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@lxorguk.ukuu.org.uk> (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_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_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 long
 396 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 397                 v4l2_kioctl func)
 398 {
 399         char    sbuf[128];
 400         void    *mbuf = NULL;
 401         void    *parg = NULL;
 402         long    err  = -EINVAL;
 403         int     is_ext_ctrl;
 404         size_t  ctrls_size = 0;
 405         void __user *user_ptr = NULL;
 406
 407 #ifdef __OLD_VIDIOC_
 408         cmd = video_fix_command(cmd);
 409 #endif
 410         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 411                        cmd == VIDIOC_TRY_EXT_CTRLS);
 412
 413         /*  Copy arguments into temp kernel buffer  */
 414         switch (_IOC_DIR(cmd)) {
 415         case _IOC_NONE:
 416                 parg = NULL;
 417                 break;
 418         case _IOC_READ:
 419         case _IOC_WRITE:
 420         case (_IOC_WRITE | _IOC_READ):
 421                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 422                         parg = sbuf;
 423                 } else {
 424                         /* too big to allocate from stack */
 425                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
 426                         if (NULL == mbuf)
 427                                 return -ENOMEM;
 428                         parg = mbuf;
 429                 }
 430
 431                 err = -EFAULT;
 432                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 433                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 434                                 goto out;
 435                 break;
 436         }
 437         if (is_ext_ctrl) {
 438                 struct v4l2_ext_controls *p = parg;
 439
 440                 /* In case of an error, tell the caller that it wasn't
 441                    a specific control that caused it. */
 442                 p->error_idx = p->count;
 443                 user_ptr = (void __user *)p->controls;
 444                 if (p->count) {
 445                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 446                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 447                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 448                         err = -ENOMEM;
 449                         if (NULL == mbuf)
 450                                 goto out_ext_ctrl;
 451                         err = -EFAULT;
 452                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 453                                 goto out_ext_ctrl;
 454                         p->controls = mbuf;
 455                 }
 456         }
 457
 458         /* call driver */
 459         err = func(file, cmd, parg);
 460         if (err == -ENOIOCTLCMD)
 461                 err = -EINVAL;
 462         if (is_ext_ctrl) {
 463                 struct v4l2_ext_controls *p = parg;
 464
 465                 p->controls = (void *)user_ptr;
 466                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 467                         err = -EFAULT;
 468                 goto out_ext_ctrl;
 469         }
 470         if (err < 0)
 471                 goto out;
 472
 473 out_ext_ctrl:
 474         /*  Copy results into user buffer  */
 475         switch (_IOC_DIR(cmd)) {
 476         case _IOC_READ:
 477         case (_IOC_WRITE | _IOC_READ):
 478                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 479                         err = -EFAULT;
 480                 break;
 481         }
 482
 483 out:
 484         kfree(mbuf);
 485         return err;
 486 }
 487 EXPORT_SYMBOL(video_usercopy);
 488
 489 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 490                                         struct v4l2_buffer *p)
 491 {
 492         struct v4l2_timecode *tc = &p->timecode;
 493
 494         dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 495                 "bytesused=%d, flags=0x%08d, "
 496                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 497                         p->timestamp.tv_sec / 3600,
 498                         (int)(p->timestamp.tv_sec / 60) % 60,
 499                         (int)(p->timestamp.tv_sec % 60),
 500                         (long)p->timestamp.tv_usec,
 501                         p->index,
 502                         prt_names(p->type, v4l2_type_names),
 503                         p->bytesused, p->flags,
 504                         p->field, p->sequence,
 505                         prt_names(p->memory, v4l2_memory_names),
 506                         p->m.userptr, p->length);
 507         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
 508                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 509                         tc->hours, tc->minutes, tc->seconds,
 510                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 511 }
 512
 513 static inline void dbgrect(struct video_device *vfd, char *s,
 514                                                         struct v4l2_rect *r)
 515 {
 516         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
 517                                                 r->width, r->height);
 518 };
 519
 520 static inline void v4l_print_pix_fmt(struct video_device *vfd,
 521                                                 struct v4l2_pix_format *fmt)
 522 {
 523         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 524                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 525                 fmt->width, fmt->height,
 526                 (fmt->pixelformat & 0xff),
 527                 (fmt->pixelformat >>  8) & 0xff,
 528                 (fmt->pixelformat >> 16) & 0xff,
 529                 (fmt->pixelformat >> 24) & 0xff,
 530                 prt_names(fmt->field, v4l2_field_names),
 531                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 532 };
 533
 534 static inline void v4l_print_ext_ctrls(unsigned int cmd,
 535         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
 536 {
 537         __u32 i;
 538
 539         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
 540                 return;
 541         dbgarg(cmd, "");
 542         printk(KERN_CONT "class=0x%x", c->ctrl_class);
 543         for (i = 0; i < c->count; i++) {
 544                 if (show_vals)
 545                         printk(KERN_CONT " id/val=0x%x/0x%x",
 546                                 c->controls[i].id, c->controls[i].value);
 547                 else
 548                         printk(KERN_CONT " id=0x%x", c->controls[i].id);
 549         }
 550         printk(KERN_CONT "\n");
 551 };
 552
 553 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 554 {
 555         __u32 i;
 556
 557         /* zero the reserved fields */
 558         c->reserved[0] = c->reserved[1] = 0;
 559         for (i = 0; i < c->count; i++) {
 560                 c->controls[i].reserved2[0] = 0;
 561                 c->controls[i].reserved2[1] = 0;
 562         }
 563         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 564            when using extended controls.
 565            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 566            is it allowed for backwards compatibility.
 567          */
 568         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 569                 return 0;
 570         /* Check that all controls are from the same control class. */
 571         for (i = 0; i < c->count; i++) {
 572                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 573                         c->error_idx = i;
 574                         return 0;
 575                 }
 576         }
 577         return 1;
 578 }
 579
 580 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 581 {
 582         if (ops == NULL)
 583                 return -EINVAL;
 584
 585         switch (type) {
 586         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 587                 if (ops->vidioc_try_fmt_vid_cap)
 588                         return 0;
 589                 break;
 590         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 591                 if (ops->vidioc_try_fmt_vid_overlay)
 592                         return 0;
 593                 break;
 594         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 595                 if (ops->vidioc_try_fmt_vid_out)
 596                         return 0;
 597                 break;
 598         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 599                 if (ops->vidioc_try_fmt_vid_out_overlay)
 600                         return 0;
 601                 break;
 602         case V4L2_BUF_TYPE_VBI_CAPTURE:
 603                 if (ops->vidioc_try_fmt_vbi_cap)
 604                         return 0;
 605                 break;
 606         case V4L2_BUF_TYPE_VBI_OUTPUT:
 607                 if (ops->vidioc_try_fmt_vbi_out)
 608                         return 0;
 609                 break;
 610         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 611                 if (ops->vidioc_try_fmt_sliced_vbi_cap)
 612                         return 0;
 613                 break;
 614         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 615                 if (ops->vidioc_try_fmt_sliced_vbi_out)
 616                         return 0;
 617                 break;
 618         case V4L2_BUF_TYPE_PRIVATE:
 619                 if (ops->vidioc_try_fmt_type_private)
 620                         return 0;
 621                 break;
 622         }
 623         return -EINVAL;
 624 }
 625
 626 static long __video_do_ioctl(struct file *file,
 627                 unsigned int cmd, void *arg)
 628 {
 629         struct video_device *vfd = video_devdata(file);
 630         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 631         void *fh = file->private_data;
 632         long ret = -EINVAL;
 633
 634         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 635                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 636                 v4l_print_ioctl(vfd->name, cmd);
 637                 printk(KERN_CONT "\n");
 638         }
 639
 640         if (ops == NULL) {
 641                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
 642                                 vfd->name);
 643                 return -EINVAL;
 644         }
 645
 646 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 647         /***********************************************************
 648          Handles calls to the obsoleted V4L1 API
 649          Due to the nature of VIDIOCGMBUF, each driver that supports
 650          V4L1 should implement its own handler for this ioctl.
 651          ***********************************************************/
 652
 653         /* --- streaming capture ------------------------------------- */
 654         if (cmd == VIDIOCGMBUF) {
 655                 struct video_mbuf *p = arg;
 656
 657                 memset(p, 0, sizeof(*p));
 658
 659                 if (!ops->vidiocgmbuf)
 660                         return ret;
 661                 ret = ops->vidiocgmbuf(file, fh, p);
 662                 if (!ret)
 663                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 664                                                 p->size, p->frames,
 665                                                 (unsigned long)p->offsets);
 666                 return ret;
 667         }
 668
 669         /********************************************************
 670          All other V4L1 calls are handled by v4l1_compat module.
 671          Those calls will be translated into V4L2 calls, and
 672          __video_do_ioctl will be called again, with one or more
 673          V4L2 ioctls.
 674          ********************************************************/
 675         if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
 676                 return v4l_compat_translate_ioctl(file, cmd, arg,
 677                                                 __video_do_ioctl);
 678 #endif
 679
 680         switch (cmd) {
 681         /* --- capabilities ------------------------------------------ */
 682         case VIDIOC_QUERYCAP:
 683         {
 684                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 685                 memset(cap, 0, sizeof(*cap));
 686
 687                 if (!ops->vidioc_querycap)
 688                         break;
 689
 690                 ret = ops->vidioc_querycap(file, fh, cap);
 691                 if (!ret)
 692                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 693                                         "version=0x%08x, "
 694                                         "capabilities=0x%08x\n",
 695                                         cap->driver, cap->card, cap->bus_info,
 696                                         cap->version,
 697                                         cap->capabilities);
 698                 break;
 699         }
 700
 701         /* --- priority ------------------------------------------ */
 702         case VIDIOC_G_PRIORITY:
 703         {
 704                 enum v4l2_priority *p = arg;
 705
 706                 if (!ops->vidioc_g_priority)
 707                         break;
 708                 ret = ops->vidioc_g_priority(file, fh, p);
 709                 if (!ret)
 710                         dbgarg(cmd, "priority is %d\n", *p);
 711                 break;
 712         }
 713         case VIDIOC_S_PRIORITY:
 714         {
 715                 enum v4l2_priority *p = arg;
 716
 717                 if (!ops->vidioc_s_priority)
 718                         break;
 719                 dbgarg(cmd, "setting priority to %d\n", *p);
 720                 ret = ops->vidioc_s_priority(file, fh, *p);
 721                 break;
 722         }
 723
 724         /* --- capture ioctls ---------------------------------------- */
 725         case VIDIOC_ENUM_FMT:
 726         {
 727                 struct v4l2_fmtdesc *f = arg;
 728                 enum v4l2_buf_type type;
 729                 unsigned int index;
 730
 731                 index = f->index;
 732                 type  = f->type;
 733                 memset(f, 0, sizeof(*f));
 734                 f->index = index;
 735                 f->type  = type;
 736
 737                 switch (type) {
 738                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 739                         if (ops->vidioc_enum_fmt_vid_cap)
 740                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
 741                         break;
 742                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 743                         if (ops->vidioc_enum_fmt_vid_overlay)
 744                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
 745                                         fh, f);
 746                         break;
 747                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 748                         if (ops->vidioc_enum_fmt_vid_out)
 749                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
 750                         break;
 751                 case V4L2_BUF_TYPE_PRIVATE:
 752                         if (ops->vidioc_enum_fmt_type_private)
 753                                 ret = ops->vidioc_enum_fmt_type_private(file,
 754                                                                 fh, f);
 755                         break;
 756                 default:
 757                         break;
 758                 }
 759                 if (!ret)
 760                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 761                                 "pixelformat=%c%c%c%c, description='%s'\n",
 762                                 f->index, f->type, f->flags,
 763                                 (f->pixelformat & 0xff),
 764                                 (f->pixelformat >>  8) & 0xff,
 765                                 (f->pixelformat >> 16) & 0xff,
 766                                 (f->pixelformat >> 24) & 0xff,
 767                                 f->description);
 768                 break;
 769         }
 770         case VIDIOC_G_FMT:
 771         {
 772                 struct v4l2_format *f = (struct v4l2_format *)arg;
 773
 774                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
 775
 776                 /* FIXME: Should be one dump per type */
 777                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 778
 779                 switch (f->type) {
 780                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 781                         if (ops->vidioc_g_fmt_vid_cap)
 782                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
 783                         if (!ret)
 784                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 785                         break;
 786                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 787                         if (ops->vidioc_g_fmt_vid_overlay)
 788                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
 789                                                                     fh, f);
 790                         break;
 791                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 792                         if (ops->vidioc_g_fmt_vid_out)
 793                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
 794                         if (!ret)
 795                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 796                         break;
 797                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 798                         if (ops->vidioc_g_fmt_vid_out_overlay)
 799                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
 800                                        fh, f);
 801                         break;
 802                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 803                         if (ops->vidioc_g_fmt_vbi_cap)
 804                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
 805                         break;
 806                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 807                         if (ops->vidioc_g_fmt_vbi_out)
 808                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
 809                         break;
 810                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 811                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
 812                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
 813                                                                         fh, f);
 814                         break;
 815                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 816                         if (ops->vidioc_g_fmt_sliced_vbi_out)
 817                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
 818                                                                         fh, f);
 819                         break;
 820                 case V4L2_BUF_TYPE_PRIVATE:
 821                         if (ops->vidioc_g_fmt_type_private)
 822                                 ret = ops->vidioc_g_fmt_type_private(file,
 823                                                                 fh, f);
 824                         break;
 825                 }
 826
 827                 break;
 828         }
 829         case VIDIOC_S_FMT:
 830         {
 831                 struct v4l2_format *f = (struct v4l2_format *)arg;
 832
 833                 /* FIXME: Should be one dump per type */
 834                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 835
 836                 switch (f->type) {
 837                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 838                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 839                         if (ops->vidioc_s_fmt_vid_cap)
 840                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
 841                         break;
 842                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 843                         if (ops->vidioc_s_fmt_vid_overlay)
 844                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
 845                                                                     fh, f);
 846                         break;
 847                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 848                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 849                         if (ops->vidioc_s_fmt_vid_out)
 850                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
 851                         break;
 852                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 853                         if (ops->vidioc_s_fmt_vid_out_overlay)
 854                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
 855                                         fh, f);
 856                         break;
 857                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 858                         if (ops->vidioc_s_fmt_vbi_cap)
 859                                 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
 860                         break;
 861                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 862                         if (ops->vidioc_s_fmt_vbi_out)
 863                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
 864                         break;
 865                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 866                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
 867                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
 868                                                                         fh, f);
 869                         break;
 870                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 871                         if (ops->vidioc_s_fmt_sliced_vbi_out)
 872                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
 873                                                                         fh, f);
 874                         break;
 875                 case V4L2_BUF_TYPE_PRIVATE:
 876                         if (ops->vidioc_s_fmt_type_private)
 877                                 ret = ops->vidioc_s_fmt_type_private(file,
 878                                                                 fh, f);
 879                         break;
 880                 }
 881                 break;
 882         }
 883         case VIDIOC_TRY_FMT:
 884         {
 885                 struct v4l2_format *f = (struct v4l2_format *)arg;
 886
 887                 /* FIXME: Should be one dump per type */
 888                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 889                                                 v4l2_type_names));
 890                 switch (f->type) {
 891                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 892                         if (ops->vidioc_try_fmt_vid_cap)
 893                                 ret = ops->vidioc_try_fmt_vid_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 (ops->vidioc_try_fmt_vid_overlay)
 899                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
 900                                         fh, f);
 901                         break;
 902                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 903                         if (ops->vidioc_try_fmt_vid_out)
 904                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
 905                         if (!ret)
 906                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 907                         break;
 908                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 909                         if (ops->vidioc_try_fmt_vid_out_overlay)
 910                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
 911                                        fh, f);
 912                         break;
 913                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 914                         if (ops->vidioc_try_fmt_vbi_cap)
 915                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
 916                         break;
 917                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 918                         if (ops->vidioc_try_fmt_vbi_out)
 919                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
 920                         break;
 921                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 922                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
 923                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
 924                                                                 fh, f);
 925                         break;
 926                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 927                         if (ops->vidioc_try_fmt_sliced_vbi_out)
 928                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
 929                                                                 fh, f);
 930                         break;
 931                 case V4L2_BUF_TYPE_PRIVATE:
 932                         if (ops->vidioc_try_fmt_type_private)
 933                                 ret = ops->vidioc_try_fmt_type_private(file,
 934                                                                 fh, f);
 935                         break;
 936                 }
 937
 938                 break;
 939         }
 940         /* FIXME: Those buf reqs could be handled here,
 941            with some changes on videobuf to allow its header to be included at
 942            videodev2.h or being merged at videodev2.
 943          */
 944         case VIDIOC_REQBUFS:
 945         {
 946                 struct v4l2_requestbuffers *p = arg;
 947
 948                 if (!ops->vidioc_reqbufs)
 949                         break;
 950                 ret = check_fmt(ops, p->type);
 951                 if (ret)
 952                         break;
 953
 954                 ret = ops->vidioc_reqbufs(file, fh, p);
 955                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
 956                                 p->count,
 957                                 prt_names(p->type, v4l2_type_names),
 958                                 prt_names(p->memory, v4l2_memory_names));
 959                 break;
 960         }
 961         case VIDIOC_QUERYBUF:
 962         {
 963                 struct v4l2_buffer *p = arg;
 964
 965                 if (!ops->vidioc_querybuf)
 966                         break;
 967                 ret = check_fmt(ops, p->type);
 968                 if (ret)
 969                         break;
 970
 971                 ret = ops->vidioc_querybuf(file, fh, p);
 972                 if (!ret)
 973                         dbgbuf(cmd, vfd, p);
 974                 break;
 975         }
 976         case VIDIOC_QBUF:
 977         {
 978                 struct v4l2_buffer *p = arg;
 979
 980                 if (!ops->vidioc_qbuf)
 981                         break;
 982                 ret = check_fmt(ops, p->type);
 983                 if (ret)
 984                         break;
 985
 986                 ret = ops->vidioc_qbuf(file, fh, p);
 987                 if (!ret)
 988                         dbgbuf(cmd, vfd, p);
 989                 break;
 990         }
 991         case VIDIOC_DQBUF:
 992         {
 993                 struct v4l2_buffer *p = arg;
 994
 995                 if (!ops->vidioc_dqbuf)
 996                         break;
 997                 ret = check_fmt(ops, p->type);
 998                 if (ret)
 999                         break;
1000
1001                 ret = ops->vidioc_dqbuf(file, fh, p);
1002                 if (!ret)
1003                         dbgbuf(cmd, vfd, p);
1004                 break;
1005         }
1006         case VIDIOC_OVERLAY:
1007         {
1008                 int *i = arg;
1009
1010                 if (!ops->vidioc_overlay)
1011                         break;
1012                 dbgarg(cmd, "value=%d\n", *i);
1013                 ret = ops->vidioc_overlay(file, fh, *i);
1014                 break;
1015         }
1016         case VIDIOC_G_FBUF:
1017         {
1018                 struct v4l2_framebuffer *p = arg;
1019
1020                 if (!ops->vidioc_g_fbuf)
1021                         break;
1022                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1023                 if (!ret) {
1024                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1025                                         p->capability, p->flags,
1026                                         (unsigned long)p->base);
1027                         v4l_print_pix_fmt(vfd, &p->fmt);
1028                 }
1029                 break;
1030         }
1031         case VIDIOC_S_FBUF:
1032         {
1033                 struct v4l2_framebuffer *p = arg;
1034
1035                 if (!ops->vidioc_s_fbuf)
1036                         break;
1037                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1038                         p->capability, p->flags, (unsigned long)p->base);
1039                 v4l_print_pix_fmt(vfd, &p->fmt);
1040                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1041                 break;
1042         }
1043         case VIDIOC_STREAMON:
1044         {
1045                 enum v4l2_buf_type i = *(int *)arg;
1046
1047                 if (!ops->vidioc_streamon)
1048                         break;
1049                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1050                 ret = ops->vidioc_streamon(file, fh, i);
1051                 break;
1052         }
1053         case VIDIOC_STREAMOFF:
1054         {
1055                 enum v4l2_buf_type i = *(int *)arg;
1056
1057                 if (!ops->vidioc_streamoff)
1058                         break;
1059                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1060                 ret = ops->vidioc_streamoff(file, fh, i);
1061                 break;
1062         }
1063         /* ---------- tv norms ---------- */
1064         case VIDIOC_ENUMSTD:
1065         {
1066                 struct v4l2_standard *p = arg;
1067                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1068                 unsigned int index = p->index, i, j = 0;
1069                 const char *descr = "";
1070
1071                 /* Return norm array in a canonical way */
1072                 for (i = 0; i <= index && id; i++) {
1073                         /* last std value in the standards array is 0, so this
1074                            while always ends there since (id & 0) == 0. */
1075                         while ((id & standards[j].std) != standards[j].std)
1076                                 j++;
1077                         curr_id = standards[j].std;
1078                         descr = standards[j].descr;
1079                         j++;
1080                         if (curr_id == 0)
1081                                 break;
1082                         if (curr_id != V4L2_STD_PAL &&
1083                             curr_id != V4L2_STD_SECAM &&
1084                             curr_id != V4L2_STD_NTSC)
1085                                 id &= ~curr_id;
1086                 }
1087                 if (i <= index)
1088                         return -EINVAL;
1089
1090                 v4l2_video_std_construct(p, curr_id, descr);
1091                 p->index = index;
1092
1093                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1094                                 "framelines=%d\n", p->index,
1095                                 (unsigned long long)p->id, p->name,
1096                                 p->frameperiod.numerator,
1097                                 p->frameperiod.denominator,
1098                                 p->framelines);
1099
1100                 ret = 0;
1101                 break;
1102         }
1103         case VIDIOC_G_STD:
1104         {
1105                 v4l2_std_id *id = arg;
1106
1107                 ret = 0;
1108                 /* Calls the specific handler */
1109                 if (ops->vidioc_g_std)
1110                         ret = ops->vidioc_g_std(file, fh, id);
1111                 else
1112                         *id = vfd->current_norm;
1113
1114                 if (!ret)
1115                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1116                 break;
1117         }
1118         case VIDIOC_S_STD:
1119         {
1120                 v4l2_std_id *id = arg, norm;
1121
1122                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1123
1124                 norm = (*id) & vfd->tvnorms;
1125                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1126                         break;
1127
1128                 /* Calls the specific handler */
1129                 if (ops->vidioc_s_std)
1130                         ret = ops->vidioc_s_std(file, fh, &norm);
1131                 else
1132                         ret = -EINVAL;
1133
1134                 /* Updates standard information */
1135                 if (ret >= 0)
1136                         vfd->current_norm = norm;
1137                 break;
1138         }
1139         case VIDIOC_QUERYSTD:
1140         {
1141                 v4l2_std_id *p = arg;
1142
1143                 if (!ops->vidioc_querystd)
1144                         break;
1145                 ret = ops->vidioc_querystd(file, fh, arg);
1146                 if (!ret)
1147                         dbgarg(cmd, "detected std=%08Lx\n",
1148                                                 (unsigned long long)*p);
1149                 break;
1150         }
1151         /* ------ input switching ---------- */
1152         /* FIXME: Inputs can be handled inside videodev2 */
1153         case VIDIOC_ENUMINPUT:
1154         {
1155                 struct v4l2_input *p = arg;
1156                 int i = p->index;
1157
1158                 if (!ops->vidioc_enum_input)
1159                         break;
1160                 memset(p, 0, sizeof(*p));
1161                 p->index = i;
1162
1163                 ret = ops->vidioc_enum_input(file, fh, p);
1164                 if (!ret)
1165                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1166                                 "audioset=%d, "
1167                                 "tuner=%d, std=%08Lx, status=%d\n",
1168                                 p->index, p->name, p->type, p->audioset,
1169                                 p->tuner,
1170                                 (unsigned long long)p->std,
1171                                 p->status);
1172                 break;
1173         }
1174         case VIDIOC_G_INPUT:
1175         {
1176                 unsigned int *i = arg;
1177
1178                 if (!ops->vidioc_g_input)
1179                         break;
1180                 ret = ops->vidioc_g_input(file, fh, i);
1181                 if (!ret)
1182                         dbgarg(cmd, "value=%d\n", *i);
1183                 break;
1184         }
1185         case VIDIOC_S_INPUT:
1186         {
1187                 unsigned int *i = arg;
1188
1189                 if (!ops->vidioc_s_input)
1190                         break;
1191                 dbgarg(cmd, "value=%d\n", *i);
1192                 ret = ops->vidioc_s_input(file, fh, *i);
1193                 break;
1194         }
1195
1196         /* ------ output switching ---------- */
1197         case VIDIOC_ENUMOUTPUT:
1198         {
1199                 struct v4l2_output *p = arg;
1200                 int i = p->index;
1201
1202                 if (!ops->vidioc_enum_output)
1203                         break;
1204                 memset(p, 0, sizeof(*p));
1205                 p->index = i;
1206
1207                 ret = ops->vidioc_enum_output(file, fh, p);
1208                 if (!ret)
1209                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1210                                 "audioset=0x%x, "
1211                                 "modulator=%d, std=0x%08Lx\n",
1212                                 p->index, p->name, p->type, p->audioset,
1213                                 p->modulator, (unsigned long long)p->std);
1214                 break;
1215         }
1216         case VIDIOC_G_OUTPUT:
1217         {
1218                 unsigned int *i = arg;
1219
1220                 if (!ops->vidioc_g_output)
1221                         break;
1222                 ret = ops->vidioc_g_output(file, fh, i);
1223                 if (!ret)
1224                         dbgarg(cmd, "value=%d\n", *i);
1225                 break;
1226         }
1227         case VIDIOC_S_OUTPUT:
1228         {
1229                 unsigned int *i = arg;
1230
1231                 if (!ops->vidioc_s_output)
1232                         break;
1233                 dbgarg(cmd, "value=%d\n", *i);
1234                 ret = ops->vidioc_s_output(file, fh, *i);
1235                 break;
1236         }
1237
1238         /* --- controls ---------------------------------------------- */
1239         case VIDIOC_QUERYCTRL:
1240         {
1241                 struct v4l2_queryctrl *p = arg;
1242
1243                 if (!ops->vidioc_queryctrl)
1244                         break;
1245                 ret = ops->vidioc_queryctrl(file, fh, p);
1246                 if (!ret)
1247                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1248                                         "step=%d, default=%d, flags=0x%08x\n",
1249                                         p->id, p->type, p->name,
1250                                         p->minimum, p->maximum,
1251                                         p->step, p->default_value, p->flags);
1252                 else
1253                         dbgarg(cmd, "id=0x%x\n", p->id);
1254                 break;
1255         }
1256         case VIDIOC_G_CTRL:
1257         {
1258                 struct v4l2_control *p = arg;
1259
1260                 if (ops->vidioc_g_ctrl)
1261                         ret = ops->vidioc_g_ctrl(file, fh, p);
1262                 else if (ops->vidioc_g_ext_ctrls) {
1263                         struct v4l2_ext_controls ctrls;
1264                         struct v4l2_ext_control ctrl;
1265
1266                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1267                         ctrls.count = 1;
1268                         ctrls.controls = &ctrl;
1269                         ctrl.id = p->id;
1270                         ctrl.value = p->value;
1271                         if (check_ext_ctrls(&ctrls, 1)) {
1272                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1273                                 if (ret == 0)
1274                                         p->value = ctrl.value;
1275                         }
1276                 } else
1277                         break;
1278                 if (!ret)
1279                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1280                 else
1281                         dbgarg(cmd, "id=0x%x\n", p->id);
1282                 break;
1283         }
1284         case VIDIOC_S_CTRL:
1285         {
1286                 struct v4l2_control *p = arg;
1287                 struct v4l2_ext_controls ctrls;
1288                 struct v4l2_ext_control ctrl;
1289
1290                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1291                         break;
1292
1293                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1294
1295                 if (ops->vidioc_s_ctrl) {
1296                         ret = ops->vidioc_s_ctrl(file, fh, p);
1297                         break;
1298                 }
1299                 if (!ops->vidioc_s_ext_ctrls)
1300                         break;
1301
1302                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1303                 ctrls.count = 1;
1304                 ctrls.controls = &ctrl;
1305                 ctrl.id = p->id;
1306                 ctrl.value = p->value;
1307                 if (check_ext_ctrls(&ctrls, 1))
1308                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1309                 break;
1310         }
1311         case VIDIOC_G_EXT_CTRLS:
1312         {
1313                 struct v4l2_ext_controls *p = arg;
1314
1315                 p->error_idx = p->count;
1316                 if (!ops->vidioc_g_ext_ctrls)
1317                         break;
1318                 if (check_ext_ctrls(p, 0))
1319                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1320                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1321                 break;
1322         }
1323         case VIDIOC_S_EXT_CTRLS:
1324         {
1325                 struct v4l2_ext_controls *p = arg;
1326
1327                 p->error_idx = p->count;
1328                 if (!ops->vidioc_s_ext_ctrls)
1329                         break;
1330                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1331                 if (check_ext_ctrls(p, 0))
1332                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1333                 break;
1334         }
1335         case VIDIOC_TRY_EXT_CTRLS:
1336         {
1337                 struct v4l2_ext_controls *p = arg;
1338
1339                 p->error_idx = p->count;
1340                 if (!ops->vidioc_try_ext_ctrls)
1341                         break;
1342                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1343                 if (check_ext_ctrls(p, 0))
1344                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1345                 break;
1346         }
1347         case VIDIOC_QUERYMENU:
1348         {
1349                 struct v4l2_querymenu *p = arg;
1350
1351                 if (!ops->vidioc_querymenu)
1352                         break;
1353                 ret = ops->vidioc_querymenu(file, fh, p);
1354                 if (!ret)
1355                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1356                                 p->id, p->index, p->name);
1357                 else
1358                         dbgarg(cmd, "id=0x%x, index=%d\n",
1359                                 p->id, p->index);
1360                 break;
1361         }
1362         /* --- audio ---------------------------------------------- */
1363         case VIDIOC_ENUMAUDIO:
1364         {
1365                 struct v4l2_audio *p = arg;
1366
1367                 if (!ops->vidioc_enumaudio)
1368                         break;
1369                 ret = ops->vidioc_enumaudio(file, fh, p);
1370                 if (!ret)
1371                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1372                                         "mode=0x%x\n", p->index, p->name,
1373                                         p->capability, p->mode);
1374                 else
1375                         dbgarg(cmd, "index=%d\n", p->index);
1376                 break;
1377         }
1378         case VIDIOC_G_AUDIO:
1379         {
1380                 struct v4l2_audio *p = arg;
1381                 __u32 index = p->index;
1382
1383                 if (!ops->vidioc_g_audio)
1384                         break;
1385
1386                 memset(p, 0, sizeof(*p));
1387                 p->index = index;
1388                 ret = ops->vidioc_g_audio(file, fh, p);
1389                 if (!ret)
1390                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1391                                         "mode=0x%x\n", p->index,
1392                                         p->name, p->capability, p->mode);
1393                 else
1394                         dbgarg(cmd, "index=%d\n", p->index);
1395                 break;
1396         }
1397         case VIDIOC_S_AUDIO:
1398         {
1399                 struct v4l2_audio *p = arg;
1400
1401                 if (!ops->vidioc_s_audio)
1402                         break;
1403                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1404                                         "mode=0x%x\n", p->index, p->name,
1405                                         p->capability, p->mode);
1406                 ret = ops->vidioc_s_audio(file, fh, p);
1407                 break;
1408         }
1409         case VIDIOC_ENUMAUDOUT:
1410         {
1411                 struct v4l2_audioout *p = arg;
1412
1413                 if (!ops->vidioc_enumaudout)
1414                         break;
1415                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1416                 ret = ops->vidioc_enumaudout(file, fh, p);
1417                 if (!ret)
1418                         dbgarg2("index=%d, name=%s, capability=%d, "
1419                                         "mode=%d\n", p->index, p->name,
1420                                         p->capability, p->mode);
1421                 break;
1422         }
1423         case VIDIOC_G_AUDOUT:
1424         {
1425                 struct v4l2_audioout *p = arg;
1426
1427                 if (!ops->vidioc_g_audout)
1428                         break;
1429                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1430                 ret = ops->vidioc_g_audout(file, fh, p);
1431                 if (!ret)
1432                         dbgarg2("index=%d, name=%s, capability=%d, "
1433                                         "mode=%d\n", p->index, p->name,
1434                                         p->capability, p->mode);
1435                 break;
1436         }
1437         case VIDIOC_S_AUDOUT:
1438         {
1439                 struct v4l2_audioout *p = arg;
1440
1441                 if (!ops->vidioc_s_audout)
1442                         break;
1443                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1444                                         "mode=%d\n", p->index, p->name,
1445                                         p->capability, p->mode);
1446
1447                 ret = ops->vidioc_s_audout(file, fh, p);
1448                 break;
1449         }
1450         case VIDIOC_G_MODULATOR:
1451         {
1452                 struct v4l2_modulator *p = arg;
1453
1454                 if (!ops->vidioc_g_modulator)
1455                         break;
1456                 ret = ops->vidioc_g_modulator(file, fh, p);
1457                 if (!ret)
1458                         dbgarg(cmd, "index=%d, name=%s, "
1459                                         "capability=%d, rangelow=%d,"
1460                                         " rangehigh=%d, txsubchans=%d\n",
1461                                         p->index, p->name, p->capability,
1462                                         p->rangelow, p->rangehigh,
1463                                         p->txsubchans);
1464                 break;
1465         }
1466         case VIDIOC_S_MODULATOR:
1467         {
1468                 struct v4l2_modulator *p = arg;
1469
1470                 if (!ops->vidioc_s_modulator)
1471                         break;
1472                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1473                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1474                                 p->index, p->name, p->capability, p->rangelow,
1475                                 p->rangehigh, p->txsubchans);
1476                         ret = ops->vidioc_s_modulator(file, fh, p);
1477                 break;
1478         }
1479         case VIDIOC_G_CROP:
1480         {
1481                 struct v4l2_crop *p = arg;
1482                 __u32 type;
1483
1484                 if (!ops->vidioc_g_crop)
1485                         break;
1486
1487                 type = p->type;
1488                 memset(p, 0, sizeof(*p));
1489                 p->type = type;
1490
1491                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1492                 ret = ops->vidioc_g_crop(file, fh, p);
1493                 if (!ret)
1494                         dbgrect(vfd, "", &p->c);
1495                 break;
1496         }
1497         case VIDIOC_S_CROP:
1498         {
1499                 struct v4l2_crop *p = arg;
1500
1501                 if (!ops->vidioc_s_crop)
1502                         break;
1503                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1504                 dbgrect(vfd, "", &p->c);
1505                 ret = ops->vidioc_s_crop(file, fh, p);
1506                 break;
1507         }
1508         case VIDIOC_CROPCAP:
1509         {
1510                 struct v4l2_cropcap *p = arg;
1511                 __u32 type;
1512
1513                 /*FIXME: Should also show v4l2_fract pixelaspect */
1514                 if (!ops->vidioc_cropcap)
1515                         break;
1516
1517                 type = p->type;
1518                 memset(p, 0, sizeof(*p));
1519                 p->type = type;
1520
1521                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1522                 ret = ops->vidioc_cropcap(file, fh, p);
1523                 if (!ret) {
1524                         dbgrect(vfd, "bounds ", &p->bounds);
1525                         dbgrect(vfd, "defrect ", &p->defrect);
1526                 }
1527                 break;
1528         }
1529         case VIDIOC_G_JPEGCOMP:
1530         {
1531                 struct v4l2_jpegcompression *p = arg;
1532
1533                 if (!ops->vidioc_g_jpegcomp)
1534                         break;
1535
1536                 memset(p, 0, sizeof(*p));
1537
1538                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1539                 if (!ret)
1540                         dbgarg(cmd, "quality=%d, APPn=%d, "
1541                                         "APP_len=%d, COM_len=%d, "
1542                                         "jpeg_markers=%d\n",
1543                                         p->quality, p->APPn, p->APP_len,
1544                                         p->COM_len, p->jpeg_markers);
1545                 break;
1546         }
1547         case VIDIOC_S_JPEGCOMP:
1548         {
1549                 struct v4l2_jpegcompression *p = arg;
1550
1551                 if (!ops->vidioc_g_jpegcomp)
1552                         break;
1553                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1554                                         "COM_len=%d, jpeg_markers=%d\n",
1555                                         p->quality, p->APPn, p->APP_len,
1556                                         p->COM_len, p->jpeg_markers);
1557                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1558                 break;
1559         }
1560         case VIDIOC_G_ENC_INDEX:
1561         {
1562                 struct v4l2_enc_idx *p = arg;
1563
1564                 if (!ops->vidioc_g_enc_index)
1565                         break;
1566                 ret = ops->vidioc_g_enc_index(file, fh, p);
1567                 if (!ret)
1568                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1569                                         p->entries, p->entries_cap);
1570                 break;
1571         }
1572         case VIDIOC_ENCODER_CMD:
1573         {
1574                 struct v4l2_encoder_cmd *p = arg;
1575
1576                 if (!ops->vidioc_encoder_cmd)
1577                         break;
1578                 memset(&p->raw, 0, sizeof(p->raw));
1579                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1580                 if (!ret)
1581                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1582                 break;
1583         }
1584         case VIDIOC_TRY_ENCODER_CMD:
1585         {
1586                 struct v4l2_encoder_cmd *p = arg;
1587
1588                 if (!ops->vidioc_try_encoder_cmd)
1589                         break;
1590                 memset(&p->raw, 0, sizeof(p->raw));
1591                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1592                 if (!ret)
1593                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1594                 break;
1595         }
1596         case VIDIOC_G_PARM:
1597         {
1598                 struct v4l2_streamparm *p = arg;
1599                 __u32 type = p->type;
1600
1601                 memset(p, 0, sizeof(*p));
1602                 p->type = type;
1603
1604                 if (ops->vidioc_g_parm) {
1605                         ret = ops->vidioc_g_parm(file, fh, p);
1606                 } else {
1607                         struct v4l2_standard s;
1608
1609                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1610                                 return -EINVAL;
1611
1612                         v4l2_video_std_construct(&s, vfd->current_norm,
1613                                                  v4l2_norm_to_name(vfd->current_norm));
1614
1615                         p->parm.capture.timeperframe = s.frameperiod;
1616                         ret = 0;
1617                 }
1618
1619                 dbgarg(cmd, "type=%d\n", p->type);
1620                 break;
1621         }
1622         case VIDIOC_S_PARM:
1623         {
1624                 struct v4l2_streamparm *p = arg;
1625
1626                 if (!ops->vidioc_s_parm)
1627                         break;
1628                 dbgarg(cmd, "type=%d\n", p->type);
1629                 ret = ops->vidioc_s_parm(file, fh, p);
1630                 break;
1631         }
1632         case VIDIOC_G_TUNER:
1633         {
1634                 struct v4l2_tuner *p = arg;
1635                 __u32 index = p->index;
1636
1637                 if (!ops->vidioc_g_tuner)
1638                         break;
1639
1640                 memset(p, 0, sizeof(*p));
1641                 p->index = index;
1642
1643                 ret = ops->vidioc_g_tuner(file, fh, p);
1644                 if (!ret)
1645                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1646                                         "capability=0x%x, rangelow=%d, "
1647                                         "rangehigh=%d, signal=%d, afc=%d, "
1648                                         "rxsubchans=0x%x, audmode=%d\n",
1649                                         p->index, p->name, p->type,
1650                                         p->capability, p->rangelow,
1651                                         p->rangehigh, p->signal, p->afc,
1652                                         p->rxsubchans, p->audmode);
1653                 break;
1654         }
1655         case VIDIOC_S_TUNER:
1656         {
1657                 struct v4l2_tuner *p = arg;
1658
1659                 if (!ops->vidioc_s_tuner)
1660                         break;
1661                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1662                                 "capability=0x%x, rangelow=%d, "
1663                                 "rangehigh=%d, signal=%d, afc=%d, "
1664                                 "rxsubchans=0x%x, audmode=%d\n",
1665                                 p->index, p->name, p->type,
1666                                 p->capability, p->rangelow,
1667                                 p->rangehigh, p->signal, p->afc,
1668                                 p->rxsubchans, p->audmode);
1669                 ret = ops->vidioc_s_tuner(file, fh, p);
1670                 break;
1671         }
1672         case VIDIOC_G_FREQUENCY:
1673         {
1674                 struct v4l2_frequency *p = arg;
1675
1676                 if (!ops->vidioc_g_frequency)
1677                         break;
1678
1679                 memset(p->reserved, 0, sizeof(p->reserved));
1680
1681                 ret = ops->vidioc_g_frequency(file, fh, p);
1682                 if (!ret)
1683                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1684                                         p->tuner, p->type, p->frequency);
1685                 break;
1686         }
1687         case VIDIOC_S_FREQUENCY:
1688         {
1689                 struct v4l2_frequency *p = arg;
1690
1691                 if (!ops->vidioc_s_frequency)
1692                         break;
1693                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1694                                 p->tuner, p->type, p->frequency);
1695                 ret = ops->vidioc_s_frequency(file, fh, p);
1696                 break;
1697         }
1698         case VIDIOC_G_SLICED_VBI_CAP:
1699         {
1700                 struct v4l2_sliced_vbi_cap *p = arg;
1701                 __u32 type = p->type;
1702
1703                 if (!ops->vidioc_g_sliced_vbi_cap)
1704                         break;
1705                 memset(p, 0, sizeof(*p));
1706                 p->type = type;
1707                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1708                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1709                 if (!ret)
1710                         dbgarg2("service_set=%d\n", p->service_set);
1711                 break;
1712         }
1713         case VIDIOC_LOG_STATUS:
1714         {
1715                 if (!ops->vidioc_log_status)
1716                         break;
1717                 ret = ops->vidioc_log_status(file, fh);
1718                 break;
1719         }
1720 #ifdef CONFIG_VIDEO_ADV_DEBUG
1721         case VIDIOC_DBG_G_REGISTER:
1722         {
1723                 struct v4l2_dbg_register *p = arg;
1724
1725                 if (!capable(CAP_SYS_ADMIN))
1726                         ret = -EPERM;
1727                 else if (ops->vidioc_g_register)
1728                         ret = ops->vidioc_g_register(file, fh, p);
1729                 break;
1730         }
1731         case VIDIOC_DBG_S_REGISTER:
1732         {
1733                 struct v4l2_dbg_register *p = arg;
1734
1735                 if (!capable(CAP_SYS_ADMIN))
1736                         ret = -EPERM;
1737                 else if (ops->vidioc_s_register)
1738                         ret = ops->vidioc_s_register(file, fh, p);
1739                 break;
1740         }
1741 #endif
1742         case VIDIOC_DBG_G_CHIP_IDENT:
1743         {
1744                 struct v4l2_dbg_chip_ident *p = arg;
1745
1746                 if (!ops->vidioc_g_chip_ident)
1747                         break;
1748                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1749                 if (!ret)
1750                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1751                 break;
1752         }
1753         case VIDIOC_G_CHIP_IDENT_OLD:
1754                 printk(KERN_ERR "VIDIOC_G_CHIP_IDENT has been deprecated and will disappear in 2.6.30.\n");
1755                 printk(KERN_ERR "It is a debugging ioctl and must not be used in applications!\n");
1756                 return -EINVAL;
1757
1758         case VIDIOC_S_HW_FREQ_SEEK:
1759         {
1760                 struct v4l2_hw_freq_seek *p = arg;
1761
1762                 if (!ops->vidioc_s_hw_freq_seek)
1763                         break;
1764                 dbgarg(cmd,
1765                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1766                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1767                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1768                 break;
1769         }
1770         case VIDIOC_ENUM_FRAMESIZES:
1771         {
1772                 struct v4l2_frmsizeenum *p = arg;
1773
1774                 if (!ops->vidioc_enum_framesizes)
1775                         break;
1776
1777                 memset(p, 0, sizeof(*p));
1778
1779                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1780                 dbgarg(cmd,
1781                         "index=%d, pixelformat=%d, type=%d ",
1782                         p->index, p->pixel_format, p->type);
1783                 switch (p->type) {
1784                 case V4L2_FRMSIZE_TYPE_DISCRETE:
1785                         dbgarg2("width = %d, height=%d\n",
1786                                 p->discrete.width, p->discrete.height);
1787                         break;
1788                 case V4L2_FRMSIZE_TYPE_STEPWISE:
1789                         dbgarg2("min %dx%d, max %dx%d, step %dx%d\n",
1790                                 p->stepwise.min_width,  p->stepwise.min_height,
1791                                 p->stepwise.step_width, p->stepwise.step_height,
1792                                 p->stepwise.max_width,  p->stepwise.max_height);
1793                         break;
1794                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1795                         dbgarg2("continuous\n");
1796                         break;
1797                 default:
1798                         dbgarg2("- Unknown type!\n");
1799                 }
1800
1801                 break;
1802         }
1803         case VIDIOC_ENUM_FRAMEINTERVALS:
1804         {
1805                 struct v4l2_frmivalenum *p = arg;
1806
1807                 if (!ops->vidioc_enum_frameintervals)
1808                         break;
1809
1810                 memset(p, 0, sizeof(*p));
1811
1812                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1813                 dbgarg(cmd,
1814                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1815                         p->index, p->pixel_format,
1816                         p->width, p->height, p->type);
1817                 switch (p->type) {
1818                 case V4L2_FRMIVAL_TYPE_DISCRETE:
1819                         dbgarg2("fps=%d/%d\n",
1820                                 p->discrete.numerator,
1821                                 p->discrete.denominator);
1822                         break;
1823                 case V4L2_FRMIVAL_TYPE_STEPWISE:
1824                         dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1825                                 p->stepwise.min.numerator,
1826                                 p->stepwise.min.denominator,
1827                                 p->stepwise.max.numerator,
1828                                 p->stepwise.max.denominator,
1829                                 p->stepwise.step.numerator,
1830                                 p->stepwise.step.denominator);
1831                         break;
1832                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1833                         dbgarg2("continuous\n");
1834                         break;
1835                 default:
1836                         dbgarg2("- Unknown type!\n");
1837                 }
1838                 break;
1839         }
1840
1841         default:
1842         {
1843                 if (!ops->vidioc_default)
1844                         break;
1845                 ret = ops->vidioc_default(file, fh, cmd, arg);
1846                 break;
1847         }
1848         } /* switch */
1849
1850         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1851                 if (ret < 0) {
1852                         v4l_print_ioctl(vfd->name, cmd);
1853                         printk(KERN_CONT " error %ld\n", ret);
1854                 }
1855         }
1856
1857         return ret;
1858 }
1859
1860 long video_ioctl2(struct file *file,
1861                unsigned int cmd, unsigned long arg)
1862 {
1863         char    sbuf[128];
1864         void    *mbuf = NULL;
1865         void    *parg = NULL;
1866         long    err  = -EINVAL;
1867         int     is_ext_ctrl;
1868         size_t  ctrls_size = 0;
1869         void __user *user_ptr = NULL;
1870
1871 #ifdef __OLD_VIDIOC_
1872         cmd = video_fix_command(cmd);
1873 #endif
1874         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1875                        cmd == VIDIOC_TRY_EXT_CTRLS);
1876
1877         /*  Copy arguments into temp kernel buffer  */
1878         switch (_IOC_DIR(cmd)) {
1879         case _IOC_NONE:
1880                 parg = NULL;
1881                 break;
1882         case _IOC_READ:
1883         case _IOC_WRITE:
1884         case (_IOC_WRITE | _IOC_READ):
1885                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1886                         parg = sbuf;
1887                 } else {
1888                         /* too big to allocate from stack */
1889                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1890                         if (NULL == mbuf)
1891                                 return -ENOMEM;
1892                         parg = mbuf;
1893                 }
1894
1895                 err = -EFAULT;
1896                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1897                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1898                                 goto out;
1899                 break;
1900         }
1901
1902         if (is_ext_ctrl) {
1903                 struct v4l2_ext_controls *p = parg;
1904
1905                 /* In case of an error, tell the caller that it wasn't
1906                    a specific control that caused it. */
1907                 p->error_idx = p->count;
1908                 user_ptr = (void __user *)p->controls;
1909                 if (p->count) {
1910                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1911                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1912                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1913                         err = -ENOMEM;
1914                         if (NULL == mbuf)
1915                                 goto out_ext_ctrl;
1916                         err = -EFAULT;
1917                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1918                                 goto out_ext_ctrl;
1919                         p->controls = mbuf;
1920                 }
1921         }
1922
1923         /* Handles IOCTL */
1924         err = __video_do_ioctl(file, cmd, parg);
1925         if (err == -ENOIOCTLCMD)
1926                 err = -EINVAL;
1927         if (is_ext_ctrl) {
1928                 struct v4l2_ext_controls *p = parg;
1929
1930                 p->controls = (void *)user_ptr;
1931                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1932                         err = -EFAULT;
1933                 goto out_ext_ctrl;
1934         }
1935         if (err < 0)
1936                 goto out;
1937
1938 out_ext_ctrl:
1939         /*  Copy results into user buffer  */
1940         switch (_IOC_DIR(cmd)) {
1941         case _IOC_READ:
1942         case (_IOC_WRITE | _IOC_READ):
1943                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1944                         err = -EFAULT;
1945                 break;
1946         }
1947
1948 out:
1949         kfree(mbuf);
1950         return err;
1951 }
1952 EXPORT_SYMBOL(video_ioctl2);