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/videodev.h>
  21 #include <linux/videodev2.h>
  22
  23 #ifdef CONFIG_VIDEO_V4L1
  24 #include <linux/videodev.h>
  25 #endif
  26 #include <media/v4l2-common.h>
  27 #include <media/v4l2-ioctl.h>
  28 #include <media/v4l2-chip-ident.h>
  29
  30 #define dbgarg(cmd, fmt, arg...) \
  31                 do {                                                    \
  32                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {            \
  33                         printk(KERN_DEBUG "%s: ",  vfd->name);          \
  34                         v4l_printk_ioctl(cmd);                          \
  35                         printk(" " fmt,  ## arg);                       \
  36                     }                                                   \
  37                 } while (0)
  38
  39 #define dbgarg2(fmt, arg...) \
  40                 do {                                                    \
  41                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  42                         printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
  43                 } while (0)
  44
  45 struct std_descr {
  46         v4l2_std_id std;
  47         const char *descr;
  48 };
  49
  50 static const struct std_descr standards[] = {
  51         { V4L2_STD_NTSC,        "NTSC"      },
  52         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  53         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  54         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  55         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  56         { V4L2_STD_PAL,         "PAL"       },
  57         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  58         { V4L2_STD_PAL_B,       "PAL-B"     },
  59         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  60         { V4L2_STD_PAL_G,       "PAL-G"     },
  61         { V4L2_STD_PAL_H,       "PAL-H"     },
  62         { V4L2_STD_PAL_I,       "PAL-I"     },
  63         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  64         { V4L2_STD_PAL_D,       "PAL-D"     },
  65         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  66         { V4L2_STD_PAL_K,       "PAL-K"     },
  67         { V4L2_STD_PAL_M,       "PAL-M"     },
  68         { V4L2_STD_PAL_N,       "PAL-N"     },
  69         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  70         { V4L2_STD_PAL_60,      "PAL-60"    },
  71         { V4L2_STD_SECAM,       "SECAM"     },
  72         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  73         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  74         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  75         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  76         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  77         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  78         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  79         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  80         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  81         { 0,                    "Unknown"   }
  82 };
  83
  84 /* video4linux standard ID conversion to standard name
  85  */
  86 const char *v4l2_norm_to_name(v4l2_std_id id)
  87 {
  88         u32 myid = id;
  89         int i;
  90
  91         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  92            64 bit comparations. So, on that architecture, with some gcc
  93            variants, compilation fails. Currently, the max value is 30bit wide.
  94          */
  95         BUG_ON(myid != id);
  96
  97         for (i = 0; standards[i].std; i++)
  98                 if (myid == standards[i].std)
  99                         break;
 100         return standards[i].descr;
 101 }
 102 EXPORT_SYMBOL(v4l2_norm_to_name);
 103
 104 /* Returns frame period for the given standard */
 105 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 106 {
 107         if (id & V4L2_STD_525_60) {
 108                 frameperiod->numerator = 1001;
 109                 frameperiod->denominator = 30000;
 110         } else {
 111                 frameperiod->numerator = 1;
 112                 frameperiod->denominator = 25;
 113         }
 114 }
 115 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 116
 117 /* Fill in the fields of a v4l2_standard structure according to the
 118    'id' and 'transmission' parameters.  Returns negative on error.  */
 119 int v4l2_video_std_construct(struct v4l2_standard *vs,
 120                              int id, const char *name)
 121 {
 122         vs->id = id;
 123         v4l2_video_std_frame_period(id, &vs->frameperiod);
 124         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 125         strlcpy(vs->name, name, sizeof(vs->name));
 126         return 0;
 127 }
 128 EXPORT_SYMBOL(v4l2_video_std_construct);
 129
 130 /* ----------------------------------------------------------------- */
 131 /* some arrays for pretty-printing debug messages of enum types      */
 132
 133 const char *v4l2_field_names[] = {
 134         [V4L2_FIELD_ANY]        = "any",
 135         [V4L2_FIELD_NONE]       = "none",
 136         [V4L2_FIELD_TOP]        = "top",
 137         [V4L2_FIELD_BOTTOM]     = "bottom",
 138         [V4L2_FIELD_INTERLACED] = "interlaced",
 139         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 140         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 141         [V4L2_FIELD_ALTERNATE]  = "alternate",
 142         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 143         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 144 };
 145 EXPORT_SYMBOL(v4l2_field_names);
 146
 147 const char *v4l2_type_names[] = {
 148         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 149         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 150         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 151         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 152         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 153         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 154         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 155         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 156 };
 157 EXPORT_SYMBOL(v4l2_type_names);
 158
 159 static const char *v4l2_memory_names[] = {
 160         [V4L2_MEMORY_MMAP]    = "mmap",
 161         [V4L2_MEMORY_USERPTR] = "userptr",
 162         [V4L2_MEMORY_OVERLAY] = "overlay",
 163 };
 164
 165 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 166                            arr[a] : "unknown")
 167
 168 /* ------------------------------------------------------------------ */
 169 /* debug help functions                                               */
 170
 171 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 172 static const char *v4l1_ioctls[] = {
 173         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
 174         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
 175         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
 176         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
 177         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
 178         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
 179         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
 180         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
 181         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
 182         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
 183         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
 184         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
 185         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
 186         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
 187         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
 188         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
 189         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
 190         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
 191         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
 192         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
 193         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
 194         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
 195         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
 196         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
 197         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
 198         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
 199         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
 200         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
 201         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
 202 };
 203 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
 204 #endif
 205
 206 static const char *v4l2_ioctls[] = {
 207         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 208         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 209         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 210         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 211         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 212         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 213         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 214         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 215         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 216         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 217         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 218         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 219         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 220         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 221         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 222         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 223         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 224         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 225         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 226         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 227         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 228         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 229         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 230         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 231         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 232         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 233         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 234         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 235         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 236         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 237         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 238         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 239         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 240         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 241         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 242         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 243         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 244         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 245         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 246         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 247         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 248         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 249         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 250         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 251         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 252         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 253         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 254         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 255         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 256         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 257         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 258         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 259         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 260         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 261         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 262 #if 1
 263         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 264         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 265         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 266         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 267         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 268
 269         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 270         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 271
 272         [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
 273         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 274 #endif
 275 };
 276 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 277
 278 static const char *v4l2_int_ioctls[] = {
 279         [_IOC_NR(AUDC_SET_RADIO)]              = "AUDC_SET_RADIO",
 280
 281         [_IOC_NR(TUNER_SET_TYPE_ADDR)]         = "TUNER_SET_TYPE_ADDR",
 282         [_IOC_NR(TUNER_SET_STANDBY)]           = "TUNER_SET_STANDBY",
 283         [_IOC_NR(TUNER_SET_CONFIG)]            = "TUNER_SET_CONFIG",
 284
 285         [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)]     = "VIDIOC_INT_S_TUNER_MODE",
 286         [_IOC_NR(VIDIOC_INT_RESET)]            = "VIDIOC_INT_RESET",
 287         [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
 288         [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)]  = "VIDIOC_INT_DECODE_VBI_LINE",
 289         [_IOC_NR(VIDIOC_INT_S_VBI_DATA)]       = "VIDIOC_INT_S_VBI_DATA",
 290         [_IOC_NR(VIDIOC_INT_G_VBI_DATA)]       = "VIDIOC_INT_G_VBI_DATA",
 291         [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)]   = "VIDIOC_INT_I2S_CLOCK_FREQ",
 292         [_IOC_NR(VIDIOC_INT_S_STANDBY)]        = "VIDIOC_INT_S_STANDBY",
 293         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
 294         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
 295         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
 296         [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
 297         [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ",
 298         [_IOC_NR(VIDIOC_INT_INIT)]             = "VIDIOC_INT_INIT",
 299         [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)]     = "VIDIOC_INT_G_STD_OUTPUT",
 300         [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)]     = "VIDIOC_INT_S_STD_OUTPUT",
 301 };
 302 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
 303
 304 /* Common ioctl debug function. This function can be used by
 305    external ioctl messages as well as internal V4L ioctl */
 306 void v4l_printk_ioctl(unsigned int cmd)
 307 {
 308         char *dir, *type;
 309
 310         switch (_IOC_TYPE(cmd)) {
 311         case 'd':
 312                 if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
 313                         type = "v4l2_int";
 314                         break;
 315                 }
 316                 printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
 317                 return;
 318 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 319         case 'v':
 320                 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
 321                         type = "v4l1";
 322                         break;
 323                 }
 324                 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
 325                 return;
 326 #endif
 327         case 'V':
 328                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
 329                         type = "v4l2";
 330                         break;
 331                 }
 332                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
 333                 return;
 334         default:
 335                 type = "unknown";
 336         }
 337
 338         switch (_IOC_DIR(cmd)) {
 339         case _IOC_NONE:              dir = "--"; break;
 340         case _IOC_READ:              dir = "r-"; break;
 341         case _IOC_WRITE:             dir = "-w"; break;
 342         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 343         default:                     dir = "*ERR*"; break;
 344         }
 345         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
 346                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 347 }
 348 EXPORT_SYMBOL(v4l_printk_ioctl);
 349
 350 /*
 351  * helper function -- handles userspace copying for ioctl arguments
 352  */
 353
 354 #ifdef __OLD_VIDIOC_
 355 static unsigned int
 356 video_fix_command(unsigned int cmd)
 357 {
 358         switch (cmd) {
 359         case VIDIOC_OVERLAY_OLD:
 360                 cmd = VIDIOC_OVERLAY;
 361                 break;
 362         case VIDIOC_S_PARM_OLD:
 363                 cmd = VIDIOC_S_PARM;
 364                 break;
 365         case VIDIOC_S_CTRL_OLD:
 366                 cmd = VIDIOC_S_CTRL;
 367                 break;
 368         case VIDIOC_G_AUDIO_OLD:
 369                 cmd = VIDIOC_G_AUDIO;
 370                 break;
 371         case VIDIOC_G_AUDOUT_OLD:
 372                 cmd = VIDIOC_G_AUDOUT;
 373                 break;
 374         case VIDIOC_CROPCAP_OLD:
 375                 cmd = VIDIOC_CROPCAP;
 376                 break;
 377         }
 378         return cmd;
 379 }
 380 #endif
 381
 382 /*
 383  * Obsolete usercopy function - Should be removed soon
 384  */
 385 long
 386 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 387                 v4l2_kioctl func)
 388 {
 389         char    sbuf[128];
 390         void    *mbuf = NULL;
 391         void    *parg = NULL;
 392         long    err  = -EINVAL;
 393         int     is_ext_ctrl;
 394         size_t  ctrls_size = 0;
 395         void __user *user_ptr = NULL;
 396
 397 #ifdef __OLD_VIDIOC_
 398         cmd = video_fix_command(cmd);
 399 #endif
 400         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 401                        cmd == VIDIOC_TRY_EXT_CTRLS);
 402
 403         /*  Copy arguments into temp kernel buffer  */
 404         switch (_IOC_DIR(cmd)) {
 405         case _IOC_NONE:
 406                 parg = NULL;
 407                 break;
 408         case _IOC_READ:
 409         case _IOC_WRITE:
 410         case (_IOC_WRITE | _IOC_READ):
 411                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 412                         parg = sbuf;
 413                 } else {
 414                         /* too big to allocate from stack */
 415                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
 416                         if (NULL == mbuf)
 417                                 return -ENOMEM;
 418                         parg = mbuf;
 419                 }
 420
 421                 err = -EFAULT;
 422                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 423                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 424                                 goto out;
 425                 break;
 426         }
 427         if (is_ext_ctrl) {
 428                 struct v4l2_ext_controls *p = parg;
 429
 430                 /* In case of an error, tell the caller that it wasn't
 431                    a specific control that caused it. */
 432                 p->error_idx = p->count;
 433                 user_ptr = (void __user *)p->controls;
 434                 if (p->count) {
 435                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 436                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 437                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 438                         err = -ENOMEM;
 439                         if (NULL == mbuf)
 440                                 goto out_ext_ctrl;
 441                         err = -EFAULT;
 442                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 443                                 goto out_ext_ctrl;
 444                         p->controls = mbuf;
 445                 }
 446         }
 447
 448         /* call driver */
 449         err = func(file, cmd, parg);
 450         if (err == -ENOIOCTLCMD)
 451                 err = -EINVAL;
 452         if (is_ext_ctrl) {
 453                 struct v4l2_ext_controls *p = parg;
 454
 455                 p->controls = (void *)user_ptr;
 456                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 457                         err = -EFAULT;
 458                 goto out_ext_ctrl;
 459         }
 460         if (err < 0)
 461                 goto out;
 462
 463 out_ext_ctrl:
 464         /*  Copy results into user buffer  */
 465         switch (_IOC_DIR(cmd)) {
 466         case _IOC_READ:
 467         case (_IOC_WRITE | _IOC_READ):
 468                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 469                         err = -EFAULT;
 470                 break;
 471         }
 472
 473 out:
 474         kfree(mbuf);
 475         return err;
 476 }
 477 EXPORT_SYMBOL(video_usercopy);
 478
 479 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 480                                         struct v4l2_buffer *p)
 481 {
 482         struct v4l2_timecode *tc = &p->timecode;
 483
 484         dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 485                 "bytesused=%d, flags=0x%08d, "
 486                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 487                         p->timestamp.tv_sec / 3600,
 488                         (int)(p->timestamp.tv_sec / 60) % 60,
 489                         (int)(p->timestamp.tv_sec % 60),
 490                         (long)p->timestamp.tv_usec,
 491                         p->index,
 492                         prt_names(p->type, v4l2_type_names),
 493                         p->bytesused, p->flags,
 494                         p->field, p->sequence,
 495                         prt_names(p->memory, v4l2_memory_names),
 496                         p->m.userptr, p->length);
 497         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
 498                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 499                         tc->hours, tc->minutes, tc->seconds,
 500                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 501 }
 502
 503 static inline void dbgrect(struct video_device *vfd, char *s,
 504                                                         struct v4l2_rect *r)
 505 {
 506         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
 507                                                 r->width, r->height);
 508 };
 509
 510 static inline void v4l_print_pix_fmt(struct video_device *vfd,
 511                                                 struct v4l2_pix_format *fmt)
 512 {
 513         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 514                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 515                 fmt->width, fmt->height,
 516                 (fmt->pixelformat & 0xff),
 517                 (fmt->pixelformat >>  8) & 0xff,
 518                 (fmt->pixelformat >> 16) & 0xff,
 519                 (fmt->pixelformat >> 24) & 0xff,
 520                 prt_names(fmt->field, v4l2_field_names),
 521                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 522 };
 523
 524 static inline void v4l_print_ext_ctrls(unsigned int cmd,
 525         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
 526 {
 527         __u32 i;
 528
 529         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
 530                 return;
 531         dbgarg(cmd, "");
 532         printk(KERN_CONT "class=0x%x", c->ctrl_class);
 533         for (i = 0; i < c->count; i++) {
 534                 if (show_vals)
 535                         printk(KERN_CONT " id/val=0x%x/0x%x",
 536                                 c->controls[i].id, c->controls[i].value);
 537                 else
 538                         printk(KERN_CONT " id=0x%x", c->controls[i].id);
 539         }
 540         printk(KERN_CONT "\n");
 541 };
 542
 543 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 544 {
 545         __u32 i;
 546
 547         /* zero the reserved fields */
 548         c->reserved[0] = c->reserved[1] = 0;
 549         for (i = 0; i < c->count; i++) {
 550                 c->controls[i].reserved2[0] = 0;
 551                 c->controls[i].reserved2[1] = 0;
 552         }
 553         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 554            when using extended controls.
 555            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 556            is it allowed for backwards compatibility.
 557          */
 558         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 559                 return 0;
 560         /* Check that all controls are from the same control class. */
 561         for (i = 0; i < c->count; i++) {
 562                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 563                         c->error_idx = i;
 564                         return 0;
 565                 }
 566         }
 567         return 1;
 568 }
 569
 570 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 571 {
 572         if (ops == NULL)
 573                 return -EINVAL;
 574
 575         switch (type) {
 576         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 577                 if (ops->vidioc_try_fmt_vid_cap)
 578                         return 0;
 579                 break;
 580         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 581                 if (ops->vidioc_try_fmt_vid_overlay)
 582                         return 0;
 583                 break;
 584         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 585                 if (ops->vidioc_try_fmt_vid_out)
 586                         return 0;
 587                 break;
 588         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 589                 if (ops->vidioc_try_fmt_vid_out_overlay)
 590                         return 0;
 591                 break;
 592         case V4L2_BUF_TYPE_VBI_CAPTURE:
 593                 if (ops->vidioc_try_fmt_vbi_cap)
 594                         return 0;
 595                 break;
 596         case V4L2_BUF_TYPE_VBI_OUTPUT:
 597                 if (ops->vidioc_try_fmt_vbi_out)
 598                         return 0;
 599                 break;
 600         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 601                 if (ops->vidioc_try_fmt_sliced_vbi_cap)
 602                         return 0;
 603                 break;
 604         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 605                 if (ops->vidioc_try_fmt_sliced_vbi_out)
 606                         return 0;
 607                 break;
 608         case V4L2_BUF_TYPE_PRIVATE:
 609                 if (ops->vidioc_try_fmt_type_private)
 610                         return 0;
 611                 break;
 612         }
 613         return -EINVAL;
 614 }
 615
 616 static long __video_do_ioctl(struct file *file,
 617                 unsigned int cmd, void *arg)
 618 {
 619         struct video_device *vfd = video_devdata(file);
 620         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 621         void *fh = file->private_data;
 622         long ret = -EINVAL;
 623
 624         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 625                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 626                 v4l_print_ioctl(vfd->name, cmd);
 627                 printk(KERN_CONT "\n");
 628         }
 629
 630         if (ops == NULL) {
 631                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
 632                                 vfd->name);
 633                 return -EINVAL;
 634         }
 635
 636 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 637         /***********************************************************
 638          Handles calls to the obsoleted V4L1 API
 639          Due to the nature of VIDIOCGMBUF, each driver that supports
 640          V4L1 should implement its own handler for this ioctl.
 641          ***********************************************************/
 642
 643         /* --- streaming capture ------------------------------------- */
 644         if (cmd == VIDIOCGMBUF) {
 645                 struct video_mbuf *p = arg;
 646
 647                 if (!ops->vidiocgmbuf)
 648                         return ret;
 649                 ret = ops->vidiocgmbuf(file, fh, p);
 650                 if (!ret)
 651                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 652                                                 p->size, p->frames,
 653                                                 (unsigned long)p->offsets);
 654                 return ret;
 655         }
 656
 657         /********************************************************
 658          All other V4L1 calls are handled by v4l1_compat module.
 659          Those calls will be translated into V4L2 calls, and
 660          __video_do_ioctl will be called again, with one or more
 661          V4L2 ioctls.
 662          ********************************************************/
 663         if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
 664                 return v4l_compat_translate_ioctl(file, cmd, arg,
 665                                                 __video_do_ioctl);
 666 #endif
 667
 668         switch (cmd) {
 669         /* --- capabilities ------------------------------------------ */
 670         case VIDIOC_QUERYCAP:
 671         {
 672                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 673
 674                 if (!ops->vidioc_querycap)
 675                         break;
 676
 677                 ret = ops->vidioc_querycap(file, fh, cap);
 678                 if (!ret)
 679                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 680                                         "version=0x%08x, "
 681                                         "capabilities=0x%08x\n",
 682                                         cap->driver, cap->card, cap->bus_info,
 683                                         cap->version,
 684                                         cap->capabilities);
 685                 break;
 686         }
 687
 688         /* --- priority ------------------------------------------ */
 689         case VIDIOC_G_PRIORITY:
 690         {
 691                 enum v4l2_priority *p = arg;
 692
 693                 if (!ops->vidioc_g_priority)
 694                         break;
 695                 ret = ops->vidioc_g_priority(file, fh, p);
 696                 if (!ret)
 697                         dbgarg(cmd, "priority is %d\n", *p);
 698                 break;
 699         }
 700         case VIDIOC_S_PRIORITY:
 701         {
 702                 enum v4l2_priority *p = arg;
 703
 704                 if (!ops->vidioc_s_priority)
 705                         break;
 706                 dbgarg(cmd, "setting priority to %d\n", *p);
 707                 ret = ops->vidioc_s_priority(file, fh, *p);
 708                 break;
 709         }
 710
 711         /* --- capture ioctls ---------------------------------------- */
 712         case VIDIOC_ENUM_FMT:
 713         {
 714                 struct v4l2_fmtdesc *f = arg;
 715
 716                 switch (f->type) {
 717                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 718                         if (ops->vidioc_enum_fmt_vid_cap)
 719                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
 720                         break;
 721                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 722                         if (ops->vidioc_enum_fmt_vid_overlay)
 723                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
 724                                         fh, f);
 725                         break;
 726                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 727                         if (ops->vidioc_enum_fmt_vid_out)
 728                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
 729                         break;
 730                 case V4L2_BUF_TYPE_PRIVATE:
 731                         if (ops->vidioc_enum_fmt_type_private)
 732                                 ret = ops->vidioc_enum_fmt_type_private(file,
 733                                                                 fh, f);
 734                         break;
 735                 default:
 736                         break;
 737                 }
 738                 if (!ret)
 739                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 740                                 "pixelformat=%c%c%c%c, description='%s'\n",
 741                                 f->index, f->type, f->flags,
 742                                 (f->pixelformat & 0xff),
 743                                 (f->pixelformat >>  8) & 0xff,
 744                                 (f->pixelformat >> 16) & 0xff,
 745                                 (f->pixelformat >> 24) & 0xff,
 746                                 f->description);
 747                 break;
 748         }
 749         case VIDIOC_G_FMT:
 750         {
 751                 struct v4l2_format *f = (struct v4l2_format *)arg;
 752
 753                 /* FIXME: Should be one dump per type */
 754                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 755
 756                 switch (f->type) {
 757                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 758                         if (ops->vidioc_g_fmt_vid_cap)
 759                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
 760                         if (!ret)
 761                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 762                         break;
 763                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 764                         if (ops->vidioc_g_fmt_vid_overlay)
 765                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
 766                                                                     fh, f);
 767                         break;
 768                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 769                         if (ops->vidioc_g_fmt_vid_out)
 770                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
 771                         if (!ret)
 772                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 773                         break;
 774                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 775                         if (ops->vidioc_g_fmt_vid_out_overlay)
 776                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
 777                                        fh, f);
 778                         break;
 779                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 780                         if (ops->vidioc_g_fmt_vbi_cap)
 781                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
 782                         break;
 783                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 784                         if (ops->vidioc_g_fmt_vbi_out)
 785                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
 786                         break;
 787                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 788                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
 789                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
 790                                                                         fh, f);
 791                         break;
 792                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 793                         if (ops->vidioc_g_fmt_sliced_vbi_out)
 794                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
 795                                                                         fh, f);
 796                         break;
 797                 case V4L2_BUF_TYPE_PRIVATE:
 798                         if (ops->vidioc_g_fmt_type_private)
 799                                 ret = ops->vidioc_g_fmt_type_private(file,
 800                                                                 fh, f);
 801                         break;
 802                 }
 803
 804                 break;
 805         }
 806         case VIDIOC_S_FMT:
 807         {
 808                 struct v4l2_format *f = (struct v4l2_format *)arg;
 809
 810                 /* FIXME: Should be one dump per type */
 811                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 812
 813                 switch (f->type) {
 814                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 815                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 816                         if (ops->vidioc_s_fmt_vid_cap)
 817                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
 818                         break;
 819                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 820                         if (ops->vidioc_s_fmt_vid_overlay)
 821                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
 822                                                                     fh, f);
 823                         break;
 824                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 825                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 826                         if (ops->vidioc_s_fmt_vid_out)
 827                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
 828                         break;
 829                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 830                         if (ops->vidioc_s_fmt_vid_out_overlay)
 831                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
 832                                         fh, f);
 833                         break;
 834                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 835                         if (ops->vidioc_s_fmt_vbi_cap)
 836                                 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
 837                         break;
 838                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 839                         if (ops->vidioc_s_fmt_vbi_out)
 840                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
 841                         break;
 842                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 843                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
 844                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
 845                                                                         fh, f);
 846                         break;
 847                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 848                         if (ops->vidioc_s_fmt_sliced_vbi_out)
 849                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
 850                                                                         fh, f);
 851                         break;
 852                 case V4L2_BUF_TYPE_PRIVATE:
 853                         if (ops->vidioc_s_fmt_type_private)
 854                                 ret = ops->vidioc_s_fmt_type_private(file,
 855                                                                 fh, f);
 856                         break;
 857                 }
 858                 break;
 859         }
 860         case VIDIOC_TRY_FMT:
 861         {
 862                 struct v4l2_format *f = (struct v4l2_format *)arg;
 863
 864                 /* FIXME: Should be one dump per type */
 865                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 866                                                 v4l2_type_names));
 867                 switch (f->type) {
 868                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 869                         if (ops->vidioc_try_fmt_vid_cap)
 870                                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
 871                         if (!ret)
 872                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 873                         break;
 874                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 875                         if (ops->vidioc_try_fmt_vid_overlay)
 876                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
 877                                         fh, f);
 878                         break;
 879                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 880                         if (ops->vidioc_try_fmt_vid_out)
 881                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
 882                         if (!ret)
 883                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 884                         break;
 885                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 886                         if (ops->vidioc_try_fmt_vid_out_overlay)
 887                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
 888                                        fh, f);
 889                         break;
 890                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 891                         if (ops->vidioc_try_fmt_vbi_cap)
 892                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
 893                         break;
 894                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 895                         if (ops->vidioc_try_fmt_vbi_out)
 896                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
 897                         break;
 898                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 899                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
 900                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
 901                                                                 fh, f);
 902                         break;
 903                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 904                         if (ops->vidioc_try_fmt_sliced_vbi_out)
 905                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
 906                                                                 fh, f);
 907                         break;
 908                 case V4L2_BUF_TYPE_PRIVATE:
 909                         if (ops->vidioc_try_fmt_type_private)
 910                                 ret = ops->vidioc_try_fmt_type_private(file,
 911                                                                 fh, f);
 912                         break;
 913                 }
 914
 915                 break;
 916         }
 917         /* FIXME: Those buf reqs could be handled here,
 918            with some changes on videobuf to allow its header to be included at
 919            videodev2.h or being merged at videodev2.
 920          */
 921         case VIDIOC_REQBUFS:
 922         {
 923                 struct v4l2_requestbuffers *p = arg;
 924
 925                 if (!ops->vidioc_reqbufs)
 926                         break;
 927                 ret = check_fmt(ops, p->type);
 928                 if (ret)
 929                         break;
 930
 931                 ret = ops->vidioc_reqbufs(file, fh, p);
 932                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
 933                                 p->count,
 934                                 prt_names(p->type, v4l2_type_names),
 935                                 prt_names(p->memory, v4l2_memory_names));
 936                 break;
 937         }
 938         case VIDIOC_QUERYBUF:
 939         {
 940                 struct v4l2_buffer *p = arg;
 941
 942                 if (!ops->vidioc_querybuf)
 943                         break;
 944                 ret = check_fmt(ops, p->type);
 945                 if (ret)
 946                         break;
 947
 948                 ret = ops->vidioc_querybuf(file, fh, p);
 949                 if (!ret)
 950                         dbgbuf(cmd, vfd, p);
 951                 break;
 952         }
 953         case VIDIOC_QBUF:
 954         {
 955                 struct v4l2_buffer *p = arg;
 956
 957                 if (!ops->vidioc_qbuf)
 958                         break;
 959                 ret = check_fmt(ops, p->type);
 960                 if (ret)
 961                         break;
 962
 963                 ret = ops->vidioc_qbuf(file, fh, p);
 964                 if (!ret)
 965                         dbgbuf(cmd, vfd, p);
 966                 break;
 967         }
 968         case VIDIOC_DQBUF:
 969         {
 970                 struct v4l2_buffer *p = arg;
 971
 972                 if (!ops->vidioc_dqbuf)
 973                         break;
 974                 ret = check_fmt(ops, p->type);
 975                 if (ret)
 976                         break;
 977
 978                 ret = ops->vidioc_dqbuf(file, fh, p);
 979                 if (!ret)
 980                         dbgbuf(cmd, vfd, p);
 981                 break;
 982         }
 983         case VIDIOC_OVERLAY:
 984         {
 985                 int *i = arg;
 986
 987                 if (!ops->vidioc_overlay)
 988                         break;
 989                 dbgarg(cmd, "value=%d\n", *i);
 990                 ret = ops->vidioc_overlay(file, fh, *i);
 991                 break;
 992         }
 993         case VIDIOC_G_FBUF:
 994         {
 995                 struct v4l2_framebuffer *p = arg;
 996
 997                 if (!ops->vidioc_g_fbuf)
 998                         break;
 999                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1000                 if (!ret) {
1001                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1002                                         p->capability, p->flags,
1003                                         (unsigned long)p->base);
1004                         v4l_print_pix_fmt(vfd, &p->fmt);
1005                 }
1006                 break;
1007         }
1008         case VIDIOC_S_FBUF:
1009         {
1010                 struct v4l2_framebuffer *p = arg;
1011
1012                 if (!ops->vidioc_s_fbuf)
1013                         break;
1014                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1015                         p->capability, p->flags, (unsigned long)p->base);
1016                 v4l_print_pix_fmt(vfd, &p->fmt);
1017                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1018                 break;
1019         }
1020         case VIDIOC_STREAMON:
1021         {
1022                 enum v4l2_buf_type i = *(int *)arg;
1023
1024                 if (!ops->vidioc_streamon)
1025                         break;
1026                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1027                 ret = ops->vidioc_streamon(file, fh, i);
1028                 break;
1029         }
1030         case VIDIOC_STREAMOFF:
1031         {
1032                 enum v4l2_buf_type i = *(int *)arg;
1033
1034                 if (!ops->vidioc_streamoff)
1035                         break;
1036                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1037                 ret = ops->vidioc_streamoff(file, fh, i);
1038                 break;
1039         }
1040         /* ---------- tv norms ---------- */
1041         case VIDIOC_ENUMSTD:
1042         {
1043                 struct v4l2_standard *p = arg;
1044                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1045                 unsigned int index = p->index, i, j = 0;
1046                 const char *descr = "";
1047
1048                 /* Return norm array in a canonical way */
1049                 for (i = 0; i <= index && id; i++) {
1050                         /* last std value in the standards array is 0, so this
1051                            while always ends there since (id & 0) == 0. */
1052                         while ((id & standards[j].std) != standards[j].std)
1053                                 j++;
1054                         curr_id = standards[j].std;
1055                         descr = standards[j].descr;
1056                         j++;
1057                         if (curr_id == 0)
1058                                 break;
1059                         if (curr_id != V4L2_STD_PAL &&
1060                             curr_id != V4L2_STD_SECAM &&
1061                             curr_id != V4L2_STD_NTSC)
1062                                 id &= ~curr_id;
1063                 }
1064                 if (i <= index)
1065                         return -EINVAL;
1066
1067                 v4l2_video_std_construct(p, curr_id, descr);
1068
1069                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1070                                 "framelines=%d\n", p->index,
1071                                 (unsigned long long)p->id, p->name,
1072                                 p->frameperiod.numerator,
1073                                 p->frameperiod.denominator,
1074                                 p->framelines);
1075
1076                 ret = 0;
1077                 break;
1078         }
1079         case VIDIOC_G_STD:
1080         {
1081                 v4l2_std_id *id = arg;
1082
1083                 ret = 0;
1084                 /* Calls the specific handler */
1085                 if (ops->vidioc_g_std)
1086                         ret = ops->vidioc_g_std(file, fh, id);
1087                 else
1088                         *id = vfd->current_norm;
1089
1090                 if (!ret)
1091                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1092                 break;
1093         }
1094         case VIDIOC_S_STD:
1095         {
1096                 v4l2_std_id *id = arg, norm;
1097
1098                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1099
1100                 norm = (*id) & vfd->tvnorms;
1101                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1102                         break;
1103
1104                 /* Calls the specific handler */
1105                 if (ops->vidioc_s_std)
1106                         ret = ops->vidioc_s_std(file, fh, &norm);
1107                 else
1108                         ret = -EINVAL;
1109
1110                 /* Updates standard information */
1111                 if (ret >= 0)
1112                         vfd->current_norm = norm;
1113                 break;
1114         }
1115         case VIDIOC_QUERYSTD:
1116         {
1117                 v4l2_std_id *p = arg;
1118
1119                 if (!ops->vidioc_querystd)
1120                         break;
1121                 ret = ops->vidioc_querystd(file, fh, arg);
1122                 if (!ret)
1123                         dbgarg(cmd, "detected std=%08Lx\n",
1124                                                 (unsigned long long)*p);
1125                 break;
1126         }
1127         /* ------ input switching ---------- */
1128         /* FIXME: Inputs can be handled inside videodev2 */
1129         case VIDIOC_ENUMINPUT:
1130         {
1131                 struct v4l2_input *p = arg;
1132
1133                 if (!ops->vidioc_enum_input)
1134                         break;
1135
1136                 ret = ops->vidioc_enum_input(file, fh, p);
1137                 if (!ret)
1138                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1139                                 "audioset=%d, "
1140                                 "tuner=%d, std=%08Lx, status=%d\n",
1141                                 p->index, p->name, p->type, p->audioset,
1142                                 p->tuner,
1143                                 (unsigned long long)p->std,
1144                                 p->status);
1145                 break;
1146         }
1147         case VIDIOC_G_INPUT:
1148         {
1149                 unsigned int *i = arg;
1150
1151                 if (!ops->vidioc_g_input)
1152                         break;
1153                 ret = ops->vidioc_g_input(file, fh, i);
1154                 if (!ret)
1155                         dbgarg(cmd, "value=%d\n", *i);
1156                 break;
1157         }
1158         case VIDIOC_S_INPUT:
1159         {
1160                 unsigned int *i = arg;
1161
1162                 if (!ops->vidioc_s_input)
1163                         break;
1164                 dbgarg(cmd, "value=%d\n", *i);
1165                 ret = ops->vidioc_s_input(file, fh, *i);
1166                 break;
1167         }
1168
1169         /* ------ output switching ---------- */
1170         case VIDIOC_ENUMOUTPUT:
1171         {
1172                 struct v4l2_output *p = arg;
1173
1174                 if (!ops->vidioc_enum_output)
1175                         break;
1176
1177                 ret = ops->vidioc_enum_output(file, fh, p);
1178                 if (!ret)
1179                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1180                                 "audioset=0x%x, "
1181                                 "modulator=%d, std=0x%08Lx\n",
1182                                 p->index, p->name, p->type, p->audioset,
1183                                 p->modulator, (unsigned long long)p->std);
1184                 break;
1185         }
1186         case VIDIOC_G_OUTPUT:
1187         {
1188                 unsigned int *i = arg;
1189
1190                 if (!ops->vidioc_g_output)
1191                         break;
1192                 ret = ops->vidioc_g_output(file, fh, i);
1193                 if (!ret)
1194                         dbgarg(cmd, "value=%d\n", *i);
1195                 break;
1196         }
1197         case VIDIOC_S_OUTPUT:
1198         {
1199                 unsigned int *i = arg;
1200
1201                 if (!ops->vidioc_s_output)
1202                         break;
1203                 dbgarg(cmd, "value=%d\n", *i);
1204                 ret = ops->vidioc_s_output(file, fh, *i);
1205                 break;
1206         }
1207
1208         /* --- controls ---------------------------------------------- */
1209         case VIDIOC_QUERYCTRL:
1210         {
1211                 struct v4l2_queryctrl *p = arg;
1212
1213                 if (!ops->vidioc_queryctrl)
1214                         break;
1215                 ret = ops->vidioc_queryctrl(file, fh, p);
1216                 if (!ret)
1217                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1218                                         "step=%d, default=%d, flags=0x%08x\n",
1219                                         p->id, p->type, p->name,
1220                                         p->minimum, p->maximum,
1221                                         p->step, p->default_value, p->flags);
1222                 else
1223                         dbgarg(cmd, "id=0x%x\n", p->id);
1224                 break;
1225         }
1226         case VIDIOC_G_CTRL:
1227         {
1228                 struct v4l2_control *p = arg;
1229
1230                 if (ops->vidioc_g_ctrl)
1231                         ret = ops->vidioc_g_ctrl(file, fh, p);
1232                 else if (ops->vidioc_g_ext_ctrls) {
1233                         struct v4l2_ext_controls ctrls;
1234                         struct v4l2_ext_control ctrl;
1235
1236                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1237                         ctrls.count = 1;
1238                         ctrls.controls = &ctrl;
1239                         ctrl.id = p->id;
1240                         ctrl.value = p->value;
1241                         if (check_ext_ctrls(&ctrls, 1)) {
1242                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1243                                 if (ret == 0)
1244                                         p->value = ctrl.value;
1245                         }
1246                 } else
1247                         break;
1248                 if (!ret)
1249                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1250                 else
1251                         dbgarg(cmd, "id=0x%x\n", p->id);
1252                 break;
1253         }
1254         case VIDIOC_S_CTRL:
1255         {
1256                 struct v4l2_control *p = arg;
1257                 struct v4l2_ext_controls ctrls;
1258                 struct v4l2_ext_control ctrl;
1259
1260                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1261                         break;
1262
1263                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1264
1265                 if (ops->vidioc_s_ctrl) {
1266                         ret = ops->vidioc_s_ctrl(file, fh, p);
1267                         break;
1268                 }
1269                 if (!ops->vidioc_s_ext_ctrls)
1270                         break;
1271
1272                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1273                 ctrls.count = 1;
1274                 ctrls.controls = &ctrl;
1275                 ctrl.id = p->id;
1276                 ctrl.value = p->value;
1277                 if (check_ext_ctrls(&ctrls, 1))
1278                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1279                 break;
1280         }
1281         case VIDIOC_G_EXT_CTRLS:
1282         {
1283                 struct v4l2_ext_controls *p = arg;
1284
1285                 p->error_idx = p->count;
1286                 if (!ops->vidioc_g_ext_ctrls)
1287                         break;
1288                 if (check_ext_ctrls(p, 0))
1289                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1290                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1291                 break;
1292         }
1293         case VIDIOC_S_EXT_CTRLS:
1294         {
1295                 struct v4l2_ext_controls *p = arg;
1296
1297                 p->error_idx = p->count;
1298                 if (!ops->vidioc_s_ext_ctrls)
1299                         break;
1300                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1301                 if (check_ext_ctrls(p, 0))
1302                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1303                 break;
1304         }
1305         case VIDIOC_TRY_EXT_CTRLS:
1306         {
1307                 struct v4l2_ext_controls *p = arg;
1308
1309                 p->error_idx = p->count;
1310                 if (!ops->vidioc_try_ext_ctrls)
1311                         break;
1312                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1313                 if (check_ext_ctrls(p, 0))
1314                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1315                 break;
1316         }
1317         case VIDIOC_QUERYMENU:
1318         {
1319                 struct v4l2_querymenu *p = arg;
1320
1321                 if (!ops->vidioc_querymenu)
1322                         break;
1323                 ret = ops->vidioc_querymenu(file, fh, p);
1324                 if (!ret)
1325                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1326                                 p->id, p->index, p->name);
1327                 else
1328                         dbgarg(cmd, "id=0x%x, index=%d\n",
1329                                 p->id, p->index);
1330                 break;
1331         }
1332         /* --- audio ---------------------------------------------- */
1333         case VIDIOC_ENUMAUDIO:
1334         {
1335                 struct v4l2_audio *p = arg;
1336
1337                 if (!ops->vidioc_enumaudio)
1338                         break;
1339                 ret = ops->vidioc_enumaudio(file, fh, p);
1340                 if (!ret)
1341                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1342                                         "mode=0x%x\n", p->index, p->name,
1343                                         p->capability, p->mode);
1344                 else
1345                         dbgarg(cmd, "index=%d\n", p->index);
1346                 break;
1347         }
1348         case VIDIOC_G_AUDIO:
1349         {
1350                 struct v4l2_audio *p = arg;
1351
1352                 if (!ops->vidioc_g_audio)
1353                         break;
1354
1355                 ret = ops->vidioc_g_audio(file, fh, p);
1356                 if (!ret)
1357                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1358                                         "mode=0x%x\n", p->index,
1359                                         p->name, p->capability, p->mode);
1360                 else
1361                         dbgarg(cmd, "index=%d\n", p->index);
1362                 break;
1363         }
1364         case VIDIOC_S_AUDIO:
1365         {
1366                 struct v4l2_audio *p = arg;
1367
1368                 if (!ops->vidioc_s_audio)
1369                         break;
1370                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1371                                         "mode=0x%x\n", p->index, p->name,
1372                                         p->capability, p->mode);
1373                 ret = ops->vidioc_s_audio(file, fh, p);
1374                 break;
1375         }
1376         case VIDIOC_ENUMAUDOUT:
1377         {
1378                 struct v4l2_audioout *p = arg;
1379
1380                 if (!ops->vidioc_enumaudout)
1381                         break;
1382                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1383                 ret = ops->vidioc_enumaudout(file, fh, p);
1384                 if (!ret)
1385                         dbgarg2("index=%d, name=%s, capability=%d, "
1386                                         "mode=%d\n", p->index, p->name,
1387                                         p->capability, p->mode);
1388                 break;
1389         }
1390         case VIDIOC_G_AUDOUT:
1391         {
1392                 struct v4l2_audioout *p = arg;
1393
1394                 if (!ops->vidioc_g_audout)
1395                         break;
1396
1397                 ret = ops->vidioc_g_audout(file, fh, p);
1398                 if (!ret)
1399                         dbgarg2("index=%d, name=%s, capability=%d, "
1400                                         "mode=%d\n", p->index, p->name,
1401                                         p->capability, p->mode);
1402                 break;
1403         }
1404         case VIDIOC_S_AUDOUT:
1405         {
1406                 struct v4l2_audioout *p = arg;
1407
1408                 if (!ops->vidioc_s_audout)
1409                         break;
1410                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1411                                         "mode=%d\n", p->index, p->name,
1412                                         p->capability, p->mode);
1413
1414                 ret = ops->vidioc_s_audout(file, fh, p);
1415                 break;
1416         }
1417         case VIDIOC_G_MODULATOR:
1418         {
1419                 struct v4l2_modulator *p = arg;
1420
1421                 if (!ops->vidioc_g_modulator)
1422                         break;
1423                 ret = ops->vidioc_g_modulator(file, fh, p);
1424                 if (!ret)
1425                         dbgarg(cmd, "index=%d, name=%s, "
1426                                         "capability=%d, rangelow=%d,"
1427                                         " rangehigh=%d, txsubchans=%d\n",
1428                                         p->index, p->name, p->capability,
1429                                         p->rangelow, p->rangehigh,
1430                                         p->txsubchans);
1431                 break;
1432         }
1433         case VIDIOC_S_MODULATOR:
1434         {
1435                 struct v4l2_modulator *p = arg;
1436
1437                 if (!ops->vidioc_s_modulator)
1438                         break;
1439                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1440                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1441                                 p->index, p->name, p->capability, p->rangelow,
1442                                 p->rangehigh, p->txsubchans);
1443                         ret = ops->vidioc_s_modulator(file, fh, p);
1444                 break;
1445         }
1446         case VIDIOC_G_CROP:
1447         {
1448                 struct v4l2_crop *p = arg;
1449
1450                 if (!ops->vidioc_g_crop)
1451                         break;
1452
1453                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1454                 ret = ops->vidioc_g_crop(file, fh, p);
1455                 if (!ret)
1456                         dbgrect(vfd, "", &p->c);
1457                 break;
1458         }
1459         case VIDIOC_S_CROP:
1460         {
1461                 struct v4l2_crop *p = arg;
1462
1463                 if (!ops->vidioc_s_crop)
1464                         break;
1465                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1466                 dbgrect(vfd, "", &p->c);
1467                 ret = ops->vidioc_s_crop(file, fh, p);
1468                 break;
1469         }
1470         case VIDIOC_CROPCAP:
1471         {
1472                 struct v4l2_cropcap *p = arg;
1473
1474                 /*FIXME: Should also show v4l2_fract pixelaspect */
1475                 if (!ops->vidioc_cropcap)
1476                         break;
1477
1478                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1479                 ret = ops->vidioc_cropcap(file, fh, p);
1480                 if (!ret) {
1481                         dbgrect(vfd, "bounds ", &p->bounds);
1482                         dbgrect(vfd, "defrect ", &p->defrect);
1483                 }
1484                 break;
1485         }
1486         case VIDIOC_G_JPEGCOMP:
1487         {
1488                 struct v4l2_jpegcompression *p = arg;
1489
1490                 if (!ops->vidioc_g_jpegcomp)
1491                         break;
1492
1493                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1494                 if (!ret)
1495                         dbgarg(cmd, "quality=%d, APPn=%d, "
1496                                         "APP_len=%d, COM_len=%d, "
1497                                         "jpeg_markers=%d\n",
1498                                         p->quality, p->APPn, p->APP_len,
1499                                         p->COM_len, p->jpeg_markers);
1500                 break;
1501         }
1502         case VIDIOC_S_JPEGCOMP:
1503         {
1504                 struct v4l2_jpegcompression *p = arg;
1505
1506                 if (!ops->vidioc_g_jpegcomp)
1507                         break;
1508                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1509                                         "COM_len=%d, jpeg_markers=%d\n",
1510                                         p->quality, p->APPn, p->APP_len,
1511                                         p->COM_len, p->jpeg_markers);
1512                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1513                 break;
1514         }
1515         case VIDIOC_G_ENC_INDEX:
1516         {
1517                 struct v4l2_enc_idx *p = arg;
1518
1519                 if (!ops->vidioc_g_enc_index)
1520                         break;
1521                 ret = ops->vidioc_g_enc_index(file, fh, p);
1522                 if (!ret)
1523                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1524                                         p->entries, p->entries_cap);
1525                 break;
1526         }
1527         case VIDIOC_ENCODER_CMD:
1528         {
1529                 struct v4l2_encoder_cmd *p = arg;
1530
1531                 if (!ops->vidioc_encoder_cmd)
1532                         break;
1533                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1534                 if (!ret)
1535                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1536                 break;
1537         }
1538         case VIDIOC_TRY_ENCODER_CMD:
1539         {
1540                 struct v4l2_encoder_cmd *p = arg;
1541
1542                 if (!ops->vidioc_try_encoder_cmd)
1543                         break;
1544                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1545                 if (!ret)
1546                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1547                 break;
1548         }
1549         case VIDIOC_G_PARM:
1550         {
1551                 struct v4l2_streamparm *p = arg;
1552
1553                 if (ops->vidioc_g_parm) {
1554                         ret = check_fmt(ops, p->type);
1555                         if (ret)
1556                                 break;
1557                         ret = ops->vidioc_g_parm(file, fh, p);
1558                 } else {
1559                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1560                                 return -EINVAL;
1561
1562                         v4l2_video_std_frame_period(vfd->current_norm,
1563                                                     &p->parm.capture.timeperframe);
1564                         ret = 0;
1565                 }
1566
1567                 dbgarg(cmd, "type=%d\n", p->type);
1568                 break;
1569         }
1570         case VIDIOC_S_PARM:
1571         {
1572                 struct v4l2_streamparm *p = arg;
1573
1574                 if (!ops->vidioc_s_parm)
1575                         break;
1576                 ret = check_fmt(ops, p->type);
1577                 if (ret)
1578                         break;
1579
1580                 dbgarg(cmd, "type=%d\n", p->type);
1581                 ret = ops->vidioc_s_parm(file, fh, p);
1582                 break;
1583         }
1584         case VIDIOC_G_TUNER:
1585         {
1586                 struct v4l2_tuner *p = arg;
1587
1588                 if (!ops->vidioc_g_tuner)
1589                         break;
1590
1591                 ret = ops->vidioc_g_tuner(file, fh, p);
1592                 if (!ret)
1593                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1594                                         "capability=0x%x, rangelow=%d, "
1595                                         "rangehigh=%d, signal=%d, afc=%d, "
1596                                         "rxsubchans=0x%x, audmode=%d\n",
1597                                         p->index, p->name, p->type,
1598                                         p->capability, p->rangelow,
1599                                         p->rangehigh, p->signal, p->afc,
1600                                         p->rxsubchans, p->audmode);
1601                 break;
1602         }
1603         case VIDIOC_S_TUNER:
1604         {
1605                 struct v4l2_tuner *p = arg;
1606
1607                 if (!ops->vidioc_s_tuner)
1608                         break;
1609                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1610                                 "capability=0x%x, rangelow=%d, "
1611                                 "rangehigh=%d, signal=%d, afc=%d, "
1612                                 "rxsubchans=0x%x, audmode=%d\n",
1613                                 p->index, p->name, p->type,
1614                                 p->capability, p->rangelow,
1615                                 p->rangehigh, p->signal, p->afc,
1616                                 p->rxsubchans, p->audmode);
1617                 ret = ops->vidioc_s_tuner(file, fh, p);
1618                 break;
1619         }
1620         case VIDIOC_G_FREQUENCY:
1621         {
1622                 struct v4l2_frequency *p = arg;
1623
1624                 if (!ops->vidioc_g_frequency)
1625                         break;
1626
1627                 ret = ops->vidioc_g_frequency(file, fh, p);
1628                 if (!ret)
1629                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1630                                         p->tuner, p->type, p->frequency);
1631                 break;
1632         }
1633         case VIDIOC_S_FREQUENCY:
1634         {
1635                 struct v4l2_frequency *p = arg;
1636
1637                 if (!ops->vidioc_s_frequency)
1638                         break;
1639                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1640                                 p->tuner, p->type, p->frequency);
1641                 ret = ops->vidioc_s_frequency(file, fh, p);
1642                 break;
1643         }
1644         case VIDIOC_G_SLICED_VBI_CAP:
1645         {
1646                 struct v4l2_sliced_vbi_cap *p = arg;
1647
1648                 if (!ops->vidioc_g_sliced_vbi_cap)
1649                         break;
1650
1651                 /* Clear up to type, everything after type is zerod already */
1652                 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1653
1654                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1655                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1656                 if (!ret)
1657                         dbgarg2("service_set=%d\n", p->service_set);
1658                 break;
1659         }
1660         case VIDIOC_LOG_STATUS:
1661         {
1662                 if (!ops->vidioc_log_status)
1663                         break;
1664                 ret = ops->vidioc_log_status(file, fh);
1665                 break;
1666         }
1667 #ifdef CONFIG_VIDEO_ADV_DEBUG
1668         case VIDIOC_DBG_G_REGISTER:
1669         {
1670                 struct v4l2_dbg_register *p = arg;
1671
1672                 if (!capable(CAP_SYS_ADMIN))
1673                         ret = -EPERM;
1674                 else if (ops->vidioc_g_register)
1675                         ret = ops->vidioc_g_register(file, fh, p);
1676                 break;
1677         }
1678         case VIDIOC_DBG_S_REGISTER:
1679         {
1680                 struct v4l2_dbg_register *p = arg;
1681
1682                 if (!capable(CAP_SYS_ADMIN))
1683                         ret = -EPERM;
1684                 else if (ops->vidioc_s_register)
1685                         ret = ops->vidioc_s_register(file, fh, p);
1686                 break;
1687         }
1688 #endif
1689         case VIDIOC_DBG_G_CHIP_IDENT:
1690         {
1691                 struct v4l2_dbg_chip_ident *p = arg;
1692
1693                 if (!ops->vidioc_g_chip_ident)
1694                         break;
1695                 p->ident = V4L2_IDENT_NONE;
1696                 p->revision = 0;
1697                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1698                 if (!ret)
1699                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1700                 break;
1701         }
1702         case VIDIOC_S_HW_FREQ_SEEK:
1703         {
1704                 struct v4l2_hw_freq_seek *p = arg;
1705
1706                 if (!ops->vidioc_s_hw_freq_seek)
1707                         break;
1708                 dbgarg(cmd,
1709                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1710                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1711                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1712                 break;
1713         }
1714         case VIDIOC_ENUM_FRAMESIZES:
1715         {
1716                 struct v4l2_frmsizeenum *p = arg;
1717
1718                 if (!ops->vidioc_enum_framesizes)
1719                         break;
1720
1721                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1722                 dbgarg(cmd,
1723                         "index=%d, pixelformat=%d, type=%d ",
1724                         p->index, p->pixel_format, p->type);
1725                 switch (p->type) {
1726                 case V4L2_FRMSIZE_TYPE_DISCRETE:
1727                         dbgarg2("width = %d, height=%d\n",
1728                                 p->discrete.width, p->discrete.height);
1729                         break;
1730                 case V4L2_FRMSIZE_TYPE_STEPWISE:
1731                         dbgarg2("min %dx%d, max %dx%d, step %dx%d\n",
1732                                 p->stepwise.min_width,  p->stepwise.min_height,
1733                                 p->stepwise.step_width, p->stepwise.step_height,
1734                                 p->stepwise.max_width,  p->stepwise.max_height);
1735                         break;
1736                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1737                         dbgarg2("continuous\n");
1738                         break;
1739                 default:
1740                         dbgarg2("- Unknown type!\n");
1741                 }
1742
1743                 break;
1744         }
1745         case VIDIOC_ENUM_FRAMEINTERVALS:
1746         {
1747                 struct v4l2_frmivalenum *p = arg;
1748
1749                 if (!ops->vidioc_enum_frameintervals)
1750                         break;
1751
1752                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1753                 dbgarg(cmd,
1754                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1755                         p->index, p->pixel_format,
1756                         p->width, p->height, p->type);
1757                 switch (p->type) {
1758                 case V4L2_FRMIVAL_TYPE_DISCRETE:
1759                         dbgarg2("fps=%d/%d\n",
1760                                 p->discrete.numerator,
1761                                 p->discrete.denominator);
1762                         break;
1763                 case V4L2_FRMIVAL_TYPE_STEPWISE:
1764                         dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1765                                 p->stepwise.min.numerator,
1766                                 p->stepwise.min.denominator,
1767                                 p->stepwise.max.numerator,
1768                                 p->stepwise.max.denominator,
1769                                 p->stepwise.step.numerator,
1770                                 p->stepwise.step.denominator);
1771                         break;
1772                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1773                         dbgarg2("continuous\n");
1774                         break;
1775                 default:
1776                         dbgarg2("- Unknown type!\n");
1777                 }
1778                 break;
1779         }
1780
1781         default:
1782         {
1783                 if (!ops->vidioc_default)
1784                         break;
1785                 ret = ops->vidioc_default(file, fh, cmd, arg);
1786                 break;
1787         }
1788         } /* switch */
1789
1790         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1791                 if (ret < 0) {
1792                         v4l_print_ioctl(vfd->name, cmd);
1793                         printk(KERN_CONT " error %ld\n", ret);
1794                 }
1795         }
1796
1797         return ret;
1798 }
1799
1800 /* In some cases, only a few fields are used as input, i.e. when the app sets
1801  * "index" and then the driver fills in the rest of the structure for the thing
1802  * with that index.  We only need to copy up the first non-input field.  */
1803 static unsigned long cmd_input_size(unsigned int cmd)
1804 {
1805         /* Size of structure up to and including 'field' */
1806 #define CMDINSIZE(cmd, type, field)                             \
1807         case VIDIOC_##cmd:                                      \
1808                 return offsetof(struct v4l2_##type, field) +    \
1809                         sizeof(((struct v4l2_##type *)0)->field);
1810
1811         switch (cmd) {
1812                 CMDINSIZE(ENUM_FMT,             fmtdesc,        type);
1813                 CMDINSIZE(G_FMT,                format,         type);
1814                 CMDINSIZE(QUERYBUF,             buffer,         type);
1815                 CMDINSIZE(G_PARM,               streamparm,     type);
1816                 CMDINSIZE(ENUMSTD,              standard,       index);
1817                 CMDINSIZE(ENUMINPUT,            input,          index);
1818                 CMDINSIZE(G_CTRL,               control,        id);
1819                 CMDINSIZE(G_TUNER,              tuner,          index);
1820                 CMDINSIZE(QUERYCTRL,            queryctrl,      id);
1821                 CMDINSIZE(QUERYMENU,            querymenu,      index);
1822                 CMDINSIZE(ENUMOUTPUT,           output,         index);
1823                 CMDINSIZE(G_MODULATOR,          modulator,      index);
1824                 CMDINSIZE(G_FREQUENCY,          frequency,      tuner);
1825                 CMDINSIZE(CROPCAP,              cropcap,        type);
1826                 CMDINSIZE(G_CROP,               crop,           type);
1827                 CMDINSIZE(ENUMAUDIO,            audio,          index);
1828                 CMDINSIZE(ENUMAUDOUT,           audioout,       index);
1829                 CMDINSIZE(ENCODER_CMD,          encoder_cmd,    flags);
1830                 CMDINSIZE(TRY_ENCODER_CMD,      encoder_cmd,    flags);
1831                 CMDINSIZE(G_SLICED_VBI_CAP,     sliced_vbi_cap, type);
1832                 CMDINSIZE(ENUM_FRAMESIZES,      frmsizeenum,    pixel_format);
1833                 CMDINSIZE(ENUM_FRAMEINTERVALS,  frmivalenum,    height);
1834         default:
1835                 return _IOC_SIZE(cmd);
1836         }
1837 }
1838
1839 long video_ioctl2(struct file *file,
1840                unsigned int cmd, unsigned long arg)
1841 {
1842         char    sbuf[128];
1843         void    *mbuf = NULL;
1844         void    *parg = NULL;
1845         long    err  = -EINVAL;
1846         int     is_ext_ctrl;
1847         size_t  ctrls_size = 0;
1848         void __user *user_ptr = NULL;
1849
1850 #ifdef __OLD_VIDIOC_
1851         cmd = video_fix_command(cmd);
1852 #endif
1853         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1854                        cmd == VIDIOC_TRY_EXT_CTRLS);
1855
1856         /*  Copy arguments into temp kernel buffer  */
1857         if (_IOC_DIR(cmd) != _IOC_NONE) {
1858                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1859                         parg = sbuf;
1860                 } else {
1861                         /* too big to allocate from stack */
1862                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1863                         if (NULL == mbuf)
1864                                 return -ENOMEM;
1865                         parg = mbuf;
1866                 }
1867
1868                 err = -EFAULT;
1869                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
1870                         unsigned long n = cmd_input_size(cmd);
1871
1872                         if (copy_from_user(parg, (void __user *)arg, n))
1873                                 goto out;
1874
1875                         /* zero out anything we don't copy from userspace */
1876                         if (n < _IOC_SIZE(cmd))
1877                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
1878                 } else {
1879                         /* read-only ioctl */
1880                         memset(parg, 0, _IOC_SIZE(cmd));
1881                 }
1882         }
1883
1884         if (is_ext_ctrl) {
1885                 struct v4l2_ext_controls *p = parg;
1886
1887                 /* In case of an error, tell the caller that it wasn't
1888                    a specific control that caused it. */
1889                 p->error_idx = p->count;
1890                 user_ptr = (void __user *)p->controls;
1891                 if (p->count) {
1892                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1893                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1894                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1895                         err = -ENOMEM;
1896                         if (NULL == mbuf)
1897                                 goto out_ext_ctrl;
1898                         err = -EFAULT;
1899                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1900                                 goto out_ext_ctrl;
1901                         p->controls = mbuf;
1902                 }
1903         }
1904
1905         /* Handles IOCTL */
1906         err = __video_do_ioctl(file, cmd, parg);
1907         if (err == -ENOIOCTLCMD)
1908                 err = -EINVAL;
1909         if (is_ext_ctrl) {
1910                 struct v4l2_ext_controls *p = parg;
1911
1912                 p->controls = (void *)user_ptr;
1913                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1914                         err = -EFAULT;
1915                 goto out_ext_ctrl;
1916         }
1917         if (err < 0)
1918                 goto out;
1919
1920 out_ext_ctrl:
1921         /*  Copy results into user buffer  */
1922         switch (_IOC_DIR(cmd)) {
1923         case _IOC_READ:
1924         case (_IOC_WRITE | _IOC_READ):
1925                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1926                         err = -EFAULT;
1927                 break;
1928         }
1929
1930 out:
1931         kfree(mbuf);
1932         return err;
1933 }
1934 EXPORT_SYMBOL(video_ioctl2);