vfd->vidioc_enum_fmt_overlay)
 877                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 878                         break;
 879                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 880                         if (vfd->vidioc_enum_fmt_vbi)
 881                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 882                         break;
 883                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 884                         if (vfd->vidioc_enum_fmt_vbi_output)
 885                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 886                                                                 fh, f);
 887                         break;
 888                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 889                         if (vfd->vidioc_enum_fmt_vbi_capture)
 890                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 891                                                                 fh, f);
 892                         break;
 893                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 894                         if (vfd->vidioc_enum_fmt_video_output)
 895                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 896                                                                 fh, f);
 897                         break;
 898                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 899                         if (vfd->vidioc_enum_fmt_vbi_output)
 900                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 901                                                                 fh, f);
 902                         break;
 903                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 904                         if (vfd->vidioc_enum_fmt_output_overlay)
 905                                 ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
 906                         break;
 907                 case V4L2_BUF_TYPE_PRIVATE:
 908                         if (vfd->vidioc_enum_fmt_type_private)
 909                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 910                                                                 fh, f);
 911                         break;
 912                 }
 913                 if (!ret)
 914                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 915                                         "pixelformat=%c%c%c%c, description='%s'\n",
 916                                         f->index, f->type, f->flags,
 917                                         (f->pixelformat & 0xff),
 918                                         (f->pixelformat >>  8) & 0xff,
 919                                         (f->pixelformat >> 16) & 0xff,
 920                                         (f->pixelformat >> 24) & 0xff,
 921                                         f->description);
 922                 break;
 923         }
 924         case VIDIOC_G_FMT:
 925         {
 926                 struct v4l2_format *f = (struct v4l2_format *)arg;
 927                 enum v4l2_buf_type type=f->type;
 928
 929                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
 930                 f->type=type;
 931
 932                 /* FIXME: Should be one dump per type */
 933                 dbgarg (cmd, "type=%s\n", prt_names(type,
 934                                         v4l2_type_names));
 935
 936                 switch (type) {
 937                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 938                         if (vfd->vidioc_g_fmt_cap)
 939                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 940                         if (!ret)
 941                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 942                         break;
 943                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 944                         if (vfd->vidioc_g_fmt_overlay)
 945                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 946                         break;
 947                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 948                         if (vfd->vidioc_g_fmt_vbi)
 949                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 950                         break;
 951                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 952                         if (vfd->vidioc_g_fmt_vbi_output)
 953                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 954                         break;
 955                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 956                         if (vfd->vidioc_g_fmt_vbi_capture)
 957                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 958                         break;
 959                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 960                         if (vfd->vidioc_g_fmt_video_output)
 961                                 ret=vfd->vidioc_g_fmt_video_output(file,
 962                                                                 fh, f);
 963                         break;
 964                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 965                         if (vfd->vidioc_g_fmt_output_overlay)
 966                                 ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
 967                         break;
 968                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 969                         if (vfd->vidioc_g_fmt_vbi_output)
 970                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 971                         break;
 972                 case V4L2_BUF_TYPE_PRIVATE:
 973                         if (vfd->vidioc_g_fmt_type_private)
 974                                 ret=vfd->vidioc_g_fmt_type_private(file,
 975                                                                 fh, f);
 976                         break;
 977                 }
 978
 979                 break;
 980         }
 981         case VIDIOC_S_FMT:
 982         {
 983                 struct v4l2_format *f = (struct v4l2_format *)arg;
 984
 985                 /* FIXME: Should be one dump per type */
 986                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 987                                         v4l2_type_names));
 988
 989                 switch (f->type) {
 990                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 991                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 992                         if (vfd->vidioc_s_fmt_cap)
 993                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 994                         break;
 995                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 996                         if (vfd->vidioc_s_fmt_overlay)
 997                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 998                         break;
 999                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1000                         if (vfd->vidioc_s_fmt_vbi)
1001                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
1002                         break;
1003                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1004                         if (vfd->vidioc_s_fmt_vbi_output)
1005                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
1006                         break;
1007                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1008                         if (vfd->vidioc_s_fmt_vbi_capture)
1009                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
1010                         break;
1011                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1012                         if (vfd->vidioc_s_fmt_video_output)
1013                                 ret=vfd->vidioc_s_fmt_video_output(file,
1014                                                                 fh, f);
1015                         break;
1016                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1017                         if (vfd->vidioc_s_fmt_output_overlay)
1018                                 ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
1019                         break;
1020                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1021                         if (vfd->vidioc_s_fmt_vbi_output)
1022                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
1023                                                                 fh, f);
1024                         break;
1025                 case V4L2_BUF_TYPE_PRIVATE:
1026                         if (vfd->vidioc_s_fmt_type_private)
1027                                 ret=vfd->vidioc_s_fmt_type_private(file,
1028                                                                 fh, f);
1029                         break;
1030                 }
1031                 break;
1032         }
1033         case VIDIOC_TRY_FMT:
1034         {
1035                 struct v4l2_format *f = (struct v4l2_format *)arg;
1036
1037                 /* FIXME: Should be one dump per type */
1038                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
1039                                                 v4l2_type_names));
1040                 switch (f->type) {
1041                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1042                         if (vfd->vidioc_try_fmt_cap)
1043                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
1044                         if (!ret)
1045                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
1046                         break;
1047                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1048                         if (vfd->vidioc_try_fmt_overlay)
1049                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
1050                         break;
1051                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1052                         if (vfd->vidioc_try_fmt_vbi)
1053                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
1054                         break;
1055                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1056                         if (vfd->vidioc_try_fmt_vbi_output)
1057                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
1058                                                                 fh, f);
1059                         break;
1060                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1061                         if (vfd->vidioc_try_fmt_vbi_capture)
1062                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
1063                                                                 fh, f);
1064                         break;
1065                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1066                         if (vfd->vidioc_try_fmt_video_output)
1067                                 ret=vfd->vidioc_try_fmt_video_output(file,
1068                                                                 fh, f);
1069                         break;
1070                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1071                         if (vfd->vidioc_try_fmt_output_overlay)
1072                                 ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
1073                         break;
1074                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1075                         if (vfd->vidioc_try_fmt_vbi_output)
1076                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
1077                                                                 fh, f);
1078                         break;
1079                 case V4L2_BUF_TYPE_PRIVATE:
1080                         if (vfd->vidioc_try_fmt_type_private)
1081                                 ret=vfd->vidioc_try_fmt_type_private(file,
1082                                                                 fh, f);
1083                         break;
1084                 }
1085
1086                 break;
1087         }
1088         /* FIXME: Those buf reqs could be handled here,
1089            with some changes on videobuf to allow its header to be included at
1090            videodev2.h or being merged at videodev2.
1091          */
1092         case VIDIOC_REQBUFS:
1093         {
1094                 struct v4l2_requestbuffers *p=arg;
1095
1096                 if (!vfd->vidioc_reqbufs)
1097                         break;
1098                 ret = check_fmt (vfd, p->type);
1099                 if (ret)
1100                         break;
1101
1102                 ret=vfd->vidioc_reqbufs(file, fh, p);
1103                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
1104                                 p->count,
1105                                 prt_names(p->type, v4l2_type_names),
1106                                 prt_names(p->memory, v4l2_memory_names));
1107                 break;
1108         }
1109         case VIDIOC_QUERYBUF:
1110         {
1111                 struct v4l2_buffer *p=arg;
1112
1113                 if (!vfd->vidioc_querybuf)
1114                         break;
1115                 ret = check_fmt (vfd, p->type);
1116                 if (ret)
1117                         break;
1118
1119                 ret=vfd->vidioc_querybuf(file, fh, p);
1120                 if (!ret)
1121                         dbgbuf(cmd,vfd,p);
1122                 break;
1123         }
1124         case VIDIOC_QBUF:
1125         {
1126                 struct v4l2_buffer *p=arg;
1127
1128                 if (!vfd->vidioc_qbuf)
1129                         break;
1130                 ret = check_fmt (vfd, p->type);
1131                 if (ret)
1132                         break;
1133
1134                 ret=vfd->vidioc_qbuf(file, fh, p);
1135                 if (!ret)
1136                         dbgbuf(cmd,vfd,p);
1137                 break;
1138         }
1139         case VIDIOC_DQBUF:
1140         {
1141                 struct v4l2_buffer *p=arg;
1142                 if (!vfd->vidioc_dqbuf)
1143                         break;
1144                 ret = check_fmt (vfd, p->type);
1145                 if (ret)
1146                         break;
1147
1148                 ret=vfd->vidioc_dqbuf(file, fh, p);
1149                 if (!ret)
1150                         dbgbuf(cmd,vfd,p);
1151                 break;
1152         }
1153         case VIDIOC_OVERLAY:
1154         {
1155                 int *i = arg;
1156
1157                 if (!vfd->vidioc_overlay)
1158                         break;
1159                 dbgarg (cmd, "value=%d\n",*i);
1160                 ret=vfd->vidioc_overlay(file, fh, *i);
1161                 break;
1162         }
1163         case VIDIOC_G_FBUF:
1164         {
1165                 struct v4l2_framebuffer *p=arg;
1166                 if (!vfd->vidioc_g_fbuf)
1167                         break;
1168                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
1169                 if (!ret) {
1170                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
1171                                         p->capability,p->flags,
1172                                         (unsigned long)p->base);
1173                         v4l_print_pix_fmt (vfd, &p->fmt);
1174                 }
1175                 break;
1176         }
1177         case VIDIOC_S_FBUF:
1178         {
1179                 struct v4l2_framebuffer *p=arg;
1180                 if (!vfd->vidioc_s_fbuf)
1181                         break;
1182
1183                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
1184                                 p->capability,p->flags,(unsigned long)p->base);
1185                 v4l_print_pix_fmt (vfd, &p->fmt);
1186                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
1187
1188                 break;
1189         }
1190         case VIDIOC_STREAMON:
1191         {
1192                 enum v4l2_buf_type i = *(int *)arg;
1193                 if (!vfd->vidioc_streamon)
1194                         break;
1195                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1196                 ret=vfd->vidioc_streamon(file, fh,i);
1197                 break;
1198         }
1199         case VIDIOC_STREAMOFF:
1200         {
1201                 enum v4l2_buf_type i = *(int *)arg;
1202
1203                 if (!vfd->vidioc_streamoff)
1204                         break;
1205                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1206                 ret=vfd->vidioc_streamoff(file, fh, i);
1207                 break;
1208         }
1209         /* ---------- tv norms ---------- */
1210         case VIDIOC_ENUMSTD:
1211         {
1212                 struct v4l2_standard *p = arg;
1213                 v4l2_std_id id = vfd->tvnorms,curr_id=0;
1214                 unsigned int index = p->index,i;
1215
1216                 if (index<0) {
1217                         ret=-EINVAL;
1218                         break;
1219                 }
1220
1221                 /* Return norm array on a canonical way */
1222                 for (i=0;i<= index && id; i++) {
1223                         if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) {
1224                                 curr_id = V4L2_STD_PAL;
1225                         } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) {
1226                                 curr_id = V4L2_STD_PAL_BG;
1227                         } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) {
1228                                 curr_id = V4L2_STD_PAL_DK;
1229                         } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) {
1230                                 curr_id = V4L2_STD_PAL_B;
1231                         } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) {
1232                                 curr_id = V4L2_STD_PAL_B1;
1233                         } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) {
1234                                 curr_id = V4L2_STD_PAL_G;
1235                         } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) {
1236                                 curr_id = V4L2_STD_PAL_H;
1237                         } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) {
1238                                 curr_id = V4L2_STD_PAL_I;
1239                         } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) {
1240                                 curr_id = V4L2_STD_PAL_D;
1241                         } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) {
1242                                 curr_id = V4L2_STD_PAL_D1;
1243                         } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) {
1244                                 curr_id = V4L2_STD_PAL_K;
1245                         } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) {
1246                                 curr_id = V4L2_STD_PAL_M;
1247                         } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) {
1248                                 curr_id = V4L2_STD_PAL_N;
1249                         } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) {
1250                                 curr_id = V4L2_STD_PAL_Nc;
1251                         } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) {
1252                                 curr_id = V4L2_STD_PAL_60;
1253                         } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
1254                                 curr_id = V4L2_STD_NTSC;
1255                         } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) {
1256                                 curr_id = V4L2_STD_NTSC_M;
1257                         } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) {
1258                                 curr_id = V4L2_STD_NTSC_M_JP;
1259                         } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) {
1260                                 curr_id = V4L2_STD_NTSC_443;
1261                         } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) {
1262                                 curr_id = V4L2_STD_NTSC_M_KR;
1263                         } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
1264                                 curr_id = V4L2_STD_SECAM;
1265                         } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) {
1266                                 curr_id = V4L2_STD_SECAM_DK;
1267                         } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) {
1268                                 curr_id = V4L2_STD_SECAM_B;
1269                         } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) {
1270                                 curr_id = V4L2_STD_SECAM_D;
1271                         } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) {
1272                                 curr_id = V4L2_STD_SECAM_G;
1273                         } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) {
1274                                 curr_id = V4L2_STD_SECAM_H;
1275                         } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) {
1276                                 curr_id = V4L2_STD_SECAM_K;
1277                         } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) {
1278                                 curr_id = V4L2_STD_SECAM_K1;
1279                         } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) {
1280                                 curr_id = V4L2_STD_SECAM_L;
1281                         } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) {
1282                                 curr_id = V4L2_STD_SECAM_LC;
1283                         } else {
1284                                 break;
1285                         }
1286                         id &= ~curr_id;
1287                 }
1288                 if (i<=index)
1289                         return -EINVAL;
1290
1291                 v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id));
1292                 p->index = index;
1293
1294                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
1295                                 "framelines=%d\n", p->index,
1296                                 (unsigned long long)p->id, p->name,
1297                                 p->frameperiod.numerator,
1298                                 p->frameperiod.denominator,
1299                                 p->framelines);
1300
1301                 ret=0;
1302                 break;
1303         }
1304         case VIDIOC_G_STD:
1305         {
1306                 v4l2_std_id *id = arg;
1307
1308                 *id = vfd->current_norm;
1309
1310                 dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
1311
1312                 ret=0;
1313                 break;
1314         }
1315         case VIDIOC_S_STD:
1316         {
1317                 v4l2_std_id *id = arg,norm;
1318
1319                 dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
1320
1321                 norm = (*id) & vfd->tvnorms;
1322                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
1323                         break;
1324
1325                 /* Calls the specific handler */
1326                 if (vfd->vidioc_s_std)
1327                         ret=vfd->vidioc_s_std(file, fh, &norm);
1328                 else
1329                         ret=-EINVAL;
1330
1331                 /* Updates standard information */
1332                 if (ret>=0)
1333                         vfd->current_norm=norm;
1334
1335                 break;
1336         }
1337         case VIDIOC_QUERYSTD:
1338         {
1339                 v4l2_std_id *p=arg;
1340
1341                 if (!vfd->vidioc_querystd)
1342                         break;
1343                 ret=vfd->vidioc_querystd(file, fh, arg);
1344                 if (!ret)
1345                         dbgarg (cmd, "detected std=%08Lx\n",
1346                                                 (unsigned long long)*p);
1347                 break;
1348         }
1349         /* ------ input switching ---------- */
1350         /* FIXME: Inputs can be handled inside videodev2 */
1351         case VIDIOC_ENUMINPUT:
1352         {
1353                 struct v4l2_input *p=arg;
1354                 int i=p->index;
1355
1356                 if (!vfd->vidioc_enum_input)
1357                         break;
1358                 memset(p, 0, sizeof(*p));
1359                 p->index=i;
1360
1361                 ret=vfd->vidioc_enum_input(file, fh, p);
1362                 if (!ret)
1363                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1364                                         "audioset=%d, "
1365                                         "tuner=%d, std=%08Lx, status=%d\n",
1366                                         p->index,p->name,p->type,p->audioset,
1367                                         p->tuner,
1368                                         (unsigned long long)p->std,
1369                                         p->status);
1370                 break;
1371         }
1372         case VIDIOC_G_INPUT:
1373         {
1374                 unsigned int *i = arg;
1375
1376                 if (!vfd->vidioc_g_input)
1377                         break;
1378                 ret=vfd->vidioc_g_input(file, fh, i);
1379                 if (!ret)
1380                         dbgarg (cmd, "value=%d\n",*i);
1381                 break;
1382         }
1383         case VIDIOC_S_INPUT:
1384         {
1385                 unsigned int *i = arg;
1386
1387                 if (!vfd->vidioc_s_input)
1388                         break;
1389                 dbgarg (cmd, "value=%d\n",*i);
1390                 ret=vfd->vidioc_s_input(file, fh, *i);
1391                 break;
1392         }
1393
1394         /* ------ output switching ---------- */
1395         case VIDIOC_G_OUTPUT:
1396         {
1397                 unsigned int *i = arg;
1398
1399                 if (!vfd->vidioc_g_output)
1400                         break;
1401                 ret=vfd->vidioc_g_output(file, fh, i);
1402                 if (!ret)
1403                         dbgarg (cmd, "value=%d\n",*i);
1404                 break;
1405         }
1406         case VIDIOC_S_OUTPUT:
1407         {
1408                 unsigned int *i = arg;
1409
1410                 if (!vfd->vidioc_s_output)
1411                         break;
1412                 dbgarg (cmd, "value=%d\n",*i);
1413                 ret=vfd->vidioc_s_output(file, fh, *i);
1414                 break;
1415         }
1416
1417         /* --- controls ---------------------------------------------- */
1418         case VIDIOC_QUERYCTRL:
1419         {
1420                 struct v4l2_queryctrl *p=arg;
1421
1422                 if (!vfd->vidioc_queryctrl)
1423                         break;
1424                 ret=vfd->vidioc_queryctrl(file, fh, p);
1425
1426                 if (!ret)
1427                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1428                                         "min/max=%d/%d,"
1429                                         " step=%d, default=%d, flags=0x%08x\n",
1430                                         p->id,p->type,p->name,p->minimum,
1431                                         p->maximum,p->step,p->default_value,
1432                                         p->flags);
1433                 break;
1434         }
1435         case VIDIOC_G_CTRL:
1436         {
1437                 struct v4l2_control *p = arg;
1438
1439                 if (!vfd->vidioc_g_ctrl)
1440                         break;
1441                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1442
1443                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1444                 if (!ret)
1445                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1446                 break;
1447         }
1448         case VIDIOC_S_CTRL:
1449         {
1450                 struct v4l2_control *p = arg;
1451
1452                 if (!vfd->vidioc_s_ctrl)
1453                         break;
1454                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1455
1456                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1457                 break;
1458         }
1459         case VIDIOC_G_EXT_CTRLS:
1460         {
1461                 struct v4l2_ext_controls *p = arg;
1462
1463                 if (vfd->vidioc_g_ext_ctrls) {
1464                         dbgarg(cmd, "count=%d\n", p->count);
1465
1466                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1467                 }
1468                 break;
1469         }
1470         case VIDIOC_S_EXT_CTRLS:
1471         {
1472                 struct v4l2_ext_controls *p = arg;
1473
1474                 if (vfd->vidioc_s_ext_ctrls) {
1475                         dbgarg(cmd, "count=%d\n", p->count);
1476
1477                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1478                 }
1479                 break;
1480         }
1481         case VIDIOC_TRY_EXT_CTRLS:
1482         {
1483                 struct v4l2_ext_controls *p = arg;
1484
1485                 if (vfd->vidioc_try_ext_ctrls) {
1486                         dbgarg(cmd, "count=%d\n", p->count);
1487
1488                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1489                 }
1490                 break;
1491         }
1492         case VIDIOC_QUERYMENU:
1493         {
1494                 struct v4l2_querymenu *p=arg;
1495                 if (!vfd->vidioc_querymenu)
1496                         break;
1497                 ret=vfd->vidioc_querymenu(file, fh, p);
1498                 if (!ret)
1499                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1500                                                 p->id,p->index,p->name);
1501                 break;
1502         }
1503         /* --- audio ---------------------------------------------- */
1504         case VIDIOC_ENUMAUDIO:
1505         {
1506                 struct v4l2_audio *p=arg;
1507
1508                 if (!vfd->vidioc_enumaudio)
1509                         break;
1510                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1511                 ret=vfd->vidioc_enumaudio(file, fh, p);
1512                 if (!ret)
1513                         dbgarg2("index=%d, name=%s, capability=%d, "
1514                                         "mode=%d\n",p->index,p->name,
1515                                         p->capability, p->mode);
1516                 break;
1517         }
1518         case VIDIOC_G_AUDIO:
1519         {
1520                 struct v4l2_audio *p=arg;
1521                 __u32 index=p->index;
1522
1523                 if (!vfd->vidioc_g_audio)
1524                         break;
1525
1526                 memset(p,0,sizeof(*p));
1527                 p->index=index;
1528                 dbgarg(cmd, "Get for index=%d\n", p->index);
1529                 ret=vfd->vidioc_g_audio(file, fh, p);
1530                 if (!ret)
1531                         dbgarg2("index=%d, name=%s, capability=%d, "
1532                                         "mode=%d\n",p->index,
1533                                         p->name,p->capability, p->mode);
1534                 break;
1535         }
1536         case VIDIOC_S_AUDIO:
1537         {
1538                 struct v4l2_audio *p=arg;
1539
1540                 if (!vfd->vidioc_s_audio)
1541                         break;
1542                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1543                                         "mode=%d\n", p->index, p->name,
1544                                         p->capability, p->mode);
1545                 ret=vfd->vidioc_s_audio(file, fh, p);
1546                 break;
1547         }
1548         case VIDIOC_ENUMAUDOUT:
1549         {
1550                 struct v4l2_audioout *p=arg;
1551
1552                 if (!vfd->vidioc_enumaudout)
1553                         break;
1554                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1555                 ret=vfd->vidioc_enumaudout(file, fh, p);
1556                 if (!ret)
1557                         dbgarg2("index=%d, name=%s, capability=%d, "
1558                                         "mode=%d\n", p->index, p->name,
1559                                         p->capability,p->mode);
1560                 break;
1561         }
1562         case VIDIOC_G_AUDOUT:
1563         {
1564                 struct v4l2_audioout *p=arg;
1565
1566                 if (!vfd->vidioc_g_audout)
1567                         break;
1568                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1569                 ret=vfd->vidioc_g_audout(file, fh, p);
1570                 if (!ret)
1571                         dbgarg2("index=%d, name=%s, capability=%d, "
1572                                         "mode=%d\n", p->index, p->name,
1573                                         p->capability,p->mode);
1574                 break;
1575         }
1576         case VIDIOC_S_AUDOUT:
1577         {
1578                 struct v4l2_audioout *p=arg;
1579
1580                 if (!vfd->vidioc_s_audout)
1581                         break;
1582                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1583                                         "mode=%d\n", p->index, p->name,
1584                                         p->capability,p->mode);
1585
1586                 ret=vfd->vidioc_s_audout(file, fh, p);
1587                 break;
1588         }
1589         case VIDIOC_G_MODULATOR:
1590         {
1591                 struct v4l2_modulator *p=arg;
1592                 if (!vfd->vidioc_g_modulator)
1593                         break;
1594                 ret=vfd->vidioc_g_modulator(file, fh, p);
1595                 if (!ret)
1596                         dbgarg(cmd, "index=%d, name=%s, "
1597                                         "capability=%d, rangelow=%d,"
1598                                         " rangehigh=%d, txsubchans=%d\n",
1599                                         p->index, p->name,p->capability,
1600                                         p->rangelow, p->rangehigh,
1601                                         p->txsubchans);
1602                 break;
1603         }
1604         case VIDIOC_S_MODULATOR:
1605         {
1606                 struct v4l2_modulator *p=arg;
1607                 if (!vfd->vidioc_s_modulator)
1608                         break;
1609                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1610                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1611                                 p->index, p->name,p->capability,p->rangelow,
1612                                 p->rangehigh,p->txsubchans);
1613                         ret=vfd->vidioc_s_modulator(file, fh, p);
1614                 break;
1615         }
1616         case VIDIOC_G_CROP:
1617         {
1618                 struct v4l2_crop *p=arg;
1619                 if (!vfd->vidioc_g_crop)
1620                         break;
1621                 ret=vfd->vidioc_g_crop(file, fh, p);
1622                 if (!ret) {
1623                         dbgarg(cmd, "type=%d\n", p->type);
1624                         dbgrect(vfd, "", &p->c);
1625                 }
1626                 break;
1627         }
1628         case VIDIOC_S_CROP:
1629         {
1630                 struct v4l2_crop *p=arg;
1631                 if (!vfd->vidioc_s_crop)
1632                         break;
1633                 dbgarg(cmd, "type=%d\n", p->type);
1634                 dbgrect(vfd, "", &p->c);
1635                 ret=vfd->vidioc_s_crop(file, fh, p);
1636                 break;
1637         }
1638         case VIDIOC_CROPCAP:
1639         {
1640                 struct v4l2_cropcap *p=arg;
1641                 /*FIXME: Should also show v4l2_fract pixelaspect */
1642                 if (!vfd->vidioc_cropcap)
1643                         break;
1644                 dbgarg(cmd, "type=%d\n", p->type);
1645                 dbgrect(vfd, "bounds ", &p->bounds);
1646                 dbgrect(vfd, "defrect ", &p->defrect);
1647                 ret=vfd->vidioc_cropcap(file, fh, p);
1648                 break;
1649         }
1650         case VIDIOC_G_JPEGCOMP:
1651         {
1652                 struct v4l2_jpegcompression *p=arg;
1653                 if (!vfd->vidioc_g_jpegcomp)
1654                         break;
1655                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1656                 if (!ret)
1657                         dbgarg (cmd, "quality=%d, APPn=%d, "
1658                                                 "APP_len=%d, COM_len=%d, "
1659                                                 "jpeg_markers=%d\n",
1660                                                 p->quality,p->APPn,p->APP_len,
1661                                                 p->COM_len,p->jpeg_markers);
1662                 break;
1663         }
1664         case VIDIOC_S_JPEGCOMP:
1665         {
1666                 struct v4l2_jpegcompression *p=arg;
1667                 if (!vfd->vidioc_g_jpegcomp)
1668                         break;
1669                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1670                                         "COM_len=%d, jpeg_markers=%d\n",
1671                                         p->quality,p->APPn,p->APP_len,
1672                                         p->COM_len,p->jpeg_markers);
1673                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1674                 break;
1675         }
1676         case VIDIOC_G_ENC_INDEX:
1677         {
1678                 struct v4l2_enc_idx *p=arg;
1679
1680                 if (!vfd->vidioc_g_enc_index)
1681                         break;
1682                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1683                 if (!ret)
1684                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1685                                         p->entries,p->entries_cap);
1686                 break;
1687         }
1688         case VIDIOC_ENCODER_CMD:
1689         {
1690                 struct v4l2_encoder_cmd *p=arg;
1691
1692                 if (!vfd->vidioc_encoder_cmd)
1693                         break;
1694                 ret=vfd->vidioc_encoder_cmd(file, fh, p);
1695                 if (!ret)
1696                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1697                                         p->cmd,p->flags);
1698                 break;
1699         }
1700         case VIDIOC_TRY_ENCODER_CMD:
1701         {
1702                 struct v4l2_encoder_cmd *p=arg;
1703
1704                 if (!vfd->vidioc_try_encoder_cmd)
1705                         break;
1706                 ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
1707                 if (!ret)
1708                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1709                                         p->cmd,p->flags);
1710                 break;
1711         }
1712         case VIDIOC_G_PARM:
1713         {
1714                 struct v4l2_streamparm *p=arg;
1715                 __u32 type=p->type;
1716
1717                 memset(p,0,sizeof(*p));
1718                 p->type=type;
1719
1720                 if (vfd->vidioc_g_parm) {
1721                         ret=vfd->vidioc_g_parm(file, fh, p);
1722                 } else {
1723                         struct v4l2_standard s;
1724
1725                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1726                                 return -EINVAL;
1727
1728                         v4l2_video_std_construct(&s, vfd->current_norm,
1729                                                  v4l2_norm_to_name(vfd->current_norm));
1730
1731                         p->parm.capture.timeperframe = s.frameperiod;
1732                         ret=0;
1733                 }
1734
1735                 dbgarg (cmd, "type=%d\n", p->type);
1736                 break;
1737         }
1738         case VIDIOC_S_PARM:
1739         {
1740                 struct v4l2_streamparm *p=arg;
1741                 if (!vfd->vidioc_s_parm)
1742                         break;
1743                 dbgarg (cmd, "type=%d\n", p->type);
1744                 ret=vfd->vidioc_s_parm(file, fh, p);
1745                 break;
1746         }
1747         case VIDIOC_G_TUNER:
1748         {
1749                 struct v4l2_tuner *p=arg;
1750                 __u32 index=p->index;
1751
1752                 if (!vfd->vidioc_g_tuner)
1753                         break;
1754
1755                 memset(p,0,sizeof(*p));
1756                 p->index=index;
1757
1758                 ret=vfd->vidioc_g_tuner(file, fh, p);
1759                 if (!ret)
1760                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1761                                         "capability=%d, rangelow=%d, "
1762                                         "rangehigh=%d, signal=%d, afc=%d, "
1763                                         "rxsubchans=%d, audmode=%d\n",
1764                                         p->index, p->name, p->type,
1765                                         p->capability, p->rangelow,
1766                                         p->rangehigh, p->rxsubchans,
1767                                         p->audmode, p->signal, p->afc);
1768                 break;
1769         }
1770         case VIDIOC_S_TUNER:
1771         {
1772                 struct v4l2_tuner *p=arg;
1773                 if (!vfd->vidioc_s_tuner)
1774                         break;
1775                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1776                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1777                                 "signal=%d, afc=%d, rxsubchans=%d, "
1778                                 "audmode=%d\n",p->index, p->name, p->type,
1779                                 p->capability, p->rangelow,p->rangehigh,
1780                                 p->rxsubchans, p->audmode, p->signal,
1781                                 p->afc);
1782                 ret=vfd->vidioc_s_tuner(file, fh, p);
1783                 break;
1784         }
1785         case VIDIOC_G_FREQUENCY:
1786         {
1787                 struct v4l2_frequency *p=arg;
1788                 if (!vfd->vidioc_g_frequency)
1789                         break;
1790
1791                 memset(p,0,sizeof(*p));
1792
1793                 ret=vfd->vidioc_g_frequency(file, fh, p);
1794                 if (!ret)
1795                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1796                                                 p->tuner,p->type,p->frequency);
1797                 break;
1798         }
1799         case VIDIOC_S_FREQUENCY:
1800         {
1801                 struct v4l2_frequency *p=arg;
1802                 if (!vfd->vidioc_s_frequency)
1803                         break;
1804                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1805                                 p->tuner,p->type,p->frequency);
1806                 ret=vfd->vidioc_s_frequency(file, fh, p);
1807                 break;
1808         }
1809         case VIDIOC_G_SLICED_VBI_CAP:
1810         {
1811                 struct v4l2_sliced_vbi_cap *p=arg;
1812                 if (!vfd->vidioc_g_sliced_vbi_cap)
1813                         break;
1814                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1815                 if (!ret)
1816                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1817                 break;
1818         }
1819         case VIDIOC_LOG_STATUS:
1820         {
1821                 if (!vfd->vidioc_log_status)
1822                         break;
1823                 ret=vfd->vidioc_log_status(file, fh);
1824                 break;
1825         }
1826 #ifdef CONFIG_VIDEO_ADV_DEBUG
1827         case VIDIOC_DBG_G_REGISTER:
1828         {
1829                 struct v4l2_register *p=arg;
1830                 if (!capable(CAP_SYS_ADMIN))
1831                         ret=-EPERM;
1832                 else if (vfd->vidioc_g_register)
1833                         ret=vfd->vidioc_g_register(file, fh, p);
1834                 break;
1835         }
1836         case VIDIOC_DBG_S_REGISTER:
1837         {
1838                 struct v4l2_register *p=arg;
1839                 if (!capable(CAP_SYS_ADMIN))
1840                         ret=-EPERM;
1841                 else if (vfd->vidioc_s_register)
1842                         ret=vfd->vidioc_s_register(file, fh, p);
1843                 break;
1844         }
1845 #endif
1846         case VIDIOC_G_CHIP_IDENT:
1847         {
1848                 struct v4l2_chip_ident *p=arg;
1849                 if (!vfd->vidioc_g_chip_ident)
1850                         break;
1851                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1852                 if (!ret)
1853                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1854                 break;
1855         }
1856         } /* switch */
1857
1858         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1859                 if (ret<0) {
1860                         printk ("%s: err:\n", vfd->name);
1861                         v4l_print_ioctl(vfd->name, cmd);
1862                 }
1863         }
1864
1865         return ret;
1866 }
1867
1868 int video_ioctl2 (struct inode *inode, struct file *file,
1869                unsigned int cmd, unsigned long arg)
1870 {
1871         char    sbuf[128];
1872         void    *mbuf = NULL;
1873         void    *parg = NULL;
1874         int     err  = -EINVAL;
1875         int     is_ext_ctrl;
1876         size_t  ctrls_size = 0;
1877         void __user *user_ptr = NULL;
1878
1879 #ifdef __OLD_VIDIOC_
1880         cmd = video_fix_command(cmd);
1881 #endif
1882         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1883                        cmd == VIDIOC_TRY_EXT_CTRLS);
1884
1885         /*  Copy arguments into temp kernel buffer  */
1886         switch (_IOC_DIR(cmd)) {
1887         case _IOC_NONE:
1888                 parg = NULL;
1889                 break;
1890         case _IOC_READ:
1891         case _IOC_WRITE:
1892         case (_IOC_WRITE | _IOC_READ):
1893                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1894                         parg = sbuf;
1895                 } else {
1896                         /* too big to allocate from stack */
1897                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1898                         if (NULL == mbuf)
1899                                 return -ENOMEM;
1900                         parg = mbuf;
1901                 }
1902
1903                 err = -EFAULT;
1904                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1905                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1906                                 goto out;
1907                 break;
1908         }
1909
1910         if (is_ext_ctrl) {
1911                 struct v4l2_ext_controls *p = parg;
1912
1913                 /* In case of an error, tell the caller that it wasn't
1914                    a specific control that caused it. */
1915                 p->error_idx = p->count;
1916                 user_ptr = (void __user *)p->controls;
1917                 if (p->count) {
1918                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1919                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1920                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1921                         err = -ENOMEM;
1922                         if (NULL == mbuf)
1923                                 goto out_ext_ctrl;
1924                         err = -EFAULT;
1925                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1926                                 goto out_ext_ctrl;
1927                         p->controls = mbuf;
1928                 }
1929         }
1930
1931         /* Handles IOCTL */
1932         err = __video_do_ioctl(inode, file, cmd, parg);
1933         if (err == -ENOIOCTLCMD)
1934                 err = -EINVAL;
1935         if (is_ext_ctrl) {
1936                 struct v4l2_ext_controls *p = parg;
1937
1938                 p->controls = (void *)user_ptr;
1939                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1940                         err = -EFAULT;
1941                 goto out_ext_ctrl;
1942         }
1943         if (err < 0)
1944                 goto out;
1945
1946 out_ext_ctrl:
1947         /*  Copy results into user buffer  */
1948         switch (_IOC_DIR(cmd))
1949         {
1950         case _IOC_READ:
1951         case (_IOC_WRITE | _IOC_READ):
1952                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1953                         err = -EFAULT;
1954                 break;
1955         }
1956
1957 out:
1958         kfree(mbuf);
1959         return err;
1960 }
1961 EXPORT_SYMBOL(video_ioctl2);
1962
1963 static const struct file_operations video_fops;
1964
1965 /**
1966  *      video_register_device - register video4linux devices
1967  *      @vfd:  video device structure we want to register
1968  *      @type: type of device to register
1969  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1970  *             -1 == first free)
1971  *
1972  *      The registration code assigns minor numbers based on the type
1973  *      requested. -ENFILE is returned in all the device slots for this
1974  *      category are full. If not then the minor field is set and the
1975  *      driver initialize function is called (if non %NULL).
1976  *
1977  *      Zero is returned on success.
1978  *
1979  *      Valid types are
1980  *
1981  *      %VFL_TYPE_GRABBER - A frame grabber
1982  *
1983  *      %VFL_TYPE_VTX - A teletext device
1984  *
1985  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1986  *
1987  *      %VFL_TYPE_RADIO - A radio card
1988  */
1989
1990 int video_register_device(struct video_device *vfd, int type, int nr)
1991 {
1992         int i=0;
1993         int base;
1994         int end;
1995         int ret;
1996         char *name_base;
1997
1998         switch(type)
1999         {
2000                 case VFL_TYPE_GRABBER:
2001                         base=MINOR_VFL_TYPE_GRABBER_MIN;
2002                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
2003                         name_base = "video";
2004                         break;
2005                 case VFL_TYPE_VTX:
2006                         base=MINOR_VFL_TYPE_VTX_MIN;
2007                         end=MINOR_VFL_TYPE_VTX_MAX+1;
2008                         name_base = "vtx";
2009                         break;
2010                 case VFL_TYPE_VBI:
2011                         base=MINOR_VFL_TYPE_VBI_MIN;
2012                         end=MINOR_VFL_TYPE_VBI_MAX+1;
2013                         name_base = "vbi";
2014                         break;
2015                 case VFL_TYPE_RADIO:
2016                         base=MINOR_VFL_TYPE_RADIO_MIN;
2017                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
2018                         name_base = "radio";
2019                         break;
2020                 default:
2021                         printk(KERN_ERR "%s called with unknown type: %d\n",
2022                                __FUNCTION__, type);
2023                         return -1;
2024         }
2025
2026         /* pick a minor number */
2027         mutex_lock(&videodev_lock);
2028         if (nr >= 0  &&  nr < end-base) {
2029                 /* use the one the driver asked for */
2030                 i = base+nr;
2031                 if (NULL != video_device[i]) {
2032                         mutex_unlock(&videodev_lock);
2033                         return -ENFILE;
2034                 }
2035         } else {
2036                 /* use first free */
2037                 for(i=base;i<end;i++)
2038                         if (NULL == video_device[i])
2039                                 break;
2040                 if (i == end) {
2041                         mutex_unlock(&videodev_lock);
2042                         return -ENFILE;
2043                 }
2044         }
2045         video_device[i]=vfd;
2046         vfd->minor=i;
2047         mutex_unlock(&videodev_lock);
2048         mutex_init(&vfd->lock);
2049
2050         /* sysfs class */
2051         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
2052         if (vfd->dev)
2053                 vfd->class_dev.parent = vfd->dev;
2054         vfd->class_dev.class       = &video_class;
2055         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
2056         sprintf(vfd->class_dev.bus_id, "%s%d", name_base, i - base);
2057         ret = device_register(&vfd->class_dev);
2058         if (ret < 0) {
2059                 printk(KERN_ERR "%s: device_register failed\n",
2060                        __FUNCTION__);
2061                 goto fail_minor;
2062         }
2063
2064 #if 1
2065         /* needed until all drivers are fixed */
2066         if (!vfd->release)
2067                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
2068                        "Please fix your driver for proper sysfs support, see "
2069                        "http://lwn.net/Articles/36850/\n", vfd->name);
2070 #endif
2071         return 0;
2072
2073 fail_minor:
2074         mutex_lock(&videodev_lock);
2075         video_device[vfd->minor] = NULL;
2076         vfd->minor = -1;
2077         mutex_unlock(&videodev_lock);
2078         return ret;
2079 }
2080 EXPORT_SYMBOL(video_register_device);
2081
2082 /**
2083  *      video_unregister_device - unregister a video4linux device
2084  *      @vfd: the device to unregister
2085  *
2086  *      This unregisters the passed device and deassigns the minor
2087  *      number. Future open calls will be met with errors.
2088  */
2089
2090 void video_unregister_device(struct video_device *vfd)
2091 {
2092         mutex_lock(&videodev_lock);
2093         if(video_device[vfd->minor]!=vfd)
2094                 panic("videodev: bad unregister");
2095
2096         video_device[vfd->minor]=NULL;
2097         device_unregister(&vfd->class_dev);
2098         mutex_unlock(&videodev_lock);
2099 }
2100 EXPORT_SYMBOL(video_unregister_device);
2101
2102 /*
2103  * Video fs operations
2104  */
2105 static const struct file_operations video_fops=
2106 {
2107         .owner          = THIS_MODULE,
2108         .llseek         = no_llseek,
2109         .open           = video_open,
2110 };
2111
2112 /*
2113  *      Initialise video for linux
2114  */
2115
2116 static int __init videodev_init(void)
2117 {
2118         int ret;
2119
2120         printk(KERN_INFO "Linux video capture interface: v2.00\n");
2121         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
2122                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
2123                 return -EIO;
2124         }
2125
2126         ret = class_register(&video_class);
2127         if (ret < 0) {
2128                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2129                 printk(KERN_WARNING "video_dev: class_register failed\n");
2130                 return -EIO;
2131         }
2132
2133         return 0;
2134 }
2135
2136 static void __exit videodev_exit(void)
2137 {
2138         class_unregister(&video_class);
2139         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2140 }
2141
2142 module_init(videodev_init)
2143 module_exit(videodev_exit)
2144
2145 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
2146 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
2147 MODULE_LICENSE("GPL");
2148
2149
2150 /*
2151  * Local variables:
2152  * c-basic-offset: 8
2153  * End:
2154  */