SAFE public projects git trees. - safe/jmp/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/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19
  20 #define __OLD_VIDIOC_ /* To allow fixing old calls */
  21 #include <linux/videodev.h>
  22 #include <linux/videodev2.h>
  23
  24 #ifdef CONFIG_VIDEO_V4L1
  25 #include <linux/videodev.h>
  26 #endif
  27 #include <media/v4l2-common.h>
  28 #include <media/v4l2-ioctl.h>
  29 #include <media/v4l2-chip-ident.h>
  30
  31 #define dbgarg(cmd, fmt, arg...) \
  32                 do {                                                    \
  33                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {            \
  34                         printk(KERN_DEBUG "%s: ",  vfd->name);          \
  35                         v4l_printk_ioctl(cmd);                          \
  36                         printk(" " fmt,  ## arg);                       \
  37                     }                                                   \
  38                 } while (0)
  39
  40 #define dbgarg2(fmt, arg...) \
  41                 do {                                                    \
  42                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  43                         printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
  44                 } while (0)
  45
  46 #define dbgarg3(fmt, arg...) \
  47                 do {                                                    \
  48                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  49                         printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
  50                 } while (0)
  51
  52 /* Zero out the end of the struct pointed to by p.  Everthing after, but
  53  * not including, the specified field is cleared. */
  54 #define CLEAR_AFTER_FIELD(p, field) \
  55         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  56         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  57
  58 struct std_descr {
  59         v4l2_std_id std;
  60         const char *descr;
  61 };
  62
  63 static const struct std_descr standards[] = {
  64         { V4L2_STD_NTSC,        "NTSC"      },
  65         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  66         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  67         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  68         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  69         { V4L2_STD_PAL,         "PAL"       },
  70         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  71         { V4L2_STD_PAL_B,       "PAL-B"     },
  72         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  73         { V4L2_STD_PAL_G,       "PAL-G"     },
  74         { V4L2_STD_PAL_H,       "PAL-H"     },
  75         { V4L2_STD_PAL_I,       "PAL-I"     },
  76         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  77         { V4L2_STD_PAL_D,       "PAL-D"     },
  78         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  79         { V4L2_STD_PAL_K,       "PAL-K"     },
  80         { V4L2_STD_PAL_M,       "PAL-M"     },
  81         { V4L2_STD_PAL_N,       "PAL-N"     },
  82         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  83         { V4L2_STD_PAL_60,      "PAL-60"    },
  84         { V4L2_STD_SECAM,       "SECAM"     },
  85         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  86         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  87         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  88         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  89         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  90         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  91         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  92         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  93         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  94         { 0,                    "Unknown"   }
  95 };
  96
  97 /* video4linux standard ID conversion to standard name
  98  */
  99 const char *v4l2_norm_to_name(v4l2_std_id id)
 100 {
 101         u32 myid = id;
 102         int i;
 103
 104         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
 105            64 bit comparations. So, on that architecture, with some gcc
 106            variants, compilation fails. Currently, the max value is 30bit wide.
 107          */
 108         BUG_ON(myid != id);
 109
 110         for (i = 0; standards[i].std; i++)
 111                 if (myid == standards[i].std)
 112                         break;
 113         return standards[i].descr;
 114 }
 115 EXPORT_SYMBOL(v4l2_norm_to_name);
 116
 117 /* Returns frame period for the given standard */
 118 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 119 {
 120         if (id & V4L2_STD_525_60) {
 121                 frameperiod->numerator = 1001;
 122                 frameperiod->denominator = 30000;
 123         } else {
 124                 frameperiod->numerator = 1;
 125                 frameperiod->denominator = 25;
 126         }
 127 }
 128 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 129
 130 /* Fill in the fields of a v4l2_standard structure according to the
 131    'id' and 'transmission' parameters.  Returns negative on error.  */
 132 int v4l2_video_std_construct(struct v4l2_standard *vs,
 133                              int id, const char *name)
 134 {
 135         vs->id = id;
 136         v4l2_video_std_frame_period(id, &vs->frameperiod);
 137         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 138         strlcpy(vs->name, name, sizeof(vs->name));
 139         return 0;
 140 }
 141 EXPORT_SYMBOL(v4l2_video_std_construct);
 142
 143 /* ----------------------------------------------------------------- */
 144 /* some arrays for pretty-printing debug messages of enum types      */
 145
 146 const char *v4l2_field_names[] = {
 147         [V4L2_FIELD_ANY]        = "any",
 148         [V4L2_FIELD_NONE]       = "none",
 149         [V4L2_FIELD_TOP]        = "top",
 150         [V4L2_FIELD_BOTTOM]     = "bottom",
 151         [V4L2_FIELD_INTERLACED] = "interlaced",
 152         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 153         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 154         [V4L2_FIELD_ALTERNATE]  = "alternate",
 155         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 156         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 157 };
 158 EXPORT_SYMBOL(v4l2_field_names);
 159
 160 const char *v4l2_type_names[] = {
 161         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 162         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 163         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 164         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 165         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 166         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 167         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 168         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 169 };
 170 EXPORT_SYMBOL(v4l2_type_names);
 171
 172 static const char *v4l2_memory_names[] = {
 173         [V4L2_MEMORY_MMAP]    = "mmap",
 174         [V4L2_MEMORY_USERPTR] = "userptr",
 175         [V4L2_MEMORY_OVERLAY] = "overlay",
 176 };
 177
 178 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 179                            arr[a] : "unknown")
 180
 181 /* ------------------------------------------------------------------ */
 182 /* debug help functions                                               */
 183
 184 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 185 static const char *v4l1_ioctls[] = {
 186         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
 187         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
 188         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
 189         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
 190         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
 191         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
 192         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
 193         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
 194         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
 195         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
 196         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
 197         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
 198         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
 199         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
 200         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
 201         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
 202         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
 203         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
 204         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
 205         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
 206         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
 207         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
 208         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
 209         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
 210         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
 211         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
 212         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
 213         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
 214         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
 215 };
 216 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
 217 #endif
 218
 219 static const char *v4l2_ioctls[] = {
 220         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 221         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 222         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 223         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 224         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 225         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 226         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 227         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 228         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 229         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 230         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 231         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 232         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 233         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 234         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 235         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 236         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 237         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 238         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 239         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 240         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 241         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 242         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 243         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 244         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 245         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 246         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 247         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 248         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 249         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 250         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 251         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 252         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 253         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 254         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 255         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 256         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 257         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 258         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 259         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 260         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 261         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 262         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 263         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 264         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 265         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 266         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 267         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 268         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 269         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 270         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 271         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 272         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 273         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 274         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 275 #if 1
 276         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 277         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 278         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 279         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 280         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 281
 282         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 283         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 284
 285         [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
 286         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 287 #endif
 288         [_IOC_NR(VIDIOC_ENUM_DV_PRESETS)]  = "VIDIOC_ENUM_DV_PRESETS",
 289         [_IOC_NR(VIDIOC_S_DV_PRESET)]      = "VIDIOC_S_DV_PRESET",
 290         [_IOC_NR(VIDIOC_G_DV_PRESET)]      = "VIDIOC_G_DV_PRESET",
 291         [_IOC_NR(VIDIOC_QUERY_DV_PRESET)]  = "VIDIOC_QUERY_DV_PRESET",
 292         [_IOC_NR(VIDIOC_S_DV_TIMINGS)]     = "VIDIOC_S_DV_TIMINGS",
 293         [_IOC_NR(VIDIOC_G_DV_TIMINGS)]     = "VIDIOC_G_DV_TIMINGS",
 294 };
 295 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 296
 297 /* Common ioctl debug function. This function can be used by
 298    external ioctl messages as well as internal V4L ioctl */
 299 void v4l_printk_ioctl(unsigned int cmd)
 300 {
 301         char *dir, *type;
 302
 303         switch (_IOC_TYPE(cmd)) {
 304         case 'd':
 305                 type = "v4l2_int";
 306                 break;
 307 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 308         case 'v':
 309                 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
 310                         type = "v4l1";
 311                         break;
 312                 }
 313                 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
 314                 return;
 315 #endif
 316         case 'V':
 317                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
 318                         type = "v4l2";
 319                         break;
 320                 }
 321                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
 322                 return;
 323         default:
 324                 type = "unknown";
 325         }
 326
 327         switch (_IOC_DIR(cmd)) {
 328         case _IOC_NONE:              dir = "--"; break;
 329         case _IOC_READ:              dir = "r-"; break;
 330         case _IOC_WRITE:             dir = "-w"; break;
 331         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 332         default:                     dir = "*ERR*"; break;
 333         }
 334         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
 335                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 336 }
 337 EXPORT_SYMBOL(v4l_printk_ioctl);
 338
 339 /*
 340  * helper function -- handles userspace copying for ioctl arguments
 341  */
 342
 343 #ifdef __OLD_VIDIOC_
 344 static unsigned int
 345 video_fix_command(unsigned int cmd)
 346 {
 347         switch (cmd) {
 348         case VIDIOC_OVERLAY_OLD:
 349                 cmd = VIDIOC_OVERLAY;
 350                 break;
 351         case VIDIOC_S_PARM_OLD:
 352                 cmd = VIDIOC_S_PARM;
 353                 break;
 354         case VIDIOC_S_CTRL_OLD:
 355                 cmd = VIDIOC_S_CTRL;
 356                 break;
 357         case VIDIOC_G_AUDIO_OLD:
 358                 cmd = VIDIOC_G_AUDIO;
 359                 break;
 360         case VIDIOC_G_AUDOUT_OLD:
 361                 cmd = VIDIOC_G_AUDOUT;
 362                 break;
 363         case VIDIOC_CROPCAP_OLD:
 364                 cmd = VIDIOC_CROPCAP;
 365                 break;
 366         }
 367         return cmd;
 368 }
 369 #endif
 370
 371 /*
 372  * Obsolete usercopy function - Should be removed soon
 373  */
 374 long
 375 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 376                 v4l2_kioctl func)
 377 {
 378         char    sbuf[128];
 379         void    *mbuf = NULL;
 380         void    *parg = NULL;
 381         long    err  = -EINVAL;
 382         int     is_ext_ctrl;
 383         size_t  ctrls_size = 0;
 384         void __user *user_ptr = NULL;
 385
 386 #ifdef __OLD_VIDIOC_
 387         cmd = video_fix_command(cmd);
 388 #endif
 389         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
 390                        cmd == VIDIOC_TRY_EXT_CTRLS);
 391
 392         /*  Copy arguments into temp kernel buffer  */
 393         switch (_IOC_DIR(cmd)) {
 394         case _IOC_NONE:
 395                 parg = NULL;
 396                 break;
 397         case _IOC_READ:
 398         case _IOC_WRITE:
 399         case (_IOC_WRITE | _IOC_READ):
 400                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
 401                         parg = sbuf;
 402                 } else {
 403                         /* too big to allocate from stack */
 404                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
 405                         if (NULL == mbuf)
 406                                 return -ENOMEM;
 407                         parg = mbuf;
 408                 }
 409
 410                 err = -EFAULT;
 411                 if (_IOC_DIR(cmd) & _IOC_WRITE)
 412                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
 413                                 goto out;
 414                 break;
 415         }
 416         if (is_ext_ctrl) {
 417                 struct v4l2_ext_controls *p = parg;
 418
 419                 /* In case of an error, tell the caller that it wasn't
 420                    a specific control that caused it. */
 421                 p->error_idx = p->count;
 422                 user_ptr = (void __user *)p->controls;
 423                 if (p->count) {
 424                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
 425                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
 426                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
 427                         err = -ENOMEM;
 428                         if (NULL == mbuf)
 429                                 goto out_ext_ctrl;
 430                         err = -EFAULT;
 431                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
 432                                 goto out_ext_ctrl;
 433                         p->controls = mbuf;
 434                 }
 435         }
 436
 437         /* call driver */
 438         err = func(file, cmd, parg);
 439         if (err == -ENOIOCTLCMD)
 440                 err = -EINVAL;
 441         if (is_ext_ctrl) {
 442                 struct v4l2_ext_controls *p = parg;
 443
 444                 p->controls = (void *)user_ptr;
 445                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
 446                         err = -EFAULT;
 447                 goto out_ext_ctrl;
 448         }
 449         if (err < 0)
 450                 goto out;
 451
 452 out_ext_ctrl:
 453         /*  Copy results into user buffer  */
 454         switch (_IOC_DIR(cmd)) {
 455         case _IOC_READ:
 456         case (_IOC_WRITE | _IOC_READ):
 457                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
 458                         err = -EFAULT;
 459                 break;
 460         }
 461
 462 out:
 463         kfree(mbuf);
 464         return err;
 465 }
 466 EXPORT_SYMBOL(video_usercopy);
 467
 468 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 469                                         struct v4l2_buffer *p)
 470 {
 471         struct v4l2_timecode *tc = &p->timecode;
 472
 473         dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 474                 "bytesused=%d, flags=0x%08d, "
 475                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
 476                         p->timestamp.tv_sec / 3600,
 477                         (int)(p->timestamp.tv_sec / 60) % 60,
 478                         (int)(p->timestamp.tv_sec % 60),
 479                         (long)p->timestamp.tv_usec,
 480                         p->index,
 481                         prt_names(p->type, v4l2_type_names),
 482                         p->bytesused, p->flags,
 483                         p->field, p->sequence,
 484                         prt_names(p->memory, v4l2_memory_names),
 485                         p->m.userptr, p->length);
 486         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
 487                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 488                         tc->hours, tc->minutes, tc->seconds,
 489                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 490 }
 491
 492 static inline void dbgrect(struct video_device *vfd, char *s,
 493                                                         struct v4l2_rect *r)
 494 {
 495         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
 496                                                 r->width, r->height);
 497 };
 498
 499 static inline void v4l_print_pix_fmt(struct video_device *vfd,
 500                                                 struct v4l2_pix_format *fmt)
 501 {
 502         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 503                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 504                 fmt->width, fmt->height,
 505                 (fmt->pixelformat & 0xff),
 506                 (fmt->pixelformat >>  8) & 0xff,
 507                 (fmt->pixelformat >> 16) & 0xff,
 508                 (fmt->pixelformat >> 24) & 0xff,
 509                 prt_names(fmt->field, v4l2_field_names),
 510                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 511 };
 512
 513 static inline void v4l_print_ext_ctrls(unsigned int cmd,
 514         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
 515 {
 516         __u32 i;
 517
 518         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
 519                 return;
 520         dbgarg(cmd, "");
 521         printk(KERN_CONT "class=0x%x", c->ctrl_class);
 522         for (i = 0; i < c->count; i++) {
 523                 if (show_vals && !c->controls[i].size)
 524                         printk(KERN_CONT " id/val=0x%x/0x%x",
 525                                 c->controls[i].id, c->controls[i].value);
 526                 else
 527                         printk(KERN_CONT " id=0x%x,size=%u",
 528                                 c->controls[i].id, c->controls[i].size);
 529         }
 530         printk(KERN_CONT "\n");
 531 };
 532
 533 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 534 {
 535         __u32 i;
 536
 537         /* zero the reserved fields */
 538         c->reserved[0] = c->reserved[1] = 0;
 539         for (i = 0; i < c->count; i++)
 540                 c->controls[i].reserved2[0] = 0;
 541
 542         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 543            when using extended controls.
 544            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 545            is it allowed for backwards compatibility.
 546          */
 547         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 548                 return 0;
 549         /* Check that all controls are from the same control class. */
 550         for (i = 0; i < c->count; i++) {
 551                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 552                         c->error_idx = i;
 553                         return 0;
 554                 }
 555         }
 556         return 1;
 557 }
 558
 559 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 560 {
 561         if (ops == NULL)
 562                 return -EINVAL;
 563
 564         switch (type) {
 565         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 566                 if (ops->vidioc_g_fmt_vid_cap)
 567                         return 0;
 568                 break;
 569         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 570                 if (ops->vidioc_g_fmt_vid_overlay)
 571                         return 0;
 572                 break;
 573         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 574                 if (ops->vidioc_g_fmt_vid_out)
 575                         return 0;
 576                 break;
 577         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 578                 if (ops->vidioc_g_fmt_vid_out_overlay)
 579                         return 0;
 580                 break;
 581         case V4L2_BUF_TYPE_VBI_CAPTURE:
 582                 if (ops->vidioc_g_fmt_vbi_cap)
 583                         return 0;
 584                 break;
 585         case V4L2_BUF_TYPE_VBI_OUTPUT:
 586                 if (ops->vidioc_g_fmt_vbi_out)
 587                         return 0;
 588                 break;
 589         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 590                 if (ops->vidioc_g_fmt_sliced_vbi_cap)
 591                         return 0;
 592                 break;
 593         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 594                 if (ops->vidioc_g_fmt_sliced_vbi_out)
 595                         return 0;
 596                 break;
 597         case V4L2_BUF_TYPE_PRIVATE:
 598                 if (ops->vidioc_g_fmt_type_private)
 599                         return 0;
 600                 break;
 601         }
 602         return -EINVAL;
 603 }
 604
 605 static long __video_do_ioctl(struct file *file,
 606                 unsigned int cmd, void *arg)
 607 {
 608         struct video_device *vfd = video_devdata(file);
 609         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 610         void *fh = file->private_data;
 611         long ret = -EINVAL;
 612
 613         if (ops == NULL) {
 614                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
 615                                 vfd->name);
 616                 return -EINVAL;
 617         }
 618
 619 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 620         /********************************************************
 621          All other V4L1 calls are handled by v4l1_compat module.
 622          Those calls will be translated into V4L2 calls, and
 623          __video_do_ioctl will be called again, with one or more
 624          V4L2 ioctls.
 625          ********************************************************/
 626         if (_IOC_TYPE(cmd) == 'v' && cmd != VIDIOCGMBUF &&
 627                                 _IOC_NR(cmd) < BASE_VIDIOCPRIVATE) {
 628                 return v4l_compat_translate_ioctl(file, cmd, arg,
 629                                                 __video_do_ioctl);
 630         }
 631 #endif
 632
 633         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 634                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 635                 v4l_print_ioctl(vfd->name, cmd);
 636                 printk(KERN_CONT "\n");
 637         }
 638
 639         switch (cmd) {
 640
 641 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 642         /***********************************************************
 643          Handles calls to the obsoleted V4L1 API
 644          Due to the nature of VIDIOCGMBUF, each driver that supports
 645          V4L1 should implement its own handler for this ioctl.
 646          ***********************************************************/
 647
 648         /* --- streaming capture ------------------------------------- */
 649         case VIDIOCGMBUF:
 650         {
 651                 struct video_mbuf *p = arg;
 652
 653                 if (!ops->vidiocgmbuf)
 654                         break;
 655                 ret = ops->vidiocgmbuf(file, fh, p);
 656                 if (!ret)
 657                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 658                                                 p->size, p->frames,
 659                                                 (unsigned long)p->offsets);
 660                 break;
 661         }
 662 #endif
 663
 664         /* --- capabilities ------------------------------------------ */
 665         case VIDIOC_QUERYCAP:
 666         {
 667                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 668
 669                 if (!ops->vidioc_querycap)
 670                         break;
 671
 672                 ret = ops->vidioc_querycap(file, fh, cap);
 673                 if (!ret)
 674                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 675                                         "version=0x%08x, "
 676                                         "capabilities=0x%08x\n",
 677                                         cap->driver, cap->card, cap->bus_info,
 678                                         cap->version,
 679                                         cap->capabilities);
 680                 break;
 681         }
 682
 683         /* --- priority ------------------------------------------ */
 684         case VIDIOC_G_PRIORITY:
 685         {
 686                 enum v4l2_priority *p = arg;
 687
 688                 if (!ops->vidioc_g_priority)
 689                         break;
 690                 ret = ops->vidioc_g_priority(file, fh, p);
 691                 if (!ret)
 692                         dbgarg(cmd, "priority is %d\n", *p);
 693                 break;
 694         }
 695         case VIDIOC_S_PRIORITY:
 696         {
 697                 enum v4l2_priority *p = arg;
 698
 699                 if (!ops->vidioc_s_priority)
 700                         break;
 701                 dbgarg(cmd, "setting priority to %d\n", *p);
 702                 ret = ops->vidioc_s_priority(file, fh, *p);
 703                 break;
 704         }
 705
 706         /* --- capture ioctls ---------------------------------------- */
 707         case VIDIOC_ENUM_FMT:
 708         {
 709                 struct v4l2_fmtdesc *f = arg;
 710
 711                 switch (f->type) {
 712                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 713                         if (ops->vidioc_enum_fmt_vid_cap)
 714                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
 715                         break;
 716                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 717                         if (ops->vidioc_enum_fmt_vid_overlay)
 718                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
 719                                         fh, f);
 720                         break;
 721                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 722                         if (ops->vidioc_enum_fmt_vid_out)
 723                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
 724                         break;
 725                 case V4L2_BUF_TYPE_PRIVATE:
 726                         if (ops->vidioc_enum_fmt_type_private)
 727                                 ret = ops->vidioc_enum_fmt_type_private(file,
 728                                                                 fh, f);
 729                         break;
 730                 default:
 731                         break;
 732                 }
 733                 if (!ret)
 734                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 735                                 "pixelformat=%c%c%c%c, description='%s'\n",
 736                                 f->index, f->type, f->flags,
 737                                 (f->pixelformat & 0xff),
 738                                 (f->pixelformat >>  8) & 0xff,
 739                                 (f->pixelformat >> 16) & 0xff,
 740                                 (f->pixelformat >> 24) & 0xff,
 741                                 f->description);
 742                 break;
 743         }
 744         case VIDIOC_G_FMT:
 745         {
 746                 struct v4l2_format *f = (struct v4l2_format *)arg;
 747
 748                 /* FIXME: Should be one dump per type */
 749                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 750
 751                 switch (f->type) {
 752                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 753                         if (ops->vidioc_g_fmt_vid_cap)
 754                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
 755                         if (!ret)
 756                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 757                         break;
 758                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 759                         if (ops->vidioc_g_fmt_vid_overlay)
 760                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
 761                                                                     fh, f);
 762                         break;
 763                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 764                         if (ops->vidioc_g_fmt_vid_out)
 765                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
 766                         if (!ret)
 767                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 768                         break;
 769                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 770                         if (ops->vidioc_g_fmt_vid_out_overlay)
 771                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
 772                                        fh, f);
 773                         break;
 774                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 775                         if (ops->vidioc_g_fmt_vbi_cap)
 776                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
 777                         break;
 778                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 779                         if (ops->vidioc_g_fmt_vbi_out)
 780                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
 781                         break;
 782                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 783                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
 784                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
 785                                                                         fh, f);
 786                         break;
 787                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 788                         if (ops->vidioc_g_fmt_sliced_vbi_out)
 789                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
 790                                                                         fh, f);
 791                         break;
 792                 case V4L2_BUF_TYPE_PRIVATE:
 793                         if (ops->vidioc_g_fmt_type_private)
 794                                 ret = ops->vidioc_g_fmt_type_private(file,
 795                                                                 fh, f);
 796                         break;
 797                 }
 798
 799                 break;
 800         }
 801         case VIDIOC_S_FMT:
 802         {
 803                 struct v4l2_format *f = (struct v4l2_format *)arg;
 804
 805                 /* FIXME: Should be one dump per type */
 806                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 807
 808                 switch (f->type) {
 809                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 810                         CLEAR_AFTER_FIELD(f, fmt.pix);
 811                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 812                         if (ops->vidioc_s_fmt_vid_cap)
 813                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
 814                         break;
 815                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 816                         CLEAR_AFTER_FIELD(f, fmt.win);
 817                         if (ops->vidioc_s_fmt_vid_overlay)
 818                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
 819                                                                     fh, f);
 820                         break;
 821                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 822                         CLEAR_AFTER_FIELD(f, fmt.pix);
 823                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 824                         if (ops->vidioc_s_fmt_vid_out)
 825                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
 826                         break;
 827                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 828                         CLEAR_AFTER_FIELD(f, fmt.win);
 829                         if (ops->vidioc_s_fmt_vid_out_overlay)
 830                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
 831                                         fh, f);
 832                         break;
 833                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 834                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 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                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 840                         if (ops->vidioc_s_fmt_vbi_out)
 841                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
 842                         break;
 843                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 844                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 845                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
 846                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
 847                                                                         fh, f);
 848                         break;
 849                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 850                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 851                         if (ops->vidioc_s_fmt_sliced_vbi_out)
 852                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
 853                                                                         fh, f);
 854                         break;
 855                 case V4L2_BUF_TYPE_PRIVATE:
 856                         /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
 857                         if (ops->vidioc_s_fmt_type_private)
 858                                 ret = ops->vidioc_s_fmt_type_private(file,
 859                                                                 fh, f);
 860                         break;
 861                 }
 862                 break;
 863         }
 864         case VIDIOC_TRY_FMT:
 865         {
 866                 struct v4l2_format *f = (struct v4l2_format *)arg;
 867
 868                 /* FIXME: Should be one dump per type */
 869                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 870                                                 v4l2_type_names));
 871                 switch (f->type) {
 872                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 873                         CLEAR_AFTER_FIELD(f, fmt.pix);
 874                         if (ops->vidioc_try_fmt_vid_cap)
 875                                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
 876                         if (!ret)
 877                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 878                         break;
 879                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 880                         CLEAR_AFTER_FIELD(f, fmt.win);
 881                         if (ops->vidioc_try_fmt_vid_overlay)
 882                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
 883                                         fh, f);
 884                         break;
 885                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 886                         CLEAR_AFTER_FIELD(f, fmt.pix);
 887                         if (ops->vidioc_try_fmt_vid_out)
 888                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
 889                         if (!ret)
 890                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 891                         break;
 892                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 893                         CLEAR_AFTER_FIELD(f, fmt.win);
 894                         if (ops->vidioc_try_fmt_vid_out_overlay)
 895                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
 896                                        fh, f);
 897                         break;
 898                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 899                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 900                         if (ops->vidioc_try_fmt_vbi_cap)
 901                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
 902                         break;
 903                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 904                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 905                         if (ops->vidioc_try_fmt_vbi_out)
 906                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
 907                         break;
 908                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 909                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 910                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
 911                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
 912                                                                 fh, f);
 913                         break;
 914                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 915                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 916                         if (ops->vidioc_try_fmt_sliced_vbi_out)
 917                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
 918                                                                 fh, f);
 919                         break;
 920                 case V4L2_BUF_TYPE_PRIVATE:
 921                         /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
 922                         if (ops->vidioc_try_fmt_type_private)
 923                                 ret = ops->vidioc_try_fmt_type_private(file,
 924                                                                 fh, f);
 925                         break;
 926                 }
 927
 928                 break;
 929         }
 930         /* FIXME: Those buf reqs could be handled here,
 931            with some changes on videobuf to allow its header to be included at
 932            videodev2.h or being merged at videodev2.
 933          */
 934         case VIDIOC_REQBUFS:
 935         {
 936                 struct v4l2_requestbuffers *p = arg;
 937
 938                 if (!ops->vidioc_reqbufs)
 939                         break;
 940                 ret = check_fmt(ops, p->type);
 941                 if (ret)
 942                         break;
 943
 944                 if (p->type < V4L2_BUF_TYPE_PRIVATE)
 945                         CLEAR_AFTER_FIELD(p, memory);
 946
 947                 ret = ops->vidioc_reqbufs(file, fh, p);
 948                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
 949                                 p->count,
 950                                 prt_names(p->type, v4l2_type_names),
 951                                 prt_names(p->memory, v4l2_memory_names));
 952                 break;
 953         }
 954         case VIDIOC_QUERYBUF:
 955         {
 956                 struct v4l2_buffer *p = arg;
 957
 958                 if (!ops->vidioc_querybuf)
 959                         break;
 960                 ret = check_fmt(ops, p->type);
 961                 if (ret)
 962                         break;
 963
 964                 ret = ops->vidioc_querybuf(file, fh, p);
 965                 if (!ret)
 966                         dbgbuf(cmd, vfd, p);
 967                 break;
 968         }
 969         case VIDIOC_QBUF:
 970         {
 971                 struct v4l2_buffer *p = arg;
 972
 973                 if (!ops->vidioc_qbuf)
 974                         break;
 975                 ret = check_fmt(ops, p->type);
 976                 if (ret)
 977                         break;
 978
 979                 ret = ops->vidioc_qbuf(file, fh, p);
 980                 if (!ret)
 981                         dbgbuf(cmd, vfd, p);
 982                 break;
 983         }
 984         case VIDIOC_DQBUF:
 985         {
 986                 struct v4l2_buffer *p = arg;
 987
 988                 if (!ops->vidioc_dqbuf)
 989                         break;
 990                 ret = check_fmt(ops, p->type);
 991                 if (ret)
 992                         break;
 993
 994                 ret = ops->vidioc_dqbuf(file, fh, p);
 995                 if (!ret)
 996                         dbgbuf(cmd, vfd, p);
 997                 break;
 998         }
 999         case VIDIOC_OVERLAY:
1000         {
1001                 int *i = arg;
1002
1003                 if (!ops->vidioc_overlay)
1004                         break;
1005                 dbgarg(cmd, "value=%d\n", *i);
1006                 ret = ops->vidioc_overlay(file, fh, *i);
1007                 break;
1008         }
1009         case VIDIOC_G_FBUF:
1010         {
1011                 struct v4l2_framebuffer *p = arg;
1012
1013                 if (!ops->vidioc_g_fbuf)
1014                         break;
1015                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1016                 if (!ret) {
1017                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1018                                         p->capability, p->flags,
1019                                         (unsigned long)p->base);
1020                         v4l_print_pix_fmt(vfd, &p->fmt);
1021                 }
1022                 break;
1023         }
1024         case VIDIOC_S_FBUF:
1025         {
1026                 struct v4l2_framebuffer *p = arg;
1027
1028                 if (!ops->vidioc_s_fbuf)
1029                         break;
1030                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1031                         p->capability, p->flags, (unsigned long)p->base);
1032                 v4l_print_pix_fmt(vfd, &p->fmt);
1033                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1034                 break;
1035         }
1036         case VIDIOC_STREAMON:
1037         {
1038                 enum v4l2_buf_type i = *(int *)arg;
1039
1040                 if (!ops->vidioc_streamon)
1041                         break;
1042                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1043                 ret = ops->vidioc_streamon(file, fh, i);
1044                 break;
1045         }
1046         case VIDIOC_STREAMOFF:
1047         {
1048                 enum v4l2_buf_type i = *(int *)arg;
1049
1050                 if (!ops->vidioc_streamoff)
1051                         break;
1052                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1053                 ret = ops->vidioc_streamoff(file, fh, i);
1054                 break;
1055         }
1056         /* ---------- tv norms ---------- */
1057         case VIDIOC_ENUMSTD:
1058         {
1059                 struct v4l2_standard *p = arg;
1060                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1061                 unsigned int index = p->index, i, j = 0;
1062                 const char *descr = "";
1063
1064                 /* Return norm array in a canonical way */
1065                 for (i = 0; i <= index && id; i++) {
1066                         /* last std value in the standards array is 0, so this
1067                            while always ends there since (id & 0) == 0. */
1068                         while ((id & standards[j].std) != standards[j].std)
1069                                 j++;
1070                         curr_id = standards[j].std;
1071                         descr = standards[j].descr;
1072                         j++;
1073                         if (curr_id == 0)
1074                                 break;
1075                         if (curr_id != V4L2_STD_PAL &&
1076                             curr_id != V4L2_STD_SECAM &&
1077                             curr_id != V4L2_STD_NTSC)
1078                                 id &= ~curr_id;
1079                 }
1080                 if (i <= index)
1081                         break;
1082
1083                 v4l2_video_std_construct(p, curr_id, descr);
1084
1085                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1086                                 "framelines=%d\n", p->index,
1087                                 (unsigned long long)p->id, p->name,
1088                                 p->frameperiod.numerator,
1089                                 p->frameperiod.denominator,
1090                                 p->framelines);
1091
1092                 ret = 0;
1093                 break;
1094         }
1095         case VIDIOC_G_STD:
1096         {
1097                 v4l2_std_id *id = arg;
1098
1099                 ret = 0;
1100                 /* Calls the specific handler */
1101                 if (ops->vidioc_g_std)
1102                         ret = ops->vidioc_g_std(file, fh, id);
1103                 else if (vfd->current_norm)
1104                         *id = vfd->current_norm;
1105                 else
1106                         ret = -EINVAL;
1107
1108                 if (!ret)
1109                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1110                 break;
1111         }
1112         case VIDIOC_S_STD:
1113         {
1114                 v4l2_std_id *id = arg, norm;
1115
1116                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1117
1118                 norm = (*id) & vfd->tvnorms;
1119                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1120                         break;
1121
1122                 /* Calls the specific handler */
1123                 if (ops->vidioc_s_std)
1124                         ret = ops->vidioc_s_std(file, fh, &norm);
1125                 else
1126                         ret = -EINVAL;
1127
1128                 /* Updates standard information */
1129                 if (ret >= 0)
1130                         vfd->current_norm = norm;
1131                 break;
1132         }
1133         case VIDIOC_QUERYSTD:
1134         {
1135                 v4l2_std_id *p = arg;
1136
1137                 if (!ops->vidioc_querystd)
1138                         break;
1139                 ret = ops->vidioc_querystd(file, fh, arg);
1140                 if (!ret)
1141                         dbgarg(cmd, "detected std=%08Lx\n",
1142                                                 (unsigned long long)*p);
1143                 break;
1144         }
1145         /* ------ input switching ---------- */
1146         /* FIXME: Inputs can be handled inside videodev2 */
1147         case VIDIOC_ENUMINPUT:
1148         {
1149                 struct v4l2_input *p = arg;
1150
1151                 /*
1152                  * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1153                  * CAP_STD here based on ioctl handler provided by the
1154                  * driver. If the driver doesn't support these
1155                  * for a specific input, it must override these flags.
1156                  */
1157                 if (ops->vidioc_s_std)
1158                         p->capabilities |= V4L2_IN_CAP_STD;
1159                 if (ops->vidioc_s_dv_preset)
1160                         p->capabilities |= V4L2_IN_CAP_PRESETS;
1161                 if (ops->vidioc_s_dv_timings)
1162                         p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1163
1164                 if (!ops->vidioc_enum_input)
1165                         break;
1166
1167                 ret = ops->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 (!ops->vidioc_g_input)
1183                         break;
1184                 ret = ops->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 (!ops->vidioc_s_input)
1194                         break;
1195                 dbgarg(cmd, "value=%d\n", *i);
1196                 ret = ops->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
1205                 if (!ops->vidioc_enum_output)
1206                         break;
1207
1208                 /*
1209                  * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1210                  * CAP_STD here based on ioctl handler provided by the
1211                  * driver. If the driver doesn't support these
1212                  * for a specific output, it must override these flags.
1213                  */
1214                 if (ops->vidioc_s_std)
1215                         p->capabilities |= V4L2_OUT_CAP_STD;
1216                 if (ops->vidioc_s_dv_preset)
1217                         p->capabilities |= V4L2_OUT_CAP_PRESETS;
1218                 if (ops->vidioc_s_dv_timings)
1219                         p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1220
1221                 ret = ops->vidioc_enum_output(file, fh, p);
1222                 if (!ret)
1223                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1224                                 "audioset=0x%x, "
1225                                 "modulator=%d, std=0x%08Lx\n",
1226                                 p->index, p->name, p->type, p->audioset,
1227                                 p->modulator, (unsigned long long)p->std);
1228                 break;
1229         }
1230         case VIDIOC_G_OUTPUT:
1231         {
1232                 unsigned int *i = arg;
1233
1234                 if (!ops->vidioc_g_output)
1235                         break;
1236                 ret = ops->vidioc_g_output(file, fh, i);
1237                 if (!ret)
1238                         dbgarg(cmd, "value=%d\n", *i);
1239                 break;
1240         }
1241         case VIDIOC_S_OUTPUT:
1242         {
1243                 unsigned int *i = arg;
1244
1245                 if (!ops->vidioc_s_output)
1246                         break;
1247                 dbgarg(cmd, "value=%d\n", *i);
1248                 ret = ops->vidioc_s_output(file, fh, *i);
1249                 break;
1250         }
1251
1252         /* --- controls ---------------------------------------------- */
1253         case VIDIOC_QUERYCTRL:
1254         {
1255                 struct v4l2_queryctrl *p = arg;
1256
1257                 if (!ops->vidioc_queryctrl)
1258                         break;
1259                 ret = ops->vidioc_queryctrl(file, fh, p);
1260                 if (!ret)
1261                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1262                                         "step=%d, default=%d, flags=0x%08x\n",
1263                                         p->id, p->type, p->name,
1264                                         p->minimum, p->maximum,
1265                                         p->step, p->default_value, p->flags);
1266                 else
1267                         dbgarg(cmd, "id=0x%x\n", p->id);
1268                 break;
1269         }
1270         case VIDIOC_G_CTRL:
1271         {
1272                 struct v4l2_control *p = arg;
1273
1274                 if (ops->vidioc_g_ctrl)
1275                         ret = ops->vidioc_g_ctrl(file, fh, p);
1276                 else if (ops->vidioc_g_ext_ctrls) {
1277                         struct v4l2_ext_controls ctrls;
1278                         struct v4l2_ext_control ctrl;
1279
1280                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1281                         ctrls.count = 1;
1282                         ctrls.controls = &ctrl;
1283                         ctrl.id = p->id;
1284                         ctrl.value = p->value;
1285                         if (check_ext_ctrls(&ctrls, 1)) {
1286                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1287                                 if (ret == 0)
1288                                         p->value = ctrl.value;
1289                         }
1290                 } else
1291                         break;
1292                 if (!ret)
1293                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1294                 else
1295                         dbgarg(cmd, "id=0x%x\n", p->id);
1296                 break;
1297         }
1298         case VIDIOC_S_CTRL:
1299         {
1300                 struct v4l2_control *p = arg;
1301                 struct v4l2_ext_controls ctrls;
1302                 struct v4l2_ext_control ctrl;
1303
1304                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1305                         break;
1306
1307                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1308
1309                 if (ops->vidioc_s_ctrl) {
1310                         ret = ops->vidioc_s_ctrl(file, fh, p);
1311                         break;
1312                 }
1313                 if (!ops->vidioc_s_ext_ctrls)
1314                         break;
1315
1316                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1317                 ctrls.count = 1;
1318                 ctrls.controls = &ctrl;
1319                 ctrl.id = p->id;
1320                 ctrl.value = p->value;
1321                 if (check_ext_ctrls(&ctrls, 1))
1322                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1323                 break;
1324         }
1325         case VIDIOC_G_EXT_CTRLS:
1326         {
1327                 struct v4l2_ext_controls *p = arg;
1328
1329                 p->error_idx = p->count;
1330                 if (!ops->vidioc_g_ext_ctrls)
1331                         break;
1332                 if (check_ext_ctrls(p, 0))
1333                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1334                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1335                 break;
1336         }
1337         case VIDIOC_S_EXT_CTRLS:
1338         {
1339                 struct v4l2_ext_controls *p = arg;
1340
1341                 p->error_idx = p->count;
1342                 if (!ops->vidioc_s_ext_ctrls)
1343                         break;
1344                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1345                 if (check_ext_ctrls(p, 0))
1346                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1347                 break;
1348         }
1349         case VIDIOC_TRY_EXT_CTRLS:
1350         {
1351                 struct v4l2_ext_controls *p = arg;
1352
1353                 p->error_idx = p->count;
1354                 if (!ops->vidioc_try_ext_ctrls)
1355                         break;
1356                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1357                 if (check_ext_ctrls(p, 0))
1358                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1359                 break;
1360         }
1361         case VIDIOC_QUERYMENU:
1362         {
1363                 struct v4l2_querymenu *p = arg;
1364
1365                 if (!ops->vidioc_querymenu)
1366                         break;
1367                 ret = ops->vidioc_querymenu(file, fh, p);
1368                 if (!ret)
1369                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1370                                 p->id, p->index, p->name);
1371                 else
1372                         dbgarg(cmd, "id=0x%x, index=%d\n",
1373                                 p->id, p->index);
1374                 break;
1375         }
1376         /* --- audio ---------------------------------------------- */
1377         case VIDIOC_ENUMAUDIO:
1378         {
1379                 struct v4l2_audio *p = arg;
1380
1381                 if (!ops->vidioc_enumaudio)
1382                         break;
1383                 ret = ops->vidioc_enumaudio(file, fh, p);
1384                 if (!ret)
1385                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1386                                         "mode=0x%x\n", p->index, p->name,
1387                                         p->capability, p->mode);
1388                 else
1389                         dbgarg(cmd, "index=%d\n", p->index);
1390                 break;
1391         }
1392         case VIDIOC_G_AUDIO:
1393         {
1394                 struct v4l2_audio *p = arg;
1395
1396                 if (!ops->vidioc_g_audio)
1397                         break;
1398
1399                 ret = ops->vidioc_g_audio(file, fh, p);
1400                 if (!ret)
1401                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1402                                         "mode=0x%x\n", p->index,
1403                                         p->name, p->capability, p->mode);
1404                 else
1405                         dbgarg(cmd, "index=%d\n", p->index);
1406                 break;
1407         }
1408         case VIDIOC_S_AUDIO:
1409         {
1410                 struct v4l2_audio *p = arg;
1411
1412                 if (!ops->vidioc_s_audio)
1413                         break;
1414                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1415                                         "mode=0x%x\n", p->index, p->name,
1416                                         p->capability, p->mode);
1417                 ret = ops->vidioc_s_audio(file, fh, p);
1418                 break;
1419         }
1420         case VIDIOC_ENUMAUDOUT:
1421         {
1422                 struct v4l2_audioout *p = arg;
1423
1424                 if (!ops->vidioc_enumaudout)
1425                         break;
1426                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1427                 ret = ops->vidioc_enumaudout(file, fh, p);
1428                 if (!ret)
1429                         dbgarg2("index=%d, name=%s, capability=%d, "
1430                                         "mode=%d\n", p->index, p->name,
1431                                         p->capability, p->mode);
1432                 break;
1433         }
1434         case VIDIOC_G_AUDOUT:
1435         {
1436                 struct v4l2_audioout *p = arg;
1437
1438                 if (!ops->vidioc_g_audout)
1439                         break;
1440
1441                 ret = ops->vidioc_g_audout(file, fh, p);
1442                 if (!ret)
1443                         dbgarg2("index=%d, name=%s, capability=%d, "
1444                                         "mode=%d\n", p->index, p->name,
1445                                         p->capability, p->mode);
1446                 break;
1447         }
1448         case VIDIOC_S_AUDOUT:
1449         {
1450                 struct v4l2_audioout *p = arg;
1451
1452                 if (!ops->vidioc_s_audout)
1453                         break;
1454                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1455                                         "mode=%d\n", p->index, p->name,
1456                                         p->capability, p->mode);
1457
1458                 ret = ops->vidioc_s_audout(file, fh, p);
1459                 break;
1460         }
1461         case VIDIOC_G_MODULATOR:
1462         {
1463                 struct v4l2_modulator *p = arg;
1464
1465                 if (!ops->vidioc_g_modulator)
1466                         break;
1467                 ret = ops->vidioc_g_modulator(file, fh, p);
1468                 if (!ret)
1469                         dbgarg(cmd, "index=%d, name=%s, "
1470                                         "capability=%d, rangelow=%d,"
1471                                         " rangehigh=%d, txsubchans=%d\n",
1472                                         p->index, p->name, p->capability,
1473                                         p->rangelow, p->rangehigh,
1474                                         p->txsubchans);
1475                 break;
1476         }
1477         case VIDIOC_S_MODULATOR:
1478         {
1479                 struct v4l2_modulator *p = arg;
1480
1481                 if (!ops->vidioc_s_modulator)
1482                         break;
1483                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1484                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1485                                 p->index, p->name, p->capability, p->rangelow,
1486                                 p->rangehigh, p->txsubchans);
1487                         ret = ops->vidioc_s_modulator(file, fh, p);
1488                 break;
1489         }
1490         case VIDIOC_G_CROP:
1491         {
1492                 struct v4l2_crop *p = arg;
1493
1494                 if (!ops->vidioc_g_crop)
1495                         break;
1496
1497                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1498                 ret = ops->vidioc_g_crop(file, fh, p);
1499                 if (!ret)
1500                         dbgrect(vfd, "", &p->c);
1501                 break;
1502         }
1503         case VIDIOC_S_CROP:
1504         {
1505                 struct v4l2_crop *p = arg;
1506
1507                 if (!ops->vidioc_s_crop)
1508                         break;
1509                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1510                 dbgrect(vfd, "", &p->c);
1511                 ret = ops->vidioc_s_crop(file, fh, p);
1512                 break;
1513         }
1514         case VIDIOC_CROPCAP:
1515         {
1516                 struct v4l2_cropcap *p = arg;
1517
1518                 /*FIXME: Should also show v4l2_fract pixelaspect */
1519                 if (!ops->vidioc_cropcap)
1520                         break;
1521
1522                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1523                 ret = ops->vidioc_cropcap(file, fh, p);
1524                 if (!ret) {
1525                         dbgrect(vfd, "bounds ", &p->bounds);
1526                         dbgrect(vfd, "defrect ", &p->defrect);
1527                 }
1528                 break;
1529         }
1530         case VIDIOC_G_JPEGCOMP:
1531         {
1532                 struct v4l2_jpegcompression *p = arg;
1533
1534                 if (!ops->vidioc_g_jpegcomp)
1535                         break;
1536
1537                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1538                 if (!ret)
1539                         dbgarg(cmd, "quality=%d, APPn=%d, "
1540                                         "APP_len=%d, COM_len=%d, "
1541                                         "jpeg_markers=%d\n",
1542                                         p->quality, p->APPn, p->APP_len,
1543                                         p->COM_len, p->jpeg_markers);
1544                 break;
1545         }
1546         case VIDIOC_S_JPEGCOMP:
1547         {
1548                 struct v4l2_jpegcompression *p = arg;
1549
1550                 if (!ops->vidioc_g_jpegcomp)
1551                         break;
1552                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1553                                         "COM_len=%d, jpeg_markers=%d\n",
1554                                         p->quality, p->APPn, p->APP_len,
1555                                         p->COM_len, p->jpeg_markers);
1556                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1557                 break;
1558         }
1559         case VIDIOC_G_ENC_INDEX:
1560         {
1561                 struct v4l2_enc_idx *p = arg;
1562
1563                 if (!ops->vidioc_g_enc_index)
1564                         break;
1565                 ret = ops->vidioc_g_enc_index(file, fh, p);
1566                 if (!ret)
1567                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1568                                         p->entries, p->entries_cap);
1569                 break;
1570         }
1571         case VIDIOC_ENCODER_CMD:
1572         {
1573                 struct v4l2_encoder_cmd *p = arg;
1574
1575                 if (!ops->vidioc_encoder_cmd)
1576                         break;
1577                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1578                 if (!ret)
1579                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1580                 break;
1581         }
1582         case VIDIOC_TRY_ENCODER_CMD:
1583         {
1584                 struct v4l2_encoder_cmd *p = arg;
1585
1586                 if (!ops->vidioc_try_encoder_cmd)
1587                         break;
1588                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1589                 if (!ret)
1590                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1591                 break;
1592         }
1593         case VIDIOC_G_PARM:
1594         {
1595                 struct v4l2_streamparm *p = arg;
1596
1597                 if (ops->vidioc_g_parm) {
1598                         ret = check_fmt(ops, p->type);
1599                         if (ret)
1600                                 break;
1601                         ret = ops->vidioc_g_parm(file, fh, p);
1602                 } else {
1603                         v4l2_std_id std = vfd->current_norm;
1604
1605                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1606                                 break;
1607
1608                         ret = 0;
1609                         if (ops->vidioc_g_std)
1610                                 ret = ops->vidioc_g_std(file, fh, &std);
1611                         else if (std == 0)
1612                                 ret = -EINVAL;
1613                         if (ret == 0)
1614                                 v4l2_video_std_frame_period(std,
1615                                                     &p->parm.capture.timeperframe);
1616                 }
1617
1618                 dbgarg(cmd, "type=%d\n", p->type);
1619                 break;
1620         }
1621         case VIDIOC_S_PARM:
1622         {
1623                 struct v4l2_streamparm *p = arg;
1624
1625                 if (!ops->vidioc_s_parm)
1626                         break;
1627                 ret = check_fmt(ops, p->type);
1628                 if (ret)
1629                         break;
1630
1631                 dbgarg(cmd, "type=%d\n", p->type);
1632                 ret = ops->vidioc_s_parm(file, fh, p);
1633                 break;
1634         }
1635         case VIDIOC_G_TUNER:
1636         {
1637                 struct v4l2_tuner *p = arg;
1638
1639                 if (!ops->vidioc_g_tuner)
1640                         break;
1641
1642                 ret = ops->vidioc_g_tuner(file, fh, p);
1643                 if (!ret)
1644                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1645                                         "capability=0x%x, rangelow=%d, "
1646                                         "rangehigh=%d, signal=%d, afc=%d, "
1647                                         "rxsubchans=0x%x, audmode=%d\n",
1648                                         p->index, p->name, p->type,
1649                                         p->capability, p->rangelow,
1650                                         p->rangehigh, p->signal, p->afc,
1651                                         p->rxsubchans, p->audmode);
1652                 break;
1653         }
1654         case VIDIOC_S_TUNER:
1655         {
1656                 struct v4l2_tuner *p = arg;
1657
1658                 if (!ops->vidioc_s_tuner)
1659                         break;
1660                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1661                                 "capability=0x%x, rangelow=%d, "
1662                                 "rangehigh=%d, signal=%d, afc=%d, "
1663                                 "rxsubchans=0x%x, audmode=%d\n",
1664                                 p->index, p->name, p->type,
1665                                 p->capability, p->rangelow,
1666                                 p->rangehigh, p->signal, p->afc,
1667                                 p->rxsubchans, p->audmode);
1668                 ret = ops->vidioc_s_tuner(file, fh, p);
1669                 break;
1670         }
1671         case VIDIOC_G_FREQUENCY:
1672         {
1673                 struct v4l2_frequency *p = arg;
1674
1675                 if (!ops->vidioc_g_frequency)
1676                         break;
1677
1678                 ret = ops->vidioc_g_frequency(file, fh, p);
1679                 if (!ret)
1680                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1681                                         p->tuner, p->type, p->frequency);
1682                 break;
1683         }
1684         case VIDIOC_S_FREQUENCY:
1685         {
1686                 struct v4l2_frequency *p = arg;
1687
1688                 if (!ops->vidioc_s_frequency)
1689                         break;
1690                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1691                                 p->tuner, p->type, p->frequency);
1692                 ret = ops->vidioc_s_frequency(file, fh, p);
1693                 break;
1694         }
1695         case VIDIOC_G_SLICED_VBI_CAP:
1696         {
1697                 struct v4l2_sliced_vbi_cap *p = arg;
1698
1699                 if (!ops->vidioc_g_sliced_vbi_cap)
1700                         break;
1701
1702                 /* Clear up to type, everything after type is zerod already */
1703                 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1704
1705                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1706                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1707                 if (!ret)
1708                         dbgarg2("service_set=%d\n", p->service_set);
1709                 break;
1710         }
1711         case VIDIOC_LOG_STATUS:
1712         {
1713                 if (!ops->vidioc_log_status)
1714                         break;
1715                 ret = ops->vidioc_log_status(file, fh);
1716                 break;
1717         }
1718 #ifdef CONFIG_VIDEO_ADV_DEBUG
1719         case VIDIOC_DBG_G_REGISTER:
1720         {
1721                 struct v4l2_dbg_register *p = arg;
1722
1723                 if (!capable(CAP_SYS_ADMIN))
1724                         ret = -EPERM;
1725                 else if (ops->vidioc_g_register)
1726                         ret = ops->vidioc_g_register(file, fh, p);
1727                 break;
1728         }
1729         case VIDIOC_DBG_S_REGISTER:
1730         {
1731                 struct v4l2_dbg_register *p = arg;
1732
1733                 if (!capable(CAP_SYS_ADMIN))
1734                         ret = -EPERM;
1735                 else if (ops->vidioc_s_register)
1736                         ret = ops->vidioc_s_register(file, fh, p);
1737                 break;
1738         }
1739 #endif
1740         case VIDIOC_DBG_G_CHIP_IDENT:
1741         {
1742                 struct v4l2_dbg_chip_ident *p = arg;
1743
1744                 if (!ops->vidioc_g_chip_ident)
1745                         break;
1746                 p->ident = V4L2_IDENT_NONE;
1747                 p->revision = 0;
1748                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1749                 if (!ret)
1750                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1751                 break;
1752         }
1753         case VIDIOC_S_HW_FREQ_SEEK:
1754         {
1755                 struct v4l2_hw_freq_seek *p = arg;
1756
1757                 if (!ops->vidioc_s_hw_freq_seek)
1758                         break;
1759                 dbgarg(cmd,
1760                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1761                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1762                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1763                 break;
1764         }
1765         case VIDIOC_ENUM_FRAMESIZES:
1766         {
1767                 struct v4l2_frmsizeenum *p = arg;
1768
1769                 if (!ops->vidioc_enum_framesizes)
1770                         break;
1771
1772                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1773                 dbgarg(cmd,
1774                         "index=%d, pixelformat=%c%c%c%c, type=%d ",
1775                         p->index,
1776                         (p->pixel_format & 0xff),
1777                         (p->pixel_format >>  8) & 0xff,
1778                         (p->pixel_format >> 16) & 0xff,
1779                         (p->pixel_format >> 24) & 0xff,
1780                         p->type);
1781                 switch (p->type) {
1782                 case V4L2_FRMSIZE_TYPE_DISCRETE:
1783                         dbgarg3("width = %d, height=%d\n",
1784                                 p->discrete.width, p->discrete.height);
1785                         break;
1786                 case V4L2_FRMSIZE_TYPE_STEPWISE:
1787                         dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
1788                                 p->stepwise.min_width,  p->stepwise.min_height,
1789                                 p->stepwise.step_width, p->stepwise.step_height,
1790                                 p->stepwise.max_width,  p->stepwise.max_height);
1791                         break;
1792                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1793                         dbgarg3("continuous\n");
1794                         break;
1795                 default:
1796                         dbgarg3("- Unknown type!\n");
1797                 }
1798
1799                 break;
1800         }
1801         case VIDIOC_ENUM_FRAMEINTERVALS:
1802         {
1803                 struct v4l2_frmivalenum *p = arg;
1804
1805                 if (!ops->vidioc_enum_frameintervals)
1806                         break;
1807
1808                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1809                 dbgarg(cmd,
1810                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1811                         p->index, p->pixel_format,
1812                         p->width, p->height, p->type);
1813                 switch (p->type) {
1814                 case V4L2_FRMIVAL_TYPE_DISCRETE:
1815                         dbgarg2("fps=%d/%d\n",
1816                                 p->discrete.numerator,
1817                                 p->discrete.denominator);
1818                         break;
1819                 case V4L2_FRMIVAL_TYPE_STEPWISE:
1820                         dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1821                                 p->stepwise.min.numerator,
1822                                 p->stepwise.min.denominator,
1823                                 p->stepwise.max.numerator,
1824                                 p->stepwise.max.denominator,
1825                                 p->stepwise.step.numerator,
1826                                 p->stepwise.step.denominator);
1827                         break;
1828                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1829                         dbgarg2("continuous\n");
1830                         break;
1831                 default:
1832                         dbgarg2("- Unknown type!\n");
1833                 }
1834                 break;
1835         }
1836         case VIDIOC_ENUM_DV_PRESETS:
1837         {
1838                 struct v4l2_dv_enum_preset *p = arg;
1839
1840                 if (!ops->vidioc_enum_dv_presets)
1841                         break;
1842
1843                 ret = ops->vidioc_enum_dv_presets(file, fh, p);
1844                 if (!ret)
1845                         dbgarg(cmd,
1846                                 "index=%d, preset=%d, name=%s, width=%d,"
1847                                 " height=%d ",
1848                                 p->index, p->preset, p->name, p->width,
1849                                 p->height);
1850                 break;
1851         }
1852         case VIDIOC_S_DV_PRESET:
1853         {
1854                 struct v4l2_dv_preset *p = arg;
1855
1856                 if (!ops->vidioc_s_dv_preset)
1857                         break;
1858
1859                 dbgarg(cmd, "preset=%d\n", p->preset);
1860                 ret = ops->vidioc_s_dv_preset(file, fh, p);
1861                 break;
1862         }
1863         case VIDIOC_G_DV_PRESET:
1864         {
1865                 struct v4l2_dv_preset *p = arg;
1866
1867                 if (!ops->vidioc_g_dv_preset)
1868                         break;
1869
1870                 ret = ops->vidioc_g_dv_preset(file, fh, p);
1871                 if (!ret)
1872                         dbgarg(cmd, "preset=%d\n", p->preset);
1873                 break;
1874         }
1875         case VIDIOC_QUERY_DV_PRESET:
1876         {
1877                 struct v4l2_dv_preset *p = arg;
1878
1879                 if (!ops->vidioc_query_dv_preset)
1880                         break;
1881
1882                 ret = ops->vidioc_query_dv_preset(file, fh, p);
1883                 if (!ret)
1884                         dbgarg(cmd, "preset=%d\n", p->preset);
1885                 break;
1886         }
1887         case VIDIOC_S_DV_TIMINGS:
1888         {
1889                 struct v4l2_dv_timings *p = arg;
1890
1891                 if (!ops->vidioc_s_dv_timings)
1892                         break;
1893
1894                 switch (p->type) {
1895                 case V4L2_DV_BT_656_1120:
1896                         dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
1897                                 " width=%d, height=%d, polarities=%x,"
1898                                 " hfrontporch=%d, hsync=%d, hbackporch=%d,"
1899                                 " vfrontporch=%d, vsync=%d, vbackporch=%d,"
1900                                 " il_vfrontporch=%d, il_vsync=%d,"
1901                                 " il_vbackporch=%d\n",
1902                                 p->bt.interlaced, p->bt.pixelclock,
1903                                 p->bt.width, p->bt.height, p->bt.polarities,
1904                                 p->bt.hfrontporch, p->bt.hsync,
1905                                 p->bt.hbackporch, p->bt.vfrontporch,
1906                                 p->bt.vsync, p->bt.vbackporch,
1907                                 p->bt.il_vfrontporch, p->bt.il_vsync,
1908                                 p->bt.il_vbackporch);
1909                         ret = ops->vidioc_s_dv_timings(file, fh, p);
1910                         break;
1911                 default:
1912                         dbgarg2("Unknown type %d!\n", p->type);
1913                         break;
1914                 }
1915                 break;
1916         }
1917         case VIDIOC_G_DV_TIMINGS:
1918         {
1919                 struct v4l2_dv_timings *p = arg;
1920
1921                 if (!ops->vidioc_g_dv_timings)
1922                         break;
1923
1924                 ret = ops->vidioc_g_dv_timings(file, fh, p);
1925                 if (!ret) {
1926                         switch (p->type) {
1927                         case V4L2_DV_BT_656_1120:
1928                                 dbgarg2("bt-656/1120:interlaced=%d,"
1929                                         " pixelclock=%lld,"
1930                                         " width=%d, height=%d, polarities=%x,"
1931                                         " hfrontporch=%d, hsync=%d,"
1932                                         " hbackporch=%d, vfrontporch=%d,"
1933                                         " vsync=%d, vbackporch=%d,"
1934                                         " il_vfrontporch=%d, il_vsync=%d,"
1935                                         " il_vbackporch=%d\n",
1936                                         p->bt.interlaced, p->bt.pixelclock,
1937                                         p->bt.width, p->bt.height,
1938                                         p->bt.polarities, p->bt.hfrontporch,
1939                                         p->bt.hsync, p->bt.hbackporch,
1940                                         p->bt.vfrontporch, p->bt.vsync,
1941                                         p->bt.vbackporch, p->bt.il_vfrontporch,
1942                                         p->bt.il_vsync, p->bt.il_vbackporch);
1943                                 break;
1944                         default:
1945                                 dbgarg2("Unknown type %d!\n", p->type);
1946                                 break;
1947                         }
1948                 }
1949                 break;
1950         }
1951
1952         default:
1953         {
1954                 if (!ops->vidioc_default)
1955                         break;
1956                 ret = ops->vidioc_default(file, fh, cmd, arg);
1957                 break;
1958         }
1959         } /* switch */
1960
1961         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1962                 if (ret < 0) {
1963                         v4l_print_ioctl(vfd->name, cmd);
1964                         printk(KERN_CONT " error %ld\n", ret);
1965                 }
1966         }
1967
1968         return ret;
1969 }
1970
1971 /* In some cases, only a few fields are used as input, i.e. when the app sets
1972  * "index" and then the driver fills in the rest of the structure for the thing
1973  * with that index.  We only need to copy up the first non-input field.  */
1974 static unsigned long cmd_input_size(unsigned int cmd)
1975 {
1976         /* Size of structure up to and including 'field' */
1977 #define CMDINSIZE(cmd, type, field)                             \
1978         case VIDIOC_##cmd:                                      \
1979                 return offsetof(struct v4l2_##type, field) +    \
1980                         sizeof(((struct v4l2_##type *)0)->field);
1981
1982         switch (cmd) {
1983                 CMDINSIZE(ENUM_FMT,             fmtdesc,        type);
1984                 CMDINSIZE(G_FMT,                format,         type);
1985                 CMDINSIZE(QUERYBUF,             buffer,         type);
1986                 CMDINSIZE(G_PARM,               streamparm,     type);
1987                 CMDINSIZE(ENUMSTD,              standard,       index);
1988                 CMDINSIZE(ENUMINPUT,            input,          index);
1989                 CMDINSIZE(G_CTRL,               control,        id);
1990                 CMDINSIZE(G_TUNER,              tuner,          index);
1991                 CMDINSIZE(QUERYCTRL,            queryctrl,      id);
1992                 CMDINSIZE(QUERYMENU,            querymenu,      index);
1993                 CMDINSIZE(ENUMOUTPUT,           output,         index);
1994                 CMDINSIZE(G_MODULATOR,          modulator,      index);
1995                 CMDINSIZE(G_FREQUENCY,          frequency,      tuner);
1996                 CMDINSIZE(CROPCAP,              cropcap,        type);
1997                 CMDINSIZE(G_CROP,               crop,           type);
1998                 CMDINSIZE(ENUMAUDIO,            audio,          index);
1999                 CMDINSIZE(ENUMAUDOUT,           audioout,       index);
2000                 CMDINSIZE(ENCODER_CMD,          encoder_cmd,    flags);
2001                 CMDINSIZE(TRY_ENCODER_CMD,      encoder_cmd,    flags);
2002                 CMDINSIZE(G_SLICED_VBI_CAP,     sliced_vbi_cap, type);
2003                 CMDINSIZE(ENUM_FRAMESIZES,      frmsizeenum,    pixel_format);
2004                 CMDINSIZE(ENUM_FRAMEINTERVALS,  frmivalenum,    height);
2005         default:
2006                 return _IOC_SIZE(cmd);
2007         }
2008 }
2009
2010 long video_ioctl2(struct file *file,
2011                unsigned int cmd, unsigned long arg)
2012 {
2013         char    sbuf[128];
2014         void    *mbuf = NULL;
2015         void    *parg = (void *)arg;
2016         long    err  = -EINVAL;
2017         int     is_ext_ctrl;
2018         size_t  ctrls_size = 0;
2019         void __user *user_ptr = NULL;
2020
2021 #ifdef __OLD_VIDIOC_
2022         cmd = video_fix_command(cmd);
2023 #endif
2024         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
2025                        cmd == VIDIOC_TRY_EXT_CTRLS);
2026
2027         /*  Copy arguments into temp kernel buffer  */
2028         if (_IOC_DIR(cmd) != _IOC_NONE) {
2029                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2030                         parg = sbuf;
2031                 } else {
2032                         /* too big to allocate from stack */
2033                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2034                         if (NULL == mbuf)
2035                                 return -ENOMEM;
2036                         parg = mbuf;
2037                 }
2038
2039                 err = -EFAULT;
2040                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2041                         unsigned long n = cmd_input_size(cmd);
2042
2043                         if (copy_from_user(parg, (void __user *)arg, n))
2044                                 goto out;
2045
2046                         /* zero out anything we don't copy from userspace */
2047                         if (n < _IOC_SIZE(cmd))
2048                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2049                 } else {
2050                         /* read-only ioctl */
2051                         memset(parg, 0, _IOC_SIZE(cmd));
2052                 }
2053         }
2054
2055         if (is_ext_ctrl) {
2056                 struct v4l2_ext_controls *p = parg;
2057
2058                 /* In case of an error, tell the caller that it wasn't
2059                    a specific control that caused it. */
2060                 p->error_idx = p->count;
2061                 user_ptr = (void __user *)p->controls;
2062                 if (p->count) {
2063                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
2064                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
2065                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
2066                         err = -ENOMEM;
2067                         if (NULL == mbuf)
2068                                 goto out_ext_ctrl;
2069                         err = -EFAULT;
2070                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
2071                                 goto out_ext_ctrl;
2072                         p->controls = mbuf;
2073                 }
2074         }
2075
2076         /* Handles IOCTL */
2077         err = __video_do_ioctl(file, cmd, parg);
2078         if (err == -ENOIOCTLCMD)
2079                 err = -EINVAL;
2080         if (is_ext_ctrl) {
2081                 struct v4l2_ext_controls *p = parg;
2082
2083                 p->controls = (void *)user_ptr;
2084                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
2085                         err = -EFAULT;
2086                 goto out_ext_ctrl;
2087         }
2088         if (err < 0)
2089                 goto out;
2090
2091 out_ext_ctrl:
2092         /*  Copy results into user buffer  */
2093         switch (_IOC_DIR(cmd)) {
2094         case _IOC_READ:
2095         case (_IOC_WRITE | _IOC_READ):
2096                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2097                         err = -EFAULT;
2098                 break;
2099         }
2100
2101 out:
2102         kfree(mbuf);
2103         return err;
2104 }
2105 EXPORT_SYMBOL(video_ioctl2);