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_vid_cap)
 687                         return (0);
 688                 break;
 689         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 690                 if (vfd->vidioc_try_fmt_vid_overlay)
 691                         return (0);
 692                 break;
 693         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 694                 if (vfd->vidioc_try_fmt_vid_out)
 695                         return (0);
 696                 break;
 697         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 698                 if (vfd->vidioc_try_fmt_vid_out_overlay)
 699                         return (0);
 700                 break;
 701         case V4L2_BUF_TYPE_VBI_CAPTURE:
 702                 if (vfd->vidioc_try_fmt_vbi_cap)
 703                         return (0);
 704                 break;
 705         case V4L2_BUF_TYPE_VBI_OUTPUT:
 706                 if (vfd->vidioc_try_fmt_vbi_out)
 707                         return (0);
 708                 break;
 709         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 710                 if (vfd->vidioc_try_fmt_sliced_vbi_cap)
 711                         return (0);
 712                 break;
 713         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 714                 if (vfd->vidioc_try_fmt_sliced_vbi_out)
 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_vid_cap)
 832                                 ret = vfd->vidioc_enum_fmt_vid_cap(file, fh, f);
 833                         break;
 834                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 835                         if (vfd->vidioc_enum_fmt_vid_overlay)
 836                                 ret = vfd->vidioc_enum_fmt_vid_overlay(file,
 837                                         fh, f);
 838                         break;
 839 #if 1
 840                 /* V4L2_BUF_TYPE_VBI_CAPTURE should not support VIDIOC_ENUM_FMT
 841                  * according to the spec. The bttv and saa7134 drivers support
 842                  * it though, so just warn that this is deprecated and will be
 843                  * removed in the near future. */
 844                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 845                         if (vfd->vidioc_enum_fmt_vbi_cap) {
 846                                 printk(KERN_WARNING "vidioc_enum_fmt_vbi_cap will be removed in 2.6.28!\n");
 847                                 ret = vfd->vidioc_enum_fmt_vbi_cap(file, fh, f);
 848                         }
 849                         break;
 850 #endif
 851                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 852                         if (vfd->vidioc_enum_fmt_vid_out)
 853                                 ret = vfd->vidioc_enum_fmt_vid_out(file, fh, f);
 854                         break;
 855                 case V4L2_BUF_TYPE_PRIVATE:
 856                         if (vfd->vidioc_enum_fmt_type_private)
 857                                 ret = vfd->vidioc_enum_fmt_type_private(file,
 858                                                                 fh, f);
 859                         break;
 860                 default:
 861                         break;
 862                 }
 863                 if (!ret)
 864                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 865                                         "pixelformat=%c%c%c%c, description='%s'\n",
 866                                         f->index, f->type, f->flags,
 867                                         (f->pixelformat & 0xff),
 868                                         (f->pixelformat >>  8) & 0xff,
 869                                         (f->pixelformat >> 16) & 0xff,
 870                                         (f->pixelformat >> 24) & 0xff,
 871                                         f->description);
 872                 break;
 873         }
 874         case VIDIOC_G_FMT:
 875         {
 876                 struct v4l2_format *f = (struct v4l2_format *)arg;
 877
 878                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
 879
 880                 /* FIXME: Should be one dump per type */
 881                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 882
 883                 switch (f->type) {
 884                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 885                         if (vfd->vidioc_g_fmt_vid_cap)
 886                                 ret = vfd->vidioc_g_fmt_vid_cap(file, fh, f);
 887                         if (!ret)
 888                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 889                         break;
 890                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 891                         if (vfd->vidioc_g_fmt_vid_overlay)
 892                                 ret = vfd->vidioc_g_fmt_vid_overlay(file,
 893                                                                     fh, f);
 894                         break;
 895                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 896                         if (vfd->vidioc_g_fmt_vid_out)
 897                                 ret = vfd->vidioc_g_fmt_vid_out(file, fh, f);
 898                         break;
 899                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 900                         if (vfd->vidioc_g_fmt_vid_out_overlay)
 901                                 ret = vfd->vidioc_g_fmt_vid_out_overlay(file,
 902                                        fh, f);
 903                         break;
 904                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 905                         if (vfd->vidioc_g_fmt_vbi_cap)
 906                                 ret = vfd->vidioc_g_fmt_vbi_cap(file, fh, f);
 907                         break;
 908                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 909                         if (vfd->vidioc_g_fmt_vbi_out)
 910                                 ret = vfd->vidioc_g_fmt_vbi_out(file, fh, f);
 911                         break;
 912                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 913                         if (vfd->vidioc_g_fmt_sliced_vbi_cap)
 914                                 ret = vfd->vidioc_g_fmt_sliced_vbi_cap(file,
 915                                                                         fh, f);
 916                         break;
 917                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 918                         if (vfd->vidioc_g_fmt_sliced_vbi_out)
 919                                 ret = vfd->vidioc_g_fmt_sliced_vbi_out(file,
 920                                                                         fh, f);
 921                         break;
 922                 case V4L2_BUF_TYPE_PRIVATE:
 923                         if (vfd->vidioc_g_fmt_type_private)
 924                                 ret = vfd->vidioc_g_fmt_type_private(file,
 925                                                                 fh, f);
 926                         break;
 927                 }
 928
 929                 break;
 930         }
 931         case VIDIOC_S_FMT:
 932         {
 933                 struct v4l2_format *f = (struct v4l2_format *)arg;
 934
 935                 /* FIXME: Should be one dump per type */
 936                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 937                                         v4l2_type_names));
 938
 939                 switch (f->type) {
 940                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 941                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
 942                         if (vfd->vidioc_s_fmt_vid_cap)
 943                                 ret = vfd->vidioc_s_fmt_vid_cap(file, fh, f);
 944                         break;
 945                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 946                         if (vfd->vidioc_s_fmt_vid_overlay)
 947                                 ret = vfd->vidioc_s_fmt_vid_overlay(file,
 948                                                                     fh, f);
 949                         break;
 950                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 951                         if (vfd->vidioc_s_fmt_vid_out)
 952                                 ret = vfd->vidioc_s_fmt_vid_out(file, fh, f);
 953                         break;
 954                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 955                         if (vfd->vidioc_s_fmt_vid_out_overlay)
 956                                 ret = vfd->vidioc_s_fmt_vid_out_overlay(file,
 957                                         fh, f);
 958                         break;
 959                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 960                         if (vfd->vidioc_s_fmt_vbi_cap)
 961                                 ret = vfd->vidioc_s_fmt_vbi_cap(file, fh, f);
 962                         break;
 963                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 964                         if (vfd->vidioc_s_fmt_vbi_out)
 965                                 ret = vfd->vidioc_s_fmt_vbi_out(file, fh, f);
 966                         break;
 967                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 968                         if (vfd->vidioc_s_fmt_sliced_vbi_cap)
 969                                 ret = vfd->vidioc_s_fmt_sliced_vbi_cap(file,
 970                                                                         fh, f);
 971                         break;
 972                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 973                         if (vfd->vidioc_s_fmt_sliced_vbi_out)
 974                                 ret = vfd->vidioc_s_fmt_sliced_vbi_out(file,
 975                                                                         fh, f);
 976                         break;
 977                 case V4L2_BUF_TYPE_PRIVATE:
 978                         if (vfd->vidioc_s_fmt_type_private)
 979                                 ret = vfd->vidioc_s_fmt_type_private(file,
 980                                                                 fh, f);
 981                         break;
 982                 }
 983                 break;
 984         }
 985         case VIDIOC_TRY_FMT:
 986         {
 987                 struct v4l2_format *f = (struct v4l2_format *)arg;
 988
 989                 /* FIXME: Should be one dump per type */
 990                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
 991                                                 v4l2_type_names));
 992                 switch (f->type) {
 993                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 994                         if (vfd->vidioc_try_fmt_vid_cap)
 995                                 ret = vfd->vidioc_try_fmt_vid_cap(file, fh, f);
 996                         if (!ret)
 997                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
 998                         break;
 999                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1000                         if (vfd->vidioc_try_fmt_vid_overlay)
1001                                 ret = vfd->vidioc_try_fmt_vid_overlay(file,
1002                                         fh, f);
1003                         break;
1004                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1005                         if (vfd->vidioc_try_fmt_vid_out)
1006                                 ret = vfd->vidioc_try_fmt_vid_out(file, fh, f);
1007                         break;
1008                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1009                         if (vfd->vidioc_try_fmt_vid_out_overlay)
1010                                 ret = vfd->vidioc_try_fmt_vid_out_overlay(file,
1011                                        fh, f);
1012                         break;
1013                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1014                         if (vfd->vidioc_try_fmt_vbi_cap)
1015                                 ret = vfd->vidioc_try_fmt_vbi_cap(file, fh, f);
1016                         break;
1017                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1018                         if (vfd->vidioc_try_fmt_vbi_out)
1019                                 ret = vfd->vidioc_try_fmt_vbi_out(file, fh, f);
1020                         break;
1021                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1022                         if (vfd->vidioc_try_fmt_sliced_vbi_cap)
1023                                 ret = vfd->vidioc_try_fmt_sliced_vbi_cap(file,
1024                                                                 fh, f);
1025                         break;
1026                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1027                         if (vfd->vidioc_try_fmt_sliced_vbi_out)
1028                                 ret = vfd->vidioc_try_fmt_sliced_vbi_out(file,
1029                                                                 fh, f);
1030                         break;
1031                 case V4L2_BUF_TYPE_PRIVATE:
1032                         if (vfd->vidioc_try_fmt_type_private)
1033                                 ret = vfd->vidioc_try_fmt_type_private(file,
1034                                                                 fh, f);
1035                         break;
1036                 }
1037
1038                 break;
1039         }
1040         /* FIXME: Those buf reqs could be handled here,
1041            with some changes on videobuf to allow its header to be included at
1042            videodev2.h or being merged at videodev2.
1043          */
1044         case VIDIOC_REQBUFS:
1045         {
1046                 struct v4l2_requestbuffers *p=arg;
1047
1048                 if (!vfd->vidioc_reqbufs)
1049                         break;
1050                 ret = check_fmt (vfd, p->type);
1051                 if (ret)
1052                         break;
1053
1054                 ret=vfd->vidioc_reqbufs(file, fh, p);
1055                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
1056                                 p->count,
1057                                 prt_names(p->type, v4l2_type_names),
1058                                 prt_names(p->memory, v4l2_memory_names));
1059                 break;
1060         }
1061         case VIDIOC_QUERYBUF:
1062         {
1063                 struct v4l2_buffer *p=arg;
1064
1065                 if (!vfd->vidioc_querybuf)
1066                         break;
1067                 ret = check_fmt (vfd, p->type);
1068                 if (ret)
1069                         break;
1070
1071                 ret=vfd->vidioc_querybuf(file, fh, p);
1072                 if (!ret)
1073                         dbgbuf(cmd,vfd,p);
1074                 break;
1075         }
1076         case VIDIOC_QBUF:
1077         {
1078                 struct v4l2_buffer *p=arg;
1079
1080                 if (!vfd->vidioc_qbuf)
1081                         break;
1082                 ret = check_fmt (vfd, p->type);
1083                 if (ret)
1084                         break;
1085
1086                 ret=vfd->vidioc_qbuf(file, fh, p);
1087                 if (!ret)
1088                         dbgbuf(cmd,vfd,p);
1089                 break;
1090         }
1091         case VIDIOC_DQBUF:
1092         {
1093                 struct v4l2_buffer *p=arg;
1094                 if (!vfd->vidioc_dqbuf)
1095                         break;
1096                 ret = check_fmt (vfd, p->type);
1097                 if (ret)
1098                         break;
1099
1100                 ret=vfd->vidioc_dqbuf(file, fh, p);
1101                 if (!ret)
1102                         dbgbuf(cmd,vfd,p);
1103                 break;
1104         }
1105         case VIDIOC_OVERLAY:
1106         {
1107                 int *i = arg;
1108
1109                 if (!vfd->vidioc_overlay)
1110                         break;
1111                 dbgarg (cmd, "value=%d\n",*i);
1112                 ret=vfd->vidioc_overlay(file, fh, *i);
1113                 break;
1114         }
1115         case VIDIOC_G_FBUF:
1116         {
1117                 struct v4l2_framebuffer *p=arg;
1118                 if (!vfd->vidioc_g_fbuf)
1119                         break;
1120                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
1121                 if (!ret) {
1122                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
1123                                         p->capability,p->flags,
1124                                         (unsigned long)p->base);
1125                         v4l_print_pix_fmt (vfd, &p->fmt);
1126                 }
1127                 break;
1128         }
1129         case VIDIOC_S_FBUF:
1130         {
1131                 struct v4l2_framebuffer *p=arg;
1132                 if (!vfd->vidioc_s_fbuf)
1133                         break;
1134
1135                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
1136                                 p->capability,p->flags,(unsigned long)p->base);
1137                 v4l_print_pix_fmt (vfd, &p->fmt);
1138                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
1139
1140                 break;
1141         }
1142         case VIDIOC_STREAMON:
1143         {
1144                 enum v4l2_buf_type i = *(int *)arg;
1145                 if (!vfd->vidioc_streamon)
1146                         break;
1147                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1148                 ret=vfd->vidioc_streamon(file, fh,i);
1149                 break;
1150         }
1151         case VIDIOC_STREAMOFF:
1152         {
1153                 enum v4l2_buf_type i = *(int *)arg;
1154
1155                 if (!vfd->vidioc_streamoff)
1156                         break;
1157                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1158                 ret=vfd->vidioc_streamoff(file, fh, i);
1159                 break;
1160         }
1161         /* ---------- tv norms ---------- */
1162         case VIDIOC_ENUMSTD:
1163         {
1164                 struct v4l2_standard *p = arg;
1165                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1166                 unsigned int index = p->index, i, j = 0;
1167                 const char *descr = "";
1168
1169                 /* Return norm array in a canonical way */
1170                 for (i = 0; i <= index && id; i++) {
1171                         /* last std value in the standards array is 0, so this
1172                            while always ends there since (id & 0) == 0. */
1173                         while ((id & standards[j].std) != standards[j].std)
1174                                 j++;
1175                         curr_id = standards[j].std;
1176                         descr = standards[j].descr;
1177                         j++;
1178                         if (curr_id == 0)
1179                                 break;
1180                         if (curr_id != V4L2_STD_PAL &&
1181                             curr_id != V4L2_STD_SECAM &&
1182                             curr_id != V4L2_STD_NTSC)
1183                                 id &= ~curr_id;
1184                 }
1185                 if (i <= index)
1186                         return -EINVAL;
1187
1188                 v4l2_video_std_construct(p, curr_id, descr);
1189                 p->index = index;
1190
1191                 dbgarg(cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
1192                                 "framelines=%d\n", p->index,
1193                                 (unsigned long long)p->id, p->name,
1194                                 p->frameperiod.numerator,
1195                                 p->frameperiod.denominator,
1196                                 p->framelines);
1197
1198                 ret = 0;
1199                 break;
1200         }
1201         case VIDIOC_G_STD:
1202         {
1203                 v4l2_std_id *id = arg;
1204
1205                 ret = 0;
1206                 /* Calls the specific handler */
1207                 if (vfd->vidioc_g_std)
1208                         ret = vfd->vidioc_g_std(file, fh, id);
1209                 else
1210                         *id = vfd->current_norm;
1211
1212                 if (!ret)
1213                         dbgarg(cmd, "value=%08Lx\n", (long long unsigned)*id);
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_ENUMOUTPUT:
1297         {
1298                 struct v4l2_output *p = arg;
1299                 int i = p->index;
1300
1301                 if (!vfd->vidioc_enum_output)
1302                         break;
1303                 memset(p, 0, sizeof(*p));
1304                 p->index = i;
1305
1306                 ret = vfd->vidioc_enum_output(file, fh, p);
1307                 if (!ret)
1308                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1309                                 "audioset=%d, "
1310                                 "modulator=%d, std=%08Lx\n",
1311                                 p->index, p->name, p->type, p->audioset,
1312                                 p->modulator, (unsigned long long)p->std);
1313                 break;
1314         }
1315         case VIDIOC_G_OUTPUT:
1316         {
1317                 unsigned int *i = arg;
1318
1319                 if (!vfd->vidioc_g_output)
1320                         break;
1321                 ret=vfd->vidioc_g_output(file, fh, i);
1322                 if (!ret)
1323                         dbgarg (cmd, "value=%d\n",*i);
1324                 break;
1325         }
1326         case VIDIOC_S_OUTPUT:
1327         {
1328                 unsigned int *i = arg;
1329
1330                 if (!vfd->vidioc_s_output)
1331                         break;
1332                 dbgarg (cmd, "value=%d\n",*i);
1333                 ret=vfd->vidioc_s_output(file, fh, *i);
1334                 break;
1335         }
1336
1337         /* --- controls ---------------------------------------------- */
1338         case VIDIOC_QUERYCTRL:
1339         {
1340                 struct v4l2_queryctrl *p=arg;
1341
1342                 if (!vfd->vidioc_queryctrl)
1343                         break;
1344                 ret=vfd->vidioc_queryctrl(file, fh, p);
1345
1346                 if (!ret)
1347                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
1348                                         "min/max=%d/%d,"
1349                                         " step=%d, default=%d, flags=0x%08x\n",
1350                                         p->id,p->type,p->name,p->minimum,
1351                                         p->maximum,p->step,p->default_value,
1352                                         p->flags);
1353                 break;
1354         }
1355         case VIDIOC_G_CTRL:
1356         {
1357                 struct v4l2_control *p = arg;
1358
1359                 if (!vfd->vidioc_g_ctrl)
1360                         break;
1361                 dbgarg(cmd, "Enum for index=%d\n", p->id);
1362
1363                 ret=vfd->vidioc_g_ctrl(file, fh, p);
1364                 if (!ret)
1365                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
1366                 break;
1367         }
1368         case VIDIOC_S_CTRL:
1369         {
1370                 struct v4l2_control *p = arg;
1371
1372                 if (!vfd->vidioc_s_ctrl)
1373                         break;
1374                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
1375
1376                 ret=vfd->vidioc_s_ctrl(file, fh, p);
1377                 break;
1378         }
1379         case VIDIOC_G_EXT_CTRLS:
1380         {
1381                 struct v4l2_ext_controls *p = arg;
1382
1383                 if (vfd->vidioc_g_ext_ctrls) {
1384                         dbgarg(cmd, "count=%d\n", p->count);
1385
1386                         ret=vfd->vidioc_g_ext_ctrls(file, fh, p);
1387                 }
1388                 break;
1389         }
1390         case VIDIOC_S_EXT_CTRLS:
1391         {
1392                 struct v4l2_ext_controls *p = arg;
1393
1394                 if (vfd->vidioc_s_ext_ctrls) {
1395                         dbgarg(cmd, "count=%d\n", p->count);
1396
1397                         ret=vfd->vidioc_s_ext_ctrls(file, fh, p);
1398                 }
1399                 break;
1400         }
1401         case VIDIOC_TRY_EXT_CTRLS:
1402         {
1403                 struct v4l2_ext_controls *p = arg;
1404
1405                 if (vfd->vidioc_try_ext_ctrls) {
1406                         dbgarg(cmd, "count=%d\n", p->count);
1407
1408                         ret=vfd->vidioc_try_ext_ctrls(file, fh, p);
1409                 }
1410                 break;
1411         }
1412         case VIDIOC_QUERYMENU:
1413         {
1414                 struct v4l2_querymenu *p=arg;
1415                 if (!vfd->vidioc_querymenu)
1416                         break;
1417                 ret=vfd->vidioc_querymenu(file, fh, p);
1418                 if (!ret)
1419                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1420                                                 p->id,p->index,p->name);
1421                 break;
1422         }
1423         /* --- audio ---------------------------------------------- */
1424         case VIDIOC_ENUMAUDIO:
1425         {
1426                 struct v4l2_audio *p=arg;
1427
1428                 if (!vfd->vidioc_enumaudio)
1429                         break;
1430                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1431                 ret=vfd->vidioc_enumaudio(file, fh, p);
1432                 if (!ret)
1433                         dbgarg2("index=%d, name=%s, capability=%d, "
1434                                         "mode=%d\n",p->index,p->name,
1435                                         p->capability, p->mode);
1436                 break;
1437         }
1438         case VIDIOC_G_AUDIO:
1439         {
1440                 struct v4l2_audio *p=arg;
1441                 __u32 index=p->index;
1442
1443                 if (!vfd->vidioc_g_audio)
1444                         break;
1445
1446                 memset(p,0,sizeof(*p));
1447                 p->index=index;
1448                 dbgarg(cmd, "Get for index=%d\n", p->index);
1449                 ret=vfd->vidioc_g_audio(file, fh, p);
1450                 if (!ret)
1451                         dbgarg2("index=%d, name=%s, capability=%d, "
1452                                         "mode=%d\n",p->index,
1453                                         p->name,p->capability, p->mode);
1454                 break;
1455         }
1456         case VIDIOC_S_AUDIO:
1457         {
1458                 struct v4l2_audio *p=arg;
1459
1460                 if (!vfd->vidioc_s_audio)
1461                         break;
1462                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1463                                         "mode=%d\n", p->index, p->name,
1464                                         p->capability, p->mode);
1465                 ret=vfd->vidioc_s_audio(file, fh, p);
1466                 break;
1467         }
1468         case VIDIOC_ENUMAUDOUT:
1469         {
1470                 struct v4l2_audioout *p=arg;
1471
1472                 if (!vfd->vidioc_enumaudout)
1473                         break;
1474                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1475                 ret=vfd->vidioc_enumaudout(file, fh, p);
1476                 if (!ret)
1477                         dbgarg2("index=%d, name=%s, capability=%d, "
1478                                         "mode=%d\n", p->index, p->name,
1479                                         p->capability,p->mode);
1480                 break;
1481         }
1482         case VIDIOC_G_AUDOUT:
1483         {
1484                 struct v4l2_audioout *p=arg;
1485
1486                 if (!vfd->vidioc_g_audout)
1487                         break;
1488                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1489                 ret=vfd->vidioc_g_audout(file, fh, p);
1490                 if (!ret)
1491                         dbgarg2("index=%d, name=%s, capability=%d, "
1492                                         "mode=%d\n", p->index, p->name,
1493                                         p->capability,p->mode);
1494                 break;
1495         }
1496         case VIDIOC_S_AUDOUT:
1497         {
1498                 struct v4l2_audioout *p=arg;
1499
1500                 if (!vfd->vidioc_s_audout)
1501                         break;
1502                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1503                                         "mode=%d\n", p->index, p->name,
1504                                         p->capability,p->mode);
1505
1506                 ret=vfd->vidioc_s_audout(file, fh, p);
1507                 break;
1508         }
1509         case VIDIOC_G_MODULATOR:
1510         {
1511                 struct v4l2_modulator *p=arg;
1512                 if (!vfd->vidioc_g_modulator)
1513                         break;
1514                 ret=vfd->vidioc_g_modulator(file, fh, p);
1515                 if (!ret)
1516                         dbgarg(cmd, "index=%d, name=%s, "
1517                                         "capability=%d, rangelow=%d,"
1518                                         " rangehigh=%d, txsubchans=%d\n",
1519                                         p->index, p->name,p->capability,
1520                                         p->rangelow, p->rangehigh,
1521                                         p->txsubchans);
1522                 break;
1523         }
1524         case VIDIOC_S_MODULATOR:
1525         {
1526                 struct v4l2_modulator *p=arg;
1527                 if (!vfd->vidioc_s_modulator)
1528                         break;
1529                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1530                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1531                                 p->index, p->name,p->capability,p->rangelow,
1532                                 p->rangehigh,p->txsubchans);
1533                         ret=vfd->vidioc_s_modulator(file, fh, p);
1534                 break;
1535         }
1536         case VIDIOC_G_CROP:
1537         {
1538                 struct v4l2_crop *p=arg;
1539                 if (!vfd->vidioc_g_crop)
1540                         break;
1541                 ret=vfd->vidioc_g_crop(file, fh, p);
1542                 if (!ret) {
1543                         dbgarg(cmd, "type=%d\n", p->type);
1544                         dbgrect(vfd, "", &p->c);
1545                 }
1546                 break;
1547         }
1548         case VIDIOC_S_CROP:
1549         {
1550                 struct v4l2_crop *p=arg;
1551                 if (!vfd->vidioc_s_crop)
1552                         break;
1553                 dbgarg(cmd, "type=%d\n", p->type);
1554                 dbgrect(vfd, "", &p->c);
1555                 ret=vfd->vidioc_s_crop(file, fh, p);
1556                 break;
1557         }
1558         case VIDIOC_CROPCAP:
1559         {
1560                 struct v4l2_cropcap *p=arg;
1561                 /*FIXME: Should also show v4l2_fract pixelaspect */
1562                 if (!vfd->vidioc_cropcap)
1563                         break;
1564                 dbgarg(cmd, "type=%d\n", p->type);
1565                 dbgrect(vfd, "bounds ", &p->bounds);
1566                 dbgrect(vfd, "defrect ", &p->defrect);
1567                 ret=vfd->vidioc_cropcap(file, fh, p);
1568                 break;
1569         }
1570         case VIDIOC_G_JPEGCOMP:
1571         {
1572                 struct v4l2_jpegcompression *p=arg;
1573                 if (!vfd->vidioc_g_jpegcomp)
1574                         break;
1575                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1576                 if (!ret)
1577                         dbgarg (cmd, "quality=%d, APPn=%d, "
1578                                                 "APP_len=%d, COM_len=%d, "
1579                                                 "jpeg_markers=%d\n",
1580                                                 p->quality,p->APPn,p->APP_len,
1581                                                 p->COM_len,p->jpeg_markers);
1582                 break;
1583         }
1584         case VIDIOC_S_JPEGCOMP:
1585         {
1586                 struct v4l2_jpegcompression *p=arg;
1587                 if (!vfd->vidioc_g_jpegcomp)
1588                         break;
1589                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1590                                         "COM_len=%d, jpeg_markers=%d\n",
1591                                         p->quality,p->APPn,p->APP_len,
1592                                         p->COM_len,p->jpeg_markers);
1593                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1594                 break;
1595         }
1596         case VIDIOC_G_ENC_INDEX:
1597         {
1598                 struct v4l2_enc_idx *p=arg;
1599
1600                 if (!vfd->vidioc_g_enc_index)
1601                         break;
1602                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1603                 if (!ret)
1604                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1605                                         p->entries,p->entries_cap);
1606                 break;
1607         }
1608         case VIDIOC_ENCODER_CMD:
1609         {
1610                 struct v4l2_encoder_cmd *p=arg;
1611
1612                 if (!vfd->vidioc_encoder_cmd)
1613                         break;
1614                 ret=vfd->vidioc_encoder_cmd(file, fh, p);
1615                 if (!ret)
1616                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1617                                         p->cmd,p->flags);
1618                 break;
1619         }
1620         case VIDIOC_TRY_ENCODER_CMD:
1621         {
1622                 struct v4l2_encoder_cmd *p=arg;
1623
1624                 if (!vfd->vidioc_try_encoder_cmd)
1625                         break;
1626                 ret=vfd->vidioc_try_encoder_cmd(file, fh, p);
1627                 if (!ret)
1628                         dbgarg (cmd, "cmd=%d, flags=%d\n",
1629                                         p->cmd,p->flags);
1630                 break;
1631         }
1632         case VIDIOC_G_PARM:
1633         {
1634                 struct v4l2_streamparm *p=arg;
1635                 __u32 type=p->type;
1636
1637                 memset(p,0,sizeof(*p));
1638                 p->type=type;
1639
1640                 if (vfd->vidioc_g_parm) {
1641                         ret=vfd->vidioc_g_parm(file, fh, p);
1642                 } else {
1643                         struct v4l2_standard s;
1644
1645                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1646                                 return -EINVAL;
1647
1648                         v4l2_video_std_construct(&s, vfd->current_norm,
1649                                                  v4l2_norm_to_name(vfd->current_norm));
1650
1651                         p->parm.capture.timeperframe = s.frameperiod;
1652                         ret=0;
1653                 }
1654
1655                 dbgarg (cmd, "type=%d\n", p->type);
1656                 break;
1657         }
1658         case VIDIOC_S_PARM:
1659         {
1660                 struct v4l2_streamparm *p=arg;
1661                 if (!vfd->vidioc_s_parm)
1662                         break;
1663                 dbgarg (cmd, "type=%d\n", p->type);
1664                 ret=vfd->vidioc_s_parm(file, fh, p);
1665                 break;
1666         }
1667         case VIDIOC_G_TUNER:
1668         {
1669                 struct v4l2_tuner *p=arg;
1670                 __u32 index=p->index;
1671
1672                 if (!vfd->vidioc_g_tuner)
1673                         break;
1674
1675                 memset(p,0,sizeof(*p));
1676                 p->index=index;
1677
1678                 ret=vfd->vidioc_g_tuner(file, fh, p);
1679                 if (!ret)
1680                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1681                                         "capability=%d, rangelow=%d, "
1682                                         "rangehigh=%d, signal=%d, afc=%d, "
1683                                         "rxsubchans=%d, audmode=%d\n",
1684                                         p->index, p->name, p->type,
1685                                         p->capability, p->rangelow,
1686                                         p->rangehigh, p->rxsubchans,
1687                                         p->audmode, p->signal, p->afc);
1688                 break;
1689         }
1690         case VIDIOC_S_TUNER:
1691         {
1692                 struct v4l2_tuner *p=arg;
1693                 if (!vfd->vidioc_s_tuner)
1694                         break;
1695                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1696                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1697                                 "signal=%d, afc=%d, rxsubchans=%d, "
1698                                 "audmode=%d\n",p->index, p->name, p->type,
1699                                 p->capability, p->rangelow,p->rangehigh,
1700                                 p->rxsubchans, p->audmode, p->signal,
1701                                 p->afc);
1702                 ret=vfd->vidioc_s_tuner(file, fh, p);
1703                 break;
1704         }
1705         case VIDIOC_G_FREQUENCY:
1706         {
1707                 struct v4l2_frequency *p = arg;
1708
1709                 if (!vfd->vidioc_g_frequency)
1710                         break;
1711
1712                 memset(p->reserved, 0, sizeof(p->reserved));
1713
1714                 ret = vfd->vidioc_g_frequency(file, fh, p);
1715                 if (!ret)
1716                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1717                                         p->tuner, p->type, p->frequency);
1718                 break;
1719         }
1720         case VIDIOC_S_FREQUENCY:
1721         {
1722                 struct v4l2_frequency *p=arg;
1723                 if (!vfd->vidioc_s_frequency)
1724                         break;
1725                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1726                                 p->tuner,p->type,p->frequency);
1727                 ret=vfd->vidioc_s_frequency(file, fh, p);
1728                 break;
1729         }
1730         case VIDIOC_G_SLICED_VBI_CAP:
1731         {
1732                 struct v4l2_sliced_vbi_cap *p=arg;
1733                 if (!vfd->vidioc_g_sliced_vbi_cap)
1734                         break;
1735                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1736                 if (!ret)
1737                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1738                 break;
1739         }
1740         case VIDIOC_LOG_STATUS:
1741         {
1742                 if (!vfd->vidioc_log_status)
1743                         break;
1744                 ret=vfd->vidioc_log_status(file, fh);
1745                 break;
1746         }
1747 #ifdef CONFIG_VIDEO_ADV_DEBUG
1748         case VIDIOC_DBG_G_REGISTER:
1749         {
1750                 struct v4l2_register *p=arg;
1751                 if (!capable(CAP_SYS_ADMIN))
1752                         ret=-EPERM;
1753                 else if (vfd->vidioc_g_register)
1754                         ret=vfd->vidioc_g_register(file, fh, p);
1755                 break;
1756         }
1757         case VIDIOC_DBG_S_REGISTER:
1758         {
1759                 struct v4l2_register *p=arg;
1760                 if (!capable(CAP_SYS_ADMIN))
1761                         ret=-EPERM;
1762                 else if (vfd->vidioc_s_register)
1763                         ret=vfd->vidioc_s_register(file, fh, p);
1764                 break;
1765         }
1766 #endif
1767         case VIDIOC_G_CHIP_IDENT:
1768         {
1769                 struct v4l2_chip_ident *p=arg;
1770                 if (!vfd->vidioc_g_chip_ident)
1771                         break;
1772                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1773                 if (!ret)
1774                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1775                 break;
1776         }
1777         default:
1778         {
1779                 if (!vfd->vidioc_default)
1780                         break;
1781                 ret = vfd->vidioc_default(file, fh, cmd, arg);
1782                 break;
1783         }
1784         case VIDIOC_S_HW_FREQ_SEEK:
1785         {
1786                 struct v4l2_hw_freq_seek *p = arg;
1787                 if (!vfd->vidioc_s_hw_freq_seek)
1788                         break;
1789                 dbgarg(cmd,
1790                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1791                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1792                 ret = vfd->vidioc_s_hw_freq_seek(file, fh, p);
1793                 break;
1794         }
1795         } /* switch */
1796
1797         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1798                 if (ret<0) {
1799                         printk("%s: err: on ", vfd->name);
1800                         v4l_print_ioctl(vfd->name, cmd);
1801                         printk("\n");
1802                 }
1803         }
1804
1805         return ret;
1806 }
1807
1808 int video_ioctl2 (struct inode *inode, struct file *file,
1809                unsigned int cmd, unsigned long arg)
1810 {
1811         char    sbuf[128];
1812         void    *mbuf = NULL;
1813         void    *parg = NULL;
1814         int     err  = -EINVAL;
1815         int     is_ext_ctrl;
1816         size_t  ctrls_size = 0;
1817         void __user *user_ptr = NULL;
1818
1819 #ifdef __OLD_VIDIOC_
1820         cmd = video_fix_command(cmd);
1821 #endif
1822         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1823                        cmd == VIDIOC_TRY_EXT_CTRLS);
1824
1825         /*  Copy arguments into temp kernel buffer  */
1826         switch (_IOC_DIR(cmd)) {
1827         case _IOC_NONE:
1828                 parg = NULL;
1829                 break;
1830         case _IOC_READ:
1831         case _IOC_WRITE:
1832         case (_IOC_WRITE | _IOC_READ):
1833                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1834                         parg = sbuf;
1835                 } else {
1836                         /* too big to allocate from stack */
1837                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1838                         if (NULL == mbuf)
1839                                 return -ENOMEM;
1840                         parg = mbuf;
1841                 }
1842
1843                 err = -EFAULT;
1844                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1845                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1846                                 goto out;
1847                 break;
1848         }
1849
1850         if (is_ext_ctrl) {
1851                 struct v4l2_ext_controls *p = parg;
1852
1853                 /* In case of an error, tell the caller that it wasn't
1854                    a specific control that caused it. */
1855                 p->error_idx = p->count;
1856                 user_ptr = (void __user *)p->controls;
1857                 if (p->count) {
1858                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1859                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1860                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1861                         err = -ENOMEM;
1862                         if (NULL == mbuf)
1863                                 goto out_ext_ctrl;
1864                         err = -EFAULT;
1865                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1866                                 goto out_ext_ctrl;
1867                         p->controls = mbuf;
1868                 }
1869         }
1870
1871         /* Handles IOCTL */
1872         err = __video_do_ioctl(inode, file, cmd, parg);
1873         if (err == -ENOIOCTLCMD)
1874                 err = -EINVAL;
1875         if (is_ext_ctrl) {
1876                 struct v4l2_ext_controls *p = parg;
1877
1878                 p->controls = (void *)user_ptr;
1879                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1880                         err = -EFAULT;
1881                 goto out_ext_ctrl;
1882         }
1883         if (err < 0)
1884                 goto out;
1885
1886 out_ext_ctrl:
1887         /*  Copy results into user buffer  */
1888         switch (_IOC_DIR(cmd))
1889         {
1890         case _IOC_READ:
1891         case (_IOC_WRITE | _IOC_READ):
1892                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1893                         err = -EFAULT;
1894                 break;
1895         }
1896
1897 out:
1898         kfree(mbuf);
1899         return err;
1900 }
1901 EXPORT_SYMBOL(video_ioctl2);
1902
1903 static const struct file_operations video_fops;
1904
1905 /**
1906  *      video_register_device - register video4linux devices
1907  *      @vfd:  video device structure we want to register
1908  *      @type: type of device to register
1909  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1910  *             -1 == first free)
1911  *
1912  *      The registration code assigns minor numbers based on the type
1913  *      requested. -ENFILE is returned in all the device slots for this
1914  *      category are full. If not then the minor field is set and the
1915  *      driver initialize function is called (if non %NULL).
1916  *
1917  *      Zero is returned on success.
1918  *
1919  *      Valid types are
1920  *
1921  *      %VFL_TYPE_GRABBER - A frame grabber
1922  *
1923  *      %VFL_TYPE_VTX - A teletext device
1924  *
1925  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1926  *
1927  *      %VFL_TYPE_RADIO - A radio card
1928  */
1929
1930 int video_register_device(struct video_device *vfd, int type, int nr)
1931 {
1932         int i=0;
1933         int base;
1934         int end;
1935         int ret;
1936         char *name_base;
1937
1938         switch(type)
1939         {
1940                 case VFL_TYPE_GRABBER:
1941                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1942                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1943                         name_base = "video";
1944                         break;
1945                 case VFL_TYPE_VTX:
1946                         base=MINOR_VFL_TYPE_VTX_MIN;
1947                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1948                         name_base = "vtx";
1949                         break;
1950                 case VFL_TYPE_VBI:
1951                         base=MINOR_VFL_TYPE_VBI_MIN;
1952                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1953                         name_base = "vbi";
1954                         break;
1955                 case VFL_TYPE_RADIO:
1956                         base=MINOR_VFL_TYPE_RADIO_MIN;
1957                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1958                         name_base = "radio";
1959                         break;
1960                 default:
1961                         printk(KERN_ERR "%s called with unknown type: %d\n",
1962                                __func__, type);
1963                         return -1;
1964         }
1965
1966         /* pick a minor number */
1967         mutex_lock(&videodev_lock);
1968         if (nr >= 0  &&  nr < end-base) {
1969                 /* use the one the driver asked for */
1970                 i = base+nr;
1971                 if (NULL != video_device[i]) {
1972                         mutex_unlock(&videodev_lock);
1973                         return -ENFILE;
1974                 }
1975         } else {
1976                 /* use first free */
1977                 for(i=base;i<end;i++)
1978                         if (NULL == video_device[i])
1979                                 break;
1980                 if (i == end) {
1981                         mutex_unlock(&videodev_lock);
1982                         return -ENFILE;
1983                 }
1984         }
1985         video_device[i]=vfd;
1986         vfd->minor=i;
1987         mutex_unlock(&videodev_lock);
1988         mutex_init(&vfd->lock);
1989
1990         /* sysfs class */
1991         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1992         if (vfd->dev)
1993                 vfd->class_dev.parent = vfd->dev;
1994         vfd->class_dev.class       = &video_class;
1995         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1996         sprintf(vfd->class_dev.bus_id, "%s%d", name_base, i - base);
1997         ret = device_register(&vfd->class_dev);
1998         if (ret < 0) {
1999                 printk(KERN_ERR "%s: device_register failed\n",
2000                        __func__);
2001                 goto fail_minor;
2002         }
2003
2004 #if 1
2005         /* needed until all drivers are fixed */
2006         if (!vfd->release)
2007                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
2008                        "Please fix your driver for proper sysfs support, see "
2009                        "http://lwn.net/Articles/36850/\n", vfd->name);
2010 #endif
2011         return 0;
2012
2013 fail_minor:
2014         mutex_lock(&videodev_lock);
2015         video_device[vfd->minor] = NULL;
2016         vfd->minor = -1;
2017         mutex_unlock(&videodev_lock);
2018         return ret;
2019 }
2020 EXPORT_SYMBOL(video_register_device);
2021
2022 /**
2023  *      video_unregister_device - unregister a video4linux device
2024  *      @vfd: the device to unregister
2025  *
2026  *      This unregisters the passed device and deassigns the minor
2027  *      number. Future open calls will be met with errors.
2028  */
2029
2030 void video_unregister_device(struct video_device *vfd)
2031 {
2032         mutex_lock(&videodev_lock);
2033         if(video_device[vfd->minor]!=vfd)
2034                 panic("videodev: bad unregister");
2035
2036         video_device[vfd->minor]=NULL;
2037         device_unregister(&vfd->class_dev);
2038         mutex_unlock(&videodev_lock);
2039 }
2040 EXPORT_SYMBOL(video_unregister_device);
2041
2042 /*
2043  * Video fs operations
2044  */
2045 static const struct file_operations video_fops=
2046 {
2047         .owner          = THIS_MODULE,
2048         .llseek         = no_llseek,
2049         .open           = video_open,
2050 };
2051
2052 /*
2053  *      Initialise video for linux
2054  */
2055
2056 static int __init videodev_init(void)
2057 {
2058         int ret;
2059
2060         printk(KERN_INFO "Linux video capture interface: v2.00\n");
2061         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
2062                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
2063                 return -EIO;
2064         }
2065
2066         ret = class_register(&video_class);
2067         if (ret < 0) {
2068                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2069                 printk(KERN_WARNING "video_dev: class_register failed\n");
2070                 return -EIO;
2071         }
2072
2073         return 0;
2074 }
2075
2076 static void __exit videodev_exit(void)
2077 {
2078         class_unregister(&video_class);
2079         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2080 }
2081
2082 module_init(videodev_init)
2083 module_exit(videodev_exit)
2084
2085 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
2086 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
2087 MODULE_LICENSE("GPL");
2088
2089
2090 /*
2091  * Local variables:
2092  * c-basic-offset: 8
2093  * End:
2094  */