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                 do {                                                    \
  21                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {            \
  22                         printk(KERN_DEBUG "%s: ",  vfd->name);          \
  23                         v4l_printk_ioctl(cmd);                          \
  24                         printk(" " fmt,  ## arg);                       \
  25                     }                                                   \
  26                 } while (0)
  27
  28 #define dbgarg2(fmt, arg...) \
  29                 do {                                                    \
  30                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  31                         printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
  32                 } while (0)
  33
  34 #include <linux/module.h>
  35 #include <linux/types.h>
  36 #include <linux/kernel.h>
  37 #include <linux/mm.h>
  38 #include <linux/string.h>
  39 #include <linux/errno.h>
  40 #include <linux/init.h>
  41 #include <linux/kmod.h>
  42 #include <linux/slab.h>
  43 #include <linux/smp_lock.h>
  44 #include <asm/uaccess.h>
  45 #include <asm/system.h>
  46
  47 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
  48 #include <linux/videodev2.h>
  49
  50 #ifdef CONFIG_VIDEO_V4L1
  51 #include <linux/videodev.h>
  52 #endif
  53 #include <media/v4l2-common.h>
  54 #include <linux/video_decoder.h>
  55
  56 #define VIDEO_NUM_DEVICES       256
  57 #define VIDEO_NAME              "video4linux"
  58
  59 struct std_descr {
  60         v4l2_std_id std;
  61         const char *descr;
  62 };
  63
  64 static const struct std_descr standards[] = {
  65         { V4L2_STD_NTSC,        "NTSC"      },
  66         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  67         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  68         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  69         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  70         { V4L2_STD_PAL,         "PAL"       },
  71         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  72         { V4L2_STD_PAL_B,       "PAL-B"     },
  73         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  74         { V4L2_STD_PAL_G,       "PAL-G"     },
  75         { V4L2_STD_PAL_H,       "PAL-H"     },
  76         { V4L2_STD_PAL_I,       "PAL-I"     },
  77         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  78         { V4L2_STD_PAL_D,       "PAL-D"     },
  79         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  80         { V4L2_STD_PAL_K,       "PAL-K"     },
  81         { V4L2_STD_PAL_M,       "PAL-M"     },
  82         { V4L2_STD_PAL_N,       "PAL-N"     },
  83         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  84         { V4L2_STD_PAL_60,      "PAL-60"    },
  85         { V4L2_STD_SECAM,       "SECAM"     },
  86         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  87         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  88         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  89         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  90         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  91         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  92         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  93         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  94         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  95         { 0,                    "Unknown"   }
  96 };
  97
  98 /* video4linux standard ID conversion to standard name
  99  */
 100 const char *v4l2_norm_to_name(v4l2_std_id id)
 101 {
 102         u32 myid = id;
 103         int i;
 104
 105         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
 106            64 bit comparations. So, on that architecture, with some gcc
 107            variants, compilation fails. Currently, the max value is 30bit wide.
 108          */
 109         BUG_ON(myid != id);
 110
 111         for (i = 0; standards[i].std; i++)
 112                 if (myid == standards[i].std)
 113                         break;
 114         return standards[i].descr;
 115 }
 116 EXPORT_SYMBOL(v4l2_norm_to_name);
 117
 118 /* Fill in the fields of a v4l2_standard structure according to the
 119    'id' and 'transmission' parameters.  Returns negative on error.  */
 120 int v4l2_video_std_construct(struct v4l2_standard *vs,
 121                              int id, const char *name)
 122 {
 123         u32 index = vs->index;
 124
 125         memset(vs, 0, sizeof(struct v4l2_standard));
 126         vs->index = index;
 127         vs->id    = id;
 128         if (id & V4L2_STD_525_60) {
 129                 vs->frameperiod.numerator = 1001;
 130                 vs->frameperiod.denominator = 30000;
 131                 vs->framelines = 525;
 132         } else {
 133                 vs->frameperiod.numerator = 1;
 134                 vs->frameperiod.denominator = 25;
 135                 vs->framelines = 625;
 136         }
 137         strlcpy(vs->name, name, sizeof(vs->name));
 138         return 0;
 139 }
 140 EXPORT_SYMBOL(v4l2_video_std_construct);
 141
 142 /* ----------------------------------------------------------------- */
 143 /* some arrays for pretty-printing debug messages of enum types      */
 144
 145 const char *v4l2_field_names[] = {
 146         [V4L2_FIELD_ANY]        = "any",
 147         [V4L2_FIELD_NONE]       = "none",
 148         [V4L2_FIELD_TOP]        = "top",
 149         [V4L2_FIELD_BOTTOM]     = "bottom",
 150         [V4L2_FIELD_INTERLACED] = "interlaced",
 151         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 152         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 153         [V4L2_FIELD_ALTERNATE]  = "alternate",
 154         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 155         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 156 };
 157 EXPORT_SYMBOL(v4l2_field_names);
 158
 159 const char *v4l2_type_names[] = {
 160         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 161         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 162         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 163         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 164         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 165         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 166         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 167         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 168 };
 169 EXPORT_SYMBOL(v4l2_type_names);
 170
 171 static const char *v4l2_memory_names[] = {
 172         [V4L2_MEMORY_MMAP]    = "mmap",
 173         [V4L2_MEMORY_USERPTR] = "userptr",
 174         [V4L2_MEMORY_OVERLAY] = "overlay",
 175 };
 176
 177 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 178                            arr[a] : "unknown")
 179
 180 /* ------------------------------------------------------------------ */
 181 /* debug help functions                                               */
 182
 183 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 184 static const char *v4l1_ioctls[] = {
 185         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
 186         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
 187         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
 188         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
 189         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
 190         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
 191         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
 192         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
 193         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
 194         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
 195         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
 196         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
 197         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
 198         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
 199         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
 200         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
 201         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
 202         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
 203         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
 204         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
 205         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
 206         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
 207         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
 208         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
 209         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
 210         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
 211         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
 212         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
 213         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
 214 };
 215 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
 216 #endif
 217
 218 static const char *v4l2_ioctls[] = {
 219         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 220         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 221         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 222         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 223         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 224         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 225         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 226         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 227         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 228         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 229         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 230         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 231         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 232         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 233         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 234         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 235         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 236         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 237         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 238         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 239         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 240         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 241         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 242         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 243         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 244         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 245         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 246         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 247         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 248         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 249         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 250         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 251         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 252         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 253         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 254         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 255         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 256         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 257         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 258         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 259         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 260         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 261         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 262         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 263         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 264         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 265         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 266         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 267         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 268         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 269         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 270         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 271         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 272         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 273         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 274 #if 1
 275         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 276         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 277         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 278         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 279         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 280
 281         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 282         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 283
 284         [_IOC_NR(VIDIOC_G_CHIP_IDENT)]     = "VIDIOC_G_CHIP_IDENT",
 285         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 286 #endif
 287 };
 288 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 289
 290 static const char *v4l2_int_ioctls[] = {
 291 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 292         [_IOC_NR(DECODER_GET_CAPABILITIES)]    = "DECODER_GET_CAPABILITIES",
 293         [_IOC_NR(DECODER_GET_STATUS)]          = "DECODER_GET_STATUS",
 294         [_IOC_NR(DECODER_SET_NORM)]            = "DECODER_SET_NORM",
 295         [_IOC_NR(DECODER_SET_INPUT)]           = "DECODER_SET_INPUT",
 296         [_IOC_NR(DECODER_SET_OUTPUT)]          = "DECODER_SET_OUTPUT",
 297         [_IOC_NR(DECODER_ENABLE_OUTPUT)]       = "DECODER_ENABLE_OUTPUT",
 298         [_IOC_NR(DECODER_SET_PICTURE)]         = "DECODER_SET_PICTURE",
 299         [_IOC_NR(DECODER_SET_GPIO)]            = "DECODER_SET_GPIO",
 300         [_IOC_NR(DECODER_INIT)]                = "DECODER_INIT",
 301         [_IOC_NR(DECODER_SET_VBI_BYPASS)]      = "DECODER_SET_VBI_BYPASS",
 302         [_IOC_NR(DECODER_DUMP)]                = "DECODER_DUMP",
 303 #endif
 304         [_IOC_NR(AUDC_SET_RADIO)]              = "AUDC_SET_RADIO",
 305
 306         [_IOC_NR(TUNER_SET_TYPE_ADDR)]         = "TUNER_SET_TYPE_ADDR",
 307         [_IOC_NR(TUNER_SET_STANDBY)]           = "TUNER_SET_STANDBY",
 308         [_IOC_NR(TUNER_SET_CONFIG)]            = "TUNER_SET_CONFIG",
 309
 310         [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)]     = "VIDIOC_INT_S_TUNER_MODE",
 311         [_IOC_NR(VIDIOC_INT_RESET)]            = "VIDIOC_INT_RESET",
 312         [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
 313         [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)]  = "VIDIOC_INT_DECODE_VBI_LINE",
 314         [_IOC_NR(VIDIOC_INT_S_VBI_DATA)]       = "VIDIOC_INT_S_VBI_DATA",
 315         [_IOC_NR(VIDIOC_INT_G_VBI_DATA)]       = "VIDIOC_INT_G_VBI_DATA",
 316         [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)]   = "VIDIOC_INT_I2S_CLOCK_FREQ",
 317         [_IOC_NR(VIDIOC_INT_S_STANDBY)]        = "VIDIOC_INT_S_STANDBY",
 318         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
 319         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
 320         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
 321         [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
 322         [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ",
 323         [_IOC_NR(VIDIOC_INT_INIT)]             = "VIDIOC_INT_INIT",
 324         [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)]     = "VIDIOC_INT_G_STD_OUTPUT",
 325         [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)]     = "VIDIOC_INT_S_STD_OUTPUT",
 326 };
 327 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 328
 329 /* Common ioctl debug function. This function can be used by
 330    external ioctl messages as well as internal V4L ioctl */
 331 void v4l_printk_ioctl(unsigned int cmd)
 332 {
 333         char *dir, *type;
 334
 335         switch (_IOC_TYPE(cmd)) {
 336         case 'd':
 337                 if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
 338                         type = "v4l2_int";
 339                         break;
 340                 }
 341                 printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
 342                 return;
 343 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 344         case 'v':
 345                 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
 346                         type = "v4l1";
 347                         break;
 348                 }
 349                 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
 350                 return;
 351 #endif
 352         case 'V':
 353                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
 354                         type = "v4l2";
 355                         break;
 356                 }
 357                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
 358                 return;
 359         default:
 360                 type = "unknown";
 361         }
 362
 363         switch (_IOC_DIR(cmd)) {
 364         case _IOC_NONE:              dir = "--"; break;
 365         case _IOC_READ:              dir = "r-"; break;
 366         case _IOC_WRITE:             dir = "-w"; break;
 367         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 368         default:                     dir = "*ERR*"; break;
 369         }
 370         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
 371                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 372 }
 373 EXPORT_SYMBOL(v4l_printk_ioctl);
 374
 375 /*
 376  *      sysfs stuff
 377  */
 378
 379 static ssize_t show_index(struct device *cd,
 380                          struct device_attribute *attr, char *buf)
 381 {
 382         struct video_device *vfd = container_of(cd, struct video_device,
 383                                                 class_dev);
 384         return sprintf(buf, "%i\n", vfd->index);
 385 }
 386
 387 static ssize_t show_name(struct device *cd,
 388                          struct device_attribute *attr, char *buf)
 389 {
 390         struct video_device *vfd = container_of(cd, struct video_device,
 391                                                 class_dev);
 392         return sprintf(buf, "%.*s\n", (int)sizeof(vfd->name), vfd->name);
 393 }
 394
 395 static struct device_attribute video_device_attrs[] = {
 396         __ATTR(name, S_IRUGO, show_name, NULL),
 397         __ATTR(index, S_IRUGO, show_index, NULL),
 398         __ATTR_NULL
 399 };
 400
 401 struct video_device *video_device_alloc(void)
 402 {
 403         struct video_device *vfd;
 404
 405         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
 406         return vfd;
 407 }
 408 EXPORT_SYMBOL(video_device_alloc);
 409
 410 void video_device_release(struct video_device *vfd)
 411 {
 412         kfree(vfd);
 413 }
 414 EXPORT_SYMBOL(video_device_release);
 415
 416 static void video_release(struct device *cd)
 417 {
 418         struct video_device *vfd = container_of(cd, struct video_device,
 419                                                                 class_dev);
 420
 421 #if 1
 422         /* needed until all drivers are fixed */
 423         if (!vfd->release)
 424                 return;
 425 #endif
 426         vfd->release(vfd);
 427 }
 428
 429 static struct class video_class = {
 430         .name    = VIDEO_NAME,
 431         .dev_attrs = video_device_attrs,
 432         .dev_release = video_release,
 433 };
 434
 435 /*
 436  *      Active devices
 437  */
 438
 439 static struct video_device *video_device[VIDEO_NUM_DEVICES];
 440 static DEFINE_MUTEX(videodev_lock);
 441
 442 struct video_device* video_devdata(struct file *file)
 443 {
 444         return video_device[iminor(file->f_path.dentry->d_inode)];
 445 }
 446 EXPORT_SYMBOL(video_devdata);
 447
 448 /*
 449  *      Open a video device - FIXME: Obsoleted
 450  */
 451 static int video_open(struct inode *inode, struct file *file)
 452 {
 453         unsigned int minor = iminor(inode);
 454         int err = 0;
 455         struct video_device *vfl;
 456         const struct file_operations *old_fops;
 457
 458         if(minor>=VIDEO_NUM_DEVICES)
 459                 return -ENODEV;
 460         lock_kernel();
 461         mutex_lock(&videodev_lock);
 462         vfl=video_device[minor];
 463         if(vfl==NULL) {
 464                 mutex_unlock(&videodev_lock);
 465                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
 466                 mutex_lock(&videodev_lock);
 467                 vfl=video_device[minor];
 468                 if (vfl==NULL) {
 469                         mutex_unlock(&videodev_lock);
 470                         unlock_kernel();
 471                         return -ENODEV;
 472                 }
 473         }
 474         old_fops = file->f_op;
 475         file->f_op = fops_get(vfl->fops);
 476         if(file->f_op->open)
 477                 err = file->f_op->open(inode,file);
 478         if (err) {
 479                 fops_put(file->f_op);
 480                 file->f_op = fops_get(old_fops);
 481         }
 482         fops_put(old_fops);
 483         mutex_unlock(&videodev_lock);
 484         unlock_kernel();
 485         return err;
 486 }
 487
 488 /*
 489  * helper function -- handles userspace copying for ioctl arguments
 490  */
 491
 492 #ifdef __OLD_VIDIOC_
 493 static unsigned int
 494 video_fix_command(unsigned int cmd)
 495 {
 496         switch (cmd) {
 497         case VIDIOC_OVERLAY_OLD:
 498                 cmd = VIDIOC_OVERLAY;
 499                 break;
 500         case VIDIOC_S_PARM_OLD:
 501                 cmd = VIDIOC_S_PARM;
 502                 break;
 503         case VIDIOC_S_CTRL_OLD:
 504                 cmd = VIDIOC_S_CTRL;
 505                 break;
 506         case VIDIOC_G_AUDIO_OLD:
 507                 cmd = VIDIOC_G_AUDIO;
 508                 break;
 509         case VIDIOC_G_AUDOUT_OLD:
 510                 cmd = VIDIOC_G_AUDOUT;
 511                 break;
 512         case VIDIOC_CROPCAP_OLD:
 513                 cmd = VIDIOC_CROPCAP;
 514                 break;
 515         }
 516         return cmd;
 517 }
 518 #endif
 519
 520 /*
 521  * Obsolete usercopy function - Should be removed soon
 522  */
 523 int
 524 video_usercopy(struct inode *inode, struct file *file,
 525                unsigned int cmd, unsigned long arg,
 526                int (*func)(struct inode *inode, struct file *file,
 527                            unsigned int cmd, void *arg))
 528 {
 529         char    sbuf[128];
 530         void    *mbuf = NULL;
 531         void    *parg = NULL;
 532         int     err  = -EINVAL;
 533         int     is_ext_ctrl;
 534         size_t  ctrls_size = 0;
 535         void __user *user_ptr = NULL;
 536
 537 #ifdef __OLD_VIDIOC_
 538         cmd = video_fix_command(cmd);
 539 #endif
 540         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 541                        cmd == VIDIOC_TRY_EXT_CTRLS);
 542
 543         /*  Copy arguments into temp kernel buffer  */
 544         switch (_IOC_DIR(cmd)) {
 545         case _IOC_NONE:
 546                 parg = NULL;
 547                 break;
 548         case _IOC_READ:
 549         case _IOC_WRITE:
 550         case (_IOC_WRITE | _IOC_READ):
 551                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 552                         parg = sbuf;
 553                 } else {
 554                         /* too big to allocate from stack */
 555                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
 556                         if (NULL == mbuf)
 557                                 return -ENOMEM;
 558                         parg = mbuf;
 559                 }
 560
 561                 err = -EFAULT;
 562                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 563                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 564                                 goto out;
 565                 break;
 566         }
 567         if (is_ext_ctrl) {
 568                 struct v4l2_ext_controls *p = parg;
 569
 570                 /* In case of an error, tell the caller that it wasn't
 571                    a specific control that caused it. */
 572                 p->error_idx = p->count;
 573                 user_ptr = (void __user *)p->controls;
 574                 if (p->count) {
 575                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 576                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 577                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 578                         err = -ENOMEM;
 579                         if (NULL == mbuf)
 580                                 goto out_ext_ctrl;
 581                         err = -EFAULT;
 582                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 583                                 goto out_ext_ctrl;
 584                         p->controls = mbuf;
 585                 }
 586         }
 587
 588         /* call driver */
 589         err = func(inode, file, cmd, parg);
 590         if (err == -ENOIOCTLCMD)
 591                 err = -EINVAL;
 592         if (is_ext_ctrl) {
 593                 struct v4l2_ext_controls *p = parg;
 594
 595                 p->controls = (void *)user_ptr;
 596                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 597                         err = -EFAULT;
 598                 goto out_ext_ctrl;
 599         }
 600         if (err < 0)
 601                 goto out;
 602
 603 out_ext_ctrl:
 604         /*  Copy results into user buffer  */
 605         switch (_IOC_DIR(cmd))
 606         {
 607         case _IOC_READ:
 608         case (_IOC_WRITE | _IOC_READ):
 609                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 610                         err = -EFAULT;
 611                 break;
 612         }
 613
 614 out:
 615         kfree(mbuf);
 616         return err;
 617 }
 618 EXPORT_SYMBOL(video_usercopy);
 619
 620 /*
 621  * open/release helper functions -- handle exclusive opens
 622  * Should be removed soon
 623  */
 624 int video_exclusive_open(struct inode *inode, struct file *file)
 625 {
 626         struct  video_device *vfl = video_devdata(file);
 627         int retval = 0;
 628
 629         mutex_lock(&vfl->lock);
 630         if (vfl->users) {
 631                 retval = -EBUSY;
 632         } else {
 633                 vfl->users++;
 634         }
 635         mutex_unlock(&vfl->lock);
 636         return retval;
 637 }
 638 EXPORT_SYMBOL(video_exclusive_open);
 639
 640 int video_exclusive_release(struct inode *inode, struct file *file)
 641 {
 642         struct  video_device *vfl = video_devdata(file);
 643
 644         vfl->users--;
 645         return 0;
 646 }
 647 EXPORT_SYMBOL(video_exclusive_release);
 648
 649 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 650                                         struct v4l2_buffer *p)
 651 {
 652         struct v4l2_timecode *tc=&p->timecode;
 653
 654         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 655                 "bytesused=%d, flags=0x%08d, "
 656                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 657                         (p->timestamp.tv_sec/3600),
 658                         (int)(p->timestamp.tv_sec/60)%60,
 659                         (int)(p->timestamp.tv_sec%60),
 660                         p->timestamp.tv_usec,
 661                         p->index,
 662                         prt_names(p->type, v4l2_type_names),
 663                         p->bytesused, p->flags,
 664                         p->field, p->sequence,
 665                         prt_names(p->memory, v4l2_memory_names),
 666                         p->m.userptr, p->length);
 667         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
 668                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 669                         tc->hours,tc->minutes,tc->seconds,
 670                         tc->type, tc->flags, tc->frames, *(__u32 *) tc->userbits);
 671 }
 672
 673 static inline void dbgrect(struct video_device *vfd, char *s,
 674                                                         struct v4l2_rect *r)
 675 {
 676         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
 677                                                 r->width, r->height);
 678 };
 679
 680 static inline void v4l_print_pix_fmt (struct video_device *vfd,
 681                                                 struct v4l2_pix_format *fmt)
 682 {
 683         dbgarg2 ("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 684                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 685                 fmt->width,fmt->height,
 686                 (fmt->pixelformat & 0xff),
 687                 (fmt->pixelformat >>  8) & 0xff,
 688                 (fmt->pixelformat >> 16) & 0xff,
 689                 (fmt->pixelformat >> 24) & 0xff,
 690                 prt_names(fmt->field, v4l2_field_names),
 691                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 692 };
 693
 694 static inline void v4l_print_ext_ctrls(unsigned int cmd,
 695         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
 696 {
 697         __u32 i;
 698
 699         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
 700                 return;
 701         dbgarg(cmd, "");
 702         printk(KERN_CONT "class=0x%x", c->ctrl_class);
 703         for (i = 0; i < c->count; i++) {
 704                 if (show_vals)
 705                         printk(KERN_CONT " id/val=0x%x/0x%x",
 706                                 c->controls[i].id, c->controls[i].value);
 707                 else
 708                         printk(KERN_CONT " id=0x%x", c->controls[i].id);
 709         }
 710         printk(KERN_CONT "\n");
 711 };
 712
 713 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 714 {
 715         __u32 i;
 716
 717         /* zero the reserved fields */
 718         c->reserved[0] = c->reserved[1] = 0;
 719         for (i = 0; i < c->count; i++) {
 720                 c->controls[i].reserved2[0] = 0;
 721                 c->controls[i].reserved2[1] = 0;
 722         }
 723         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 724            when using extended controls.
 725            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 726            is it allowed for backwards compatibility.
 727          */
 728         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 729                 return 0;
 730         /* Check that all controls are from the same control class. */
 731         for (i = 0; i < c->count; i++) {
 732                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 733                         c->error_idx = i;
 734                         return 0;
 735                 }
 736         }
 737         return 1;
 738 }
 739
 740 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
 741 {
 742         switch (type) {
 743         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 744                 if (vfd->vidioc_try_fmt_vid_cap)
 745                         return (0);
 746                 break;
 747         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 748                 if (vfd->vidioc_try_fmt_vid_overlay)
 749                         return (0);
 750                 break;
 751         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 752                 if (vfd->vidioc_try_fmt_vid_out)
 753                         return (0);
 754                 break;
 755         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 756                 if (vfd->vidioc_try_fmt_vid_out_overlay)
 757                         return (0);
 758                 break;
 759         case V4L2_BUF_TYPE_VBI_CAPTURE:
 760                 if (vfd->vidioc_try_fmt_vbi_cap)
 761                         return (0);
 762                 break;
 763         case V4L2_BUF_TYPE_VBI_OUTPUT:
 764                 if (vfd->vidioc_try_fmt_vbi_out)
 765                         return (0);
 766                 break;
 767         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 768                 if (vfd->vidioc_try_fmt_sliced_vbi_cap)
 769                         return (0);
 770                 break;
 771         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 772                 if (vfd->vidioc_try_fmt_sliced_vbi_out)
 773                         return (0);
 774                 break;
 775         case V4L2_BUF_TYPE_PRIVATE:
 776                 if (vfd->vidioc_try_fmt_type_private)
 777                         return (0);
 778                 break;
 779         }
 780         return (-EINVAL);
 781 }
 782
 783 static int __video_do_ioctl(struct inode *inode, struct file *file,
 784                 unsigned int cmd, void *arg)
 785 {
 786         struct video_device *vfd = video_devdata(file);
 787         void                 *fh = file->private_data;
 788         int                  ret = -EINVAL;
 789
 790         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
 791                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 792                 v4l_print_ioctl(vfd->name, cmd);
 793                 printk("\n");
 794         }
 795
 796 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 797         /***********************************************************
 798          Handles calls to the obsoleted V4L1 API
 799          Due to the nature of VIDIOCGMBUF, each driver that supports
 800          V4L1 should implement its own handler for this ioctl.
 801          ***********************************************************/
 802
 803         /* --- streaming capture ------------------------------------- */
 804         if (cmd == VIDIOCGMBUF) {
 805                 struct video_mbuf *p=arg;
 806
 807                 memset(p, 0, sizeof(*p));
 808
 809                 if (!vfd->vidiocgmbuf)
 810                         return ret;
 811                 ret=vfd->vidiocgmbuf(file, fh, p);
 812                 if (!ret)
 813                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 814                                                 p->size, p->frames,
 815                                                 (unsigned long)p->offsets);
 816                 return ret;
 817         }
 818
 819         /********************************************************
 820          All other V4L1 calls are handled by v4l1_compat module.
 821          Those calls will be translated into V4L2 calls, and
 822          __video_do_ioctl will be called again, with one or more
 823          V4L2 ioctls.
 824          ********************************************************/
 825         if (_IOC_TYPE(cmd)=='v')
 826                 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 827                                                 __video_do_ioctl);
 828 #endif
 829
 830         switch(cmd) {
 831         /* --- capabilities ------------------------------------------ */
 832         case VIDIOC_QUERYCAP:
 833         {
 834                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
 835                 memset(cap, 0, sizeof(*cap));
 836
 837                 if (!vfd->vidioc_querycap)
 838                         break;
 839
 840                 ret=vfd->vidioc_querycap(file, fh, cap);
 841                 if (!ret)
 842                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
 843                                         "version=0x%08x, "
 844                                         "capabilities=0x%08x\n",
 845                                         cap->driver,cap->card,cap->bus_info,
 846                                         cap->version,
 847                                         cap->capabilities);
 848                 break;
 849         }
 850
 851         /* --- priority ------------------------------------------ */
 852         case VIDIOC_G_PRIORITY:
 853         {
 854                 enum v4l2_priority *p=arg;
 855
 856                 if (!vfd->vidioc_g_priority)
 857                         break;
 858                 ret=vfd->vidioc_g_priority(file, fh, p);
 859                 if (!ret)
 860                         dbgarg(cmd, "priority is %d\n", *p);
 861                 break;
 862         }
 863         case VIDIOC_S_PRIORITY:
 864         {
 865                 enum v4l2_priority *p=arg;
 866
 867                 if (!vfd->vidioc_s_priority)
 868                         break;
 869                 dbgarg(cmd, "setting priority to %d\n", *p);
 870                 ret=vfd->vidioc_s_priority(file, fh, *p);
 871                 break;
 872         }
 873
 874         /* --- capture ioctls ---------------------------------------- */
 875         case VIDIOC_ENUM_FMT:
 876         {
 877                 struct v4l2_fmtdesc *f = arg;
 878                 enum v4l2_buf_type type;
 879                 unsigned int index;
 880
 881                 index = f->index;
 882                 type  = f->type;
 883                 memset(f,0,sizeof(*f));
 884                 f->index = index;
 885                 f->type  = type;
 886
 887                 switch (type) {
 888                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 889                         if (vfd->vidioc_enum_fmt_vid_cap)
 890                                 ret = vfd->vidioc_enum_fmt_vid_cap(file, fh, f);
 891                         break;
 892                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 893                         if (vfd->vidioc_enum_fmt_vid_overlay)
 894                                 ret = vfd->vidioc_enum_fmt_vid_overlay(file,
 895                                         fh, f);
 896                         break;
 897 #if 1
 898                 /* V4L2_BUF_TYPE_VBI_CAPTURE should not support VIDIOC_ENUM_FMT
 899                  * according to the spec. The bttv and saa7134 drivers support
 900                  * it though, so just warn that this is deprecated and will be
 901                  * removed in the near future. */
 902                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 903                         if (vfd->vidioc_enum_fmt_vbi_cap) {
 904                                 printk(KERN_WARNING "vidioc_enum_fmt_vbi_cap will be removed in 2.6.28!\n");
 905                                 ret = vfd->vidioc_enum_fmt_vbi_cap(file, fh, f);
 906                         }
 907                         break;
 908 #endif
 909                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 910                         if (vfd->vidioc_enum_fmt_vid_out)
 911                                 ret = vfd->vidioc_enum_fmt_vid_out(file, fh, f);
 912                         break;
 913                 case V4L2_BUF_TYPE_PRIVATE:
 914                         if (vfd->vidioc_enum_fmt_type_private)
 915                                 ret = vfd->vidioc_enum_fmt_type_private(file,
 916                                                                 fh, f);
 917                         break;
 918                 default:
 919                         break;
 920                 }
 921                 if (!ret)
 922                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
 923                                         "pixelformat=%c%c%c%c, description='%s'\n",
 924                                         f->index, f->type, f->flags,
 925                                         (f->pixelformat & 0xff),
 926                                         (f->pixelformat >>  8) & 0xff,
 927                                         (f->pixelformat >> 16) & 0xff,
 928                                         (f->pixelformat >> 24) & 0xff,
 929                                         f->description);
 930                 break;
 931         }
 932         case VIDIOC_G_FMT:
 933         {
 934                 struct v4l2_format *f = (struct v4l2_format *)arg;
 935
 936                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
 937
 938                 /* FIXME: Should be one dump per type */
 939                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 940
 941                 switch (f->type) {
 942                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 943                         if (vfd->vidioc_g_fmt_vid_cap)
 944                                 ret = vfd->vidioc_g_fmt_vid_cap(file, fh, f);
 945                         if (!ret)
 946                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 947                         break;
 948                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 949                         if (vfd->vidioc_g_fmt_vid_overlay)
 950                                 ret = vfd->vidioc_g_fmt_vid_overlay(file,
 951                                                                     fh, f);
 952                         break;
 953                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 954                         if (vfd->vidioc_g_fmt_vid_out)
 955                                 ret = vfd->vidioc_g_fmt_vid_out(file, fh, f);
 956                         if (!ret)
 957                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 958                         break;
 959                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 960                         if (vfd->vidioc_g_fmt_vid_out_overlay)
 961                                 ret = vfd->vidioc_g_fmt_vid_out_overlay(file,
 962                                        fh, f);
 963                         break;
 964                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 965                         if (vfd->vidioc_g_fmt_vbi_cap)
 966                                 ret = vfd->vidioc_g_fmt_vbi_cap(file, fh, f);
 967                         break;
 968                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 969                         if (vfd->vidioc_g_fmt_vbi_out)
 970                                 ret = vfd->vidioc_g_fmt_vbi_out(file, fh, f);
 971                         break;
 972                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 973                         if (vfd->vidioc_g_fmt_sliced_vbi_cap)
 974                                 ret = vfd->vidioc_g_fmt_sliced_vbi_cap(file,
 975                                                                         fh, f);
 976                         break;
 977                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 978                         if (vfd->vidioc_g_fmt_sliced_vbi_out)
 979                                 ret = vfd->vidioc_g_fmt_sliced_vbi_out(file,
 980                                                                         fh, f);
 981                         break;
 982                 case V4L2_BUF_TYPE_PRIVATE:
 983                         if (vfd->vidioc_g_fmt_type_private)
 984                                 ret = vfd->vidioc_g_fmt_type_private(file,
 985                                                                 fh, f);
 986                         break;
 987                 }
 988
 989                 break;
 990         }
 991         case VIDIOC_S_FMT:
 992         {
 993                 struct v4l2_format *f = (struct v4l2_format *)arg;
 994
 995                 /* FIXME: Should be one dump per type */
 996                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 997
 998                 switch (f->type) {
 999                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1000                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
1001                         if (vfd->vidioc_s_fmt_vid_cap)
1002                                 ret = vfd->vidioc_s_fmt_vid_cap(file, fh, f);
1003                         break;
1004                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1005                         if (vfd->vidioc_s_fmt_vid_overlay)
1006                                 ret = vfd->vidioc_s_fmt_vid_overlay(file,
1007                                                                     fh, f);
1008                         break;
1009                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1010                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
1011                         if (vfd->vidioc_s_fmt_vid_out)
1012                                 ret = vfd->vidioc_s_fmt_vid_out(file, fh, f);
1013                         break;
1014                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1015                         if (vfd->vidioc_s_fmt_vid_out_overlay)
1016                                 ret = vfd->vidioc_s_fmt_vid_out_overlay(file,
1017                                         fh, f);
1018                         break;
1019                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1020                         if (vfd->vidioc_s_fmt_vbi_cap)
1021                                 ret = vfd->vidioc_s_fmt_vbi_cap(file, fh, f);
1022                         break;
1023                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1024                         if (vfd->vidioc_s_fmt_vbi_out)
1025                                 ret = vfd->vidioc_s_fmt_vbi_out(file, fh, f);
1026                         break;
1027                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1028                         if (vfd->vidioc_s_fmt_sliced_vbi_cap)
1029                                 ret = vfd->vidioc_s_fmt_sliced_vbi_cap(file,
1030                                                                         fh, f);
1031                         break;
1032                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1033                         if (vfd->vidioc_s_fmt_sliced_vbi_out)
1034                                 ret = vfd->vidioc_s_fmt_sliced_vbi_out(file,
1035                                                                         fh, f);
1036                         break;
1037                 case V4L2_BUF_TYPE_PRIVATE:
1038                         if (vfd->vidioc_s_fmt_type_private)
1039                                 ret = vfd->vidioc_s_fmt_type_private(file,
1040                                                                 fh, f);
1041                         break;
1042                 }
1043                 break;
1044         }
1045         case VIDIOC_TRY_FMT:
1046         {
1047                 struct v4l2_format *f = (struct v4l2_format *)arg;
1048
1049                 /* FIXME: Should be one dump per type */
1050                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
1051                                                 v4l2_type_names));
1052                 switch (f->type) {
1053                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1054                         if (vfd->vidioc_try_fmt_vid_cap)
1055                                 ret = vfd->vidioc_try_fmt_vid_cap(file, fh, f);
1056                         if (!ret)
1057                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
1058                         break;
1059                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1060                         if (vfd->vidioc_try_fmt_vid_overlay)
1061                                 ret = vfd->vidioc_try_fmt_vid_overlay(file,
1062                                         fh, f);
1063                         break;
1064                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1065                         if (vfd->vidioc_try_fmt_vid_out)
1066                                 ret = vfd->vidioc_try_fmt_vid_out(file, fh, f);
1067                         if (!ret)
1068                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
1069                         break;
1070                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1071                         if (vfd->vidioc_try_fmt_vid_out_overlay)
1072                                 ret = vfd->vidioc_try_fmt_vid_out_overlay(file,
1073                                        fh, f);
1074                         break;
1075                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1076                         if (vfd->vidioc_try_fmt_vbi_cap)
1077                                 ret = vfd->vidioc_try_fmt_vbi_cap(file, fh, f);
1078                         break;
1079                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1080                         if (vfd->vidioc_try_fmt_vbi_out)
1081                                 ret = vfd->vidioc_try_fmt_vbi_out(file, fh, f);
1082                         break;
1083                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1084                         if (vfd->vidioc_try_fmt_sliced_vbi_cap)
1085                                 ret = vfd->vidioc_try_fmt_sliced_vbi_cap(file,
1086                                                                 fh, f);
1087                         break;
1088                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1089                         if (vfd->vidioc_try_fmt_sliced_vbi_out)
1090                                 ret = vfd->vidioc_try_fmt_sliced_vbi_out(file,
1091                                                                 fh, f);
1092                         break;
1093                 case V4L2_BUF_TYPE_PRIVATE:
1094                         if (vfd->vidioc_try_fmt_type_private)
1095                                 ret = vfd->vidioc_try_fmt_type_private(file,
1096                                                                 fh, f);
1097                         break;
1098                 }
1099
1100                 break;
1101         }
1102         /* FIXME: Those buf reqs could be handled here,
1103            with some changes on videobuf to allow its header to be included at
1104            videodev2.h or being merged at videodev2.
1105          */
1106         case VIDIOC_REQBUFS:
1107         {
1108                 struct v4l2_requestbuffers *p=arg;
1109
1110                 if (!vfd->vidioc_reqbufs)
1111                         break;
1112                 ret = check_fmt (vfd, p->type);
1113                 if (ret)
1114                         break;
1115
1116                 ret=vfd->vidioc_reqbufs(file, fh, p);
1117                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
1118                                 p->count,
1119                                 prt_names(p->type, v4l2_type_names),
1120                                 prt_names(p->memory, v4l2_memory_names));
1121                 break;
1122         }
1123         case VIDIOC_QUERYBUF:
1124         {
1125                 struct v4l2_buffer *p=arg;
1126
1127                 if (!vfd->vidioc_querybuf)
1128                         break;
1129                 ret = check_fmt (vfd, p->type);
1130                 if (ret)
1131                         break;
1132
1133                 ret=vfd->vidioc_querybuf(file, fh, p);
1134                 if (!ret)
1135                         dbgbuf(cmd,vfd,p);
1136                 break;
1137         }
1138         case VIDIOC_QBUF:
1139         {
1140                 struct v4l2_buffer *p=arg;
1141
1142                 if (!vfd->vidioc_qbuf)
1143                         break;
1144                 ret = check_fmt (vfd, p->type);
1145                 if (ret)
1146                         break;
1147
1148                 ret=vfd->vidioc_qbuf(file, fh, p);
1149                 if (!ret)
1150                         dbgbuf(cmd,vfd,p);
1151                 break;
1152         }
1153         case VIDIOC_DQBUF:
1154         {
1155                 struct v4l2_buffer *p=arg;
1156                 if (!vfd->vidioc_dqbuf)
1157                         break;
1158                 ret = check_fmt (vfd, p->type);
1159                 if (ret)
1160                         break;
1161
1162                 ret=vfd->vidioc_dqbuf(file, fh, p);
1163                 if (!ret)
1164                         dbgbuf(cmd,vfd,p);
1165                 break;
1166         }
1167         case VIDIOC_OVERLAY:
1168         {
1169                 int *i = arg;
1170
1171                 if (!vfd->vidioc_overlay)
1172                         break;
1173                 dbgarg (cmd, "value=%d\n",*i);
1174                 ret=vfd->vidioc_overlay(file, fh, *i);
1175                 break;
1176         }
1177         case VIDIOC_G_FBUF:
1178         {
1179                 struct v4l2_framebuffer *p = arg;
1180
1181                 if (!vfd->vidioc_g_fbuf)
1182                         break;
1183                 ret = vfd->vidioc_g_fbuf(file, fh, arg);
1184                 if (!ret) {
1185                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1186                                         p->capability, p->flags,
1187                                         (unsigned long)p->base);
1188                         v4l_print_pix_fmt(vfd, &p->fmt);
1189                 }
1190                 break;
1191         }
1192         case VIDIOC_S_FBUF:
1193         {
1194                 struct v4l2_framebuffer *p = arg;
1195
1196                 if (!vfd->vidioc_s_fbuf)
1197                         break;
1198                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1199                         p->capability, p->flags, (unsigned long)p->base);
1200                 v4l_print_pix_fmt(vfd, &p->fmt);
1201                 ret = vfd->vidioc_s_fbuf(file, fh, arg);
1202                 break;
1203         }
1204         case VIDIOC_STREAMON:
1205         {
1206                 enum v4l2_buf_type i = *(int *)arg;
1207                 if (!vfd->vidioc_streamon)
1208                         break;
1209                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1210                 ret=vfd->vidioc_streamon(file, fh,i);
1211                 break;
1212         }
1213         case VIDIOC_STREAMOFF:
1214         {
1215                 enum v4l2_buf_type i = *(int *)arg;
1216
1217                 if (!vfd->vidioc_streamoff)
1218                         break;
1219                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1220                 ret=vfd->vidioc_streamoff(file, fh, i);
1221                 break;
1222         }
1223         /* ---------- tv norms ---------- */
1224         case VIDIOC_ENUMSTD:
1225         {
1226                 struct v4l2_standard *p = arg;
1227                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1228                 unsigned int index = p->index, i, j = 0;
1229                 const char *descr = "";
1230
1231                 /* Return norm array in a canonical way */
1232                 for (i = 0; i <= index && id; i++) {
1233                         /* last std value in the standards array is 0, so this
1234                            while always ends there since (id & 0) == 0. */
1235                         while ((id & standards[j].std) != standards[j].std)
1236                                 j++;
1237                         curr_id = standards[j].std;
1238                         descr = standards[j].descr;
1239                         j++;
1240                         if (curr_id == 0)
1241                                 break;
1242                         if (curr_id != V4L2_STD_PAL &&
1243                             curr_id != V4L2_STD_SECAM &&
1244                             curr_id != V4L2_STD_NTSC)
1245                                 id &= ~curr_id;
1246                 }
1247                 if (i <= index)
1248                         return -EINVAL;
1249
1250                 v4l2_video_std_construct(p, curr_id, descr);
1251                 p->index = index;
1252
1253                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1254                                 "framelines=%d\n", p->index,
1255                                 (unsigned long long)p->id, p->name,
1256                                 p->frameperiod.numerator,
1257                                 p->frameperiod.denominator,
1258                                 p->framelines);
1259
1260                 ret = 0;
1261                 break;
1262         }
1263         case VIDIOC_G_STD:
1264         {
1265                 v4l2_std_id *id = arg;
1266
1267                 ret = 0;
1268                 /* Calls the specific handler */
1269                 if (vfd->vidioc_g_std)
1270                         ret = vfd->vidioc_g_std(file, fh, id);
1271                 else
1272                         *id = vfd->current_norm;
1273
1274                 if (!ret)
1275                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1276                 break;
1277         }
1278         case VIDIOC_S_STD:
1279         {
1280                 v4l2_std_id *id = arg,norm;
1281
1282                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1283
1284                 norm = (*id) & vfd->tvnorms;
1285                 if ( vfd->tvnorms && !norm)     /* Check if std is supported */
1286                         break;
1287
1288                 /* Calls the specific handler */
1289                 if (vfd->vidioc_s_std)
1290                         ret=vfd->vidioc_s_std(file, fh, &norm);
1291                 else
1292                         ret=-EINVAL;
1293
1294                 /* Updates standard information */
1295                 if (ret>=0)
1296                         vfd->current_norm=norm;
1297
1298                 break;
1299         }
1300         case VIDIOC_QUERYSTD:
1301         {
1302                 v4l2_std_id *p=arg;
1303
1304                 if (!vfd->vidioc_querystd)
1305                         break;
1306                 ret=vfd->vidioc_querystd(file, fh, arg);
1307                 if (!ret)
1308                         dbgarg (cmd, "detected std=%08Lx\n",
1309                                                 (unsigned long long)*p);
1310                 break;
1311         }
1312         /* ------ input switching ---------- */
1313         /* FIXME: Inputs can be handled inside videodev2 */
1314         case VIDIOC_ENUMINPUT:
1315         {
1316                 struct v4l2_input *p=arg;
1317                 int i=p->index;
1318
1319                 if (!vfd->vidioc_enum_input)
1320                         break;
1321                 memset(p, 0, sizeof(*p));
1322                 p->index=i;
1323
1324                 ret=vfd->vidioc_enum_input(file, fh, p);
1325                 if (!ret)
1326                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1327                                         "audioset=%d, "
1328                                         "tuner=%d, std=%08Lx, status=%d\n",
1329                                         p->index,p->name,p->type,p->audioset,
1330                                         p->tuner,
1331                                         (unsigned long long)p->std,
1332                                         p->status);
1333                 break;
1334         }
1335         case VIDIOC_G_INPUT:
1336         {
1337                 unsigned int *i = arg;
1338
1339                 if (!vfd->vidioc_g_input)
1340                         break;
1341                 ret=vfd->vidioc_g_input(file, fh, i);
1342                 if (!ret)
1343                         dbgarg (cmd, "value=%d\n",*i);
1344                 break;
1345         }
1346         case VIDIOC_S_INPUT:
1347         {
1348                 unsigned int *i = arg;
1349
1350                 if (!vfd->vidioc_s_input)
1351                         break;
1352                 dbgarg (cmd, "value=%d\n",*i);
1353                 ret=vfd->vidioc_s_input(file, fh, *i);
1354                 break;
1355         }
1356
1357         /* ------ output switching ---------- */
1358         case VIDIOC_ENUMOUTPUT:
1359         {
1360                 struct v4l2_output *p = arg;
1361                 int i = p->index;
1362
1363                 if (!vfd->vidioc_enum_output)
1364                         break;
1365                 memset(p, 0, sizeof(*p));
1366                 p->index = i;
1367
1368                 ret = vfd->vidioc_enum_output(file, fh, p);
1369                 if (!ret)
1370                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1371                                 "audioset=0x%x, "
1372                                 "modulator=%d, std=0x%08Lx\n",
1373                                 p->index, p->name, p->type, p->audioset,
1374                                 p->modulator, (unsigned long long)p->std);
1375                 break;
1376         }
1377         case VIDIOC_G_OUTPUT:
1378         {
1379                 unsigned int *i = arg;
1380
1381                 if (!vfd->vidioc_g_output)
1382                         break;
1383                 ret=vfd->vidioc_g_output(file, fh, i);
1384                 if (!ret)
1385                         dbgarg (cmd, "value=%d\n",*i);
1386                 break;
1387         }
1388         case VIDIOC_S_OUTPUT:
1389         {
1390                 unsigned int *i = arg;
1391
1392                 if (!vfd->vidioc_s_output)
1393                         break;
1394                 dbgarg (cmd, "value=%d\n",*i);
1395                 ret=vfd->vidioc_s_output(file, fh, *i);
1396                 break;
1397         }
1398
1399         /* --- controls ---------------------------------------------- */
1400         case VIDIOC_QUERYCTRL:
1401         {
1402                 struct v4l2_queryctrl *p = arg;
1403
1404                 if (!vfd->vidioc_queryctrl)
1405                         break;
1406                 ret = vfd->vidioc_queryctrl(file, fh, p);
1407                 if (!ret)
1408                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1409                                         "step=%d, default=%d, flags=0x%08x\n",
1410                                         p->id, p->type, p->name,
1411                                         p->minimum, p->maximum,
1412                                         p->step, p->default_value, p->flags);
1413                 else
1414                         dbgarg(cmd, "id=0x%x\n", p->id);
1415                 break;
1416         }
1417         case VIDIOC_G_CTRL:
1418         {
1419                 struct v4l2_control *p = arg;
1420
1421                 if (vfd->vidioc_g_ctrl)
1422                         ret = vfd->vidioc_g_ctrl(file, fh, p);
1423                 else if (vfd->vidioc_g_ext_ctrls) {
1424                         struct v4l2_ext_controls ctrls;
1425                         struct v4l2_ext_control ctrl;
1426
1427                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1428                         ctrls.count = 1;
1429                         ctrls.controls = &ctrl;
1430                         ctrl.id = p->id;
1431                         ctrl.value = p->value;
1432                         if (check_ext_ctrls(&ctrls, 1)) {
1433                                 ret = vfd->vidioc_g_ext_ctrls(file, fh, &ctrls);
1434                                 if (ret == 0)
1435                                         p->value = ctrl.value;
1436                         }
1437                 } else
1438                         break;
1439                 if (!ret)
1440                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1441                 else
1442                         dbgarg(cmd, "id=0x%x\n", p->id);
1443                 break;
1444         }
1445         case VIDIOC_S_CTRL:
1446         {
1447                 struct v4l2_control *p = arg;
1448                 struct v4l2_ext_controls ctrls;
1449                 struct v4l2_ext_control ctrl;
1450
1451                 if (!vfd->vidioc_s_ctrl && !vfd->vidioc_s_ext_ctrls)
1452                         break;
1453
1454                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1455
1456                 if (vfd->vidioc_s_ctrl) {
1457                         ret = vfd->vidioc_s_ctrl(file, fh, p);
1458                         break;
1459                 }
1460                 if (!vfd->vidioc_s_ext_ctrls)
1461                         break;
1462
1463                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1464                 ctrls.count = 1;
1465                 ctrls.controls = &ctrl;
1466                 ctrl.id = p->id;
1467                 ctrl.value = p->value;
1468                 if (check_ext_ctrls(&ctrls, 1))
1469                         ret = vfd->vidioc_s_ext_ctrls(file, fh, &ctrls);
1470                 break;
1471         }
1472         case VIDIOC_G_EXT_CTRLS:
1473         {
1474                 struct v4l2_ext_controls *p = arg;
1475
1476                 p->error_idx = p->count;
1477                 if (!vfd->vidioc_g_ext_ctrls)
1478                         break;
1479                 if (check_ext_ctrls(p, 0))
1480                         ret = vfd->vidioc_g_ext_ctrls(file, fh, p);
1481                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1482                 break;
1483         }
1484         case VIDIOC_S_EXT_CTRLS:
1485         {
1486                 struct v4l2_ext_controls *p = arg;
1487
1488                 p->error_idx = p->count;
1489                 if (!vfd->vidioc_s_ext_ctrls)
1490                         break;
1491                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1492                 if (check_ext_ctrls(p, 0))
1493                         ret = vfd->vidioc_s_ext_ctrls(file, fh, p);
1494                 break;
1495         }
1496         case VIDIOC_TRY_EXT_CTRLS:
1497         {
1498                 struct v4l2_ext_controls *p = arg;
1499
1500                 p->error_idx = p->count;
1501                 if (!vfd->vidioc_try_ext_ctrls)
1502                         break;
1503                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1504                 if (check_ext_ctrls(p, 0))
1505                         ret = vfd->vidioc_try_ext_ctrls(file, fh, p);
1506                 break;
1507         }
1508         case VIDIOC_QUERYMENU:
1509         {
1510                 struct v4l2_querymenu *p = arg;
1511
1512                 if (!vfd->vidioc_querymenu)
1513                         break;
1514                 ret = vfd->vidioc_querymenu(file, fh, p);
1515                 if (!ret)
1516                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1517                                 p->id, p->index, p->name);
1518                 else
1519                         dbgarg(cmd, "id=0x%x, index=%d\n",
1520                                 p->id, p->index);
1521                 break;
1522         }
1523         /* --- audio ---------------------------------------------- */
1524         case VIDIOC_ENUMAUDIO:
1525         {
1526                 struct v4l2_audio *p = arg;
1527
1528                 if (!vfd->vidioc_enumaudio)
1529                         break;
1530                 ret = vfd->vidioc_enumaudio(file, fh, p);
1531                 if (!ret)
1532                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1533                                         "mode=0x%x\n", p->index, p->name,
1534                                         p->capability, p->mode);
1535                 else
1536                         dbgarg(cmd, "index=%d\n", p->index);
1537                 break;
1538         }
1539         case VIDIOC_G_AUDIO:
1540         {
1541                 struct v4l2_audio *p = arg;
1542                 __u32 index = p->index;
1543
1544                 if (!vfd->vidioc_g_audio)
1545                         break;
1546
1547                 memset(p, 0, sizeof(*p));
1548                 p->index = index;
1549                 ret = vfd->vidioc_g_audio(file, fh, p);
1550                 if (!ret)
1551                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1552                                         "mode=0x%x\n", p->index,
1553                                         p->name, p->capability, p->mode);
1554                 else
1555                         dbgarg(cmd, "index=%d\n", p->index);
1556                 break;
1557         }
1558         case VIDIOC_S_AUDIO:
1559         {
1560                 struct v4l2_audio *p = arg;
1561
1562                 if (!vfd->vidioc_s_audio)
1563                         break;
1564                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1565                                         "mode=0x%x\n", p->index, p->name,
1566                                         p->capability, p->mode);
1567                 ret = vfd->vidioc_s_audio(file, fh, p);
1568                 break;
1569         }
1570         case VIDIOC_ENUMAUDOUT:
1571         {
1572                 struct v4l2_audioout *p=arg;
1573
1574                 if (!vfd->vidioc_enumaudout)
1575                         break;
1576                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1577                 ret=vfd->vidioc_enumaudout(file, fh, p);
1578                 if (!ret)
1579                         dbgarg2("index=%d, name=%s, capability=%d, "
1580                                         "mode=%d\n", p->index, p->name,
1581                                         p->capability,p->mode);
1582                 break;
1583         }
1584         case VIDIOC_G_AUDOUT:
1585         {
1586                 struct v4l2_audioout *p=arg;
1587
1588                 if (!vfd->vidioc_g_audout)
1589                         break;
1590                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1591                 ret=vfd->vidioc_g_audout(file, fh, p);
1592                 if (!ret)
1593                         dbgarg2("index=%d, name=%s, capability=%d, "
1594                                         "mode=%d\n", p->index, p->name,
1595                                         p->capability,p->mode);
1596                 break;
1597         }
1598         case VIDIOC_S_AUDOUT:
1599         {
1600                 struct v4l2_audioout *p=arg;
1601
1602                 if (!vfd->vidioc_s_audout)
1603                         break;
1604                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1605                                         "mode=%d\n", p->index, p->name,
1606                                         p->capability,p->mode);
1607
1608                 ret=vfd->vidioc_s_audout(file, fh, p);
1609                 break;
1610         }
1611         case VIDIOC_G_MODULATOR:
1612         {
1613                 struct v4l2_modulator *p=arg;
1614                 if (!vfd->vidioc_g_modulator)
1615                         break;
1616                 ret=vfd->vidioc_g_modulator(file, fh, p);
1617                 if (!ret)
1618                         dbgarg(cmd, "index=%d, name=%s, "
1619                                         "capability=%d, rangelow=%d,"
1620                                         " rangehigh=%d, txsubchans=%d\n",
1621                                         p->index, p->name,p->capability,
1622                                         p->rangelow, p->rangehigh,
1623                                         p->txsubchans);
1624                 break;
1625         }
1626         case VIDIOC_S_MODULATOR:
1627         {
1628                 struct v4l2_modulator *p=arg;
1629                 if (!vfd->vidioc_s_modulator)
1630                         break;
1631                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1632                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1633                                 p->index, p->name,p->capability,p->rangelow,
1634                                 p->rangehigh,p->txsubchans);
1635                         ret=vfd->vidioc_s_modulator(file, fh, p);
1636                 break;
1637         }
1638         case VIDIOC_G_CROP:
1639         {
1640                 struct v4l2_crop *p=arg;
1641                 if (!vfd->vidioc_g_crop)
1642                         break;
1643                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1644                 ret=vfd->vidioc_g_crop(file, fh, p);
1645                 if (!ret) {
1646                         dbgrect(vfd, "", &p->c);
1647                 }
1648                 break;
1649         }
1650         case VIDIOC_S_CROP:
1651         {
1652                 struct v4l2_crop *p=arg;
1653                 if (!vfd->vidioc_s_crop)
1654                         break;
1655                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1656                 dbgrect(vfd, "", &p->c);
1657                 ret=vfd->vidioc_s_crop(file, fh, p);
1658                 break;
1659         }
1660         case VIDIOC_CROPCAP:
1661         {
1662                 struct v4l2_cropcap *p = arg;
1663
1664                 /*FIXME: Should also show v4l2_fract pixelaspect */
1665                 if (!vfd->vidioc_cropcap)
1666                         break;
1667                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1668                 ret = vfd->vidioc_cropcap(file, fh, p);
1669                 if (!ret) {
1670                         dbgrect(vfd, "bounds ", &p->bounds);
1671                         dbgrect(vfd, "defrect ", &p->defrect);
1672                 }
1673                 break;
1674         }
1675         case VIDIOC_G_JPEGCOMP:
1676         {
1677                 struct v4l2_jpegcompression *p=arg;
1678                 if (!vfd->vidioc_g_jpegcomp)
1679                         break;
1680                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1681                 if (!ret)
1682                         dbgarg (cmd, "quality=%d, APPn=%d, "
1683                                                 "APP_len=%d, COM_len=%d, "
1684                                                 "jpeg_markers=%d\n",
1685                                                 p->quality,p->APPn,p->APP_len,
1686                                                 p->COM_len,p->jpeg_markers);
1687                 break;
1688         }
1689         case VIDIOC_S_JPEGCOMP:
1690         {
1691                 struct v4l2_jpegcompression *p=arg;
1692                 if (!vfd->vidioc_g_jpegcomp)
1693                         break;
1694                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1695                                         "COM_len=%d, jpeg_markers=%d\n",
1696                                         p->quality,p->APPn,p->APP_len,
1697                                         p->COM_len,p->jpeg_markers);
1698                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1699                 break;
1700         }
1701         case VIDIOC_G_ENC_INDEX:
1702         {
1703                 struct v4l2_enc_idx *p=arg;
1704
1705                 if (!vfd->vidioc_g_enc_index)
1706                         break;
1707                 ret=vfd->vidioc_g_enc_index(file, fh, p);
1708                 if (!ret)
1709                         dbgarg (cmd, "entries=%d, entries_cap=%d\n",
1710                                         p->entries,p->entries_cap);
1711                 break;
1712         }
1713         case VIDIOC_ENCODER_CMD:
1714         {
1715                 struct v4l2_encoder_cmd *p = arg;
1716
1717                 if (!vfd->vidioc_encoder_cmd)
1718                         break;
1719                 memset(&p->raw, 0, sizeof(p->raw));
1720                 ret = vfd->vidioc_encoder_cmd(file, fh, p);
1721                 if (!ret)
1722                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1723                 break;
1724         }
1725         case VIDIOC_TRY_ENCODER_CMD:
1726         {
1727                 struct v4l2_encoder_cmd *p = arg;
1728
1729                 if (!vfd->vidioc_try_encoder_cmd)
1730                         break;
1731                 memset(&p->raw, 0, sizeof(p->raw));
1732                 ret = vfd->vidioc_try_encoder_cmd(file, fh, p);
1733                 if (!ret)
1734                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1735                 break;
1736         }
1737         case VIDIOC_G_PARM:
1738         {
1739                 struct v4l2_streamparm *p=arg;
1740                 __u32 type=p->type;
1741
1742                 memset(p,0,sizeof(*p));
1743                 p->type=type;
1744
1745                 if (vfd->vidioc_g_parm) {
1746                         ret=vfd->vidioc_g_parm(file, fh, p);
1747                 } else {
1748                         struct v4l2_standard s;
1749
1750                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1751                                 return -EINVAL;
1752
1753                         v4l2_video_std_construct(&s, vfd->current_norm,
1754                                                  v4l2_norm_to_name(vfd->current_norm));
1755
1756                         p->parm.capture.timeperframe = s.frameperiod;
1757                         ret=0;
1758                 }
1759
1760                 dbgarg (cmd, "type=%d\n", p->type);
1761                 break;
1762         }
1763         case VIDIOC_S_PARM:
1764         {
1765                 struct v4l2_streamparm *p=arg;
1766                 if (!vfd->vidioc_s_parm)
1767                         break;
1768                 dbgarg (cmd, "type=%d\n", p->type);
1769                 ret=vfd->vidioc_s_parm(file, fh, p);
1770                 break;
1771         }
1772         case VIDIOC_G_TUNER:
1773         {
1774                 struct v4l2_tuner *p = arg;
1775                 __u32 index = p->index;
1776
1777                 if (!vfd->vidioc_g_tuner)
1778                         break;
1779
1780                 memset(p, 0, sizeof(*p));
1781                 p->index = index;
1782
1783                 ret = vfd->vidioc_g_tuner(file, fh, p);
1784                 if (!ret)
1785                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1786                                         "capability=0x%x, rangelow=%d, "
1787                                         "rangehigh=%d, signal=%d, afc=%d, "
1788                                         "rxsubchans=0x%x, audmode=%d\n",
1789                                         p->index, p->name, p->type,
1790                                         p->capability, p->rangelow,
1791                                         p->rangehigh, p->signal, p->afc,
1792                                         p->rxsubchans, p->audmode);
1793                 break;
1794         }
1795         case VIDIOC_S_TUNER:
1796         {
1797                 struct v4l2_tuner *p = arg;
1798
1799                 if (!vfd->vidioc_s_tuner)
1800                         break;
1801                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1802                                 "capability=0x%x, rangelow=%d, "
1803                                 "rangehigh=%d, signal=%d, afc=%d, "
1804                                 "rxsubchans=0x%x, audmode=%d\n",
1805                                 p->index, p->name, p->type,
1806                                 p->capability, p->rangelow,
1807                                 p->rangehigh, p->signal, p->afc,
1808                                 p->rxsubchans, p->audmode);
1809                 ret = vfd->vidioc_s_tuner(file, fh, p);
1810                 break;
1811         }
1812         case VIDIOC_G_FREQUENCY:
1813         {
1814                 struct v4l2_frequency *p = arg;
1815
1816                 if (!vfd->vidioc_g_frequency)
1817                         break;
1818
1819                 memset(p->reserved, 0, sizeof(p->reserved));
1820
1821                 ret = vfd->vidioc_g_frequency(file, fh, p);
1822                 if (!ret)
1823                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1824                                         p->tuner, p->type, p->frequency);
1825                 break;
1826         }
1827         case VIDIOC_S_FREQUENCY:
1828         {
1829                 struct v4l2_frequency *p=arg;
1830                 if (!vfd->vidioc_s_frequency)
1831                         break;
1832                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1833                                 p->tuner,p->type,p->frequency);
1834                 ret=vfd->vidioc_s_frequency(file, fh, p);
1835                 break;
1836         }
1837         case VIDIOC_G_SLICED_VBI_CAP:
1838         {
1839                 struct v4l2_sliced_vbi_cap *p = arg;
1840                 __u32 type = p->type;
1841
1842                 if (!vfd->vidioc_g_sliced_vbi_cap)
1843                         break;
1844                 memset(p, 0, sizeof(*p));
1845                 p->type = type;
1846                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1847                 ret = vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1848                 if (!ret)
1849                         dbgarg2("service_set=%d\n", p->service_set);
1850                 break;
1851         }
1852         case VIDIOC_LOG_STATUS:
1853         {
1854                 if (!vfd->vidioc_log_status)
1855                         break;
1856                 ret=vfd->vidioc_log_status(file, fh);
1857                 break;
1858         }
1859 #ifdef CONFIG_VIDEO_ADV_DEBUG
1860         case VIDIOC_DBG_G_REGISTER:
1861         {
1862                 struct v4l2_register *p=arg;
1863                 if (!capable(CAP_SYS_ADMIN))
1864                         ret=-EPERM;
1865                 else if (vfd->vidioc_g_register)
1866                         ret=vfd->vidioc_g_register(file, fh, p);
1867                 break;
1868         }
1869         case VIDIOC_DBG_S_REGISTER:
1870         {
1871                 struct v4l2_register *p=arg;
1872                 if (!capable(CAP_SYS_ADMIN))
1873                         ret=-EPERM;
1874                 else if (vfd->vidioc_s_register)
1875                         ret=vfd->vidioc_s_register(file, fh, p);
1876                 break;
1877         }
1878 #endif
1879         case VIDIOC_G_CHIP_IDENT:
1880         {
1881                 struct v4l2_chip_ident *p=arg;
1882                 if (!vfd->vidioc_g_chip_ident)
1883                         break;
1884                 ret=vfd->vidioc_g_chip_ident(file, fh, p);
1885                 if (!ret)
1886                         dbgarg (cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1887                 break;
1888         }
1889         default:
1890         {
1891                 if (!vfd->vidioc_default)
1892                         break;
1893                 ret = vfd->vidioc_default(file, fh, cmd, arg);
1894                 break;
1895         }
1896         case VIDIOC_S_HW_FREQ_SEEK:
1897         {
1898                 struct v4l2_hw_freq_seek *p = arg;
1899                 if (!vfd->vidioc_s_hw_freq_seek)
1900                         break;
1901                 dbgarg(cmd,
1902                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1903                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1904                 ret = vfd->vidioc_s_hw_freq_seek(file, fh, p);
1905                 break;
1906         }
1907         } /* switch */
1908
1909         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1910                 if (ret < 0) {
1911                         v4l_print_ioctl(vfd->name, cmd);
1912                         printk(KERN_CONT " error %d\n", ret);
1913                 }
1914         }
1915
1916         return ret;
1917 }
1918
1919 int video_ioctl2 (struct inode *inode, struct file *file,
1920                unsigned int cmd, unsigned long arg)
1921 {
1922         char    sbuf[128];
1923         void    *mbuf = NULL;
1924         void    *parg = NULL;
1925         int     err  = -EINVAL;
1926         int     is_ext_ctrl;
1927         size_t  ctrls_size = 0;
1928         void __user *user_ptr = NULL;
1929
1930 #ifdef __OLD_VIDIOC_
1931         cmd = video_fix_command(cmd);
1932 #endif
1933         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1934                        cmd == VIDIOC_TRY_EXT_CTRLS);
1935
1936         /*  Copy arguments into temp kernel buffer  */
1937         switch (_IOC_DIR(cmd)) {
1938         case _IOC_NONE:
1939                 parg = NULL;
1940                 break;
1941         case _IOC_READ:
1942         case _IOC_WRITE:
1943         case (_IOC_WRITE | _IOC_READ):
1944                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1945                         parg = sbuf;
1946                 } else {
1947                         /* too big to allocate from stack */
1948                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1949                         if (NULL == mbuf)
1950                                 return -ENOMEM;
1951                         parg = mbuf;
1952                 }
1953
1954                 err = -EFAULT;
1955                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1956                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1957                                 goto out;
1958                 break;
1959         }
1960
1961         if (is_ext_ctrl) {
1962                 struct v4l2_ext_controls *p = parg;
1963
1964                 /* In case of an error, tell the caller that it wasn't
1965                    a specific control that caused it. */
1966                 p->error_idx = p->count;
1967                 user_ptr = (void __user *)p->controls;
1968                 if (p->count) {
1969                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1970                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1971                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1972                         err = -ENOMEM;
1973                         if (NULL == mbuf)
1974                                 goto out_ext_ctrl;
1975                         err = -EFAULT;
1976                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1977                                 goto out_ext_ctrl;
1978                         p->controls = mbuf;
1979                 }
1980         }
1981
1982         /* Handles IOCTL */
1983         err = __video_do_ioctl(inode, file, cmd, parg);
1984         if (err == -ENOIOCTLCMD)
1985                 err = -EINVAL;
1986         if (is_ext_ctrl) {
1987                 struct v4l2_ext_controls *p = parg;
1988
1989                 p->controls = (void *)user_ptr;
1990                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1991                         err = -EFAULT;
1992                 goto out_ext_ctrl;
1993         }
1994         if (err < 0)
1995                 goto out;
1996
1997 out_ext_ctrl:
1998         /*  Copy results into user buffer  */
1999         switch (_IOC_DIR(cmd))
2000         {
2001         case _IOC_READ:
2002         case (_IOC_WRITE | _IOC_READ):
2003                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2004                         err = -EFAULT;
2005                 break;
2006         }
2007
2008 out:
2009         kfree(mbuf);
2010         return err;
2011 }
2012 EXPORT_SYMBOL(video_ioctl2);
2013
2014 /**
2015  * get_index - assign stream number based on parent device
2016  * @vdev: video_device to assign index number to, vdev->dev should be assigned
2017  * @num: -1 if auto assign, requested number otherwise
2018  *
2019  *
2020  * returns -ENFILE if num is already in use, a free index number if
2021  * successful.
2022  */
2023 static int get_index(struct video_device *vdev, int num)
2024 {
2025         u32 used = 0;
2026         const int max_index = sizeof(used) * 8 - 1;
2027         int i;
2028
2029         /* Currently a single v4l driver instance cannot create more than
2030            32 devices.
2031            Increase to u64 or an array of u32 if more are needed. */
2032         if (num > max_index) {
2033                 printk(KERN_ERR "videodev: %s num is too large\n", __func__);
2034                 return -EINVAL;
2035         }
2036
2037         for (i = 0; i < VIDEO_NUM_DEVICES; i++) {
2038                 if (video_device[i] != NULL &&
2039                     video_device[i] != vdev &&
2040                     video_device[i]->dev == vdev->dev) {
2041                         used |= 1 << video_device[i]->index;
2042                 }
2043         }
2044
2045         if (num >= 0) {
2046                 if (used & (1 << num))
2047                         return -ENFILE;
2048                 return num;
2049         }
2050
2051         i = ffz(used);
2052         return i > max_index ? -ENFILE : i;
2053 }
2054
2055 static const struct file_operations video_fops;
2056
2057 int video_register_device(struct video_device *vfd, int type, int nr)
2058 {
2059         return video_register_device_index(vfd, type, nr, -1);
2060 }
2061 EXPORT_SYMBOL(video_register_device);
2062
2063 /**
2064  *      video_register_device - register video4linux devices
2065  *      @vfd:  video device structure we want to register
2066  *      @type: type of device to register
2067  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
2068  *             -1 == first free)
2069  *
2070  *      The registration code assigns minor numbers based on the type
2071  *      requested. -ENFILE is returned in all the device slots for this
2072  *      category are full. If not then the minor field is set and the
2073  *      driver initialize function is called (if non %NULL).
2074  *
2075  *      Zero is returned on success.
2076  *
2077  *      Valid types are
2078  *
2079  *      %VFL_TYPE_GRABBER - A frame grabber
2080  *
2081  *      %VFL_TYPE_VTX - A teletext device
2082  *
2083  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
2084  *
2085  *      %VFL_TYPE_RADIO - A radio card
2086  */
2087
2088 int video_register_device_index(struct video_device *vfd, int type, int nr,
2089                                         int index)
2090 {
2091         int i=0;
2092         int base;
2093         int end;
2094         int ret;
2095         char *name_base;
2096
2097         switch(type)
2098         {
2099                 case VFL_TYPE_GRABBER:
2100                         base=MINOR_VFL_TYPE_GRABBER_MIN;
2101                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
2102                         name_base = "video";
2103                         break;
2104                 case VFL_TYPE_VTX:
2105                         base=MINOR_VFL_TYPE_VTX_MIN;
2106                         end=MINOR_VFL_TYPE_VTX_MAX+1;
2107                         name_base = "vtx";
2108                         break;
2109                 case VFL_TYPE_VBI:
2110                         base=MINOR_VFL_TYPE_VBI_MIN;
2111                         end=MINOR_VFL_TYPE_VBI_MAX+1;
2112                         name_base = "vbi";
2113                         break;
2114                 case VFL_TYPE_RADIO:
2115                         base=MINOR_VFL_TYPE_RADIO_MIN;
2116                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
2117                         name_base = "radio";
2118                         break;
2119                 default:
2120                         printk(KERN_ERR "%s called with unknown type: %d\n",
2121                                __func__, type);
2122                         return -1;
2123         }
2124
2125         /* pick a minor number */
2126         mutex_lock(&videodev_lock);
2127         if (nr >= 0  &&  nr < end-base) {
2128                 /* use the one the driver asked for */
2129                 i = base+nr;
2130                 if (NULL != video_device[i]) {
2131                         mutex_unlock(&videodev_lock);
2132                         return -ENFILE;
2133                 }
2134         } else {
2135                 /* use first free */
2136                 for(i=base;i<end;i++)
2137                         if (NULL == video_device[i])
2138                                 break;
2139                 if (i == end) {
2140                         mutex_unlock(&videodev_lock);
2141                         return -ENFILE;
2142                 }
2143         }
2144         video_device[i]=vfd;
2145         vfd->minor=i;
2146
2147         ret = get_index(vfd, index);
2148         vfd->index = ret;
2149
2150         mutex_unlock(&videodev_lock);
2151
2152         if (ret < 0) {
2153                 printk(KERN_ERR "%s: get_index failed\n", __func__);
2154                 goto fail_minor;
2155         }
2156
2157         mutex_init(&vfd->lock);
2158
2159         /* sysfs class */
2160         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
2161         vfd->class_dev.class       = &video_class;
2162         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
2163         if (vfd->dev)
2164                 vfd->class_dev.parent = vfd->dev;
2165         sprintf(vfd->class_dev.bus_id, "%s%d", name_base, i - base);
2166         ret = device_register(&vfd->class_dev);
2167         if (ret < 0) {
2168                 printk(KERN_ERR "%s: device_register failed\n", __func__);
2169                 goto fail_minor;
2170         }
2171
2172 #if 1
2173         /* needed until all drivers are fixed */
2174         if (!vfd->release)
2175                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
2176                        "Please fix your driver for proper sysfs support, see "
2177                        "http://lwn.net/Articles/36850/\n", vfd->name);
2178 #endif
2179         return 0;
2180
2181 fail_minor:
2182         mutex_lock(&videodev_lock);
2183         video_device[vfd->minor] = NULL;
2184         vfd->minor = -1;
2185         mutex_unlock(&videodev_lock);
2186         return ret;
2187 }
2188 EXPORT_SYMBOL(video_register_device_index);
2189
2190 /**
2191  *      video_unregister_device - unregister a video4linux device
2192  *      @vfd: the device to unregister
2193  *
2194  *      This unregisters the passed device and deassigns the minor
2195  *      number. Future open calls will be met with errors.
2196  */
2197
2198 void video_unregister_device(struct video_device *vfd)
2199 {
2200         mutex_lock(&videodev_lock);
2201         if(video_device[vfd->minor]!=vfd)
2202                 panic("videodev: bad unregister");
2203
2204         video_device[vfd->minor]=NULL;
2205         device_unregister(&vfd->class_dev);
2206         mutex_unlock(&videodev_lock);
2207 }
2208 EXPORT_SYMBOL(video_unregister_device);
2209
2210 /*
2211  * Video fs operations
2212  */
2213 static const struct file_operations video_fops=
2214 {
2215         .owner          = THIS_MODULE,
2216         .llseek         = no_llseek,
2217         .open           = video_open,
2218 };
2219
2220 /*
2221  *      Initialise video for linux
2222  */
2223
2224 static int __init videodev_init(void)
2225 {
2226         int ret;
2227
2228         printk(KERN_INFO "Linux video capture interface: v2.00\n");
2229         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
2230                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
2231                 return -EIO;
2232         }
2233
2234         ret = class_register(&video_class);
2235         if (ret < 0) {
2236                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2237                 printk(KERN_WARNING "video_dev: class_register failed\n");
2238                 return -EIO;
2239         }
2240
2241         return 0;
2242 }
2243
2244 static void __exit videodev_exit(void)
2245 {
2246         class_unregister(&video_class);
2247         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
2248 }
2249
2250 module_init(videodev_init)
2251 module_exit(videodev_exit)
2252
2253 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
2254 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
2255 MODULE_LICENSE("GPL");
2256
2257
2258 /*
2259  * Local variables:
2260  * c-basic-offset: 8
2261  * End:
2262  */