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_u32(const void *arg, bool write_only)
 829 {
 830         pr_cont("value=%u\n", *(const u32 *)arg);
 831 }
 832
 833 static void v4l_print_newline(const void *arg, bool write_only)
 834 {
 835         pr_cont("\n");
 836 }
 837
 838 static void v4l_print_default(const void *arg, bool write_only)
 839 {
 840         pr_cont("driver-specific ioctl\n");
 841 }
 842
 843 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 844 {
 845         __u32 i;
 846
 847         /* zero the reserved fields */
 848         c->reserved[0] = c->reserved[1] = 0;
 849         for (i = 0; i < c->count; i++)
 850                 c->controls[i].reserved2[0] = 0;
 851
 852         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 853            when using extended controls.
 854            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 855            is it allowed for backwards compatibility.
 856          */
 857         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 858                 return 0;
 859         /* Check that all controls are from the same control class. */
 860         for (i = 0; i < c->count; i++) {
 861                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 862                         c->error_idx = i;
 863                         return 0;
 864                 }
 865         }
 866         return 1;
 867 }
 868
 869 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 870 {
 871         if (ops == NULL)
 872                 return -EINVAL;
 873
 874         switch (type) {
 875         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 876                 if (ops->vidioc_g_fmt_vid_cap ||
 877                                 ops->vidioc_g_fmt_vid_cap_mplane)
 878                         return 0;
 879                 break;
 880         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 881                 if (ops->vidioc_g_fmt_vid_cap_mplane)
 882                         return 0;
 883                 break;
 884         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 885                 if (ops->vidioc_g_fmt_vid_overlay)
 886                         return 0;
 887                 break;
 888         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 889                 if (ops->vidioc_g_fmt_vid_out ||
 890                                 ops->vidioc_g_fmt_vid_out_mplane)
 891                         return 0;
 892                 break;
 893         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 894                 if (ops->vidioc_g_fmt_vid_out_mplane)
 895                         return 0;
 896                 break;
 897         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 898                 if (ops->vidioc_g_fmt_vid_out_overlay)
 899                         return 0;
 900                 break;
 901         case V4L2_BUF_TYPE_VBI_CAPTURE:
 902                 if (ops->vidioc_g_fmt_vbi_cap)
 903                         return 0;
 904                 break;
 905         case V4L2_BUF_TYPE_VBI_OUTPUT:
 906                 if (ops->vidioc_g_fmt_vbi_out)
 907                         return 0;
 908                 break;
 909         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 910                 if (ops->vidioc_g_fmt_sliced_vbi_cap)
 911                         return 0;
 912                 break;
 913         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 914                 if (ops->vidioc_g_fmt_sliced_vbi_out)
 915                         return 0;
 916                 break;
 917         case V4L2_BUF_TYPE_PRIVATE:
 918                 if (ops->vidioc_g_fmt_type_private)
 919                         return 0;
 920                 break;
 921         }
 922         return -EINVAL;
 923 }
 924
 925 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 926                                 struct file *file, void *fh, void *arg)
 927 {
 928         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 929
 930         cap->version = LINUX_VERSION_CODE;
 931         return ops->vidioc_querycap(file, fh, cap);
 932 }
 933
 934 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 935                                 struct file *file, void *fh, void *arg)
 936 {
 937         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 938 }
 939
 940 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 941                                 struct file *file, void *fh, void *arg)
 942 {
 943         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 944 }
 945
 946 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 947                                 struct file *file, void *fh, void *arg)
 948 {
 949         struct video_device *vfd;
 950         u32 *p = arg;
 951
 952         if (ops->vidioc_g_priority)
 953                 return ops->vidioc_g_priority(file, fh, arg);
 954         vfd = video_devdata(file);
 955         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 956         return 0;
 957 }
 958
 959 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 960                                 struct file *file, void *fh, void *arg)
 961 {
 962         struct video_device *vfd;
 963         struct v4l2_fh *vfh;
 964         u32 *p = arg;
 965
 966         if (ops->vidioc_s_priority)
 967                 return ops->vidioc_s_priority(file, fh, *p);
 968         vfd = video_devdata(file);
 969         vfh = file->private_data;
 970         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
 971 }
 972
 973 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
 974                                 struct file *file, void *fh, void *arg)
 975 {
 976         struct v4l2_input *p = arg;
 977
 978         /*
 979          * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
 980          * CAP_STD here based on ioctl handler provided by the
 981          * driver. If the driver doesn't support these
 982          * for a specific input, it must override these flags.
 983          */
 984         if (ops->vidioc_s_std)
 985                 p->capabilities |= V4L2_IN_CAP_STD;
 986         if (ops->vidioc_s_dv_preset)
 987                 p->capabilities |= V4L2_IN_CAP_PRESETS;
 988         if (ops->vidioc_s_dv_timings)
 989                 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
 990
 991         return ops->vidioc_enum_input(file, fh, p);
 992 }
 993
 994 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
 995                                 struct file *file, void *fh, void *arg)
 996 {
 997         struct v4l2_output *p = arg;
 998
 999         /*
1000          * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1001          * CAP_STD here based on ioctl handler provided by the
1002          * driver. If the driver doesn't support these
1003          * for a specific output, it must override these flags.
1004          */
1005         if (ops->vidioc_s_std)
1006                 p->capabilities |= V4L2_OUT_CAP_STD;
1007         if (ops->vidioc_s_dv_preset)
1008                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1009         if (ops->vidioc_s_dv_timings)
1010                 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1011
1012         return ops->vidioc_enum_output(file, fh, p);
1013 }
1014
1015 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1016                                 struct file *file, void *fh, void *arg)
1017 {
1018         struct v4l2_fmtdesc *p = arg;
1019
1020         switch (p->type) {
1021         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1022                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1023                         break;
1024                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1025         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1026                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1027                         break;
1028                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1029         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1030                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1031                         break;
1032                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1033         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1034                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1035                         break;
1036                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1037         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1038                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1039                         break;
1040                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1041         case V4L2_BUF_TYPE_PRIVATE:
1042                 if (unlikely(!ops->vidioc_enum_fmt_type_private))
1043                         break;
1044                 return ops->vidioc_enum_fmt_type_private(file, fh, arg);
1045         }
1046         return -EINVAL;
1047 }
1048
1049 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1050                                 struct file *file, void *fh, void *arg)
1051 {
1052         struct v4l2_format *p = arg;
1053
1054         switch (p->type) {
1055         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1056                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1057                         break;
1058                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1059         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1060                 if (unlikely(!ops->vidioc_g_fmt_vid_cap_mplane))
1061                         break;
1062                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1063         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1064                 if (unlikely(!ops->vidioc_g_fmt_vid_overlay))
1065                         break;
1066                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1067         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1068                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1069                         break;
1070                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1071         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1072                 if (unlikely(!ops->vidioc_g_fmt_vid_out_mplane))
1073                         break;
1074                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1075         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1076                 if (unlikely(!ops->vidioc_g_fmt_vid_out_overlay))
1077                         break;
1078                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1079         case V4L2_BUF_TYPE_VBI_CAPTURE:
1080                 if (unlikely(!ops->vidioc_g_fmt_vbi_cap))
1081                         break;
1082                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1083         case V4L2_BUF_TYPE_VBI_OUTPUT:
1084                 if (unlikely(!ops->vidioc_g_fmt_vbi_out))
1085                         break;
1086                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1087         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1088                 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_cap))
1089                         break;
1090                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1091         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1092                 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_out))
1093                         break;
1094                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1095         case V4L2_BUF_TYPE_PRIVATE:
1096                 if (unlikely(!ops->vidioc_g_fmt_type_private))
1097                         break;
1098                 return ops->vidioc_g_fmt_type_private(file, fh, arg);
1099         }
1100         return -EINVAL;
1101 }
1102
1103 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1104                                 struct file *file, void *fh, void *arg)
1105 {
1106         struct v4l2_format *p = arg;
1107
1108         switch (p->type) {
1109         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1110                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1111                         break;
1112                 CLEAR_AFTER_FIELD(p, fmt.pix);
1113                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1114         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1115                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1116                         break;
1117                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1118                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1119         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1120                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1121                         break;
1122                 CLEAR_AFTER_FIELD(p, fmt.win);
1123                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1124         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1125                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1126                         break;
1127                 CLEAR_AFTER_FIELD(p, fmt.pix);
1128                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1129         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1130                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1131                         break;
1132                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1133                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1134         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1135                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1136                         break;
1137                 CLEAR_AFTER_FIELD(p, fmt.win);
1138                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1139         case V4L2_BUF_TYPE_VBI_CAPTURE:
1140                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1141                         break;
1142                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1143                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1144         case V4L2_BUF_TYPE_VBI_OUTPUT:
1145                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1146                         break;
1147                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1148                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1149         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1150                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1151                         break;
1152                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1153                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1154         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1155                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1156                         break;
1157                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1158                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1159         case V4L2_BUF_TYPE_PRIVATE:
1160                 if (unlikely(!ops->vidioc_s_fmt_type_private))
1161                         break;
1162                 return ops->vidioc_s_fmt_type_private(file, fh, arg);
1163         }
1164         return -EINVAL;
1165 }
1166
1167 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1168                                 struct file *file, void *fh, void *arg)
1169 {
1170         struct v4l2_format *p = arg;
1171
1172         switch (p->type) {
1173         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1174                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1175                         break;
1176                 CLEAR_AFTER_FIELD(p, fmt.pix);
1177                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1178         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1179                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1180                         break;
1181                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1182                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1183         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1184                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1185                         break;
1186                 CLEAR_AFTER_FIELD(p, fmt.win);
1187                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1188         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1189                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1190                         break;
1191                 CLEAR_AFTER_FIELD(p, fmt.pix);
1192                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1193         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1194                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1195                         break;
1196                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1197                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1198         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1199                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1200                         break;
1201                 CLEAR_AFTER_FIELD(p, fmt.win);
1202                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1203         case V4L2_BUF_TYPE_VBI_CAPTURE:
1204                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1205                         break;
1206                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1207                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1208         case V4L2_BUF_TYPE_VBI_OUTPUT:
1209                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1210                         break;
1211                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1212                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1213         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1214                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1215                         break;
1216                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1217                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1218         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1219                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1220                         break;
1221                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1222                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1223         case V4L2_BUF_TYPE_PRIVATE:
1224                 if (unlikely(!ops->vidioc_try_fmt_type_private))
1225                         break;
1226                 return ops->vidioc_try_fmt_type_private(file, fh, arg);
1227         }
1228         return -EINVAL;
1229 }
1230
1231 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1232                                 struct file *file, void *fh, void *arg)
1233 {
1234         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1235 }
1236
1237 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1238                                 struct file *file, void *fh, void *arg)
1239 {
1240         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1241 }
1242
1243 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1244                                 struct file *file, void *fh, void *arg)
1245 {
1246         struct video_device *vfd = video_devdata(file);
1247         struct v4l2_tuner *p = arg;
1248
1249         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1250                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1251         return ops->vidioc_g_tuner(file, fh, p);
1252 }
1253
1254 static int v4l_s_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
1260         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1261                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1262         return ops->vidioc_s_tuner(file, fh, p);
1263 }
1264
1265 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1266                                 struct file *file, void *fh, void *arg)
1267 {
1268         struct video_device *vfd = video_devdata(file);
1269         struct v4l2_frequency *p = arg;
1270
1271         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1272                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1273         return ops->vidioc_g_frequency(file, fh, p);
1274 }
1275
1276 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1277                                 struct file *file, void *fh, void *arg)
1278 {
1279         struct video_device *vfd = video_devdata(file);
1280         struct v4l2_frequency *p = arg;
1281         enum v4l2_tuner_type type;
1282
1283         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1284                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1285         if (p->type != type)
1286                 return -EINVAL;
1287         return ops->vidioc_s_frequency(file, fh, p);
1288 }
1289
1290 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1291                                 struct file *file, void *fh, void *arg)
1292 {
1293         struct video_device *vfd = video_devdata(file);
1294         struct v4l2_standard *p = arg;
1295         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1296         unsigned int index = p->index, i, j = 0;
1297         const char *descr = "";
1298
1299         /* Return norm array in a canonical way */
1300         for (i = 0; i <= index && id; i++) {
1301                 /* last std value in the standards array is 0, so this
1302                    while always ends there since (id & 0) == 0. */
1303                 while ((id & standards[j].std) != standards[j].std)
1304                         j++;
1305                 curr_id = standards[j].std;
1306                 descr = standards[j].descr;
1307                 j++;
1308                 if (curr_id == 0)
1309                         break;
1310                 if (curr_id != V4L2_STD_PAL &&
1311                                 curr_id != V4L2_STD_SECAM &&
1312                                 curr_id != V4L2_STD_NTSC)
1313                         id &= ~curr_id;
1314         }
1315         if (i <= index)
1316                 return -EINVAL;
1317
1318         v4l2_video_std_construct(p, curr_id, descr);
1319         return 0;
1320 }
1321
1322 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1323                                 struct file *file, void *fh, void *arg)
1324 {
1325         struct video_device *vfd = video_devdata(file);
1326         v4l2_std_id *id = arg;
1327
1328         /* Calls the specific handler */
1329         if (ops->vidioc_g_std)
1330                 return ops->vidioc_g_std(file, fh, arg);
1331         if (vfd->current_norm) {
1332                 *id = vfd->current_norm;
1333                 return 0;
1334         }
1335         return -ENOTTY;
1336 }
1337
1338 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1339                                 struct file *file, void *fh, void *arg)
1340 {
1341         struct video_device *vfd = video_devdata(file);
1342         v4l2_std_id *id = arg, norm;
1343         int ret;
1344
1345         norm = (*id) & vfd->tvnorms;
1346         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1347                 return -EINVAL;
1348
1349         /* Calls the specific handler */
1350         ret = ops->vidioc_s_std(file, fh, &norm);
1351
1352         /* Updates standard information */
1353         if (ret >= 0)
1354                 vfd->current_norm = norm;
1355         return ret;
1356 }
1357
1358 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1359                                 struct file *file, void *fh, void *arg)
1360 {
1361         struct video_device *vfd = video_devdata(file);
1362         v4l2_std_id *p = arg;
1363
1364         /*
1365          * If nothing detected, it should return all supported
1366          * standard.
1367          * Drivers just need to mask the std argument, in order
1368          * to remove the standards that don't apply from the mask.
1369          * This means that tuners, audio and video decoders can join
1370          * their efforts to improve the standards detection.
1371          */
1372         *p = vfd->tvnorms;
1373         return ops->vidioc_querystd(file, fh, arg);
1374 }
1375
1376 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1377                                 struct file *file, void *fh, void *arg)
1378 {
1379         struct video_device *vfd = video_devdata(file);
1380         struct v4l2_hw_freq_seek *p = arg;
1381         enum v4l2_tuner_type type;
1382
1383         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1384                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1385         if (p->type != type)
1386                 return -EINVAL;
1387         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1388 }
1389
1390 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1391                                 struct file *file, void *fh, void *arg)
1392 {
1393         struct v4l2_requestbuffers *p = arg;
1394         int ret = check_fmt(ops, p->type);
1395
1396         if (ret)
1397                 return ret;
1398
1399         if (p->type < V4L2_BUF_TYPE_PRIVATE)
1400                 CLEAR_AFTER_FIELD(p, memory);
1401
1402         return ops->vidioc_reqbufs(file, fh, p);
1403 }
1404
1405 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1406                                 struct file *file, void *fh, void *arg)
1407 {
1408         struct v4l2_buffer *p = arg;
1409         int ret = check_fmt(ops, p->type);
1410
1411         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1412 }
1413
1414 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1415                                 struct file *file, void *fh, void *arg)
1416 {
1417         struct v4l2_buffer *p = arg;
1418         int ret = check_fmt(ops, p->type);
1419
1420         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1421 }
1422
1423 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1424                                 struct file *file, void *fh, void *arg)
1425 {
1426         struct v4l2_buffer *p = arg;
1427         int ret = check_fmt(ops, p->type);
1428
1429         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1430 }
1431
1432 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1433                                 struct file *file, void *fh, void *arg)
1434 {
1435         struct v4l2_create_buffers *create = arg;
1436         int ret = check_fmt(ops, create->format.type);
1437
1438         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1439 }
1440
1441 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1442                                 struct file *file, void *fh, void *arg)
1443 {
1444         struct v4l2_buffer *b = arg;
1445         int ret = check_fmt(ops, b->type);
1446
1447         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1448 }
1449
1450 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1451                                 struct file *file, void *fh, void *arg)
1452 {
1453         struct video_device *vfd = video_devdata(file);
1454         struct v4l2_streamparm *p = arg;
1455         v4l2_std_id std;
1456         int ret = check_fmt(ops, p->type);
1457
1458         if (ret)
1459                 return ret;
1460         if (ops->vidioc_g_parm)
1461                 return ops->vidioc_g_parm(file, fh, p);
1462         std = vfd->current_norm;
1463         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1464             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1465                 return -EINVAL;
1466         p->parm.capture.readbuffers = 2;
1467         if (ops->vidioc_g_std)
1468                 ret = ops->vidioc_g_std(file, fh, &std);
1469         if (ret == 0)
1470                 v4l2_video_std_frame_period(std,
1471                             &p->parm.capture.timeperframe);
1472         return ret;
1473 }
1474
1475 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1476                                 struct file *file, void *fh, void *arg)
1477 {
1478         struct v4l2_streamparm *p = arg;
1479         int ret = check_fmt(ops, p->type);
1480
1481         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1482 }
1483
1484 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1485                                 struct file *file, void *fh, void *arg)
1486 {
1487         struct video_device *vfd = video_devdata(file);
1488         struct v4l2_queryctrl *p = arg;
1489         struct v4l2_fh *vfh = fh;
1490
1491         if (vfh && vfh->ctrl_handler)
1492                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1493         if (vfd->ctrl_handler)
1494                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1495         if (ops->vidioc_queryctrl)
1496                 return ops->vidioc_queryctrl(file, fh, p);
1497         return -ENOTTY;
1498 }
1499
1500 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1501                                 struct file *file, void *fh, void *arg)
1502 {
1503         struct video_device *vfd = video_devdata(file);
1504         struct v4l2_querymenu *p = arg;
1505         struct v4l2_fh *vfh = fh;
1506
1507         if (vfh && vfh->ctrl_handler)
1508                 return v4l2_querymenu(vfh->ctrl_handler, p);
1509         if (vfd->ctrl_handler)
1510                 return v4l2_querymenu(vfd->ctrl_handler, p);
1511         if (ops->vidioc_querymenu)
1512                 return ops->vidioc_querymenu(file, fh, p);
1513         return -ENOTTY;
1514 }
1515
1516 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1517                                 struct file *file, void *fh, void *arg)
1518 {
1519         struct video_device *vfd = video_devdata(file);
1520         struct v4l2_control *p = arg;
1521         struct v4l2_fh *vfh = fh;
1522         struct v4l2_ext_controls ctrls;
1523         struct v4l2_ext_control ctrl;
1524
1525         if (vfh && vfh->ctrl_handler)
1526                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1527         if (vfd->ctrl_handler)
1528                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1529         if (ops->vidioc_g_ctrl)
1530                 return ops->vidioc_g_ctrl(file, fh, p);
1531         if (ops->vidioc_g_ext_ctrls == NULL)
1532                 return -ENOTTY;
1533
1534         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1535         ctrls.count = 1;
1536         ctrls.controls = &ctrl;
1537         ctrl.id = p->id;
1538         ctrl.value = p->value;
1539         if (check_ext_ctrls(&ctrls, 1)) {
1540                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1541
1542                 if (ret == 0)
1543                         p->value = ctrl.value;
1544                 return ret;
1545         }
1546         return -EINVAL;
1547 }
1548
1549 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1550                                 struct file *file, void *fh, void *arg)
1551 {
1552         struct video_device *vfd = video_devdata(file);
1553         struct v4l2_control *p = arg;
1554         struct v4l2_fh *vfh = fh;
1555         struct v4l2_ext_controls ctrls;
1556         struct v4l2_ext_control ctrl;
1557
1558         if (vfh && vfh->ctrl_handler)
1559                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1560         if (vfd->ctrl_handler)
1561                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1562         if (ops->vidioc_s_ctrl)
1563                 return ops->vidioc_s_ctrl(file, fh, p);
1564         if (ops->vidioc_s_ext_ctrls == NULL)
1565                 return -ENOTTY;
1566
1567         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1568         ctrls.count = 1;
1569         ctrls.controls = &ctrl;
1570         ctrl.id = p->id;
1571         ctrl.value = p->value;
1572         if (check_ext_ctrls(&ctrls, 1))
1573                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1574         return -EINVAL;
1575 }
1576
1577 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1578                                 struct file *file, void *fh, void *arg)
1579 {
1580         struct video_device *vfd = video_devdata(file);
1581         struct v4l2_ext_controls *p = arg;
1582         struct v4l2_fh *vfh = fh;
1583
1584         p->error_idx = p->count;
1585         if (vfh && vfh->ctrl_handler)
1586                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1587         if (vfd->ctrl_handler)
1588                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1589         if (ops->vidioc_g_ext_ctrls == NULL)
1590                 return -ENOTTY;
1591         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1592                                         -EINVAL;
1593 }
1594
1595 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1596                                 struct file *file, void *fh, void *arg)
1597 {
1598         struct video_device *vfd = video_devdata(file);
1599         struct v4l2_ext_controls *p = arg;
1600         struct v4l2_fh *vfh = fh;
1601
1602         p->error_idx = p->count;
1603         if (vfh && vfh->ctrl_handler)
1604                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1605         if (vfd->ctrl_handler)
1606                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1607         if (ops->vidioc_s_ext_ctrls == NULL)
1608                 return -ENOTTY;
1609         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1610                                         -EINVAL;
1611 }
1612
1613 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1614                                 struct file *file, void *fh, void *arg)
1615 {
1616         struct video_device *vfd = video_devdata(file);
1617         struct v4l2_ext_controls *p = arg;
1618         struct v4l2_fh *vfh = fh;
1619
1620         p->error_idx = p->count;
1621         if (vfh && vfh->ctrl_handler)
1622                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1623         if (vfd->ctrl_handler)
1624                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1625         if (ops->vidioc_try_ext_ctrls == NULL)
1626                 return -ENOTTY;
1627         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1628                                         -EINVAL;
1629 }
1630
1631 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1632                                 struct file *file, void *fh, void *arg)
1633 {
1634         struct v4l2_crop *p = arg;
1635         struct v4l2_selection s = {
1636                 .type = p->type,
1637         };
1638         int ret;
1639
1640         if (ops->vidioc_g_crop)
1641                 return ops->vidioc_g_crop(file, fh, p);
1642         /* simulate capture crop using selection api */
1643
1644         /* crop means compose for output devices */
1645         if (V4L2_TYPE_IS_OUTPUT(p->type))
1646                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1647         else
1648                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1649
1650         ret = ops->vidioc_g_selection(file, fh, &s);
1651
1652         /* copying results to old structure on success */
1653         if (!ret)
1654                 p->c = s.r;
1655         return ret;
1656 }
1657
1658 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1659                                 struct file *file, void *fh, void *arg)
1660 {
1661         struct v4l2_crop *p = arg;
1662         struct v4l2_selection s = {
1663                 .type = p->type,
1664                 .r = p->c,
1665         };
1666
1667         if (ops->vidioc_s_crop)
1668                 return ops->vidioc_s_crop(file, fh, p);
1669         /* simulate capture crop using selection api */
1670
1671         /* crop means compose for output devices */
1672         if (V4L2_TYPE_IS_OUTPUT(p->type))
1673                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1674         else
1675                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1676
1677         return ops->vidioc_s_selection(file, fh, &s);
1678 }
1679
1680 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1681                                 struct file *file, void *fh, void *arg)
1682 {
1683         struct v4l2_cropcap *p = arg;
1684         struct v4l2_selection s = { .type = p->type };
1685         int ret;
1686
1687         if (ops->vidioc_cropcap)
1688                 return ops->vidioc_cropcap(file, fh, p);
1689
1690         /* obtaining bounds */
1691         if (V4L2_TYPE_IS_OUTPUT(p->type))
1692                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1693         else
1694                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1695
1696         ret = ops->vidioc_g_selection(file, fh, &s);
1697         if (ret)
1698                 return ret;
1699         p->bounds = s.r;
1700
1701         /* obtaining defrect */
1702         if (V4L2_TYPE_IS_OUTPUT(p->type))
1703                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1704         else
1705                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1706
1707         ret = ops->vidioc_g_selection(file, fh, &s);
1708         if (ret)
1709                 return ret;
1710         p->defrect = s.r;
1711
1712         /* setting trivial pixelaspect */
1713         p->pixelaspect.numerator = 1;
1714         p->pixelaspect.denominator = 1;
1715         return 0;
1716 }
1717
1718 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1719                                 struct file *file, void *fh, void *arg)
1720 {
1721         struct video_device *vfd = video_devdata(file);
1722         int ret;
1723
1724         if (vfd->v4l2_dev)
1725                 pr_info("%s: =================  START STATUS  =================\n",
1726                         vfd->v4l2_dev->name);
1727         ret = ops->vidioc_log_status(file, fh);
1728         if (vfd->v4l2_dev)
1729                 pr_info("%s: ==================  END STATUS  ==================\n",
1730                         vfd->v4l2_dev->name);
1731         return ret;
1732 }
1733
1734 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1735                                 struct file *file, void *fh, void *arg)
1736 {
1737 #ifdef CONFIG_VIDEO_ADV_DEBUG
1738         struct v4l2_dbg_register *p = arg;
1739
1740         if (!capable(CAP_SYS_ADMIN))
1741                 return -EPERM;
1742         return ops->vidioc_g_register(file, fh, p);
1743 #else
1744         return -ENOTTY;
1745 #endif
1746 }
1747
1748 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1749                                 struct file *file, void *fh, void *arg)
1750 {
1751 #ifdef CONFIG_VIDEO_ADV_DEBUG
1752         struct v4l2_dbg_register *p = arg;
1753
1754         if (!capable(CAP_SYS_ADMIN))
1755                 return -EPERM;
1756         return ops->vidioc_s_register(file, fh, p);
1757 #else
1758         return -ENOTTY;
1759 #endif
1760 }
1761
1762 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1763                                 struct file *file, void *fh, void *arg)
1764 {
1765         struct v4l2_dbg_chip_ident *p = arg;
1766
1767         p->ident = V4L2_IDENT_NONE;
1768         p->revision = 0;
1769         return ops->vidioc_g_chip_ident(file, fh, p);
1770 }
1771
1772 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1773                                 struct file *file, void *fh, void *arg)
1774 {
1775         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1776 }
1777
1778 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1779                                 struct file *file, void *fh, void *arg)
1780 {
1781         return ops->vidioc_subscribe_event(fh, arg);
1782 }
1783
1784 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1785                                 struct file *file, void *fh, void *arg)
1786 {
1787         return ops->vidioc_unsubscribe_event(fh, arg);
1788 }
1789
1790 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1791                                 struct file *file, void *fh, void *arg)
1792 {
1793         struct v4l2_sliced_vbi_cap *p = arg;
1794
1795         /* Clear up to type, everything after type is zeroed already */
1796         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1797
1798         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1799 }
1800
1801 struct v4l2_ioctl_info {
1802         unsigned int ioctl;
1803         u32 flags;
1804         const char * const name;
1805         union {
1806                 u32 offset;
1807                 int (*func)(const struct v4l2_ioctl_ops *ops,
1808                                 struct file *file, void *fh, void *p);
1809         };
1810         void (*debug)(const void *arg, bool write_only);
1811 };
1812
1813 /* This control needs a priority check */
1814 #define INFO_FL_PRIO    (1 << 0)
1815 /* This control can be valid if the filehandle passes a control handler. */
1816 #define INFO_FL_CTRL    (1 << 1)
1817 /* This is a standard ioctl, no need for special code */
1818 #define INFO_FL_STD     (1 << 2)
1819 /* This is ioctl has its own function */
1820 #define INFO_FL_FUNC    (1 << 3)
1821 /* Queuing ioctl */
1822 #define INFO_FL_QUEUE   (1 << 4)
1823 /* Zero struct from after the field to the end */
1824 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1825         ((offsetof(struct v4l2_struct, field) +                 \
1826           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1827 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1828
1829 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1830         [_IOC_NR(_ioctl)] = {                                           \
1831                 .ioctl = _ioctl,                                        \
1832                 .flags = _flags | INFO_FL_STD,                          \
1833                 .name = #_ioctl,                                        \
1834                 .offset = offsetof(struct v4l2_ioctl_ops, _vidioc),     \
1835                 .debug = _debug,                                        \
1836         }
1837
1838 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1839         [_IOC_NR(_ioctl)] = {                                           \
1840                 .ioctl = _ioctl,                                        \
1841                 .flags = _flags | INFO_FL_FUNC,                         \
1842                 .name = #_ioctl,                                        \
1843                 .func = _func,                                          \
1844                 .debug = _debug,                                        \
1845         }
1846
1847 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1848         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1849         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1850         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1851         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1852         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1853         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1854         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1855         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1856         IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO),
1857         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1858         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1859         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1860         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1861         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1862         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1863         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1864         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1865         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1866         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1867         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1868         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1869         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1870         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1871         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1872         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1873         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1874         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1875         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
1876         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
1877         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
1878         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
1879         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
1880         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
1881         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
1882         IOCTL_INFO_STD(VIDIOC_G_MODULATOR, vidioc_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
1883         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
1884         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
1885         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
1886         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
1887         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
1888         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
1889         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
1890         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
1891         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
1892         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
1893         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
1894         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
1895         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
1896         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
1897         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
1898         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
1899         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)),
1900         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
1901         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
1902         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
1903         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, 0),
1904         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
1905         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
1906         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
1907         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1908         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1909         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
1910         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
1911         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
1912         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
1913         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
1914         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
1915         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
1916         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
1917         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
1918         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
1919         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
1920         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
1921         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
1922         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
1923         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
1924         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1925         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
1926         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
1927         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
1928         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, 0),
1929 };
1930 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
1931
1932 bool v4l2_is_known_ioctl(unsigned int cmd)
1933 {
1934         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
1935                 return false;
1936         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
1937 }
1938
1939 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
1940 {
1941         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
1942                 return vdev->lock;
1943         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
1944                 return NULL;
1945         if (vdev->queue && vdev->queue->lock &&
1946                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
1947                 return vdev->queue->lock;
1948         return vdev->lock;
1949 }
1950
1951 /* Common ioctl debug function. This function can be used by
1952    external ioctl messages as well as internal V4L ioctl */
1953 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
1954 {
1955         const char *dir, *type;
1956
1957         if (prefix)
1958                 printk(KERN_DEBUG "%s: ", prefix);
1959
1960         switch (_IOC_TYPE(cmd)) {
1961         case 'd':
1962                 type = "v4l2_int";
1963                 break;
1964         case 'V':
1965                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
1966                         type = "v4l2";
1967                         break;
1968                 }
1969                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
1970                 return;
1971         default:
1972                 type = "unknown";
1973                 break;
1974         }
1975
1976         switch (_IOC_DIR(cmd)) {
1977         case _IOC_NONE:              dir = "--"; break;
1978         case _IOC_READ:              dir = "r-"; break;
1979         case _IOC_WRITE:             dir = "-w"; break;
1980         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
1981         default:                     dir = "*ERR*"; break;
1982         }
1983         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
1984                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
1985 }
1986 EXPORT_SYMBOL(v4l_printk_ioctl);
1987
1988 static long __video_do_ioctl(struct file *file,
1989                 unsigned int cmd, void *arg)
1990 {
1991         struct video_device *vfd = video_devdata(file);
1992         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
1993         bool write_only = false;
1994         struct v4l2_ioctl_info default_info;
1995         const struct v4l2_ioctl_info *info;
1996         void *fh = file->private_data;
1997         struct v4l2_fh *vfh = NULL;
1998         int use_fh_prio = 0;
1999         int debug = vfd->debug;
2000         long ret = -ENOTTY;
2001
2002         if (ops == NULL) {
2003                 pr_warn("%s: has no ioctl_ops.\n",
2004                                 video_device_node_name(vfd));
2005                 return ret;
2006         }
2007
2008         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2009                 vfh = file->private_data;
2010                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2011         }
2012
2013         if (v4l2_is_known_ioctl(cmd)) {
2014                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2015
2016                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2017                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2018                         goto done;
2019
2020                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2021                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2022                         if (ret)
2023                                 goto done;
2024                 }
2025         } else {
2026                 default_info.ioctl = cmd;
2027                 default_info.flags = 0;
2028                 default_info.debug = v4l_print_default;
2029                 info = &default_info;
2030         }
2031
2032         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2033         if (write_only && debug > V4L2_DEBUG_IOCTL) {
2034                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2035                 pr_cont(": ");
2036                 info->debug(arg, write_only);
2037         }
2038         if (info->flags & INFO_FL_STD) {
2039                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2040                 const void *p = vfd->ioctl_ops;
2041                 const vidioc_op *vidioc = p + info->offset;
2042
2043                 ret = (*vidioc)(file, fh, arg);
2044         } else if (info->flags & INFO_FL_FUNC) {
2045                 ret = info->func(ops, file, fh, arg);
2046         } else if (!ops->vidioc_default) {
2047                 ret = -ENOTTY;
2048         } else {
2049                 ret = ops->vidioc_default(file, fh,
2050                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2051                         cmd, arg);
2052         }
2053
2054 done:
2055         if (debug) {
2056                 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2057                         if (ret < 0)
2058                                 printk(KERN_DEBUG "%s: error %ld\n",
2059                                         video_device_node_name(vfd), ret);
2060                         return ret;
2061                 }
2062                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2063                 if (ret < 0)
2064                         pr_cont(": error %ld\n", ret);
2065                 else if (debug == V4L2_DEBUG_IOCTL)
2066                         pr_cont("\n");
2067                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2068                         info->debug(arg, write_only);
2069                 else {
2070                         pr_cont(": ");
2071                         info->debug(arg, write_only);
2072                 }
2073         }
2074
2075         return ret;
2076 }
2077
2078 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2079                             void * __user *user_ptr, void ***kernel_ptr)
2080 {
2081         int ret = 0;
2082
2083         switch (cmd) {
2084         case VIDIOC_QUERYBUF:
2085         case VIDIOC_QBUF:
2086         case VIDIOC_DQBUF: {
2087                 struct v4l2_buffer *buf = parg;
2088
2089                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2090                         if (buf->length > VIDEO_MAX_PLANES) {
2091                                 ret = -EINVAL;
2092                                 break;
2093                         }
2094                         *user_ptr = (void __user *)buf->m.planes;
2095                         *kernel_ptr = (void *)&buf->m.planes;
2096                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2097                         ret = 1;
2098                 }
2099                 break;
2100         }
2101
2102         case VIDIOC_S_EXT_CTRLS:
2103         case VIDIOC_G_EXT_CTRLS:
2104         case VIDIOC_TRY_EXT_CTRLS: {
2105                 struct v4l2_ext_controls *ctrls = parg;
2106
2107                 if (ctrls->count != 0) {
2108                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2109                                 ret = -EINVAL;
2110                                 break;
2111                         }
2112                         *user_ptr = (void __user *)ctrls->controls;
2113                         *kernel_ptr = (void *)&ctrls->controls;
2114                         *array_size = sizeof(struct v4l2_ext_control)
2115                                     * ctrls->count;
2116                         ret = 1;
2117                 }
2118                 break;
2119         }
2120         }
2121
2122         return ret;
2123 }
2124
2125 long
2126 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2127                v4l2_kioctl func)
2128 {
2129         char    sbuf[128];
2130         void    *mbuf = NULL;
2131         void    *parg = (void *)arg;
2132         long    err  = -EINVAL;
2133         bool    has_array_args;
2134         size_t  array_size = 0;
2135         void __user *user_ptr = NULL;
2136         void    **kernel_ptr = NULL;
2137
2138         /*  Copy arguments into temp kernel buffer  */
2139         if (_IOC_DIR(cmd) != _IOC_NONE) {
2140                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2141                         parg = sbuf;
2142                 } else {
2143                         /* too big to allocate from stack */
2144                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2145                         if (NULL == mbuf)
2146                                 return -ENOMEM;
2147                         parg = mbuf;
2148                 }
2149
2150                 err = -EFAULT;
2151                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2152                         unsigned int n = _IOC_SIZE(cmd);
2153
2154                         /*
2155                          * In some cases, only a few fields are used as input,
2156                          * i.e. when the app sets "index" and then the driver
2157                          * fills in the rest of the structure for the thing
2158                          * with that index.  We only need to copy up the first
2159                          * non-input field.
2160                          */
2161                         if (v4l2_is_known_ioctl(cmd)) {
2162                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2163                                 if (flags & INFO_FL_CLEAR_MASK)
2164                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2165                         }
2166
2167                         if (copy_from_user(parg, (void __user *)arg, n))
2168                                 goto out;
2169
2170                         /* zero out anything we don't copy from userspace */
2171                         if (n < _IOC_SIZE(cmd))
2172                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2173                 } else {
2174                         /* read-only ioctl */
2175                         memset(parg, 0, _IOC_SIZE(cmd));
2176                 }
2177         }
2178
2179         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2180         if (err < 0)
2181                 goto out;
2182         has_array_args = err;
2183
2184         if (has_array_args) {
2185                 /*
2186                  * When adding new types of array args, make sure that the
2187                  * parent argument to ioctl (which contains the pointer to the
2188                  * array) fits into sbuf (so that mbuf will still remain
2189                  * unused up to here).
2190                  */
2191                 mbuf = kmalloc(array_size, GFP_KERNEL);
2192                 err = -ENOMEM;
2193                 if (NULL == mbuf)
2194                         goto out_array_args;
2195                 err = -EFAULT;
2196                 if (copy_from_user(mbuf, user_ptr, array_size))
2197                         goto out_array_args;
2198                 *kernel_ptr = mbuf;
2199         }
2200
2201         /* Handles IOCTL */
2202         err = func(file, cmd, parg);
2203         if (err == -ENOIOCTLCMD)
2204                 err = -ENOTTY;
2205
2206         if (has_array_args) {
2207                 *kernel_ptr = user_ptr;
2208                 if (copy_to_user(user_ptr, mbuf, array_size))
2209                         err = -EFAULT;
2210                 goto out_array_args;
2211         }
2212         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2213            results that must be returned. */
2214         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2215                 goto out;
2216
2217 out_array_args:
2218         /*  Copy results into user buffer  */
2219         switch (_IOC_DIR(cmd)) {
2220         case _IOC_READ:
2221         case (_IOC_WRITE | _IOC_READ):
2222                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2223                         err = -EFAULT;
2224                 break;
2225         }
2226
2227 out:
2228         kfree(mbuf);
2229         return err;
2230 }
2231 EXPORT_SYMBOL(video_usercopy);
2232
2233 long video_ioctl2(struct file *file,
2234                unsigned int cmd, unsigned long arg)
2235 {
2236         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2237 }
2238 EXPORT_SYMBOL(video_ioctl2);