drivers/media/video/videodev.c

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