drivers/media/v4l2-core/v4l2-ioctl.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-chip-ident.h>
  30 #include <media/videobuf2-core.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 struct std_descr {
  39         v4l2_std_id std;
  40         const char *descr;
  41 };
  42
  43 static const struct std_descr standards[] = {
  44         { V4L2_STD_NTSC,        "NTSC"      },
  45         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  46         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  47         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  48         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  49         { V4L2_STD_PAL,         "PAL"       },
  50         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  51         { V4L2_STD_PAL_B,       "PAL-B"     },
  52         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  53         { V4L2_STD_PAL_G,       "PAL-G"     },
  54         { V4L2_STD_PAL_H,       "PAL-H"     },
  55         { V4L2_STD_PAL_I,       "PAL-I"     },
  56         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  57         { V4L2_STD_PAL_D,       "PAL-D"     },
  58         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  59         { V4L2_STD_PAL_K,       "PAL-K"     },
  60         { V4L2_STD_PAL_M,       "PAL-M"     },
  61         { V4L2_STD_PAL_N,       "PAL-N"     },
  62         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  63         { V4L2_STD_PAL_60,      "PAL-60"    },
  64         { V4L2_STD_SECAM,       "SECAM"     },
  65         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  66         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  67         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  68         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  69         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  70         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  71         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  72         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  73         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  74         { 0,                    "Unknown"   }
  75 };
  76
  77 /* video4linux standard ID conversion to standard name
  78  */
  79 const char *v4l2_norm_to_name(v4l2_std_id id)
  80 {
  81         u32 myid = id;
  82         int i;
  83
  84         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  85            64 bit comparations. So, on that architecture, with some gcc
  86            variants, compilation fails. Currently, the max value is 30bit wide.
  87          */
  88         BUG_ON(myid != id);
  89
  90         for (i = 0; standards[i].std; i++)
  91                 if (myid == standards[i].std)
  92                         break;
  93         return standards[i].descr;
  94 }
  95 EXPORT_SYMBOL(v4l2_norm_to_name);
  96
  97 /* Returns frame period for the given standard */
  98 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  99 {
 100         if (id & V4L2_STD_525_60) {
 101                 frameperiod->numerator = 1001;
 102                 frameperiod->denominator = 30000;
 103         } else {
 104                 frameperiod->numerator = 1;
 105                 frameperiod->denominator = 25;
 106         }
 107 }
 108 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 109
 110 /* Fill in the fields of a v4l2_standard structure according to the
 111    'id' and 'transmission' parameters.  Returns negative on error.  */
 112 int v4l2_video_std_construct(struct v4l2_standard *vs,
 113                              int id, const char *name)
 114 {
 115         vs->id = id;
 116         v4l2_video_std_frame_period(id, &vs->frameperiod);
 117         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 118         strlcpy(vs->name, name, sizeof(vs->name));
 119         return 0;
 120 }
 121 EXPORT_SYMBOL(v4l2_video_std_construct);
 122
 123 /* ----------------------------------------------------------------- */
 124 /* some arrays for pretty-printing debug messages of enum types      */
 125
 126 const char *v4l2_field_names[] = {
 127         [V4L2_FIELD_ANY]        = "any",
 128         [V4L2_FIELD_NONE]       = "none",
 129         [V4L2_FIELD_TOP]        = "top",
 130         [V4L2_FIELD_BOTTOM]     = "bottom",
 131         [V4L2_FIELD_INTERLACED] = "interlaced",
 132         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 133         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 134         [V4L2_FIELD_ALTERNATE]  = "alternate",
 135         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 136         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 137 };
 138 EXPORT_SYMBOL(v4l2_field_names);
 139
 140 const char *v4l2_type_names[] = {
 141         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 142         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 143         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 144         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 145         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 146         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 147         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 148         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 149         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 151 };
 152 EXPORT_SYMBOL(v4l2_type_names);
 153
 154 static const char *v4l2_memory_names[] = {
 155         [V4L2_MEMORY_MMAP]    = "mmap",
 156         [V4L2_MEMORY_USERPTR] = "userptr",
 157         [V4L2_MEMORY_OVERLAY] = "overlay",
 158 };
 159
 160 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 161                            arr[a] : "unknown")
 162
 163 /* ------------------------------------------------------------------ */
 164 /* debug help functions                                               */
 165
 166 static void v4l_print_querycap(const void *arg, bool write_only)
 167 {
 168         const struct v4l2_capability *p = arg;
 169
 170         pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, "
 171                 "capabilities=0x%08x, device_caps=0x%08x\n",
 172                 p->driver, p->card, p->bus_info,
 173                 p->version, p->capabilities, p->device_caps);
 174 }
 175
 176 static void v4l_print_enuminput(const void *arg, bool write_only)
 177 {
 178         const struct v4l2_input *p = arg;
 179
 180         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, "
 181                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 182                 p->index, p->name, p->type, p->audioset, p->tuner,
 183                 (unsigned long long)p->std, p->status, p->capabilities);
 184 }
 185
 186 static void v4l_print_enumoutput(const void *arg, bool write_only)
 187 {
 188         const struct v4l2_output *p = arg;
 189
 190         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, "
 191                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 192                 p->index, p->name, p->type, p->audioset, p->modulator,
 193                 (unsigned long long)p->std, p->capabilities);
 194 }
 195
 196 static void v4l_print_audio(const void *arg, bool write_only)
 197 {
 198         const struct v4l2_audio *p = arg;
 199
 200         if (write_only)
 201                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 202         else
 203                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
 204                         p->index, p->name, p->capability, p->mode);
 205 }
 206
 207 static void v4l_print_audioout(const void *arg, bool write_only)
 208 {
 209         const struct v4l2_audioout *p = arg;
 210
 211         if (write_only)
 212                 pr_cont("index=%u\n", p->index);
 213         else
 214                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
 215                         p->index, p->name, p->capability, p->mode);
 216 }
 217
 218 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 219 {
 220         const struct v4l2_fmtdesc *p = arg;
 221
 222         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n",
 223                 p->index, prt_names(p->type, v4l2_type_names),
 224                 p->flags, (p->pixelformat & 0xff),
 225                 (p->pixelformat >>  8) & 0xff,
 226                 (p->pixelformat >> 16) & 0xff,
 227                 (p->pixelformat >> 24) & 0xff,
 228                 p->description);
 229 }
 230
 231 static void v4l_print_format(const void *arg, bool write_only)
 232 {
 233         const struct v4l2_format *p = arg;
 234         const struct v4l2_pix_format *pix;
 235         const struct v4l2_pix_format_mplane *mp;
 236         const struct v4l2_vbi_format *vbi;
 237         const struct v4l2_sliced_vbi_format *sliced;
 238         const struct v4l2_window *win;
 239         const struct v4l2_clip *clip;
 240         unsigned i;
 241
 242         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 243         switch (p->type) {
 244         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 245         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 246                 pix = &p->fmt.pix;
 247                 pr_cont(", width=%u, height=%u, "
 248                         "pixelformat=%c%c%c%c, field=%s, "
 249                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 250                         pix->width, pix->height,
 251                         (pix->pixelformat & 0xff),
 252                         (pix->pixelformat >>  8) & 0xff,
 253                         (pix->pixelformat >> 16) & 0xff,
 254                         (pix->pixelformat >> 24) & 0xff,
 255                         prt_names(pix->field, v4l2_field_names),
 256                         pix->bytesperline, pix->sizeimage,
 257                         pix->colorspace);
 258                 break;
 259         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 260         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 261                 mp = &p->fmt.pix_mp;
 262                 pr_cont(", width=%u, height=%u, "
 263                         "format=%c%c%c%c, field=%s, "
 264                         "colorspace=%d, num_planes=%u\n",
 265                         mp->width, mp->height,
 266                         (mp->pixelformat & 0xff),
 267                         (mp->pixelformat >>  8) & 0xff,
 268                         (mp->pixelformat >> 16) & 0xff,
 269                         (mp->pixelformat >> 24) & 0xff,
 270                         prt_names(mp->field, v4l2_field_names),
 271                         mp->colorspace, mp->num_planes);
 272                 for (i = 0; i < mp->num_planes; i++)
 273                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 274                                         mp->plane_fmt[i].bytesperline,
 275                                         mp->plane_fmt[i].sizeimage);
 276                 break;
 277         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 278         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 279                 win = &p->fmt.win;
 280                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 281                         "chromakey=0x%08x, bitmap=%p, "
 282                         "global_alpha=0x%02x\n",
 283                         win->w.width, win->w.height,
 284                         win->w.left, win->w.top,
 285                         prt_names(win->field, v4l2_field_names),
 286                         win->chromakey, win->bitmap, win->global_alpha);
 287                 clip = win->clips;
 288                 for (i = 0; i < win->clipcount; i++) {
 289                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 290                                         i, clip->c.width, clip->c.height,
 291                                         clip->c.left, clip->c.top);
 292                         clip = clip->next;
 293                 }
 294                 break;
 295         case V4L2_BUF_TYPE_VBI_CAPTURE:
 296         case V4L2_BUF_TYPE_VBI_OUTPUT:
 297                 vbi = &p->fmt.vbi;
 298                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 299                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 300                         vbi->sampling_rate, vbi->offset,
 301                         vbi->samples_per_line,
 302                         (vbi->sample_format & 0xff),
 303                         (vbi->sample_format >>  8) & 0xff,
 304                         (vbi->sample_format >> 16) & 0xff,
 305                         (vbi->sample_format >> 24) & 0xff,
 306                         vbi->start[0], vbi->start[1],
 307                         vbi->count[0], vbi->count[1]);
 308                 break;
 309         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 310         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 311                 sliced = &p->fmt.sliced;
 312                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 313                                 sliced->service_set, sliced->io_size);
 314                 for (i = 0; i < 24; i++)
 315                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 316                                 sliced->service_lines[0][i],
 317                                 sliced->service_lines[1][i]);
 318                 break;
 319         }
 320 }
 321
 322 static void v4l_print_framebuffer(const void *arg, bool write_only)
 323 {
 324         const struct v4l2_framebuffer *p = arg;
 325
 326         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 327                 "height=%u, pixelformat=%c%c%c%c, "
 328                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 329                         p->capability, p->flags, p->base,
 330                         p->fmt.width, p->fmt.height,
 331                         (p->fmt.pixelformat & 0xff),
 332                         (p->fmt.pixelformat >>  8) & 0xff,
 333                         (p->fmt.pixelformat >> 16) & 0xff,
 334                         (p->fmt.pixelformat >> 24) & 0xff,
 335                         p->fmt.bytesperline, p->fmt.sizeimage,
 336                         p->fmt.colorspace);
 337 }
 338
 339 static void v4l_print_buftype(const void *arg, bool write_only)
 340 {
 341         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 342 }
 343
 344 static void v4l_print_modulator(const void *arg, bool write_only)
 345 {
 346         const struct v4l2_modulator *p = arg;
 347
 348         if (write_only)
 349                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 350         else
 351                 pr_cont("index=%u, name=%s, capability=0x%x, "
 352                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 353                         p->index, p->name, p->capability,
 354                         p->rangelow, p->rangehigh, p->txsubchans);
 355 }
 356
 357 static void v4l_print_tuner(const void *arg, bool write_only)
 358 {
 359         const struct v4l2_tuner *p = arg;
 360
 361         if (write_only)
 362                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 363         else
 364                 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, "
 365                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 366                         "rxsubchans=0x%x, audmode=%u\n",
 367                         p->index, p->name, p->type,
 368                         p->capability, p->rangelow,
 369                         p->rangehigh, p->signal, p->afc,
 370                         p->rxsubchans, p->audmode);
 371 }
 372
 373 static void v4l_print_frequency(const void *arg, bool write_only)
 374 {
 375         const struct v4l2_frequency *p = arg;
 376
 377         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 378                                 p->tuner, p->type, p->frequency);
 379 }
 380
 381 static void v4l_print_standard(const void *arg, bool write_only)
 382 {
 383         const struct v4l2_standard *p = arg;
 384
 385         pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, "
 386                 "framelines=%u\n", p->index,
 387                 (unsigned long long)p->id, p->name,
 388                 p->frameperiod.numerator,
 389                 p->frameperiod.denominator,
 390                 p->framelines);
 391 }
 392
 393 static void v4l_print_std(const void *arg, bool write_only)
 394 {
 395         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 396 }
 397
 398 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 399 {
 400         const struct v4l2_hw_freq_seek *p = arg;
 401
 402         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 403                 "rangelow=%u, rangehigh=%u\n",
 404                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 405                 p->rangelow, p->rangehigh);
 406 }
 407
 408 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 409 {
 410         const struct v4l2_requestbuffers *p = arg;
 411
 412         pr_cont("count=%d, type=%s, memory=%s\n",
 413                 p->count,
 414                 prt_names(p->type, v4l2_type_names),
 415                 prt_names(p->memory, v4l2_memory_names));
 416 }
 417
 418 static void v4l_print_buffer(const void *arg, bool write_only)
 419 {
 420         const struct v4l2_buffer *p = arg;
 421         const struct v4l2_timecode *tc = &p->timecode;
 422         const struct v4l2_plane *plane;
 423         int i;
 424
 425         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 426                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 427                         p->timestamp.tv_sec / 3600,
 428                         (int)(p->timestamp.tv_sec / 60) % 60,
 429                         (int)(p->timestamp.tv_sec % 60),
 430                         (long)p->timestamp.tv_usec,
 431                         p->index,
 432                         prt_names(p->type, v4l2_type_names),
 433                         p->flags, prt_names(p->field, v4l2_field_names),
 434                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 435
 436         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 437                 pr_cont("\n");
 438                 for (i = 0; i < p->length; ++i) {
 439                         plane = &p->m.planes[i];
 440                         printk(KERN_DEBUG
 441                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 442                                 "offset/userptr=0x%lx, length=%d\n",
 443                                 i, plane->bytesused, plane->data_offset,
 444                                 plane->m.userptr, plane->length);
 445                 }
 446         } else {
 447                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 448                         p->bytesused, p->m.userptr, p->length);
 449         }
 450
 451         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 452                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 453                         tc->hours, tc->minutes, tc->seconds,
 454                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 455 }
 456
 457 static void v4l_print_create_buffers(const void *arg, bool write_only)
 458 {
 459         const struct v4l2_create_buffers *p = arg;
 460
 461         pr_cont("index=%d, count=%d, memory=%s, ",
 462                         p->index, p->count,
 463                         prt_names(p->memory, v4l2_memory_names));
 464         v4l_print_format(&p->format, write_only);
 465 }
 466
 467 static void v4l_print_streamparm(const void *arg, bool write_only)
 468 {
 469         const struct v4l2_streamparm *p = arg;
 470
 471         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 472
 473         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 474             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 475                 const struct v4l2_captureparm *c = &p->parm.capture;
 476
 477                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 478                         "extendedmode=%d, readbuffers=%d\n",
 479                         c->capability, c->capturemode,
 480                         c->timeperframe.numerator, c->timeperframe.denominator,
 481                         c->extendedmode, c->readbuffers);
 482         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 483                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 484                 const struct v4l2_outputparm *c = &p->parm.output;
 485
 486                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 487                         "extendedmode=%d, writebuffers=%d\n",
 488                         c->capability, c->outputmode,
 489                         c->timeperframe.numerator, c->timeperframe.denominator,
 490                         c->extendedmode, c->writebuffers);
 491         }
 492 }
 493
 494 static void v4l_print_queryctrl(const void *arg, bool write_only)
 495 {
 496         const struct v4l2_queryctrl *p = arg;
 497
 498         pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, "
 499                 "step=%d, default=%d, flags=0x%08x\n",
 500                         p->id, p->type, p->name,
 501                         p->minimum, p->maximum,
 502                         p->step, p->default_value, p->flags);
 503 }
 504
 505 static void v4l_print_querymenu(const void *arg, bool write_only)
 506 {
 507         const struct v4l2_querymenu *p = arg;
 508
 509         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 510 }
 511
 512 static void v4l_print_control(const void *arg, bool write_only)
 513 {
 514         const struct v4l2_control *p = arg;
 515
 516         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 517 }
 518
 519 static void v4l_print_ext_controls(const void *arg, bool write_only)
 520 {
 521         const struct v4l2_ext_controls *p = arg;
 522         int i;
 523
 524         pr_cont("class=0x%x, count=%d, error_idx=%d",
 525                         p->ctrl_class, p->count, p->error_idx);
 526         for (i = 0; i < p->count; i++) {
 527                 if (p->controls[i].size)
 528                         pr_cont(", id/val=0x%x/0x%x",
 529                                 p->controls[i].id, p->controls[i].value);
 530                 else
 531                         pr_cont(", id/size=0x%x/%u",
 532                                 p->controls[i].id, p->controls[i].size);
 533         }
 534         pr_cont("\n");
 535 }
 536
 537 static void v4l_print_cropcap(const void *arg, bool write_only)
 538 {
 539         const struct v4l2_cropcap *p = arg;
 540
 541         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 542                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 543                 "pixelaspect %d/%d\n",
 544                 prt_names(p->type, v4l2_type_names),
 545                 p->bounds.width, p->bounds.height,
 546                 p->bounds.left, p->bounds.top,
 547                 p->defrect.width, p->defrect.height,
 548                 p->defrect.left, p->defrect.top,
 549                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 550 }
 551
 552 static void v4l_print_crop(const void *arg, bool write_only)
 553 {
 554         const struct v4l2_crop *p = arg;
 555
 556         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 557                 prt_names(p->type, v4l2_type_names),
 558                 p->c.width, p->c.height,
 559                 p->c.left, p->c.top);
 560 }
 561
 562 static void v4l_print_selection(const void *arg, bool write_only)
 563 {
 564         const struct v4l2_selection *p = arg;
 565
 566         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 567                 prt_names(p->type, v4l2_type_names),
 568                 p->target, p->flags,
 569                 p->r.width, p->r.height, p->r.left, p->r.top);
 570 }
 571
 572 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 573 {
 574         const struct v4l2_jpegcompression *p = arg;
 575
 576         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 577                 "COM_len=%d, jpeg_markers=0x%x\n",
 578                 p->quality, p->APPn, p->APP_len,
 579                 p->COM_len, p->jpeg_markers);
 580 }
 581
 582 static void v4l_print_enc_idx(const void *arg, bool write_only)
 583 {
 584         const struct v4l2_enc_idx *p = arg;
 585
 586         pr_cont("entries=%d, entries_cap=%d\n",
 587                         p->entries, p->entries_cap);
 588 }
 589
 590 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 591 {
 592         const struct v4l2_encoder_cmd *p = arg;
 593
 594         pr_cont("cmd=%d, flags=0x%x\n",
 595                         p->cmd, p->flags);
 596 }
 597
 598 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 599 {
 600         const struct v4l2_decoder_cmd *p = arg;
 601
 602         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 603
 604         if (p->cmd == V4L2_DEC_CMD_START)
 605                 pr_info("speed=%d, format=%u\n",
 606                                 p->start.speed, p->start.format);
 607         else if (p->cmd == V4L2_DEC_CMD_STOP)
 608                 pr_info("pts=%llu\n", p->stop.pts);
 609 }
 610
 611 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_dbg_chip_ident *p = arg;
 614
 615         pr_cont("type=%u, ", p->match.type);
 616         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 617                 pr_cont("name=%s, ", p->match.name);
 618         else
 619                 pr_cont("addr=%u, ", p->match.addr);
 620         pr_cont("chip_ident=%u, revision=0x%x\n",
 621                         p->ident, p->revision);
 622 }
 623
 624 static void v4l_print_dbg_register(const void *arg, bool write_only)
 625 {
 626         const struct v4l2_dbg_register *p = arg;
 627
 628         pr_cont("type=%u, ", p->match.type);
 629         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 630                 pr_cont("name=%s, ", p->match.name);
 631         else
 632                 pr_cont("addr=%u, ", p->match.addr);
 633         pr_cont("reg=0x%llx, val=0x%llx\n",
 634                         p->reg, p->val);
 635 }
 636
 637 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
 638 {
 639         const struct v4l2_dv_enum_preset *p = arg;
 640
 641         pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n",
 642                         p->index, p->preset, p->name, p->width, p->height);
 643 }
 644
 645 static void v4l_print_dv_preset(const void *arg, bool write_only)
 646 {
 647         const struct v4l2_dv_preset *p = arg;
 648
 649         pr_cont("preset=%u\n", p->preset);
 650 }
 651
 652 static void v4l_print_dv_timings(const void *arg, bool write_only)
 653 {
 654         const struct v4l2_dv_timings *p = arg;
 655
 656         switch (p->type) {
 657         case V4L2_DV_BT_656_1120:
 658                 pr_cont("type=bt-656/1120, interlaced=%u, "
 659                         "pixelclock=%llu, "
 660                         "width=%u, height=%u, polarities=0x%x, "
 661                         "hfrontporch=%u, hsync=%u, "
 662                         "hbackporch=%u, vfrontporch=%u, "
 663                         "vsync=%u, vbackporch=%u, "
 664                         "il_vfrontporch=%u, il_vsync=%u, "
 665                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 666                                 p->bt.interlaced, p->bt.pixelclock,
 667                                 p->bt.width, p->bt.height,
 668                                 p->bt.polarities, p->bt.hfrontporch,
 669                                 p->bt.hsync, p->bt.hbackporch,
 670                                 p->bt.vfrontporch, p->bt.vsync,
 671                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 672                                 p->bt.il_vsync, p->bt.il_vbackporch,
 673                                 p->bt.standards, p->bt.flags);
 674                 break;
 675         default:
 676                 pr_cont("type=%d\n", p->type);
 677                 break;
 678         }
 679 }
 680
 681 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 682 {
 683         const struct v4l2_enum_dv_timings *p = arg;
 684
 685         pr_cont("index=%u, ", p->index);
 686         v4l_print_dv_timings(&p->timings, write_only);
 687 }
 688
 689 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 690 {
 691         const struct v4l2_dv_timings_cap *p = arg;
 692
 693         switch (p->type) {
 694         case V4L2_DV_BT_656_1120:
 695                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 696                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 697                         p->bt.min_width, p->bt.max_width,
 698                         p->bt.min_height, p->bt.max_height,
 699                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 700                         p->bt.standards, p->bt.capabilities);
 701                 break;
 702         default:
 703                 pr_cont("type=%u\n", p->type);
 704                 break;
 705         }
 706 }
 707
 708 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_frmsizeenum *p = arg;
 711
 712         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 713                         p->index,
 714                         (p->pixel_format & 0xff),
 715                         (p->pixel_format >>  8) & 0xff,
 716                         (p->pixel_format >> 16) & 0xff,
 717                         (p->pixel_format >> 24) & 0xff,
 718                         p->type);
 719         switch (p->type) {
 720         case V4L2_FRMSIZE_TYPE_DISCRETE:
 721                 pr_cont(" wxh=%ux%u\n",
 722                         p->discrete.width, p->discrete.height);
 723                 break;
 724         case V4L2_FRMSIZE_TYPE_STEPWISE:
 725                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 726                                 p->stepwise.min_width,  p->stepwise.min_height,
 727                                 p->stepwise.step_width, p->stepwise.step_height,
 728                                 p->stepwise.max_width,  p->stepwise.max_height);
 729                 break;
 730         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 731                 /* fall through */
 732         default:
 733                 pr_cont("\n");
 734                 break;
 735         }
 736 }
 737
 738 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 739 {
 740         const struct v4l2_frmivalenum *p = arg;
 741
 742         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 743                         p->index,
 744                         (p->pixel_format & 0xff),
 745                         (p->pixel_format >>  8) & 0xff,
 746                         (p->pixel_format >> 16) & 0xff,
 747                         (p->pixel_format >> 24) & 0xff,
 748                         p->width, p->height, p->type);
 749         switch (p->type) {
 750         case V4L2_FRMIVAL_TYPE_DISCRETE:
 751                 pr_cont(" fps=%d/%d\n",
 752                                 p->discrete.numerator,
 753                                 p->discrete.denominator);
 754                 break;
 755         case V4L2_FRMIVAL_TYPE_STEPWISE:
 756                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 757                                 p->stepwise.min.numerator,
 758                                 p->stepwise.min.denominator,
 759                                 p->stepwise.max.numerator,
 760                                 p->stepwise.max.denominator,
 761                                 p->stepwise.step.numerator,
 762                                 p->stepwise.step.denominator);
 763                 break;
 764         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 765                 /* fall through */
 766         default:
 767                 pr_cont("\n");
 768                 break;
 769         }
 770 }
 771
 772 static void v4l_print_event(const void *arg, bool write_only)
 773 {
 774         const struct v4l2_event *p = arg;
 775         const struct v4l2_event_ctrl *c;
 776
 777         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 778                 "timestamp=%lu.%9.9lu\n",
 779                         p->type, p->pending, p->sequence, p->id,
 780                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 781         switch (p->type) {
 782         case V4L2_EVENT_VSYNC:
 783                 printk(KERN_DEBUG "field=%s\n",
 784                         prt_names(p->u.vsync.field, v4l2_field_names));
 785                 break;
 786         case V4L2_EVENT_CTRL:
 787                 c = &p->u.ctrl;
 788                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 789                         c->changes, c->type);
 790                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 791                         pr_cont("value64=%lld, ", c->value64);
 792                 else
 793                         pr_cont("value=%d, ", c->value);
 794                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 795                                 " default_value=%d\n",
 796                         c->flags, c->minimum, c->maximum,
 797                         c->step, c->default_value);
 798                 break;
 799         case V4L2_EVENT_FRAME_SYNC:
 800                 pr_cont("frame_sequence=%u\n",
 801                         p->u.frame_sync.frame_sequence);
 802                 break;
 803         }
 804 }
 805
 806 static void v4l_print_event_subscription(const void *arg, bool write_only)
 807 {
 808         const struct v4l2_event_subscription *p = arg;
 809
 810         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 811                         p->type, p->id, p->flags);
 812 }
 813
 814 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 815 {
 816         const struct v4l2_sliced_vbi_cap *p = arg;
 817         int i;
 818
 819         pr_cont("type=%s, service_set=0x%08x\n",
 820                         prt_names(p->type, v4l2_type_names), p->service_set);
 821         for (i = 0; i < 24; i++)
 822                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 823                                 p->service_lines[0][i],
 824                                 p->service_lines[1][i]);
 825 }
 826
 827 static void v4l_print_freq_band(const void *arg, bool write_only)
 828 {
 829         const struct v4l2_frequency_band *p = arg;
 830
 831         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 832                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 833                         p->tuner, p->type, p->index,
 834                         p->capability, p->rangelow,
 835                         p->rangehigh, p->modulation);
 836 }
 837
 838 static void v4l_print_u32(const void *arg, bool write_only)
 839 {
 840         pr_cont("value=%u\n", *(const u32 *)arg);
 841 }
 842
 843 static void v4l_print_newline(const void *arg, bool write_only)
 844 {
 845         pr_cont("\n");
 846 }
 847
 848 static void v4l_print_default(const void *arg, bool write_only)
 849 {
 850         pr_cont("driver-specific ioctl\n");
 851 }
 852
 853 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 854 {
 855         __u32 i;
 856
 857         /* zero the reserved fields */
 858         c->reserved[0] = c->reserved[1] = 0;
 859         for (i = 0; i < c->count; i++)
 860                 c->controls[i].reserved2[0] = 0;
 861
 862         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 863            when using extended controls.
 864            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 865            is it allowed for backwards compatibility.
 866          */
 867         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 868                 return 0;
 869         /* Check that all controls are from the same control class. */
 870         for (i = 0; i < c->count; i++) {
 871                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 872                         c->error_idx = i;
 873                         return 0;
 874                 }
 875         }
 876         return 1;
 877 }
 878
 879 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 880 {
 881         struct video_device *vfd = video_devdata(file);
 882         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 883         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 884         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 885         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 886         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 887
 888         if (ops == NULL)
 889                 return -EINVAL;
 890
 891         switch (type) {
 892         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 893                 if (is_vid && is_rx &&
 894                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 895                         return 0;
 896                 break;
 897         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 898                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 899                         return 0;
 900                 break;
 901         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 902                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 903                         return 0;
 904                 break;
 905         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 906                 if (is_vid && is_tx &&
 907                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 908                         return 0;
 909                 break;
 910         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 911                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 912                         return 0;
 913                 break;
 914         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 915                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 916                         return 0;
 917                 break;
 918         case V4L2_BUF_TYPE_VBI_CAPTURE:
 919                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 920                         return 0;
 921                 break;
 922         case V4L2_BUF_TYPE_VBI_OUTPUT:
 923                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 924                         return 0;
 925                 break;
 926         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 927                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 928                         return 0;
 929                 break;
 930         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 931                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 932                         return 0;
 933                 break;
 934         default:
 935                 break;
 936         }
 937         return -EINVAL;
 938 }
 939
 940 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 941                                 struct file *file, void *fh, void *arg)
 942 {
 943         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 944
 945         cap->version = LINUX_VERSION_CODE;
 946         return ops->vidioc_querycap(file, fh, cap);
 947 }
 948
 949 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 950                                 struct file *file, void *fh, void *arg)
 951 {
 952         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 953 }
 954
 955 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 956                                 struct file *file, void *fh, void *arg)
 957 {
 958         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 959 }
 960
 961 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 962                                 struct file *file, void *fh, void *arg)
 963 {
 964         struct video_device *vfd;
 965         u32 *p = arg;
 966
 967         if (ops->vidioc_g_priority)
 968                 return ops->vidioc_g_priority(file, fh, arg);
 969         vfd = video_devdata(file);
 970         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 971         return 0;
 972 }
 973
 974 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 975                                 struct file *file, void *fh, void *arg)
 976 {
 977         struct video_device *vfd;
 978         struct v4l2_fh *vfh;
 979         u32 *p = arg;
 980
 981         if (ops->vidioc_s_priority)
 982                 return ops->vidioc_s_priority(file, fh, *p);
 983         vfd = video_devdata(file);
 984         vfh = file->private_data;
 985         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
 986 }
 987
 988 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
 989                                 struct file *file, void *fh, void *arg)
 990 {
 991         struct v4l2_input *p = arg;
 992
 993         /*
 994          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
 995          * CAP_STD here based on ioctl handler provided by the
 996          * driver. If the driver doesn't support these
 997          * for a specific input, it must override these flags.
 998          */
 999         if (ops->vidioc_s_std)
1000                 p->capabilities |= V4L2_IN_CAP_STD;
1001         if (ops->vidioc_s_dv_preset)
1002                 p->capabilities |= V4L2_IN_CAP_PRESETS;
1003         if (ops->vidioc_s_dv_timings)
1004                 p->capabilities |= V4L2_IN_CAP_DV_TIMINGS;
1005
1006         return ops->vidioc_enum_input(file, fh, p);
1007 }
1008
1009 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1010                                 struct file *file, void *fh, void *arg)
1011 {
1012         struct v4l2_output *p = arg;
1013
1014         /*
1015          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
1016          * CAP_STD here based on ioctl handler provided by the
1017          * driver. If the driver doesn't support these
1018          * for a specific output, it must override these flags.
1019          */
1020         if (ops->vidioc_s_std)
1021                 p->capabilities |= V4L2_OUT_CAP_STD;
1022         if (ops->vidioc_s_dv_preset)
1023                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1024         if (ops->vidioc_s_dv_timings)
1025                 p->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
1026
1027         return ops->vidioc_enum_output(file, fh, p);
1028 }
1029
1030 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1031                                 struct file *file, void *fh, void *arg)
1032 {
1033         struct v4l2_fmtdesc *p = arg;
1034         struct video_device *vfd = video_devdata(file);
1035         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1036         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1037
1038         switch (p->type) {
1039         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1040                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1041                         break;
1042                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1043         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1044                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1045                         break;
1046                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1047         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1048                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1049                         break;
1050                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1051         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1052                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1053                         break;
1054                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1055         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1056                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1057                         break;
1058                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1059         }
1060         return -EINVAL;
1061 }
1062
1063 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1064                                 struct file *file, void *fh, void *arg)
1065 {
1066         struct v4l2_format *p = arg;
1067         struct video_device *vfd = video_devdata(file);
1068         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1069         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1070         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1071
1072         switch (p->type) {
1073         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1074                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1075                         break;
1076                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1077         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1078                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1079                         break;
1080                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1081         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1082                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1083                         break;
1084                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1085         case V4L2_BUF_TYPE_VBI_CAPTURE:
1086                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1087                         break;
1088                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1089         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1090                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1091                         break;
1092                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1093         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1094                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1095                         break;
1096                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1097         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1098                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1099                         break;
1100                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1101         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1102                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1103                         break;
1104                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1105         case V4L2_BUF_TYPE_VBI_OUTPUT:
1106                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1107                         break;
1108                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1109         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1110                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1111                         break;
1112                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1113         }
1114         return -EINVAL;
1115 }
1116
1117 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1118                                 struct file *file, void *fh, void *arg)
1119 {
1120         struct v4l2_format *p = arg;
1121         struct video_device *vfd = video_devdata(file);
1122         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1123         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1124         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1125
1126         switch (p->type) {
1127         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1128                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1129                         break;
1130                 CLEAR_AFTER_FIELD(p, fmt.pix);
1131                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1132         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1133                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1134                         break;
1135                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1136                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1137         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1138                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1139                         break;
1140                 CLEAR_AFTER_FIELD(p, fmt.win);
1141                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1142         case V4L2_BUF_TYPE_VBI_CAPTURE:
1143                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1144                         break;
1145                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1146                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1147         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1148                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1149                         break;
1150                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1151                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1152         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1153                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1154                         break;
1155                 CLEAR_AFTER_FIELD(p, fmt.pix);
1156                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1157         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1158                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1159                         break;
1160                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1161                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1162         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1163                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1164                         break;
1165                 CLEAR_AFTER_FIELD(p, fmt.win);
1166                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1167         case V4L2_BUF_TYPE_VBI_OUTPUT:
1168                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1169                         break;
1170                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1171                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1172         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1173                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1174                         break;
1175                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1176                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1177         }
1178         return -EINVAL;
1179 }
1180
1181 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1182                                 struct file *file, void *fh, void *arg)
1183 {
1184         struct v4l2_format *p = arg;
1185         struct video_device *vfd = video_devdata(file);
1186         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1187         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1188         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1189
1190         switch (p->type) {
1191         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1192                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1193                         break;
1194                 CLEAR_AFTER_FIELD(p, fmt.pix);
1195                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1196         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1197                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1198                         break;
1199                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1200                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1201         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1202                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1203                         break;
1204                 CLEAR_AFTER_FIELD(p, fmt.win);
1205                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1206         case V4L2_BUF_TYPE_VBI_CAPTURE:
1207                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1208                         break;
1209                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1210                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1211         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1212                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1213                         break;
1214                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1215                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1216         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1217                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1218                         break;
1219                 CLEAR_AFTER_FIELD(p, fmt.pix);
1220                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1221         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1222                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1223                         break;
1224                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1225                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1226         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1227                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1228                         break;
1229                 CLEAR_AFTER_FIELD(p, fmt.win);
1230                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1231         case V4L2_BUF_TYPE_VBI_OUTPUT:
1232                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1233                         break;
1234                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1235                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1236         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1237                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1238                         break;
1239                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1240                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1241         }
1242         return -EINVAL;
1243 }
1244
1245 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1246                                 struct file *file, void *fh, void *arg)
1247 {
1248         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1249 }
1250
1251 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1252                                 struct file *file, void *fh, void *arg)
1253 {
1254         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1255 }
1256
1257 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1258                                 struct file *file, void *fh, void *arg)
1259 {
1260         struct video_device *vfd = video_devdata(file);
1261         struct v4l2_tuner *p = arg;
1262         int err;
1263
1264         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1265                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1266         err = ops->vidioc_g_tuner(file, fh, p);
1267         if (!err)
1268                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1269         return err;
1270 }
1271
1272 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1273                                 struct file *file, void *fh, void *arg)
1274 {
1275         struct video_device *vfd = video_devdata(file);
1276         struct v4l2_tuner *p = arg;
1277
1278         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1279                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1280         return ops->vidioc_s_tuner(file, fh, p);
1281 }
1282
1283 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1284                                 struct file *file, void *fh, void *arg)
1285 {
1286         struct v4l2_modulator *p = arg;
1287         int err;
1288
1289         err = ops->vidioc_g_modulator(file, fh, p);
1290         if (!err)
1291                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1292         return err;
1293 }
1294
1295 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1296                                 struct file *file, void *fh, void *arg)
1297 {
1298         struct video_device *vfd = video_devdata(file);
1299         struct v4l2_frequency *p = arg;
1300
1301         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1302                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1303         return ops->vidioc_g_frequency(file, fh, p);
1304 }
1305
1306 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1307                                 struct file *file, void *fh, void *arg)
1308 {
1309         struct video_device *vfd = video_devdata(file);
1310         struct v4l2_frequency *p = arg;
1311         enum v4l2_tuner_type type;
1312
1313         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1314                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1315         if (p->type != type)
1316                 return -EINVAL;
1317         return ops->vidioc_s_frequency(file, fh, p);
1318 }
1319
1320 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1321                                 struct file *file, void *fh, void *arg)
1322 {
1323         struct video_device *vfd = video_devdata(file);
1324         struct v4l2_standard *p = arg;
1325         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1326         unsigned int index = p->index, i, j = 0;
1327         const char *descr = "";
1328
1329         /* Return -ENODATA if the tvnorms for the current input
1330            or output is 0, meaning that it doesn't support this API. */
1331         if (id == 0)
1332                 return -ENODATA;
1333
1334         /* Return norm array in a canonical way */
1335         for (i = 0; i <= index && id; i++) {
1336                 /* last std value in the standards array is 0, so this
1337                    while always ends there since (id & 0) == 0. */
1338                 while ((id & standards[j].std) != standards[j].std)
1339                         j++;
1340                 curr_id = standards[j].std;
1341                 descr = standards[j].descr;
1342                 j++;
1343                 if (curr_id == 0)
1344                         break;
1345                 if (curr_id != V4L2_STD_PAL &&
1346                                 curr_id != V4L2_STD_SECAM &&
1347                                 curr_id != V4L2_STD_NTSC)
1348                         id &= ~curr_id;
1349         }
1350         if (i <= index)
1351                 return -EINVAL;
1352
1353         v4l2_video_std_construct(p, curr_id, descr);
1354         return 0;
1355 }
1356
1357 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1358                                 struct file *file, void *fh, void *arg)
1359 {
1360         struct video_device *vfd = video_devdata(file);
1361         v4l2_std_id *id = arg;
1362
1363         /* Calls the specific handler */
1364         if (ops->vidioc_g_std)
1365                 return ops->vidioc_g_std(file, fh, arg);
1366         if (vfd->current_norm) {
1367                 *id = vfd->current_norm;
1368                 return 0;
1369         }
1370         return -ENOTTY;
1371 }
1372
1373 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1374                                 struct file *file, void *fh, void *arg)
1375 {
1376         struct video_device *vfd = video_devdata(file);
1377         v4l2_std_id *id = arg, norm;
1378         int ret;
1379
1380         norm = (*id) & vfd->tvnorms;
1381         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1382                 return -EINVAL;
1383
1384         /* Calls the specific handler */
1385         ret = ops->vidioc_s_std(file, fh, &norm);
1386
1387         /* Updates standard information */
1388         if (ret >= 0)
1389                 vfd->current_norm = norm;
1390         return ret;
1391 }
1392
1393 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1394                                 struct file *file, void *fh, void *arg)
1395 {
1396         struct video_device *vfd = video_devdata(file);
1397         v4l2_std_id *p = arg;
1398
1399         /*
1400          * If nothing detected, it should return all supported
1401          * standard.
1402          * Drivers just need to mask the std argument, in order
1403          * to remove the standards that don't apply from the mask.
1404          * This means that tuners, audio and video decoders can join
1405          * their efforts to improve the standards detection.
1406          */
1407         *p = vfd->tvnorms;
1408         return ops->vidioc_querystd(file, fh, arg);
1409 }
1410
1411 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1412                                 struct file *file, void *fh, void *arg)
1413 {
1414         struct video_device *vfd = video_devdata(file);
1415         struct v4l2_hw_freq_seek *p = arg;
1416         enum v4l2_tuner_type type;
1417
1418         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1419                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1420         if (p->type != type)
1421                 return -EINVAL;
1422         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1423 }
1424
1425 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1426                                 struct file *file, void *fh, void *arg)
1427 {
1428         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1429 }
1430
1431 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1432                                 struct file *file, void *fh, void *arg)
1433 {
1434         struct v4l2_requestbuffers *p = arg;
1435         int ret = check_fmt(file, p->type);
1436
1437         if (ret)
1438                 return ret;
1439
1440         CLEAR_AFTER_FIELD(p, memory);
1441
1442         return ops->vidioc_reqbufs(file, fh, p);
1443 }
1444
1445 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1446                                 struct file *file, void *fh, void *arg)
1447 {
1448         struct v4l2_buffer *p = arg;
1449         int ret = check_fmt(file, p->type);
1450
1451         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1452 }
1453
1454 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1455                                 struct file *file, void *fh, void *arg)
1456 {
1457         struct v4l2_buffer *p = arg;
1458         int ret = check_fmt(file, p->type);
1459
1460         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1461 }
1462
1463 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1464                                 struct file *file, void *fh, void *arg)
1465 {
1466         struct v4l2_buffer *p = arg;
1467         int ret = check_fmt(file, p->type);
1468
1469         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1470 }
1471
1472 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1473                                 struct file *file, void *fh, void *arg)
1474 {
1475         struct v4l2_create_buffers *create = arg;
1476         int ret = check_fmt(file, create->format.type);
1477
1478         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1479 }
1480
1481 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1482                                 struct file *file, void *fh, void *arg)
1483 {
1484         struct v4l2_buffer *b = arg;
1485         int ret = check_fmt(file, b->type);
1486
1487         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1488 }
1489
1490 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1491                                 struct file *file, void *fh, void *arg)
1492 {
1493         struct video_device *vfd = video_devdata(file);
1494         struct v4l2_streamparm *p = arg;
1495         v4l2_std_id std;
1496         int ret = check_fmt(file, p->type);
1497
1498         if (ret)
1499                 return ret;
1500         if (ops->vidioc_g_parm)
1501                 return ops->vidioc_g_parm(file, fh, p);
1502         std = vfd->current_norm;
1503         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1504             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1505                 return -EINVAL;
1506         p->parm.capture.readbuffers = 2;
1507         if (ops->vidioc_g_std)
1508                 ret = ops->vidioc_g_std(file, fh, &std);
1509         if (ret == 0)
1510                 v4l2_video_std_frame_period(std,
1511                             &p->parm.capture.timeperframe);
1512         return ret;
1513 }
1514
1515 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1516                                 struct file *file, void *fh, void *arg)
1517 {
1518         struct v4l2_streamparm *p = arg;
1519         int ret = check_fmt(file, p->type);
1520
1521         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1522 }
1523
1524 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1525                                 struct file *file, void *fh, void *arg)
1526 {
1527         struct video_device *vfd = video_devdata(file);
1528         struct v4l2_queryctrl *p = arg;
1529         struct v4l2_fh *vfh =
1530                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1531
1532         if (vfh && vfh->ctrl_handler)
1533                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1534         if (vfd->ctrl_handler)
1535                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1536         if (ops->vidioc_queryctrl)
1537                 return ops->vidioc_queryctrl(file, fh, p);
1538         return -ENOTTY;
1539 }
1540
1541 static int v4l_querymenu(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_querymenu *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_querymenu(vfh->ctrl_handler, p);
1551         if (vfd->ctrl_handler)
1552                 return v4l2_querymenu(vfd->ctrl_handler, p);
1553         if (ops->vidioc_querymenu)
1554                 return ops->vidioc_querymenu(file, fh, p);
1555         return -ENOTTY;
1556 }
1557
1558 static int v4l_g_ctrl(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_control *p = arg;
1563         struct v4l2_fh *vfh =
1564                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1565         struct v4l2_ext_controls ctrls;
1566         struct v4l2_ext_control ctrl;
1567
1568         if (vfh && vfh->ctrl_handler)
1569                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1570         if (vfd->ctrl_handler)
1571                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1572         if (ops->vidioc_g_ctrl)
1573                 return ops->vidioc_g_ctrl(file, fh, p);
1574         if (ops->vidioc_g_ext_ctrls == NULL)
1575                 return -ENOTTY;
1576
1577         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1578         ctrls.count = 1;
1579         ctrls.controls = &ctrl;
1580         ctrl.id = p->id;
1581         ctrl.value = p->value;
1582         if (check_ext_ctrls(&ctrls, 1)) {
1583                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1584
1585                 if (ret == 0)
1586                         p->value = ctrl.value;
1587                 return ret;
1588         }
1589         return -EINVAL;
1590 }
1591
1592 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1593                                 struct file *file, void *fh, void *arg)
1594 {
1595         struct video_device *vfd = video_devdata(file);
1596         struct v4l2_control *p = arg;
1597         struct v4l2_fh *vfh =
1598                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1599         struct v4l2_ext_controls ctrls;
1600         struct v4l2_ext_control ctrl;
1601
1602         if (vfh && vfh->ctrl_handler)
1603                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1604         if (vfd->ctrl_handler)
1605                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1606         if (ops->vidioc_s_ctrl)
1607                 return ops->vidioc_s_ctrl(file, fh, p);
1608         if (ops->vidioc_s_ext_ctrls == NULL)
1609                 return -ENOTTY;
1610
1611         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1612         ctrls.count = 1;
1613         ctrls.controls = &ctrl;
1614         ctrl.id = p->id;
1615         ctrl.value = p->value;
1616         if (check_ext_ctrls(&ctrls, 1))
1617                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1618         return -EINVAL;
1619 }
1620
1621 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1622                                 struct file *file, void *fh, void *arg)
1623 {
1624         struct video_device *vfd = video_devdata(file);
1625         struct v4l2_ext_controls *p = arg;
1626         struct v4l2_fh *vfh =
1627                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1628
1629         p->error_idx = p->count;
1630         if (vfh && vfh->ctrl_handler)
1631                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1632         if (vfd->ctrl_handler)
1633                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1634         if (ops->vidioc_g_ext_ctrls == NULL)
1635                 return -ENOTTY;
1636         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1637                                         -EINVAL;
1638 }
1639
1640 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1641                                 struct file *file, void *fh, void *arg)
1642 {
1643         struct video_device *vfd = video_devdata(file);
1644         struct v4l2_ext_controls *p = arg;
1645         struct v4l2_fh *vfh =
1646                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1647
1648         p->error_idx = p->count;
1649         if (vfh && vfh->ctrl_handler)
1650                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1651         if (vfd->ctrl_handler)
1652                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1653         if (ops->vidioc_s_ext_ctrls == NULL)
1654                 return -ENOTTY;
1655         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1656                                         -EINVAL;
1657 }
1658
1659 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1660                                 struct file *file, void *fh, void *arg)
1661 {
1662         struct video_device *vfd = video_devdata(file);
1663         struct v4l2_ext_controls *p = arg;
1664         struct v4l2_fh *vfh =
1665                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1666
1667         p->error_idx = p->count;
1668         if (vfh && vfh->ctrl_handler)
1669                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1670         if (vfd->ctrl_handler)
1671                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1672         if (ops->vidioc_try_ext_ctrls == NULL)
1673                 return -ENOTTY;
1674         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1675                                         -EINVAL;
1676 }
1677
1678 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1679                                 struct file *file, void *fh, void *arg)
1680 {
1681         struct v4l2_crop *p = arg;
1682         struct v4l2_selection s = {
1683                 .type = p->type,
1684         };
1685         int ret;
1686
1687         if (ops->vidioc_g_crop)
1688                 return ops->vidioc_g_crop(file, fh, p);
1689         /* simulate capture crop using selection api */
1690
1691         /* crop means compose for output devices */
1692         if (V4L2_TYPE_IS_OUTPUT(p->type))
1693                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1694         else
1695                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1696
1697         ret = ops->vidioc_g_selection(file, fh, &s);
1698
1699         /* copying results to old structure on success */
1700         if (!ret)
1701                 p->c = s.r;
1702         return ret;
1703 }
1704
1705 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1706                                 struct file *file, void *fh, void *arg)
1707 {
1708         struct v4l2_crop *p = arg;
1709         struct v4l2_selection s = {
1710                 .type = p->type,
1711                 .r = p->c,
1712         };
1713
1714         if (ops->vidioc_s_crop)
1715                 return ops->vidioc_s_crop(file, fh, p);
1716         /* simulate capture crop using selection api */
1717
1718         /* crop means compose for output devices */
1719         if (V4L2_TYPE_IS_OUTPUT(p->type))
1720                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1721         else
1722                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1723
1724         return ops->vidioc_s_selection(file, fh, &s);
1725 }
1726
1727 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1728                                 struct file *file, void *fh, void *arg)
1729 {
1730         struct v4l2_cropcap *p = arg;
1731         struct v4l2_selection s = { .type = p->type };
1732         int ret;
1733
1734         if (ops->vidioc_cropcap)
1735                 return ops->vidioc_cropcap(file, fh, p);
1736
1737         /* obtaining bounds */
1738         if (V4L2_TYPE_IS_OUTPUT(p->type))
1739                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1740         else
1741                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1742
1743         ret = ops->vidioc_g_selection(file, fh, &s);
1744         if (ret)
1745                 return ret;
1746         p->bounds = s.r;
1747
1748         /* obtaining defrect */
1749         if (V4L2_TYPE_IS_OUTPUT(p->type))
1750                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1751         else
1752                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1753
1754         ret = ops->vidioc_g_selection(file, fh, &s);
1755         if (ret)
1756                 return ret;
1757         p->defrect = s.r;
1758
1759         /* setting trivial pixelaspect */
1760         p->pixelaspect.numerator = 1;
1761         p->pixelaspect.denominator = 1;
1762         return 0;
1763 }
1764
1765 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1766                                 struct file *file, void *fh, void *arg)
1767 {
1768         struct video_device *vfd = video_devdata(file);
1769         int ret;
1770
1771         if (vfd->v4l2_dev)
1772                 pr_info("%s: =================  START STATUS  =================\n",
1773                         vfd->v4l2_dev->name);
1774         ret = ops->vidioc_log_status(file, fh);
1775         if (vfd->v4l2_dev)
1776                 pr_info("%s: ==================  END STATUS  ==================\n",
1777                         vfd->v4l2_dev->name);
1778         return ret;
1779 }
1780
1781 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1782                                 struct file *file, void *fh, void *arg)
1783 {
1784 #ifdef CONFIG_VIDEO_ADV_DEBUG
1785         struct v4l2_dbg_register *p = arg;
1786
1787         if (!capable(CAP_SYS_ADMIN))
1788                 return -EPERM;
1789         return ops->vidioc_g_register(file, fh, p);
1790 #else
1791         return -ENOTTY;
1792 #endif
1793 }
1794
1795 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1796                                 struct file *file, void *fh, void *arg)
1797 {
1798 #ifdef CONFIG_VIDEO_ADV_DEBUG
1799         struct v4l2_dbg_register *p = arg;
1800
1801         if (!capable(CAP_SYS_ADMIN))
1802                 return -EPERM;
1803         return ops->vidioc_s_register(file, fh, p);
1804 #else
1805         return -ENOTTY;
1806 #endif
1807 }
1808
1809 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1810                                 struct file *file, void *fh, void *arg)
1811 {
1812         struct v4l2_dbg_chip_ident *p = arg;
1813
1814         p->ident = V4L2_IDENT_NONE;
1815         p->revision = 0;
1816         return ops->vidioc_g_chip_ident(file, fh, p);
1817 }
1818
1819 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1820                                 struct file *file, void *fh, void *arg)
1821 {
1822         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1823 }
1824
1825 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1826                                 struct file *file, void *fh, void *arg)
1827 {
1828         return ops->vidioc_subscribe_event(fh, arg);
1829 }
1830
1831 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1832                                 struct file *file, void *fh, void *arg)
1833 {
1834         return ops->vidioc_unsubscribe_event(fh, arg);
1835 }
1836
1837 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1838                                 struct file *file, void *fh, void *arg)
1839 {
1840         struct v4l2_sliced_vbi_cap *p = arg;
1841         int ret = check_fmt(file, p->type);
1842
1843         if (ret)
1844                 return ret;
1845
1846         /* Clear up to type, everything after type is zeroed already */
1847         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1848
1849         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1850 }
1851
1852 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1853                                 struct file *file, void *fh, void *arg)
1854 {
1855         struct video_device *vfd = video_devdata(file);
1856         struct v4l2_frequency_band *p = arg;
1857         enum v4l2_tuner_type type;
1858         int err;
1859
1860         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1861                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1862
1863         if (type != p->type)
1864                 return -EINVAL;
1865         if (ops->vidioc_enum_freq_bands)
1866                 return ops->vidioc_enum_freq_bands(file, fh, p);
1867         if (ops->vidioc_g_tuner) {
1868                 struct v4l2_tuner t = {
1869                         .index = p->tuner,
1870                         .type = type,
1871                 };
1872
1873                 if (p->index)
1874                         return -EINVAL;
1875                 err = ops->vidioc_g_tuner(file, fh, &t);
1876                 if (err)
1877                         return err;
1878                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1879                 p->rangelow = t.rangelow;
1880                 p->rangehigh = t.rangehigh;
1881                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1882                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1883                 return 0;
1884         }
1885         if (ops->vidioc_g_modulator) {
1886                 struct v4l2_modulator m = {
1887                         .index = p->tuner,
1888                 };
1889
1890                 if (type != V4L2_TUNER_RADIO)
1891                         return -EINVAL;
1892                 if (p->index)
1893                         return -EINVAL;
1894                 err = ops->vidioc_g_modulator(file, fh, &m);
1895                 if (err)
1896                         return err;
1897                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1898                 p->rangelow = m.rangelow;
1899                 p->rangehigh = m.rangehigh;
1900                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1901                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1902                 return 0;
1903         }
1904         return -ENOTTY;
1905 }
1906
1907 struct v4l2_ioctl_info {
1908         unsigned int ioctl;
1909         u32 flags;
1910         const char * const name;
1911         union {
1912                 u32 offset;
1913                 int (*func)(const struct v4l2_ioctl_ops *ops,
1914                                 struct file *file, void *fh, void *p);
1915         } u;
1916         void (*debug)(const void *arg, bool write_only);
1917 };
1918
1919 /* This control needs a priority check */
1920 #define INFO_FL_PRIO    (1 << 0)
1921 /* This control can be valid if the filehandle passes a control handler. */
1922 #define INFO_FL_CTRL    (1 << 1)
1923 /* This is a standard ioctl, no need for special code */
1924 #define INFO_FL_STD     (1 << 2)
1925 /* This is ioctl has its own function */
1926 #define INFO_FL_FUNC    (1 << 3)
1927 /* Queuing ioctl */
1928 #define INFO_FL_QUEUE   (1 << 4)
1929 /* Zero struct from after the field to the end */
1930 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1931         ((offsetof(struct v4l2_struct, field) +                 \
1932           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1933 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1934
1935 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1936         [_IOC_NR(_ioctl)] = {                                           \
1937                 .ioctl = _ioctl,                                        \
1938                 .flags = _flags | INFO_FL_STD,                          \
1939                 .name = #_ioctl,                                        \
1940                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1941                 .debug = _debug,                                        \
1942         }
1943
1944 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1945         [_IOC_NR(_ioctl)] = {                                           \
1946                 .ioctl = _ioctl,                                        \
1947                 .flags = _flags | INFO_FL_FUNC,                         \
1948                 .name = #_ioctl,                                        \
1949                 .u.func = _func,                                        \
1950                 .debug = _debug,                                        \
1951         }
1952
1953 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1954         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1955         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1956         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1957         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1958         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1959         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1960         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1961         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1962         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
1963         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1964         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1965         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1966         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1967         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1968         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1969         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1970         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1971         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1972         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1973         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1974         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1975         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1976         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1977         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1978         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1979         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1980         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1981         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
1982         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
1983         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
1984         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
1985         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
1986         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
1987         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
1988         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
1989         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
1990         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
1991         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
1992         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
1993         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
1994         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
1995         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
1996         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
1997         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
1998         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
1999         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2000         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2001         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2002         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2003         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2004         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2005         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)),
2006         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2007         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2008         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2009         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2010         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2011         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2012         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2013         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2014         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2015         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2016         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2017         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2018         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2019         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2020         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2021         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
2022         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
2023         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
2024         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
2025         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2026         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2027         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2028         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2029         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2030         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2031         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2032         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2033         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2034         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2035         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2036 };
2037 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2038
2039 bool v4l2_is_known_ioctl(unsigned int cmd)
2040 {
2041         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2042                 return false;
2043         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2044 }
2045
2046 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2047 {
2048         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2049                 return vdev->lock;
2050         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2051                 return NULL;
2052         if (vdev->queue && vdev->queue->lock &&
2053                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2054                 return vdev->queue->lock;
2055         return vdev->lock;
2056 }
2057
2058 /* Common ioctl debug function. This function can be used by
2059    external ioctl messages as well as internal V4L ioctl */
2060 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2061 {
2062         const char *dir, *type;
2063
2064         if (prefix)
2065                 printk(KERN_DEBUG "%s: ", prefix);
2066
2067         switch (_IOC_TYPE(cmd)) {
2068         case 'd':
2069                 type = "v4l2_int";
2070                 break;
2071         case 'V':
2072                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2073                         type = "v4l2";
2074                         break;
2075                 }
2076                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2077                 return;
2078         default:
2079                 type = "unknown";
2080                 break;
2081         }
2082
2083         switch (_IOC_DIR(cmd)) {
2084         case _IOC_NONE:              dir = "--"; break;
2085         case _IOC_READ:              dir = "r-"; break;
2086         case _IOC_WRITE:             dir = "-w"; break;
2087         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2088         default:                     dir = "*ERR*"; break;
2089         }
2090         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2091                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2092 }
2093 EXPORT_SYMBOL(v4l_printk_ioctl);
2094
2095 static long __video_do_ioctl(struct file *file,
2096                 unsigned int cmd, void *arg)
2097 {
2098         struct video_device *vfd = video_devdata(file);
2099         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2100         bool write_only = false;
2101         struct v4l2_ioctl_info default_info;
2102         const struct v4l2_ioctl_info *info;
2103         void *fh = file->private_data;
2104         struct v4l2_fh *vfh = NULL;
2105         int use_fh_prio = 0;
2106         int debug = vfd->debug;
2107         long ret = -ENOTTY;
2108
2109         if (ops == NULL) {
2110                 pr_warn("%s: has no ioctl_ops.\n",
2111                                 video_device_node_name(vfd));
2112                 return ret;
2113         }
2114
2115         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2116                 vfh = file->private_data;
2117                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2118         }
2119
2120         if (v4l2_is_known_ioctl(cmd)) {
2121                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2122
2123                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2124                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2125                         goto done;
2126
2127                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2128                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2129                         if (ret)
2130                                 goto done;
2131                 }
2132         } else {
2133                 default_info.ioctl = cmd;
2134                 default_info.flags = 0;
2135                 default_info.debug = v4l_print_default;
2136                 info = &default_info;
2137         }
2138
2139         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2140         if (write_only && debug > V4L2_DEBUG_IOCTL) {
2141                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2142                 pr_cont(": ");
2143                 info->debug(arg, write_only);
2144         }
2145         if (info->flags & INFO_FL_STD) {
2146                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2147                 const void *p = vfd->ioctl_ops;
2148                 const vidioc_op *vidioc = p + info->u.offset;
2149
2150                 ret = (*vidioc)(file, fh, arg);
2151         } else if (info->flags & INFO_FL_FUNC) {
2152                 ret = info->u.func(ops, file, fh, arg);
2153         } else if (!ops->vidioc_default) {
2154                 ret = -ENOTTY;
2155         } else {
2156                 ret = ops->vidioc_default(file, fh,
2157                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2158                         cmd, arg);
2159         }
2160
2161 done:
2162         if (debug) {
2163                 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2164                         if (ret < 0)
2165                                 printk(KERN_DEBUG "%s: error %ld\n",
2166                                         video_device_node_name(vfd), ret);
2167                         return ret;
2168                 }
2169                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2170                 if (ret < 0)
2171                         pr_cont(": error %ld\n", ret);
2172                 else if (debug == V4L2_DEBUG_IOCTL)
2173                         pr_cont("\n");
2174                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2175                         info->debug(arg, write_only);
2176                 else {
2177                         pr_cont(": ");
2178                         info->debug(arg, write_only);
2179                 }
2180         }
2181
2182         return ret;
2183 }
2184
2185 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2186                             void * __user *user_ptr, void ***kernel_ptr)
2187 {
2188         int ret = 0;
2189
2190         switch (cmd) {
2191         case VIDIOC_QUERYBUF:
2192         case VIDIOC_QBUF:
2193         case VIDIOC_DQBUF: {
2194                 struct v4l2_buffer *buf = parg;
2195
2196                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2197                         if (buf->length > VIDEO_MAX_PLANES) {
2198                                 ret = -EINVAL;
2199                                 break;
2200                         }
2201                         *user_ptr = (void __user *)buf->m.planes;
2202                         *kernel_ptr = (void *)&buf->m.planes;
2203                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2204                         ret = 1;
2205                 }
2206                 break;
2207         }
2208
2209         case VIDIOC_SUBDEV_G_EDID:
2210         case VIDIOC_SUBDEV_S_EDID: {
2211                 struct v4l2_subdev_edid *edid = parg;
2212
2213                 if (edid->blocks) {
2214                         *user_ptr = (void __user *)edid->edid;
2215                         *kernel_ptr = (void *)&edid->edid;
2216                         *array_size = edid->blocks * 128;
2217                         ret = 1;
2218                 }
2219                 break;
2220         }
2221
2222         case VIDIOC_S_EXT_CTRLS:
2223         case VIDIOC_G_EXT_CTRLS:
2224         case VIDIOC_TRY_EXT_CTRLS: {
2225                 struct v4l2_ext_controls *ctrls = parg;
2226
2227                 if (ctrls->count != 0) {
2228                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2229                                 ret = -EINVAL;
2230                                 break;
2231                         }
2232                         *user_ptr = (void __user *)ctrls->controls;
2233                         *kernel_ptr = (void *)&ctrls->controls;
2234                         *array_size = sizeof(struct v4l2_ext_control)
2235                                     * ctrls->count;
2236                         ret = 1;
2237                 }
2238                 break;
2239         }
2240         }
2241
2242         return ret;
2243 }
2244
2245 long
2246 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2247                v4l2_kioctl func)
2248 {
2249         char    sbuf[128];
2250         void    *mbuf = NULL;
2251         void    *parg = (void *)arg;
2252         long    err  = -EINVAL;
2253         bool    has_array_args;
2254         size_t  array_size = 0;
2255         void __user *user_ptr = NULL;
2256         void    **kernel_ptr = NULL;
2257
2258         /*  Copy arguments into temp kernel buffer  */
2259         if (_IOC_DIR(cmd) != _IOC_NONE) {
2260                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2261                         parg = sbuf;
2262                 } else {
2263                         /* too big to allocate from stack */
2264                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2265                         if (NULL == mbuf)
2266                                 return -ENOMEM;
2267                         parg = mbuf;
2268                 }
2269
2270                 err = -EFAULT;
2271                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2272                         unsigned int n = _IOC_SIZE(cmd);
2273
2274                         /*
2275                          * In some cases, only a few fields are used as input,
2276                          * i.e. when the app sets "index" and then the driver
2277                          * fills in the rest of the structure for the thing
2278                          * with that index.  We only need to copy up the first
2279                          * non-input field.
2280                          */
2281                         if (v4l2_is_known_ioctl(cmd)) {
2282                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2283                                 if (flags & INFO_FL_CLEAR_MASK)
2284                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2285                         }
2286
2287                         if (copy_from_user(parg, (void __user *)arg, n))
2288                                 goto out;
2289
2290                         /* zero out anything we don't copy from userspace */
2291                         if (n < _IOC_SIZE(cmd))
2292                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2293                 } else {
2294                         /* read-only ioctl */
2295                         memset(parg, 0, _IOC_SIZE(cmd));
2296                 }
2297         }
2298
2299         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2300         if (err < 0)
2301                 goto out;
2302         has_array_args = err;
2303
2304         if (has_array_args) {
2305                 /*
2306                  * When adding new types of array args, make sure that the
2307                  * parent argument to ioctl (which contains the pointer to the
2308                  * array) fits into sbuf (so that mbuf will still remain
2309                  * unused up to here).
2310                  */
2311                 mbuf = kmalloc(array_size, GFP_KERNEL);
2312                 err = -ENOMEM;
2313                 if (NULL == mbuf)
2314                         goto out_array_args;
2315                 err = -EFAULT;
2316                 if (copy_from_user(mbuf, user_ptr, array_size))
2317                         goto out_array_args;
2318                 *kernel_ptr = mbuf;
2319         }
2320
2321         /* Handles IOCTL */
2322         err = func(file, cmd, parg);
2323         if (err == -ENOIOCTLCMD)
2324                 err = -ENOTTY;
2325
2326         if (has_array_args) {
2327                 *kernel_ptr = user_ptr;
2328                 if (copy_to_user(user_ptr, mbuf, array_size))
2329                         err = -EFAULT;
2330                 goto out_array_args;
2331         }
2332         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2333            results that must be returned. */
2334         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2335                 goto out;
2336
2337 out_array_args:
2338         /*  Copy results into user buffer  */
2339         switch (_IOC_DIR(cmd)) {
2340         case _IOC_READ:
2341         case (_IOC_WRITE | _IOC_READ):
2342                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2343                         err = -EFAULT;
2344                 break;
2345         }
2346
2347 out:
2348         kfree(mbuf);
2349         return err;
2350 }
2351 EXPORT_SYMBOL(video_usercopy);
2352
2353 long video_ioctl2(struct file *file,
2354                unsigned int cmd, unsigned long arg)
2355 {
2356         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2357 }
2358 EXPORT_SYMBOL(video_ioctl2);