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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-core.h>
  30
  31 #define CREATE_TRACE_POINTS
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparations. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 146         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 147         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 148         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 149         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 150         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 151         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 153         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 154         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 155         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 156 };
 157 EXPORT_SYMBOL(v4l2_type_names);
 158
 159 static const char *v4l2_memory_names[] = {
 160         [V4L2_MEMORY_MMAP]    = "mmap",
 161         [V4L2_MEMORY_USERPTR] = "userptr",
 162         [V4L2_MEMORY_OVERLAY] = "overlay",
 163         [V4L2_MEMORY_DMABUF] = "dmabuf",
 164 };
 165
 166 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 167
 168 /* ------------------------------------------------------------------ */
 169 /* debug help functions                                               */
 170
 171 static void v4l_print_querycap(const void *arg, bool write_only)
 172 {
 173         const struct v4l2_capability *p = arg;
 174
 175         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 176                 "capabilities=0x%08x, device_caps=0x%08x\n",
 177                 (int)sizeof(p->driver), p->driver,
 178                 (int)sizeof(p->card), p->card,
 179                 (int)sizeof(p->bus_info), p->bus_info,
 180                 p->version, p->capabilities, p->device_caps);
 181 }
 182
 183 static void v4l_print_enuminput(const void *arg, bool write_only)
 184 {
 185         const struct v4l2_input *p = arg;
 186
 187         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 188                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 189                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 190                 p->tuner, (unsigned long long)p->std, p->status,
 191                 p->capabilities);
 192 }
 193
 194 static void v4l_print_enumoutput(const void *arg, bool write_only)
 195 {
 196         const struct v4l2_output *p = arg;
 197
 198         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 199                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 200                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 201                 p->modulator, (unsigned long long)p->std, p->capabilities);
 202 }
 203
 204 static void v4l_print_audio(const void *arg, bool write_only)
 205 {
 206         const struct v4l2_audio *p = arg;
 207
 208         if (write_only)
 209                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 210         else
 211                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 212                         p->index, (int)sizeof(p->name), p->name,
 213                         p->capability, p->mode);
 214 }
 215
 216 static void v4l_print_audioout(const void *arg, bool write_only)
 217 {
 218         const struct v4l2_audioout *p = arg;
 219
 220         if (write_only)
 221                 pr_cont("index=%u\n", p->index);
 222         else
 223                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 224                         p->index, (int)sizeof(p->name), p->name,
 225                         p->capability, p->mode);
 226 }
 227
 228 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 229 {
 230         const struct v4l2_fmtdesc *p = arg;
 231
 232         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 233                 p->index, prt_names(p->type, v4l2_type_names),
 234                 p->flags, (p->pixelformat & 0xff),
 235                 (p->pixelformat >>  8) & 0xff,
 236                 (p->pixelformat >> 16) & 0xff,
 237                 (p->pixelformat >> 24) & 0xff,
 238                 (int)sizeof(p->description), p->description);
 239 }
 240
 241 static void v4l_print_format(const void *arg, bool write_only)
 242 {
 243         const struct v4l2_format *p = arg;
 244         const struct v4l2_pix_format *pix;
 245         const struct v4l2_pix_format_mplane *mp;
 246         const struct v4l2_vbi_format *vbi;
 247         const struct v4l2_sliced_vbi_format *sliced;
 248         const struct v4l2_window *win;
 249         const struct v4l2_sdr_format *sdr;
 250         unsigned i;
 251
 252         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 253         switch (p->type) {
 254         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 255         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 256                 pix = &p->fmt.pix;
 257                 pr_cont(", width=%u, height=%u, "
 258                         "pixelformat=%c%c%c%c, field=%s, "
 259                         "bytesperline=%u, sizeimage=%u, colorspace=%d, "
 260                         "flags %u\n",
 261                         pix->width, pix->height,
 262                         (pix->pixelformat & 0xff),
 263                         (pix->pixelformat >>  8) & 0xff,
 264                         (pix->pixelformat >> 16) & 0xff,
 265                         (pix->pixelformat >> 24) & 0xff,
 266                         prt_names(pix->field, v4l2_field_names),
 267                         pix->bytesperline, pix->sizeimage,
 268                         pix->colorspace, pix->flags);
 269                 break;
 270         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 271         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 272                 mp = &p->fmt.pix_mp;
 273                 pr_cont(", width=%u, height=%u, "
 274                         "format=%c%c%c%c, field=%s, "
 275                         "colorspace=%d, num_planes=%u\n",
 276                         mp->width, mp->height,
 277                         (mp->pixelformat & 0xff),
 278                         (mp->pixelformat >>  8) & 0xff,
 279                         (mp->pixelformat >> 16) & 0xff,
 280                         (mp->pixelformat >> 24) & 0xff,
 281                         prt_names(mp->field, v4l2_field_names),
 282                         mp->colorspace, mp->num_planes);
 283                 for (i = 0; i < mp->num_planes; i++)
 284                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 285                                         mp->plane_fmt[i].bytesperline,
 286                                         mp->plane_fmt[i].sizeimage);
 287                 break;
 288         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 289         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 290                 win = &p->fmt.win;
 291                 /* Note: we can't print the clip list here since the clips
 292                  * pointer is a userspace pointer, not a kernelspace
 293                  * pointer. */
 294                 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",
 295                         win->w.width, win->w.height, win->w.left, win->w.top,
 296                         prt_names(win->field, v4l2_field_names),
 297                         win->chromakey, win->clipcount, win->clips,
 298                         win->bitmap, win->global_alpha);
 299                 break;
 300         case V4L2_BUF_TYPE_VBI_CAPTURE:
 301         case V4L2_BUF_TYPE_VBI_OUTPUT:
 302                 vbi = &p->fmt.vbi;
 303                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 304                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 305                         vbi->sampling_rate, vbi->offset,
 306                         vbi->samples_per_line,
 307                         (vbi->sample_format & 0xff),
 308                         (vbi->sample_format >>  8) & 0xff,
 309                         (vbi->sample_format >> 16) & 0xff,
 310                         (vbi->sample_format >> 24) & 0xff,
 311                         vbi->start[0], vbi->start[1],
 312                         vbi->count[0], vbi->count[1]);
 313                 break;
 314         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 315         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 316                 sliced = &p->fmt.sliced;
 317                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 318                                 sliced->service_set, sliced->io_size);
 319                 for (i = 0; i < 24; i++)
 320                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 321                                 sliced->service_lines[0][i],
 322                                 sliced->service_lines[1][i]);
 323                 break;
 324         case V4L2_BUF_TYPE_SDR_CAPTURE:
 325                 sdr = &p->fmt.sdr;
 326                 pr_cont(", pixelformat=%c%c%c%c\n",
 327                         (sdr->pixelformat >>  0) & 0xff,
 328                         (sdr->pixelformat >>  8) & 0xff,
 329                         (sdr->pixelformat >> 16) & 0xff,
 330                         (sdr->pixelformat >> 24) & 0xff);
 331                 break;
 332         }
 333 }
 334
 335 static void v4l_print_framebuffer(const void *arg, bool write_only)
 336 {
 337         const struct v4l2_framebuffer *p = arg;
 338
 339         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 340                 "height=%u, pixelformat=%c%c%c%c, "
 341                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 342                         p->capability, p->flags, p->base,
 343                         p->fmt.width, p->fmt.height,
 344                         (p->fmt.pixelformat & 0xff),
 345                         (p->fmt.pixelformat >>  8) & 0xff,
 346                         (p->fmt.pixelformat >> 16) & 0xff,
 347                         (p->fmt.pixelformat >> 24) & 0xff,
 348                         p->fmt.bytesperline, p->fmt.sizeimage,
 349                         p->fmt.colorspace);
 350 }
 351
 352 static void v4l_print_buftype(const void *arg, bool write_only)
 353 {
 354         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 355 }
 356
 357 static void v4l_print_modulator(const void *arg, bool write_only)
 358 {
 359         const struct v4l2_modulator *p = arg;
 360
 361         if (write_only)
 362                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 363         else
 364                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 365                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 366                         p->index, (int)sizeof(p->name), p->name, p->capability,
 367                         p->rangelow, p->rangehigh, p->txsubchans);
 368 }
 369
 370 static void v4l_print_tuner(const void *arg, bool write_only)
 371 {
 372         const struct v4l2_tuner *p = arg;
 373
 374         if (write_only)
 375                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 376         else
 377                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 378                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 379                         "rxsubchans=0x%x, audmode=%u\n",
 380                         p->index, (int)sizeof(p->name), p->name, p->type,
 381                         p->capability, p->rangelow,
 382                         p->rangehigh, p->signal, p->afc,
 383                         p->rxsubchans, p->audmode);
 384 }
 385
 386 static void v4l_print_frequency(const void *arg, bool write_only)
 387 {
 388         const struct v4l2_frequency *p = arg;
 389
 390         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 391                                 p->tuner, p->type, p->frequency);
 392 }
 393
 394 static void v4l_print_standard(const void *arg, bool write_only)
 395 {
 396         const struct v4l2_standard *p = arg;
 397
 398         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 399                 "framelines=%u\n", p->index,
 400                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 401                 p->frameperiod.numerator,
 402                 p->frameperiod.denominator,
 403                 p->framelines);
 404 }
 405
 406 static void v4l_print_std(const void *arg, bool write_only)
 407 {
 408         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 409 }
 410
 411 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 412 {
 413         const struct v4l2_hw_freq_seek *p = arg;
 414
 415         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 416                 "rangelow=%u, rangehigh=%u\n",
 417                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 418                 p->rangelow, p->rangehigh);
 419 }
 420
 421 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 422 {
 423         const struct v4l2_requestbuffers *p = arg;
 424
 425         pr_cont("count=%d, type=%s, memory=%s\n",
 426                 p->count,
 427                 prt_names(p->type, v4l2_type_names),
 428                 prt_names(p->memory, v4l2_memory_names));
 429 }
 430
 431 static void v4l_print_buffer(const void *arg, bool write_only)
 432 {
 433         const struct v4l2_buffer *p = arg;
 434         const struct v4l2_timecode *tc = &p->timecode;
 435         const struct v4l2_plane *plane;
 436         int i;
 437
 438         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 439                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 440                         p->timestamp.tv_sec / 3600,
 441                         (int)(p->timestamp.tv_sec / 60) % 60,
 442                         (int)(p->timestamp.tv_sec % 60),
 443                         (long)p->timestamp.tv_usec,
 444                         p->index,
 445                         prt_names(p->type, v4l2_type_names),
 446                         p->flags, prt_names(p->field, v4l2_field_names),
 447                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 448
 449         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 450                 pr_cont("\n");
 451                 for (i = 0; i < p->length; ++i) {
 452                         plane = &p->m.planes[i];
 453                         printk(KERN_DEBUG
 454                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 455                                 "offset/userptr=0x%lx, length=%d\n",
 456                                 i, plane->bytesused, plane->data_offset,
 457                                 plane->m.userptr, plane->length);
 458                 }
 459         } else {
 460                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 461                         p->bytesused, p->m.userptr, p->length);
 462         }
 463
 464         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 465                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 466                         tc->hours, tc->minutes, tc->seconds,
 467                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 468 }
 469
 470 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 471 {
 472         const struct v4l2_exportbuffer *p = arg;
 473
 474         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 475                 p->fd, prt_names(p->type, v4l2_type_names),
 476                 p->index, p->plane, p->flags);
 477 }
 478
 479 static void v4l_print_create_buffers(const void *arg, bool write_only)
 480 {
 481         const struct v4l2_create_buffers *p = arg;
 482
 483         pr_cont("index=%d, count=%d, memory=%s, ",
 484                         p->index, p->count,
 485                         prt_names(p->memory, v4l2_memory_names));
 486         v4l_print_format(&p->format, write_only);
 487 }
 488
 489 static void v4l_print_streamparm(const void *arg, bool write_only)
 490 {
 491         const struct v4l2_streamparm *p = arg;
 492
 493         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 494
 495         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 496             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 497                 const struct v4l2_captureparm *c = &p->parm.capture;
 498
 499                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 500                         "extendedmode=%d, readbuffers=%d\n",
 501                         c->capability, c->capturemode,
 502                         c->timeperframe.numerator, c->timeperframe.denominator,
 503                         c->extendedmode, c->readbuffers);
 504         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 505                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 506                 const struct v4l2_outputparm *c = &p->parm.output;
 507
 508                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 509                         "extendedmode=%d, writebuffers=%d\n",
 510                         c->capability, c->outputmode,
 511                         c->timeperframe.numerator, c->timeperframe.denominator,
 512                         c->extendedmode, c->writebuffers);
 513         } else {
 514                 pr_cont("\n");
 515         }
 516 }
 517
 518 static void v4l_print_queryctrl(const void *arg, bool write_only)
 519 {
 520         const struct v4l2_queryctrl *p = arg;
 521
 522         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 523                 "step=%d, default=%d, flags=0x%08x\n",
 524                         p->id, p->type, (int)sizeof(p->name), p->name,
 525                         p->minimum, p->maximum,
 526                         p->step, p->default_value, p->flags);
 527 }
 528
 529 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 530 {
 531         const struct v4l2_query_ext_ctrl *p = arg;
 532
 533         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
 534                 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
 535                 "nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 536                         p->id, p->type, (int)sizeof(p->name), p->name,
 537                         p->minimum, p->maximum,
 538                         p->step, p->default_value, p->flags,
 539                         p->elem_size, p->elems, p->nr_of_dims,
 540                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 541 }
 542
 543 static void v4l_print_querymenu(const void *arg, bool write_only)
 544 {
 545         const struct v4l2_querymenu *p = arg;
 546
 547         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 548 }
 549
 550 static void v4l_print_control(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_control *p = arg;
 553
 554         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 555 }
 556
 557 static void v4l_print_ext_controls(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_ext_controls *p = arg;
 560         int i;
 561
 562         pr_cont("class=0x%x, count=%d, error_idx=%d",
 563                         p->ctrl_class, p->count, p->error_idx);
 564         for (i = 0; i < p->count; i++) {
 565                 if (p->controls[i].size)
 566                         pr_cont(", id/val=0x%x/0x%x",
 567                                 p->controls[i].id, p->controls[i].value);
 568                 else
 569                         pr_cont(", id/size=0x%x/%u",
 570                                 p->controls[i].id, p->controls[i].size);
 571         }
 572         pr_cont("\n");
 573 }
 574
 575 static void v4l_print_cropcap(const void *arg, bool write_only)
 576 {
 577         const struct v4l2_cropcap *p = arg;
 578
 579         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 580                 "defrect wxh=%dx%d, x,y=%d,%d, "
 581                 "pixelaspect %d/%d\n",
 582                 prt_names(p->type, v4l2_type_names),
 583                 p->bounds.width, p->bounds.height,
 584                 p->bounds.left, p->bounds.top,
 585                 p->defrect.width, p->defrect.height,
 586                 p->defrect.left, p->defrect.top,
 587                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 588 }
 589
 590 static void v4l_print_crop(const void *arg, bool write_only)
 591 {
 592         const struct v4l2_crop *p = arg;
 593
 594         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 595                 prt_names(p->type, v4l2_type_names),
 596                 p->c.width, p->c.height,
 597                 p->c.left, p->c.top);
 598 }
 599
 600 static void v4l_print_selection(const void *arg, bool write_only)
 601 {
 602         const struct v4l2_selection *p = arg;
 603
 604         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 605                 prt_names(p->type, v4l2_type_names),
 606                 p->target, p->flags,
 607                 p->r.width, p->r.height, p->r.left, p->r.top);
 608 }
 609
 610 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 611 {
 612         const struct v4l2_jpegcompression *p = arg;
 613
 614         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 615                 "COM_len=%d, jpeg_markers=0x%x\n",
 616                 p->quality, p->APPn, p->APP_len,
 617                 p->COM_len, p->jpeg_markers);
 618 }
 619
 620 static void v4l_print_enc_idx(const void *arg, bool write_only)
 621 {
 622         const struct v4l2_enc_idx *p = arg;
 623
 624         pr_cont("entries=%d, entries_cap=%d\n",
 625                         p->entries, p->entries_cap);
 626 }
 627
 628 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 629 {
 630         const struct v4l2_encoder_cmd *p = arg;
 631
 632         pr_cont("cmd=%d, flags=0x%x\n",
 633                         p->cmd, p->flags);
 634 }
 635
 636 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 637 {
 638         const struct v4l2_decoder_cmd *p = arg;
 639
 640         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 641
 642         if (p->cmd == V4L2_DEC_CMD_START)
 643                 pr_info("speed=%d, format=%u\n",
 644                                 p->start.speed, p->start.format);
 645         else if (p->cmd == V4L2_DEC_CMD_STOP)
 646                 pr_info("pts=%llu\n", p->stop.pts);
 647 }
 648
 649 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 650 {
 651         const struct v4l2_dbg_chip_info *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("name=%.*s\n", (int)sizeof(p->name), p->name);
 660 }
 661
 662 static void v4l_print_dbg_register(const void *arg, bool write_only)
 663 {
 664         const struct v4l2_dbg_register *p = arg;
 665
 666         pr_cont("type=%u, ", p->match.type);
 667         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 668                 pr_cont("name=%.*s, ",
 669                                 (int)sizeof(p->match.name), p->match.name);
 670         else
 671                 pr_cont("addr=%u, ", p->match.addr);
 672         pr_cont("reg=0x%llx, val=0x%llx\n",
 673                         p->reg, p->val);
 674 }
 675
 676 static void v4l_print_dv_timings(const void *arg, bool write_only)
 677 {
 678         const struct v4l2_dv_timings *p = arg;
 679
 680         switch (p->type) {
 681         case V4L2_DV_BT_656_1120:
 682                 pr_cont("type=bt-656/1120, interlaced=%u, "
 683                         "pixelclock=%llu, "
 684                         "width=%u, height=%u, polarities=0x%x, "
 685                         "hfrontporch=%u, hsync=%u, "
 686                         "hbackporch=%u, vfrontporch=%u, "
 687                         "vsync=%u, vbackporch=%u, "
 688                         "il_vfrontporch=%u, il_vsync=%u, "
 689                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 690                                 p->bt.interlaced, p->bt.pixelclock,
 691                                 p->bt.width, p->bt.height,
 692                                 p->bt.polarities, p->bt.hfrontporch,
 693                                 p->bt.hsync, p->bt.hbackporch,
 694                                 p->bt.vfrontporch, p->bt.vsync,
 695                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 696                                 p->bt.il_vsync, p->bt.il_vbackporch,
 697                                 p->bt.standards, p->bt.flags);
 698                 break;
 699         default:
 700                 pr_cont("type=%d\n", p->type);
 701                 break;
 702         }
 703 }
 704
 705 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 706 {
 707         const struct v4l2_enum_dv_timings *p = arg;
 708
 709         pr_cont("index=%u, ", p->index);
 710         v4l_print_dv_timings(&p->timings, write_only);
 711 }
 712
 713 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 714 {
 715         const struct v4l2_dv_timings_cap *p = arg;
 716
 717         switch (p->type) {
 718         case V4L2_DV_BT_656_1120:
 719                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 720                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 721                         p->bt.min_width, p->bt.max_width,
 722                         p->bt.min_height, p->bt.max_height,
 723                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 724                         p->bt.standards, p->bt.capabilities);
 725                 break;
 726         default:
 727                 pr_cont("type=%u\n", p->type);
 728                 break;
 729         }
 730 }
 731
 732 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 733 {
 734         const struct v4l2_frmsizeenum *p = arg;
 735
 736         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 737                         p->index,
 738                         (p->pixel_format & 0xff),
 739                         (p->pixel_format >>  8) & 0xff,
 740                         (p->pixel_format >> 16) & 0xff,
 741                         (p->pixel_format >> 24) & 0xff,
 742                         p->type);
 743         switch (p->type) {
 744         case V4L2_FRMSIZE_TYPE_DISCRETE:
 745                 pr_cont(", wxh=%ux%u\n",
 746                         p->discrete.width, p->discrete.height);
 747                 break;
 748         case V4L2_FRMSIZE_TYPE_STEPWISE:
 749                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 750                                 p->stepwise.min_width,  p->stepwise.min_height,
 751                                 p->stepwise.step_width, p->stepwise.step_height,
 752                                 p->stepwise.max_width,  p->stepwise.max_height);
 753                 break;
 754         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 755                 /* fall through */
 756         default:
 757                 pr_cont("\n");
 758                 break;
 759         }
 760 }
 761
 762 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 763 {
 764         const struct v4l2_frmivalenum *p = arg;
 765
 766         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 767                         p->index,
 768                         (p->pixel_format & 0xff),
 769                         (p->pixel_format >>  8) & 0xff,
 770                         (p->pixel_format >> 16) & 0xff,
 771                         (p->pixel_format >> 24) & 0xff,
 772                         p->width, p->height, p->type);
 773         switch (p->type) {
 774         case V4L2_FRMIVAL_TYPE_DISCRETE:
 775                 pr_cont(", fps=%d/%d\n",
 776                                 p->discrete.numerator,
 777                                 p->discrete.denominator);
 778                 break;
 779         case V4L2_FRMIVAL_TYPE_STEPWISE:
 780                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 781                                 p->stepwise.min.numerator,
 782                                 p->stepwise.min.denominator,
 783                                 p->stepwise.max.numerator,
 784                                 p->stepwise.max.denominator,
 785                                 p->stepwise.step.numerator,
 786                                 p->stepwise.step.denominator);
 787                 break;
 788         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 789                 /* fall through */
 790         default:
 791                 pr_cont("\n");
 792                 break;
 793         }
 794 }
 795
 796 static void v4l_print_event(const void *arg, bool write_only)
 797 {
 798         const struct v4l2_event *p = arg;
 799         const struct v4l2_event_ctrl *c;
 800
 801         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 802                 "timestamp=%lu.%9.9lu\n",
 803                         p->type, p->pending, p->sequence, p->id,
 804                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 805         switch (p->type) {
 806         case V4L2_EVENT_VSYNC:
 807                 printk(KERN_DEBUG "field=%s\n",
 808                         prt_names(p->u.vsync.field, v4l2_field_names));
 809                 break;
 810         case V4L2_EVENT_CTRL:
 811                 c = &p->u.ctrl;
 812                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 813                         c->changes, c->type);
 814                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 815                         pr_cont("value64=%lld, ", c->value64);
 816                 else
 817                         pr_cont("value=%d, ", c->value);
 818                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 819                         "default_value=%d\n",
 820                         c->flags, c->minimum, c->maximum,
 821                         c->step, c->default_value);
 822                 break;
 823         case V4L2_EVENT_FRAME_SYNC:
 824                 pr_cont("frame_sequence=%u\n",
 825                         p->u.frame_sync.frame_sequence);
 826                 break;
 827         }
 828 }
 829
 830 static void v4l_print_event_subscription(const void *arg, bool write_only)
 831 {
 832         const struct v4l2_event_subscription *p = arg;
 833
 834         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 835                         p->type, p->id, p->flags);
 836 }
 837
 838 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 839 {
 840         const struct v4l2_sliced_vbi_cap *p = arg;
 841         int i;
 842
 843         pr_cont("type=%s, service_set=0x%08x\n",
 844                         prt_names(p->type, v4l2_type_names), p->service_set);
 845         for (i = 0; i < 24; i++)
 846                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 847                                 p->service_lines[0][i],
 848                                 p->service_lines[1][i]);
 849 }
 850
 851 static void v4l_print_freq_band(const void *arg, bool write_only)
 852 {
 853         const struct v4l2_frequency_band *p = arg;
 854
 855         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 856                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 857                         p->tuner, p->type, p->index,
 858                         p->capability, p->rangelow,
 859                         p->rangehigh, p->modulation);
 860 }
 861
 862 static void v4l_print_edid(const void *arg, bool write_only)
 863 {
 864         const struct v4l2_edid *p = arg;
 865
 866         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 867                 p->pad, p->start_block, p->blocks);
 868 }
 869
 870 static void v4l_print_u32(const void *arg, bool write_only)
 871 {
 872         pr_cont("value=%u\n", *(const u32 *)arg);
 873 }
 874
 875 static void v4l_print_newline(const void *arg, bool write_only)
 876 {
 877         pr_cont("\n");
 878 }
 879
 880 static void v4l_print_default(const void *arg, bool write_only)
 881 {
 882         pr_cont("driver-specific ioctl\n");
 883 }
 884
 885 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 886 {
 887         __u32 i;
 888
 889         /* zero the reserved fields */
 890         c->reserved[0] = c->reserved[1] = 0;
 891         for (i = 0; i < c->count; i++)
 892                 c->controls[i].reserved2[0] = 0;
 893
 894         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 895            when using extended controls.
 896            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 897            is it allowed for backwards compatibility.
 898          */
 899         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 900                 return 0;
 901         /* Check that all controls are from the same control class. */
 902         for (i = 0; i < c->count; i++) {
 903                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 904                         c->error_idx = i;
 905                         return 0;
 906                 }
 907         }
 908         return 1;
 909 }
 910
 911 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 912 {
 913         struct video_device *vfd = video_devdata(file);
 914         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 915         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 916         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 917         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 918         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 919         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 920
 921         if (ops == NULL)
 922                 return -EINVAL;
 923
 924         switch (type) {
 925         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 926                 if (is_vid && is_rx &&
 927                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 928                         return 0;
 929                 break;
 930         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 931                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 932                         return 0;
 933                 break;
 934         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 935                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 936                         return 0;
 937                 break;
 938         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 939                 if (is_vid && is_tx &&
 940                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 941                         return 0;
 942                 break;
 943         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 944                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 945                         return 0;
 946                 break;
 947         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 948                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 949                         return 0;
 950                 break;
 951         case V4L2_BUF_TYPE_VBI_CAPTURE:
 952                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VBI_OUTPUT:
 956                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 960                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 961                         return 0;
 962                 break;
 963         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 964                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 965                         return 0;
 966                 break;
 967         case V4L2_BUF_TYPE_SDR_CAPTURE:
 968                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 969                         return 0;
 970                 break;
 971         default:
 972                 break;
 973         }
 974         return -EINVAL;
 975 }
 976
 977 static void v4l_sanitize_format(struct v4l2_format *fmt)
 978 {
 979         unsigned int offset;
 980
 981         /*
 982          * The v4l2_pix_format structure has been extended with fields that were
 983          * not previously required to be set to zero by applications. The priv
 984          * field, when set to a magic value, indicates the the extended fields
 985          * are valid. Otherwise they will contain undefined values. To simplify
 986          * the API towards drivers zero the extended fields and set the priv
 987          * field to the magic value when the extended pixel format structure
 988          * isn't used by applications.
 989          */
 990
 991         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 992             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 993                 return;
 994
 995         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
 996                 return;
 997
 998         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
 999
1000         offset = offsetof(struct v4l2_pix_format, priv)
1001                + sizeof(fmt->fmt.pix.priv);
1002         memset(((void *)&fmt->fmt.pix) + offset, 0,
1003                sizeof(fmt->fmt.pix) - offset);
1004 }
1005
1006 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1007                                 struct file *file, void *fh, void *arg)
1008 {
1009         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1010         int ret;
1011
1012         cap->version = LINUX_VERSION_CODE;
1013
1014         ret = ops->vidioc_querycap(file, fh, cap);
1015
1016         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1017         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1018
1019         return ret;
1020 }
1021
1022 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1023                                 struct file *file, void *fh, void *arg)
1024 {
1025         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1026 }
1027
1028 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1029                                 struct file *file, void *fh, void *arg)
1030 {
1031         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1032 }
1033
1034 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1035                                 struct file *file, void *fh, void *arg)
1036 {
1037         struct video_device *vfd;
1038         u32 *p = arg;
1039
1040         if (ops->vidioc_g_priority)
1041                 return ops->vidioc_g_priority(file, fh, arg);
1042         vfd = video_devdata(file);
1043         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
1044         return 0;
1045 }
1046
1047 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1048                                 struct file *file, void *fh, void *arg)
1049 {
1050         struct video_device *vfd;
1051         struct v4l2_fh *vfh;
1052         u32 *p = arg;
1053
1054         if (ops->vidioc_s_priority)
1055                 return ops->vidioc_s_priority(file, fh, *p);
1056         vfd = video_devdata(file);
1057         vfh = file->private_data;
1058         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1059 }
1060
1061 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1062                                 struct file *file, void *fh, void *arg)
1063 {
1064         struct video_device *vfd = video_devdata(file);
1065         struct v4l2_input *p = arg;
1066
1067         /*
1068          * We set the flags for CAP_DV_TIMINGS &
1069          * CAP_STD here based on ioctl handler provided by the
1070          * driver. If the driver doesn't support these
1071          * for a specific input, it must override these flags.
1072          */
1073         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1074                 p->capabilities |= V4L2_IN_CAP_STD;
1075
1076         return ops->vidioc_enum_input(file, fh, p);
1077 }
1078
1079 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1080                                 struct file *file, void *fh, void *arg)
1081 {
1082         struct video_device *vfd = video_devdata(file);
1083         struct v4l2_output *p = arg;
1084
1085         /*
1086          * We set the flags for CAP_DV_TIMINGS &
1087          * CAP_STD here based on ioctl handler provided by the
1088          * driver. If the driver doesn't support these
1089          * for a specific output, it must override these flags.
1090          */
1091         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1092                 p->capabilities |= V4L2_OUT_CAP_STD;
1093
1094         return ops->vidioc_enum_output(file, fh, p);
1095 }
1096
1097 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1098                                 struct file *file, void *fh, void *arg)
1099 {
1100         struct v4l2_fmtdesc *p = arg;
1101         struct video_device *vfd = video_devdata(file);
1102         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1103         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1104         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1105         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1106
1107         switch (p->type) {
1108         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1109                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1110                         break;
1111                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1112         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1113                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1114                         break;
1115                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1116         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1117                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1118                         break;
1119                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1120         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1121                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1122                         break;
1123                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1124         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1125                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1126                         break;
1127                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1128         case V4L2_BUF_TYPE_SDR_CAPTURE:
1129                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1130                         break;
1131                 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1132         }
1133         return -EINVAL;
1134 }
1135
1136 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1137                                 struct file *file, void *fh, void *arg)
1138 {
1139         struct v4l2_format *p = arg;
1140         struct video_device *vfd = video_devdata(file);
1141         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1142         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1143         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1144         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1145         int ret;
1146
1147         /*
1148          * fmt can't be cleared for these overlay types due to the 'clips'
1149          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1150          * Those are provided by the user. So handle these two overlay types
1151          * first, and then just do a simple memset for the other types.
1152          */
1153         switch (p->type) {
1154         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1155         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1156                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1157                 u32 clipcount = p->fmt.win.clipcount;
1158                 void __user *bitmap = p->fmt.win.bitmap;
1159
1160                 memset(&p->fmt, 0, sizeof(p->fmt));
1161                 p->fmt.win.clips = clips;
1162                 p->fmt.win.clipcount = clipcount;
1163                 p->fmt.win.bitmap = bitmap;
1164                 break;
1165         }
1166         default:
1167                 memset(&p->fmt, 0, sizeof(p->fmt));
1168                 break;
1169         }
1170
1171         switch (p->type) {
1172         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1173                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1174                         break;
1175                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1176                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1177                 /* just in case the driver zeroed it again */
1178                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1179                 return ret;
1180         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1181                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1182                         break;
1183                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1184         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1185                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1186                         break;
1187                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1188         case V4L2_BUF_TYPE_VBI_CAPTURE:
1189                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1190                         break;
1191                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1192         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1193                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1194                         break;
1195                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1196         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1197                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1198                         break;
1199                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1200                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1201                 /* just in case the driver zeroed it again */
1202                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1203                 return ret;
1204         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1205                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1206                         break;
1207                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1208         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1209                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1210                         break;
1211                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1212         case V4L2_BUF_TYPE_VBI_OUTPUT:
1213                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1214                         break;
1215                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1216         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1217                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1218                         break;
1219                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1220         case V4L2_BUF_TYPE_SDR_CAPTURE:
1221                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1222                         break;
1223                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1224         }
1225         return -EINVAL;
1226 }
1227
1228 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1229                                 struct file *file, void *fh, void *arg)
1230 {
1231         struct v4l2_format *p = arg;
1232         struct video_device *vfd = video_devdata(file);
1233         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1234         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1235         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1236         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1237         int ret;
1238
1239         v4l_sanitize_format(p);
1240
1241         switch (p->type) {
1242         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1243                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1244                         break;
1245                 CLEAR_AFTER_FIELD(p, fmt.pix);
1246                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1247                 /* just in case the driver zeroed it again */
1248                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1249                 return ret;
1250         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1251                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1252                         break;
1253                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1254                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1255         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1256                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1257                         break;
1258                 CLEAR_AFTER_FIELD(p, fmt.win);
1259                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1260         case V4L2_BUF_TYPE_VBI_CAPTURE:
1261                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1262                         break;
1263                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1264                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1265         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1266                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1267                         break;
1268                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1269                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1270         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1271                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1272                         break;
1273                 CLEAR_AFTER_FIELD(p, fmt.pix);
1274                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1275                 /* just in case the driver zeroed it again */
1276                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1277                 return ret;
1278         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1279                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1280                         break;
1281                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1282                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1283         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1284                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1285                         break;
1286                 CLEAR_AFTER_FIELD(p, fmt.win);
1287                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1288         case V4L2_BUF_TYPE_VBI_OUTPUT:
1289                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1290                         break;
1291                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1292                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1293         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1294                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1295                         break;
1296                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1297                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1298         case V4L2_BUF_TYPE_SDR_CAPTURE:
1299                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1300                         break;
1301                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1302                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1303         }
1304         return -EINVAL;
1305 }
1306
1307 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1308                                 struct file *file, void *fh, void *arg)
1309 {
1310         struct v4l2_format *p = arg;
1311         struct video_device *vfd = video_devdata(file);
1312         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1313         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1314         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1315         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1316         int ret;
1317
1318         v4l_sanitize_format(p);
1319
1320         switch (p->type) {
1321         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1322                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1323                         break;
1324                 CLEAR_AFTER_FIELD(p, fmt.pix);
1325                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1326                 /* just in case the driver zeroed it again */
1327                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1328                 return ret;
1329         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1330                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1331                         break;
1332                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1333                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1334         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1335                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1336                         break;
1337                 CLEAR_AFTER_FIELD(p, fmt.win);
1338                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1339         case V4L2_BUF_TYPE_VBI_CAPTURE:
1340                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1341                         break;
1342                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1343                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1344         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1345                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1346                         break;
1347                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1348                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1349         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1350                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1351                         break;
1352                 CLEAR_AFTER_FIELD(p, fmt.pix);
1353                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1354                 /* just in case the driver zeroed it again */
1355                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1356                 return ret;
1357         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1358                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1359                         break;
1360                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1361                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1362         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1363                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1364                         break;
1365                 CLEAR_AFTER_FIELD(p, fmt.win);
1366                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1367         case V4L2_BUF_TYPE_VBI_OUTPUT:
1368                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1369                         break;
1370                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1371                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1372         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1373                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1374                         break;
1375                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1376                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1377         case V4L2_BUF_TYPE_SDR_CAPTURE:
1378                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1379                         break;
1380                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1381                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1382         }
1383         return -EINVAL;
1384 }
1385
1386 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1387                                 struct file *file, void *fh, void *arg)
1388 {
1389         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1390 }
1391
1392 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1393                                 struct file *file, void *fh, void *arg)
1394 {
1395         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1396 }
1397
1398 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1399                                 struct file *file, void *fh, void *arg)
1400 {
1401         struct video_device *vfd = video_devdata(file);
1402         struct v4l2_tuner *p = arg;
1403         int err;
1404
1405         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1406                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1407         err = ops->vidioc_g_tuner(file, fh, p);
1408         if (!err)
1409                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1410         return err;
1411 }
1412
1413 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1414                                 struct file *file, void *fh, void *arg)
1415 {
1416         struct video_device *vfd = video_devdata(file);
1417         struct v4l2_tuner *p = arg;
1418
1419         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1420                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1421         return ops->vidioc_s_tuner(file, fh, p);
1422 }
1423
1424 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1425                                 struct file *file, void *fh, void *arg)
1426 {
1427         struct v4l2_modulator *p = arg;
1428         int err;
1429
1430         err = ops->vidioc_g_modulator(file, fh, p);
1431         if (!err)
1432                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1433         return err;
1434 }
1435
1436 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1437                                 struct file *file, void *fh, void *arg)
1438 {
1439         struct video_device *vfd = video_devdata(file);
1440         struct v4l2_frequency *p = arg;
1441
1442         if (vfd->vfl_type == VFL_TYPE_SDR)
1443                 p->type = V4L2_TUNER_ADC;
1444         else
1445                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1446                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1447         return ops->vidioc_g_frequency(file, fh, p);
1448 }
1449
1450 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1451                                 struct file *file, void *fh, void *arg)
1452 {
1453         struct video_device *vfd = video_devdata(file);
1454         const struct v4l2_frequency *p = arg;
1455         enum v4l2_tuner_type type;
1456
1457         if (vfd->vfl_type == VFL_TYPE_SDR) {
1458                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1459                         return -EINVAL;
1460         } else {
1461                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1462                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1463                 if (type != p->type)
1464                         return -EINVAL;
1465         }
1466         return ops->vidioc_s_frequency(file, fh, p);
1467 }
1468
1469 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1470                                 struct file *file, void *fh, void *arg)
1471 {
1472         struct video_device *vfd = video_devdata(file);
1473         struct v4l2_standard *p = arg;
1474         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1475         unsigned int index = p->index, i, j = 0;
1476         const char *descr = "";
1477
1478         /* Return -ENODATA if the tvnorms for the current input
1479            or output is 0, meaning that it doesn't support this API. */
1480         if (id == 0)
1481                 return -ENODATA;
1482
1483         /* Return norm array in a canonical way */
1484         for (i = 0; i <= index && id; i++) {
1485                 /* last std value in the standards array is 0, so this
1486                    while always ends there since (id & 0) == 0. */
1487                 while ((id & standards[j].std) != standards[j].std)
1488                         j++;
1489                 curr_id = standards[j].std;
1490                 descr = standards[j].descr;
1491                 j++;
1492                 if (curr_id == 0)
1493                         break;
1494                 if (curr_id != V4L2_STD_PAL &&
1495                                 curr_id != V4L2_STD_SECAM &&
1496                                 curr_id != V4L2_STD_NTSC)
1497                         id &= ~curr_id;
1498         }
1499         if (i <= index)
1500                 return -EINVAL;
1501
1502         v4l2_video_std_construct(p, curr_id, descr);
1503         return 0;
1504 }
1505
1506 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1507                                 struct file *file, void *fh, void *arg)
1508 {
1509         struct video_device *vfd = video_devdata(file);
1510         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1511
1512         norm = id & vfd->tvnorms;
1513         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1514                 return -EINVAL;
1515
1516         /* Calls the specific handler */
1517         return ops->vidioc_s_std(file, fh, norm);
1518 }
1519
1520 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1521                                 struct file *file, void *fh, void *arg)
1522 {
1523         struct video_device *vfd = video_devdata(file);
1524         v4l2_std_id *p = arg;
1525
1526         /*
1527          * If no signal is detected, then the driver should return
1528          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1529          * any standards that do not apply removed.
1530          *
1531          * This means that tuners, audio and video decoders can join
1532          * their efforts to improve the standards detection.
1533          */
1534         *p = vfd->tvnorms;
1535         return ops->vidioc_querystd(file, fh, arg);
1536 }
1537
1538 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1539                                 struct file *file, void *fh, void *arg)
1540 {
1541         struct video_device *vfd = video_devdata(file);
1542         struct v4l2_hw_freq_seek *p = arg;
1543         enum v4l2_tuner_type type;
1544
1545         /* s_hw_freq_seek is not supported for SDR for now */
1546         if (vfd->vfl_type == VFL_TYPE_SDR)
1547                 return -EINVAL;
1548
1549         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1550                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1551         if (p->type != type)
1552                 return -EINVAL;
1553         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1554 }
1555
1556 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1557                                 struct file *file, void *fh, void *arg)
1558 {
1559         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1560 }
1561
1562 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1563                                 struct file *file, void *fh, void *arg)
1564 {
1565         struct v4l2_requestbuffers *p = arg;
1566         int ret = check_fmt(file, p->type);
1567
1568         if (ret)
1569                 return ret;
1570
1571         CLEAR_AFTER_FIELD(p, memory);
1572
1573         return ops->vidioc_reqbufs(file, fh, p);
1574 }
1575
1576 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1577                                 struct file *file, void *fh, void *arg)
1578 {
1579         struct v4l2_buffer *p = arg;
1580         int ret = check_fmt(file, p->type);
1581
1582         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1583 }
1584
1585 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1586                                 struct file *file, void *fh, void *arg)
1587 {
1588         struct v4l2_buffer *p = arg;
1589         int ret = check_fmt(file, p->type);
1590
1591         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1592 }
1593
1594 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1595                                 struct file *file, void *fh, void *arg)
1596 {
1597         struct v4l2_buffer *p = arg;
1598         int ret = check_fmt(file, p->type);
1599
1600         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1601 }
1602
1603 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1604                                 struct file *file, void *fh, void *arg)
1605 {
1606         struct v4l2_create_buffers *create = arg;
1607         int ret = check_fmt(file, create->format.type);
1608
1609         if (ret)
1610                 return ret;
1611
1612         v4l_sanitize_format(&create->format);
1613
1614         ret = ops->vidioc_create_bufs(file, fh, create);
1615
1616         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1617             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1618                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1619
1620         return ret;
1621 }
1622
1623 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1624                                 struct file *file, void *fh, void *arg)
1625 {
1626         struct v4l2_buffer *b = arg;
1627         int ret = check_fmt(file, b->type);
1628
1629         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1630 }
1631
1632 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1633                                 struct file *file, void *fh, void *arg)
1634 {
1635         struct v4l2_streamparm *p = arg;
1636         v4l2_std_id std;
1637         int ret = check_fmt(file, p->type);
1638
1639         if (ret)
1640                 return ret;
1641         if (ops->vidioc_g_parm)
1642                 return ops->vidioc_g_parm(file, fh, p);
1643         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1644             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1645                 return -EINVAL;
1646         p->parm.capture.readbuffers = 2;
1647         ret = ops->vidioc_g_std(file, fh, &std);
1648         if (ret == 0)
1649                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1650         return ret;
1651 }
1652
1653 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1654                                 struct file *file, void *fh, void *arg)
1655 {
1656         struct v4l2_streamparm *p = arg;
1657         int ret = check_fmt(file, p->type);
1658
1659         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1660 }
1661
1662 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1663                                 struct file *file, void *fh, void *arg)
1664 {
1665         struct video_device *vfd = video_devdata(file);
1666         struct v4l2_queryctrl *p = arg;
1667         struct v4l2_fh *vfh =
1668                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1669
1670         if (vfh && vfh->ctrl_handler)
1671                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1672         if (vfd->ctrl_handler)
1673                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1674         if (ops->vidioc_queryctrl)
1675                 return ops->vidioc_queryctrl(file, fh, p);
1676         return -ENOTTY;
1677 }
1678
1679 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1680                                 struct file *file, void *fh, void *arg)
1681 {
1682         struct video_device *vfd = video_devdata(file);
1683         struct v4l2_query_ext_ctrl *p = arg;
1684         struct v4l2_fh *vfh =
1685                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1686
1687         if (vfh && vfh->ctrl_handler)
1688                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1689         if (vfd->ctrl_handler)
1690                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1691         if (ops->vidioc_query_ext_ctrl)
1692                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1693         return -ENOTTY;
1694 }
1695
1696 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1697                                 struct file *file, void *fh, void *arg)
1698 {
1699         struct video_device *vfd = video_devdata(file);
1700         struct v4l2_querymenu *p = arg;
1701         struct v4l2_fh *vfh =
1702                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1703
1704         if (vfh && vfh->ctrl_handler)
1705                 return v4l2_querymenu(vfh->ctrl_handler, p);
1706         if (vfd->ctrl_handler)
1707                 return v4l2_querymenu(vfd->ctrl_handler, p);
1708         if (ops->vidioc_querymenu)
1709                 return ops->vidioc_querymenu(file, fh, p);
1710         return -ENOTTY;
1711 }
1712
1713 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1714                                 struct file *file, void *fh, void *arg)
1715 {
1716         struct video_device *vfd = video_devdata(file);
1717         struct v4l2_control *p = arg;
1718         struct v4l2_fh *vfh =
1719                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1720         struct v4l2_ext_controls ctrls;
1721         struct v4l2_ext_control ctrl;
1722
1723         if (vfh && vfh->ctrl_handler)
1724                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1725         if (vfd->ctrl_handler)
1726                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1727         if (ops->vidioc_g_ctrl)
1728                 return ops->vidioc_g_ctrl(file, fh, p);
1729         if (ops->vidioc_g_ext_ctrls == NULL)
1730                 return -ENOTTY;
1731
1732         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1733         ctrls.count = 1;
1734         ctrls.controls = &ctrl;
1735         ctrl.id = p->id;
1736         ctrl.value = p->value;
1737         if (check_ext_ctrls(&ctrls, 1)) {
1738                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1739
1740                 if (ret == 0)
1741                         p->value = ctrl.value;
1742                 return ret;
1743         }
1744         return -EINVAL;
1745 }
1746
1747 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1748                                 struct file *file, void *fh, void *arg)
1749 {
1750         struct video_device *vfd = video_devdata(file);
1751         struct v4l2_control *p = arg;
1752         struct v4l2_fh *vfh =
1753                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1754         struct v4l2_ext_controls ctrls;
1755         struct v4l2_ext_control ctrl;
1756
1757         if (vfh && vfh->ctrl_handler)
1758                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1759         if (vfd->ctrl_handler)
1760                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1761         if (ops->vidioc_s_ctrl)
1762                 return ops->vidioc_s_ctrl(file, fh, p);
1763         if (ops->vidioc_s_ext_ctrls == NULL)
1764                 return -ENOTTY;
1765
1766         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1767         ctrls.count = 1;
1768         ctrls.controls = &ctrl;
1769         ctrl.id = p->id;
1770         ctrl.value = p->value;
1771         if (check_ext_ctrls(&ctrls, 1))
1772                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1773         return -EINVAL;
1774 }
1775
1776 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1777                                 struct file *file, void *fh, void *arg)
1778 {
1779         struct video_device *vfd = video_devdata(file);
1780         struct v4l2_ext_controls *p = arg;
1781         struct v4l2_fh *vfh =
1782                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1783
1784         p->error_idx = p->count;
1785         if (vfh && vfh->ctrl_handler)
1786                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1787         if (vfd->ctrl_handler)
1788                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1789         if (ops->vidioc_g_ext_ctrls == NULL)
1790                 return -ENOTTY;
1791         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1792                                         -EINVAL;
1793 }
1794
1795 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1796                                 struct file *file, void *fh, void *arg)
1797 {
1798         struct video_device *vfd = video_devdata(file);
1799         struct v4l2_ext_controls *p = arg;
1800         struct v4l2_fh *vfh =
1801                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1802
1803         p->error_idx = p->count;
1804         if (vfh && vfh->ctrl_handler)
1805                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1806         if (vfd->ctrl_handler)
1807                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1808         if (ops->vidioc_s_ext_ctrls == NULL)
1809                 return -ENOTTY;
1810         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1811                                         -EINVAL;
1812 }
1813
1814 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1815                                 struct file *file, void *fh, void *arg)
1816 {
1817         struct video_device *vfd = video_devdata(file);
1818         struct v4l2_ext_controls *p = arg;
1819         struct v4l2_fh *vfh =
1820                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1821
1822         p->error_idx = p->count;
1823         if (vfh && vfh->ctrl_handler)
1824                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1825         if (vfd->ctrl_handler)
1826                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1827         if (ops->vidioc_try_ext_ctrls == NULL)
1828                 return -ENOTTY;
1829         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1830                                         -EINVAL;
1831 }
1832
1833 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1834                                 struct file *file, void *fh, void *arg)
1835 {
1836         struct v4l2_crop *p = arg;
1837         struct v4l2_selection s = {
1838                 .type = p->type,
1839         };
1840         int ret;
1841
1842         if (ops->vidioc_g_crop)
1843                 return ops->vidioc_g_crop(file, fh, p);
1844         /* simulate capture crop using selection api */
1845
1846         /* crop means compose for output devices */
1847         if (V4L2_TYPE_IS_OUTPUT(p->type))
1848                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1849         else
1850                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1851
1852         ret = ops->vidioc_g_selection(file, fh, &s);
1853
1854         /* copying results to old structure on success */
1855         if (!ret)
1856                 p->c = s.r;
1857         return ret;
1858 }
1859
1860 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1861                                 struct file *file, void *fh, void *arg)
1862 {
1863         struct v4l2_crop *p = arg;
1864         struct v4l2_selection s = {
1865                 .type = p->type,
1866                 .r = p->c,
1867         };
1868
1869         if (ops->vidioc_s_crop)
1870                 return ops->vidioc_s_crop(file, fh, p);
1871         /* simulate capture crop using selection api */
1872
1873         /* crop means compose for output devices */
1874         if (V4L2_TYPE_IS_OUTPUT(p->type))
1875                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1876         else
1877                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1878
1879         return ops->vidioc_s_selection(file, fh, &s);
1880 }
1881
1882 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1883                                 struct file *file, void *fh, void *arg)
1884 {
1885         struct v4l2_cropcap *p = arg;
1886
1887         if (ops->vidioc_g_selection) {
1888                 struct v4l2_selection s = { .type = p->type };
1889                 int ret;
1890
1891                 /* obtaining bounds */
1892                 if (V4L2_TYPE_IS_OUTPUT(p->type))
1893                         s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1894                 else
1895                         s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1896
1897                 ret = ops->vidioc_g_selection(file, fh, &s);
1898                 if (ret)
1899                         return ret;
1900                 p->bounds = s.r;
1901
1902                 /* obtaining defrect */
1903                 if (V4L2_TYPE_IS_OUTPUT(p->type))
1904                         s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1905                 else
1906                         s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1907
1908                 ret = ops->vidioc_g_selection(file, fh, &s);
1909                 if (ret)
1910                         return ret;
1911                 p->defrect = s.r;
1912         }
1913
1914         /* setting trivial pixelaspect */
1915         p->pixelaspect.numerator = 1;
1916         p->pixelaspect.denominator = 1;
1917
1918         if (ops->vidioc_cropcap)
1919                 return ops->vidioc_cropcap(file, fh, p);
1920
1921         return 0;
1922 }
1923
1924 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1925                                 struct file *file, void *fh, void *arg)
1926 {
1927         struct video_device *vfd = video_devdata(file);
1928         int ret;
1929
1930         if (vfd->v4l2_dev)
1931                 pr_info("%s: =================  START STATUS  =================\n",
1932                         vfd->v4l2_dev->name);
1933         ret = ops->vidioc_log_status(file, fh);
1934         if (vfd->v4l2_dev)
1935                 pr_info("%s: ==================  END STATUS  ==================\n",
1936                         vfd->v4l2_dev->name);
1937         return ret;
1938 }
1939
1940 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1941                                 struct file *file, void *fh, void *arg)
1942 {
1943 #ifdef CONFIG_VIDEO_ADV_DEBUG
1944         struct v4l2_dbg_register *p = arg;
1945         struct video_device *vfd = video_devdata(file);
1946         struct v4l2_subdev *sd;
1947         int idx = 0;
1948
1949         if (!capable(CAP_SYS_ADMIN))
1950                 return -EPERM;
1951         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1952                 if (vfd->v4l2_dev == NULL)
1953                         return -EINVAL;
1954                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1955                         if (p->match.addr == idx++)
1956                                 return v4l2_subdev_call(sd, core, g_register, p);
1957                 return -EINVAL;
1958         }
1959         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1960             (ops->vidioc_g_chip_info || p->match.addr == 0))
1961                 return ops->vidioc_g_register(file, fh, p);
1962         return -EINVAL;
1963 #else
1964         return -ENOTTY;
1965 #endif
1966 }
1967
1968 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1969                                 struct file *file, void *fh, void *arg)
1970 {
1971 #ifdef CONFIG_VIDEO_ADV_DEBUG
1972         const struct v4l2_dbg_register *p = arg;
1973         struct video_device *vfd = video_devdata(file);
1974         struct v4l2_subdev *sd;
1975         int idx = 0;
1976
1977         if (!capable(CAP_SYS_ADMIN))
1978                 return -EPERM;
1979         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1980                 if (vfd->v4l2_dev == NULL)
1981                         return -EINVAL;
1982                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1983                         if (p->match.addr == idx++)
1984                                 return v4l2_subdev_call(sd, core, s_register, p);
1985                 return -EINVAL;
1986         }
1987         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1988             (ops->vidioc_g_chip_info || p->match.addr == 0))
1989                 return ops->vidioc_s_register(file, fh, p);
1990         return -EINVAL;
1991 #else
1992         return -ENOTTY;
1993 #endif
1994 }
1995
1996 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1997                                 struct file *file, void *fh, void *arg)
1998 {
1999 #ifdef CONFIG_VIDEO_ADV_DEBUG
2000         struct video_device *vfd = video_devdata(file);
2001         struct v4l2_dbg_chip_info *p = arg;
2002         struct v4l2_subdev *sd;
2003         int idx = 0;
2004
2005         switch (p->match.type) {
2006         case V4L2_CHIP_MATCH_BRIDGE:
2007                 if (ops->vidioc_s_register)
2008                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2009                 if (ops->vidioc_g_register)
2010                         p->flags |= V4L2_CHIP_FL_READABLE;
2011                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2012                 if (ops->vidioc_g_chip_info)
2013                         return ops->vidioc_g_chip_info(file, fh, arg);
2014                 if (p->match.addr)
2015                         return -EINVAL;
2016                 return 0;
2017
2018         case V4L2_CHIP_MATCH_SUBDEV:
2019                 if (vfd->v4l2_dev == NULL)
2020                         break;
2021                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2022                         if (p->match.addr != idx++)
2023                                 continue;
2024                         if (sd->ops->core && sd->ops->core->s_register)
2025                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2026                         if (sd->ops->core && sd->ops->core->g_register)
2027                                 p->flags |= V4L2_CHIP_FL_READABLE;
2028                         strlcpy(p->name, sd->name, sizeof(p->name));
2029                         return 0;
2030                 }
2031                 break;
2032         }
2033         return -EINVAL;
2034 #else
2035         return -ENOTTY;
2036 #endif
2037 }
2038
2039 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2040                                 struct file *file, void *fh, void *arg)
2041 {
2042         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2043 }
2044
2045 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2046                                 struct file *file, void *fh, void *arg)
2047 {
2048         return ops->vidioc_subscribe_event(fh, arg);
2049 }
2050
2051 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2052                                 struct file *file, void *fh, void *arg)
2053 {
2054         return ops->vidioc_unsubscribe_event(fh, arg);
2055 }
2056
2057 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2058                                 struct file *file, void *fh, void *arg)
2059 {
2060         struct v4l2_sliced_vbi_cap *p = arg;
2061         int ret = check_fmt(file, p->type);
2062
2063         if (ret)
2064                 return ret;
2065
2066         /* Clear up to type, everything after type is zeroed already */
2067         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2068
2069         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2070 }
2071
2072 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2073                                 struct file *file, void *fh, void *arg)
2074 {
2075         struct video_device *vfd = video_devdata(file);
2076         struct v4l2_frequency_band *p = arg;
2077         enum v4l2_tuner_type type;
2078         int err;
2079
2080         if (vfd->vfl_type == VFL_TYPE_SDR) {
2081                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
2082                         return -EINVAL;
2083                 type = p->type;
2084         } else {
2085                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2086                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2087                 if (type != p->type)
2088                         return -EINVAL;
2089         }
2090         if (ops->vidioc_enum_freq_bands) {
2091                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2092                 if (err != -ENOTTY)
2093                         return err;
2094         }
2095         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2096                 struct v4l2_tuner t = {
2097                         .index = p->tuner,
2098                         .type = type,
2099                 };
2100
2101                 if (p->index)
2102                         return -EINVAL;
2103                 err = ops->vidioc_g_tuner(file, fh, &t);
2104                 if (err)
2105                         return err;
2106                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2107                 p->rangelow = t.rangelow;
2108                 p->rangehigh = t.rangehigh;
2109                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2110                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2111                 return 0;
2112         }
2113         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2114                 struct v4l2_modulator m = {
2115                         .index = p->tuner,
2116                 };
2117
2118                 if (type != V4L2_TUNER_RADIO)
2119                         return -EINVAL;
2120                 if (p->index)
2121                         return -EINVAL;
2122                 err = ops->vidioc_g_modulator(file, fh, &m);
2123                 if (err)
2124                         return err;
2125                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2126                 p->rangelow = m.rangelow;
2127                 p->rangehigh = m.rangehigh;
2128                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2129                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2130                 return 0;
2131         }
2132         return -ENOTTY;
2133 }
2134
2135 struct v4l2_ioctl_info {
2136         unsigned int ioctl;
2137         u32 flags;
2138         const char * const name;
2139         union {
2140                 u32 offset;
2141                 int (*func)(const struct v4l2_ioctl_ops *ops,
2142                                 struct file *file, void *fh, void *p);
2143         } u;
2144         void (*debug)(const void *arg, bool write_only);
2145 };
2146
2147 /* This control needs a priority check */
2148 #define INFO_FL_PRIO    (1 << 0)
2149 /* This control can be valid if the filehandle passes a control handler. */
2150 #define INFO_FL_CTRL    (1 << 1)
2151 /* This is a standard ioctl, no need for special code */
2152 #define INFO_FL_STD     (1 << 2)
2153 /* This is ioctl has its own function */
2154 #define INFO_FL_FUNC    (1 << 3)
2155 /* Queuing ioctl */
2156 #define INFO_FL_QUEUE   (1 << 4)
2157 /* Zero struct from after the field to the end */
2158 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2159         ((offsetof(struct v4l2_struct, field) +                 \
2160           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2161 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2162
2163 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2164         [_IOC_NR(_ioctl)] = {                                           \
2165                 .ioctl = _ioctl,                                        \
2166                 .flags = _flags | INFO_FL_STD,                          \
2167                 .name = #_ioctl,                                        \
2168                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2169                 .debug = _debug,                                        \
2170         }
2171
2172 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2173         [_IOC_NR(_ioctl)] = {                                           \
2174                 .ioctl = _ioctl,                                        \
2175                 .flags = _flags | INFO_FL_FUNC,                         \
2176                 .name = #_ioctl,                                        \
2177                 .u.func = _func,                                        \
2178                 .debug = _debug,                                        \
2179         }
2180
2181 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2182         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2183         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2184         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2185         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2186         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2187         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2188         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2189         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2190         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2191         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2192         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2193         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2194         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2195         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2196         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2197         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2198         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2199         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2200         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2201         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2202         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2203         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2204         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2205         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2206         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2207         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2208         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2209         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2210         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2211         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2212         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2213         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2214         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2215         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2216         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2217         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2218         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2219         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2220         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2221         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2222         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2223         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2224         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2225         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2226         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2227         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2228         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2229         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2230         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2231         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2232         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2233         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2234         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2235         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2236         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)),
2237         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2238         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2239         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2240         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2241         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2242         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2243         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2244         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2245         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2246         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2247         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2248         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2249         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2250         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2251         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2252         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2253         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2254         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2255         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2256         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2257         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2258         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2259         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2260         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2261         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2262         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)),
2263         IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2264 };
2265 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2266
2267 bool v4l2_is_known_ioctl(unsigned int cmd)
2268 {
2269         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2270                 return false;
2271         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2272 }
2273
2274 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2275 {
2276         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2277                 return vdev->lock;
2278         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2279                 return NULL;
2280         if (vdev->queue && vdev->queue->lock &&
2281                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2282                 return vdev->queue->lock;
2283         return vdev->lock;
2284 }
2285
2286 /* Common ioctl debug function. This function can be used by
2287    external ioctl messages as well as internal V4L ioctl */
2288 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2289 {
2290         const char *dir, *type;
2291
2292         if (prefix)
2293                 printk(KERN_DEBUG "%s: ", prefix);
2294
2295         switch (_IOC_TYPE(cmd)) {
2296         case 'd':
2297                 type = "v4l2_int";
2298                 break;
2299         case 'V':
2300                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2301                         type = "v4l2";
2302                         break;
2303                 }
2304                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2305                 return;
2306         default:
2307                 type = "unknown";
2308                 break;
2309         }
2310
2311         switch (_IOC_DIR(cmd)) {
2312         case _IOC_NONE:              dir = "--"; break;
2313         case _IOC_READ:              dir = "r-"; break;
2314         case _IOC_WRITE:             dir = "-w"; break;
2315         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2316         default:                     dir = "*ERR*"; break;
2317         }
2318         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2319                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2320 }
2321 EXPORT_SYMBOL(v4l_printk_ioctl);
2322
2323 static long __video_do_ioctl(struct file *file,
2324                 unsigned int cmd, void *arg)
2325 {
2326         struct video_device *vfd = video_devdata(file);
2327         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2328         bool write_only = false;
2329         struct v4l2_ioctl_info default_info;
2330         const struct v4l2_ioctl_info *info;
2331         void *fh = file->private_data;
2332         struct v4l2_fh *vfh = NULL;
2333         int debug = vfd->debug;
2334         long ret = -ENOTTY;
2335
2336         if (ops == NULL) {
2337                 pr_warn("%s: has no ioctl_ops.\n",
2338                                 video_device_node_name(vfd));
2339                 return ret;
2340         }
2341
2342         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2343                 vfh = file->private_data;
2344
2345         if (v4l2_is_known_ioctl(cmd)) {
2346                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2347
2348                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2349                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2350                         goto done;
2351
2352                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2353                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2354                         if (ret)
2355                                 goto done;
2356                 }
2357         } else {
2358                 default_info.ioctl = cmd;
2359                 default_info.flags = 0;
2360                 default_info.debug = v4l_print_default;
2361                 info = &default_info;
2362         }
2363
2364         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2365         if (info->flags & INFO_FL_STD) {
2366                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2367                 const void *p = vfd->ioctl_ops;
2368                 const vidioc_op *vidioc = p + info->u.offset;
2369
2370                 ret = (*vidioc)(file, fh, arg);
2371         } else if (info->flags & INFO_FL_FUNC) {
2372                 ret = info->u.func(ops, file, fh, arg);
2373         } else if (!ops->vidioc_default) {
2374                 ret = -ENOTTY;
2375         } else {
2376                 ret = ops->vidioc_default(file, fh,
2377                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2378                         cmd, arg);
2379         }
2380
2381 done:
2382         if (debug) {
2383                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2384                 if (ret < 0)
2385                         pr_cont(": error %ld", ret);
2386                 if (debug == V4L2_DEBUG_IOCTL)
2387                         pr_cont("\n");
2388                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2389                         info->debug(arg, write_only);
2390                 else {
2391                         pr_cont(": ");
2392                         info->debug(arg, write_only);
2393                 }
2394         }
2395
2396         return ret;
2397 }
2398
2399 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2400                             void __user **user_ptr, void ***kernel_ptr)
2401 {
2402         int ret = 0;
2403
2404         switch (cmd) {
2405         case VIDIOC_PREPARE_BUF:
2406         case VIDIOC_QUERYBUF:
2407         case VIDIOC_QBUF:
2408         case VIDIOC_DQBUF: {
2409                 struct v4l2_buffer *buf = parg;
2410
2411                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2412                         if (buf->length > VIDEO_MAX_PLANES) {
2413                                 ret = -EINVAL;
2414                                 break;
2415                         }
2416                         *user_ptr = (void __user *)buf->m.planes;
2417                         *kernel_ptr = (void **)&buf->m.planes;
2418                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2419                         ret = 1;
2420                 }
2421                 break;
2422         }
2423
2424         case VIDIOC_G_EDID:
2425         case VIDIOC_S_EDID: {
2426                 struct v4l2_edid *edid = parg;
2427
2428                 if (edid->blocks) {
2429                         if (edid->blocks > 256) {
2430                                 ret = -EINVAL;
2431                                 break;
2432                         }
2433                         *user_ptr = (void __user *)edid->edid;
2434                         *kernel_ptr = (void **)&edid->edid;
2435                         *array_size = edid->blocks * 128;
2436                         ret = 1;
2437                 }
2438                 break;
2439         }
2440
2441         case VIDIOC_S_EXT_CTRLS:
2442         case VIDIOC_G_EXT_CTRLS:
2443         case VIDIOC_TRY_EXT_CTRLS: {
2444                 struct v4l2_ext_controls *ctrls = parg;
2445
2446                 if (ctrls->count != 0) {
2447                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2448                                 ret = -EINVAL;
2449                                 break;
2450                         }
2451                         *user_ptr = (void __user *)ctrls->controls;
2452                         *kernel_ptr = (void **)&ctrls->controls;
2453                         *array_size = sizeof(struct v4l2_ext_control)
2454                                     * ctrls->count;
2455                         ret = 1;
2456                 }
2457                 break;
2458         }
2459         }
2460
2461         return ret;
2462 }
2463
2464 long
2465 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2466                v4l2_kioctl func)
2467 {
2468         char    sbuf[128];
2469         void    *mbuf = NULL;
2470         void    *parg = (void *)arg;
2471         long    err  = -EINVAL;
2472         bool    has_array_args;
2473         size_t  array_size = 0;
2474         void __user *user_ptr = NULL;
2475         void    **kernel_ptr = NULL;
2476
2477         /*  Copy arguments into temp kernel buffer  */
2478         if (_IOC_DIR(cmd) != _IOC_NONE) {
2479                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2480                         parg = sbuf;
2481                 } else {
2482                         /* too big to allocate from stack */
2483                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2484                         if (NULL == mbuf)
2485                                 return -ENOMEM;
2486                         parg = mbuf;
2487                 }
2488
2489                 err = -EFAULT;
2490                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2491                         unsigned int n = _IOC_SIZE(cmd);
2492
2493                         /*
2494                          * In some cases, only a few fields are used as input,
2495                          * i.e. when the app sets "index" and then the driver
2496                          * fills in the rest of the structure for the thing
2497                          * with that index.  We only need to copy up the first
2498                          * non-input field.
2499                          */
2500                         if (v4l2_is_known_ioctl(cmd)) {
2501                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2502                                 if (flags & INFO_FL_CLEAR_MASK)
2503                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2504                         }
2505
2506                         if (copy_from_user(parg, (void __user *)arg, n))
2507                                 goto out;
2508
2509                         /* zero out anything we don't copy from userspace */
2510                         if (n < _IOC_SIZE(cmd))
2511                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2512                 } else {
2513                         /* read-only ioctl */
2514                         memset(parg, 0, _IOC_SIZE(cmd));
2515                 }
2516         }
2517
2518         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2519         if (err < 0)
2520                 goto out;
2521         has_array_args = err;
2522
2523         if (has_array_args) {
2524                 /*
2525                  * When adding new types of array args, make sure that the
2526                  * parent argument to ioctl (which contains the pointer to the
2527                  * array) fits into sbuf (so that mbuf will still remain
2528                  * unused up to here).
2529                  */
2530                 mbuf = kmalloc(array_size, GFP_KERNEL);
2531                 err = -ENOMEM;
2532                 if (NULL == mbuf)
2533                         goto out_array_args;
2534                 err = -EFAULT;
2535                 if (copy_from_user(mbuf, user_ptr, array_size))
2536                         goto out_array_args;
2537                 *kernel_ptr = mbuf;
2538         }
2539
2540         /* Handles IOCTL */
2541         err = func(file, cmd, parg);
2542         if (err == -ENOIOCTLCMD)
2543                 err = -ENOTTY;
2544         if (err == 0) {
2545                 if (cmd == VIDIOC_DQBUF)
2546                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2547                 else if (cmd == VIDIOC_QBUF)
2548                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2549         }
2550
2551         if (has_array_args) {
2552                 *kernel_ptr = (void __force *)user_ptr;
2553                 if (copy_to_user(user_ptr, mbuf, array_size))
2554                         err = -EFAULT;
2555                 goto out_array_args;
2556         }
2557         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2558            results that must be returned. */
2559         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2560                 goto out;
2561
2562 out_array_args:
2563         /*  Copy results into user buffer  */
2564         switch (_IOC_DIR(cmd)) {
2565         case _IOC_READ:
2566         case (_IOC_WRITE | _IOC_READ):
2567                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2568                         err = -EFAULT;
2569                 break;
2570         }
2571
2572 out:
2573         kfree(mbuf);
2574         return err;
2575 }
2576 EXPORT_SYMBOL(video_usercopy);
2577
2578 long video_ioctl2(struct file *file,
2579                unsigned int cmd, unsigned long arg)
2580 {
2581         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2582 }
2583 EXPORT_SYMBOL(video_ioctl2);