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