drivers/media/v4l2-core/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 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-core.h>
  30
  31 #include <trace/events/v4l2.h>
  32
  33 /* Zero out the end of the struct pointed to by p.  Everything after, but
  34  * not including, the specified field is cleared. */
  35 #define CLEAR_AFTER_FIELD(p, field) \
  36         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  37         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  38
  39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  40
  41 struct std_descr {
  42         v4l2_std_id std;
  43         const char *descr;
  44 };
  45
  46 static const struct std_descr standards[] = {
  47         { V4L2_STD_NTSC,        "NTSC"      },
  48         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  49         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  50         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  51         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  52         { V4L2_STD_PAL,         "PAL"       },
  53         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  54         { V4L2_STD_PAL_B,       "PAL-B"     },
  55         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  56         { V4L2_STD_PAL_G,       "PAL-G"     },
  57         { V4L2_STD_PAL_H,       "PAL-H"     },
  58         { V4L2_STD_PAL_I,       "PAL-I"     },
  59         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  60         { V4L2_STD_PAL_D,       "PAL-D"     },
  61         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  62         { V4L2_STD_PAL_K,       "PAL-K"     },
  63         { V4L2_STD_PAL_M,       "PAL-M"     },
  64         { V4L2_STD_PAL_N,       "PAL-N"     },
  65         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  66         { V4L2_STD_PAL_60,      "PAL-60"    },
  67         { V4L2_STD_SECAM,       "SECAM"     },
  68         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  69         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  70         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  71         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  72         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  73         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  74         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  75         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  76         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  77         { 0,                    "Unknown"   }
  78 };
  79
  80 /* video4linux standard ID conversion to standard name
  81  */
  82 const char *v4l2_norm_to_name(v4l2_std_id id)
  83 {
  84         u32 myid = id;
  85         int i;
  86
  87         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  88            64 bit comparations. So, on that architecture, with some gcc
  89            variants, compilation fails. Currently, the max value is 30bit wide.
  90          */
  91         BUG_ON(myid != id);
  92
  93         for (i = 0; standards[i].std; i++)
  94                 if (myid == standards[i].std)
  95                         break;
  96         return standards[i].descr;
  97 }
  98 EXPORT_SYMBOL(v4l2_norm_to_name);
  99
 100 /* Returns frame period for the given standard */
 101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 102 {
 103         if (id & V4L2_STD_525_60) {
 104                 frameperiod->numerator = 1001;
 105                 frameperiod->denominator = 30000;
 106         } else {
 107                 frameperiod->numerator = 1;
 108                 frameperiod->denominator = 25;
 109         }
 110 }
 111 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 112
 113 /* Fill in the fields of a v4l2_standard structure according to the
 114    'id' and 'transmission' parameters.  Returns negative on error.  */
 115 int v4l2_video_std_construct(struct v4l2_standard *vs,
 116                              int id, const char *name)
 117 {
 118         vs->id = id;
 119         v4l2_video_std_frame_period(id, &vs->frameperiod);
 120         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 121         strlcpy(vs->name, name, sizeof(vs->name));
 122         return 0;
 123 }
 124 EXPORT_SYMBOL(v4l2_video_std_construct);
 125
 126 /* ----------------------------------------------------------------- */
 127 /* some arrays for pretty-printing debug messages of enum types      */
 128
 129 const char *v4l2_field_names[] = {
 130         [V4L2_FIELD_ANY]        = "any",
 131         [V4L2_FIELD_NONE]       = "none",
 132         [V4L2_FIELD_TOP]        = "top",
 133         [V4L2_FIELD_BOTTOM]     = "bottom",
 134         [V4L2_FIELD_INTERLACED] = "interlaced",
 135         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 136         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 137         [V4L2_FIELD_ALTERNATE]  = "alternate",
 138         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 139         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 140 };
 141 EXPORT_SYMBOL(v4l2_field_names);
 142
 143 const char *v4l2_type_names[] = {
 144         [0]                                = "0",
 145         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 146         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 147         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 148         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 149         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 150         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 151         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 153         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 154         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 155         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 156 };
 157 EXPORT_SYMBOL(v4l2_type_names);
 158
 159 static const char *v4l2_memory_names[] = {
 160         [V4L2_MEMORY_MMAP]    = "mmap",
 161         [V4L2_MEMORY_USERPTR] = "userptr",
 162         [V4L2_MEMORY_OVERLAY] = "overlay",
 163         [V4L2_MEMORY_DMABUF] = "dmabuf",
 164 };
 165
 166 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 167
 168 /* ------------------------------------------------------------------ */
 169 /* debug help functions                                               */
 170
 171 static void v4l_print_querycap(const void *arg, bool write_only)
 172 {
 173         const struct v4l2_capability *p = arg;
 174
 175         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 176                 "capabilities=0x%08x, device_caps=0x%08x\n",
 177                 (int)sizeof(p->driver), p->driver,
 178                 (int)sizeof(p->card), p->card,
 179                 (int)sizeof(p->bus_info), p->bus_info,
 180                 p->version, p->capabilities, p->device_caps);
 181 }
 182
 183 static void v4l_print_enuminput(const void *arg, bool write_only)
 184 {
 185         const struct v4l2_input *p = arg;
 186
 187         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 188                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 189                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 190                 p->tuner, (unsigned long long)p->std, p->status,
 191                 p->capabilities);
 192 }
 193
 194 static void v4l_print_enumoutput(const void *arg, bool write_only)
 195 {
 196         const struct v4l2_output *p = arg;
 197
 198         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 199                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 200                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 201                 p->modulator, (unsigned long long)p->std, p->capabilities);
 202 }
 203
 204 static void v4l_print_audio(const void *arg, bool write_only)
 205 {
 206         const struct v4l2_audio *p = arg;
 207
 208         if (write_only)
 209                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 210         else
 211                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 212                         p->index, (int)sizeof(p->name), p->name,
 213                         p->capability, p->mode);
 214 }
 215
 216 static void v4l_print_audioout(const void *arg, bool write_only)
 217 {
 218         const struct v4l2_audioout *p = arg;
 219
 220         if (write_only)
 221                 pr_cont("index=%u\n", p->index);
 222         else
 223                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 224                         p->index, (int)sizeof(p->name), p->name,
 225                         p->capability, p->mode);
 226 }
 227
 228 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 229 {
 230         const struct v4l2_fmtdesc *p = arg;
 231
 232         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 233                 p->index, prt_names(p->type, v4l2_type_names),
 234                 p->flags, (p->pixelformat & 0xff),
 235                 (p->pixelformat >>  8) & 0xff,
 236                 (p->pixelformat >> 16) & 0xff,
 237                 (p->pixelformat >> 24) & 0xff,
 238                 (int)sizeof(p->description), p->description);
 239 }
 240
 241 static void v4l_print_format(const void *arg, bool write_only)
 242 {
 243         const struct v4l2_format *p = arg;
 244         const struct v4l2_pix_format *pix;
 245         const struct v4l2_pix_format_mplane *mp;
 246         const struct v4l2_vbi_format *vbi;
 247         const struct v4l2_sliced_vbi_format *sliced;
 248         const struct v4l2_window *win;
 249         const struct v4l2_sdr_format *sdr;
 250         unsigned i;
 251
 252         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 253         switch (p->type) {
 254         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 255         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 256                 pix = &p->fmt.pix;
 257                 pr_cont(", width=%u, height=%u, "
 258                         "pixelformat=%c%c%c%c, field=%s, "
 259                         "bytesperline=%u, sizeimage=%u, colorspace=%d, "
 260                         "flags=0x%x, ycbcr_enc=%u, quantization=%u, "
 261                         "xfer_func=%u\n",
 262                         pix->width, pix->height,
 263                         (pix->pixelformat & 0xff),
 264                         (pix->pixelformat >>  8) & 0xff,
 265                         (pix->pixelformat >> 16) & 0xff,
 266                         (pix->pixelformat >> 24) & 0xff,
 267                         prt_names(pix->field, v4l2_field_names),
 268                         pix->bytesperline, pix->sizeimage,
 269                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 270                         pix->quantization, pix->xfer_func);
 271                 break;
 272         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 273         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 274                 mp = &p->fmt.pix_mp;
 275                 pr_cont(", width=%u, height=%u, "
 276                         "format=%c%c%c%c, field=%s, "
 277                         "colorspace=%d, num_planes=%u, flags=0x%x, "
 278                         "ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 279                         mp->width, mp->height,
 280                         (mp->pixelformat & 0xff),
 281                         (mp->pixelformat >>  8) & 0xff,
 282                         (mp->pixelformat >> 16) & 0xff,
 283                         (mp->pixelformat >> 24) & 0xff,
 284                         prt_names(mp->field, v4l2_field_names),
 285                         mp->colorspace, mp->num_planes, mp->flags,
 286                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 287                 for (i = 0; i < mp->num_planes; i++)
 288                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 289                                         mp->plane_fmt[i].bytesperline,
 290                                         mp->plane_fmt[i].sizeimage);
 291                 break;
 292         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 293         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 294                 win = &p->fmt.win;
 295                 /* Note: we can't print the clip list here since the clips
 296                  * pointer is a userspace pointer, not a kernelspace
 297                  * pointer. */
 298                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 299                         win->w.width, win->w.height, win->w.left, win->w.top,
 300                         prt_names(win->field, v4l2_field_names),
 301                         win->chromakey, win->clipcount, win->clips,
 302                         win->bitmap, win->global_alpha);
 303                 break;
 304         case V4L2_BUF_TYPE_VBI_CAPTURE:
 305         case V4L2_BUF_TYPE_VBI_OUTPUT:
 306                 vbi = &p->fmt.vbi;
 307                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 308                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 309                         vbi->sampling_rate, vbi->offset,
 310                         vbi->samples_per_line,
 311                         (vbi->sample_format & 0xff),
 312                         (vbi->sample_format >>  8) & 0xff,
 313                         (vbi->sample_format >> 16) & 0xff,
 314                         (vbi->sample_format >> 24) & 0xff,
 315                         vbi->start[0], vbi->start[1],
 316                         vbi->count[0], vbi->count[1]);
 317                 break;
 318         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 319         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 320                 sliced = &p->fmt.sliced;
 321                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 322                                 sliced->service_set, sliced->io_size);
 323                 for (i = 0; i < 24; i++)
 324                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 325                                 sliced->service_lines[0][i],
 326                                 sliced->service_lines[1][i]);
 327                 break;
 328         case V4L2_BUF_TYPE_SDR_CAPTURE:
 329                 sdr = &p->fmt.sdr;
 330                 pr_cont(", pixelformat=%c%c%c%c\n",
 331                         (sdr->pixelformat >>  0) & 0xff,
 332                         (sdr->pixelformat >>  8) & 0xff,
 333                         (sdr->pixelformat >> 16) & 0xff,
 334                         (sdr->pixelformat >> 24) & 0xff);
 335                 break;
 336         }
 337 }
 338
 339 static void v4l_print_framebuffer(const void *arg, bool write_only)
 340 {
 341         const struct v4l2_framebuffer *p = arg;
 342
 343         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 344                 "height=%u, pixelformat=%c%c%c%c, "
 345                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 346                         p->capability, p->flags, p->base,
 347                         p->fmt.width, p->fmt.height,
 348                         (p->fmt.pixelformat & 0xff),
 349                         (p->fmt.pixelformat >>  8) & 0xff,
 350                         (p->fmt.pixelformat >> 16) & 0xff,
 351                         (p->fmt.pixelformat >> 24) & 0xff,
 352                         p->fmt.bytesperline, p->fmt.sizeimage,
 353                         p->fmt.colorspace);
 354 }
 355
 356 static void v4l_print_buftype(const void *arg, bool write_only)
 357 {
 358         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 359 }
 360
 361 static void v4l_print_modulator(const void *arg, bool write_only)
 362 {
 363         const struct v4l2_modulator *p = arg;
 364
 365         if (write_only)
 366                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 367         else
 368                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 369                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 370                         p->index, (int)sizeof(p->name), p->name, p->capability,
 371                         p->rangelow, p->rangehigh, p->txsubchans);
 372 }
 373
 374 static void v4l_print_tuner(const void *arg, bool write_only)
 375 {
 376         const struct v4l2_tuner *p = arg;
 377
 378         if (write_only)
 379                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 380         else
 381                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 382                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 383                         "rxsubchans=0x%x, audmode=%u\n",
 384                         p->index, (int)sizeof(p->name), p->name, p->type,
 385                         p->capability, p->rangelow,
 386                         p->rangehigh, p->signal, p->afc,
 387                         p->rxsubchans, p->audmode);
 388 }
 389
 390 static void v4l_print_frequency(const void *arg, bool write_only)
 391 {
 392         const struct v4l2_frequency *p = arg;
 393
 394         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 395                                 p->tuner, p->type, p->frequency);
 396 }
 397
 398 static void v4l_print_standard(const void *arg, bool write_only)
 399 {
 400         const struct v4l2_standard *p = arg;
 401
 402         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 403                 "framelines=%u\n", p->index,
 404                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 405                 p->frameperiod.numerator,
 406                 p->frameperiod.denominator,
 407                 p->framelines);
 408 }
 409
 410 static void v4l_print_std(const void *arg, bool write_only)
 411 {
 412         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 413 }
 414
 415 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 416 {
 417         const struct v4l2_hw_freq_seek *p = arg;
 418
 419         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 420                 "rangelow=%u, rangehigh=%u\n",
 421                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 422                 p->rangelow, p->rangehigh);
 423 }
 424
 425 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 426 {
 427         const struct v4l2_requestbuffers *p = arg;
 428
 429         pr_cont("count=%d, type=%s, memory=%s\n",
 430                 p->count,
 431                 prt_names(p->type, v4l2_type_names),
 432                 prt_names(p->memory, v4l2_memory_names));
 433 }
 434
 435 static void v4l_print_buffer(const void *arg, bool write_only)
 436 {
 437         const struct v4l2_buffer *p = arg;
 438         const struct v4l2_timecode *tc = &p->timecode;
 439         const struct v4l2_plane *plane;
 440         int i;
 441
 442         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 443                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 444                         p->timestamp.tv_sec / 3600,
 445                         (int)(p->timestamp.tv_sec / 60) % 60,
 446                         (int)(p->timestamp.tv_sec % 60),
 447                         (long)p->timestamp.tv_usec,
 448                         p->index,
 449                         prt_names(p->type, v4l2_type_names),
 450                         p->flags, prt_names(p->field, v4l2_field_names),
 451                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 452
 453         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 454                 pr_cont("\n");
 455                 for (i = 0; i < p->length; ++i) {
 456                         plane = &p->m.planes[i];
 457                         printk(KERN_DEBUG
 458                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 459                                 "offset/userptr=0x%lx, length=%d\n",
 460                                 i, plane->bytesused, plane->data_offset,
 461                                 plane->m.userptr, plane->length);
 462                 }
 463         } else {
 464                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 465                         p->bytesused, p->m.userptr, p->length);
 466         }
 467
 468         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 469                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 470                         tc->hours, tc->minutes, tc->seconds,
 471                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 472 }
 473
 474 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 475 {
 476         const struct v4l2_exportbuffer *p = arg;
 477
 478         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 479                 p->fd, prt_names(p->type, v4l2_type_names),
 480                 p->index, p->plane, p->flags);
 481 }
 482
 483 static void v4l_print_create_buffers(const void *arg, bool write_only)
 484 {
 485         const struct v4l2_create_buffers *p = arg;
 486
 487         pr_cont("index=%d, count=%d, memory=%s, ",
 488                         p->index, p->count,
 489                         prt_names(p->memory, v4l2_memory_names));
 490         v4l_print_format(&p->format, write_only);
 491 }
 492
 493 static void v4l_print_streamparm(const void *arg, bool write_only)
 494 {
 495         const struct v4l2_streamparm *p = arg;
 496
 497         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 498
 499         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 500             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 501                 const struct v4l2_captureparm *c = &p->parm.capture;
 502
 503                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 504                         "extendedmode=%d, readbuffers=%d\n",
 505                         c->capability, c->capturemode,
 506                         c->timeperframe.numerator, c->timeperframe.denominator,
 507                         c->extendedmode, c->readbuffers);
 508         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 509                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 510                 const struct v4l2_outputparm *c = &p->parm.output;
 511
 512                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 513                         "extendedmode=%d, writebuffers=%d\n",
 514                         c->capability, c->outputmode,
 515                         c->timeperframe.numerator, c->timeperframe.denominator,
 516                         c->extendedmode, c->writebuffers);
 517         } else {
 518                 pr_cont("\n");
 519         }
 520 }
 521
 522 static void v4l_print_queryctrl(const void *arg, bool write_only)
 523 {
 524         const struct v4l2_queryctrl *p = arg;
 525
 526         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 527                 "step=%d, default=%d, flags=0x%08x\n",
 528                         p->id, p->type, (int)sizeof(p->name), p->name,
 529                         p->minimum, p->maximum,
 530                         p->step, p->default_value, p->flags);
 531 }
 532
 533 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 534 {
 535         const struct v4l2_query_ext_ctrl *p = arg;
 536
 537         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
 538                 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
 539                 "nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 540                         p->id, p->type, (int)sizeof(p->name), p->name,
 541                         p->minimum, p->maximum,
 542                         p->step, p->default_value, p->flags,
 543                         p->elem_size, p->elems, p->nr_of_dims,
 544                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 545 }
 546
 547 static void v4l_print_querymenu(const void *arg, bool write_only)
 548 {
 549         const struct v4l2_querymenu *p = arg;
 550
 551         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 552 }
 553
 554 static void v4l_print_control(const void *arg, bool write_only)
 555 {
 556         const struct v4l2_control *p = arg;
 557
 558         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 559 }
 560
 561 static void v4l_print_ext_controls(const void *arg, bool write_only)
 562 {
 563         const struct v4l2_ext_controls *p = arg;
 564         int i;
 565
 566         pr_cont("class=0x%x, count=%d, error_idx=%d",
 567                         p->ctrl_class, p->count, p->error_idx);
 568         for (i = 0; i < p->count; i++) {
 569                 if (!p->controls[i].size)
 570                         pr_cont(", id/val=0x%x/0x%x",
 571                                 p->controls[i].id, p->controls[i].value);
 572                 else
 573                         pr_cont(", id/size=0x%x/%u",
 574                                 p->controls[i].id, p->controls[i].size);
 575         }
 576         pr_cont("\n");
 577 }
 578
 579 static void v4l_print_cropcap(const void *arg, bool write_only)
 580 {
 581         const struct v4l2_cropcap *p = arg;
 582
 583         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 584                 "defrect wxh=%dx%d, x,y=%d,%d, "
 585                 "pixelaspect %d/%d\n",
 586                 prt_names(p->type, v4l2_type_names),
 587                 p->bounds.width, p->bounds.height,
 588                 p->bounds.left, p->bounds.top,
 589                 p->defrect.width, p->defrect.height,
 590                 p->defrect.left, p->defrect.top,
 591                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 592 }
 593
 594 static void v4l_print_crop(const void *arg, bool write_only)
 595 {
 596         const struct v4l2_crop *p = arg;
 597
 598         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 599                 prt_names(p->type, v4l2_type_names),
 600                 p->c.width, p->c.height,
 601                 p->c.left, p->c.top);
 602 }
 603
 604 static void v4l_print_selection(const void *arg, bool write_only)
 605 {
 606         const struct v4l2_selection *p = arg;
 607
 608         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 609                 prt_names(p->type, v4l2_type_names),
 610                 p->target, p->flags,
 611                 p->r.width, p->r.height, p->r.left, p->r.top);
 612 }
 613
 614 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 615 {
 616         const struct v4l2_jpegcompression *p = arg;
 617
 618         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 619                 "COM_len=%d, jpeg_markers=0x%x\n",
 620                 p->quality, p->APPn, p->APP_len,
 621                 p->COM_len, p->jpeg_markers);
 622 }
 623
 624 static void v4l_print_enc_idx(const void *arg, bool write_only)
 625 {
 626         const struct v4l2_enc_idx *p = arg;
 627
 628         pr_cont("entries=%d, entries_cap=%d\n",
 629                         p->entries, p->entries_cap);
 630 }
 631
 632 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 633 {
 634         const struct v4l2_encoder_cmd *p = arg;
 635
 636         pr_cont("cmd=%d, flags=0x%x\n",
 637                         p->cmd, p->flags);
 638 }
 639
 640 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 641 {
 642         const struct v4l2_decoder_cmd *p = arg;
 643
 644         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 645
 646         if (p->cmd == V4L2_DEC_CMD_START)
 647                 pr_info("speed=%d, format=%u\n",
 648                                 p->start.speed, p->start.format);
 649         else if (p->cmd == V4L2_DEC_CMD_STOP)
 650                 pr_info("pts=%llu\n", p->stop.pts);
 651 }
 652
 653 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 654 {
 655         const struct v4l2_dbg_chip_info *p = arg;
 656
 657         pr_cont("type=%u, ", p->match.type);
 658         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 659                 pr_cont("name=%.*s, ",
 660                                 (int)sizeof(p->match.name), p->match.name);
 661         else
 662                 pr_cont("addr=%u, ", p->match.addr);
 663         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 664 }
 665
 666 static void v4l_print_dbg_register(const void *arg, bool write_only)
 667 {
 668         const struct v4l2_dbg_register *p = arg;
 669
 670         pr_cont("type=%u, ", p->match.type);
 671         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 672                 pr_cont("name=%.*s, ",
 673                                 (int)sizeof(p->match.name), p->match.name);
 674         else
 675                 pr_cont("addr=%u, ", p->match.addr);
 676         pr_cont("reg=0x%llx, val=0x%llx\n",
 677                         p->reg, p->val);
 678 }
 679
 680 static void v4l_print_dv_timings(const void *arg, bool write_only)
 681 {
 682         const struct v4l2_dv_timings *p = arg;
 683
 684         switch (p->type) {
 685         case V4L2_DV_BT_656_1120:
 686                 pr_cont("type=bt-656/1120, interlaced=%u, "
 687                         "pixelclock=%llu, "
 688                         "width=%u, height=%u, polarities=0x%x, "
 689                         "hfrontporch=%u, hsync=%u, "
 690                         "hbackporch=%u, vfrontporch=%u, "
 691                         "vsync=%u, vbackporch=%u, "
 692                         "il_vfrontporch=%u, il_vsync=%u, "
 693                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 694                                 p->bt.interlaced, p->bt.pixelclock,
 695                                 p->bt.width, p->bt.height,
 696                                 p->bt.polarities, p->bt.hfrontporch,
 697                                 p->bt.hsync, p->bt.hbackporch,
 698                                 p->bt.vfrontporch, p->bt.vsync,
 699                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 700                                 p->bt.il_vsync, p->bt.il_vbackporch,
 701                                 p->bt.standards, p->bt.flags);
 702                 break;
 703         default:
 704                 pr_cont("type=%d\n", p->type);
 705                 break;
 706         }
 707 }
 708
 709 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 710 {
 711         const struct v4l2_enum_dv_timings *p = arg;
 712
 713         pr_cont("index=%u, ", p->index);
 714         v4l_print_dv_timings(&p->timings, write_only);
 715 }
 716
 717 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 718 {
 719         const struct v4l2_dv_timings_cap *p = arg;
 720
 721         switch (p->type) {
 722         case V4L2_DV_BT_656_1120:
 723                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 724                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 725                         p->bt.min_width, p->bt.max_width,
 726                         p->bt.min_height, p->bt.max_height,
 727                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 728                         p->bt.standards, p->bt.capabilities);
 729                 break;
 730         default:
 731                 pr_cont("type=%u\n", p->type);
 732                 break;
 733         }
 734 }
 735
 736 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 737 {
 738         const struct v4l2_frmsizeenum *p = arg;
 739
 740         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 741                         p->index,
 742                         (p->pixel_format & 0xff),
 743                         (p->pixel_format >>  8) & 0xff,
 744                         (p->pixel_format >> 16) & 0xff,
 745                         (p->pixel_format >> 24) & 0xff,
 746                         p->type);
 747         switch (p->type) {
 748         case V4L2_FRMSIZE_TYPE_DISCRETE:
 749                 pr_cont(", wxh=%ux%u\n",
 750                         p->discrete.width, p->discrete.height);
 751                 break;
 752         case V4L2_FRMSIZE_TYPE_STEPWISE:
 753                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 754                                 p->stepwise.min_width,  p->stepwise.min_height,
 755                                 p->stepwise.step_width, p->stepwise.step_height,
 756                                 p->stepwise.max_width,  p->stepwise.max_height);
 757                 break;
 758         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 759                 /* fall through */
 760         default:
 761                 pr_cont("\n");
 762                 break;
 763         }
 764 }
 765
 766 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 767 {
 768         const struct v4l2_frmivalenum *p = arg;
 769
 770         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 771                         p->index,
 772                         (p->pixel_format & 0xff),
 773                         (p->pixel_format >>  8) & 0xff,
 774                         (p->pixel_format >> 16) & 0xff,
 775                         (p->pixel_format >> 24) & 0xff,
 776                         p->width, p->height, p->type);
 777         switch (p->type) {
 778         case V4L2_FRMIVAL_TYPE_DISCRETE:
 779                 pr_cont(", fps=%d/%d\n",
 780                                 p->discrete.numerator,
 781                                 p->discrete.denominator);
 782                 break;
 783         case V4L2_FRMIVAL_TYPE_STEPWISE:
 784                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 785                                 p->stepwise.min.numerator,
 786                                 p->stepwise.min.denominator,
 787                                 p->stepwise.max.numerator,
 788                                 p->stepwise.max.denominator,
 789                                 p->stepwise.step.numerator,
 790                                 p->stepwise.step.denominator);
 791                 break;
 792         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 793                 /* fall through */
 794         default:
 795                 pr_cont("\n");
 796                 break;
 797         }
 798 }
 799
 800 static void v4l_print_event(const void *arg, bool write_only)
 801 {
 802         const struct v4l2_event *p = arg;
 803         const struct v4l2_event_ctrl *c;
 804
 805         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 806                 "timestamp=%lu.%9.9lu\n",
 807                         p->type, p->pending, p->sequence, p->id,
 808                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 809         switch (p->type) {
 810         case V4L2_EVENT_VSYNC:
 811                 printk(KERN_DEBUG "field=%s\n",
 812                         prt_names(p->u.vsync.field, v4l2_field_names));
 813                 break;
 814         case V4L2_EVENT_CTRL:
 815                 c = &p->u.ctrl;
 816                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 817                         c->changes, c->type);
 818                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 819                         pr_cont("value64=%lld, ", c->value64);
 820                 else
 821                         pr_cont("value=%d, ", c->value);
 822                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 823                         "default_value=%d\n",
 824                         c->flags, c->minimum, c->maximum,
 825                         c->step, c->default_value);
 826                 break;
 827         case V4L2_EVENT_FRAME_SYNC:
 828                 pr_cont("frame_sequence=%u\n",
 829                         p->u.frame_sync.frame_sequence);
 830                 break;
 831         }
 832 }
 833
 834 static void v4l_print_event_subscription(const void *arg, bool write_only)
 835 {
 836         const struct v4l2_event_subscription *p = arg;
 837
 838         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 839                         p->type, p->id, p->flags);
 840 }
 841
 842 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 843 {
 844         const struct v4l2_sliced_vbi_cap *p = arg;
 845         int i;
 846
 847         pr_cont("type=%s, service_set=0x%08x\n",
 848                         prt_names(p->type, v4l2_type_names), p->service_set);
 849         for (i = 0; i < 24; i++)
 850                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 851                                 p->service_lines[0][i],
 852                                 p->service_lines[1][i]);
 853 }
 854
 855 static void v4l_print_freq_band(const void *arg, bool write_only)
 856 {
 857         const struct v4l2_frequency_band *p = arg;
 858
 859         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 860                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 861                         p->tuner, p->type, p->index,
 862                         p->capability, p->rangelow,
 863                         p->rangehigh, p->modulation);
 864 }
 865
 866 static void v4l_print_edid(const void *arg, bool write_only)
 867 {
 868         const struct v4l2_edid *p = arg;
 869
 870         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 871                 p->pad, p->start_block, p->blocks);
 872 }
 873
 874 static void v4l_print_u32(const void *arg, bool write_only)
 875 {
 876         pr_cont("value=%u\n", *(const u32 *)arg);
 877 }
 878
 879 static void v4l_print_newline(const void *arg, bool write_only)
 880 {
 881         pr_cont("\n");
 882 }
 883
 884 static void v4l_print_default(const void *arg, bool write_only)
 885 {
 886         pr_cont("driver-specific ioctl\n");
 887 }
 888
 889 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 890 {
 891         __u32 i;
 892
 893         /* zero the reserved fields */
 894         c->reserved[0] = c->reserved[1] = 0;
 895         for (i = 0; i < c->count; i++)
 896                 c->controls[i].reserved2[0] = 0;
 897
 898         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 899            when using extended controls.
 900            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 901            is it allowed for backwards compatibility.
 902          */
 903         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 904                 return 0;
 905         if (c->ctrl_class == 0)
 906                 return 1;
 907         /* Check that all controls are from the same control class. */
 908         for (i = 0; i < c->count; i++) {
 909                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 910                         c->error_idx = i;
 911                         return 0;
 912                 }
 913         }
 914         return 1;
 915 }
 916
 917 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 918 {
 919         struct video_device *vfd = video_devdata(file);
 920         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 921         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 922         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 923         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 924         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 925         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 926
 927         if (ops == NULL)
 928                 return -EINVAL;
 929
 930         switch (type) {
 931         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 932                 if (is_vid && is_rx &&
 933                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 934                         return 0;
 935                 break;
 936         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 937                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 938                         return 0;
 939                 break;
 940         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 941                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 942                         return 0;
 943                 break;
 944         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 945                 if (is_vid && is_tx &&
 946                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 950                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 954                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_VBI_CAPTURE:
 958                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_VBI_OUTPUT:
 962                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 963                         return 0;
 964                 break;
 965         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 966                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 967                         return 0;
 968                 break;
 969         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 970                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 971                         return 0;
 972                 break;
 973         case V4L2_BUF_TYPE_SDR_CAPTURE:
 974                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 975                         return 0;
 976                 break;
 977         default:
 978                 break;
 979         }
 980         return -EINVAL;
 981 }
 982
 983 static void v4l_sanitize_format(struct v4l2_format *fmt)
 984 {
 985         unsigned int offset;
 986
 987         /*
 988          * The v4l2_pix_format structure has been extended with fields that were
 989          * not previously required to be set to zero by applications. The priv
 990          * field, when set to a magic value, indicates the the extended fields
 991          * are valid. Otherwise they will contain undefined values. To simplify
 992          * the API towards drivers zero the extended fields and set the priv
 993          * field to the magic value when the extended pixel format structure
 994          * isn't used by applications.
 995          */
 996
 997         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 998             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 999                 return;
1000
1001         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1002                 return;
1003
1004         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1005
1006         offset = offsetof(struct v4l2_pix_format, priv)
1007                + sizeof(fmt->fmt.pix.priv);
1008         memset(((void *)&fmt->fmt.pix) + offset, 0,
1009                sizeof(fmt->fmt.pix) - offset);
1010 }
1011
1012 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1013                                 struct file *file, void *fh, void *arg)
1014 {
1015         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1016         int ret;
1017
1018         cap->version = LINUX_VERSION_CODE;
1019
1020         ret = ops->vidioc_querycap(file, fh, cap);
1021
1022         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1023         /*
1024          * Drivers MUST fill in device_caps, so check for this and
1025          * warn if it was forgotten.
1026          */
1027         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1028                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1029                 cap->driver, cap->capabilities, cap->device_caps);
1030         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1031
1032         return ret;
1033 }
1034
1035 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1036                                 struct file *file, void *fh, void *arg)
1037 {
1038         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1039 }
1040
1041 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1042                                 struct file *file, void *fh, void *arg)
1043 {
1044         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1045 }
1046
1047 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1048                                 struct file *file, void *fh, void *arg)
1049 {
1050         struct video_device *vfd;
1051         u32 *p = arg;
1052
1053         vfd = video_devdata(file);
1054         *p = v4l2_prio_max(vfd->prio);
1055         return 0;
1056 }
1057
1058 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1059                                 struct file *file, void *fh, void *arg)
1060 {
1061         struct video_device *vfd;
1062         struct v4l2_fh *vfh;
1063         u32 *p = arg;
1064
1065         vfd = video_devdata(file);
1066         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1067                 return -ENOTTY;
1068         vfh = file->private_data;
1069         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1070 }
1071
1072 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1073                                 struct file *file, void *fh, void *arg)
1074 {
1075         struct video_device *vfd = video_devdata(file);
1076         struct v4l2_input *p = arg;
1077
1078         /*
1079          * We set the flags for CAP_DV_TIMINGS &
1080          * CAP_STD here based on ioctl handler provided by the
1081          * driver. If the driver doesn't support these
1082          * for a specific input, it must override these flags.
1083          */
1084         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1085                 p->capabilities |= V4L2_IN_CAP_STD;
1086
1087         return ops->vidioc_enum_input(file, fh, p);
1088 }
1089
1090 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1091                                 struct file *file, void *fh, void *arg)
1092 {
1093         struct video_device *vfd = video_devdata(file);
1094         struct v4l2_output *p = arg;
1095
1096         /*
1097          * We set the flags for CAP_DV_TIMINGS &
1098          * CAP_STD here based on ioctl handler provided by the
1099          * driver. If the driver doesn't support these
1100          * for a specific output, it must override these flags.
1101          */
1102         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1103                 p->capabilities |= V4L2_OUT_CAP_STD;
1104
1105         return ops->vidioc_enum_output(file, fh, p);
1106 }
1107
1108 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1109 {
1110         const unsigned sz = sizeof(fmt->description);
1111         const char *descr = NULL;
1112         u32 flags = 0;
1113
1114         /*
1115          * We depart from the normal coding style here since the descriptions
1116          * should be aligned so it is easy to see which descriptions will be
1117          * longer than 31 characters (the max length for a description).
1118          * And frankly, this is easier to read anyway.
1119          *
1120          * Note that gcc will use O(log N) comparisons to find the right case.
1121          */
1122         switch (fmt->pixelformat) {
1123         /* Max description length mask: descr = "0123456789012345678901234567890" */
1124         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1125         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1126         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1127         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1128         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1129         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1130         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1131         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1132         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1133         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1134         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1135         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1136         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1137         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1138         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1139         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1140         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1141         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1142         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1143         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1144         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1145         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1146         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1147         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1148         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1149         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1150         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1151         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1152         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1153         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1154         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1155         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1156         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1157         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1158         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1159         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1160         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1161         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1162         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YVU 4:2:2"; break;
1163         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1164         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1165         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1166         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1167         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1168         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1169         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1170         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1171         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1172         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1173         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1174         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1175         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1176         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1177         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1178         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1179         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1180         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1181         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1182         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1183         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1184         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1185         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1186         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1187         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1188         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1189         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1190         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1191         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1192         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1193         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1194         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1195         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1196         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1197         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1198         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1199         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1200         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1201         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1202         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1203         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1204         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1205         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1206         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1207         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1208         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1209         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1210         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1211         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1212         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
1213         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1214         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1215         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1216         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1217         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1218         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1219         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1220         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1221         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1222         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1223         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1224         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1225         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1226
1227         default:
1228                 /* Compressed formats */
1229                 flags = V4L2_FMT_FLAG_COMPRESSED;
1230                 switch (fmt->pixelformat) {
1231                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1232                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1233                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1234                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1235                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1236                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1237                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1238                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1239                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1240                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1241                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1242                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1243                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1244                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1245                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1246                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1247                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1248                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1249                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1250                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1251                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1252                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1253                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1254                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1255                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1256                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1257                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1258                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1259                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1260                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1261                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1262                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1263                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1264                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1265                 default:
1266                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1267                         if (fmt->description[0])
1268                                 return;
1269                         flags = 0;
1270                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1271                                         (char)(fmt->pixelformat & 0x7f),
1272                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1273                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1274                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1275                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1276                         break;
1277                 }
1278         }
1279
1280         if (descr)
1281                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1282         fmt->flags = flags;
1283 }
1284
1285 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1286                                 struct file *file, void *fh, void *arg)
1287 {
1288         struct v4l2_fmtdesc *p = arg;
1289         struct video_device *vfd = video_devdata(file);
1290         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1291         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1292         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1293         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1294         int ret = -EINVAL;
1295
1296         switch (p->type) {
1297         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1298                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1299                         break;
1300                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1301                 break;
1302         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1303                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1304                         break;
1305                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1306                 break;
1307         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1308                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1309                         break;
1310                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1311                 break;
1312         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1313                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1314                         break;
1315                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1316                 break;
1317         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1318                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1319                         break;
1320                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1321                 break;
1322         case V4L2_BUF_TYPE_SDR_CAPTURE:
1323                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1324                         break;
1325                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1326                 break;
1327         }
1328         if (ret == 0)
1329                 v4l_fill_fmtdesc(p);
1330         return ret;
1331 }
1332
1333 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1334                                 struct file *file, void *fh, void *arg)
1335 {
1336         struct v4l2_format *p = arg;
1337         struct video_device *vfd = video_devdata(file);
1338         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1339         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1340         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1341         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1342         int ret;
1343
1344         /*
1345          * fmt can't be cleared for these overlay types due to the 'clips'
1346          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1347          * Those are provided by the user. So handle these two overlay types
1348          * first, and then just do a simple memset for the other types.
1349          */
1350         switch (p->type) {
1351         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1352         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1353                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1354                 u32 clipcount = p->fmt.win.clipcount;
1355                 void __user *bitmap = p->fmt.win.bitmap;
1356
1357                 memset(&p->fmt, 0, sizeof(p->fmt));
1358                 p->fmt.win.clips = clips;
1359                 p->fmt.win.clipcount = clipcount;
1360                 p->fmt.win.bitmap = bitmap;
1361                 break;
1362         }
1363         default:
1364                 memset(&p->fmt, 0, sizeof(p->fmt));
1365                 break;
1366         }
1367
1368         switch (p->type) {
1369         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1370                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1371                         break;
1372                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1373                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1374                 /* just in case the driver zeroed it again */
1375                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1376                 return ret;
1377         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1378                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1379                         break;
1380                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1381         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1382                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1383                         break;
1384                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1385         case V4L2_BUF_TYPE_VBI_CAPTURE:
1386                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1387                         break;
1388                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1389         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1390                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1391                         break;
1392                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1393         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1394                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1395                         break;
1396                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1397                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1398                 /* just in case the driver zeroed it again */
1399                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1400                 return ret;
1401         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1402                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1403                         break;
1404                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1405         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1406                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1407                         break;
1408                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1409         case V4L2_BUF_TYPE_VBI_OUTPUT:
1410                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1411                         break;
1412                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1413         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1414                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1415                         break;
1416                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1417         case V4L2_BUF_TYPE_SDR_CAPTURE:
1418                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1419                         break;
1420                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1421         }
1422         return -EINVAL;
1423 }
1424
1425 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1426                                 struct file *file, void *fh, void *arg)
1427 {
1428         struct v4l2_format *p = arg;
1429         struct video_device *vfd = video_devdata(file);
1430         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1431         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1432         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1433         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1434         int ret;
1435
1436         v4l_sanitize_format(p);
1437
1438         switch (p->type) {
1439         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1440                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1441                         break;
1442                 CLEAR_AFTER_FIELD(p, fmt.pix);
1443                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1444                 /* just in case the driver zeroed it again */
1445                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1446                 return ret;
1447         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1448                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1449                         break;
1450                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1451                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1452         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1453                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1454                         break;
1455                 CLEAR_AFTER_FIELD(p, fmt.win);
1456                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1457         case V4L2_BUF_TYPE_VBI_CAPTURE:
1458                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1459                         break;
1460                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1461                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1462         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1463                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1464                         break;
1465                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1466                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1467         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1468                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1469                         break;
1470                 CLEAR_AFTER_FIELD(p, fmt.pix);
1471                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1472                 /* just in case the driver zeroed it again */
1473                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1474                 return ret;
1475         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1476                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1477                         break;
1478                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1479                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1480         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1481                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1482                         break;
1483                 CLEAR_AFTER_FIELD(p, fmt.win);
1484                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1485         case V4L2_BUF_TYPE_VBI_OUTPUT:
1486                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1487                         break;
1488                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1489                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1490         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1491                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1492                         break;
1493                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1494                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1495         case V4L2_BUF_TYPE_SDR_CAPTURE:
1496                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1497                         break;
1498                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1499                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1500         }
1501         return -EINVAL;
1502 }
1503
1504 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1505                                 struct file *file, void *fh, void *arg)
1506 {
1507         struct v4l2_format *p = arg;
1508         struct video_device *vfd = video_devdata(file);
1509         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1510         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1511         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1512         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1513         int ret;
1514
1515         v4l_sanitize_format(p);
1516
1517         switch (p->type) {
1518         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1519                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1520                         break;
1521                 CLEAR_AFTER_FIELD(p, fmt.pix);
1522                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1523                 /* just in case the driver zeroed it again */
1524                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1525                 return ret;
1526         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1527                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1528                         break;
1529                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1530                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1531         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1532                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1533                         break;
1534                 CLEAR_AFTER_FIELD(p, fmt.win);
1535                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1536         case V4L2_BUF_TYPE_VBI_CAPTURE:
1537                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1538                         break;
1539                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1540                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1541         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1542                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1543                         break;
1544                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1545                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1546         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1547                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1548                         break;
1549                 CLEAR_AFTER_FIELD(p, fmt.pix);
1550                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1551                 /* just in case the driver zeroed it again */
1552                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1553                 return ret;
1554         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1555                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1556                         break;
1557                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1558                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1559         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1560                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1561                         break;
1562                 CLEAR_AFTER_FIELD(p, fmt.win);
1563                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1564         case V4L2_BUF_TYPE_VBI_OUTPUT:
1565                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1566                         break;
1567                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1568                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1569         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1570                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1571                         break;
1572                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1573                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1574         case V4L2_BUF_TYPE_SDR_CAPTURE:
1575                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1576                         break;
1577                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1578                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1579         }
1580         return -EINVAL;
1581 }
1582
1583 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1584                                 struct file *file, void *fh, void *arg)
1585 {
1586         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1587 }
1588
1589 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1590                                 struct file *file, void *fh, void *arg)
1591 {
1592         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1593 }
1594
1595 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1596                                 struct file *file, void *fh, void *arg)
1597 {
1598         struct video_device *vfd = video_devdata(file);
1599         struct v4l2_tuner *p = arg;
1600         int err;
1601
1602         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1603                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1604         err = ops->vidioc_g_tuner(file, fh, p);
1605         if (!err)
1606                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1607         return err;
1608 }
1609
1610 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1611                                 struct file *file, void *fh, void *arg)
1612 {
1613         struct video_device *vfd = video_devdata(file);
1614         struct v4l2_tuner *p = arg;
1615
1616         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1617                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1618         return ops->vidioc_s_tuner(file, fh, p);
1619 }
1620
1621 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1622                                 struct file *file, void *fh, void *arg)
1623 {
1624         struct v4l2_modulator *p = arg;
1625         int err;
1626
1627         err = ops->vidioc_g_modulator(file, fh, p);
1628         if (!err)
1629                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1630         return err;
1631 }
1632
1633 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1634                                 struct file *file, void *fh, void *arg)
1635 {
1636         struct video_device *vfd = video_devdata(file);
1637         struct v4l2_frequency *p = arg;
1638
1639         if (vfd->vfl_type == VFL_TYPE_SDR)
1640                 p->type = V4L2_TUNER_ADC;
1641         else
1642                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1643                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1644         return ops->vidioc_g_frequency(file, fh, p);
1645 }
1646
1647 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1648                                 struct file *file, void *fh, void *arg)
1649 {
1650         struct video_device *vfd = video_devdata(file);
1651         const struct v4l2_frequency *p = arg;
1652         enum v4l2_tuner_type type;
1653
1654         if (vfd->vfl_type == VFL_TYPE_SDR) {
1655                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1656                         return -EINVAL;
1657         } else {
1658                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1659                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1660                 if (type != p->type)
1661                         return -EINVAL;
1662         }
1663         return ops->vidioc_s_frequency(file, fh, p);
1664 }
1665
1666 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1667                                 struct file *file, void *fh, void *arg)
1668 {
1669         struct video_device *vfd = video_devdata(file);
1670         struct v4l2_standard *p = arg;
1671         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1672         unsigned int index = p->index, i, j = 0;
1673         const char *descr = "";
1674
1675         /* Return -ENODATA if the tvnorms for the current input
1676            or output is 0, meaning that it doesn't support this API. */
1677         if (id == 0)
1678                 return -ENODATA;
1679
1680         /* Return norm array in a canonical way */
1681         for (i = 0; i <= index && id; i++) {
1682                 /* last std value in the standards array is 0, so this
1683                    while always ends there since (id & 0) == 0. */
1684                 while ((id & standards[j].std) != standards[j].std)
1685                         j++;
1686                 curr_id = standards[j].std;
1687                 descr = standards[j].descr;
1688                 j++;
1689                 if (curr_id == 0)
1690                         break;
1691                 if (curr_id != V4L2_STD_PAL &&
1692                                 curr_id != V4L2_STD_SECAM &&
1693                                 curr_id != V4L2_STD_NTSC)
1694                         id &= ~curr_id;
1695         }
1696         if (i <= index)
1697                 return -EINVAL;
1698
1699         v4l2_video_std_construct(p, curr_id, descr);
1700         return 0;
1701 }
1702
1703 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1704                                 struct file *file, void *fh, void *arg)
1705 {
1706         struct video_device *vfd = video_devdata(file);
1707         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1708
1709         norm = id & vfd->tvnorms;
1710         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1711                 return -EINVAL;
1712
1713         /* Calls the specific handler */
1714         return ops->vidioc_s_std(file, fh, norm);
1715 }
1716
1717 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1718                                 struct file *file, void *fh, void *arg)
1719 {
1720         struct video_device *vfd = video_devdata(file);
1721         v4l2_std_id *p = arg;
1722
1723         /*
1724          * If no signal is detected, then the driver should return
1725          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1726          * any standards that do not apply removed.
1727          *
1728          * This means that tuners, audio and video decoders can join
1729          * their efforts to improve the standards detection.
1730          */
1731         *p = vfd->tvnorms;
1732         return ops->vidioc_querystd(file, fh, arg);
1733 }
1734
1735 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1736                                 struct file *file, void *fh, void *arg)
1737 {
1738         struct video_device *vfd = video_devdata(file);
1739         struct v4l2_hw_freq_seek *p = arg;
1740         enum v4l2_tuner_type type;
1741
1742         /* s_hw_freq_seek is not supported for SDR for now */
1743         if (vfd->vfl_type == VFL_TYPE_SDR)
1744                 return -EINVAL;
1745
1746         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1747                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1748         if (p->type != type)
1749                 return -EINVAL;
1750         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1751 }
1752
1753 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1754                                 struct file *file, void *fh, void *arg)
1755 {
1756         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1757 }
1758
1759 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1760                                 struct file *file, void *fh, void *arg)
1761 {
1762         struct v4l2_requestbuffers *p = arg;
1763         int ret = check_fmt(file, p->type);
1764
1765         if (ret)
1766                 return ret;
1767
1768         CLEAR_AFTER_FIELD(p, memory);
1769
1770         return ops->vidioc_reqbufs(file, fh, p);
1771 }
1772
1773 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1774                                 struct file *file, void *fh, void *arg)
1775 {
1776         struct v4l2_buffer *p = arg;
1777         int ret = check_fmt(file, p->type);
1778
1779         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1780 }
1781
1782 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1783                                 struct file *file, void *fh, void *arg)
1784 {
1785         struct v4l2_buffer *p = arg;
1786         int ret = check_fmt(file, p->type);
1787
1788         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1789 }
1790
1791 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1792                                 struct file *file, void *fh, void *arg)
1793 {
1794         struct v4l2_buffer *p = arg;
1795         int ret = check_fmt(file, p->type);
1796
1797         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1798 }
1799
1800 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1801                                 struct file *file, void *fh, void *arg)
1802 {
1803         struct v4l2_create_buffers *create = arg;
1804         int ret = check_fmt(file, create->format.type);
1805
1806         if (ret)
1807                 return ret;
1808
1809         CLEAR_AFTER_FIELD(create, format);
1810
1811         v4l_sanitize_format(&create->format);
1812
1813         ret = ops->vidioc_create_bufs(file, fh, create);
1814
1815         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1816             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1817                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1818
1819         return ret;
1820 }
1821
1822 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1823                                 struct file *file, void *fh, void *arg)
1824 {
1825         struct v4l2_buffer *b = arg;
1826         int ret = check_fmt(file, b->type);
1827
1828         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1829 }
1830
1831 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1832                                 struct file *file, void *fh, void *arg)
1833 {
1834         struct v4l2_streamparm *p = arg;
1835         v4l2_std_id std;
1836         int ret = check_fmt(file, p->type);
1837
1838         if (ret)
1839                 return ret;
1840         if (ops->vidioc_g_parm)
1841                 return ops->vidioc_g_parm(file, fh, p);
1842         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1843             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1844                 return -EINVAL;
1845         p->parm.capture.readbuffers = 2;
1846         ret = ops->vidioc_g_std(file, fh, &std);
1847         if (ret == 0)
1848                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1849         return ret;
1850 }
1851
1852 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1853                                 struct file *file, void *fh, void *arg)
1854 {
1855         struct v4l2_streamparm *p = arg;
1856         int ret = check_fmt(file, p->type);
1857
1858         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1859 }
1860
1861 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1862                                 struct file *file, void *fh, void *arg)
1863 {
1864         struct video_device *vfd = video_devdata(file);
1865         struct v4l2_queryctrl *p = arg;
1866         struct v4l2_fh *vfh =
1867                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1868
1869         if (vfh && vfh->ctrl_handler)
1870                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1871         if (vfd->ctrl_handler)
1872                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1873         if (ops->vidioc_queryctrl)
1874                 return ops->vidioc_queryctrl(file, fh, p);
1875         return -ENOTTY;
1876 }
1877
1878 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1879                                 struct file *file, void *fh, void *arg)
1880 {
1881         struct video_device *vfd = video_devdata(file);
1882         struct v4l2_query_ext_ctrl *p = arg;
1883         struct v4l2_fh *vfh =
1884                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1885
1886         if (vfh && vfh->ctrl_handler)
1887                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1888         if (vfd->ctrl_handler)
1889                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1890         if (ops->vidioc_query_ext_ctrl)
1891                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1892         return -ENOTTY;
1893 }
1894
1895 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1896                                 struct file *file, void *fh, void *arg)
1897 {
1898         struct video_device *vfd = video_devdata(file);
1899         struct v4l2_querymenu *p = arg;
1900         struct v4l2_fh *vfh =
1901                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1902
1903         if (vfh && vfh->ctrl_handler)
1904                 return v4l2_querymenu(vfh->ctrl_handler, p);
1905         if (vfd->ctrl_handler)
1906                 return v4l2_querymenu(vfd->ctrl_handler, p);
1907         if (ops->vidioc_querymenu)
1908                 return ops->vidioc_querymenu(file, fh, p);
1909         return -ENOTTY;
1910 }
1911
1912 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1913                                 struct file *file, void *fh, void *arg)
1914 {
1915         struct video_device *vfd = video_devdata(file);
1916         struct v4l2_control *p = arg;
1917         struct v4l2_fh *vfh =
1918                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1919         struct v4l2_ext_controls ctrls;
1920         struct v4l2_ext_control ctrl;
1921
1922         if (vfh && vfh->ctrl_handler)
1923                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1924         if (vfd->ctrl_handler)
1925                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1926         if (ops->vidioc_g_ctrl)
1927                 return ops->vidioc_g_ctrl(file, fh, p);
1928         if (ops->vidioc_g_ext_ctrls == NULL)
1929                 return -ENOTTY;
1930
1931         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1932         ctrls.count = 1;
1933         ctrls.controls = &ctrl;
1934         ctrl.id = p->id;
1935         ctrl.value = p->value;
1936         if (check_ext_ctrls(&ctrls, 1)) {
1937                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1938
1939                 if (ret == 0)
1940                         p->value = ctrl.value;
1941                 return ret;
1942         }
1943         return -EINVAL;
1944 }
1945
1946 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1947                                 struct file *file, void *fh, void *arg)
1948 {
1949         struct video_device *vfd = video_devdata(file);
1950         struct v4l2_control *p = arg;
1951         struct v4l2_fh *vfh =
1952                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1953         struct v4l2_ext_controls ctrls;
1954         struct v4l2_ext_control ctrl;
1955
1956         if (vfh && vfh->ctrl_handler)
1957                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1958         if (vfd->ctrl_handler)
1959                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1960         if (ops->vidioc_s_ctrl)
1961                 return ops->vidioc_s_ctrl(file, fh, p);
1962         if (ops->vidioc_s_ext_ctrls == NULL)
1963                 return -ENOTTY;
1964
1965         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1966         ctrls.count = 1;
1967         ctrls.controls = &ctrl;
1968         ctrl.id = p->id;
1969         ctrl.value = p->value;
1970         if (check_ext_ctrls(&ctrls, 1))
1971                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1972         return -EINVAL;
1973 }
1974
1975 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1976                                 struct file *file, void *fh, void *arg)
1977 {
1978         struct video_device *vfd = video_devdata(file);
1979         struct v4l2_ext_controls *p = arg;
1980         struct v4l2_fh *vfh =
1981                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1982
1983         p->error_idx = p->count;
1984         if (vfh && vfh->ctrl_handler)
1985                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1986         if (vfd->ctrl_handler)
1987                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1988         if (ops->vidioc_g_ext_ctrls == NULL)
1989                 return -ENOTTY;
1990         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1991                                         -EINVAL;
1992 }
1993
1994 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1995                                 struct file *file, void *fh, void *arg)
1996 {
1997         struct video_device *vfd = video_devdata(file);
1998         struct v4l2_ext_controls *p = arg;
1999         struct v4l2_fh *vfh =
2000                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2001
2002         p->error_idx = p->count;
2003         if (vfh && vfh->ctrl_handler)
2004                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2005         if (vfd->ctrl_handler)
2006                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2007         if (ops->vidioc_s_ext_ctrls == NULL)
2008                 return -ENOTTY;
2009         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2010                                         -EINVAL;
2011 }
2012
2013 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2014                                 struct file *file, void *fh, void *arg)
2015 {
2016         struct video_device *vfd = video_devdata(file);
2017         struct v4l2_ext_controls *p = arg;
2018         struct v4l2_fh *vfh =
2019                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2020
2021         p->error_idx = p->count;
2022         if (vfh && vfh->ctrl_handler)
2023                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2024         if (vfd->ctrl_handler)
2025                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2026         if (ops->vidioc_try_ext_ctrls == NULL)
2027                 return -ENOTTY;
2028         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2029                                         -EINVAL;
2030 }
2031
2032 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2033                                 struct file *file, void *fh, void *arg)
2034 {
2035         struct v4l2_crop *p = arg;
2036         struct v4l2_selection s = {
2037                 .type = p->type,
2038         };
2039         int ret;
2040
2041         if (ops->vidioc_g_crop)
2042                 return ops->vidioc_g_crop(file, fh, p);
2043         /* simulate capture crop using selection api */
2044
2045         /* crop means compose for output devices */
2046         if (V4L2_TYPE_IS_OUTPUT(p->type))
2047                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2048         else
2049                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2050
2051         ret = ops->vidioc_g_selection(file, fh, &s);
2052
2053         /* copying results to old structure on success */
2054         if (!ret)
2055                 p->c = s.r;
2056         return ret;
2057 }
2058
2059 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2060                                 struct file *file, void *fh, void *arg)
2061 {
2062         struct v4l2_crop *p = arg;
2063         struct v4l2_selection s = {
2064                 .type = p->type,
2065                 .r = p->c,
2066         };
2067
2068         if (ops->vidioc_s_crop)
2069                 return ops->vidioc_s_crop(file, fh, p);
2070         /* simulate capture crop using selection api */
2071
2072         /* crop means compose for output devices */
2073         if (V4L2_TYPE_IS_OUTPUT(p->type))
2074                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2075         else
2076                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2077
2078         return ops->vidioc_s_selection(file, fh, &s);
2079 }
2080
2081 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2082                                 struct file *file, void *fh, void *arg)
2083 {
2084         struct v4l2_cropcap *p = arg;
2085
2086         if (ops->vidioc_g_selection) {
2087                 struct v4l2_selection s = { .type = p->type };
2088                 int ret;
2089
2090                 /* obtaining bounds */
2091                 if (V4L2_TYPE_IS_OUTPUT(p->type))
2092                         s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2093                 else
2094                         s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2095
2096                 ret = ops->vidioc_g_selection(file, fh, &s);
2097                 if (ret)
2098                         return ret;
2099                 p->bounds = s.r;
2100
2101                 /* obtaining defrect */
2102                 if (V4L2_TYPE_IS_OUTPUT(p->type))
2103                         s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2104                 else
2105                         s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2106
2107                 ret = ops->vidioc_g_selection(file, fh, &s);
2108                 if (ret)
2109                         return ret;
2110                 p->defrect = s.r;
2111         }
2112
2113         /* setting trivial pixelaspect */
2114         p->pixelaspect.numerator = 1;
2115         p->pixelaspect.denominator = 1;
2116
2117         if (ops->vidioc_cropcap)
2118                 return ops->vidioc_cropcap(file, fh, p);
2119
2120         return 0;
2121 }
2122
2123 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2124                                 struct file *file, void *fh, void *arg)
2125 {
2126         struct video_device *vfd = video_devdata(file);
2127         int ret;
2128
2129         if (vfd->v4l2_dev)
2130                 pr_info("%s: =================  START STATUS  =================\n",
2131                         vfd->v4l2_dev->name);
2132         ret = ops->vidioc_log_status(file, fh);
2133         if (vfd->v4l2_dev)
2134                 pr_info("%s: ==================  END STATUS  ==================\n",
2135                         vfd->v4l2_dev->name);
2136         return ret;
2137 }
2138
2139 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2140                                 struct file *file, void *fh, void *arg)
2141 {
2142 #ifdef CONFIG_VIDEO_ADV_DEBUG
2143         struct v4l2_dbg_register *p = arg;
2144         struct video_device *vfd = video_devdata(file);
2145         struct v4l2_subdev *sd;
2146         int idx = 0;
2147
2148         if (!capable(CAP_SYS_ADMIN))
2149                 return -EPERM;
2150         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2151                 if (vfd->v4l2_dev == NULL)
2152                         return -EINVAL;
2153                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2154                         if (p->match.addr == idx++)
2155                                 return v4l2_subdev_call(sd, core, g_register, p);
2156                 return -EINVAL;
2157         }
2158         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2159             (ops->vidioc_g_chip_info || p->match.addr == 0))
2160                 return ops->vidioc_g_register(file, fh, p);
2161         return -EINVAL;
2162 #else
2163         return -ENOTTY;
2164 #endif
2165 }
2166
2167 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2168                                 struct file *file, void *fh, void *arg)
2169 {
2170 #ifdef CONFIG_VIDEO_ADV_DEBUG
2171         const struct v4l2_dbg_register *p = arg;
2172         struct video_device *vfd = video_devdata(file);
2173         struct v4l2_subdev *sd;
2174         int idx = 0;
2175
2176         if (!capable(CAP_SYS_ADMIN))
2177                 return -EPERM;
2178         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2179                 if (vfd->v4l2_dev == NULL)
2180                         return -EINVAL;
2181                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2182                         if (p->match.addr == idx++)
2183                                 return v4l2_subdev_call(sd, core, s_register, p);
2184                 return -EINVAL;
2185         }
2186         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2187             (ops->vidioc_g_chip_info || p->match.addr == 0))
2188                 return ops->vidioc_s_register(file, fh, p);
2189         return -EINVAL;
2190 #else
2191         return -ENOTTY;
2192 #endif
2193 }
2194
2195 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2196                                 struct file *file, void *fh, void *arg)
2197 {
2198 #ifdef CONFIG_VIDEO_ADV_DEBUG
2199         struct video_device *vfd = video_devdata(file);
2200         struct v4l2_dbg_chip_info *p = arg;
2201         struct v4l2_subdev *sd;
2202         int idx = 0;
2203
2204         switch (p->match.type) {
2205         case V4L2_CHIP_MATCH_BRIDGE:
2206                 if (ops->vidioc_s_register)
2207                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2208                 if (ops->vidioc_g_register)
2209                         p->flags |= V4L2_CHIP_FL_READABLE;
2210                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2211                 if (ops->vidioc_g_chip_info)
2212                         return ops->vidioc_g_chip_info(file, fh, arg);
2213                 if (p->match.addr)
2214                         return -EINVAL;
2215                 return 0;
2216
2217         case V4L2_CHIP_MATCH_SUBDEV:
2218                 if (vfd->v4l2_dev == NULL)
2219                         break;
2220                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2221                         if (p->match.addr != idx++)
2222                                 continue;
2223                         if (sd->ops->core && sd->ops->core->s_register)
2224                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2225                         if (sd->ops->core && sd->ops->core->g_register)
2226                                 p->flags |= V4L2_CHIP_FL_READABLE;
2227                         strlcpy(p->name, sd->name, sizeof(p->name));
2228                         return 0;
2229                 }
2230                 break;
2231         }
2232         return -EINVAL;
2233 #else
2234         return -ENOTTY;
2235 #endif
2236 }
2237
2238 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2239                                 struct file *file, void *fh, void *arg)
2240 {
2241         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2242 }
2243
2244 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2245                                 struct file *file, void *fh, void *arg)
2246 {
2247         return ops->vidioc_subscribe_event(fh, arg);
2248 }
2249
2250 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2251                                 struct file *file, void *fh, void *arg)
2252 {
2253         return ops->vidioc_unsubscribe_event(fh, arg);
2254 }
2255
2256 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2257                                 struct file *file, void *fh, void *arg)
2258 {
2259         struct v4l2_sliced_vbi_cap *p = arg;
2260         int ret = check_fmt(file, p->type);
2261
2262         if (ret)
2263                 return ret;
2264
2265         /* Clear up to type, everything after type is zeroed already */
2266         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2267
2268         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2269 }
2270
2271 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2272                                 struct file *file, void *fh, void *arg)
2273 {
2274         struct video_device *vfd = video_devdata(file);
2275         struct v4l2_frequency_band *p = arg;
2276         enum v4l2_tuner_type type;
2277         int err;
2278
2279         if (vfd->vfl_type == VFL_TYPE_SDR) {
2280                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
2281                         return -EINVAL;
2282                 type = p->type;
2283         } else {
2284                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2285                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2286                 if (type != p->type)
2287                         return -EINVAL;
2288         }
2289         if (ops->vidioc_enum_freq_bands) {
2290                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2291                 if (err != -ENOTTY)
2292                         return err;
2293         }
2294         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2295                 struct v4l2_tuner t = {
2296                         .index = p->tuner,
2297                         .type = type,
2298                 };
2299
2300                 if (p->index)
2301                         return -EINVAL;
2302                 err = ops->vidioc_g_tuner(file, fh, &t);
2303                 if (err)
2304                         return err;
2305                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2306                 p->rangelow = t.rangelow;
2307                 p->rangehigh = t.rangehigh;
2308                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2309                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2310                 return 0;
2311         }
2312         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2313                 struct v4l2_modulator m = {
2314                         .index = p->tuner,
2315                 };
2316
2317                 if (type != V4L2_TUNER_RADIO)
2318                         return -EINVAL;
2319                 if (p->index)
2320                         return -EINVAL;
2321                 err = ops->vidioc_g_modulator(file, fh, &m);
2322                 if (err)
2323                         return err;
2324                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2325                 p->rangelow = m.rangelow;
2326                 p->rangehigh = m.rangehigh;
2327                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2328                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2329                 return 0;
2330         }
2331         return -ENOTTY;
2332 }
2333
2334 struct v4l2_ioctl_info {
2335         unsigned int ioctl;
2336         u32 flags;
2337         const char * const name;
2338         union {
2339                 u32 offset;
2340                 int (*func)(const struct v4l2_ioctl_ops *ops,
2341                                 struct file *file, void *fh, void *p);
2342         } u;
2343         void (*debug)(const void *arg, bool write_only);
2344 };
2345
2346 /* This control needs a priority check */
2347 #define INFO_FL_PRIO    (1 << 0)
2348 /* This control can be valid if the filehandle passes a control handler. */
2349 #define INFO_FL_CTRL    (1 << 1)
2350 /* This is a standard ioctl, no need for special code */
2351 #define INFO_FL_STD     (1 << 2)
2352 /* This is ioctl has its own function */
2353 #define INFO_FL_FUNC    (1 << 3)
2354 /* Queuing ioctl */
2355 #define INFO_FL_QUEUE   (1 << 4)
2356 /* Zero struct from after the field to the end */
2357 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2358         ((offsetof(struct v4l2_struct, field) +                 \
2359           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2360 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2361
2362 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2363         [_IOC_NR(_ioctl)] = {                                           \
2364                 .ioctl = _ioctl,                                        \
2365                 .flags = _flags | INFO_FL_STD,                          \
2366                 .name = #_ioctl,                                        \
2367                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2368                 .debug = _debug,                                        \
2369         }
2370
2371 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2372         [_IOC_NR(_ioctl)] = {                                           \
2373                 .ioctl = _ioctl,                                        \
2374                 .flags = _flags | INFO_FL_FUNC,                         \
2375                 .name = #_ioctl,                                        \
2376                 .u.func = _func,                                        \
2377                 .debug = _debug,                                        \
2378         }
2379
2380 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2381         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2382         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2383         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2384         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2385         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2386         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2387         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2388         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2389         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2390         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2391         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2392         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2393         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2394         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2395         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2396         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2397         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2398         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2399         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2400         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2401         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2402         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2403         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2404         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2405         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2406         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2407         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2408         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2409         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2410         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2411         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2412         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2413         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2414         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2415         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2416         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2417         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2418         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2419         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2420         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2421         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2422         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2423         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2424         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2425         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2426         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2427         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2428         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2429         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2430         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2431         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2432         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2433         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2434         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2435         IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2436         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2437         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2438         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2439         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2440         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2441         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2442         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2443         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2444         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2445         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2446         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2447         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2448         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2449         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2450         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2451         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2452         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2453         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2454         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2455         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2456         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2457         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2458         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2459         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2460         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2461         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2462         IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2463 };
2464 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2465
2466 bool v4l2_is_known_ioctl(unsigned int cmd)
2467 {
2468         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2469                 return false;
2470         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2471 }
2472
2473 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2474 {
2475         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2476                 return vdev->lock;
2477         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2478                 return NULL;
2479         if (vdev->queue && vdev->queue->lock &&
2480                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2481                 return vdev->queue->lock;
2482         return vdev->lock;
2483 }
2484
2485 /* Common ioctl debug function. This function can be used by
2486    external ioctl messages as well as internal V4L ioctl */
2487 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2488 {
2489         const char *dir, *type;
2490
2491         if (prefix)
2492                 printk(KERN_DEBUG "%s: ", prefix);
2493
2494         switch (_IOC_TYPE(cmd)) {
2495         case 'd':
2496                 type = "v4l2_int";
2497                 break;
2498         case 'V':
2499                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2500                         type = "v4l2";
2501                         break;
2502                 }
2503                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2504                 return;
2505         default:
2506                 type = "unknown";
2507                 break;
2508         }
2509
2510         switch (_IOC_DIR(cmd)) {
2511         case _IOC_NONE:              dir = "--"; break;
2512         case _IOC_READ:              dir = "r-"; break;
2513         case _IOC_WRITE:             dir = "-w"; break;
2514         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2515         default:                     dir = "*ERR*"; break;
2516         }
2517         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2518                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2519 }
2520 EXPORT_SYMBOL(v4l_printk_ioctl);
2521
2522 static long __video_do_ioctl(struct file *file,
2523                 unsigned int cmd, void *arg)
2524 {
2525         struct video_device *vfd = video_devdata(file);
2526         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2527         bool write_only = false;
2528         struct v4l2_ioctl_info default_info;
2529         const struct v4l2_ioctl_info *info;
2530         void *fh = file->private_data;
2531         struct v4l2_fh *vfh = NULL;
2532         int dev_debug = vfd->dev_debug;
2533         long ret = -ENOTTY;
2534
2535         if (ops == NULL) {
2536                 pr_warn("%s: has no ioctl_ops.\n",
2537                                 video_device_node_name(vfd));
2538                 return ret;
2539         }
2540
2541         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2542                 vfh = file->private_data;
2543
2544         if (v4l2_is_known_ioctl(cmd)) {
2545                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2546
2547                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2548                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2549                         goto done;
2550
2551                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2552                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2553                         if (ret)
2554                                 goto done;
2555                 }
2556         } else {
2557                 default_info.ioctl = cmd;
2558                 default_info.flags = 0;
2559                 default_info.debug = v4l_print_default;
2560                 info = &default_info;
2561         }
2562
2563         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2564         if (info->flags & INFO_FL_STD) {
2565                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2566                 const void *p = vfd->ioctl_ops;
2567                 const vidioc_op *vidioc = p + info->u.offset;
2568
2569                 ret = (*vidioc)(file, fh, arg);
2570         } else if (info->flags & INFO_FL_FUNC) {
2571                 ret = info->u.func(ops, file, fh, arg);
2572         } else if (!ops->vidioc_default) {
2573                 ret = -ENOTTY;
2574         } else {
2575                 ret = ops->vidioc_default(file, fh,
2576                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2577                         cmd, arg);
2578         }
2579
2580 done:
2581         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2582                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2583                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2584                         return ret;
2585
2586                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2587                 if (ret < 0)
2588                         pr_cont(": error %ld", ret);
2589                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2590                         pr_cont("\n");
2591                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2592                         info->debug(arg, write_only);
2593                 else {
2594                         pr_cont(": ");
2595                         info->debug(arg, write_only);
2596                 }
2597         }
2598
2599         return ret;
2600 }
2601
2602 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2603                             void __user **user_ptr, void ***kernel_ptr)
2604 {
2605         int ret = 0;
2606
2607         switch (cmd) {
2608         case VIDIOC_PREPARE_BUF:
2609         case VIDIOC_QUERYBUF:
2610         case VIDIOC_QBUF:
2611         case VIDIOC_DQBUF: {
2612                 struct v4l2_buffer *buf = parg;
2613
2614                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2615                         if (buf->length > VIDEO_MAX_PLANES) {
2616                                 ret = -EINVAL;
2617                                 break;
2618                         }
2619                         *user_ptr = (void __user *)buf->m.planes;
2620                         *kernel_ptr = (void **)&buf->m.planes;
2621                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2622                         ret = 1;
2623                 }
2624                 break;
2625         }
2626
2627         case VIDIOC_G_EDID:
2628         case VIDIOC_S_EDID: {
2629                 struct v4l2_edid *edid = parg;
2630
2631                 if (edid->blocks) {
2632                         if (edid->blocks > 256) {
2633                                 ret = -EINVAL;
2634                                 break;
2635                         }
2636                         *user_ptr = (void __user *)edid->edid;
2637                         *kernel_ptr = (void **)&edid->edid;
2638                         *array_size = edid->blocks * 128;
2639                         ret = 1;
2640                 }
2641                 break;
2642         }
2643
2644         case VIDIOC_S_EXT_CTRLS:
2645         case VIDIOC_G_EXT_CTRLS:
2646         case VIDIOC_TRY_EXT_CTRLS: {
2647                 struct v4l2_ext_controls *ctrls = parg;
2648
2649                 if (ctrls->count != 0) {
2650                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2651                                 ret = -EINVAL;
2652                                 break;
2653                         }
2654                         *user_ptr = (void __user *)ctrls->controls;
2655                         *kernel_ptr = (void **)&ctrls->controls;
2656                         *array_size = sizeof(struct v4l2_ext_control)
2657                                     * ctrls->count;
2658                         ret = 1;
2659                 }
2660                 break;
2661         }
2662         }
2663
2664         return ret;
2665 }
2666
2667 long
2668 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2669                v4l2_kioctl func)
2670 {
2671         char    sbuf[128];
2672         void    *mbuf = NULL;
2673         void    *parg = (void *)arg;
2674         long    err  = -EINVAL;
2675         bool    has_array_args;
2676         size_t  array_size = 0;
2677         void __user *user_ptr = NULL;
2678         void    **kernel_ptr = NULL;
2679
2680         /*  Copy arguments into temp kernel buffer  */
2681         if (_IOC_DIR(cmd) != _IOC_NONE) {
2682                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2683                         parg = sbuf;
2684                 } else {
2685                         /* too big to allocate from stack */
2686                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2687                         if (NULL == mbuf)
2688                                 return -ENOMEM;
2689                         parg = mbuf;
2690                 }
2691
2692                 err = -EFAULT;
2693                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2694                         unsigned int n = _IOC_SIZE(cmd);
2695
2696                         /*
2697                          * In some cases, only a few fields are used as input,
2698                          * i.e. when the app sets "index" and then the driver
2699                          * fills in the rest of the structure for the thing
2700                          * with that index.  We only need to copy up the first
2701                          * non-input field.
2702                          */
2703                         if (v4l2_is_known_ioctl(cmd)) {
2704                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2705                                 if (flags & INFO_FL_CLEAR_MASK)
2706                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2707                         }
2708
2709                         if (copy_from_user(parg, (void __user *)arg, n))
2710                                 goto out;
2711
2712                         /* zero out anything we don't copy from userspace */
2713                         if (n < _IOC_SIZE(cmd))
2714                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2715                 } else {
2716                         /* read-only ioctl */
2717                         memset(parg, 0, _IOC_SIZE(cmd));
2718                 }
2719         }
2720
2721         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2722         if (err < 0)
2723                 goto out;
2724         has_array_args = err;
2725
2726         if (has_array_args) {
2727                 /*
2728                  * When adding new types of array args, make sure that the
2729                  * parent argument to ioctl (which contains the pointer to the
2730                  * array) fits into sbuf (so that mbuf will still remain
2731                  * unused up to here).
2732                  */
2733                 mbuf = kmalloc(array_size, GFP_KERNEL);
2734                 err = -ENOMEM;
2735                 if (NULL == mbuf)
2736                         goto out_array_args;
2737                 err = -EFAULT;
2738                 if (copy_from_user(mbuf, user_ptr, array_size))
2739                         goto out_array_args;
2740                 *kernel_ptr = mbuf;
2741         }
2742
2743         /* Handles IOCTL */
2744         err = func(file, cmd, parg);
2745         if (err == -ENOIOCTLCMD)
2746                 err = -ENOTTY;
2747         if (err == 0) {
2748                 if (cmd == VIDIOC_DQBUF)
2749                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2750                 else if (cmd == VIDIOC_QBUF)
2751                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2752         }
2753
2754         if (has_array_args) {
2755                 *kernel_ptr = (void __force *)user_ptr;
2756                 if (copy_to_user(user_ptr, mbuf, array_size))
2757                         err = -EFAULT;
2758                 goto out_array_args;
2759         }
2760         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2761            results that must be returned. */
2762         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2763                 goto out;
2764
2765 out_array_args:
2766         /*  Copy results into user buffer  */
2767         switch (_IOC_DIR(cmd)) {
2768         case _IOC_READ:
2769         case (_IOC_WRITE | _IOC_READ):
2770                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2771                         err = -EFAULT;
2772                 break;
2773         }
2774
2775 out:
2776         kfree(mbuf);
2777         return err;
2778 }
2779 EXPORT_SYMBOL(video_usercopy);
2780
2781 long video_ioctl2(struct file *file,
2782                unsigned int cmd, unsigned long arg)
2783 {
2784         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2785 }
2786 EXPORT_SYMBOL(video_ioctl2);