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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-chip-ident.h>
  30 #include <media/videobuf2-core.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40 struct std_descr {
  41         v4l2_std_id std;
  42         const char *descr;
  43 };
  44
  45 static const struct std_descr standards[] = {
  46         { V4L2_STD_NTSC,        "NTSC"      },
  47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51         { V4L2_STD_PAL,         "PAL"       },
  52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53         { V4L2_STD_PAL_B,       "PAL-B"     },
  54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55         { V4L2_STD_PAL_G,       "PAL-G"     },
  56         { V4L2_STD_PAL_H,       "PAL-H"     },
  57         { V4L2_STD_PAL_I,       "PAL-I"     },
  58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59         { V4L2_STD_PAL_D,       "PAL-D"     },
  60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61         { V4L2_STD_PAL_K,       "PAL-K"     },
  62         { V4L2_STD_PAL_M,       "PAL-M"     },
  63         { V4L2_STD_PAL_N,       "PAL-N"     },
  64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65         { V4L2_STD_PAL_60,      "PAL-60"    },
  66         { V4L2_STD_SECAM,       "SECAM"     },
  67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76         { 0,                    "Unknown"   }
  77 };
  78
  79 /* video4linux standard ID conversion to standard name
  80  */
  81 const char *v4l2_norm_to_name(v4l2_std_id id)
  82 {
  83         u32 myid = id;
  84         int i;
  85
  86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87            64 bit comparations. So, on that architecture, with some gcc
  88            variants, compilation fails. Currently, the max value is 30bit wide.
  89          */
  90         BUG_ON(myid != id);
  91
  92         for (i = 0; standards[i].std; i++)
  93                 if (myid == standards[i].std)
  94                         break;
  95         return standards[i].descr;
  96 }
  97 EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99 /* Returns frame period for the given standard */
 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101 {
 102         if (id & V4L2_STD_525_60) {
 103                 frameperiod->numerator = 1001;
 104                 frameperiod->denominator = 30000;
 105         } else {
 106                 frameperiod->numerator = 1;
 107                 frameperiod->denominator = 25;
 108         }
 109 }
 110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112 /* Fill in the fields of a v4l2_standard structure according to the
 113    'id' and 'transmission' parameters.  Returns negative on error.  */
 114 int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                              int id, const char *name)
 116 {
 117         vs->id = id;
 118         v4l2_video_std_frame_period(id, &vs->frameperiod);
 119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120         strlcpy(vs->name, name, sizeof(vs->name));
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125 /* ----------------------------------------------------------------- */
 126 /* some arrays for pretty-printing debug messages of enum types      */
 127
 128 const char *v4l2_field_names[] = {
 129         [V4L2_FIELD_ANY]        = "any",
 130         [V4L2_FIELD_NONE]       = "none",
 131         [V4L2_FIELD_TOP]        = "top",
 132         [V4L2_FIELD_BOTTOM]     = "bottom",
 133         [V4L2_FIELD_INTERLACED] = "interlaced",
 134         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 135         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 136         [V4L2_FIELD_ALTERNATE]  = "alternate",
 137         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 138         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 139 };
 140 EXPORT_SYMBOL(v4l2_field_names);
 141
 142 const char *v4l2_type_names[] = {
 143         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 144         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 145         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 146         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 147         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 148         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 149         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 151         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 153 };
 154 EXPORT_SYMBOL(v4l2_type_names);
 155
 156 static const char *v4l2_memory_names[] = {
 157         [V4L2_MEMORY_MMAP]    = "mmap",
 158         [V4L2_MEMORY_USERPTR] = "userptr",
 159         [V4L2_MEMORY_OVERLAY] = "overlay",
 160         [V4L2_MEMORY_DMABUF] = "dmabuf",
 161 };
 162
 163 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 164
 165 /* ------------------------------------------------------------------ */
 166 /* debug help functions                                               */
 167
 168 static void v4l_print_querycap(const void *arg, bool write_only)
 169 {
 170         const struct v4l2_capability *p = arg;
 171
 172         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 173                 "capabilities=0x%08x, device_caps=0x%08x\n",
 174                 (int)sizeof(p->driver), p->driver,
 175                 (int)sizeof(p->card), p->card,
 176                 (int)sizeof(p->bus_info), p->bus_info,
 177                 p->version, p->capabilities, p->device_caps);
 178 }
 179
 180 static void v4l_print_enuminput(const void *arg, bool write_only)
 181 {
 182         const struct v4l2_input *p = arg;
 183
 184         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 185                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 186                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 187                 p->tuner, (unsigned long long)p->std, p->status,
 188                 p->capabilities);
 189 }
 190
 191 static void v4l_print_enumoutput(const void *arg, bool write_only)
 192 {
 193         const struct v4l2_output *p = arg;
 194
 195         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 196                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 197                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 198                 p->modulator, (unsigned long long)p->std, p->capabilities);
 199 }
 200
 201 static void v4l_print_audio(const void *arg, bool write_only)
 202 {
 203         const struct v4l2_audio *p = arg;
 204
 205         if (write_only)
 206                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 207         else
 208                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 209                         p->index, (int)sizeof(p->name), p->name,
 210                         p->capability, p->mode);
 211 }
 212
 213 static void v4l_print_audioout(const void *arg, bool write_only)
 214 {
 215         const struct v4l2_audioout *p = arg;
 216
 217         if (write_only)
 218                 pr_cont("index=%u\n", p->index);
 219         else
 220                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 221                         p->index, (int)sizeof(p->name), p->name,
 222                         p->capability, p->mode);
 223 }
 224
 225 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 226 {
 227         const struct v4l2_fmtdesc *p = arg;
 228
 229         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 230                 p->index, prt_names(p->type, v4l2_type_names),
 231                 p->flags, (p->pixelformat & 0xff),
 232                 (p->pixelformat >>  8) & 0xff,
 233                 (p->pixelformat >> 16) & 0xff,
 234                 (p->pixelformat >> 24) & 0xff,
 235                 (int)sizeof(p->description), p->description);
 236 }
 237
 238 static void v4l_print_format(const void *arg, bool write_only)
 239 {
 240         const struct v4l2_format *p = arg;
 241         const struct v4l2_pix_format *pix;
 242         const struct v4l2_pix_format_mplane *mp;
 243         const struct v4l2_vbi_format *vbi;
 244         const struct v4l2_sliced_vbi_format *sliced;
 245         const struct v4l2_window *win;
 246         const struct v4l2_clip *clip;
 247         unsigned i;
 248
 249         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 250         switch (p->type) {
 251         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 252         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 253                 pix = &p->fmt.pix;
 254                 pr_cont(", width=%u, height=%u, "
 255                         "pixelformat=%c%c%c%c, field=%s, "
 256                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 257                         pix->width, pix->height,
 258                         (pix->pixelformat & 0xff),
 259                         (pix->pixelformat >>  8) & 0xff,
 260                         (pix->pixelformat >> 16) & 0xff,
 261                         (pix->pixelformat >> 24) & 0xff,
 262                         prt_names(pix->field, v4l2_field_names),
 263                         pix->bytesperline, pix->sizeimage,
 264                         pix->colorspace);
 265                 break;
 266         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 267         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 268                 mp = &p->fmt.pix_mp;
 269                 pr_cont(", width=%u, height=%u, "
 270                         "format=%c%c%c%c, field=%s, "
 271                         "colorspace=%d, num_planes=%u\n",
 272                         mp->width, mp->height,
 273                         (mp->pixelformat & 0xff),
 274                         (mp->pixelformat >>  8) & 0xff,
 275                         (mp->pixelformat >> 16) & 0xff,
 276                         (mp->pixelformat >> 24) & 0xff,
 277                         prt_names(mp->field, v4l2_field_names),
 278                         mp->colorspace, mp->num_planes);
 279                 for (i = 0; i < mp->num_planes; i++)
 280                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 281                                         mp->plane_fmt[i].bytesperline,
 282                                         mp->plane_fmt[i].sizeimage);
 283                 break;
 284         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 285         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 286                 win = &p->fmt.win;
 287                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 288                         "chromakey=0x%08x, bitmap=%p, "
 289                         "global_alpha=0x%02x\n",
 290                         win->w.width, win->w.height,
 291                         win->w.left, win->w.top,
 292                         prt_names(win->field, v4l2_field_names),
 293                         win->chromakey, win->bitmap, win->global_alpha);
 294                 clip = win->clips;
 295                 for (i = 0; i < win->clipcount; i++) {
 296                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 297                                         i, clip->c.width, clip->c.height,
 298                                         clip->c.left, clip->c.top);
 299                         clip = clip->next;
 300                 }
 301                 break;
 302         case V4L2_BUF_TYPE_VBI_CAPTURE:
 303         case V4L2_BUF_TYPE_VBI_OUTPUT:
 304                 vbi = &p->fmt.vbi;
 305                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 306                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 307                         vbi->sampling_rate, vbi->offset,
 308                         vbi->samples_per_line,
 309                         (vbi->sample_format & 0xff),
 310                         (vbi->sample_format >>  8) & 0xff,
 311                         (vbi->sample_format >> 16) & 0xff,
 312                         (vbi->sample_format >> 24) & 0xff,
 313                         vbi->start[0], vbi->start[1],
 314                         vbi->count[0], vbi->count[1]);
 315                 break;
 316         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 317         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 318                 sliced = &p->fmt.sliced;
 319                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 320                                 sliced->service_set, sliced->io_size);
 321                 for (i = 0; i < 24; i++)
 322                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 323                                 sliced->service_lines[0][i],
 324                                 sliced->service_lines[1][i]);
 325                 break;
 326         }
 327 }
 328
 329 static void v4l_print_framebuffer(const void *arg, bool write_only)
 330 {
 331         const struct v4l2_framebuffer *p = arg;
 332
 333         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 334                 "height=%u, pixelformat=%c%c%c%c, "
 335                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 336                         p->capability, p->flags, p->base,
 337                         p->fmt.width, p->fmt.height,
 338                         (p->fmt.pixelformat & 0xff),
 339                         (p->fmt.pixelformat >>  8) & 0xff,
 340                         (p->fmt.pixelformat >> 16) & 0xff,
 341                         (p->fmt.pixelformat >> 24) & 0xff,
 342                         p->fmt.bytesperline, p->fmt.sizeimage,
 343                         p->fmt.colorspace);
 344 }
 345
 346 static void v4l_print_buftype(const void *arg, bool write_only)
 347 {
 348         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 349 }
 350
 351 static void v4l_print_modulator(const void *arg, bool write_only)
 352 {
 353         const struct v4l2_modulator *p = arg;
 354
 355         if (write_only)
 356                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 357         else
 358                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 359                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 360                         p->index, (int)sizeof(p->name), p->name, p->capability,
 361                         p->rangelow, p->rangehigh, p->txsubchans);
 362 }
 363
 364 static void v4l_print_tuner(const void *arg, bool write_only)
 365 {
 366         const struct v4l2_tuner *p = arg;
 367
 368         if (write_only)
 369                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 370         else
 371                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 372                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 373                         "rxsubchans=0x%x, audmode=%u\n",
 374                         p->index, (int)sizeof(p->name), p->name, p->type,
 375                         p->capability, p->rangelow,
 376                         p->rangehigh, p->signal, p->afc,
 377                         p->rxsubchans, p->audmode);
 378 }
 379
 380 static void v4l_print_frequency(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_frequency *p = arg;
 383
 384         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 385                                 p->tuner, p->type, p->frequency);
 386 }
 387
 388 static void v4l_print_standard(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_standard *p = arg;
 391
 392         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 393                 "framelines=%u\n", p->index,
 394                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 395                 p->frameperiod.numerator,
 396                 p->frameperiod.denominator,
 397                 p->framelines);
 398 }
 399
 400 static void v4l_print_std(const void *arg, bool write_only)
 401 {
 402         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 403 }
 404
 405 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 406 {
 407         const struct v4l2_hw_freq_seek *p = arg;
 408
 409         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 410                 "rangelow=%u, rangehigh=%u\n",
 411                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 412                 p->rangelow, p->rangehigh);
 413 }
 414
 415 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 416 {
 417         const struct v4l2_requestbuffers *p = arg;
 418
 419         pr_cont("count=%d, type=%s, memory=%s\n",
 420                 p->count,
 421                 prt_names(p->type, v4l2_type_names),
 422                 prt_names(p->memory, v4l2_memory_names));
 423 }
 424
 425 static void v4l_print_buffer(const void *arg, bool write_only)
 426 {
 427         const struct v4l2_buffer *p = arg;
 428         const struct v4l2_timecode *tc = &p->timecode;
 429         const struct v4l2_plane *plane;
 430         int i;
 431
 432         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 433                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 434                         p->timestamp.tv_sec / 3600,
 435                         (int)(p->timestamp.tv_sec / 60) % 60,
 436                         (int)(p->timestamp.tv_sec % 60),
 437                         (long)p->timestamp.tv_usec,
 438                         p->index,
 439                         prt_names(p->type, v4l2_type_names),
 440                         p->flags, prt_names(p->field, v4l2_field_names),
 441                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 442
 443         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 444                 pr_cont("\n");
 445                 for (i = 0; i < p->length; ++i) {
 446                         plane = &p->m.planes[i];
 447                         printk(KERN_DEBUG
 448                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 449                                 "offset/userptr=0x%lx, length=%d\n",
 450                                 i, plane->bytesused, plane->data_offset,
 451                                 plane->m.userptr, plane->length);
 452                 }
 453         } else {
 454                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 455                         p->bytesused, p->m.userptr, p->length);
 456         }
 457
 458         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 459                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 460                         tc->hours, tc->minutes, tc->seconds,
 461                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 462 }
 463
 464 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 465 {
 466         const struct v4l2_exportbuffer *p = arg;
 467
 468         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 469                 p->fd, prt_names(p->type, v4l2_type_names),
 470                 p->index, p->plane, p->flags);
 471 }
 472
 473 static void v4l_print_create_buffers(const void *arg, bool write_only)
 474 {
 475         const struct v4l2_create_buffers *p = arg;
 476
 477         pr_cont("index=%d, count=%d, memory=%s, ",
 478                         p->index, p->count,
 479                         prt_names(p->memory, v4l2_memory_names));
 480         v4l_print_format(&p->format, write_only);
 481 }
 482
 483 static void v4l_print_streamparm(const void *arg, bool write_only)
 484 {
 485         const struct v4l2_streamparm *p = arg;
 486
 487         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 488
 489         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 490             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 491                 const struct v4l2_captureparm *c = &p->parm.capture;
 492
 493                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 494                         "extendedmode=%d, readbuffers=%d\n",
 495                         c->capability, c->capturemode,
 496                         c->timeperframe.numerator, c->timeperframe.denominator,
 497                         c->extendedmode, c->readbuffers);
 498         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 499                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 500                 const struct v4l2_outputparm *c = &p->parm.output;
 501
 502                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 503                         "extendedmode=%d, writebuffers=%d\n",
 504                         c->capability, c->outputmode,
 505                         c->timeperframe.numerator, c->timeperframe.denominator,
 506                         c->extendedmode, c->writebuffers);
 507         }
 508 }
 509
 510 static void v4l_print_queryctrl(const void *arg, bool write_only)
 511 {
 512         const struct v4l2_queryctrl *p = arg;
 513
 514         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 515                 "step=%d, default=%d, flags=0x%08x\n",
 516                         p->id, p->type, (int)sizeof(p->name), p->name,
 517                         p->minimum, p->maximum,
 518                         p->step, p->default_value, p->flags);
 519 }
 520
 521 static void v4l_print_querymenu(const void *arg, bool write_only)
 522 {
 523         const struct v4l2_querymenu *p = arg;
 524
 525         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 526 }
 527
 528 static void v4l_print_control(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_control *p = arg;
 531
 532         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 533 }
 534
 535 static void v4l_print_ext_controls(const void *arg, bool write_only)
 536 {
 537         const struct v4l2_ext_controls *p = arg;
 538         int i;
 539
 540         pr_cont("class=0x%x, count=%d, error_idx=%d",
 541                         p->ctrl_class, p->count, p->error_idx);
 542         for (i = 0; i < p->count; i++) {
 543                 if (p->controls[i].size)
 544                         pr_cont(", id/val=0x%x/0x%x",
 545                                 p->controls[i].id, p->controls[i].value);
 546                 else
 547                         pr_cont(", id/size=0x%x/%u",
 548                                 p->controls[i].id, p->controls[i].size);
 549         }
 550         pr_cont("\n");
 551 }
 552
 553 static void v4l_print_cropcap(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_cropcap *p = arg;
 556
 557         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 558                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 559                 "pixelaspect %d/%d\n",
 560                 prt_names(p->type, v4l2_type_names),
 561                 p->bounds.width, p->bounds.height,
 562                 p->bounds.left, p->bounds.top,
 563                 p->defrect.width, p->defrect.height,
 564                 p->defrect.left, p->defrect.top,
 565                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 566 }
 567
 568 static void v4l_print_crop(const void *arg, bool write_only)
 569 {
 570         const struct v4l2_crop *p = arg;
 571
 572         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 573                 prt_names(p->type, v4l2_type_names),
 574                 p->c.width, p->c.height,
 575                 p->c.left, p->c.top);
 576 }
 577
 578 static void v4l_print_selection(const void *arg, bool write_only)
 579 {
 580         const struct v4l2_selection *p = arg;
 581
 582         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 583                 prt_names(p->type, v4l2_type_names),
 584                 p->target, p->flags,
 585                 p->r.width, p->r.height, p->r.left, p->r.top);
 586 }
 587
 588 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_jpegcompression *p = arg;
 591
 592         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 593                 "COM_len=%d, jpeg_markers=0x%x\n",
 594                 p->quality, p->APPn, p->APP_len,
 595                 p->COM_len, p->jpeg_markers);
 596 }
 597
 598 static void v4l_print_enc_idx(const void *arg, bool write_only)
 599 {
 600         const struct v4l2_enc_idx *p = arg;
 601
 602         pr_cont("entries=%d, entries_cap=%d\n",
 603                         p->entries, p->entries_cap);
 604 }
 605
 606 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 607 {
 608         const struct v4l2_encoder_cmd *p = arg;
 609
 610         pr_cont("cmd=%d, flags=0x%x\n",
 611                         p->cmd, p->flags);
 612 }
 613
 614 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 615 {
 616         const struct v4l2_decoder_cmd *p = arg;
 617
 618         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 619
 620         if (p->cmd == V4L2_DEC_CMD_START)
 621                 pr_info("speed=%d, format=%u\n",
 622                                 p->start.speed, p->start.format);
 623         else if (p->cmd == V4L2_DEC_CMD_STOP)
 624                 pr_info("pts=%llu\n", p->stop.pts);
 625 }
 626
 627 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_dbg_chip_ident *p = arg;
 630
 631         pr_cont("type=%u, ", p->match.type);
 632         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 633                 pr_cont("name=%.*s, ",
 634                                 (int)sizeof(p->match.name), p->match.name);
 635         else
 636                 pr_cont("addr=%u, ", p->match.addr);
 637         pr_cont("chip_ident=%u, revision=0x%x\n",
 638                         p->ident, p->revision);
 639 }
 640
 641 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 642 {
 643         const struct v4l2_dbg_chip_info *p = arg;
 644
 645         pr_cont("type=%u, ", p->match.type);
 646         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 647                 pr_cont("name=%.*s, ",
 648                                 (int)sizeof(p->match.name), p->match.name);
 649         else
 650                 pr_cont("addr=%u, ", p->match.addr);
 651         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 652 }
 653
 654 static void v4l_print_dbg_register(const void *arg, bool write_only)
 655 {
 656         const struct v4l2_dbg_register *p = arg;
 657
 658         pr_cont("type=%u, ", p->match.type);
 659         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 660                 pr_cont("name=%.*s, ",
 661                                 (int)sizeof(p->match.name), p->match.name);
 662         else
 663                 pr_cont("addr=%u, ", p->match.addr);
 664         pr_cont("reg=0x%llx, val=0x%llx\n",
 665                         p->reg, p->val);
 666 }
 667
 668 static void v4l_print_dv_timings(const void *arg, bool write_only)
 669 {
 670         const struct v4l2_dv_timings *p = arg;
 671
 672         switch (p->type) {
 673         case V4L2_DV_BT_656_1120:
 674                 pr_cont("type=bt-656/1120, interlaced=%u, "
 675                         "pixelclock=%llu, "
 676                         "width=%u, height=%u, polarities=0x%x, "
 677                         "hfrontporch=%u, hsync=%u, "
 678                         "hbackporch=%u, vfrontporch=%u, "
 679                         "vsync=%u, vbackporch=%u, "
 680                         "il_vfrontporch=%u, il_vsync=%u, "
 681                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 682                                 p->bt.interlaced, p->bt.pixelclock,
 683                                 p->bt.width, p->bt.height,
 684                                 p->bt.polarities, p->bt.hfrontporch,
 685                                 p->bt.hsync, p->bt.hbackporch,
 686                                 p->bt.vfrontporch, p->bt.vsync,
 687                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 688                                 p->bt.il_vsync, p->bt.il_vbackporch,
 689                                 p->bt.standards, p->bt.flags);
 690                 break;
 691         default:
 692                 pr_cont("type=%d\n", p->type);
 693                 break;
 694         }
 695 }
 696
 697 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 698 {
 699         const struct v4l2_enum_dv_timings *p = arg;
 700
 701         pr_cont("index=%u, ", p->index);
 702         v4l_print_dv_timings(&p->timings, write_only);
 703 }
 704
 705 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 706 {
 707         const struct v4l2_dv_timings_cap *p = arg;
 708
 709         switch (p->type) {
 710         case V4L2_DV_BT_656_1120:
 711                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 712                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 713                         p->bt.min_width, p->bt.max_width,
 714                         p->bt.min_height, p->bt.max_height,
 715                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 716                         p->bt.standards, p->bt.capabilities);
 717                 break;
 718         default:
 719                 pr_cont("type=%u\n", p->type);
 720                 break;
 721         }
 722 }
 723
 724 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 725 {
 726         const struct v4l2_frmsizeenum *p = arg;
 727
 728         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 729                         p->index,
 730                         (p->pixel_format & 0xff),
 731                         (p->pixel_format >>  8) & 0xff,
 732                         (p->pixel_format >> 16) & 0xff,
 733                         (p->pixel_format >> 24) & 0xff,
 734                         p->type);
 735         switch (p->type) {
 736         case V4L2_FRMSIZE_TYPE_DISCRETE:
 737                 pr_cont(" wxh=%ux%u\n",
 738                         p->discrete.width, p->discrete.height);
 739                 break;
 740         case V4L2_FRMSIZE_TYPE_STEPWISE:
 741                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 742                                 p->stepwise.min_width,  p->stepwise.min_height,
 743                                 p->stepwise.step_width, p->stepwise.step_height,
 744                                 p->stepwise.max_width,  p->stepwise.max_height);
 745                 break;
 746         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 747                 /* fall through */
 748         default:
 749                 pr_cont("\n");
 750                 break;
 751         }
 752 }
 753
 754 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 755 {
 756         const struct v4l2_frmivalenum *p = arg;
 757
 758         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 759                         p->index,
 760                         (p->pixel_format & 0xff),
 761                         (p->pixel_format >>  8) & 0xff,
 762                         (p->pixel_format >> 16) & 0xff,
 763                         (p->pixel_format >> 24) & 0xff,
 764                         p->width, p->height, p->type);
 765         switch (p->type) {
 766         case V4L2_FRMIVAL_TYPE_DISCRETE:
 767                 pr_cont(" fps=%d/%d\n",
 768                                 p->discrete.numerator,
 769                                 p->discrete.denominator);
 770                 break;
 771         case V4L2_FRMIVAL_TYPE_STEPWISE:
 772                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 773                                 p->stepwise.min.numerator,
 774                                 p->stepwise.min.denominator,
 775                                 p->stepwise.max.numerator,
 776                                 p->stepwise.max.denominator,
 777                                 p->stepwise.step.numerator,
 778                                 p->stepwise.step.denominator);
 779                 break;
 780         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 781                 /* fall through */
 782         default:
 783                 pr_cont("\n");
 784                 break;
 785         }
 786 }
 787
 788 static void v4l_print_event(const void *arg, bool write_only)
 789 {
 790         const struct v4l2_event *p = arg;
 791         const struct v4l2_event_ctrl *c;
 792
 793         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 794                 "timestamp=%lu.%9.9lu\n",
 795                         p->type, p->pending, p->sequence, p->id,
 796                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 797         switch (p->type) {
 798         case V4L2_EVENT_VSYNC:
 799                 printk(KERN_DEBUG "field=%s\n",
 800                         prt_names(p->u.vsync.field, v4l2_field_names));
 801                 break;
 802         case V4L2_EVENT_CTRL:
 803                 c = &p->u.ctrl;
 804                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 805                         c->changes, c->type);
 806                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 807                         pr_cont("value64=%lld, ", c->value64);
 808                 else
 809                         pr_cont("value=%d, ", c->value);
 810                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 811                                 " default_value=%d\n",
 812                         c->flags, c->minimum, c->maximum,
 813                         c->step, c->default_value);
 814                 break;
 815         case V4L2_EVENT_FRAME_SYNC:
 816                 pr_cont("frame_sequence=%u\n",
 817                         p->u.frame_sync.frame_sequence);
 818                 break;
 819         }
 820 }
 821
 822 static void v4l_print_event_subscription(const void *arg, bool write_only)
 823 {
 824         const struct v4l2_event_subscription *p = arg;
 825
 826         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 827                         p->type, p->id, p->flags);
 828 }
 829
 830 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 831 {
 832         const struct v4l2_sliced_vbi_cap *p = arg;
 833         int i;
 834
 835         pr_cont("type=%s, service_set=0x%08x\n",
 836                         prt_names(p->type, v4l2_type_names), p->service_set);
 837         for (i = 0; i < 24; i++)
 838                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 839                                 p->service_lines[0][i],
 840                                 p->service_lines[1][i]);
 841 }
 842
 843 static void v4l_print_freq_band(const void *arg, bool write_only)
 844 {
 845         const struct v4l2_frequency_band *p = arg;
 846
 847         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 848                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 849                         p->tuner, p->type, p->index,
 850                         p->capability, p->rangelow,
 851                         p->rangehigh, p->modulation);
 852 }
 853
 854 static void v4l_print_u32(const void *arg, bool write_only)
 855 {
 856         pr_cont("value=%u\n", *(const u32 *)arg);
 857 }
 858
 859 static void v4l_print_newline(const void *arg, bool write_only)
 860 {
 861         pr_cont("\n");
 862 }
 863
 864 static void v4l_print_default(const void *arg, bool write_only)
 865 {
 866         pr_cont("driver-specific ioctl\n");
 867 }
 868
 869 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 870 {
 871         __u32 i;
 872
 873         /* zero the reserved fields */
 874         c->reserved[0] = c->reserved[1] = 0;
 875         for (i = 0; i < c->count; i++)
 876                 c->controls[i].reserved2[0] = 0;
 877
 878         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 879            when using extended controls.
 880            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 881            is it allowed for backwards compatibility.
 882          */
 883         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 884                 return 0;
 885         /* Check that all controls are from the same control class. */
 886         for (i = 0; i < c->count; i++) {
 887                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 888                         c->error_idx = i;
 889                         return 0;
 890                 }
 891         }
 892         return 1;
 893 }
 894
 895 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 896 {
 897         struct video_device *vfd = video_devdata(file);
 898         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 899         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 900         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 901         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 902         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 903
 904         if (ops == NULL)
 905                 return -EINVAL;
 906
 907         switch (type) {
 908         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 909                 if (is_vid && is_rx &&
 910                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 911                         return 0;
 912                 break;
 913         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 914                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 915                         return 0;
 916                 break;
 917         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 918                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 919                         return 0;
 920                 break;
 921         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 922                 if (is_vid && is_tx &&
 923                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 924                         return 0;
 925                 break;
 926         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 927                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 928                         return 0;
 929                 break;
 930         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 931                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 932                         return 0;
 933                 break;
 934         case V4L2_BUF_TYPE_VBI_CAPTURE:
 935                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 936                         return 0;
 937                 break;
 938         case V4L2_BUF_TYPE_VBI_OUTPUT:
 939                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 940                         return 0;
 941                 break;
 942         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 943                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 944                         return 0;
 945                 break;
 946         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 947                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 948                         return 0;
 949                 break;
 950         default:
 951                 break;
 952         }
 953         return -EINVAL;
 954 }
 955
 956 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 957                                 struct file *file, void *fh, void *arg)
 958 {
 959         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 960
 961         cap->version = LINUX_VERSION_CODE;
 962         return ops->vidioc_querycap(file, fh, cap);
 963 }
 964
 965 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 966                                 struct file *file, void *fh, void *arg)
 967 {
 968         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 969 }
 970
 971 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 972                                 struct file *file, void *fh, void *arg)
 973 {
 974         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 975 }
 976
 977 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 978                                 struct file *file, void *fh, void *arg)
 979 {
 980         struct video_device *vfd;
 981         u32 *p = arg;
 982
 983         if (ops->vidioc_g_priority)
 984                 return ops->vidioc_g_priority(file, fh, arg);
 985         vfd = video_devdata(file);
 986         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 987         return 0;
 988 }
 989
 990 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 991                                 struct file *file, void *fh, void *arg)
 992 {
 993         struct video_device *vfd;
 994         struct v4l2_fh *vfh;
 995         u32 *p = arg;
 996
 997         if (ops->vidioc_s_priority)
 998                 return ops->vidioc_s_priority(file, fh, *p);
 999         vfd = video_devdata(file);
1000         vfh = file->private_data;
1001         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1002 }
1003
1004 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1005                                 struct file *file, void *fh, void *arg)
1006 {
1007         struct video_device *vfd = video_devdata(file);
1008         struct v4l2_input *p = arg;
1009
1010         /*
1011          * We set the flags for CAP_DV_TIMINGS &
1012          * CAP_STD here based on ioctl handler provided by the
1013          * driver. If the driver doesn't support these
1014          * for a specific input, it must override these flags.
1015          */
1016         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1017                 p->capabilities |= V4L2_IN_CAP_STD;
1018
1019         return ops->vidioc_enum_input(file, fh, p);
1020 }
1021
1022 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1023                                 struct file *file, void *fh, void *arg)
1024 {
1025         struct video_device *vfd = video_devdata(file);
1026         struct v4l2_output *p = arg;
1027
1028         /*
1029          * We set the flags for CAP_DV_TIMINGS &
1030          * CAP_STD here based on ioctl handler provided by the
1031          * driver. If the driver doesn't support these
1032          * for a specific output, it must override these flags.
1033          */
1034         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1035                 p->capabilities |= V4L2_OUT_CAP_STD;
1036
1037         return ops->vidioc_enum_output(file, fh, p);
1038 }
1039
1040 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1041                                 struct file *file, void *fh, void *arg)
1042 {
1043         struct v4l2_fmtdesc *p = arg;
1044         struct video_device *vfd = video_devdata(file);
1045         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1046         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1047
1048         switch (p->type) {
1049         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1050                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1051                         break;
1052                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1053         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1054                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1055                         break;
1056                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1057         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1058                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1059                         break;
1060                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1061         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1062                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1063                         break;
1064                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1065         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1066                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1067                         break;
1068                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1069         }
1070         return -EINVAL;
1071 }
1072
1073 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1074                                 struct file *file, void *fh, void *arg)
1075 {
1076         struct v4l2_format *p = arg;
1077         struct video_device *vfd = video_devdata(file);
1078         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1079         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1080         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1081
1082         switch (p->type) {
1083         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1084                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1085                         break;
1086                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1087         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1088                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1089                         break;
1090                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1091         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1092                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1093                         break;
1094                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1095         case V4L2_BUF_TYPE_VBI_CAPTURE:
1096                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1097                         break;
1098                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1099         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1100                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1101                         break;
1102                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1103         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1104                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1105                         break;
1106                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1107         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1108                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1109                         break;
1110                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1111         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1112                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1113                         break;
1114                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1115         case V4L2_BUF_TYPE_VBI_OUTPUT:
1116                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1117                         break;
1118                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1119         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1120                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1121                         break;
1122                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1123         }
1124         return -EINVAL;
1125 }
1126
1127 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1128                                 struct file *file, void *fh, void *arg)
1129 {
1130         struct v4l2_format *p = arg;
1131         struct video_device *vfd = video_devdata(file);
1132         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1133         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1134         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1135
1136         switch (p->type) {
1137         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1138                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1139                         break;
1140                 CLEAR_AFTER_FIELD(p, fmt.pix);
1141                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1142         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1143                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1144                         break;
1145                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1146                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1147         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1148                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1149                         break;
1150                 CLEAR_AFTER_FIELD(p, fmt.win);
1151                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1152         case V4L2_BUF_TYPE_VBI_CAPTURE:
1153                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1154                         break;
1155                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1156                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1157         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1158                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1159                         break;
1160                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1161                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1162         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1163                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1164                         break;
1165                 CLEAR_AFTER_FIELD(p, fmt.pix);
1166                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1167         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1168                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1169                         break;
1170                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1171                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1172         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1173                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1174                         break;
1175                 CLEAR_AFTER_FIELD(p, fmt.win);
1176                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1177         case V4L2_BUF_TYPE_VBI_OUTPUT:
1178                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1179                         break;
1180                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1181                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1182         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1183                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1184                         break;
1185                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1186                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1187         }
1188         return -EINVAL;
1189 }
1190
1191 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1192                                 struct file *file, void *fh, void *arg)
1193 {
1194         struct v4l2_format *p = arg;
1195         struct video_device *vfd = video_devdata(file);
1196         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1197         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1198         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1199
1200         switch (p->type) {
1201         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1202                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1203                         break;
1204                 CLEAR_AFTER_FIELD(p, fmt.pix);
1205                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1206         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1207                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1208                         break;
1209                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1210                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1211         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1212                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1213                         break;
1214                 CLEAR_AFTER_FIELD(p, fmt.win);
1215                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1216         case V4L2_BUF_TYPE_VBI_CAPTURE:
1217                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1218                         break;
1219                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1220                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1221         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1222                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1223                         break;
1224                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1225                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1226         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1227                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1228                         break;
1229                 CLEAR_AFTER_FIELD(p, fmt.pix);
1230                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1231         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1232                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1233                         break;
1234                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1235                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1236         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1237                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1238                         break;
1239                 CLEAR_AFTER_FIELD(p, fmt.win);
1240                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1241         case V4L2_BUF_TYPE_VBI_OUTPUT:
1242                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1243                         break;
1244                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1245                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1246         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1247                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1248                         break;
1249                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1250                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1251         }
1252         return -EINVAL;
1253 }
1254
1255 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1256                                 struct file *file, void *fh, void *arg)
1257 {
1258         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1259 }
1260
1261 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1262                                 struct file *file, void *fh, void *arg)
1263 {
1264         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1265 }
1266
1267 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1268                                 struct file *file, void *fh, void *arg)
1269 {
1270         struct video_device *vfd = video_devdata(file);
1271         struct v4l2_tuner *p = arg;
1272         int err;
1273
1274         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1275                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1276         err = ops->vidioc_g_tuner(file, fh, p);
1277         if (!err)
1278                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1279         return err;
1280 }
1281
1282 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1283                                 struct file *file, void *fh, void *arg)
1284 {
1285         struct video_device *vfd = video_devdata(file);
1286         struct v4l2_tuner *p = arg;
1287
1288         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1289                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1290         return ops->vidioc_s_tuner(file, fh, p);
1291 }
1292
1293 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1294                                 struct file *file, void *fh, void *arg)
1295 {
1296         struct v4l2_modulator *p = arg;
1297         int err;
1298
1299         err = ops->vidioc_g_modulator(file, fh, p);
1300         if (!err)
1301                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1302         return err;
1303 }
1304
1305 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1306                                 struct file *file, void *fh, void *arg)
1307 {
1308         struct video_device *vfd = video_devdata(file);
1309         struct v4l2_frequency *p = arg;
1310
1311         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1312                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1313         return ops->vidioc_g_frequency(file, fh, p);
1314 }
1315
1316 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1317                                 struct file *file, void *fh, void *arg)
1318 {
1319         struct video_device *vfd = video_devdata(file);
1320         const struct v4l2_frequency *p = arg;
1321         enum v4l2_tuner_type type;
1322
1323         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1324                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1325         if (p->type != type)
1326                 return -EINVAL;
1327         return ops->vidioc_s_frequency(file, fh, p);
1328 }
1329
1330 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1331                                 struct file *file, void *fh, void *arg)
1332 {
1333         struct video_device *vfd = video_devdata(file);
1334         struct v4l2_standard *p = arg;
1335         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1336         unsigned int index = p->index, i, j = 0;
1337         const char *descr = "";
1338
1339         /* Return -ENODATA if the tvnorms for the current input
1340            or output is 0, meaning that it doesn't support this API. */
1341         if (id == 0)
1342                 return -ENODATA;
1343
1344         /* Return norm array in a canonical way */
1345         for (i = 0; i <= index && id; i++) {
1346                 /* last std value in the standards array is 0, so this
1347                    while always ends there since (id & 0) == 0. */
1348                 while ((id & standards[j].std) != standards[j].std)
1349                         j++;
1350                 curr_id = standards[j].std;
1351                 descr = standards[j].descr;
1352                 j++;
1353                 if (curr_id == 0)
1354                         break;
1355                 if (curr_id != V4L2_STD_PAL &&
1356                                 curr_id != V4L2_STD_SECAM &&
1357                                 curr_id != V4L2_STD_NTSC)
1358                         id &= ~curr_id;
1359         }
1360         if (i <= index)
1361                 return -EINVAL;
1362
1363         v4l2_video_std_construct(p, curr_id, descr);
1364         return 0;
1365 }
1366
1367 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1368                                 struct file *file, void *fh, void *arg)
1369 {
1370         struct video_device *vfd = video_devdata(file);
1371         v4l2_std_id *id = arg;
1372
1373         /* Calls the specific handler */
1374         if (ops->vidioc_g_std)
1375                 return ops->vidioc_g_std(file, fh, arg);
1376         if (vfd->current_norm) {
1377                 *id = vfd->current_norm;
1378                 return 0;
1379         }
1380         return -ENOTTY;
1381 }
1382
1383 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1384                                 struct file *file, void *fh, void *arg)
1385 {
1386         struct video_device *vfd = video_devdata(file);
1387         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1388         int ret;
1389
1390         norm = id & vfd->tvnorms;
1391         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1392                 return -EINVAL;
1393
1394         /* Calls the specific handler */
1395         ret = ops->vidioc_s_std(file, fh, norm);
1396
1397         /* Updates standard information */
1398         if (ret >= 0)
1399                 vfd->current_norm = norm;
1400         return ret;
1401 }
1402
1403 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1404                                 struct file *file, void *fh, void *arg)
1405 {
1406         struct video_device *vfd = video_devdata(file);
1407         v4l2_std_id *p = arg;
1408
1409         /*
1410          * If nothing detected, it should return all supported
1411          * standard.
1412          * Drivers just need to mask the std argument, in order
1413          * to remove the standards that don't apply from the mask.
1414          * This means that tuners, audio and video decoders can join
1415          * their efforts to improve the standards detection.
1416          */
1417         *p = vfd->tvnorms;
1418         return ops->vidioc_querystd(file, fh, arg);
1419 }
1420
1421 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1422                                 struct file *file, void *fh, void *arg)
1423 {
1424         struct video_device *vfd = video_devdata(file);
1425         struct v4l2_hw_freq_seek *p = arg;
1426         enum v4l2_tuner_type type;
1427
1428         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1429                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1430         if (p->type != type)
1431                 return -EINVAL;
1432         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1433 }
1434
1435 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1436                                 struct file *file, void *fh, void *arg)
1437 {
1438         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1439 }
1440
1441 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1442                                 struct file *file, void *fh, void *arg)
1443 {
1444         struct v4l2_requestbuffers *p = arg;
1445         int ret = check_fmt(file, p->type);
1446
1447         if (ret)
1448                 return ret;
1449
1450         CLEAR_AFTER_FIELD(p, memory);
1451
1452         return ops->vidioc_reqbufs(file, fh, p);
1453 }
1454
1455 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1456                                 struct file *file, void *fh, void *arg)
1457 {
1458         struct v4l2_buffer *p = arg;
1459         int ret = check_fmt(file, p->type);
1460
1461         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1462 }
1463
1464 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1465                                 struct file *file, void *fh, void *arg)
1466 {
1467         struct v4l2_buffer *p = arg;
1468         int ret = check_fmt(file, p->type);
1469
1470         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1471 }
1472
1473 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1474                                 struct file *file, void *fh, void *arg)
1475 {
1476         struct v4l2_buffer *p = arg;
1477         int ret = check_fmt(file, p->type);
1478
1479         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1480 }
1481
1482 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1483                                 struct file *file, void *fh, void *arg)
1484 {
1485         struct v4l2_create_buffers *create = arg;
1486         int ret = check_fmt(file, create->format.type);
1487
1488         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1489 }
1490
1491 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1492                                 struct file *file, void *fh, void *arg)
1493 {
1494         struct v4l2_buffer *b = arg;
1495         int ret = check_fmt(file, b->type);
1496
1497         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1498 }
1499
1500 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1501                                 struct file *file, void *fh, void *arg)
1502 {
1503         struct video_device *vfd = video_devdata(file);
1504         struct v4l2_streamparm *p = arg;
1505         v4l2_std_id std;
1506         int ret = check_fmt(file, p->type);
1507
1508         if (ret)
1509                 return ret;
1510         if (ops->vidioc_g_parm)
1511                 return ops->vidioc_g_parm(file, fh, p);
1512         std = vfd->current_norm;
1513         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1514             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1515                 return -EINVAL;
1516         p->parm.capture.readbuffers = 2;
1517         if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std)
1518                 ret = ops->vidioc_g_std(file, fh, &std);
1519         if (ret == 0)
1520                 v4l2_video_std_frame_period(std,
1521                             &p->parm.capture.timeperframe);
1522         return ret;
1523 }
1524
1525 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1526                                 struct file *file, void *fh, void *arg)
1527 {
1528         struct v4l2_streamparm *p = arg;
1529         int ret = check_fmt(file, p->type);
1530
1531         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1532 }
1533
1534 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1535                                 struct file *file, void *fh, void *arg)
1536 {
1537         struct video_device *vfd = video_devdata(file);
1538         struct v4l2_queryctrl *p = arg;
1539         struct v4l2_fh *vfh =
1540                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1541
1542         if (vfh && vfh->ctrl_handler)
1543                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1544         if (vfd->ctrl_handler)
1545                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1546         if (ops->vidioc_queryctrl)
1547                 return ops->vidioc_queryctrl(file, fh, p);
1548         return -ENOTTY;
1549 }
1550
1551 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1552                                 struct file *file, void *fh, void *arg)
1553 {
1554         struct video_device *vfd = video_devdata(file);
1555         struct v4l2_querymenu *p = arg;
1556         struct v4l2_fh *vfh =
1557                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1558
1559         if (vfh && vfh->ctrl_handler)
1560                 return v4l2_querymenu(vfh->ctrl_handler, p);
1561         if (vfd->ctrl_handler)
1562                 return v4l2_querymenu(vfd->ctrl_handler, p);
1563         if (ops->vidioc_querymenu)
1564                 return ops->vidioc_querymenu(file, fh, p);
1565         return -ENOTTY;
1566 }
1567
1568 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1569                                 struct file *file, void *fh, void *arg)
1570 {
1571         struct video_device *vfd = video_devdata(file);
1572         struct v4l2_control *p = arg;
1573         struct v4l2_fh *vfh =
1574                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1575         struct v4l2_ext_controls ctrls;
1576         struct v4l2_ext_control ctrl;
1577
1578         if (vfh && vfh->ctrl_handler)
1579                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1580         if (vfd->ctrl_handler)
1581                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1582         if (ops->vidioc_g_ctrl)
1583                 return ops->vidioc_g_ctrl(file, fh, p);
1584         if (ops->vidioc_g_ext_ctrls == NULL)
1585                 return -ENOTTY;
1586
1587         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1588         ctrls.count = 1;
1589         ctrls.controls = &ctrl;
1590         ctrl.id = p->id;
1591         ctrl.value = p->value;
1592         if (check_ext_ctrls(&ctrls, 1)) {
1593                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1594
1595                 if (ret == 0)
1596                         p->value = ctrl.value;
1597                 return ret;
1598         }
1599         return -EINVAL;
1600 }
1601
1602 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1603                                 struct file *file, void *fh, void *arg)
1604 {
1605         struct video_device *vfd = video_devdata(file);
1606         struct v4l2_control *p = arg;
1607         struct v4l2_fh *vfh =
1608                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1609         struct v4l2_ext_controls ctrls;
1610         struct v4l2_ext_control ctrl;
1611
1612         if (vfh && vfh->ctrl_handler)
1613                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1614         if (vfd->ctrl_handler)
1615                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1616         if (ops->vidioc_s_ctrl)
1617                 return ops->vidioc_s_ctrl(file, fh, p);
1618         if (ops->vidioc_s_ext_ctrls == NULL)
1619                 return -ENOTTY;
1620
1621         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1622         ctrls.count = 1;
1623         ctrls.controls = &ctrl;
1624         ctrl.id = p->id;
1625         ctrl.value = p->value;
1626         if (check_ext_ctrls(&ctrls, 1))
1627                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1628         return -EINVAL;
1629 }
1630
1631 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1632                                 struct file *file, void *fh, void *arg)
1633 {
1634         struct video_device *vfd = video_devdata(file);
1635         struct v4l2_ext_controls *p = arg;
1636         struct v4l2_fh *vfh =
1637                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1638
1639         p->error_idx = p->count;
1640         if (vfh && vfh->ctrl_handler)
1641                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1642         if (vfd->ctrl_handler)
1643                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1644         if (ops->vidioc_g_ext_ctrls == NULL)
1645                 return -ENOTTY;
1646         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1647                                         -EINVAL;
1648 }
1649
1650 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1651                                 struct file *file, void *fh, void *arg)
1652 {
1653         struct video_device *vfd = video_devdata(file);
1654         struct v4l2_ext_controls *p = arg;
1655         struct v4l2_fh *vfh =
1656                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1657
1658         p->error_idx = p->count;
1659         if (vfh && vfh->ctrl_handler)
1660                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1661         if (vfd->ctrl_handler)
1662                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1663         if (ops->vidioc_s_ext_ctrls == NULL)
1664                 return -ENOTTY;
1665         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1666                                         -EINVAL;
1667 }
1668
1669 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1670                                 struct file *file, void *fh, void *arg)
1671 {
1672         struct video_device *vfd = video_devdata(file);
1673         struct v4l2_ext_controls *p = arg;
1674         struct v4l2_fh *vfh =
1675                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1676
1677         p->error_idx = p->count;
1678         if (vfh && vfh->ctrl_handler)
1679                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1680         if (vfd->ctrl_handler)
1681                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1682         if (ops->vidioc_try_ext_ctrls == NULL)
1683                 return -ENOTTY;
1684         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1685                                         -EINVAL;
1686 }
1687
1688 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1689                                 struct file *file, void *fh, void *arg)
1690 {
1691         struct v4l2_crop *p = arg;
1692         struct v4l2_selection s = {
1693                 .type = p->type,
1694         };
1695         int ret;
1696
1697         if (ops->vidioc_g_crop)
1698                 return ops->vidioc_g_crop(file, fh, p);
1699         /* simulate capture crop using selection api */
1700
1701         /* crop means compose for output devices */
1702         if (V4L2_TYPE_IS_OUTPUT(p->type))
1703                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1704         else
1705                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1706
1707         ret = ops->vidioc_g_selection(file, fh, &s);
1708
1709         /* copying results to old structure on success */
1710         if (!ret)
1711                 p->c = s.r;
1712         return ret;
1713 }
1714
1715 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1716                                 struct file *file, void *fh, void *arg)
1717 {
1718         struct v4l2_crop *p = arg;
1719         struct v4l2_selection s = {
1720                 .type = p->type,
1721                 .r = p->c,
1722         };
1723
1724         if (ops->vidioc_s_crop)
1725                 return ops->vidioc_s_crop(file, fh, p);
1726         /* simulate capture crop using selection api */
1727
1728         /* crop means compose for output devices */
1729         if (V4L2_TYPE_IS_OUTPUT(p->type))
1730                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1731         else
1732                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1733
1734         return ops->vidioc_s_selection(file, fh, &s);
1735 }
1736
1737 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1738                                 struct file *file, void *fh, void *arg)
1739 {
1740         struct v4l2_cropcap *p = arg;
1741         struct v4l2_selection s = { .type = p->type };
1742         int ret;
1743
1744         if (ops->vidioc_cropcap)
1745                 return ops->vidioc_cropcap(file, fh, p);
1746
1747         /* obtaining bounds */
1748         if (V4L2_TYPE_IS_OUTPUT(p->type))
1749                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1750         else
1751                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1752
1753         ret = ops->vidioc_g_selection(file, fh, &s);
1754         if (ret)
1755                 return ret;
1756         p->bounds = s.r;
1757
1758         /* obtaining defrect */
1759         if (V4L2_TYPE_IS_OUTPUT(p->type))
1760                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1761         else
1762                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1763
1764         ret = ops->vidioc_g_selection(file, fh, &s);
1765         if (ret)
1766                 return ret;
1767         p->defrect = s.r;
1768
1769         /* setting trivial pixelaspect */
1770         p->pixelaspect.numerator = 1;
1771         p->pixelaspect.denominator = 1;
1772         return 0;
1773 }
1774
1775 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1776                                 struct file *file, void *fh, void *arg)
1777 {
1778         struct video_device *vfd = video_devdata(file);
1779         int ret;
1780
1781         if (vfd->v4l2_dev)
1782                 pr_info("%s: =================  START STATUS  =================\n",
1783                         vfd->v4l2_dev->name);
1784         ret = ops->vidioc_log_status(file, fh);
1785         if (vfd->v4l2_dev)
1786                 pr_info("%s: ==================  END STATUS  ==================\n",
1787                         vfd->v4l2_dev->name);
1788         return ret;
1789 }
1790
1791 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1792                                 struct file *file, void *fh, void *arg)
1793 {
1794 #ifdef CONFIG_VIDEO_ADV_DEBUG
1795         struct v4l2_dbg_register *p = arg;
1796         struct video_device *vfd = video_devdata(file);
1797         struct v4l2_subdev *sd;
1798         int idx = 0;
1799
1800         if (!capable(CAP_SYS_ADMIN))
1801                 return -EPERM;
1802         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1803                 if (vfd->v4l2_dev == NULL)
1804                         return -EINVAL;
1805                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1806                         if (p->match.addr == idx++)
1807                                 return v4l2_subdev_call(sd, core, g_register, p);
1808                 return -EINVAL;
1809         }
1810         if (ops->vidioc_g_register)
1811                 return ops->vidioc_g_register(file, fh, p);
1812         return -EINVAL;
1813 #else
1814         return -ENOTTY;
1815 #endif
1816 }
1817
1818 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1819                                 struct file *file, void *fh, void *arg)
1820 {
1821 #ifdef CONFIG_VIDEO_ADV_DEBUG
1822         const struct v4l2_dbg_register *p = arg;
1823         struct video_device *vfd = video_devdata(file);
1824         struct v4l2_subdev *sd;
1825         int idx = 0;
1826
1827         if (!capable(CAP_SYS_ADMIN))
1828                 return -EPERM;
1829         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1830                 if (vfd->v4l2_dev == NULL)
1831                         return -EINVAL;
1832                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1833                         if (p->match.addr == idx++)
1834                                 return v4l2_subdev_call(sd, core, s_register, p);
1835                 return -EINVAL;
1836         }
1837         if (ops->vidioc_s_register)
1838                 return ops->vidioc_s_register(file, fh, p);
1839         return -EINVAL;
1840 #else
1841         return -ENOTTY;
1842 #endif
1843 }
1844
1845 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1846                                 struct file *file, void *fh, void *arg)
1847 {
1848         struct v4l2_dbg_chip_ident *p = arg;
1849
1850         p->ident = V4L2_IDENT_NONE;
1851         p->revision = 0;
1852         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV)
1853                 return -EINVAL;
1854         return ops->vidioc_g_chip_ident(file, fh, p);
1855 }
1856
1857 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1858                                 struct file *file, void *fh, void *arg)
1859 {
1860 #ifdef CONFIG_VIDEO_ADV_DEBUG
1861         struct video_device *vfd = video_devdata(file);
1862         struct v4l2_dbg_chip_info *p = arg;
1863         struct v4l2_subdev *sd;
1864         int idx = 0;
1865
1866         switch (p->match.type) {
1867         case V4L2_CHIP_MATCH_BRIDGE:
1868                 if (ops->vidioc_s_register)
1869                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1870                 if (ops->vidioc_g_register)
1871                         p->flags |= V4L2_CHIP_FL_READABLE;
1872                 if (vfd->v4l2_dev)
1873                         strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1874                 else if (vfd->parent)
1875                         strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name));
1876                 else
1877                         strlcpy(p->name, "bridge", sizeof(p->name));
1878                 if (ops->vidioc_g_chip_info)
1879                         return ops->vidioc_g_chip_info(file, fh, arg);
1880                 if (p->match.addr)
1881                         return -EINVAL;
1882                 return 0;
1883
1884         case V4L2_CHIP_MATCH_SUBDEV:
1885                 if (vfd->v4l2_dev == NULL)
1886                         break;
1887                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1888                         if (p->match.addr != idx++)
1889                                 continue;
1890                         if (sd->ops->core && sd->ops->core->s_register)
1891                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
1892                         if (sd->ops->core && sd->ops->core->g_register)
1893                                 p->flags |= V4L2_CHIP_FL_READABLE;
1894                         strlcpy(p->name, sd->name, sizeof(p->name));
1895                         return 0;
1896                 }
1897                 break;
1898         }
1899         return -EINVAL;
1900 #else
1901         return -ENOTTY;
1902 #endif
1903 }
1904
1905 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1906                                 struct file *file, void *fh, void *arg)
1907 {
1908         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1909 }
1910
1911 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1912                                 struct file *file, void *fh, void *arg)
1913 {
1914         return ops->vidioc_subscribe_event(fh, arg);
1915 }
1916
1917 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1918                                 struct file *file, void *fh, void *arg)
1919 {
1920         return ops->vidioc_unsubscribe_event(fh, arg);
1921 }
1922
1923 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1924                                 struct file *file, void *fh, void *arg)
1925 {
1926         struct v4l2_sliced_vbi_cap *p = arg;
1927         int ret = check_fmt(file, p->type);
1928
1929         if (ret)
1930                 return ret;
1931
1932         /* Clear up to type, everything after type is zeroed already */
1933         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1934
1935         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1936 }
1937
1938 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1939                                 struct file *file, void *fh, void *arg)
1940 {
1941         struct video_device *vfd = video_devdata(file);
1942         struct v4l2_frequency_band *p = arg;
1943         enum v4l2_tuner_type type;
1944         int err;
1945
1946         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1947                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1948
1949         if (type != p->type)
1950                 return -EINVAL;
1951         if (ops->vidioc_enum_freq_bands)
1952                 return ops->vidioc_enum_freq_bands(file, fh, p);
1953         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1954                 struct v4l2_tuner t = {
1955                         .index = p->tuner,
1956                         .type = type,
1957                 };
1958
1959                 if (p->index)
1960                         return -EINVAL;
1961                 err = ops->vidioc_g_tuner(file, fh, &t);
1962                 if (err)
1963                         return err;
1964                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1965                 p->rangelow = t.rangelow;
1966                 p->rangehigh = t.rangehigh;
1967                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1968                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1969                 return 0;
1970         }
1971         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1972                 struct v4l2_modulator m = {
1973                         .index = p->tuner,
1974                 };
1975
1976                 if (type != V4L2_TUNER_RADIO)
1977                         return -EINVAL;
1978                 if (p->index)
1979                         return -EINVAL;
1980                 err = ops->vidioc_g_modulator(file, fh, &m);
1981                 if (err)
1982                         return err;
1983                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1984                 p->rangelow = m.rangelow;
1985                 p->rangehigh = m.rangehigh;
1986                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1987                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1988                 return 0;
1989         }
1990         return -ENOTTY;
1991 }
1992
1993 struct v4l2_ioctl_info {
1994         unsigned int ioctl;
1995         u32 flags;
1996         const char * const name;
1997         union {
1998                 u32 offset;
1999                 int (*func)(const struct v4l2_ioctl_ops *ops,
2000                                 struct file *file, void *fh, void *p);
2001         } u;
2002         void (*debug)(const void *arg, bool write_only);
2003 };
2004
2005 /* This control needs a priority check */
2006 #define INFO_FL_PRIO    (1 << 0)
2007 /* This control can be valid if the filehandle passes a control handler. */
2008 #define INFO_FL_CTRL    (1 << 1)
2009 /* This is a standard ioctl, no need for special code */
2010 #define INFO_FL_STD     (1 << 2)
2011 /* This is ioctl has its own function */
2012 #define INFO_FL_FUNC    (1 << 3)
2013 /* Queuing ioctl */
2014 #define INFO_FL_QUEUE   (1 << 4)
2015 /* Zero struct from after the field to the end */
2016 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2017         ((offsetof(struct v4l2_struct, field) +                 \
2018           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2019 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2020
2021 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2022         [_IOC_NR(_ioctl)] = {                                           \
2023                 .ioctl = _ioctl,                                        \
2024                 .flags = _flags | INFO_FL_STD,                          \
2025                 .name = #_ioctl,                                        \
2026                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2027                 .debug = _debug,                                        \
2028         }
2029
2030 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2031         [_IOC_NR(_ioctl)] = {                                           \
2032                 .ioctl = _ioctl,                                        \
2033                 .flags = _flags | INFO_FL_FUNC,                         \
2034                 .name = #_ioctl,                                        \
2035                 .u.func = _func,                                        \
2036                 .debug = _debug,                                        \
2037         }
2038
2039 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2040         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2041         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2042         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2043         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2044         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2045         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2046         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2047         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2048         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2049         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2050         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2051         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2052         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2053         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2054         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2055         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2056         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
2057         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2058         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2059         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2060         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2061         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2062         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2063         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2064         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2065         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2066         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2067         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2068         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2069         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2070         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2071         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2072         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2073         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2074         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2075         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2076         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2077         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2078         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2079         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2080         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2081         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2082         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2083         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2084         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2085         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2086         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2087         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2088         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2089         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2090         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2091         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2092         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)),
2093         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2094         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2095         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2096         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2097         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2098         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2099         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2100         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2101         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2102         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2103         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2104         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2105         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2106         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2107         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2108         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2109         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2110         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2111         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2112         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2113         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2114         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2115         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2116         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2117         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2118         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2119         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)),
2120 };
2121 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2122
2123 bool v4l2_is_known_ioctl(unsigned int cmd)
2124 {
2125         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2126                 return false;
2127         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2128 }
2129
2130 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2131 {
2132         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2133                 return vdev->lock;
2134         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2135                 return NULL;
2136         if (vdev->queue && vdev->queue->lock &&
2137                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2138                 return vdev->queue->lock;
2139         return vdev->lock;
2140 }
2141
2142 /* Common ioctl debug function. This function can be used by
2143    external ioctl messages as well as internal V4L ioctl */
2144 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2145 {
2146         const char *dir, *type;
2147
2148         if (prefix)
2149                 printk(KERN_DEBUG "%s: ", prefix);
2150
2151         switch (_IOC_TYPE(cmd)) {
2152         case 'd':
2153                 type = "v4l2_int";
2154                 break;
2155         case 'V':
2156                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2157                         type = "v4l2";
2158                         break;
2159                 }
2160                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2161                 return;
2162         default:
2163                 type = "unknown";
2164                 break;
2165         }
2166
2167         switch (_IOC_DIR(cmd)) {
2168         case _IOC_NONE:              dir = "--"; break;
2169         case _IOC_READ:              dir = "r-"; break;
2170         case _IOC_WRITE:             dir = "-w"; break;
2171         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2172         default:                     dir = "*ERR*"; break;
2173         }
2174         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2175                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2176 }
2177 EXPORT_SYMBOL(v4l_printk_ioctl);
2178
2179 static long __video_do_ioctl(struct file *file,
2180                 unsigned int cmd, void *arg)
2181 {
2182         struct video_device *vfd = video_devdata(file);
2183         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2184         bool write_only = false;
2185         struct v4l2_ioctl_info default_info;
2186         const struct v4l2_ioctl_info *info;
2187         void *fh = file->private_data;
2188         struct v4l2_fh *vfh = NULL;
2189         int use_fh_prio = 0;
2190         int debug = vfd->debug;
2191         long ret = -ENOTTY;
2192
2193         if (ops == NULL) {
2194                 pr_warn("%s: has no ioctl_ops.\n",
2195                                 video_device_node_name(vfd));
2196                 return ret;
2197         }
2198
2199         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2200                 vfh = file->private_data;
2201                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2202         }
2203
2204         if (v4l2_is_known_ioctl(cmd)) {
2205                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2206
2207                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2208                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2209                         goto done;
2210
2211                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2212                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2213                         if (ret)
2214                                 goto done;
2215                 }
2216         } else {
2217                 default_info.ioctl = cmd;
2218                 default_info.flags = 0;
2219                 default_info.debug = v4l_print_default;
2220                 info = &default_info;
2221         }
2222
2223         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2224         if (info->flags & INFO_FL_STD) {
2225                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2226                 const void *p = vfd->ioctl_ops;
2227                 const vidioc_op *vidioc = p + info->u.offset;
2228
2229                 ret = (*vidioc)(file, fh, arg);
2230         } else if (info->flags & INFO_FL_FUNC) {
2231                 ret = info->u.func(ops, file, fh, arg);
2232         } else if (!ops->vidioc_default) {
2233                 ret = -ENOTTY;
2234         } else {
2235                 ret = ops->vidioc_default(file, fh,
2236                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2237                         cmd, arg);
2238         }
2239
2240 done:
2241         if (debug) {
2242                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2243                 if (ret < 0)
2244                         pr_cont(": error %ld", ret);
2245                 if (debug == V4L2_DEBUG_IOCTL)
2246                         pr_cont("\n");
2247                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2248                         info->debug(arg, write_only);
2249                 else {
2250                         pr_cont(": ");
2251                         info->debug(arg, write_only);
2252                 }
2253         }
2254
2255         return ret;
2256 }
2257
2258 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2259                             void * __user *user_ptr, void ***kernel_ptr)
2260 {
2261         int ret = 0;
2262
2263         switch (cmd) {
2264         case VIDIOC_PREPARE_BUF:
2265         case VIDIOC_QUERYBUF:
2266         case VIDIOC_QBUF:
2267         case VIDIOC_DQBUF: {
2268                 struct v4l2_buffer *buf = parg;
2269
2270                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2271                         if (buf->length > VIDEO_MAX_PLANES) {
2272                                 ret = -EINVAL;
2273                                 break;
2274                         }
2275                         *user_ptr = (void __user *)buf->m.planes;
2276                         *kernel_ptr = (void *)&buf->m.planes;
2277                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2278                         ret = 1;
2279                 }
2280                 break;
2281         }
2282
2283         case VIDIOC_SUBDEV_G_EDID:
2284         case VIDIOC_SUBDEV_S_EDID: {
2285                 struct v4l2_subdev_edid *edid = parg;
2286
2287                 if (edid->blocks) {
2288                         if (edid->blocks > 256) {
2289                                 ret = -EINVAL;
2290                                 break;
2291                         }
2292                         *user_ptr = (void __user *)edid->edid;
2293                         *kernel_ptr = (void *)&edid->edid;
2294                         *array_size = edid->blocks * 128;
2295                         ret = 1;
2296                 }
2297                 break;
2298         }
2299
2300         case VIDIOC_S_EXT_CTRLS:
2301         case VIDIOC_G_EXT_CTRLS:
2302         case VIDIOC_TRY_EXT_CTRLS: {
2303                 struct v4l2_ext_controls *ctrls = parg;
2304
2305                 if (ctrls->count != 0) {
2306                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2307                                 ret = -EINVAL;
2308                                 break;
2309                         }
2310                         *user_ptr = (void __user *)ctrls->controls;
2311                         *kernel_ptr = (void *)&ctrls->controls;
2312                         *array_size = sizeof(struct v4l2_ext_control)
2313                                     * ctrls->count;
2314                         ret = 1;
2315                 }
2316                 break;
2317         }
2318         }
2319
2320         return ret;
2321 }
2322
2323 long
2324 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2325                v4l2_kioctl func)
2326 {
2327         char    sbuf[128];
2328         void    *mbuf = NULL;
2329         void    *parg = (void *)arg;
2330         long    err  = -EINVAL;
2331         bool    has_array_args;
2332         size_t  array_size = 0;
2333         void __user *user_ptr = NULL;
2334         void    **kernel_ptr = NULL;
2335
2336         /*  Copy arguments into temp kernel buffer  */
2337         if (_IOC_DIR(cmd) != _IOC_NONE) {
2338                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2339                         parg = sbuf;
2340                 } else {
2341                         /* too big to allocate from stack */
2342                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2343                         if (NULL == mbuf)
2344                                 return -ENOMEM;
2345                         parg = mbuf;
2346                 }
2347
2348                 err = -EFAULT;
2349                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2350                         unsigned int n = _IOC_SIZE(cmd);
2351
2352                         /*
2353                          * In some cases, only a few fields are used as input,
2354                          * i.e. when the app sets "index" and then the driver
2355                          * fills in the rest of the structure for the thing
2356                          * with that index.  We only need to copy up the first
2357                          * non-input field.
2358                          */
2359                         if (v4l2_is_known_ioctl(cmd)) {
2360                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2361                                 if (flags & INFO_FL_CLEAR_MASK)
2362                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2363                         }
2364
2365                         if (copy_from_user(parg, (void __user *)arg, n))
2366                                 goto out;
2367
2368                         /* zero out anything we don't copy from userspace */
2369                         if (n < _IOC_SIZE(cmd))
2370                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2371                 } else {
2372                         /* read-only ioctl */
2373                         memset(parg, 0, _IOC_SIZE(cmd));
2374                 }
2375         }
2376
2377         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2378         if (err < 0)
2379                 goto out;
2380         has_array_args = err;
2381
2382         if (has_array_args) {
2383                 /*
2384                  * When adding new types of array args, make sure that the
2385                  * parent argument to ioctl (which contains the pointer to the
2386                  * array) fits into sbuf (so that mbuf will still remain
2387                  * unused up to here).
2388                  */
2389                 mbuf = kmalloc(array_size, GFP_KERNEL);
2390                 err = -ENOMEM;
2391                 if (NULL == mbuf)
2392                         goto out_array_args;
2393                 err = -EFAULT;
2394                 if (copy_from_user(mbuf, user_ptr, array_size))
2395                         goto out_array_args;
2396                 *kernel_ptr = mbuf;
2397         }
2398
2399         /* Handles IOCTL */
2400         err = func(file, cmd, parg);
2401         if (err == -ENOIOCTLCMD)
2402                 err = -ENOTTY;
2403
2404         if (has_array_args) {
2405                 *kernel_ptr = user_ptr;
2406                 if (copy_to_user(user_ptr, mbuf, array_size))
2407                         err = -EFAULT;
2408                 goto out_array_args;
2409         }
2410         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2411            results that must be returned. */
2412         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2413                 goto out;
2414
2415 out_array_args:
2416         /*  Copy results into user buffer  */
2417         switch (_IOC_DIR(cmd)) {
2418         case _IOC_READ:
2419         case (_IOC_WRITE | _IOC_READ):
2420                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2421                         err = -EFAULT;
2422                 break;
2423         }
2424
2425 out:
2426         kfree(mbuf);
2427         return err;
2428 }
2429 EXPORT_SYMBOL(video_usercopy);
2430
2431 long video_ioctl2(struct file *file,
2432                unsigned int cmd, unsigned long arg)
2433 {
2434         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2435 }
2436 EXPORT_SYMBOL(video_ioctl2);