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                         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(struct video_device *vfd, enum v4l2_buf_type type)
 583 {
 584         switch (type) {
 585         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 586                 if (vfd->vidioc_try_fmt_vid_cap)
 587                         return 0;
 588                 break;
 589         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 590                 if (vfd->vidioc_try_fmt_vid_overlay)
 591                         return 0;
 592                 break;
 593         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 594                 if (vfd->vidioc_try_fmt_vid_out)
 595                         return 0;
 596                 break;
 597         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 598                 if (vfd->vidioc_try_fmt_vid_out_overlay)
 599                         return 0;
 600                 break;
 601         case V4L2_BUF_TYPE_VBI_CAPTURE:
 602                 if (vfd->vidioc_try_fmt_vbi_cap)
 603                         return 0;
 604                 break;
 605         case V4L2_BUF_TYPE_VBI_OUTPUT:
 606                 if (vfd->vidioc_try_fmt_vbi_out)
 607                         return 0;
 608                 break;
 609         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 610                 if (vfd->vidioc_try_fmt_sliced_vbi_cap)
 611                         return 0;
 612                 break;
 613         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 614                 if (vfd->vidioc_try_fmt_sliced_vbi_out)
 615                         return 0;
 616                 break;
 617         case V4L2_BUF_TYPE_PRIVATE:
 618                 if (vfd->vidioc_try_fmt_type_private)
 619                         return 0;
 620                 break;
 621         }
 622         return -EINVAL;
 623 }
 624
 625 static int __video_do_ioctl(struct inode *inode, struct file *file,
 626                 unsigned int cmd, void *arg)
 627 {
 628         struct video_device *vfd = video_devdata(file);
 629         void                 *fh = file->private_data;
 630         int                  ret = -EINVAL;
 631
 632         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 633                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 634                 v4l_print_ioctl(vfd->name, cmd);
 635                 printk(KERN_CONT "\n");
 636         }
 637
 638 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 639         /***********************************************************
 640          Handles calls to the obsoleted V4L1 API
 641          Due to the nature of VIDIOCGMBUF, each driver that supports
 642          V4L1 should implement its own handler for this ioctl.
 643          ***********************************************************/
 644
 645         /* --- streaming capture ------------------------------------- */
 646         if (cmd == VIDIOCGMBUF) {
 647                 struct video_mbuf *p = arg;
 648
 649                 memset(p, 0, sizeof(*p));
 650
 651                 if (!vfd->vidiocgmbuf)
 652                         return ret;
 653                 ret = vfd->vidiocgmbuf(file, fh, p);
 654                 if (!ret)
 655                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 656                                                 p->size, p->frames,
 657                                                 (unsigned long)p->offsets);
 658                 return ret;
 659         }
 660
 661         /********************************************************
 662          All other V4L1 calls are handled by v4l1_compat module.
 663          Those calls will be translated into V4L2 calls, and
 664          __video_do_ioctl will be called again, with one or more
 665          V4L2 ioctls.
 666          ********************************************************/
 667         if (_IOC_TYPE(cmd) == 'v')
 668                 return v4l_compat_translate_ioctl(inode, file, cmd, arg,
 669                                                 __video_do_ioctl);
 670 #endif
 671
 672         switch (cmd) {
 673         /* --- capabilities ------------------------------------------ */
 674         case VIDIOC_QUERYCAP:
 675         {
 676                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 677                 memset(cap, 0, sizeof(*cap));
 678
 679                 if (!vfd->vidioc_querycap)
 680                         break;
 681
 682                 ret = vfd->vidioc_querycap(file, fh, cap);
 683                 if (!ret)
 684                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 685                                         "version=0x%08x, "
 686                                         "capabilities=0x%08x\n",
 687                                         cap->driver, cap->card, cap->bus_info,
 688                                         cap->version,
 689                                         cap->capabilities);
 690                 break;
 691         }
 692
 693         /* --- priority ------------------------------------------ */
 694         case VIDIOC_G_PRIORITY:
 695         {
 696                 enum v4l2_priority *p = arg;
 697
 698                 if (!vfd->vidioc_g_priority)
 699                         break;
 700                 ret = vfd->vidioc_g_priority(file, fh, p);
 701                 if (!ret)
 702                         dbgarg(cmd, "priority is %d\n", *p);
 703                 break;
 704         }
 705         case VIDIOC_S_PRIORITY:
 706         {
 707                 enum v4l2_priority *p = arg;
 708
 709                 if (!vfd->vidioc_s_priority)
 710                         break;
 711                 dbgarg(cmd, "setting priority to %d\n", *p);
 712                 ret = vfd->vidioc_s_priority(file, fh, *p);
 713                 break;
 714         }
 715
 716         /* --- capture ioctls ---------------------------------------- */
 717         case VIDIOC_ENUM_FMT:
 718         {
 719                 struct v4l2_fmtdesc *f = arg;
 720                 enum v4l2_buf_type type;
 721                 unsigned int index;
 722
 723                 index = f->index;
 724                 type  = f->type;
 725                 memset(f, 0, sizeof(*f));
 726                 f->index = index;
 727                 f->type  = type;
 728
 729                 switch (type) {
 730                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 731                         if (vfd->vidioc_enum_fmt_vid_cap)
 732                                 ret = vfd->vidioc_enum_fmt_vid_cap(file, fh, f);
 733                         break;
 734                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 735                         if (vfd->vidioc_enum_fmt_vid_overlay)
 736                                 ret = vfd->vidioc_enum_fmt_vid_overlay(file,
 737                                         fh, f);
 738                         break;
 739 #if 1
 740                 /* V4L2_BUF_TYPE_VBI_CAPTURE should not support VIDIOC_ENUM_FMT
 741                  * according to the spec. The bttv and saa7134 drivers support
 742                  * it though, so just warn that this is deprecated and will be
 743                  * removed in the near future. */
 744                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 745                         if (vfd->vidioc_enum_fmt_vbi_cap) {
 746                                 printk(KERN_WARNING "vidioc_enum_fmt_vbi_cap will be removed in 2.6.28!\n");
 747                                 ret = vfd->vidioc_enum_fmt_vbi_cap(file, fh, f);
 748                         }
 749                         break;
 750 #endif
 751                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 752                         if (vfd->vidioc_enum_fmt_vid_out)
 753                                 ret = vfd->vidioc_enum_fmt_vid_out(file, fh, f);
 754                         break;
 755                 case V4L2_BUF_TYPE_PRIVATE:
 756                         if (vfd->vidioc_enum_fmt_type_private)
 757                                 ret = vfd->vidioc_enum_fmt_type_private(file,
 758                                                                 fh, f);
 759                         break;
 760                 default:
 761                         break;
 762                 }
 763                 if (!ret)
 764                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 765                                 "pixelformat=%c%c%c%c, description='%s'\n",
 766                                 f->index, f->type, f->flags,
 767                                 (f->pixelformat & 0xff),
 768                                 (f->pixelformat >>  8) & 0xff,
 769                                 (f->pixelformat >> 16) & 0xff,
 770                                 (f->pixelformat >> 24) & 0xff,
 771                                 f->description);
 772                 break;
 773         }
 774         case VIDIOC_G_FMT:
 775         {
 776                 struct v4l2_format *f = (struct v4l2_format *)arg;
 777
 778                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
 779
 780                 /* FIXME: Should be one dump per type */
 781                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 782
 783                 switch (f->type) {
 784                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 785                         if (vfd->vidioc_g_fmt_vid_cap)
 786                                 ret = vfd->vidioc_g_fmt_vid_cap(file, fh, f);
 787                         if (!ret)
 788                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 789                         break;
 790                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 791                         if (vfd->vidioc_g_fmt_vid_overlay)
 792                                 ret = vfd->vidioc_g_fmt_vid_overlay(file,
 793                                                                     fh, f);
 794                         break;
 795                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 796                         if (vfd->vidioc_g_fmt_vid_out)
 797                                 ret = vfd->vidioc_g_fmt_vid_out(file, fh, f);
 798                         if (!ret)
 799                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 800                         break;
 801                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 802                         if (vfd->vidioc_g_fmt_vid_out_overlay)
 803                                 ret = vfd->vidioc_g_fmt_vid_out_overlay(file,
 804                                        fh, f);
 805                         break;
 806                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 807                         if (vfd->vidioc_g_fmt_vbi_cap)
 808                                 ret = vfd->vidioc_g_fmt_vbi_cap(file, fh, f);
 809                         break;
 810                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 811                         if (vfd->vidioc_g_fmt_vbi_out)
 812                                 ret = vfd->vidioc_g_fmt_vbi_out(file, fh, f);
 813                         break;
 814                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 815                         if (vfd->vidioc_g_fmt_sliced_vbi_cap)
 816                                 ret = vfd->vidioc_g_fmt_sliced_vbi_cap(file,
 817                                                                         fh, f);
 818                         break;
 819                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 820                         if (vfd->vidioc_g_fmt_sliced_vbi_out)
 821                                 ret = vfd->vidioc_g_fmt_sliced_vbi_out(file,
 822                                                                         fh, f);
 823                         break;
 824                 case V4L2_BUF_TYPE_PRIVATE:
 825                         if (vfd->vidioc_g_fmt_type_private)
 826                                 ret = vfd->vidioc_g_fmt_type_private(file,
 827                                                                 fh, f);
 828                         break;
 829                 }
 830
 831                 break;
 832         }
 833         case VIDIOC_S_FMT:
 834         {
 835                 struct v4l2_format *f = (struct v4l2_format *)arg;
 836
 837                 /* FIXME: Should be one dump per type */
 838                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 839
 840                 switch (f->type) {
 841                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 842                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 843                         if (vfd->vidioc_s_fmt_vid_cap)
 844                                 ret = vfd->vidioc_s_fmt_vid_cap(file, fh, f);
 845                         break;
 846                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 847                         if (vfd->vidioc_s_fmt_vid_overlay)
 848                                 ret = vfd->vidioc_s_fmt_vid_overlay(file,
 849                                                                     fh, f);
 850                         break;
 851                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 852                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 853                         if (vfd->vidioc_s_fmt_vid_out)
 854                                 ret = vfd->vidioc_s_fmt_vid_out(file, fh, f);
 855                         break;
 856                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 857                         if (vfd->vidioc_s_fmt_vid_out_overlay)
 858                                 ret = vfd->vidioc_s_fmt_vid_out_overlay(file,
 859                                         fh, f);
 860                         break;
 861                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 862                         if (vfd->vidioc_s_fmt_vbi_cap)
 863                                 ret = vfd->vidioc_s_fmt_vbi_cap(file, fh, f);
 864                         break;
 865                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 866                         if (vfd->vidioc_s_fmt_vbi_out)
 867                                 ret = vfd->vidioc_s_fmt_vbi_out(file, fh, f);
 868                         break;
 869                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 870                         if (vfd->vidioc_s_fmt_sliced_vbi_cap)
 871                                 ret = vfd->vidioc_s_fmt_sliced_vbi_cap(file,
 872                                                                         fh, f);
 873                         break;
 874                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 875                         if (vfd->vidioc_s_fmt_sliced_vbi_out)
 876                                 ret = vfd->vidioc_s_fmt_sliced_vbi_out(file,
 877                                                                         fh, f);
 878                         break;
 879                 case V4L2_BUF_TYPE_PRIVATE:
 880                         if (vfd->vidioc_s_fmt_type_private)
 881                                 ret = vfd->vidioc_s_fmt_type_private(file,
 882                                                                 fh, f);
 883                         break;
 884                 }
 885                 break;
 886         }
 887         case VIDIOC_TRY_FMT:
 888         {
 889                 struct v4l2_format *f = (struct v4l2_format *)arg;
 890
 891                 /* FIXME: Should be one dump per type */
 892                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 893                                                 v4l2_type_names));
 894                 switch (f->type) {
 895                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 896                         if (vfd->vidioc_try_fmt_vid_cap)
 897                                 ret = vfd->vidioc_try_fmt_vid_cap(file, fh, f);
 898                         if (!ret)
 899                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 900                         break;
 901                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 902                         if (vfd->vidioc_try_fmt_vid_overlay)
 903                                 ret = vfd->vidioc_try_fmt_vid_overlay(file,
 904                                         fh, f);
 905                         break;
 906                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 907                         if (vfd->vidioc_try_fmt_vid_out)
 908                                 ret = vfd->vidioc_try_fmt_vid_out(file, fh, f);
 909                         if (!ret)
 910                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 911                         break;
 912                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 913                         if (vfd->vidioc_try_fmt_vid_out_overlay)
 914                                 ret = vfd->vidioc_try_fmt_vid_out_overlay(file,
 915                                        fh, f);
 916                         break;
 917                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 918                         if (vfd->vidioc_try_fmt_vbi_cap)
 919                                 ret = vfd->vidioc_try_fmt_vbi_cap(file, fh, f);
 920                         break;
 921                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 922                         if (vfd->vidioc_try_fmt_vbi_out)
 923                                 ret = vfd->vidioc_try_fmt_vbi_out(file, fh, f);
 924                         break;
 925                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 926                         if (vfd->vidioc_try_fmt_sliced_vbi_cap)
 927                                 ret = vfd->vidioc_try_fmt_sliced_vbi_cap(file,
 928                                                                 fh, f);
 929                         break;
 930                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 931                         if (vfd->vidioc_try_fmt_sliced_vbi_out)
 932                                 ret = vfd->vidioc_try_fmt_sliced_vbi_out(file,
 933                                                                 fh, f);
 934                         break;
 935                 case V4L2_BUF_TYPE_PRIVATE:
 936                         if (vfd->vidioc_try_fmt_type_private)
 937                                 ret = vfd->vidioc_try_fmt_type_private(file,
 938                                                                 fh, f);
 939                         break;
 940                 }
 941
 942                 break;
 943         }
 944         /* FIXME: Those buf reqs could be handled here,
 945            with some changes on videobuf to allow its header to be included at
 946            videodev2.h or being merged at videodev2.
 947          */
 948         case VIDIOC_REQBUFS:
 949         {
 950                 struct v4l2_requestbuffers *p = arg;
 951
 952                 if (!vfd->vidioc_reqbufs)
 953                         break;
 954                 ret = check_fmt(vfd, p->type);
 955                 if (ret)
 956                         break;
 957
 958                 ret = vfd->vidioc_reqbufs(file, fh, p);
 959                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
 960                                 p->count,
 961                                 prt_names(p->type, v4l2_type_names),
 962                                 prt_names(p->memory, v4l2_memory_names));
 963                 break;
 964         }
 965         case VIDIOC_QUERYBUF:
 966         {
 967                 struct v4l2_buffer *p = arg;
 968
 969                 if (!vfd->vidioc_querybuf)
 970                         break;
 971                 ret = check_fmt(vfd, p->type);
 972                 if (ret)
 973                         break;
 974
 975                 ret = vfd->vidioc_querybuf(file, fh, p);
 976                 if (!ret)
 977                         dbgbuf(cmd, vfd, p);
 978                 break;
 979         }
 980         case VIDIOC_QBUF:
 981         {
 982                 struct v4l2_buffer *p = arg;
 983
 984                 if (!vfd->vidioc_qbuf)
 985                         break;
 986                 ret = check_fmt(vfd, p->type);
 987                 if (ret)
 988                         break;
 989
 990                 ret = vfd->vidioc_qbuf(file, fh, p);
 991                 if (!ret)
 992                         dbgbuf(cmd, vfd, p);
 993                 break;
 994         }
 995         case VIDIOC_DQBUF:
 996         {
 997                 struct v4l2_buffer *p = arg;
 998
 999                 if (!vfd->vidioc_dqbuf)
1000                         break;
1001                 ret = check_fmt(vfd, p->type);
1002                 if (ret)
1003                         break;
1004
1005                 ret = vfd->vidioc_dqbuf(file, fh, p);
1006                 if (!ret)
1007                         dbgbuf(cmd, vfd, p);
1008                 break;
1009         }
1010         case VIDIOC_OVERLAY:
1011         {
1012                 int *i = arg;
1013
1014                 if (!vfd->vidioc_overlay)
1015                         break;
1016                 dbgarg(cmd, "value=%d\n", *i);
1017                 ret = vfd->vidioc_overlay(file, fh, *i);
1018                 break;
1019         }
1020         case VIDIOC_G_FBUF:
1021         {
1022                 struct v4l2_framebuffer *p = arg;
1023
1024                 if (!vfd->vidioc_g_fbuf)
1025                         break;
1026                 ret = vfd->vidioc_g_fbuf(file, fh, arg);
1027                 if (!ret) {
1028                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1029                                         p->capability, p->flags,
1030                                         (unsigned long)p->base);
1031                         v4l_print_pix_fmt(vfd, &p->fmt);
1032                 }
1033                 break;
1034         }
1035         case VIDIOC_S_FBUF:
1036         {
1037                 struct v4l2_framebuffer *p = arg;
1038
1039                 if (!vfd->vidioc_s_fbuf)
1040                         break;
1041                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1042                         p->capability, p->flags, (unsigned long)p->base);
1043                 v4l_print_pix_fmt(vfd, &p->fmt);
1044                 ret = vfd->vidioc_s_fbuf(file, fh, arg);
1045                 break;
1046         }
1047         case VIDIOC_STREAMON:
1048         {
1049                 enum v4l2_buf_type i = *(int *)arg;
1050
1051                 if (!vfd->vidioc_streamon)
1052                         break;
1053                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1054                 ret = vfd->vidioc_streamon(file, fh, i);
1055                 break;
1056         }
1057         case VIDIOC_STREAMOFF:
1058         {
1059                 enum v4l2_buf_type i = *(int *)arg;
1060
1061                 if (!vfd->vidioc_streamoff)
1062                         break;
1063                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1064                 ret = vfd->vidioc_streamoff(file, fh, i);
1065                 break;
1066         }
1067         /* ---------- tv norms ---------- */
1068         case VIDIOC_ENUMSTD:
1069         {
1070                 struct v4l2_standard *p = arg;
1071                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1072                 unsigned int index = p->index, i, j = 0;
1073                 const char *descr = "";
1074
1075                 /* Return norm array in a canonical way */
1076                 for (i = 0; i <= index && id; i++) {
1077                         /* last std value in the standards array is 0, so this
1078                            while always ends there since (id & 0) == 0. */
1079                         while ((id & standards[j].std) != standards[j].std)
1080                                 j++;
1081                         curr_id = standards[j].std;
1082                         descr = standards[j].descr;
1083                         j++;
1084                         if (curr_id == 0)
1085                                 break;
1086                         if (curr_id != V4L2_STD_PAL &&
1087                             curr_id != V4L2_STD_SECAM &&
1088                             curr_id != V4L2_STD_NTSC)
1089                                 id &= ~curr_id;
1090                 }
1091                 if (i <= index)
1092                         return -EINVAL;
1093
1094                 v4l2_video_std_construct(p, curr_id, descr);
1095                 p->index = index;
1096
1097                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1098                                 "framelines=%d\n", p->index,
1099                                 (unsigned long long)p->id, p->name,
1100                                 p->frameperiod.numerator,
1101                                 p->frameperiod.denominator,
1102                                 p->framelines);
1103
1104                 ret = 0;
1105                 break;
1106         }
1107         case VIDIOC_G_STD:
1108         {
1109                 v4l2_std_id *id = arg;
1110
1111                 ret = 0;
1112                 /* Calls the specific handler */
1113                 if (vfd->vidioc_g_std)
1114                         ret = vfd->vidioc_g_std(file, fh, id);
1115                 else
1116                         *id = vfd->current_norm;
1117
1118                 if (!ret)
1119                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1120                 break;
1121         }
1122         case VIDIOC_S_STD:
1123         {
1124                 v4l2_std_id *id = arg, norm;
1125
1126                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1127
1128                 norm = (*id) & vfd->tvnorms;
1129                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1130                         break;
1131
1132                 /* Calls the specific handler */
1133                 if (vfd->vidioc_s_std)
1134                         ret = vfd->vidioc_s_std(file, fh, &norm);
1135                 else
1136                         ret = -EINVAL;
1137
1138                 /* Updates standard information */
1139                 if (ret >= 0)
1140                         vfd->current_norm = norm;
1141                 break;
1142         }
1143         case VIDIOC_QUERYSTD:
1144         {
1145                 v4l2_std_id *p = arg;
1146
1147                 if (!vfd->vidioc_querystd)
1148                         break;
1149                 ret = vfd->vidioc_querystd(file, fh, arg);
1150                 if (!ret)
1151                         dbgarg(cmd, "detected std=%08Lx\n",
1152                                                 (unsigned long long)*p);
1153                 break;
1154         }
1155         /* ------ input switching ---------- */
1156         /* FIXME: Inputs can be handled inside videodev2 */
1157         case VIDIOC_ENUMINPUT:
1158         {
1159                 struct v4l2_input *p = arg;
1160                 int i = p->index;
1161
1162                 if (!vfd->vidioc_enum_input)
1163                         break;
1164                 memset(p, 0, sizeof(*p));
1165                 p->index = i;
1166
1167                 ret = vfd->vidioc_enum_input(file, fh, p);
1168                 if (!ret)
1169                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1170                                 "audioset=%d, "
1171                                 "tuner=%d, std=%08Lx, status=%d\n",
1172                                 p->index, p->name, p->type, p->audioset,
1173                                 p->tuner,
1174                                 (unsigned long long)p->std,
1175                                 p->status);
1176                 break;
1177         }
1178         case VIDIOC_G_INPUT:
1179         {
1180                 unsigned int *i = arg;
1181
1182                 if (!vfd->vidioc_g_input)
1183                         break;
1184                 ret = vfd->vidioc_g_input(file, fh, i);
1185                 if (!ret)
1186                         dbgarg(cmd, "value=%d\n", *i);
1187                 break;
1188         }
1189         case VIDIOC_S_INPUT:
1190         {
1191                 unsigned int *i = arg;
1192
1193                 if (!vfd->vidioc_s_input)
1194                         break;
1195                 dbgarg(cmd, "value=%d\n", *i);
1196                 ret = vfd->vidioc_s_input(file, fh, *i);
1197                 break;
1198         }
1199
1200         /* ------ output switching ---------- */
1201         case VIDIOC_ENUMOUTPUT:
1202         {
1203                 struct v4l2_output *p = arg;
1204                 int i = p->index;
1205
1206                 if (!vfd->vidioc_enum_output)
1207                         break;
1208                 memset(p, 0, sizeof(*p));
1209                 p->index = i;
1210
1211                 ret = vfd->vidioc_enum_output(file, fh, p);
1212                 if (!ret)
1213                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1214                                 "audioset=0x%x, "
1215                                 "modulator=%d, std=0x%08Lx\n",
1216                                 p->index, p->name, p->type, p->audioset,
1217                                 p->modulator, (unsigned long long)p->std);
1218                 break;
1219         }
1220         case VIDIOC_G_OUTPUT:
1221         {
1222                 unsigned int *i = arg;
1223
1224                 if (!vfd->vidioc_g_output)
1225                         break;
1226                 ret = vfd->vidioc_g_output(file, fh, i);
1227                 if (!ret)
1228                         dbgarg(cmd, "value=%d\n", *i);
1229                 break;
1230         }
1231         case VIDIOC_S_OUTPUT:
1232         {
1233                 unsigned int *i = arg;
1234
1235                 if (!vfd->vidioc_s_output)
1236                         break;
1237                 dbgarg(cmd, "value=%d\n", *i);
1238                 ret = vfd->vidioc_s_output(file, fh, *i);
1239                 break;
1240         }
1241
1242         /* --- controls ---------------------------------------------- */
1243         case VIDIOC_QUERYCTRL:
1244         {
1245                 struct v4l2_queryctrl *p = arg;
1246
1247                 if (!vfd->vidioc_queryctrl)
1248                         break;
1249                 ret = vfd->vidioc_queryctrl(file, fh, p);
1250                 if (!ret)
1251                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1252                                         "step=%d, default=%d, flags=0x%08x\n",
1253                                         p->id, p->type, p->name,
1254                                         p->minimum, p->maximum,
1255                                         p->step, p->default_value, p->flags);
1256                 else
1257                         dbgarg(cmd, "id=0x%x\n", p->id);
1258                 break;
1259         }
1260         case VIDIOC_G_CTRL:
1261         {
1262                 struct v4l2_control *p = arg;
1263
1264                 if (vfd->vidioc_g_ctrl)
1265                         ret = vfd->vidioc_g_ctrl(file, fh, p);
1266                 else if (vfd->vidioc_g_ext_ctrls) {
1267                         struct v4l2_ext_controls ctrls;
1268                         struct v4l2_ext_control ctrl;
1269
1270                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1271                         ctrls.count = 1;
1272                         ctrls.controls = &ctrl;
1273                         ctrl.id = p->id;
1274                         ctrl.value = p->value;
1275                         if (check_ext_ctrls(&ctrls, 1)) {
1276                                 ret = vfd->vidioc_g_ext_ctrls(file, fh, &ctrls);
1277                                 if (ret == 0)
1278                                         p->value = ctrl.value;
1279                         }
1280                 } else
1281                         break;
1282                 if (!ret)
1283                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1284                 else
1285                         dbgarg(cmd, "id=0x%x\n", p->id);
1286                 break;
1287         }
1288         case VIDIOC_S_CTRL:
1289         {
1290                 struct v4l2_control *p = arg;
1291                 struct v4l2_ext_controls ctrls;
1292                 struct v4l2_ext_control ctrl;
1293
1294                 if (!vfd->vidioc_s_ctrl && !vfd->vidioc_s_ext_ctrls)
1295                         break;
1296
1297                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1298
1299                 if (vfd->vidioc_s_ctrl) {
1300                         ret = vfd->vidioc_s_ctrl(file, fh, p);
1301                         break;
1302                 }
1303                 if (!vfd->vidioc_s_ext_ctrls)
1304                         break;
1305
1306                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1307                 ctrls.count = 1;
1308                 ctrls.controls = &ctrl;
1309                 ctrl.id = p->id;
1310                 ctrl.value = p->value;
1311                 if (check_ext_ctrls(&ctrls, 1))
1312                         ret = vfd->vidioc_s_ext_ctrls(file, fh, &ctrls);
1313                 break;
1314         }
1315         case VIDIOC_G_EXT_CTRLS:
1316         {
1317                 struct v4l2_ext_controls *p = arg;
1318
1319                 p->error_idx = p->count;
1320                 if (!vfd->vidioc_g_ext_ctrls)
1321                         break;
1322                 if (check_ext_ctrls(p, 0))
1323                         ret = vfd->vidioc_g_ext_ctrls(file, fh, p);
1324                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1325                 break;
1326         }
1327         case VIDIOC_S_EXT_CTRLS:
1328         {
1329                 struct v4l2_ext_controls *p = arg;
1330
1331                 p->error_idx = p->count;
1332                 if (!vfd->vidioc_s_ext_ctrls)
1333                         break;
1334                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1335                 if (check_ext_ctrls(p, 0))
1336                         ret = vfd->vidioc_s_ext_ctrls(file, fh, p);
1337                 break;
1338         }
1339         case VIDIOC_TRY_EXT_CTRLS:
1340         {
1341                 struct v4l2_ext_controls *p = arg;
1342
1343                 p->error_idx = p->count;
1344                 if (!vfd->vidioc_try_ext_ctrls)
1345                         break;
1346                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1347                 if (check_ext_ctrls(p, 0))
1348                         ret = vfd->vidioc_try_ext_ctrls(file, fh, p);
1349                 break;
1350         }
1351         case VIDIOC_QUERYMENU:
1352         {
1353                 struct v4l2_querymenu *p = arg;
1354
1355                 if (!vfd->vidioc_querymenu)
1356                         break;
1357                 ret = vfd->vidioc_querymenu(file, fh, p);
1358                 if (!ret)
1359                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1360                                 p->id, p->index, p->name);
1361                 else
1362                         dbgarg(cmd, "id=0x%x, index=%d\n",
1363                                 p->id, p->index);
1364                 break;
1365         }
1366         /* --- audio ---------------------------------------------- */
1367         case VIDIOC_ENUMAUDIO:
1368         {
1369                 struct v4l2_audio *p = arg;
1370
1371                 if (!vfd->vidioc_enumaudio)
1372                         break;
1373                 ret = vfd->vidioc_enumaudio(file, fh, p);
1374                 if (!ret)
1375                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1376                                         "mode=0x%x\n", p->index, p->name,
1377                                         p->capability, p->mode);
1378                 else
1379                         dbgarg(cmd, "index=%d\n", p->index);
1380                 break;
1381         }
1382         case VIDIOC_G_AUDIO:
1383         {
1384                 struct v4l2_audio *p = arg;
1385                 __u32 index = p->index;
1386
1387                 if (!vfd->vidioc_g_audio)
1388                         break;
1389
1390                 memset(p, 0, sizeof(*p));
1391                 p->index = index;
1392                 ret = vfd->vidioc_g_audio(file, fh, p);
1393                 if (!ret)
1394                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1395                                         "mode=0x%x\n", p->index,
1396                                         p->name, p->capability, p->mode);
1397                 else
1398                         dbgarg(cmd, "index=%d\n", p->index);
1399                 break;
1400         }
1401         case VIDIOC_S_AUDIO:
1402         {
1403                 struct v4l2_audio *p = arg;
1404
1405                 if (!vfd->vidioc_s_audio)
1406                         break;
1407                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1408                                         "mode=0x%x\n", p->index, p->name,
1409                                         p->capability, p->mode);
1410                 ret = vfd->vidioc_s_audio(file, fh, p);
1411                 break;
1412         }
1413         case VIDIOC_ENUMAUDOUT:
1414         {
1415                 struct v4l2_audioout *p = arg;
1416
1417                 if (!vfd->vidioc_enumaudout)
1418                         break;
1419                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1420                 ret = vfd->vidioc_enumaudout(file, fh, p);
1421                 if (!ret)
1422                         dbgarg2("index=%d, name=%s, capability=%d, "
1423                                         "mode=%d\n", p->index, p->name,
1424                                         p->capability, p->mode);
1425                 break;
1426         }
1427         case VIDIOC_G_AUDOUT:
1428         {
1429                 struct v4l2_audioout *p = arg;
1430
1431                 if (!vfd->vidioc_g_audout)
1432                         break;
1433                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1434                 ret = vfd->vidioc_g_audout(file, fh, p);
1435                 if (!ret)
1436                         dbgarg2("index=%d, name=%s, capability=%d, "
1437                                         "mode=%d\n", p->index, p->name,
1438                                         p->capability, p->mode);
1439                 break;
1440         }
1441         case VIDIOC_S_AUDOUT:
1442         {
1443                 struct v4l2_audioout *p = arg;
1444
1445                 if (!vfd->vidioc_s_audout)
1446                         break;
1447                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1448                                         "mode=%d\n", p->index, p->name,
1449                                         p->capability, p->mode);
1450
1451                 ret = vfd->vidioc_s_audout(file, fh, p);
1452                 break;
1453         }
1454         case VIDIOC_G_MODULATOR:
1455         {
1456                 struct v4l2_modulator *p = arg;
1457
1458                 if (!vfd->vidioc_g_modulator)
1459                         break;
1460                 ret = vfd->vidioc_g_modulator(file, fh, p);
1461                 if (!ret)
1462                         dbgarg(cmd, "index=%d, name=%s, "
1463                                         "capability=%d, rangelow=%d,"
1464                                         " rangehigh=%d, txsubchans=%d\n",
1465                                         p->index, p->name, p->capability,
1466                                         p->rangelow, p->rangehigh,
1467                                         p->txsubchans);
1468                 break;
1469         }
1470         case VIDIOC_S_MODULATOR:
1471         {
1472                 struct v4l2_modulator *p = arg;
1473
1474                 if (!vfd->vidioc_s_modulator)
1475                         break;
1476                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1477                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1478                                 p->index, p->name, p->capability, p->rangelow,
1479                                 p->rangehigh, p->txsubchans);
1480                         ret = vfd->vidioc_s_modulator(file, fh, p);
1481                 break;
1482         }
1483         case VIDIOC_G_CROP:
1484         {
1485                 struct v4l2_crop *p = arg;
1486
1487                 if (!vfd->vidioc_g_crop)
1488                         break;
1489                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1490                 ret = vfd->vidioc_g_crop(file, fh, p);
1491                 if (!ret)
1492                         dbgrect(vfd, "", &p->c);
1493                 break;
1494         }
1495         case VIDIOC_S_CROP:
1496         {
1497                 struct v4l2_crop *p = arg;
1498
1499                 if (!vfd->vidioc_s_crop)
1500                         break;
1501                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1502                 dbgrect(vfd, "", &p->c);
1503                 ret = vfd->vidioc_s_crop(file, fh, p);
1504                 break;
1505         }
1506         case VIDIOC_CROPCAP:
1507         {
1508                 struct v4l2_cropcap *p = arg;
1509
1510                 /*FIXME: Should also show v4l2_fract pixelaspect */
1511                 if (!vfd->vidioc_cropcap)
1512                         break;
1513                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1514                 ret = vfd->vidioc_cropcap(file, fh, p);
1515                 if (!ret) {
1516                         dbgrect(vfd, "bounds ", &p->bounds);
1517                         dbgrect(vfd, "defrect ", &p->defrect);
1518                 }
1519                 break;
1520         }
1521         case VIDIOC_G_JPEGCOMP:
1522         {
1523                 struct v4l2_jpegcompression *p = arg;
1524
1525                 if (!vfd->vidioc_g_jpegcomp)
1526                         break;
1527                 ret = vfd->vidioc_g_jpegcomp(file, fh, p);
1528                 if (!ret)
1529                         dbgarg(cmd, "quality=%d, APPn=%d, "
1530                                         "APP_len=%d, COM_len=%d, "
1531                                         "jpeg_markers=%d\n",
1532                                         p->quality, p->APPn, p->APP_len,
1533                                         p->COM_len, p->jpeg_markers);
1534                 break;
1535         }
1536         case VIDIOC_S_JPEGCOMP:
1537         {
1538                 struct v4l2_jpegcompression *p = arg;
1539
1540                 if (!vfd->vidioc_g_jpegcomp)
1541                         break;
1542                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1543                                         "COM_len=%d, jpeg_markers=%d\n",
1544                                         p->quality, p->APPn, p->APP_len,
1545                                         p->COM_len, p->jpeg_markers);
1546                         ret = vfd->vidioc_s_jpegcomp(file, fh, p);
1547                 break;
1548         }
1549         case VIDIOC_G_ENC_INDEX:
1550         {
1551                 struct v4l2_enc_idx *p = arg;
1552
1553                 if (!vfd->vidioc_g_enc_index)
1554                         break;
1555                 ret = vfd->vidioc_g_enc_index(file, fh, p);
1556                 if (!ret)
1557                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1558                                         p->entries, p->entries_cap);
1559                 break;
1560         }
1561         case VIDIOC_ENCODER_CMD:
1562         {
1563                 struct v4l2_encoder_cmd *p = arg;
1564
1565                 if (!vfd->vidioc_encoder_cmd)
1566                         break;
1567                 memset(&p->raw, 0, sizeof(p->raw));
1568                 ret = vfd->vidioc_encoder_cmd(file, fh, p);
1569                 if (!ret)
1570                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1571                 break;
1572         }
1573         case VIDIOC_TRY_ENCODER_CMD:
1574         {
1575                 struct v4l2_encoder_cmd *p = arg;
1576
1577                 if (!vfd->vidioc_try_encoder_cmd)
1578                         break;
1579                 memset(&p->raw, 0, sizeof(p->raw));
1580                 ret = vfd->vidioc_try_encoder_cmd(file, fh, p);
1581                 if (!ret)
1582                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1583                 break;
1584         }
1585         case VIDIOC_G_PARM:
1586         {
1587                 struct v4l2_streamparm *p = arg;
1588                 __u32 type = p->type;
1589
1590                 memset(p, 0, sizeof(*p));
1591                 p->type = type;
1592
1593                 if (vfd->vidioc_g_parm) {
1594                         ret = vfd->vidioc_g_parm(file, fh, p);
1595                 } else {
1596                         struct v4l2_standard s;
1597
1598                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1599                                 return -EINVAL;
1600
1601                         v4l2_video_std_construct(&s, vfd->current_norm,
1602                                                  v4l2_norm_to_name(vfd->current_norm));
1603
1604                         p->parm.capture.timeperframe = s.frameperiod;
1605                         ret = 0;
1606                 }
1607
1608                 dbgarg(cmd, "type=%d\n", p->type);
1609                 break;
1610         }
1611         case VIDIOC_S_PARM:
1612         {
1613                 struct v4l2_streamparm *p = arg;
1614
1615                 if (!vfd->vidioc_s_parm)
1616                         break;
1617                 dbgarg(cmd, "type=%d\n", p->type);
1618                 ret = vfd->vidioc_s_parm(file, fh, p);
1619                 break;
1620         }
1621         case VIDIOC_G_TUNER:
1622         {
1623                 struct v4l2_tuner *p = arg;
1624                 __u32 index = p->index;
1625
1626                 if (!vfd->vidioc_g_tuner)
1627                         break;
1628
1629                 memset(p, 0, sizeof(*p));
1630                 p->index = index;
1631
1632                 ret = vfd->vidioc_g_tuner(file, fh, p);
1633                 if (!ret)
1634                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1635                                         "capability=0x%x, rangelow=%d, "
1636                                         "rangehigh=%d, signal=%d, afc=%d, "
1637                                         "rxsubchans=0x%x, audmode=%d\n",
1638                                         p->index, p->name, p->type,
1639                                         p->capability, p->rangelow,
1640                                         p->rangehigh, p->signal, p->afc,
1641                                         p->rxsubchans, p->audmode);
1642                 break;
1643         }
1644         case VIDIOC_S_TUNER:
1645         {
1646                 struct v4l2_tuner *p = arg;
1647
1648                 if (!vfd->vidioc_s_tuner)
1649                         break;
1650                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1651                                 "capability=0x%x, rangelow=%d, "
1652                                 "rangehigh=%d, signal=%d, afc=%d, "
1653                                 "rxsubchans=0x%x, audmode=%d\n",
1654                                 p->index, p->name, p->type,
1655                                 p->capability, p->rangelow,
1656                                 p->rangehigh, p->signal, p->afc,
1657                                 p->rxsubchans, p->audmode);
1658                 ret = vfd->vidioc_s_tuner(file, fh, p);
1659                 break;
1660         }
1661         case VIDIOC_G_FREQUENCY:
1662         {
1663                 struct v4l2_frequency *p = arg;
1664
1665                 if (!vfd->vidioc_g_frequency)
1666                         break;
1667
1668                 memset(p->reserved, 0, sizeof(p->reserved));
1669
1670                 ret = vfd->vidioc_g_frequency(file, fh, p);
1671                 if (!ret)
1672                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1673                                         p->tuner, p->type, p->frequency);
1674                 break;
1675         }
1676         case VIDIOC_S_FREQUENCY:
1677         {
1678                 struct v4l2_frequency *p = arg;
1679
1680                 if (!vfd->vidioc_s_frequency)
1681                         break;
1682                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1683                                 p->tuner, p->type, p->frequency);
1684                 ret = vfd->vidioc_s_frequency(file, fh, p);
1685                 break;
1686         }
1687         case VIDIOC_G_SLICED_VBI_CAP:
1688         {
1689                 struct v4l2_sliced_vbi_cap *p = arg;
1690                 __u32 type = p->type;
1691
1692                 if (!vfd->vidioc_g_sliced_vbi_cap)
1693                         break;
1694                 memset(p, 0, sizeof(*p));
1695                 p->type = type;
1696                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1697                 ret = vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1698                 if (!ret)
1699                         dbgarg2("service_set=%d\n", p->service_set);
1700                 break;
1701         }
1702         case VIDIOC_LOG_STATUS:
1703         {
1704                 if (!vfd->vidioc_log_status)
1705                         break;
1706                 ret = vfd->vidioc_log_status(file, fh);
1707                 break;
1708         }
1709 #ifdef CONFIG_VIDEO_ADV_DEBUG
1710         case VIDIOC_DBG_G_REGISTER:
1711         {
1712                 struct v4l2_register *p = arg;
1713
1714                 if (!capable(CAP_SYS_ADMIN))
1715                         ret = -EPERM;
1716                 else if (vfd->vidioc_g_register)
1717                         ret = vfd->vidioc_g_register(file, fh, p);
1718                 break;
1719         }
1720         case VIDIOC_DBG_S_REGISTER:
1721         {
1722                 struct v4l2_register *p = arg;
1723
1724                 if (!capable(CAP_SYS_ADMIN))
1725                         ret = -EPERM;
1726                 else if (vfd->vidioc_s_register)
1727                         ret = vfd->vidioc_s_register(file, fh, p);
1728                 break;
1729         }
1730 #endif
1731         case VIDIOC_G_CHIP_IDENT:
1732         {
1733                 struct v4l2_chip_ident *p = arg;
1734
1735                 if (!vfd->vidioc_g_chip_ident)
1736                         break;
1737                 ret = vfd->vidioc_g_chip_ident(file, fh, p);
1738                 if (!ret)
1739                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1740                 break;
1741         }
1742         default:
1743         {
1744                 if (!vfd->vidioc_default)
1745                         break;
1746                 ret = vfd->vidioc_default(file, fh, cmd, arg);
1747                 break;
1748         }
1749         case VIDIOC_S_HW_FREQ_SEEK:
1750         {
1751                 struct v4l2_hw_freq_seek *p = arg;
1752
1753                 if (!vfd->vidioc_s_hw_freq_seek)
1754                         break;
1755                 dbgarg(cmd,
1756                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1757                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1758                 ret = vfd->vidioc_s_hw_freq_seek(file, fh, p);
1759                 break;
1760         }
1761         } /* switch */
1762
1763         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1764                 if (ret < 0) {
1765                         v4l_print_ioctl(vfd->name, cmd);
1766                         printk(KERN_CONT " error %d\n", ret);
1767                 }
1768         }
1769
1770         return ret;
1771 }
1772
1773 int video_ioctl2(struct inode *inode, struct file *file,
1774                unsigned int cmd, unsigned long arg)
1775 {
1776         char    sbuf[128];
1777         void    *mbuf = NULL;
1778         void    *parg = NULL;
1779         int     err  = -EINVAL;
1780         int     is_ext_ctrl;
1781         size_t  ctrls_size = 0;
1782         void __user *user_ptr = NULL;
1783
1784 #ifdef __OLD_VIDIOC_
1785         cmd = video_fix_command(cmd);
1786 #endif
1787         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1788                        cmd == VIDIOC_TRY_EXT_CTRLS);
1789
1790         /*  Copy arguments into temp kernel buffer  */
1791         switch (_IOC_DIR(cmd)) {
1792         case _IOC_NONE:
1793                 parg = NULL;
1794                 break;
1795         case _IOC_READ:
1796         case _IOC_WRITE:
1797         case (_IOC_WRITE | _IOC_READ):
1798                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1799                         parg = sbuf;
1800                 } else {
1801                         /* too big to allocate from stack */
1802                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1803                         if (NULL == mbuf)
1804                                 return -ENOMEM;
1805                         parg = mbuf;
1806                 }
1807
1808                 err = -EFAULT;
1809                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1810                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1811                                 goto out;
1812                 break;
1813         }
1814
1815         if (is_ext_ctrl) {
1816                 struct v4l2_ext_controls *p = parg;
1817
1818                 /* In case of an error, tell the caller that it wasn't
1819                    a specific control that caused it. */
1820                 p->error_idx = p->count;
1821                 user_ptr = (void __user *)p->controls;
1822                 if (p->count) {
1823                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1824                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1825                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1826                         err = -ENOMEM;
1827                         if (NULL == mbuf)
1828                                 goto out_ext_ctrl;
1829                         err = -EFAULT;
1830                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1831                                 goto out_ext_ctrl;
1832                         p->controls = mbuf;
1833                 }
1834         }
1835
1836         /* Handles IOCTL */
1837         err = __video_do_ioctl(inode, file, cmd, parg);
1838         if (err == -ENOIOCTLCMD)
1839                 err = -EINVAL;
1840         if (is_ext_ctrl) {
1841                 struct v4l2_ext_controls *p = parg;
1842
1843                 p->controls = (void *)user_ptr;
1844                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1845                         err = -EFAULT;
1846                 goto out_ext_ctrl;
1847         }
1848         if (err < 0)
1849                 goto out;
1850
1851 out_ext_ctrl:
1852         /*  Copy results into user buffer  */
1853         switch (_IOC_DIR(cmd)) {
1854         case _IOC_READ:
1855         case (_IOC_WRITE | _IOC_READ):
1856                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1857                         err = -EFAULT;
1858                 break;
1859         }
1860
1861 out:
1862         kfree(mbuf);
1863         return err;
1864 }
1865 EXPORT_SYMBOL(video_ioctl2);