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 #define CREATE_TRACE_POINTS
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparations. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 146         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 147         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 148         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 149         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 150         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 151         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 153         [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\n",
 260                         pix->width, pix->height,
 261                         (pix->pixelformat & 0xff),
 262                         (pix->pixelformat >>  8) & 0xff,
 263                         (pix->pixelformat >> 16) & 0xff,
 264                         (pix->pixelformat >> 24) & 0xff,
 265                         prt_names(pix->field, v4l2_field_names),
 266                         pix->bytesperline, pix->sizeimage,
 267                         pix->colorspace);
 268                 break;
 269         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 270         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 271                 mp = &p->fmt.pix_mp;
 272                 pr_cont(", width=%u, height=%u, "
 273                         "format=%c%c%c%c, field=%s, "
 274                         "colorspace=%d, num_planes=%u\n",
 275                         mp->width, mp->height,
 276                         (mp->pixelformat & 0xff),
 277                         (mp->pixelformat >>  8) & 0xff,
 278                         (mp->pixelformat >> 16) & 0xff,
 279                         (mp->pixelformat >> 24) & 0xff,
 280                         prt_names(mp->field, v4l2_field_names),
 281                         mp->colorspace, mp->num_planes);
 282                 for (i = 0; i < mp->num_planes; i++)
 283                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 284                                         mp->plane_fmt[i].bytesperline,
 285                                         mp->plane_fmt[i].sizeimage);
 286                 break;
 287         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 288         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 289                 win = &p->fmt.win;
 290                 /* Note: we can't print the clip list here since the clips
 291                  * pointer is a userspace pointer, not a kernelspace
 292                  * pointer. */
 293                 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",
 294                         win->w.width, win->w.height, win->w.left, win->w.top,
 295                         prt_names(win->field, v4l2_field_names),
 296                         win->chromakey, win->clipcount, win->clips,
 297                         win->bitmap, win->global_alpha);
 298                 break;
 299         case V4L2_BUF_TYPE_VBI_CAPTURE:
 300         case V4L2_BUF_TYPE_VBI_OUTPUT:
 301                 vbi = &p->fmt.vbi;
 302                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 303                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 304                         vbi->sampling_rate, vbi->offset,
 305                         vbi->samples_per_line,
 306                         (vbi->sample_format & 0xff),
 307                         (vbi->sample_format >>  8) & 0xff,
 308                         (vbi->sample_format >> 16) & 0xff,
 309                         (vbi->sample_format >> 24) & 0xff,
 310                         vbi->start[0], vbi->start[1],
 311                         vbi->count[0], vbi->count[1]);
 312                 break;
 313         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 314         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 315                 sliced = &p->fmt.sliced;
 316                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 317                                 sliced->service_set, sliced->io_size);
 318                 for (i = 0; i < 24; i++)
 319                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 320                                 sliced->service_lines[0][i],
 321                                 sliced->service_lines[1][i]);
 322                 break;
 323         case V4L2_BUF_TYPE_SDR_CAPTURE:
 324                 sdr = &p->fmt.sdr;
 325                 pr_cont(", pixelformat=%c%c%c%c\n",
 326                         (sdr->pixelformat >>  0) & 0xff,
 327                         (sdr->pixelformat >>  8) & 0xff,
 328                         (sdr->pixelformat >> 16) & 0xff,
 329                         (sdr->pixelformat >> 24) & 0xff);
 330                 break;
 331         }
 332 }
 333
 334 static void v4l_print_framebuffer(const void *arg, bool write_only)
 335 {
 336         const struct v4l2_framebuffer *p = arg;
 337
 338         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 339                 "height=%u, pixelformat=%c%c%c%c, "
 340                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 341                         p->capability, p->flags, p->base,
 342                         p->fmt.width, p->fmt.height,
 343                         (p->fmt.pixelformat & 0xff),
 344                         (p->fmt.pixelformat >>  8) & 0xff,
 345                         (p->fmt.pixelformat >> 16) & 0xff,
 346                         (p->fmt.pixelformat >> 24) & 0xff,
 347                         p->fmt.bytesperline, p->fmt.sizeimage,
 348                         p->fmt.colorspace);
 349 }
 350
 351 static void v4l_print_buftype(const void *arg, bool write_only)
 352 {
 353         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 354 }
 355
 356 static void v4l_print_modulator(const void *arg, bool write_only)
 357 {
 358         const struct v4l2_modulator *p = arg;
 359
 360         if (write_only)
 361                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 362         else
 363                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 364                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 365                         p->index, (int)sizeof(p->name), p->name, p->capability,
 366                         p->rangelow, p->rangehigh, p->txsubchans);
 367 }
 368
 369 static void v4l_print_tuner(const void *arg, bool write_only)
 370 {
 371         const struct v4l2_tuner *p = arg;
 372
 373         if (write_only)
 374                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 375         else
 376                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 377                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 378                         "rxsubchans=0x%x, audmode=%u\n",
 379                         p->index, (int)sizeof(p->name), p->name, p->type,
 380                         p->capability, p->rangelow,
 381                         p->rangehigh, p->signal, p->afc,
 382                         p->rxsubchans, p->audmode);
 383 }
 384
 385 static void v4l_print_frequency(const void *arg, bool write_only)
 386 {
 387         const struct v4l2_frequency *p = arg;
 388
 389         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 390                                 p->tuner, p->type, p->frequency);
 391 }
 392
 393 static void v4l_print_standard(const void *arg, bool write_only)
 394 {
 395         const struct v4l2_standard *p = arg;
 396
 397         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 398                 "framelines=%u\n", p->index,
 399                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 400                 p->frameperiod.numerator,
 401                 p->frameperiod.denominator,
 402                 p->framelines);
 403 }
 404
 405 static void v4l_print_std(const void *arg, bool write_only)
 406 {
 407         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 408 }
 409
 410 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 411 {
 412         const struct v4l2_hw_freq_seek *p = arg;
 413
 414         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 415                 "rangelow=%u, rangehigh=%u\n",
 416                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 417                 p->rangelow, p->rangehigh);
 418 }
 419
 420 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 421 {
 422         const struct v4l2_requestbuffers *p = arg;
 423
 424         pr_cont("count=%d, type=%s, memory=%s\n",
 425                 p->count,
 426                 prt_names(p->type, v4l2_type_names),
 427                 prt_names(p->memory, v4l2_memory_names));
 428 }
 429
 430 static void v4l_print_buffer(const void *arg, bool write_only)
 431 {
 432         const struct v4l2_buffer *p = arg;
 433         const struct v4l2_timecode *tc = &p->timecode;
 434         const struct v4l2_plane *plane;
 435         int i;
 436
 437         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 438                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 439                         p->timestamp.tv_sec / 3600,
 440                         (int)(p->timestamp.tv_sec / 60) % 60,
 441                         (int)(p->timestamp.tv_sec % 60),
 442                         (long)p->timestamp.tv_usec,
 443                         p->index,
 444                         prt_names(p->type, v4l2_type_names),
 445                         p->flags, prt_names(p->field, v4l2_field_names),
 446                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 447
 448         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 449                 pr_cont("\n");
 450                 for (i = 0; i < p->length; ++i) {
 451                         plane = &p->m.planes[i];
 452                         printk(KERN_DEBUG
 453                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 454                                 "offset/userptr=0x%lx, length=%d\n",
 455                                 i, plane->bytesused, plane->data_offset,
 456                                 plane->m.userptr, plane->length);
 457                 }
 458         } else {
 459                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 460                         p->bytesused, p->m.userptr, p->length);
 461         }
 462
 463         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 464                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 465                         tc->hours, tc->minutes, tc->seconds,
 466                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 467 }
 468
 469 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 470 {
 471         const struct v4l2_exportbuffer *p = arg;
 472
 473         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 474                 p->fd, prt_names(p->type, v4l2_type_names),
 475                 p->index, p->plane, p->flags);
 476 }
 477
 478 static void v4l_print_create_buffers(const void *arg, bool write_only)
 479 {
 480         const struct v4l2_create_buffers *p = arg;
 481
 482         pr_cont("index=%d, count=%d, memory=%s, ",
 483                         p->index, p->count,
 484                         prt_names(p->memory, v4l2_memory_names));
 485         v4l_print_format(&p->format, write_only);
 486 }
 487
 488 static void v4l_print_streamparm(const void *arg, bool write_only)
 489 {
 490         const struct v4l2_streamparm *p = arg;
 491
 492         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 493
 494         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 495             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 496                 const struct v4l2_captureparm *c = &p->parm.capture;
 497
 498                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 499                         "extendedmode=%d, readbuffers=%d\n",
 500                         c->capability, c->capturemode,
 501                         c->timeperframe.numerator, c->timeperframe.denominator,
 502                         c->extendedmode, c->readbuffers);
 503         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 504                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 505                 const struct v4l2_outputparm *c = &p->parm.output;
 506
 507                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 508                         "extendedmode=%d, writebuffers=%d\n",
 509                         c->capability, c->outputmode,
 510                         c->timeperframe.numerator, c->timeperframe.denominator,
 511                         c->extendedmode, c->writebuffers);
 512         } else {
 513                 pr_cont("\n");
 514         }
 515 }
 516
 517 static void v4l_print_queryctrl(const void *arg, bool write_only)
 518 {
 519         const struct v4l2_queryctrl *p = arg;
 520
 521         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 522                 "step=%d, default=%d, flags=0x%08x\n",
 523                         p->id, p->type, (int)sizeof(p->name), p->name,
 524                         p->minimum, p->maximum,
 525                         p->step, p->default_value, p->flags);
 526 }
 527
 528 static void v4l_print_querymenu(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_querymenu *p = arg;
 531
 532         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 533 }
 534
 535 static void v4l_print_control(const void *arg, bool write_only)
 536 {
 537         const struct v4l2_control *p = arg;
 538
 539         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 540 }
 541
 542 static void v4l_print_ext_controls(const void *arg, bool write_only)
 543 {
 544         const struct v4l2_ext_controls *p = arg;
 545         int i;
 546
 547         pr_cont("class=0x%x, count=%d, error_idx=%d",
 548                         p->ctrl_class, p->count, p->error_idx);
 549         for (i = 0; i < p->count; i++) {
 550                 if (p->controls[i].size)
 551                         pr_cont(", id/val=0x%x/0x%x",
 552                                 p->controls[i].id, p->controls[i].value);
 553                 else
 554                         pr_cont(", id/size=0x%x/%u",
 555                                 p->controls[i].id, p->controls[i].size);
 556         }
 557         pr_cont("\n");
 558 }
 559
 560 static void v4l_print_cropcap(const void *arg, bool write_only)
 561 {
 562         const struct v4l2_cropcap *p = arg;
 563
 564         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 565                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 566                 "pixelaspect %d/%d\n",
 567                 prt_names(p->type, v4l2_type_names),
 568                 p->bounds.width, p->bounds.height,
 569                 p->bounds.left, p->bounds.top,
 570                 p->defrect.width, p->defrect.height,
 571                 p->defrect.left, p->defrect.top,
 572                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 573 }
 574
 575 static void v4l_print_crop(const void *arg, bool write_only)
 576 {
 577         const struct v4l2_crop *p = arg;
 578
 579         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 580                 prt_names(p->type, v4l2_type_names),
 581                 p->c.width, p->c.height,
 582                 p->c.left, p->c.top);
 583 }
 584
 585 static void v4l_print_selection(const void *arg, bool write_only)
 586 {
 587         const struct v4l2_selection *p = arg;
 588
 589         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 590                 prt_names(p->type, v4l2_type_names),
 591                 p->target, p->flags,
 592                 p->r.width, p->r.height, p->r.left, p->r.top);
 593 }
 594
 595 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 596 {
 597         const struct v4l2_jpegcompression *p = arg;
 598
 599         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 600                 "COM_len=%d, jpeg_markers=0x%x\n",
 601                 p->quality, p->APPn, p->APP_len,
 602                 p->COM_len, p->jpeg_markers);
 603 }
 604
 605 static void v4l_print_enc_idx(const void *arg, bool write_only)
 606 {
 607         const struct v4l2_enc_idx *p = arg;
 608
 609         pr_cont("entries=%d, entries_cap=%d\n",
 610                         p->entries, p->entries_cap);
 611 }
 612
 613 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 614 {
 615         const struct v4l2_encoder_cmd *p = arg;
 616
 617         pr_cont("cmd=%d, flags=0x%x\n",
 618                         p->cmd, p->flags);
 619 }
 620
 621 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_decoder_cmd *p = arg;
 624
 625         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 626
 627         if (p->cmd == V4L2_DEC_CMD_START)
 628                 pr_info("speed=%d, format=%u\n",
 629                                 p->start.speed, p->start.format);
 630         else if (p->cmd == V4L2_DEC_CMD_STOP)
 631                 pr_info("pts=%llu\n", p->stop.pts);
 632 }
 633
 634 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 635 {
 636         const struct v4l2_dbg_chip_info *p = arg;
 637
 638         pr_cont("type=%u, ", p->match.type);
 639         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 640                 pr_cont("name=%.*s, ",
 641                                 (int)sizeof(p->match.name), p->match.name);
 642         else
 643                 pr_cont("addr=%u, ", p->match.addr);
 644         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 645 }
 646
 647 static void v4l_print_dbg_register(const void *arg, bool write_only)
 648 {
 649         const struct v4l2_dbg_register *p = arg;
 650
 651         pr_cont("type=%u, ", p->match.type);
 652         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 653                 pr_cont("name=%.*s, ",
 654                                 (int)sizeof(p->match.name), p->match.name);
 655         else
 656                 pr_cont("addr=%u, ", p->match.addr);
 657         pr_cont("reg=0x%llx, val=0x%llx\n",
 658                         p->reg, p->val);
 659 }
 660
 661 static void v4l_print_dv_timings(const void *arg, bool write_only)
 662 {
 663         const struct v4l2_dv_timings *p = arg;
 664
 665         switch (p->type) {
 666         case V4L2_DV_BT_656_1120:
 667                 pr_cont("type=bt-656/1120, interlaced=%u, "
 668                         "pixelclock=%llu, "
 669                         "width=%u, height=%u, polarities=0x%x, "
 670                         "hfrontporch=%u, hsync=%u, "
 671                         "hbackporch=%u, vfrontporch=%u, "
 672                         "vsync=%u, vbackporch=%u, "
 673                         "il_vfrontporch=%u, il_vsync=%u, "
 674                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 675                                 p->bt.interlaced, p->bt.pixelclock,
 676                                 p->bt.width, p->bt.height,
 677                                 p->bt.polarities, p->bt.hfrontporch,
 678                                 p->bt.hsync, p->bt.hbackporch,
 679                                 p->bt.vfrontporch, p->bt.vsync,
 680                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 681                                 p->bt.il_vsync, p->bt.il_vbackporch,
 682                                 p->bt.standards, p->bt.flags);
 683                 break;
 684         default:
 685                 pr_cont("type=%d\n", p->type);
 686                 break;
 687         }
 688 }
 689
 690 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 691 {
 692         const struct v4l2_enum_dv_timings *p = arg;
 693
 694         pr_cont("index=%u, ", p->index);
 695         v4l_print_dv_timings(&p->timings, write_only);
 696 }
 697
 698 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 699 {
 700         const struct v4l2_dv_timings_cap *p = arg;
 701
 702         switch (p->type) {
 703         case V4L2_DV_BT_656_1120:
 704                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 705                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 706                         p->bt.min_width, p->bt.max_width,
 707                         p->bt.min_height, p->bt.max_height,
 708                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 709                         p->bt.standards, p->bt.capabilities);
 710                 break;
 711         default:
 712                 pr_cont("type=%u\n", p->type);
 713                 break;
 714         }
 715 }
 716
 717 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 718 {
 719         const struct v4l2_frmsizeenum *p = arg;
 720
 721         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 722                         p->index,
 723                         (p->pixel_format & 0xff),
 724                         (p->pixel_format >>  8) & 0xff,
 725                         (p->pixel_format >> 16) & 0xff,
 726                         (p->pixel_format >> 24) & 0xff,
 727                         p->type);
 728         switch (p->type) {
 729         case V4L2_FRMSIZE_TYPE_DISCRETE:
 730                 pr_cont(", wxh=%ux%u\n",
 731                         p->discrete.width, p->discrete.height);
 732                 break;
 733         case V4L2_FRMSIZE_TYPE_STEPWISE:
 734                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 735                                 p->stepwise.min_width,  p->stepwise.min_height,
 736                                 p->stepwise.step_width, p->stepwise.step_height,
 737                                 p->stepwise.max_width,  p->stepwise.max_height);
 738                 break;
 739         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 740                 /* fall through */
 741         default:
 742                 pr_cont("\n");
 743                 break;
 744         }
 745 }
 746
 747 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 748 {
 749         const struct v4l2_frmivalenum *p = arg;
 750
 751         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 752                         p->index,
 753                         (p->pixel_format & 0xff),
 754                         (p->pixel_format >>  8) & 0xff,
 755                         (p->pixel_format >> 16) & 0xff,
 756                         (p->pixel_format >> 24) & 0xff,
 757                         p->width, p->height, p->type);
 758         switch (p->type) {
 759         case V4L2_FRMIVAL_TYPE_DISCRETE:
 760                 pr_cont(", fps=%d/%d\n",
 761                                 p->discrete.numerator,
 762                                 p->discrete.denominator);
 763                 break;
 764         case V4L2_FRMIVAL_TYPE_STEPWISE:
 765                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 766                                 p->stepwise.min.numerator,
 767                                 p->stepwise.min.denominator,
 768                                 p->stepwise.max.numerator,
 769                                 p->stepwise.max.denominator,
 770                                 p->stepwise.step.numerator,
 771                                 p->stepwise.step.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 774                 /* fall through */
 775         default:
 776                 pr_cont("\n");
 777                 break;
 778         }
 779 }
 780
 781 static void v4l_print_event(const void *arg, bool write_only)
 782 {
 783         const struct v4l2_event *p = arg;
 784         const struct v4l2_event_ctrl *c;
 785
 786         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 787                 "timestamp=%lu.%9.9lu\n",
 788                         p->type, p->pending, p->sequence, p->id,
 789                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 790         switch (p->type) {
 791         case V4L2_EVENT_VSYNC:
 792                 printk(KERN_DEBUG "field=%s\n",
 793                         prt_names(p->u.vsync.field, v4l2_field_names));
 794                 break;
 795         case V4L2_EVENT_CTRL:
 796                 c = &p->u.ctrl;
 797                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 798                         c->changes, c->type);
 799                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 800                         pr_cont("value64=%lld, ", c->value64);
 801                 else
 802                         pr_cont("value=%d, ", c->value);
 803                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 804                         "default_value=%d\n",
 805                         c->flags, c->minimum, c->maximum,
 806                         c->step, c->default_value);
 807                 break;
 808         case V4L2_EVENT_FRAME_SYNC:
 809                 pr_cont("frame_sequence=%u\n",
 810                         p->u.frame_sync.frame_sequence);
 811                 break;
 812         }
 813 }
 814
 815 static void v4l_print_event_subscription(const void *arg, bool write_only)
 816 {
 817         const struct v4l2_event_subscription *p = arg;
 818
 819         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 820                         p->type, p->id, p->flags);
 821 }
 822
 823 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 824 {
 825         const struct v4l2_sliced_vbi_cap *p = arg;
 826         int i;
 827
 828         pr_cont("type=%s, service_set=0x%08x\n",
 829                         prt_names(p->type, v4l2_type_names), p->service_set);
 830         for (i = 0; i < 24; i++)
 831                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 832                                 p->service_lines[0][i],
 833                                 p->service_lines[1][i]);
 834 }
 835
 836 static void v4l_print_freq_band(const void *arg, bool write_only)
 837 {
 838         const struct v4l2_frequency_band *p = arg;
 839
 840         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 841                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 842                         p->tuner, p->type, p->index,
 843                         p->capability, p->rangelow,
 844                         p->rangehigh, p->modulation);
 845 }
 846
 847 static void v4l_print_edid(const void *arg, bool write_only)
 848 {
 849         const struct v4l2_edid *p = arg;
 850
 851         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 852                 p->pad, p->start_block, p->blocks);
 853 }
 854
 855 static void v4l_print_u32(const void *arg, bool write_only)
 856 {
 857         pr_cont("value=%u\n", *(const u32 *)arg);
 858 }
 859
 860 static void v4l_print_newline(const void *arg, bool write_only)
 861 {
 862         pr_cont("\n");
 863 }
 864
 865 static void v4l_print_default(const void *arg, bool write_only)
 866 {
 867         pr_cont("driver-specific ioctl\n");
 868 }
 869
 870 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 871 {
 872         __u32 i;
 873
 874         /* zero the reserved fields */
 875         c->reserved[0] = c->reserved[1] = 0;
 876         for (i = 0; i < c->count; i++)
 877                 c->controls[i].reserved2[0] = 0;
 878
 879         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 880            when using extended controls.
 881            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 882            is it allowed for backwards compatibility.
 883          */
 884         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 885                 return 0;
 886         /* Check that all controls are from the same control class. */
 887         for (i = 0; i < c->count; i++) {
 888                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 889                         c->error_idx = i;
 890                         return 0;
 891                 }
 892         }
 893         return 1;
 894 }
 895
 896 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 897 {
 898         struct video_device *vfd = video_devdata(file);
 899         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 900         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 901         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 902         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 903         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 904         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 905
 906         if (ops == NULL)
 907                 return -EINVAL;
 908
 909         switch (type) {
 910         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 911                 if (is_vid && is_rx &&
 912                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 913                         return 0;
 914                 break;
 915         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 916                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 917                         return 0;
 918                 break;
 919         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 920                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 921                         return 0;
 922                 break;
 923         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 924                 if (is_vid && is_tx &&
 925                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 926                         return 0;
 927                 break;
 928         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 929                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 930                         return 0;
 931                 break;
 932         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 933                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 934                         return 0;
 935                 break;
 936         case V4L2_BUF_TYPE_VBI_CAPTURE:
 937                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 938                         return 0;
 939                 break;
 940         case V4L2_BUF_TYPE_VBI_OUTPUT:
 941                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 942                         return 0;
 943                 break;
 944         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 945                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 946                         return 0;
 947                 break;
 948         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 949                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 950                         return 0;
 951                 break;
 952         case V4L2_BUF_TYPE_SDR_CAPTURE:
 953                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 954                         return 0;
 955                 break;
 956         default:
 957                 break;
 958         }
 959         return -EINVAL;
 960 }
 961
 962 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 963                                 struct file *file, void *fh, void *arg)
 964 {
 965         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 966
 967         cap->version = LINUX_VERSION_CODE;
 968         return ops->vidioc_querycap(file, fh, cap);
 969 }
 970
 971 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 972                                 struct file *file, void *fh, void *arg)
 973 {
 974         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 975 }
 976
 977 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 978                                 struct file *file, void *fh, void *arg)
 979 {
 980         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 981 }
 982
 983 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 984                                 struct file *file, void *fh, void *arg)
 985 {
 986         struct video_device *vfd;
 987         u32 *p = arg;
 988
 989         if (ops->vidioc_g_priority)
 990                 return ops->vidioc_g_priority(file, fh, arg);
 991         vfd = video_devdata(file);
 992         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 993         return 0;
 994 }
 995
 996 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 997                                 struct file *file, void *fh, void *arg)
 998 {
 999         struct video_device *vfd;
1000         struct v4l2_fh *vfh;
1001         u32 *p = arg;
1002
1003         if (ops->vidioc_s_priority)
1004                 return ops->vidioc_s_priority(file, fh, *p);
1005         vfd = video_devdata(file);
1006         vfh = file->private_data;
1007         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1008 }
1009
1010 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1011                                 struct file *file, void *fh, void *arg)
1012 {
1013         struct video_device *vfd = video_devdata(file);
1014         struct v4l2_input *p = arg;
1015
1016         /*
1017          * We set the flags for CAP_DV_TIMINGS &
1018          * CAP_STD here based on ioctl handler provided by the
1019          * driver. If the driver doesn't support these
1020          * for a specific input, it must override these flags.
1021          */
1022         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1023                 p->capabilities |= V4L2_IN_CAP_STD;
1024
1025         return ops->vidioc_enum_input(file, fh, p);
1026 }
1027
1028 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1029                                 struct file *file, void *fh, void *arg)
1030 {
1031         struct video_device *vfd = video_devdata(file);
1032         struct v4l2_output *p = arg;
1033
1034         /*
1035          * We set the flags for CAP_DV_TIMINGS &
1036          * CAP_STD here based on ioctl handler provided by the
1037          * driver. If the driver doesn't support these
1038          * for a specific output, it must override these flags.
1039          */
1040         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1041                 p->capabilities |= V4L2_OUT_CAP_STD;
1042
1043         return ops->vidioc_enum_output(file, fh, p);
1044 }
1045
1046 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1047                                 struct file *file, void *fh, void *arg)
1048 {
1049         struct v4l2_fmtdesc *p = arg;
1050         struct video_device *vfd = video_devdata(file);
1051         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1052         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1053
1054         switch (p->type) {
1055         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1056                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1057                         break;
1058                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1059         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1060                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1061                         break;
1062                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1063         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1064                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1065                         break;
1066                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1067         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1068                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1069                         break;
1070                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1071         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1072                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1073                         break;
1074                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1075         case V4L2_BUF_TYPE_SDR_CAPTURE:
1076                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_sdr_cap))
1077                         break;
1078                 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1079         }
1080         return -EINVAL;
1081 }
1082
1083 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1084                                 struct file *file, void *fh, void *arg)
1085 {
1086         struct v4l2_format *p = arg;
1087         struct video_device *vfd = video_devdata(file);
1088         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1089         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1090         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1091         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1092
1093         switch (p->type) {
1094         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1095                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1096                         break;
1097                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1098         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1099                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1100                         break;
1101                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1102         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1103                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1104                         break;
1105                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1106         case V4L2_BUF_TYPE_VBI_CAPTURE:
1107                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1108                         break;
1109                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1110         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1111                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1112                         break;
1113                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1114         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1115                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1116                         break;
1117                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1118         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1119                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1120                         break;
1121                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1122         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1123                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1124                         break;
1125                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1126         case V4L2_BUF_TYPE_VBI_OUTPUT:
1127                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1128                         break;
1129                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1130         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1131                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1132                         break;
1133                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1134         case V4L2_BUF_TYPE_SDR_CAPTURE:
1135                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1136                         break;
1137                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1138         }
1139         return -EINVAL;
1140 }
1141
1142 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1143                                 struct file *file, void *fh, void *arg)
1144 {
1145         struct v4l2_format *p = arg;
1146         struct video_device *vfd = video_devdata(file);
1147         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1148         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1149         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1150         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1151
1152         switch (p->type) {
1153         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1154                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1155                         break;
1156                 CLEAR_AFTER_FIELD(p, fmt.pix);
1157                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1158         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1159                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1160                         break;
1161                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1162                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1163         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1164                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1165                         break;
1166                 CLEAR_AFTER_FIELD(p, fmt.win);
1167                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1168         case V4L2_BUF_TYPE_VBI_CAPTURE:
1169                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1170                         break;
1171                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1172                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1173         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1174                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1175                         break;
1176                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1177                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1178         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1179                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1180                         break;
1181                 CLEAR_AFTER_FIELD(p, fmt.pix);
1182                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1183         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1184                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1185                         break;
1186                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1187                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1188         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1189                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1190                         break;
1191                 CLEAR_AFTER_FIELD(p, fmt.win);
1192                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1193         case V4L2_BUF_TYPE_VBI_OUTPUT:
1194                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1195                         break;
1196                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1197                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1198         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1199                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1200                         break;
1201                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1202                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1203         case V4L2_BUF_TYPE_SDR_CAPTURE:
1204                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1205                         break;
1206                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1207                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1208         }
1209         return -EINVAL;
1210 }
1211
1212 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1213                                 struct file *file, void *fh, void *arg)
1214 {
1215         struct v4l2_format *p = arg;
1216         struct video_device *vfd = video_devdata(file);
1217         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1218         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1219         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1220         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1221
1222         switch (p->type) {
1223         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1224                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1225                         break;
1226                 CLEAR_AFTER_FIELD(p, fmt.pix);
1227                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1228         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1229                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1230                         break;
1231                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1232                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1233         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1234                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1235                         break;
1236                 CLEAR_AFTER_FIELD(p, fmt.win);
1237                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1238         case V4L2_BUF_TYPE_VBI_CAPTURE:
1239                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1240                         break;
1241                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1242                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1243         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1244                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1245                         break;
1246                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1247                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1248         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1249                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1250                         break;
1251                 CLEAR_AFTER_FIELD(p, fmt.pix);
1252                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1253         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1254                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1255                         break;
1256                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1257                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1258         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1259                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1260                         break;
1261                 CLEAR_AFTER_FIELD(p, fmt.win);
1262                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1263         case V4L2_BUF_TYPE_VBI_OUTPUT:
1264                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1265                         break;
1266                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1267                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1268         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1269                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1270                         break;
1271                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1272                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1273         case V4L2_BUF_TYPE_SDR_CAPTURE:
1274                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1275                         break;
1276                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1277                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1278         }
1279         return -EINVAL;
1280 }
1281
1282 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1283                                 struct file *file, void *fh, void *arg)
1284 {
1285         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1286 }
1287
1288 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1289                                 struct file *file, void *fh, void *arg)
1290 {
1291         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1292 }
1293
1294 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1295                                 struct file *file, void *fh, void *arg)
1296 {
1297         struct video_device *vfd = video_devdata(file);
1298         struct v4l2_tuner *p = arg;
1299         int err;
1300
1301         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1302                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1303         err = ops->vidioc_g_tuner(file, fh, p);
1304         if (!err)
1305                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1306         return err;
1307 }
1308
1309 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1310                                 struct file *file, void *fh, void *arg)
1311 {
1312         struct video_device *vfd = video_devdata(file);
1313         struct v4l2_tuner *p = arg;
1314
1315         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1316                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1317         return ops->vidioc_s_tuner(file, fh, p);
1318 }
1319
1320 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1321                                 struct file *file, void *fh, void *arg)
1322 {
1323         struct v4l2_modulator *p = arg;
1324         int err;
1325
1326         err = ops->vidioc_g_modulator(file, fh, p);
1327         if (!err)
1328                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1329         return err;
1330 }
1331
1332 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1333                                 struct file *file, void *fh, void *arg)
1334 {
1335         struct video_device *vfd = video_devdata(file);
1336         struct v4l2_frequency *p = arg;
1337
1338         if (vfd->vfl_type == VFL_TYPE_SDR)
1339                 p->type = V4L2_TUNER_ADC;
1340         else
1341                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1342                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1343         return ops->vidioc_g_frequency(file, fh, p);
1344 }
1345
1346 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1347                                 struct file *file, void *fh, void *arg)
1348 {
1349         struct video_device *vfd = video_devdata(file);
1350         const struct v4l2_frequency *p = arg;
1351         enum v4l2_tuner_type type;
1352
1353         if (vfd->vfl_type == VFL_TYPE_SDR) {
1354                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1355                         return -EINVAL;
1356         } else {
1357                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1358                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1359                 if (type != p->type)
1360                         return -EINVAL;
1361         }
1362         return ops->vidioc_s_frequency(file, fh, p);
1363 }
1364
1365 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1366                                 struct file *file, void *fh, void *arg)
1367 {
1368         struct video_device *vfd = video_devdata(file);
1369         struct v4l2_standard *p = arg;
1370         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1371         unsigned int index = p->index, i, j = 0;
1372         const char *descr = "";
1373
1374         /* Return -ENODATA if the tvnorms for the current input
1375            or output is 0, meaning that it doesn't support this API. */
1376         if (id == 0)
1377                 return -ENODATA;
1378
1379         /* Return norm array in a canonical way */
1380         for (i = 0; i <= index && id; i++) {
1381                 /* last std value in the standards array is 0, so this
1382                    while always ends there since (id & 0) == 0. */
1383                 while ((id & standards[j].std) != standards[j].std)
1384                         j++;
1385                 curr_id = standards[j].std;
1386                 descr = standards[j].descr;
1387                 j++;
1388                 if (curr_id == 0)
1389                         break;
1390                 if (curr_id != V4L2_STD_PAL &&
1391                                 curr_id != V4L2_STD_SECAM &&
1392                                 curr_id != V4L2_STD_NTSC)
1393                         id &= ~curr_id;
1394         }
1395         if (i <= index)
1396                 return -EINVAL;
1397
1398         v4l2_video_std_construct(p, curr_id, descr);
1399         return 0;
1400 }
1401
1402 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1403                                 struct file *file, void *fh, void *arg)
1404 {
1405         struct video_device *vfd = video_devdata(file);
1406         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1407
1408         norm = id & vfd->tvnorms;
1409         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1410                 return -EINVAL;
1411
1412         /* Calls the specific handler */
1413         return ops->vidioc_s_std(file, fh, norm);
1414 }
1415
1416 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1417                                 struct file *file, void *fh, void *arg)
1418 {
1419         struct video_device *vfd = video_devdata(file);
1420         v4l2_std_id *p = arg;
1421
1422         /*
1423          * If no signal is detected, then the driver should return
1424          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1425          * any standards that do not apply removed.
1426          *
1427          * This means that tuners, audio and video decoders can join
1428          * their efforts to improve the standards detection.
1429          */
1430         *p = vfd->tvnorms;
1431         return ops->vidioc_querystd(file, fh, arg);
1432 }
1433
1434 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1435                                 struct file *file, void *fh, void *arg)
1436 {
1437         struct video_device *vfd = video_devdata(file);
1438         struct v4l2_hw_freq_seek *p = arg;
1439         enum v4l2_tuner_type type;
1440
1441         /* s_hw_freq_seek is not supported for SDR for now */
1442         if (vfd->vfl_type == VFL_TYPE_SDR)
1443                 return -EINVAL;
1444
1445         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1446                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1447         if (p->type != type)
1448                 return -EINVAL;
1449         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1450 }
1451
1452 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1453                                 struct file *file, void *fh, void *arg)
1454 {
1455         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1456 }
1457
1458 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1459                                 struct file *file, void *fh, void *arg)
1460 {
1461         struct v4l2_requestbuffers *p = arg;
1462         int ret = check_fmt(file, p->type);
1463
1464         if (ret)
1465                 return ret;
1466
1467         CLEAR_AFTER_FIELD(p, memory);
1468
1469         return ops->vidioc_reqbufs(file, fh, p);
1470 }
1471
1472 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1473                                 struct file *file, void *fh, void *arg)
1474 {
1475         struct v4l2_buffer *p = arg;
1476         int ret = check_fmt(file, p->type);
1477
1478         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1479 }
1480
1481 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1482                                 struct file *file, void *fh, void *arg)
1483 {
1484         struct v4l2_buffer *p = arg;
1485         int ret = check_fmt(file, p->type);
1486
1487         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1488 }
1489
1490 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1491                                 struct file *file, void *fh, void *arg)
1492 {
1493         struct v4l2_buffer *p = arg;
1494         int ret = check_fmt(file, p->type);
1495
1496         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1497 }
1498
1499 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1500                                 struct file *file, void *fh, void *arg)
1501 {
1502         struct v4l2_create_buffers *create = arg;
1503         int ret = check_fmt(file, create->format.type);
1504
1505         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1506 }
1507
1508 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1509                                 struct file *file, void *fh, void *arg)
1510 {
1511         struct v4l2_buffer *b = arg;
1512         int ret = check_fmt(file, b->type);
1513
1514         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1515 }
1516
1517 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1518                                 struct file *file, void *fh, void *arg)
1519 {
1520         struct v4l2_streamparm *p = arg;
1521         v4l2_std_id std;
1522         int ret = check_fmt(file, p->type);
1523
1524         if (ret)
1525                 return ret;
1526         if (ops->vidioc_g_parm)
1527                 return ops->vidioc_g_parm(file, fh, p);
1528         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1529             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1530                 return -EINVAL;
1531         p->parm.capture.readbuffers = 2;
1532         ret = ops->vidioc_g_std(file, fh, &std);
1533         if (ret == 0)
1534                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1535         return ret;
1536 }
1537
1538 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1539                                 struct file *file, void *fh, void *arg)
1540 {
1541         struct v4l2_streamparm *p = arg;
1542         int ret = check_fmt(file, p->type);
1543
1544         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1545 }
1546
1547 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1548                                 struct file *file, void *fh, void *arg)
1549 {
1550         struct video_device *vfd = video_devdata(file);
1551         struct v4l2_queryctrl *p = arg;
1552         struct v4l2_fh *vfh =
1553                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1554
1555         if (vfh && vfh->ctrl_handler)
1556                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1557         if (vfd->ctrl_handler)
1558                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1559         if (ops->vidioc_queryctrl)
1560                 return ops->vidioc_queryctrl(file, fh, p);
1561         return -ENOTTY;
1562 }
1563
1564 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1565                                 struct file *file, void *fh, void *arg)
1566 {
1567         struct video_device *vfd = video_devdata(file);
1568         struct v4l2_querymenu *p = arg;
1569         struct v4l2_fh *vfh =
1570                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1571
1572         if (vfh && vfh->ctrl_handler)
1573                 return v4l2_querymenu(vfh->ctrl_handler, p);
1574         if (vfd->ctrl_handler)
1575                 return v4l2_querymenu(vfd->ctrl_handler, p);
1576         if (ops->vidioc_querymenu)
1577                 return ops->vidioc_querymenu(file, fh, p);
1578         return -ENOTTY;
1579 }
1580
1581 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1582                                 struct file *file, void *fh, void *arg)
1583 {
1584         struct video_device *vfd = video_devdata(file);
1585         struct v4l2_control *p = arg;
1586         struct v4l2_fh *vfh =
1587                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1588         struct v4l2_ext_controls ctrls;
1589         struct v4l2_ext_control ctrl;
1590
1591         if (vfh && vfh->ctrl_handler)
1592                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1593         if (vfd->ctrl_handler)
1594                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1595         if (ops->vidioc_g_ctrl)
1596                 return ops->vidioc_g_ctrl(file, fh, p);
1597         if (ops->vidioc_g_ext_ctrls == NULL)
1598                 return -ENOTTY;
1599
1600         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1601         ctrls.count = 1;
1602         ctrls.controls = &ctrl;
1603         ctrl.id = p->id;
1604         ctrl.value = p->value;
1605         if (check_ext_ctrls(&ctrls, 1)) {
1606                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1607
1608                 if (ret == 0)
1609                         p->value = ctrl.value;
1610                 return ret;
1611         }
1612         return -EINVAL;
1613 }
1614
1615 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1616                                 struct file *file, void *fh, void *arg)
1617 {
1618         struct video_device *vfd = video_devdata(file);
1619         struct v4l2_control *p = arg;
1620         struct v4l2_fh *vfh =
1621                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1622         struct v4l2_ext_controls ctrls;
1623         struct v4l2_ext_control ctrl;
1624
1625         if (vfh && vfh->ctrl_handler)
1626                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1627         if (vfd->ctrl_handler)
1628                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1629         if (ops->vidioc_s_ctrl)
1630                 return ops->vidioc_s_ctrl(file, fh, p);
1631         if (ops->vidioc_s_ext_ctrls == NULL)
1632                 return -ENOTTY;
1633
1634         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1635         ctrls.count = 1;
1636         ctrls.controls = &ctrl;
1637         ctrl.id = p->id;
1638         ctrl.value = p->value;
1639         if (check_ext_ctrls(&ctrls, 1))
1640                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1641         return -EINVAL;
1642 }
1643
1644 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1645                                 struct file *file, void *fh, void *arg)
1646 {
1647         struct video_device *vfd = video_devdata(file);
1648         struct v4l2_ext_controls *p = arg;
1649         struct v4l2_fh *vfh =
1650                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1651
1652         p->error_idx = p->count;
1653         if (vfh && vfh->ctrl_handler)
1654                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1655         if (vfd->ctrl_handler)
1656                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1657         if (ops->vidioc_g_ext_ctrls == NULL)
1658                 return -ENOTTY;
1659         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1660                                         -EINVAL;
1661 }
1662
1663 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1664                                 struct file *file, void *fh, void *arg)
1665 {
1666         struct video_device *vfd = video_devdata(file);
1667         struct v4l2_ext_controls *p = arg;
1668         struct v4l2_fh *vfh =
1669                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1670
1671         p->error_idx = p->count;
1672         if (vfh && vfh->ctrl_handler)
1673                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1674         if (vfd->ctrl_handler)
1675                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1676         if (ops->vidioc_s_ext_ctrls == NULL)
1677                 return -ENOTTY;
1678         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1679                                         -EINVAL;
1680 }
1681
1682 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1683                                 struct file *file, void *fh, void *arg)
1684 {
1685         struct video_device *vfd = video_devdata(file);
1686         struct v4l2_ext_controls *p = arg;
1687         struct v4l2_fh *vfh =
1688                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1689
1690         p->error_idx = p->count;
1691         if (vfh && vfh->ctrl_handler)
1692                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1693         if (vfd->ctrl_handler)
1694                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1695         if (ops->vidioc_try_ext_ctrls == NULL)
1696                 return -ENOTTY;
1697         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1698                                         -EINVAL;
1699 }
1700
1701 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1702                                 struct file *file, void *fh, void *arg)
1703 {
1704         struct v4l2_crop *p = arg;
1705         struct v4l2_selection s = {
1706                 .type = p->type,
1707         };
1708         int ret;
1709
1710         if (ops->vidioc_g_crop)
1711                 return ops->vidioc_g_crop(file, fh, p);
1712         /* simulate capture crop using selection api */
1713
1714         /* crop means compose for output devices */
1715         if (V4L2_TYPE_IS_OUTPUT(p->type))
1716                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1717         else
1718                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1719
1720         ret = ops->vidioc_g_selection(file, fh, &s);
1721
1722         /* copying results to old structure on success */
1723         if (!ret)
1724                 p->c = s.r;
1725         return ret;
1726 }
1727
1728 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1729                                 struct file *file, void *fh, void *arg)
1730 {
1731         struct v4l2_crop *p = arg;
1732         struct v4l2_selection s = {
1733                 .type = p->type,
1734                 .r = p->c,
1735         };
1736
1737         if (ops->vidioc_s_crop)
1738                 return ops->vidioc_s_crop(file, fh, p);
1739         /* simulate capture crop using selection api */
1740
1741         /* crop means compose for output devices */
1742         if (V4L2_TYPE_IS_OUTPUT(p->type))
1743                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1744         else
1745                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1746
1747         return ops->vidioc_s_selection(file, fh, &s);
1748 }
1749
1750 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1751                                 struct file *file, void *fh, void *arg)
1752 {
1753         struct v4l2_cropcap *p = arg;
1754         struct v4l2_selection s = { .type = p->type };
1755         int ret;
1756
1757         if (ops->vidioc_cropcap)
1758                 return ops->vidioc_cropcap(file, fh, p);
1759
1760         /* obtaining bounds */
1761         if (V4L2_TYPE_IS_OUTPUT(p->type))
1762                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1763         else
1764                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1765
1766         ret = ops->vidioc_g_selection(file, fh, &s);
1767         if (ret)
1768                 return ret;
1769         p->bounds = s.r;
1770
1771         /* obtaining defrect */
1772         if (V4L2_TYPE_IS_OUTPUT(p->type))
1773                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1774         else
1775                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1776
1777         ret = ops->vidioc_g_selection(file, fh, &s);
1778         if (ret)
1779                 return ret;
1780         p->defrect = s.r;
1781
1782         /* setting trivial pixelaspect */
1783         p->pixelaspect.numerator = 1;
1784         p->pixelaspect.denominator = 1;
1785         return 0;
1786 }
1787
1788 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1789                                 struct file *file, void *fh, void *arg)
1790 {
1791         struct video_device *vfd = video_devdata(file);
1792         int ret;
1793
1794         if (vfd->v4l2_dev)
1795                 pr_info("%s: =================  START STATUS  =================\n",
1796                         vfd->v4l2_dev->name);
1797         ret = ops->vidioc_log_status(file, fh);
1798         if (vfd->v4l2_dev)
1799                 pr_info("%s: ==================  END STATUS  ==================\n",
1800                         vfd->v4l2_dev->name);
1801         return ret;
1802 }
1803
1804 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1805                                 struct file *file, void *fh, void *arg)
1806 {
1807 #ifdef CONFIG_VIDEO_ADV_DEBUG
1808         struct v4l2_dbg_register *p = arg;
1809         struct video_device *vfd = video_devdata(file);
1810         struct v4l2_subdev *sd;
1811         int idx = 0;
1812
1813         if (!capable(CAP_SYS_ADMIN))
1814                 return -EPERM;
1815         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1816                 if (vfd->v4l2_dev == NULL)
1817                         return -EINVAL;
1818                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1819                         if (p->match.addr == idx++)
1820                                 return v4l2_subdev_call(sd, core, g_register, p);
1821                 return -EINVAL;
1822         }
1823         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1824             (ops->vidioc_g_chip_info || p->match.addr == 0))
1825                 return ops->vidioc_g_register(file, fh, p);
1826         return -EINVAL;
1827 #else
1828         return -ENOTTY;
1829 #endif
1830 }
1831
1832 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1833                                 struct file *file, void *fh, void *arg)
1834 {
1835 #ifdef CONFIG_VIDEO_ADV_DEBUG
1836         const struct v4l2_dbg_register *p = arg;
1837         struct video_device *vfd = video_devdata(file);
1838         struct v4l2_subdev *sd;
1839         int idx = 0;
1840
1841         if (!capable(CAP_SYS_ADMIN))
1842                 return -EPERM;
1843         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1844                 if (vfd->v4l2_dev == NULL)
1845                         return -EINVAL;
1846                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1847                         if (p->match.addr == idx++)
1848                                 return v4l2_subdev_call(sd, core, s_register, p);
1849                 return -EINVAL;
1850         }
1851         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1852             (ops->vidioc_g_chip_info || p->match.addr == 0))
1853                 return ops->vidioc_s_register(file, fh, p);
1854         return -EINVAL;
1855 #else
1856         return -ENOTTY;
1857 #endif
1858 }
1859
1860 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1861                                 struct file *file, void *fh, void *arg)
1862 {
1863 #ifdef CONFIG_VIDEO_ADV_DEBUG
1864         struct video_device *vfd = video_devdata(file);
1865         struct v4l2_dbg_chip_info *p = arg;
1866         struct v4l2_subdev *sd;
1867         int idx = 0;
1868
1869         switch (p->match.type) {
1870         case V4L2_CHIP_MATCH_BRIDGE:
1871                 if (ops->vidioc_s_register)
1872                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1873                 if (ops->vidioc_g_register)
1874                         p->flags |= V4L2_CHIP_FL_READABLE;
1875                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1876                 if (ops->vidioc_g_chip_info)
1877                         return ops->vidioc_g_chip_info(file, fh, arg);
1878                 if (p->match.addr)
1879                         return -EINVAL;
1880                 return 0;
1881
1882         case V4L2_CHIP_MATCH_SUBDEV:
1883                 if (vfd->v4l2_dev == NULL)
1884                         break;
1885                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1886                         if (p->match.addr != idx++)
1887                                 continue;
1888                         if (sd->ops->core && sd->ops->core->s_register)
1889                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
1890                         if (sd->ops->core && sd->ops->core->g_register)
1891                                 p->flags |= V4L2_CHIP_FL_READABLE;
1892                         strlcpy(p->name, sd->name, sizeof(p->name));
1893                         return 0;
1894                 }
1895                 break;
1896         }
1897         return -EINVAL;
1898 #else
1899         return -ENOTTY;
1900 #endif
1901 }
1902
1903 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1904                                 struct file *file, void *fh, void *arg)
1905 {
1906         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1907 }
1908
1909 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1910                                 struct file *file, void *fh, void *arg)
1911 {
1912         return ops->vidioc_subscribe_event(fh, arg);
1913 }
1914
1915 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1916                                 struct file *file, void *fh, void *arg)
1917 {
1918         return ops->vidioc_unsubscribe_event(fh, arg);
1919 }
1920
1921 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1922                                 struct file *file, void *fh, void *arg)
1923 {
1924         struct v4l2_sliced_vbi_cap *p = arg;
1925         int ret = check_fmt(file, p->type);
1926
1927         if (ret)
1928                 return ret;
1929
1930         /* Clear up to type, everything after type is zeroed already */
1931         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1932
1933         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1934 }
1935
1936 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1937                                 struct file *file, void *fh, void *arg)
1938 {
1939         struct video_device *vfd = video_devdata(file);
1940         struct v4l2_frequency_band *p = arg;
1941         enum v4l2_tuner_type type;
1942         int err;
1943
1944         if (vfd->vfl_type == VFL_TYPE_SDR) {
1945                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1946                         return -EINVAL;
1947                 type = p->type;
1948         } else {
1949                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1950                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1951                 if (type != p->type)
1952                         return -EINVAL;
1953         }
1954         if (ops->vidioc_enum_freq_bands)
1955                 return ops->vidioc_enum_freq_bands(file, fh, p);
1956         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1957                 struct v4l2_tuner t = {
1958                         .index = p->tuner,
1959                         .type = type,
1960                 };
1961
1962                 if (p->index)
1963                         return -EINVAL;
1964                 err = ops->vidioc_g_tuner(file, fh, &t);
1965                 if (err)
1966                         return err;
1967                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1968                 p->rangelow = t.rangelow;
1969                 p->rangehigh = t.rangehigh;
1970                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1971                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1972                 return 0;
1973         }
1974         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1975                 struct v4l2_modulator m = {
1976                         .index = p->tuner,
1977                 };
1978
1979                 if (type != V4L2_TUNER_RADIO)
1980                         return -EINVAL;
1981                 if (p->index)
1982                         return -EINVAL;
1983                 err = ops->vidioc_g_modulator(file, fh, &m);
1984                 if (err)
1985                         return err;
1986                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1987                 p->rangelow = m.rangelow;
1988                 p->rangehigh = m.rangehigh;
1989                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1990                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1991                 return 0;
1992         }
1993         return -ENOTTY;
1994 }
1995
1996 struct v4l2_ioctl_info {
1997         unsigned int ioctl;
1998         u32 flags;
1999         const char * const name;
2000         union {
2001                 u32 offset;
2002                 int (*func)(const struct v4l2_ioctl_ops *ops,
2003                                 struct file *file, void *fh, void *p);
2004         } u;
2005         void (*debug)(const void *arg, bool write_only);
2006 };
2007
2008 /* This control needs a priority check */
2009 #define INFO_FL_PRIO    (1 << 0)
2010 /* This control can be valid if the filehandle passes a control handler. */
2011 #define INFO_FL_CTRL    (1 << 1)
2012 /* This is a standard ioctl, no need for special code */
2013 #define INFO_FL_STD     (1 << 2)
2014 /* This is ioctl has its own function */
2015 #define INFO_FL_FUNC    (1 << 3)
2016 /* Queuing ioctl */
2017 #define INFO_FL_QUEUE   (1 << 4)
2018 /* Zero struct from after the field to the end */
2019 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2020         ((offsetof(struct v4l2_struct, field) +                 \
2021           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2022 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2023
2024 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2025         [_IOC_NR(_ioctl)] = {                                           \
2026                 .ioctl = _ioctl,                                        \
2027                 .flags = _flags | INFO_FL_STD,                          \
2028                 .name = #_ioctl,                                        \
2029                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2030                 .debug = _debug,                                        \
2031         }
2032
2033 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2034         [_IOC_NR(_ioctl)] = {                                           \
2035                 .ioctl = _ioctl,                                        \
2036                 .flags = _flags | INFO_FL_FUNC,                         \
2037                 .name = #_ioctl,                                        \
2038                 .u.func = _func,                                        \
2039                 .debug = _debug,                                        \
2040         }
2041
2042 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2043         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2044         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2045         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2046         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2047         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2048         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2049         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2050         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2051         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2052         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2053         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2054         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2055         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2056         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2057         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2058         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2059         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2060         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2061         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2062         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2063         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2064         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2065         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2066         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2067         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2068         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2069         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2070         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2071         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2072         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2073         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_CLEAR(v4l2_edid, edid)),
2074         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_edid, edid)),
2075         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2076         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2077         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2078         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2079         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2080         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2081         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2082         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2083         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2084         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2085         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2086         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2087         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2088         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2089         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2090         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2091         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2092         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2093         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2094         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2095         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2096         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2097         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)),
2098         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2099         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2100         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2101         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2102         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2103         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2104         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2105         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2106         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2107         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2108         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2109         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2110         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2111         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2112         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2113         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2114         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2115         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2116         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2117         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2118         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2119         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2120         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2121         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2122         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2123         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)),
2124 };
2125 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2126
2127 bool v4l2_is_known_ioctl(unsigned int cmd)
2128 {
2129         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2130                 return false;
2131         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2132 }
2133
2134 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2135 {
2136         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2137                 return vdev->lock;
2138         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2139                 return NULL;
2140         if (vdev->queue && vdev->queue->lock &&
2141                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2142                 return vdev->queue->lock;
2143         return vdev->lock;
2144 }
2145
2146 /* Common ioctl debug function. This function can be used by
2147    external ioctl messages as well as internal V4L ioctl */
2148 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2149 {
2150         const char *dir, *type;
2151
2152         if (prefix)
2153                 printk(KERN_DEBUG "%s: ", prefix);
2154
2155         switch (_IOC_TYPE(cmd)) {
2156         case 'd':
2157                 type = "v4l2_int";
2158                 break;
2159         case 'V':
2160                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2161                         type = "v4l2";
2162                         break;
2163                 }
2164                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2165                 return;
2166         default:
2167                 type = "unknown";
2168                 break;
2169         }
2170
2171         switch (_IOC_DIR(cmd)) {
2172         case _IOC_NONE:              dir = "--"; break;
2173         case _IOC_READ:              dir = "r-"; break;
2174         case _IOC_WRITE:             dir = "-w"; break;
2175         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2176         default:                     dir = "*ERR*"; break;
2177         }
2178         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2179                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2180 }
2181 EXPORT_SYMBOL(v4l_printk_ioctl);
2182
2183 static long __video_do_ioctl(struct file *file,
2184                 unsigned int cmd, void *arg)
2185 {
2186         struct video_device *vfd = video_devdata(file);
2187         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2188         bool write_only = false;
2189         struct v4l2_ioctl_info default_info;
2190         const struct v4l2_ioctl_info *info;
2191         void *fh = file->private_data;
2192         struct v4l2_fh *vfh = NULL;
2193         int use_fh_prio = 0;
2194         int debug = vfd->debug;
2195         long ret = -ENOTTY;
2196
2197         if (ops == NULL) {
2198                 pr_warn("%s: has no ioctl_ops.\n",
2199                                 video_device_node_name(vfd));
2200                 return ret;
2201         }
2202
2203         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2204                 vfh = file->private_data;
2205                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2206         }
2207
2208         if (v4l2_is_known_ioctl(cmd)) {
2209                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2210
2211                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2212                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2213                         goto done;
2214
2215                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2216                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2217                         if (ret)
2218                                 goto done;
2219                 }
2220         } else {
2221                 default_info.ioctl = cmd;
2222                 default_info.flags = 0;
2223                 default_info.debug = v4l_print_default;
2224                 info = &default_info;
2225         }
2226
2227         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2228         if (info->flags & INFO_FL_STD) {
2229                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2230                 const void *p = vfd->ioctl_ops;
2231                 const vidioc_op *vidioc = p + info->u.offset;
2232
2233                 ret = (*vidioc)(file, fh, arg);
2234         } else if (info->flags & INFO_FL_FUNC) {
2235                 ret = info->u.func(ops, file, fh, arg);
2236         } else if (!ops->vidioc_default) {
2237                 ret = -ENOTTY;
2238         } else {
2239                 ret = ops->vidioc_default(file, fh,
2240                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2241                         cmd, arg);
2242         }
2243
2244 done:
2245         if (debug) {
2246                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2247                 if (ret < 0)
2248                         pr_cont(": error %ld", ret);
2249                 if (debug == V4L2_DEBUG_IOCTL)
2250                         pr_cont("\n");
2251                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2252                         info->debug(arg, write_only);
2253                 else {
2254                         pr_cont(": ");
2255                         info->debug(arg, write_only);
2256                 }
2257         }
2258
2259         return ret;
2260 }
2261
2262 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2263                             void __user **user_ptr, void ***kernel_ptr)
2264 {
2265         int ret = 0;
2266
2267         switch (cmd) {
2268         case VIDIOC_PREPARE_BUF:
2269         case VIDIOC_QUERYBUF:
2270         case VIDIOC_QBUF:
2271         case VIDIOC_DQBUF: {
2272                 struct v4l2_buffer *buf = parg;
2273
2274                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2275                         if (buf->length > VIDEO_MAX_PLANES) {
2276                                 ret = -EINVAL;
2277                                 break;
2278                         }
2279                         *user_ptr = (void __user *)buf->m.planes;
2280                         *kernel_ptr = (void **)&buf->m.planes;
2281                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2282                         ret = 1;
2283                 }
2284                 break;
2285         }
2286
2287         case VIDIOC_G_EDID:
2288         case VIDIOC_S_EDID: {
2289                 struct v4l2_edid *edid = parg;
2290
2291                 if (edid->blocks) {
2292                         if (edid->blocks > 256) {
2293                                 ret = -EINVAL;
2294                                 break;
2295                         }
2296                         *user_ptr = (void __user *)edid->edid;
2297                         *kernel_ptr = (void **)&edid->edid;
2298                         *array_size = edid->blocks * 128;
2299                         ret = 1;
2300                 }
2301                 break;
2302         }
2303
2304         case VIDIOC_S_EXT_CTRLS:
2305         case VIDIOC_G_EXT_CTRLS:
2306         case VIDIOC_TRY_EXT_CTRLS: {
2307                 struct v4l2_ext_controls *ctrls = parg;
2308
2309                 if (ctrls->count != 0) {
2310                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2311                                 ret = -EINVAL;
2312                                 break;
2313                         }
2314                         *user_ptr = (void __user *)ctrls->controls;
2315                         *kernel_ptr = (void **)&ctrls->controls;
2316                         *array_size = sizeof(struct v4l2_ext_control)
2317                                     * ctrls->count;
2318                         ret = 1;
2319                 }
2320                 break;
2321         }
2322         }
2323
2324         return ret;
2325 }
2326
2327 long
2328 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2329                v4l2_kioctl func)
2330 {
2331         char    sbuf[128];
2332         void    *mbuf = NULL;
2333         void    *parg = (void *)arg;
2334         long    err  = -EINVAL;
2335         bool    has_array_args;
2336         size_t  array_size = 0;
2337         void __user *user_ptr = NULL;
2338         void    **kernel_ptr = NULL;
2339
2340         /*  Copy arguments into temp kernel buffer  */
2341         if (_IOC_DIR(cmd) != _IOC_NONE) {
2342                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2343                         parg = sbuf;
2344                 } else {
2345                         /* too big to allocate from stack */
2346                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2347                         if (NULL == mbuf)
2348                                 return -ENOMEM;
2349                         parg = mbuf;
2350                 }
2351
2352                 err = -EFAULT;
2353                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2354                         unsigned int n = _IOC_SIZE(cmd);
2355
2356                         /*
2357                          * In some cases, only a few fields are used as input,
2358                          * i.e. when the app sets "index" and then the driver
2359                          * fills in the rest of the structure for the thing
2360                          * with that index.  We only need to copy up the first
2361                          * non-input field.
2362                          */
2363                         if (v4l2_is_known_ioctl(cmd)) {
2364                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2365                                 if (flags & INFO_FL_CLEAR_MASK)
2366                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2367                         }
2368
2369                         if (copy_from_user(parg, (void __user *)arg, n))
2370                                 goto out;
2371
2372                         /* zero out anything we don't copy from userspace */
2373                         if (n < _IOC_SIZE(cmd))
2374                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2375                 } else {
2376                         /* read-only ioctl */
2377                         memset(parg, 0, _IOC_SIZE(cmd));
2378                 }
2379         }
2380
2381         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2382         if (err < 0)
2383                 goto out;
2384         has_array_args = err;
2385
2386         if (has_array_args) {
2387                 /*
2388                  * When adding new types of array args, make sure that the
2389                  * parent argument to ioctl (which contains the pointer to the
2390                  * array) fits into sbuf (so that mbuf will still remain
2391                  * unused up to here).
2392                  */
2393                 mbuf = kmalloc(array_size, GFP_KERNEL);
2394                 err = -ENOMEM;
2395                 if (NULL == mbuf)
2396                         goto out_array_args;
2397                 err = -EFAULT;
2398                 if (copy_from_user(mbuf, user_ptr, array_size))
2399                         goto out_array_args;
2400                 *kernel_ptr = mbuf;
2401         }
2402
2403         /* Handles IOCTL */
2404         err = func(file, cmd, parg);
2405         if (err == -ENOIOCTLCMD)
2406                 err = -ENOTTY;
2407         if (err == 0) {
2408                 if (cmd == VIDIOC_DQBUF)
2409                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2410                 else if (cmd == VIDIOC_QBUF)
2411                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2412         }
2413
2414         if (has_array_args) {
2415                 *kernel_ptr = (void __force *)user_ptr;
2416                 if (copy_to_user(user_ptr, mbuf, array_size))
2417                         err = -EFAULT;
2418                 goto out_array_args;
2419         }
2420         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2421            results that must be returned. */
2422         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2423                 goto out;
2424
2425 out_array_args:
2426         /*  Copy results into user buffer  */
2427         switch (_IOC_DIR(cmd)) {
2428         case _IOC_READ:
2429         case (_IOC_WRITE | _IOC_READ):
2430                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2431                         err = -EFAULT;
2432                 break;
2433         }
2434
2435 out:
2436         kfree(mbuf);
2437         return err;
2438 }
2439 EXPORT_SYMBOL(video_usercopy);
2440
2441 long video_ioctl2(struct file *file,
2442                unsigned int cmd, unsigned long arg)
2443 {
2444         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2445 }
2446 EXPORT_SYMBOL(video_ioctl2);