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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-chip-ident.h>
  30 #include <media/videobuf2-core.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40 struct std_descr {
  41         v4l2_std_id std;
  42         const char *descr;
  43 };
  44
  45 static const struct std_descr standards[] = {
  46         { V4L2_STD_NTSC,        "NTSC"      },
  47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51         { V4L2_STD_PAL,         "PAL"       },
  52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53         { V4L2_STD_PAL_B,       "PAL-B"     },
  54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55         { V4L2_STD_PAL_G,       "PAL-G"     },
  56         { V4L2_STD_PAL_H,       "PAL-H"     },
  57         { V4L2_STD_PAL_I,       "PAL-I"     },
  58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59         { V4L2_STD_PAL_D,       "PAL-D"     },
  60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61         { V4L2_STD_PAL_K,       "PAL-K"     },
  62         { V4L2_STD_PAL_M,       "PAL-M"     },
  63         { V4L2_STD_PAL_N,       "PAL-N"     },
  64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65         { V4L2_STD_PAL_60,      "PAL-60"    },
  66         { V4L2_STD_SECAM,       "SECAM"     },
  67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76         { 0,                    "Unknown"   }
  77 };
  78
  79 /* video4linux standard ID conversion to standard name
  80  */
  81 const char *v4l2_norm_to_name(v4l2_std_id id)
  82 {
  83         u32 myid = id;
  84         int i;
  85
  86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87            64 bit comparations. So, on that architecture, with some gcc
  88            variants, compilation fails. Currently, the max value is 30bit wide.
  89          */
  90         BUG_ON(myid != id);
  91
  92         for (i = 0; standards[i].std; i++)
  93                 if (myid == standards[i].std)
  94                         break;
  95         return standards[i].descr;
  96 }
  97 EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99 /* Returns frame period for the given standard */
 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101 {
 102         if (id & V4L2_STD_525_60) {
 103                 frameperiod->numerator = 1001;
 104                 frameperiod->denominator = 30000;
 105         } else {
 106                 frameperiod->numerator = 1;
 107                 frameperiod->denominator = 25;
 108         }
 109 }
 110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112 /* Fill in the fields of a v4l2_standard structure according to the
 113    'id' and 'transmission' parameters.  Returns negative on error.  */
 114 int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                              int id, const char *name)
 116 {
 117         vs->id = id;
 118         v4l2_video_std_frame_period(id, &vs->frameperiod);
 119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120         strlcpy(vs->name, name, sizeof(vs->name));
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125 /* ----------------------------------------------------------------- */
 126 /* some arrays for pretty-printing debug messages of enum types      */
 127
 128 const char *v4l2_field_names[] = {
 129         [V4L2_FIELD_ANY]        = "any",
 130         [V4L2_FIELD_NONE]       = "none",
 131         [V4L2_FIELD_TOP]        = "top",
 132         [V4L2_FIELD_BOTTOM]     = "bottom",
 133         [V4L2_FIELD_INTERLACED] = "interlaced",
 134         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 135         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 136         [V4L2_FIELD_ALTERNATE]  = "alternate",
 137         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 138         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 139 };
 140 EXPORT_SYMBOL(v4l2_field_names);
 141
 142 const char *v4l2_type_names[] = {
 143         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 144         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 145         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 146         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 147         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 148         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 149         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 151         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 153 };
 154 EXPORT_SYMBOL(v4l2_type_names);
 155
 156 static const char *v4l2_memory_names[] = {
 157         [V4L2_MEMORY_MMAP]    = "mmap",
 158         [V4L2_MEMORY_USERPTR] = "userptr",
 159         [V4L2_MEMORY_OVERLAY] = "overlay",
 160         [V4L2_MEMORY_DMABUF] = "dmabuf",
 161 };
 162
 163 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 164
 165 /* ------------------------------------------------------------------ */
 166 /* debug help functions                                               */
 167
 168 static void v4l_print_querycap(const void *arg, bool write_only)
 169 {
 170         const struct v4l2_capability *p = arg;
 171
 172         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 173                 "capabilities=0x%08x, device_caps=0x%08x\n",
 174                 (int)sizeof(p->driver), p->driver,
 175                 (int)sizeof(p->card), p->card,
 176                 (int)sizeof(p->bus_info), p->bus_info,
 177                 p->version, p->capabilities, p->device_caps);
 178 }
 179
 180 static void v4l_print_enuminput(const void *arg, bool write_only)
 181 {
 182         const struct v4l2_input *p = arg;
 183
 184         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 185                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 186                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 187                 p->tuner, (unsigned long long)p->std, p->status,
 188                 p->capabilities);
 189 }
 190
 191 static void v4l_print_enumoutput(const void *arg, bool write_only)
 192 {
 193         const struct v4l2_output *p = arg;
 194
 195         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 196                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 197                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 198                 p->modulator, (unsigned long long)p->std, p->capabilities);
 199 }
 200
 201 static void v4l_print_audio(const void *arg, bool write_only)
 202 {
 203         const struct v4l2_audio *p = arg;
 204
 205         if (write_only)
 206                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 207         else
 208                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 209                         p->index, (int)sizeof(p->name), p->name,
 210                         p->capability, p->mode);
 211 }
 212
 213 static void v4l_print_audioout(const void *arg, bool write_only)
 214 {
 215         const struct v4l2_audioout *p = arg;
 216
 217         if (write_only)
 218                 pr_cont("index=%u\n", p->index);
 219         else
 220                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 221                         p->index, (int)sizeof(p->name), p->name,
 222                         p->capability, p->mode);
 223 }
 224
 225 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 226 {
 227         const struct v4l2_fmtdesc *p = arg;
 228
 229         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 230                 p->index, prt_names(p->type, v4l2_type_names),
 231                 p->flags, (p->pixelformat & 0xff),
 232                 (p->pixelformat >>  8) & 0xff,
 233                 (p->pixelformat >> 16) & 0xff,
 234                 (p->pixelformat >> 24) & 0xff,
 235                 (int)sizeof(p->description), p->description);
 236 }
 237
 238 static void v4l_print_format(const void *arg, bool write_only)
 239 {
 240         const struct v4l2_format *p = arg;
 241         const struct v4l2_pix_format *pix;
 242         const struct v4l2_pix_format_mplane *mp;
 243         const struct v4l2_vbi_format *vbi;
 244         const struct v4l2_sliced_vbi_format *sliced;
 245         const struct v4l2_window *win;
 246         const struct v4l2_clip *clip;
 247         unsigned i;
 248
 249         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 250         switch (p->type) {
 251         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 252         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 253                 pix = &p->fmt.pix;
 254                 pr_cont(", width=%u, height=%u, "
 255                         "pixelformat=%c%c%c%c, field=%s, "
 256                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 257                         pix->width, pix->height,
 258                         (pix->pixelformat & 0xff),
 259                         (pix->pixelformat >>  8) & 0xff,
 260                         (pix->pixelformat >> 16) & 0xff,
 261                         (pix->pixelformat >> 24) & 0xff,
 262                         prt_names(pix->field, v4l2_field_names),
 263                         pix->bytesperline, pix->sizeimage,
 264                         pix->colorspace);
 265                 break;
 266         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 267         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 268                 mp = &p->fmt.pix_mp;
 269                 pr_cont(", width=%u, height=%u, "
 270                         "format=%c%c%c%c, field=%s, "
 271                         "colorspace=%d, num_planes=%u\n",
 272                         mp->width, mp->height,
 273                         (mp->pixelformat & 0xff),
 274                         (mp->pixelformat >>  8) & 0xff,
 275                         (mp->pixelformat >> 16) & 0xff,
 276                         (mp->pixelformat >> 24) & 0xff,
 277                         prt_names(mp->field, v4l2_field_names),
 278                         mp->colorspace, mp->num_planes);
 279                 for (i = 0; i < mp->num_planes; i++)
 280                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 281                                         mp->plane_fmt[i].bytesperline,
 282                                         mp->plane_fmt[i].sizeimage);
 283                 break;
 284         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 285         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 286                 win = &p->fmt.win;
 287                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
 288                         "chromakey=0x%08x, bitmap=%p, "
 289                         "global_alpha=0x%02x\n",
 290                         win->w.width, win->w.height,
 291                         win->w.left, win->w.top,
 292                         prt_names(win->field, v4l2_field_names),
 293                         win->chromakey, win->bitmap, win->global_alpha);
 294                 clip = win->clips;
 295                 for (i = 0; i < win->clipcount; i++) {
 296                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
 297                                         i, clip->c.width, clip->c.height,
 298                                         clip->c.left, clip->c.top);
 299                         clip = clip->next;
 300                 }
 301                 break;
 302         case V4L2_BUF_TYPE_VBI_CAPTURE:
 303         case V4L2_BUF_TYPE_VBI_OUTPUT:
 304                 vbi = &p->fmt.vbi;
 305                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 306                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 307                         vbi->sampling_rate, vbi->offset,
 308                         vbi->samples_per_line,
 309                         (vbi->sample_format & 0xff),
 310                         (vbi->sample_format >>  8) & 0xff,
 311                         (vbi->sample_format >> 16) & 0xff,
 312                         (vbi->sample_format >> 24) & 0xff,
 313                         vbi->start[0], vbi->start[1],
 314                         vbi->count[0], vbi->count[1]);
 315                 break;
 316         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 317         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 318                 sliced = &p->fmt.sliced;
 319                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 320                                 sliced->service_set, sliced->io_size);
 321                 for (i = 0; i < 24; i++)
 322                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 323                                 sliced->service_lines[0][i],
 324                                 sliced->service_lines[1][i]);
 325                 break;
 326         }
 327 }
 328
 329 static void v4l_print_framebuffer(const void *arg, bool write_only)
 330 {
 331         const struct v4l2_framebuffer *p = arg;
 332
 333         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 334                 "height=%u, pixelformat=%c%c%c%c, "
 335                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
 336                         p->capability, p->flags, p->base,
 337                         p->fmt.width, p->fmt.height,
 338                         (p->fmt.pixelformat & 0xff),
 339                         (p->fmt.pixelformat >>  8) & 0xff,
 340                         (p->fmt.pixelformat >> 16) & 0xff,
 341                         (p->fmt.pixelformat >> 24) & 0xff,
 342                         p->fmt.bytesperline, p->fmt.sizeimage,
 343                         p->fmt.colorspace);
 344 }
 345
 346 static void v4l_print_buftype(const void *arg, bool write_only)
 347 {
 348         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 349 }
 350
 351 static void v4l_print_modulator(const void *arg, bool write_only)
 352 {
 353         const struct v4l2_modulator *p = arg;
 354
 355         if (write_only)
 356                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
 357         else
 358                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 359                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 360                         p->index, (int)sizeof(p->name), p->name, p->capability,
 361                         p->rangelow, p->rangehigh, p->txsubchans);
 362 }
 363
 364 static void v4l_print_tuner(const void *arg, bool write_only)
 365 {
 366         const struct v4l2_tuner *p = arg;
 367
 368         if (write_only)
 369                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 370         else
 371                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 372                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 373                         "rxsubchans=0x%x, audmode=%u\n",
 374                         p->index, (int)sizeof(p->name), p->name, p->type,
 375                         p->capability, p->rangelow,
 376                         p->rangehigh, p->signal, p->afc,
 377                         p->rxsubchans, p->audmode);
 378 }
 379
 380 static void v4l_print_frequency(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_frequency *p = arg;
 383
 384         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 385                                 p->tuner, p->type, p->frequency);
 386 }
 387
 388 static void v4l_print_standard(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_standard *p = arg;
 391
 392         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 393                 "framelines=%u\n", p->index,
 394                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 395                 p->frameperiod.numerator,
 396                 p->frameperiod.denominator,
 397                 p->framelines);
 398 }
 399
 400 static void v4l_print_std(const void *arg, bool write_only)
 401 {
 402         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 403 }
 404
 405 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 406 {
 407         const struct v4l2_hw_freq_seek *p = arg;
 408
 409         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 410                 "rangelow=%u, rangehigh=%u\n",
 411                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 412                 p->rangelow, p->rangehigh);
 413 }
 414
 415 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 416 {
 417         const struct v4l2_requestbuffers *p = arg;
 418
 419         pr_cont("count=%d, type=%s, memory=%s\n",
 420                 p->count,
 421                 prt_names(p->type, v4l2_type_names),
 422                 prt_names(p->memory, v4l2_memory_names));
 423 }
 424
 425 static void v4l_print_buffer(const void *arg, bool write_only)
 426 {
 427         const struct v4l2_buffer *p = arg;
 428         const struct v4l2_timecode *tc = &p->timecode;
 429         const struct v4l2_plane *plane;
 430         int i;
 431
 432         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 433                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 434                         p->timestamp.tv_sec / 3600,
 435                         (int)(p->timestamp.tv_sec / 60) % 60,
 436                         (int)(p->timestamp.tv_sec % 60),
 437                         (long)p->timestamp.tv_usec,
 438                         p->index,
 439                         prt_names(p->type, v4l2_type_names),
 440                         p->flags, prt_names(p->field, v4l2_field_names),
 441                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 442
 443         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 444                 pr_cont("\n");
 445                 for (i = 0; i < p->length; ++i) {
 446                         plane = &p->m.planes[i];
 447                         printk(KERN_DEBUG
 448                                 "plane %d: bytesused=%d, data_offset=0x%08x "
 449                                 "offset/userptr=0x%lx, length=%d\n",
 450                                 i, plane->bytesused, plane->data_offset,
 451                                 plane->m.userptr, plane->length);
 452                 }
 453         } else {
 454                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 455                         p->bytesused, p->m.userptr, p->length);
 456         }
 457
 458         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 459                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 460                         tc->hours, tc->minutes, tc->seconds,
 461                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 462 }
 463
 464 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 465 {
 466         const struct v4l2_exportbuffer *p = arg;
 467
 468         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 469                 p->fd, prt_names(p->type, v4l2_type_names),
 470                 p->index, p->plane, p->flags);
 471 }
 472
 473 static void v4l_print_create_buffers(const void *arg, bool write_only)
 474 {
 475         const struct v4l2_create_buffers *p = arg;
 476
 477         pr_cont("index=%d, count=%d, memory=%s, ",
 478                         p->index, p->count,
 479                         prt_names(p->memory, v4l2_memory_names));
 480         v4l_print_format(&p->format, write_only);
 481 }
 482
 483 static void v4l_print_streamparm(const void *arg, bool write_only)
 484 {
 485         const struct v4l2_streamparm *p = arg;
 486
 487         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 488
 489         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 490             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 491                 const struct v4l2_captureparm *c = &p->parm.capture;
 492
 493                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 494                         "extendedmode=%d, readbuffers=%d\n",
 495                         c->capability, c->capturemode,
 496                         c->timeperframe.numerator, c->timeperframe.denominator,
 497                         c->extendedmode, c->readbuffers);
 498         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 499                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 500                 const struct v4l2_outputparm *c = &p->parm.output;
 501
 502                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 503                         "extendedmode=%d, writebuffers=%d\n",
 504                         c->capability, c->outputmode,
 505                         c->timeperframe.numerator, c->timeperframe.denominator,
 506                         c->extendedmode, c->writebuffers);
 507         }
 508 }
 509
 510 static void v4l_print_queryctrl(const void *arg, bool write_only)
 511 {
 512         const struct v4l2_queryctrl *p = arg;
 513
 514         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 515                 "step=%d, default=%d, flags=0x%08x\n",
 516                         p->id, p->type, (int)sizeof(p->name), p->name,
 517                         p->minimum, p->maximum,
 518                         p->step, p->default_value, p->flags);
 519 }
 520
 521 static void v4l_print_querymenu(const void *arg, bool write_only)
 522 {
 523         const struct v4l2_querymenu *p = arg;
 524
 525         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 526 }
 527
 528 static void v4l_print_control(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_control *p = arg;
 531
 532         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 533 }
 534
 535 static void v4l_print_ext_controls(const void *arg, bool write_only)
 536 {
 537         const struct v4l2_ext_controls *p = arg;
 538         int i;
 539
 540         pr_cont("class=0x%x, count=%d, error_idx=%d",
 541                         p->ctrl_class, p->count, p->error_idx);
 542         for (i = 0; i < p->count; i++) {
 543                 if (p->controls[i].size)
 544                         pr_cont(", id/val=0x%x/0x%x",
 545                                 p->controls[i].id, p->controls[i].value);
 546                 else
 547                         pr_cont(", id/size=0x%x/%u",
 548                                 p->controls[i].id, p->controls[i].size);
 549         }
 550         pr_cont("\n");
 551 }
 552
 553 static void v4l_print_cropcap(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_cropcap *p = arg;
 556
 557         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 558                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
 559                 "pixelaspect %d/%d\n",
 560                 prt_names(p->type, v4l2_type_names),
 561                 p->bounds.width, p->bounds.height,
 562                 p->bounds.left, p->bounds.top,
 563                 p->defrect.width, p->defrect.height,
 564                 p->defrect.left, p->defrect.top,
 565                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 566 }
 567
 568 static void v4l_print_crop(const void *arg, bool write_only)
 569 {
 570         const struct v4l2_crop *p = arg;
 571
 572         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 573                 prt_names(p->type, v4l2_type_names),
 574                 p->c.width, p->c.height,
 575                 p->c.left, p->c.top);
 576 }
 577
 578 static void v4l_print_selection(const void *arg, bool write_only)
 579 {
 580         const struct v4l2_selection *p = arg;
 581
 582         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 583                 prt_names(p->type, v4l2_type_names),
 584                 p->target, p->flags,
 585                 p->r.width, p->r.height, p->r.left, p->r.top);
 586 }
 587
 588 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_jpegcompression *p = arg;
 591
 592         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 593                 "COM_len=%d, jpeg_markers=0x%x\n",
 594                 p->quality, p->APPn, p->APP_len,
 595                 p->COM_len, p->jpeg_markers);
 596 }
 597
 598 static void v4l_print_enc_idx(const void *arg, bool write_only)
 599 {
 600         const struct v4l2_enc_idx *p = arg;
 601
 602         pr_cont("entries=%d, entries_cap=%d\n",
 603                         p->entries, p->entries_cap);
 604 }
 605
 606 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 607 {
 608         const struct v4l2_encoder_cmd *p = arg;
 609
 610         pr_cont("cmd=%d, flags=0x%x\n",
 611                         p->cmd, p->flags);
 612 }
 613
 614 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 615 {
 616         const struct v4l2_decoder_cmd *p = arg;
 617
 618         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 619
 620         if (p->cmd == V4L2_DEC_CMD_START)
 621                 pr_info("speed=%d, format=%u\n",
 622                                 p->start.speed, p->start.format);
 623         else if (p->cmd == V4L2_DEC_CMD_STOP)
 624                 pr_info("pts=%llu\n", p->stop.pts);
 625 }
 626
 627 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_dbg_chip_ident *p = arg;
 630
 631         pr_cont("type=%u, ", p->match.type);
 632         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER ||
 633             p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME)
 634                 pr_cont("name=%.*s, ",
 635                                 (int)sizeof(p->match.name), p->match.name);
 636         else
 637                 pr_cont("addr=%u, ", p->match.addr);
 638         pr_cont("chip_ident=%u, revision=0x%x\n",
 639                         p->ident, p->revision);
 640 }
 641
 642 static void v4l_print_dbg_chip_name(const void *arg, bool write_only)
 643 {
 644         const struct v4l2_dbg_chip_name *p = arg;
 645
 646         pr_cont("type=%u, ", p->match.type);
 647         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER ||
 648             p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME)
 649                 pr_cont("name=%.*s, ",
 650                                 (int)sizeof(p->match.name), p->match.name);
 651         else
 652                 pr_cont("addr=%u, ", p->match.addr);
 653         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 654 }
 655
 656 static void v4l_print_dbg_register(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_dbg_register *p = arg;
 659
 660         pr_cont("type=%u, ", p->match.type);
 661         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER ||
 662             p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME)
 663                 pr_cont("name=%.*s, ",
 664                                 (int)sizeof(p->match.name), p->match.name);
 665         else
 666                 pr_cont("addr=%u, ", p->match.addr);
 667         pr_cont("reg=0x%llx, val=0x%llx\n",
 668                         p->reg, p->val);
 669 }
 670
 671 static void v4l_print_dv_timings(const void *arg, bool write_only)
 672 {
 673         const struct v4l2_dv_timings *p = arg;
 674
 675         switch (p->type) {
 676         case V4L2_DV_BT_656_1120:
 677                 pr_cont("type=bt-656/1120, interlaced=%u, "
 678                         "pixelclock=%llu, "
 679                         "width=%u, height=%u, polarities=0x%x, "
 680                         "hfrontporch=%u, hsync=%u, "
 681                         "hbackporch=%u, vfrontporch=%u, "
 682                         "vsync=%u, vbackporch=%u, "
 683                         "il_vfrontporch=%u, il_vsync=%u, "
 684                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 685                                 p->bt.interlaced, p->bt.pixelclock,
 686                                 p->bt.width, p->bt.height,
 687                                 p->bt.polarities, p->bt.hfrontporch,
 688                                 p->bt.hsync, p->bt.hbackporch,
 689                                 p->bt.vfrontporch, p->bt.vsync,
 690                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 691                                 p->bt.il_vsync, p->bt.il_vbackporch,
 692                                 p->bt.standards, p->bt.flags);
 693                 break;
 694         default:
 695                 pr_cont("type=%d\n", p->type);
 696                 break;
 697         }
 698 }
 699
 700 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 701 {
 702         const struct v4l2_enum_dv_timings *p = arg;
 703
 704         pr_cont("index=%u, ", p->index);
 705         v4l_print_dv_timings(&p->timings, write_only);
 706 }
 707
 708 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_dv_timings_cap *p = arg;
 711
 712         switch (p->type) {
 713         case V4L2_DV_BT_656_1120:
 714                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 715                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 716                         p->bt.min_width, p->bt.max_width,
 717                         p->bt.min_height, p->bt.max_height,
 718                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 719                         p->bt.standards, p->bt.capabilities);
 720                 break;
 721         default:
 722                 pr_cont("type=%u\n", p->type);
 723                 break;
 724         }
 725 }
 726
 727 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 728 {
 729         const struct v4l2_frmsizeenum *p = arg;
 730
 731         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 732                         p->index,
 733                         (p->pixel_format & 0xff),
 734                         (p->pixel_format >>  8) & 0xff,
 735                         (p->pixel_format >> 16) & 0xff,
 736                         (p->pixel_format >> 24) & 0xff,
 737                         p->type);
 738         switch (p->type) {
 739         case V4L2_FRMSIZE_TYPE_DISCRETE:
 740                 pr_cont(" wxh=%ux%u\n",
 741                         p->discrete.width, p->discrete.height);
 742                 break;
 743         case V4L2_FRMSIZE_TYPE_STEPWISE:
 744                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
 745                                 p->stepwise.min_width,  p->stepwise.min_height,
 746                                 p->stepwise.step_width, p->stepwise.step_height,
 747                                 p->stepwise.max_width,  p->stepwise.max_height);
 748                 break;
 749         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 750                 /* fall through */
 751         default:
 752                 pr_cont("\n");
 753                 break;
 754         }
 755 }
 756
 757 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 758 {
 759         const struct v4l2_frmivalenum *p = arg;
 760
 761         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 762                         p->index,
 763                         (p->pixel_format & 0xff),
 764                         (p->pixel_format >>  8) & 0xff,
 765                         (p->pixel_format >> 16) & 0xff,
 766                         (p->pixel_format >> 24) & 0xff,
 767                         p->width, p->height, p->type);
 768         switch (p->type) {
 769         case V4L2_FRMIVAL_TYPE_DISCRETE:
 770                 pr_cont(" fps=%d/%d\n",
 771                                 p->discrete.numerator,
 772                                 p->discrete.denominator);
 773                 break;
 774         case V4L2_FRMIVAL_TYPE_STEPWISE:
 775                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
 776                                 p->stepwise.min.numerator,
 777                                 p->stepwise.min.denominator,
 778                                 p->stepwise.max.numerator,
 779                                 p->stepwise.max.denominator,
 780                                 p->stepwise.step.numerator,
 781                                 p->stepwise.step.denominator);
 782                 break;
 783         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 784                 /* fall through */
 785         default:
 786                 pr_cont("\n");
 787                 break;
 788         }
 789 }
 790
 791 static void v4l_print_event(const void *arg, bool write_only)
 792 {
 793         const struct v4l2_event *p = arg;
 794         const struct v4l2_event_ctrl *c;
 795
 796         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 797                 "timestamp=%lu.%9.9lu\n",
 798                         p->type, p->pending, p->sequence, p->id,
 799                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 800         switch (p->type) {
 801         case V4L2_EVENT_VSYNC:
 802                 printk(KERN_DEBUG "field=%s\n",
 803                         prt_names(p->u.vsync.field, v4l2_field_names));
 804                 break;
 805         case V4L2_EVENT_CTRL:
 806                 c = &p->u.ctrl;
 807                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 808                         c->changes, c->type);
 809                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 810                         pr_cont("value64=%lld, ", c->value64);
 811                 else
 812                         pr_cont("value=%d, ", c->value);
 813                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
 814                                 " default_value=%d\n",
 815                         c->flags, c->minimum, c->maximum,
 816                         c->step, c->default_value);
 817                 break;
 818         case V4L2_EVENT_FRAME_SYNC:
 819                 pr_cont("frame_sequence=%u\n",
 820                         p->u.frame_sync.frame_sequence);
 821                 break;
 822         }
 823 }
 824
 825 static void v4l_print_event_subscription(const void *arg, bool write_only)
 826 {
 827         const struct v4l2_event_subscription *p = arg;
 828
 829         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 830                         p->type, p->id, p->flags);
 831 }
 832
 833 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 834 {
 835         const struct v4l2_sliced_vbi_cap *p = arg;
 836         int i;
 837
 838         pr_cont("type=%s, service_set=0x%08x\n",
 839                         prt_names(p->type, v4l2_type_names), p->service_set);
 840         for (i = 0; i < 24; i++)
 841                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 842                                 p->service_lines[0][i],
 843                                 p->service_lines[1][i]);
 844 }
 845
 846 static void v4l_print_freq_band(const void *arg, bool write_only)
 847 {
 848         const struct v4l2_frequency_band *p = arg;
 849
 850         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 851                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 852                         p->tuner, p->type, p->index,
 853                         p->capability, p->rangelow,
 854                         p->rangehigh, p->modulation);
 855 }
 856
 857 static void v4l_print_u32(const void *arg, bool write_only)
 858 {
 859         pr_cont("value=%u\n", *(const u32 *)arg);
 860 }
 861
 862 static void v4l_print_newline(const void *arg, bool write_only)
 863 {
 864         pr_cont("\n");
 865 }
 866
 867 static void v4l_print_default(const void *arg, bool write_only)
 868 {
 869         pr_cont("driver-specific ioctl\n");
 870 }
 871
 872 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 873 {
 874         __u32 i;
 875
 876         /* zero the reserved fields */
 877         c->reserved[0] = c->reserved[1] = 0;
 878         for (i = 0; i < c->count; i++)
 879                 c->controls[i].reserved2[0] = 0;
 880
 881         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 882            when using extended controls.
 883            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 884            is it allowed for backwards compatibility.
 885          */
 886         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 887                 return 0;
 888         /* Check that all controls are from the same control class. */
 889         for (i = 0; i < c->count; i++) {
 890                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 891                         c->error_idx = i;
 892                         return 0;
 893                 }
 894         }
 895         return 1;
 896 }
 897
 898 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 899 {
 900         struct video_device *vfd = video_devdata(file);
 901         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 902         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 903         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 904         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 905         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 906
 907         if (ops == NULL)
 908                 return -EINVAL;
 909
 910         switch (type) {
 911         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 912                 if (is_vid && is_rx &&
 913                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 914                         return 0;
 915                 break;
 916         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 917                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 918                         return 0;
 919                 break;
 920         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 921                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 922                         return 0;
 923                 break;
 924         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 925                 if (is_vid && is_tx &&
 926                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 930                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 931                         return 0;
 932                 break;
 933         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 934                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 935                         return 0;
 936                 break;
 937         case V4L2_BUF_TYPE_VBI_CAPTURE:
 938                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 939                         return 0;
 940                 break;
 941         case V4L2_BUF_TYPE_VBI_OUTPUT:
 942                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 943                         return 0;
 944                 break;
 945         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 946                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 950                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 951                         return 0;
 952                 break;
 953         default:
 954                 break;
 955         }
 956         return -EINVAL;
 957 }
 958
 959 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 960                                 struct file *file, void *fh, void *arg)
 961 {
 962         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 963
 964         cap->version = LINUX_VERSION_CODE;
 965         return ops->vidioc_querycap(file, fh, cap);
 966 }
 967
 968 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
 969                                 struct file *file, void *fh, void *arg)
 970 {
 971         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
 972 }
 973
 974 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
 975                                 struct file *file, void *fh, void *arg)
 976 {
 977         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
 978 }
 979
 980 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
 981                                 struct file *file, void *fh, void *arg)
 982 {
 983         struct video_device *vfd;
 984         u32 *p = arg;
 985
 986         if (ops->vidioc_g_priority)
 987                 return ops->vidioc_g_priority(file, fh, arg);
 988         vfd = video_devdata(file);
 989         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 990         return 0;
 991 }
 992
 993 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
 994                                 struct file *file, void *fh, void *arg)
 995 {
 996         struct video_device *vfd;
 997         struct v4l2_fh *vfh;
 998         u32 *p = arg;
 999
1000         if (ops->vidioc_s_priority)
1001                 return ops->vidioc_s_priority(file, fh, *p);
1002         vfd = video_devdata(file);
1003         vfh = file->private_data;
1004         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1005 }
1006
1007 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1008                                 struct file *file, void *fh, void *arg)
1009 {
1010         struct video_device *vfd = video_devdata(file);
1011         struct v4l2_input *p = arg;
1012
1013         /*
1014          * We set the flags for CAP_DV_TIMINGS &
1015          * CAP_STD here based on ioctl handler provided by the
1016          * driver. If the driver doesn't support these
1017          * for a specific input, it must override these flags.
1018          */
1019         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1020                 p->capabilities |= V4L2_IN_CAP_STD;
1021
1022         return ops->vidioc_enum_input(file, fh, p);
1023 }
1024
1025 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1026                                 struct file *file, void *fh, void *arg)
1027 {
1028         struct video_device *vfd = video_devdata(file);
1029         struct v4l2_output *p = arg;
1030
1031         /*
1032          * We set the flags for CAP_DV_TIMINGS &
1033          * CAP_STD here based on ioctl handler provided by the
1034          * driver. If the driver doesn't support these
1035          * for a specific output, it must override these flags.
1036          */
1037         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1038                 p->capabilities |= V4L2_OUT_CAP_STD;
1039
1040         return ops->vidioc_enum_output(file, fh, p);
1041 }
1042
1043 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1044                                 struct file *file, void *fh, void *arg)
1045 {
1046         struct v4l2_fmtdesc *p = arg;
1047         struct video_device *vfd = video_devdata(file);
1048         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1049         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1050
1051         switch (p->type) {
1052         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1053                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1054                         break;
1055                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1056         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1057                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1058                         break;
1059                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1060         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1061                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1062                         break;
1063                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1064         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1065                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1066                         break;
1067                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1068         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1069                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1070                         break;
1071                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1072         }
1073         return -EINVAL;
1074 }
1075
1076 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1077                                 struct file *file, void *fh, void *arg)
1078 {
1079         struct v4l2_format *p = arg;
1080         struct video_device *vfd = video_devdata(file);
1081         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1082         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1083         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1084
1085         switch (p->type) {
1086         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1087                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1088                         break;
1089                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1090         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1091                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1092                         break;
1093                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1094         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1095                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1096                         break;
1097                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1098         case V4L2_BUF_TYPE_VBI_CAPTURE:
1099                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1100                         break;
1101                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1102         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1103                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1104                         break;
1105                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1106         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1107                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1108                         break;
1109                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1110         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1111                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1112                         break;
1113                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1114         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1115                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1116                         break;
1117                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1118         case V4L2_BUF_TYPE_VBI_OUTPUT:
1119                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1120                         break;
1121                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1122         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1123                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1124                         break;
1125                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1126         }
1127         return -EINVAL;
1128 }
1129
1130 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1131                                 struct file *file, void *fh, void *arg)
1132 {
1133         struct v4l2_format *p = arg;
1134         struct video_device *vfd = video_devdata(file);
1135         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1136         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1137         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1138
1139         switch (p->type) {
1140         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1141                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1142                         break;
1143                 CLEAR_AFTER_FIELD(p, fmt.pix);
1144                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1145         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1146                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1147                         break;
1148                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1149                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1150         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1151                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1152                         break;
1153                 CLEAR_AFTER_FIELD(p, fmt.win);
1154                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1155         case V4L2_BUF_TYPE_VBI_CAPTURE:
1156                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1157                         break;
1158                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1159                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1160         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1161                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1162                         break;
1163                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1164                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1165         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1166                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1167                         break;
1168                 CLEAR_AFTER_FIELD(p, fmt.pix);
1169                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1170         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1171                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1172                         break;
1173                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1174                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1175         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1176                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1177                         break;
1178                 CLEAR_AFTER_FIELD(p, fmt.win);
1179                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1180         case V4L2_BUF_TYPE_VBI_OUTPUT:
1181                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1182                         break;
1183                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1184                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1185         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1186                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1187                         break;
1188                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1189                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1190         }
1191         return -EINVAL;
1192 }
1193
1194 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1195                                 struct file *file, void *fh, void *arg)
1196 {
1197         struct v4l2_format *p = arg;
1198         struct video_device *vfd = video_devdata(file);
1199         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1200         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1201         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1202
1203         switch (p->type) {
1204         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1205                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1206                         break;
1207                 CLEAR_AFTER_FIELD(p, fmt.pix);
1208                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1209         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1210                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1211                         break;
1212                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1213                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1214         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1215                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1216                         break;
1217                 CLEAR_AFTER_FIELD(p, fmt.win);
1218                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1219         case V4L2_BUF_TYPE_VBI_CAPTURE:
1220                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1221                         break;
1222                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1223                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1224         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1225                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1226                         break;
1227                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1228                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1229         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1230                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1231                         break;
1232                 CLEAR_AFTER_FIELD(p, fmt.pix);
1233                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1234         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1235                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1236                         break;
1237                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1238                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1239         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1240                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1241                         break;
1242                 CLEAR_AFTER_FIELD(p, fmt.win);
1243                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1244         case V4L2_BUF_TYPE_VBI_OUTPUT:
1245                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1246                         break;
1247                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1248                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1249         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1250                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1251                         break;
1252                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1253                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1254         }
1255         return -EINVAL;
1256 }
1257
1258 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1259                                 struct file *file, void *fh, void *arg)
1260 {
1261         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1262 }
1263
1264 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1265                                 struct file *file, void *fh, void *arg)
1266 {
1267         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1268 }
1269
1270 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1271                                 struct file *file, void *fh, void *arg)
1272 {
1273         struct video_device *vfd = video_devdata(file);
1274         struct v4l2_tuner *p = arg;
1275         int err;
1276
1277         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1278                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1279         err = ops->vidioc_g_tuner(file, fh, p);
1280         if (!err)
1281                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1282         return err;
1283 }
1284
1285 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1286                                 struct file *file, void *fh, void *arg)
1287 {
1288         struct video_device *vfd = video_devdata(file);
1289         struct v4l2_tuner *p = arg;
1290
1291         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1292                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1293         return ops->vidioc_s_tuner(file, fh, p);
1294 }
1295
1296 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1297                                 struct file *file, void *fh, void *arg)
1298 {
1299         struct v4l2_modulator *p = arg;
1300         int err;
1301
1302         err = ops->vidioc_g_modulator(file, fh, p);
1303         if (!err)
1304                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1305         return err;
1306 }
1307
1308 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1309                                 struct file *file, void *fh, void *arg)
1310 {
1311         struct video_device *vfd = video_devdata(file);
1312         struct v4l2_frequency *p = arg;
1313
1314         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1315                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1316         return ops->vidioc_g_frequency(file, fh, p);
1317 }
1318
1319 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1320                                 struct file *file, void *fh, void *arg)
1321 {
1322         struct video_device *vfd = video_devdata(file);
1323         const struct v4l2_frequency *p = arg;
1324         enum v4l2_tuner_type type;
1325
1326         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1327                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1328         if (p->type != type)
1329                 return -EINVAL;
1330         return ops->vidioc_s_frequency(file, fh, p);
1331 }
1332
1333 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1334                                 struct file *file, void *fh, void *arg)
1335 {
1336         struct video_device *vfd = video_devdata(file);
1337         struct v4l2_standard *p = arg;
1338         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1339         unsigned int index = p->index, i, j = 0;
1340         const char *descr = "";
1341
1342         /* Return -ENODATA if the tvnorms for the current input
1343            or output is 0, meaning that it doesn't support this API. */
1344         if (id == 0)
1345                 return -ENODATA;
1346
1347         /* Return norm array in a canonical way */
1348         for (i = 0; i <= index && id; i++) {
1349                 /* last std value in the standards array is 0, so this
1350                    while always ends there since (id & 0) == 0. */
1351                 while ((id & standards[j].std) != standards[j].std)
1352                         j++;
1353                 curr_id = standards[j].std;
1354                 descr = standards[j].descr;
1355                 j++;
1356                 if (curr_id == 0)
1357                         break;
1358                 if (curr_id != V4L2_STD_PAL &&
1359                                 curr_id != V4L2_STD_SECAM &&
1360                                 curr_id != V4L2_STD_NTSC)
1361                         id &= ~curr_id;
1362         }
1363         if (i <= index)
1364                 return -EINVAL;
1365
1366         v4l2_video_std_construct(p, curr_id, descr);
1367         return 0;
1368 }
1369
1370 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1371                                 struct file *file, void *fh, void *arg)
1372 {
1373         struct video_device *vfd = video_devdata(file);
1374         v4l2_std_id *id = arg;
1375
1376         /* Calls the specific handler */
1377         if (ops->vidioc_g_std)
1378                 return ops->vidioc_g_std(file, fh, arg);
1379         if (vfd->current_norm) {
1380                 *id = vfd->current_norm;
1381                 return 0;
1382         }
1383         return -ENOTTY;
1384 }
1385
1386 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1387                                 struct file *file, void *fh, void *arg)
1388 {
1389         struct video_device *vfd = video_devdata(file);
1390         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1391         int ret;
1392
1393         norm = id & vfd->tvnorms;
1394         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1395                 return -EINVAL;
1396
1397         /* Calls the specific handler */
1398         ret = ops->vidioc_s_std(file, fh, norm);
1399
1400         /* Updates standard information */
1401         if (ret >= 0)
1402                 vfd->current_norm = norm;
1403         return ret;
1404 }
1405
1406 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1407                                 struct file *file, void *fh, void *arg)
1408 {
1409         struct video_device *vfd = video_devdata(file);
1410         v4l2_std_id *p = arg;
1411
1412         /*
1413          * If nothing detected, it should return all supported
1414          * standard.
1415          * Drivers just need to mask the std argument, in order
1416          * to remove the standards that don't apply from the mask.
1417          * This means that tuners, audio and video decoders can join
1418          * their efforts to improve the standards detection.
1419          */
1420         *p = vfd->tvnorms;
1421         return ops->vidioc_querystd(file, fh, arg);
1422 }
1423
1424 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1425                                 struct file *file, void *fh, void *arg)
1426 {
1427         struct video_device *vfd = video_devdata(file);
1428         struct v4l2_hw_freq_seek *p = arg;
1429         enum v4l2_tuner_type type;
1430
1431         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1432                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1433         if (p->type != type)
1434                 return -EINVAL;
1435         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1436 }
1437
1438 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1439                                 struct file *file, void *fh, void *arg)
1440 {
1441         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1442 }
1443
1444 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1445                                 struct file *file, void *fh, void *arg)
1446 {
1447         struct v4l2_requestbuffers *p = arg;
1448         int ret = check_fmt(file, p->type);
1449
1450         if (ret)
1451                 return ret;
1452
1453         CLEAR_AFTER_FIELD(p, memory);
1454
1455         return ops->vidioc_reqbufs(file, fh, p);
1456 }
1457
1458 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1459                                 struct file *file, void *fh, void *arg)
1460 {
1461         struct v4l2_buffer *p = arg;
1462         int ret = check_fmt(file, p->type);
1463
1464         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1465 }
1466
1467 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1468                                 struct file *file, void *fh, void *arg)
1469 {
1470         struct v4l2_buffer *p = arg;
1471         int ret = check_fmt(file, p->type);
1472
1473         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1474 }
1475
1476 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1477                                 struct file *file, void *fh, void *arg)
1478 {
1479         struct v4l2_buffer *p = arg;
1480         int ret = check_fmt(file, p->type);
1481
1482         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1483 }
1484
1485 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1486                                 struct file *file, void *fh, void *arg)
1487 {
1488         struct v4l2_create_buffers *create = arg;
1489         int ret = check_fmt(file, create->format.type);
1490
1491         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1492 }
1493
1494 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1495                                 struct file *file, void *fh, void *arg)
1496 {
1497         struct v4l2_buffer *b = arg;
1498         int ret = check_fmt(file, b->type);
1499
1500         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1501 }
1502
1503 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1504                                 struct file *file, void *fh, void *arg)
1505 {
1506         struct video_device *vfd = video_devdata(file);
1507         struct v4l2_streamparm *p = arg;
1508         v4l2_std_id std;
1509         int ret = check_fmt(file, p->type);
1510
1511         if (ret)
1512                 return ret;
1513         if (ops->vidioc_g_parm)
1514                 return ops->vidioc_g_parm(file, fh, p);
1515         std = vfd->current_norm;
1516         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1517             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1518                 return -EINVAL;
1519         p->parm.capture.readbuffers = 2;
1520         if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std)
1521                 ret = ops->vidioc_g_std(file, fh, &std);
1522         if (ret == 0)
1523                 v4l2_video_std_frame_period(std,
1524                             &p->parm.capture.timeperframe);
1525         return ret;
1526 }
1527
1528 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1529                                 struct file *file, void *fh, void *arg)
1530 {
1531         struct v4l2_streamparm *p = arg;
1532         int ret = check_fmt(file, p->type);
1533
1534         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1535 }
1536
1537 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1538                                 struct file *file, void *fh, void *arg)
1539 {
1540         struct video_device *vfd = video_devdata(file);
1541         struct v4l2_queryctrl *p = arg;
1542         struct v4l2_fh *vfh =
1543                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1544
1545         if (vfh && vfh->ctrl_handler)
1546                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1547         if (vfd->ctrl_handler)
1548                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1549         if (ops->vidioc_queryctrl)
1550                 return ops->vidioc_queryctrl(file, fh, p);
1551         return -ENOTTY;
1552 }
1553
1554 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1555                                 struct file *file, void *fh, void *arg)
1556 {
1557         struct video_device *vfd = video_devdata(file);
1558         struct v4l2_querymenu *p = arg;
1559         struct v4l2_fh *vfh =
1560                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1561
1562         if (vfh && vfh->ctrl_handler)
1563                 return v4l2_querymenu(vfh->ctrl_handler, p);
1564         if (vfd->ctrl_handler)
1565                 return v4l2_querymenu(vfd->ctrl_handler, p);
1566         if (ops->vidioc_querymenu)
1567                 return ops->vidioc_querymenu(file, fh, p);
1568         return -ENOTTY;
1569 }
1570
1571 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1572                                 struct file *file, void *fh, void *arg)
1573 {
1574         struct video_device *vfd = video_devdata(file);
1575         struct v4l2_control *p = arg;
1576         struct v4l2_fh *vfh =
1577                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1578         struct v4l2_ext_controls ctrls;
1579         struct v4l2_ext_control ctrl;
1580
1581         if (vfh && vfh->ctrl_handler)
1582                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1583         if (vfd->ctrl_handler)
1584                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1585         if (ops->vidioc_g_ctrl)
1586                 return ops->vidioc_g_ctrl(file, fh, p);
1587         if (ops->vidioc_g_ext_ctrls == NULL)
1588                 return -ENOTTY;
1589
1590         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1591         ctrls.count = 1;
1592         ctrls.controls = &ctrl;
1593         ctrl.id = p->id;
1594         ctrl.value = p->value;
1595         if (check_ext_ctrls(&ctrls, 1)) {
1596                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1597
1598                 if (ret == 0)
1599                         p->value = ctrl.value;
1600                 return ret;
1601         }
1602         return -EINVAL;
1603 }
1604
1605 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1606                                 struct file *file, void *fh, void *arg)
1607 {
1608         struct video_device *vfd = video_devdata(file);
1609         struct v4l2_control *p = arg;
1610         struct v4l2_fh *vfh =
1611                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1612         struct v4l2_ext_controls ctrls;
1613         struct v4l2_ext_control ctrl;
1614
1615         if (vfh && vfh->ctrl_handler)
1616                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1617         if (vfd->ctrl_handler)
1618                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1619         if (ops->vidioc_s_ctrl)
1620                 return ops->vidioc_s_ctrl(file, fh, p);
1621         if (ops->vidioc_s_ext_ctrls == NULL)
1622                 return -ENOTTY;
1623
1624         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1625         ctrls.count = 1;
1626         ctrls.controls = &ctrl;
1627         ctrl.id = p->id;
1628         ctrl.value = p->value;
1629         if (check_ext_ctrls(&ctrls, 1))
1630                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1631         return -EINVAL;
1632 }
1633
1634 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1635                                 struct file *file, void *fh, void *arg)
1636 {
1637         struct video_device *vfd = video_devdata(file);
1638         struct v4l2_ext_controls *p = arg;
1639         struct v4l2_fh *vfh =
1640                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1641
1642         p->error_idx = p->count;
1643         if (vfh && vfh->ctrl_handler)
1644                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1645         if (vfd->ctrl_handler)
1646                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1647         if (ops->vidioc_g_ext_ctrls == NULL)
1648                 return -ENOTTY;
1649         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1650                                         -EINVAL;
1651 }
1652
1653 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1654                                 struct file *file, void *fh, void *arg)
1655 {
1656         struct video_device *vfd = video_devdata(file);
1657         struct v4l2_ext_controls *p = arg;
1658         struct v4l2_fh *vfh =
1659                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1660
1661         p->error_idx = p->count;
1662         if (vfh && vfh->ctrl_handler)
1663                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1664         if (vfd->ctrl_handler)
1665                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1666         if (ops->vidioc_s_ext_ctrls == NULL)
1667                 return -ENOTTY;
1668         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1669                                         -EINVAL;
1670 }
1671
1672 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1673                                 struct file *file, void *fh, void *arg)
1674 {
1675         struct video_device *vfd = video_devdata(file);
1676         struct v4l2_ext_controls *p = arg;
1677         struct v4l2_fh *vfh =
1678                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1679
1680         p->error_idx = p->count;
1681         if (vfh && vfh->ctrl_handler)
1682                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1683         if (vfd->ctrl_handler)
1684                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1685         if (ops->vidioc_try_ext_ctrls == NULL)
1686                 return -ENOTTY;
1687         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1688                                         -EINVAL;
1689 }
1690
1691 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1692                                 struct file *file, void *fh, void *arg)
1693 {
1694         struct v4l2_crop *p = arg;
1695         struct v4l2_selection s = {
1696                 .type = p->type,
1697         };
1698         int ret;
1699
1700         if (ops->vidioc_g_crop)
1701                 return ops->vidioc_g_crop(file, fh, p);
1702         /* simulate capture crop using selection api */
1703
1704         /* crop means compose for output devices */
1705         if (V4L2_TYPE_IS_OUTPUT(p->type))
1706                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1707         else
1708                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1709
1710         ret = ops->vidioc_g_selection(file, fh, &s);
1711
1712         /* copying results to old structure on success */
1713         if (!ret)
1714                 p->c = s.r;
1715         return ret;
1716 }
1717
1718 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1719                                 struct file *file, void *fh, void *arg)
1720 {
1721         struct v4l2_crop *p = arg;
1722         struct v4l2_selection s = {
1723                 .type = p->type,
1724                 .r = p->c,
1725         };
1726
1727         if (ops->vidioc_s_crop)
1728                 return ops->vidioc_s_crop(file, fh, p);
1729         /* simulate capture crop using selection api */
1730
1731         /* crop means compose for output devices */
1732         if (V4L2_TYPE_IS_OUTPUT(p->type))
1733                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1734         else
1735                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1736
1737         return ops->vidioc_s_selection(file, fh, &s);
1738 }
1739
1740 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1741                                 struct file *file, void *fh, void *arg)
1742 {
1743         struct v4l2_cropcap *p = arg;
1744         struct v4l2_selection s = { .type = p->type };
1745         int ret;
1746
1747         if (ops->vidioc_cropcap)
1748                 return ops->vidioc_cropcap(file, fh, p);
1749
1750         /* obtaining bounds */
1751         if (V4L2_TYPE_IS_OUTPUT(p->type))
1752                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1753         else
1754                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1755
1756         ret = ops->vidioc_g_selection(file, fh, &s);
1757         if (ret)
1758                 return ret;
1759         p->bounds = s.r;
1760
1761         /* obtaining defrect */
1762         if (V4L2_TYPE_IS_OUTPUT(p->type))
1763                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1764         else
1765                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1766
1767         ret = ops->vidioc_g_selection(file, fh, &s);
1768         if (ret)
1769                 return ret;
1770         p->defrect = s.r;
1771
1772         /* setting trivial pixelaspect */
1773         p->pixelaspect.numerator = 1;
1774         p->pixelaspect.denominator = 1;
1775         return 0;
1776 }
1777
1778 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1779                                 struct file *file, void *fh, void *arg)
1780 {
1781         struct video_device *vfd = video_devdata(file);
1782         int ret;
1783
1784         if (vfd->v4l2_dev)
1785                 pr_info("%s: =================  START STATUS  =================\n",
1786                         vfd->v4l2_dev->name);
1787         ret = ops->vidioc_log_status(file, fh);
1788         if (vfd->v4l2_dev)
1789                 pr_info("%s: ==================  END STATUS  ==================\n",
1790                         vfd->v4l2_dev->name);
1791         return ret;
1792 }
1793
1794 static bool v4l_dbg_found_match(const struct v4l2_dbg_match *match,
1795                 struct v4l2_subdev *sd, int idx)
1796 {
1797         if (match->type == V4L2_CHIP_MATCH_SUBDEV_IDX)
1798                 return match->addr == idx;
1799         return !strcmp(match->name, sd->name);
1800 }
1801
1802 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1803                                 struct file *file, void *fh, void *arg)
1804 {
1805 #ifdef CONFIG_VIDEO_ADV_DEBUG
1806         struct v4l2_dbg_register *p = arg;
1807         struct video_device *vfd = video_devdata(file);
1808         struct v4l2_subdev *sd;
1809         int idx = 0;
1810
1811         if (!capable(CAP_SYS_ADMIN))
1812                 return -EPERM;
1813         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV_IDX ||
1814             p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME) {
1815                 if (vfd->v4l2_dev == NULL)
1816                         return -EINVAL;
1817                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1818                         if (v4l_dbg_found_match(&p->match, sd, idx++))
1819                                 return v4l2_subdev_call(sd, core, g_register, p);
1820                 }
1821                 return -EINVAL;
1822         }
1823         if (ops->vidioc_g_register)
1824                 return ops->vidioc_g_register(file, fh, p);
1825         return -EINVAL;
1826 #else
1827         return -ENOTTY;
1828 #endif
1829 }
1830
1831 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1832                                 struct file *file, void *fh, void *arg)
1833 {
1834 #ifdef CONFIG_VIDEO_ADV_DEBUG
1835         const struct v4l2_dbg_register *p = arg;
1836         struct video_device *vfd = video_devdata(file);
1837         struct v4l2_subdev *sd;
1838         int idx = 0;
1839
1840         if (!capable(CAP_SYS_ADMIN))
1841                 return -EPERM;
1842         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV_IDX ||
1843             p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME) {
1844                 if (vfd->v4l2_dev == NULL)
1845                         return -EINVAL;
1846                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1847                         if (v4l_dbg_found_match(&p->match, sd, idx++))
1848                                 return v4l2_subdev_call(sd, core, s_register, p);
1849                 }
1850                 return -EINVAL;
1851         }
1852         if (ops->vidioc_s_register)
1853                 return ops->vidioc_s_register(file, fh, p);
1854         return -EINVAL;
1855 #else
1856         return -ENOTTY;
1857 #endif
1858 }
1859
1860 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1861                                 struct file *file, void *fh, void *arg)
1862 {
1863         struct v4l2_dbg_chip_ident *p = arg;
1864
1865         p->ident = V4L2_IDENT_NONE;
1866         p->revision = 0;
1867         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV_NAME ||
1868             p->match.type == V4L2_CHIP_MATCH_SUBDEV_IDX)
1869                 return -EINVAL;
1870         return ops->vidioc_g_chip_ident(file, fh, p);
1871 }
1872
1873 static int v4l_dbg_g_chip_name(const struct v4l2_ioctl_ops *ops,
1874                                 struct file *file, void *fh, void *arg)
1875 {
1876 #ifdef CONFIG_VIDEO_ADV_DEBUG
1877         struct video_device *vfd = video_devdata(file);
1878         struct v4l2_dbg_chip_name *p = arg;
1879         struct v4l2_subdev *sd;
1880         int idx = 0;
1881
1882         switch (p->match.type) {
1883         case V4L2_CHIP_MATCH_BRIDGE:
1884                 if (ops->vidioc_s_register)
1885                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1886                 if (ops->vidioc_g_register)
1887                         p->flags |= V4L2_CHIP_FL_READABLE;
1888                 if (ops->vidioc_g_chip_name)
1889                         return ops->vidioc_g_chip_name(file, fh, arg);
1890                 if (p->match.addr)
1891                         return -EINVAL;
1892                 if (vfd->v4l2_dev)
1893                         strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1894                 else if (vfd->parent)
1895                         strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name));
1896                 else
1897                         strlcpy(p->name, "bridge", sizeof(p->name));
1898                 return 0;
1899
1900         case V4L2_CHIP_MATCH_SUBDEV_IDX:
1901         case V4L2_CHIP_MATCH_SUBDEV_NAME:
1902                 if (vfd->v4l2_dev == NULL)
1903                         break;
1904                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1905                         if (v4l_dbg_found_match(&p->match, sd, idx++)) {
1906                                 if (sd->ops->core && sd->ops->core->s_register)
1907                                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1908                                 if (sd->ops->core && sd->ops->core->g_register)
1909                                         p->flags |= V4L2_CHIP_FL_READABLE;
1910                                 strlcpy(p->name, sd->name, sizeof(p->name));
1911                                 return 0;
1912                         }
1913                 }
1914                 break;
1915         }
1916         return -EINVAL;
1917 #else
1918         return -ENOTTY;
1919 #endif
1920 }
1921
1922 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1923                                 struct file *file, void *fh, void *arg)
1924 {
1925         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1926 }
1927
1928 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1929                                 struct file *file, void *fh, void *arg)
1930 {
1931         return ops->vidioc_subscribe_event(fh, arg);
1932 }
1933
1934 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1935                                 struct file *file, void *fh, void *arg)
1936 {
1937         return ops->vidioc_unsubscribe_event(fh, arg);
1938 }
1939
1940 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1941                                 struct file *file, void *fh, void *arg)
1942 {
1943         struct v4l2_sliced_vbi_cap *p = arg;
1944         int ret = check_fmt(file, p->type);
1945
1946         if (ret)
1947                 return ret;
1948
1949         /* Clear up to type, everything after type is zeroed already */
1950         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1951
1952         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1953 }
1954
1955 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1956                                 struct file *file, void *fh, void *arg)
1957 {
1958         struct video_device *vfd = video_devdata(file);
1959         struct v4l2_frequency_band *p = arg;
1960         enum v4l2_tuner_type type;
1961         int err;
1962
1963         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1964                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1965
1966         if (type != p->type)
1967                 return -EINVAL;
1968         if (ops->vidioc_enum_freq_bands)
1969                 return ops->vidioc_enum_freq_bands(file, fh, p);
1970         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1971                 struct v4l2_tuner t = {
1972                         .index = p->tuner,
1973                         .type = type,
1974                 };
1975
1976                 if (p->index)
1977                         return -EINVAL;
1978                 err = ops->vidioc_g_tuner(file, fh, &t);
1979                 if (err)
1980                         return err;
1981                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1982                 p->rangelow = t.rangelow;
1983                 p->rangehigh = t.rangehigh;
1984                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1985                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1986                 return 0;
1987         }
1988         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1989                 struct v4l2_modulator m = {
1990                         .index = p->tuner,
1991                 };
1992
1993                 if (type != V4L2_TUNER_RADIO)
1994                         return -EINVAL;
1995                 if (p->index)
1996                         return -EINVAL;
1997                 err = ops->vidioc_g_modulator(file, fh, &m);
1998                 if (err)
1999                         return err;
2000                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2001                 p->rangelow = m.rangelow;
2002                 p->rangehigh = m.rangehigh;
2003                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2004                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2005                 return 0;
2006         }
2007         return -ENOTTY;
2008 }
2009
2010 struct v4l2_ioctl_info {
2011         unsigned int ioctl;
2012         u32 flags;
2013         const char * const name;
2014         union {
2015                 u32 offset;
2016                 int (*func)(const struct v4l2_ioctl_ops *ops,
2017                                 struct file *file, void *fh, void *p);
2018         } u;
2019         void (*debug)(const void *arg, bool write_only);
2020 };
2021
2022 /* This control needs a priority check */
2023 #define INFO_FL_PRIO    (1 << 0)
2024 /* This control can be valid if the filehandle passes a control handler. */
2025 #define INFO_FL_CTRL    (1 << 1)
2026 /* This is a standard ioctl, no need for special code */
2027 #define INFO_FL_STD     (1 << 2)
2028 /* This is ioctl has its own function */
2029 #define INFO_FL_FUNC    (1 << 3)
2030 /* Queuing ioctl */
2031 #define INFO_FL_QUEUE   (1 << 4)
2032 /* Zero struct from after the field to the end */
2033 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2034         ((offsetof(struct v4l2_struct, field) +                 \
2035           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2036 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2037
2038 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2039         [_IOC_NR(_ioctl)] = {                                           \
2040                 .ioctl = _ioctl,                                        \
2041                 .flags = _flags | INFO_FL_STD,                          \
2042                 .name = #_ioctl,                                        \
2043                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2044                 .debug = _debug,                                        \
2045         }
2046
2047 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2048         [_IOC_NR(_ioctl)] = {                                           \
2049                 .ioctl = _ioctl,                                        \
2050                 .flags = _flags | INFO_FL_FUNC,                         \
2051                 .name = #_ioctl,                                        \
2052                 .u.func = _func,                                        \
2053                 .debug = _debug,                                        \
2054         }
2055
2056 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2057         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2058         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2059         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2060         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2061         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2062         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2063         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2064         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2065         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2066         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2067         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2068         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2069         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2070         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2071         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2072         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2073         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
2074         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2075         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2076         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2077         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2078         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2079         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2080         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2081         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2082         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2083         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2084         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2085         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2086         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2087         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2088         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2089         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2090         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2091         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2092         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2093         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2094         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2095         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2096         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2097         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2098         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2099         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2100         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2101         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2102         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2103         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2104         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2105         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2106         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2107         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2108         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2109         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)),
2110         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2111         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2112         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2113         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2114         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2115         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2116         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2117         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2118         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2119         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2120         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2121         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2122         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2123         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2124         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2125         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2126         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2127         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2128         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2129         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2130         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2131         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2132         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2133         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2134         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2135         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2136         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_NAME, v4l_dbg_g_chip_name, v4l_print_dbg_chip_name, INFO_FL_CLEAR(v4l2_dbg_chip_name, match)),
2137 };
2138 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2139
2140 bool v4l2_is_known_ioctl(unsigned int cmd)
2141 {
2142         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2143                 return false;
2144         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2145 }
2146
2147 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2148 {
2149         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2150                 return vdev->lock;
2151         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2152                 return NULL;
2153         if (vdev->queue && vdev->queue->lock &&
2154                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2155                 return vdev->queue->lock;
2156         return vdev->lock;
2157 }
2158
2159 /* Common ioctl debug function. This function can be used by
2160    external ioctl messages as well as internal V4L ioctl */
2161 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2162 {
2163         const char *dir, *type;
2164
2165         if (prefix)
2166                 printk(KERN_DEBUG "%s: ", prefix);
2167
2168         switch (_IOC_TYPE(cmd)) {
2169         case 'd':
2170                 type = "v4l2_int";
2171                 break;
2172         case 'V':
2173                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2174                         type = "v4l2";
2175                         break;
2176                 }
2177                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2178                 return;
2179         default:
2180                 type = "unknown";
2181                 break;
2182         }
2183
2184         switch (_IOC_DIR(cmd)) {
2185         case _IOC_NONE:              dir = "--"; break;
2186         case _IOC_READ:              dir = "r-"; break;
2187         case _IOC_WRITE:             dir = "-w"; break;
2188         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2189         default:                     dir = "*ERR*"; break;
2190         }
2191         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2192                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2193 }
2194 EXPORT_SYMBOL(v4l_printk_ioctl);
2195
2196 static long __video_do_ioctl(struct file *file,
2197                 unsigned int cmd, void *arg)
2198 {
2199         struct video_device *vfd = video_devdata(file);
2200         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2201         bool write_only = false;
2202         struct v4l2_ioctl_info default_info;
2203         const struct v4l2_ioctl_info *info;
2204         void *fh = file->private_data;
2205         struct v4l2_fh *vfh = NULL;
2206         int use_fh_prio = 0;
2207         int debug = vfd->debug;
2208         long ret = -ENOTTY;
2209
2210         if (ops == NULL) {
2211                 pr_warn("%s: has no ioctl_ops.\n",
2212                                 video_device_node_name(vfd));
2213                 return ret;
2214         }
2215
2216         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2217                 vfh = file->private_data;
2218                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2219         }
2220
2221         if (v4l2_is_known_ioctl(cmd)) {
2222                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2223
2224                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2225                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2226                         goto done;
2227
2228                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2229                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2230                         if (ret)
2231                                 goto done;
2232                 }
2233         } else {
2234                 default_info.ioctl = cmd;
2235                 default_info.flags = 0;
2236                 default_info.debug = v4l_print_default;
2237                 info = &default_info;
2238         }
2239
2240         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2241         if (info->flags & INFO_FL_STD) {
2242                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2243                 const void *p = vfd->ioctl_ops;
2244                 const vidioc_op *vidioc = p + info->u.offset;
2245
2246                 ret = (*vidioc)(file, fh, arg);
2247         } else if (info->flags & INFO_FL_FUNC) {
2248                 ret = info->u.func(ops, file, fh, arg);
2249         } else if (!ops->vidioc_default) {
2250                 ret = -ENOTTY;
2251         } else {
2252                 ret = ops->vidioc_default(file, fh,
2253                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2254                         cmd, arg);
2255         }
2256
2257 done:
2258         if (debug) {
2259                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2260                 if (ret < 0)
2261                         pr_cont(": error %ld", ret);
2262                 if (debug == V4L2_DEBUG_IOCTL)
2263                         pr_cont("\n");
2264                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2265                         info->debug(arg, write_only);
2266                 else {
2267                         pr_cont(": ");
2268                         info->debug(arg, write_only);
2269                 }
2270         }
2271
2272         return ret;
2273 }
2274
2275 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2276                             void * __user *user_ptr, void ***kernel_ptr)
2277 {
2278         int ret = 0;
2279
2280         switch (cmd) {
2281         case VIDIOC_PREPARE_BUF:
2282         case VIDIOC_QUERYBUF:
2283         case VIDIOC_QBUF:
2284         case VIDIOC_DQBUF: {
2285                 struct v4l2_buffer *buf = parg;
2286
2287                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2288                         if (buf->length > VIDEO_MAX_PLANES) {
2289                                 ret = -EINVAL;
2290                                 break;
2291                         }
2292                         *user_ptr = (void __user *)buf->m.planes;
2293                         *kernel_ptr = (void *)&buf->m.planes;
2294                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2295                         ret = 1;
2296                 }
2297                 break;
2298         }
2299
2300         case VIDIOC_SUBDEV_G_EDID:
2301         case VIDIOC_SUBDEV_S_EDID: {
2302                 struct v4l2_subdev_edid *edid = parg;
2303
2304                 if (edid->blocks) {
2305                         if (edid->blocks > 256) {
2306                                 ret = -EINVAL;
2307                                 break;
2308                         }
2309                         *user_ptr = (void __user *)edid->edid;
2310                         *kernel_ptr = (void *)&edid->edid;
2311                         *array_size = edid->blocks * 128;
2312                         ret = 1;
2313                 }
2314                 break;
2315         }
2316
2317         case VIDIOC_S_EXT_CTRLS:
2318         case VIDIOC_G_EXT_CTRLS:
2319         case VIDIOC_TRY_EXT_CTRLS: {
2320                 struct v4l2_ext_controls *ctrls = parg;
2321
2322                 if (ctrls->count != 0) {
2323                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2324                                 ret = -EINVAL;
2325                                 break;
2326                         }
2327                         *user_ptr = (void __user *)ctrls->controls;
2328                         *kernel_ptr = (void *)&ctrls->controls;
2329                         *array_size = sizeof(struct v4l2_ext_control)
2330                                     * ctrls->count;
2331                         ret = 1;
2332                 }
2333                 break;
2334         }
2335         }
2336
2337         return ret;
2338 }
2339
2340 long
2341 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2342                v4l2_kioctl func)
2343 {
2344         char    sbuf[128];
2345         void    *mbuf = NULL;
2346         void    *parg = (void *)arg;
2347         long    err  = -EINVAL;
2348         bool    has_array_args;
2349         size_t  array_size = 0;
2350         void __user *user_ptr = NULL;
2351         void    **kernel_ptr = NULL;
2352
2353         /*  Copy arguments into temp kernel buffer  */
2354         if (_IOC_DIR(cmd) != _IOC_NONE) {
2355                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2356                         parg = sbuf;
2357                 } else {
2358                         /* too big to allocate from stack */
2359                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2360                         if (NULL == mbuf)
2361                                 return -ENOMEM;
2362                         parg = mbuf;
2363                 }
2364
2365                 err = -EFAULT;
2366                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2367                         unsigned int n = _IOC_SIZE(cmd);
2368
2369                         /*
2370                          * In some cases, only a few fields are used as input,
2371                          * i.e. when the app sets "index" and then the driver
2372                          * fills in the rest of the structure for the thing
2373                          * with that index.  We only need to copy up the first
2374                          * non-input field.
2375                          */
2376                         if (v4l2_is_known_ioctl(cmd)) {
2377                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2378                                 if (flags & INFO_FL_CLEAR_MASK)
2379                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2380                         }
2381
2382                         if (copy_from_user(parg, (void __user *)arg, n))
2383                                 goto out;
2384
2385                         /* zero out anything we don't copy from userspace */
2386                         if (n < _IOC_SIZE(cmd))
2387                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2388                 } else {
2389                         /* read-only ioctl */
2390                         memset(parg, 0, _IOC_SIZE(cmd));
2391                 }
2392         }
2393
2394         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2395         if (err < 0)
2396                 goto out;
2397         has_array_args = err;
2398
2399         if (has_array_args) {
2400                 /*
2401                  * When adding new types of array args, make sure that the
2402                  * parent argument to ioctl (which contains the pointer to the
2403                  * array) fits into sbuf (so that mbuf will still remain
2404                  * unused up to here).
2405                  */
2406                 mbuf = kmalloc(array_size, GFP_KERNEL);
2407                 err = -ENOMEM;
2408                 if (NULL == mbuf)
2409                         goto out_array_args;
2410                 err = -EFAULT;
2411                 if (copy_from_user(mbuf, user_ptr, array_size))
2412                         goto out_array_args;
2413                 *kernel_ptr = mbuf;
2414         }
2415
2416         /* Handles IOCTL */
2417         err = func(file, cmd, parg);
2418         if (err == -ENOIOCTLCMD)
2419                 err = -ENOTTY;
2420
2421         if (has_array_args) {
2422                 *kernel_ptr = user_ptr;
2423                 if (copy_to_user(user_ptr, mbuf, array_size))
2424                         err = -EFAULT;
2425                 goto out_array_args;
2426         }
2427         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2428            results that must be returned. */
2429         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2430                 goto out;
2431
2432 out_array_args:
2433         /*  Copy results into user buffer  */
2434         switch (_IOC_DIR(cmd)) {
2435         case _IOC_READ:
2436         case (_IOC_WRITE | _IOC_READ):
2437                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2438                         err = -EFAULT;
2439                 break;
2440         }
2441
2442 out:
2443         kfree(mbuf);
2444         return err;
2445 }
2446 EXPORT_SYMBOL(video_usercopy);
2447
2448 long video_ioctl2(struct file *file,
2449                unsigned int cmd, unsigned long arg)
2450 {
2451         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2452 }
2453 EXPORT_SYMBOL(video_ioctl2);