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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-chip-ident.h>
  30 #include <media/videobuf2-core.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40 struct std_descr {
  41         v4l2_std_id std;
  42         const char *descr;
  43 };
  44
  45 static const struct std_descr standards[] = {
  46         { V4L2_STD_NTSC,        "NTSC"      },
  47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51         { V4L2_STD_PAL,         "PAL"       },
  52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53         { V4L2_STD_PAL_B,       "PAL-B"     },
  54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55         { V4L2_STD_PAL_G,       "PAL-G"     },
  56         { V4L2_STD_PAL_H,       "PAL-H"     },
  57         { V4L2_STD_PAL_I,       "PAL-I"     },
  58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59         { V4L2_STD_PAL_D,       "PAL-D"     },
  60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61         { V4L2_STD_PAL_K,       "PAL-K"     },
  62         { V4L2_STD_PAL_M,       "PAL-M"     },
  63         { V4L2_STD_PAL_N,       "PAL-N"     },
  64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65         { V4L2_STD_PAL_60,      "PAL-60"    },
  66         { V4L2_STD_SECAM,       "SECAM"     },
  67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76         { 0,                    "Unknown"   }
  77 };
  78
  79 /* video4linux standard ID conversion to standard name
  80  */
  81 const char *v4l2_norm_to_name(v4l2_std_id id)
  82 {
  83         u32 myid = id;
  84         int i;
  85
  86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87            64 bit comparations. So, on that architecture, with some gcc
  88            variants, compilation fails. Currently, the max value is 30bit wide.
  89          */
  90         BUG_ON(myid != id);
  91
  92         for (i = 0; standards[i].std; i++)
  93                 if (myid == standards[i].std)
  94                         break;
  95         return standards[i].descr;
  96 }
  97 EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99 /* Returns frame period for the given standard */
 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101 {
 102         if (id & V4L2_STD_525_60) {
 103                 frameperiod->numerator = 1001;
 104                 frameperiod->denominator = 30000;
 105         } else {
 106                 frameperiod->numerator = 1;
 107                 frameperiod->denominator = 25;
 108         }
 109 }
 110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112 /* Fill in the fields of a v4l2_standard structure according to the
 113    'id' and 'transmission' parameters.  Returns negative on error.  */
 114 int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                              int id, const char *name)
 116 {
 117         vs->id = id;
 118         v4l2_video_std_frame_period(id, &vs->frameperiod);
 119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120         strlcpy(vs->name, name, sizeof(vs->name));
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125 /* ----------------------------------------------------------------- */
 126 /* some arrays for pretty-printing debug messages of enum types      */
 127
 128 const char *v4l2_field_names[] = {
 129         [V4L2_FIELD_ANY]        = "any",
 130         [V4L2_FIELD_NONE]       = "none",
 131         [V4L2_FIELD_TOP]        = "top",
 132         [V4L2_FIELD_BOTTOM]     = "bottom",
 133         [V4L2_FIELD_INTERLACED] = "interlaced",
 134         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 135         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 136         [V4L2_FIELD_ALTERNATE]  = "alternate",
 137         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 138         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 139 };
 140 EXPORT_SYMBOL(v4l2_field_names);
 141
 142 const char *v4l2_type_names[] = {
 143         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 144         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 145         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 146         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 147         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 148         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 149         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 151         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 153 };
 154 EXPORT_SYMBOL(v4l2_type_names);
 155
 156 static const char *v4l2_memory_names[] = {
 157         [V4L2_MEMORY_MMAP]    = "mmap",
 158         [V4L2_MEMORY_USERPTR] = "userptr",
 159         [V4L2_MEMORY_OVERLAY] = "overlay",
 160         [V4L2_MEMORY_DMABUF] = "dmabuf",
 161 };
 162
 163 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 164
 165 /* ------------------------------------------------------------------ */
 166 /* debug help functions                                               */
 167
 168 static void v4l_print_querycap(const void *arg, bool write_only)
 169 {
 170         const struct v4l2_capability *p = arg;
 171
 172         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 173                 "capabilities=0x%08x, device_caps=0x%08x\n",
 174                 (int)sizeof(p->driver), p->driver,
 175                 (int)sizeof(p->card), p->card,
 176                 (int)sizeof(p->bus_info), p->bus_info,
 177                 p->version, p->capabilities, p->device_caps);
 178 }
 179
 180 static void v4l_print_enuminput(const void *arg, bool write_only)
 181 {
 182         const struct v4l2_input *p = arg;
 183
 184         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 185                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 186                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 187                 p->tuner, (unsigned long long)p->std, p->status,
 188                 p->capabilities);
 189 }
 190
 191 static void v4l_print_enumoutput(const void *arg, bool write_only)
 192 {
 193         const struct v4l2_output *p = arg;
 194
 195         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 196                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 197                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 198                 p->modulator, (unsigned long long)p->std, p->capabilities);
 199 }
 200
 201 static void v4l_print_audio(const void *arg, bool write_only)
 202 {
 203         const struct v4l2_audio *p = arg;
 204
 205         if (write_only)
 206                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 207         else
 208                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 209                         p->index, (int)sizeof(p->name), p->name,
 210                         p->capability, p->mode);
 211 }
 212
 213 static void v4l_print_audioout(const void *arg, bool write_only)
 214 {
 215         const struct v4l2_audioout *p = arg;
 216
 217         if (write_only)
 218                 pr_cont("index=%u\n", p->index);
 219         else
 220                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 221                         p->index, (int)sizeof(p->name), p->name,
 222                         p->capability, p->mode);
 223 }
 224
 225 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 226 {
 227         const struct v4l2_fmtdesc *p = arg;
 228
 229         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 230                 p->index, prt_names(p->type, v4l2_type_names),
 231                 p->flags, (p->pixelformat & 0xff),
 232                 (p->pixelformat >>  8) & 0xff,
 233                 (p->pixelformat >> 16) & 0xff,
 234                 (p->pixelformat >> 24) & 0xff,
 235                 (int)sizeof(p->description), p->description);
 236 }
 237
 238 static void v4l_print_format(const void *arg, bool write_only)
 239 {
 240         const struct v4l2_format *p = arg;
 241         const struct v4l2_pix_format *pix;
 242         const struct v4l2_pix_format_mplane *mp;
 243         const struct v4l2_vbi_format *vbi;
 244         const struct v4l2_sliced_vbi_format *sliced;
 245         const struct v4l2_window *win;
 246         const struct v4l2_clip *clip;
 247         unsigned i;
 248
 249         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 250         switch (p->type) {
 251         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 252         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 253                 pix = &p->fmt.pix;
 254                 pr_cont(", width=%u, height=%u, "
 255                         "pixelformat=%c%c%c%c, field=%s, "
 256                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 257                         pix->width, pix->height,
 258                         (pix->pixelformat & 0xff),
 259                         (pix->pixelformat >>  8) & 0xff,
 260                         (pix->pixelformat >> 16) & 0xff,
 261                         (pix->pixelformat >> 24) & 0xff,
 262                         prt_names(pix->field, v4l2_field_names),
 263                         pix->bytesperline, pix->sizeimage,
 264                         pix->colorspace);
 265                 break;
 266         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 267         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 268                 mp = &p->fmt.pix_mp;
 269                 pr_cont(", width=%u, height=%u, "
 270                         "format=%c%c%c%c, field=%s, "
 271                         "colorspace=%d, num_planes=%u\n",
 272                         mp->width, mp->height,
 273                         (mp->pixelformat & 0xff),
 274                         (mp->pixelformat >>  8) & 0xff,
 275                         (mp->pixelformat >> 16) & 0xff,
 276                         (mp->pixelformat >> 24) & 0xff,
 277                         prt_names(mp->field, v4l2_field_names),
 278                         mp->colorspace, mp->num_planes);
 279                 for (i = 0; i < mp->num_planes; i++)
 280                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 281                                         mp->plane_fmt[i].bytesperline,
 282                                         mp->plane_fmt[i].sizeimage);
 283                 break;
 284         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 285         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 286                 win = &p->fmt.win;
 287                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 288                         "chromakey=0x%08x, bitmap=%p, "
 289                         "global_alpha=0x%02x\n",
 290                         win->w.width, win->w.height,
 291                         win->w.left, win->w.top,
 292                         prt_names(win->field, v4l2_field_names),
 293                         win->chromakey, win->bitmap, win->global_alpha);
 294                 clip = win->clips;
 295                 for (i = 0; i < win->clipcount; i++) {
 296                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 297                                         i, clip->c.width, clip->c.height,
 298                                         clip->c.left, clip->c.top);
 299                         clip = clip->next;
 300                 }
 301                 break;
 302         case V4L2_BUF_TYPE_VBI_CAPTURE:
 303         case V4L2_BUF_TYPE_VBI_OUTPUT:
 304                 vbi = &p->fmt.vbi;
 305                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 306                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 307                         vbi->sampling_rate, vbi->offset,
 308                         vbi->samples_per_line,
 309                         (vbi->sample_format & 0xff),
 310                         (vbi->sample_format >>  8) & 0xff,
 311                         (vbi->sample_format >> 16) & 0xff,
 312                         (vbi->sample_format >> 24) & 0xff,
 313                         vbi->start[0], vbi->start[1],
 314                         vbi->count[0], vbi->count[1]);
 315                 break;
 316         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 317         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 318                 sliced = &p->fmt.sliced;
 319                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 320                                 sliced->service_set, sliced->io_size);
 321                 for (i = 0; i < 24; i++)
 322                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 323                                 sliced->service_lines[0][i],
 324                                 sliced->service_lines[1][i]);
 325                 break;
 326         }
 327 }
 328
 329 static void v4l_print_framebuffer(const void *arg, bool write_only)
 330 {
 331         const struct v4l2_framebuffer *p = arg;
 332
 333         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 334                 "height=%u, pixelformat=%c%c%c%c, "
 335                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 336                         p->capability, p->flags, p->base,
 337                         p->fmt.width, p->fmt.height,
 338                         (p->fmt.pixelformat & 0xff),
 339                         (p->fmt.pixelformat >>  8) & 0xff,
 340                         (p->fmt.pixelformat >> 16) & 0xff,
 341                         (p->fmt.pixelformat >> 24) & 0xff,
 342                         p->fmt.bytesperline, p->fmt.sizeimage,
 343                         p->fmt.colorspace);
 344 }
 345
 346 static void v4l_print_buftype(const void *arg, bool write_only)
 347 {
 348         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 349 }
 350
 351 static void v4l_print_modulator(const void *arg, bool write_only)
 352 {
 353         const struct v4l2_modulator *p = arg;
 354
 355         if (write_only)
 356                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 357         else
 358                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 359                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 360                         p->index, (int)sizeof(p->name), p->name, p->capability,
 361                         p->rangelow, p->rangehigh, p->txsubchans);
 362 }
 363
 364 static void v4l_print_tuner(const void *arg, bool write_only)
 365 {
 366         const struct v4l2_tuner *p = arg;
 367
 368         if (write_only)
 369                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 370         else
 371                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 372                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 373                         "rxsubchans=0x%x, audmode=%u\n",
 374                         p->index, (int)sizeof(p->name), p->name, p->type,
 375                         p->capability, p->rangelow,
 376                         p->rangehigh, p->signal, p->afc,
 377                         p->rxsubchans, p->audmode);
 378 }
 379
 380 static void v4l_print_frequency(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_frequency *p = arg;
 383
 384         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 385                                 p->tuner, p->type, p->frequency);
 386 }
 387
 388 static void v4l_print_standard(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_standard *p = arg;
 391
 392         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 393                 "framelines=%u\n", p->index,
 394                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 395                 p->frameperiod.numerator,
 396                 p->frameperiod.denominator,
 397                 p->framelines);
 398 }
 399
 400 static void v4l_print_std(const void *arg, bool write_only)
 401 {
 402         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 403 }
 404
 405 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 406 {
 407         const struct v4l2_hw_freq_seek *p = arg;
 408
 409         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 410                 "rangelow=%u, rangehigh=%u\n",
 411                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 412                 p->rangelow, p->rangehigh);
 413 }
 414
 415 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 416 {
 417         const struct v4l2_requestbuffers *p = arg;
 418
 419         pr_cont("count=%d, type=%s, memory=%s\n",
 420                 p->count,
 421                 prt_names(p->type, v4l2_type_names),
 422                 prt_names(p->memory, v4l2_memory_names));
 423 }
 424
 425 static void v4l_print_buffer(const void *arg, bool write_only)
 426 {
 427         const struct v4l2_buffer *p = arg;
 428         const struct v4l2_timecode *tc = &p->timecode;
 429         const struct v4l2_plane *plane;
 430         int i;
 431
 432         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 433                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 434                         p->timestamp.tv_sec / 3600,
 435                         (int)(p->timestamp.tv_sec / 60) % 60,
 436                         (int)(p->timestamp.tv_sec % 60),
 437                         (long)p->timestamp.tv_usec,
 438                         p->index,
 439                         prt_names(p->type, v4l2_type_names),
 440                         p->flags, prt_names(p->field, v4l2_field_names),
 441                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 442
 443         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 444                 pr_cont("\n");
 445                 for (i = 0; i < p->length; ++i) {
 446                         plane = &p->m.planes[i];
 447                         printk(KERN_DEBUG
 448                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 449                                 "offset/userptr=0x%lx, length=%d\n",
 450                                 i, plane->bytesused, plane->data_offset,
 451                                 plane->m.userptr, plane->length);
 452                 }
 453         } else {
 454                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 455                         p->bytesused, p->m.userptr, p->length);
 456         }
 457
 458         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 459                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 460                         tc->hours, tc->minutes, tc->seconds,
 461                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 462 }
 463
 464 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 465 {
 466         const struct v4l2_exportbuffer *p = arg;
 467
 468         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 469                 p->fd, prt_names(p->type, v4l2_type_names),
 470                 p->index, p->plane, p->flags);
 471 }
 472
 473 static void v4l_print_create_buffers(const void *arg, bool write_only)
 474 {
 475         const struct v4l2_create_buffers *p = arg;
 476
 477         pr_cont("index=%d, count=%d, memory=%s, ",
 478                         p->index, p->count,
 479                         prt_names(p->memory, v4l2_memory_names));
 480         v4l_print_format(&p->format, write_only);
 481 }
 482
 483 static void v4l_print_streamparm(const void *arg, bool write_only)
 484 {
 485         const struct v4l2_streamparm *p = arg;
 486
 487         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 488
 489         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 490             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 491                 const struct v4l2_captureparm *c = &p->parm.capture;
 492
 493                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 494                         "extendedmode=%d, readbuffers=%d\n",
 495                         c->capability, c->capturemode,
 496                         c->timeperframe.numerator, c->timeperframe.denominator,
 497                         c->extendedmode, c->readbuffers);
 498         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 499                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 500                 const struct v4l2_outputparm *c = &p->parm.output;
 501
 502                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 503                         "extendedmode=%d, writebuffers=%d\n",
 504                         c->capability, c->outputmode,
 505                         c->timeperframe.numerator, c->timeperframe.denominator,
 506                         c->extendedmode, c->writebuffers);
 507         }
 508 }
 509
 510 static void v4l_print_queryctrl(const void *arg, bool write_only)
 511 {
 512         const struct v4l2_queryctrl *p = arg;
 513
 514         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 515                 "step=%d, default=%d, flags=0x%08x\n",
 516                         p->id, p->type, (int)sizeof(p->name), p->name,
 517                         p->minimum, p->maximum,
 518                         p->step, p->default_value, p->flags);
 519 }
 520
 521 static void v4l_print_querymenu(const void *arg, bool write_only)
 522 {
 523         const struct v4l2_querymenu *p = arg;
 524
 525         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 526 }
 527
 528 static void v4l_print_control(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_control *p = arg;
 531
 532         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 533 }
 534
 535 static void v4l_print_ext_controls(const void *arg, bool write_only)
 536 {
 537         const struct v4l2_ext_controls *p = arg;
 538         int i;
 539
 540         pr_cont("class=0x%x, count=%d, error_idx=%d",
 541                         p->ctrl_class, p->count, p->error_idx);
 542         for (i = 0; i < p->count; i++) {
 543                 if (p->controls[i].size)
 544                         pr_cont(", id/val=0x%x/0x%x",
 545                                 p->controls[i].id, p->controls[i].value);
 546                 else
 547                         pr_cont(", id/size=0x%x/%u",
 548                                 p->controls[i].id, p->controls[i].size);
 549         }
 550         pr_cont("\n");
 551 }
 552
 553 static void v4l_print_cropcap(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_cropcap *p = arg;
 556
 557         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 558                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 559                 "pixelaspect %d/%d\n",
 560                 prt_names(p->type, v4l2_type_names),
 561                 p->bounds.width, p->bounds.height,
 562                 p->bounds.left, p->bounds.top,
 563                 p->defrect.width, p->defrect.height,
 564                 p->defrect.left, p->defrect.top,
 565                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 566 }
 567
 568 static void v4l_print_crop(const void *arg, bool write_only)
 569 {
 570         const struct v4l2_crop *p = arg;
 571
 572         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 573                 prt_names(p->type, v4l2_type_names),
 574                 p->c.width, p->c.height,
 575                 p->c.left, p->c.top);
 576 }
 577
 578 static void v4l_print_selection(const void *arg, bool write_only)
 579 {
 580         const struct v4l2_selection *p = arg;
 581
 582         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 583                 prt_names(p->type, v4l2_type_names),
 584                 p->target, p->flags,
 585                 p->r.width, p->r.height, p->r.left, p->r.top);
 586 }
 587
 588 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_jpegcompression *p = arg;
 591
 592         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 593                 "COM_len=%d, jpeg_markers=0x%x\n",
 594                 p->quality, p->APPn, p->APP_len,
 595                 p->COM_len, p->jpeg_markers);
 596 }
 597
 598 static void v4l_print_enc_idx(const void *arg, bool write_only)
 599 {
 600         const struct v4l2_enc_idx *p = arg;
 601
 602         pr_cont("entries=%d, entries_cap=%d\n",
 603                         p->entries, p->entries_cap);
 604 }
 605
 606 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 607 {
 608         const struct v4l2_encoder_cmd *p = arg;
 609
 610         pr_cont("cmd=%d, flags=0x%x\n",
 611                         p->cmd, p->flags);
 612 }
 613
 614 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 615 {
 616         const struct v4l2_decoder_cmd *p = arg;
 617
 618         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 619
 620         if (p->cmd == V4L2_DEC_CMD_START)
 621                 pr_info("speed=%d, format=%u\n",
 622                                 p->start.speed, p->start.format);
 623         else if (p->cmd == V4L2_DEC_CMD_STOP)
 624                 pr_info("pts=%llu\n", p->stop.pts);
 625 }
 626
 627 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_dbg_chip_ident *p = arg;
 630
 631         pr_cont("type=%u, ", p->match.type);
 632         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 633                 pr_cont("name=%.*s, ",
 634                                 (int)sizeof(p->match.name), p->match.name);
 635         else
 636                 pr_cont("addr=%u, ", p->match.addr);
 637         pr_cont("chip_ident=%u, revision=0x%x\n",
 638                         p->ident, p->revision);
 639 }
 640
 641 static void v4l_print_dbg_register(const void *arg, bool write_only)
 642 {
 643         const struct v4l2_dbg_register *p = arg;
 644
 645         pr_cont("type=%u, ", p->match.type);
 646         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 647                 pr_cont("name=%.*s, ",
 648                                 (int)sizeof(p->match.name), p->match.name);
 649         else
 650                 pr_cont("addr=%u, ", p->match.addr);
 651         pr_cont("reg=0x%llx, val=0x%llx\n",
 652                         p->reg, p->val);
 653 }
 654
 655 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
 656 {
 657         const struct v4l2_dv_enum_preset *p = arg;
 658
 659         pr_cont("index=%u, preset=%u, name=%.*s, width=%u, height=%u\n",
 660                         p->index, p->preset,
 661                         (int)sizeof(p->name), p->name, p->width, p->height);
 662 }
 663
 664 static void v4l_print_dv_preset(const void *arg, bool write_only)
 665 {
 666         const struct v4l2_dv_preset *p = arg;
 667
 668         pr_cont("preset=%u\n", p->preset);
 669 }
 670
 671 static void v4l_print_dv_timings(const void *arg, bool write_only)
 672 {
 673         const struct v4l2_dv_timings *p = arg;
 674
 675         switch (p->type) {
 676         case V4L2_DV_BT_656_1120:
 677                 pr_cont("type=bt-656/1120, interlaced=%u, "
 678                         "pixelclock=%llu, "
 679                         "width=%u, height=%u, polarities=0x%x, "
 680                         "hfrontporch=%u, hsync=%u, "
 681                         "hbackporch=%u, vfrontporch=%u, "
 682                         "vsync=%u, vbackporch=%u, "
 683                         "il_vfrontporch=%u, il_vsync=%u, "
 684                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 685                                 p->bt.interlaced, p->bt.pixelclock,
 686                                 p->bt.width, p->bt.height,
 687                                 p->bt.polarities, p->bt.hfrontporch,
 688                                 p->bt.hsync, p->bt.hbackporch,
 689                                 p->bt.vfrontporch, p->bt.vsync,
 690                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 691                                 p->bt.il_vsync, p->bt.il_vbackporch,
 692                                 p->bt.standards, p->bt.flags);
 693                 break;
 694         default:
 695                 pr_cont("type=%d\n", p->type);
 696                 break;
 697         }
 698 }
 699
 700 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 701 {
 702         const struct v4l2_enum_dv_timings *p = arg;
 703
 704         pr_cont("index=%u, ", p->index);
 705         v4l_print_dv_timings(&p->timings, write_only);
 706 }
 707
 708 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_dv_timings_cap *p = arg;
 711
 712         switch (p->type) {
 713         case V4L2_DV_BT_656_1120:
 714                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 715                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 716                         p->bt.min_width, p->bt.max_width,
 717                         p->bt.min_height, p->bt.max_height,
 718                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 719                         p->bt.standards, p->bt.capabilities);
 720                 break;
 721         default:
 722                 pr_cont("type=%u\n", p->type);
 723                 break;
 724         }
 725 }
 726
 727 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 728 {
 729         const struct v4l2_frmsizeenum *p = arg;
 730
 731         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 732                         p->index,
 733                         (p->pixel_format & 0xff),
 734                         (p->pixel_format >>  8) & 0xff,
 735                         (p->pixel_format >> 16) & 0xff,
 736                         (p->pixel_format >> 24) & 0xff,
 737                         p->type);
 738         switch (p->type) {
 739         case V4L2_FRMSIZE_TYPE_DISCRETE:
 740                 pr_cont(" wxh=%ux%u\n",
 741                         p->discrete.width, p->discrete.height);
 742                 break;
 743         case V4L2_FRMSIZE_TYPE_STEPWISE:
 744                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 745                                 p->stepwise.min_width,  p->stepwise.min_height,
 746                                 p->stepwise.step_width, p->stepwise.step_height,
 747                                 p->stepwise.max_width,  p->stepwise.max_height);
 748                 break;
 749         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 750                 /* fall through */
 751         default:
 752                 pr_cont("\n");
 753                 break;
 754         }
 755 }
 756
 757 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 758 {
 759         const struct v4l2_frmivalenum *p = arg;
 760
 761         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 762                         p->index,
 763                         (p->pixel_format & 0xff),
 764                         (p->pixel_format >>  8) & 0xff,
 765                         (p->pixel_format >> 16) & 0xff,
 766                         (p->pixel_format >> 24) & 0xff,
 767                         p->width, p->height, p->type);
 768         switch (p->type) {
 769         case V4L2_FRMIVAL_TYPE_DISCRETE:
 770                 pr_cont(" fps=%d/%d\n",
 771                                 p->discrete.numerator,
 772                                 p->discrete.denominator);
 773                 break;
 774         case V4L2_FRMIVAL_TYPE_STEPWISE:
 775                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 776                                 p->stepwise.min.numerator,
 777                                 p->stepwise.min.denominator,
 778                                 p->stepwise.max.numerator,
 779                                 p->stepwise.max.denominator,
 780                                 p->stepwise.step.numerator,
 781                                 p->stepwise.step.denominator);
 782                 break;
 783         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 784                 /* fall through */
 785         default:
 786                 pr_cont("\n");
 787                 break;
 788         }
 789 }
 790
 791 static void v4l_print_event(const void *arg, bool write_only)
 792 {
 793         const struct v4l2_event *p = arg;
 794         const struct v4l2_event_ctrl *c;
 795
 796         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 797                 "timestamp=%lu.%9.9lu\n",
 798                         p->type, p->pending, p->sequence, p->id,
 799                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 800         switch (p->type) {
 801         case V4L2_EVENT_VSYNC:
 802                 printk(KERN_DEBUG "field=%s\n",
 803                         prt_names(p->u.vsync.field, v4l2_field_names));
 804                 break;
 805         case V4L2_EVENT_CTRL:
 806                 c = &p->u.ctrl;
 807                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 808                         c->changes, c->type);
 809                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 810                         pr_cont("value64=%lld, ", c->value64);
 811                 else
 812                         pr_cont("value=%d, ", c->value);
 813                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 814                                 " default_value=%d\n",
 815                         c->flags, c->minimum, c->maximum,
 816                         c->step, c->default_value);
 817                 break;
 818         case V4L2_EVENT_FRAME_SYNC:
 819                 pr_cont("frame_sequence=%u\n",
 820                         p->u.frame_sync.frame_sequence);
 821                 break;
 822         }
 823 }
 824
 825 static void v4l_print_event_subscription(const void *arg, bool write_only)
 826 {
 827         const struct v4l2_event_subscription *p = arg;
 828
 829         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 830                         p->type, p->id, p->flags);
 831 }
 832
 833 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 834 {
 835         const struct v4l2_sliced_vbi_cap *p = arg;
 836         int i;
 837
 838         pr_cont("type=%s, service_set=0x%08x\n",
 839                         prt_names(p->type, v4l2_type_names), p->service_set);
 840         for (i = 0; i < 24; i++)
 841                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 842                                 p->service_lines[0][i],
 843                                 p->service_lines[1][i]);
 844 }
 845
 846 static void v4l_print_freq_band(const void *arg, bool write_only)
 847 {
 848         const struct v4l2_frequency_band *p = arg;
 849
 850         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 851                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 852                         p->tuner, p->type, p->index,
 853                         p->capability, p->rangelow,
 854                         p->rangehigh, p->modulation);
 855 }
 856
 857 static void v4l_print_u32(const void *arg, bool write_only)
 858 {
 859         pr_cont("value=%u\n", *(const u32 *)arg);
 860 }
 861
 862 static void v4l_print_newline(const void *arg, bool write_only)
 863 {
 864         pr_cont("\n");
 865 }
 866
 867 static void v4l_print_default(const void *arg, bool write_only)
 868 {
 869         pr_cont("driver-specific ioctl\n");
 870 }
 871
 872 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 873 {
 874         __u32 i;
 875
 876         /* zero the reserved fields */
 877         c->reserved[0] = c->reserved[1] = 0;
 878         for (i = 0; i < c->count; i++)
 879                 c->controls[i].reserved2[0] = 0;
 880
 881         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 882            when using extended controls.
 883            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 884            is it allowed for backwards compatibility.
 885          */
 886         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 887                 return 0;
 888         /* Check that all controls are from the same control class. */
 889         for (i = 0; i < c->count; i++) {
 890                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 891                         c->error_idx = i;
 892                         return 0;
 893                 }
 894         }
 895         return 1;
 896 }
 897
 898 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 899 {
 900         struct video_device *vfd = video_devdata(file);
 901         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 902         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 903         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 904         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 905         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 906
 907         if (ops == NULL)
 908                 return -EINVAL;
 909
 910         switch (type) {
 911         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 912                 if (is_vid && is_rx &&
 913                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 914                         return 0;
 915                 break;
 916         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 917                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 918                         return 0;
 919                 break;
 920         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 921                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 922                         return 0;
 923                 break;
 924         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 925                 if (is_vid && is_tx &&
 926                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 930                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 931                         return 0;
 932                 break;
 933         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 934                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 935                         return 0;
 936                 break;
 937         case V4L2_BUF_TYPE_VBI_CAPTURE:
 938                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 939                         return 0;
 940                 break;
 941         case V4L2_BUF_TYPE_VBI_OUTPUT:
 942                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 943                         return 0;
 944                 break;
 945         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 946                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 950                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 951                         return 0;
 952                 break;
 953         default:
 954                 break;
 955         }
 956         return -EINVAL;
 957 }
 958
 959 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 960                                 struct file *file, void *fh, void *arg)
 961 {
 962         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 963
 964         cap->version = LINUX_VERSION_CODE;
 965         return ops->vidioc_querycap(file, fh, cap);
 966 }
 967
 968 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 969                                 struct file *file, void *fh, void *arg)
 970 {
 971         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 972 }
 973
 974 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 975                                 struct file *file, void *fh, void *arg)
 976 {
 977         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 978 }
 979
 980 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 981                                 struct file *file, void *fh, void *arg)
 982 {
 983         struct video_device *vfd;
 984         u32 *p = arg;
 985
 986         if (ops->vidioc_g_priority)
 987                 return ops->vidioc_g_priority(file, fh, arg);
 988         vfd = video_devdata(file);
 989         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 990         return 0;
 991 }
 992
 993 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 994                                 struct file *file, void *fh, void *arg)
 995 {
 996         struct video_device *vfd;
 997         struct v4l2_fh *vfh;
 998         u32 *p = arg;
 999
1000         if (ops->vidioc_s_priority)
1001                 return ops->vidioc_s_priority(file, fh, *p);
1002         vfd = video_devdata(file);
1003         vfh = file->private_data;
1004         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1005 }
1006
1007 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1008                                 struct file *file, void *fh, void *arg)
1009 {
1010         struct video_device *vfd = video_devdata(file);
1011         struct v4l2_input *p = arg;
1012
1013         /*
1014          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
1015          * CAP_STD here based on ioctl handler provided by the
1016          * driver. If the driver doesn't support these
1017          * for a specific input, it must override these flags.
1018          */
1019         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1020                 p->capabilities |= V4L2_IN_CAP_STD;
1021         if (is_valid_ioctl(vfd, VIDIOC_S_DV_PRESET))
1022                 p->capabilities |= V4L2_IN_CAP_PRESETS;
1023         if (is_valid_ioctl(vfd, VIDIOC_S_DV_TIMINGS))
1024                 p->capabilities |= V4L2_IN_CAP_DV_TIMINGS;
1025
1026         return ops->vidioc_enum_input(file, fh, p);
1027 }
1028
1029 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1030                                 struct file *file, void *fh, void *arg)
1031 {
1032         struct video_device *vfd = video_devdata(file);
1033         struct v4l2_output *p = arg;
1034
1035         /*
1036          * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS &
1037          * CAP_STD here based on ioctl handler provided by the
1038          * driver. If the driver doesn't support these
1039          * for a specific output, it must override these flags.
1040          */
1041         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1042                 p->capabilities |= V4L2_OUT_CAP_STD;
1043         if (is_valid_ioctl(vfd, VIDIOC_S_DV_PRESET))
1044                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1045         if (is_valid_ioctl(vfd, VIDIOC_S_DV_TIMINGS))
1046                 p->capabilities |= V4L2_OUT_CAP_DV_TIMINGS;
1047
1048         return ops->vidioc_enum_output(file, fh, p);
1049 }
1050
1051 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1052                                 struct file *file, void *fh, void *arg)
1053 {
1054         struct v4l2_fmtdesc *p = arg;
1055         struct video_device *vfd = video_devdata(file);
1056         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1057         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1058
1059         switch (p->type) {
1060         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1061                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1062                         break;
1063                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1064         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1065                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1066                         break;
1067                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1068         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1069                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1070                         break;
1071                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1072         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1073                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1074                         break;
1075                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1076         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1077                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1078                         break;
1079                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1080         }
1081         return -EINVAL;
1082 }
1083
1084 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1085                                 struct file *file, void *fh, void *arg)
1086 {
1087         struct v4l2_format *p = arg;
1088         struct video_device *vfd = video_devdata(file);
1089         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1090         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1091         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1092
1093         switch (p->type) {
1094         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1095                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1096                         break;
1097                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1098         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1099                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1100                         break;
1101                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1102         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1103                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1104                         break;
1105                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1106         case V4L2_BUF_TYPE_VBI_CAPTURE:
1107                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1108                         break;
1109                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1110         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1111                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1112                         break;
1113                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1114         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1115                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1116                         break;
1117                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1118         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1119                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1120                         break;
1121                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1122         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1123                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1124                         break;
1125                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1126         case V4L2_BUF_TYPE_VBI_OUTPUT:
1127                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1128                         break;
1129                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1130         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1131                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1132                         break;
1133                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1134         }
1135         return -EINVAL;
1136 }
1137
1138 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1139                                 struct file *file, void *fh, void *arg)
1140 {
1141         struct v4l2_format *p = arg;
1142         struct video_device *vfd = video_devdata(file);
1143         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1144         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1145         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1146
1147         switch (p->type) {
1148         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1149                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1150                         break;
1151                 CLEAR_AFTER_FIELD(p, fmt.pix);
1152                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1153         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1154                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1155                         break;
1156                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1157                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1158         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1159                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1160                         break;
1161                 CLEAR_AFTER_FIELD(p, fmt.win);
1162                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1163         case V4L2_BUF_TYPE_VBI_CAPTURE:
1164                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1165                         break;
1166                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1167                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1168         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1169                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1170                         break;
1171                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1172                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1173         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1174                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1175                         break;
1176                 CLEAR_AFTER_FIELD(p, fmt.pix);
1177                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1178         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1179                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1180                         break;
1181                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1182                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1183         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1184                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1185                         break;
1186                 CLEAR_AFTER_FIELD(p, fmt.win);
1187                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1188         case V4L2_BUF_TYPE_VBI_OUTPUT:
1189                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1190                         break;
1191                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1192                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1193         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1194                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1195                         break;
1196                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1197                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1198         }
1199         return -EINVAL;
1200 }
1201
1202 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1203                                 struct file *file, void *fh, void *arg)
1204 {
1205         struct v4l2_format *p = arg;
1206         struct video_device *vfd = video_devdata(file);
1207         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1208         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1209         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1210
1211         switch (p->type) {
1212         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1213                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1214                         break;
1215                 CLEAR_AFTER_FIELD(p, fmt.pix);
1216                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1217         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1218                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1219                         break;
1220                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1221                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1222         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1223                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1224                         break;
1225                 CLEAR_AFTER_FIELD(p, fmt.win);
1226                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1227         case V4L2_BUF_TYPE_VBI_CAPTURE:
1228                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1229                         break;
1230                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1231                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1232         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1233                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1234                         break;
1235                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1236                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1237         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1238                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1239                         break;
1240                 CLEAR_AFTER_FIELD(p, fmt.pix);
1241                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1242         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1243                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1244                         break;
1245                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1246                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1247         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1248                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1249                         break;
1250                 CLEAR_AFTER_FIELD(p, fmt.win);
1251                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1252         case V4L2_BUF_TYPE_VBI_OUTPUT:
1253                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1254                         break;
1255                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1256                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1257         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1258                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1259                         break;
1260                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1261                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1262         }
1263         return -EINVAL;
1264 }
1265
1266 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1267                                 struct file *file, void *fh, void *arg)
1268 {
1269         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1270 }
1271
1272 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1273                                 struct file *file, void *fh, void *arg)
1274 {
1275         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1276 }
1277
1278 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1279                                 struct file *file, void *fh, void *arg)
1280 {
1281         struct video_device *vfd = video_devdata(file);
1282         struct v4l2_tuner *p = arg;
1283         int err;
1284
1285         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1286                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1287         err = ops->vidioc_g_tuner(file, fh, p);
1288         if (!err)
1289                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1290         return err;
1291 }
1292
1293 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1294                                 struct file *file, void *fh, void *arg)
1295 {
1296         struct video_device *vfd = video_devdata(file);
1297         struct v4l2_tuner *p = arg;
1298
1299         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1300                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1301         return ops->vidioc_s_tuner(file, fh, p);
1302 }
1303
1304 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1305                                 struct file *file, void *fh, void *arg)
1306 {
1307         struct v4l2_modulator *p = arg;
1308         int err;
1309
1310         err = ops->vidioc_g_modulator(file, fh, p);
1311         if (!err)
1312                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1313         return err;
1314 }
1315
1316 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1317                                 struct file *file, void *fh, void *arg)
1318 {
1319         struct video_device *vfd = video_devdata(file);
1320         struct v4l2_frequency *p = arg;
1321
1322         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1323                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1324         return ops->vidioc_g_frequency(file, fh, p);
1325 }
1326
1327 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1328                                 struct file *file, void *fh, void *arg)
1329 {
1330         struct video_device *vfd = video_devdata(file);
1331         const struct v4l2_frequency *p = arg;
1332         enum v4l2_tuner_type type;
1333
1334         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1335                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1336         if (p->type != type)
1337                 return -EINVAL;
1338         return ops->vidioc_s_frequency(file, fh, p);
1339 }
1340
1341 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1342                                 struct file *file, void *fh, void *arg)
1343 {
1344         struct video_device *vfd = video_devdata(file);
1345         struct v4l2_standard *p = arg;
1346         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1347         unsigned int index = p->index, i, j = 0;
1348         const char *descr = "";
1349
1350         /* Return -ENODATA if the tvnorms for the current input
1351            or output is 0, meaning that it doesn't support this API. */
1352         if (id == 0)
1353                 return -ENODATA;
1354
1355         /* Return norm array in a canonical way */
1356         for (i = 0; i <= index && id; i++) {
1357                 /* last std value in the standards array is 0, so this
1358                    while always ends there since (id & 0) == 0. */
1359                 while ((id & standards[j].std) != standards[j].std)
1360                         j++;
1361                 curr_id = standards[j].std;
1362                 descr = standards[j].descr;
1363                 j++;
1364                 if (curr_id == 0)
1365                         break;
1366                 if (curr_id != V4L2_STD_PAL &&
1367                                 curr_id != V4L2_STD_SECAM &&
1368                                 curr_id != V4L2_STD_NTSC)
1369                         id &= ~curr_id;
1370         }
1371         if (i <= index)
1372                 return -EINVAL;
1373
1374         v4l2_video_std_construct(p, curr_id, descr);
1375         return 0;
1376 }
1377
1378 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1379                                 struct file *file, void *fh, void *arg)
1380 {
1381         struct video_device *vfd = video_devdata(file);
1382         v4l2_std_id *id = arg;
1383
1384         /* Calls the specific handler */
1385         if (ops->vidioc_g_std)
1386                 return ops->vidioc_g_std(file, fh, arg);
1387         if (vfd->current_norm) {
1388                 *id = vfd->current_norm;
1389                 return 0;
1390         }
1391         return -ENOTTY;
1392 }
1393
1394 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1395                                 struct file *file, void *fh, void *arg)
1396 {
1397         struct video_device *vfd = video_devdata(file);
1398         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1399         int ret;
1400
1401         norm = id & vfd->tvnorms;
1402         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1403                 return -EINVAL;
1404
1405         /* Calls the specific handler */
1406         ret = ops->vidioc_s_std(file, fh, norm);
1407
1408         /* Updates standard information */
1409         if (ret >= 0)
1410                 vfd->current_norm = norm;
1411         return ret;
1412 }
1413
1414 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1415                                 struct file *file, void *fh, void *arg)
1416 {
1417         struct video_device *vfd = video_devdata(file);
1418         v4l2_std_id *p = arg;
1419
1420         /*
1421          * If nothing detected, it should return all supported
1422          * standard.
1423          * Drivers just need to mask the std argument, in order
1424          * to remove the standards that don't apply from the mask.
1425          * This means that tuners, audio and video decoders can join
1426          * their efforts to improve the standards detection.
1427          */
1428         *p = vfd->tvnorms;
1429         return ops->vidioc_querystd(file, fh, arg);
1430 }
1431
1432 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1433                                 struct file *file, void *fh, void *arg)
1434 {
1435         struct video_device *vfd = video_devdata(file);
1436         struct v4l2_hw_freq_seek *p = arg;
1437         enum v4l2_tuner_type type;
1438
1439         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1440                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1441         if (p->type != type)
1442                 return -EINVAL;
1443         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1444 }
1445
1446 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1447                                 struct file *file, void *fh, void *arg)
1448 {
1449         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1450 }
1451
1452 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1453                                 struct file *file, void *fh, void *arg)
1454 {
1455         struct v4l2_requestbuffers *p = arg;
1456         int ret = check_fmt(file, p->type);
1457
1458         if (ret)
1459                 return ret;
1460
1461         CLEAR_AFTER_FIELD(p, memory);
1462
1463         return ops->vidioc_reqbufs(file, fh, p);
1464 }
1465
1466 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1467                                 struct file *file, void *fh, void *arg)
1468 {
1469         struct v4l2_buffer *p = arg;
1470         int ret = check_fmt(file, p->type);
1471
1472         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1473 }
1474
1475 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1476                                 struct file *file, void *fh, void *arg)
1477 {
1478         struct v4l2_buffer *p = arg;
1479         int ret = check_fmt(file, p->type);
1480
1481         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1482 }
1483
1484 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1485                                 struct file *file, void *fh, void *arg)
1486 {
1487         struct v4l2_buffer *p = arg;
1488         int ret = check_fmt(file, p->type);
1489
1490         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1491 }
1492
1493 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1494                                 struct file *file, void *fh, void *arg)
1495 {
1496         struct v4l2_create_buffers *create = arg;
1497         int ret = check_fmt(file, create->format.type);
1498
1499         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1500 }
1501
1502 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1503                                 struct file *file, void *fh, void *arg)
1504 {
1505         struct v4l2_buffer *b = arg;
1506         int ret = check_fmt(file, b->type);
1507
1508         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1509 }
1510
1511 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1512                                 struct file *file, void *fh, void *arg)
1513 {
1514         struct video_device *vfd = video_devdata(file);
1515         struct v4l2_streamparm *p = arg;
1516         v4l2_std_id std;
1517         int ret = check_fmt(file, p->type);
1518
1519         if (ret)
1520                 return ret;
1521         if (ops->vidioc_g_parm)
1522                 return ops->vidioc_g_parm(file, fh, p);
1523         std = vfd->current_norm;
1524         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1525             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1526                 return -EINVAL;
1527         p->parm.capture.readbuffers = 2;
1528         if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std)
1529                 ret = ops->vidioc_g_std(file, fh, &std);
1530         if (ret == 0)
1531                 v4l2_video_std_frame_period(std,
1532                             &p->parm.capture.timeperframe);
1533         return ret;
1534 }
1535
1536 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1537                                 struct file *file, void *fh, void *arg)
1538 {
1539         struct v4l2_streamparm *p = arg;
1540         int ret = check_fmt(file, p->type);
1541
1542         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1543 }
1544
1545 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1546                                 struct file *file, void *fh, void *arg)
1547 {
1548         struct video_device *vfd = video_devdata(file);
1549         struct v4l2_queryctrl *p = arg;
1550         struct v4l2_fh *vfh =
1551                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1552
1553         if (vfh && vfh->ctrl_handler)
1554                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1555         if (vfd->ctrl_handler)
1556                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1557         if (ops->vidioc_queryctrl)
1558                 return ops->vidioc_queryctrl(file, fh, p);
1559         return -ENOTTY;
1560 }
1561
1562 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1563                                 struct file *file, void *fh, void *arg)
1564 {
1565         struct video_device *vfd = video_devdata(file);
1566         struct v4l2_querymenu *p = arg;
1567         struct v4l2_fh *vfh =
1568                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1569
1570         if (vfh && vfh->ctrl_handler)
1571                 return v4l2_querymenu(vfh->ctrl_handler, p);
1572         if (vfd->ctrl_handler)
1573                 return v4l2_querymenu(vfd->ctrl_handler, p);
1574         if (ops->vidioc_querymenu)
1575                 return ops->vidioc_querymenu(file, fh, p);
1576         return -ENOTTY;
1577 }
1578
1579 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1580                                 struct file *file, void *fh, void *arg)
1581 {
1582         struct video_device *vfd = video_devdata(file);
1583         struct v4l2_control *p = arg;
1584         struct v4l2_fh *vfh =
1585                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1586         struct v4l2_ext_controls ctrls;
1587         struct v4l2_ext_control ctrl;
1588
1589         if (vfh && vfh->ctrl_handler)
1590                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1591         if (vfd->ctrl_handler)
1592                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1593         if (ops->vidioc_g_ctrl)
1594                 return ops->vidioc_g_ctrl(file, fh, p);
1595         if (ops->vidioc_g_ext_ctrls == NULL)
1596                 return -ENOTTY;
1597
1598         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1599         ctrls.count = 1;
1600         ctrls.controls = &ctrl;
1601         ctrl.id = p->id;
1602         ctrl.value = p->value;
1603         if (check_ext_ctrls(&ctrls, 1)) {
1604                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1605
1606                 if (ret == 0)
1607                         p->value = ctrl.value;
1608                 return ret;
1609         }
1610         return -EINVAL;
1611 }
1612
1613 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1614                                 struct file *file, void *fh, void *arg)
1615 {
1616         struct video_device *vfd = video_devdata(file);
1617         struct v4l2_control *p = arg;
1618         struct v4l2_fh *vfh =
1619                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1620         struct v4l2_ext_controls ctrls;
1621         struct v4l2_ext_control ctrl;
1622
1623         if (vfh && vfh->ctrl_handler)
1624                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1625         if (vfd->ctrl_handler)
1626                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1627         if (ops->vidioc_s_ctrl)
1628                 return ops->vidioc_s_ctrl(file, fh, p);
1629         if (ops->vidioc_s_ext_ctrls == NULL)
1630                 return -ENOTTY;
1631
1632         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1633         ctrls.count = 1;
1634         ctrls.controls = &ctrl;
1635         ctrl.id = p->id;
1636         ctrl.value = p->value;
1637         if (check_ext_ctrls(&ctrls, 1))
1638                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1639         return -EINVAL;
1640 }
1641
1642 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1643                                 struct file *file, void *fh, void *arg)
1644 {
1645         struct video_device *vfd = video_devdata(file);
1646         struct v4l2_ext_controls *p = arg;
1647         struct v4l2_fh *vfh =
1648                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1649
1650         p->error_idx = p->count;
1651         if (vfh && vfh->ctrl_handler)
1652                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1653         if (vfd->ctrl_handler)
1654                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1655         if (ops->vidioc_g_ext_ctrls == NULL)
1656                 return -ENOTTY;
1657         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1658                                         -EINVAL;
1659 }
1660
1661 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1662                                 struct file *file, void *fh, void *arg)
1663 {
1664         struct video_device *vfd = video_devdata(file);
1665         struct v4l2_ext_controls *p = arg;
1666         struct v4l2_fh *vfh =
1667                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1668
1669         p->error_idx = p->count;
1670         if (vfh && vfh->ctrl_handler)
1671                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1672         if (vfd->ctrl_handler)
1673                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1674         if (ops->vidioc_s_ext_ctrls == NULL)
1675                 return -ENOTTY;
1676         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1677                                         -EINVAL;
1678 }
1679
1680 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1681                                 struct file *file, void *fh, void *arg)
1682 {
1683         struct video_device *vfd = video_devdata(file);
1684         struct v4l2_ext_controls *p = arg;
1685         struct v4l2_fh *vfh =
1686                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1687
1688         p->error_idx = p->count;
1689         if (vfh && vfh->ctrl_handler)
1690                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1691         if (vfd->ctrl_handler)
1692                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1693         if (ops->vidioc_try_ext_ctrls == NULL)
1694                 return -ENOTTY;
1695         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1696                                         -EINVAL;
1697 }
1698
1699 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1700                                 struct file *file, void *fh, void *arg)
1701 {
1702         struct v4l2_crop *p = arg;
1703         struct v4l2_selection s = {
1704                 .type = p->type,
1705         };
1706         int ret;
1707
1708         if (ops->vidioc_g_crop)
1709                 return ops->vidioc_g_crop(file, fh, p);
1710         /* simulate capture crop using selection api */
1711
1712         /* crop means compose for output devices */
1713         if (V4L2_TYPE_IS_OUTPUT(p->type))
1714                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1715         else
1716                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1717
1718         ret = ops->vidioc_g_selection(file, fh, &s);
1719
1720         /* copying results to old structure on success */
1721         if (!ret)
1722                 p->c = s.r;
1723         return ret;
1724 }
1725
1726 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1727                                 struct file *file, void *fh, void *arg)
1728 {
1729         struct v4l2_crop *p = arg;
1730         struct v4l2_selection s = {
1731                 .type = p->type,
1732                 .r = p->c,
1733         };
1734
1735         if (ops->vidioc_s_crop)
1736                 return ops->vidioc_s_crop(file, fh, p);
1737         /* simulate capture crop using selection api */
1738
1739         /* crop means compose for output devices */
1740         if (V4L2_TYPE_IS_OUTPUT(p->type))
1741                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1742         else
1743                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1744
1745         return ops->vidioc_s_selection(file, fh, &s);
1746 }
1747
1748 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1749                                 struct file *file, void *fh, void *arg)
1750 {
1751         struct v4l2_cropcap *p = arg;
1752         struct v4l2_selection s = { .type = p->type };
1753         int ret;
1754
1755         if (ops->vidioc_cropcap)
1756                 return ops->vidioc_cropcap(file, fh, p);
1757
1758         /* obtaining bounds */
1759         if (V4L2_TYPE_IS_OUTPUT(p->type))
1760                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1761         else
1762                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1763
1764         ret = ops->vidioc_g_selection(file, fh, &s);
1765         if (ret)
1766                 return ret;
1767         p->bounds = s.r;
1768
1769         /* obtaining defrect */
1770         if (V4L2_TYPE_IS_OUTPUT(p->type))
1771                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1772         else
1773                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1774
1775         ret = ops->vidioc_g_selection(file, fh, &s);
1776         if (ret)
1777                 return ret;
1778         p->defrect = s.r;
1779
1780         /* setting trivial pixelaspect */
1781         p->pixelaspect.numerator = 1;
1782         p->pixelaspect.denominator = 1;
1783         return 0;
1784 }
1785
1786 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1787                                 struct file *file, void *fh, void *arg)
1788 {
1789         struct video_device *vfd = video_devdata(file);
1790         int ret;
1791
1792         if (vfd->v4l2_dev)
1793                 pr_info("%s: =================  START STATUS  =================\n",
1794                         vfd->v4l2_dev->name);
1795         ret = ops->vidioc_log_status(file, fh);
1796         if (vfd->v4l2_dev)
1797                 pr_info("%s: ==================  END STATUS  ==================\n",
1798                         vfd->v4l2_dev->name);
1799         return ret;
1800 }
1801
1802 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1803                                 struct file *file, void *fh, void *arg)
1804 {
1805 #ifdef CONFIG_VIDEO_ADV_DEBUG
1806         struct v4l2_dbg_register *p = arg;
1807
1808         if (!capable(CAP_SYS_ADMIN))
1809                 return -EPERM;
1810         return ops->vidioc_g_register(file, fh, p);
1811 #else
1812         return -ENOTTY;
1813 #endif
1814 }
1815
1816 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1817                                 struct file *file, void *fh, void *arg)
1818 {
1819 #ifdef CONFIG_VIDEO_ADV_DEBUG
1820         const struct v4l2_dbg_register *p = arg;
1821
1822         if (!capable(CAP_SYS_ADMIN))
1823                 return -EPERM;
1824         return ops->vidioc_s_register(file, fh, p);
1825 #else
1826         return -ENOTTY;
1827 #endif
1828 }
1829
1830 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1831                                 struct file *file, void *fh, void *arg)
1832 {
1833         struct v4l2_dbg_chip_ident *p = arg;
1834
1835         p->ident = V4L2_IDENT_NONE;
1836         p->revision = 0;
1837         return ops->vidioc_g_chip_ident(file, fh, p);
1838 }
1839
1840 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1841                                 struct file *file, void *fh, void *arg)
1842 {
1843         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1844 }
1845
1846 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1847                                 struct file *file, void *fh, void *arg)
1848 {
1849         return ops->vidioc_subscribe_event(fh, arg);
1850 }
1851
1852 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1853                                 struct file *file, void *fh, void *arg)
1854 {
1855         return ops->vidioc_unsubscribe_event(fh, arg);
1856 }
1857
1858 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1859                                 struct file *file, void *fh, void *arg)
1860 {
1861         struct v4l2_sliced_vbi_cap *p = arg;
1862         int ret = check_fmt(file, p->type);
1863
1864         if (ret)
1865                 return ret;
1866
1867         /* Clear up to type, everything after type is zeroed already */
1868         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1869
1870         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1871 }
1872
1873 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1874                                 struct file *file, void *fh, void *arg)
1875 {
1876         struct video_device *vfd = video_devdata(file);
1877         struct v4l2_frequency_band *p = arg;
1878         enum v4l2_tuner_type type;
1879         int err;
1880
1881         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1882                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1883
1884         if (type != p->type)
1885                 return -EINVAL;
1886         if (ops->vidioc_enum_freq_bands)
1887                 return ops->vidioc_enum_freq_bands(file, fh, p);
1888         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1889                 struct v4l2_tuner t = {
1890                         .index = p->tuner,
1891                         .type = type,
1892                 };
1893
1894                 if (p->index)
1895                         return -EINVAL;
1896                 err = ops->vidioc_g_tuner(file, fh, &t);
1897                 if (err)
1898                         return err;
1899                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1900                 p->rangelow = t.rangelow;
1901                 p->rangehigh = t.rangehigh;
1902                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1903                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1904                 return 0;
1905         }
1906         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1907                 struct v4l2_modulator m = {
1908                         .index = p->tuner,
1909                 };
1910
1911                 if (type != V4L2_TUNER_RADIO)
1912                         return -EINVAL;
1913                 if (p->index)
1914                         return -EINVAL;
1915                 err = ops->vidioc_g_modulator(file, fh, &m);
1916                 if (err)
1917                         return err;
1918                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1919                 p->rangelow = m.rangelow;
1920                 p->rangehigh = m.rangehigh;
1921                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1922                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1923                 return 0;
1924         }
1925         return -ENOTTY;
1926 }
1927
1928 struct v4l2_ioctl_info {
1929         unsigned int ioctl;
1930         u32 flags;
1931         const char * const name;
1932         union {
1933                 u32 offset;
1934                 int (*func)(const struct v4l2_ioctl_ops *ops,
1935                                 struct file *file, void *fh, void *p);
1936         } u;
1937         void (*debug)(const void *arg, bool write_only);
1938 };
1939
1940 /* This control needs a priority check */
1941 #define INFO_FL_PRIO    (1 << 0)
1942 /* This control can be valid if the filehandle passes a control handler. */
1943 #define INFO_FL_CTRL    (1 << 1)
1944 /* This is a standard ioctl, no need for special code */
1945 #define INFO_FL_STD     (1 << 2)
1946 /* This is ioctl has its own function */
1947 #define INFO_FL_FUNC    (1 << 3)
1948 /* Queuing ioctl */
1949 #define INFO_FL_QUEUE   (1 << 4)
1950 /* Zero struct from after the field to the end */
1951 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1952         ((offsetof(struct v4l2_struct, field) +                 \
1953           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1954 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1955
1956 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1957         [_IOC_NR(_ioctl)] = {                                           \
1958                 .ioctl = _ioctl,                                        \
1959                 .flags = _flags | INFO_FL_STD,                          \
1960                 .name = #_ioctl,                                        \
1961                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1962                 .debug = _debug,                                        \
1963         }
1964
1965 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1966         [_IOC_NR(_ioctl)] = {                                           \
1967                 .ioctl = _ioctl,                                        \
1968                 .flags = _flags | INFO_FL_FUNC,                         \
1969                 .name = #_ioctl,                                        \
1970                 .u.func = _func,                                        \
1971                 .debug = _debug,                                        \
1972         }
1973
1974 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1975         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1976         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1977         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1978         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1979         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1980         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1981         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1982         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1983         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
1984         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1985         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
1986         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1987         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1988         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1989         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1990         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1991         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1992         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1993         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1994         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1995         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1996         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1997         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1998         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1999         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2000         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2001         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2002         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2003         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2004         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2005         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2006         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2007         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2008         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2009         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2010         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2011         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2012         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2013         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2014         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2015         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2016         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2017         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2018         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2019         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2020         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2021         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2022         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2023         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2024         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2025         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2026         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2027         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)),
2028         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2029         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2030         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2031         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2032         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2033         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2034         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2035         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2036         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2037         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2038         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2039         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2040         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2041         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2042         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2043         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
2044         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
2045         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
2046         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
2047         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2048         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2049         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2050         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2051         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2052         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2053         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2054         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2055         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2056         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2057         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2058 };
2059 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2060
2061 bool v4l2_is_known_ioctl(unsigned int cmd)
2062 {
2063         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2064                 return false;
2065         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2066 }
2067
2068 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2069 {
2070         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2071                 return vdev->lock;
2072         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2073                 return NULL;
2074         if (vdev->queue && vdev->queue->lock &&
2075                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2076                 return vdev->queue->lock;
2077         return vdev->lock;
2078 }
2079
2080 /* Common ioctl debug function. This function can be used by
2081    external ioctl messages as well as internal V4L ioctl */
2082 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2083 {
2084         const char *dir, *type;
2085
2086         if (prefix)
2087                 printk(KERN_DEBUG "%s: ", prefix);
2088
2089         switch (_IOC_TYPE(cmd)) {
2090         case 'd':
2091                 type = "v4l2_int";
2092                 break;
2093         case 'V':
2094                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2095                         type = "v4l2";
2096                         break;
2097                 }
2098                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2099                 return;
2100         default:
2101                 type = "unknown";
2102                 break;
2103         }
2104
2105         switch (_IOC_DIR(cmd)) {
2106         case _IOC_NONE:              dir = "--"; break;
2107         case _IOC_READ:              dir = "r-"; break;
2108         case _IOC_WRITE:             dir = "-w"; break;
2109         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2110         default:                     dir = "*ERR*"; break;
2111         }
2112         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2113                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2114 }
2115 EXPORT_SYMBOL(v4l_printk_ioctl);
2116
2117 static long __video_do_ioctl(struct file *file,
2118                 unsigned int cmd, void *arg)
2119 {
2120         struct video_device *vfd = video_devdata(file);
2121         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2122         bool write_only = false;
2123         struct v4l2_ioctl_info default_info;
2124         const struct v4l2_ioctl_info *info;
2125         void *fh = file->private_data;
2126         struct v4l2_fh *vfh = NULL;
2127         int use_fh_prio = 0;
2128         int debug = vfd->debug;
2129         long ret = -ENOTTY;
2130
2131         if (ops == NULL) {
2132                 pr_warn("%s: has no ioctl_ops.\n",
2133                                 video_device_node_name(vfd));
2134                 return ret;
2135         }
2136
2137         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2138                 vfh = file->private_data;
2139                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2140         }
2141
2142         if (v4l2_is_known_ioctl(cmd)) {
2143                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2144
2145                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2146                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2147                         goto done;
2148
2149                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2150                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2151                         if (ret)
2152                                 goto done;
2153                 }
2154         } else {
2155                 default_info.ioctl = cmd;
2156                 default_info.flags = 0;
2157                 default_info.debug = v4l_print_default;
2158                 info = &default_info;
2159         }
2160
2161         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2162         if (info->flags & INFO_FL_STD) {
2163                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2164                 const void *p = vfd->ioctl_ops;
2165                 const vidioc_op *vidioc = p + info->u.offset;
2166
2167                 ret = (*vidioc)(file, fh, arg);
2168         } else if (info->flags & INFO_FL_FUNC) {
2169                 ret = info->u.func(ops, file, fh, arg);
2170         } else if (!ops->vidioc_default) {
2171                 ret = -ENOTTY;
2172         } else {
2173                 ret = ops->vidioc_default(file, fh,
2174                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2175                         cmd, arg);
2176         }
2177
2178 done:
2179         if (debug) {
2180                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2181                 if (ret < 0)
2182                         pr_cont(": error %ld", ret);
2183                 if (debug == V4L2_DEBUG_IOCTL)
2184                         pr_cont("\n");
2185                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2186                         info->debug(arg, write_only);
2187                 else {
2188                         pr_cont(": ");
2189                         info->debug(arg, write_only);
2190                 }
2191         }
2192
2193         return ret;
2194 }
2195
2196 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2197                             void * __user *user_ptr, void ***kernel_ptr)
2198 {
2199         int ret = 0;
2200
2201         switch (cmd) {
2202         case VIDIOC_PREPARE_BUF:
2203         case VIDIOC_QUERYBUF:
2204         case VIDIOC_QBUF:
2205         case VIDIOC_DQBUF: {
2206                 struct v4l2_buffer *buf = parg;
2207
2208                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2209                         if (buf->length > VIDEO_MAX_PLANES) {
2210                                 ret = -EINVAL;
2211                                 break;
2212                         }
2213                         *user_ptr = (void __user *)buf->m.planes;
2214                         *kernel_ptr = (void *)&buf->m.planes;
2215                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2216                         ret = 1;
2217                 }
2218                 break;
2219         }
2220
2221         case VIDIOC_SUBDEV_G_EDID:
2222         case VIDIOC_SUBDEV_S_EDID: {
2223                 struct v4l2_subdev_edid *edid = parg;
2224
2225                 if (edid->blocks) {
2226                         if (edid->blocks > 256) {
2227                                 ret = -EINVAL;
2228                                 break;
2229                         }
2230                         *user_ptr = (void __user *)edid->edid;
2231                         *kernel_ptr = (void *)&edid->edid;
2232                         *array_size = edid->blocks * 128;
2233                         ret = 1;
2234                 }
2235                 break;
2236         }
2237
2238         case VIDIOC_S_EXT_CTRLS:
2239         case VIDIOC_G_EXT_CTRLS:
2240         case VIDIOC_TRY_EXT_CTRLS: {
2241                 struct v4l2_ext_controls *ctrls = parg;
2242
2243                 if (ctrls->count != 0) {
2244                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2245                                 ret = -EINVAL;
2246                                 break;
2247                         }
2248                         *user_ptr = (void __user *)ctrls->controls;
2249                         *kernel_ptr = (void *)&ctrls->controls;
2250                         *array_size = sizeof(struct v4l2_ext_control)
2251                                     * ctrls->count;
2252                         ret = 1;
2253                 }
2254                 break;
2255         }
2256         }
2257
2258         return ret;
2259 }
2260
2261 long
2262 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2263                v4l2_kioctl func)
2264 {
2265         char    sbuf[128];
2266         void    *mbuf = NULL;
2267         void    *parg = (void *)arg;
2268         long    err  = -EINVAL;
2269         bool    has_array_args;
2270         size_t  array_size = 0;
2271         void __user *user_ptr = NULL;
2272         void    **kernel_ptr = NULL;
2273
2274         /*  Copy arguments into temp kernel buffer  */
2275         if (_IOC_DIR(cmd) != _IOC_NONE) {
2276                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2277                         parg = sbuf;
2278                 } else {
2279                         /* too big to allocate from stack */
2280                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2281                         if (NULL == mbuf)
2282                                 return -ENOMEM;
2283                         parg = mbuf;
2284                 }
2285
2286                 err = -EFAULT;
2287                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2288                         unsigned int n = _IOC_SIZE(cmd);
2289
2290                         /*
2291                          * In some cases, only a few fields are used as input,
2292                          * i.e. when the app sets "index" and then the driver
2293                          * fills in the rest of the structure for the thing
2294                          * with that index.  We only need to copy up the first
2295                          * non-input field.
2296                          */
2297                         if (v4l2_is_known_ioctl(cmd)) {
2298                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2299                                 if (flags & INFO_FL_CLEAR_MASK)
2300                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2301                         }
2302
2303                         if (copy_from_user(parg, (void __user *)arg, n))
2304                                 goto out;
2305
2306                         /* zero out anything we don't copy from userspace */
2307                         if (n < _IOC_SIZE(cmd))
2308                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2309                 } else {
2310                         /* read-only ioctl */
2311                         memset(parg, 0, _IOC_SIZE(cmd));
2312                 }
2313         }
2314
2315         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2316         if (err < 0)
2317                 goto out;
2318         has_array_args = err;
2319
2320         if (has_array_args) {
2321                 /*
2322                  * When adding new types of array args, make sure that the
2323                  * parent argument to ioctl (which contains the pointer to the
2324                  * array) fits into sbuf (so that mbuf will still remain
2325                  * unused up to here).
2326                  */
2327                 mbuf = kmalloc(array_size, GFP_KERNEL);
2328                 err = -ENOMEM;
2329                 if (NULL == mbuf)
2330                         goto out_array_args;
2331                 err = -EFAULT;
2332                 if (copy_from_user(mbuf, user_ptr, array_size))
2333                         goto out_array_args;
2334                 *kernel_ptr = mbuf;
2335         }
2336
2337         /* Handles IOCTL */
2338         err = func(file, cmd, parg);
2339         if (err == -ENOIOCTLCMD)
2340                 err = -ENOTTY;
2341
2342         if (has_array_args) {
2343                 *kernel_ptr = user_ptr;
2344                 if (copy_to_user(user_ptr, mbuf, array_size))
2345                         err = -EFAULT;
2346                 goto out_array_args;
2347         }
2348         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2349            results that must be returned. */
2350         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2351                 goto out;
2352
2353 out_array_args:
2354         /*  Copy results into user buffer  */
2355         switch (_IOC_DIR(cmd)) {
2356         case _IOC_READ:
2357         case (_IOC_WRITE | _IOC_READ):
2358                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2359                         err = -EFAULT;
2360                 break;
2361         }
2362
2363 out:
2364         kfree(mbuf);
2365         return err;
2366 }
2367 EXPORT_SYMBOL(video_usercopy);
2368
2369 long video_ioctl2(struct file *file,
2370                unsigned int cmd, unsigned long arg)
2371 {
2372         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2373 }
2374 EXPORT_SYMBOL(video_ioctl2);