git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/v4l2-ioctl.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@redhat.com> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/types.h>
  17 #include <linux/kernel.h>
  18
  19 #define __OLD_VIDIOC_ /* To allow fixing old calls */
  20 #include <linux/videodev2.h>
  21
  22 #ifdef CONFIG_VIDEO_V4L1
  23 #include <linux/videodev.h>
  24 #endif
  25 #include <media/v4l2-common.h>
  26 #include <media/v4l2-ioctl.h>
  27 #include <linux/video_decoder.h>
  28
  29 #define dbgarg(cmd, fmt, arg...) \
  30                 do {                                                    \
  31                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {            \
  32                         printk(KERN_DEBUG "%s: ",  vfd->name);          \
  33                         v4l_printk_ioctl(cmd);                          \
  34                         printk(" " fmt,  ## arg);                       \
  35                     }                                                   \
  36                 } while (0)
  37
  38 #define dbgarg2(fmt, arg...) \
  39                 do {                                                    \
  40                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  41                         printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
  42                 } while (0)
  43
  44 struct std_descr {
  45         v4l2_std_id std;
  46         const char *descr;
  47 };
  48
  49 static const struct std_descr standards[] = {
  50         { V4L2_STD_NTSC,        "NTSC"      },
  51         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  52         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  53         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  54         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  55         { V4L2_STD_PAL,         "PAL"       },
  56         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  57         { V4L2_STD_PAL_B,       "PAL-B"     },
  58         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  59         { V4L2_STD_PAL_G,       "PAL-G"     },
  60         { V4L2_STD_PAL_H,       "PAL-H"     },
  61         { V4L2_STD_PAL_I,       "PAL-I"     },
  62         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  63         { V4L2_STD_PAL_D,       "PAL-D"     },
  64         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  65         { V4L2_STD_PAL_K,       "PAL-K"     },
  66         { V4L2_STD_PAL_M,       "PAL-M"     },
  67         { V4L2_STD_PAL_N,       "PAL-N"     },
  68         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  69         { V4L2_STD_PAL_60,      "PAL-60"    },
  70         { V4L2_STD_SECAM,       "SECAM"     },
  71         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  72         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  73         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  74         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  75         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  76         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  77         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  78         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  79         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  80         { 0,                    "Unknown"   }
  81 };
  82
  83 /* video4linux standard ID conversion to standard name
  84  */
  85 const char *v4l2_norm_to_name(v4l2_std_id id)
  86 {
  87         u32 myid = id;
  88         int i;
  89
  90         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  91            64 bit comparations. So, on that architecture, with some gcc
  92            variants, compilation fails. Currently, the max value is 30bit wide.
  93          */
  94         BUG_ON(myid != id);
  95
  96         for (i = 0; standards[i].std; i++)
  97                 if (myid == standards[i].std)
  98                         break;
  99         return standards[i].descr;
 100 }
 101 EXPORT_SYMBOL(v4l2_norm_to_name);
 102
 103 /* Fill in the fields of a v4l2_standard structure according to the
 104    'id' and 'transmission' parameters.  Returns negative on error.  */
 105 int v4l2_video_std_construct(struct v4l2_standard *vs,
 106                              int id, const char *name)
 107 {
 108         u32 index = vs->index;
 109
 110         memset(vs, 0, sizeof(struct v4l2_standard));
 111         vs->index = index;
 112         vs->id    = id;
 113         if (id & V4L2_STD_525_60) {
 114                 vs->frameperiod.numerator = 1001;
 115                 vs->frameperiod.denominator = 30000;
 116                 vs->framelines = 525;
 117         } else {
 118                 vs->frameperiod.numerator = 1;
 119                 vs->frameperiod.denominator = 25;
 120                 vs->framelines = 625;
 121         }
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 146         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 147         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 148         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 149         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 150         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 151         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 153 };
 154 EXPORT_SYMBOL(v4l2_type_names);
 155
 156 static const char *v4l2_memory_names[] = {
 157         [V4L2_MEMORY_MMAP]    = "mmap",
 158         [V4L2_MEMORY_USERPTR] = "userptr",
 159         [V4L2_MEMORY_OVERLAY] = "overlay",
 160 };
 161
 162 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 163                            arr[a] : "unknown")
 164
 165 /* ------------------------------------------------------------------ */
 166 /* debug help functions                                               */
 167
 168 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 169 static const char *v4l1_ioctls[] = {
 170         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
 171         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
 172         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
 173         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
 174         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
 175         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
 176         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
 177         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
 178         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
 179         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
 180         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
 181         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
 182         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
 183         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
 184         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
 185         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
 186         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
 187         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
 188         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
 189         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
 190         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
 191         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
 192         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
 193         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
 194         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
 195         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
 196         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
 197         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
 198         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
 199 };
 200 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
 201 #endif
 202
 203 static const char *v4l2_ioctls[] = {
 204         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 205         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 206         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 207         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 208         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 209         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 210         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 211         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 212         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 213         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 214         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 215         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 216         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 217         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 218         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 219         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 220         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 221         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 222         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 223         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 224         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 225         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 226         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 227         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 228         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 229         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 230         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 231         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 232         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 233         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 234         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 235         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 236         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 237         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 238         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 239         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 240         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 241         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 242         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 243         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 244         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 245         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 246         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 247         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 248         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 249         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 250         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 251         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 252         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 253         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 254         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 255         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 256         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 257         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 258         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 259 #if 1
 260         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 261         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 262         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 263         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 264         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 265
 266         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 267         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 268
 269         [_IOC_NR(VIDIOC_G_CHIP_IDENT)]     = "VIDIOC_G_CHIP_IDENT",
 270         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 271 #endif
 272 };
 273 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 274
 275 static const char *v4l2_int_ioctls[] = {
 276 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 277         [_IOC_NR(DECODER_GET_CAPABILITIES)]    = "DECODER_GET_CAPABILITIES",
 278         [_IOC_NR(DECODER_GET_STATUS)]          = "DECODER_GET_STATUS",
 279         [_IOC_NR(DECODER_SET_NORM)]            = "DECODER_SET_NORM",
 280         [_IOC_NR(DECODER_SET_INPUT)]           = "DECODER_SET_INPUT",
 281         [_IOC_NR(DECODER_SET_OUTPUT)]          = "DECODER_SET_OUTPUT",
 282         [_IOC_NR(DECODER_ENABLE_OUTPUT)]       = "DECODER_ENABLE_OUTPUT",
 283         [_IOC_NR(DECODER_SET_PICTURE)]         = "DECODER_SET_PICTURE",
 284         [_IOC_NR(DECODER_SET_GPIO)]            = "DECODER_SET_GPIO",
 285         [_IOC_NR(DECODER_INIT)]                = "DECODER_INIT",
 286         [_IOC_NR(DECODER_SET_VBI_BYPASS)]      = "DECODER_SET_VBI_BYPASS",
 287         [_IOC_NR(DECODER_DUMP)]                = "DECODER_DUMP",
 288 #endif
 289         [_IOC_NR(AUDC_SET_RADIO)]              = "AUDC_SET_RADIO",
 290
 291         [_IOC_NR(TUNER_SET_TYPE_ADDR)]         = "TUNER_SET_TYPE_ADDR",
 292         [_IOC_NR(TUNER_SET_STANDBY)]           = "TUNER_SET_STANDBY",
 293         [_IOC_NR(TUNER_SET_CONFIG)]            = "TUNER_SET_CONFIG",
 294
 295         [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)]     = "VIDIOC_INT_S_TUNER_MODE",
 296         [_IOC_NR(VIDIOC_INT_RESET)]            = "VIDIOC_INT_RESET",
 297         [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
 298         [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)]  = "VIDIOC_INT_DECODE_VBI_LINE",
 299         [_IOC_NR(VIDIOC_INT_S_VBI_DATA)]       = "VIDIOC_INT_S_VBI_DATA",
 300         [_IOC_NR(VIDIOC_INT_G_VBI_DATA)]       = "VIDIOC_INT_G_VBI_DATA",
 301         [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)]   = "VIDIOC_INT_I2S_CLOCK_FREQ",
 302         [_IOC_NR(VIDIOC_INT_S_STANDBY)]        = "VIDIOC_INT_S_STANDBY",
 303         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
 304         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
 305         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
 306         [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
 307         [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ",
 308         [_IOC_NR(VIDIOC_INT_INIT)]             = "VIDIOC_INT_INIT",
 309         [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)]     = "VIDIOC_INT_G_STD_OUTPUT",
 310         [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)]     = "VIDIOC_INT_S_STD_OUTPUT",
 311 };
 312 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 313
 314 /* Common ioctl debug function. This function can be used by
 315    external ioctl messages as well as internal V4L ioctl */
 316 void v4l_printk_ioctl(unsigned int cmd)
 317 {
 318         char *dir, *type;
 319
 320         switch (_IOC_TYPE(cmd)) {
 321         case 'd':
 322                 if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
 323                         type = "v4l2_int";
 324                         break;
 325                 }
 326                 printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
 327                 return;
 328 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 329         case 'v':
 330                 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
 331                         type = "v4l1";
 332                         break;
 333                 }
 334                 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
 335                 return;
 336 #endif
 337         case 'V':
 338                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
 339                         type = "v4l2";
 340                         break;
 341                 }
 342                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
 343                 return;
 344         default:
 345                 type = "unknown";
 346         }
 347
 348         switch (_IOC_DIR(cmd)) {
 349         case _IOC_NONE:              dir = "--"; break;
 350         case _IOC_READ:              dir = "r-"; break;
 351         case _IOC_WRITE:             dir = "-w"; break;
 352         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 353         default:                     dir = "*ERR*"; break;
 354         }
 355         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
 356                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 357 }
 358 EXPORT_SYMBOL(v4l_printk_ioctl);
 359
 360 /*
 361  * helper function -- handles userspace copying for ioctl arguments
 362  */
 363
 364 #ifdef __OLD_VIDIOC_
 365 static unsigned int
 366 video_fix_command(unsigned int cmd)
 367 {
 368         switch (cmd) {
 369         case VIDIOC_OVERLAY_OLD:
 370                 cmd = VIDIOC_OVERLAY;
 371                 break;
 372         case VIDIOC_S_PARM_OLD:
 373                 cmd = VIDIOC_S_PARM;
 374                 break;
 375         case VIDIOC_S_CTRL_OLD:
 376                 cmd = VIDIOC_S_CTRL;
 377                 break;
 378         case VIDIOC_G_AUDIO_OLD:
 379                 cmd = VIDIOC_G_AUDIO;
 380                 break;
 381         case VIDIOC_G_AUDOUT_OLD:
 382                 cmd = VIDIOC_G_AUDOUT;
 383                 break;
 384         case VIDIOC_CROPCAP_OLD:
 385                 cmd = VIDIOC_CROPCAP;
 386                 break;
 387         }
 388         return cmd;
 389 }
 390 #endif
 391
 392 /*
 393  * Obsolete usercopy function - Should be removed soon
 394  */
 395 int
 396 video_usercopy(struct inode *inode, struct file *file,
 397                unsigned int cmd, unsigned long arg,
 398                int (*func)(struct inode *inode, struct file *file,
 399                            unsigned int cmd, void *arg))
 400 {
 401         char    sbuf[128];
 402         void    *mbuf = NULL;
 403         void    *parg = NULL;
 404         int     err  = -EINVAL;
 405         int     is_ext_ctrl;
 406         size_t  ctrls_size = 0;
 407         void __user *user_ptr = NULL;
 408
 409 #ifdef __OLD_VIDIOC_
 410         cmd = video_fix_command(cmd);
 411 #endif
 412         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 413                        cmd == VIDIOC_TRY_EXT_CTRLS);
 414
 415         /*  Copy arguments into temp kernel buffer  */
 416         switch (_IOC_DIR(cmd)) {
 417         case _IOC_NONE:
 418                 parg = NULL;
 419                 break;
 420         case _IOC_READ:
 421         case _IOC_WRITE:
 422         case (_IOC_WRITE | _IOC_READ):
 423                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 424                         parg = sbuf;
 425                 } else {
 426                         /* too big to allocate from stack */
 427                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
 428                         if (NULL == mbuf)
 429                                 return -ENOMEM;
 430                         parg = mbuf;
 431                 }
 432
 433                 err = -EFAULT;
 434                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 435                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 436                                 goto out;
 437                 break;
 438         }
 439         if (is_ext_ctrl) {
 440                 struct v4l2_ext_controls *p = parg;
 441
 442                 /* In case of an error, tell the caller that it wasn't
 443                    a specific control that caused it. */
 444                 p->error_idx = p->count;
 445                 user_ptr = (void __user *)p->controls;
 446                 if (p->count) {
 447                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 448                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 449                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 450                         err = -ENOMEM;
 451                         if (NULL == mbuf)
 452                                 goto out_ext_ctrl;
 453                         err = -EFAULT;
 454                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 455                                 goto out_ext_ctrl;
 456                         p->controls = mbuf;
 457                 }
 458         }
 459
 460         /* call driver */
 461         err = func(inode, file, cmd, parg);
 462         if (err == -ENOIOCTLCMD)
 463                 err = -EINVAL;
 464         if (is_ext_ctrl) {
 465                 struct v4l2_ext_controls *p = parg;
 466
 467                 p->controls = (void *)user_ptr;
 468                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 469                         err = -EFAULT;
 470                 goto out_ext_ctrl;
 471         }
 472         if (err < 0)
 473                 goto out;
 474
 475 out_ext_ctrl:
 476         /*  Copy results into user buffer  */
 477         switch (_IOC_DIR(cmd)) {
 478         case _IOC_READ:
 479         case (_IOC_WRITE | _IOC_READ):
 480                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 481                         err = -EFAULT;
 482                 break;
 483         }
 484
 485 out:
 486         kfree(mbuf);
 487         return err;
 488 }
 489 EXPORT_SYMBOL(video_usercopy);
 490
 491 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 492                                         struct v4l2_buffer *p)
 493 {
 494         struct v4l2_timecode *tc = &p->timecode;
 495
 496         dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 497                 "bytesused=%d, flags=0x%08d, "
 498                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 499                         p->timestamp.tv_sec / 3600,
 500                         (int)(p->timestamp.tv_sec / 60) % 60,
 501                         (int)(p->timestamp.tv_sec % 60),
 502                         (long)p->timestamp.tv_usec,
 503                         p->index,
 504                         prt_names(p->type, v4l2_type_names),
 505                         p->bytesused, p->flags,
 506                         p->field, p->sequence,
 507                         prt_names(p->memory, v4l2_memory_names),
 508                         p->m.userptr, p->length);
 509         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
 510                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 511                         tc->hours, tc->minutes, tc->seconds,
 512                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 513 }
 514
 515 static inline void dbgrect(struct video_device *vfd, char *s,
 516                                                         struct v4l2_rect *r)
 517 {
 518         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
 519                                                 r->width, r->height);
 520 };
 521
 522 static inline void v4l_print_pix_fmt(struct video_device *vfd,
 523                                                 struct v4l2_pix_format *fmt)
 524 {
 525         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 526                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 527                 fmt->width, fmt->height,
 528                 (fmt->pixelformat & 0xff),
 529                 (fmt->pixelformat >>  8) & 0xff,
 530                 (fmt->pixelformat >> 16) & 0xff,
 531                 (fmt->pixelformat >> 24) & 0xff,
 532                 prt_names(fmt->field, v4l2_field_names),
 533                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 534 };
 535
 536 static inline void v4l_print_ext_ctrls(unsigned int cmd,
 537         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
 538 {
 539         __u32 i;
 540
 541         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
 542                 return;
 543         dbgarg(cmd, "");
 544         printk(KERN_CONT "class=0x%x", c->ctrl_class);
 545         for (i = 0; i < c->count; i++) {
 546                 if (show_vals)
 547                         printk(KERN_CONT " id/val=0x%x/0x%x",
 548                                 c->controls[i].id, c->controls[i].value);
 549                 else
 550                         printk(KERN_CONT " id=0x%x", c->controls[i].id);
 551         }
 552         printk(KERN_CONT "\n");
 553 };
 554
 555 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 556 {
 557         __u32 i;
 558
 559         /* zero the reserved fields */
 560         c->reserved[0] = c->reserved[1] = 0;
 561         for (i = 0; i < c->count; i++) {
 562                 c->controls[i].reserved2[0] = 0;
 563                 c->controls[i].reserved2[1] = 0;
 564         }
 565         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 566            when using extended controls.
 567            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 568            is it allowed for backwards compatibility.
 569          */
 570         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 571                 return 0;
 572         /* Check that all controls are from the same control class. */
 573         for (i = 0; i < c->count; i++) {
 574                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 575                         c->error_idx = i;
 576                         return 0;
 577                 }
 578         }
 579         return 1;
 580 }
 581
 582 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 583 {
 584         if (ops == NULL)
 585                 return -EINVAL;
 586
 587         switch (type) {
 588         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 589                 if (ops->vidioc_try_fmt_vid_cap)
 590                         return 0;
 591                 break;
 592         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 593                 if (ops->vidioc_try_fmt_vid_overlay)
 594                         return 0;
 595                 break;
 596         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 597                 if (ops->vidioc_try_fmt_vid_out)
 598                         return 0;
 599                 break;
 600         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 601                 if (ops->vidioc_try_fmt_vid_out_overlay)
 602                         return 0;
 603                 break;
 604         case V4L2_BUF_TYPE_VBI_CAPTURE:
 605                 if (ops->vidioc_try_fmt_vbi_cap)
 606                         return 0;
 607                 break;
 608         case V4L2_BUF_TYPE_VBI_OUTPUT:
 609                 if (ops->vidioc_try_fmt_vbi_out)
 610                         return 0;
 611                 break;
 612         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 613                 if (ops->vidioc_try_fmt_sliced_vbi_cap)
 614                         return 0;
 615                 break;
 616         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 617                 if (ops->vidioc_try_fmt_sliced_vbi_out)
 618                         return 0;
 619                 break;
 620         case V4L2_BUF_TYPE_PRIVATE:
 621                 if (ops->vidioc_try_fmt_type_private)
 622                         return 0;
 623                 break;
 624         }
 625         return -EINVAL;
 626 }
 627
 628 static int __video_do_ioctl(struct file *file,
 629                 unsigned int cmd, void *arg)
 630 {
 631         struct video_device *vfd = video_devdata(file);
 632         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 633         void *fh = file->private_data;
 634         int ret = -EINVAL;
 635
 636         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 637                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 638                 v4l_print_ioctl(vfd->name, cmd);
 639                 printk(KERN_CONT "\n");
 640         }
 641
 642         if (ops == NULL) {
 643                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
 644                                 vfd->name);
 645                 return -EINVAL;
 646         }
 647
 648 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 649         /***********************************************************
 650          Handles calls to the obsoleted V4L1 API
 651          Due to the nature of VIDIOCGMBUF, each driver that supports
 652          V4L1 should implement its own handler for this ioctl.
 653          ***********************************************************/
 654
 655         /* --- streaming capture ------------------------------------- */
 656         if (cmd == VIDIOCGMBUF) {
 657                 struct video_mbuf *p = arg;
 658
 659                 memset(p, 0, sizeof(*p));
 660
 661                 if (!ops->vidiocgmbuf)
 662                         return ret;
 663                 ret = ops->vidiocgmbuf(file, fh, p);
 664                 if (!ret)
 665                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 666                                                 p->size, p->frames,
 667                                                 (unsigned long)p->offsets);
 668                 return ret;
 669         }
 670
 671         /********************************************************
 672          All other V4L1 calls are handled by v4l1_compat module.
 673          Those calls will be translated into V4L2 calls, and
 674          __video_do_ioctl will be called again, with one or more
 675          V4L2 ioctls.
 676          ********************************************************/
 677         if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
 678                 return v4l_compat_translate_ioctl(file, cmd, arg,
 679                                                 __video_do_ioctl);
 680 #endif
 681
 682         switch (cmd) {
 683         /* --- capabilities ------------------------------------------ */
 684         case VIDIOC_QUERYCAP:
 685         {
 686                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 687                 memset(cap, 0, sizeof(*cap));
 688
 689                 if (!ops->vidioc_querycap)
 690                         break;
 691
 692                 ret = ops->vidioc_querycap(file, fh, cap);
 693                 if (!ret)
 694                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 695                                         "version=0x%08x, "
 696                                         "capabilities=0x%08x\n",
 697                                         cap->driver, cap->card, cap->bus_info,
 698                                         cap->version,
 699                                         cap->capabilities);
 700                 break;
 701         }
 702
 703         /* --- priority ------------------------------------------ */
 704         case VIDIOC_G_PRIORITY:
 705         {
 706                 enum v4l2_priority *p = arg;
 707
 708                 if (!ops->vidioc_g_priority)
 709                         break;
 710                 ret = ops->vidioc_g_priority(file, fh, p);
 711                 if (!ret)
 712                         dbgarg(cmd, "priority is %d\n", *p);
 713                 break;
 714         }
 715         case VIDIOC_S_PRIORITY:
 716         {
 717                 enum v4l2_priority *p = arg;
 718
 719                 if (!ops->vidioc_s_priority)
 720                         break;
 721                 dbgarg(cmd, "setting priority to %d\n", *p);
 722                 ret = ops->vidioc_s_priority(file, fh, *p);
 723                 break;
 724         }
 725
 726         /* --- capture ioctls ---------------------------------------- */
 727         case VIDIOC_ENUM_FMT:
 728         {
 729                 struct v4l2_fmtdesc *f = arg;
 730                 enum v4l2_buf_type type;
 731                 unsigned int index;
 732
 733                 index = f->index;
 734                 type  = f->type;
 735                 memset(f, 0, sizeof(*f));
 736                 f->index = index;
 737                 f->type  = type;
 738
 739                 switch (type) {
 740                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 741                         if (ops->vidioc_enum_fmt_vid_cap)
 742                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
 743                         break;
 744                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 745                         if (ops->vidioc_enum_fmt_vid_overlay)
 746                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
 747                                         fh, f);
 748                         break;
 749                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 750                         if (ops->vidioc_enum_fmt_vid_out)
 751                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
 752                         break;
 753                 case V4L2_BUF_TYPE_PRIVATE:
 754                         if (ops->vidioc_enum_fmt_type_private)
 755                                 ret = ops->vidioc_enum_fmt_type_private(file,
 756                                                                 fh, f);
 757                         break;
 758                 default:
 759                         break;
 760                 }
 761                 if (!ret)
 762                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 763                                 "pixelformat=%c%c%c%c, description='%s'\n",
 764                                 f->index, f->type, f->flags,
 765                                 (f->pixelformat & 0xff),
 766                                 (f->pixelformat >>  8) & 0xff,
 767                                 (f->pixelformat >> 16) & 0xff,
 768                                 (f->pixelformat >> 24) & 0xff,
 769                                 f->description);
 770                 break;
 771         }
 772         case VIDIOC_G_FMT:
 773         {
 774                 struct v4l2_format *f = (struct v4l2_format *)arg;
 775
 776                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
 777
 778                 /* FIXME: Should be one dump per type */
 779                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 780
 781                 switch (f->type) {
 782                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 783                         if (ops->vidioc_g_fmt_vid_cap)
 784                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
 785                         if (!ret)
 786                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 787                         break;
 788                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 789                         if (ops->vidioc_g_fmt_vid_overlay)
 790                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
 791                                                                     fh, f);
 792                         break;
 793                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 794                         if (ops->vidioc_g_fmt_vid_out)
 795                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
 796                         if (!ret)
 797                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 798                         break;
 799                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 800                         if (ops->vidioc_g_fmt_vid_out_overlay)
 801                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
 802                                        fh, f);
 803                         break;
 804                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 805                         if (ops->vidioc_g_fmt_vbi_cap)
 806                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
 807                         break;
 808                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 809                         if (ops->vidioc_g_fmt_vbi_out)
 810                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
 811                         break;
 812                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 813                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
 814                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
 815                                                                         fh, f);
 816                         break;
 817                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 818                         if (ops->vidioc_g_fmt_sliced_vbi_out)
 819                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
 820                                                                         fh, f);
 821                         break;
 822                 case V4L2_BUF_TYPE_PRIVATE:
 823                         if (ops->vidioc_g_fmt_type_private)
 824                                 ret = ops->vidioc_g_fmt_type_private(file,
 825                                                                 fh, f);
 826                         break;
 827                 }
 828
 829                 break;
 830         }
 831         case VIDIOC_S_FMT:
 832         {
 833                 struct v4l2_format *f = (struct v4l2_format *)arg;
 834
 835                 /* FIXME: Should be one dump per type */
 836                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 837
 838                 switch (f->type) {
 839                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 840                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 841                         if (ops->vidioc_s_fmt_vid_cap)
 842                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
 843                         break;
 844                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 845                         if (ops->vidioc_s_fmt_vid_overlay)
 846                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
 847                                                                     fh, f);
 848                         break;
 849                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 850                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 851                         if (ops->vidioc_s_fmt_vid_out)
 852                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
 853                         break;
 854                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 855                         if (ops->vidioc_s_fmt_vid_out_overlay)
 856                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
 857                                         fh, f);
 858                         break;
 859                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 860                         if (ops->vidioc_s_fmt_vbi_cap)
 861                                 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
 862                         break;
 863                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 864                         if (ops->vidioc_s_fmt_vbi_out)
 865                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
 866                         break;
 867                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 868                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
 869                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
 870                                                                         fh, f);
 871                         break;
 872                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 873                         if (ops->vidioc_s_fmt_sliced_vbi_out)
 874                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
 875                                                                         fh, f);
 876                         break;
 877                 case V4L2_BUF_TYPE_PRIVATE:
 878                         if (ops->vidioc_s_fmt_type_private)
 879                                 ret = ops->vidioc_s_fmt_type_private(file,
 880                                                                 fh, f);
 881                         break;
 882                 }
 883                 break;
 884         }
 885         case VIDIOC_TRY_FMT:
 886         {
 887                 struct v4l2_format *f = (struct v4l2_format *)arg;
 888
 889                 /* FIXME: Should be one dump per type */
 890                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 891                                                 v4l2_type_names));
 892                 switch (f->type) {
 893                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 894                         if (ops->vidioc_try_fmt_vid_cap)
 895                                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
 896                         if (!ret)
 897                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 898                         break;
 899                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 900                         if (ops->vidioc_try_fmt_vid_overlay)
 901                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
 902                                         fh, f);
 903                         break;
 904                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 905                         if (ops->vidioc_try_fmt_vid_out)
 906                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
 907                         if (!ret)
 908                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 909                         break;
 910                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 911                         if (ops->vidioc_try_fmt_vid_out_overlay)
 912                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
 913                                        fh, f);
 914                         break;
 915                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 916                         if (ops->vidioc_try_fmt_vbi_cap)
 917                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
 918                         break;
 919                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 920                         if (ops->vidioc_try_fmt_vbi_out)
 921                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
 922                         break;
 923                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 924                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
 925                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
 926                                                                 fh, f);
 927                         break;
 928                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 929                         if (ops->vidioc_try_fmt_sliced_vbi_out)
 930                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
 931                                                                 fh, f);
 932                         break;
 933                 case V4L2_BUF_TYPE_PRIVATE:
 934                         if (ops->vidioc_try_fmt_type_private)
 935                                 ret = ops->vidioc_try_fmt_type_private(file,
 936                                                                 fh, f);
 937                         break;
 938                 }
 939
 940                 break;
 941         }
 942         /* FIXME: Those buf reqs could be handled here,
 943            with some changes on videobuf to allow its header to be included at
 944            videodev2.h or being merged at videodev2.
 945          */
 946         case VIDIOC_REQBUFS:
 947         {
 948                 struct v4l2_requestbuffers *p = arg;
 949
 950                 if (!ops->vidioc_reqbufs)
 951                         break;
 952                 ret = check_fmt(ops, p->type);
 953                 if (ret)
 954                         break;
 955
 956                 ret = ops->vidioc_reqbufs(file, fh, p);
 957                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
 958                                 p->count,
 959                                 prt_names(p->type, v4l2_type_names),
 960                                 prt_names(p->memory, v4l2_memory_names));
 961                 break;
 962         }
 963         case VIDIOC_QUERYBUF:
 964         {
 965                 struct v4l2_buffer *p = arg;
 966
 967                 if (!ops->vidioc_querybuf)
 968                         break;
 969                 ret = check_fmt(ops, p->type);
 970                 if (ret)
 971                         break;
 972
 973                 ret = ops->vidioc_querybuf(file, fh, p);
 974                 if (!ret)
 975                         dbgbuf(cmd, vfd, p);
 976                 break;
 977         }
 978         case VIDIOC_QBUF:
 979         {
 980                 struct v4l2_buffer *p = arg;
 981
 982                 if (!ops->vidioc_qbuf)
 983                         break;
 984                 ret = check_fmt(ops, p->type);
 985                 if (ret)
 986                         break;
 987
 988                 ret = ops->vidioc_qbuf(file, fh, p);
 989                 if (!ret)
 990                         dbgbuf(cmd, vfd, p);
 991                 break;
 992         }
 993         case VIDIOC_DQBUF:
 994         {
 995                 struct v4l2_buffer *p = arg;
 996
 997                 if (!ops->vidioc_dqbuf)
 998                         break;
 999                 ret = check_fmt(ops, p->type);
1000                 if (ret)
1001                         break;
1002
1003                 ret = ops->vidioc_dqbuf(file, fh, p);
1004                 if (!ret)
1005                         dbgbuf(cmd, vfd, p);
1006                 break;
1007         }
1008         case VIDIOC_OVERLAY:
1009         {
1010                 int *i = arg;
1011
1012                 if (!ops->vidioc_overlay)
1013                         break;
1014                 dbgarg(cmd, "value=%d\n", *i);
1015                 ret = ops->vidioc_overlay(file, fh, *i);
1016                 break;
1017         }
1018         case VIDIOC_G_FBUF:
1019         {
1020                 struct v4l2_framebuffer *p = arg;
1021
1022                 if (!ops->vidioc_g_fbuf)
1023                         break;
1024                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1025                 if (!ret) {
1026                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1027                                         p->capability, p->flags,
1028                                         (unsigned long)p->base);
1029                         v4l_print_pix_fmt(vfd, &p->fmt);
1030                 }
1031                 break;
1032         }
1033         case VIDIOC_S_FBUF:
1034         {
1035                 struct v4l2_framebuffer *p = arg;
1036
1037                 if (!ops->vidioc_s_fbuf)
1038                         break;
1039                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1040                         p->capability, p->flags, (unsigned long)p->base);
1041                 v4l_print_pix_fmt(vfd, &p->fmt);
1042                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1043                 break;
1044         }
1045         case VIDIOC_STREAMON:
1046         {
1047                 enum v4l2_buf_type i = *(int *)arg;
1048
1049                 if (!ops->vidioc_streamon)
1050                         break;
1051                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1052                 ret = ops->vidioc_streamon(file, fh, i);
1053                 break;
1054         }
1055         case VIDIOC_STREAMOFF:
1056         {
1057                 enum v4l2_buf_type i = *(int *)arg;
1058
1059                 if (!ops->vidioc_streamoff)
1060                         break;
1061                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1062                 ret = ops->vidioc_streamoff(file, fh, i);
1063                 break;
1064         }
1065         /* ---------- tv norms ---------- */
1066         case VIDIOC_ENUMSTD:
1067         {
1068                 struct v4l2_standard *p = arg;
1069                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1070                 unsigned int index = p->index, i, j = 0;
1071                 const char *descr = "";
1072
1073                 /* Return norm array in a canonical way */
1074                 for (i = 0; i <= index && id; i++) {
1075                         /* last std value in the standards array is 0, so this
1076                            while always ends there since (id & 0) == 0. */
1077                         while ((id & standards[j].std) != standards[j].std)
1078                                 j++;
1079                         curr_id = standards[j].std;
1080                         descr = standards[j].descr;
1081                         j++;
1082                         if (curr_id == 0)
1083                                 break;
1084                         if (curr_id != V4L2_STD_PAL &&
1085                             curr_id != V4L2_STD_SECAM &&
1086                             curr_id != V4L2_STD_NTSC)
1087                                 id &= ~curr_id;
1088                 }
1089                 if (i <= index)
1090                         return -EINVAL;
1091
1092                 v4l2_video_std_construct(p, curr_id, descr);
1093                 p->index = index;
1094
1095                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1096                                 "framelines=%d\n", p->index,
1097                                 (unsigned long long)p->id, p->name,
1098                                 p->frameperiod.numerator,
1099                                 p->frameperiod.denominator,
1100                                 p->framelines);
1101
1102                 ret = 0;
1103                 break;
1104         }
1105         case VIDIOC_G_STD:
1106         {
1107                 v4l2_std_id *id = arg;
1108
1109                 ret = 0;
1110                 /* Calls the specific handler */
1111                 if (ops->vidioc_g_std)
1112                         ret = ops->vidioc_g_std(file, fh, id);
1113                 else
1114                         *id = vfd->current_norm;
1115
1116                 if (!ret)
1117                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1118                 break;
1119         }
1120         case VIDIOC_S_STD:
1121         {
1122                 v4l2_std_id *id = arg, norm;
1123
1124                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1125
1126                 norm = (*id) & vfd->tvnorms;
1127                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1128                         break;
1129
1130                 /* Calls the specific handler */
1131                 if (ops->vidioc_s_std)
1132                         ret = ops->vidioc_s_std(file, fh, &norm);
1133                 else
1134                         ret = -EINVAL;
1135
1136                 /* Updates standard information */
1137                 if (ret >= 0)
1138                         vfd->current_norm = norm;
1139                 break;
1140         }
1141         case VIDIOC_QUERYSTD:
1142         {
1143                 v4l2_std_id *p = arg;
1144
1145                 if (!ops->vidioc_querystd)
1146                         break;
1147                 ret = ops->vidioc_querystd(file, fh, arg);
1148                 if (!ret)
1149                         dbgarg(cmd, "detected std=%08Lx\n",
1150                                                 (unsigned long long)*p);
1151                 break;
1152         }
1153         /* ------ input switching ---------- */
1154         /* FIXME: Inputs can be handled inside videodev2 */
1155         case VIDIOC_ENUMINPUT:
1156         {
1157                 struct v4l2_input *p = arg;
1158                 int i = p->index;
1159
1160                 if (!ops->vidioc_enum_input)
1161                         break;
1162                 memset(p, 0, sizeof(*p));
1163                 p->index = i;
1164
1165                 ret = ops->vidioc_enum_input(file, fh, p);
1166                 if (!ret)
1167                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1168                                 "audioset=%d, "
1169                                 "tuner=%d, std=%08Lx, status=%d\n",
1170                                 p->index, p->name, p->type, p->audioset,
1171                                 p->tuner,
1172                                 (unsigned long long)p->std,
1173                                 p->status);
1174                 break;
1175         }
1176         case VIDIOC_G_INPUT:
1177         {
1178                 unsigned int *i = arg;
1179
1180                 if (!ops->vidioc_g_input)
1181                         break;
1182                 ret = ops->vidioc_g_input(file, fh, i);
1183                 if (!ret)
1184                         dbgarg(cmd, "value=%d\n", *i);
1185                 break;
1186         }
1187         case VIDIOC_S_INPUT:
1188         {
1189                 unsigned int *i = arg;
1190
1191                 if (!ops->vidioc_s_input)
1192                         break;
1193                 dbgarg(cmd, "value=%d\n", *i);
1194                 ret = ops->vidioc_s_input(file, fh, *i);
1195                 break;
1196         }
1197
1198         /* ------ output switching ---------- */
1199         case VIDIOC_ENUMOUTPUT:
1200         {
1201                 struct v4l2_output *p = arg;
1202                 int i = p->index;
1203
1204                 if (!ops->vidioc_enum_output)
1205                         break;
1206                 memset(p, 0, sizeof(*p));
1207                 p->index = i;
1208
1209                 ret = ops->vidioc_enum_output(file, fh, p);
1210                 if (!ret)
1211                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1212                                 "audioset=0x%x, "
1213                                 "modulator=%d, std=0x%08Lx\n",
1214                                 p->index, p->name, p->type, p->audioset,
1215                                 p->modulator, (unsigned long long)p->std);
1216                 break;
1217         }
1218         case VIDIOC_G_OUTPUT:
1219         {
1220                 unsigned int *i = arg;
1221
1222                 if (!ops->vidioc_g_output)
1223                         break;
1224                 ret = ops->vidioc_g_output(file, fh, i);
1225                 if (!ret)
1226                         dbgarg(cmd, "value=%d\n", *i);
1227                 break;
1228         }
1229         case VIDIOC_S_OUTPUT:
1230         {
1231                 unsigned int *i = arg;
1232
1233                 if (!ops->vidioc_s_output)
1234                         break;
1235                 dbgarg(cmd, "value=%d\n", *i);
1236                 ret = ops->vidioc_s_output(file, fh, *i);
1237                 break;
1238         }
1239
1240         /* --- controls ---------------------------------------------- */
1241         case VIDIOC_QUERYCTRL:
1242         {
1243                 struct v4l2_queryctrl *p = arg;
1244
1245                 if (!ops->vidioc_queryctrl)
1246                         break;
1247                 ret = ops->vidioc_queryctrl(file, fh, p);
1248                 if (!ret)
1249                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1250                                         "step=%d, default=%d, flags=0x%08x\n",
1251                                         p->id, p->type, p->name,
1252                                         p->minimum, p->maximum,
1253                                         p->step, p->default_value, p->flags);
1254                 else
1255                         dbgarg(cmd, "id=0x%x\n", p->id);
1256                 break;
1257         }
1258         case VIDIOC_G_CTRL:
1259         {
1260                 struct v4l2_control *p = arg;
1261
1262                 if (ops->vidioc_g_ctrl)
1263                         ret = ops->vidioc_g_ctrl(file, fh, p);
1264                 else if (ops->vidioc_g_ext_ctrls) {
1265                         struct v4l2_ext_controls ctrls;
1266                         struct v4l2_ext_control ctrl;
1267
1268                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1269                         ctrls.count = 1;
1270                         ctrls.controls = &ctrl;
1271                         ctrl.id = p->id;
1272                         ctrl.value = p->value;
1273                         if (check_ext_ctrls(&ctrls, 1)) {
1274                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1275                                 if (ret == 0)
1276                                         p->value = ctrl.value;
1277                         }
1278                 } else
1279                         break;
1280                 if (!ret)
1281                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1282                 else
1283                         dbgarg(cmd, "id=0x%x\n", p->id);
1284                 break;
1285         }
1286         case VIDIOC_S_CTRL:
1287         {
1288                 struct v4l2_control *p = arg;
1289                 struct v4l2_ext_controls ctrls;
1290                 struct v4l2_ext_control ctrl;
1291
1292                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1293                         break;
1294
1295                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1296
1297                 if (ops->vidioc_s_ctrl) {
1298                         ret = ops->vidioc_s_ctrl(file, fh, p);
1299                         break;
1300                 }
1301                 if (!ops->vidioc_s_ext_ctrls)
1302                         break;
1303
1304                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1305                 ctrls.count = 1;
1306                 ctrls.controls = &ctrl;
1307                 ctrl.id = p->id;
1308                 ctrl.value = p->value;
1309                 if (check_ext_ctrls(&ctrls, 1))
1310                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1311                 break;
1312         }
1313         case VIDIOC_G_EXT_CTRLS:
1314         {
1315                 struct v4l2_ext_controls *p = arg;
1316
1317                 p->error_idx = p->count;
1318                 if (!ops->vidioc_g_ext_ctrls)
1319                         break;
1320                 if (check_ext_ctrls(p, 0))
1321                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1322                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1323                 break;
1324         }
1325         case VIDIOC_S_EXT_CTRLS:
1326         {
1327                 struct v4l2_ext_controls *p = arg;
1328
1329                 p->error_idx = p->count;
1330                 if (!ops->vidioc_s_ext_ctrls)
1331                         break;
1332                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1333                 if (check_ext_ctrls(p, 0))
1334                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1335                 break;
1336         }
1337         case VIDIOC_TRY_EXT_CTRLS:
1338         {
1339                 struct v4l2_ext_controls *p = arg;
1340
1341                 p->error_idx = p->count;
1342                 if (!ops->vidioc_try_ext_ctrls)
1343                         break;
1344                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1345                 if (check_ext_ctrls(p, 0))
1346                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1347                 break;
1348         }
1349         case VIDIOC_QUERYMENU:
1350         {
1351                 struct v4l2_querymenu *p = arg;
1352
1353                 if (!ops->vidioc_querymenu)
1354                         break;
1355                 ret = ops->vidioc_querymenu(file, fh, p);
1356                 if (!ret)
1357                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1358                                 p->id, p->index, p->name);
1359                 else
1360                         dbgarg(cmd, "id=0x%x, index=%d\n",
1361                                 p->id, p->index);
1362                 break;
1363         }
1364         /* --- audio ---------------------------------------------- */
1365         case VIDIOC_ENUMAUDIO:
1366         {
1367                 struct v4l2_audio *p = arg;
1368
1369                 if (!ops->vidioc_enumaudio)
1370                         break;
1371                 ret = ops->vidioc_enumaudio(file, fh, p);
1372                 if (!ret)
1373                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1374                                         "mode=0x%x\n", p->index, p->name,
1375                                         p->capability, p->mode);
1376                 else
1377                         dbgarg(cmd, "index=%d\n", p->index);
1378                 break;
1379         }
1380         case VIDIOC_G_AUDIO:
1381         {
1382                 struct v4l2_audio *p = arg;
1383                 __u32 index = p->index;
1384
1385                 if (!ops->vidioc_g_audio)
1386                         break;
1387
1388                 memset(p, 0, sizeof(*p));
1389                 p->index = index;
1390                 ret = ops->vidioc_g_audio(file, fh, p);
1391                 if (!ret)
1392                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1393                                         "mode=0x%x\n", p->index,
1394                                         p->name, p->capability, p->mode);
1395                 else
1396                         dbgarg(cmd, "index=%d\n", p->index);
1397                 break;
1398         }
1399         case VIDIOC_S_AUDIO:
1400         {
1401                 struct v4l2_audio *p = arg;
1402
1403                 if (!ops->vidioc_s_audio)
1404                         break;
1405                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1406                                         "mode=0x%x\n", p->index, p->name,
1407                                         p->capability, p->mode);
1408                 ret = ops->vidioc_s_audio(file, fh, p);
1409                 break;
1410         }
1411         case VIDIOC_ENUMAUDOUT:
1412         {
1413                 struct v4l2_audioout *p = arg;
1414
1415                 if (!ops->vidioc_enumaudout)
1416                         break;
1417                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1418                 ret = ops->vidioc_enumaudout(file, fh, p);
1419                 if (!ret)
1420                         dbgarg2("index=%d, name=%s, capability=%d, "
1421                                         "mode=%d\n", p->index, p->name,
1422                                         p->capability, p->mode);
1423                 break;
1424         }
1425         case VIDIOC_G_AUDOUT:
1426         {
1427                 struct v4l2_audioout *p = arg;
1428
1429                 if (!ops->vidioc_g_audout)
1430                         break;
1431                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1432                 ret = ops->vidioc_g_audout(file, fh, p);
1433                 if (!ret)
1434                         dbgarg2("index=%d, name=%s, capability=%d, "
1435                                         "mode=%d\n", p->index, p->name,
1436                                         p->capability, p->mode);
1437                 break;
1438         }
1439         case VIDIOC_S_AUDOUT:
1440         {
1441                 struct v4l2_audioout *p = arg;
1442
1443                 if (!ops->vidioc_s_audout)
1444                         break;
1445                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1446                                         "mode=%d\n", p->index, p->name,
1447                                         p->capability, p->mode);
1448
1449                 ret = ops->vidioc_s_audout(file, fh, p);
1450                 break;
1451         }
1452         case VIDIOC_G_MODULATOR:
1453         {
1454                 struct v4l2_modulator *p = arg;
1455
1456                 if (!ops->vidioc_g_modulator)
1457                         break;
1458                 ret = ops->vidioc_g_modulator(file, fh, p);
1459                 if (!ret)
1460                         dbgarg(cmd, "index=%d, name=%s, "
1461                                         "capability=%d, rangelow=%d,"
1462                                         " rangehigh=%d, txsubchans=%d\n",
1463                                         p->index, p->name, p->capability,
1464                                         p->rangelow, p->rangehigh,
1465                                         p->txsubchans);
1466                 break;
1467         }
1468         case VIDIOC_S_MODULATOR:
1469         {
1470                 struct v4l2_modulator *p = arg;
1471
1472                 if (!ops->vidioc_s_modulator)
1473                         break;
1474                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1475                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1476                                 p->index, p->name, p->capability, p->rangelow,
1477                                 p->rangehigh, p->txsubchans);
1478                         ret = ops->vidioc_s_modulator(file, fh, p);
1479                 break;
1480         }
1481         case VIDIOC_G_CROP:
1482         {
1483                 struct v4l2_crop *p = arg;
1484
1485                 if (!ops->vidioc_g_crop)
1486                         break;
1487                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1488                 ret = ops->vidioc_g_crop(file, fh, p);
1489                 if (!ret)
1490                         dbgrect(vfd, "", &p->c);
1491                 break;
1492         }
1493         case VIDIOC_S_CROP:
1494         {
1495                 struct v4l2_crop *p = arg;
1496
1497                 if (!ops->vidioc_s_crop)
1498                         break;
1499                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1500                 dbgrect(vfd, "", &p->c);
1501                 ret = ops->vidioc_s_crop(file, fh, p);
1502                 break;
1503         }
1504         case VIDIOC_CROPCAP:
1505         {
1506                 struct v4l2_cropcap *p = arg;
1507
1508                 /*FIXME: Should also show v4l2_fract pixelaspect */
1509                 if (!ops->vidioc_cropcap)
1510                         break;
1511                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1512                 ret = ops->vidioc_cropcap(file, fh, p);
1513                 if (!ret) {
1514                         dbgrect(vfd, "bounds ", &p->bounds);
1515                         dbgrect(vfd, "defrect ", &p->defrect);
1516                 }
1517                 break;
1518         }
1519         case VIDIOC_G_JPEGCOMP:
1520         {
1521                 struct v4l2_jpegcompression *p = arg;
1522
1523                 if (!ops->vidioc_g_jpegcomp)
1524                         break;
1525                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1526                 if (!ret)
1527                         dbgarg(cmd, "quality=%d, APPn=%d, "
1528                                         "APP_len=%d, COM_len=%d, "
1529                                         "jpeg_markers=%d\n",
1530                                         p->quality, p->APPn, p->APP_len,
1531                                         p->COM_len, p->jpeg_markers);
1532                 break;
1533         }
1534         case VIDIOC_S_JPEGCOMP:
1535         {
1536                 struct v4l2_jpegcompression *p = arg;
1537
1538                 if (!ops->vidioc_g_jpegcomp)
1539                         break;
1540                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1541                                         "COM_len=%d, jpeg_markers=%d\n",
1542                                         p->quality, p->APPn, p->APP_len,
1543                                         p->COM_len, p->jpeg_markers);
1544                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1545                 break;
1546         }
1547         case VIDIOC_G_ENC_INDEX:
1548         {
1549                 struct v4l2_enc_idx *p = arg;
1550
1551                 if (!ops->vidioc_g_enc_index)
1552                         break;
1553                 ret = ops->vidioc_g_enc_index(file, fh, p);
1554                 if (!ret)
1555                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1556                                         p->entries, p->entries_cap);
1557                 break;
1558         }
1559         case VIDIOC_ENCODER_CMD:
1560         {
1561                 struct v4l2_encoder_cmd *p = arg;
1562
1563                 if (!ops->vidioc_encoder_cmd)
1564                         break;
1565                 memset(&p->raw, 0, sizeof(p->raw));
1566                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1567                 if (!ret)
1568                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1569                 break;
1570         }
1571         case VIDIOC_TRY_ENCODER_CMD:
1572         {
1573                 struct v4l2_encoder_cmd *p = arg;
1574
1575                 if (!ops->vidioc_try_encoder_cmd)
1576                         break;
1577                 memset(&p->raw, 0, sizeof(p->raw));
1578                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1579                 if (!ret)
1580                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1581                 break;
1582         }
1583         case VIDIOC_G_PARM:
1584         {
1585                 struct v4l2_streamparm *p = arg;
1586                 __u32 type = p->type;
1587
1588                 memset(p, 0, sizeof(*p));
1589                 p->type = type;
1590
1591                 if (ops->vidioc_g_parm) {
1592                         ret = ops->vidioc_g_parm(file, fh, p);
1593                 } else {
1594                         struct v4l2_standard s;
1595
1596                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1597                                 return -EINVAL;
1598
1599                         v4l2_video_std_construct(&s, vfd->current_norm,
1600                                                  v4l2_norm_to_name(vfd->current_norm));
1601
1602                         p->parm.capture.timeperframe = s.frameperiod;
1603                         ret = 0;
1604                 }
1605
1606                 dbgarg(cmd, "type=%d\n", p->type);
1607                 break;
1608         }
1609         case VIDIOC_S_PARM:
1610         {
1611                 struct v4l2_streamparm *p = arg;
1612
1613                 if (!ops->vidioc_s_parm)
1614                         break;
1615                 dbgarg(cmd, "type=%d\n", p->type);
1616                 ret = ops->vidioc_s_parm(file, fh, p);
1617                 break;
1618         }
1619         case VIDIOC_G_TUNER:
1620         {
1621                 struct v4l2_tuner *p = arg;
1622                 __u32 index = p->index;
1623
1624                 if (!ops->vidioc_g_tuner)
1625                         break;
1626
1627                 memset(p, 0, sizeof(*p));
1628                 p->index = index;
1629
1630                 ret = ops->vidioc_g_tuner(file, fh, p);
1631                 if (!ret)
1632                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1633                                         "capability=0x%x, rangelow=%d, "
1634                                         "rangehigh=%d, signal=%d, afc=%d, "
1635                                         "rxsubchans=0x%x, audmode=%d\n",
1636                                         p->index, p->name, p->type,
1637                                         p->capability, p->rangelow,
1638                                         p->rangehigh, p->signal, p->afc,
1639                                         p->rxsubchans, p->audmode);
1640                 break;
1641         }
1642         case VIDIOC_S_TUNER:
1643         {
1644                 struct v4l2_tuner *p = arg;
1645
1646                 if (!ops->vidioc_s_tuner)
1647                         break;
1648                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1649                                 "capability=0x%x, rangelow=%d, "
1650                                 "rangehigh=%d, signal=%d, afc=%d, "
1651                                 "rxsubchans=0x%x, audmode=%d\n",
1652                                 p->index, p->name, p->type,
1653                                 p->capability, p->rangelow,
1654                                 p->rangehigh, p->signal, p->afc,
1655                                 p->rxsubchans, p->audmode);
1656                 ret = ops->vidioc_s_tuner(file, fh, p);
1657                 break;
1658         }
1659         case VIDIOC_G_FREQUENCY:
1660         {
1661                 struct v4l2_frequency *p = arg;
1662
1663                 if (!ops->vidioc_g_frequency)
1664                         break;
1665
1666                 memset(p->reserved, 0, sizeof(p->reserved));
1667
1668                 ret = ops->vidioc_g_frequency(file, fh, p);
1669                 if (!ret)
1670                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1671                                         p->tuner, p->type, p->frequency);
1672                 break;
1673         }
1674         case VIDIOC_S_FREQUENCY:
1675         {
1676                 struct v4l2_frequency *p = arg;
1677
1678                 if (!ops->vidioc_s_frequency)
1679                         break;
1680                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1681                                 p->tuner, p->type, p->frequency);
1682                 ret = ops->vidioc_s_frequency(file, fh, p);
1683                 break;
1684         }
1685         case VIDIOC_G_SLICED_VBI_CAP:
1686         {
1687                 struct v4l2_sliced_vbi_cap *p = arg;
1688                 __u32 type = p->type;
1689
1690                 if (!ops->vidioc_g_sliced_vbi_cap)
1691                         break;
1692                 memset(p, 0, sizeof(*p));
1693                 p->type = type;
1694                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1695                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1696                 if (!ret)
1697                         dbgarg2("service_set=%d\n", p->service_set);
1698                 break;
1699         }
1700         case VIDIOC_LOG_STATUS:
1701         {
1702                 if (!ops->vidioc_log_status)
1703                         break;
1704                 ret = ops->vidioc_log_status(file, fh);
1705                 break;
1706         }
1707 #ifdef CONFIG_VIDEO_ADV_DEBUG
1708         case VIDIOC_DBG_G_REGISTER:
1709         {
1710                 struct v4l2_register *p = arg;
1711
1712                 if (!capable(CAP_SYS_ADMIN))
1713                         ret = -EPERM;
1714                 else if (ops->vidioc_g_register)
1715                         ret = ops->vidioc_g_register(file, fh, p);
1716                 break;
1717         }
1718         case VIDIOC_DBG_S_REGISTER:
1719         {
1720                 struct v4l2_register *p = arg;
1721
1722                 if (!capable(CAP_SYS_ADMIN))
1723                         ret = -EPERM;
1724                 else if (ops->vidioc_s_register)
1725                         ret = ops->vidioc_s_register(file, fh, p);
1726                 break;
1727         }
1728 #endif
1729         case VIDIOC_G_CHIP_IDENT:
1730         {
1731                 struct v4l2_chip_ident *p = arg;
1732
1733                 if (!ops->vidioc_g_chip_ident)
1734                         break;
1735                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1736                 if (!ret)
1737                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1738                 break;
1739         }
1740         case VIDIOC_S_HW_FREQ_SEEK:
1741         {
1742                 struct v4l2_hw_freq_seek *p = arg;
1743
1744                 if (!ops->vidioc_s_hw_freq_seek)
1745                         break;
1746                 dbgarg(cmd,
1747                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1748                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1749                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1750                 break;
1751         }
1752         default:
1753         {
1754                 if (!ops->vidioc_default)
1755                         break;
1756                 ret = ops->vidioc_default(file, fh, cmd, arg);
1757                 break;
1758         }
1759         } /* switch */
1760
1761         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1762                 if (ret < 0) {
1763                         v4l_print_ioctl(vfd->name, cmd);
1764                         printk(KERN_CONT " error %d\n", ret);
1765                 }
1766         }
1767
1768         return ret;
1769 }
1770
1771 int __video_ioctl2(struct file *file,
1772                unsigned int cmd, unsigned long arg)
1773 {
1774         char    sbuf[128];
1775         void    *mbuf = NULL;
1776         void    *parg = NULL;
1777         int     err  = -EINVAL;
1778         int     is_ext_ctrl;
1779         size_t  ctrls_size = 0;
1780         void __user *user_ptr = NULL;
1781
1782 #ifdef __OLD_VIDIOC_
1783         cmd = video_fix_command(cmd);
1784 #endif
1785         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1786                        cmd == VIDIOC_TRY_EXT_CTRLS);
1787
1788         /*  Copy arguments into temp kernel buffer  */
1789         switch (_IOC_DIR(cmd)) {
1790         case _IOC_NONE:
1791                 parg = NULL;
1792                 break;
1793         case _IOC_READ:
1794         case _IOC_WRITE:
1795         case (_IOC_WRITE | _IOC_READ):
1796                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1797                         parg = sbuf;
1798                 } else {
1799                         /* too big to allocate from stack */
1800                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1801                         if (NULL == mbuf)
1802                                 return -ENOMEM;
1803                         parg = mbuf;
1804                 }
1805
1806                 err = -EFAULT;
1807                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1808                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1809                                 goto out;
1810                 break;
1811         }
1812
1813         if (is_ext_ctrl) {
1814                 struct v4l2_ext_controls *p = parg;
1815
1816                 /* In case of an error, tell the caller that it wasn't
1817                    a specific control that caused it. */
1818                 p->error_idx = p->count;
1819                 user_ptr = (void __user *)p->controls;
1820                 if (p->count) {
1821                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1822                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1823                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1824                         err = -ENOMEM;
1825                         if (NULL == mbuf)
1826                                 goto out_ext_ctrl;
1827                         err = -EFAULT;
1828                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1829                                 goto out_ext_ctrl;
1830                         p->controls = mbuf;
1831                 }
1832         }
1833
1834         /* Handles IOCTL */
1835         err = __video_do_ioctl(file, cmd, parg);
1836         if (err == -ENOIOCTLCMD)
1837                 err = -EINVAL;
1838         if (is_ext_ctrl) {
1839                 struct v4l2_ext_controls *p = parg;
1840
1841                 p->controls = (void *)user_ptr;
1842                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1843                         err = -EFAULT;
1844                 goto out_ext_ctrl;
1845         }
1846         if (err < 0)
1847                 goto out;
1848
1849 out_ext_ctrl:
1850         /*  Copy results into user buffer  */
1851         switch (_IOC_DIR(cmd)) {
1852         case _IOC_READ:
1853         case (_IOC_WRITE | _IOC_READ):
1854                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1855                         err = -EFAULT;
1856                 break;
1857         }
1858
1859 out:
1860         kfree(mbuf);
1861         return err;
1862 }
1863 EXPORT_SYMBOL(__video_ioctl2);
1864
1865 int video_ioctl2(struct inode *inode, struct file *file,
1866                unsigned int cmd, unsigned long arg)
1867 {
1868         return __video_ioctl2(file, cmd, arg);
1869 }
1870 EXPORT_SYMBOL(video_ioctl2);