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/videobuf2-core.h>
  30
  31 #define CREATE_TRACE_POINTS
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparations. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 146         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 147         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 148         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 149         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 150         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 151         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 153         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 154         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 155 };
 156 EXPORT_SYMBOL(v4l2_type_names);
 157
 158 static const char *v4l2_memory_names[] = {
 159         [V4L2_MEMORY_MMAP]    = "mmap",
 160         [V4L2_MEMORY_USERPTR] = "userptr",
 161         [V4L2_MEMORY_OVERLAY] = "overlay",
 162         [V4L2_MEMORY_DMABUF] = "dmabuf",
 163 };
 164
 165 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 166
 167 /* ------------------------------------------------------------------ */
 168 /* debug help functions                                               */
 169
 170 static void v4l_print_querycap(const void *arg, bool write_only)
 171 {
 172         const struct v4l2_capability *p = arg;
 173
 174         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 175                 "capabilities=0x%08x, device_caps=0x%08x\n",
 176                 (int)sizeof(p->driver), p->driver,
 177                 (int)sizeof(p->card), p->card,
 178                 (int)sizeof(p->bus_info), p->bus_info,
 179                 p->version, p->capabilities, p->device_caps);
 180 }
 181
 182 static void v4l_print_enuminput(const void *arg, bool write_only)
 183 {
 184         const struct v4l2_input *p = arg;
 185
 186         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 187                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 188                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 189                 p->tuner, (unsigned long long)p->std, p->status,
 190                 p->capabilities);
 191 }
 192
 193 static void v4l_print_enumoutput(const void *arg, bool write_only)
 194 {
 195         const struct v4l2_output *p = arg;
 196
 197         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 198                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 199                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 200                 p->modulator, (unsigned long long)p->std, p->capabilities);
 201 }
 202
 203 static void v4l_print_audio(const void *arg, bool write_only)
 204 {
 205         const struct v4l2_audio *p = arg;
 206
 207         if (write_only)
 208                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 209         else
 210                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 211                         p->index, (int)sizeof(p->name), p->name,
 212                         p->capability, p->mode);
 213 }
 214
 215 static void v4l_print_audioout(const void *arg, bool write_only)
 216 {
 217         const struct v4l2_audioout *p = arg;
 218
 219         if (write_only)
 220                 pr_cont("index=%u\n", p->index);
 221         else
 222                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 223                         p->index, (int)sizeof(p->name), p->name,
 224                         p->capability, p->mode);
 225 }
 226
 227 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 228 {
 229         const struct v4l2_fmtdesc *p = arg;
 230
 231         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 232                 p->index, prt_names(p->type, v4l2_type_names),
 233                 p->flags, (p->pixelformat & 0xff),
 234                 (p->pixelformat >>  8) & 0xff,
 235                 (p->pixelformat >> 16) & 0xff,
 236                 (p->pixelformat >> 24) & 0xff,
 237                 (int)sizeof(p->description), p->description);
 238 }
 239
 240 static void v4l_print_format(const void *arg, bool write_only)
 241 {
 242         const struct v4l2_format *p = arg;
 243         const struct v4l2_pix_format *pix;
 244         const struct v4l2_pix_format_mplane *mp;
 245         const struct v4l2_vbi_format *vbi;
 246         const struct v4l2_sliced_vbi_format *sliced;
 247         const struct v4l2_window *win;
 248         unsigned i;
 249
 250         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 251         switch (p->type) {
 252         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 253         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 254                 pix = &p->fmt.pix;
 255                 pr_cont(", width=%u, height=%u, "
 256                         "pixelformat=%c%c%c%c, field=%s, "
 257                         "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 258                         pix->width, pix->height,
 259                         (pix->pixelformat & 0xff),
 260                         (pix->pixelformat >>  8) & 0xff,
 261                         (pix->pixelformat >> 16) & 0xff,
 262                         (pix->pixelformat >> 24) & 0xff,
 263                         prt_names(pix->field, v4l2_field_names),
 264                         pix->bytesperline, pix->sizeimage,
 265                         pix->colorspace);
 266                 break;
 267         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 268         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 269                 mp = &p->fmt.pix_mp;
 270                 pr_cont(", width=%u, height=%u, "
 271                         "format=%c%c%c%c, field=%s, "
 272                         "colorspace=%d, num_planes=%u\n",
 273                         mp->width, mp->height,
 274                         (mp->pixelformat & 0xff),
 275                         (mp->pixelformat >>  8) & 0xff,
 276                         (mp->pixelformat >> 16) & 0xff,
 277                         (mp->pixelformat >> 24) & 0xff,
 278                         prt_names(mp->field, v4l2_field_names),
 279                         mp->colorspace, mp->num_planes);
 280                 for (i = 0; i < mp->num_planes; i++)
 281                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 282                                         mp->plane_fmt[i].bytesperline,
 283                                         mp->plane_fmt[i].sizeimage);
 284                 break;
 285         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 286         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 287                 win = &p->fmt.win;
 288                 /* Note: we can't print the clip list here since the clips
 289                  * pointer is a userspace pointer, not a kernelspace
 290                  * pointer. */
 291                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 292                         win->w.width, win->w.height, win->w.left, win->w.top,
 293                         prt_names(win->field, v4l2_field_names),
 294                         win->chromakey, win->clipcount, win->clips,
 295                         win->bitmap, win->global_alpha);
 296                 break;
 297         case V4L2_BUF_TYPE_VBI_CAPTURE:
 298         case V4L2_BUF_TYPE_VBI_OUTPUT:
 299                 vbi = &p->fmt.vbi;
 300                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 301                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 302                         vbi->sampling_rate, vbi->offset,
 303                         vbi->samples_per_line,
 304                         (vbi->sample_format & 0xff),
 305                         (vbi->sample_format >>  8) & 0xff,
 306                         (vbi->sample_format >> 16) & 0xff,
 307                         (vbi->sample_format >> 24) & 0xff,
 308                         vbi->start[0], vbi->start[1],
 309                         vbi->count[0], vbi->count[1]);
 310                 break;
 311         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 312         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 313                 sliced = &p->fmt.sliced;
 314                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 315                                 sliced->service_set, sliced->io_size);
 316                 for (i = 0; i < 24; i++)
 317                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 318                                 sliced->service_lines[0][i],
 319                                 sliced->service_lines[1][i]);
 320                 break;
 321         }
 322 }
 323
 324 static void v4l_print_framebuffer(const void *arg, bool write_only)
 325 {
 326         const struct v4l2_framebuffer *p = arg;
 327
 328         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 329                 "height=%u, pixelformat=%c%c%c%c, "
 330                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 331                         p->capability, p->flags, p->base,
 332                         p->fmt.width, p->fmt.height,
 333                         (p->fmt.pixelformat & 0xff),
 334                         (p->fmt.pixelformat >>  8) & 0xff,
 335                         (p->fmt.pixelformat >> 16) & 0xff,
 336                         (p->fmt.pixelformat >> 24) & 0xff,
 337                         p->fmt.bytesperline, p->fmt.sizeimage,
 338                         p->fmt.colorspace);
 339 }
 340
 341 static void v4l_print_buftype(const void *arg, bool write_only)
 342 {
 343         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 344 }
 345
 346 static void v4l_print_modulator(const void *arg, bool write_only)
 347 {
 348         const struct v4l2_modulator *p = arg;
 349
 350         if (write_only)
 351                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 352         else
 353                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 354                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 355                         p->index, (int)sizeof(p->name), p->name, p->capability,
 356                         p->rangelow, p->rangehigh, p->txsubchans);
 357 }
 358
 359 static void v4l_print_tuner(const void *arg, bool write_only)
 360 {
 361         const struct v4l2_tuner *p = arg;
 362
 363         if (write_only)
 364                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 365         else
 366                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 367                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 368                         "rxsubchans=0x%x, audmode=%u\n",
 369                         p->index, (int)sizeof(p->name), p->name, p->type,
 370                         p->capability, p->rangelow,
 371                         p->rangehigh, p->signal, p->afc,
 372                         p->rxsubchans, p->audmode);
 373 }
 374
 375 static void v4l_print_frequency(const void *arg, bool write_only)
 376 {
 377         const struct v4l2_frequency *p = arg;
 378
 379         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 380                                 p->tuner, p->type, p->frequency);
 381 }
 382
 383 static void v4l_print_standard(const void *arg, bool write_only)
 384 {
 385         const struct v4l2_standard *p = arg;
 386
 387         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 388                 "framelines=%u\n", p->index,
 389                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 390                 p->frameperiod.numerator,
 391                 p->frameperiod.denominator,
 392                 p->framelines);
 393 }
 394
 395 static void v4l_print_std(const void *arg, bool write_only)
 396 {
 397         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 398 }
 399
 400 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 401 {
 402         const struct v4l2_hw_freq_seek *p = arg;
 403
 404         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 405                 "rangelow=%u, rangehigh=%u\n",
 406                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 407                 p->rangelow, p->rangehigh);
 408 }
 409
 410 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 411 {
 412         const struct v4l2_requestbuffers *p = arg;
 413
 414         pr_cont("count=%d, type=%s, memory=%s\n",
 415                 p->count,
 416                 prt_names(p->type, v4l2_type_names),
 417                 prt_names(p->memory, v4l2_memory_names));
 418 }
 419
 420 static void v4l_print_buffer(const void *arg, bool write_only)
 421 {
 422         const struct v4l2_buffer *p = arg;
 423         const struct v4l2_timecode *tc = &p->timecode;
 424         const struct v4l2_plane *plane;
 425         int i;
 426
 427         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 428                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 429                         p->timestamp.tv_sec / 3600,
 430                         (int)(p->timestamp.tv_sec / 60) % 60,
 431                         (int)(p->timestamp.tv_sec % 60),
 432                         (long)p->timestamp.tv_usec,
 433                         p->index,
 434                         prt_names(p->type, v4l2_type_names),
 435                         p->flags, prt_names(p->field, v4l2_field_names),
 436                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 437
 438         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 439                 pr_cont("\n");
 440                 for (i = 0; i < p->length; ++i) {
 441                         plane = &p->m.planes[i];
 442                         printk(KERN_DEBUG
 443                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 444                                 "offset/userptr=0x%lx, length=%d\n",
 445                                 i, plane->bytesused, plane->data_offset,
 446                                 plane->m.userptr, plane->length);
 447                 }
 448         } else {
 449                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 450                         p->bytesused, p->m.userptr, p->length);
 451         }
 452
 453         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 454                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 455                         tc->hours, tc->minutes, tc->seconds,
 456                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 457 }
 458
 459 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 460 {
 461         const struct v4l2_exportbuffer *p = arg;
 462
 463         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 464                 p->fd, prt_names(p->type, v4l2_type_names),
 465                 p->index, p->plane, p->flags);
 466 }
 467
 468 static void v4l_print_create_buffers(const void *arg, bool write_only)
 469 {
 470         const struct v4l2_create_buffers *p = arg;
 471
 472         pr_cont("index=%d, count=%d, memory=%s, ",
 473                         p->index, p->count,
 474                         prt_names(p->memory, v4l2_memory_names));
 475         v4l_print_format(&p->format, write_only);
 476 }
 477
 478 static void v4l_print_streamparm(const void *arg, bool write_only)
 479 {
 480         const struct v4l2_streamparm *p = arg;
 481
 482         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 483
 484         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 485             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 486                 const struct v4l2_captureparm *c = &p->parm.capture;
 487
 488                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 489                         "extendedmode=%d, readbuffers=%d\n",
 490                         c->capability, c->capturemode,
 491                         c->timeperframe.numerator, c->timeperframe.denominator,
 492                         c->extendedmode, c->readbuffers);
 493         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 494                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 495                 const struct v4l2_outputparm *c = &p->parm.output;
 496
 497                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 498                         "extendedmode=%d, writebuffers=%d\n",
 499                         c->capability, c->outputmode,
 500                         c->timeperframe.numerator, c->timeperframe.denominator,
 501                         c->extendedmode, c->writebuffers);
 502         } else {
 503                 pr_cont("\n");
 504         }
 505 }
 506
 507 static void v4l_print_queryctrl(const void *arg, bool write_only)
 508 {
 509         const struct v4l2_queryctrl *p = arg;
 510
 511         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 512                 "step=%d, default=%d, flags=0x%08x\n",
 513                         p->id, p->type, (int)sizeof(p->name), p->name,
 514                         p->minimum, p->maximum,
 515                         p->step, p->default_value, p->flags);
 516 }
 517
 518 static void v4l_print_querymenu(const void *arg, bool write_only)
 519 {
 520         const struct v4l2_querymenu *p = arg;
 521
 522         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 523 }
 524
 525 static void v4l_print_control(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_control *p = arg;
 528
 529         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 530 }
 531
 532 static void v4l_print_ext_controls(const void *arg, bool write_only)
 533 {
 534         const struct v4l2_ext_controls *p = arg;
 535         int i;
 536
 537         pr_cont("class=0x%x, count=%d, error_idx=%d",
 538                         p->ctrl_class, p->count, p->error_idx);
 539         for (i = 0; i < p->count; i++) {
 540                 if (p->controls[i].size)
 541                         pr_cont(", id/val=0x%x/0x%x",
 542                                 p->controls[i].id, p->controls[i].value);
 543                 else
 544                         pr_cont(", id/size=0x%x/%u",
 545                                 p->controls[i].id, p->controls[i].size);
 546         }
 547         pr_cont("\n");
 548 }
 549
 550 static void v4l_print_cropcap(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_cropcap *p = arg;
 553
 554         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 555                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 556                 "pixelaspect %d/%d\n",
 557                 prt_names(p->type, v4l2_type_names),
 558                 p->bounds.width, p->bounds.height,
 559                 p->bounds.left, p->bounds.top,
 560                 p->defrect.width, p->defrect.height,
 561                 p->defrect.left, p->defrect.top,
 562                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 563 }
 564
 565 static void v4l_print_crop(const void *arg, bool write_only)
 566 {
 567         const struct v4l2_crop *p = arg;
 568
 569         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 570                 prt_names(p->type, v4l2_type_names),
 571                 p->c.width, p->c.height,
 572                 p->c.left, p->c.top);
 573 }
 574
 575 static void v4l_print_selection(const void *arg, bool write_only)
 576 {
 577         const struct v4l2_selection *p = arg;
 578
 579         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 580                 prt_names(p->type, v4l2_type_names),
 581                 p->target, p->flags,
 582                 p->r.width, p->r.height, p->r.left, p->r.top);
 583 }
 584
 585 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 586 {
 587         const struct v4l2_jpegcompression *p = arg;
 588
 589         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 590                 "COM_len=%d, jpeg_markers=0x%x\n",
 591                 p->quality, p->APPn, p->APP_len,
 592                 p->COM_len, p->jpeg_markers);
 593 }
 594
 595 static void v4l_print_enc_idx(const void *arg, bool write_only)
 596 {
 597         const struct v4l2_enc_idx *p = arg;
 598
 599         pr_cont("entries=%d, entries_cap=%d\n",
 600                         p->entries, p->entries_cap);
 601 }
 602
 603 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 604 {
 605         const struct v4l2_encoder_cmd *p = arg;
 606
 607         pr_cont("cmd=%d, flags=0x%x\n",
 608                         p->cmd, p->flags);
 609 }
 610
 611 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_decoder_cmd *p = arg;
 614
 615         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 616
 617         if (p->cmd == V4L2_DEC_CMD_START)
 618                 pr_info("speed=%d, format=%u\n",
 619                                 p->start.speed, p->start.format);
 620         else if (p->cmd == V4L2_DEC_CMD_STOP)
 621                 pr_info("pts=%llu\n", p->stop.pts);
 622 }
 623
 624 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 625 {
 626         const struct v4l2_dbg_chip_info *p = arg;
 627
 628         pr_cont("type=%u, ", p->match.type);
 629         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 630                 pr_cont("name=%.*s, ",
 631                                 (int)sizeof(p->match.name), p->match.name);
 632         else
 633                 pr_cont("addr=%u, ", p->match.addr);
 634         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 635 }
 636
 637 static void v4l_print_dbg_register(const void *arg, bool write_only)
 638 {
 639         const struct v4l2_dbg_register *p = arg;
 640
 641         pr_cont("type=%u, ", p->match.type);
 642         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 643                 pr_cont("name=%.*s, ",
 644                                 (int)sizeof(p->match.name), p->match.name);
 645         else
 646                 pr_cont("addr=%u, ", p->match.addr);
 647         pr_cont("reg=0x%llx, val=0x%llx\n",
 648                         p->reg, p->val);
 649 }
 650
 651 static void v4l_print_dv_timings(const void *arg, bool write_only)
 652 {
 653         const struct v4l2_dv_timings *p = arg;
 654
 655         switch (p->type) {
 656         case V4L2_DV_BT_656_1120:
 657                 pr_cont("type=bt-656/1120, interlaced=%u, "
 658                         "pixelclock=%llu, "
 659                         "width=%u, height=%u, polarities=0x%x, "
 660                         "hfrontporch=%u, hsync=%u, "
 661                         "hbackporch=%u, vfrontporch=%u, "
 662                         "vsync=%u, vbackporch=%u, "
 663                         "il_vfrontporch=%u, il_vsync=%u, "
 664                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 665                                 p->bt.interlaced, p->bt.pixelclock,
 666                                 p->bt.width, p->bt.height,
 667                                 p->bt.polarities, p->bt.hfrontporch,
 668                                 p->bt.hsync, p->bt.hbackporch,
 669                                 p->bt.vfrontporch, p->bt.vsync,
 670                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 671                                 p->bt.il_vsync, p->bt.il_vbackporch,
 672                                 p->bt.standards, p->bt.flags);
 673                 break;
 674         default:
 675                 pr_cont("type=%d\n", p->type);
 676                 break;
 677         }
 678 }
 679
 680 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 681 {
 682         const struct v4l2_enum_dv_timings *p = arg;
 683
 684         pr_cont("index=%u, ", p->index);
 685         v4l_print_dv_timings(&p->timings, write_only);
 686 }
 687
 688 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 689 {
 690         const struct v4l2_dv_timings_cap *p = arg;
 691
 692         switch (p->type) {
 693         case V4L2_DV_BT_656_1120:
 694                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 695                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 696                         p->bt.min_width, p->bt.max_width,
 697                         p->bt.min_height, p->bt.max_height,
 698                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 699                         p->bt.standards, p->bt.capabilities);
 700                 break;
 701         default:
 702                 pr_cont("type=%u\n", p->type);
 703                 break;
 704         }
 705 }
 706
 707 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 708 {
 709         const struct v4l2_frmsizeenum *p = arg;
 710
 711         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 712                         p->index,
 713                         (p->pixel_format & 0xff),
 714                         (p->pixel_format >>  8) & 0xff,
 715                         (p->pixel_format >> 16) & 0xff,
 716                         (p->pixel_format >> 24) & 0xff,
 717                         p->type);
 718         switch (p->type) {
 719         case V4L2_FRMSIZE_TYPE_DISCRETE:
 720                 pr_cont(", wxh=%ux%u\n",
 721                         p->discrete.width, p->discrete.height);
 722                 break;
 723         case V4L2_FRMSIZE_TYPE_STEPWISE:
 724                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 725                                 p->stepwise.min_width,  p->stepwise.min_height,
 726                                 p->stepwise.step_width, p->stepwise.step_height,
 727                                 p->stepwise.max_width,  p->stepwise.max_height);
 728                 break;
 729         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 730                 /* fall through */
 731         default:
 732                 pr_cont("\n");
 733                 break;
 734         }
 735 }
 736
 737 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 738 {
 739         const struct v4l2_frmivalenum *p = arg;
 740
 741         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 742                         p->index,
 743                         (p->pixel_format & 0xff),
 744                         (p->pixel_format >>  8) & 0xff,
 745                         (p->pixel_format >> 16) & 0xff,
 746                         (p->pixel_format >> 24) & 0xff,
 747                         p->width, p->height, p->type);
 748         switch (p->type) {
 749         case V4L2_FRMIVAL_TYPE_DISCRETE:
 750                 pr_cont(", fps=%d/%d\n",
 751                                 p->discrete.numerator,
 752                                 p->discrete.denominator);
 753                 break;
 754         case V4L2_FRMIVAL_TYPE_STEPWISE:
 755                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 756                                 p->stepwise.min.numerator,
 757                                 p->stepwise.min.denominator,
 758                                 p->stepwise.max.numerator,
 759                                 p->stepwise.max.denominator,
 760                                 p->stepwise.step.numerator,
 761                                 p->stepwise.step.denominator);
 762                 break;
 763         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 764                 /* fall through */
 765         default:
 766                 pr_cont("\n");
 767                 break;
 768         }
 769 }
 770
 771 static void v4l_print_event(const void *arg, bool write_only)
 772 {
 773         const struct v4l2_event *p = arg;
 774         const struct v4l2_event_ctrl *c;
 775
 776         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 777                 "timestamp=%lu.%9.9lu\n",
 778                         p->type, p->pending, p->sequence, p->id,
 779                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 780         switch (p->type) {
 781         case V4L2_EVENT_VSYNC:
 782                 printk(KERN_DEBUG "field=%s\n",
 783                         prt_names(p->u.vsync.field, v4l2_field_names));
 784                 break;
 785         case V4L2_EVENT_CTRL:
 786                 c = &p->u.ctrl;
 787                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 788                         c->changes, c->type);
 789                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 790                         pr_cont("value64=%lld, ", c->value64);
 791                 else
 792                         pr_cont("value=%d, ", c->value);
 793                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 794                         "default_value=%d\n",
 795                         c->flags, c->minimum, c->maximum,
 796                         c->step, c->default_value);
 797                 break;
 798         case V4L2_EVENT_FRAME_SYNC:
 799                 pr_cont("frame_sequence=%u\n",
 800                         p->u.frame_sync.frame_sequence);
 801                 break;
 802         }
 803 }
 804
 805 static void v4l_print_event_subscription(const void *arg, bool write_only)
 806 {
 807         const struct v4l2_event_subscription *p = arg;
 808
 809         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 810                         p->type, p->id, p->flags);
 811 }
 812
 813 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 814 {
 815         const struct v4l2_sliced_vbi_cap *p = arg;
 816         int i;
 817
 818         pr_cont("type=%s, service_set=0x%08x\n",
 819                         prt_names(p->type, v4l2_type_names), p->service_set);
 820         for (i = 0; i < 24; i++)
 821                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 822                                 p->service_lines[0][i],
 823                                 p->service_lines[1][i]);
 824 }
 825
 826 static void v4l_print_freq_band(const void *arg, bool write_only)
 827 {
 828         const struct v4l2_frequency_band *p = arg;
 829
 830         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 831                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 832                         p->tuner, p->type, p->index,
 833                         p->capability, p->rangelow,
 834                         p->rangehigh, p->modulation);
 835 }
 836
 837 static void v4l_print_u32(const void *arg, bool write_only)
 838 {
 839         pr_cont("value=%u\n", *(const u32 *)arg);
 840 }
 841
 842 static void v4l_print_newline(const void *arg, bool write_only)
 843 {
 844         pr_cont("\n");
 845 }
 846
 847 static void v4l_print_default(const void *arg, bool write_only)
 848 {
 849         pr_cont("driver-specific ioctl\n");
 850 }
 851
 852 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 853 {
 854         __u32 i;
 855
 856         /* zero the reserved fields */
 857         c->reserved[0] = c->reserved[1] = 0;
 858         for (i = 0; i < c->count; i++)
 859                 c->controls[i].reserved2[0] = 0;
 860
 861         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 862            when using extended controls.
 863            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 864            is it allowed for backwards compatibility.
 865          */
 866         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 867                 return 0;
 868         /* Check that all controls are from the same control class. */
 869         for (i = 0; i < c->count; i++) {
 870                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 871                         c->error_idx = i;
 872                         return 0;
 873                 }
 874         }
 875         return 1;
 876 }
 877
 878 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 879 {
 880         struct video_device *vfd = video_devdata(file);
 881         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 882         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 883         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 884         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 885         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 886
 887         if (ops == NULL)
 888                 return -EINVAL;
 889
 890         switch (type) {
 891         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 892                 if (is_vid && is_rx &&
 893                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 894                         return 0;
 895                 break;
 896         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 897                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 898                         return 0;
 899                 break;
 900         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 901                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 902                         return 0;
 903                 break;
 904         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 905                 if (is_vid && is_tx &&
 906                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 907                         return 0;
 908                 break;
 909         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 910                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 911                         return 0;
 912                 break;
 913         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 914                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 915                         return 0;
 916                 break;
 917         case V4L2_BUF_TYPE_VBI_CAPTURE:
 918                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 919                         return 0;
 920                 break;
 921         case V4L2_BUF_TYPE_VBI_OUTPUT:
 922                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 923                         return 0;
 924                 break;
 925         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 926                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 930                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 931                         return 0;
 932                 break;
 933         default:
 934                 break;
 935         }
 936         return -EINVAL;
 937 }
 938
 939 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 940                                 struct file *file, void *fh, void *arg)
 941 {
 942         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 943
 944         cap->version = LINUX_VERSION_CODE;
 945         return ops->vidioc_querycap(file, fh, cap);
 946 }
 947
 948 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 949                                 struct file *file, void *fh, void *arg)
 950 {
 951         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 952 }
 953
 954 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 955                                 struct file *file, void *fh, void *arg)
 956 {
 957         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 958 }
 959
 960 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 961                                 struct file *file, void *fh, void *arg)
 962 {
 963         struct video_device *vfd;
 964         u32 *p = arg;
 965
 966         if (ops->vidioc_g_priority)
 967                 return ops->vidioc_g_priority(file, fh, arg);
 968         vfd = video_devdata(file);
 969         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 970         return 0;
 971 }
 972
 973 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 974                                 struct file *file, void *fh, void *arg)
 975 {
 976         struct video_device *vfd;
 977         struct v4l2_fh *vfh;
 978         u32 *p = arg;
 979
 980         if (ops->vidioc_s_priority)
 981                 return ops->vidioc_s_priority(file, fh, *p);
 982         vfd = video_devdata(file);
 983         vfh = file->private_data;
 984         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
 985 }
 986
 987 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
 988                                 struct file *file, void *fh, void *arg)
 989 {
 990         struct video_device *vfd = video_devdata(file);
 991         struct v4l2_input *p = arg;
 992
 993         /*
 994          * We set the flags for CAP_DV_TIMINGS &
 995          * CAP_STD here based on ioctl handler provided by the
 996          * driver. If the driver doesn't support these
 997          * for a specific input, it must override these flags.
 998          */
 999         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1000                 p->capabilities |= V4L2_IN_CAP_STD;
1001
1002         return ops->vidioc_enum_input(file, fh, p);
1003 }
1004
1005 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1006                                 struct file *file, void *fh, void *arg)
1007 {
1008         struct video_device *vfd = video_devdata(file);
1009         struct v4l2_output *p = arg;
1010
1011         /*
1012          * We set the flags for CAP_DV_TIMINGS &
1013          * CAP_STD here based on ioctl handler provided by the
1014          * driver. If the driver doesn't support these
1015          * for a specific output, it must override these flags.
1016          */
1017         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1018                 p->capabilities |= V4L2_OUT_CAP_STD;
1019
1020         return ops->vidioc_enum_output(file, fh, p);
1021 }
1022
1023 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1024                                 struct file *file, void *fh, void *arg)
1025 {
1026         struct v4l2_fmtdesc *p = arg;
1027         struct video_device *vfd = video_devdata(file);
1028         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1029         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1030
1031         switch (p->type) {
1032         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1033                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1034                         break;
1035                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1036         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1037                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1038                         break;
1039                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1040         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1041                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1042                         break;
1043                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1044         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1045                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1046                         break;
1047                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1048         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1049                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1050                         break;
1051                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1052         }
1053         return -EINVAL;
1054 }
1055
1056 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1057                                 struct file *file, void *fh, void *arg)
1058 {
1059         struct v4l2_format *p = arg;
1060         struct video_device *vfd = video_devdata(file);
1061         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1062         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1063         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1064
1065         switch (p->type) {
1066         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1067                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1068                         break;
1069                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1070         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1071                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1072                         break;
1073                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1074         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1075                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1076                         break;
1077                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1078         case V4L2_BUF_TYPE_VBI_CAPTURE:
1079                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1080                         break;
1081                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1082         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1083                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1084                         break;
1085                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1086         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1087                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1088                         break;
1089                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1090         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1091                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1092                         break;
1093                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1094         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1095                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1096                         break;
1097                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1098         case V4L2_BUF_TYPE_VBI_OUTPUT:
1099                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1100                         break;
1101                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1102         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1103                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1104                         break;
1105                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1106         }
1107         return -EINVAL;
1108 }
1109
1110 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1111                                 struct file *file, void *fh, void *arg)
1112 {
1113         struct v4l2_format *p = arg;
1114         struct video_device *vfd = video_devdata(file);
1115         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1116         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1117         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1118
1119         switch (p->type) {
1120         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1121                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1122                         break;
1123                 CLEAR_AFTER_FIELD(p, fmt.pix);
1124                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1125         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1126                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1127                         break;
1128                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1129                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1130         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1131                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1132                         break;
1133                 CLEAR_AFTER_FIELD(p, fmt.win);
1134                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1135         case V4L2_BUF_TYPE_VBI_CAPTURE:
1136                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1137                         break;
1138                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1139                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1140         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1141                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1142                         break;
1143                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1144                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1145         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1146                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1147                         break;
1148                 CLEAR_AFTER_FIELD(p, fmt.pix);
1149                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1150         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1151                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1152                         break;
1153                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1154                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1155         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1156                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1157                         break;
1158                 CLEAR_AFTER_FIELD(p, fmt.win);
1159                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1160         case V4L2_BUF_TYPE_VBI_OUTPUT:
1161                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1162                         break;
1163                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1164                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1165         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1166                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1167                         break;
1168                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1169                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1170         }
1171         return -EINVAL;
1172 }
1173
1174 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1175                                 struct file *file, void *fh, void *arg)
1176 {
1177         struct v4l2_format *p = arg;
1178         struct video_device *vfd = video_devdata(file);
1179         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1180         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1181         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1182
1183         switch (p->type) {
1184         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1185                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1186                         break;
1187                 CLEAR_AFTER_FIELD(p, fmt.pix);
1188                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1189         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1190                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1191                         break;
1192                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1193                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1194         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1195                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1196                         break;
1197                 CLEAR_AFTER_FIELD(p, fmt.win);
1198                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1199         case V4L2_BUF_TYPE_VBI_CAPTURE:
1200                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1201                         break;
1202                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1203                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1204         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1205                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1206                         break;
1207                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1208                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1209         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1210                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1211                         break;
1212                 CLEAR_AFTER_FIELD(p, fmt.pix);
1213                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1214         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1215                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1216                         break;
1217                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1218                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1219         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1220                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1221                         break;
1222                 CLEAR_AFTER_FIELD(p, fmt.win);
1223                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1224         case V4L2_BUF_TYPE_VBI_OUTPUT:
1225                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1226                         break;
1227                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1228                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1229         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1230                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1231                         break;
1232                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1233                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1234         }
1235         return -EINVAL;
1236 }
1237
1238 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1239                                 struct file *file, void *fh, void *arg)
1240 {
1241         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1242 }
1243
1244 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1245                                 struct file *file, void *fh, void *arg)
1246 {
1247         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1248 }
1249
1250 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1251                                 struct file *file, void *fh, void *arg)
1252 {
1253         struct video_device *vfd = video_devdata(file);
1254         struct v4l2_tuner *p = arg;
1255         int err;
1256
1257         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1258                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1259         err = ops->vidioc_g_tuner(file, fh, p);
1260         if (!err)
1261                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1262         return err;
1263 }
1264
1265 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1266                                 struct file *file, void *fh, void *arg)
1267 {
1268         struct video_device *vfd = video_devdata(file);
1269         struct v4l2_tuner *p = arg;
1270
1271         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1272                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1273         return ops->vidioc_s_tuner(file, fh, p);
1274 }
1275
1276 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1277                                 struct file *file, void *fh, void *arg)
1278 {
1279         struct v4l2_modulator *p = arg;
1280         int err;
1281
1282         err = ops->vidioc_g_modulator(file, fh, p);
1283         if (!err)
1284                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1285         return err;
1286 }
1287
1288 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1289                                 struct file *file, void *fh, void *arg)
1290 {
1291         struct video_device *vfd = video_devdata(file);
1292         struct v4l2_frequency *p = arg;
1293
1294         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1295                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1296         return ops->vidioc_g_frequency(file, fh, p);
1297 }
1298
1299 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1300                                 struct file *file, void *fh, void *arg)
1301 {
1302         struct video_device *vfd = video_devdata(file);
1303         const struct v4l2_frequency *p = arg;
1304         enum v4l2_tuner_type type;
1305
1306         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1307                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1308         if (p->type != type)
1309                 return -EINVAL;
1310         return ops->vidioc_s_frequency(file, fh, p);
1311 }
1312
1313 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1314                                 struct file *file, void *fh, void *arg)
1315 {
1316         struct video_device *vfd = video_devdata(file);
1317         struct v4l2_standard *p = arg;
1318         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1319         unsigned int index = p->index, i, j = 0;
1320         const char *descr = "";
1321
1322         /* Return -ENODATA if the tvnorms for the current input
1323            or output is 0, meaning that it doesn't support this API. */
1324         if (id == 0)
1325                 return -ENODATA;
1326
1327         /* Return norm array in a canonical way */
1328         for (i = 0; i <= index && id; i++) {
1329                 /* last std value in the standards array is 0, so this
1330                    while always ends there since (id & 0) == 0. */
1331                 while ((id & standards[j].std) != standards[j].std)
1332                         j++;
1333                 curr_id = standards[j].std;
1334                 descr = standards[j].descr;
1335                 j++;
1336                 if (curr_id == 0)
1337                         break;
1338                 if (curr_id != V4L2_STD_PAL &&
1339                                 curr_id != V4L2_STD_SECAM &&
1340                                 curr_id != V4L2_STD_NTSC)
1341                         id &= ~curr_id;
1342         }
1343         if (i <= index)
1344                 return -EINVAL;
1345
1346         v4l2_video_std_construct(p, curr_id, descr);
1347         return 0;
1348 }
1349
1350 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1351                                 struct file *file, void *fh, void *arg)
1352 {
1353         struct video_device *vfd = video_devdata(file);
1354         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1355
1356         norm = id & vfd->tvnorms;
1357         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1358                 return -EINVAL;
1359
1360         /* Calls the specific handler */
1361         return ops->vidioc_s_std(file, fh, norm);
1362 }
1363
1364 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1365                                 struct file *file, void *fh, void *arg)
1366 {
1367         struct video_device *vfd = video_devdata(file);
1368         v4l2_std_id *p = arg;
1369
1370         /*
1371          * If no signal is detected, then the driver should return
1372          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1373          * any standards that do not apply removed.
1374          *
1375          * This means that tuners, audio and video decoders can join
1376          * their efforts to improve the standards detection.
1377          */
1378         *p = vfd->tvnorms;
1379         return ops->vidioc_querystd(file, fh, arg);
1380 }
1381
1382 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1383                                 struct file *file, void *fh, void *arg)
1384 {
1385         struct video_device *vfd = video_devdata(file);
1386         struct v4l2_hw_freq_seek *p = arg;
1387         enum v4l2_tuner_type type;
1388
1389         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1390                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1391         if (p->type != type)
1392                 return -EINVAL;
1393         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1394 }
1395
1396 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1397                                 struct file *file, void *fh, void *arg)
1398 {
1399         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1400 }
1401
1402 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1403                                 struct file *file, void *fh, void *arg)
1404 {
1405         struct v4l2_requestbuffers *p = arg;
1406         int ret = check_fmt(file, p->type);
1407
1408         if (ret)
1409                 return ret;
1410
1411         CLEAR_AFTER_FIELD(p, memory);
1412
1413         return ops->vidioc_reqbufs(file, fh, p);
1414 }
1415
1416 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1417                                 struct file *file, void *fh, void *arg)
1418 {
1419         struct v4l2_buffer *p = arg;
1420         int ret = check_fmt(file, p->type);
1421
1422         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1423 }
1424
1425 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1426                                 struct file *file, void *fh, void *arg)
1427 {
1428         struct v4l2_buffer *p = arg;
1429         int ret = check_fmt(file, p->type);
1430
1431         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1432 }
1433
1434 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1435                                 struct file *file, void *fh, void *arg)
1436 {
1437         struct v4l2_buffer *p = arg;
1438         int ret = check_fmt(file, p->type);
1439
1440         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1441 }
1442
1443 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1444                                 struct file *file, void *fh, void *arg)
1445 {
1446         struct v4l2_create_buffers *create = arg;
1447         int ret = check_fmt(file, create->format.type);
1448
1449         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1450 }
1451
1452 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1453                                 struct file *file, void *fh, void *arg)
1454 {
1455         struct v4l2_buffer *b = arg;
1456         int ret = check_fmt(file, b->type);
1457
1458         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1459 }
1460
1461 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1462                                 struct file *file, void *fh, void *arg)
1463 {
1464         struct v4l2_streamparm *p = arg;
1465         v4l2_std_id std;
1466         int ret = check_fmt(file, p->type);
1467
1468         if (ret)
1469                 return ret;
1470         if (ops->vidioc_g_parm)
1471                 return ops->vidioc_g_parm(file, fh, p);
1472         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1473             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1474                 return -EINVAL;
1475         p->parm.capture.readbuffers = 2;
1476         ret = ops->vidioc_g_std(file, fh, &std);
1477         if (ret == 0)
1478                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1479         return ret;
1480 }
1481
1482 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1483                                 struct file *file, void *fh, void *arg)
1484 {
1485         struct v4l2_streamparm *p = arg;
1486         int ret = check_fmt(file, p->type);
1487
1488         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1489 }
1490
1491 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1492                                 struct file *file, void *fh, void *arg)
1493 {
1494         struct video_device *vfd = video_devdata(file);
1495         struct v4l2_queryctrl *p = arg;
1496         struct v4l2_fh *vfh =
1497                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1498
1499         if (vfh && vfh->ctrl_handler)
1500                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1501         if (vfd->ctrl_handler)
1502                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1503         if (ops->vidioc_queryctrl)
1504                 return ops->vidioc_queryctrl(file, fh, p);
1505         return -ENOTTY;
1506 }
1507
1508 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1509                                 struct file *file, void *fh, void *arg)
1510 {
1511         struct video_device *vfd = video_devdata(file);
1512         struct v4l2_querymenu *p = arg;
1513         struct v4l2_fh *vfh =
1514                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1515
1516         if (vfh && vfh->ctrl_handler)
1517                 return v4l2_querymenu(vfh->ctrl_handler, p);
1518         if (vfd->ctrl_handler)
1519                 return v4l2_querymenu(vfd->ctrl_handler, p);
1520         if (ops->vidioc_querymenu)
1521                 return ops->vidioc_querymenu(file, fh, p);
1522         return -ENOTTY;
1523 }
1524
1525 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1526                                 struct file *file, void *fh, void *arg)
1527 {
1528         struct video_device *vfd = video_devdata(file);
1529         struct v4l2_control *p = arg;
1530         struct v4l2_fh *vfh =
1531                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1532         struct v4l2_ext_controls ctrls;
1533         struct v4l2_ext_control ctrl;
1534
1535         if (vfh && vfh->ctrl_handler)
1536                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1537         if (vfd->ctrl_handler)
1538                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1539         if (ops->vidioc_g_ctrl)
1540                 return ops->vidioc_g_ctrl(file, fh, p);
1541         if (ops->vidioc_g_ext_ctrls == NULL)
1542                 return -ENOTTY;
1543
1544         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1545         ctrls.count = 1;
1546         ctrls.controls = &ctrl;
1547         ctrl.id = p->id;
1548         ctrl.value = p->value;
1549         if (check_ext_ctrls(&ctrls, 1)) {
1550                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1551
1552                 if (ret == 0)
1553                         p->value = ctrl.value;
1554                 return ret;
1555         }
1556         return -EINVAL;
1557 }
1558
1559 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1560                                 struct file *file, void *fh, void *arg)
1561 {
1562         struct video_device *vfd = video_devdata(file);
1563         struct v4l2_control *p = arg;
1564         struct v4l2_fh *vfh =
1565                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1566         struct v4l2_ext_controls ctrls;
1567         struct v4l2_ext_control ctrl;
1568
1569         if (vfh && vfh->ctrl_handler)
1570                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1571         if (vfd->ctrl_handler)
1572                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1573         if (ops->vidioc_s_ctrl)
1574                 return ops->vidioc_s_ctrl(file, fh, p);
1575         if (ops->vidioc_s_ext_ctrls == NULL)
1576                 return -ENOTTY;
1577
1578         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1579         ctrls.count = 1;
1580         ctrls.controls = &ctrl;
1581         ctrl.id = p->id;
1582         ctrl.value = p->value;
1583         if (check_ext_ctrls(&ctrls, 1))
1584                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1585         return -EINVAL;
1586 }
1587
1588 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1589                                 struct file *file, void *fh, void *arg)
1590 {
1591         struct video_device *vfd = video_devdata(file);
1592         struct v4l2_ext_controls *p = arg;
1593         struct v4l2_fh *vfh =
1594                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1595
1596         p->error_idx = p->count;
1597         if (vfh && vfh->ctrl_handler)
1598                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1599         if (vfd->ctrl_handler)
1600                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1601         if (ops->vidioc_g_ext_ctrls == NULL)
1602                 return -ENOTTY;
1603         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1604                                         -EINVAL;
1605 }
1606
1607 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1608                                 struct file *file, void *fh, void *arg)
1609 {
1610         struct video_device *vfd = video_devdata(file);
1611         struct v4l2_ext_controls *p = arg;
1612         struct v4l2_fh *vfh =
1613                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1614
1615         p->error_idx = p->count;
1616         if (vfh && vfh->ctrl_handler)
1617                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1618         if (vfd->ctrl_handler)
1619                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1620         if (ops->vidioc_s_ext_ctrls == NULL)
1621                 return -ENOTTY;
1622         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1623                                         -EINVAL;
1624 }
1625
1626 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1627                                 struct file *file, void *fh, void *arg)
1628 {
1629         struct video_device *vfd = video_devdata(file);
1630         struct v4l2_ext_controls *p = arg;
1631         struct v4l2_fh *vfh =
1632                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1633
1634         p->error_idx = p->count;
1635         if (vfh && vfh->ctrl_handler)
1636                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1637         if (vfd->ctrl_handler)
1638                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1639         if (ops->vidioc_try_ext_ctrls == NULL)
1640                 return -ENOTTY;
1641         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1642                                         -EINVAL;
1643 }
1644
1645 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1646                                 struct file *file, void *fh, void *arg)
1647 {
1648         struct v4l2_crop *p = arg;
1649         struct v4l2_selection s = {
1650                 .type = p->type,
1651         };
1652         int ret;
1653
1654         if (ops->vidioc_g_crop)
1655                 return ops->vidioc_g_crop(file, fh, p);
1656         /* simulate capture crop using selection api */
1657
1658         /* crop means compose for output devices */
1659         if (V4L2_TYPE_IS_OUTPUT(p->type))
1660                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1661         else
1662                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1663
1664         ret = ops->vidioc_g_selection(file, fh, &s);
1665
1666         /* copying results to old structure on success */
1667         if (!ret)
1668                 p->c = s.r;
1669         return ret;
1670 }
1671
1672 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1673                                 struct file *file, void *fh, void *arg)
1674 {
1675         struct v4l2_crop *p = arg;
1676         struct v4l2_selection s = {
1677                 .type = p->type,
1678                 .r = p->c,
1679         };
1680
1681         if (ops->vidioc_s_crop)
1682                 return ops->vidioc_s_crop(file, fh, p);
1683         /* simulate capture crop using selection api */
1684
1685         /* crop means compose for output devices */
1686         if (V4L2_TYPE_IS_OUTPUT(p->type))
1687                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1688         else
1689                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1690
1691         return ops->vidioc_s_selection(file, fh, &s);
1692 }
1693
1694 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1695                                 struct file *file, void *fh, void *arg)
1696 {
1697         struct v4l2_cropcap *p = arg;
1698         struct v4l2_selection s = { .type = p->type };
1699         int ret;
1700
1701         if (ops->vidioc_cropcap)
1702                 return ops->vidioc_cropcap(file, fh, p);
1703
1704         /* obtaining bounds */
1705         if (V4L2_TYPE_IS_OUTPUT(p->type))
1706                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1707         else
1708                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1709
1710         ret = ops->vidioc_g_selection(file, fh, &s);
1711         if (ret)
1712                 return ret;
1713         p->bounds = s.r;
1714
1715         /* obtaining defrect */
1716         if (V4L2_TYPE_IS_OUTPUT(p->type))
1717                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1718         else
1719                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1720
1721         ret = ops->vidioc_g_selection(file, fh, &s);
1722         if (ret)
1723                 return ret;
1724         p->defrect = s.r;
1725
1726         /* setting trivial pixelaspect */
1727         p->pixelaspect.numerator = 1;
1728         p->pixelaspect.denominator = 1;
1729         return 0;
1730 }
1731
1732 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1733                                 struct file *file, void *fh, void *arg)
1734 {
1735         struct video_device *vfd = video_devdata(file);
1736         int ret;
1737
1738         if (vfd->v4l2_dev)
1739                 pr_info("%s: =================  START STATUS  =================\n",
1740                         vfd->v4l2_dev->name);
1741         ret = ops->vidioc_log_status(file, fh);
1742         if (vfd->v4l2_dev)
1743                 pr_info("%s: ==================  END STATUS  ==================\n",
1744                         vfd->v4l2_dev->name);
1745         return ret;
1746 }
1747
1748 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1749                                 struct file *file, void *fh, void *arg)
1750 {
1751 #ifdef CONFIG_VIDEO_ADV_DEBUG
1752         struct v4l2_dbg_register *p = arg;
1753         struct video_device *vfd = video_devdata(file);
1754         struct v4l2_subdev *sd;
1755         int idx = 0;
1756
1757         if (!capable(CAP_SYS_ADMIN))
1758                 return -EPERM;
1759         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1760                 if (vfd->v4l2_dev == NULL)
1761                         return -EINVAL;
1762                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1763                         if (p->match.addr == idx++)
1764                                 return v4l2_subdev_call(sd, core, g_register, p);
1765                 return -EINVAL;
1766         }
1767         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1768             (ops->vidioc_g_chip_info || p->match.addr == 0))
1769                 return ops->vidioc_g_register(file, fh, p);
1770         return -EINVAL;
1771 #else
1772         return -ENOTTY;
1773 #endif
1774 }
1775
1776 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1777                                 struct file *file, void *fh, void *arg)
1778 {
1779 #ifdef CONFIG_VIDEO_ADV_DEBUG
1780         const struct v4l2_dbg_register *p = arg;
1781         struct video_device *vfd = video_devdata(file);
1782         struct v4l2_subdev *sd;
1783         int idx = 0;
1784
1785         if (!capable(CAP_SYS_ADMIN))
1786                 return -EPERM;
1787         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1788                 if (vfd->v4l2_dev == NULL)
1789                         return -EINVAL;
1790                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1791                         if (p->match.addr == idx++)
1792                                 return v4l2_subdev_call(sd, core, s_register, p);
1793                 return -EINVAL;
1794         }
1795         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1796             (ops->vidioc_g_chip_info || p->match.addr == 0))
1797                 return ops->vidioc_s_register(file, fh, p);
1798         return -EINVAL;
1799 #else
1800         return -ENOTTY;
1801 #endif
1802 }
1803
1804 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1805                                 struct file *file, void *fh, void *arg)
1806 {
1807 #ifdef CONFIG_VIDEO_ADV_DEBUG
1808         struct video_device *vfd = video_devdata(file);
1809         struct v4l2_dbg_chip_info *p = arg;
1810         struct v4l2_subdev *sd;
1811         int idx = 0;
1812
1813         switch (p->match.type) {
1814         case V4L2_CHIP_MATCH_BRIDGE:
1815                 if (ops->vidioc_s_register)
1816                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1817                 if (ops->vidioc_g_register)
1818                         p->flags |= V4L2_CHIP_FL_READABLE;
1819                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1820                 if (ops->vidioc_g_chip_info)
1821                         return ops->vidioc_g_chip_info(file, fh, arg);
1822                 if (p->match.addr)
1823                         return -EINVAL;
1824                 return 0;
1825
1826         case V4L2_CHIP_MATCH_SUBDEV:
1827                 if (vfd->v4l2_dev == NULL)
1828                         break;
1829                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1830                         if (p->match.addr != idx++)
1831                                 continue;
1832                         if (sd->ops->core && sd->ops->core->s_register)
1833                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
1834                         if (sd->ops->core && sd->ops->core->g_register)
1835                                 p->flags |= V4L2_CHIP_FL_READABLE;
1836                         strlcpy(p->name, sd->name, sizeof(p->name));
1837                         return 0;
1838                 }
1839                 break;
1840         }
1841         return -EINVAL;
1842 #else
1843         return -ENOTTY;
1844 #endif
1845 }
1846
1847 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1848                                 struct file *file, void *fh, void *arg)
1849 {
1850         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1851 }
1852
1853 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1854                                 struct file *file, void *fh, void *arg)
1855 {
1856         return ops->vidioc_subscribe_event(fh, arg);
1857 }
1858
1859 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1860                                 struct file *file, void *fh, void *arg)
1861 {
1862         return ops->vidioc_unsubscribe_event(fh, arg);
1863 }
1864
1865 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1866                                 struct file *file, void *fh, void *arg)
1867 {
1868         struct v4l2_sliced_vbi_cap *p = arg;
1869         int ret = check_fmt(file, p->type);
1870
1871         if (ret)
1872                 return ret;
1873
1874         /* Clear up to type, everything after type is zeroed already */
1875         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1876
1877         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1878 }
1879
1880 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1881                                 struct file *file, void *fh, void *arg)
1882 {
1883         struct video_device *vfd = video_devdata(file);
1884         struct v4l2_frequency_band *p = arg;
1885         enum v4l2_tuner_type type;
1886         int err;
1887
1888         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1889                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1890
1891         if (type != p->type)
1892                 return -EINVAL;
1893         if (ops->vidioc_enum_freq_bands)
1894                 return ops->vidioc_enum_freq_bands(file, fh, p);
1895         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1896                 struct v4l2_tuner t = {
1897                         .index = p->tuner,
1898                         .type = type,
1899                 };
1900
1901                 if (p->index)
1902                         return -EINVAL;
1903                 err = ops->vidioc_g_tuner(file, fh, &t);
1904                 if (err)
1905                         return err;
1906                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1907                 p->rangelow = t.rangelow;
1908                 p->rangehigh = t.rangehigh;
1909                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1910                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1911                 return 0;
1912         }
1913         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1914                 struct v4l2_modulator m = {
1915                         .index = p->tuner,
1916                 };
1917
1918                 if (type != V4L2_TUNER_RADIO)
1919                         return -EINVAL;
1920                 if (p->index)
1921                         return -EINVAL;
1922                 err = ops->vidioc_g_modulator(file, fh, &m);
1923                 if (err)
1924                         return err;
1925                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1926                 p->rangelow = m.rangelow;
1927                 p->rangehigh = m.rangehigh;
1928                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1929                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1930                 return 0;
1931         }
1932         return -ENOTTY;
1933 }
1934
1935 struct v4l2_ioctl_info {
1936         unsigned int ioctl;
1937         u32 flags;
1938         const char * const name;
1939         union {
1940                 u32 offset;
1941                 int (*func)(const struct v4l2_ioctl_ops *ops,
1942                                 struct file *file, void *fh, void *p);
1943         } u;
1944         void (*debug)(const void *arg, bool write_only);
1945 };
1946
1947 /* This control needs a priority check */
1948 #define INFO_FL_PRIO    (1 << 0)
1949 /* This control can be valid if the filehandle passes a control handler. */
1950 #define INFO_FL_CTRL    (1 << 1)
1951 /* This is a standard ioctl, no need for special code */
1952 #define INFO_FL_STD     (1 << 2)
1953 /* This is ioctl has its own function */
1954 #define INFO_FL_FUNC    (1 << 3)
1955 /* Queuing ioctl */
1956 #define INFO_FL_QUEUE   (1 << 4)
1957 /* Zero struct from after the field to the end */
1958 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1959         ((offsetof(struct v4l2_struct, field) +                 \
1960           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1961 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1962
1963 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1964         [_IOC_NR(_ioctl)] = {                                           \
1965                 .ioctl = _ioctl,                                        \
1966                 .flags = _flags | INFO_FL_STD,                          \
1967                 .name = #_ioctl,                                        \
1968                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
1969                 .debug = _debug,                                        \
1970         }
1971
1972 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1973         [_IOC_NR(_ioctl)] = {                                           \
1974                 .ioctl = _ioctl,                                        \
1975                 .flags = _flags | INFO_FL_FUNC,                         \
1976                 .name = #_ioctl,                                        \
1977                 .u.func = _func,                                        \
1978                 .debug = _debug,                                        \
1979         }
1980
1981 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1982         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1983         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1984         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1985         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1986         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1987         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1988         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1989         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1990         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
1991         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1992         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
1993         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1994         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1995         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1996         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1997         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1998         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
1999         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2000         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2001         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2002         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2003         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2004         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2005         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2006         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2007         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2008         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2009         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2010         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2011         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2012         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2013         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2014         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2015         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2016         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2017         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2018         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2019         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2020         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2021         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2022         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2023         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2024         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2025         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2026         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2027         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2028         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2029         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2030         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2031         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2032         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2033         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2034         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)),
2035         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2036         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2037         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2038         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2039         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2040         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2041         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2042         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2043         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2044         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2045         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2046         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2047         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2048         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2049         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2050         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2051         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2052         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2053         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2054         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2055         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2056         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2057         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2058         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2059         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2060         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2061 };
2062 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2063
2064 bool v4l2_is_known_ioctl(unsigned int cmd)
2065 {
2066         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2067                 return false;
2068         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2069 }
2070
2071 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2072 {
2073         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2074                 return vdev->lock;
2075         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2076                 return NULL;
2077         if (vdev->queue && vdev->queue->lock &&
2078                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2079                 return vdev->queue->lock;
2080         return vdev->lock;
2081 }
2082
2083 /* Common ioctl debug function. This function can be used by
2084    external ioctl messages as well as internal V4L ioctl */
2085 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2086 {
2087         const char *dir, *type;
2088
2089         if (prefix)
2090                 printk(KERN_DEBUG "%s: ", prefix);
2091
2092         switch (_IOC_TYPE(cmd)) {
2093         case 'd':
2094                 type = "v4l2_int";
2095                 break;
2096         case 'V':
2097                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2098                         type = "v4l2";
2099                         break;
2100                 }
2101                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2102                 return;
2103         default:
2104                 type = "unknown";
2105                 break;
2106         }
2107
2108         switch (_IOC_DIR(cmd)) {
2109         case _IOC_NONE:              dir = "--"; break;
2110         case _IOC_READ:              dir = "r-"; break;
2111         case _IOC_WRITE:             dir = "-w"; break;
2112         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2113         default:                     dir = "*ERR*"; break;
2114         }
2115         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2116                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2117 }
2118 EXPORT_SYMBOL(v4l_printk_ioctl);
2119
2120 static long __video_do_ioctl(struct file *file,
2121                 unsigned int cmd, void *arg)
2122 {
2123         struct video_device *vfd = video_devdata(file);
2124         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2125         bool write_only = false;
2126         struct v4l2_ioctl_info default_info;
2127         const struct v4l2_ioctl_info *info;
2128         void *fh = file->private_data;
2129         struct v4l2_fh *vfh = NULL;
2130         int use_fh_prio = 0;
2131         int debug = vfd->debug;
2132         long ret = -ENOTTY;
2133
2134         if (ops == NULL) {
2135                 pr_warn("%s: has no ioctl_ops.\n",
2136                                 video_device_node_name(vfd));
2137                 return ret;
2138         }
2139
2140         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2141                 vfh = file->private_data;
2142                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2143         }
2144
2145         if (v4l2_is_known_ioctl(cmd)) {
2146                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2147
2148                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2149                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2150                         goto done;
2151
2152                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2153                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2154                         if (ret)
2155                                 goto done;
2156                 }
2157         } else {
2158                 default_info.ioctl = cmd;
2159                 default_info.flags = 0;
2160                 default_info.debug = v4l_print_default;
2161                 info = &default_info;
2162         }
2163
2164         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2165         if (info->flags & INFO_FL_STD) {
2166                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2167                 const void *p = vfd->ioctl_ops;
2168                 const vidioc_op *vidioc = p + info->u.offset;
2169
2170                 ret = (*vidioc)(file, fh, arg);
2171         } else if (info->flags & INFO_FL_FUNC) {
2172                 ret = info->u.func(ops, file, fh, arg);
2173         } else if (!ops->vidioc_default) {
2174                 ret = -ENOTTY;
2175         } else {
2176                 ret = ops->vidioc_default(file, fh,
2177                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2178                         cmd, arg);
2179         }
2180
2181 done:
2182         if (debug) {
2183                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2184                 if (ret < 0)
2185                         pr_cont(": error %ld", ret);
2186                 if (debug == V4L2_DEBUG_IOCTL)
2187                         pr_cont("\n");
2188                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2189                         info->debug(arg, write_only);
2190                 else {
2191                         pr_cont(": ");
2192                         info->debug(arg, write_only);
2193                 }
2194         }
2195
2196         return ret;
2197 }
2198
2199 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2200                             void * __user *user_ptr, void ***kernel_ptr)
2201 {
2202         int ret = 0;
2203
2204         switch (cmd) {
2205         case VIDIOC_PREPARE_BUF:
2206         case VIDIOC_QUERYBUF:
2207         case VIDIOC_QBUF:
2208         case VIDIOC_DQBUF: {
2209                 struct v4l2_buffer *buf = parg;
2210
2211                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2212                         if (buf->length > VIDEO_MAX_PLANES) {
2213                                 ret = -EINVAL;
2214                                 break;
2215                         }
2216                         *user_ptr = (void __user *)buf->m.planes;
2217                         *kernel_ptr = (void *)&buf->m.planes;
2218                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2219                         ret = 1;
2220                 }
2221                 break;
2222         }
2223
2224         case VIDIOC_SUBDEV_G_EDID:
2225         case VIDIOC_SUBDEV_S_EDID: {
2226                 struct v4l2_subdev_edid *edid = parg;
2227
2228                 if (edid->blocks) {
2229                         if (edid->blocks > 256) {
2230                                 ret = -EINVAL;
2231                                 break;
2232                         }
2233                         *user_ptr = (void __user *)edid->edid;
2234                         *kernel_ptr = (void *)&edid->edid;
2235                         *array_size = edid->blocks * 128;
2236                         ret = 1;
2237                 }
2238                 break;
2239         }
2240
2241         case VIDIOC_S_EXT_CTRLS:
2242         case VIDIOC_G_EXT_CTRLS:
2243         case VIDIOC_TRY_EXT_CTRLS: {
2244                 struct v4l2_ext_controls *ctrls = parg;
2245
2246                 if (ctrls->count != 0) {
2247                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2248                                 ret = -EINVAL;
2249                                 break;
2250                         }
2251                         *user_ptr = (void __user *)ctrls->controls;
2252                         *kernel_ptr = (void *)&ctrls->controls;
2253                         *array_size = sizeof(struct v4l2_ext_control)
2254                                     * ctrls->count;
2255                         ret = 1;
2256                 }
2257                 break;
2258         }
2259         }
2260
2261         return ret;
2262 }
2263
2264 long
2265 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2266                v4l2_kioctl func)
2267 {
2268         char    sbuf[128];
2269         void    *mbuf = NULL;
2270         void    *parg = (void *)arg;
2271         long    err  = -EINVAL;
2272         bool    has_array_args;
2273         size_t  array_size = 0;
2274         void __user *user_ptr = NULL;
2275         void    **kernel_ptr = NULL;
2276
2277         /*  Copy arguments into temp kernel buffer  */
2278         if (_IOC_DIR(cmd) != _IOC_NONE) {
2279                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2280                         parg = sbuf;
2281                 } else {
2282                         /* too big to allocate from stack */
2283                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2284                         if (NULL == mbuf)
2285                                 return -ENOMEM;
2286                         parg = mbuf;
2287                 }
2288
2289                 err = -EFAULT;
2290                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2291                         unsigned int n = _IOC_SIZE(cmd);
2292
2293                         /*
2294                          * In some cases, only a few fields are used as input,
2295                          * i.e. when the app sets "index" and then the driver
2296                          * fills in the rest of the structure for the thing
2297                          * with that index.  We only need to copy up the first
2298                          * non-input field.
2299                          */
2300                         if (v4l2_is_known_ioctl(cmd)) {
2301                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2302                                 if (flags & INFO_FL_CLEAR_MASK)
2303                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2304                         }
2305
2306                         if (copy_from_user(parg, (void __user *)arg, n))
2307                                 goto out;
2308
2309                         /* zero out anything we don't copy from userspace */
2310                         if (n < _IOC_SIZE(cmd))
2311                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2312                 } else {
2313                         /* read-only ioctl */
2314                         memset(parg, 0, _IOC_SIZE(cmd));
2315                 }
2316         }
2317
2318         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2319         if (err < 0)
2320                 goto out;
2321         has_array_args = err;
2322
2323         if (has_array_args) {
2324                 /*
2325                  * When adding new types of array args, make sure that the
2326                  * parent argument to ioctl (which contains the pointer to the
2327                  * array) fits into sbuf (so that mbuf will still remain
2328                  * unused up to here).
2329                  */
2330                 mbuf = kmalloc(array_size, GFP_KERNEL);
2331                 err = -ENOMEM;
2332                 if (NULL == mbuf)
2333                         goto out_array_args;
2334                 err = -EFAULT;
2335                 if (copy_from_user(mbuf, user_ptr, array_size))
2336                         goto out_array_args;
2337                 *kernel_ptr = mbuf;
2338         }
2339
2340         /* Handles IOCTL */
2341         err = func(file, cmd, parg);
2342         if (err == -ENOIOCTLCMD)
2343                 err = -ENOTTY;
2344         if (err == 0) {
2345                 if (cmd == VIDIOC_DQBUF)
2346                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2347                 else if (cmd == VIDIOC_QBUF)
2348                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2349         }
2350
2351         if (has_array_args) {
2352                 *kernel_ptr = user_ptr;
2353                 if (copy_to_user(user_ptr, mbuf, array_size))
2354                         err = -EFAULT;
2355                 goto out_array_args;
2356         }
2357         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2358            results that must be returned. */
2359         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2360                 goto out;
2361
2362 out_array_args:
2363         /*  Copy results into user buffer  */
2364         switch (_IOC_DIR(cmd)) {
2365         case _IOC_READ:
2366         case (_IOC_WRITE | _IOC_READ):
2367                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2368                         err = -EFAULT;
2369                 break;
2370         }
2371
2372 out:
2373         kfree(mbuf);
2374         return err;
2375 }
2376 EXPORT_SYMBOL(video_usercopy);
2377
2378 long video_ioctl2(struct file *file,
2379                unsigned int cmd, unsigned long arg)
2380 {
2381         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2382 }
2383 EXPORT_SYMBOL(video_ioctl2);