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         [V4L2_MEMORY_DMABUF] = "dmabuf",
 159 };
 160
 161 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 162
 163 /* ------------------------------------------------------------------ */
 164 /* debug help functions                                               */
 165
 166 static void v4l_print_querycap(const void *arg, bool write_only)
 167 {
 168         const struct v4l2_capability *p = arg;
 169
 170         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 171                 "capabilities=0x%08x, device_caps=0x%08x\n",
 172                 (int)sizeof(p->driver), p->driver,
 173                 (int)sizeof(p->card), p->card,
 174                 (int)sizeof(p->bus_info), p->bus_info,
 175                 p->version, p->capabilities, p->device_caps);
 176 }
 177
 178 static void v4l_print_enuminput(const void *arg, bool write_only)
 179 {
 180         const struct v4l2_input *p = arg;
 181
 182         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 183                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 184                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 185                 p->tuner, (unsigned long long)p->std, p->status,
 186                 p->capabilities);
 187 }
 188
 189 static void v4l_print_enumoutput(const void *arg, bool write_only)
 190 {
 191         const struct v4l2_output *p = arg;
 192
 193         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 194                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 195                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 196                 p->modulator, (unsigned long long)p->std, p->capabilities);
 197 }
 198
 199 static void v4l_print_audio(const void *arg, bool write_only)
 200 {
 201         const struct v4l2_audio *p = arg;
 202
 203         if (write_only)
 204                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 205         else
 206                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 207                         p->index, (int)sizeof(p->name), p->name,
 208                         p->capability, p->mode);
 209 }
 210
 211 static void v4l_print_audioout(const void *arg, bool write_only)
 212 {
 213         const struct v4l2_audioout *p = arg;
 214
 215         if (write_only)
 216                 pr_cont("index=%u\n", p->index);
 217         else
 218                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 219                         p->index, (int)sizeof(p->name), p->name,
 220                         p->capability, p->mode);
 221 }
 222
 223 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 224 {
 225         const struct v4l2_fmtdesc *p = arg;
 226
 227         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 228                 p->index, prt_names(p->type, v4l2_type_names),
 229                 p->flags, (p->pixelformat & 0xff),
 230                 (p->pixelformat >>  8) & 0xff,
 231                 (p->pixelformat >> 16) & 0xff,
 232                 (p->pixelformat >> 24) & 0xff,
 233                 (int)sizeof(p->description), p->description);
 234 }
 235
 236 static void v4l_print_format(const void *arg, bool write_only)
 237 {
 238         const struct v4l2_format *p = arg;
 239         const struct v4l2_pix_format *pix;
 240         const struct v4l2_pix_format_mplane *mp;
 241         const struct v4l2_vbi_format *vbi;
 242         const struct v4l2_sliced_vbi_format *sliced;
 243         const struct v4l2_window *win;
 244         const struct v4l2_clip *clip;
 245         unsigned i;
 246
 247         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 248         switch (p->type) {
 249         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 250         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 251                 pix = &p->fmt.pix;
 252                 pr_cont(", width=%u, height=%u, "
 253                         "pixelformat=%c%c%c%c, field=%s, "
 254                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 255                         pix->width, pix->height,
 256                         (pix->pixelformat & 0xff),
 257                         (pix->pixelformat >>  8) & 0xff,
 258                         (pix->pixelformat >> 16) & 0xff,
 259                         (pix->pixelformat >> 24) & 0xff,
 260                         prt_names(pix->field, v4l2_field_names),
 261                         pix->bytesperline, pix->sizeimage,
 262                         pix->colorspace);
 263                 break;
 264         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 265         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 266                 mp = &p->fmt.pix_mp;
 267                 pr_cont(", width=%u, height=%u, "
 268                         "format=%c%c%c%c, field=%s, "
 269                         "colorspace=%d, num_planes=%u\n",
 270                         mp->width, mp->height,
 271                         (mp->pixelformat & 0xff),
 272                         (mp->pixelformat >>  8) & 0xff,
 273                         (mp->pixelformat >> 16) & 0xff,
 274                         (mp->pixelformat >> 24) & 0xff,
 275                         prt_names(mp->field, v4l2_field_names),
 276                         mp->colorspace, mp->num_planes);
 277                 for (i = 0; i < mp->num_planes; i++)
 278                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 279                                         mp->plane_fmt[i].bytesperline,
 280                                         mp->plane_fmt[i].sizeimage);
 281                 break;
 282         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 283         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 284                 win = &p->fmt.win;
 285                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 286                         "chromakey=0x%08x, bitmap=%p, "
 287                         "global_alpha=0x%02x\n",
 288                         win->w.width, win->w.height,
 289                         win->w.left, win->w.top,
 290                         prt_names(win->field, v4l2_field_names),
 291                         win->chromakey, win->bitmap, win->global_alpha);
 292                 clip = win->clips;
 293                 for (i = 0; i < win->clipcount; i++) {
 294                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 295                                         i, clip->c.width, clip->c.height,
 296                                         clip->c.left, clip->c.top);
 297                         clip = clip->next;
 298                 }
 299                 break;
 300         case V4L2_BUF_TYPE_VBI_CAPTURE:
 301         case V4L2_BUF_TYPE_VBI_OUTPUT:
 302                 vbi = &p->fmt.vbi;
 303                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 304                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 305                         vbi->sampling_rate, vbi->offset,
 306                         vbi->samples_per_line,
 307                         (vbi->sample_format & 0xff),
 308                         (vbi->sample_format >>  8) & 0xff,
 309                         (vbi->sample_format >> 16) & 0xff,
 310                         (vbi->sample_format >> 24) & 0xff,
 311                         vbi->start[0], vbi->start[1],
 312                         vbi->count[0], vbi->count[1]);
 313                 break;
 314         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 315         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 316                 sliced = &p->fmt.sliced;
 317                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 318                                 sliced->service_set, sliced->io_size);
 319                 for (i = 0; i < 24; i++)
 320                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 321                                 sliced->service_lines[0][i],
 322                                 sliced->service_lines[1][i]);
 323                 break;
 324         }
 325 }
 326
 327 static void v4l_print_framebuffer(const void *arg, bool write_only)
 328 {
 329         const struct v4l2_framebuffer *p = arg;
 330
 331         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 332                 "height=%u, pixelformat=%c%c%c%c, "
 333                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 334                         p->capability, p->flags, p->base,
 335                         p->fmt.width, p->fmt.height,
 336                         (p->fmt.pixelformat & 0xff),
 337                         (p->fmt.pixelformat >>  8) & 0xff,
 338                         (p->fmt.pixelformat >> 16) & 0xff,
 339                         (p->fmt.pixelformat >> 24) & 0xff,
 340                         p->fmt.bytesperline, p->fmt.sizeimage,
 341                         p->fmt.colorspace);
 342 }
 343
 344 static void v4l_print_buftype(const void *arg, bool write_only)
 345 {
 346         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 347 }
 348
 349 static void v4l_print_modulator(const void *arg, bool write_only)
 350 {
 351         const struct v4l2_modulator *p = arg;
 352
 353         if (write_only)
 354                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 355         else
 356                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 357                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 358                         p->index, (int)sizeof(p->name), p->name, p->capability,
 359                         p->rangelow, p->rangehigh, p->txsubchans);
 360 }
 361
 362 static void v4l_print_tuner(const void *arg, bool write_only)
 363 {
 364         const struct v4l2_tuner *p = arg;
 365
 366         if (write_only)
 367                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 368         else
 369                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 370                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 371                         "rxsubchans=0x%x, audmode=%u\n",
 372                         p->index, (int)sizeof(p->name), p->name, p->type,
 373                         p->capability, p->rangelow,
 374                         p->rangehigh, p->signal, p->afc,
 375                         p->rxsubchans, p->audmode);
 376 }
 377
 378 static void v4l_print_frequency(const void *arg, bool write_only)
 379 {
 380         const struct v4l2_frequency *p = arg;
 381
 382         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 383                                 p->tuner, p->type, p->frequency);
 384 }
 385
 386 static void v4l_print_standard(const void *arg, bool write_only)
 387 {
 388         const struct v4l2_standard *p = arg;
 389
 390         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 391                 "framelines=%u\n", p->index,
 392                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 393                 p->frameperiod.numerator,
 394                 p->frameperiod.denominator,
 395                 p->framelines);
 396 }
 397
 398 static void v4l_print_std(const void *arg, bool write_only)
 399 {
 400         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 401 }
 402
 403 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 404 {
 405         const struct v4l2_hw_freq_seek *p = arg;
 406
 407         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 408                 "rangelow=%u, rangehigh=%u\n",
 409                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 410                 p->rangelow, p->rangehigh);
 411 }
 412
 413 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 414 {
 415         const struct v4l2_requestbuffers *p = arg;
 416
 417         pr_cont("count=%d, type=%s, memory=%s\n",
 418                 p->count,
 419                 prt_names(p->type, v4l2_type_names),
 420                 prt_names(p->memory, v4l2_memory_names));
 421 }
 422
 423 static void v4l_print_buffer(const void *arg, bool write_only)
 424 {
 425         const struct v4l2_buffer *p = arg;
 426         const struct v4l2_timecode *tc = &p->timecode;
 427         const struct v4l2_plane *plane;
 428         int i;
 429
 430         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 431                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 432                         p->timestamp.tv_sec / 3600,
 433                         (int)(p->timestamp.tv_sec / 60) % 60,
 434                         (int)(p->timestamp.tv_sec % 60),
 435                         (long)p->timestamp.tv_usec,
 436                         p->index,
 437                         prt_names(p->type, v4l2_type_names),
 438                         p->flags, prt_names(p->field, v4l2_field_names),
 439                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 440
 441         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 442                 pr_cont("\n");
 443                 for (i = 0; i < p->length; ++i) {
 444                         plane = &p->m.planes[i];
 445                         printk(KERN_DEBUG
 446                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 447                                 "offset/userptr=0x%lx, length=%d\n",
 448                                 i, plane->bytesused, plane->data_offset,
 449                                 plane->m.userptr, plane->length);
 450                 }
 451         } else {
 452                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 453                         p->bytesused, p->m.userptr, p->length);
 454         }
 455
 456         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 457                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 458                         tc->hours, tc->minutes, tc->seconds,
 459                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 460 }
 461
 462 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 463 {
 464         const struct v4l2_exportbuffer *p = arg;
 465
 466         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 467                 p->fd, prt_names(p->type, v4l2_type_names),
 468                 p->index, p->plane, p->flags);
 469 }
 470
 471 static void v4l_print_create_buffers(const void *arg, bool write_only)
 472 {
 473         const struct v4l2_create_buffers *p = arg;
 474
 475         pr_cont("index=%d, count=%d, memory=%s, ",
 476                         p->index, p->count,
 477                         prt_names(p->memory, v4l2_memory_names));
 478         v4l_print_format(&p->format, write_only);
 479 }
 480
 481 static void v4l_print_streamparm(const void *arg, bool write_only)
 482 {
 483         const struct v4l2_streamparm *p = arg;
 484
 485         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 486
 487         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 488             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 489                 const struct v4l2_captureparm *c = &p->parm.capture;
 490
 491                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 492                         "extendedmode=%d, readbuffers=%d\n",
 493                         c->capability, c->capturemode,
 494                         c->timeperframe.numerator, c->timeperframe.denominator,
 495                         c->extendedmode, c->readbuffers);
 496         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 497                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 498                 const struct v4l2_outputparm *c = &p->parm.output;
 499
 500                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 501                         "extendedmode=%d, writebuffers=%d\n",
 502                         c->capability, c->outputmode,
 503                         c->timeperframe.numerator, c->timeperframe.denominator,
 504                         c->extendedmode, c->writebuffers);
 505         }
 506 }
 507
 508 static void v4l_print_queryctrl(const void *arg, bool write_only)
 509 {
 510         const struct v4l2_queryctrl *p = arg;
 511
 512         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 513                 "step=%d, default=%d, flags=0x%08x\n",
 514                         p->id, p->type, (int)sizeof(p->name), p->name,
 515                         p->minimum, p->maximum,
 516                         p->step, p->default_value, p->flags);
 517 }
 518
 519 static void v4l_print_querymenu(const void *arg, bool write_only)
 520 {
 521         const struct v4l2_querymenu *p = arg;
 522
 523         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 524 }
 525
 526 static void v4l_print_control(const void *arg, bool write_only)
 527 {
 528         const struct v4l2_control *p = arg;
 529
 530         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 531 }
 532
 533 static void v4l_print_ext_controls(const void *arg, bool write_only)
 534 {
 535         const struct v4l2_ext_controls *p = arg;
 536         int i;
 537
 538         pr_cont("class=0x%x, count=%d, error_idx=%d",
 539                         p->ctrl_class, p->count, p->error_idx);
 540         for (i = 0; i < p->count; i++) {
 541                 if (p->controls[i].size)
 542                         pr_cont(", id/val=0x%x/0x%x",
 543                                 p->controls[i].id, p->controls[i].value);
 544                 else
 545                         pr_cont(", id/size=0x%x/%u",
 546                                 p->controls[i].id, p->controls[i].size);
 547         }
 548         pr_cont("\n");
 549 }
 550
 551 static void v4l_print_cropcap(const void *arg, bool write_only)
 552 {
 553         const struct v4l2_cropcap *p = arg;
 554
 555         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 556                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 557                 "pixelaspect %d/%d\n",
 558                 prt_names(p->type, v4l2_type_names),
 559                 p->bounds.width, p->bounds.height,
 560                 p->bounds.left, p->bounds.top,
 561                 p->defrect.width, p->defrect.height,
 562                 p->defrect.left, p->defrect.top,
 563                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 564 }
 565
 566 static void v4l_print_crop(const void *arg, bool write_only)
 567 {
 568         const struct v4l2_crop *p = arg;
 569
 570         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 571                 prt_names(p->type, v4l2_type_names),
 572                 p->c.width, p->c.height,
 573                 p->c.left, p->c.top);
 574 }
 575
 576 static void v4l_print_selection(const void *arg, bool write_only)
 577 {
 578         const struct v4l2_selection *p = arg;
 579
 580         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 581                 prt_names(p->type, v4l2_type_names),
 582                 p->target, p->flags,
 583                 p->r.width, p->r.height, p->r.left, p->r.top);
 584 }
 585
 586 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 587 {
 588         const struct v4l2_jpegcompression *p = arg;
 589
 590         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 591                 "COM_len=%d, jpeg_markers=0x%x\n",
 592                 p->quality, p->APPn, p->APP_len,
 593                 p->COM_len, p->jpeg_markers);
 594 }
 595
 596 static void v4l_print_enc_idx(const void *arg, bool write_only)
 597 {
 598         const struct v4l2_enc_idx *p = arg;
 599
 600         pr_cont("entries=%d, entries_cap=%d\n",
 601                         p->entries, p->entries_cap);
 602 }
 603
 604 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 605 {
 606         const struct v4l2_encoder_cmd *p = arg;
 607
 608         pr_cont("cmd=%d, flags=0x%x\n",
 609                         p->cmd, p->flags);
 610 }
 611
 612 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 613 {
 614         const struct v4l2_decoder_cmd *p = arg;
 615
 616         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 617
 618         if (p->cmd == V4L2_DEC_CMD_START)
 619                 pr_info("speed=%d, format=%u\n",
 620                                 p->start.speed, p->start.format);
 621         else if (p->cmd == V4L2_DEC_CMD_STOP)
 622                 pr_info("pts=%llu\n", p->stop.pts);
 623 }
 624
 625 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 626 {
 627         const struct v4l2_dbg_chip_ident *p = arg;
 628
 629         pr_cont("type=%u, ", p->match.type);
 630         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 631                 pr_cont("name=%.*s, ",
 632                                 (int)sizeof(p->match.name), p->match.name);
 633         else
 634                 pr_cont("addr=%u, ", p->match.addr);
 635         pr_cont("chip_ident=%u, revision=0x%x\n",
 636                         p->ident, p->revision);
 637 }
 638
 639 static void v4l_print_dbg_register(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_dbg_register *p = arg;
 642
 643         pr_cont("type=%u, ", p->match.type);
 644         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 645                 pr_cont("name=%.*s, ",
 646                                 (int)sizeof(p->match.name), p->match.name);
 647         else
 648                 pr_cont("addr=%u, ", p->match.addr);
 649         pr_cont("reg=0x%llx, val=0x%llx\n",
 650                         p->reg, p->val);
 651 }
 652
 653 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
 654 {
 655         const struct v4l2_dv_enum_preset *p = arg;
 656
 657         pr_cont("index=%u, preset=%u, name=%.*s, width=%u, height=%u\n",
 658                         p->index, p->preset,
 659                         (int)sizeof(p->name), p->name, p->width, p->height);
 660 }
 661
 662 static void v4l_print_dv_preset(const void *arg, bool write_only)
 663 {
 664         const struct v4l2_dv_preset *p = arg;
 665
 666         pr_cont("preset=%u\n", p->preset);
 667 }
 668
 669 static void v4l_print_dv_timings(const void *arg, bool write_only)
 670 {
 671         const struct v4l2_dv_timings *p = arg;
 672
 673         switch (p->type) {
 674         case V4L2_DV_BT_656_1120:
 675                 pr_cont("type=bt-656/1120, interlaced=%u, "
 676                         "pixelclock=%llu, "
 677                         "width=%u, height=%u, polarities=0x%x, "
 678                         "hfrontporch=%u, hsync=%u, "
 679                         "hbackporch=%u, vfrontporch=%u, "
 680                         "vsync=%u, vbackporch=%u, "
 681                         "il_vfrontporch=%u, il_vsync=%u, "
 682                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 683                                 p->bt.interlaced, p->bt.pixelclock,
 684                                 p->bt.width, p->bt.height,
 685                                 p->bt.polarities, p->bt.hfrontporch,
 686                                 p->bt.hsync, p->bt.hbackporch,
 687                                 p->bt.vfrontporch, p->bt.vsync,
 688                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 689                                 p->bt.il_vsync, p->bt.il_vbackporch,
 690                                 p->bt.standards, p->bt.flags);
 691                 break;
 692         default:
 693                 pr_cont("type=%d\n", p->type);
 694                 break;
 695         }
 696 }
 697
 698 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 699 {
 700         const struct v4l2_enum_dv_timings *p = arg;
 701
 702         pr_cont("index=%u, ", p->index);
 703         v4l_print_dv_timings(&p->timings, write_only);
 704 }
 705
 706 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 707 {
 708         const struct v4l2_dv_timings_cap *p = arg;
 709
 710         switch (p->type) {
 711         case V4L2_DV_BT_656_1120:
 712                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 713                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 714                         p->bt.min_width, p->bt.max_width,
 715                         p->bt.min_height, p->bt.max_height,
 716                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 717                         p->bt.standards, p->bt.capabilities);
 718                 break;
 719         default:
 720                 pr_cont("type=%u\n", p->type);
 721                 break;
 722         }
 723 }
 724
 725 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 726 {
 727         const struct v4l2_frmsizeenum *p = arg;
 728
 729         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 730                         p->index,
 731                         (p->pixel_format & 0xff),
 732                         (p->pixel_format >>  8) & 0xff,
 733                         (p->pixel_format >> 16) & 0xff,
 734                         (p->pixel_format >> 24) & 0xff,
 735                         p->type);
 736         switch (p->type) {
 737         case V4L2_FRMSIZE_TYPE_DISCRETE:
 738                 pr_cont(" wxh=%ux%u\n",
 739                         p->discrete.width, p->discrete.height);
 740                 break;
 741         case V4L2_FRMSIZE_TYPE_STEPWISE:
 742                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 743                                 p->stepwise.min_width,  p->stepwise.min_height,
 744                                 p->stepwise.step_width, p->stepwise.step_height,
 745                                 p->stepwise.max_width,  p->stepwise.max_height);
 746                 break;
 747         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 748                 /* fall through */
 749         default:
 750                 pr_cont("\n");
 751                 break;
 752         }
 753 }
 754
 755 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 756 {
 757         const struct v4l2_frmivalenum *p = arg;
 758
 759         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 760                         p->index,
 761                         (p->pixel_format & 0xff),
 762                         (p->pixel_format >>  8) & 0xff,
 763                         (p->pixel_format >> 16) & 0xff,
 764                         (p->pixel_format >> 24) & 0xff,
 765                         p->width, p->height, p->type);
 766         switch (p->type) {
 767         case V4L2_FRMIVAL_TYPE_DISCRETE:
 768                 pr_cont(" fps=%d/%d\n",
 769                                 p->discrete.numerator,
 770                                 p->discrete.denominator);
 771                 break;
 772         case V4L2_FRMIVAL_TYPE_STEPWISE:
 773                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 774                                 p->stepwise.min.numerator,
 775                                 p->stepwise.min.denominator,
 776                                 p->stepwise.max.numerator,
 777                                 p->stepwise.max.denominator,
 778                                 p->stepwise.step.numerator,
 779                                 p->stepwise.step.denominator);
 780                 break;
 781         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 782                 /* fall through */
 783         default:
 784                 pr_cont("\n");
 785                 break;
 786         }
 787 }
 788
 789 static void v4l_print_event(const void *arg, bool write_only)
 790 {
 791         const struct v4l2_event *p = arg;
 792         const struct v4l2_event_ctrl *c;
 793
 794         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 795                 "timestamp=%lu.%9.9lu\n",
 796                         p->type, p->pending, p->sequence, p->id,
 797                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 798         switch (p->type) {
 799         case V4L2_EVENT_VSYNC:
 800                 printk(KERN_DEBUG "field=%s\n",
 801                         prt_names(p->u.vsync.field, v4l2_field_names));
 802                 break;
 803         case V4L2_EVENT_CTRL:
 804                 c = &p->u.ctrl;
 805                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 806                         c->changes, c->type);
 807                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 808                         pr_cont("value64=%lld, ", c->value64);
 809                 else
 810                         pr_cont("value=%d, ", c->value);
 811                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 812                                 " default_value=%d\n",
 813                         c->flags, c->minimum, c->maximum,
 814                         c->step, c->default_value);
 815                 break;
 816         case V4L2_EVENT_FRAME_SYNC:
 817                 pr_cont("frame_sequence=%u\n",
 818                         p->u.frame_sync.frame_sequence);
 819                 break;
 820         }
 821 }
 822
 823 static void v4l_print_event_subscription(const void *arg, bool write_only)
 824 {
 825         const struct v4l2_event_subscription *p = arg;
 826
 827         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 828                         p->type, p->id, p->flags);
 829 }
 830
 831 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 832 {
 833         const struct v4l2_sliced_vbi_cap *p = arg;
 834         int i;
 835
 836         pr_cont("type=%s, service_set=0x%08x\n",
 837                         prt_names(p->type, v4l2_type_names), p->service_set);
 838         for (i = 0; i < 24; i++)
 839                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 840                                 p->service_lines[0][i],
 841                                 p->service_lines[1][i]);
 842 }
 843
 844 static void v4l_print_freq_band(const void *arg, bool write_only)
 845 {
 846         const struct v4l2_frequency_band *p = arg;
 847
 848         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 849                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 850                         p->tuner, p->type, p->index,
 851                         p->capability, p->rangelow,
 852                         p->rangehigh, p->modulation);
 853 }
 854
 855 static void v4l_print_u32(const void *arg, bool write_only)
 856 {
 857         pr_cont("value=%u\n", *(const u32 *)arg);
 858 }
 859
 860 static void v4l_print_newline(const void *arg, bool write_only)
 861 {
 862         pr_cont("\n");
 863 }
 864
 865 static void v4l_print_default(const void *arg, bool write_only)
 866 {
 867         pr_cont("driver-specific ioctl\n");
 868 }
 869
 870 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 871 {
 872         __u32 i;
 873
 874         /* zero the reserved fields */
 875         c->reserved[0] = c->reserved[1] = 0;
 876         for (i = 0; i < c->count; i++)
 877                 c->controls[i].reserved2[0] = 0;
 878
 879         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 880            when using extended controls.
 881            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 882            is it allowed for backwards compatibility.
 883          */
 884         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 885                 return 0;
 886         /* Check that all controls are from the same control class. */
 887         for (i = 0; i < c->count; i++) {
 888                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 889                         c->error_idx = i;
 890                         return 0;
 891                 }
 892         }
 893         return 1;
 894 }
 895
 896 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 897 {
 898         struct video_device *vfd = video_devdata(file);
 899         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 900         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 901         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 902         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 903         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 904
 905         if (ops == NULL)
 906                 return -EINVAL;
 907
 908         switch (type) {
 909         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 910                 if (is_vid && is_rx &&
 911                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 912                         return 0;
 913                 break;
 914         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 915                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 916                         return 0;
 917                 break;
 918         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 919                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 920                         return 0;
 921                 break;
 922         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 923                 if (is_vid && is_tx &&
 924                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 925                         return 0;
 926                 break;
 927         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 928                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 929                         return 0;
 930                 break;
 931         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 932                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 933                         return 0;
 934                 break;
 935         case V4L2_BUF_TYPE_VBI_CAPTURE:
 936                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 937                         return 0;
 938                 break;
 939         case V4L2_BUF_TYPE_VBI_OUTPUT:
 940                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 941                         return 0;
 942                 break;
 943         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 944                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 945                         return 0;
 946                 break;
 947         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 948                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 949                         return 0;
 950                 break;
 951         default:
 952                 break;
 953         }
 954         return -EINVAL;
 955 }
 956
 957 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 958                                 struct file *file, void *fh, void *arg)
 959 {
 960         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 961
 962         cap->version = LINUX_VERSION_CODE;
 963         return ops->vidioc_querycap(file, fh, cap);
 964 }
 965
 966 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 967                                 struct file *file, void *fh, void *arg)
 968 {
 969         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 970 }
 971
 972 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 973                                 struct file *file, void *fh, void *arg)
 974 {
 975         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 976 }
 977
 978 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 979                                 struct file *file, void *fh, void *arg)
 980 {
 981         struct video_device *vfd;
 982         u32 *p = arg;
 983
 984         if (ops->vidioc_g_priority)
 985                 return ops->vidioc_g_priority(file, fh, arg);
 986         vfd = video_devdata(file);
 987         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 988         return 0;
 989 }
 990
 991 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 992                                 struct file *file, void *fh, void *arg)
 993 {
 994         struct video_device *vfd;
 995         struct v4l2_fh *vfh;
 996         u32 *p = arg;
 997
 998         if (ops->vidioc_s_priority)
 999                 return ops->vidioc_s_priority(file, fh, *p);
1000         vfd = video_devdata(file);
1001         vfh = file->private_data;
1002         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1003 }
1004
1005 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1006                                 struct file *file, void *fh, void *arg)
1007 {
1008         struct v4l2_input *p = arg;
1009
1010         /*
1011          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
1012          * CAP_STD here based on ioctl handler provided by the
1013          * driver. If the driver doesn't support these
1014          * for a specific input, it must override these flags.
1015          */
1016         if (ops->vidioc_s_std)
1017                 p->capabilities |= V4L2_IN_CAP_STD;
1018         if (ops->vidioc_s_dv_preset)
1019                 p->capabilities |= V4L2_IN_CAP_PRESETS;
1020         if (ops->vidioc_s_dv_timings)
1021                 p->capabilities |= V4L2_IN_CAP_DV_TIMINGS;
1022
1023         return ops->vidioc_enum_input(file, fh, p);
1024 }
1025
1026 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1027                                 struct file *file, void *fh, void *arg)
1028 {
1029         struct v4l2_output *p = arg;
1030
1031         /*
1032          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
1033          * CAP_STD here based on ioctl handler provided by the
1034          * driver. If the driver doesn't support these
1035          * for a specific output, it must override these flags.
1036          */
1037         if (ops->vidioc_s_std)
1038                 p->capabilities |= V4L2_OUT_CAP_STD;
1039         if (ops->vidioc_s_dv_preset)
1040                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1041         if (ops->vidioc_s_dv_timings)
1042                 p->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
1043
1044         return ops->vidioc_enum_output(file, fh, p);
1045 }
1046
1047 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1048                                 struct file *file, void *fh, void *arg)
1049 {
1050         struct v4l2_fmtdesc *p = arg;
1051         struct video_device *vfd = video_devdata(file);
1052         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1053         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1054
1055         switch (p->type) {
1056         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1057                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1058                         break;
1059                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1060         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1061                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1062                         break;
1063                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1064         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1065                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1066                         break;
1067                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1068         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1069                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1070                         break;
1071                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1072         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1073                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1074                         break;
1075                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1076         }
1077         return -EINVAL;
1078 }
1079
1080 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1081                                 struct file *file, void *fh, void *arg)
1082 {
1083         struct v4l2_format *p = arg;
1084         struct video_device *vfd = video_devdata(file);
1085         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1086         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1087         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1088
1089         switch (p->type) {
1090         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1091                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1092                         break;
1093                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1094         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1095                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1096                         break;
1097                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1098         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1099                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1100                         break;
1101                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1102         case V4L2_BUF_TYPE_VBI_CAPTURE:
1103                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1104                         break;
1105                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1106         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1107                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1108                         break;
1109                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1110         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1111                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1112                         break;
1113                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1114         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1115                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1116                         break;
1117                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1118         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1119                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1120                         break;
1121                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1122         case V4L2_BUF_TYPE_VBI_OUTPUT:
1123                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1124                         break;
1125                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1126         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1127                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1128                         break;
1129                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1130         }
1131         return -EINVAL;
1132 }
1133
1134 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1135                                 struct file *file, void *fh, void *arg)
1136 {
1137         struct v4l2_format *p = arg;
1138         struct video_device *vfd = video_devdata(file);
1139         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1140         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1141         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1142
1143         switch (p->type) {
1144         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1145                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1146                         break;
1147                 CLEAR_AFTER_FIELD(p, fmt.pix);
1148                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1149         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1150                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1151                         break;
1152                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1153                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1154         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1155                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1156                         break;
1157                 CLEAR_AFTER_FIELD(p, fmt.win);
1158                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1159         case V4L2_BUF_TYPE_VBI_CAPTURE:
1160                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1161                         break;
1162                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1163                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1164         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1165                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1166                         break;
1167                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1168                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1169         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1170                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1171                         break;
1172                 CLEAR_AFTER_FIELD(p, fmt.pix);
1173                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1174         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1175                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1176                         break;
1177                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1178                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1179         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1180                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1181                         break;
1182                 CLEAR_AFTER_FIELD(p, fmt.win);
1183                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1184         case V4L2_BUF_TYPE_VBI_OUTPUT:
1185                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1186                         break;
1187                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1188                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1189         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1190                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1191                         break;
1192                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1193                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1194         }
1195         return -EINVAL;
1196 }
1197
1198 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1199                                 struct file *file, void *fh, void *arg)
1200 {
1201         struct v4l2_format *p = arg;
1202         struct video_device *vfd = video_devdata(file);
1203         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1204         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1205         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1206
1207         switch (p->type) {
1208         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1209                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1210                         break;
1211                 CLEAR_AFTER_FIELD(p, fmt.pix);
1212                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1213         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1214                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1215                         break;
1216                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1217                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1218         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1219                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1220                         break;
1221                 CLEAR_AFTER_FIELD(p, fmt.win);
1222                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1223         case V4L2_BUF_TYPE_VBI_CAPTURE:
1224                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1225                         break;
1226                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1227                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1228         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1229                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1230                         break;
1231                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1232                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1233         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1234                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1235                         break;
1236                 CLEAR_AFTER_FIELD(p, fmt.pix);
1237                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1238         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1239                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1240                         break;
1241                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1242                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1243         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1244                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1245                         break;
1246                 CLEAR_AFTER_FIELD(p, fmt.win);
1247                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1248         case V4L2_BUF_TYPE_VBI_OUTPUT:
1249                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1250                         break;
1251                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1252                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1253         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1254                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1255                         break;
1256                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1257                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1258         }
1259         return -EINVAL;
1260 }
1261
1262 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1263                                 struct file *file, void *fh, void *arg)
1264 {
1265         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1266 }
1267
1268 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1269                                 struct file *file, void *fh, void *arg)
1270 {
1271         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1272 }
1273
1274 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1275                                 struct file *file, void *fh, void *arg)
1276 {
1277         struct video_device *vfd = video_devdata(file);
1278         struct v4l2_tuner *p = arg;
1279         int err;
1280
1281         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1282                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1283         err = ops->vidioc_g_tuner(file, fh, p);
1284         if (!err)
1285                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1286         return err;
1287 }
1288
1289 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1290                                 struct file *file, void *fh, void *arg)
1291 {
1292         struct video_device *vfd = video_devdata(file);
1293         struct v4l2_tuner *p = arg;
1294
1295         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1296                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1297         return ops->vidioc_s_tuner(file, fh, p);
1298 }
1299
1300 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1301                                 struct file *file, void *fh, void *arg)
1302 {
1303         struct v4l2_modulator *p = arg;
1304         int err;
1305
1306         err = ops->vidioc_g_modulator(file, fh, p);
1307         if (!err)
1308                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1309         return err;
1310 }
1311
1312 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1313                                 struct file *file, void *fh, void *arg)
1314 {
1315         struct video_device *vfd = video_devdata(file);
1316         struct v4l2_frequency *p = arg;
1317
1318         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1319                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1320         return ops->vidioc_g_frequency(file, fh, p);
1321 }
1322
1323 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1324                                 struct file *file, void *fh, void *arg)
1325 {
1326         struct video_device *vfd = video_devdata(file);
1327         const struct v4l2_frequency *p = arg;
1328         enum v4l2_tuner_type type;
1329
1330         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1331                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1332         if (p->type != type)
1333                 return -EINVAL;
1334         return ops->vidioc_s_frequency(file, fh, p);
1335 }
1336
1337 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1338                                 struct file *file, void *fh, void *arg)
1339 {
1340         struct video_device *vfd = video_devdata(file);
1341         struct v4l2_standard *p = arg;
1342         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1343         unsigned int index = p->index, i, j = 0;
1344         const char *descr = "";
1345
1346         /* Return -ENODATA if the tvnorms for the current input
1347            or output is 0, meaning that it doesn't support this API. */
1348         if (id == 0)
1349                 return -ENODATA;
1350
1351         /* Return norm array in a canonical way */
1352         for (i = 0; i <= index && id; i++) {
1353                 /* last std value in the standards array is 0, so this
1354                    while always ends there since (id & 0) == 0. */
1355                 while ((id & standards[j].std) != standards[j].std)
1356                         j++;
1357                 curr_id = standards[j].std;
1358                 descr = standards[j].descr;
1359                 j++;
1360                 if (curr_id == 0)
1361                         break;
1362                 if (curr_id != V4L2_STD_PAL &&
1363                                 curr_id != V4L2_STD_SECAM &&
1364                                 curr_id != V4L2_STD_NTSC)
1365                         id &= ~curr_id;
1366         }
1367         if (i <= index)
1368                 return -EINVAL;
1369
1370         v4l2_video_std_construct(p, curr_id, descr);
1371         return 0;
1372 }
1373
1374 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1375                                 struct file *file, void *fh, void *arg)
1376 {
1377         struct video_device *vfd = video_devdata(file);
1378         v4l2_std_id *id = arg;
1379
1380         /* Calls the specific handler */
1381         if (ops->vidioc_g_std)
1382                 return ops->vidioc_g_std(file, fh, arg);
1383         if (vfd->current_norm) {
1384                 *id = vfd->current_norm;
1385                 return 0;
1386         }
1387         return -ENOTTY;
1388 }
1389
1390 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1391                                 struct file *file, void *fh, void *arg)
1392 {
1393         struct video_device *vfd = video_devdata(file);
1394         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1395         int ret;
1396
1397         norm = id & vfd->tvnorms;
1398         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1399                 return -EINVAL;
1400
1401         /* Calls the specific handler */
1402         ret = ops->vidioc_s_std(file, fh, norm);
1403
1404         /* Updates standard information */
1405         if (ret >= 0)
1406                 vfd->current_norm = norm;
1407         return ret;
1408 }
1409
1410 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1411                                 struct file *file, void *fh, void *arg)
1412 {
1413         struct video_device *vfd = video_devdata(file);
1414         v4l2_std_id *p = arg;
1415
1416         /*
1417          * If nothing detected, it should return all supported
1418          * standard.
1419          * Drivers just need to mask the std argument, in order
1420          * to remove the standards that don't apply from the mask.
1421          * This means that tuners, audio and video decoders can join
1422          * their efforts to improve the standards detection.
1423          */
1424         *p = vfd->tvnorms;
1425         return ops->vidioc_querystd(file, fh, arg);
1426 }
1427
1428 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1429                                 struct file *file, void *fh, void *arg)
1430 {
1431         struct video_device *vfd = video_devdata(file);
1432         struct v4l2_hw_freq_seek *p = arg;
1433         enum v4l2_tuner_type type;
1434
1435         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1436                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1437         if (p->type != type)
1438                 return -EINVAL;
1439         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1440 }
1441
1442 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1443                                 struct file *file, void *fh, void *arg)
1444 {
1445         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1446 }
1447
1448 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1449                                 struct file *file, void *fh, void *arg)
1450 {
1451         struct v4l2_requestbuffers *p = arg;
1452         int ret = check_fmt(file, p->type);
1453
1454         if (ret)
1455                 return ret;
1456
1457         CLEAR_AFTER_FIELD(p, memory);
1458
1459         return ops->vidioc_reqbufs(file, fh, p);
1460 }
1461
1462 static int v4l_querybuf(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_querybuf(file, fh, p);
1469 }
1470
1471 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1472                                 struct file *file, void *fh, void *arg)
1473 {
1474         struct v4l2_buffer *p = arg;
1475         int ret = check_fmt(file, p->type);
1476
1477         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1478 }
1479
1480 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1481                                 struct file *file, void *fh, void *arg)
1482 {
1483         struct v4l2_buffer *p = arg;
1484         int ret = check_fmt(file, p->type);
1485
1486         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1487 }
1488
1489 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1490                                 struct file *file, void *fh, void *arg)
1491 {
1492         struct v4l2_create_buffers *create = arg;
1493         int ret = check_fmt(file, create->format.type);
1494
1495         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1496 }
1497
1498 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1499                                 struct file *file, void *fh, void *arg)
1500 {
1501         struct v4l2_buffer *b = arg;
1502         int ret = check_fmt(file, b->type);
1503
1504         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1505 }
1506
1507 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1508                                 struct file *file, void *fh, void *arg)
1509 {
1510         struct video_device *vfd = video_devdata(file);
1511         struct v4l2_streamparm *p = arg;
1512         v4l2_std_id std;
1513         int ret = check_fmt(file, p->type);
1514
1515         if (ret)
1516                 return ret;
1517         if (ops->vidioc_g_parm)
1518                 return ops->vidioc_g_parm(file, fh, p);
1519         std = vfd->current_norm;
1520         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1521             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1522                 return -EINVAL;
1523         p->parm.capture.readbuffers = 2;
1524         if (ops->vidioc_g_std)
1525                 ret = ops->vidioc_g_std(file, fh, &std);
1526         if (ret == 0)
1527                 v4l2_video_std_frame_period(std,
1528                             &p->parm.capture.timeperframe);
1529         return ret;
1530 }
1531
1532 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1533                                 struct file *file, void *fh, void *arg)
1534 {
1535         struct v4l2_streamparm *p = arg;
1536         int ret = check_fmt(file, p->type);
1537
1538         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1539 }
1540
1541 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1542                                 struct file *file, void *fh, void *arg)
1543 {
1544         struct video_device *vfd = video_devdata(file);
1545         struct v4l2_queryctrl *p = arg;
1546         struct v4l2_fh *vfh =
1547                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1548
1549         if (vfh && vfh->ctrl_handler)
1550                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1551         if (vfd->ctrl_handler)
1552                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1553         if (ops->vidioc_queryctrl)
1554                 return ops->vidioc_queryctrl(file, fh, p);
1555         return -ENOTTY;
1556 }
1557
1558 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1559                                 struct file *file, void *fh, void *arg)
1560 {
1561         struct video_device *vfd = video_devdata(file);
1562         struct v4l2_querymenu *p = arg;
1563         struct v4l2_fh *vfh =
1564                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1565
1566         if (vfh && vfh->ctrl_handler)
1567                 return v4l2_querymenu(vfh->ctrl_handler, p);
1568         if (vfd->ctrl_handler)
1569                 return v4l2_querymenu(vfd->ctrl_handler, p);
1570         if (ops->vidioc_querymenu)
1571                 return ops->vidioc_querymenu(file, fh, p);
1572         return -ENOTTY;
1573 }
1574
1575 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1576                                 struct file *file, void *fh, void *arg)
1577 {
1578         struct video_device *vfd = video_devdata(file);
1579         struct v4l2_control *p = arg;
1580         struct v4l2_fh *vfh =
1581                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1582         struct v4l2_ext_controls ctrls;
1583         struct v4l2_ext_control ctrl;
1584
1585         if (vfh && vfh->ctrl_handler)
1586                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1587         if (vfd->ctrl_handler)
1588                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1589         if (ops->vidioc_g_ctrl)
1590                 return ops->vidioc_g_ctrl(file, fh, p);
1591         if (ops->vidioc_g_ext_ctrls == NULL)
1592                 return -ENOTTY;
1593
1594         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1595         ctrls.count = 1;
1596         ctrls.controls = &ctrl;
1597         ctrl.id = p->id;
1598         ctrl.value = p->value;
1599         if (check_ext_ctrls(&ctrls, 1)) {
1600                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1601
1602                 if (ret == 0)
1603                         p->value = ctrl.value;
1604                 return ret;
1605         }
1606         return -EINVAL;
1607 }
1608
1609 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1610                                 struct file *file, void *fh, void *arg)
1611 {
1612         struct video_device *vfd = video_devdata(file);
1613         struct v4l2_control *p = arg;
1614         struct v4l2_fh *vfh =
1615                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1616         struct v4l2_ext_controls ctrls;
1617         struct v4l2_ext_control ctrl;
1618
1619         if (vfh && vfh->ctrl_handler)
1620                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1621         if (vfd->ctrl_handler)
1622                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1623         if (ops->vidioc_s_ctrl)
1624                 return ops->vidioc_s_ctrl(file, fh, p);
1625         if (ops->vidioc_s_ext_ctrls == NULL)
1626                 return -ENOTTY;
1627
1628         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1629         ctrls.count = 1;
1630         ctrls.controls = &ctrl;
1631         ctrl.id = p->id;
1632         ctrl.value = p->value;
1633         if (check_ext_ctrls(&ctrls, 1))
1634                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1635         return -EINVAL;
1636 }
1637
1638 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1639                                 struct file *file, void *fh, void *arg)
1640 {
1641         struct video_device *vfd = video_devdata(file);
1642         struct v4l2_ext_controls *p = arg;
1643         struct v4l2_fh *vfh =
1644                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1645
1646         p->error_idx = p->count;
1647         if (vfh && vfh->ctrl_handler)
1648                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1649         if (vfd->ctrl_handler)
1650                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1651         if (ops->vidioc_g_ext_ctrls == NULL)
1652                 return -ENOTTY;
1653         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1654                                         -EINVAL;
1655 }
1656
1657 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1658                                 struct file *file, void *fh, void *arg)
1659 {
1660         struct video_device *vfd = video_devdata(file);
1661         struct v4l2_ext_controls *p = arg;
1662         struct v4l2_fh *vfh =
1663                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1664
1665         p->error_idx = p->count;
1666         if (vfh && vfh->ctrl_handler)
1667                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1668         if (vfd->ctrl_handler)
1669                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1670         if (ops->vidioc_s_ext_ctrls == NULL)
1671                 return -ENOTTY;
1672         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1673                                         -EINVAL;
1674 }
1675
1676 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1677                                 struct file *file, void *fh, void *arg)
1678 {
1679         struct video_device *vfd = video_devdata(file);
1680         struct v4l2_ext_controls *p = arg;
1681         struct v4l2_fh *vfh =
1682                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1683
1684         p->error_idx = p->count;
1685         if (vfh && vfh->ctrl_handler)
1686                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1687         if (vfd->ctrl_handler)
1688                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1689         if (ops->vidioc_try_ext_ctrls == NULL)
1690                 return -ENOTTY;
1691         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1692                                         -EINVAL;
1693 }
1694
1695 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1696                                 struct file *file, void *fh, void *arg)
1697 {
1698         struct v4l2_crop *p = arg;
1699         struct v4l2_selection s = {
1700                 .type = p->type,
1701         };
1702         int ret;
1703
1704         if (ops->vidioc_g_crop)
1705                 return ops->vidioc_g_crop(file, fh, p);
1706         /* simulate capture crop using selection api */
1707
1708         /* crop means compose for output devices */
1709         if (V4L2_TYPE_IS_OUTPUT(p->type))
1710                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1711         else
1712                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1713
1714         ret = ops->vidioc_g_selection(file, fh, &s);
1715
1716         /* copying results to old structure on success */
1717         if (!ret)
1718                 p->c = s.r;
1719         return ret;
1720 }
1721
1722 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1723                                 struct file *file, void *fh, void *arg)
1724 {
1725         struct v4l2_crop *p = arg;
1726         struct v4l2_selection s = {
1727                 .type = p->type,
1728                 .r = p->c,
1729         };
1730
1731         if (ops->vidioc_s_crop)
1732                 return ops->vidioc_s_crop(file, fh, p);
1733         /* simulate capture crop using selection api */
1734
1735         /* crop means compose for output devices */
1736         if (V4L2_TYPE_IS_OUTPUT(p->type))
1737                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1738         else
1739                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1740
1741         return ops->vidioc_s_selection(file, fh, &s);
1742 }
1743
1744 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1745                                 struct file *file, void *fh, void *arg)
1746 {
1747         struct v4l2_cropcap *p = arg;
1748         struct v4l2_selection s = { .type = p->type };
1749         int ret;
1750
1751         if (ops->vidioc_cropcap)
1752                 return ops->vidioc_cropcap(file, fh, p);
1753
1754         /* obtaining bounds */
1755         if (V4L2_TYPE_IS_OUTPUT(p->type))
1756                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1757         else
1758                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1759
1760         ret = ops->vidioc_g_selection(file, fh, &s);
1761         if (ret)
1762                 return ret;
1763         p->bounds = s.r;
1764
1765         /* obtaining defrect */
1766         if (V4L2_TYPE_IS_OUTPUT(p->type))
1767                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1768         else
1769                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1770
1771         ret = ops->vidioc_g_selection(file, fh, &s);
1772         if (ret)
1773                 return ret;
1774         p->defrect = s.r;
1775
1776         /* setting trivial pixelaspect */
1777         p->pixelaspect.numerator = 1;
1778         p->pixelaspect.denominator = 1;
1779         return 0;
1780 }
1781
1782 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1783                                 struct file *file, void *fh, void *arg)
1784 {
1785         struct video_device *vfd = video_devdata(file);
1786         int ret;
1787
1788         if (vfd->v4l2_dev)
1789                 pr_info("%s: =================  START STATUS  =================\n",
1790                         vfd->v4l2_dev->name);
1791         ret = ops->vidioc_log_status(file, fh);
1792         if (vfd->v4l2_dev)
1793                 pr_info("%s: ==================  END STATUS  ==================\n",
1794                         vfd->v4l2_dev->name);
1795         return ret;
1796 }
1797
1798 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1799                                 struct file *file, void *fh, void *arg)
1800 {
1801 #ifdef CONFIG_VIDEO_ADV_DEBUG
1802         struct v4l2_dbg_register *p = arg;
1803
1804         if (!capable(CAP_SYS_ADMIN))
1805                 return -EPERM;
1806         return ops->vidioc_g_register(file, fh, p);
1807 #else
1808         return -ENOTTY;
1809 #endif
1810 }
1811
1812 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1813                                 struct file *file, void *fh, void *arg)
1814 {
1815 #ifdef CONFIG_VIDEO_ADV_DEBUG
1816         const struct v4l2_dbg_register *p = arg;
1817
1818         if (!capable(CAP_SYS_ADMIN))
1819                 return -EPERM;
1820         return ops->vidioc_s_register(file, fh, p);
1821 #else
1822         return -ENOTTY;
1823 #endif
1824 }
1825
1826 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1827                                 struct file *file, void *fh, void *arg)
1828 {
1829         struct v4l2_dbg_chip_ident *p = arg;
1830
1831         p->ident = V4L2_IDENT_NONE;
1832         p->revision = 0;
1833         return ops->vidioc_g_chip_ident(file, fh, p);
1834 }
1835
1836 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1837                                 struct file *file, void *fh, void *arg)
1838 {
1839         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1840 }
1841
1842 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1843                                 struct file *file, void *fh, void *arg)
1844 {
1845         return ops->vidioc_subscribe_event(fh, arg);
1846 }
1847
1848 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1849                                 struct file *file, void *fh, void *arg)
1850 {
1851         return ops->vidioc_unsubscribe_event(fh, arg);
1852 }
1853
1854 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1855                                 struct file *file, void *fh, void *arg)
1856 {
1857         struct v4l2_sliced_vbi_cap *p = arg;
1858         int ret = check_fmt(file, p->type);
1859
1860         if (ret)
1861                 return ret;
1862
1863         /* Clear up to type, everything after type is zeroed already */
1864         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1865
1866         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1867 }
1868
1869 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1870                                 struct file *file, void *fh, void *arg)
1871 {
1872         struct video_device *vfd = video_devdata(file);
1873         struct v4l2_frequency_band *p = arg;
1874         enum v4l2_tuner_type type;
1875         int err;
1876
1877         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1878                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1879
1880         if (type != p->type)
1881                 return -EINVAL;
1882         if (ops->vidioc_enum_freq_bands)
1883                 return ops->vidioc_enum_freq_bands(file, fh, p);
1884         if (ops->vidioc_g_tuner) {
1885                 struct v4l2_tuner t = {
1886                         .index = p->tuner,
1887                         .type = type,
1888                 };
1889
1890                 if (p->index)
1891                         return -EINVAL;
1892                 err = ops->vidioc_g_tuner(file, fh, &t);
1893                 if (err)
1894                         return err;
1895                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1896                 p->rangelow = t.rangelow;
1897                 p->rangehigh = t.rangehigh;
1898                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1899                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1900                 return 0;
1901         }
1902         if (ops->vidioc_g_modulator) {
1903                 struct v4l2_modulator m = {
1904                         .index = p->tuner,
1905                 };
1906
1907                 if (type != V4L2_TUNER_RADIO)
1908                         return -EINVAL;
1909                 if (p->index)
1910                         return -EINVAL;
1911                 err = ops->vidioc_g_modulator(file, fh, &m);
1912                 if (err)
1913                         return err;
1914                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1915                 p->rangelow = m.rangelow;
1916                 p->rangehigh = m.rangehigh;
1917                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1918                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1919                 return 0;
1920         }
1921         return -ENOTTY;
1922 }
1923
1924 struct v4l2_ioctl_info {
1925         unsigned int ioctl;
1926         u32 flags;
1927         const char * const name;
1928         union {
1929                 u32 offset;
1930                 int (*func)(const struct v4l2_ioctl_ops *ops,
1931                                 struct file *file, void *fh, void *p);
1932         } u;
1933         void (*debug)(const void *arg, bool write_only);
1934 };
1935
1936 /* This control needs a priority check */
1937 #define INFO_FL_PRIO    (1 << 0)
1938 /* This control can be valid if the filehandle passes a control handler. */
1939 #define INFO_FL_CTRL    (1 << 1)
1940 /* This is a standard ioctl, no need for special code */
1941 #define INFO_FL_STD     (1 << 2)
1942 /* This is ioctl has its own function */
1943 #define INFO_FL_FUNC    (1 << 3)
1944 /* Queuing ioctl */
1945 #define INFO_FL_QUEUE   (1 << 4)
1946 /* Zero struct from after the field to the end */
1947 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1948         ((offsetof(struct v4l2_struct, field) +                 \
1949           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1950 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1951
1952 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1953         [_IOC_NR(_ioctl)] = {                                           \
1954                 .ioctl = _ioctl,                                        \
1955                 .flags = _flags | INFO_FL_STD,                          \
1956                 .name = #_ioctl,                                        \
1957                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1958                 .debug = _debug,                                        \
1959         }
1960
1961 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1962         [_IOC_NR(_ioctl)] = {                                           \
1963                 .ioctl = _ioctl,                                        \
1964                 .flags = _flags | INFO_FL_FUNC,                         \
1965                 .name = #_ioctl,                                        \
1966                 .u.func = _func,                                        \
1967                 .debug = _debug,                                        \
1968         }
1969
1970 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1971         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1972         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1973         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1974         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1975         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1976         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1977         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1978         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1979         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
1980         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1981         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
1982         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1983         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1984         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1985         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1986         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1987         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1988         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1989         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1990         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1991         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1992         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1993         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1994         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1995         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1996         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1997         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1998         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1999         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2000         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2001         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2002         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2003         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2004         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2005         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2006         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2007         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2008         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2009         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2010         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2011         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2012         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2013         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2014         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2015         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2016         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2017         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2018         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2019         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2020         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2021         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2022         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2023         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)),
2024         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2025         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2026         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2027         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2028         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2029         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2030         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2031         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2032         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2033         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2034         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2035         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2036         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2037         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2038         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2039         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
2040         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
2041         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
2042         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
2043         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2044         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2045         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2046         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2047         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2048         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2049         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2050         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2051         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2052         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2053         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2054 };
2055 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2056
2057 bool v4l2_is_known_ioctl(unsigned int cmd)
2058 {
2059         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2060                 return false;
2061         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2062 }
2063
2064 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2065 {
2066         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2067                 return vdev->lock;
2068         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2069                 return NULL;
2070         if (vdev->queue && vdev->queue->lock &&
2071                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2072                 return vdev->queue->lock;
2073         return vdev->lock;
2074 }
2075
2076 /* Common ioctl debug function. This function can be used by
2077    external ioctl messages as well as internal V4L ioctl */
2078 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2079 {
2080         const char *dir, *type;
2081
2082         if (prefix)
2083                 printk(KERN_DEBUG "%s: ", prefix);
2084
2085         switch (_IOC_TYPE(cmd)) {
2086         case 'd':
2087                 type = "v4l2_int";
2088                 break;
2089         case 'V':
2090                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2091                         type = "v4l2";
2092                         break;
2093                 }
2094                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2095                 return;
2096         default:
2097                 type = "unknown";
2098                 break;
2099         }
2100
2101         switch (_IOC_DIR(cmd)) {
2102         case _IOC_NONE:              dir = "--"; break;
2103         case _IOC_READ:              dir = "r-"; break;
2104         case _IOC_WRITE:             dir = "-w"; break;
2105         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2106         default:                     dir = "*ERR*"; break;
2107         }
2108         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2109                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2110 }
2111 EXPORT_SYMBOL(v4l_printk_ioctl);
2112
2113 static long __video_do_ioctl(struct file *file,
2114                 unsigned int cmd, void *arg)
2115 {
2116         struct video_device *vfd = video_devdata(file);
2117         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2118         bool write_only = false;
2119         struct v4l2_ioctl_info default_info;
2120         const struct v4l2_ioctl_info *info;
2121         void *fh = file->private_data;
2122         struct v4l2_fh *vfh = NULL;
2123         int use_fh_prio = 0;
2124         int debug = vfd->debug;
2125         long ret = -ENOTTY;
2126
2127         if (ops == NULL) {
2128                 pr_warn("%s: has no ioctl_ops.\n",
2129                                 video_device_node_name(vfd));
2130                 return ret;
2131         }
2132
2133         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2134                 vfh = file->private_data;
2135                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2136         }
2137
2138         if (v4l2_is_known_ioctl(cmd)) {
2139                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2140
2141                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2142                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2143                         goto done;
2144
2145                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2146                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2147                         if (ret)
2148                                 goto done;
2149                 }
2150         } else {
2151                 default_info.ioctl = cmd;
2152                 default_info.flags = 0;
2153                 default_info.debug = v4l_print_default;
2154                 info = &default_info;
2155         }
2156
2157         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2158         if (info->flags & INFO_FL_STD) {
2159                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2160                 const void *p = vfd->ioctl_ops;
2161                 const vidioc_op *vidioc = p + info->u.offset;
2162
2163                 ret = (*vidioc)(file, fh, arg);
2164         } else if (info->flags & INFO_FL_FUNC) {
2165                 ret = info->u.func(ops, file, fh, arg);
2166         } else if (!ops->vidioc_default) {
2167                 ret = -ENOTTY;
2168         } else {
2169                 ret = ops->vidioc_default(file, fh,
2170                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2171                         cmd, arg);
2172         }
2173
2174 done:
2175         if (debug) {
2176                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2177                 if (ret < 0)
2178                         pr_cont(": error %ld", ret);
2179                 if (debug == V4L2_DEBUG_IOCTL)
2180                         pr_cont("\n");
2181                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2182                         info->debug(arg, write_only);
2183                 else {
2184                         pr_cont(": ");
2185                         info->debug(arg, write_only);
2186                 }
2187         }
2188
2189         return ret;
2190 }
2191
2192 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2193                             void * __user *user_ptr, void ***kernel_ptr)
2194 {
2195         int ret = 0;
2196
2197         switch (cmd) {
2198         case VIDIOC_PREPARE_BUF:
2199         case VIDIOC_QUERYBUF:
2200         case VIDIOC_QBUF:
2201         case VIDIOC_DQBUF: {
2202                 struct v4l2_buffer *buf = parg;
2203
2204                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2205                         if (buf->length > VIDEO_MAX_PLANES) {
2206                                 ret = -EINVAL;
2207                                 break;
2208                         }
2209                         *user_ptr = (void __user *)buf->m.planes;
2210                         *kernel_ptr = (void *)&buf->m.planes;
2211                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2212                         ret = 1;
2213                 }
2214                 break;
2215         }
2216
2217         case VIDIOC_SUBDEV_G_EDID:
2218         case VIDIOC_SUBDEV_S_EDID: {
2219                 struct v4l2_subdev_edid *edid = parg;
2220
2221                 if (edid->blocks) {
2222                         if (edid->blocks > 256) {
2223                                 ret = -EINVAL;
2224                                 break;
2225                         }
2226                         *user_ptr = (void __user *)edid->edid;
2227                         *kernel_ptr = (void *)&edid->edid;
2228                         *array_size = edid->blocks * 128;
2229                         ret = 1;
2230                 }
2231                 break;
2232         }
2233
2234         case VIDIOC_S_EXT_CTRLS:
2235         case VIDIOC_G_EXT_CTRLS:
2236         case VIDIOC_TRY_EXT_CTRLS: {
2237                 struct v4l2_ext_controls *ctrls = parg;
2238
2239                 if (ctrls->count != 0) {
2240                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2241                                 ret = -EINVAL;
2242                                 break;
2243                         }
2244                         *user_ptr = (void __user *)ctrls->controls;
2245                         *kernel_ptr = (void *)&ctrls->controls;
2246                         *array_size = sizeof(struct v4l2_ext_control)
2247                                     * ctrls->count;
2248                         ret = 1;
2249                 }
2250                 break;
2251         }
2252         }
2253
2254         return ret;
2255 }
2256
2257 long
2258 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2259                v4l2_kioctl func)
2260 {
2261         char    sbuf[128];
2262         void    *mbuf = NULL;
2263         void    *parg = (void *)arg;
2264         long    err  = -EINVAL;
2265         bool    has_array_args;
2266         size_t  array_size = 0;
2267         void __user *user_ptr = NULL;
2268         void    **kernel_ptr = NULL;
2269
2270         /*  Copy arguments into temp kernel buffer  */
2271         if (_IOC_DIR(cmd) != _IOC_NONE) {
2272                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2273                         parg = sbuf;
2274                 } else {
2275                         /* too big to allocate from stack */
2276                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2277                         if (NULL == mbuf)
2278                                 return -ENOMEM;
2279                         parg = mbuf;
2280                 }
2281
2282                 err = -EFAULT;
2283                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2284                         unsigned int n = _IOC_SIZE(cmd);
2285
2286                         /*
2287                          * In some cases, only a few fields are used as input,
2288                          * i.e. when the app sets "index" and then the driver
2289                          * fills in the rest of the structure for the thing
2290                          * with that index.  We only need to copy up the first
2291                          * non-input field.
2292                          */
2293                         if (v4l2_is_known_ioctl(cmd)) {
2294                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2295                                 if (flags & INFO_FL_CLEAR_MASK)
2296                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2297                         }
2298
2299                         if (copy_from_user(parg, (void __user *)arg, n))
2300                                 goto out;
2301
2302                         /* zero out anything we don't copy from userspace */
2303                         if (n < _IOC_SIZE(cmd))
2304                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2305                 } else {
2306                         /* read-only ioctl */
2307                         memset(parg, 0, _IOC_SIZE(cmd));
2308                 }
2309         }
2310
2311         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2312         if (err < 0)
2313                 goto out;
2314         has_array_args = err;
2315
2316         if (has_array_args) {
2317                 /*
2318                  * When adding new types of array args, make sure that the
2319                  * parent argument to ioctl (which contains the pointer to the
2320                  * array) fits into sbuf (so that mbuf will still remain
2321                  * unused up to here).
2322                  */
2323                 mbuf = kmalloc(array_size, GFP_KERNEL);
2324                 err = -ENOMEM;
2325                 if (NULL == mbuf)
2326                         goto out_array_args;
2327                 err = -EFAULT;
2328                 if (copy_from_user(mbuf, user_ptr, array_size))
2329                         goto out_array_args;
2330                 *kernel_ptr = mbuf;
2331         }
2332
2333         /* Handles IOCTL */
2334         err = func(file, cmd, parg);
2335         if (err == -ENOIOCTLCMD)
2336                 err = -ENOTTY;
2337
2338         if (has_array_args) {
2339                 *kernel_ptr = user_ptr;
2340                 if (copy_to_user(user_ptr, mbuf, array_size))
2341                         err = -EFAULT;
2342                 goto out_array_args;
2343         }
2344         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2345            results that must be returned. */
2346         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2347                 goto out;
2348
2349 out_array_args:
2350         /*  Copy results into user buffer  */
2351         switch (_IOC_DIR(cmd)) {
2352         case _IOC_READ:
2353         case (_IOC_WRITE | _IOC_READ):
2354                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2355                         err = -EFAULT;
2356                 break;
2357         }
2358
2359 out:
2360         kfree(mbuf);
2361         return err;
2362 }
2363 EXPORT_SYMBOL(video_usercopy);
2364
2365 long video_ioctl2(struct file *file,
2366                unsigned int cmd, unsigned long arg)
2367 {
2368         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2369 }
2370 EXPORT_SYMBOL(video_ioctl2);