Pileus Git - ~andy/linux/blob - drivers/media/v4l2-core/v4l2-ioctl.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/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) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 161
 162 /* ------------------------------------------------------------------ */
 163 /* debug help functions                                               */
 164
 165 static void v4l_print_querycap(const void *arg, bool write_only)
 166 {
 167         const struct v4l2_capability *p = arg;
 168
 169         pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, "
 170                 "capabilities=0x%08x, device_caps=0x%08x\n",
 171                 p->driver, p->card, p->bus_info,
 172                 p->version, p->capabilities, p->device_caps);
 173 }
 174
 175 static void v4l_print_enuminput(const void *arg, bool write_only)
 176 {
 177         const struct v4l2_input *p = arg;
 178
 179         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, "
 180                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 181                 p->index, p->name, p->type, p->audioset, p->tuner,
 182                 (unsigned long long)p->std, p->status, p->capabilities);
 183 }
 184
 185 static void v4l_print_enumoutput(const void *arg, bool write_only)
 186 {
 187         const struct v4l2_output *p = arg;
 188
 189         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, "
 190                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 191                 p->index, p->name, p->type, p->audioset, p->modulator,
 192                 (unsigned long long)p->std, p->capabilities);
 193 }
 194
 195 static void v4l_print_audio(const void *arg, bool write_only)
 196 {
 197         const struct v4l2_audio *p = arg;
 198
 199         if (write_only)
 200                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 201         else
 202                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
 203                         p->index, p->name, p->capability, p->mode);
 204 }
 205
 206 static void v4l_print_audioout(const void *arg, bool write_only)
 207 {
 208         const struct v4l2_audioout *p = arg;
 209
 210         if (write_only)
 211                 pr_cont("index=%u\n", p->index);
 212         else
 213                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
 214                         p->index, p->name, p->capability, p->mode);
 215 }
 216
 217 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 218 {
 219         const struct v4l2_fmtdesc *p = arg;
 220
 221         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n",
 222                 p->index, prt_names(p->type, v4l2_type_names),
 223                 p->flags, (p->pixelformat & 0xff),
 224                 (p->pixelformat >>  8) & 0xff,
 225                 (p->pixelformat >> 16) & 0xff,
 226                 (p->pixelformat >> 24) & 0xff,
 227                 p->description);
 228 }
 229
 230 static void v4l_print_format(const void *arg, bool write_only)
 231 {
 232         const struct v4l2_format *p = arg;
 233         const struct v4l2_pix_format *pix;
 234         const struct v4l2_pix_format_mplane *mp;
 235         const struct v4l2_vbi_format *vbi;
 236         const struct v4l2_sliced_vbi_format *sliced;
 237         const struct v4l2_window *win;
 238         const struct v4l2_clip *clip;
 239         unsigned i;
 240
 241         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 242         switch (p->type) {
 243         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 244         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 245                 pix = &p->fmt.pix;
 246                 pr_cont(", width=%u, height=%u, "
 247                         "pixelformat=%c%c%c%c, field=%s, "
 248                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 249                         pix->width, pix->height,
 250                         (pix->pixelformat & 0xff),
 251                         (pix->pixelformat >>  8) & 0xff,
 252                         (pix->pixelformat >> 16) & 0xff,
 253                         (pix->pixelformat >> 24) & 0xff,
 254                         prt_names(pix->field, v4l2_field_names),
 255                         pix->bytesperline, pix->sizeimage,
 256                         pix->colorspace);
 257                 break;
 258         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 259         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 260                 mp = &p->fmt.pix_mp;
 261                 pr_cont(", width=%u, height=%u, "
 262                         "format=%c%c%c%c, field=%s, "
 263                         "colorspace=%d, num_planes=%u\n",
 264                         mp->width, mp->height,
 265                         (mp->pixelformat & 0xff),
 266                         (mp->pixelformat >>  8) & 0xff,
 267                         (mp->pixelformat >> 16) & 0xff,
 268                         (mp->pixelformat >> 24) & 0xff,
 269                         prt_names(mp->field, v4l2_field_names),
 270                         mp->colorspace, mp->num_planes);
 271                 for (i = 0; i < mp->num_planes; i++)
 272                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 273                                         mp->plane_fmt[i].bytesperline,
 274                                         mp->plane_fmt[i].sizeimage);
 275                 break;
 276         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 277         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 278                 win = &p->fmt.win;
 279                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 280                         "chromakey=0x%08x, bitmap=%p, "
 281                         "global_alpha=0x%02x\n",
 282                         win->w.width, win->w.height,
 283                         win->w.left, win->w.top,
 284                         prt_names(win->field, v4l2_field_names),
 285                         win->chromakey, win->bitmap, win->global_alpha);
 286                 clip = win->clips;
 287                 for (i = 0; i < win->clipcount; i++) {
 288                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 289                                         i, clip->c.width, clip->c.height,
 290                                         clip->c.left, clip->c.top);
 291                         clip = clip->next;
 292                 }
 293                 break;
 294         case V4L2_BUF_TYPE_VBI_CAPTURE:
 295         case V4L2_BUF_TYPE_VBI_OUTPUT:
 296                 vbi = &p->fmt.vbi;
 297                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 298                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 299                         vbi->sampling_rate, vbi->offset,
 300                         vbi->samples_per_line,
 301                         (vbi->sample_format & 0xff),
 302                         (vbi->sample_format >>  8) & 0xff,
 303                         (vbi->sample_format >> 16) & 0xff,
 304                         (vbi->sample_format >> 24) & 0xff,
 305                         vbi->start[0], vbi->start[1],
 306                         vbi->count[0], vbi->count[1]);
 307                 break;
 308         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 309         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 310                 sliced = &p->fmt.sliced;
 311                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 312                                 sliced->service_set, sliced->io_size);
 313                 for (i = 0; i < 24; i++)
 314                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 315                                 sliced->service_lines[0][i],
 316                                 sliced->service_lines[1][i]);
 317                 break;
 318         }
 319 }
 320
 321 static void v4l_print_framebuffer(const void *arg, bool write_only)
 322 {
 323         const struct v4l2_framebuffer *p = arg;
 324
 325         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 326                 "height=%u, pixelformat=%c%c%c%c, "
 327                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 328                         p->capability, p->flags, p->base,
 329                         p->fmt.width, p->fmt.height,
 330                         (p->fmt.pixelformat & 0xff),
 331                         (p->fmt.pixelformat >>  8) & 0xff,
 332                         (p->fmt.pixelformat >> 16) & 0xff,
 333                         (p->fmt.pixelformat >> 24) & 0xff,
 334                         p->fmt.bytesperline, p->fmt.sizeimage,
 335                         p->fmt.colorspace);
 336 }
 337
 338 static void v4l_print_buftype(const void *arg, bool write_only)
 339 {
 340         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 341 }
 342
 343 static void v4l_print_modulator(const void *arg, bool write_only)
 344 {
 345         const struct v4l2_modulator *p = arg;
 346
 347         if (write_only)
 348                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 349         else
 350                 pr_cont("index=%u, name=%s, capability=0x%x, "
 351                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 352                         p->index, p->name, p->capability,
 353                         p->rangelow, p->rangehigh, p->txsubchans);
 354 }
 355
 356 static void v4l_print_tuner(const void *arg, bool write_only)
 357 {
 358         const struct v4l2_tuner *p = arg;
 359
 360         if (write_only)
 361                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 362         else
 363                 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, "
 364                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 365                         "rxsubchans=0x%x, audmode=%u\n",
 366                         p->index, p->name, p->type,
 367                         p->capability, p->rangelow,
 368                         p->rangehigh, p->signal, p->afc,
 369                         p->rxsubchans, p->audmode);
 370 }
 371
 372 static void v4l_print_frequency(const void *arg, bool write_only)
 373 {
 374         const struct v4l2_frequency *p = arg;
 375
 376         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 377                                 p->tuner, p->type, p->frequency);
 378 }
 379
 380 static void v4l_print_standard(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_standard *p = arg;
 383
 384         pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, "
 385                 "framelines=%u\n", p->index,
 386                 (unsigned long long)p->id, p->name,
 387                 p->frameperiod.numerator,
 388                 p->frameperiod.denominator,
 389                 p->framelines);
 390 }
 391
 392 static void v4l_print_std(const void *arg, bool write_only)
 393 {
 394         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 395 }
 396
 397 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 398 {
 399         const struct v4l2_hw_freq_seek *p = arg;
 400
 401         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 402                 "rangelow=%u, rangehigh=%u\n",
 403                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 404                 p->rangelow, p->rangehigh);
 405 }
 406
 407 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 408 {
 409         const struct v4l2_requestbuffers *p = arg;
 410
 411         pr_cont("count=%d, type=%s, memory=%s\n",
 412                 p->count,
 413                 prt_names(p->type, v4l2_type_names),
 414                 prt_names(p->memory, v4l2_memory_names));
 415 }
 416
 417 static void v4l_print_buffer(const void *arg, bool write_only)
 418 {
 419         const struct v4l2_buffer *p = arg;
 420         const struct v4l2_timecode *tc = &p->timecode;
 421         const struct v4l2_plane *plane;
 422         int i;
 423
 424         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 425                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 426                         p->timestamp.tv_sec / 3600,
 427                         (int)(p->timestamp.tv_sec / 60) % 60,
 428                         (int)(p->timestamp.tv_sec % 60),
 429                         (long)p->timestamp.tv_usec,
 430                         p->index,
 431                         prt_names(p->type, v4l2_type_names),
 432                         p->flags, prt_names(p->field, v4l2_field_names),
 433                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 434
 435         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 436                 pr_cont("\n");
 437                 for (i = 0; i < p->length; ++i) {
 438                         plane = &p->m.planes[i];
 439                         printk(KERN_DEBUG
 440                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 441                                 "offset/userptr=0x%lx, length=%d\n",
 442                                 i, plane->bytesused, plane->data_offset,
 443                                 plane->m.userptr, plane->length);
 444                 }
 445         } else {
 446                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 447                         p->bytesused, p->m.userptr, p->length);
 448         }
 449
 450         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 451                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 452                         tc->hours, tc->minutes, tc->seconds,
 453                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 454 }
 455
 456 static void v4l_print_create_buffers(const void *arg, bool write_only)
 457 {
 458         const struct v4l2_create_buffers *p = arg;
 459
 460         pr_cont("index=%d, count=%d, memory=%s, ",
 461                         p->index, p->count,
 462                         prt_names(p->memory, v4l2_memory_names));
 463         v4l_print_format(&p->format, write_only);
 464 }
 465
 466 static void v4l_print_streamparm(const void *arg, bool write_only)
 467 {
 468         const struct v4l2_streamparm *p = arg;
 469
 470         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 471
 472         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 473             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 474                 const struct v4l2_captureparm *c = &p->parm.capture;
 475
 476                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 477                         "extendedmode=%d, readbuffers=%d\n",
 478                         c->capability, c->capturemode,
 479                         c->timeperframe.numerator, c->timeperframe.denominator,
 480                         c->extendedmode, c->readbuffers);
 481         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 482                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 483                 const struct v4l2_outputparm *c = &p->parm.output;
 484
 485                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 486                         "extendedmode=%d, writebuffers=%d\n",
 487                         c->capability, c->outputmode,
 488                         c->timeperframe.numerator, c->timeperframe.denominator,
 489                         c->extendedmode, c->writebuffers);
 490         }
 491 }
 492
 493 static void v4l_print_queryctrl(const void *arg, bool write_only)
 494 {
 495         const struct v4l2_queryctrl *p = arg;
 496
 497         pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, "
 498                 "step=%d, default=%d, flags=0x%08x\n",
 499                         p->id, p->type, p->name,
 500                         p->minimum, p->maximum,
 501                         p->step, p->default_value, p->flags);
 502 }
 503
 504 static void v4l_print_querymenu(const void *arg, bool write_only)
 505 {
 506         const struct v4l2_querymenu *p = arg;
 507
 508         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 509 }
 510
 511 static void v4l_print_control(const void *arg, bool write_only)
 512 {
 513         const struct v4l2_control *p = arg;
 514
 515         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 516 }
 517
 518 static void v4l_print_ext_controls(const void *arg, bool write_only)
 519 {
 520         const struct v4l2_ext_controls *p = arg;
 521         int i;
 522
 523         pr_cont("class=0x%x, count=%d, error_idx=%d",
 524                         p->ctrl_class, p->count, p->error_idx);
 525         for (i = 0; i < p->count; i++) {
 526                 if (p->controls[i].size)
 527                         pr_cont(", id/val=0x%x/0x%x",
 528                                 p->controls[i].id, p->controls[i].value);
 529                 else
 530                         pr_cont(", id/size=0x%x/%u",
 531                                 p->controls[i].id, p->controls[i].size);
 532         }
 533         pr_cont("\n");
 534 }
 535
 536 static void v4l_print_cropcap(const void *arg, bool write_only)
 537 {
 538         const struct v4l2_cropcap *p = arg;
 539
 540         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 541                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 542                 "pixelaspect %d/%d\n",
 543                 prt_names(p->type, v4l2_type_names),
 544                 p->bounds.width, p->bounds.height,
 545                 p->bounds.left, p->bounds.top,
 546                 p->defrect.width, p->defrect.height,
 547                 p->defrect.left, p->defrect.top,
 548                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 549 }
 550
 551 static void v4l_print_crop(const void *arg, bool write_only)
 552 {
 553         const struct v4l2_crop *p = arg;
 554
 555         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 556                 prt_names(p->type, v4l2_type_names),
 557                 p->c.width, p->c.height,
 558                 p->c.left, p->c.top);
 559 }
 560
 561 static void v4l_print_selection(const void *arg, bool write_only)
 562 {
 563         const struct v4l2_selection *p = arg;
 564
 565         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 566                 prt_names(p->type, v4l2_type_names),
 567                 p->target, p->flags,
 568                 p->r.width, p->r.height, p->r.left, p->r.top);
 569 }
 570
 571 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 572 {
 573         const struct v4l2_jpegcompression *p = arg;
 574
 575         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 576                 "COM_len=%d, jpeg_markers=0x%x\n",
 577                 p->quality, p->APPn, p->APP_len,
 578                 p->COM_len, p->jpeg_markers);
 579 }
 580
 581 static void v4l_print_enc_idx(const void *arg, bool write_only)
 582 {
 583         const struct v4l2_enc_idx *p = arg;
 584
 585         pr_cont("entries=%d, entries_cap=%d\n",
 586                         p->entries, p->entries_cap);
 587 }
 588
 589 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 590 {
 591         const struct v4l2_encoder_cmd *p = arg;
 592
 593         pr_cont("cmd=%d, flags=0x%x\n",
 594                         p->cmd, p->flags);
 595 }
 596
 597 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 598 {
 599         const struct v4l2_decoder_cmd *p = arg;
 600
 601         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 602
 603         if (p->cmd == V4L2_DEC_CMD_START)
 604                 pr_info("speed=%d, format=%u\n",
 605                                 p->start.speed, p->start.format);
 606         else if (p->cmd == V4L2_DEC_CMD_STOP)
 607                 pr_info("pts=%llu\n", p->stop.pts);
 608 }
 609
 610 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 611 {
 612         const struct v4l2_dbg_chip_ident *p = arg;
 613
 614         pr_cont("type=%u, ", p->match.type);
 615         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 616                 pr_cont("name=%s, ", p->match.name);
 617         else
 618                 pr_cont("addr=%u, ", p->match.addr);
 619         pr_cont("chip_ident=%u, revision=0x%x\n",
 620                         p->ident, p->revision);
 621 }
 622
 623 static void v4l_print_dbg_register(const void *arg, bool write_only)
 624 {
 625         const struct v4l2_dbg_register *p = arg;
 626
 627         pr_cont("type=%u, ", p->match.type);
 628         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 629                 pr_cont("name=%s, ", p->match.name);
 630         else
 631                 pr_cont("addr=%u, ", p->match.addr);
 632         pr_cont("reg=0x%llx, val=0x%llx\n",
 633                         p->reg, p->val);
 634 }
 635
 636 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
 637 {
 638         const struct v4l2_dv_enum_preset *p = arg;
 639
 640         pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n",
 641                         p->index, p->preset, p->name, p->width, p->height);
 642 }
 643
 644 static void v4l_print_dv_preset(const void *arg, bool write_only)
 645 {
 646         const struct v4l2_dv_preset *p = arg;
 647
 648         pr_cont("preset=%u\n", p->preset);
 649 }
 650
 651 static void v4l_print_dv_timings(const void *arg, bool write_only)
 652 {
 653         const struct v4l2_dv_timings *p = arg;
 654
 655         switch (p->type) {
 656         case V4L2_DV_BT_656_1120:
 657                 pr_cont("type=bt-656/1120, interlaced=%u, "
 658                         "pixelclock=%llu, "
 659                         "width=%u, height=%u, polarities=0x%x, "
 660                         "hfrontporch=%u, hsync=%u, "
 661                         "hbackporch=%u, vfrontporch=%u, "
 662                         "vsync=%u, vbackporch=%u, "
 663                         "il_vfrontporch=%u, il_vsync=%u, "
 664                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 665                                 p->bt.interlaced, p->bt.pixelclock,
 666                                 p->bt.width, p->bt.height,
 667                                 p->bt.polarities, p->bt.hfrontporch,
 668                                 p->bt.hsync, p->bt.hbackporch,
 669                                 p->bt.vfrontporch, p->bt.vsync,
 670                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 671                                 p->bt.il_vsync, p->bt.il_vbackporch,
 672                                 p->bt.standards, p->bt.flags);
 673                 break;
 674         default:
 675                 pr_cont("type=%d\n", p->type);
 676                 break;
 677         }
 678 }
 679
 680 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 681 {
 682         const struct v4l2_enum_dv_timings *p = arg;
 683
 684         pr_cont("index=%u, ", p->index);
 685         v4l_print_dv_timings(&p->timings, write_only);
 686 }
 687
 688 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 689 {
 690         const struct v4l2_dv_timings_cap *p = arg;
 691
 692         switch (p->type) {
 693         case V4L2_DV_BT_656_1120:
 694                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 695                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 696                         p->bt.min_width, p->bt.max_width,
 697                         p->bt.min_height, p->bt.max_height,
 698                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 699                         p->bt.standards, p->bt.capabilities);
 700                 break;
 701         default:
 702                 pr_cont("type=%u\n", p->type);
 703                 break;
 704         }
 705 }
 706
 707 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 708 {
 709         const struct v4l2_frmsizeenum *p = arg;
 710
 711         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 712                         p->index,
 713                         (p->pixel_format & 0xff),
 714                         (p->pixel_format >>  8) & 0xff,
 715                         (p->pixel_format >> 16) & 0xff,
 716                         (p->pixel_format >> 24) & 0xff,
 717                         p->type);
 718         switch (p->type) {
 719         case V4L2_FRMSIZE_TYPE_DISCRETE:
 720                 pr_cont(" wxh=%ux%u\n",
 721                         p->discrete.width, p->discrete.height);
 722                 break;
 723         case V4L2_FRMSIZE_TYPE_STEPWISE:
 724                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 725                                 p->stepwise.min_width,  p->stepwise.min_height,
 726                                 p->stepwise.step_width, p->stepwise.step_height,
 727                                 p->stepwise.max_width,  p->stepwise.max_height);
 728                 break;
 729         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 730                 /* fall through */
 731         default:
 732                 pr_cont("\n");
 733                 break;
 734         }
 735 }
 736
 737 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 738 {
 739         const struct v4l2_frmivalenum *p = arg;
 740
 741         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 742                         p->index,
 743                         (p->pixel_format & 0xff),
 744                         (p->pixel_format >>  8) & 0xff,
 745                         (p->pixel_format >> 16) & 0xff,
 746                         (p->pixel_format >> 24) & 0xff,
 747                         p->width, p->height, p->type);
 748         switch (p->type) {
 749         case V4L2_FRMIVAL_TYPE_DISCRETE:
 750                 pr_cont(" fps=%d/%d\n",
 751                                 p->discrete.numerator,
 752                                 p->discrete.denominator);
 753                 break;
 754         case V4L2_FRMIVAL_TYPE_STEPWISE:
 755                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 756                                 p->stepwise.min.numerator,
 757                                 p->stepwise.min.denominator,
 758                                 p->stepwise.max.numerator,
 759                                 p->stepwise.max.denominator,
 760                                 p->stepwise.step.numerator,
 761                                 p->stepwise.step.denominator);
 762                 break;
 763         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 764                 /* fall through */
 765         default:
 766                 pr_cont("\n");
 767                 break;
 768         }
 769 }
 770
 771 static void v4l_print_event(const void *arg, bool write_only)
 772 {
 773         const struct v4l2_event *p = arg;
 774         const struct v4l2_event_ctrl *c;
 775
 776         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 777                 "timestamp=%lu.%9.9lu\n",
 778                         p->type, p->pending, p->sequence, p->id,
 779                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 780         switch (p->type) {
 781         case V4L2_EVENT_VSYNC:
 782                 printk(KERN_DEBUG "field=%s\n",
 783                         prt_names(p->u.vsync.field, v4l2_field_names));
 784                 break;
 785         case V4L2_EVENT_CTRL:
 786                 c = &p->u.ctrl;
 787                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 788                         c->changes, c->type);
 789                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 790                         pr_cont("value64=%lld, ", c->value64);
 791                 else
 792                         pr_cont("value=%d, ", c->value);
 793                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 794                                 " default_value=%d\n",
 795                         c->flags, c->minimum, c->maximum,
 796                         c->step, c->default_value);
 797                 break;
 798         case V4L2_EVENT_FRAME_SYNC:
 799                 pr_cont("frame_sequence=%u\n",
 800                         p->u.frame_sync.frame_sequence);
 801                 break;
 802         }
 803 }
 804
 805 static void v4l_print_event_subscription(const void *arg, bool write_only)
 806 {
 807         const struct v4l2_event_subscription *p = arg;
 808
 809         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 810                         p->type, p->id, p->flags);
 811 }
 812
 813 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 814 {
 815         const struct v4l2_sliced_vbi_cap *p = arg;
 816         int i;
 817
 818         pr_cont("type=%s, service_set=0x%08x\n",
 819                         prt_names(p->type, v4l2_type_names), p->service_set);
 820         for (i = 0; i < 24; i++)
 821                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 822                                 p->service_lines[0][i],
 823                                 p->service_lines[1][i]);
 824 }
 825
 826 static void v4l_print_freq_band(const void *arg, bool write_only)
 827 {
 828         const struct v4l2_frequency_band *p = arg;
 829
 830         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 831                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 832                         p->tuner, p->type, p->index,
 833                         p->capability, p->rangelow,
 834                         p->rangehigh, p->modulation);
 835 }
 836
 837 static void v4l_print_u32(const void *arg, bool write_only)
 838 {
 839         pr_cont("value=%u\n", *(const u32 *)arg);
 840 }
 841
 842 static void v4l_print_newline(const void *arg, bool write_only)
 843 {
 844         pr_cont("\n");
 845 }
 846
 847 static void v4l_print_default(const void *arg, bool write_only)
 848 {
 849         pr_cont("driver-specific ioctl\n");
 850 }
 851
 852 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 853 {
 854         __u32 i;
 855
 856         /* zero the reserved fields */
 857         c->reserved[0] = c->reserved[1] = 0;
 858         for (i = 0; i < c->count; i++)
 859                 c->controls[i].reserved2[0] = 0;
 860
 861         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 862            when using extended controls.
 863            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 864            is it allowed for backwards compatibility.
 865          */
 866         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 867                 return 0;
 868         /* Check that all controls are from the same control class. */
 869         for (i = 0; i < c->count; i++) {
 870                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 871                         c->error_idx = i;
 872                         return 0;
 873                 }
 874         }
 875         return 1;
 876 }
 877
 878 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 879 {
 880         struct video_device *vfd = video_devdata(file);
 881         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 882         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 883         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 884         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 885         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 886
 887         if (ops == NULL)
 888                 return -EINVAL;
 889
 890         switch (type) {
 891         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 892                 if (is_vid && is_rx &&
 893                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 894                         return 0;
 895                 break;
 896         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 897                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 898                         return 0;
 899                 break;
 900         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 901                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 902                         return 0;
 903                 break;
 904         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 905                 if (is_vid && is_tx &&
 906                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 907                         return 0;
 908                 break;
 909         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 910                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 911                         return 0;
 912                 break;
 913         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 914                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 915                         return 0;
 916                 break;
 917         case V4L2_BUF_TYPE_VBI_CAPTURE:
 918                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 919                         return 0;
 920                 break;
 921         case V4L2_BUF_TYPE_VBI_OUTPUT:
 922                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 923                         return 0;
 924                 break;
 925         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 926                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 930                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 931                         return 0;
 932                 break;
 933         default:
 934                 break;
 935         }
 936         return -EINVAL;
 937 }
 938
 939 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 940                                 struct file *file, void *fh, void *arg)
 941 {
 942         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 943
 944         cap->version = LINUX_VERSION_CODE;
 945         return ops->vidioc_querycap(file, fh, cap);
 946 }
 947
 948 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 949                                 struct file *file, void *fh, void *arg)
 950 {
 951         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 952 }
 953
 954 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 955                                 struct file *file, void *fh, void *arg)
 956 {
 957         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 958 }
 959
 960 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 961                                 struct file *file, void *fh, void *arg)
 962 {
 963         struct video_device *vfd;
 964         u32 *p = arg;
 965
 966         if (ops->vidioc_g_priority)
 967                 return ops->vidioc_g_priority(file, fh, arg);
 968         vfd = video_devdata(file);
 969         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 970         return 0;
 971 }
 972
 973 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 974                                 struct file *file, void *fh, void *arg)
 975 {
 976         struct video_device *vfd;
 977         struct v4l2_fh *vfh;
 978         u32 *p = arg;
 979
 980         if (ops->vidioc_s_priority)
 981                 return ops->vidioc_s_priority(file, fh, *p);
 982         vfd = video_devdata(file);
 983         vfh = file->private_data;
 984         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
 985 }
 986
 987 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
 988                                 struct file *file, void *fh, void *arg)
 989 {
 990         struct v4l2_input *p = arg;
 991
 992         /*
 993          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
 994          * CAP_STD here based on ioctl handler provided by the
 995          * driver. If the driver doesn't support these
 996          * for a specific input, it must override these flags.
 997          */
 998         if (ops->vidioc_s_std)
 999                 p->capabilities |= V4L2_IN_CAP_STD;
1000         if (ops->vidioc_s_dv_preset)
1001                 p->capabilities |= V4L2_IN_CAP_PRESETS;
1002         if (ops->vidioc_s_dv_timings)
1003                 p->capabilities |= V4L2_IN_CAP_DV_TIMINGS;
1004
1005         return ops->vidioc_enum_input(file, fh, p);
1006 }
1007
1008 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1009                                 struct file *file, void *fh, void *arg)
1010 {
1011         struct v4l2_output *p = arg;
1012
1013         /*
1014          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
1015          * CAP_STD here based on ioctl handler provided by the
1016          * driver. If the driver doesn't support these
1017          * for a specific output, it must override these flags.
1018          */
1019         if (ops->vidioc_s_std)
1020                 p->capabilities |= V4L2_OUT_CAP_STD;
1021         if (ops->vidioc_s_dv_preset)
1022                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1023         if (ops->vidioc_s_dv_timings)
1024                 p->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
1025
1026         return ops->vidioc_enum_output(file, fh, p);
1027 }
1028
1029 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1030                                 struct file *file, void *fh, void *arg)
1031 {
1032         struct v4l2_fmtdesc *p = arg;
1033         struct video_device *vfd = video_devdata(file);
1034         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1035         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1036
1037         switch (p->type) {
1038         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1039                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1040                         break;
1041                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1042         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1043                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1044                         break;
1045                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1046         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1047                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1048                         break;
1049                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1050         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1051                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1052                         break;
1053                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1054         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1055                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1056                         break;
1057                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1058         }
1059         return -EINVAL;
1060 }
1061
1062 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1063                                 struct file *file, void *fh, void *arg)
1064 {
1065         struct v4l2_format *p = arg;
1066         struct video_device *vfd = video_devdata(file);
1067         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1068         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1069         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1070
1071         switch (p->type) {
1072         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1073                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1074                         break;
1075                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1076         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1077                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1078                         break;
1079                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1080         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1081                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1082                         break;
1083                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1084         case V4L2_BUF_TYPE_VBI_CAPTURE:
1085                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1086                         break;
1087                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1088         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1089                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1090                         break;
1091                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1092         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1093                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1094                         break;
1095                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1096         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1097                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1098                         break;
1099                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1100         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1101                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1102                         break;
1103                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1104         case V4L2_BUF_TYPE_VBI_OUTPUT:
1105                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1106                         break;
1107                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1108         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1109                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1110                         break;
1111                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1112         }
1113         return -EINVAL;
1114 }
1115
1116 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1117                                 struct file *file, void *fh, void *arg)
1118 {
1119         struct v4l2_format *p = arg;
1120         struct video_device *vfd = video_devdata(file);
1121         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1122         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1123         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1124
1125         switch (p->type) {
1126         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1127                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1128                         break;
1129                 CLEAR_AFTER_FIELD(p, fmt.pix);
1130                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1131         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1132                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1133                         break;
1134                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1135                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1136         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1137                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1138                         break;
1139                 CLEAR_AFTER_FIELD(p, fmt.win);
1140                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1141         case V4L2_BUF_TYPE_VBI_CAPTURE:
1142                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1143                         break;
1144                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1145                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1146         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1147                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1148                         break;
1149                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1150                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1151         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1152                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1153                         break;
1154                 CLEAR_AFTER_FIELD(p, fmt.pix);
1155                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1156         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1157                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1158                         break;
1159                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1160                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1161         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1162                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1163                         break;
1164                 CLEAR_AFTER_FIELD(p, fmt.win);
1165                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1166         case V4L2_BUF_TYPE_VBI_OUTPUT:
1167                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1168                         break;
1169                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1170                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1171         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1172                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1173                         break;
1174                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1175                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1176         }
1177         return -EINVAL;
1178 }
1179
1180 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1181                                 struct file *file, void *fh, void *arg)
1182 {
1183         struct v4l2_format *p = arg;
1184         struct video_device *vfd = video_devdata(file);
1185         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1186         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1187         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1188
1189         switch (p->type) {
1190         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1191                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1192                         break;
1193                 CLEAR_AFTER_FIELD(p, fmt.pix);
1194                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1195         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1196                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1197                         break;
1198                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1199                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1200         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1201                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1202                         break;
1203                 CLEAR_AFTER_FIELD(p, fmt.win);
1204                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1205         case V4L2_BUF_TYPE_VBI_CAPTURE:
1206                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1207                         break;
1208                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1209                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1210         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1211                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1212                         break;
1213                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1214                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1215         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1216                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1217                         break;
1218                 CLEAR_AFTER_FIELD(p, fmt.pix);
1219                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1220         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1221                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1222                         break;
1223                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1224                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1225         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1226                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1227                         break;
1228                 CLEAR_AFTER_FIELD(p, fmt.win);
1229                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1230         case V4L2_BUF_TYPE_VBI_OUTPUT:
1231                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1232                         break;
1233                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1234                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1235         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1236                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1237                         break;
1238                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1239                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1240         }
1241         return -EINVAL;
1242 }
1243
1244 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1245                                 struct file *file, void *fh, void *arg)
1246 {
1247         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1248 }
1249
1250 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1251                                 struct file *file, void *fh, void *arg)
1252 {
1253         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1254 }
1255
1256 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1257                                 struct file *file, void *fh, void *arg)
1258 {
1259         struct video_device *vfd = video_devdata(file);
1260         struct v4l2_tuner *p = arg;
1261         int err;
1262
1263         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1264                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1265         err = ops->vidioc_g_tuner(file, fh, p);
1266         if (!err)
1267                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1268         return err;
1269 }
1270
1271 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1272                                 struct file *file, void *fh, void *arg)
1273 {
1274         struct video_device *vfd = video_devdata(file);
1275         struct v4l2_tuner *p = arg;
1276
1277         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1278                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1279         return ops->vidioc_s_tuner(file, fh, p);
1280 }
1281
1282 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1283                                 struct file *file, void *fh, void *arg)
1284 {
1285         struct v4l2_modulator *p = arg;
1286         int err;
1287
1288         err = ops->vidioc_g_modulator(file, fh, p);
1289         if (!err)
1290                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1291         return err;
1292 }
1293
1294 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1295                                 struct file *file, void *fh, void *arg)
1296 {
1297         struct video_device *vfd = video_devdata(file);
1298         struct v4l2_frequency *p = arg;
1299
1300         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1301                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1302         return ops->vidioc_g_frequency(file, fh, p);
1303 }
1304
1305 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1306                                 struct file *file, void *fh, void *arg)
1307 {
1308         struct video_device *vfd = video_devdata(file);
1309         struct v4l2_frequency *p = arg;
1310         enum v4l2_tuner_type type;
1311
1312         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1313                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1314         if (p->type != type)
1315                 return -EINVAL;
1316         return ops->vidioc_s_frequency(file, fh, p);
1317 }
1318
1319 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1320                                 struct file *file, void *fh, void *arg)
1321 {
1322         struct video_device *vfd = video_devdata(file);
1323         struct v4l2_standard *p = arg;
1324         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1325         unsigned int index = p->index, i, j = 0;
1326         const char *descr = "";
1327
1328         /* Return -ENODATA if the tvnorms for the current input
1329            or output is 0, meaning that it doesn't support this API. */
1330         if (id == 0)
1331                 return -ENODATA;
1332
1333         /* Return norm array in a canonical way */
1334         for (i = 0; i <= index && id; i++) {
1335                 /* last std value in the standards array is 0, so this
1336                    while always ends there since (id & 0) == 0. */
1337                 while ((id & standards[j].std) != standards[j].std)
1338                         j++;
1339                 curr_id = standards[j].std;
1340                 descr = standards[j].descr;
1341                 j++;
1342                 if (curr_id == 0)
1343                         break;
1344                 if (curr_id != V4L2_STD_PAL &&
1345                                 curr_id != V4L2_STD_SECAM &&
1346                                 curr_id != V4L2_STD_NTSC)
1347                         id &= ~curr_id;
1348         }
1349         if (i <= index)
1350                 return -EINVAL;
1351
1352         v4l2_video_std_construct(p, curr_id, descr);
1353         return 0;
1354 }
1355
1356 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1357                                 struct file *file, void *fh, void *arg)
1358 {
1359         struct video_device *vfd = video_devdata(file);
1360         v4l2_std_id *id = arg;
1361
1362         /* Calls the specific handler */
1363         if (ops->vidioc_g_std)
1364                 return ops->vidioc_g_std(file, fh, arg);
1365         if (vfd->current_norm) {
1366                 *id = vfd->current_norm;
1367                 return 0;
1368         }
1369         return -ENOTTY;
1370 }
1371
1372 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1373                                 struct file *file, void *fh, void *arg)
1374 {
1375         struct video_device *vfd = video_devdata(file);
1376         v4l2_std_id *id = arg, norm;
1377         int ret;
1378
1379         norm = (*id) & vfd->tvnorms;
1380         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1381                 return -EINVAL;
1382
1383         /* Calls the specific handler */
1384         ret = ops->vidioc_s_std(file, fh, &norm);
1385
1386         /* Updates standard information */
1387         if (ret >= 0)
1388                 vfd->current_norm = norm;
1389         return ret;
1390 }
1391
1392 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1393                                 struct file *file, void *fh, void *arg)
1394 {
1395         struct video_device *vfd = video_devdata(file);
1396         v4l2_std_id *p = arg;
1397
1398         /*
1399          * If nothing detected, it should return all supported
1400          * standard.
1401          * Drivers just need to mask the std argument, in order
1402          * to remove the standards that don't apply from the mask.
1403          * This means that tuners, audio and video decoders can join
1404          * their efforts to improve the standards detection.
1405          */
1406         *p = vfd->tvnorms;
1407         return ops->vidioc_querystd(file, fh, arg);
1408 }
1409
1410 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1411                                 struct file *file, void *fh, void *arg)
1412 {
1413         struct video_device *vfd = video_devdata(file);
1414         struct v4l2_hw_freq_seek *p = arg;
1415         enum v4l2_tuner_type type;
1416
1417         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1418                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1419         if (p->type != type)
1420                 return -EINVAL;
1421         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1422 }
1423
1424 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1425                                 struct file *file, void *fh, void *arg)
1426 {
1427         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1428 }
1429
1430 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1431                                 struct file *file, void *fh, void *arg)
1432 {
1433         struct v4l2_requestbuffers *p = arg;
1434         int ret = check_fmt(file, p->type);
1435
1436         if (ret)
1437                 return ret;
1438
1439         CLEAR_AFTER_FIELD(p, memory);
1440
1441         return ops->vidioc_reqbufs(file, fh, p);
1442 }
1443
1444 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1445                                 struct file *file, void *fh, void *arg)
1446 {
1447         struct v4l2_buffer *p = arg;
1448         int ret = check_fmt(file, p->type);
1449
1450         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1451 }
1452
1453 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1454                                 struct file *file, void *fh, void *arg)
1455 {
1456         struct v4l2_buffer *p = arg;
1457         int ret = check_fmt(file, p->type);
1458
1459         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1460 }
1461
1462 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1463                                 struct file *file, void *fh, void *arg)
1464 {
1465         struct v4l2_buffer *p = arg;
1466         int ret = check_fmt(file, p->type);
1467
1468         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1469 }
1470
1471 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1472                                 struct file *file, void *fh, void *arg)
1473 {
1474         struct v4l2_create_buffers *create = arg;
1475         int ret = check_fmt(file, create->format.type);
1476
1477         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1478 }
1479
1480 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1481                                 struct file *file, void *fh, void *arg)
1482 {
1483         struct v4l2_buffer *b = arg;
1484         int ret = check_fmt(file, b->type);
1485
1486         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1487 }
1488
1489 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1490                                 struct file *file, void *fh, void *arg)
1491 {
1492         struct video_device *vfd = video_devdata(file);
1493         struct v4l2_streamparm *p = arg;
1494         v4l2_std_id std;
1495         int ret = check_fmt(file, p->type);
1496
1497         if (ret)
1498                 return ret;
1499         if (ops->vidioc_g_parm)
1500                 return ops->vidioc_g_parm(file, fh, p);
1501         std = vfd->current_norm;
1502         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1503             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1504                 return -EINVAL;
1505         p->parm.capture.readbuffers = 2;
1506         if (ops->vidioc_g_std)
1507                 ret = ops->vidioc_g_std(file, fh, &std);
1508         if (ret == 0)
1509                 v4l2_video_std_frame_period(std,
1510                             &p->parm.capture.timeperframe);
1511         return ret;
1512 }
1513
1514 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1515                                 struct file *file, void *fh, void *arg)
1516 {
1517         struct v4l2_streamparm *p = arg;
1518         int ret = check_fmt(file, p->type);
1519
1520         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1521 }
1522
1523 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1524                                 struct file *file, void *fh, void *arg)
1525 {
1526         struct video_device *vfd = video_devdata(file);
1527         struct v4l2_queryctrl *p = arg;
1528         struct v4l2_fh *vfh =
1529                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1530
1531         if (vfh && vfh->ctrl_handler)
1532                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1533         if (vfd->ctrl_handler)
1534                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1535         if (ops->vidioc_queryctrl)
1536                 return ops->vidioc_queryctrl(file, fh, p);
1537         return -ENOTTY;
1538 }
1539
1540 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1541                                 struct file *file, void *fh, void *arg)
1542 {
1543         struct video_device *vfd = video_devdata(file);
1544         struct v4l2_querymenu *p = arg;
1545         struct v4l2_fh *vfh =
1546                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1547
1548         if (vfh && vfh->ctrl_handler)
1549                 return v4l2_querymenu(vfh->ctrl_handler, p);
1550         if (vfd->ctrl_handler)
1551                 return v4l2_querymenu(vfd->ctrl_handler, p);
1552         if (ops->vidioc_querymenu)
1553                 return ops->vidioc_querymenu(file, fh, p);
1554         return -ENOTTY;
1555 }
1556
1557 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1558                                 struct file *file, void *fh, void *arg)
1559 {
1560         struct video_device *vfd = video_devdata(file);
1561         struct v4l2_control *p = arg;
1562         struct v4l2_fh *vfh =
1563                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1564         struct v4l2_ext_controls ctrls;
1565         struct v4l2_ext_control ctrl;
1566
1567         if (vfh && vfh->ctrl_handler)
1568                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1569         if (vfd->ctrl_handler)
1570                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1571         if (ops->vidioc_g_ctrl)
1572                 return ops->vidioc_g_ctrl(file, fh, p);
1573         if (ops->vidioc_g_ext_ctrls == NULL)
1574                 return -ENOTTY;
1575
1576         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1577         ctrls.count = 1;
1578         ctrls.controls = &ctrl;
1579         ctrl.id = p->id;
1580         ctrl.value = p->value;
1581         if (check_ext_ctrls(&ctrls, 1)) {
1582                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1583
1584                 if (ret == 0)
1585                         p->value = ctrl.value;
1586                 return ret;
1587         }
1588         return -EINVAL;
1589 }
1590
1591 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1592                                 struct file *file, void *fh, void *arg)
1593 {
1594         struct video_device *vfd = video_devdata(file);
1595         struct v4l2_control *p = arg;
1596         struct v4l2_fh *vfh =
1597                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1598         struct v4l2_ext_controls ctrls;
1599         struct v4l2_ext_control ctrl;
1600
1601         if (vfh && vfh->ctrl_handler)
1602                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1603         if (vfd->ctrl_handler)
1604                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1605         if (ops->vidioc_s_ctrl)
1606                 return ops->vidioc_s_ctrl(file, fh, p);
1607         if (ops->vidioc_s_ext_ctrls == NULL)
1608                 return -ENOTTY;
1609
1610         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1611         ctrls.count = 1;
1612         ctrls.controls = &ctrl;
1613         ctrl.id = p->id;
1614         ctrl.value = p->value;
1615         if (check_ext_ctrls(&ctrls, 1))
1616                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1617         return -EINVAL;
1618 }
1619
1620 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1621                                 struct file *file, void *fh, void *arg)
1622 {
1623         struct video_device *vfd = video_devdata(file);
1624         struct v4l2_ext_controls *p = arg;
1625         struct v4l2_fh *vfh =
1626                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1627
1628         p->error_idx = p->count;
1629         if (vfh && vfh->ctrl_handler)
1630                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1631         if (vfd->ctrl_handler)
1632                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1633         if (ops->vidioc_g_ext_ctrls == NULL)
1634                 return -ENOTTY;
1635         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1636                                         -EINVAL;
1637 }
1638
1639 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1640                                 struct file *file, void *fh, void *arg)
1641 {
1642         struct video_device *vfd = video_devdata(file);
1643         struct v4l2_ext_controls *p = arg;
1644         struct v4l2_fh *vfh =
1645                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1646
1647         p->error_idx = p->count;
1648         if (vfh && vfh->ctrl_handler)
1649                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1650         if (vfd->ctrl_handler)
1651                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1652         if (ops->vidioc_s_ext_ctrls == NULL)
1653                 return -ENOTTY;
1654         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1655                                         -EINVAL;
1656 }
1657
1658 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1659                                 struct file *file, void *fh, void *arg)
1660 {
1661         struct video_device *vfd = video_devdata(file);
1662         struct v4l2_ext_controls *p = arg;
1663         struct v4l2_fh *vfh =
1664                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1665
1666         p->error_idx = p->count;
1667         if (vfh && vfh->ctrl_handler)
1668                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1669         if (vfd->ctrl_handler)
1670                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1671         if (ops->vidioc_try_ext_ctrls == NULL)
1672                 return -ENOTTY;
1673         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1674                                         -EINVAL;
1675 }
1676
1677 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1678                                 struct file *file, void *fh, void *arg)
1679 {
1680         struct v4l2_crop *p = arg;
1681         struct v4l2_selection s = {
1682                 .type = p->type,
1683         };
1684         int ret;
1685
1686         if (ops->vidioc_g_crop)
1687                 return ops->vidioc_g_crop(file, fh, p);
1688         /* simulate capture crop using selection api */
1689
1690         /* crop means compose for output devices */
1691         if (V4L2_TYPE_IS_OUTPUT(p->type))
1692                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1693         else
1694                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1695
1696         ret = ops->vidioc_g_selection(file, fh, &s);
1697
1698         /* copying results to old structure on success */
1699         if (!ret)
1700                 p->c = s.r;
1701         return ret;
1702 }
1703
1704 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1705                                 struct file *file, void *fh, void *arg)
1706 {
1707         struct v4l2_crop *p = arg;
1708         struct v4l2_selection s = {
1709                 .type = p->type,
1710                 .r = p->c,
1711         };
1712
1713         if (ops->vidioc_s_crop)
1714                 return ops->vidioc_s_crop(file, fh, p);
1715         /* simulate capture crop using selection api */
1716
1717         /* crop means compose for output devices */
1718         if (V4L2_TYPE_IS_OUTPUT(p->type))
1719                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1720         else
1721                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1722
1723         return ops->vidioc_s_selection(file, fh, &s);
1724 }
1725
1726 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1727                                 struct file *file, void *fh, void *arg)
1728 {
1729         struct v4l2_cropcap *p = arg;
1730         struct v4l2_selection s = { .type = p->type };
1731         int ret;
1732
1733         if (ops->vidioc_cropcap)
1734                 return ops->vidioc_cropcap(file, fh, p);
1735
1736         /* obtaining bounds */
1737         if (V4L2_TYPE_IS_OUTPUT(p->type))
1738                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1739         else
1740                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1741
1742         ret = ops->vidioc_g_selection(file, fh, &s);
1743         if (ret)
1744                 return ret;
1745         p->bounds = s.r;
1746
1747         /* obtaining defrect */
1748         if (V4L2_TYPE_IS_OUTPUT(p->type))
1749                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1750         else
1751                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1752
1753         ret = ops->vidioc_g_selection(file, fh, &s);
1754         if (ret)
1755                 return ret;
1756         p->defrect = s.r;
1757
1758         /* setting trivial pixelaspect */
1759         p->pixelaspect.numerator = 1;
1760         p->pixelaspect.denominator = 1;
1761         return 0;
1762 }
1763
1764 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1765                                 struct file *file, void *fh, void *arg)
1766 {
1767         struct video_device *vfd = video_devdata(file);
1768         int ret;
1769
1770         if (vfd->v4l2_dev)
1771                 pr_info("%s: =================  START STATUS  =================\n",
1772                         vfd->v4l2_dev->name);
1773         ret = ops->vidioc_log_status(file, fh);
1774         if (vfd->v4l2_dev)
1775                 pr_info("%s: ==================  END STATUS  ==================\n",
1776                         vfd->v4l2_dev->name);
1777         return ret;
1778 }
1779
1780 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1781                                 struct file *file, void *fh, void *arg)
1782 {
1783 #ifdef CONFIG_VIDEO_ADV_DEBUG
1784         struct v4l2_dbg_register *p = arg;
1785
1786         if (!capable(CAP_SYS_ADMIN))
1787                 return -EPERM;
1788         return ops->vidioc_g_register(file, fh, p);
1789 #else
1790         return -ENOTTY;
1791 #endif
1792 }
1793
1794 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1795                                 struct file *file, void *fh, void *arg)
1796 {
1797 #ifdef CONFIG_VIDEO_ADV_DEBUG
1798         struct v4l2_dbg_register *p = arg;
1799
1800         if (!capable(CAP_SYS_ADMIN))
1801                 return -EPERM;
1802         return ops->vidioc_s_register(file, fh, p);
1803 #else
1804         return -ENOTTY;
1805 #endif
1806 }
1807
1808 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1809                                 struct file *file, void *fh, void *arg)
1810 {
1811         struct v4l2_dbg_chip_ident *p = arg;
1812
1813         p->ident = V4L2_IDENT_NONE;
1814         p->revision = 0;
1815         return ops->vidioc_g_chip_ident(file, fh, p);
1816 }
1817
1818 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1819                                 struct file *file, void *fh, void *arg)
1820 {
1821         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1822 }
1823
1824 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1825                                 struct file *file, void *fh, void *arg)
1826 {
1827         return ops->vidioc_subscribe_event(fh, arg);
1828 }
1829
1830 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1831                                 struct file *file, void *fh, void *arg)
1832 {
1833         return ops->vidioc_unsubscribe_event(fh, arg);
1834 }
1835
1836 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1837                                 struct file *file, void *fh, void *arg)
1838 {
1839         struct v4l2_sliced_vbi_cap *p = arg;
1840         int ret = check_fmt(file, p->type);
1841
1842         if (ret)
1843                 return ret;
1844
1845         /* Clear up to type, everything after type is zeroed already */
1846         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1847
1848         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1849 }
1850
1851 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1852                                 struct file *file, void *fh, void *arg)
1853 {
1854         struct video_device *vfd = video_devdata(file);
1855         struct v4l2_frequency_band *p = arg;
1856         enum v4l2_tuner_type type;
1857         int err;
1858
1859         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1860                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1861
1862         if (type != p->type)
1863                 return -EINVAL;
1864         if (ops->vidioc_enum_freq_bands)
1865                 return ops->vidioc_enum_freq_bands(file, fh, p);
1866         if (ops->vidioc_g_tuner) {
1867                 struct v4l2_tuner t = {
1868                         .index = p->tuner,
1869                         .type = type,
1870                 };
1871
1872                 if (p->index)
1873                         return -EINVAL;
1874                 err = ops->vidioc_g_tuner(file, fh, &t);
1875                 if (err)
1876                         return err;
1877                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1878                 p->rangelow = t.rangelow;
1879                 p->rangehigh = t.rangehigh;
1880                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1881                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1882                 return 0;
1883         }
1884         if (ops->vidioc_g_modulator) {
1885                 struct v4l2_modulator m = {
1886                         .index = p->tuner,
1887                 };
1888
1889                 if (type != V4L2_TUNER_RADIO)
1890                         return -EINVAL;
1891                 if (p->index)
1892                         return -EINVAL;
1893                 err = ops->vidioc_g_modulator(file, fh, &m);
1894                 if (err)
1895                         return err;
1896                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1897                 p->rangelow = m.rangelow;
1898                 p->rangehigh = m.rangehigh;
1899                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1900                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1901                 return 0;
1902         }
1903         return -ENOTTY;
1904 }
1905
1906 struct v4l2_ioctl_info {
1907         unsigned int ioctl;
1908         u32 flags;
1909         const char * const name;
1910         union {
1911                 u32 offset;
1912                 int (*func)(const struct v4l2_ioctl_ops *ops,
1913                                 struct file *file, void *fh, void *p);
1914         } u;
1915         void (*debug)(const void *arg, bool write_only);
1916 };
1917
1918 /* This control needs a priority check */
1919 #define INFO_FL_PRIO    (1 << 0)
1920 /* This control can be valid if the filehandle passes a control handler. */
1921 #define INFO_FL_CTRL    (1 << 1)
1922 /* This is a standard ioctl, no need for special code */
1923 #define INFO_FL_STD     (1 << 2)
1924 /* This is ioctl has its own function */
1925 #define INFO_FL_FUNC    (1 << 3)
1926 /* Queuing ioctl */
1927 #define INFO_FL_QUEUE   (1 << 4)
1928 /* Zero struct from after the field to the end */
1929 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1930         ((offsetof(struct v4l2_struct, field) +                 \
1931           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1932 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1933
1934 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1935         [_IOC_NR(_ioctl)] = {                                           \
1936                 .ioctl = _ioctl,                                        \
1937                 .flags = _flags | INFO_FL_STD,                          \
1938                 .name = #_ioctl,                                        \
1939                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1940                 .debug = _debug,                                        \
1941         }
1942
1943 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1944         [_IOC_NR(_ioctl)] = {                                           \
1945                 .ioctl = _ioctl,                                        \
1946                 .flags = _flags | INFO_FL_FUNC,                         \
1947                 .name = #_ioctl,                                        \
1948                 .u.func = _func,                                        \
1949                 .debug = _debug,                                        \
1950         }
1951
1952 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1953         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1954         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1955         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1956         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1957         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1958         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1959         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1960         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1961         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
1962         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1963         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1964         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1965         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1966         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1967         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1968         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1969         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1970         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1971         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1972         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1973         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1974         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1975         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1976         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1977         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1978         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1979         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1980         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
1981         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
1982         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
1983         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
1984         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
1985         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
1986         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
1987         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
1988         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
1989         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
1990         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
1991         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
1992         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
1993         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
1994         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
1995         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
1996         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
1997         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
1998         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
1999         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2000         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2001         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2002         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2003         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2004         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)),
2005         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2006         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2007         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2008         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2009         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2010         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2011         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2012         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2013         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2014         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2015         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2016         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2017         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2018         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2019         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2020         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
2021         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
2022         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
2023         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
2024         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2025         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2026         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2027         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2028         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2029         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2030         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2031         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2032         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2033         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2034         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2035 };
2036 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2037
2038 bool v4l2_is_known_ioctl(unsigned int cmd)
2039 {
2040         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2041                 return false;
2042         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2043 }
2044
2045 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2046 {
2047         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2048                 return vdev->lock;
2049         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2050                 return NULL;
2051         if (vdev->queue && vdev->queue->lock &&
2052                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2053                 return vdev->queue->lock;
2054         return vdev->lock;
2055 }
2056
2057 /* Common ioctl debug function. This function can be used by
2058    external ioctl messages as well as internal V4L ioctl */
2059 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2060 {
2061         const char *dir, *type;
2062
2063         if (prefix)
2064                 printk(KERN_DEBUG "%s: ", prefix);
2065
2066         switch (_IOC_TYPE(cmd)) {
2067         case 'd':
2068                 type = "v4l2_int";
2069                 break;
2070         case 'V':
2071                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2072                         type = "v4l2";
2073                         break;
2074                 }
2075                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2076                 return;
2077         default:
2078                 type = "unknown";
2079                 break;
2080         }
2081
2082         switch (_IOC_DIR(cmd)) {
2083         case _IOC_NONE:              dir = "--"; break;
2084         case _IOC_READ:              dir = "r-"; break;
2085         case _IOC_WRITE:             dir = "-w"; break;
2086         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2087         default:                     dir = "*ERR*"; break;
2088         }
2089         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2090                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2091 }
2092 EXPORT_SYMBOL(v4l_printk_ioctl);
2093
2094 static long __video_do_ioctl(struct file *file,
2095                 unsigned int cmd, void *arg)
2096 {
2097         struct video_device *vfd = video_devdata(file);
2098         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2099         bool write_only = false;
2100         struct v4l2_ioctl_info default_info;
2101         const struct v4l2_ioctl_info *info;
2102         void *fh = file->private_data;
2103         struct v4l2_fh *vfh = NULL;
2104         int use_fh_prio = 0;
2105         int debug = vfd->debug;
2106         long ret = -ENOTTY;
2107
2108         if (ops == NULL) {
2109                 pr_warn("%s: has no ioctl_ops.\n",
2110                                 video_device_node_name(vfd));
2111                 return ret;
2112         }
2113
2114         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2115                 vfh = file->private_data;
2116                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2117         }
2118
2119         if (v4l2_is_known_ioctl(cmd)) {
2120                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2121
2122                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2123                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2124                         goto done;
2125
2126                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2127                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2128                         if (ret)
2129                                 goto done;
2130                 }
2131         } else {
2132                 default_info.ioctl = cmd;
2133                 default_info.flags = 0;
2134                 default_info.debug = v4l_print_default;
2135                 info = &default_info;
2136         }
2137
2138         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2139         if (write_only && debug > V4L2_DEBUG_IOCTL) {
2140                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2141                 pr_cont(": ");
2142                 info->debug(arg, write_only);
2143         }
2144         if (info->flags & INFO_FL_STD) {
2145                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2146                 const void *p = vfd->ioctl_ops;
2147                 const vidioc_op *vidioc = p + info->u.offset;
2148
2149                 ret = (*vidioc)(file, fh, arg);
2150         } else if (info->flags & INFO_FL_FUNC) {
2151                 ret = info->u.func(ops, file, fh, arg);
2152         } else if (!ops->vidioc_default) {
2153                 ret = -ENOTTY;
2154         } else {
2155                 ret = ops->vidioc_default(file, fh,
2156                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2157                         cmd, arg);
2158         }
2159
2160 done:
2161         if (debug) {
2162                 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2163                         if (ret < 0)
2164                                 printk(KERN_DEBUG "%s: error %ld\n",
2165                                         video_device_node_name(vfd), ret);
2166                         return ret;
2167                 }
2168                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2169                 if (ret < 0)
2170                         pr_cont(": error %ld\n", ret);
2171                 else if (debug == V4L2_DEBUG_IOCTL)
2172                         pr_cont("\n");
2173                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2174                         info->debug(arg, write_only);
2175                 else {
2176                         pr_cont(": ");
2177                         info->debug(arg, write_only);
2178                 }
2179         }
2180
2181         return ret;
2182 }
2183
2184 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2185                             void * __user *user_ptr, void ***kernel_ptr)
2186 {
2187         int ret = 0;
2188
2189         switch (cmd) {
2190         case VIDIOC_PREPARE_BUF:
2191         case VIDIOC_QUERYBUF:
2192         case VIDIOC_QBUF:
2193         case VIDIOC_DQBUF: {
2194                 struct v4l2_buffer *buf = parg;
2195
2196                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2197                         if (buf->length > VIDEO_MAX_PLANES) {
2198                                 ret = -EINVAL;
2199                                 break;
2200                         }
2201                         *user_ptr = (void __user *)buf->m.planes;
2202                         *kernel_ptr = (void *)&buf->m.planes;
2203                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2204                         ret = 1;
2205                 }
2206                 break;
2207         }
2208
2209         case VIDIOC_SUBDEV_G_EDID:
2210         case VIDIOC_SUBDEV_S_EDID: {
2211                 struct v4l2_subdev_edid *edid = parg;
2212
2213                 if (edid->blocks) {
2214                         if (edid->blocks > 256) {
2215                                 ret = -EINVAL;
2216                                 break;
2217                         }
2218                         *user_ptr = (void __user *)edid->edid;
2219                         *kernel_ptr = (void *)&edid->edid;
2220                         *array_size = edid->blocks * 128;
2221                         ret = 1;
2222                 }
2223                 break;
2224         }
2225
2226         case VIDIOC_S_EXT_CTRLS:
2227         case VIDIOC_G_EXT_CTRLS:
2228         case VIDIOC_TRY_EXT_CTRLS: {
2229                 struct v4l2_ext_controls *ctrls = parg;
2230
2231                 if (ctrls->count != 0) {
2232                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2233                                 ret = -EINVAL;
2234                                 break;
2235                         }
2236                         *user_ptr = (void __user *)ctrls->controls;
2237                         *kernel_ptr = (void *)&ctrls->controls;
2238                         *array_size = sizeof(struct v4l2_ext_control)
2239                                     * ctrls->count;
2240                         ret = 1;
2241                 }
2242                 break;
2243         }
2244         }
2245
2246         return ret;
2247 }
2248
2249 long
2250 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2251                v4l2_kioctl func)
2252 {
2253         char    sbuf[128];
2254         void    *mbuf = NULL;
2255         void    *parg = (void *)arg;
2256         long    err  = -EINVAL;
2257         bool    has_array_args;
2258         size_t  array_size = 0;
2259         void __user *user_ptr = NULL;
2260         void    **kernel_ptr = NULL;
2261
2262         /*  Copy arguments into temp kernel buffer  */
2263         if (_IOC_DIR(cmd) != _IOC_NONE) {
2264                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2265                         parg = sbuf;
2266                 } else {
2267                         /* too big to allocate from stack */
2268                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2269                         if (NULL == mbuf)
2270                                 return -ENOMEM;
2271                         parg = mbuf;
2272                 }
2273
2274                 err = -EFAULT;
2275                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2276                         unsigned int n = _IOC_SIZE(cmd);
2277
2278                         /*
2279                          * In some cases, only a few fields are used as input,
2280                          * i.e. when the app sets "index" and then the driver
2281                          * fills in the rest of the structure for the thing
2282                          * with that index.  We only need to copy up the first
2283                          * non-input field.
2284                          */
2285                         if (v4l2_is_known_ioctl(cmd)) {
2286                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2287                                 if (flags & INFO_FL_CLEAR_MASK)
2288                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2289                         }
2290
2291                         if (copy_from_user(parg, (void __user *)arg, n))
2292                                 goto out;
2293
2294                         /* zero out anything we don't copy from userspace */
2295                         if (n < _IOC_SIZE(cmd))
2296                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2297                 } else {
2298                         /* read-only ioctl */
2299                         memset(parg, 0, _IOC_SIZE(cmd));
2300                 }
2301         }
2302
2303         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2304         if (err < 0)
2305                 goto out;
2306         has_array_args = err;
2307
2308         if (has_array_args) {
2309                 /*
2310                  * When adding new types of array args, make sure that the
2311                  * parent argument to ioctl (which contains the pointer to the
2312                  * array) fits into sbuf (so that mbuf will still remain
2313                  * unused up to here).
2314                  */
2315                 mbuf = kmalloc(array_size, GFP_KERNEL);
2316                 err = -ENOMEM;
2317                 if (NULL == mbuf)
2318                         goto out_array_args;
2319                 err = -EFAULT;
2320                 if (copy_from_user(mbuf, user_ptr, array_size))
2321                         goto out_array_args;
2322                 *kernel_ptr = mbuf;
2323         }
2324
2325         /* Handles IOCTL */
2326         err = func(file, cmd, parg);
2327         if (err == -ENOIOCTLCMD)
2328                 err = -ENOTTY;
2329
2330         if (has_array_args) {
2331                 *kernel_ptr = user_ptr;
2332                 if (copy_to_user(user_ptr, mbuf, array_size))
2333                         err = -EFAULT;
2334                 goto out_array_args;
2335         }
2336         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2337            results that must be returned. */
2338         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2339                 goto out;
2340
2341 out_array_args:
2342         /*  Copy results into user buffer  */
2343         switch (_IOC_DIR(cmd)) {
2344         case _IOC_READ:
2345         case (_IOC_WRITE | _IOC_READ):
2346                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2347                         err = -EFAULT;
2348                 break;
2349         }
2350
2351 out:
2352         kfree(mbuf);
2353         return err;
2354 }
2355 EXPORT_SYMBOL(video_usercopy);
2356
2357 long video_ioctl2(struct file *file,
2358                unsigned int cmd, unsigned long arg)
2359 {
2360         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2361 }
2362 EXPORT_SYMBOL(video_ioctl2);