kernel/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=0x%x, ycbcr_enc=%u, quantization=%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, pix->ycbcr_enc,
 269                         pix->quantization);
 270                 break;
 271         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 272         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 273                 mp = &p->fmt.pix_mp;
 274                 pr_cont(", width=%u, height=%u, "
 275                         "format=%c%c%c%c, field=%s, "
 276                         "colorspace=%d, num_planes=%u, flags=0x%x, "
 277                         "ycbcr_enc=%u, quantization=%u\n",
 278                         mp->width, mp->height,
 279                         (mp->pixelformat & 0xff),
 280                         (mp->pixelformat >>  8) & 0xff,
 281                         (mp->pixelformat >> 16) & 0xff,
 282                         (mp->pixelformat >> 24) & 0xff,
 283                         prt_names(mp->field, v4l2_field_names),
 284                         mp->colorspace, mp->num_planes, mp->flags,
 285                         mp->ycbcr_enc, mp->quantization);
 286                 for (i = 0; i < mp->num_planes; i++)
 287                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 288                                         mp->plane_fmt[i].bytesperline,
 289                                         mp->plane_fmt[i].sizeimage);
 290                 break;
 291         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 292         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 293                 win = &p->fmt.win;
 294                 /* Note: we can't print the clip list here since the clips
 295                  * pointer is a userspace pointer, not a kernelspace
 296                  * pointer. */
 297                 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",
 298                         win->w.width, win->w.height, win->w.left, win->w.top,
 299                         prt_names(win->field, v4l2_field_names),
 300                         win->chromakey, win->clipcount, win->clips,
 301                         win->bitmap, win->global_alpha);
 302                 break;
 303         case V4L2_BUF_TYPE_VBI_CAPTURE:
 304         case V4L2_BUF_TYPE_VBI_OUTPUT:
 305                 vbi = &p->fmt.vbi;
 306                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 307                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 308                         vbi->sampling_rate, vbi->offset,
 309                         vbi->samples_per_line,
 310                         (vbi->sample_format & 0xff),
 311                         (vbi->sample_format >>  8) & 0xff,
 312                         (vbi->sample_format >> 16) & 0xff,
 313                         (vbi->sample_format >> 24) & 0xff,
 314                         vbi->start[0], vbi->start[1],
 315                         vbi->count[0], vbi->count[1]);
 316                 break;
 317         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 318         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 319                 sliced = &p->fmt.sliced;
 320                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 321                                 sliced->service_set, sliced->io_size);
 322                 for (i = 0; i < 24; i++)
 323                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 324                                 sliced->service_lines[0][i],
 325                                 sliced->service_lines[1][i]);
 326                 break;
 327         case V4L2_BUF_TYPE_SDR_CAPTURE:
 328                 sdr = &p->fmt.sdr;
 329                 pr_cont(", pixelformat=%c%c%c%c\n",
 330                         (sdr->pixelformat >>  0) & 0xff,
 331                         (sdr->pixelformat >>  8) & 0xff,
 332                         (sdr->pixelformat >> 16) & 0xff,
 333                         (sdr->pixelformat >> 24) & 0xff);
 334                 break;
 335         }
 336 }
 337
 338 static void v4l_print_framebuffer(const void *arg, bool write_only)
 339 {
 340         const struct v4l2_framebuffer *p = arg;
 341
 342         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 343                 "height=%u, pixelformat=%c%c%c%c, "
 344                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 345                         p->capability, p->flags, p->base,
 346                         p->fmt.width, p->fmt.height,
 347                         (p->fmt.pixelformat & 0xff),
 348                         (p->fmt.pixelformat >>  8) & 0xff,
 349                         (p->fmt.pixelformat >> 16) & 0xff,
 350                         (p->fmt.pixelformat >> 24) & 0xff,
 351                         p->fmt.bytesperline, p->fmt.sizeimage,
 352                         p->fmt.colorspace);
 353 }
 354
 355 static void v4l_print_buftype(const void *arg, bool write_only)
 356 {
 357         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 358 }
 359
 360 static void v4l_print_modulator(const void *arg, bool write_only)
 361 {
 362         const struct v4l2_modulator *p = arg;
 363
 364         if (write_only)
 365                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 366         else
 367                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 368                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 369                         p->index, (int)sizeof(p->name), p->name, p->capability,
 370                         p->rangelow, p->rangehigh, p->txsubchans);
 371 }
 372
 373 static void v4l_print_tuner(const void *arg, bool write_only)
 374 {
 375         const struct v4l2_tuner *p = arg;
 376
 377         if (write_only)
 378                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 379         else
 380                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 381                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 382                         "rxsubchans=0x%x, audmode=%u\n",
 383                         p->index, (int)sizeof(p->name), p->name, p->type,
 384                         p->capability, p->rangelow,
 385                         p->rangehigh, p->signal, p->afc,
 386                         p->rxsubchans, p->audmode);
 387 }
 388
 389 static void v4l_print_frequency(const void *arg, bool write_only)
 390 {
 391         const struct v4l2_frequency *p = arg;
 392
 393         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 394                                 p->tuner, p->type, p->frequency);
 395 }
 396
 397 static void v4l_print_standard(const void *arg, bool write_only)
 398 {
 399         const struct v4l2_standard *p = arg;
 400
 401         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 402                 "framelines=%u\n", p->index,
 403                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 404                 p->frameperiod.numerator,
 405                 p->frameperiod.denominator,
 406                 p->framelines);
 407 }
 408
 409 static void v4l_print_std(const void *arg, bool write_only)
 410 {
 411         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 412 }
 413
 414 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 415 {
 416         const struct v4l2_hw_freq_seek *p = arg;
 417
 418         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 419                 "rangelow=%u, rangehigh=%u\n",
 420                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 421                 p->rangelow, p->rangehigh);
 422 }
 423
 424 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 425 {
 426         const struct v4l2_requestbuffers *p = arg;
 427
 428         pr_cont("count=%d, type=%s, memory=%s\n",
 429                 p->count,
 430                 prt_names(p->type, v4l2_type_names),
 431                 prt_names(p->memory, v4l2_memory_names));
 432 }
 433
 434 static void v4l_print_buffer(const void *arg, bool write_only)
 435 {
 436         const struct v4l2_buffer *p = arg;
 437         const struct v4l2_timecode *tc = &p->timecode;
 438         const struct v4l2_plane *plane;
 439         int i;
 440
 441         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 442                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 443                         p->timestamp.tv_sec / 3600,
 444                         (int)(p->timestamp.tv_sec / 60) % 60,
 445                         (int)(p->timestamp.tv_sec % 60),
 446                         (long)p->timestamp.tv_usec,
 447                         p->index,
 448                         prt_names(p->type, v4l2_type_names),
 449                         p->flags, prt_names(p->field, v4l2_field_names),
 450                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 451
 452         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 453                 pr_cont("\n");
 454                 for (i = 0; i < p->length; ++i) {
 455                         plane = &p->m.planes[i];
 456                         printk(KERN_DEBUG
 457                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 458                                 "offset/userptr=0x%lx, length=%d\n",
 459                                 i, plane->bytesused, plane->data_offset,
 460                                 plane->m.userptr, plane->length);
 461                 }
 462         } else {
 463                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 464                         p->bytesused, p->m.userptr, p->length);
 465         }
 466
 467         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 468                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 469                         tc->hours, tc->minutes, tc->seconds,
 470                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 471 }
 472
 473 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 474 {
 475         const struct v4l2_exportbuffer *p = arg;
 476
 477         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 478                 p->fd, prt_names(p->type, v4l2_type_names),
 479                 p->index, p->plane, p->flags);
 480 }
 481
 482 static void v4l_print_create_buffers(const void *arg, bool write_only)
 483 {
 484         const struct v4l2_create_buffers *p = arg;
 485
 486         pr_cont("index=%d, count=%d, memory=%s, ",
 487                         p->index, p->count,
 488                         prt_names(p->memory, v4l2_memory_names));
 489         v4l_print_format(&p->format, write_only);
 490 }
 491
 492 static void v4l_print_streamparm(const void *arg, bool write_only)
 493 {
 494         const struct v4l2_streamparm *p = arg;
 495
 496         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 497
 498         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 499             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 500                 const struct v4l2_captureparm *c = &p->parm.capture;
 501
 502                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 503                         "extendedmode=%d, readbuffers=%d\n",
 504                         c->capability, c->capturemode,
 505                         c->timeperframe.numerator, c->timeperframe.denominator,
 506                         c->extendedmode, c->readbuffers);
 507         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 508                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 509                 const struct v4l2_outputparm *c = &p->parm.output;
 510
 511                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 512                         "extendedmode=%d, writebuffers=%d\n",
 513                         c->capability, c->outputmode,
 514                         c->timeperframe.numerator, c->timeperframe.denominator,
 515                         c->extendedmode, c->writebuffers);
 516         } else {
 517                 pr_cont("\n");
 518         }
 519 }
 520
 521 static void v4l_print_queryctrl(const void *arg, bool write_only)
 522 {
 523         const struct v4l2_queryctrl *p = arg;
 524
 525         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 526                 "step=%d, default=%d, flags=0x%08x\n",
 527                         p->id, p->type, (int)sizeof(p->name), p->name,
 528                         p->minimum, p->maximum,
 529                         p->step, p->default_value, p->flags);
 530 }
 531
 532 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 533 {
 534         const struct v4l2_query_ext_ctrl *p = arg;
 535
 536         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
 537                 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
 538                 "nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 539                         p->id, p->type, (int)sizeof(p->name), p->name,
 540                         p->minimum, p->maximum,
 541                         p->step, p->default_value, p->flags,
 542                         p->elem_size, p->elems, p->nr_of_dims,
 543                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 544 }
 545
 546 static void v4l_print_querymenu(const void *arg, bool write_only)
 547 {
 548         const struct v4l2_querymenu *p = arg;
 549
 550         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 551 }
 552
 553 static void v4l_print_control(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_control *p = arg;
 556
 557         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 558 }
 559
 560 static void v4l_print_ext_controls(const void *arg, bool write_only)
 561 {
 562         const struct v4l2_ext_controls *p = arg;
 563         int i;
 564
 565         pr_cont("class=0x%x, count=%d, error_idx=%d",
 566                         p->ctrl_class, p->count, p->error_idx);
 567         for (i = 0; i < p->count; i++) {
 568                 if (!p->controls[i].size)
 569                         pr_cont(", id/val=0x%x/0x%x",
 570                                 p->controls[i].id, p->controls[i].value);
 571                 else
 572                         pr_cont(", id/size=0x%x/%u",
 573                                 p->controls[i].id, p->controls[i].size);
 574         }
 575         pr_cont("\n");
 576 }
 577
 578 static void v4l_print_cropcap(const void *arg, bool write_only)
 579 {
 580         const struct v4l2_cropcap *p = arg;
 581
 582         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 583                 "defrect wxh=%dx%d, x,y=%d,%d, "
 584                 "pixelaspect %d/%d\n",
 585                 prt_names(p->type, v4l2_type_names),
 586                 p->bounds.width, p->bounds.height,
 587                 p->bounds.left, p->bounds.top,
 588                 p->defrect.width, p->defrect.height,
 589                 p->defrect.left, p->defrect.top,
 590                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 591 }
 592
 593 static void v4l_print_crop(const void *arg, bool write_only)
 594 {
 595         const struct v4l2_crop *p = arg;
 596
 597         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 598                 prt_names(p->type, v4l2_type_names),
 599                 p->c.width, p->c.height,
 600                 p->c.left, p->c.top);
 601 }
 602
 603 static void v4l_print_selection(const void *arg, bool write_only)
 604 {
 605         const struct v4l2_selection *p = arg;
 606
 607         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 608                 prt_names(p->type, v4l2_type_names),
 609                 p->target, p->flags,
 610                 p->r.width, p->r.height, p->r.left, p->r.top);
 611 }
 612
 613 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 614 {
 615         const struct v4l2_jpegcompression *p = arg;
 616
 617         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 618                 "COM_len=%d, jpeg_markers=0x%x\n",
 619                 p->quality, p->APPn, p->APP_len,
 620                 p->COM_len, p->jpeg_markers);
 621 }
 622
 623 static void v4l_print_enc_idx(const void *arg, bool write_only)
 624 {
 625         const struct v4l2_enc_idx *p = arg;
 626
 627         pr_cont("entries=%d, entries_cap=%d\n",
 628                         p->entries, p->entries_cap);
 629 }
 630
 631 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 632 {
 633         const struct v4l2_encoder_cmd *p = arg;
 634
 635         pr_cont("cmd=%d, flags=0x%x\n",
 636                         p->cmd, p->flags);
 637 }
 638
 639 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_decoder_cmd *p = arg;
 642
 643         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 644
 645         if (p->cmd == V4L2_DEC_CMD_START)
 646                 pr_info("speed=%d, format=%u\n",
 647                                 p->start.speed, p->start.format);
 648         else if (p->cmd == V4L2_DEC_CMD_STOP)
 649                 pr_info("pts=%llu\n", p->stop.pts);
 650 }
 651
 652 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 653 {
 654         const struct v4l2_dbg_chip_info *p = arg;
 655
 656         pr_cont("type=%u, ", p->match.type);
 657         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 658                 pr_cont("name=%.*s, ",
 659                                 (int)sizeof(p->match.name), p->match.name);
 660         else
 661                 pr_cont("addr=%u, ", p->match.addr);
 662         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 663 }
 664
 665 static void v4l_print_dbg_register(const void *arg, bool write_only)
 666 {
 667         const struct v4l2_dbg_register *p = arg;
 668
 669         pr_cont("type=%u, ", p->match.type);
 670         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 671                 pr_cont("name=%.*s, ",
 672                                 (int)sizeof(p->match.name), p->match.name);
 673         else
 674                 pr_cont("addr=%u, ", p->match.addr);
 675         pr_cont("reg=0x%llx, val=0x%llx\n",
 676                         p->reg, p->val);
 677 }
 678
 679 static void v4l_print_dv_timings(const void *arg, bool write_only)
 680 {
 681         const struct v4l2_dv_timings *p = arg;
 682
 683         switch (p->type) {
 684         case V4L2_DV_BT_656_1120:
 685                 pr_cont("type=bt-656/1120, interlaced=%u, "
 686                         "pixelclock=%llu, "
 687                         "width=%u, height=%u, polarities=0x%x, "
 688                         "hfrontporch=%u, hsync=%u, "
 689                         "hbackporch=%u, vfrontporch=%u, "
 690                         "vsync=%u, vbackporch=%u, "
 691                         "il_vfrontporch=%u, il_vsync=%u, "
 692                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 693                                 p->bt.interlaced, p->bt.pixelclock,
 694                                 p->bt.width, p->bt.height,
 695                                 p->bt.polarities, p->bt.hfrontporch,
 696                                 p->bt.hsync, p->bt.hbackporch,
 697                                 p->bt.vfrontporch, p->bt.vsync,
 698                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 699                                 p->bt.il_vsync, p->bt.il_vbackporch,
 700                                 p->bt.standards, p->bt.flags);
 701                 break;
 702         default:
 703                 pr_cont("type=%d\n", p->type);
 704                 break;
 705         }
 706 }
 707
 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_enum_dv_timings *p = arg;
 711
 712         pr_cont("index=%u, ", p->index);
 713         v4l_print_dv_timings(&p->timings, write_only);
 714 }
 715
 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 717 {
 718         const struct v4l2_dv_timings_cap *p = arg;
 719
 720         switch (p->type) {
 721         case V4L2_DV_BT_656_1120:
 722                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 723                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 724                         p->bt.min_width, p->bt.max_width,
 725                         p->bt.min_height, p->bt.max_height,
 726                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 727                         p->bt.standards, p->bt.capabilities);
 728                 break;
 729         default:
 730                 pr_cont("type=%u\n", p->type);
 731                 break;
 732         }
 733 }
 734
 735 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 736 {
 737         const struct v4l2_frmsizeenum *p = arg;
 738
 739         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 740                         p->index,
 741                         (p->pixel_format & 0xff),
 742                         (p->pixel_format >>  8) & 0xff,
 743                         (p->pixel_format >> 16) & 0xff,
 744                         (p->pixel_format >> 24) & 0xff,
 745                         p->type);
 746         switch (p->type) {
 747         case V4L2_FRMSIZE_TYPE_DISCRETE:
 748                 pr_cont(", wxh=%ux%u\n",
 749                         p->discrete.width, p->discrete.height);
 750                 break;
 751         case V4L2_FRMSIZE_TYPE_STEPWISE:
 752                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 753                                 p->stepwise.min_width,  p->stepwise.min_height,
 754                                 p->stepwise.step_width, p->stepwise.step_height,
 755                                 p->stepwise.max_width,  p->stepwise.max_height);
 756                 break;
 757         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 758                 /* fall through */
 759         default:
 760                 pr_cont("\n");
 761                 break;
 762         }
 763 }
 764
 765 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 766 {
 767         const struct v4l2_frmivalenum *p = arg;
 768
 769         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 770                         p->index,
 771                         (p->pixel_format & 0xff),
 772                         (p->pixel_format >>  8) & 0xff,
 773                         (p->pixel_format >> 16) & 0xff,
 774                         (p->pixel_format >> 24) & 0xff,
 775                         p->width, p->height, p->type);
 776         switch (p->type) {
 777         case V4L2_FRMIVAL_TYPE_DISCRETE:
 778                 pr_cont(", fps=%d/%d\n",
 779                                 p->discrete.numerator,
 780                                 p->discrete.denominator);
 781                 break;
 782         case V4L2_FRMIVAL_TYPE_STEPWISE:
 783                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 784                                 p->stepwise.min.numerator,
 785                                 p->stepwise.min.denominator,
 786                                 p->stepwise.max.numerator,
 787                                 p->stepwise.max.denominator,
 788                                 p->stepwise.step.numerator,
 789                                 p->stepwise.step.denominator);
 790                 break;
 791         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 792                 /* fall through */
 793         default:
 794                 pr_cont("\n");
 795                 break;
 796         }
 797 }
 798
 799 static void v4l_print_event(const void *arg, bool write_only)
 800 {
 801         const struct v4l2_event *p = arg;
 802         const struct v4l2_event_ctrl *c;
 803
 804         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 805                 "timestamp=%lu.%9.9lu\n",
 806                         p->type, p->pending, p->sequence, p->id,
 807                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 808         switch (p->type) {
 809         case V4L2_EVENT_VSYNC:
 810                 printk(KERN_DEBUG "field=%s\n",
 811                         prt_names(p->u.vsync.field, v4l2_field_names));
 812                 break;
 813         case V4L2_EVENT_CTRL:
 814                 c = &p->u.ctrl;
 815                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 816                         c->changes, c->type);
 817                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 818                         pr_cont("value64=%lld, ", c->value64);
 819                 else
 820                         pr_cont("value=%d, ", c->value);
 821                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 822                         "default_value=%d\n",
 823                         c->flags, c->minimum, c->maximum,
 824                         c->step, c->default_value);
 825                 break;
 826         case V4L2_EVENT_FRAME_SYNC:
 827                 pr_cont("frame_sequence=%u\n",
 828                         p->u.frame_sync.frame_sequence);
 829                 break;
 830         }
 831 }
 832
 833 static void v4l_print_event_subscription(const void *arg, bool write_only)
 834 {
 835         const struct v4l2_event_subscription *p = arg;
 836
 837         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 838                         p->type, p->id, p->flags);
 839 }
 840
 841 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 842 {
 843         const struct v4l2_sliced_vbi_cap *p = arg;
 844         int i;
 845
 846         pr_cont("type=%s, service_set=0x%08x\n",
 847                         prt_names(p->type, v4l2_type_names), p->service_set);
 848         for (i = 0; i < 24; i++)
 849                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 850                                 p->service_lines[0][i],
 851                                 p->service_lines[1][i]);
 852 }
 853
 854 static void v4l_print_freq_band(const void *arg, bool write_only)
 855 {
 856         const struct v4l2_frequency_band *p = arg;
 857
 858         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 859                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 860                         p->tuner, p->type, p->index,
 861                         p->capability, p->rangelow,
 862                         p->rangehigh, p->modulation);
 863 }
 864
 865 static void v4l_print_edid(const void *arg, bool write_only)
 866 {
 867         const struct v4l2_edid *p = arg;
 868
 869         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 870                 p->pad, p->start_block, p->blocks);
 871 }
 872
 873 static void v4l_print_u32(const void *arg, bool write_only)
 874 {
 875         pr_cont("value=%u\n", *(const u32 *)arg);
 876 }
 877
 878 static void v4l_print_newline(const void *arg, bool write_only)
 879 {
 880         pr_cont("\n");
 881 }
 882
 883 static void v4l_print_default(const void *arg, bool write_only)
 884 {
 885         pr_cont("driver-specific ioctl\n");
 886 }
 887
 888 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 889 {
 890         __u32 i;
 891
 892         /* zero the reserved fields */
 893         c->reserved[0] = c->reserved[1] = 0;
 894         for (i = 0; i < c->count; i++)
 895                 c->controls[i].reserved2[0] = 0;
 896
 897         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 898            when using extended controls.
 899            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 900            is it allowed for backwards compatibility.
 901          */
 902         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 903                 return 0;
 904         if (c->ctrl_class == 0)
 905                 return 1;
 906         /* Check that all controls are from the same control class. */
 907         for (i = 0; i < c->count; i++) {
 908                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 909                         c->error_idx = i;
 910                         return 0;
 911                 }
 912         }
 913         return 1;
 914 }
 915
 916 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 917 {
 918         struct video_device *vfd = video_devdata(file);
 919         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 920         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 921         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 922         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 923         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 924         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 925
 926         if (ops == NULL)
 927                 return -EINVAL;
 928
 929         switch (type) {
 930         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 931                 if (is_vid && is_rx &&
 932                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 933                         return 0;
 934                 break;
 935         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 936                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 937                         return 0;
 938                 break;
 939         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 940                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 941                         return 0;
 942                 break;
 943         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 944                 if (is_vid && is_tx &&
 945                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 946                         return 0;
 947                 break;
 948         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 949                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 950                         return 0;
 951                 break;
 952         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 953                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 954                         return 0;
 955                 break;
 956         case V4L2_BUF_TYPE_VBI_CAPTURE:
 957                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 958                         return 0;
 959                 break;
 960         case V4L2_BUF_TYPE_VBI_OUTPUT:
 961                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 962                         return 0;
 963                 break;
 964         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 965                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 969                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_SDR_CAPTURE:
 973                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 974                         return 0;
 975                 break;
 976         default:
 977                 break;
 978         }
 979         return -EINVAL;
 980 }
 981
 982 static void v4l_sanitize_format(struct v4l2_format *fmt)
 983 {
 984         unsigned int offset;
 985
 986         /*
 987          * The v4l2_pix_format structure has been extended with fields that were
 988          * not previously required to be set to zero by applications. The priv
 989          * field, when set to a magic value, indicates the the extended fields
 990          * are valid. Otherwise they will contain undefined values. To simplify
 991          * the API towards drivers zero the extended fields and set the priv
 992          * field to the magic value when the extended pixel format structure
 993          * isn't used by applications.
 994          */
 995
 996         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 997             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 998                 return;
 999
1000         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1001                 return;
1002
1003         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1004
1005         offset = offsetof(struct v4l2_pix_format, priv)
1006                + sizeof(fmt->fmt.pix.priv);
1007         memset(((void *)&fmt->fmt.pix) + offset, 0,
1008                sizeof(fmt->fmt.pix) - offset);
1009 }
1010
1011 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1012                                 struct file *file, void *fh, void *arg)
1013 {
1014         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1015         int ret;
1016
1017         cap->version = LINUX_VERSION_CODE;
1018
1019         ret = ops->vidioc_querycap(file, fh, cap);
1020
1021         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1022         /*
1023          * Drivers MUST fill in device_caps, so check for this and
1024          * warn if it was forgotten.
1025          */
1026         WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1027                 !cap->device_caps);
1028         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1029
1030         return ret;
1031 }
1032
1033 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1034                                 struct file *file, void *fh, void *arg)
1035 {
1036         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1037 }
1038
1039 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1040                                 struct file *file, void *fh, void *arg)
1041 {
1042         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1043 }
1044
1045 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1046                                 struct file *file, void *fh, void *arg)
1047 {
1048         struct video_device *vfd;
1049         u32 *p = arg;
1050
1051         vfd = video_devdata(file);
1052         *p = v4l2_prio_max(vfd->prio);
1053         return 0;
1054 }
1055
1056 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1057                                 struct file *file, void *fh, void *arg)
1058 {
1059         struct video_device *vfd;
1060         struct v4l2_fh *vfh;
1061         u32 *p = arg;
1062
1063         vfd = video_devdata(file);
1064         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1065                 return -ENOTTY;
1066         vfh = file->private_data;
1067         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1068 }
1069
1070 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1071                                 struct file *file, void *fh, void *arg)
1072 {
1073         struct video_device *vfd = video_devdata(file);
1074         struct v4l2_input *p = arg;
1075
1076         /*
1077          * We set the flags for CAP_DV_TIMINGS &
1078          * CAP_STD here based on ioctl handler provided by the
1079          * driver. If the driver doesn't support these
1080          * for a specific input, it must override these flags.
1081          */
1082         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1083                 p->capabilities |= V4L2_IN_CAP_STD;
1084
1085         return ops->vidioc_enum_input(file, fh, p);
1086 }
1087
1088 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1089                                 struct file *file, void *fh, void *arg)
1090 {
1091         struct video_device *vfd = video_devdata(file);
1092         struct v4l2_output *p = arg;
1093
1094         /*
1095          * We set the flags for CAP_DV_TIMINGS &
1096          * CAP_STD here based on ioctl handler provided by the
1097          * driver. If the driver doesn't support these
1098          * for a specific output, it must override these flags.
1099          */
1100         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1101                 p->capabilities |= V4L2_OUT_CAP_STD;
1102
1103         return ops->vidioc_enum_output(file, fh, p);
1104 }
1105
1106 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1107                                 struct file *file, void *fh, void *arg)
1108 {
1109         struct v4l2_fmtdesc *p = arg;
1110         struct video_device *vfd = video_devdata(file);
1111         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1112         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1113         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1114         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1115
1116         switch (p->type) {
1117         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1118                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1119                         break;
1120                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1121         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1122                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1123                         break;
1124                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1125         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1126                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1127                         break;
1128                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1129         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1130                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1131                         break;
1132                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1133         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1134                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1135                         break;
1136                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1137         case V4L2_BUF_TYPE_SDR_CAPTURE:
1138                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1139                         break;
1140                 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1141         }
1142         return -EINVAL;
1143 }
1144
1145 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1146                                 struct file *file, void *fh, void *arg)
1147 {
1148         struct v4l2_format *p = arg;
1149         struct video_device *vfd = video_devdata(file);
1150         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1151         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1152         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1153         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1154         int ret;
1155
1156         /*
1157          * fmt can't be cleared for these overlay types due to the 'clips'
1158          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1159          * Those are provided by the user. So handle these two overlay types
1160          * first, and then just do a simple memset for the other types.
1161          */
1162         switch (p->type) {
1163         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1164         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1165                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1166                 u32 clipcount = p->fmt.win.clipcount;
1167                 void __user *bitmap = p->fmt.win.bitmap;
1168
1169                 memset(&p->fmt, 0, sizeof(p->fmt));
1170                 p->fmt.win.clips = clips;
1171                 p->fmt.win.clipcount = clipcount;
1172                 p->fmt.win.bitmap = bitmap;
1173                 break;
1174         }
1175         default:
1176                 memset(&p->fmt, 0, sizeof(p->fmt));
1177                 break;
1178         }
1179
1180         switch (p->type) {
1181         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1182                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1183                         break;
1184                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1185                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1186                 /* just in case the driver zeroed it again */
1187                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1188                 return ret;
1189         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1190                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1191                         break;
1192                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1193         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1194                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1195                         break;
1196                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1197         case V4L2_BUF_TYPE_VBI_CAPTURE:
1198                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1199                         break;
1200                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1201         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1202                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1203                         break;
1204                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1205         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1206                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1207                         break;
1208                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1209                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1210                 /* just in case the driver zeroed it again */
1211                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1212                 return ret;
1213         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1214                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1215                         break;
1216                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1217         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1218                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1219                         break;
1220                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1221         case V4L2_BUF_TYPE_VBI_OUTPUT:
1222                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1223                         break;
1224                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1225         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1226                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1227                         break;
1228                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1229         case V4L2_BUF_TYPE_SDR_CAPTURE:
1230                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1231                         break;
1232                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1233         }
1234         return -EINVAL;
1235 }
1236
1237 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1238                                 struct file *file, void *fh, void *arg)
1239 {
1240         struct v4l2_format *p = arg;
1241         struct video_device *vfd = video_devdata(file);
1242         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1243         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1244         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1245         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1246         int ret;
1247
1248         v4l_sanitize_format(p);
1249
1250         switch (p->type) {
1251         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1252                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1253                         break;
1254                 CLEAR_AFTER_FIELD(p, fmt.pix);
1255                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1256                 /* just in case the driver zeroed it again */
1257                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1258                 return ret;
1259         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1260                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1261                         break;
1262                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1263                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1264         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1265                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1266                         break;
1267                 CLEAR_AFTER_FIELD(p, fmt.win);
1268                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1269         case V4L2_BUF_TYPE_VBI_CAPTURE:
1270                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1271                         break;
1272                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1273                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1274         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1275                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1276                         break;
1277                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1278                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1279         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1280                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1281                         break;
1282                 CLEAR_AFTER_FIELD(p, fmt.pix);
1283                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1284                 /* just in case the driver zeroed it again */
1285                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1286                 return ret;
1287         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1288                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1289                         break;
1290                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1291                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1292         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1293                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1294                         break;
1295                 CLEAR_AFTER_FIELD(p, fmt.win);
1296                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1297         case V4L2_BUF_TYPE_VBI_OUTPUT:
1298                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1299                         break;
1300                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1301                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1302         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1303                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1304                         break;
1305                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1306                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1307         case V4L2_BUF_TYPE_SDR_CAPTURE:
1308                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1309                         break;
1310                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1311                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1312         }
1313         return -EINVAL;
1314 }
1315
1316 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1317                                 struct file *file, void *fh, void *arg)
1318 {
1319         struct v4l2_format *p = arg;
1320         struct video_device *vfd = video_devdata(file);
1321         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1322         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1323         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1324         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1325         int ret;
1326
1327         v4l_sanitize_format(p);
1328
1329         switch (p->type) {
1330         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1331                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1332                         break;
1333                 CLEAR_AFTER_FIELD(p, fmt.pix);
1334                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1335                 /* just in case the driver zeroed it again */
1336                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1337                 return ret;
1338         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1339                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1340                         break;
1341                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1342                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1343         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1344                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1345                         break;
1346                 CLEAR_AFTER_FIELD(p, fmt.win);
1347                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1348         case V4L2_BUF_TYPE_VBI_CAPTURE:
1349                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1350                         break;
1351                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1352                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1353         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1354                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1355                         break;
1356                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1357                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1358         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1359                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1360                         break;
1361                 CLEAR_AFTER_FIELD(p, fmt.pix);
1362                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1363                 /* just in case the driver zeroed it again */
1364                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1365                 return ret;
1366         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1367                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1368                         break;
1369                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1370                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1371         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1372                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1373                         break;
1374                 CLEAR_AFTER_FIELD(p, fmt.win);
1375                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1376         case V4L2_BUF_TYPE_VBI_OUTPUT:
1377                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1378                         break;
1379                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1380                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1381         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1382                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1383                         break;
1384                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1385                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1386         case V4L2_BUF_TYPE_SDR_CAPTURE:
1387                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1388                         break;
1389                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1390                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1391         }
1392         return -EINVAL;
1393 }
1394
1395 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1396                                 struct file *file, void *fh, void *arg)
1397 {
1398         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1399 }
1400
1401 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1402                                 struct file *file, void *fh, void *arg)
1403 {
1404         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1405 }
1406
1407 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1408                                 struct file *file, void *fh, void *arg)
1409 {
1410         struct video_device *vfd = video_devdata(file);
1411         struct v4l2_tuner *p = arg;
1412         int err;
1413
1414         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1415                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1416         err = ops->vidioc_g_tuner(file, fh, p);
1417         if (!err)
1418                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1419         return err;
1420 }
1421
1422 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1423                                 struct file *file, void *fh, void *arg)
1424 {
1425         struct video_device *vfd = video_devdata(file);
1426         struct v4l2_tuner *p = arg;
1427
1428         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1429                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1430         return ops->vidioc_s_tuner(file, fh, p);
1431 }
1432
1433 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1434                                 struct file *file, void *fh, void *arg)
1435 {
1436         struct v4l2_modulator *p = arg;
1437         int err;
1438
1439         err = ops->vidioc_g_modulator(file, fh, p);
1440         if (!err)
1441                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1442         return err;
1443 }
1444
1445 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1446                                 struct file *file, void *fh, void *arg)
1447 {
1448         struct video_device *vfd = video_devdata(file);
1449         struct v4l2_frequency *p = arg;
1450
1451         if (vfd->vfl_type == VFL_TYPE_SDR)
1452                 p->type = V4L2_TUNER_ADC;
1453         else
1454                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1455                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1456         return ops->vidioc_g_frequency(file, fh, p);
1457 }
1458
1459 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1460                                 struct file *file, void *fh, void *arg)
1461 {
1462         struct video_device *vfd = video_devdata(file);
1463         const struct v4l2_frequency *p = arg;
1464         enum v4l2_tuner_type type;
1465
1466         if (vfd->vfl_type == VFL_TYPE_SDR) {
1467                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1468                         return -EINVAL;
1469         } else {
1470                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1471                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1472                 if (type != p->type)
1473                         return -EINVAL;
1474         }
1475         return ops->vidioc_s_frequency(file, fh, p);
1476 }
1477
1478 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1479                                 struct file *file, void *fh, void *arg)
1480 {
1481         struct video_device *vfd = video_devdata(file);
1482         struct v4l2_standard *p = arg;
1483         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1484         unsigned int index = p->index, i, j = 0;
1485         const char *descr = "";
1486
1487         /* Return -ENODATA if the tvnorms for the current input
1488            or output is 0, meaning that it doesn't support this API. */
1489         if (id == 0)
1490                 return -ENODATA;
1491
1492         /* Return norm array in a canonical way */
1493         for (i = 0; i <= index && id; i++) {
1494                 /* last std value in the standards array is 0, so this
1495                    while always ends there since (id & 0) == 0. */
1496                 while ((id & standards[j].std) != standards[j].std)
1497                         j++;
1498                 curr_id = standards[j].std;
1499                 descr = standards[j].descr;
1500                 j++;
1501                 if (curr_id == 0)
1502                         break;
1503                 if (curr_id != V4L2_STD_PAL &&
1504                                 curr_id != V4L2_STD_SECAM &&
1505                                 curr_id != V4L2_STD_NTSC)
1506                         id &= ~curr_id;
1507         }
1508         if (i <= index)
1509                 return -EINVAL;
1510
1511         v4l2_video_std_construct(p, curr_id, descr);
1512         return 0;
1513 }
1514
1515 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1516                                 struct file *file, void *fh, void *arg)
1517 {
1518         struct video_device *vfd = video_devdata(file);
1519         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1520
1521         norm = id & vfd->tvnorms;
1522         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1523                 return -EINVAL;
1524
1525         /* Calls the specific handler */
1526         return ops->vidioc_s_std(file, fh, norm);
1527 }
1528
1529 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1530                                 struct file *file, void *fh, void *arg)
1531 {
1532         struct video_device *vfd = video_devdata(file);
1533         v4l2_std_id *p = arg;
1534
1535         /*
1536          * If no signal is detected, then the driver should return
1537          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1538          * any standards that do not apply removed.
1539          *
1540          * This means that tuners, audio and video decoders can join
1541          * their efforts to improve the standards detection.
1542          */
1543         *p = vfd->tvnorms;
1544         return ops->vidioc_querystd(file, fh, arg);
1545 }
1546
1547 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1548                                 struct file *file, void *fh, void *arg)
1549 {
1550         struct video_device *vfd = video_devdata(file);
1551         struct v4l2_hw_freq_seek *p = arg;
1552         enum v4l2_tuner_type type;
1553
1554         /* s_hw_freq_seek is not supported for SDR for now */
1555         if (vfd->vfl_type == VFL_TYPE_SDR)
1556                 return -EINVAL;
1557
1558         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1559                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1560         if (p->type != type)
1561                 return -EINVAL;
1562         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1563 }
1564
1565 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1566                                 struct file *file, void *fh, void *arg)
1567 {
1568         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1569 }
1570
1571 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1572                                 struct file *file, void *fh, void *arg)
1573 {
1574         struct v4l2_requestbuffers *p = arg;
1575         int ret = check_fmt(file, p->type);
1576
1577         if (ret)
1578                 return ret;
1579
1580         CLEAR_AFTER_FIELD(p, memory);
1581
1582         return ops->vidioc_reqbufs(file, fh, p);
1583 }
1584
1585 static int v4l_querybuf(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_querybuf(file, fh, p);
1592 }
1593
1594 static int v4l_qbuf(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_qbuf(file, fh, p);
1601 }
1602
1603 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1604                                 struct file *file, void *fh, void *arg)
1605 {
1606         struct v4l2_buffer *p = arg;
1607         int ret = check_fmt(file, p->type);
1608
1609         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1610 }
1611
1612 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1613                                 struct file *file, void *fh, void *arg)
1614 {
1615         struct v4l2_create_buffers *create = arg;
1616         int ret = check_fmt(file, create->format.type);
1617
1618         if (ret)
1619                 return ret;
1620
1621         v4l_sanitize_format(&create->format);
1622
1623         ret = ops->vidioc_create_bufs(file, fh, create);
1624
1625         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1626             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1627                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1628
1629         return ret;
1630 }
1631
1632 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1633                                 struct file *file, void *fh, void *arg)
1634 {
1635         struct v4l2_buffer *b = arg;
1636         int ret = check_fmt(file, b->type);
1637
1638         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1639 }
1640
1641 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1642                                 struct file *file, void *fh, void *arg)
1643 {
1644         struct v4l2_streamparm *p = arg;
1645         v4l2_std_id std;
1646         int ret = check_fmt(file, p->type);
1647
1648         if (ret)
1649                 return ret;
1650         if (ops->vidioc_g_parm)
1651                 return ops->vidioc_g_parm(file, fh, p);
1652         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1653             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1654                 return -EINVAL;
1655         p->parm.capture.readbuffers = 2;
1656         ret = ops->vidioc_g_std(file, fh, &std);
1657         if (ret == 0)
1658                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1659         return ret;
1660 }
1661
1662 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1663                                 struct file *file, void *fh, void *arg)
1664 {
1665         struct v4l2_streamparm *p = arg;
1666         int ret = check_fmt(file, p->type);
1667
1668         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1669 }
1670
1671 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1672                                 struct file *file, void *fh, void *arg)
1673 {
1674         struct video_device *vfd = video_devdata(file);
1675         struct v4l2_queryctrl *p = arg;
1676         struct v4l2_fh *vfh =
1677                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1678
1679         if (vfh && vfh->ctrl_handler)
1680                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1681         if (vfd->ctrl_handler)
1682                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1683         if (ops->vidioc_queryctrl)
1684                 return ops->vidioc_queryctrl(file, fh, p);
1685         return -ENOTTY;
1686 }
1687
1688 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1689                                 struct file *file, void *fh, void *arg)
1690 {
1691         struct video_device *vfd = video_devdata(file);
1692         struct v4l2_query_ext_ctrl *p = arg;
1693         struct v4l2_fh *vfh =
1694                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1695
1696         if (vfh && vfh->ctrl_handler)
1697                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1698         if (vfd->ctrl_handler)
1699                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1700         if (ops->vidioc_query_ext_ctrl)
1701                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1702         return -ENOTTY;
1703 }
1704
1705 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1706                                 struct file *file, void *fh, void *arg)
1707 {
1708         struct video_device *vfd = video_devdata(file);
1709         struct v4l2_querymenu *p = arg;
1710         struct v4l2_fh *vfh =
1711                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1712
1713         if (vfh && vfh->ctrl_handler)
1714                 return v4l2_querymenu(vfh->ctrl_handler, p);
1715         if (vfd->ctrl_handler)
1716                 return v4l2_querymenu(vfd->ctrl_handler, p);
1717         if (ops->vidioc_querymenu)
1718                 return ops->vidioc_querymenu(file, fh, p);
1719         return -ENOTTY;
1720 }
1721
1722 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1723                                 struct file *file, void *fh, void *arg)
1724 {
1725         struct video_device *vfd = video_devdata(file);
1726         struct v4l2_control *p = arg;
1727         struct v4l2_fh *vfh =
1728                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1729         struct v4l2_ext_controls ctrls;
1730         struct v4l2_ext_control ctrl;
1731
1732         if (vfh && vfh->ctrl_handler)
1733                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1734         if (vfd->ctrl_handler)
1735                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1736         if (ops->vidioc_g_ctrl)
1737                 return ops->vidioc_g_ctrl(file, fh, p);
1738         if (ops->vidioc_g_ext_ctrls == NULL)
1739                 return -ENOTTY;
1740
1741         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1742         ctrls.count = 1;
1743         ctrls.controls = &ctrl;
1744         ctrl.id = p->id;
1745         ctrl.value = p->value;
1746         if (check_ext_ctrls(&ctrls, 1)) {
1747                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1748
1749                 if (ret == 0)
1750                         p->value = ctrl.value;
1751                 return ret;
1752         }
1753         return -EINVAL;
1754 }
1755
1756 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1757                                 struct file *file, void *fh, void *arg)
1758 {
1759         struct video_device *vfd = video_devdata(file);
1760         struct v4l2_control *p = arg;
1761         struct v4l2_fh *vfh =
1762                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1763         struct v4l2_ext_controls ctrls;
1764         struct v4l2_ext_control ctrl;
1765
1766         if (vfh && vfh->ctrl_handler)
1767                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1768         if (vfd->ctrl_handler)
1769                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1770         if (ops->vidioc_s_ctrl)
1771                 return ops->vidioc_s_ctrl(file, fh, p);
1772         if (ops->vidioc_s_ext_ctrls == NULL)
1773                 return -ENOTTY;
1774
1775         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1776         ctrls.count = 1;
1777         ctrls.controls = &ctrl;
1778         ctrl.id = p->id;
1779         ctrl.value = p->value;
1780         if (check_ext_ctrls(&ctrls, 1))
1781                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1782         return -EINVAL;
1783 }
1784
1785 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1786                                 struct file *file, void *fh, void *arg)
1787 {
1788         struct video_device *vfd = video_devdata(file);
1789         struct v4l2_ext_controls *p = arg;
1790         struct v4l2_fh *vfh =
1791                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1792
1793         p->error_idx = p->count;
1794         if (vfh && vfh->ctrl_handler)
1795                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1796         if (vfd->ctrl_handler)
1797                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1798         if (ops->vidioc_g_ext_ctrls == NULL)
1799                 return -ENOTTY;
1800         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1801                                         -EINVAL;
1802 }
1803
1804 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1805                                 struct file *file, void *fh, void *arg)
1806 {
1807         struct video_device *vfd = video_devdata(file);
1808         struct v4l2_ext_controls *p = arg;
1809         struct v4l2_fh *vfh =
1810                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1811
1812         p->error_idx = p->count;
1813         if (vfh && vfh->ctrl_handler)
1814                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1815         if (vfd->ctrl_handler)
1816                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1817         if (ops->vidioc_s_ext_ctrls == NULL)
1818                 return -ENOTTY;
1819         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1820                                         -EINVAL;
1821 }
1822
1823 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1824                                 struct file *file, void *fh, void *arg)
1825 {
1826         struct video_device *vfd = video_devdata(file);
1827         struct v4l2_ext_controls *p = arg;
1828         struct v4l2_fh *vfh =
1829                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1830
1831         p->error_idx = p->count;
1832         if (vfh && vfh->ctrl_handler)
1833                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1834         if (vfd->ctrl_handler)
1835                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1836         if (ops->vidioc_try_ext_ctrls == NULL)
1837                 return -ENOTTY;
1838         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1839                                         -EINVAL;
1840 }
1841
1842 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1843                                 struct file *file, void *fh, void *arg)
1844 {
1845         struct v4l2_crop *p = arg;
1846         struct v4l2_selection s = {
1847                 .type = p->type,
1848         };
1849         int ret;
1850
1851         if (ops->vidioc_g_crop)
1852                 return ops->vidioc_g_crop(file, fh, p);
1853         /* simulate capture crop using selection api */
1854
1855         /* crop means compose for output devices */
1856         if (V4L2_TYPE_IS_OUTPUT(p->type))
1857                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1858         else
1859                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1860
1861         ret = ops->vidioc_g_selection(file, fh, &s);
1862
1863         /* copying results to old structure on success */
1864         if (!ret)
1865                 p->c = s.r;
1866         return ret;
1867 }
1868
1869 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1870                                 struct file *file, void *fh, void *arg)
1871 {
1872         struct v4l2_crop *p = arg;
1873         struct v4l2_selection s = {
1874                 .type = p->type,
1875                 .r = p->c,
1876         };
1877
1878         if (ops->vidioc_s_crop)
1879                 return ops->vidioc_s_crop(file, fh, p);
1880         /* simulate capture crop using selection api */
1881
1882         /* crop means compose for output devices */
1883         if (V4L2_TYPE_IS_OUTPUT(p->type))
1884                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1885         else
1886                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1887
1888         return ops->vidioc_s_selection(file, fh, &s);
1889 }
1890
1891 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1892                                 struct file *file, void *fh, void *arg)
1893 {
1894         struct v4l2_cropcap *p = arg;
1895
1896         if (ops->vidioc_g_selection) {
1897                 struct v4l2_selection s = { .type = p->type };
1898                 int ret;
1899
1900                 /* obtaining bounds */
1901                 if (V4L2_TYPE_IS_OUTPUT(p->type))
1902                         s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1903                 else
1904                         s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1905
1906                 ret = ops->vidioc_g_selection(file, fh, &s);
1907                 if (ret)
1908                         return ret;
1909                 p->bounds = s.r;
1910
1911                 /* obtaining defrect */
1912                 if (V4L2_TYPE_IS_OUTPUT(p->type))
1913                         s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1914                 else
1915                         s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1916
1917                 ret = ops->vidioc_g_selection(file, fh, &s);
1918                 if (ret)
1919                         return ret;
1920                 p->defrect = s.r;
1921         }
1922
1923         /* setting trivial pixelaspect */
1924         p->pixelaspect.numerator = 1;
1925         p->pixelaspect.denominator = 1;
1926
1927         if (ops->vidioc_cropcap)
1928                 return ops->vidioc_cropcap(file, fh, p);
1929
1930         return 0;
1931 }
1932
1933 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1934                                 struct file *file, void *fh, void *arg)
1935 {
1936         struct video_device *vfd = video_devdata(file);
1937         int ret;
1938
1939         if (vfd->v4l2_dev)
1940                 pr_info("%s: =================  START STATUS  =================\n",
1941                         vfd->v4l2_dev->name);
1942         ret = ops->vidioc_log_status(file, fh);
1943         if (vfd->v4l2_dev)
1944                 pr_info("%s: ==================  END STATUS  ==================\n",
1945                         vfd->v4l2_dev->name);
1946         return ret;
1947 }
1948
1949 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1950                                 struct file *file, void *fh, void *arg)
1951 {
1952 #ifdef CONFIG_VIDEO_ADV_DEBUG
1953         struct v4l2_dbg_register *p = arg;
1954         struct video_device *vfd = video_devdata(file);
1955         struct v4l2_subdev *sd;
1956         int idx = 0;
1957
1958         if (!capable(CAP_SYS_ADMIN))
1959                 return -EPERM;
1960         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1961                 if (vfd->v4l2_dev == NULL)
1962                         return -EINVAL;
1963                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1964                         if (p->match.addr == idx++)
1965                                 return v4l2_subdev_call(sd, core, g_register, p);
1966                 return -EINVAL;
1967         }
1968         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1969             (ops->vidioc_g_chip_info || p->match.addr == 0))
1970                 return ops->vidioc_g_register(file, fh, p);
1971         return -EINVAL;
1972 #else
1973         return -ENOTTY;
1974 #endif
1975 }
1976
1977 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1978                                 struct file *file, void *fh, void *arg)
1979 {
1980 #ifdef CONFIG_VIDEO_ADV_DEBUG
1981         const struct v4l2_dbg_register *p = arg;
1982         struct video_device *vfd = video_devdata(file);
1983         struct v4l2_subdev *sd;
1984         int idx = 0;
1985
1986         if (!capable(CAP_SYS_ADMIN))
1987                 return -EPERM;
1988         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1989                 if (vfd->v4l2_dev == NULL)
1990                         return -EINVAL;
1991                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1992                         if (p->match.addr == idx++)
1993                                 return v4l2_subdev_call(sd, core, s_register, p);
1994                 return -EINVAL;
1995         }
1996         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1997             (ops->vidioc_g_chip_info || p->match.addr == 0))
1998                 return ops->vidioc_s_register(file, fh, p);
1999         return -EINVAL;
2000 #else
2001         return -ENOTTY;
2002 #endif
2003 }
2004
2005 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008 #ifdef CONFIG_VIDEO_ADV_DEBUG
2009         struct video_device *vfd = video_devdata(file);
2010         struct v4l2_dbg_chip_info *p = arg;
2011         struct v4l2_subdev *sd;
2012         int idx = 0;
2013
2014         switch (p->match.type) {
2015         case V4L2_CHIP_MATCH_BRIDGE:
2016                 if (ops->vidioc_s_register)
2017                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2018                 if (ops->vidioc_g_register)
2019                         p->flags |= V4L2_CHIP_FL_READABLE;
2020                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2021                 if (ops->vidioc_g_chip_info)
2022                         return ops->vidioc_g_chip_info(file, fh, arg);
2023                 if (p->match.addr)
2024                         return -EINVAL;
2025                 return 0;
2026
2027         case V4L2_CHIP_MATCH_SUBDEV:
2028                 if (vfd->v4l2_dev == NULL)
2029                         break;
2030                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2031                         if (p->match.addr != idx++)
2032                                 continue;
2033                         if (sd->ops->core && sd->ops->core->s_register)
2034                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2035                         if (sd->ops->core && sd->ops->core->g_register)
2036                                 p->flags |= V4L2_CHIP_FL_READABLE;
2037                         strlcpy(p->name, sd->name, sizeof(p->name));
2038                         return 0;
2039                 }
2040                 break;
2041         }
2042         return -EINVAL;
2043 #else
2044         return -ENOTTY;
2045 #endif
2046 }
2047
2048 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2049                                 struct file *file, void *fh, void *arg)
2050 {
2051         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2052 }
2053
2054 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2055                                 struct file *file, void *fh, void *arg)
2056 {
2057         return ops->vidioc_subscribe_event(fh, arg);
2058 }
2059
2060 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2061                                 struct file *file, void *fh, void *arg)
2062 {
2063         return ops->vidioc_unsubscribe_event(fh, arg);
2064 }
2065
2066 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2067                                 struct file *file, void *fh, void *arg)
2068 {
2069         struct v4l2_sliced_vbi_cap *p = arg;
2070         int ret = check_fmt(file, p->type);
2071
2072         if (ret)
2073                 return ret;
2074
2075         /* Clear up to type, everything after type is zeroed already */
2076         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2077
2078         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2079 }
2080
2081 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2082                                 struct file *file, void *fh, void *arg)
2083 {
2084         struct video_device *vfd = video_devdata(file);
2085         struct v4l2_frequency_band *p = arg;
2086         enum v4l2_tuner_type type;
2087         int err;
2088
2089         if (vfd->vfl_type == VFL_TYPE_SDR) {
2090                 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
2091                         return -EINVAL;
2092                 type = p->type;
2093         } else {
2094                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2095                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2096                 if (type != p->type)
2097                         return -EINVAL;
2098         }
2099         if (ops->vidioc_enum_freq_bands) {
2100                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2101                 if (err != -ENOTTY)
2102                         return err;
2103         }
2104         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2105                 struct v4l2_tuner t = {
2106                         .index = p->tuner,
2107                         .type = type,
2108                 };
2109
2110                 if (p->index)
2111                         return -EINVAL;
2112                 err = ops->vidioc_g_tuner(file, fh, &t);
2113                 if (err)
2114                         return err;
2115                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2116                 p->rangelow = t.rangelow;
2117                 p->rangehigh = t.rangehigh;
2118                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2119                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2120                 return 0;
2121         }
2122         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2123                 struct v4l2_modulator m = {
2124                         .index = p->tuner,
2125                 };
2126
2127                 if (type != V4L2_TUNER_RADIO)
2128                         return -EINVAL;
2129                 if (p->index)
2130                         return -EINVAL;
2131                 err = ops->vidioc_g_modulator(file, fh, &m);
2132                 if (err)
2133                         return err;
2134                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2135                 p->rangelow = m.rangelow;
2136                 p->rangehigh = m.rangehigh;
2137                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2138                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2139                 return 0;
2140         }
2141         return -ENOTTY;
2142 }
2143
2144 struct v4l2_ioctl_info {
2145         unsigned int ioctl;
2146         u32 flags;
2147         const char * const name;
2148         union {
2149                 u32 offset;
2150                 int (*func)(const struct v4l2_ioctl_ops *ops,
2151                                 struct file *file, void *fh, void *p);
2152         } u;
2153         void (*debug)(const void *arg, bool write_only);
2154 };
2155
2156 /* This control needs a priority check */
2157 #define INFO_FL_PRIO    (1 << 0)
2158 /* This control can be valid if the filehandle passes a control handler. */
2159 #define INFO_FL_CTRL    (1 << 1)
2160 /* This is a standard ioctl, no need for special code */
2161 #define INFO_FL_STD     (1 << 2)
2162 /* This is ioctl has its own function */
2163 #define INFO_FL_FUNC    (1 << 3)
2164 /* Queuing ioctl */
2165 #define INFO_FL_QUEUE   (1 << 4)
2166 /* Zero struct from after the field to the end */
2167 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2168         ((offsetof(struct v4l2_struct, field) +                 \
2169           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2170 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2171
2172 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2173         [_IOC_NR(_ioctl)] = {                                           \
2174                 .ioctl = _ioctl,                                        \
2175                 .flags = _flags | INFO_FL_STD,                          \
2176                 .name = #_ioctl,                                        \
2177                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2178                 .debug = _debug,                                        \
2179         }
2180
2181 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2182         [_IOC_NR(_ioctl)] = {                                           \
2183                 .ioctl = _ioctl,                                        \
2184                 .flags = _flags | INFO_FL_FUNC,                         \
2185                 .name = #_ioctl,                                        \
2186                 .u.func = _func,                                        \
2187                 .debug = _debug,                                        \
2188         }
2189
2190 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2191         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2192         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2193         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2194         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2195         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2196         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2197         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2198         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2199         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2200         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2201         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2202         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2203         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2204         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2205         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2206         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2207         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2208         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2209         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2210         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2211         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2212         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2213         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2214         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2215         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2216         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2217         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2218         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2219         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2220         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2221         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2222         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2223         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2224         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2225         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2226         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2227         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2228         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2229         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2230         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2231         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2232         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2233         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2234         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2235         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2236         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2237         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2238         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2239         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2240         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2241         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2242         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2243         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2244         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2245         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)),
2246         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2247         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2248         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2249         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2250         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2251         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2252         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2253         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2254         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2255         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2256         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2257         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2258         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2259         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2260         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2261         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2262         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2263         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2264         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2265         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2266         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2267         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2268         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2269         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2270         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2271         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)),
2272         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)),
2273 };
2274 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2275
2276 bool v4l2_is_known_ioctl(unsigned int cmd)
2277 {
2278         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2279                 return false;
2280         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2281 }
2282
2283 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2284 {
2285         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2286                 return vdev->lock;
2287         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2288                 return NULL;
2289         if (vdev->queue && vdev->queue->lock &&
2290                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2291                 return vdev->queue->lock;
2292         return vdev->lock;
2293 }
2294
2295 /* Common ioctl debug function. This function can be used by
2296    external ioctl messages as well as internal V4L ioctl */
2297 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2298 {
2299         const char *dir, *type;
2300
2301         if (prefix)
2302                 printk(KERN_DEBUG "%s: ", prefix);
2303
2304         switch (_IOC_TYPE(cmd)) {
2305         case 'd':
2306                 type = "v4l2_int";
2307                 break;
2308         case 'V':
2309                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2310                         type = "v4l2";
2311                         break;
2312                 }
2313                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2314                 return;
2315         default:
2316                 type = "unknown";
2317                 break;
2318         }
2319
2320         switch (_IOC_DIR(cmd)) {
2321         case _IOC_NONE:              dir = "--"; break;
2322         case _IOC_READ:              dir = "r-"; break;
2323         case _IOC_WRITE:             dir = "-w"; break;
2324         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2325         default:                     dir = "*ERR*"; break;
2326         }
2327         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2328                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2329 }
2330 EXPORT_SYMBOL(v4l_printk_ioctl);
2331
2332 static long __video_do_ioctl(struct file *file,
2333                 unsigned int cmd, void *arg)
2334 {
2335         struct video_device *vfd = video_devdata(file);
2336         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2337         bool write_only = false;
2338         struct v4l2_ioctl_info default_info;
2339         const struct v4l2_ioctl_info *info;
2340         void *fh = file->private_data;
2341         struct v4l2_fh *vfh = NULL;
2342         int dev_debug = vfd->dev_debug;
2343         long ret = -ENOTTY;
2344
2345         if (ops == NULL) {
2346                 pr_warn("%s: has no ioctl_ops.\n",
2347                                 video_device_node_name(vfd));
2348                 return ret;
2349         }
2350
2351         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2352                 vfh = file->private_data;
2353
2354         if (v4l2_is_known_ioctl(cmd)) {
2355                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2356
2357                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2358                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2359                         goto done;
2360
2361                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2362                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2363                         if (ret)
2364                                 goto done;
2365                 }
2366         } else {
2367                 default_info.ioctl = cmd;
2368                 default_info.flags = 0;
2369                 default_info.debug = v4l_print_default;
2370                 info = &default_info;
2371         }
2372
2373         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2374         if (info->flags & INFO_FL_STD) {
2375                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2376                 const void *p = vfd->ioctl_ops;
2377                 const vidioc_op *vidioc = p + info->u.offset;
2378
2379                 ret = (*vidioc)(file, fh, arg);
2380         } else if (info->flags & INFO_FL_FUNC) {
2381                 ret = info->u.func(ops, file, fh, arg);
2382         } else if (!ops->vidioc_default) {
2383                 ret = -ENOTTY;
2384         } else {
2385                 ret = ops->vidioc_default(file, fh,
2386                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2387                         cmd, arg);
2388         }
2389
2390 done:
2391         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2392                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2393                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2394                         return ret;
2395
2396                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2397                 if (ret < 0)
2398                         pr_cont(": error %ld", ret);
2399                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2400                         pr_cont("\n");
2401                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2402                         info->debug(arg, write_only);
2403                 else {
2404                         pr_cont(": ");
2405                         info->debug(arg, write_only);
2406                 }
2407         }
2408
2409         return ret;
2410 }
2411
2412 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2413                             void __user **user_ptr, void ***kernel_ptr)
2414 {
2415         int ret = 0;
2416
2417         switch (cmd) {
2418         case VIDIOC_PREPARE_BUF:
2419         case VIDIOC_QUERYBUF:
2420         case VIDIOC_QBUF:
2421         case VIDIOC_DQBUF: {
2422                 struct v4l2_buffer *buf = parg;
2423
2424                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2425                         if (buf->length > VIDEO_MAX_PLANES) {
2426                                 ret = -EINVAL;
2427                                 break;
2428                         }
2429                         *user_ptr = (void __user *)buf->m.planes;
2430                         *kernel_ptr = (void **)&buf->m.planes;
2431                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2432                         ret = 1;
2433                 }
2434                 break;
2435         }
2436
2437         case VIDIOC_G_EDID:
2438         case VIDIOC_S_EDID: {
2439                 struct v4l2_edid *edid = parg;
2440
2441                 if (edid->blocks) {
2442                         if (edid->blocks > 256) {
2443                                 ret = -EINVAL;
2444                                 break;
2445                         }
2446                         *user_ptr = (void __user *)edid->edid;
2447                         *kernel_ptr = (void **)&edid->edid;
2448                         *array_size = edid->blocks * 128;
2449                         ret = 1;
2450                 }
2451                 break;
2452         }
2453
2454         case VIDIOC_S_EXT_CTRLS:
2455         case VIDIOC_G_EXT_CTRLS:
2456         case VIDIOC_TRY_EXT_CTRLS: {
2457                 struct v4l2_ext_controls *ctrls = parg;
2458
2459                 if (ctrls->count != 0) {
2460                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2461                                 ret = -EINVAL;
2462                                 break;
2463                         }
2464                         *user_ptr = (void __user *)ctrls->controls;
2465                         *kernel_ptr = (void **)&ctrls->controls;
2466                         *array_size = sizeof(struct v4l2_ext_control)
2467                                     * ctrls->count;
2468                         ret = 1;
2469                 }
2470                 break;
2471         }
2472         }
2473
2474         return ret;
2475 }
2476
2477 long
2478 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2479                v4l2_kioctl func)
2480 {
2481         char    sbuf[128];
2482         void    *mbuf = NULL;
2483         void    *parg = (void *)arg;
2484         long    err  = -EINVAL;
2485         bool    has_array_args;
2486         size_t  array_size = 0;
2487         void __user *user_ptr = NULL;
2488         void    **kernel_ptr = NULL;
2489
2490         /*  Copy arguments into temp kernel buffer  */
2491         if (_IOC_DIR(cmd) != _IOC_NONE) {
2492                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2493                         parg = sbuf;
2494                 } else {
2495                         /* too big to allocate from stack */
2496                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2497                         if (NULL == mbuf)
2498                                 return -ENOMEM;
2499                         parg = mbuf;
2500                 }
2501
2502                 err = -EFAULT;
2503                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2504                         unsigned int n = _IOC_SIZE(cmd);
2505
2506                         /*
2507                          * In some cases, only a few fields are used as input,
2508                          * i.e. when the app sets "index" and then the driver
2509                          * fills in the rest of the structure for the thing
2510                          * with that index.  We only need to copy up the first
2511                          * non-input field.
2512                          */
2513                         if (v4l2_is_known_ioctl(cmd)) {
2514                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2515                                 if (flags & INFO_FL_CLEAR_MASK)
2516                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2517                         }
2518
2519                         if (copy_from_user(parg, (void __user *)arg, n))
2520                                 goto out;
2521
2522                         /* zero out anything we don't copy from userspace */
2523                         if (n < _IOC_SIZE(cmd))
2524                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2525                 } else {
2526                         /* read-only ioctl */
2527                         memset(parg, 0, _IOC_SIZE(cmd));
2528                 }
2529         }
2530
2531         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2532         if (err < 0)
2533                 goto out;
2534         has_array_args = err;
2535
2536         if (has_array_args) {
2537                 /*
2538                  * When adding new types of array args, make sure that the
2539                  * parent argument to ioctl (which contains the pointer to the
2540                  * array) fits into sbuf (so that mbuf will still remain
2541                  * unused up to here).
2542                  */
2543                 mbuf = kmalloc(array_size, GFP_KERNEL);
2544                 err = -ENOMEM;
2545                 if (NULL == mbuf)
2546                         goto out_array_args;
2547                 err = -EFAULT;
2548                 if (copy_from_user(mbuf, user_ptr, array_size))
2549                         goto out_array_args;
2550                 *kernel_ptr = mbuf;
2551         }
2552
2553         /* Handles IOCTL */
2554         err = func(file, cmd, parg);
2555         if (err == -ENOIOCTLCMD)
2556                 err = -ENOTTY;
2557         if (err == 0) {
2558                 if (cmd == VIDIOC_DQBUF)
2559                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2560                 else if (cmd == VIDIOC_QBUF)
2561                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2562         }
2563
2564         if (has_array_args) {
2565                 *kernel_ptr = (void __force *)user_ptr;
2566                 if (copy_to_user(user_ptr, mbuf, array_size))
2567                         err = -EFAULT;
2568                 goto out_array_args;
2569         }
2570         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2571            results that must be returned. */
2572         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2573                 goto out;
2574
2575 out_array_args:
2576         /*  Copy results into user buffer  */
2577         switch (_IOC_DIR(cmd)) {
2578         case _IOC_READ:
2579         case (_IOC_WRITE | _IOC_READ):
2580                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2581                         err = -EFAULT;
2582                 break;
2583         }
2584
2585 out:
2586         kfree(mbuf);
2587         return err;
2588 }
2589 EXPORT_SYMBOL(video_usercopy);
2590
2591 long video_ioctl2(struct file *file,
2592                unsigned int cmd, unsigned long arg)
2593 {
2594         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2595 }
2596 EXPORT_SYMBOL(video_ioctl2);