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 ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 614                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 615                 v4l_print_ioctl(vfd->name, cmd);
 616                 printk(KERN_CONT "\n");
 617         }
 618
 619         if (ops == NULL) {
 620                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
 621                                 vfd->name);
 622                 return -EINVAL;
 623         }
 624
 625 #ifdef CONFIG_VIDEO_V4L1_COMPAT
 626         /***********************************************************
 627          Handles calls to the obsoleted V4L1 API
 628          Due to the nature of VIDIOCGMBUF, each driver that supports
 629          V4L1 should implement its own handler for this ioctl.
 630          ***********************************************************/
 631
 632         /* --- streaming capture ------------------------------------- */
 633         if (cmd == VIDIOCGMBUF) {
 634                 struct video_mbuf *p = arg;
 635
 636                 if (!ops->vidiocgmbuf)
 637                         return ret;
 638                 ret = ops->vidiocgmbuf(file, fh, p);
 639                 if (!ret)
 640                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
 641                                                 p->size, p->frames,
 642                                                 (unsigned long)p->offsets);
 643                 return ret;
 644         }
 645
 646         /********************************************************
 647          All other V4L1 calls are handled by v4l1_compat module.
 648          Those calls will be translated into V4L2 calls, and
 649          __video_do_ioctl will be called again, with one or more
 650          V4L2 ioctls.
 651          ********************************************************/
 652         if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
 653                 return v4l_compat_translate_ioctl(file, cmd, arg,
 654                                                 __video_do_ioctl);
 655 #endif
 656
 657         switch (cmd) {
 658         /* --- capabilities ------------------------------------------ */
 659         case VIDIOC_QUERYCAP:
 660         {
 661                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 662
 663                 if (!ops->vidioc_querycap)
 664                         break;
 665
 666                 ret = ops->vidioc_querycap(file, fh, cap);
 667                 if (!ret)
 668                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 669                                         "version=0x%08x, "
 670                                         "capabilities=0x%08x\n",
 671                                         cap->driver, cap->card, cap->bus_info,
 672                                         cap->version,
 673                                         cap->capabilities);
 674                 break;
 675         }
 676
 677         /* --- priority ------------------------------------------ */
 678         case VIDIOC_G_PRIORITY:
 679         {
 680                 enum v4l2_priority *p = arg;
 681
 682                 if (!ops->vidioc_g_priority)
 683                         break;
 684                 ret = ops->vidioc_g_priority(file, fh, p);
 685                 if (!ret)
 686                         dbgarg(cmd, "priority is %d\n", *p);
 687                 break;
 688         }
 689         case VIDIOC_S_PRIORITY:
 690         {
 691                 enum v4l2_priority *p = arg;
 692
 693                 if (!ops->vidioc_s_priority)
 694                         break;
 695                 dbgarg(cmd, "setting priority to %d\n", *p);
 696                 ret = ops->vidioc_s_priority(file, fh, *p);
 697                 break;
 698         }
 699
 700         /* --- capture ioctls ---------------------------------------- */
 701         case VIDIOC_ENUM_FMT:
 702         {
 703                 struct v4l2_fmtdesc *f = arg;
 704
 705                 switch (f->type) {
 706                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 707                         if (ops->vidioc_enum_fmt_vid_cap)
 708                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
 709                         break;
 710                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 711                         if (ops->vidioc_enum_fmt_vid_overlay)
 712                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
 713                                         fh, f);
 714                         break;
 715                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 716                         if (ops->vidioc_enum_fmt_vid_out)
 717                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
 718                         break;
 719                 case V4L2_BUF_TYPE_PRIVATE:
 720                         if (ops->vidioc_enum_fmt_type_private)
 721                                 ret = ops->vidioc_enum_fmt_type_private(file,
 722                                                                 fh, f);
 723                         break;
 724                 default:
 725                         break;
 726                 }
 727                 if (!ret)
 728                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 729                                 "pixelformat=%c%c%c%c, description='%s'\n",
 730                                 f->index, f->type, f->flags,
 731                                 (f->pixelformat & 0xff),
 732                                 (f->pixelformat >>  8) & 0xff,
 733                                 (f->pixelformat >> 16) & 0xff,
 734                                 (f->pixelformat >> 24) & 0xff,
 735                                 f->description);
 736                 break;
 737         }
 738         case VIDIOC_G_FMT:
 739         {
 740                 struct v4l2_format *f = (struct v4l2_format *)arg;
 741
 742                 /* FIXME: Should be one dump per type */
 743                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 744
 745                 switch (f->type) {
 746                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 747                         if (ops->vidioc_g_fmt_vid_cap)
 748                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
 749                         if (!ret)
 750                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 751                         break;
 752                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 753                         if (ops->vidioc_g_fmt_vid_overlay)
 754                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
 755                                                                     fh, f);
 756                         break;
 757                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 758                         if (ops->vidioc_g_fmt_vid_out)
 759                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
 760                         if (!ret)
 761                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 762                         break;
 763                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 764                         if (ops->vidioc_g_fmt_vid_out_overlay)
 765                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
 766                                        fh, f);
 767                         break;
 768                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 769                         if (ops->vidioc_g_fmt_vbi_cap)
 770                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
 771                         break;
 772                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 773                         if (ops->vidioc_g_fmt_vbi_out)
 774                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
 775                         break;
 776                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 777                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
 778                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
 779                                                                         fh, f);
 780                         break;
 781                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 782                         if (ops->vidioc_g_fmt_sliced_vbi_out)
 783                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
 784                                                                         fh, f);
 785                         break;
 786                 case V4L2_BUF_TYPE_PRIVATE:
 787                         if (ops->vidioc_g_fmt_type_private)
 788                                 ret = ops->vidioc_g_fmt_type_private(file,
 789                                                                 fh, f);
 790                         break;
 791                 }
 792
 793                 break;
 794         }
 795         case VIDIOC_S_FMT:
 796         {
 797                 struct v4l2_format *f = (struct v4l2_format *)arg;
 798
 799                 /* FIXME: Should be one dump per type */
 800                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 801
 802                 switch (f->type) {
 803                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 804                         CLEAR_AFTER_FIELD(f, fmt.pix);
 805                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 806                         if (ops->vidioc_s_fmt_vid_cap)
 807                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
 808                         break;
 809                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 810                         CLEAR_AFTER_FIELD(f, fmt.win);
 811                         if (ops->vidioc_s_fmt_vid_overlay)
 812                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
 813                                                                     fh, f);
 814                         break;
 815                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 816                         CLEAR_AFTER_FIELD(f, fmt.pix);
 817                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 818                         if (ops->vidioc_s_fmt_vid_out)
 819                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
 820                         break;
 821                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 822                         CLEAR_AFTER_FIELD(f, fmt.win);
 823                         if (ops->vidioc_s_fmt_vid_out_overlay)
 824                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
 825                                         fh, f);
 826                         break;
 827                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 828                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 829                         if (ops->vidioc_s_fmt_vbi_cap)
 830                                 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
 831                         break;
 832                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 833                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 834                         if (ops->vidioc_s_fmt_vbi_out)
 835                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
 836                         break;
 837                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 838                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 839                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
 840                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
 841                                                                         fh, f);
 842                         break;
 843                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 844                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 845                         if (ops->vidioc_s_fmt_sliced_vbi_out)
 846                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
 847                                                                         fh, f);
 848                         break;
 849                 case V4L2_BUF_TYPE_PRIVATE:
 850                         /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
 851                         if (ops->vidioc_s_fmt_type_private)
 852                                 ret = ops->vidioc_s_fmt_type_private(file,
 853                                                                 fh, f);
 854                         break;
 855                 }
 856                 break;
 857         }
 858         case VIDIOC_TRY_FMT:
 859         {
 860                 struct v4l2_format *f = (struct v4l2_format *)arg;
 861
 862                 /* FIXME: Should be one dump per type */
 863                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 864                                                 v4l2_type_names));
 865                 switch (f->type) {
 866                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 867                         CLEAR_AFTER_FIELD(f, fmt.pix);
 868                         if (ops->vidioc_try_fmt_vid_cap)
 869                                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
 870                         if (!ret)
 871                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 872                         break;
 873                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 874                         CLEAR_AFTER_FIELD(f, fmt.win);
 875                         if (ops->vidioc_try_fmt_vid_overlay)
 876                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
 877                                         fh, f);
 878                         break;
 879                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 880                         CLEAR_AFTER_FIELD(f, fmt.pix);
 881                         if (ops->vidioc_try_fmt_vid_out)
 882                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
 883                         if (!ret)
 884                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 885                         break;
 886                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 887                         CLEAR_AFTER_FIELD(f, fmt.win);
 888                         if (ops->vidioc_try_fmt_vid_out_overlay)
 889                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
 890                                        fh, f);
 891                         break;
 892                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 893                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 894                         if (ops->vidioc_try_fmt_vbi_cap)
 895                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
 896                         break;
 897                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 898                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 899                         if (ops->vidioc_try_fmt_vbi_out)
 900                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
 901                         break;
 902                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 903                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 904                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
 905                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
 906                                                                 fh, f);
 907                         break;
 908                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 909                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 910                         if (ops->vidioc_try_fmt_sliced_vbi_out)
 911                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
 912                                                                 fh, f);
 913                         break;
 914                 case V4L2_BUF_TYPE_PRIVATE:
 915                         /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
 916                         if (ops->vidioc_try_fmt_type_private)
 917                                 ret = ops->vidioc_try_fmt_type_private(file,
 918                                                                 fh, f);
 919                         break;
 920                 }
 921
 922                 break;
 923         }
 924         /* FIXME: Those buf reqs could be handled here,
 925            with some changes on videobuf to allow its header to be included at
 926            videodev2.h or being merged at videodev2.
 927          */
 928         case VIDIOC_REQBUFS:
 929         {
 930                 struct v4l2_requestbuffers *p = arg;
 931
 932                 if (!ops->vidioc_reqbufs)
 933                         break;
 934                 ret = check_fmt(ops, p->type);
 935                 if (ret)
 936                         break;
 937
 938                 if (p->type < V4L2_BUF_TYPE_PRIVATE)
 939                         CLEAR_AFTER_FIELD(p, memory);
 940
 941                 ret = ops->vidioc_reqbufs(file, fh, p);
 942                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
 943                                 p->count,
 944                                 prt_names(p->type, v4l2_type_names),
 945                                 prt_names(p->memory, v4l2_memory_names));
 946                 break;
 947         }
 948         case VIDIOC_QUERYBUF:
 949         {
 950                 struct v4l2_buffer *p = arg;
 951
 952                 if (!ops->vidioc_querybuf)
 953                         break;
 954                 ret = check_fmt(ops, p->type);
 955                 if (ret)
 956                         break;
 957
 958                 ret = ops->vidioc_querybuf(file, fh, p);
 959                 if (!ret)
 960                         dbgbuf(cmd, vfd, p);
 961                 break;
 962         }
 963         case VIDIOC_QBUF:
 964         {
 965                 struct v4l2_buffer *p = arg;
 966
 967                 if (!ops->vidioc_qbuf)
 968                         break;
 969                 ret = check_fmt(ops, p->type);
 970                 if (ret)
 971                         break;
 972
 973                 ret = ops->vidioc_qbuf(file, fh, p);
 974                 if (!ret)
 975                         dbgbuf(cmd, vfd, p);
 976                 break;
 977         }
 978         case VIDIOC_DQBUF:
 979         {
 980                 struct v4l2_buffer *p = arg;
 981
 982                 if (!ops->vidioc_dqbuf)
 983                         break;
 984                 ret = check_fmt(ops, p->type);
 985                 if (ret)
 986                         break;
 987
 988                 ret = ops->vidioc_dqbuf(file, fh, p);
 989                 if (!ret)
 990                         dbgbuf(cmd, vfd, p);
 991                 break;
 992         }
 993         case VIDIOC_OVERLAY:
 994         {
 995                 int *i = arg;
 996
 997                 if (!ops->vidioc_overlay)
 998                         break;
 999                 dbgarg(cmd, "value=%d\n", *i);
1000                 ret = ops->vidioc_overlay(file, fh, *i);
1001                 break;
1002         }
1003         case VIDIOC_G_FBUF:
1004         {
1005                 struct v4l2_framebuffer *p = arg;
1006
1007                 if (!ops->vidioc_g_fbuf)
1008                         break;
1009                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1010                 if (!ret) {
1011                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1012                                         p->capability, p->flags,
1013                                         (unsigned long)p->base);
1014                         v4l_print_pix_fmt(vfd, &p->fmt);
1015                 }
1016                 break;
1017         }
1018         case VIDIOC_S_FBUF:
1019         {
1020                 struct v4l2_framebuffer *p = arg;
1021
1022                 if (!ops->vidioc_s_fbuf)
1023                         break;
1024                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1025                         p->capability, p->flags, (unsigned long)p->base);
1026                 v4l_print_pix_fmt(vfd, &p->fmt);
1027                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1028                 break;
1029         }
1030         case VIDIOC_STREAMON:
1031         {
1032                 enum v4l2_buf_type i = *(int *)arg;
1033
1034                 if (!ops->vidioc_streamon)
1035                         break;
1036                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1037                 ret = ops->vidioc_streamon(file, fh, i);
1038                 break;
1039         }
1040         case VIDIOC_STREAMOFF:
1041         {
1042                 enum v4l2_buf_type i = *(int *)arg;
1043
1044                 if (!ops->vidioc_streamoff)
1045                         break;
1046                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1047                 ret = ops->vidioc_streamoff(file, fh, i);
1048                 break;
1049         }
1050         /* ---------- tv norms ---------- */
1051         case VIDIOC_ENUMSTD:
1052         {
1053                 struct v4l2_standard *p = arg;
1054                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1055                 unsigned int index = p->index, i, j = 0;
1056                 const char *descr = "";
1057
1058                 /* Return norm array in a canonical way */
1059                 for (i = 0; i <= index && id; i++) {
1060                         /* last std value in the standards array is 0, so this
1061                            while always ends there since (id & 0) == 0. */
1062                         while ((id & standards[j].std) != standards[j].std)
1063                                 j++;
1064                         curr_id = standards[j].std;
1065                         descr = standards[j].descr;
1066                         j++;
1067                         if (curr_id == 0)
1068                                 break;
1069                         if (curr_id != V4L2_STD_PAL &&
1070                             curr_id != V4L2_STD_SECAM &&
1071                             curr_id != V4L2_STD_NTSC)
1072                                 id &= ~curr_id;
1073                 }
1074                 if (i <= index)
1075                         return -EINVAL;
1076
1077                 v4l2_video_std_construct(p, curr_id, descr);
1078
1079                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1080                                 "framelines=%d\n", p->index,
1081                                 (unsigned long long)p->id, p->name,
1082                                 p->frameperiod.numerator,
1083                                 p->frameperiod.denominator,
1084                                 p->framelines);
1085
1086                 ret = 0;
1087                 break;
1088         }
1089         case VIDIOC_G_STD:
1090         {
1091                 v4l2_std_id *id = arg;
1092
1093                 ret = 0;
1094                 /* Calls the specific handler */
1095                 if (ops->vidioc_g_std)
1096                         ret = ops->vidioc_g_std(file, fh, id);
1097                 else if (vfd->current_norm)
1098                         *id = vfd->current_norm;
1099                 else
1100                         ret = -EINVAL;
1101
1102                 if (!ret)
1103                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1104                 break;
1105         }
1106         case VIDIOC_S_STD:
1107         {
1108                 v4l2_std_id *id = arg, norm;
1109
1110                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1111
1112                 norm = (*id) & vfd->tvnorms;
1113                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1114                         break;
1115
1116                 /* Calls the specific handler */
1117                 if (ops->vidioc_s_std)
1118                         ret = ops->vidioc_s_std(file, fh, &norm);
1119                 else
1120                         ret = -EINVAL;
1121
1122                 /* Updates standard information */
1123                 if (ret >= 0)
1124                         vfd->current_norm = norm;
1125                 break;
1126         }
1127         case VIDIOC_QUERYSTD:
1128         {
1129                 v4l2_std_id *p = arg;
1130
1131                 if (!ops->vidioc_querystd)
1132                         break;
1133                 ret = ops->vidioc_querystd(file, fh, arg);
1134                 if (!ret)
1135                         dbgarg(cmd, "detected std=%08Lx\n",
1136                                                 (unsigned long long)*p);
1137                 break;
1138         }
1139         /* ------ input switching ---------- */
1140         /* FIXME: Inputs can be handled inside videodev2 */
1141         case VIDIOC_ENUMINPUT:
1142         {
1143                 struct v4l2_input *p = arg;
1144
1145                 /*
1146                  * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1147                  * CAP_STD here based on ioctl handler provided by the
1148                  * driver. If the driver doesn't support these
1149                  * for a specific input, it must override these flags.
1150                  */
1151                 if (ops->vidioc_s_std)
1152                         p->capabilities |= V4L2_IN_CAP_STD;
1153                 if (ops->vidioc_s_dv_preset)
1154                         p->capabilities |= V4L2_IN_CAP_PRESETS;
1155                 if (ops->vidioc_s_dv_timings)
1156                         p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1157
1158                 if (!ops->vidioc_enum_input)
1159                         break;
1160
1161                 ret = ops->vidioc_enum_input(file, fh, p);
1162                 if (!ret)
1163                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1164                                 "audioset=%d, "
1165                                 "tuner=%d, std=%08Lx, status=%d\n",
1166                                 p->index, p->name, p->type, p->audioset,
1167                                 p->tuner,
1168                                 (unsigned long long)p->std,
1169                                 p->status);
1170                 break;
1171         }
1172         case VIDIOC_G_INPUT:
1173         {
1174                 unsigned int *i = arg;
1175
1176                 if (!ops->vidioc_g_input)
1177                         break;
1178                 ret = ops->vidioc_g_input(file, fh, i);
1179                 if (!ret)
1180                         dbgarg(cmd, "value=%d\n", *i);
1181                 break;
1182         }
1183         case VIDIOC_S_INPUT:
1184         {
1185                 unsigned int *i = arg;
1186
1187                 if (!ops->vidioc_s_input)
1188                         break;
1189                 dbgarg(cmd, "value=%d\n", *i);
1190                 ret = ops->vidioc_s_input(file, fh, *i);
1191                 break;
1192         }
1193
1194         /* ------ output switching ---------- */
1195         case VIDIOC_ENUMOUTPUT:
1196         {
1197                 struct v4l2_output *p = arg;
1198
1199                 if (!ops->vidioc_enum_output)
1200                         break;
1201
1202                 /*
1203                  * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1204                  * CAP_STD here based on ioctl handler provided by the
1205                  * driver. If the driver doesn't support these
1206                  * for a specific output, it must override these flags.
1207                  */
1208                 if (ops->vidioc_s_std)
1209                         p->capabilities |= V4L2_OUT_CAP_STD;
1210                 if (ops->vidioc_s_dv_preset)
1211                         p->capabilities |= V4L2_OUT_CAP_PRESETS;
1212                 if (ops->vidioc_s_dv_timings)
1213                         p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1214
1215                 ret = ops->vidioc_enum_output(file, fh, p);
1216                 if (!ret)
1217                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1218                                 "audioset=0x%x, "
1219                                 "modulator=%d, std=0x%08Lx\n",
1220                                 p->index, p->name, p->type, p->audioset,
1221                                 p->modulator, (unsigned long long)p->std);
1222                 break;
1223         }
1224         case VIDIOC_G_OUTPUT:
1225         {
1226                 unsigned int *i = arg;
1227
1228                 if (!ops->vidioc_g_output)
1229                         break;
1230                 ret = ops->vidioc_g_output(file, fh, i);
1231                 if (!ret)
1232                         dbgarg(cmd, "value=%d\n", *i);
1233                 break;
1234         }
1235         case VIDIOC_S_OUTPUT:
1236         {
1237                 unsigned int *i = arg;
1238
1239                 if (!ops->vidioc_s_output)
1240                         break;
1241                 dbgarg(cmd, "value=%d\n", *i);
1242                 ret = ops->vidioc_s_output(file, fh, *i);
1243                 break;
1244         }
1245
1246         /* --- controls ---------------------------------------------- */
1247         case VIDIOC_QUERYCTRL:
1248         {
1249                 struct v4l2_queryctrl *p = arg;
1250
1251                 if (!ops->vidioc_queryctrl)
1252                         break;
1253                 ret = ops->vidioc_queryctrl(file, fh, p);
1254                 if (!ret)
1255                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1256                                         "step=%d, default=%d, flags=0x%08x\n",
1257                                         p->id, p->type, p->name,
1258                                         p->minimum, p->maximum,
1259                                         p->step, p->default_value, p->flags);
1260                 else
1261                         dbgarg(cmd, "id=0x%x\n", p->id);
1262                 break;
1263         }
1264         case VIDIOC_G_CTRL:
1265         {
1266                 struct v4l2_control *p = arg;
1267
1268                 if (ops->vidioc_g_ctrl)
1269                         ret = ops->vidioc_g_ctrl(file, fh, p);
1270                 else if (ops->vidioc_g_ext_ctrls) {
1271                         struct v4l2_ext_controls ctrls;
1272                         struct v4l2_ext_control ctrl;
1273
1274                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1275                         ctrls.count = 1;
1276                         ctrls.controls = &ctrl;
1277                         ctrl.id = p->id;
1278                         ctrl.value = p->value;
1279                         if (check_ext_ctrls(&ctrls, 1)) {
1280                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1281                                 if (ret == 0)
1282                                         p->value = ctrl.value;
1283                         }
1284                 } else
1285                         break;
1286                 if (!ret)
1287                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1288                 else
1289                         dbgarg(cmd, "id=0x%x\n", p->id);
1290                 break;
1291         }
1292         case VIDIOC_S_CTRL:
1293         {
1294                 struct v4l2_control *p = arg;
1295                 struct v4l2_ext_controls ctrls;
1296                 struct v4l2_ext_control ctrl;
1297
1298                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1299                         break;
1300
1301                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1302
1303                 if (ops->vidioc_s_ctrl) {
1304                         ret = ops->vidioc_s_ctrl(file, fh, p);
1305                         break;
1306                 }
1307                 if (!ops->vidioc_s_ext_ctrls)
1308                         break;
1309
1310                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1311                 ctrls.count = 1;
1312                 ctrls.controls = &ctrl;
1313                 ctrl.id = p->id;
1314                 ctrl.value = p->value;
1315                 if (check_ext_ctrls(&ctrls, 1))
1316                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1317                 break;
1318         }
1319         case VIDIOC_G_EXT_CTRLS:
1320         {
1321                 struct v4l2_ext_controls *p = arg;
1322
1323                 p->error_idx = p->count;
1324                 if (!ops->vidioc_g_ext_ctrls)
1325                         break;
1326                 if (check_ext_ctrls(p, 0))
1327                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1328                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1329                 break;
1330         }
1331         case VIDIOC_S_EXT_CTRLS:
1332         {
1333                 struct v4l2_ext_controls *p = arg;
1334
1335                 p->error_idx = p->count;
1336                 if (!ops->vidioc_s_ext_ctrls)
1337                         break;
1338                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1339                 if (check_ext_ctrls(p, 0))
1340                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1341                 break;
1342         }
1343         case VIDIOC_TRY_EXT_CTRLS:
1344         {
1345                 struct v4l2_ext_controls *p = arg;
1346
1347                 p->error_idx = p->count;
1348                 if (!ops->vidioc_try_ext_ctrls)
1349                         break;
1350                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1351                 if (check_ext_ctrls(p, 0))
1352                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1353                 break;
1354         }
1355         case VIDIOC_QUERYMENU:
1356         {
1357                 struct v4l2_querymenu *p = arg;
1358
1359                 if (!ops->vidioc_querymenu)
1360                         break;
1361                 ret = ops->vidioc_querymenu(file, fh, p);
1362                 if (!ret)
1363                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1364                                 p->id, p->index, p->name);
1365                 else
1366                         dbgarg(cmd, "id=0x%x, index=%d\n",
1367                                 p->id, p->index);
1368                 break;
1369         }
1370         /* --- audio ---------------------------------------------- */
1371         case VIDIOC_ENUMAUDIO:
1372         {
1373                 struct v4l2_audio *p = arg;
1374
1375                 if (!ops->vidioc_enumaudio)
1376                         break;
1377                 ret = ops->vidioc_enumaudio(file, fh, p);
1378                 if (!ret)
1379                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1380                                         "mode=0x%x\n", p->index, p->name,
1381                                         p->capability, p->mode);
1382                 else
1383                         dbgarg(cmd, "index=%d\n", p->index);
1384                 break;
1385         }
1386         case VIDIOC_G_AUDIO:
1387         {
1388                 struct v4l2_audio *p = arg;
1389
1390                 if (!ops->vidioc_g_audio)
1391                         break;
1392
1393                 ret = ops->vidioc_g_audio(file, fh, p);
1394                 if (!ret)
1395                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1396                                         "mode=0x%x\n", p->index,
1397                                         p->name, p->capability, p->mode);
1398                 else
1399                         dbgarg(cmd, "index=%d\n", p->index);
1400                 break;
1401         }
1402         case VIDIOC_S_AUDIO:
1403         {
1404                 struct v4l2_audio *p = arg;
1405
1406                 if (!ops->vidioc_s_audio)
1407                         break;
1408                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1409                                         "mode=0x%x\n", p->index, p->name,
1410                                         p->capability, p->mode);
1411                 ret = ops->vidioc_s_audio(file, fh, p);
1412                 break;
1413         }
1414         case VIDIOC_ENUMAUDOUT:
1415         {
1416                 struct v4l2_audioout *p = arg;
1417
1418                 if (!ops->vidioc_enumaudout)
1419                         break;
1420                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1421                 ret = ops->vidioc_enumaudout(file, fh, p);
1422                 if (!ret)
1423                         dbgarg2("index=%d, name=%s, capability=%d, "
1424                                         "mode=%d\n", p->index, p->name,
1425                                         p->capability, p->mode);
1426                 break;
1427         }
1428         case VIDIOC_G_AUDOUT:
1429         {
1430                 struct v4l2_audioout *p = arg;
1431
1432                 if (!ops->vidioc_g_audout)
1433                         break;
1434
1435                 ret = ops->vidioc_g_audout(file, fh, p);
1436                 if (!ret)
1437                         dbgarg2("index=%d, name=%s, capability=%d, "
1438                                         "mode=%d\n", p->index, p->name,
1439                                         p->capability, p->mode);
1440                 break;
1441         }
1442         case VIDIOC_S_AUDOUT:
1443         {
1444                 struct v4l2_audioout *p = arg;
1445
1446                 if (!ops->vidioc_s_audout)
1447                         break;
1448                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1449                                         "mode=%d\n", p->index, p->name,
1450                                         p->capability, p->mode);
1451
1452                 ret = ops->vidioc_s_audout(file, fh, p);
1453                 break;
1454         }
1455         case VIDIOC_G_MODULATOR:
1456         {
1457                 struct v4l2_modulator *p = arg;
1458
1459                 if (!ops->vidioc_g_modulator)
1460                         break;
1461                 ret = ops->vidioc_g_modulator(file, fh, p);
1462                 if (!ret)
1463                         dbgarg(cmd, "index=%d, name=%s, "
1464                                         "capability=%d, rangelow=%d,"
1465                                         " rangehigh=%d, txsubchans=%d\n",
1466                                         p->index, p->name, p->capability,
1467                                         p->rangelow, p->rangehigh,
1468                                         p->txsubchans);
1469                 break;
1470         }
1471         case VIDIOC_S_MODULATOR:
1472         {
1473                 struct v4l2_modulator *p = arg;
1474
1475                 if (!ops->vidioc_s_modulator)
1476                         break;
1477                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1478                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1479                                 p->index, p->name, p->capability, p->rangelow,
1480                                 p->rangehigh, p->txsubchans);
1481                         ret = ops->vidioc_s_modulator(file, fh, p);
1482                 break;
1483         }
1484         case VIDIOC_G_CROP:
1485         {
1486                 struct v4l2_crop *p = arg;
1487
1488                 if (!ops->vidioc_g_crop)
1489                         break;
1490
1491                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1492                 ret = ops->vidioc_g_crop(file, fh, p);
1493                 if (!ret)
1494                         dbgrect(vfd, "", &p->c);
1495                 break;
1496         }
1497         case VIDIOC_S_CROP:
1498         {
1499                 struct v4l2_crop *p = arg;
1500
1501                 if (!ops->vidioc_s_crop)
1502                         break;
1503                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1504                 dbgrect(vfd, "", &p->c);
1505                 ret = ops->vidioc_s_crop(file, fh, p);
1506                 break;
1507         }
1508         case VIDIOC_CROPCAP:
1509         {
1510                 struct v4l2_cropcap *p = arg;
1511
1512                 /*FIXME: Should also show v4l2_fract pixelaspect */
1513                 if (!ops->vidioc_cropcap)
1514                         break;
1515
1516                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1517                 ret = ops->vidioc_cropcap(file, fh, p);
1518                 if (!ret) {
1519                         dbgrect(vfd, "bounds ", &p->bounds);
1520                         dbgrect(vfd, "defrect ", &p->defrect);
1521                 }
1522                 break;
1523         }
1524         case VIDIOC_G_JPEGCOMP:
1525         {
1526                 struct v4l2_jpegcompression *p = arg;
1527
1528                 if (!ops->vidioc_g_jpegcomp)
1529                         break;
1530
1531                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1532                 if (!ret)
1533                         dbgarg(cmd, "quality=%d, APPn=%d, "
1534                                         "APP_len=%d, COM_len=%d, "
1535                                         "jpeg_markers=%d\n",
1536                                         p->quality, p->APPn, p->APP_len,
1537                                         p->COM_len, p->jpeg_markers);
1538                 break;
1539         }
1540         case VIDIOC_S_JPEGCOMP:
1541         {
1542                 struct v4l2_jpegcompression *p = arg;
1543
1544                 if (!ops->vidioc_g_jpegcomp)
1545                         break;
1546                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1547                                         "COM_len=%d, jpeg_markers=%d\n",
1548                                         p->quality, p->APPn, p->APP_len,
1549                                         p->COM_len, p->jpeg_markers);
1550                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1551                 break;
1552         }
1553         case VIDIOC_G_ENC_INDEX:
1554         {
1555                 struct v4l2_enc_idx *p = arg;
1556
1557                 if (!ops->vidioc_g_enc_index)
1558                         break;
1559                 ret = ops->vidioc_g_enc_index(file, fh, p);
1560                 if (!ret)
1561                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1562                                         p->entries, p->entries_cap);
1563                 break;
1564         }
1565         case VIDIOC_ENCODER_CMD:
1566         {
1567                 struct v4l2_encoder_cmd *p = arg;
1568
1569                 if (!ops->vidioc_encoder_cmd)
1570                         break;
1571                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1572                 if (!ret)
1573                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1574                 break;
1575         }
1576         case VIDIOC_TRY_ENCODER_CMD:
1577         {
1578                 struct v4l2_encoder_cmd *p = arg;
1579
1580                 if (!ops->vidioc_try_encoder_cmd)
1581                         break;
1582                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1583                 if (!ret)
1584                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1585                 break;
1586         }
1587         case VIDIOC_G_PARM:
1588         {
1589                 struct v4l2_streamparm *p = arg;
1590
1591                 if (ops->vidioc_g_parm) {
1592                         ret = check_fmt(ops, p->type);
1593                         if (ret)
1594                                 break;
1595                         ret = ops->vidioc_g_parm(file, fh, p);
1596                 } else {
1597                         v4l2_std_id std = vfd->current_norm;
1598
1599                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1600                                 return -EINVAL;
1601
1602                         ret = 0;
1603                         if (ops->vidioc_g_std)
1604                                 ret = ops->vidioc_g_std(file, fh, &std);
1605                         else if (std == 0)
1606                                 ret = -EINVAL;
1607                         if (ret == 0)
1608                                 v4l2_video_std_frame_period(std,
1609                                                     &p->parm.capture.timeperframe);
1610                 }
1611
1612                 dbgarg(cmd, "type=%d\n", p->type);
1613                 break;
1614         }
1615         case VIDIOC_S_PARM:
1616         {
1617                 struct v4l2_streamparm *p = arg;
1618
1619                 if (!ops->vidioc_s_parm)
1620                         break;
1621                 ret = check_fmt(ops, p->type);
1622                 if (ret)
1623                         break;
1624
1625                 dbgarg(cmd, "type=%d\n", p->type);
1626                 ret = ops->vidioc_s_parm(file, fh, p);
1627                 break;
1628         }
1629         case VIDIOC_G_TUNER:
1630         {
1631                 struct v4l2_tuner *p = arg;
1632
1633                 if (!ops->vidioc_g_tuner)
1634                         break;
1635
1636                 ret = ops->vidioc_g_tuner(file, fh, p);
1637                 if (!ret)
1638                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1639                                         "capability=0x%x, rangelow=%d, "
1640                                         "rangehigh=%d, signal=%d, afc=%d, "
1641                                         "rxsubchans=0x%x, audmode=%d\n",
1642                                         p->index, p->name, p->type,
1643                                         p->capability, p->rangelow,
1644                                         p->rangehigh, p->signal, p->afc,
1645                                         p->rxsubchans, p->audmode);
1646                 break;
1647         }
1648         case VIDIOC_S_TUNER:
1649         {
1650                 struct v4l2_tuner *p = arg;
1651
1652                 if (!ops->vidioc_s_tuner)
1653                         break;
1654                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1655                                 "capability=0x%x, rangelow=%d, "
1656                                 "rangehigh=%d, signal=%d, afc=%d, "
1657                                 "rxsubchans=0x%x, audmode=%d\n",
1658                                 p->index, p->name, p->type,
1659                                 p->capability, p->rangelow,
1660                                 p->rangehigh, p->signal, p->afc,
1661                                 p->rxsubchans, p->audmode);
1662                 ret = ops->vidioc_s_tuner(file, fh, p);
1663                 break;
1664         }
1665         case VIDIOC_G_FREQUENCY:
1666         {
1667                 struct v4l2_frequency *p = arg;
1668
1669                 if (!ops->vidioc_g_frequency)
1670                         break;
1671
1672                 ret = ops->vidioc_g_frequency(file, fh, p);
1673                 if (!ret)
1674                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1675                                         p->tuner, p->type, p->frequency);
1676                 break;
1677         }
1678         case VIDIOC_S_FREQUENCY:
1679         {
1680                 struct v4l2_frequency *p = arg;
1681
1682                 if (!ops->vidioc_s_frequency)
1683                         break;
1684                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1685                                 p->tuner, p->type, p->frequency);
1686                 ret = ops->vidioc_s_frequency(file, fh, p);
1687                 break;
1688         }
1689         case VIDIOC_G_SLICED_VBI_CAP:
1690         {
1691                 struct v4l2_sliced_vbi_cap *p = arg;
1692
1693                 if (!ops->vidioc_g_sliced_vbi_cap)
1694                         break;
1695
1696                 /* Clear up to type, everything after type is zerod already */
1697                 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1698
1699                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1700                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1701                 if (!ret)
1702                         dbgarg2("service_set=%d\n", p->service_set);
1703                 break;
1704         }
1705         case VIDIOC_LOG_STATUS:
1706         {
1707                 if (!ops->vidioc_log_status)
1708                         break;
1709                 ret = ops->vidioc_log_status(file, fh);
1710                 break;
1711         }
1712 #ifdef CONFIG_VIDEO_ADV_DEBUG
1713         case VIDIOC_DBG_G_REGISTER:
1714         {
1715                 struct v4l2_dbg_register *p = arg;
1716
1717                 if (!capable(CAP_SYS_ADMIN))
1718                         ret = -EPERM;
1719                 else if (ops->vidioc_g_register)
1720                         ret = ops->vidioc_g_register(file, fh, p);
1721                 break;
1722         }
1723         case VIDIOC_DBG_S_REGISTER:
1724         {
1725                 struct v4l2_dbg_register *p = arg;
1726
1727                 if (!capable(CAP_SYS_ADMIN))
1728                         ret = -EPERM;
1729                 else if (ops->vidioc_s_register)
1730                         ret = ops->vidioc_s_register(file, fh, p);
1731                 break;
1732         }
1733 #endif
1734         case VIDIOC_DBG_G_CHIP_IDENT:
1735         {
1736                 struct v4l2_dbg_chip_ident *p = arg;
1737
1738                 if (!ops->vidioc_g_chip_ident)
1739                         break;
1740                 p->ident = V4L2_IDENT_NONE;
1741                 p->revision = 0;
1742                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1743                 if (!ret)
1744                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1745                 break;
1746         }
1747         case VIDIOC_S_HW_FREQ_SEEK:
1748         {
1749                 struct v4l2_hw_freq_seek *p = arg;
1750
1751                 if (!ops->vidioc_s_hw_freq_seek)
1752                         break;
1753                 dbgarg(cmd,
1754                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1755                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1756                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1757                 break;
1758         }
1759         case VIDIOC_ENUM_FRAMESIZES:
1760         {
1761                 struct v4l2_frmsizeenum *p = arg;
1762
1763                 if (!ops->vidioc_enum_framesizes)
1764                         break;
1765
1766                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1767                 dbgarg(cmd,
1768                         "index=%d, pixelformat=%c%c%c%c, type=%d ",
1769                         p->index,
1770                         (p->pixel_format & 0xff),
1771                         (p->pixel_format >>  8) & 0xff,
1772                         (p->pixel_format >> 16) & 0xff,
1773                         (p->pixel_format >> 24) & 0xff,
1774                         p->type);
1775                 switch (p->type) {
1776                 case V4L2_FRMSIZE_TYPE_DISCRETE:
1777                         dbgarg3("width = %d, height=%d\n",
1778                                 p->discrete.width, p->discrete.height);
1779                         break;
1780                 case V4L2_FRMSIZE_TYPE_STEPWISE:
1781                         dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
1782                                 p->stepwise.min_width,  p->stepwise.min_height,
1783                                 p->stepwise.step_width, p->stepwise.step_height,
1784                                 p->stepwise.max_width,  p->stepwise.max_height);
1785                         break;
1786                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1787                         dbgarg3("continuous\n");
1788                         break;
1789                 default:
1790                         dbgarg3("- Unknown type!\n");
1791                 }
1792
1793                 break;
1794         }
1795         case VIDIOC_ENUM_FRAMEINTERVALS:
1796         {
1797                 struct v4l2_frmivalenum *p = arg;
1798
1799                 if (!ops->vidioc_enum_frameintervals)
1800                         break;
1801
1802                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1803                 dbgarg(cmd,
1804                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1805                         p->index, p->pixel_format,
1806                         p->width, p->height, p->type);
1807                 switch (p->type) {
1808                 case V4L2_FRMIVAL_TYPE_DISCRETE:
1809                         dbgarg2("fps=%d/%d\n",
1810                                 p->discrete.numerator,
1811                                 p->discrete.denominator);
1812                         break;
1813                 case V4L2_FRMIVAL_TYPE_STEPWISE:
1814                         dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1815                                 p->stepwise.min.numerator,
1816                                 p->stepwise.min.denominator,
1817                                 p->stepwise.max.numerator,
1818                                 p->stepwise.max.denominator,
1819                                 p->stepwise.step.numerator,
1820                                 p->stepwise.step.denominator);
1821                         break;
1822                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1823                         dbgarg2("continuous\n");
1824                         break;
1825                 default:
1826                         dbgarg2("- Unknown type!\n");
1827                 }
1828                 break;
1829         }
1830         case VIDIOC_ENUM_DV_PRESETS:
1831         {
1832                 struct v4l2_dv_enum_preset *p = arg;
1833
1834                 if (!ops->vidioc_enum_dv_presets)
1835                         break;
1836
1837                 ret = ops->vidioc_enum_dv_presets(file, fh, p);
1838                 if (!ret)
1839                         dbgarg(cmd,
1840                                 "index=%d, preset=%d, name=%s, width=%d,"
1841                                 " height=%d ",
1842                                 p->index, p->preset, p->name, p->width,
1843                                 p->height);
1844                 break;
1845         }
1846         case VIDIOC_S_DV_PRESET:
1847         {
1848                 struct v4l2_dv_preset *p = arg;
1849
1850                 if (!ops->vidioc_s_dv_preset)
1851                         break;
1852
1853                 dbgarg(cmd, "preset=%d\n", p->preset);
1854                 ret = ops->vidioc_s_dv_preset(file, fh, p);
1855                 break;
1856         }
1857         case VIDIOC_G_DV_PRESET:
1858         {
1859                 struct v4l2_dv_preset *p = arg;
1860
1861                 if (!ops->vidioc_g_dv_preset)
1862                         break;
1863
1864                 ret = ops->vidioc_g_dv_preset(file, fh, p);
1865                 if (!ret)
1866                         dbgarg(cmd, "preset=%d\n", p->preset);
1867                 break;
1868         }
1869         case VIDIOC_QUERY_DV_PRESET:
1870         {
1871                 struct v4l2_dv_preset *p = arg;
1872
1873                 if (!ops->vidioc_query_dv_preset)
1874                         break;
1875
1876                 ret = ops->vidioc_query_dv_preset(file, fh, p);
1877                 if (!ret)
1878                         dbgarg(cmd, "preset=%d\n", p->preset);
1879                 break;
1880         }
1881         case VIDIOC_S_DV_TIMINGS:
1882         {
1883                 struct v4l2_dv_timings *p = arg;
1884
1885                 if (!ops->vidioc_s_dv_timings)
1886                         break;
1887
1888                 switch (p->type) {
1889                 case V4L2_DV_BT_656_1120:
1890                         dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
1891                                 " width=%d, height=%d, polarities=%x,"
1892                                 " hfrontporch=%d, hsync=%d, hbackporch=%d,"
1893                                 " vfrontporch=%d, vsync=%d, vbackporch=%d,"
1894                                 " il_vfrontporch=%d, il_vsync=%d,"
1895                                 " il_vbackporch=%d\n",
1896                                 p->bt.interlaced, p->bt.pixelclock,
1897                                 p->bt.width, p->bt.height, p->bt.polarities,
1898                                 p->bt.hfrontporch, p->bt.hsync,
1899                                 p->bt.hbackporch, p->bt.vfrontporch,
1900                                 p->bt.vsync, p->bt.vbackporch,
1901                                 p->bt.il_vfrontporch, p->bt.il_vsync,
1902                                 p->bt.il_vbackporch);
1903                         ret = ops->vidioc_s_dv_timings(file, fh, p);
1904                         break;
1905                 default:
1906                         dbgarg2("Unknown type %d!\n", p->type);
1907                         break;
1908                 }
1909                 break;
1910         }
1911         case VIDIOC_G_DV_TIMINGS:
1912         {
1913                 struct v4l2_dv_timings *p = arg;
1914
1915                 if (!ops->vidioc_g_dv_timings)
1916                         break;
1917
1918                 ret = ops->vidioc_g_dv_timings(file, fh, p);
1919                 if (!ret) {
1920                         switch (p->type) {
1921                         case V4L2_DV_BT_656_1120:
1922                                 dbgarg2("bt-656/1120:interlaced=%d,"
1923                                         " pixelclock=%lld,"
1924                                         " width=%d, height=%d, polarities=%x,"
1925                                         " hfrontporch=%d, hsync=%d,"
1926                                         " hbackporch=%d, vfrontporch=%d,"
1927                                         " vsync=%d, vbackporch=%d,"
1928                                         " il_vfrontporch=%d, il_vsync=%d,"
1929                                         " il_vbackporch=%d\n",
1930                                         p->bt.interlaced, p->bt.pixelclock,
1931                                         p->bt.width, p->bt.height,
1932                                         p->bt.polarities, p->bt.hfrontporch,
1933                                         p->bt.hsync, p->bt.hbackporch,
1934                                         p->bt.vfrontporch, p->bt.vsync,
1935                                         p->bt.vbackporch, p->bt.il_vfrontporch,
1936                                         p->bt.il_vsync, p->bt.il_vbackporch);
1937                                 break;
1938                         default:
1939                                 dbgarg2("Unknown type %d!\n", p->type);
1940                                 break;
1941                         }
1942                 }
1943                 break;
1944         }
1945
1946         default:
1947         {
1948                 if (!ops->vidioc_default)
1949                         break;
1950                 ret = ops->vidioc_default(file, fh, cmd, arg);
1951                 break;
1952         }
1953         } /* switch */
1954
1955         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1956                 if (ret < 0) {
1957                         v4l_print_ioctl(vfd->name, cmd);
1958                         printk(KERN_CONT " error %ld\n", ret);
1959                 }
1960         }
1961
1962         return ret;
1963 }
1964
1965 /* In some cases, only a few fields are used as input, i.e. when the app sets
1966  * "index" and then the driver fills in the rest of the structure for the thing
1967  * with that index.  We only need to copy up the first non-input field.  */
1968 static unsigned long cmd_input_size(unsigned int cmd)
1969 {
1970         /* Size of structure up to and including 'field' */
1971 #define CMDINSIZE(cmd, type, field)                             \
1972         case VIDIOC_##cmd:                                      \
1973                 return offsetof(struct v4l2_##type, field) +    \
1974                         sizeof(((struct v4l2_##type *)0)->field);
1975
1976         switch (cmd) {
1977                 CMDINSIZE(ENUM_FMT,             fmtdesc,        type);
1978                 CMDINSIZE(G_FMT,                format,         type);
1979                 CMDINSIZE(QUERYBUF,             buffer,         type);
1980                 CMDINSIZE(G_PARM,               streamparm,     type);
1981                 CMDINSIZE(ENUMSTD,              standard,       index);
1982                 CMDINSIZE(ENUMINPUT,            input,          index);
1983                 CMDINSIZE(G_CTRL,               control,        id);
1984                 CMDINSIZE(G_TUNER,              tuner,          index);
1985                 CMDINSIZE(QUERYCTRL,            queryctrl,      id);
1986                 CMDINSIZE(QUERYMENU,            querymenu,      index);
1987                 CMDINSIZE(ENUMOUTPUT,           output,         index);
1988                 CMDINSIZE(G_MODULATOR,          modulator,      index);
1989                 CMDINSIZE(G_FREQUENCY,          frequency,      tuner);
1990                 CMDINSIZE(CROPCAP,              cropcap,        type);
1991                 CMDINSIZE(G_CROP,               crop,           type);
1992                 CMDINSIZE(ENUMAUDIO,            audio,          index);
1993                 CMDINSIZE(ENUMAUDOUT,           audioout,       index);
1994                 CMDINSIZE(ENCODER_CMD,          encoder_cmd,    flags);
1995                 CMDINSIZE(TRY_ENCODER_CMD,      encoder_cmd,    flags);
1996                 CMDINSIZE(G_SLICED_VBI_CAP,     sliced_vbi_cap, type);
1997                 CMDINSIZE(ENUM_FRAMESIZES,      frmsizeenum,    pixel_format);
1998                 CMDINSIZE(ENUM_FRAMEINTERVALS,  frmivalenum,    height);
1999         default:
2000                 return _IOC_SIZE(cmd);
2001         }
2002 }
2003
2004 long video_ioctl2(struct file *file,
2005                unsigned int cmd, unsigned long arg)
2006 {
2007         char    sbuf[128];
2008         void    *mbuf = NULL;
2009         void    *parg = NULL;
2010         long    err  = -EINVAL;
2011         int     is_ext_ctrl;
2012         size_t  ctrls_size = 0;
2013         void __user *user_ptr = NULL;
2014
2015 #ifdef __OLD_VIDIOC_
2016         cmd = video_fix_command(cmd);
2017 #endif
2018         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
2019                        cmd == VIDIOC_TRY_EXT_CTRLS);
2020
2021         /*  Copy arguments into temp kernel buffer  */
2022         if (_IOC_DIR(cmd) != _IOC_NONE) {
2023                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2024                         parg = sbuf;
2025                 } else {
2026                         /* too big to allocate from stack */
2027                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2028                         if (NULL == mbuf)
2029                                 return -ENOMEM;
2030                         parg = mbuf;
2031                 }
2032
2033                 err = -EFAULT;
2034                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2035                         unsigned long n = cmd_input_size(cmd);
2036
2037                         if (copy_from_user(parg, (void __user *)arg, n))
2038                                 goto out;
2039
2040                         /* zero out anything we don't copy from userspace */
2041                         if (n < _IOC_SIZE(cmd))
2042                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2043                 } else {
2044                         /* read-only ioctl */
2045                         memset(parg, 0, _IOC_SIZE(cmd));
2046                 }
2047         }
2048
2049         if (is_ext_ctrl) {
2050                 struct v4l2_ext_controls *p = parg;
2051
2052                 /* In case of an error, tell the caller that it wasn't
2053                    a specific control that caused it. */
2054                 p->error_idx = p->count;
2055                 user_ptr = (void __user *)p->controls;
2056                 if (p->count) {
2057                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
2058                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
2059                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
2060                         err = -ENOMEM;
2061                         if (NULL == mbuf)
2062                                 goto out_ext_ctrl;
2063                         err = -EFAULT;
2064                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
2065                                 goto out_ext_ctrl;
2066                         p->controls = mbuf;
2067                 }
2068         }
2069
2070         /* Handles IOCTL */
2071         err = __video_do_ioctl(file, cmd, parg);
2072         if (err == -ENOIOCTLCMD)
2073                 err = -EINVAL;
2074         if (is_ext_ctrl) {
2075                 struct v4l2_ext_controls *p = parg;
2076
2077                 p->controls = (void *)user_ptr;
2078                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
2079                         err = -EFAULT;
2080                 goto out_ext_ctrl;
2081         }
2082         if (err < 0)
2083                 goto out;
2084
2085 out_ext_ctrl:
2086         /*  Copy results into user buffer  */
2087         switch (_IOC_DIR(cmd)) {
2088         case _IOC_READ:
2089         case (_IOC_WRITE | _IOC_READ):
2090                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2091                         err = -EFAULT;
2092                 break;
2093         }
2094
2095 out:
2096         kfree(mbuf);
2097         return err;
2098 }
2099 EXPORT_SYMBOL(video_ioctl2);