drivers/media/video/v4l2-ioctl.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #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/v4l2-chip-ident.h>
  30 #include <media/videobuf2-core.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 struct std_descr {
  39         v4l2_std_id std;
  40         const char *descr;
  41 };
  42
  43 static const struct std_descr standards[] = {
  44         { V4L2_STD_NTSC,        "NTSC"      },
  45         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  46         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  47         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  48         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  49         { V4L2_STD_PAL,         "PAL"       },
  50         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  51         { V4L2_STD_PAL_B,       "PAL-B"     },
  52         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  53         { V4L2_STD_PAL_G,       "PAL-G"     },
  54         { V4L2_STD_PAL_H,       "PAL-H"     },
  55         { V4L2_STD_PAL_I,       "PAL-I"     },
  56         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  57         { V4L2_STD_PAL_D,       "PAL-D"     },
  58         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  59         { V4L2_STD_PAL_K,       "PAL-K"     },
  60         { V4L2_STD_PAL_M,       "PAL-M"     },
  61         { V4L2_STD_PAL_N,       "PAL-N"     },
  62         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  63         { V4L2_STD_PAL_60,      "PAL-60"    },
  64         { V4L2_STD_SECAM,       "SECAM"     },
  65         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  66         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  67         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  68         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  69         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  70         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  71         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  72         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  73         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  74         { 0,                    "Unknown"   }
  75 };
  76
  77 /* video4linux standard ID conversion to standard name
  78  */
  79 const char *v4l2_norm_to_name(v4l2_std_id id)
  80 {
  81         u32 myid = id;
  82         int i;
  83
  84         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  85            64 bit comparations. So, on that architecture, with some gcc
  86            variants, compilation fails. Currently, the max value is 30bit wide.
  87          */
  88         BUG_ON(myid != id);
  89
  90         for (i = 0; standards[i].std; i++)
  91                 if (myid == standards[i].std)
  92                         break;
  93         return standards[i].descr;
  94 }
  95 EXPORT_SYMBOL(v4l2_norm_to_name);
  96
  97 /* Returns frame period for the given standard */
  98 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  99 {
 100         if (id & V4L2_STD_525_60) {
 101                 frameperiod->numerator = 1001;
 102                 frameperiod->denominator = 30000;
 103         } else {
 104                 frameperiod->numerator = 1;
 105                 frameperiod->denominator = 25;
 106         }
 107 }
 108 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 109
 110 /* Fill in the fields of a v4l2_standard structure according to the
 111    'id' and 'transmission' parameters.  Returns negative on error.  */
 112 int v4l2_video_std_construct(struct v4l2_standard *vs,
 113                              int id, const char *name)
 114 {
 115         vs->id = id;
 116         v4l2_video_std_frame_period(id, &vs->frameperiod);
 117         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 118         strlcpy(vs->name, name, sizeof(vs->name));
 119         return 0;
 120 }
 121 EXPORT_SYMBOL(v4l2_video_std_construct);
 122
 123 /* ----------------------------------------------------------------- */
 124 /* some arrays for pretty-printing debug messages of enum types      */
 125
 126 const char *v4l2_field_names[] = {
 127         [V4L2_FIELD_ANY]        = "any",
 128         [V4L2_FIELD_NONE]       = "none",
 129         [V4L2_FIELD_TOP]        = "top",
 130         [V4L2_FIELD_BOTTOM]     = "bottom",
 131         [V4L2_FIELD_INTERLACED] = "interlaced",
 132         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 133         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 134         [V4L2_FIELD_ALTERNATE]  = "alternate",
 135         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 136         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 137 };
 138 EXPORT_SYMBOL(v4l2_field_names);
 139
 140 const char *v4l2_type_names[] = {
 141         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 142         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 143         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 144         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 145         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 146         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 147         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 148         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 149         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 151 };
 152 EXPORT_SYMBOL(v4l2_type_names);
 153
 154 static const char *v4l2_memory_names[] = {
 155         [V4L2_MEMORY_MMAP]    = "mmap",
 156         [V4L2_MEMORY_USERPTR] = "userptr",
 157         [V4L2_MEMORY_OVERLAY] = "overlay",
 158 };
 159
 160 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 161                            arr[a] : "unknown")
 162
 163 /* ------------------------------------------------------------------ */
 164 /* debug help functions                                               */
 165
 166 static void v4l_print_querycap(const void *arg, bool write_only)
 167 {
 168         const struct v4l2_capability *p = arg;
 169
 170         pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, "
 171                 "capabilities=0x%08x, device_caps=0x%08x\n",
 172                 p->driver, p->card, p->bus_info,
 173                 p->version, p->capabilities, p->device_caps);
 174 }
 175
 176 static void v4l_print_enuminput(const void *arg, bool write_only)
 177 {
 178         const struct v4l2_input *p = arg;
 179
 180         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, "
 181                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 182                 p->index, p->name, p->type, p->audioset, p->tuner,
 183                 (unsigned long long)p->std, p->status, p->capabilities);
 184 }
 185
 186 static void v4l_print_enumoutput(const void *arg, bool write_only)
 187 {
 188         const struct v4l2_output *p = arg;
 189
 190         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, "
 191                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 192                 p->index, p->name, p->type, p->audioset, p->modulator,
 193                 (unsigned long long)p->std, p->capabilities);
 194 }
 195
 196 static void v4l_print_audio(const void *arg, bool write_only)
 197 {
 198         const struct v4l2_audio *p = arg;
 199
 200         if (write_only)
 201                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 202         else
 203                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
 204                         p->index, p->name, p->capability, p->mode);
 205 }
 206
 207 static void v4l_print_audioout(const void *arg, bool write_only)
 208 {
 209         const struct v4l2_audioout *p = arg;
 210
 211         if (write_only)
 212                 pr_cont("index=%u\n", p->index);
 213         else
 214                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
 215                         p->index, p->name, p->capability, p->mode);
 216 }
 217
 218 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 219 {
 220         const struct v4l2_fmtdesc *p = arg;
 221
 222         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n",
 223                 p->index, prt_names(p->type, v4l2_type_names),
 224                 p->flags, (p->pixelformat & 0xff),
 225                 (p->pixelformat >>  8) & 0xff,
 226                 (p->pixelformat >> 16) & 0xff,
 227                 (p->pixelformat >> 24) & 0xff,
 228                 p->description);
 229 }
 230
 231 static void v4l_print_format(const void *arg, bool write_only)
 232 {
 233         const struct v4l2_format *p = arg;
 234         const struct v4l2_pix_format *pix;
 235         const struct v4l2_pix_format_mplane *mp;
 236         const struct v4l2_vbi_format *vbi;
 237         const struct v4l2_sliced_vbi_format *sliced;
 238         const struct v4l2_window *win;
 239         const struct v4l2_clip *clip;
 240         unsigned i;
 241
 242         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 243         switch (p->type) {
 244         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 245         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 246                 pix = &p->fmt.pix;
 247                 pr_cont(", width=%u, height=%u, "
 248                         "pixelformat=%c%c%c%c, field=%s, "
 249                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 250                         pix->width, pix->height,
 251                         (pix->pixelformat & 0xff),
 252                         (pix->pixelformat >>  8) & 0xff,
 253                         (pix->pixelformat >> 16) & 0xff,
 254                         (pix->pixelformat >> 24) & 0xff,
 255                         prt_names(pix->field, v4l2_field_names),
 256                         pix->bytesperline, pix->sizeimage,
 257                         pix->colorspace);
 258                 break;
 259         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 260         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 261                 mp = &p->fmt.pix_mp;
 262                 pr_cont(", width=%u, height=%u, "
 263                         "format=%c%c%c%c, field=%s, "
 264                         "colorspace=%d, num_planes=%u\n",
 265                         mp->width, mp->height,
 266                         (mp->pixelformat & 0xff),
 267                         (mp->pixelformat >>  8) & 0xff,
 268                         (mp->pixelformat >> 16) & 0xff,
 269                         (mp->pixelformat >> 24) & 0xff,
 270                         prt_names(mp->field, v4l2_field_names),
 271                         mp->colorspace, mp->num_planes);
 272                 for (i = 0; i < mp->num_planes; i++)
 273                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 274                                         mp->plane_fmt[i].bytesperline,
 275                                         mp->plane_fmt[i].sizeimage);
 276                 break;
 277         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 278         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 279                 win = &p->fmt.win;
 280                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 281                         "chromakey=0x%08x, bitmap=%p, "
 282                         "global_alpha=0x%02x\n",
 283                         win->w.width, win->w.height,
 284                         win->w.left, win->w.top,
 285                         prt_names(win->field, v4l2_field_names),
 286                         win->chromakey, win->bitmap, win->global_alpha);
 287                 clip = win->clips;
 288                 for (i = 0; i < win->clipcount; i++) {
 289                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 290                                         i, clip->c.width, clip->c.height,
 291                                         clip->c.left, clip->c.top);
 292                         clip = clip->next;
 293                 }
 294                 break;
 295         case V4L2_BUF_TYPE_VBI_CAPTURE:
 296         case V4L2_BUF_TYPE_VBI_OUTPUT:
 297                 vbi = &p->fmt.vbi;
 298                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 299                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 300                         vbi->sampling_rate, vbi->offset,
 301                         vbi->samples_per_line,
 302                         (vbi->sample_format & 0xff),
 303                         (vbi->sample_format >>  8) & 0xff,
 304                         (vbi->sample_format >> 16) & 0xff,
 305                         (vbi->sample_format >> 24) & 0xff,
 306                         vbi->start[0], vbi->start[1],
 307                         vbi->count[0], vbi->count[1]);
 308                 break;
 309         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 310         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 311                 sliced = &p->fmt.sliced;
 312                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 313                                 sliced->service_set, sliced->io_size);
 314                 for (i = 0; i < 24; i++)
 315                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 316                                 sliced->service_lines[0][i],
 317                                 sliced->service_lines[1][i]);
 318                 break;
 319         case V4L2_BUF_TYPE_PRIVATE:
 320                 pr_cont("\n");
 321                 break;
 322         }
 323 }
 324
 325 static void v4l_print_framebuffer(const void *arg, bool write_only)
 326 {
 327         const struct v4l2_framebuffer *p = arg;
 328
 329         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 330                 "height=%u, pixelformat=%c%c%c%c, "
 331                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 332                         p->capability, p->flags, p->base,
 333                         p->fmt.width, p->fmt.height,
 334                         (p->fmt.pixelformat & 0xff),
 335                         (p->fmt.pixelformat >>  8) & 0xff,
 336                         (p->fmt.pixelformat >> 16) & 0xff,
 337                         (p->fmt.pixelformat >> 24) & 0xff,
 338                         p->fmt.bytesperline, p->fmt.sizeimage,
 339                         p->fmt.colorspace);
 340 }
 341
 342 static void v4l_print_buftype(const void *arg, bool write_only)
 343 {
 344         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 345 }
 346
 347 static void v4l_print_modulator(const void *arg, bool write_only)
 348 {
 349         const struct v4l2_modulator *p = arg;
 350
 351         if (write_only)
 352                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 353         else
 354                 pr_cont("index=%u, name=%s, capability=0x%x, "
 355                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 356                         p->index, p->name, p->capability,
 357                         p->rangelow, p->rangehigh, p->txsubchans);
 358 }
 359
 360 static void v4l_print_tuner(const void *arg, bool write_only)
 361 {
 362         const struct v4l2_tuner *p = arg;
 363
 364         if (write_only)
 365                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 366         else
 367                 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, "
 368                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 369                         "rxsubchans=0x%x, audmode=%u\n",
 370                         p->index, p->name, p->type,
 371                         p->capability, p->rangelow,
 372                         p->rangehigh, p->signal, p->afc,
 373                         p->rxsubchans, p->audmode);
 374 }
 375
 376 static void v4l_print_frequency(const void *arg, bool write_only)
 377 {
 378         const struct v4l2_frequency *p = arg;
 379
 380         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 381                                 p->tuner, p->type, p->frequency);
 382 }
 383
 384 static void v4l_print_standard(const void *arg, bool write_only)
 385 {
 386         const struct v4l2_standard *p = arg;
 387
 388         pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, "
 389                 "framelines=%u\n", p->index,
 390                 (unsigned long long)p->id, p->name,
 391                 p->frameperiod.numerator,
 392                 p->frameperiod.denominator,
 393                 p->framelines);
 394 }
 395
 396 static void v4l_print_std(const void *arg, bool write_only)
 397 {
 398         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 399 }
 400
 401 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 402 {
 403         const struct v4l2_hw_freq_seek *p = arg;
 404
 405         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
 406                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
 407 }
 408
 409 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 410 {
 411         const struct v4l2_requestbuffers *p = arg;
 412
 413         pr_cont("count=%d, type=%s, memory=%s\n",
 414                 p->count,
 415                 prt_names(p->type, v4l2_type_names),
 416                 prt_names(p->memory, v4l2_memory_names));
 417 }
 418
 419 static void v4l_print_buffer(const void *arg, bool write_only)
 420 {
 421         const struct v4l2_buffer *p = arg;
 422         const struct v4l2_timecode *tc = &p->timecode;
 423         const struct v4l2_plane *plane;
 424         int i;
 425
 426         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 427                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 428                         p->timestamp.tv_sec / 3600,
 429                         (int)(p->timestamp.tv_sec / 60) % 60,
 430                         (int)(p->timestamp.tv_sec % 60),
 431                         (long)p->timestamp.tv_usec,
 432                         p->index,
 433                         prt_names(p->type, v4l2_type_names),
 434                         p->flags, prt_names(p->field, v4l2_field_names),
 435                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 436
 437         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 438                 pr_cont("\n");
 439                 for (i = 0; i < p->length; ++i) {
 440                         plane = &p->m.planes[i];
 441                         printk(KERN_DEBUG
 442                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 443                                 "offset/userptr=0x%lx, length=%d\n",
 444                                 i, plane->bytesused, plane->data_offset,
 445                                 plane->m.userptr, plane->length);
 446                 }
 447         } else {
 448                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 449                         p->bytesused, p->m.userptr, p->length);
 450         }
 451
 452         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 453                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 454                         tc->hours, tc->minutes, tc->seconds,
 455                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 456 }
 457
 458 static void v4l_print_create_buffers(const void *arg, bool write_only)
 459 {
 460         const struct v4l2_create_buffers *p = arg;
 461
 462         pr_cont("index=%d, count=%d, memory=%s, ",
 463                         p->index, p->count,
 464                         prt_names(p->memory, v4l2_memory_names));
 465         v4l_print_format(&p->format, write_only);
 466 }
 467
 468 static void v4l_print_streamparm(const void *arg, bool write_only)
 469 {
 470         const struct v4l2_streamparm *p = arg;
 471
 472         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 473
 474         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 475             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 476                 const struct v4l2_captureparm *c = &p->parm.capture;
 477
 478                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 479                         "extendedmode=%d, readbuffers=%d\n",
 480                         c->capability, c->capturemode,
 481                         c->timeperframe.numerator, c->timeperframe.denominator,
 482                         c->extendedmode, c->readbuffers);
 483         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 484                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 485                 const struct v4l2_outputparm *c = &p->parm.output;
 486
 487                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 488                         "extendedmode=%d, writebuffers=%d\n",
 489                         c->capability, c->outputmode,
 490                         c->timeperframe.numerator, c->timeperframe.denominator,
 491                         c->extendedmode, c->writebuffers);
 492         }
 493 }
 494
 495 static void v4l_print_queryctrl(const void *arg, bool write_only)
 496 {
 497         const struct v4l2_queryctrl *p = arg;
 498
 499         pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, "
 500                 "step=%d, default=%d, flags=0x%08x\n",
 501                         p->id, p->type, p->name,
 502                         p->minimum, p->maximum,
 503                         p->step, p->default_value, p->flags);
 504 }
 505
 506 static void v4l_print_querymenu(const void *arg, bool write_only)
 507 {
 508         const struct v4l2_querymenu *p = arg;
 509
 510         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 511 }
 512
 513 static void v4l_print_control(const void *arg, bool write_only)
 514 {
 515         const struct v4l2_control *p = arg;
 516
 517         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 518 }
 519
 520 static void v4l_print_ext_controls(const void *arg, bool write_only)
 521 {
 522         const struct v4l2_ext_controls *p = arg;
 523         int i;
 524
 525         pr_cont("class=0x%x, count=%d, error_idx=%d",
 526                         p->ctrl_class, p->count, p->error_idx);
 527         for (i = 0; i < p->count; i++) {
 528                 if (p->controls[i].size)
 529                         pr_cont(", id/val=0x%x/0x%x",
 530                                 p->controls[i].id, p->controls[i].value);
 531                 else
 532                         pr_cont(", id/size=0x%x/%u",
 533                                 p->controls[i].id, p->controls[i].size);
 534         }
 535         pr_cont("\n");
 536 }
 537
 538 static void v4l_print_cropcap(const void *arg, bool write_only)
 539 {
 540         const struct v4l2_cropcap *p = arg;
 541
 542         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 543                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 544                 "pixelaspect %d/%d\n",
 545                 prt_names(p->type, v4l2_type_names),
 546                 p->bounds.width, p->bounds.height,
 547                 p->bounds.left, p->bounds.top,
 548                 p->defrect.width, p->defrect.height,
 549                 p->defrect.left, p->defrect.top,
 550                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 551 }
 552
 553 static void v4l_print_crop(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_crop *p = arg;
 556
 557         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 558                 prt_names(p->type, v4l2_type_names),
 559                 p->c.width, p->c.height,
 560                 p->c.left, p->c.top);
 561 }
 562
 563 static void v4l_print_selection(const void *arg, bool write_only)
 564 {
 565         const struct v4l2_selection *p = arg;
 566
 567         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 568                 prt_names(p->type, v4l2_type_names),
 569                 p->target, p->flags,
 570                 p->r.width, p->r.height, p->r.left, p->r.top);
 571 }
 572
 573 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 574 {
 575         const struct v4l2_jpegcompression *p = arg;
 576
 577         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 578                 "COM_len=%d, jpeg_markers=0x%x\n",
 579                 p->quality, p->APPn, p->APP_len,
 580                 p->COM_len, p->jpeg_markers);
 581 }
 582
 583 static void v4l_print_enc_idx(const void *arg, bool write_only)
 584 {
 585         const struct v4l2_enc_idx *p = arg;
 586
 587         pr_cont("entries=%d, entries_cap=%d\n",
 588                         p->entries, p->entries_cap);
 589 }
 590
 591 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 592 {
 593         const struct v4l2_encoder_cmd *p = arg;
 594
 595         pr_cont("cmd=%d, flags=0x%x\n",
 596                         p->cmd, p->flags);
 597 }
 598
 599 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 600 {
 601         const struct v4l2_decoder_cmd *p = arg;
 602
 603         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 604
 605         if (p->cmd == V4L2_DEC_CMD_START)
 606                 pr_info("speed=%d, format=%u\n",
 607                                 p->start.speed, p->start.format);
 608         else if (p->cmd == V4L2_DEC_CMD_STOP)
 609                 pr_info("pts=%llu\n", p->stop.pts);
 610 }
 611
 612 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 613 {
 614         const struct v4l2_dbg_chip_ident *p = arg;
 615
 616         pr_cont("type=%u, ", p->match.type);
 617         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 618                 pr_cont("name=%s, ", p->match.name);
 619         else
 620                 pr_cont("addr=%u, ", p->match.addr);
 621         pr_cont("chip_ident=%u, revision=0x%x\n",
 622                         p->ident, p->revision);
 623 }
 624
 625 static void v4l_print_dbg_register(const void *arg, bool write_only)
 626 {
 627         const struct v4l2_dbg_register *p = arg;
 628
 629         pr_cont("type=%u, ", p->match.type);
 630         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 631                 pr_cont("name=%s, ", p->match.name);
 632         else
 633                 pr_cont("addr=%u, ", p->match.addr);
 634         pr_cont("reg=0x%llx, val=0x%llx\n",
 635                         p->reg, p->val);
 636 }
 637
 638 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
 639 {
 640         const struct v4l2_dv_enum_preset *p = arg;
 641
 642         pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n",
 643                         p->index, p->preset, p->name, p->width, p->height);
 644 }
 645
 646 static void v4l_print_dv_preset(const void *arg, bool write_only)
 647 {
 648         const struct v4l2_dv_preset *p = arg;
 649
 650         pr_cont("preset=%u\n", p->preset);
 651 }
 652
 653 static void v4l_print_dv_timings(const void *arg, bool write_only)
 654 {
 655         const struct v4l2_dv_timings *p = arg;
 656
 657         switch (p->type) {
 658         case V4L2_DV_BT_656_1120:
 659                 pr_cont("type=bt-656/1120, interlaced=%u, "
 660                         "pixelclock=%llu, "
 661                         "width=%u, height=%u, polarities=0x%x, "
 662                         "hfrontporch=%u, hsync=%u, "
 663                         "hbackporch=%u, vfrontporch=%u, "
 664                         "vsync=%u, vbackporch=%u, "
 665                         "il_vfrontporch=%u, il_vsync=%u, "
 666                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 667                                 p->bt.interlaced, p->bt.pixelclock,
 668                                 p->bt.width, p->bt.height,
 669                                 p->bt.polarities, p->bt.hfrontporch,
 670                                 p->bt.hsync, p->bt.hbackporch,
 671                                 p->bt.vfrontporch, p->bt.vsync,
 672                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 673                                 p->bt.il_vsync, p->bt.il_vbackporch,
 674                                 p->bt.standards, p->bt.flags);
 675                 break;
 676         default:
 677                 pr_cont("type=%d\n", p->type);
 678                 break;
 679         }
 680 }
 681
 682 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 683 {
 684         const struct v4l2_enum_dv_timings *p = arg;
 685
 686         pr_cont("index=%u, ", p->index);
 687         v4l_print_dv_timings(&p->timings, write_only);
 688 }
 689
 690 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 691 {
 692         const struct v4l2_dv_timings_cap *p = arg;
 693
 694         switch (p->type) {
 695         case V4L2_DV_BT_656_1120:
 696                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 697                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 698                         p->bt.min_width, p->bt.max_width,
 699                         p->bt.min_height, p->bt.max_height,
 700                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 701                         p->bt.standards, p->bt.capabilities);
 702                 break;
 703         default:
 704                 pr_cont("type=%u\n", p->type);
 705                 break;
 706         }
 707 }
 708
 709 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 710 {
 711         const struct v4l2_frmsizeenum *p = arg;
 712
 713         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 714                         p->index,
 715                         (p->pixel_format & 0xff),
 716                         (p->pixel_format >>  8) & 0xff,
 717                         (p->pixel_format >> 16) & 0xff,
 718                         (p->pixel_format >> 24) & 0xff,
 719                         p->type);
 720         switch (p->type) {
 721         case V4L2_FRMSIZE_TYPE_DISCRETE:
 722                 pr_cont(" wxh=%ux%u\n",
 723                         p->discrete.width, p->discrete.height);
 724                 break;
 725         case V4L2_FRMSIZE_TYPE_STEPWISE:
 726                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 727                                 p->stepwise.min_width,  p->stepwise.min_height,
 728                                 p->stepwise.step_width, p->stepwise.step_height,
 729                                 p->stepwise.max_width,  p->stepwise.max_height);
 730                 break;
 731         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 732                 /* fall through */
 733         default:
 734                 pr_cont("\n");
 735                 break;
 736         }
 737 }
 738
 739 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 740 {
 741         const struct v4l2_frmivalenum *p = arg;
 742
 743         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 744                         p->index,
 745                         (p->pixel_format & 0xff),
 746                         (p->pixel_format >>  8) & 0xff,
 747                         (p->pixel_format >> 16) & 0xff,
 748                         (p->pixel_format >> 24) & 0xff,
 749                         p->width, p->height, p->type);
 750         switch (p->type) {
 751         case V4L2_FRMIVAL_TYPE_DISCRETE:
 752                 pr_cont(" fps=%d/%d\n",
 753                                 p->discrete.numerator,
 754                                 p->discrete.denominator);
 755                 break;
 756         case V4L2_FRMIVAL_TYPE_STEPWISE:
 757                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 758                                 p->stepwise.min.numerator,
 759                                 p->stepwise.min.denominator,
 760                                 p->stepwise.max.numerator,
 761                                 p->stepwise.max.denominator,
 762                                 p->stepwise.step.numerator,
 763                                 p->stepwise.step.denominator);
 764                 break;
 765         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 766                 /* fall through */
 767         default:
 768                 pr_cont("\n");
 769                 break;
 770         }
 771 }
 772
 773 static void v4l_print_event(const void *arg, bool write_only)
 774 {
 775         const struct v4l2_event *p = arg;
 776         const struct v4l2_event_ctrl *c;
 777
 778         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 779                 "timestamp=%lu.%9.9lu\n",
 780                         p->type, p->pending, p->sequence, p->id,
 781                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 782         switch (p->type) {
 783         case V4L2_EVENT_VSYNC:
 784                 printk(KERN_DEBUG "field=%s\n",
 785                         prt_names(p->u.vsync.field, v4l2_field_names));
 786                 break;
 787         case V4L2_EVENT_CTRL:
 788                 c = &p->u.ctrl;
 789                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 790                         c->changes, c->type);
 791                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 792                         pr_cont("value64=%lld, ", c->value64);
 793                 else
 794                         pr_cont("value=%d, ", c->value);
 795                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 796                                 " default_value=%d\n",
 797                         c->flags, c->minimum, c->maximum,
 798                         c->step, c->default_value);
 799                 break;
 800         case V4L2_EVENT_FRAME_SYNC:
 801                 pr_cont("frame_sequence=%u\n",
 802                         p->u.frame_sync.frame_sequence);
 803                 break;
 804         }
 805 }
 806
 807 static void v4l_print_event_subscription(const void *arg, bool write_only)
 808 {
 809         const struct v4l2_event_subscription *p = arg;
 810
 811         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 812                         p->type, p->id, p->flags);
 813 }
 814
 815 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 816 {
 817         const struct v4l2_sliced_vbi_cap *p = arg;
 818         int i;
 819
 820         pr_cont("type=%s, service_set=0x%08x\n",
 821                         prt_names(p->type, v4l2_type_names), p->service_set);
 822         for (i = 0; i < 24; i++)
 823                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 824                                 p->service_lines[0][i],
 825                                 p->service_lines[1][i]);
 826 }
 827
 828 static void v4l_print_freq_band(const void *arg, bool write_only)
 829 {
 830         const struct v4l2_frequency_band *p = arg;
 831
 832         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 833                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 834                         p->tuner, p->type, p->index,
 835                         p->capability, p->rangelow,
 836                         p->rangehigh, p->modulation);
 837 }
 838
 839 static void v4l_print_u32(const void *arg, bool write_only)
 840 {
 841         pr_cont("value=%u\n", *(const u32 *)arg);
 842 }
 843
 844 static void v4l_print_newline(const void *arg, bool write_only)
 845 {
 846         pr_cont("\n");
 847 }
 848
 849 static void v4l_print_default(const void *arg, bool write_only)
 850 {
 851         pr_cont("driver-specific ioctl\n");
 852 }
 853
 854 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 855 {
 856         __u32 i;
 857
 858         /* zero the reserved fields */
 859         c->reserved[0] = c->reserved[1] = 0;
 860         for (i = 0; i < c->count; i++)
 861                 c->controls[i].reserved2[0] = 0;
 862
 863         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 864            when using extended controls.
 865            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 866            is it allowed for backwards compatibility.
 867          */
 868         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 869                 return 0;
 870         /* Check that all controls are from the same control class. */
 871         for (i = 0; i < c->count; i++) {
 872                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 873                         c->error_idx = i;
 874                         return 0;
 875                 }
 876         }
 877         return 1;
 878 }
 879
 880 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 881 {
 882         if (ops == NULL)
 883                 return -EINVAL;
 884
 885         switch (type) {
 886         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 887                 if (ops->vidioc_g_fmt_vid_cap ||
 888                                 ops->vidioc_g_fmt_vid_cap_mplane)
 889                         return 0;
 890                 break;
 891         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 892                 if (ops->vidioc_g_fmt_vid_cap_mplane)
 893                         return 0;
 894                 break;
 895         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 896                 if (ops->vidioc_g_fmt_vid_overlay)
 897                         return 0;
 898                 break;
 899         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 900                 if (ops->vidioc_g_fmt_vid_out ||
 901                                 ops->vidioc_g_fmt_vid_out_mplane)
 902                         return 0;
 903                 break;
 904         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 905                 if (ops->vidioc_g_fmt_vid_out_mplane)
 906                         return 0;
 907                 break;
 908         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 909                 if (ops->vidioc_g_fmt_vid_out_overlay)
 910                         return 0;
 911                 break;
 912         case V4L2_BUF_TYPE_VBI_CAPTURE:
 913                 if (ops->vidioc_g_fmt_vbi_cap)
 914                         return 0;
 915                 break;
 916         case V4L2_BUF_TYPE_VBI_OUTPUT:
 917                 if (ops->vidioc_g_fmt_vbi_out)
 918                         return 0;
 919                 break;
 920         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 921                 if (ops->vidioc_g_fmt_sliced_vbi_cap)
 922                         return 0;
 923                 break;
 924         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 925                 if (ops->vidioc_g_fmt_sliced_vbi_out)
 926                         return 0;
 927                 break;
 928         case V4L2_BUF_TYPE_PRIVATE:
 929                 if (ops->vidioc_g_fmt_type_private)
 930                         return 0;
 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 v4l2_input *p = arg;
 988
 989         /*
 990          * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
 991          * CAP_STD here based on ioctl handler provided by the
 992          * driver. If the driver doesn't support these
 993          * for a specific input, it must override these flags.
 994          */
 995         if (ops->vidioc_s_std)
 996                 p->capabilities |= V4L2_IN_CAP_STD;
 997         if (ops->vidioc_s_dv_preset)
 998                 p->capabilities |= V4L2_IN_CAP_PRESETS;
 999         if (ops->vidioc_s_dv_timings)
1000                 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1001
1002         return ops->vidioc_enum_input(file, fh, p);
1003 }
1004
1005 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1006                                 struct file *file, void *fh, void *arg)
1007 {
1008         struct v4l2_output *p = arg;
1009
1010         /*
1011          * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1012          * CAP_STD here based on ioctl handler provided by the
1013          * driver. If the driver doesn't support these
1014          * for a specific output, it must override these flags.
1015          */
1016         if (ops->vidioc_s_std)
1017                 p->capabilities |= V4L2_OUT_CAP_STD;
1018         if (ops->vidioc_s_dv_preset)
1019                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1020         if (ops->vidioc_s_dv_timings)
1021                 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1022
1023         return ops->vidioc_enum_output(file, fh, p);
1024 }
1025
1026 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1027                                 struct file *file, void *fh, void *arg)
1028 {
1029         struct v4l2_fmtdesc *p = arg;
1030
1031         switch (p->type) {
1032         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1033                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1034                         break;
1035                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1036         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1037                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1038                         break;
1039                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1040         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1041                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1042                         break;
1043                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1044         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1045                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1046                         break;
1047                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1048         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1049                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1050                         break;
1051                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1052         case V4L2_BUF_TYPE_PRIVATE:
1053                 if (unlikely(!ops->vidioc_enum_fmt_type_private))
1054                         break;
1055                 return ops->vidioc_enum_fmt_type_private(file, fh, arg);
1056         }
1057         return -EINVAL;
1058 }
1059
1060 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1061                                 struct file *file, void *fh, void *arg)
1062 {
1063         struct v4l2_format *p = arg;
1064
1065         switch (p->type) {
1066         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1067                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1068                         break;
1069                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1070         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1071                 if (unlikely(!ops->vidioc_g_fmt_vid_cap_mplane))
1072                         break;
1073                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1074         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1075                 if (unlikely(!ops->vidioc_g_fmt_vid_overlay))
1076                         break;
1077                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1078         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1079                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1080                         break;
1081                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1082         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1083                 if (unlikely(!ops->vidioc_g_fmt_vid_out_mplane))
1084                         break;
1085                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1086         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1087                 if (unlikely(!ops->vidioc_g_fmt_vid_out_overlay))
1088                         break;
1089                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1090         case V4L2_BUF_TYPE_VBI_CAPTURE:
1091                 if (unlikely(!ops->vidioc_g_fmt_vbi_cap))
1092                         break;
1093                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1094         case V4L2_BUF_TYPE_VBI_OUTPUT:
1095                 if (unlikely(!ops->vidioc_g_fmt_vbi_out))
1096                         break;
1097                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1098         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1099                 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_cap))
1100                         break;
1101                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1102         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1103                 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_out))
1104                         break;
1105                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1106         case V4L2_BUF_TYPE_PRIVATE:
1107                 if (unlikely(!ops->vidioc_g_fmt_type_private))
1108                         break;
1109                 return ops->vidioc_g_fmt_type_private(file, fh, arg);
1110         }
1111         return -EINVAL;
1112 }
1113
1114 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1115                                 struct file *file, void *fh, void *arg)
1116 {
1117         struct v4l2_format *p = arg;
1118
1119         switch (p->type) {
1120         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1121                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1122                         break;
1123                 CLEAR_AFTER_FIELD(p, fmt.pix);
1124                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1125         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1126                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1127                         break;
1128                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1129                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1130         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1131                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1132                         break;
1133                 CLEAR_AFTER_FIELD(p, fmt.win);
1134                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1135         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1136                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1137                         break;
1138                 CLEAR_AFTER_FIELD(p, fmt.pix);
1139                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1140         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1141                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1142                         break;
1143                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1144                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1145         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1146                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1147                         break;
1148                 CLEAR_AFTER_FIELD(p, fmt.win);
1149                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1150         case V4L2_BUF_TYPE_VBI_CAPTURE:
1151                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1152                         break;
1153                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1154                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1155         case V4L2_BUF_TYPE_VBI_OUTPUT:
1156                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1157                         break;
1158                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1159                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1160         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1161                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1162                         break;
1163                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1164                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1165         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1166                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1167                         break;
1168                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1169                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1170         case V4L2_BUF_TYPE_PRIVATE:
1171                 if (unlikely(!ops->vidioc_s_fmt_type_private))
1172                         break;
1173                 return ops->vidioc_s_fmt_type_private(file, fh, arg);
1174         }
1175         return -EINVAL;
1176 }
1177
1178 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1179                                 struct file *file, void *fh, void *arg)
1180 {
1181         struct v4l2_format *p = arg;
1182
1183         switch (p->type) {
1184         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1185                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1186                         break;
1187                 CLEAR_AFTER_FIELD(p, fmt.pix);
1188                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1189         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1190                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1191                         break;
1192                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1193                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1194         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1195                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1196                         break;
1197                 CLEAR_AFTER_FIELD(p, fmt.win);
1198                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1199         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1200                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1201                         break;
1202                 CLEAR_AFTER_FIELD(p, fmt.pix);
1203                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1204         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1205                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1206                         break;
1207                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1208                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1209         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1210                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1211                         break;
1212                 CLEAR_AFTER_FIELD(p, fmt.win);
1213                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1214         case V4L2_BUF_TYPE_VBI_CAPTURE:
1215                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1216                         break;
1217                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1218                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1219         case V4L2_BUF_TYPE_VBI_OUTPUT:
1220                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1221                         break;
1222                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1223                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1224         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1225                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1226                         break;
1227                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1228                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1229         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1230                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1231                         break;
1232                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1233                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1234         case V4L2_BUF_TYPE_PRIVATE:
1235                 if (unlikely(!ops->vidioc_try_fmt_type_private))
1236                         break;
1237                 return ops->vidioc_try_fmt_type_private(file, fh, arg);
1238         }
1239         return -EINVAL;
1240 }
1241
1242 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1243                                 struct file *file, void *fh, void *arg)
1244 {
1245         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1246 }
1247
1248 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1249                                 struct file *file, void *fh, void *arg)
1250 {
1251         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1252 }
1253
1254 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1255                                 struct file *file, void *fh, void *arg)
1256 {
1257         struct video_device *vfd = video_devdata(file);
1258         struct v4l2_tuner *p = arg;
1259         int err;
1260
1261         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1262                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1263         err = ops->vidioc_g_tuner(file, fh, p);
1264         if (!err)
1265                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1266         return err;
1267 }
1268
1269 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1270                                 struct file *file, void *fh, void *arg)
1271 {
1272         struct video_device *vfd = video_devdata(file);
1273         struct v4l2_tuner *p = arg;
1274
1275         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1276                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1277         return ops->vidioc_s_tuner(file, fh, p);
1278 }
1279
1280 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1281                                 struct file *file, void *fh, void *arg)
1282 {
1283         struct v4l2_modulator *p = arg;
1284         int err;
1285
1286         err = ops->vidioc_g_modulator(file, fh, p);
1287         if (!err)
1288                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1289         return err;
1290 }
1291
1292 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1293                                 struct file *file, void *fh, void *arg)
1294 {
1295         struct video_device *vfd = video_devdata(file);
1296         struct v4l2_frequency *p = arg;
1297
1298         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1299                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1300         return ops->vidioc_g_frequency(file, fh, p);
1301 }
1302
1303 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1304                                 struct file *file, void *fh, void *arg)
1305 {
1306         struct video_device *vfd = video_devdata(file);
1307         struct v4l2_frequency *p = arg;
1308         enum v4l2_tuner_type type;
1309
1310         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1311                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1312         if (p->type != type)
1313                 return -EINVAL;
1314         return ops->vidioc_s_frequency(file, fh, p);
1315 }
1316
1317 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1318                                 struct file *file, void *fh, void *arg)
1319 {
1320         struct video_device *vfd = video_devdata(file);
1321         struct v4l2_standard *p = arg;
1322         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1323         unsigned int index = p->index, i, j = 0;
1324         const char *descr = "";
1325
1326         /* Return norm array in a canonical way */
1327         for (i = 0; i <= index && id; i++) {
1328                 /* last std value in the standards array is 0, so this
1329                    while always ends there since (id & 0) == 0. */
1330                 while ((id & standards[j].std) != standards[j].std)
1331                         j++;
1332                 curr_id = standards[j].std;
1333                 descr = standards[j].descr;
1334                 j++;
1335                 if (curr_id == 0)
1336                         break;
1337                 if (curr_id != V4L2_STD_PAL &&
1338                                 curr_id != V4L2_STD_SECAM &&
1339                                 curr_id != V4L2_STD_NTSC)
1340                         id &= ~curr_id;
1341         }
1342         if (i <= index)
1343                 return -EINVAL;
1344
1345         v4l2_video_std_construct(p, curr_id, descr);
1346         return 0;
1347 }
1348
1349 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1350                                 struct file *file, void *fh, void *arg)
1351 {
1352         struct video_device *vfd = video_devdata(file);
1353         v4l2_std_id *id = arg;
1354
1355         /* Calls the specific handler */
1356         if (ops->vidioc_g_std)
1357                 return ops->vidioc_g_std(file, fh, arg);
1358         if (vfd->current_norm) {
1359                 *id = vfd->current_norm;
1360                 return 0;
1361         }
1362         return -ENOTTY;
1363 }
1364
1365 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1366                                 struct file *file, void *fh, void *arg)
1367 {
1368         struct video_device *vfd = video_devdata(file);
1369         v4l2_std_id *id = arg, norm;
1370         int ret;
1371
1372         norm = (*id) & vfd->tvnorms;
1373         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1374                 return -EINVAL;
1375
1376         /* Calls the specific handler */
1377         ret = ops->vidioc_s_std(file, fh, &norm);
1378
1379         /* Updates standard information */
1380         if (ret >= 0)
1381                 vfd->current_norm = norm;
1382         return ret;
1383 }
1384
1385 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1386                                 struct file *file, void *fh, void *arg)
1387 {
1388         struct video_device *vfd = video_devdata(file);
1389         v4l2_std_id *p = arg;
1390
1391         /*
1392          * If nothing detected, it should return all supported
1393          * standard.
1394          * Drivers just need to mask the std argument, in order
1395          * to remove the standards that don't apply from the mask.
1396          * This means that tuners, audio and video decoders can join
1397          * their efforts to improve the standards detection.
1398          */
1399         *p = vfd->tvnorms;
1400         return ops->vidioc_querystd(file, fh, arg);
1401 }
1402
1403 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1404                                 struct file *file, void *fh, void *arg)
1405 {
1406         struct video_device *vfd = video_devdata(file);
1407         struct v4l2_hw_freq_seek *p = arg;
1408         enum v4l2_tuner_type type;
1409
1410         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1411                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1412         if (p->type != type)
1413                 return -EINVAL;
1414         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1415 }
1416
1417 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1418                                 struct file *file, void *fh, void *arg)
1419 {
1420         struct v4l2_requestbuffers *p = arg;
1421         int ret = check_fmt(ops, p->type);
1422
1423         if (ret)
1424                 return ret;
1425
1426         if (p->type < V4L2_BUF_TYPE_PRIVATE)
1427                 CLEAR_AFTER_FIELD(p, memory);
1428
1429         return ops->vidioc_reqbufs(file, fh, p);
1430 }
1431
1432 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1433                                 struct file *file, void *fh, void *arg)
1434 {
1435         struct v4l2_buffer *p = arg;
1436         int ret = check_fmt(ops, p->type);
1437
1438         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1439 }
1440
1441 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1442                                 struct file *file, void *fh, void *arg)
1443 {
1444         struct v4l2_buffer *p = arg;
1445         int ret = check_fmt(ops, p->type);
1446
1447         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1448 }
1449
1450 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1451                                 struct file *file, void *fh, void *arg)
1452 {
1453         struct v4l2_buffer *p = arg;
1454         int ret = check_fmt(ops, p->type);
1455
1456         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1457 }
1458
1459 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1460                                 struct file *file, void *fh, void *arg)
1461 {
1462         struct v4l2_create_buffers *create = arg;
1463         int ret = check_fmt(ops, create->format.type);
1464
1465         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1466 }
1467
1468 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1469                                 struct file *file, void *fh, void *arg)
1470 {
1471         struct v4l2_buffer *b = arg;
1472         int ret = check_fmt(ops, b->type);
1473
1474         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1475 }
1476
1477 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1478                                 struct file *file, void *fh, void *arg)
1479 {
1480         struct video_device *vfd = video_devdata(file);
1481         struct v4l2_streamparm *p = arg;
1482         v4l2_std_id std;
1483         int ret = check_fmt(ops, p->type);
1484
1485         if (ret)
1486                 return ret;
1487         if (ops->vidioc_g_parm)
1488                 return ops->vidioc_g_parm(file, fh, p);
1489         std = vfd->current_norm;
1490         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1491             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1492                 return -EINVAL;
1493         p->parm.capture.readbuffers = 2;
1494         if (ops->vidioc_g_std)
1495                 ret = ops->vidioc_g_std(file, fh, &std);
1496         if (ret == 0)
1497                 v4l2_video_std_frame_period(std,
1498                             &p->parm.capture.timeperframe);
1499         return ret;
1500 }
1501
1502 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1503                                 struct file *file, void *fh, void *arg)
1504 {
1505         struct v4l2_streamparm *p = arg;
1506         int ret = check_fmt(ops, p->type);
1507
1508         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1509 }
1510
1511 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1512                                 struct file *file, void *fh, void *arg)
1513 {
1514         struct video_device *vfd = video_devdata(file);
1515         struct v4l2_queryctrl *p = arg;
1516         struct v4l2_fh *vfh =
1517                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1518
1519         if (vfh && vfh->ctrl_handler)
1520                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1521         if (vfd->ctrl_handler)
1522                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1523         if (ops->vidioc_queryctrl)
1524                 return ops->vidioc_queryctrl(file, fh, p);
1525         return -ENOTTY;
1526 }
1527
1528 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1529                                 struct file *file, void *fh, void *arg)
1530 {
1531         struct video_device *vfd = video_devdata(file);
1532         struct v4l2_querymenu *p = arg;
1533         struct v4l2_fh *vfh =
1534                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1535
1536         if (vfh && vfh->ctrl_handler)
1537                 return v4l2_querymenu(vfh->ctrl_handler, p);
1538         if (vfd->ctrl_handler)
1539                 return v4l2_querymenu(vfd->ctrl_handler, p);
1540         if (ops->vidioc_querymenu)
1541                 return ops->vidioc_querymenu(file, fh, p);
1542         return -ENOTTY;
1543 }
1544
1545 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1546                                 struct file *file, void *fh, void *arg)
1547 {
1548         struct video_device *vfd = video_devdata(file);
1549         struct v4l2_control *p = arg;
1550         struct v4l2_fh *vfh =
1551                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1552         struct v4l2_ext_controls ctrls;
1553         struct v4l2_ext_control ctrl;
1554
1555         if (vfh && vfh->ctrl_handler)
1556                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1557         if (vfd->ctrl_handler)
1558                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1559         if (ops->vidioc_g_ctrl)
1560                 return ops->vidioc_g_ctrl(file, fh, p);
1561         if (ops->vidioc_g_ext_ctrls == NULL)
1562                 return -ENOTTY;
1563
1564         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1565         ctrls.count = 1;
1566         ctrls.controls = &ctrl;
1567         ctrl.id = p->id;
1568         ctrl.value = p->value;
1569         if (check_ext_ctrls(&ctrls, 1)) {
1570                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1571
1572                 if (ret == 0)
1573                         p->value = ctrl.value;
1574                 return ret;
1575         }
1576         return -EINVAL;
1577 }
1578
1579 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1580                                 struct file *file, void *fh, void *arg)
1581 {
1582         struct video_device *vfd = video_devdata(file);
1583         struct v4l2_control *p = arg;
1584         struct v4l2_fh *vfh =
1585                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1586         struct v4l2_ext_controls ctrls;
1587         struct v4l2_ext_control ctrl;
1588
1589         if (vfh && vfh->ctrl_handler)
1590                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1591         if (vfd->ctrl_handler)
1592                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1593         if (ops->vidioc_s_ctrl)
1594                 return ops->vidioc_s_ctrl(file, fh, p);
1595         if (ops->vidioc_s_ext_ctrls == NULL)
1596                 return -ENOTTY;
1597
1598         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1599         ctrls.count = 1;
1600         ctrls.controls = &ctrl;
1601         ctrl.id = p->id;
1602         ctrl.value = p->value;
1603         if (check_ext_ctrls(&ctrls, 1))
1604                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1605         return -EINVAL;
1606 }
1607
1608 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1609                                 struct file *file, void *fh, void *arg)
1610 {
1611         struct video_device *vfd = video_devdata(file);
1612         struct v4l2_ext_controls *p = arg;
1613         struct v4l2_fh *vfh =
1614                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1615
1616         p->error_idx = p->count;
1617         if (vfh && vfh->ctrl_handler)
1618                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1619         if (vfd->ctrl_handler)
1620                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1621         if (ops->vidioc_g_ext_ctrls == NULL)
1622                 return -ENOTTY;
1623         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1624                                         -EINVAL;
1625 }
1626
1627 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1628                                 struct file *file, void *fh, void *arg)
1629 {
1630         struct video_device *vfd = video_devdata(file);
1631         struct v4l2_ext_controls *p = arg;
1632         struct v4l2_fh *vfh =
1633                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1634
1635         p->error_idx = p->count;
1636         if (vfh && vfh->ctrl_handler)
1637                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1638         if (vfd->ctrl_handler)
1639                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1640         if (ops->vidioc_s_ext_ctrls == NULL)
1641                 return -ENOTTY;
1642         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1643                                         -EINVAL;
1644 }
1645
1646 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1647                                 struct file *file, void *fh, void *arg)
1648 {
1649         struct video_device *vfd = video_devdata(file);
1650         struct v4l2_ext_controls *p = arg;
1651         struct v4l2_fh *vfh =
1652                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1653
1654         p->error_idx = p->count;
1655         if (vfh && vfh->ctrl_handler)
1656                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1657         if (vfd->ctrl_handler)
1658                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1659         if (ops->vidioc_try_ext_ctrls == NULL)
1660                 return -ENOTTY;
1661         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1662                                         -EINVAL;
1663 }
1664
1665 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1666                                 struct file *file, void *fh, void *arg)
1667 {
1668         struct v4l2_crop *p = arg;
1669         struct v4l2_selection s = {
1670                 .type = p->type,
1671         };
1672         int ret;
1673
1674         if (ops->vidioc_g_crop)
1675                 return ops->vidioc_g_crop(file, fh, p);
1676         /* simulate capture crop using selection api */
1677
1678         /* crop means compose for output devices */
1679         if (V4L2_TYPE_IS_OUTPUT(p->type))
1680                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1681         else
1682                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1683
1684         ret = ops->vidioc_g_selection(file, fh, &s);
1685
1686         /* copying results to old structure on success */
1687         if (!ret)
1688                 p->c = s.r;
1689         return ret;
1690 }
1691
1692 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1693                                 struct file *file, void *fh, void *arg)
1694 {
1695         struct v4l2_crop *p = arg;
1696         struct v4l2_selection s = {
1697                 .type = p->type,
1698                 .r = p->c,
1699         };
1700
1701         if (ops->vidioc_s_crop)
1702                 return ops->vidioc_s_crop(file, fh, p);
1703         /* simulate capture crop using selection api */
1704
1705         /* crop means compose for output devices */
1706         if (V4L2_TYPE_IS_OUTPUT(p->type))
1707                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1708         else
1709                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1710
1711         return ops->vidioc_s_selection(file, fh, &s);
1712 }
1713
1714 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1715                                 struct file *file, void *fh, void *arg)
1716 {
1717         struct v4l2_cropcap *p = arg;
1718         struct v4l2_selection s = { .type = p->type };
1719         int ret;
1720
1721         if (ops->vidioc_cropcap)
1722                 return ops->vidioc_cropcap(file, fh, p);
1723
1724         /* obtaining bounds */
1725         if (V4L2_TYPE_IS_OUTPUT(p->type))
1726                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1727         else
1728                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1729
1730         ret = ops->vidioc_g_selection(file, fh, &s);
1731         if (ret)
1732                 return ret;
1733         p->bounds = s.r;
1734
1735         /* obtaining defrect */
1736         if (V4L2_TYPE_IS_OUTPUT(p->type))
1737                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1738         else
1739                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1740
1741         ret = ops->vidioc_g_selection(file, fh, &s);
1742         if (ret)
1743                 return ret;
1744         p->defrect = s.r;
1745
1746         /* setting trivial pixelaspect */
1747         p->pixelaspect.numerator = 1;
1748         p->pixelaspect.denominator = 1;
1749         return 0;
1750 }
1751
1752 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1753                                 struct file *file, void *fh, void *arg)
1754 {
1755         struct video_device *vfd = video_devdata(file);
1756         int ret;
1757
1758         if (vfd->v4l2_dev)
1759                 pr_info("%s: =================  START STATUS  =================\n",
1760                         vfd->v4l2_dev->name);
1761         ret = ops->vidioc_log_status(file, fh);
1762         if (vfd->v4l2_dev)
1763                 pr_info("%s: ==================  END STATUS  ==================\n",
1764                         vfd->v4l2_dev->name);
1765         return ret;
1766 }
1767
1768 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1769                                 struct file *file, void *fh, void *arg)
1770 {
1771 #ifdef CONFIG_VIDEO_ADV_DEBUG
1772         struct v4l2_dbg_register *p = arg;
1773
1774         if (!capable(CAP_SYS_ADMIN))
1775                 return -EPERM;
1776         return ops->vidioc_g_register(file, fh, p);
1777 #else
1778         return -ENOTTY;
1779 #endif
1780 }
1781
1782 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1783                                 struct file *file, void *fh, void *arg)
1784 {
1785 #ifdef CONFIG_VIDEO_ADV_DEBUG
1786         struct v4l2_dbg_register *p = arg;
1787
1788         if (!capable(CAP_SYS_ADMIN))
1789                 return -EPERM;
1790         return ops->vidioc_s_register(file, fh, p);
1791 #else
1792         return -ENOTTY;
1793 #endif
1794 }
1795
1796 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1797                                 struct file *file, void *fh, void *arg)
1798 {
1799         struct v4l2_dbg_chip_ident *p = arg;
1800
1801         p->ident = V4L2_IDENT_NONE;
1802         p->revision = 0;
1803         return ops->vidioc_g_chip_ident(file, fh, p);
1804 }
1805
1806 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1807                                 struct file *file, void *fh, void *arg)
1808 {
1809         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1810 }
1811
1812 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1813                                 struct file *file, void *fh, void *arg)
1814 {
1815         return ops->vidioc_subscribe_event(fh, arg);
1816 }
1817
1818 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1819                                 struct file *file, void *fh, void *arg)
1820 {
1821         return ops->vidioc_unsubscribe_event(fh, arg);
1822 }
1823
1824 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1825                                 struct file *file, void *fh, void *arg)
1826 {
1827         struct v4l2_sliced_vbi_cap *p = arg;
1828
1829         /* Clear up to type, everything after type is zeroed already */
1830         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1831
1832         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1833 }
1834
1835 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1836                                 struct file *file, void *fh, void *arg)
1837 {
1838         struct video_device *vfd = video_devdata(file);
1839         struct v4l2_frequency_band *p = arg;
1840         enum v4l2_tuner_type type;
1841         int err;
1842
1843         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1844                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1845
1846         if (type != p->type)
1847                 return -EINVAL;
1848         if (ops->vidioc_enum_freq_bands)
1849                 return ops->vidioc_enum_freq_bands(file, fh, p);
1850         if (ops->vidioc_g_tuner) {
1851                 struct v4l2_tuner t = {
1852                         .index = p->tuner,
1853                         .type = type,
1854                 };
1855
1856                 err = ops->vidioc_g_tuner(file, fh, &t);
1857                 if (err)
1858                         return err;
1859                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1860                 p->rangelow = t.rangelow;
1861                 p->rangehigh = t.rangehigh;
1862                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1863                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1864                 return 0;
1865         }
1866         if (ops->vidioc_g_modulator) {
1867                 struct v4l2_modulator m = {
1868                         .index = p->tuner,
1869                 };
1870
1871                 if (type != V4L2_TUNER_RADIO)
1872                         return -EINVAL;
1873                 err = ops->vidioc_g_modulator(file, fh, &m);
1874                 if (err)
1875                         return err;
1876                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1877                 p->rangelow = m.rangelow;
1878                 p->rangehigh = m.rangehigh;
1879                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1880                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1881                 return 0;
1882         }
1883         return -ENOTTY;
1884 }
1885
1886 struct v4l2_ioctl_info {
1887         unsigned int ioctl;
1888         u32 flags;
1889         const char * const name;
1890         union {
1891                 u32 offset;
1892                 int (*func)(const struct v4l2_ioctl_ops *ops,
1893                                 struct file *file, void *fh, void *p);
1894         } u;
1895         void (*debug)(const void *arg, bool write_only);
1896 };
1897
1898 /* This control needs a priority check */
1899 #define INFO_FL_PRIO    (1 << 0)
1900 /* This control can be valid if the filehandle passes a control handler. */
1901 #define INFO_FL_CTRL    (1 << 1)
1902 /* This is a standard ioctl, no need for special code */
1903 #define INFO_FL_STD     (1 << 2)
1904 /* This is ioctl has its own function */
1905 #define INFO_FL_FUNC    (1 << 3)
1906 /* Queuing ioctl */
1907 #define INFO_FL_QUEUE   (1 << 4)
1908 /* Zero struct from after the field to the end */
1909 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1910         ((offsetof(struct v4l2_struct, field) +                 \
1911           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1912 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1913
1914 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1915         [_IOC_NR(_ioctl)] = {                                           \
1916                 .ioctl = _ioctl,                                        \
1917                 .flags = _flags | INFO_FL_STD,                          \
1918                 .name = #_ioctl,                                        \
1919                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1920                 .debug = _debug,                                        \
1921         }
1922
1923 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1924         [_IOC_NR(_ioctl)] = {                                           \
1925                 .ioctl = _ioctl,                                        \
1926                 .flags = _flags | INFO_FL_FUNC,                         \
1927                 .name = #_ioctl,                                        \
1928                 .u.func = _func,                                        \
1929                 .debug = _debug,                                        \
1930         }
1931
1932 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1933         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1934         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1935         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1936         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1937         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1938         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1939         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1940         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1941         IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO),
1942         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1943         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1944         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1945         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1946         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1947         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1948         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1949         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1950         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1951         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1952         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1953         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1954         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1955         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1956         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1957         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1958         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1959         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1960         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
1961         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
1962         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
1963         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
1964         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
1965         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
1966         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
1967         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
1968         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
1969         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
1970         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
1971         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
1972         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
1973         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
1974         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
1975         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
1976         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
1977         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
1978         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
1979         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
1980         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
1981         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
1982         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
1983         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
1984         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)),
1985         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
1986         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
1987         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
1988         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
1989         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
1990         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
1991         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
1992         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1993         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1994         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
1995         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
1996         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
1997         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
1998         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
1999         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2000         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
2001         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
2002         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
2003         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
2004         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2005         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2006         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2007         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2008         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2009         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2010         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2011         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2012         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2013         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2014         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2015 };
2016 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2017
2018 bool v4l2_is_known_ioctl(unsigned int cmd)
2019 {
2020         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2021                 return false;
2022         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2023 }
2024
2025 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2026 {
2027         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2028                 return vdev->lock;
2029         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2030                 return NULL;
2031         if (vdev->queue && vdev->queue->lock &&
2032                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2033                 return vdev->queue->lock;
2034         return vdev->lock;
2035 }
2036
2037 /* Common ioctl debug function. This function can be used by
2038    external ioctl messages as well as internal V4L ioctl */
2039 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2040 {
2041         const char *dir, *type;
2042
2043         if (prefix)
2044                 printk(KERN_DEBUG "%s: ", prefix);
2045
2046         switch (_IOC_TYPE(cmd)) {
2047         case 'd':
2048                 type = "v4l2_int";
2049                 break;
2050         case 'V':
2051                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2052                         type = "v4l2";
2053                         break;
2054                 }
2055                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2056                 return;
2057         default:
2058                 type = "unknown";
2059                 break;
2060         }
2061
2062         switch (_IOC_DIR(cmd)) {
2063         case _IOC_NONE:              dir = "--"; break;
2064         case _IOC_READ:              dir = "r-"; break;
2065         case _IOC_WRITE:             dir = "-w"; break;
2066         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2067         default:                     dir = "*ERR*"; break;
2068         }
2069         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2070                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2071 }
2072 EXPORT_SYMBOL(v4l_printk_ioctl);
2073
2074 static long __video_do_ioctl(struct file *file,
2075                 unsigned int cmd, void *arg)
2076 {
2077         struct video_device *vfd = video_devdata(file);
2078         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2079         bool write_only = false;
2080         struct v4l2_ioctl_info default_info;
2081         const struct v4l2_ioctl_info *info;
2082         void *fh = file->private_data;
2083         struct v4l2_fh *vfh = NULL;
2084         int use_fh_prio = 0;
2085         int debug = vfd->debug;
2086         long ret = -ENOTTY;
2087
2088         if (ops == NULL) {
2089                 pr_warn("%s: has no ioctl_ops.\n",
2090                                 video_device_node_name(vfd));
2091                 return ret;
2092         }
2093
2094         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2095                 vfh = file->private_data;
2096                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2097         }
2098
2099         if (v4l2_is_known_ioctl(cmd)) {
2100                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2101
2102                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2103                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2104                         goto done;
2105
2106                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2107                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2108                         if (ret)
2109                                 goto done;
2110                 }
2111         } else {
2112                 default_info.ioctl = cmd;
2113                 default_info.flags = 0;
2114                 default_info.debug = v4l_print_default;
2115                 info = &default_info;
2116         }
2117
2118         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2119         if (write_only && debug > V4L2_DEBUG_IOCTL) {
2120                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2121                 pr_cont(": ");
2122                 info->debug(arg, write_only);
2123         }
2124         if (info->flags & INFO_FL_STD) {
2125                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2126                 const void *p = vfd->ioctl_ops;
2127                 const vidioc_op *vidioc = p + info->u.offset;
2128
2129                 ret = (*vidioc)(file, fh, arg);
2130         } else if (info->flags & INFO_FL_FUNC) {
2131                 ret = info->u.func(ops, file, fh, arg);
2132         } else if (!ops->vidioc_default) {
2133                 ret = -ENOTTY;
2134         } else {
2135                 ret = ops->vidioc_default(file, fh,
2136                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2137                         cmd, arg);
2138         }
2139
2140 done:
2141         if (debug) {
2142                 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2143                         if (ret < 0)
2144                                 printk(KERN_DEBUG "%s: error %ld\n",
2145                                         video_device_node_name(vfd), ret);
2146                         return ret;
2147                 }
2148                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2149                 if (ret < 0)
2150                         pr_cont(": error %ld\n", ret);
2151                 else if (debug == V4L2_DEBUG_IOCTL)
2152                         pr_cont("\n");
2153                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2154                         info->debug(arg, write_only);
2155                 else {
2156                         pr_cont(": ");
2157                         info->debug(arg, write_only);
2158                 }
2159         }
2160
2161         return ret;
2162 }
2163
2164 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2165                             void * __user *user_ptr, void ***kernel_ptr)
2166 {
2167         int ret = 0;
2168
2169         switch (cmd) {
2170         case VIDIOC_QUERYBUF:
2171         case VIDIOC_QBUF:
2172         case VIDIOC_DQBUF: {
2173                 struct v4l2_buffer *buf = parg;
2174
2175                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2176                         if (buf->length > VIDEO_MAX_PLANES) {
2177                                 ret = -EINVAL;
2178                                 break;
2179                         }
2180                         *user_ptr = (void __user *)buf->m.planes;
2181                         *kernel_ptr = (void *)&buf->m.planes;
2182                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2183                         ret = 1;
2184                 }
2185                 break;
2186         }
2187
2188         case VIDIOC_S_EXT_CTRLS:
2189         case VIDIOC_G_EXT_CTRLS:
2190         case VIDIOC_TRY_EXT_CTRLS: {
2191                 struct v4l2_ext_controls *ctrls = parg;
2192
2193                 if (ctrls->count != 0) {
2194                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2195                                 ret = -EINVAL;
2196                                 break;
2197                         }
2198                         *user_ptr = (void __user *)ctrls->controls;
2199                         *kernel_ptr = (void *)&ctrls->controls;
2200                         *array_size = sizeof(struct v4l2_ext_control)
2201                                     * ctrls->count;
2202                         ret = 1;
2203                 }
2204                 break;
2205         }
2206         }
2207
2208         return ret;
2209 }
2210
2211 long
2212 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2213                v4l2_kioctl func)
2214 {
2215         char    sbuf[128];
2216         void    *mbuf = NULL;
2217         void    *parg = (void *)arg;
2218         long    err  = -EINVAL;
2219         bool    has_array_args;
2220         size_t  array_size = 0;
2221         void __user *user_ptr = NULL;
2222         void    **kernel_ptr = NULL;
2223
2224         /*  Copy arguments into temp kernel buffer  */
2225         if (_IOC_DIR(cmd) != _IOC_NONE) {
2226                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2227                         parg = sbuf;
2228                 } else {
2229                         /* too big to allocate from stack */
2230                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2231                         if (NULL == mbuf)
2232                                 return -ENOMEM;
2233                         parg = mbuf;
2234                 }
2235
2236                 err = -EFAULT;
2237                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2238                         unsigned int n = _IOC_SIZE(cmd);
2239
2240                         /*
2241                          * In some cases, only a few fields are used as input,
2242                          * i.e. when the app sets "index" and then the driver
2243                          * fills in the rest of the structure for the thing
2244                          * with that index.  We only need to copy up the first
2245                          * non-input field.
2246                          */
2247                         if (v4l2_is_known_ioctl(cmd)) {
2248                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2249                                 if (flags & INFO_FL_CLEAR_MASK)
2250                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2251                         }
2252
2253                         if (copy_from_user(parg, (void __user *)arg, n))
2254                                 goto out;
2255
2256                         /* zero out anything we don't copy from userspace */
2257                         if (n < _IOC_SIZE(cmd))
2258                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2259                 } else {
2260                         /* read-only ioctl */
2261                         memset(parg, 0, _IOC_SIZE(cmd));
2262                 }
2263         }
2264
2265         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2266         if (err < 0)
2267                 goto out;
2268         has_array_args = err;
2269
2270         if (has_array_args) {
2271                 /*
2272                  * When adding new types of array args, make sure that the
2273                  * parent argument to ioctl (which contains the pointer to the
2274                  * array) fits into sbuf (so that mbuf will still remain
2275                  * unused up to here).
2276                  */
2277                 mbuf = kmalloc(array_size, GFP_KERNEL);
2278                 err = -ENOMEM;
2279                 if (NULL == mbuf)
2280                         goto out_array_args;
2281                 err = -EFAULT;
2282                 if (copy_from_user(mbuf, user_ptr, array_size))
2283                         goto out_array_args;
2284                 *kernel_ptr = mbuf;
2285         }
2286
2287         /* Handles IOCTL */
2288         err = func(file, cmd, parg);
2289         if (err == -ENOIOCTLCMD)
2290                 err = -ENOTTY;
2291
2292         if (has_array_args) {
2293                 *kernel_ptr = user_ptr;
2294                 if (copy_to_user(user_ptr, mbuf, array_size))
2295                         err = -EFAULT;
2296                 goto out_array_args;
2297         }
2298         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2299            results that must be returned. */
2300         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2301                 goto out;
2302
2303 out_array_args:
2304         /*  Copy results into user buffer  */
2305         switch (_IOC_DIR(cmd)) {
2306         case _IOC_READ:
2307         case (_IOC_WRITE | _IOC_READ):
2308                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2309                         err = -EFAULT;
2310                 break;
2311         }
2312
2313 out:
2314         kfree(mbuf);
2315         return err;
2316 }
2317 EXPORT_SYMBOL(video_usercopy);
2318
2319 long video_ioctl2(struct file *file,
2320                unsigned int cmd, unsigned long arg)
2321 {
2322         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2323 }
2324 EXPORT_SYMBOL(video_ioctl2);