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 /* Zero out the end of the struct pointed to by p.  Everything after, but
  32  * not including, the specified field is cleared. */
  33 #define CLEAR_AFTER_FIELD(p, field) \
  34         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  35         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  36
  37 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  38
  39 struct std_descr {
  40         v4l2_std_id std;
  41         const char *descr;
  42 };
  43
  44 static const struct std_descr standards[] = {
  45         { V4L2_STD_NTSC,        "NTSC"      },
  46         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  47         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  48         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  49         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  50         { V4L2_STD_PAL,         "PAL"       },
  51         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  52         { V4L2_STD_PAL_B,       "PAL-B"     },
  53         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  54         { V4L2_STD_PAL_G,       "PAL-G"     },
  55         { V4L2_STD_PAL_H,       "PAL-H"     },
  56         { V4L2_STD_PAL_I,       "PAL-I"     },
  57         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  58         { V4L2_STD_PAL_D,       "PAL-D"     },
  59         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  60         { V4L2_STD_PAL_K,       "PAL-K"     },
  61         { V4L2_STD_PAL_M,       "PAL-M"     },
  62         { V4L2_STD_PAL_N,       "PAL-N"     },
  63         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  64         { V4L2_STD_PAL_60,      "PAL-60"    },
  65         { V4L2_STD_SECAM,       "SECAM"     },
  66         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  67         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  68         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  69         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  70         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  71         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  72         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  73         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  74         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  75         { 0,                    "Unknown"   }
  76 };
  77
  78 /* video4linux standard ID conversion to standard name
  79  */
  80 const char *v4l2_norm_to_name(v4l2_std_id id)
  81 {
  82         u32 myid = id;
  83         int i;
  84
  85         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  86            64 bit comparations. So, on that architecture, with some gcc
  87            variants, compilation fails. Currently, the max value is 30bit wide.
  88          */
  89         BUG_ON(myid != id);
  90
  91         for (i = 0; standards[i].std; i++)
  92                 if (myid == standards[i].std)
  93                         break;
  94         return standards[i].descr;
  95 }
  96 EXPORT_SYMBOL(v4l2_norm_to_name);
  97
  98 /* Returns frame period for the given standard */
  99 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 100 {
 101         if (id & V4L2_STD_525_60) {
 102                 frameperiod->numerator = 1001;
 103                 frameperiod->denominator = 30000;
 104         } else {
 105                 frameperiod->numerator = 1;
 106                 frameperiod->denominator = 25;
 107         }
 108 }
 109 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 110
 111 /* Fill in the fields of a v4l2_standard structure according to the
 112    'id' and 'transmission' parameters.  Returns negative on error.  */
 113 int v4l2_video_std_construct(struct v4l2_standard *vs,
 114                              int id, const char *name)
 115 {
 116         vs->id = id;
 117         v4l2_video_std_frame_period(id, &vs->frameperiod);
 118         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 119         strlcpy(vs->name, name, sizeof(vs->name));
 120         return 0;
 121 }
 122 EXPORT_SYMBOL(v4l2_video_std_construct);
 123
 124 /* ----------------------------------------------------------------- */
 125 /* some arrays for pretty-printing debug messages of enum types      */
 126
 127 const char *v4l2_field_names[] = {
 128         [V4L2_FIELD_ANY]        = "any",
 129         [V4L2_FIELD_NONE]       = "none",
 130         [V4L2_FIELD_TOP]        = "top",
 131         [V4L2_FIELD_BOTTOM]     = "bottom",
 132         [V4L2_FIELD_INTERLACED] = "interlaced",
 133         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 134         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 135         [V4L2_FIELD_ALTERNATE]  = "alternate",
 136         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 137         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 138 };
 139 EXPORT_SYMBOL(v4l2_field_names);
 140
 141 const char *v4l2_type_names[] = {
 142         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 143         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 144         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 145         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 146         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 147         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 148         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 149         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 150         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 151         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 152 };
 153 EXPORT_SYMBOL(v4l2_type_names);
 154
 155 static const char *v4l2_memory_names[] = {
 156         [V4L2_MEMORY_MMAP]    = "mmap",
 157         [V4L2_MEMORY_USERPTR] = "userptr",
 158         [V4L2_MEMORY_OVERLAY] = "overlay",
 159         [V4L2_MEMORY_DMABUF] = "dmabuf",
 160 };
 161
 162 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 163
 164 /* ------------------------------------------------------------------ */
 165 /* debug help functions                                               */
 166
 167 static void v4l_print_querycap(const void *arg, bool write_only)
 168 {
 169         const struct v4l2_capability *p = arg;
 170
 171         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 172                 "capabilities=0x%08x, device_caps=0x%08x\n",
 173                 (int)sizeof(p->driver), p->driver,
 174                 (int)sizeof(p->card), p->card,
 175                 (int)sizeof(p->bus_info), p->bus_info,
 176                 p->version, p->capabilities, p->device_caps);
 177 }
 178
 179 static void v4l_print_enuminput(const void *arg, bool write_only)
 180 {
 181         const struct v4l2_input *p = arg;
 182
 183         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 184                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 185                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 186                 p->tuner, (unsigned long long)p->std, p->status,
 187                 p->capabilities);
 188 }
 189
 190 static void v4l_print_enumoutput(const void *arg, bool write_only)
 191 {
 192         const struct v4l2_output *p = arg;
 193
 194         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 195                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 196                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 197                 p->modulator, (unsigned long long)p->std, p->capabilities);
 198 }
 199
 200 static void v4l_print_audio(const void *arg, bool write_only)
 201 {
 202         const struct v4l2_audio *p = arg;
 203
 204         if (write_only)
 205                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 206         else
 207                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 208                         p->index, (int)sizeof(p->name), p->name,
 209                         p->capability, p->mode);
 210 }
 211
 212 static void v4l_print_audioout(const void *arg, bool write_only)
 213 {
 214         const struct v4l2_audioout *p = arg;
 215
 216         if (write_only)
 217                 pr_cont("index=%u\n", p->index);
 218         else
 219                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 220                         p->index, (int)sizeof(p->name), p->name,
 221                         p->capability, p->mode);
 222 }
 223
 224 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 225 {
 226         const struct v4l2_fmtdesc *p = arg;
 227
 228         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 229                 p->index, prt_names(p->type, v4l2_type_names),
 230                 p->flags, (p->pixelformat & 0xff),
 231                 (p->pixelformat >>  8) & 0xff,
 232                 (p->pixelformat >> 16) & 0xff,
 233                 (p->pixelformat >> 24) & 0xff,
 234                 (int)sizeof(p->description), p->description);
 235 }
 236
 237 static void v4l_print_format(const void *arg, bool write_only)
 238 {
 239         const struct v4l2_format *p = arg;
 240         const struct v4l2_pix_format *pix;
 241         const struct v4l2_pix_format_mplane *mp;
 242         const struct v4l2_vbi_format *vbi;
 243         const struct v4l2_sliced_vbi_format *sliced;
 244         const struct v4l2_window *win;
 245         unsigned i;
 246
 247         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 248         switch (p->type) {
 249         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 250         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 251                 pix = &p->fmt.pix;
 252                 pr_cont(", width=%u, height=%u, "
 253                         "pixelformat=%c%c%c%c, field=%s, "
 254                         "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 255                         pix->width, pix->height,
 256                         (pix->pixelformat & 0xff),
 257                         (pix->pixelformat >>  8) & 0xff,
 258                         (pix->pixelformat >> 16) & 0xff,
 259                         (pix->pixelformat >> 24) & 0xff,
 260                         prt_names(pix->field, v4l2_field_names),
 261                         pix->bytesperline, pix->sizeimage,
 262                         pix->colorspace);
 263                 break;
 264         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 265         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 266                 mp = &p->fmt.pix_mp;
 267                 pr_cont(", width=%u, height=%u, "
 268                         "format=%c%c%c%c, field=%s, "
 269                         "colorspace=%d, num_planes=%u\n",
 270                         mp->width, mp->height,
 271                         (mp->pixelformat & 0xff),
 272                         (mp->pixelformat >>  8) & 0xff,
 273                         (mp->pixelformat >> 16) & 0xff,
 274                         (mp->pixelformat >> 24) & 0xff,
 275                         prt_names(mp->field, v4l2_field_names),
 276                         mp->colorspace, mp->num_planes);
 277                 for (i = 0; i < mp->num_planes; i++)
 278                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 279                                         mp->plane_fmt[i].bytesperline,
 280                                         mp->plane_fmt[i].sizeimage);
 281                 break;
 282         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 283         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 284                 win = &p->fmt.win;
 285                 /* Note: we can't print the clip list here since the clips
 286                  * pointer is a userspace pointer, not a kernelspace
 287                  * pointer. */
 288                 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",
 289                         win->w.width, win->w.height, win->w.left, win->w.top,
 290                         prt_names(win->field, v4l2_field_names),
 291                         win->chromakey, win->clipcount, win->clips,
 292                         win->bitmap, win->global_alpha);
 293                 break;
 294         case V4L2_BUF_TYPE_VBI_CAPTURE:
 295         case V4L2_BUF_TYPE_VBI_OUTPUT:
 296                 vbi = &p->fmt.vbi;
 297                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 298                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 299                         vbi->sampling_rate, vbi->offset,
 300                         vbi->samples_per_line,
 301                         (vbi->sample_format & 0xff),
 302                         (vbi->sample_format >>  8) & 0xff,
 303                         (vbi->sample_format >> 16) & 0xff,
 304                         (vbi->sample_format >> 24) & 0xff,
 305                         vbi->start[0], vbi->start[1],
 306                         vbi->count[0], vbi->count[1]);
 307                 break;
 308         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 309         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 310                 sliced = &p->fmt.sliced;
 311                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 312                                 sliced->service_set, sliced->io_size);
 313                 for (i = 0; i < 24; i++)
 314                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 315                                 sliced->service_lines[0][i],
 316                                 sliced->service_lines[1][i]);
 317                 break;
 318         }
 319 }
 320
 321 static void v4l_print_framebuffer(const void *arg, bool write_only)
 322 {
 323         const struct v4l2_framebuffer *p = arg;
 324
 325         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 326                 "height=%u, pixelformat=%c%c%c%c, "
 327                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 328                         p->capability, p->flags, p->base,
 329                         p->fmt.width, p->fmt.height,
 330                         (p->fmt.pixelformat & 0xff),
 331                         (p->fmt.pixelformat >>  8) & 0xff,
 332                         (p->fmt.pixelformat >> 16) & 0xff,
 333                         (p->fmt.pixelformat >> 24) & 0xff,
 334                         p->fmt.bytesperline, p->fmt.sizeimage,
 335                         p->fmt.colorspace);
 336 }
 337
 338 static void v4l_print_buftype(const void *arg, bool write_only)
 339 {
 340         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 341 }
 342
 343 static void v4l_print_modulator(const void *arg, bool write_only)
 344 {
 345         const struct v4l2_modulator *p = arg;
 346
 347         if (write_only)
 348                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 349         else
 350                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 351                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 352                         p->index, (int)sizeof(p->name), p->name, p->capability,
 353                         p->rangelow, p->rangehigh, p->txsubchans);
 354 }
 355
 356 static void v4l_print_tuner(const void *arg, bool write_only)
 357 {
 358         const struct v4l2_tuner *p = arg;
 359
 360         if (write_only)
 361                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 362         else
 363                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 364                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 365                         "rxsubchans=0x%x, audmode=%u\n",
 366                         p->index, (int)sizeof(p->name), p->name, p->type,
 367                         p->capability, p->rangelow,
 368                         p->rangehigh, p->signal, p->afc,
 369                         p->rxsubchans, p->audmode);
 370 }
 371
 372 static void v4l_print_frequency(const void *arg, bool write_only)
 373 {
 374         const struct v4l2_frequency *p = arg;
 375
 376         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 377                                 p->tuner, p->type, p->frequency);
 378 }
 379
 380 static void v4l_print_standard(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_standard *p = arg;
 383
 384         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 385                 "framelines=%u\n", p->index,
 386                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 387                 p->frameperiod.numerator,
 388                 p->frameperiod.denominator,
 389                 p->framelines);
 390 }
 391
 392 static void v4l_print_std(const void *arg, bool write_only)
 393 {
 394         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 395 }
 396
 397 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 398 {
 399         const struct v4l2_hw_freq_seek *p = arg;
 400
 401         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 402                 "rangelow=%u, rangehigh=%u\n",
 403                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 404                 p->rangelow, p->rangehigh);
 405 }
 406
 407 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 408 {
 409         const struct v4l2_requestbuffers *p = arg;
 410
 411         pr_cont("count=%d, type=%s, memory=%s\n",
 412                 p->count,
 413                 prt_names(p->type, v4l2_type_names),
 414                 prt_names(p->memory, v4l2_memory_names));
 415 }
 416
 417 static void v4l_print_buffer(const void *arg, bool write_only)
 418 {
 419         const struct v4l2_buffer *p = arg;
 420         const struct v4l2_timecode *tc = &p->timecode;
 421         const struct v4l2_plane *plane;
 422         int i;
 423
 424         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 425                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 426                         p->timestamp.tv_sec / 3600,
 427                         (int)(p->timestamp.tv_sec / 60) % 60,
 428                         (int)(p->timestamp.tv_sec % 60),
 429                         (long)p->timestamp.tv_usec,
 430                         p->index,
 431                         prt_names(p->type, v4l2_type_names),
 432                         p->flags, prt_names(p->field, v4l2_field_names),
 433                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 434
 435         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 436                 pr_cont("\n");
 437                 for (i = 0; i < p->length; ++i) {
 438                         plane = &p->m.planes[i];
 439                         printk(KERN_DEBUG
 440                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 441                                 "offset/userptr=0x%lx, length=%d\n",
 442                                 i, plane->bytesused, plane->data_offset,
 443                                 plane->m.userptr, plane->length);
 444                 }
 445         } else {
 446                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 447                         p->bytesused, p->m.userptr, p->length);
 448         }
 449
 450         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 451                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 452                         tc->hours, tc->minutes, tc->seconds,
 453                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 454 }
 455
 456 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 457 {
 458         const struct v4l2_exportbuffer *p = arg;
 459
 460         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 461                 p->fd, prt_names(p->type, v4l2_type_names),
 462                 p->index, p->plane, p->flags);
 463 }
 464
 465 static void v4l_print_create_buffers(const void *arg, bool write_only)
 466 {
 467         const struct v4l2_create_buffers *p = arg;
 468
 469         pr_cont("index=%d, count=%d, memory=%s, ",
 470                         p->index, p->count,
 471                         prt_names(p->memory, v4l2_memory_names));
 472         v4l_print_format(&p->format, write_only);
 473 }
 474
 475 static void v4l_print_streamparm(const void *arg, bool write_only)
 476 {
 477         const struct v4l2_streamparm *p = arg;
 478
 479         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 480
 481         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 482             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 483                 const struct v4l2_captureparm *c = &p->parm.capture;
 484
 485                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 486                         "extendedmode=%d, readbuffers=%d\n",
 487                         c->capability, c->capturemode,
 488                         c->timeperframe.numerator, c->timeperframe.denominator,
 489                         c->extendedmode, c->readbuffers);
 490         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 491                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 492                 const struct v4l2_outputparm *c = &p->parm.output;
 493
 494                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 495                         "extendedmode=%d, writebuffers=%d\n",
 496                         c->capability, c->outputmode,
 497                         c->timeperframe.numerator, c->timeperframe.denominator,
 498                         c->extendedmode, c->writebuffers);
 499         } else {
 500                 pr_cont("\n");
 501         }
 502 }
 503
 504 static void v4l_print_queryctrl(const void *arg, bool write_only)
 505 {
 506         const struct v4l2_queryctrl *p = arg;
 507
 508         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 509                 "step=%d, default=%d, flags=0x%08x\n",
 510                         p->id, p->type, (int)sizeof(p->name), p->name,
 511                         p->minimum, p->maximum,
 512                         p->step, p->default_value, p->flags);
 513 }
 514
 515 static void v4l_print_querymenu(const void *arg, bool write_only)
 516 {
 517         const struct v4l2_querymenu *p = arg;
 518
 519         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 520 }
 521
 522 static void v4l_print_control(const void *arg, bool write_only)
 523 {
 524         const struct v4l2_control *p = arg;
 525
 526         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 527 }
 528
 529 static void v4l_print_ext_controls(const void *arg, bool write_only)
 530 {
 531         const struct v4l2_ext_controls *p = arg;
 532         int i;
 533
 534         pr_cont("class=0x%x, count=%d, error_idx=%d",
 535                         p->ctrl_class, p->count, p->error_idx);
 536         for (i = 0; i < p->count; i++) {
 537                 if (p->controls[i].size)
 538                         pr_cont(", id/val=0x%x/0x%x",
 539                                 p->controls[i].id, p->controls[i].value);
 540                 else
 541                         pr_cont(", id/size=0x%x/%u",
 542                                 p->controls[i].id, p->controls[i].size);
 543         }
 544         pr_cont("\n");
 545 }
 546
 547 static void v4l_print_cropcap(const void *arg, bool write_only)
 548 {
 549         const struct v4l2_cropcap *p = arg;
 550
 551         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 552                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 553                 "pixelaspect %d/%d\n",
 554                 prt_names(p->type, v4l2_type_names),
 555                 p->bounds.width, p->bounds.height,
 556                 p->bounds.left, p->bounds.top,
 557                 p->defrect.width, p->defrect.height,
 558                 p->defrect.left, p->defrect.top,
 559                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 560 }
 561
 562 static void v4l_print_crop(const void *arg, bool write_only)
 563 {
 564         const struct v4l2_crop *p = arg;
 565
 566         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 567                 prt_names(p->type, v4l2_type_names),
 568                 p->c.width, p->c.height,
 569                 p->c.left, p->c.top);
 570 }
 571
 572 static void v4l_print_selection(const void *arg, bool write_only)
 573 {
 574         const struct v4l2_selection *p = arg;
 575
 576         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 577                 prt_names(p->type, v4l2_type_names),
 578                 p->target, p->flags,
 579                 p->r.width, p->r.height, p->r.left, p->r.top);
 580 }
 581
 582 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 583 {
 584         const struct v4l2_jpegcompression *p = arg;
 585
 586         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 587                 "COM_len=%d, jpeg_markers=0x%x\n",
 588                 p->quality, p->APPn, p->APP_len,
 589                 p->COM_len, p->jpeg_markers);
 590 }
 591
 592 static void v4l_print_enc_idx(const void *arg, bool write_only)
 593 {
 594         const struct v4l2_enc_idx *p = arg;
 595
 596         pr_cont("entries=%d, entries_cap=%d\n",
 597                         p->entries, p->entries_cap);
 598 }
 599
 600 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 601 {
 602         const struct v4l2_encoder_cmd *p = arg;
 603
 604         pr_cont("cmd=%d, flags=0x%x\n",
 605                         p->cmd, p->flags);
 606 }
 607
 608 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 609 {
 610         const struct v4l2_decoder_cmd *p = arg;
 611
 612         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 613
 614         if (p->cmd == V4L2_DEC_CMD_START)
 615                 pr_info("speed=%d, format=%u\n",
 616                                 p->start.speed, p->start.format);
 617         else if (p->cmd == V4L2_DEC_CMD_STOP)
 618                 pr_info("pts=%llu\n", p->stop.pts);
 619 }
 620
 621 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_dbg_chip_info *p = arg;
 624
 625         pr_cont("type=%u, ", p->match.type);
 626         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 627                 pr_cont("name=%.*s, ",
 628                                 (int)sizeof(p->match.name), p->match.name);
 629         else
 630                 pr_cont("addr=%u, ", p->match.addr);
 631         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 632 }
 633
 634 static void v4l_print_dbg_register(const void *arg, bool write_only)
 635 {
 636         const struct v4l2_dbg_register *p = arg;
 637
 638         pr_cont("type=%u, ", p->match.type);
 639         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 640                 pr_cont("name=%.*s, ",
 641                                 (int)sizeof(p->match.name), p->match.name);
 642         else
 643                 pr_cont("addr=%u, ", p->match.addr);
 644         pr_cont("reg=0x%llx, val=0x%llx\n",
 645                         p->reg, p->val);
 646 }
 647
 648 static void v4l_print_dv_timings(const void *arg, bool write_only)
 649 {
 650         const struct v4l2_dv_timings *p = arg;
 651
 652         switch (p->type) {
 653         case V4L2_DV_BT_656_1120:
 654                 pr_cont("type=bt-656/1120, interlaced=%u, "
 655                         "pixelclock=%llu, "
 656                         "width=%u, height=%u, polarities=0x%x, "
 657                         "hfrontporch=%u, hsync=%u, "
 658                         "hbackporch=%u, vfrontporch=%u, "
 659                         "vsync=%u, vbackporch=%u, "
 660                         "il_vfrontporch=%u, il_vsync=%u, "
 661                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 662                                 p->bt.interlaced, p->bt.pixelclock,
 663                                 p->bt.width, p->bt.height,
 664                                 p->bt.polarities, p->bt.hfrontporch,
 665                                 p->bt.hsync, p->bt.hbackporch,
 666                                 p->bt.vfrontporch, p->bt.vsync,
 667                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 668                                 p->bt.il_vsync, p->bt.il_vbackporch,
 669                                 p->bt.standards, p->bt.flags);
 670                 break;
 671         default:
 672                 pr_cont("type=%d\n", p->type);
 673                 break;
 674         }
 675 }
 676
 677 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 678 {
 679         const struct v4l2_enum_dv_timings *p = arg;
 680
 681         pr_cont("index=%u, ", p->index);
 682         v4l_print_dv_timings(&p->timings, write_only);
 683 }
 684
 685 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 686 {
 687         const struct v4l2_dv_timings_cap *p = arg;
 688
 689         switch (p->type) {
 690         case V4L2_DV_BT_656_1120:
 691                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 692                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 693                         p->bt.min_width, p->bt.max_width,
 694                         p->bt.min_height, p->bt.max_height,
 695                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 696                         p->bt.standards, p->bt.capabilities);
 697                 break;
 698         default:
 699                 pr_cont("type=%u\n", p->type);
 700                 break;
 701         }
 702 }
 703
 704 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 705 {
 706         const struct v4l2_frmsizeenum *p = arg;
 707
 708         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 709                         p->index,
 710                         (p->pixel_format & 0xff),
 711                         (p->pixel_format >>  8) & 0xff,
 712                         (p->pixel_format >> 16) & 0xff,
 713                         (p->pixel_format >> 24) & 0xff,
 714                         p->type);
 715         switch (p->type) {
 716         case V4L2_FRMSIZE_TYPE_DISCRETE:
 717                 pr_cont(", wxh=%ux%u\n",
 718                         p->discrete.width, p->discrete.height);
 719                 break;
 720         case V4L2_FRMSIZE_TYPE_STEPWISE:
 721                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 722                                 p->stepwise.min_width,  p->stepwise.min_height,
 723                                 p->stepwise.step_width, p->stepwise.step_height,
 724                                 p->stepwise.max_width,  p->stepwise.max_height);
 725                 break;
 726         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 727                 /* fall through */
 728         default:
 729                 pr_cont("\n");
 730                 break;
 731         }
 732 }
 733
 734 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_frmivalenum *p = arg;
 737
 738         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 739                         p->index,
 740                         (p->pixel_format & 0xff),
 741                         (p->pixel_format >>  8) & 0xff,
 742                         (p->pixel_format >> 16) & 0xff,
 743                         (p->pixel_format >> 24) & 0xff,
 744                         p->width, p->height, p->type);
 745         switch (p->type) {
 746         case V4L2_FRMIVAL_TYPE_DISCRETE:
 747                 pr_cont(", fps=%d/%d\n",
 748                                 p->discrete.numerator,
 749                                 p->discrete.denominator);
 750                 break;
 751         case V4L2_FRMIVAL_TYPE_STEPWISE:
 752                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 753                                 p->stepwise.min.numerator,
 754                                 p->stepwise.min.denominator,
 755                                 p->stepwise.max.numerator,
 756                                 p->stepwise.max.denominator,
 757                                 p->stepwise.step.numerator,
 758                                 p->stepwise.step.denominator);
 759                 break;
 760         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 761                 /* fall through */
 762         default:
 763                 pr_cont("\n");
 764                 break;
 765         }
 766 }
 767
 768 static void v4l_print_event(const void *arg, bool write_only)
 769 {
 770         const struct v4l2_event *p = arg;
 771         const struct v4l2_event_ctrl *c;
 772
 773         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 774                 "timestamp=%lu.%9.9lu\n",
 775                         p->type, p->pending, p->sequence, p->id,
 776                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 777         switch (p->type) {
 778         case V4L2_EVENT_VSYNC:
 779                 printk(KERN_DEBUG "field=%s\n",
 780                         prt_names(p->u.vsync.field, v4l2_field_names));
 781                 break;
 782         case V4L2_EVENT_CTRL:
 783                 c = &p->u.ctrl;
 784                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 785                         c->changes, c->type);
 786                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 787                         pr_cont("value64=%lld, ", c->value64);
 788                 else
 789                         pr_cont("value=%d, ", c->value);
 790                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 791                         "default_value=%d\n",
 792                         c->flags, c->minimum, c->maximum,
 793                         c->step, c->default_value);
 794                 break;
 795         case V4L2_EVENT_FRAME_SYNC:
 796                 pr_cont("frame_sequence=%u\n",
 797                         p->u.frame_sync.frame_sequence);
 798                 break;
 799         }
 800 }
 801
 802 static void v4l_print_event_subscription(const void *arg, bool write_only)
 803 {
 804         const struct v4l2_event_subscription *p = arg;
 805
 806         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 807                         p->type, p->id, p->flags);
 808 }
 809
 810 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 811 {
 812         const struct v4l2_sliced_vbi_cap *p = arg;
 813         int i;
 814
 815         pr_cont("type=%s, service_set=0x%08x\n",
 816                         prt_names(p->type, v4l2_type_names), p->service_set);
 817         for (i = 0; i < 24; i++)
 818                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 819                                 p->service_lines[0][i],
 820                                 p->service_lines[1][i]);
 821 }
 822
 823 static void v4l_print_freq_band(const void *arg, bool write_only)
 824 {
 825         const struct v4l2_frequency_band *p = arg;
 826
 827         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 828                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 829                         p->tuner, p->type, p->index,
 830                         p->capability, p->rangelow,
 831                         p->rangehigh, p->modulation);
 832 }
 833
 834 static void v4l_print_u32(const void *arg, bool write_only)
 835 {
 836         pr_cont("value=%u\n", *(const u32 *)arg);
 837 }
 838
 839 static void v4l_print_newline(const void *arg, bool write_only)
 840 {
 841         pr_cont("\n");
 842 }
 843
 844 static void v4l_print_default(const void *arg, bool write_only)
 845 {
 846         pr_cont("driver-specific ioctl\n");
 847 }
 848
 849 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 850 {
 851         __u32 i;
 852
 853         /* zero the reserved fields */
 854         c->reserved[0] = c->reserved[1] = 0;
 855         for (i = 0; i < c->count; i++)
 856                 c->controls[i].reserved2[0] = 0;
 857
 858         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 859            when using extended controls.
 860            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 861            is it allowed for backwards compatibility.
 862          */
 863         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 864                 return 0;
 865         /* Check that all controls are from the same control class. */
 866         for (i = 0; i < c->count; i++) {
 867                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 868                         c->error_idx = i;
 869                         return 0;
 870                 }
 871         }
 872         return 1;
 873 }
 874
 875 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 876 {
 877         struct video_device *vfd = video_devdata(file);
 878         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 879         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 880         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 881         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 882         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 883
 884         if (ops == NULL)
 885                 return -EINVAL;
 886
 887         switch (type) {
 888         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 889                 if (is_vid && is_rx &&
 890                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 891                         return 0;
 892                 break;
 893         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 894                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 895                         return 0;
 896                 break;
 897         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 898                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 899                         return 0;
 900                 break;
 901         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 902                 if (is_vid && is_tx &&
 903                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 904                         return 0;
 905                 break;
 906         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 907                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 908                         return 0;
 909                 break;
 910         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 911                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 912                         return 0;
 913                 break;
 914         case V4L2_BUF_TYPE_VBI_CAPTURE:
 915                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 916                         return 0;
 917                 break;
 918         case V4L2_BUF_TYPE_VBI_OUTPUT:
 919                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 920                         return 0;
 921                 break;
 922         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 923                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 924                         return 0;
 925                 break;
 926         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 927                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 928                         return 0;
 929                 break;
 930         default:
 931                 break;
 932         }
 933         return -EINVAL;
 934 }
 935
 936 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 937                                 struct file *file, void *fh, void *arg)
 938 {
 939         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 940
 941         cap->version = LINUX_VERSION_CODE;
 942         return ops->vidioc_querycap(file, fh, cap);
 943 }
 944
 945 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 946                                 struct file *file, void *fh, void *arg)
 947 {
 948         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 949 }
 950
 951 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 952                                 struct file *file, void *fh, void *arg)
 953 {
 954         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 955 }
 956
 957 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 958                                 struct file *file, void *fh, void *arg)
 959 {
 960         struct video_device *vfd;
 961         u32 *p = arg;
 962
 963         if (ops->vidioc_g_priority)
 964                 return ops->vidioc_g_priority(file, fh, arg);
 965         vfd = video_devdata(file);
 966         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 967         return 0;
 968 }
 969
 970 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 971                                 struct file *file, void *fh, void *arg)
 972 {
 973         struct video_device *vfd;
 974         struct v4l2_fh *vfh;
 975         u32 *p = arg;
 976
 977         if (ops->vidioc_s_priority)
 978                 return ops->vidioc_s_priority(file, fh, *p);
 979         vfd = video_devdata(file);
 980         vfh = file->private_data;
 981         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
 982 }
 983
 984 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
 985                                 struct file *file, void *fh, void *arg)
 986 {
 987         struct video_device *vfd = video_devdata(file);
 988         struct v4l2_input *p = arg;
 989
 990         /*
 991          * We set the flags for CAP_DV_TIMINGS &
 992          * CAP_STD here based on ioctl handler provided by the
 993          * driver. If the driver doesn't support these
 994          * for a specific input, it must override these flags.
 995          */
 996         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
 997                 p->capabilities |= V4L2_IN_CAP_STD;
 998
 999         return ops->vidioc_enum_input(file, fh, p);
1000 }
1001
1002 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1003                                 struct file *file, void *fh, void *arg)
1004 {
1005         struct video_device *vfd = video_devdata(file);
1006         struct v4l2_output *p = arg;
1007
1008         /*
1009          * We set the flags for CAP_DV_TIMINGS &
1010          * CAP_STD here based on ioctl handler provided by the
1011          * driver. If the driver doesn't support these
1012          * for a specific output, it must override these flags.
1013          */
1014         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1015                 p->capabilities |= V4L2_OUT_CAP_STD;
1016
1017         return ops->vidioc_enum_output(file, fh, p);
1018 }
1019
1020 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1021                                 struct file *file, void *fh, void *arg)
1022 {
1023         struct v4l2_fmtdesc *p = arg;
1024         struct video_device *vfd = video_devdata(file);
1025         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1026         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1027
1028         switch (p->type) {
1029         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1030                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1031                         break;
1032                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1033         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1034                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1035                         break;
1036                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1037         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1038                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1039                         break;
1040                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1041         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1042                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1043                         break;
1044                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1045         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1046                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1047                         break;
1048                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1049         }
1050         return -EINVAL;
1051 }
1052
1053 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1054                                 struct file *file, void *fh, void *arg)
1055 {
1056         struct v4l2_format *p = arg;
1057         struct video_device *vfd = video_devdata(file);
1058         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1059         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1060         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1061
1062         switch (p->type) {
1063         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1064                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1065                         break;
1066                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1067         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1068                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1069                         break;
1070                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1071         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1072                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1073                         break;
1074                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1075         case V4L2_BUF_TYPE_VBI_CAPTURE:
1076                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1077                         break;
1078                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1079         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1080                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1081                         break;
1082                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1083         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1084                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1085                         break;
1086                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1087         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1088                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1089                         break;
1090                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1091         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1092                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1093                         break;
1094                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1095         case V4L2_BUF_TYPE_VBI_OUTPUT:
1096                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1097                         break;
1098                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1099         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1100                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1101                         break;
1102                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1103         }
1104         return -EINVAL;
1105 }
1106
1107 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1108                                 struct file *file, void *fh, void *arg)
1109 {
1110         struct v4l2_format *p = arg;
1111         struct video_device *vfd = video_devdata(file);
1112         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1113         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1114         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1115
1116         switch (p->type) {
1117         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1118                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1119                         break;
1120                 CLEAR_AFTER_FIELD(p, fmt.pix);
1121                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1122         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1123                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1124                         break;
1125                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1126                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1127         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1128                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1129                         break;
1130                 CLEAR_AFTER_FIELD(p, fmt.win);
1131                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1132         case V4L2_BUF_TYPE_VBI_CAPTURE:
1133                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1134                         break;
1135                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1136                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1137         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1138                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1139                         break;
1140                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1141                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1142         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1143                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1144                         break;
1145                 CLEAR_AFTER_FIELD(p, fmt.pix);
1146                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1147         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1148                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1149                         break;
1150                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1151                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1152         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1153                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1154                         break;
1155                 CLEAR_AFTER_FIELD(p, fmt.win);
1156                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1157         case V4L2_BUF_TYPE_VBI_OUTPUT:
1158                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1159                         break;
1160                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1161                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1162         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1163                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1164                         break;
1165                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1166                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1167         }
1168         return -EINVAL;
1169 }
1170
1171 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1172                                 struct file *file, void *fh, void *arg)
1173 {
1174         struct v4l2_format *p = arg;
1175         struct video_device *vfd = video_devdata(file);
1176         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1177         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1178         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1179
1180         switch (p->type) {
1181         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1182                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1183                         break;
1184                 CLEAR_AFTER_FIELD(p, fmt.pix);
1185                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1186         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1187                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1188                         break;
1189                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1190                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1191         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1192                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1193                         break;
1194                 CLEAR_AFTER_FIELD(p, fmt.win);
1195                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1196         case V4L2_BUF_TYPE_VBI_CAPTURE:
1197                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1198                         break;
1199                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1200                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1201         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1202                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1203                         break;
1204                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1205                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1206         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1207                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1208                         break;
1209                 CLEAR_AFTER_FIELD(p, fmt.pix);
1210                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1211         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1212                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1213                         break;
1214                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1215                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1216         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1217                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1218                         break;
1219                 CLEAR_AFTER_FIELD(p, fmt.win);
1220                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1221         case V4L2_BUF_TYPE_VBI_OUTPUT:
1222                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1223                         break;
1224                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1225                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1226         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1227                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1228                         break;
1229                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1230                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1231         }
1232         return -EINVAL;
1233 }
1234
1235 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1236                                 struct file *file, void *fh, void *arg)
1237 {
1238         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1239 }
1240
1241 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1242                                 struct file *file, void *fh, void *arg)
1243 {
1244         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1245 }
1246
1247 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1248                                 struct file *file, void *fh, void *arg)
1249 {
1250         struct video_device *vfd = video_devdata(file);
1251         struct v4l2_tuner *p = arg;
1252         int err;
1253
1254         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1255                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1256         err = ops->vidioc_g_tuner(file, fh, p);
1257         if (!err)
1258                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1259         return err;
1260 }
1261
1262 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1263                                 struct file *file, void *fh, void *arg)
1264 {
1265         struct video_device *vfd = video_devdata(file);
1266         struct v4l2_tuner *p = arg;
1267
1268         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1269                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1270         return ops->vidioc_s_tuner(file, fh, p);
1271 }
1272
1273 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1274                                 struct file *file, void *fh, void *arg)
1275 {
1276         struct v4l2_modulator *p = arg;
1277         int err;
1278
1279         err = ops->vidioc_g_modulator(file, fh, p);
1280         if (!err)
1281                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1282         return err;
1283 }
1284
1285 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1286                                 struct file *file, void *fh, void *arg)
1287 {
1288         struct video_device *vfd = video_devdata(file);
1289         struct v4l2_frequency *p = arg;
1290
1291         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1292                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1293         return ops->vidioc_g_frequency(file, fh, p);
1294 }
1295
1296 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1297                                 struct file *file, void *fh, void *arg)
1298 {
1299         struct video_device *vfd = video_devdata(file);
1300         const struct v4l2_frequency *p = arg;
1301         enum v4l2_tuner_type type;
1302
1303         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1304                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1305         if (p->type != type)
1306                 return -EINVAL;
1307         return ops->vidioc_s_frequency(file, fh, p);
1308 }
1309
1310 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1311                                 struct file *file, void *fh, void *arg)
1312 {
1313         struct video_device *vfd = video_devdata(file);
1314         struct v4l2_standard *p = arg;
1315         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1316         unsigned int index = p->index, i, j = 0;
1317         const char *descr = "";
1318
1319         /* Return -ENODATA if the tvnorms for the current input
1320            or output is 0, meaning that it doesn't support this API. */
1321         if (id == 0)
1322                 return -ENODATA;
1323
1324         /* Return norm array in a canonical way */
1325         for (i = 0; i <= index && id; i++) {
1326                 /* last std value in the standards array is 0, so this
1327                    while always ends there since (id & 0) == 0. */
1328                 while ((id & standards[j].std) != standards[j].std)
1329                         j++;
1330                 curr_id = standards[j].std;
1331                 descr = standards[j].descr;
1332                 j++;
1333                 if (curr_id == 0)
1334                         break;
1335                 if (curr_id != V4L2_STD_PAL &&
1336                                 curr_id != V4L2_STD_SECAM &&
1337                                 curr_id != V4L2_STD_NTSC)
1338                         id &= ~curr_id;
1339         }
1340         if (i <= index)
1341                 return -EINVAL;
1342
1343         v4l2_video_std_construct(p, curr_id, descr);
1344         return 0;
1345 }
1346
1347 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1348                                 struct file *file, void *fh, void *arg)
1349 {
1350         struct video_device *vfd = video_devdata(file);
1351         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1352
1353         norm = id & vfd->tvnorms;
1354         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1355                 return -EINVAL;
1356
1357         /* Calls the specific handler */
1358         return ops->vidioc_s_std(file, fh, norm);
1359 }
1360
1361 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1362                                 struct file *file, void *fh, void *arg)
1363 {
1364         struct video_device *vfd = video_devdata(file);
1365         v4l2_std_id *p = arg;
1366
1367         /*
1368          * If no signal is detected, then the driver should return
1369          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1370          * any standards that do not apply removed.
1371          *
1372          * This means that tuners, audio and video decoders can join
1373          * their efforts to improve the standards detection.
1374          */
1375         *p = vfd->tvnorms;
1376         return ops->vidioc_querystd(file, fh, arg);
1377 }
1378
1379 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1380                                 struct file *file, void *fh, void *arg)
1381 {
1382         struct video_device *vfd = video_devdata(file);
1383         struct v4l2_hw_freq_seek *p = arg;
1384         enum v4l2_tuner_type type;
1385
1386         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1387                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1388         if (p->type != type)
1389                 return -EINVAL;
1390         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1391 }
1392
1393 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1394                                 struct file *file, void *fh, void *arg)
1395 {
1396         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1397 }
1398
1399 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1400                                 struct file *file, void *fh, void *arg)
1401 {
1402         struct v4l2_requestbuffers *p = arg;
1403         int ret = check_fmt(file, p->type);
1404
1405         if (ret)
1406                 return ret;
1407
1408         CLEAR_AFTER_FIELD(p, memory);
1409
1410         return ops->vidioc_reqbufs(file, fh, p);
1411 }
1412
1413 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1414                                 struct file *file, void *fh, void *arg)
1415 {
1416         struct v4l2_buffer *p = arg;
1417         int ret = check_fmt(file, p->type);
1418
1419         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1420 }
1421
1422 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1423                                 struct file *file, void *fh, void *arg)
1424 {
1425         struct v4l2_buffer *p = arg;
1426         int ret = check_fmt(file, p->type);
1427
1428         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1429 }
1430
1431 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1432                                 struct file *file, void *fh, void *arg)
1433 {
1434         struct v4l2_buffer *p = arg;
1435         int ret = check_fmt(file, p->type);
1436
1437         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1438 }
1439
1440 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1441                                 struct file *file, void *fh, void *arg)
1442 {
1443         struct v4l2_create_buffers *create = arg;
1444         int ret = check_fmt(file, create->format.type);
1445
1446         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1447 }
1448
1449 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1450                                 struct file *file, void *fh, void *arg)
1451 {
1452         struct v4l2_buffer *b = arg;
1453         int ret = check_fmt(file, b->type);
1454
1455         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1456 }
1457
1458 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1459                                 struct file *file, void *fh, void *arg)
1460 {
1461         struct v4l2_streamparm *p = arg;
1462         v4l2_std_id std;
1463         int ret = check_fmt(file, p->type);
1464
1465         if (ret)
1466                 return ret;
1467         if (ops->vidioc_g_parm)
1468                 return ops->vidioc_g_parm(file, fh, p);
1469         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1470             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1471                 return -EINVAL;
1472         p->parm.capture.readbuffers = 2;
1473         ret = ops->vidioc_g_std(file, fh, &std);
1474         if (ret == 0)
1475                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1476         return ret;
1477 }
1478
1479 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1480                                 struct file *file, void *fh, void *arg)
1481 {
1482         struct v4l2_streamparm *p = arg;
1483         int ret = check_fmt(file, p->type);
1484
1485         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1486 }
1487
1488 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1489                                 struct file *file, void *fh, void *arg)
1490 {
1491         struct video_device *vfd = video_devdata(file);
1492         struct v4l2_queryctrl *p = arg;
1493         struct v4l2_fh *vfh =
1494                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1495
1496         if (vfh && vfh->ctrl_handler)
1497                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1498         if (vfd->ctrl_handler)
1499                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1500         if (ops->vidioc_queryctrl)
1501                 return ops->vidioc_queryctrl(file, fh, p);
1502         return -ENOTTY;
1503 }
1504
1505 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1506                                 struct file *file, void *fh, void *arg)
1507 {
1508         struct video_device *vfd = video_devdata(file);
1509         struct v4l2_querymenu *p = arg;
1510         struct v4l2_fh *vfh =
1511                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1512
1513         if (vfh && vfh->ctrl_handler)
1514                 return v4l2_querymenu(vfh->ctrl_handler, p);
1515         if (vfd->ctrl_handler)
1516                 return v4l2_querymenu(vfd->ctrl_handler, p);
1517         if (ops->vidioc_querymenu)
1518                 return ops->vidioc_querymenu(file, fh, p);
1519         return -ENOTTY;
1520 }
1521
1522 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1523                                 struct file *file, void *fh, void *arg)
1524 {
1525         struct video_device *vfd = video_devdata(file);
1526         struct v4l2_control *p = arg;
1527         struct v4l2_fh *vfh =
1528                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1529         struct v4l2_ext_controls ctrls;
1530         struct v4l2_ext_control ctrl;
1531
1532         if (vfh && vfh->ctrl_handler)
1533                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1534         if (vfd->ctrl_handler)
1535                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1536         if (ops->vidioc_g_ctrl)
1537                 return ops->vidioc_g_ctrl(file, fh, p);
1538         if (ops->vidioc_g_ext_ctrls == NULL)
1539                 return -ENOTTY;
1540
1541         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1542         ctrls.count = 1;
1543         ctrls.controls = &ctrl;
1544         ctrl.id = p->id;
1545         ctrl.value = p->value;
1546         if (check_ext_ctrls(&ctrls, 1)) {
1547                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1548
1549                 if (ret == 0)
1550                         p->value = ctrl.value;
1551                 return ret;
1552         }
1553         return -EINVAL;
1554 }
1555
1556 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1557                                 struct file *file, void *fh, void *arg)
1558 {
1559         struct video_device *vfd = video_devdata(file);
1560         struct v4l2_control *p = arg;
1561         struct v4l2_fh *vfh =
1562                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1563         struct v4l2_ext_controls ctrls;
1564         struct v4l2_ext_control ctrl;
1565
1566         if (vfh && vfh->ctrl_handler)
1567                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1568         if (vfd->ctrl_handler)
1569                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1570         if (ops->vidioc_s_ctrl)
1571                 return ops->vidioc_s_ctrl(file, fh, p);
1572         if (ops->vidioc_s_ext_ctrls == NULL)
1573                 return -ENOTTY;
1574
1575         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1576         ctrls.count = 1;
1577         ctrls.controls = &ctrl;
1578         ctrl.id = p->id;
1579         ctrl.value = p->value;
1580         if (check_ext_ctrls(&ctrls, 1))
1581                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1582         return -EINVAL;
1583 }
1584
1585 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1586                                 struct file *file, void *fh, void *arg)
1587 {
1588         struct video_device *vfd = video_devdata(file);
1589         struct v4l2_ext_controls *p = arg;
1590         struct v4l2_fh *vfh =
1591                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1592
1593         p->error_idx = p->count;
1594         if (vfh && vfh->ctrl_handler)
1595                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1596         if (vfd->ctrl_handler)
1597                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1598         if (ops->vidioc_g_ext_ctrls == NULL)
1599                 return -ENOTTY;
1600         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1601                                         -EINVAL;
1602 }
1603
1604 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1605                                 struct file *file, void *fh, void *arg)
1606 {
1607         struct video_device *vfd = video_devdata(file);
1608         struct v4l2_ext_controls *p = arg;
1609         struct v4l2_fh *vfh =
1610                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1611
1612         p->error_idx = p->count;
1613         if (vfh && vfh->ctrl_handler)
1614                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1615         if (vfd->ctrl_handler)
1616                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1617         if (ops->vidioc_s_ext_ctrls == NULL)
1618                 return -ENOTTY;
1619         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1620                                         -EINVAL;
1621 }
1622
1623 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1624                                 struct file *file, void *fh, void *arg)
1625 {
1626         struct video_device *vfd = video_devdata(file);
1627         struct v4l2_ext_controls *p = arg;
1628         struct v4l2_fh *vfh =
1629                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1630
1631         p->error_idx = p->count;
1632         if (vfh && vfh->ctrl_handler)
1633                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1634         if (vfd->ctrl_handler)
1635                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1636         if (ops->vidioc_try_ext_ctrls == NULL)
1637                 return -ENOTTY;
1638         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1639                                         -EINVAL;
1640 }
1641
1642 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1643                                 struct file *file, void *fh, void *arg)
1644 {
1645         struct v4l2_crop *p = arg;
1646         struct v4l2_selection s = {
1647                 .type = p->type,
1648         };
1649         int ret;
1650
1651         if (ops->vidioc_g_crop)
1652                 return ops->vidioc_g_crop(file, fh, p);
1653         /* simulate capture crop using selection api */
1654
1655         /* crop means compose for output devices */
1656         if (V4L2_TYPE_IS_OUTPUT(p->type))
1657                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1658         else
1659                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1660
1661         ret = ops->vidioc_g_selection(file, fh, &s);
1662
1663         /* copying results to old structure on success */
1664         if (!ret)
1665                 p->c = s.r;
1666         return ret;
1667 }
1668
1669 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1670                                 struct file *file, void *fh, void *arg)
1671 {
1672         struct v4l2_crop *p = arg;
1673         struct v4l2_selection s = {
1674                 .type = p->type,
1675                 .r = p->c,
1676         };
1677
1678         if (ops->vidioc_s_crop)
1679                 return ops->vidioc_s_crop(file, fh, p);
1680         /* simulate capture crop using selection api */
1681
1682         /* crop means compose for output devices */
1683         if (V4L2_TYPE_IS_OUTPUT(p->type))
1684                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1685         else
1686                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1687
1688         return ops->vidioc_s_selection(file, fh, &s);
1689 }
1690
1691 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1692                                 struct file *file, void *fh, void *arg)
1693 {
1694         struct v4l2_cropcap *p = arg;
1695         struct v4l2_selection s = { .type = p->type };
1696         int ret;
1697
1698         if (ops->vidioc_cropcap)
1699                 return ops->vidioc_cropcap(file, fh, p);
1700
1701         /* obtaining bounds */
1702         if (V4L2_TYPE_IS_OUTPUT(p->type))
1703                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1704         else
1705                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1706
1707         ret = ops->vidioc_g_selection(file, fh, &s);
1708         if (ret)
1709                 return ret;
1710         p->bounds = s.r;
1711
1712         /* obtaining defrect */
1713         if (V4L2_TYPE_IS_OUTPUT(p->type))
1714                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1715         else
1716                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1717
1718         ret = ops->vidioc_g_selection(file, fh, &s);
1719         if (ret)
1720                 return ret;
1721         p->defrect = s.r;
1722
1723         /* setting trivial pixelaspect */
1724         p->pixelaspect.numerator = 1;
1725         p->pixelaspect.denominator = 1;
1726         return 0;
1727 }
1728
1729 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1730                                 struct file *file, void *fh, void *arg)
1731 {
1732         struct video_device *vfd = video_devdata(file);
1733         int ret;
1734
1735         if (vfd->v4l2_dev)
1736                 pr_info("%s: =================  START STATUS  =================\n",
1737                         vfd->v4l2_dev->name);
1738         ret = ops->vidioc_log_status(file, fh);
1739         if (vfd->v4l2_dev)
1740                 pr_info("%s: ==================  END STATUS  ==================\n",
1741                         vfd->v4l2_dev->name);
1742         return ret;
1743 }
1744
1745 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1746                                 struct file *file, void *fh, void *arg)
1747 {
1748 #ifdef CONFIG_VIDEO_ADV_DEBUG
1749         struct v4l2_dbg_register *p = arg;
1750         struct video_device *vfd = video_devdata(file);
1751         struct v4l2_subdev *sd;
1752         int idx = 0;
1753
1754         if (!capable(CAP_SYS_ADMIN))
1755                 return -EPERM;
1756         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1757                 if (vfd->v4l2_dev == NULL)
1758                         return -EINVAL;
1759                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1760                         if (p->match.addr == idx++)
1761                                 return v4l2_subdev_call(sd, core, g_register, p);
1762                 return -EINVAL;
1763         }
1764         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1765             (ops->vidioc_g_chip_info || p->match.addr == 0))
1766                 return ops->vidioc_g_register(file, fh, p);
1767         return -EINVAL;
1768 #else
1769         return -ENOTTY;
1770 #endif
1771 }
1772
1773 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1774                                 struct file *file, void *fh, void *arg)
1775 {
1776 #ifdef CONFIG_VIDEO_ADV_DEBUG
1777         const struct v4l2_dbg_register *p = arg;
1778         struct video_device *vfd = video_devdata(file);
1779         struct v4l2_subdev *sd;
1780         int idx = 0;
1781
1782         if (!capable(CAP_SYS_ADMIN))
1783                 return -EPERM;
1784         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1785                 if (vfd->v4l2_dev == NULL)
1786                         return -EINVAL;
1787                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1788                         if (p->match.addr == idx++)
1789                                 return v4l2_subdev_call(sd, core, s_register, p);
1790                 return -EINVAL;
1791         }
1792         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1793             (ops->vidioc_g_chip_info || p->match.addr == 0))
1794                 return ops->vidioc_s_register(file, fh, p);
1795         return -EINVAL;
1796 #else
1797         return -ENOTTY;
1798 #endif
1799 }
1800
1801 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1802                                 struct file *file, void *fh, void *arg)
1803 {
1804 #ifdef CONFIG_VIDEO_ADV_DEBUG
1805         struct video_device *vfd = video_devdata(file);
1806         struct v4l2_dbg_chip_info *p = arg;
1807         struct v4l2_subdev *sd;
1808         int idx = 0;
1809
1810         switch (p->match.type) {
1811         case V4L2_CHIP_MATCH_BRIDGE:
1812                 if (ops->vidioc_s_register)
1813                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1814                 if (ops->vidioc_g_register)
1815                         p->flags |= V4L2_CHIP_FL_READABLE;
1816                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1817                 if (ops->vidioc_g_chip_info)
1818                         return ops->vidioc_g_chip_info(file, fh, arg);
1819                 if (p->match.addr)
1820                         return -EINVAL;
1821                 return 0;
1822
1823         case V4L2_CHIP_MATCH_SUBDEV:
1824                 if (vfd->v4l2_dev == NULL)
1825                         break;
1826                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1827                         if (p->match.addr != idx++)
1828                                 continue;
1829                         if (sd->ops->core && sd->ops->core->s_register)
1830                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
1831                         if (sd->ops->core && sd->ops->core->g_register)
1832                                 p->flags |= V4L2_CHIP_FL_READABLE;
1833                         strlcpy(p->name, sd->name, sizeof(p->name));
1834                         return 0;
1835                 }
1836                 break;
1837         }
1838         return -EINVAL;
1839 #else
1840         return -ENOTTY;
1841 #endif
1842 }
1843
1844 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1845                                 struct file *file, void *fh, void *arg)
1846 {
1847         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1848 }
1849
1850 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1851                                 struct file *file, void *fh, void *arg)
1852 {
1853         return ops->vidioc_subscribe_event(fh, arg);
1854 }
1855
1856 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1857                                 struct file *file, void *fh, void *arg)
1858 {
1859         return ops->vidioc_unsubscribe_event(fh, arg);
1860 }
1861
1862 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1863                                 struct file *file, void *fh, void *arg)
1864 {
1865         struct v4l2_sliced_vbi_cap *p = arg;
1866         int ret = check_fmt(file, p->type);
1867
1868         if (ret)
1869                 return ret;
1870
1871         /* Clear up to type, everything after type is zeroed already */
1872         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1873
1874         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1875 }
1876
1877 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1878                                 struct file *file, void *fh, void *arg)
1879 {
1880         struct video_device *vfd = video_devdata(file);
1881         struct v4l2_frequency_band *p = arg;
1882         enum v4l2_tuner_type type;
1883         int err;
1884
1885         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1886                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1887
1888         if (type != p->type)
1889                 return -EINVAL;
1890         if (ops->vidioc_enum_freq_bands)
1891                 return ops->vidioc_enum_freq_bands(file, fh, p);
1892         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1893                 struct v4l2_tuner t = {
1894                         .index = p->tuner,
1895                         .type = type,
1896                 };
1897
1898                 if (p->index)
1899                         return -EINVAL;
1900                 err = ops->vidioc_g_tuner(file, fh, &t);
1901                 if (err)
1902                         return err;
1903                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1904                 p->rangelow = t.rangelow;
1905                 p->rangehigh = t.rangehigh;
1906                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1907                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1908                 return 0;
1909         }
1910         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1911                 struct v4l2_modulator m = {
1912                         .index = p->tuner,
1913                 };
1914
1915                 if (type != V4L2_TUNER_RADIO)
1916                         return -EINVAL;
1917                 if (p->index)
1918                         return -EINVAL;
1919                 err = ops->vidioc_g_modulator(file, fh, &m);
1920                 if (err)
1921                         return err;
1922                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1923                 p->rangelow = m.rangelow;
1924                 p->rangehigh = m.rangehigh;
1925                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1926                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1927                 return 0;
1928         }
1929         return -ENOTTY;
1930 }
1931
1932 struct v4l2_ioctl_info {
1933         unsigned int ioctl;
1934         u32 flags;
1935         const char * const name;
1936         union {
1937                 u32 offset;
1938                 int (*func)(const struct v4l2_ioctl_ops *ops,
1939                                 struct file *file, void *fh, void *p);
1940         } u;
1941         void (*debug)(const void *arg, bool write_only);
1942 };
1943
1944 /* This control needs a priority check */
1945 #define INFO_FL_PRIO    (1 << 0)
1946 /* This control can be valid if the filehandle passes a control handler. */
1947 #define INFO_FL_CTRL    (1 << 1)
1948 /* This is a standard ioctl, no need for special code */
1949 #define INFO_FL_STD     (1 << 2)
1950 /* This is ioctl has its own function */
1951 #define INFO_FL_FUNC    (1 << 3)
1952 /* Queuing ioctl */
1953 #define INFO_FL_QUEUE   (1 << 4)
1954 /* Zero struct from after the field to the end */
1955 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1956         ((offsetof(struct v4l2_struct, field) +                 \
1957           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1958 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1959
1960 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1961         [_IOC_NR(_ioctl)] = {                                           \
1962                 .ioctl = _ioctl,                                        \
1963                 .flags = _flags | INFO_FL_STD,                          \
1964                 .name = #_ioctl,                                        \
1965                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1966                 .debug = _debug,                                        \
1967         }
1968
1969 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1970         [_IOC_NR(_ioctl)] = {                                           \
1971                 .ioctl = _ioctl,                                        \
1972                 .flags = _flags | INFO_FL_FUNC,                         \
1973                 .name = #_ioctl,                                        \
1974                 .u.func = _func,                                        \
1975                 .debug = _debug,                                        \
1976         }
1977
1978 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1979         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1980         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1981         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1982         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1983         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1984         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1985         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1986         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1987         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
1988         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1989         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
1990         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1991         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1992         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1993         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1994         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1995         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
1996         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1997         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1998         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1999         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2000         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2001         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2002         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2003         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2004         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2005         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2006         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2007         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2008         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2009         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2010         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2011         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2012         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2013         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2014         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2015         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2016         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2017         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2018         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2019         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2020         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2021         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2022         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2023         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2024         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2025         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2026         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2027         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2028         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2029         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2030         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2031         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)),
2032         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2033         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2034         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2035         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2036         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2037         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2038         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2039         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2040         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2041         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2042         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2043         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2044         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2045         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2046         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2047         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2048         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2049         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2050         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2051         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2052         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2053         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2054         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2055         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2056         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2057         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)),
2058 };
2059 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2060
2061 bool v4l2_is_known_ioctl(unsigned int cmd)
2062 {
2063         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2064                 return false;
2065         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2066 }
2067
2068 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2069 {
2070         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2071                 return vdev->lock;
2072         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2073                 return NULL;
2074         if (vdev->queue && vdev->queue->lock &&
2075                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2076                 return vdev->queue->lock;
2077         return vdev->lock;
2078 }
2079
2080 /* Common ioctl debug function. This function can be used by
2081    external ioctl messages as well as internal V4L ioctl */
2082 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2083 {
2084         const char *dir, *type;
2085
2086         if (prefix)
2087                 printk(KERN_DEBUG "%s: ", prefix);
2088
2089         switch (_IOC_TYPE(cmd)) {
2090         case 'd':
2091                 type = "v4l2_int";
2092                 break;
2093         case 'V':
2094                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2095                         type = "v4l2";
2096                         break;
2097                 }
2098                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2099                 return;
2100         default:
2101                 type = "unknown";
2102                 break;
2103         }
2104
2105         switch (_IOC_DIR(cmd)) {
2106         case _IOC_NONE:              dir = "--"; break;
2107         case _IOC_READ:              dir = "r-"; break;
2108         case _IOC_WRITE:             dir = "-w"; break;
2109         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2110         default:                     dir = "*ERR*"; break;
2111         }
2112         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2113                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2114 }
2115 EXPORT_SYMBOL(v4l_printk_ioctl);
2116
2117 static long __video_do_ioctl(struct file *file,
2118                 unsigned int cmd, void *arg)
2119 {
2120         struct video_device *vfd = video_devdata(file);
2121         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2122         bool write_only = false;
2123         struct v4l2_ioctl_info default_info;
2124         const struct v4l2_ioctl_info *info;
2125         void *fh = file->private_data;
2126         struct v4l2_fh *vfh = NULL;
2127         int use_fh_prio = 0;
2128         int debug = vfd->debug;
2129         long ret = -ENOTTY;
2130
2131         if (ops == NULL) {
2132                 pr_warn("%s: has no ioctl_ops.\n",
2133                                 video_device_node_name(vfd));
2134                 return ret;
2135         }
2136
2137         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2138                 vfh = file->private_data;
2139                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2140         }
2141
2142         if (v4l2_is_known_ioctl(cmd)) {
2143                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2144
2145                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2146                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2147                         goto done;
2148
2149                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2150                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2151                         if (ret)
2152                                 goto done;
2153                 }
2154         } else {
2155                 default_info.ioctl = cmd;
2156                 default_info.flags = 0;
2157                 default_info.debug = v4l_print_default;
2158                 info = &default_info;
2159         }
2160
2161         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2162         if (info->flags & INFO_FL_STD) {
2163                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2164                 const void *p = vfd->ioctl_ops;
2165                 const vidioc_op *vidioc = p + info->u.offset;
2166
2167                 ret = (*vidioc)(file, fh, arg);
2168         } else if (info->flags & INFO_FL_FUNC) {
2169                 ret = info->u.func(ops, file, fh, arg);
2170         } else if (!ops->vidioc_default) {
2171                 ret = -ENOTTY;
2172         } else {
2173                 ret = ops->vidioc_default(file, fh,
2174                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2175                         cmd, arg);
2176         }
2177
2178 done:
2179         if (debug) {
2180                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2181                 if (ret < 0)
2182                         pr_cont(": error %ld", ret);
2183                 if (debug == V4L2_DEBUG_IOCTL)
2184                         pr_cont("\n");
2185                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2186                         info->debug(arg, write_only);
2187                 else {
2188                         pr_cont(": ");
2189                         info->debug(arg, write_only);
2190                 }
2191         }
2192
2193         return ret;
2194 }
2195
2196 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2197                             void * __user *user_ptr, void ***kernel_ptr)
2198 {
2199         int ret = 0;
2200
2201         switch (cmd) {
2202         case VIDIOC_PREPARE_BUF:
2203         case VIDIOC_QUERYBUF:
2204         case VIDIOC_QBUF:
2205         case VIDIOC_DQBUF: {
2206                 struct v4l2_buffer *buf = parg;
2207
2208                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2209                         if (buf->length > VIDEO_MAX_PLANES) {
2210                                 ret = -EINVAL;
2211                                 break;
2212                         }
2213                         *user_ptr = (void __user *)buf->m.planes;
2214                         *kernel_ptr = (void *)&buf->m.planes;
2215                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2216                         ret = 1;
2217                 }
2218                 break;
2219         }
2220
2221         case VIDIOC_SUBDEV_G_EDID:
2222         case VIDIOC_SUBDEV_S_EDID: {
2223                 struct v4l2_subdev_edid *edid = parg;
2224
2225                 if (edid->blocks) {
2226                         if (edid->blocks > 256) {
2227                                 ret = -EINVAL;
2228                                 break;
2229                         }
2230                         *user_ptr = (void __user *)edid->edid;
2231                         *kernel_ptr = (void *)&edid->edid;
2232                         *array_size = edid->blocks * 128;
2233                         ret = 1;
2234                 }
2235                 break;
2236         }
2237
2238         case VIDIOC_S_EXT_CTRLS:
2239         case VIDIOC_G_EXT_CTRLS:
2240         case VIDIOC_TRY_EXT_CTRLS: {
2241                 struct v4l2_ext_controls *ctrls = parg;
2242
2243                 if (ctrls->count != 0) {
2244                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2245                                 ret = -EINVAL;
2246                                 break;
2247                         }
2248                         *user_ptr = (void __user *)ctrls->controls;
2249                         *kernel_ptr = (void *)&ctrls->controls;
2250                         *array_size = sizeof(struct v4l2_ext_control)
2251                                     * ctrls->count;
2252                         ret = 1;
2253                 }
2254                 break;
2255         }
2256         }
2257
2258         return ret;
2259 }
2260
2261 long
2262 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2263                v4l2_kioctl func)
2264 {
2265         char    sbuf[128];
2266         void    *mbuf = NULL;
2267         void    *parg = (void *)arg;
2268         long    err  = -EINVAL;
2269         bool    has_array_args;
2270         size_t  array_size = 0;
2271         void __user *user_ptr = NULL;
2272         void    **kernel_ptr = NULL;
2273
2274         /*  Copy arguments into temp kernel buffer  */
2275         if (_IOC_DIR(cmd) != _IOC_NONE) {
2276                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2277                         parg = sbuf;
2278                 } else {
2279                         /* too big to allocate from stack */
2280                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2281                         if (NULL == mbuf)
2282                                 return -ENOMEM;
2283                         parg = mbuf;
2284                 }
2285
2286                 err = -EFAULT;
2287                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2288                         unsigned int n = _IOC_SIZE(cmd);
2289
2290                         /*
2291                          * In some cases, only a few fields are used as input,
2292                          * i.e. when the app sets "index" and then the driver
2293                          * fills in the rest of the structure for the thing
2294                          * with that index.  We only need to copy up the first
2295                          * non-input field.
2296                          */
2297                         if (v4l2_is_known_ioctl(cmd)) {
2298                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2299                                 if (flags & INFO_FL_CLEAR_MASK)
2300                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2301                         }
2302
2303                         if (copy_from_user(parg, (void __user *)arg, n))
2304                                 goto out;
2305
2306                         /* zero out anything we don't copy from userspace */
2307                         if (n < _IOC_SIZE(cmd))
2308                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2309                 } else {
2310                         /* read-only ioctl */
2311                         memset(parg, 0, _IOC_SIZE(cmd));
2312                 }
2313         }
2314
2315         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2316         if (err < 0)
2317                 goto out;
2318         has_array_args = err;
2319
2320         if (has_array_args) {
2321                 /*
2322                  * When adding new types of array args, make sure that the
2323                  * parent argument to ioctl (which contains the pointer to the
2324                  * array) fits into sbuf (so that mbuf will still remain
2325                  * unused up to here).
2326                  */
2327                 mbuf = kmalloc(array_size, GFP_KERNEL);
2328                 err = -ENOMEM;
2329                 if (NULL == mbuf)
2330                         goto out_array_args;
2331                 err = -EFAULT;
2332                 if (copy_from_user(mbuf, user_ptr, array_size))
2333                         goto out_array_args;
2334                 *kernel_ptr = mbuf;
2335         }
2336
2337         /* Handles IOCTL */
2338         err = func(file, cmd, parg);
2339         if (err == -ENOIOCTLCMD)
2340                 err = -ENOTTY;
2341
2342         if (has_array_args) {
2343                 *kernel_ptr = user_ptr;
2344                 if (copy_to_user(user_ptr, mbuf, array_size))
2345                         err = -EFAULT;
2346                 goto out_array_args;
2347         }
2348         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2349            results that must be returned. */
2350         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2351                 goto out;
2352
2353 out_array_args:
2354         /*  Copy results into user buffer  */
2355         switch (_IOC_DIR(cmd)) {
2356         case _IOC_READ:
2357         case (_IOC_WRITE | _IOC_READ):
2358                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2359                         err = -EFAULT;
2360                 break;
2361         }
2362
2363 out:
2364         kfree(mbuf);
2365         return err;
2366 }
2367 EXPORT_SYMBOL(video_usercopy);
2368
2369 long video_ioctl2(struct file *file,
2370                unsigned int cmd, unsigned long arg)
2371 {
2372         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2373 }
2374 EXPORT_SYMBOL(video_ioctl2);