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(" " fmt,  ## 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 <linux/smp_lock.h>
  40 #include <asm/uaccess.h>
  41 #include <asm/system.h>
  42
  43 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
  44 #include <linux/videodev2.h>
  45
  46 #ifdef CONFIG_VIDEO_V4L1
  47 #include <linux/videodev.h>
  48 #endif
  49 #include <media/v4l2-common.h>
  50 #include <linux/video_decoder.h>
  51
  52 #define VIDEO_NUM_DEVICES       256
  53 #define VIDEO_NAME              "video4linux"
  54
  55 struct std_descr {
  56         v4l2_std_id std;
  57         const char *descr;
  58 };
  59
  60 static const struct std_descr standards[] = {
  61         { V4L2_STD_NTSC,        "NTSC"      },
  62         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  63         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  64         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  65         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  66         { V4L2_STD_PAL,         "PAL"       },
  67         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  68         { V4L2_STD_PAL_B,       "PAL-B"     },
  69         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  70         { V4L2_STD_PAL_G,       "PAL-G"     },
  71         { V4L2_STD_PAL_H,       "PAL-H"     },
  72         { V4L2_STD_PAL_I,       "PAL-I"     },
  73         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  74         { V4L2_STD_PAL_D,       "PAL-D"     },
  75         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  76         { V4L2_STD_PAL_K,       "PAL-K"     },
  77         { V4L2_STD_PAL_M,       "PAL-M"     },
  78         { V4L2_STD_PAL_N,       "PAL-N"     },
  79         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  80         { V4L2_STD_PAL_60,      "PAL-60"    },
  81         { V4L2_STD_SECAM,       "SECAM"     },
  82         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  83         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  84         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  85         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  86         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  87         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  88         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  89         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  90         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  91         { 0,                    "Unknown"   }
  92 };
  93
  94 /* video4linux standard ID conversion to standard name
  95  */
  96 const char *v4l2_norm_to_name(v4l2_std_id id)
  97 {
  98         u32 myid = id;
  99         int i;
 100
 101         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
 102            64 bit comparations. So, on that architecture, with some gcc
 103            variants, compilation fails. Currently, the max value is 30bit wide.
 104          */
 105         BUG_ON(myid != id);
 106
 107         for (i = 0; standards[i].std; i++)
 108                 if (myid == standards[i].std)
 109                         break;
 110         return standards[i].descr;
 111 }
 112 EXPORT_SYMBOL(v4l2_norm_to_name);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         u32 index = vs->index;
 120
 121         memset(vs, 0, sizeof(struct v4l2_standard));
 122         vs->index = index;
 123         vs->id    = id;
 124         if (id & V4L2_STD_525_60) {
 125                 vs->frameperiod.numerator = 1001;
 126                 vs->frameperiod.denominator = 30000;
 127                 vs->framelines = 525;
 128         } else {
 129                 vs->frameperiod.numerator = 1;
 130                 vs->frameperiod.denominator = 25;
 131                 vs->framelines = 625;
 132         }
 133         strlcpy(vs->name, name, sizeof(vs->name));
 134         return 0;
 135 }
 136 EXPORT_SYMBOL(v4l2_video_std_construct);
 137
 138 /* ----------------------------------------------------------------- */
 139 /* some arrays for pretty-printing debug messages of enum types      */
 140
 141 char *v4l2_field_names[] = {
 142         [V4L2_FIELD_ANY]        = "any",
 143         [V4L2_FIELD_NONE]       = "none",
 144         [V4L2_FIELD_TOP]        = "top",
 145         [V4L2_FIELD_BOTTOM]     = "bottom",
 146         [V4L2_FIELD_INTERLACED] = "interlaced",
 147         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 148         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 149         [V4L2_FIELD_ALTERNATE]  = "alternate",
 150         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 151         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 152 };
 153 EXPORT_SYMBOL(v4l2_field_names);
 154
 155 char *v4l2_type_names[] = {
 156         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
 157         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
 158         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
 159         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 160         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 161         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 162         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 163         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
 164 };
 165 EXPORT_SYMBOL(v4l2_type_names);
 166
 167 static char *v4l2_memory_names[] = {
 168         [V4L2_MEMORY_MMAP]    = "mmap",
 169         [V4L2_MEMORY_USERPTR] = "userptr",
 170         [V4L2_MEMORY_OVERLAY] = "overlay",
 171 };
 172
 173 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 174                            arr[a] : "unknown")
 175
 176 /* ------------------------------------------------------------------ */
 177 /* debug help functions                                               */
 178
 179 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 180 static const char *v4l1_ioctls[] = {
 181         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
 182         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
 183         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
 184         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
 185         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
 186         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
 187         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
 188         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
 189         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
 190         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
 191         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
 192         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
 193         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
 194         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
 195         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
 196         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
 197         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
 198         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
 199         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
 200         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
 201         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
 202         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
 203         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
 204         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
 205         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
 206         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
 207         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
 208         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
 209         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
 210 };
 211 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
 212 #endif
 213
 214 static const char *v4l2_ioctls[] = {
 215         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 216         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 217         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 218         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 219         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 220         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 221         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 222         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 223         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 224         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 225         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 226         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 227         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 228         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 229         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 230         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 231         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 232         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 233         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 234         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 235         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 236         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 237         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 238         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 239         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 240         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 241         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 242         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 243         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 244         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 245         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 246         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 247         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 248         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 249         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 250         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 251         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 252         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 253         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 254         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 255         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 256         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 257         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 258         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 259         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 260         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 261         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 262         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 263         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 264         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 265         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 266         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 267         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 268         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 269         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 270 #if 1
 271         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 272         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 273         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 274         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 275         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 276
 277         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 278         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 279
 280         [_IOC_NR(VIDIOC_G_CHIP_IDENT)]     = "VIDIOC_G_CHIP_IDENT",
 281         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 282 #endif
 283 };
 284 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 285
 286 static const char *v4l2_int_ioctls[] = {
 287 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 288         [_IOC_NR(DECODER_GET_CAPABILITIES)]    = "DECODER_GET_CAPABILITIES",
 289         [_IOC_NR(DECODER_GET_STATUS)]          = "DECODER_GET_STATUS",
 290         [_IOC_NR(DECODER_SET_NORM)]            = "DECODER_SET_NORM",
 291         [_IOC_NR(DECODER_SET_INPUT)]           = "DECODER_SET_INPUT",
 292         [_IOC_NR(DECODER_SET_OUTPUT)]          = "DECODER_SET_OUTPUT",
 293         [_IOC_NR(DECODER_ENABLE_OUTPUT)]       = "DECODER_ENABLE_OUTPUT",
 294         [_IOC_NR(DECODER_SET_PICTURE)]         = "DECODER_SET_PICTURE",
 295         [_IOC_NR(DECODER_SET_GPIO)]            = "DECODER_SET_GPIO",
 296         [_IOC_NR(DECODER_INIT)]                = "DECODER_INIT",
 297         [_IOC_NR(DECODER_SET_VBI_BYPASS)]      = "DECODER_SET_VBI_BYPASS",
 298         [_IOC_NR(DECODER_DUMP)]                = "DECODER_DUMP",
 299 #endif
 300         [_IOC_NR(AUDC_SET_RADIO)]              = "AUDC_SET_RADIO",
 301
 302         [_IOC_NR(TUNER_SET_TYPE_ADDR)]         = "TUNER_SET_TYPE_ADDR",
 303         [_IOC_NR(TUNER_SET_STANDBY)]           = "TUNER_SET_STANDBY",
 304         [_IOC_NR(TUNER_SET_CONFIG)]            = "TUNER_SET_CONFIG",
 305
 306         [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)]     = "VIDIOC_INT_S_TUNER_MODE",
 307         [_IOC_NR(VIDIOC_INT_RESET)]            = "VIDIOC_INT_RESET",
 308         [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
 309         [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)]  = "VIDIOC_INT_DECODE_VBI_LINE",
 310         [_IOC_NR(VIDIOC_INT_S_VBI_DATA)]       = "VIDIOC_INT_S_VBI_DATA",
 311         [_IOC_NR(VIDIOC_INT_G_VBI_DATA)]       = "VIDIOC_INT_G_VBI_DATA",
 312         [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)]   = "VIDIOC_INT_I2S_CLOCK_FREQ",
 313         [_IOC_NR(VIDIOC_INT_S_STANDBY)]        = "VIDIOC_INT_S_STANDBY",
 314         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
 315         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
 316         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
 317         [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
 318         [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ",
 319         [_IOC_NR(VIDIOC_INT_INIT)]             = "VIDIOC_INT_INIT",
 320         [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)]     = "VIDIOC_INT_G_STD_OUTPUT",
 321         [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)]     = "VIDIOC_INT_S_STD_OUTPUT",
 322 };
 323 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 324
 325 /* Common ioctl debug function. This function can be used by
 326    external ioctl messages as well as internal V4L ioctl */
 327 void v4l_printk_ioctl(unsigned int cmd)
 328 {
 329         char *dir, *type;
 330
 331         switch (_IOC_TYPE(cmd)) {
 332         case 'd':
 333                 if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
 334                         type = "v4l2_int";
 335                         break;
 336                 }
 337                 printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
 338                 return;
 339 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 340         case 'v':
 341                 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
 342                         type = "v4l1";
 343                         break;
 344                 }
 345                 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
 346                 return;
 347 #endif
 348         case 'V':
 349                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
 350                         type = "v4l2";
 351                         break;
 352                 }
 353                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
 354                 return;
 355         default:
 356                 type = "unknown";
 357         }
 358
 359         switch (_IOC_DIR(cmd)) {
 360         case _IOC_NONE:              dir = "--"; break;
 361         case _IOC_READ:              dir = "r-"; break;
 362         case _IOC_WRITE:             dir = "-w"; break;
 363         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 364         default:                     dir = "*ERR*"; break;
 365         }
 366         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
 367                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 368 }
 369 EXPORT_SYMBOL(v4l_printk_ioctl);
 370
 371 /*
 372  *      sysfs stuff
 373  */
 374
 375 static ssize_t show_name(struct device *cd,
 376                          struct device_attribute *attr, char *buf)
 377 {
 378         struct video_device *vfd = container_of(cd, struct video_device,
 379                                                 class_dev);
 380         return sprintf(buf, "%.*s\n", (int)sizeof(vfd->name), vfd->name);
 381 }
 382
 383 struct video_device *video_device_alloc(void)
 384 {
 385         struct video_device *vfd;
 386
 387         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
 388         return vfd;
 389 }
 390 EXPORT_SYMBOL(video_device_alloc);
 391
 392 void video_device_release(struct video_device *vfd)
 393 {
 394         kfree(vfd);
 395 }
 396 EXPORT_SYMBOL(video_device_release);
 397
 398 static void video_release(struct device *cd)
 399 {
 400         struct video_device *vfd = container_of(cd, struct video_device,
 401                                                                 class_dev);
 402
 403 #if 1
 404         /* needed until all drivers are fixed */
 405         if (!vfd->release)
 406                 return;
 407 #endif
 408         vfd->release(vfd);
 409 }
 410
 411 static struct device_attribute video_device_attrs[] = {
 412         __ATTR(name, S_IRUGO, show_name, NULL),
 413         __ATTR_NULL
 414 };
 415
 416 static struct class video_class = {
 417         .name    = VIDEO_NAME,
 418         .dev_attrs = video_device_attrs,
 419         .dev_release = video_release,
 420 };
 421
 422 /*
 423  *      Active devices
 424  */
 425
 426 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 427 static DEFINE_MUTEX(videodev_lock);
 428
 429 struct video_device* video_devdata(struct file *file)
 430 {
 431         return video_device[iminor(file->f_path.dentry->d_inode)];
 432 }
 433 EXPORT_SYMBOL(video_devdata);
 434
 435 /*
 436  *      Open a video device - FIXME: Obsoleted
 437  */
 438 static int video_open(struct inode *inode, struct file *file)
 439 {
 440         unsigned int minor = iminor(inode);
 441         int err = 0;
 442         struct video_device *vfl;
 443         const struct file_operations *old_fops;
 444
 445         if(minor>=VIDEO_NUM_DEVICES)
 446                 return -ENODEV;
 447         lock_kernel();
 448         mutex_lock(&videodev_lock);
 449         vfl=video_device[minor];
 450         if(vfl==NULL) {
 451                 mutex_unlock(&videodev_lock);
 452                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 453                 mutex_lock(&videodev_lock);
 454                 vfl=video_device[minor];
 455                 if (vfl==NULL) {
 456                         mutex_unlock(&videodev_lock);
 457                         unlock_kernel();
 458                         return -ENODEV;
 459                 }
 460         }
 461         old_fops = file->f_op;
 462         file->f_op = fops_get(vfl->fops);
 463         if(file->f_op->open)
 464                 err = file->f_op->open(inode,file);
 465         if (err) {
 466                 fops_put(file->f_op);
 467                 file->f_op = fops_get(old_fops);
 468         }
 469         fops_put(old_fops);
 470         mutex_unlock(&videodev_lock);
 471         unlock_kernel();
 472         return err;
 473 }
 474
 475 /*
 476  * helper function -- handles userspace copying for ioctl arguments
 477  */
 478
 479 #ifdef __OLD_VIDIOC_
 480 static unsigned int
 481 video_fix_command(unsigned int cmd)
 482 {
 483         switch (cmd) {
 484         case VIDIOC_OVERLAY_OLD:
 485                 cmd = VIDIOC_OVERLAY;
 486                 break;
 487         case VIDIOC_S_PARM_OLD:
 488                 cmd = VIDIOC_S_PARM;
 489                 break;
 490         case VIDIOC_S_CTRL_OLD:
 491                 cmd = VIDIOC_S_CTRL;
 492                 break;
 493         case VIDIOC_G_AUDIO_OLD:
 494                 cmd = VIDIOC_G_AUDIO;
 495                 break;
 496         case VIDIOC_G_AUDOUT_OLD:
 497                 cmd = VIDIOC_G_AUDOUT;
 498                 break;
 499         case VIDIOC_CROPCAP_OLD:
 500                 cmd = VIDIOC_CROPCAP;
 501                 break;
 502         }
 503         return cmd;
 504 }
 505 #endif
 506
 507 /*
 508  * Obsolete usercopy function - Should be removed soon
 509  */
 510 int
 511 video_usercopy(struct inode *inode, struct file *file,
 512                unsigned int cmd, unsigned long arg,
 513                int (*func)(struct inode *inode, struct file *file,
 514                            unsigned int cmd, void *arg))
 515 {
 516         char    sbuf[128];
 517         void    *mbuf = NULL;
 518         void    *parg = NULL;
 519         int     err  = -EINVAL;
 520         int     is_ext_ctrl;
 521         size_t  ctrls_size = 0;
 522         void __user *user_ptr = NULL;
 523
 524 #ifdef __OLD_VIDIOC_
 525         cmd = video_fix_command(cmd);
 526 #endif
 527         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 528                        cmd == VIDIOC_TRY_EXT_CTRLS);
 529
 530         /*  Copy arguments into temp kernel buffer  */
 531         switch (_IOC_DIR(cmd)) {
 532         case _IOC_NONE:
 533                 parg = NULL;
 534                 break;
 535         case _IOC_READ:
 536         case _IOC_WRITE:
 537         case (_IOC_WRITE | _IOC_READ):
 538                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 539                         parg = sbuf;
 540                 } else {
 541                         /* too big to allocate from stack */
 542                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 543                         if (NULL == mbuf)
 544                                 return -ENOMEM;
 545                         parg = mbuf;
 546                 }
 547
 548                 err = -EFAULT;
 549                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 550                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 551                                 goto out;
 552                 break;
 553         }
 554         if (is_ext_ctrl) {
 555                 struct v4l2_ext_controls *p = parg;
 556
 557                 /* In case of an error, tell the caller that it wasn't
 558                    a specific control that caused it. */
 559                 p->error_idx = p->count;
 560                 user_ptr = (void __user *)p->controls;
 561                 if (p->count) {
 562                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 563                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 564                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 565                         err = -ENOMEM;
 566                         if (NULL == mbuf)
 567                                 goto out_ext_ctrl;
 568                         err = -EFAULT;
 569                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 570                                 goto out_ext_ctrl;
 571                         p->controls = mbuf;
 572                 }
 573         }
 574
 575         /* call driver */
 576         err = func(inode, file, cmd, parg);
 577         if (err == -ENOIOCTLCMD)
 578                 err = -EINVAL;
 579         if (is_ext_ctrl) {
 580                 struct v4l2_ext_controls *p = parg;
 581
 582                 p->controls = (void *)user_ptr;
 583                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 584                         err = -EFAULT;
 585                 goto out_ext_ctrl;
 586         }
 587         if (err < 0)
 588                 goto out;
 589
 590 out_ext_ctrl:
 591         /*  Copy results into user buffer  */
 592         switch (_IOC_DIR(cmd))
 593         {
 594         case _IOC_READ:
 595         case (_IOC_WRITE | _IOC_READ):
 596                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 597                         err = -EFAULT;
 598                 break;
 599         }
 600
 601 out:
 602         kfree(mbuf);
 603         return err;
 604 }
 605 EXPORT_SYMBOL(video_usercopy);
 606
 607 /*
 608  * open/release helper functions -- handle exclusive opens
 609  * Should be removed soon
 610  */
 611 int video_exclusive_open(struct inode *inode, struct file *file)
 612 {
 613         struct  video_device *vfl = video_devdata(file);
 614         int retval = 0;
 615
 616         mutex_lock(&vfl->lock);
 617         if (vfl->users) {
 618                 retval = -EBUSY;
 619         } else {
 620                 vfl->users++;
 621         }
 622         mutex_unlock(&vfl->lock);
 623         return retval;
 624 }
 625 EXPORT_SYMBOL(video_exclusive_open);
 626
 627 int video_exclusive_release(struct inode *inode, struct file *file)
 628 {
 629         struct  video_device *vfl = video_devdata(file);
 630
 631         vfl->users--;
 632         return 0;
 633 }
 634 EXPORT_SYMBOL(video_exclusive_release);
 635
 636 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 637                                         struct v4l2_buffer *p)
 638 {
 639         struct v4l2_timecode *tc=&p->timecode;
 640
 641         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 642                 "bytesused=%d, flags=0x%08d, "
 643                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 644                         (p->timestamp.tv_sec/3600),
 645                         (int)(p->timestamp.tv_sec/60)%60,
 646                         (int)(p->timestamp.tv_sec%60),
 647                         p->timestamp.tv_usec,
 648                         p->index,
 649                         prt_names(p->type, v4l2_type_names),
 650                         p->bytesused, p->flags,
 651                         p->field, p->sequence,
 652                         prt_names(p->memory, v4l2_memory_names),
 653                         p->m.userptr, p->length);
 654         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
 655                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 656                         tc->hours,tc->minutes,tc->seconds,
 657                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 658 }
 659
 660 static inline void dbgrect(struct video_device *vfd, char *s,
 661                                                         struct v4l2_rect *r)
 662 {
 663         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
 664                                                 r->width, r->height);
 665 };
 666
 667 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 668                                                 struct v4l2_pix_format *fmt)
 669 {
 670         dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 671                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 672                 fmt->width,fmt->height,
 673                 (fmt->pixelformat & 0xff),
 674                 (fmt->pixelformat >>  8) & 0xff,
 675                 (fmt->pixelformat >> 16) & 0xff,
 676                 (fmt->pixelformat >> 24) & 0xff,
 677                 prt_names(fmt->field, v4l2_field_names),
 678                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 679 };
 680
 681
 682 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 683 {
 684         switch (type) {
 685         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 686                 if (vfd->vidioc_try_fmt_cap)
 687                         return (0);
 688                 break;
 689         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 690                 if (vfd->vidioc_try_fmt_overlay)
 691                         return (0);
 692                 break;
 693         case V4L2_BUF_TYPE_VBI_CAPTURE:
 694                 if (vfd->vidioc_try_fmt_vbi)
 695                         return (0);
 696                 break;
 697         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 698                 if (vfd->vidioc_try_fmt_vbi_output)
 699                         return (0);
 700                 break;
 701         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 702                 if (vfd->vidioc_try_fmt_vbi_capture)
 703                         return (0);
 704                 break;
 705         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 706                 if (vfd->vidioc_try_fmt_video_output)
 707                         return (0);
 708                 break;
 709         case V4L2_BUF_TYPE_VBI_OUTPUT:
 710                 if (vfd->vidioc_try_fmt_vbi_output)
 711                         return (0);
 712                 break;
 713         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 714                 if (vfd->vidioc_try_fmt_output_overlay)
 715                         return (0);
 716                 break;
 717         case V4L2_BUF_TYPE_PRIVATE:
 718                 if (vfd->vidioc_try_fmt_type_private)
 719                         return (0);
 720                 break;
 721         }
 722         return (-EINVAL);
 723 }
 724
 725 static int __video_do_ioctl(struct inode *inode, struct file *file,
 726                 unsigned int cmd, void *arg)
 727 {
 728         struct video_device *vfd = video_devdata(file);
 729         void                 *fh = file->private_data;
 730         int                  ret = -EINVAL;
 731
 732         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 733                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 734                 v4l_print_ioctl(vfd->name, cmd);
 735                 printk("\n");
 736         }
 737
 738 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 739         /***********************************************************
 740          Handles calls to the obsoleted V4L1 API
 741          Due to the nature of VIDIOCGMBUF, each driver that supports
 742          V4L1 should implement its own handler for this ioctl.
 743          ***********************************************************/
 744
 745         /* --- streaming capture ------------------------------------- */
 746         if (cmd == VIDIOCGMBUF) {
 747                 struct video_mbuf *p=arg;
 748
 749                 memset(p, 0, sizeof(*p));
 750
 751                 if (!vfd->vidiocgmbuf)
 752                         return ret;
 753                 ret=vfd->vidiocgmbuf(file, fh, p);
 754                 if (!ret)
 755                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 756                                                 p->size, p->frames,
 757                                                 (unsigned long)p->offsets);
 758                 return ret;
 759         }
 760
 761         /********************************************************
 762          All other V4L1 calls are handled by v4l1_compat module.
 763          Those calls will be translated into V4L2 calls, and
 764          __video_do_ioctl will be called again, with one or more
 765          V4L2 ioctls.
 766          ********************************************************/
 767         if (_IOC_TYPE(cmd)=='v')
 768                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 769                                                 __video_do_ioctl);
 770 #endif
 771
 772         switch(cmd) {
 773         /* --- capabilities ------------------------------------------ */
 774         case VIDIOC_QUERYCAP:
 775         {
 776                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 777                 memset(cap, 0, sizeof(*cap));
 778
 779                 if (!vfd->vidioc_querycap)
 780                         break;
 781
 782                 ret=vfd->vidioc_querycap(file, fh, cap);
 783                 if (!ret)
 784                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 785                                         "version=0x%08x, "
 786                                         "capabilities=0x%08x\n",
 787                                         cap->driver,cap->card,cap->bus_info,
 788                                         cap->version,
 789                                         cap->capabilities);
 790                 break;
 791         }
 792
 793         /* --- priority ------------------------------------------ */
 794         case VIDIOC_G_PRIORITY:
 795         {
 796                 enum v4l2_priority *p=arg;
 797
 798                 if (!vfd->vidioc_g_priority)
 799                         break;
 800                 ret=vfd->vidioc_g_priority(file, fh, p);
 801                 if (!ret)
 802                         dbgarg(cmd, "priority is %d\n", *p);
 803                 break;
 804         }
 805         case VIDIOC_S_PRIORITY:
 806         {
 807                 enum v4l2_priority *p=arg;
 808
 809                 if (!vfd->vidioc_s_priority)
 810                         break;
 811                 dbgarg(cmd, "setting priority to %d\n", *p);
 812                 ret=vfd->vidioc_s_priority(file, fh, *p);
 813                 break;
 814         }
 815
 816         /* --- capture ioctls ---------------------------------------- */
 817         case VIDIOC_ENUM_FMT:
 818         {
 819                 struct v4l2_fmtdesc *f = arg;
 820                 enum v4l2_buf_type type;
 821                 unsigned int index;
 822
 823                 index = f->index;
 824                 type  = f->type;
 825                 memset(f,0,sizeof(*f));
 826                 f->index = index;
 827                 f->type  = type;
 828
 829                 switch (type) {
 830                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 831                         if (vfd->vidioc_enum_fmt_cap)
 832                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
 833                         break;
 834                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 835                         if (vfd->vidioc_enum_fmt_overlay)
 836                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
 837                         break;
 838                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 839                         if (vfd->vidioc_enum_fmt_vbi)
 840                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
 841                         break;
 842                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 843                         if (vfd->vidioc_enum_fmt_vbi_output)
 844                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 845                                                                 fh, f);
 846                         break;
 847                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 848                         if (vfd->vidioc_enum_fmt_vbi_capture)
 849                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
 850                                                                 fh, f);
 851                         break;
 852                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 853                         if (vfd->vidioc_enum_fmt_video_output)
 854                                 ret=vfd->vidioc_enum_fmt_video_output(file,
 855                                                                 fh, f);
 856                         break;
 857                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 858                         if (vfd->vidioc_enum_fmt_vbi_output)
 859                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
 860                                                                 fh, f);
 861                         break;
 862                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 863                         if (vfd->vidioc_enum_fmt_output_overlay)
 864                                 ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
 865                         break;
 866                 case V4L2_BUF_TYPE_PRIVATE:
 867                         if (vfd->vidioc_enum_fmt_type_private)
 868                                 ret=vfd->vidioc_enum_fmt_type_private(file,
 869                                                                 fh, f);
 870                         break;
 871                 }
 872                 if (!ret)
 873                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 874                                         "pixelformat=%c%c%c%c, description='%s'\n",
 875                                         f->index, f->type, f->flags,
 876                                         (f->pixelformat & 0xff),
 877                                         (f->pixelformat >>  8) & 0xff,
 878                                         (f->pixelformat >> 16) & 0xff,
 879                                         (f->pixelformat >> 24) & 0xff,
 880                                         f->description);
 881                 break;
 882         }
 883         case VIDIOC_G_FMT:
 884         {
 885                 struct v4l2_format *f = (struct v4l2_format *)arg;
 886
 887                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
 888
 889                 /* FIXME: Should be one dump per type */
 890                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 891
 892                 switch (f->type) {
 893                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 894                         if (vfd->vidioc_g_fmt_cap)
 895                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
 896                         if (!ret)
 897                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 898                         break;
 899                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 900                         if (vfd->vidioc_g_fmt_overlay)
 901                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
 902                         break;
 903                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 904                         if (vfd->vidioc_g_fmt_vbi)
 905                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
 906                         break;
 907                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 908                         if (vfd->vidioc_g_fmt_vbi_output)
 909                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 910                         break;
 911                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 912                         if (vfd->vidioc_g_fmt_vbi_capture)
 913                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
 914                         break;
 915                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 916                         if (vfd->vidioc_g_fmt_video_output)
 917                                 ret=vfd->vidioc_g_fmt_video_output(file,
 918                                                                 fh, f);
 919                         break;
 920                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 921                         if (vfd->vidioc_g_fmt_output_overlay)
 922                                 ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
 923                         break;
 924                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 925                         if (vfd->vidioc_g_fmt_vbi_output)
 926                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
 927                         break;
 928                 case V4L2_BUF_TYPE_PRIVATE:
 929                         if (vfd->vidioc_g_fmt_type_private)
 930                                 ret=vfd->vidioc_g_fmt_type_private(file,
 931                                                                 fh, f);
 932                         break;
 933                 }
 934
 935                 break;
 936         }
 937         case VIDIOC_S_FMT:
 938         {
 939                 struct v4l2_format *f = (struct v4l2_format *)arg;
 940
 941                 /* FIXME: Should be one dump per type */
 942                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 943                                         v4l2_type_names));
 944
 945                 switch (f->type) {
 946                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 947                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 948                         if (vfd->vidioc_s_fmt_cap)
 949                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
 950                         break;
 951                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 952                         if (vfd->vidioc_s_fmt_overlay)
 953                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
 954                         break;
 955                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 956                         if (vfd->vidioc_s_fmt_vbi)
 957                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
 958                         break;
 959                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 960                         if (vfd->vidioc_s_fmt_vbi_output)
 961                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
 962                         break;
 963                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 964                         if (vfd->vidioc_s_fmt_vbi_capture)
 965                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
 966                         break;
 967                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 968                         if (vfd->vidioc_s_fmt_video_output)
 969                                 ret=vfd->vidioc_s_fmt_video_output(file,
 970                                                                 fh, f);
 971                         break;
 972                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 973                         if (vfd->vidioc_s_fmt_output_overlay)
 974                                 ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
 975                         break;
 976                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 977                         if (vfd->vidioc_s_fmt_vbi_output)
 978                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
 979                                                                 fh, f);
 980                         break;
 981                 case V4L2_BUF_TYPE_PRIVATE:
 982                         if (vfd->vidioc_s_fmt_type_private)
 983                                 ret=vfd->vidioc_s_fmt_type_private(file,
 984                                                                 fh, f);
 985                         break;
 986                 }
 987                 break;
 988         }
 989         case VIDIOC_TRY_FMT:
 990         {
 991                 struct v4l2_format *f = (struct v4l2_format *)arg;
 992
 993                 /* FIXME: Should be one dump per type */
 994                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 995                                                 v4l2_type_names));
 996                 switch (f->type) {
 997                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 998                         if (vfd->vidioc_try_fmt_cap)
 999                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
1000                         if (!ret)
1001                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
1002                         break;
1003                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1004                         if (vfd->vidioc_try_fmt_overlay)
1005                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
1006                         break;
1007                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1008                         if (vfd->vidioc_try_fmt_vbi)
1009                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
1010                         break;
1011                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1012                         if (vfd->vidioc_try_fmt_vbi_output)
1013                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
1014                                                                 fh, f);
1015                         break;
1016                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1017                         if (vfd->vidioc_try_fmt_vbi_capture)
1018                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
1019                                                                 fh, f);
1020                         break;
1021                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1022                         if (vfd->vidioc_try_fmt_video_output)
1023                                 ret=vfd->vidioc_try_fmt_video_output(file,
1024                                                                 fh, f);
1025                         break;
1026                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1027                         if (vfd->vidioc_try_fmt_output_overlay)
1028                                 ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
1029                         break;
1030                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1031                         if (vfd->vidioc_try_fmt_vbi_output)
1032                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
1033                                                                 fh, f);
1034                         break;
1035                 case V4L2_BUF_TYPE_PRIVATE:
1036                         if (vfd->vidioc_try_fmt_type_private)
1037                                 ret=vfd->vidioc_try_fmt_type_private(file,
1038                                                                 fh, f);
1039                         break;
1040                 }
1041
1042                 break;
1043         }
1044         /* FIXME: Those buf reqs could be handled here,
1045            with some changes on videobuf to allow its header to be included at
1046            videodev2.h or being merged at videodev2.
1047          */
1048         case VIDIOC_REQBUFS:
1049         {
1050                 struct v4l2_requestbuffers *p=arg;
1051
1052                 if (!vfd->vidioc_reqbufs)
1053                         break;
1054                 ret = check_fmt (vfd, p->type);
1055                 if (ret)
1056                         break;
1057
1058                 ret=vfd->vidioc_reqbufs(file, fh, p);
1059                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
1060                                 p->count,
1061                                 prt_names(p->type, v4l2_type_names),
1062                                 prt_names(p->memory, v4l2_memory_names));
1063                 break;
1064         }
1065         case VIDIOC_QUERYBUF:
1066         {
1067                 struct v4l2_buffer *p=arg;
1068
1069                 if (!vfd->vidioc_querybuf)
1070                         break;
1071                 ret = check_fmt (vfd, p->type);
1072                 if (ret)
1073                         break;
1074
1075                 ret=vfd->vidioc_querybuf(file, fh, p);
1076                 if (!ret)
1077                         dbgbuf(cmd,vfd,p);
1078                 break;
1079         }
1080         case VIDIOC_QBUF:
1081         {
1082                 struct v4l2_buffer *p=arg;
1083
1084                 if (!vfd->vidioc_qbuf)
1085                         break;
1086                 ret = check_fmt (vfd, p->type);
1087                 if (ret)
1088                         break;
1089
1090                 ret=vfd->vidioc_qbuf(file, fh, p);
1091                 if (!ret)
1092                         dbgbuf(cmd,vfd,p);
1093                 break;
1094         }
1095         case VIDIOC_DQBUF:
1096         {
1097                 struct v4l2_buffer *p=arg;
1098                 if (!vfd->vidioc_dqbuf)
1099                         break;
1100                 ret = check_fmt (vfd, p->type);
1101                 if (ret)
1102                         break;
1103
1104                 ret=vfd->vidioc_dqbuf(file, fh, p);
1105                 if (!ret)
1106                         dbgbuf(cmd,vfd,p);
1107                 break;
1108         }
1109         case VIDIOC_OVERLAY:
1110         {
1111                 int *i = arg;
1112
1113                 if (!vfd->vidioc_overlay)
1114                         break;
1115                 dbgarg (cmd, "value=%d\n",*i);
1116                 ret=vfd->vidioc_overlay(file, fh, *i);
1117                 break;
1118         }
1119         case VIDIOC_G_FBUF:
1120         {
1121                 struct v4l2_framebuffer *p=arg;
1122                 if (!vfd->vidioc_g_fbuf)
1123                         break;
1124                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
1125                 if (!ret) {
1126                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
1127                                         p->capability,p->flags,
1128                                         (unsigned long)p->base);
1129                         v4l_print_pix_fmt (vfd, &p->fmt);
1130                 }
1131                 break;
1132         }
1133         case VIDIOC_S_FBUF:
1134         {
1135                 struct v4l2_framebuffer *p=arg;
1136                 if (!vfd->vidioc_s_fbuf)
1137                         break;
1138
1139                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
1140                                 p->capability,p->flags,(unsigned long)p->base);
1141                 v4l_print_pix_fmt (vfd, &p->fmt);
1142                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
1143
1144                 break;
1145         }
1146         case VIDIOC_STREAMON:
1147         {
1148                 enum v4l2_buf_type i = *(int *)arg;
1149                 if (!vfd->vidioc_streamon)
1150                         break;
1151                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1152                 ret=vfd->vidioc_streamon(file, fh,i);
1153                 break;
1154         }
1155         case VIDIOC_STREAMOFF:
1156         {
1157                 enum v4l2_buf_type i = *(int *)arg;
1158
1159                 if (!vfd->vidioc_streamoff)
1160                         break;
1161                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1162                 ret=vfd->vidioc_streamoff(file, fh, i);
1163                 break;
1164         }
1165         /* ---------- tv norms ---------- */
1166         case VIDIOC_ENUMSTD:
1167         {
1168                 struct v4l2_standard *p = arg;
1169                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1170                 unsigned int index = p->index, i, j = 0;
1171                 const char *descr = "";
1172
1173                 /* Return norm array in a canonical way */
1174                 for (i = 0; i <= index && id; i++) {
1175                         /* last std value in the standards array is 0, so this
1176                            while always ends there since (id & 0) == 0. */
1177                         while ((id & standards[j].std) != standards[j].std)
1178                                 j++;
1179                         curr_id = standards[j].std;
1180                         descr = standards[j].descr;
1181                         j++;
1182                         if (curr_id == 0)
1183                                 break;
1184                         if (curr_id != V4L2_STD_PAL &&
1185                             curr_id != V4L2_STD_SECAM &&
1186                             curr_id != V4L2_STD_NTSC)
1187                                 id &= ~curr_id;
1188                 }
1189                 if (i <= index)
1190                         return -EINVAL;
1191
1192                 v4l2_video_std_construct(p, curr_id, descr);
1193                 p->index = index;
1194
1195                 dbgarg(cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
1196                                 "framelines=%d\n", p->index,
1197                                 (unsigned long long)p->id, p->name,
1198                                 p->frameperiod.numerator,
1199                                 p->frameperiod.denominator,
1200                                 p->framelines);
1201
1202                 ret = 0;
1203                 break;
1204         }
1205         case VIDIOC_G_STD:
1206         {
1207                 v4l2_std_id *id = arg;
1208
1209                 *id = vfd->current_norm;
1210
1211                 dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
1212
1213                 ret=0;
1214                 break;
1215         }
1216         case VIDIOC_S_STD:
1217         {
1218                 v4l2_std_id *id = arg,norm;
1219
1220                 dbgarg (cmd, "value=%08Lx\n", (long long unsigned) *id);
1221
1222                 norm = (*id) & vfd->tvnorms;
1223                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
1224                         break;
1225
1226                 /* Calls the specific handler */
1227                 if (vfd->vidioc_s_std)
1228                         ret=vfd->vidioc_s_std(file, fh, &norm);
1229                 else
1230                         ret=-EINVAL;
1231
1232                 /* Updates standard information */
1233                 if (ret>=0)
1234                         vfd->current_norm=norm;
1235
1236                 break;
1237         }
1238         case VIDIOC_QUERYSTD:
1239         {
1240                 v4l2_std_id *p=arg;
1241
1242                 if (!vfd->vidioc_querystd)
1243                         break;
1244                 ret=vfd->vidioc_querystd(file, fh, arg);
1245                 if (!ret)
1246                         dbgarg (cmd, "detected std=%08Lx\n",
1247                                                 (unsigned long long)*p);
1248                 break;
1249         }
1250         /* ------ input switching ---------- */
1251         /* FIXME: Inputs can be handled inside videodev2 */
1252         case VIDIOC_ENUMINPUT:
1253         {
1254                 struct v4l2_input *p=arg;
1255                 int i=p->index;
1256
1257                 if (!vfd->vidioc_enum_input)
1258                         break;
1259                 memset(p, 0, sizeof(*p));
1260                 p->index=i;
1261
1262                 ret=vfd->vidioc_enum_input(file, fh, p);
1263                 if (!ret)
1264                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1265                                         "audioset=%d, "
1266                                         "tuner=%d, std=%08Lx, status=%d\n",
1267                                         p->index,p->name,p->type,p->audioset,
1268                                         p->tuner,
1269                                         (unsigned long long)p->std,
1270                                         p->status);
1271                 break;
1272         }
1273         case VIDIOC_G_INPUT:
1274         {
1275                 unsigned int *i = arg;
1276
1277                 if (!vfd->vidioc_g_input)
1278                         break;
1279                 ret=vfd->vidioc_g_input(file, fh, i);
1280                 if (!ret)
1281                         dbgarg (cmd, "value=%d\n",*i);
1282                 break;
1283         }
1284         case VIDIOC_S_INPUT:
1285         {
1286                 unsigned int *i = arg;
1287
1288                 if (!vfd->vidioc_s_input)
1289                         break;
1290                 dbgarg (cmd, "value=%d\n",*i);
1291                 ret=vfd->vidioc_s_input(file, fh, *i);
1292                 break;
1293         }
1294
1295         /* ------ output switching ---------- */
1296         case VIDIOC_G_OUTPUT:
1297         {
1298                 unsigned int *i = arg;
1299
1300                 if (!vfd->vidioc_g_output)
1301                         break;
1302                 ret=vfd->vidioc_g_output(file, fh, i);
1303                 if (!ret)
1304                         dbgarg (cmd, "value=%d\n",*i);
1305                 break;
1306         }
1307         case VIDIOC_S_OUTPUT:
1308         {
1309                 unsigned int *i = arg;
1310
1311                 if (!vfd->vidioc_s_output)
1312                         break;
1313                 dbgarg (cmd, "value=%d\n",*i);
1314                 ret=vfd->vidioc_s_output(file, fh, *i);
1315                 break;
1316         }
1317
1318         /* --- controls ---------------------------------------------- */
1319         case VIDIOC_QUERYCTRL:
1320         {
1321                 struct v4l2_queryctrl *p=arg;
1322
1323                 if (!vfd->vidioc_queryctrl)
1324                         break;
1325                 ret=vfd->vidioc_queryctrl(file, fh, p);
1326
1327                 if (!ret)
1328                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1329                                         "min/max=%d/%d,"
1330                                         " step=%d, default=%d, flags=0x%08x\n",
1331                                         p->id,p->type,p->name,p->minimum,
1332                                         p->maximum,p->step,p->default_value,
1333                                         p->flags);
1334                 break;
1335         }
1336         case VIDIOC_G_CTRL:
1337         {
1338                 struct v4l2_control *p = arg;
1339
1340                 if (!vfd->vidioc_g_ctrl)
1341                         break;
1342                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1343
1344                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1345                 if (!ret)
1346                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1347                 break;
1348         }
1349         case VIDIOC_S_CTRL:
1350         {
1351                 struct v4l2_control *p = arg;
1352
1353                 if (!vfd->vidioc_s_ctrl)
1354                         break;
1355                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1356
1357                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1358                 break;
1359         }
1360         case VIDIOC_G_EXT_CTRLS:
1361         {
1362                 struct v4l2_ext_controls *p = arg;
1363
1364                 if (vfd->vidioc_g_ext_ctrls) {
1365                         dbgarg(cmd, "count=%d\n", p->count);
1366
1367                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1368                 }
1369                 break;
1370         }
1371         case VIDIOC_S_EXT_CTRLS:
1372         {
1373                 struct v4l2_ext_controls *p = arg;
1374
1375                 if (vfd->vidioc_s_ext_ctrls) {
1376                         dbgarg(cmd, "count=%d\n", p->count);
1377
1378                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1379                 }
1380                 break;
1381         }
1382         case VIDIOC_TRY_EXT_CTRLS:
1383         {
1384                 struct v4l2_ext_controls *p = arg;
1385
1386                 if (vfd->vidioc_try_ext_ctrls) {
1387                         dbgarg(cmd, "count=%d\n", p->count);
1388
1389                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1390                 }
1391                 break;
1392         }
1393         case VIDIOC_QUERYMENU:
1394         {
1395                 struct v4l2_querymenu *p=arg;
1396                 if (!vfd->vidioc_querymenu)
1397                         break;
1398                 ret=vfd->vidioc_querymenu(file, fh, p);
1399                 if (!ret)
1400                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1401                                                 p->id,p->index,p->name);
1402                 break;
1403         }
1404         /* --- audio ---------------------------------------------- */
1405         case VIDIOC_ENUMAUDIO:
1406         {
1407                 struct v4l2_audio *p=arg;
1408
1409                 if (!vfd->vidioc_enumaudio)
1410                         break;
1411                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1412                 ret=vfd->vidioc_enumaudio(file, fh, p);
1413                 if (!ret)
1414                         dbgarg2("index=%d, name=%s, capability=%d, "
1415                                         "mode=%d\n",p->index,p->name,
1416                                         p->capability, p->mode);
1417                 break;
1418         }
1419         case VIDIOC_G_AUDIO:
1420         {
1421                 struct v4l2_audio *p=arg;
1422                 __u32 index=p->index;
1423
1424                 if (!vfd->vidioc_g_audio)
1425                         break;
1426
1427                 memset(p,0,sizeof(*p));
1428                 p->index=index;
1429                 dbgarg(cmd, "Get for index=%d\n", p->index);
1430                 ret=vfd->vidioc_g_audio(file, fh, p);
1431                 if (!ret)
1432                         dbgarg2("index=%d, name=%s, capability=%d, "
1433                                         "mode=%d\n",p->index,
1434                                         p->name,p->capability, p->mode);
1435                 break;
1436         }
1437         case VIDIOC_S_AUDIO:
1438         {
1439                 struct v4l2_audio *p=arg;
1440
1441                 if (!vfd->vidioc_s_audio)
1442                         break;
1443                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1444                                         "mode=%d\n", p->index, p->name,
1445                                         p->capability, p->mode);
1446                 ret=vfd->vidioc_s_audio(file, fh, p);
1447                 break;
1448         }
1449         case VIDIOC_ENUMAUDOUT:
1450         {
1451                 struct v4l2_audioout *p=arg;
1452
1453                 if (!vfd->vidioc_enumaudout)
1454                         break;
1455                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1456                 ret=vfd->vidioc_enumaudout(file, fh, p);
1457                 if (!ret)
1458                         dbgarg2("index=%d, name=%s, capability=%d, "
1459                                         "mode=%d\n", p->index, p->name,
1460                                         p->capability,p->mode);
1461                 break;
1462         }
1463         case VIDIOC_G_AUDOUT:
1464         {
1465                 struct v4l2_audioout *p=arg;
1466
1467                 if (!vfd->vidioc_g_audout)
1468                         break;
1469                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1470                 ret=vfd->vidioc_g_audout(file, fh, p);
1471                 if (!ret)
1472                         dbgarg2("index=%d, name=%s, capability=%d, "
1473                                         "mode=%d\n", p->index, p->name,
1474                                         p->capability,p->mode);
1475                 break;
1476         }
1477         case VIDIOC_S_AUDOUT:
1478         {
1479                 struct v4l2_audioout *p=arg;
1480
1481                 if (!vfd->vidioc_s_audout)
1482                         break;
1483                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1484                                         "mode=%d\n", p->index, p->name,
1485                                         p->capability,p->mode);
1486
1487                 ret=vfd->vidioc_s_audout(file, fh, p);
1488                 break;
1489         }
1490         case VIDIOC_G_MODULATOR:
1491         {
1492                 struct v4l2_modulator *p=arg;
1493                 if (!vfd->vidioc_g_modulator)
1494                         break;
1495                 ret=vfd->vidioc_g_modulator(file, fh, p);
1496                 if (!ret)
1497                         dbgarg(cmd, "index=%d, name=%s, "
1498                                         "capability=%d, rangelow=%d,"
1499                                         " rangehigh=%d, txsubchans=%d\n",
1500                                         p->index, p->name,p->capability,
1501                                         p->rangelow, p->rangehigh,
1502                                         p->txsubchans);
1503                 break;
1504         }
1505         case VIDIOC_S_MODULATOR:
1506         {
1507                 struct v4l2_modulator *p=arg;
1508                 if (!vfd->vidioc_s_modulator)
1509                         break;
1510                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1511                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1512                                 p->index, p->name,p->capability,p->rangelow,
1513                                 p->rangehigh,p->txsubchans);
1514                         ret=vfd->vidioc_s_modulator(file, fh, p);
1515                 break;
1516         }
1517         case VIDIOC_G_CROP:
1518         {
1519                 struct v4l2_crop *p=arg;
1520                 if (!vfd->vidioc_g_crop)
1521                         break;
1522                 ret=vfd->vidioc_g_crop(file, fh, p);
1523                 if (!ret) {
1524                         dbgarg(cmd, "type=%d\n", p->type);
1525                         dbgrect(vfd, "", &p->c);
1526                 }
1527                 break;
1528         }
1529         case VIDIOC_S_CROP:
1530         {
1531                 struct v4l2_crop *p=arg;
1532                 if (!vfd->vidioc_s_crop)
1533                         break;
1534                 dbgarg(cmd, "type=%d\n", p->type);
1535                 dbgrect(vfd, "", &p->c);
1536                 ret=vfd->vidioc_s_crop(file, fh, p);
1537                 break;
1538         }
1539         case VIDIOC_CROPCAP:
1540         {
1541                 struct v4l2_cropcap *p=arg;
1542                 /*FIXME: Should also show v4l2_fract pixelaspect */
1543                 if (!vfd->vidioc_cropcap)
1544                         break;
1545                 dbgarg(cmd, "type=%d\n", p->type);
1546                 dbgrect(vfd, "bounds ", &p->bounds);
1547                 dbgrect(vfd, "defrect ", &p->defrect);
1548                 ret=vfd->vidioc_cropcap(file, fh, p);
1549                 break;
1550         }
1551         case VIDIOC_G_JPEGCOMP:
1552         {
1553                 struct v4l2_jpegcompression *p=arg;
1554                 if (!vfd->vidioc_g_jpegcomp)
1555                         break;
1556                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1557                 if (!ret)
1558                         dbgarg (cmd, "quality=%d, APPn=%d, "
1559                                                 "APP_len=%d, COM_len=%d, "
1560                                                 "jpeg_markers=%d\n",
1561                                                 p->quality,p->APPn,p->APP_len,
1562                                                 p->COM_len,p->jpeg_markers);
1563                 break;
1564         }
1565         case VIDIOC_S_JPEGCOMP:
1566         {
1567                 struct v4l2_jpegcompression *p=arg;
1568                 if (!vfd->vidioc_g_jpegcomp)
1569                         break;
1570                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1571                                         "COM_len=%d, jpeg_markers=%d\n",
1572                                         p->quality,p->APPn,p->APP_len,
1573                                         p->COM_len,p->jpeg_markers);
1574                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1575                 break;
1576         }
1577         case VIDIOC_G_ENC_INDEX:
1578         {
1579                 struct v4l2_enc_idx *p=arg;
1580
1581                 if (!vfd->vidioc_g_enc_index)
1582                         break;
1583                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1584                 if (!ret)
1585                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1586                                         p->entries,p->entries_cap);
1587                 break;
1588         }
1589         case VIDIOC_ENCODER_CMD:
1590         {
1591                 struct v4l2_encoder_cmd *p=arg;
1592
1593                 if (!vfd->vidioc_encoder_cmd)
1594                         break;
1595                 ret=vfd->vidioc_encoder_cmd(file, fh, p);
1596                 if (!ret)
1597                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1598                                         p->cmd,p->flags);
1599                 break;
1600         }
1601         case VIDIOC_TRY_ENCODER_CMD:
1602         {
1603                 struct v4l2_encoder_cmd *p=arg;
1604
1605                 if (!vfd->vidioc_try_encoder_cmd)
1606                         break;
1607                 ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
1608                 if (!ret)
1609                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1610                                         p->cmd,p->flags);
1611                 break;
1612         }
1613         case VIDIOC_G_PARM:
1614         {
1615                 struct v4l2_streamparm *p=arg;
1616                 __u32 type=p->type;
1617
1618                 memset(p,0,sizeof(*p));
1619                 p->type=type;
1620
1621                 if (vfd->vidioc_g_parm) {
1622                         ret=vfd->vidioc_g_parm(file, fh, p);
1623                 } else {
1624                         struct v4l2_standard s;
1625
1626                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1627                                 return -EINVAL;
1628
1629                         v4l2_video_std_construct(&s, vfd->current_norm,
1630                                                  v4l2_norm_to_name(vfd->current_norm));
1631
1632                         p->parm.capture.timeperframe = s.frameperiod;
1633                         ret=0;
1634                 }
1635
1636                 dbgarg (cmd, "type=%d\n", p->type);
1637                 break;
1638         }
1639         case VIDIOC_S_PARM:
1640         {
1641                 struct v4l2_streamparm *p=arg;
1642                 if (!vfd->vidioc_s_parm)
1643                         break;
1644                 dbgarg (cmd, "type=%d\n", p->type);
1645                 ret=vfd->vidioc_s_parm(file, fh, p);
1646                 break;
1647         }
1648         case VIDIOC_G_TUNER:
1649         {
1650                 struct v4l2_tuner *p=arg;
1651                 __u32 index=p->index;
1652
1653                 if (!vfd->vidioc_g_tuner)
1654                         break;
1655
1656                 memset(p,0,sizeof(*p));
1657                 p->index=index;
1658
1659                 ret=vfd->vidioc_g_tuner(file, fh, p);
1660                 if (!ret)
1661                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1662                                         "capability=%d, rangelow=%d, "
1663                                         "rangehigh=%d, signal=%d, afc=%d, "
1664                                         "rxsubchans=%d, audmode=%d\n",
1665                                         p->index, p->name, p->type,
1666                                         p->capability, p->rangelow,
1667                                         p->rangehigh, p->rxsubchans,
1668                                         p->audmode, p->signal, p->afc);
1669                 break;
1670         }
1671         case VIDIOC_S_TUNER:
1672         {
1673                 struct v4l2_tuner *p=arg;
1674                 if (!vfd->vidioc_s_tuner)
1675                         break;
1676                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1677                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1678                                 "signal=%d, afc=%d, rxsubchans=%d, "
1679                                 "audmode=%d\n",p->index, p->name, p->type,
1680                                 p->capability, p->rangelow,p->rangehigh,
1681                                 p->rxsubchans, p->audmode, p->signal,
1682                                 p->afc);
1683                 ret=vfd->vidioc_s_tuner(file, fh, p);
1684                 break;
1685         }
1686         case VIDIOC_G_FREQUENCY:
1687         {
1688                 struct v4l2_frequency *p = arg;
1689
1690                 if (!vfd->vidioc_g_frequency)
1691                         break;
1692
1693                 memset(p->reserved, 0, sizeof(p->reserved));
1694
1695                 ret = vfd->vidioc_g_frequency(file, fh, p);
1696                 if (!ret)
1697                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1698                                         p->tuner, p->type, p->frequency);
1699                 break;
1700         }
1701         case VIDIOC_S_FREQUENCY:
1702         {
1703                 struct v4l2_frequency *p=arg;
1704                 if (!vfd->vidioc_s_frequency)
1705                         break;
1706                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1707                                 p->tuner,p->type,p->frequency);
1708                 ret=vfd->vidioc_s_frequency(file, fh, p);
1709                 break;
1710         }
1711         case VIDIOC_G_SLICED_VBI_CAP:
1712         {
1713                 struct v4l2_sliced_vbi_cap *p=arg;
1714                 if (!vfd->vidioc_g_sliced_vbi_cap)
1715                         break;
1716                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1717                 if (!ret)
1718                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1719                 break;
1720         }
1721         case VIDIOC_LOG_STATUS:
1722         {
1723                 if (!vfd->vidioc_log_status)
1724                         break;
1725                 ret=vfd->vidioc_log_status(file, fh);
1726                 break;
1727         }
1728 #ifdef CONFIG_VIDEO_ADV_DEBUG
1729         case VIDIOC_DBG_G_REGISTER:
1730         {
1731                 struct v4l2_register *p=arg;
1732                 if (!capable(CAP_SYS_ADMIN))
1733                         ret=-EPERM;
1734                 else if (vfd->vidioc_g_register)
1735                         ret=vfd->vidioc_g_register(file, fh, p);
1736                 break;
1737         }
1738         case VIDIOC_DBG_S_REGISTER:
1739         {
1740                 struct v4l2_register *p=arg;
1741                 if (!capable(CAP_SYS_ADMIN))
1742                         ret=-EPERM;
1743                 else if (vfd->vidioc_s_register)
1744                         ret=vfd->vidioc_s_register(file, fh, p);
1745                 break;
1746         }
1747 #endif
1748         case VIDIOC_G_CHIP_IDENT:
1749         {
1750                 struct v4l2_chip_ident *p=arg;
1751                 if (!vfd->vidioc_g_chip_ident)
1752                         break;
1753                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1754                 if (!ret)
1755                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1756                 break;
1757         }
1758         default:
1759         {
1760                 if (!vfd->vidioc_default)
1761                         break;
1762                 ret = vfd->vidioc_default(file, fh, cmd, arg);
1763                 break;
1764         }
1765         case VIDIOC_S_HW_FREQ_SEEK:
1766         {
1767                 struct v4l2_hw_freq_seek *p = arg;
1768                 if (!vfd->vidioc_s_hw_freq_seek)
1769                         break;
1770                 dbgarg(cmd,
1771                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1772                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1773                 ret = vfd->vidioc_s_hw_freq_seek(file, fh, p);
1774                 break;
1775         }
1776         } /* switch */
1777
1778         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1779                 if (ret<0) {
1780                         printk("%s: err: on ", vfd->name);
1781                         v4l_print_ioctl(vfd->name, cmd);
1782                         printk("\n");
1783                 }
1784         }
1785
1786         return ret;
1787 }
1788
1789 int video_ioctl2 (struct inode *inode, struct file *file,
1790                unsigned int cmd, unsigned long arg)
1791 {
1792         char    sbuf[128];
1793         void    *mbuf = NULL;
1794         void    *parg = NULL;
1795         int     err  = -EINVAL;
1796         int     is_ext_ctrl;
1797         size_t  ctrls_size = 0;
1798         void __user *user_ptr = NULL;
1799
1800 #ifdef __OLD_VIDIOC_
1801         cmd = video_fix_command(cmd);
1802 #endif
1803         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1804                        cmd == VIDIOC_TRY_EXT_CTRLS);
1805
1806         /*  Copy arguments into temp kernel buffer  */
1807         switch (_IOC_DIR(cmd)) {
1808         case _IOC_NONE:
1809                 parg = NULL;
1810                 break;
1811         case _IOC_READ:
1812         case _IOC_WRITE:
1813         case (_IOC_WRITE | _IOC_READ):
1814                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1815                         parg = sbuf;
1816                 } else {
1817                         /* too big to allocate from stack */
1818                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1819                         if (NULL == mbuf)
1820                                 return -ENOMEM;
1821                         parg = mbuf;
1822                 }
1823
1824                 err = -EFAULT;
1825                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1826                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1827                                 goto out;
1828                 break;
1829         }
1830
1831         if (is_ext_ctrl) {
1832                 struct v4l2_ext_controls *p = parg;
1833
1834                 /* In case of an error, tell the caller that it wasn't
1835                    a specific control that caused it. */
1836                 p->error_idx = p->count;
1837                 user_ptr = (void __user *)p->controls;
1838                 if (p->count) {
1839                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1840                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1841                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1842                         err = -ENOMEM;
1843                         if (NULL == mbuf)
1844                                 goto out_ext_ctrl;
1845                         err = -EFAULT;
1846                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1847                                 goto out_ext_ctrl;
1848                         p->controls = mbuf;
1849                 }
1850         }
1851
1852         /* Handles IOCTL */
1853         err = __video_do_ioctl(inode, file, cmd, parg);
1854         if (err == -ENOIOCTLCMD)
1855                 err = -EINVAL;
1856         if (is_ext_ctrl) {
1857                 struct v4l2_ext_controls *p = parg;
1858
1859                 p->controls = (void *)user_ptr;
1860                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1861                         err = -EFAULT;
1862                 goto out_ext_ctrl;
1863         }
1864         if (err < 0)
1865                 goto out;
1866
1867 out_ext_ctrl:
1868         /*  Copy results into user buffer  */
1869         switch (_IOC_DIR(cmd))
1870         {
1871         case _IOC_READ:
1872         case (_IOC_WRITE | _IOC_READ):
1873                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1874                         err = -EFAULT;
1875                 break;
1876         }
1877
1878 out:
1879         kfree(mbuf);
1880         return err;
1881 }
1882 EXPORT_SYMBOL(video_ioctl2);
1883
1884 static const struct file_operations video_fops;
1885
1886 /**
1887  *      video_register_device - register video4linux devices
1888  *      @vfd:  video device structure we want to register
1889  *      @type: type of device to register
1890  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1891  *             -1 == first free)
1892  *
1893  *      The registration code assigns minor numbers based on the type
1894  *      requested. -ENFILE is returned in all the device slots for this
1895  *      category are full. If not then the minor field is set and the
1896  *      driver initialize function is called (if non %NULL).
1897  *
1898  *      Zero is returned on success.
1899  *
1900  *      Valid types are
1901  *
1902  *      %VFL_TYPE_GRABBER - A frame grabber
1903  *
1904  *      %VFL_TYPE_VTX - A teletext device
1905  *
1906  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1907  *
1908  *      %VFL_TYPE_RADIO - A radio card
1909  */
1910
1911 int video_register_device(struct video_device *vfd, int type, int nr)
1912 {
1913         int i=0;
1914         int base;
1915         int end;
1916         int ret;
1917         char *name_base;
1918
1919         switch(type)
1920         {
1921                 case VFL_TYPE_GRABBER:
1922                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1923                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1924                         name_base = "video";
1925                         break;
1926                 case VFL_TYPE_VTX:
1927                         base=MINOR_VFL_TYPE_VTX_MIN;
1928                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1929                         name_base = "vtx";
1930                         break;
1931                 case VFL_TYPE_VBI:
1932                         base=MINOR_VFL_TYPE_VBI_MIN;
1933                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1934                         name_base = "vbi";
1935                         break;
1936                 case VFL_TYPE_RADIO:
1937                         base=MINOR_VFL_TYPE_RADIO_MIN;
1938                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1939                         name_base = "radio";
1940                         break;
1941                 default:
1942                         printk(KERN_ERR "%s called with unknown type: %d\n",
1943                                __func__, type);
1944                         return -1;
1945         }
1946
1947         /* pick a minor number */
1948         mutex_lock(&videodev_lock);
1949         if (nr >= 0  &&  nr < end-base) {
1950                 /* use the one the driver asked for */
1951                 i = base+nr;
1952                 if (NULL != video_device[i]) {
1953                         mutex_unlock(&videodev_lock);
1954                         return -ENFILE;
1955                 }
1956         } else {
1957                 /* use first free */
1958                 for(i=base;i<end;i++)
1959                         if (NULL == video_device[i])
1960                                 break;
1961                 if (i == end) {
1962                         mutex_unlock(&videodev_lock);
1963                         return -ENFILE;
1964                 }
1965         }
1966         video_device[i]=vfd;
1967         vfd->minor=i;
1968         mutex_unlock(&videodev_lock);
1969         mutex_init(&vfd->lock);
1970
1971         /* sysfs class */
1972         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1973         if (vfd->dev)
1974                 vfd->class_dev.parent = vfd->dev;
1975         vfd->class_dev.class       = &video_class;
1976         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1977         sprintf(vfd->class_dev.bus_id, "%s%d", name_base, i - base);
1978         ret = device_register(&vfd->class_dev);
1979         if (ret < 0) {
1980                 printk(KERN_ERR "%s: device_register failed\n",
1981                        __func__);
1982                 goto fail_minor;
1983         }
1984
1985 #if 1
1986         /* needed until all drivers are fixed */
1987         if (!vfd->release)
1988                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1989                        "Please fix your driver for proper sysfs support, see "
1990                        "http://lwn.net/Articles/36850/\n", vfd->name);
1991 #endif
1992         return 0;
1993
1994 fail_minor:
1995         mutex_lock(&videodev_lock);
1996         video_device[vfd->minor] = NULL;
1997         vfd->minor = -1;
1998         mutex_unlock(&videodev_lock);
1999         return ret;
2000 }
2001 EXPORT_SYMBOL(video_register_device);
2002
2003 /**
2004  *      video_unregister_device - unregister a video4linux device
2005  *      @vfd: the device to unregister
2006  *
2007  *      This unregisters the passed device and deassigns the minor
2008  *      number. Future open calls will be met with errors.
2009  */
2010
2011 void video_unregister_device(struct video_device *vfd)
2012 {
2013         mutex_lock(&videodev_lock);
2014         if(video_device[vfd->minor]!=vfd)
2015                 panic("videodev: bad unregister");
2016
2017         video_device[vfd->minor]=NULL;
2018         device_unregister(&vfd->class_dev);
2019         mutex_unlock(&videodev_lock);
2020 }
2021 EXPORT_SYMBOL(video_unregister_device);
2022
2023 /*
2024  * Video fs operations
2025  */
2026 static const struct file_operations video_fops=
2027 {
2028         .owner          = THIS_MODULE,
2029         .llseek         = no_llseek,
2030         .open           = video_open,
2031 };
2032
2033 /*
2034  *      Initialise video for linux
2035  */
2036
2037 static int __init videodev_init(void)
2038 {
2039         int ret;
2040
2041         printk(KERN_INFO "Linux video capture interface: v2.00\n");
2042         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
2043                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
2044                 return -EIO;
2045         }
2046
2047         ret = class_register(&video_class);
2048         if (ret < 0) {
2049                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2050                 printk(KERN_WARNING "video_dev: class_register failed\n");
2051                 return -EIO;
2052         }
2053
2054         return 0;
2055 }
2056
2057 static void __exit videodev_exit(void)
2058 {
2059         class_unregister(&video_class);
2060         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2061 }
2062
2063 module_init(videodev_init)
2064 module_exit(videodev_exit)
2065
2066 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
2067 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
2068 MODULE_LICENSE("GPL");
2069
2070
2071 /*
2072  * Local variables:
2073  * c-basic-offset: 8
2074  * End:
2075  */