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