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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Video capture interface for Linux version 2
   4  *
   5  * A generic framework to process V4L2 ioctl commands.
   6  *
   7  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
   8  *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9  */
  10
  11 #include <linux/mm.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/types.h>
  15 #include <linux/kernel.h>
  16 #include <linux/version.h>
  17
  18 #include <linux/videodev2.h>
  19
  20 #include <media/v4l2-common.h>
  21 #include <media/v4l2-ioctl.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-fh.h>
  24 #include <media/v4l2-event.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/videobuf2-v4l2.h>
  27 #include <media/v4l2-mc.h>
  28 #include <media/v4l2-mem2mem.h>
  29
  30 #include <trace/events/v4l2.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40 struct std_descr {
  41         v4l2_std_id std;
  42         const char *descr;
  43 };
  44
  45 static const struct std_descr standards[] = {
  46         { V4L2_STD_NTSC,        "NTSC"      },
  47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51         { V4L2_STD_PAL,         "PAL"       },
  52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53         { V4L2_STD_PAL_B,       "PAL-B"     },
  54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55         { V4L2_STD_PAL_G,       "PAL-G"     },
  56         { V4L2_STD_PAL_H,       "PAL-H"     },
  57         { V4L2_STD_PAL_I,       "PAL-I"     },
  58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59         { V4L2_STD_PAL_D,       "PAL-D"     },
  60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61         { V4L2_STD_PAL_K,       "PAL-K"     },
  62         { V4L2_STD_PAL_M,       "PAL-M"     },
  63         { V4L2_STD_PAL_N,       "PAL-N"     },
  64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65         { V4L2_STD_PAL_60,      "PAL-60"    },
  66         { V4L2_STD_SECAM,       "SECAM"     },
  67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76         { 0,                    "Unknown"   }
  77 };
  78
  79 /* video4linux standard ID conversion to standard name
  80  */
  81 const char *v4l2_norm_to_name(v4l2_std_id id)
  82 {
  83         u32 myid = id;
  84         int i;
  85
  86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87            64 bit comparisons. So, on that architecture, with some gcc
  88            variants, compilation fails. Currently, the max value is 30bit wide.
  89          */
  90         BUG_ON(myid != id);
  91
  92         for (i = 0; standards[i].std; i++)
  93                 if (myid == standards[i].std)
  94                         break;
  95         return standards[i].descr;
  96 }
  97 EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99 /* Returns frame period for the given standard */
 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101 {
 102         if (id & V4L2_STD_525_60) {
 103                 frameperiod->numerator = 1001;
 104                 frameperiod->denominator = 30000;
 105         } else {
 106                 frameperiod->numerator = 1;
 107                 frameperiod->denominator = 25;
 108         }
 109 }
 110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112 /* Fill in the fields of a v4l2_standard structure according to the
 113    'id' and 'transmission' parameters.  Returns negative on error.  */
 114 int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                              int id, const char *name)
 116 {
 117         vs->id = id;
 118         v4l2_video_std_frame_period(id, &vs->frameperiod);
 119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120         strscpy(vs->name, name, sizeof(vs->name));
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125 /* Fill in the fields of a v4l2_standard structure according to the
 126  * 'id' and 'vs->index' parameters. Returns negative on error. */
 127 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 128 {
 129         v4l2_std_id curr_id = 0;
 130         unsigned int index = vs->index, i, j = 0;
 131         const char *descr = "";
 132
 133         /* Return -ENODATA if the id for the current input
 134            or output is 0, meaning that it doesn't support this API. */
 135         if (id == 0)
 136                 return -ENODATA;
 137
 138         /* Return norm array in a canonical way */
 139         for (i = 0; i <= index && id; i++) {
 140                 /* last std value in the standards array is 0, so this
 141                    while always ends there since (id & 0) == 0. */
 142                 while ((id & standards[j].std) != standards[j].std)
 143                         j++;
 144                 curr_id = standards[j].std;
 145                 descr = standards[j].descr;
 146                 j++;
 147                 if (curr_id == 0)
 148                         break;
 149                 if (curr_id != V4L2_STD_PAL &&
 150                                 curr_id != V4L2_STD_SECAM &&
 151                                 curr_id != V4L2_STD_NTSC)
 152                         id &= ~curr_id;
 153         }
 154         if (i <= index)
 155                 return -EINVAL;
 156
 157         v4l2_video_std_construct(vs, curr_id, descr);
 158         return 0;
 159 }
 160
 161 /* ----------------------------------------------------------------- */
 162 /* some arrays for pretty-printing debug messages of enum types      */
 163
 164 const char *v4l2_field_names[] = {
 165         [V4L2_FIELD_ANY]        = "any",
 166         [V4L2_FIELD_NONE]       = "none",
 167         [V4L2_FIELD_TOP]        = "top",
 168         [V4L2_FIELD_BOTTOM]     = "bottom",
 169         [V4L2_FIELD_INTERLACED] = "interlaced",
 170         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 171         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 172         [V4L2_FIELD_ALTERNATE]  = "alternate",
 173         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 174         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 175 };
 176 EXPORT_SYMBOL(v4l2_field_names);
 177
 178 const char *v4l2_type_names[] = {
 179         [0]                                = "0",
 180         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 181         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 182         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 183         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 184         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 185         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 186         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 187         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 188         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 189         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 190         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 191         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 192         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 193         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 194 };
 195 EXPORT_SYMBOL(v4l2_type_names);
 196
 197 static const char *v4l2_memory_names[] = {
 198         [V4L2_MEMORY_MMAP]    = "mmap",
 199         [V4L2_MEMORY_USERPTR] = "userptr",
 200         [V4L2_MEMORY_OVERLAY] = "overlay",
 201         [V4L2_MEMORY_DMABUF] = "dmabuf",
 202 };
 203
 204 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 205
 206 /* ------------------------------------------------------------------ */
 207 /* debug help functions                                               */
 208
 209 static void v4l_print_querycap(const void *arg, bool write_only)
 210 {
 211         const struct v4l2_capability *p = arg;
 212
 213         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 214                 (int)sizeof(p->driver), p->driver,
 215                 (int)sizeof(p->card), p->card,
 216                 (int)sizeof(p->bus_info), p->bus_info,
 217                 p->version, p->capabilities, p->device_caps);
 218 }
 219
 220 static void v4l_print_enuminput(const void *arg, bool write_only)
 221 {
 222         const struct v4l2_input *p = arg;
 223
 224         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 225                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 226                 p->tuner, (unsigned long long)p->std, p->status,
 227                 p->capabilities);
 228 }
 229
 230 static void v4l_print_enumoutput(const void *arg, bool write_only)
 231 {
 232         const struct v4l2_output *p = arg;
 233
 234         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 235                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 236                 p->modulator, (unsigned long long)p->std, p->capabilities);
 237 }
 238
 239 static void v4l_print_audio(const void *arg, bool write_only)
 240 {
 241         const struct v4l2_audio *p = arg;
 242
 243         if (write_only)
 244                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 245         else
 246                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 247                         p->index, (int)sizeof(p->name), p->name,
 248                         p->capability, p->mode);
 249 }
 250
 251 static void v4l_print_audioout(const void *arg, bool write_only)
 252 {
 253         const struct v4l2_audioout *p = arg;
 254
 255         if (write_only)
 256                 pr_cont("index=%u\n", p->index);
 257         else
 258                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 259                         p->index, (int)sizeof(p->name), p->name,
 260                         p->capability, p->mode);
 261 }
 262
 263 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 264 {
 265         const struct v4l2_fmtdesc *p = arg;
 266
 267         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n",
 268                 p->index, prt_names(p->type, v4l2_type_names),
 269                 p->flags, (p->pixelformat & 0xff),
 270                 (p->pixelformat >>  8) & 0xff,
 271                 (p->pixelformat >> 16) & 0xff,
 272                 (p->pixelformat >> 24) & 0xff,
 273                 p->mbus_code,
 274                 (int)sizeof(p->description), p->description);
 275 }
 276
 277 static void v4l_print_format(const void *arg, bool write_only)
 278 {
 279         const struct v4l2_format *p = arg;
 280         const struct v4l2_pix_format *pix;
 281         const struct v4l2_pix_format_mplane *mp;
 282         const struct v4l2_vbi_format *vbi;
 283         const struct v4l2_sliced_vbi_format *sliced;
 284         const struct v4l2_window *win;
 285         const struct v4l2_sdr_format *sdr;
 286         const struct v4l2_meta_format *meta;
 287         u32 planes;
 288         unsigned i;
 289
 290         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 291         switch (p->type) {
 292         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 293         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 294                 pix = &p->fmt.pix;
 295                 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 296                         pix->width, pix->height,
 297                         (pix->pixelformat & 0xff),
 298                         (pix->pixelformat >>  8) & 0xff,
 299                         (pix->pixelformat >> 16) & 0xff,
 300                         (pix->pixelformat >> 24) & 0xff,
 301                         prt_names(pix->field, v4l2_field_names),
 302                         pix->bytesperline, pix->sizeimage,
 303                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 304                         pix->quantization, pix->xfer_func);
 305                 break;
 306         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 307         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 308                 mp = &p->fmt.pix_mp;
 309                 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 310                         mp->width, mp->height,
 311                         (mp->pixelformat & 0xff),
 312                         (mp->pixelformat >>  8) & 0xff,
 313                         (mp->pixelformat >> 16) & 0xff,
 314                         (mp->pixelformat >> 24) & 0xff,
 315                         prt_names(mp->field, v4l2_field_names),
 316                         mp->colorspace, mp->num_planes, mp->flags,
 317                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 318                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 319                 for (i = 0; i < planes; i++)
 320                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 321                                         mp->plane_fmt[i].bytesperline,
 322                                         mp->plane_fmt[i].sizeimage);
 323                 break;
 324         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 325         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 326                 win = &p->fmt.win;
 327                 /* Note: we can't print the clip list here since the clips
 328                  * pointer is a userspace pointer, not a kernelspace
 329                  * pointer. */
 330                 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",
 331                         win->w.width, win->w.height, win->w.left, win->w.top,
 332                         prt_names(win->field, v4l2_field_names),
 333                         win->chromakey, win->clipcount, win->clips,
 334                         win->bitmap, win->global_alpha);
 335                 break;
 336         case V4L2_BUF_TYPE_VBI_CAPTURE:
 337         case V4L2_BUF_TYPE_VBI_OUTPUT:
 338                 vbi = &p->fmt.vbi;
 339                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 340                         vbi->sampling_rate, vbi->offset,
 341                         vbi->samples_per_line,
 342                         (vbi->sample_format & 0xff),
 343                         (vbi->sample_format >>  8) & 0xff,
 344                         (vbi->sample_format >> 16) & 0xff,
 345                         (vbi->sample_format >> 24) & 0xff,
 346                         vbi->start[0], vbi->start[1],
 347                         vbi->count[0], vbi->count[1]);
 348                 break;
 349         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 350         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 351                 sliced = &p->fmt.sliced;
 352                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 353                                 sliced->service_set, sliced->io_size);
 354                 for (i = 0; i < 24; i++)
 355                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 356                                 sliced->service_lines[0][i],
 357                                 sliced->service_lines[1][i]);
 358                 break;
 359         case V4L2_BUF_TYPE_SDR_CAPTURE:
 360         case V4L2_BUF_TYPE_SDR_OUTPUT:
 361                 sdr = &p->fmt.sdr;
 362                 pr_cont(", pixelformat=%c%c%c%c\n",
 363                         (sdr->pixelformat >>  0) & 0xff,
 364                         (sdr->pixelformat >>  8) & 0xff,
 365                         (sdr->pixelformat >> 16) & 0xff,
 366                         (sdr->pixelformat >> 24) & 0xff);
 367                 break;
 368         case V4L2_BUF_TYPE_META_CAPTURE:
 369         case V4L2_BUF_TYPE_META_OUTPUT:
 370                 meta = &p->fmt.meta;
 371                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 372                         (meta->dataformat >>  0) & 0xff,
 373                         (meta->dataformat >>  8) & 0xff,
 374                         (meta->dataformat >> 16) & 0xff,
 375                         (meta->dataformat >> 24) & 0xff,
 376                         meta->buffersize);
 377                 break;
 378         }
 379 }
 380
 381 static void v4l_print_framebuffer(const void *arg, bool write_only)
 382 {
 383         const struct v4l2_framebuffer *p = arg;
 384
 385         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 386                         p->capability, p->flags, p->base,
 387                         p->fmt.width, p->fmt.height,
 388                         (p->fmt.pixelformat & 0xff),
 389                         (p->fmt.pixelformat >>  8) & 0xff,
 390                         (p->fmt.pixelformat >> 16) & 0xff,
 391                         (p->fmt.pixelformat >> 24) & 0xff,
 392                         p->fmt.bytesperline, p->fmt.sizeimage,
 393                         p->fmt.colorspace);
 394 }
 395
 396 static void v4l_print_buftype(const void *arg, bool write_only)
 397 {
 398         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 399 }
 400
 401 static void v4l_print_modulator(const void *arg, bool write_only)
 402 {
 403         const struct v4l2_modulator *p = arg;
 404
 405         if (write_only)
 406                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 407         else
 408                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 409                         p->index, (int)sizeof(p->name), p->name, p->capability,
 410                         p->rangelow, p->rangehigh, p->txsubchans);
 411 }
 412
 413 static void v4l_print_tuner(const void *arg, bool write_only)
 414 {
 415         const struct v4l2_tuner *p = arg;
 416
 417         if (write_only)
 418                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 419         else
 420                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 421                         p->index, (int)sizeof(p->name), p->name, p->type,
 422                         p->capability, p->rangelow,
 423                         p->rangehigh, p->signal, p->afc,
 424                         p->rxsubchans, p->audmode);
 425 }
 426
 427 static void v4l_print_frequency(const void *arg, bool write_only)
 428 {
 429         const struct v4l2_frequency *p = arg;
 430
 431         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 432                                 p->tuner, p->type, p->frequency);
 433 }
 434
 435 static void v4l_print_standard(const void *arg, bool write_only)
 436 {
 437         const struct v4l2_standard *p = arg;
 438
 439         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 440                 p->index,
 441                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 442                 p->frameperiod.numerator,
 443                 p->frameperiod.denominator,
 444                 p->framelines);
 445 }
 446
 447 static void v4l_print_std(const void *arg, bool write_only)
 448 {
 449         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 450 }
 451
 452 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 453 {
 454         const struct v4l2_hw_freq_seek *p = arg;
 455
 456         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 457                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 458                 p->rangelow, p->rangehigh);
 459 }
 460
 461 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 462 {
 463         const struct v4l2_requestbuffers *p = arg;
 464
 465         pr_cont("count=%d, type=%s, memory=%s\n",
 466                 p->count,
 467                 prt_names(p->type, v4l2_type_names),
 468                 prt_names(p->memory, v4l2_memory_names));
 469 }
 470
 471 static void v4l_print_buffer(const void *arg, bool write_only)
 472 {
 473         const struct v4l2_buffer *p = arg;
 474         const struct v4l2_timecode *tc = &p->timecode;
 475         const struct v4l2_plane *plane;
 476         int i;
 477
 478         pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 479                         (int)p->timestamp.tv_sec / 3600,
 480                         ((int)p->timestamp.tv_sec / 60) % 60,
 481                         ((int)p->timestamp.tv_sec % 60),
 482                         (long)p->timestamp.tv_usec,
 483                         p->index,
 484                         prt_names(p->type, v4l2_type_names), p->request_fd,
 485                         p->flags, prt_names(p->field, v4l2_field_names),
 486                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 487
 488         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 489                 pr_cont("\n");
 490                 for (i = 0; i < p->length; ++i) {
 491                         plane = &p->m.planes[i];
 492                         printk(KERN_DEBUG
 493                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 494                                 i, plane->bytesused, plane->data_offset,
 495                                 plane->m.userptr, plane->length);
 496                 }
 497         } else {
 498                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 499                         p->bytesused, p->m.userptr, p->length);
 500         }
 501
 502         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 503                         tc->hours, tc->minutes, tc->seconds,
 504                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 505 }
 506
 507 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 508 {
 509         const struct v4l2_exportbuffer *p = arg;
 510
 511         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 512                 p->fd, prt_names(p->type, v4l2_type_names),
 513                 p->index, p->plane, p->flags);
 514 }
 515
 516 static void v4l_print_create_buffers(const void *arg, bool write_only)
 517 {
 518         const struct v4l2_create_buffers *p = arg;
 519
 520         pr_cont("index=%d, count=%d, memory=%s, ",
 521                         p->index, p->count,
 522                         prt_names(p->memory, v4l2_memory_names));
 523         v4l_print_format(&p->format, write_only);
 524 }
 525
 526 static void v4l_print_streamparm(const void *arg, bool write_only)
 527 {
 528         const struct v4l2_streamparm *p = arg;
 529
 530         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 531
 532         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 533             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 534                 const struct v4l2_captureparm *c = &p->parm.capture;
 535
 536                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 537                         c->capability, c->capturemode,
 538                         c->timeperframe.numerator, c->timeperframe.denominator,
 539                         c->extendedmode, c->readbuffers);
 540         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 541                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 542                 const struct v4l2_outputparm *c = &p->parm.output;
 543
 544                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 545                         c->capability, c->outputmode,
 546                         c->timeperframe.numerator, c->timeperframe.denominator,
 547                         c->extendedmode, c->writebuffers);
 548         } else {
 549                 pr_cont("\n");
 550         }
 551 }
 552
 553 static void v4l_print_queryctrl(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_queryctrl *p = arg;
 556
 557         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 558                         p->id, p->type, (int)sizeof(p->name), p->name,
 559                         p->minimum, p->maximum,
 560                         p->step, p->default_value, p->flags);
 561 }
 562
 563 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 564 {
 565         const struct v4l2_query_ext_ctrl *p = arg;
 566
 567         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 568                         p->id, p->type, (int)sizeof(p->name), p->name,
 569                         p->minimum, p->maximum,
 570                         p->step, p->default_value, p->flags,
 571                         p->elem_size, p->elems, p->nr_of_dims,
 572                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 573 }
 574
 575 static void v4l_print_querymenu(const void *arg, bool write_only)
 576 {
 577         const struct v4l2_querymenu *p = arg;
 578
 579         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 580 }
 581
 582 static void v4l_print_control(const void *arg, bool write_only)
 583 {
 584         const struct v4l2_control *p = arg;
 585         const char *name = v4l2_ctrl_get_name(p->id);
 586
 587         if (name)
 588                 pr_cont("name=%s, ", name);
 589         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 590 }
 591
 592 static void v4l_print_ext_controls(const void *arg, bool write_only)
 593 {
 594         const struct v4l2_ext_controls *p = arg;
 595         int i;
 596
 597         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 598                         p->which, p->count, p->error_idx, p->request_fd);
 599         for (i = 0; i < p->count; i++) {
 600                 unsigned int id = p->controls[i].id;
 601                 const char *name = v4l2_ctrl_get_name(id);
 602
 603                 if (name)
 604                         pr_cont(", name=%s", name);
 605                 if (!p->controls[i].size)
 606                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 607                 else
 608                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 609         }
 610         pr_cont("\n");
 611 }
 612
 613 static void v4l_print_cropcap(const void *arg, bool write_only)
 614 {
 615         const struct v4l2_cropcap *p = arg;
 616
 617         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 618                 prt_names(p->type, v4l2_type_names),
 619                 p->bounds.width, p->bounds.height,
 620                 p->bounds.left, p->bounds.top,
 621                 p->defrect.width, p->defrect.height,
 622                 p->defrect.left, p->defrect.top,
 623                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 624 }
 625
 626 static void v4l_print_crop(const void *arg, bool write_only)
 627 {
 628         const struct v4l2_crop *p = arg;
 629
 630         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 631                 prt_names(p->type, v4l2_type_names),
 632                 p->c.width, p->c.height,
 633                 p->c.left, p->c.top);
 634 }
 635
 636 static void v4l_print_selection(const void *arg, bool write_only)
 637 {
 638         const struct v4l2_selection *p = arg;
 639
 640         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 641                 prt_names(p->type, v4l2_type_names),
 642                 p->target, p->flags,
 643                 p->r.width, p->r.height, p->r.left, p->r.top);
 644 }
 645
 646 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 647 {
 648         const struct v4l2_jpegcompression *p = arg;
 649
 650         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 651                 p->quality, p->APPn, p->APP_len,
 652                 p->COM_len, p->jpeg_markers);
 653 }
 654
 655 static void v4l_print_enc_idx(const void *arg, bool write_only)
 656 {
 657         const struct v4l2_enc_idx *p = arg;
 658
 659         pr_cont("entries=%d, entries_cap=%d\n",
 660                         p->entries, p->entries_cap);
 661 }
 662
 663 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 664 {
 665         const struct v4l2_encoder_cmd *p = arg;
 666
 667         pr_cont("cmd=%d, flags=0x%x\n",
 668                         p->cmd, p->flags);
 669 }
 670
 671 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 672 {
 673         const struct v4l2_decoder_cmd *p = arg;
 674
 675         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 676
 677         if (p->cmd == V4L2_DEC_CMD_START)
 678                 pr_info("speed=%d, format=%u\n",
 679                                 p->start.speed, p->start.format);
 680         else if (p->cmd == V4L2_DEC_CMD_STOP)
 681                 pr_info("pts=%llu\n", p->stop.pts);
 682 }
 683
 684 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 685 {
 686         const struct v4l2_dbg_chip_info *p = arg;
 687
 688         pr_cont("type=%u, ", p->match.type);
 689         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 690                 pr_cont("name=%.*s, ",
 691                                 (int)sizeof(p->match.name), p->match.name);
 692         else
 693                 pr_cont("addr=%u, ", p->match.addr);
 694         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 695 }
 696
 697 static void v4l_print_dbg_register(const void *arg, bool write_only)
 698 {
 699         const struct v4l2_dbg_register *p = arg;
 700
 701         pr_cont("type=%u, ", p->match.type);
 702         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 703                 pr_cont("name=%.*s, ",
 704                                 (int)sizeof(p->match.name), p->match.name);
 705         else
 706                 pr_cont("addr=%u, ", p->match.addr);
 707         pr_cont("reg=0x%llx, val=0x%llx\n",
 708                         p->reg, p->val);
 709 }
 710
 711 static void v4l_print_dv_timings(const void *arg, bool write_only)
 712 {
 713         const struct v4l2_dv_timings *p = arg;
 714
 715         switch (p->type) {
 716         case V4L2_DV_BT_656_1120:
 717                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 718                                 p->bt.interlaced, p->bt.pixelclock,
 719                                 p->bt.width, p->bt.height,
 720                                 p->bt.polarities, p->bt.hfrontporch,
 721                                 p->bt.hsync, p->bt.hbackporch,
 722                                 p->bt.vfrontporch, p->bt.vsync,
 723                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 724                                 p->bt.il_vsync, p->bt.il_vbackporch,
 725                                 p->bt.standards, p->bt.flags);
 726                 break;
 727         default:
 728                 pr_cont("type=%d\n", p->type);
 729                 break;
 730         }
 731 }
 732
 733 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 734 {
 735         const struct v4l2_enum_dv_timings *p = arg;
 736
 737         pr_cont("index=%u, ", p->index);
 738         v4l_print_dv_timings(&p->timings, write_only);
 739 }
 740
 741 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 742 {
 743         const struct v4l2_dv_timings_cap *p = arg;
 744
 745         switch (p->type) {
 746         case V4L2_DV_BT_656_1120:
 747                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 748                         p->bt.min_width, p->bt.max_width,
 749                         p->bt.min_height, p->bt.max_height,
 750                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 751                         p->bt.standards, p->bt.capabilities);
 752                 break;
 753         default:
 754                 pr_cont("type=%u\n", p->type);
 755                 break;
 756         }
 757 }
 758
 759 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 760 {
 761         const struct v4l2_frmsizeenum *p = arg;
 762
 763         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 764                         p->index,
 765                         (p->pixel_format & 0xff),
 766                         (p->pixel_format >>  8) & 0xff,
 767                         (p->pixel_format >> 16) & 0xff,
 768                         (p->pixel_format >> 24) & 0xff,
 769                         p->type);
 770         switch (p->type) {
 771         case V4L2_FRMSIZE_TYPE_DISCRETE:
 772                 pr_cont(", wxh=%ux%u\n",
 773                         p->discrete.width, p->discrete.height);
 774                 break;
 775         case V4L2_FRMSIZE_TYPE_STEPWISE:
 776                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 777                                 p->stepwise.min_width,
 778                                 p->stepwise.min_height,
 779                                 p->stepwise.max_width,
 780                                 p->stepwise.max_height,
 781                                 p->stepwise.step_width,
 782                                 p->stepwise.step_height);
 783                 break;
 784         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 785         default:
 786                 pr_cont("\n");
 787                 break;
 788         }
 789 }
 790
 791 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 792 {
 793         const struct v4l2_frmivalenum *p = arg;
 794
 795         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 796                         p->index,
 797                         (p->pixel_format & 0xff),
 798                         (p->pixel_format >>  8) & 0xff,
 799                         (p->pixel_format >> 16) & 0xff,
 800                         (p->pixel_format >> 24) & 0xff,
 801                         p->width, p->height, p->type);
 802         switch (p->type) {
 803         case V4L2_FRMIVAL_TYPE_DISCRETE:
 804                 pr_cont(", fps=%d/%d\n",
 805                                 p->discrete.numerator,
 806                                 p->discrete.denominator);
 807                 break;
 808         case V4L2_FRMIVAL_TYPE_STEPWISE:
 809                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 810                                 p->stepwise.min.numerator,
 811                                 p->stepwise.min.denominator,
 812                                 p->stepwise.max.numerator,
 813                                 p->stepwise.max.denominator,
 814                                 p->stepwise.step.numerator,
 815                                 p->stepwise.step.denominator);
 816                 break;
 817         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 818         default:
 819                 pr_cont("\n");
 820                 break;
 821         }
 822 }
 823
 824 static void v4l_print_event(const void *arg, bool write_only)
 825 {
 826         const struct v4l2_event *p = arg;
 827         const struct v4l2_event_ctrl *c;
 828
 829         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 830                         p->type, p->pending, p->sequence, p->id,
 831                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 832         switch (p->type) {
 833         case V4L2_EVENT_VSYNC:
 834                 printk(KERN_DEBUG "field=%s\n",
 835                         prt_names(p->u.vsync.field, v4l2_field_names));
 836                 break;
 837         case V4L2_EVENT_CTRL:
 838                 c = &p->u.ctrl;
 839                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 840                         c->changes, c->type);
 841                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 842                         pr_cont("value64=%lld, ", c->value64);
 843                 else
 844                         pr_cont("value=%d, ", c->value);
 845                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 846                         c->flags, c->minimum, c->maximum,
 847                         c->step, c->default_value);
 848                 break;
 849         case V4L2_EVENT_FRAME_SYNC:
 850                 pr_cont("frame_sequence=%u\n",
 851                         p->u.frame_sync.frame_sequence);
 852                 break;
 853         }
 854 }
 855
 856 static void v4l_print_event_subscription(const void *arg, bool write_only)
 857 {
 858         const struct v4l2_event_subscription *p = arg;
 859
 860         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 861                         p->type, p->id, p->flags);
 862 }
 863
 864 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 865 {
 866         const struct v4l2_sliced_vbi_cap *p = arg;
 867         int i;
 868
 869         pr_cont("type=%s, service_set=0x%08x\n",
 870                         prt_names(p->type, v4l2_type_names), p->service_set);
 871         for (i = 0; i < 24; i++)
 872                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 873                                 p->service_lines[0][i],
 874                                 p->service_lines[1][i]);
 875 }
 876
 877 static void v4l_print_freq_band(const void *arg, bool write_only)
 878 {
 879         const struct v4l2_frequency_band *p = arg;
 880
 881         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 882                         p->tuner, p->type, p->index,
 883                         p->capability, p->rangelow,
 884                         p->rangehigh, p->modulation);
 885 }
 886
 887 static void v4l_print_edid(const void *arg, bool write_only)
 888 {
 889         const struct v4l2_edid *p = arg;
 890
 891         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 892                 p->pad, p->start_block, p->blocks);
 893 }
 894
 895 static void v4l_print_u32(const void *arg, bool write_only)
 896 {
 897         pr_cont("value=%u\n", *(const u32 *)arg);
 898 }
 899
 900 static void v4l_print_newline(const void *arg, bool write_only)
 901 {
 902         pr_cont("\n");
 903 }
 904
 905 static void v4l_print_default(const void *arg, bool write_only)
 906 {
 907         pr_cont("driver-specific ioctl\n");
 908 }
 909
 910 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 911 {
 912         __u32 i;
 913
 914         /* zero the reserved fields */
 915         c->reserved[0] = 0;
 916         for (i = 0; i < c->count; i++)
 917                 c->controls[i].reserved2[0] = 0;
 918
 919         switch (c->which) {
 920         case V4L2_CID_PRIVATE_BASE:
 921                 /*
 922                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 923                  * when using extended controls.
 924                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 925                  * is it allowed for backwards compatibility.
 926                  */
 927                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 928                         return false;
 929                 break;
 930         case V4L2_CTRL_WHICH_DEF_VAL:
 931                 /* Default value cannot be changed */
 932                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 933                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 934                         c->error_idx = c->count;
 935                         return false;
 936                 }
 937                 return true;
 938         case V4L2_CTRL_WHICH_CUR_VAL:
 939                 return true;
 940         case V4L2_CTRL_WHICH_REQUEST_VAL:
 941                 c->error_idx = c->count;
 942                 return false;
 943         }
 944
 945         /* Check that all controls are from the same control class. */
 946         for (i = 0; i < c->count; i++) {
 947                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 948                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 949                                                                       c->count;
 950                         return false;
 951                 }
 952         }
 953         return true;
 954 }
 955
 956 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 957 {
 958         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 959                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 960                              V4L2_CAP_VIDEO_OUTPUT |
 961                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 962                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 963         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 964                               V4L2_CAP_META_OUTPUT;
 965         struct video_device *vfd = video_devdata(file);
 966         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 967         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 968                       (vfd->device_caps & vid_caps);
 969         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 970         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 971         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 972         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 973                        (vfd->device_caps & meta_caps);
 974         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 975         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 976
 977         if (ops == NULL)
 978                 return -EINVAL;
 979
 980         switch (type) {
 981         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 982                 if ((is_vid || is_tch) && is_rx &&
 983                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 984                         return 0;
 985                 break;
 986         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 987                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 988                         return 0;
 989                 break;
 990         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 991                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 992                         return 0;
 993                 break;
 994         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 995                 if (is_vid && is_tx &&
 996                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 997                         return 0;
 998                 break;
 999         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1000                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
1001                         return 0;
1002                 break;
1003         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1004                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
1005                         return 0;
1006                 break;
1007         case V4L2_BUF_TYPE_VBI_CAPTURE:
1008                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
1009                         return 0;
1010                 break;
1011         case V4L2_BUF_TYPE_VBI_OUTPUT:
1012                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
1013                         return 0;
1014                 break;
1015         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1016                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
1017                         return 0;
1018                 break;
1019         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1020                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
1021                         return 0;
1022                 break;
1023         case V4L2_BUF_TYPE_SDR_CAPTURE:
1024                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
1025                         return 0;
1026                 break;
1027         case V4L2_BUF_TYPE_SDR_OUTPUT:
1028                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
1029                         return 0;
1030                 break;
1031         case V4L2_BUF_TYPE_META_CAPTURE:
1032                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
1033                         return 0;
1034                 break;
1035         case V4L2_BUF_TYPE_META_OUTPUT:
1036                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1037                         return 0;
1038                 break;
1039         default:
1040                 break;
1041         }
1042         return -EINVAL;
1043 }
1044
1045 static void v4l_sanitize_format(struct v4l2_format *fmt)
1046 {
1047         unsigned int offset;
1048
1049         /* Make sure num_planes is not bogus */
1050         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1051             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1052                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1053                                                VIDEO_MAX_PLANES);
1054
1055         /*
1056          * The v4l2_pix_format structure has been extended with fields that were
1057          * not previously required to be set to zero by applications. The priv
1058          * field, when set to a magic value, indicates the the extended fields
1059          * are valid. Otherwise they will contain undefined values. To simplify
1060          * the API towards drivers zero the extended fields and set the priv
1061          * field to the magic value when the extended pixel format structure
1062          * isn't used by applications.
1063          */
1064
1065         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1066             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1067                 return;
1068
1069         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1070                 return;
1071
1072         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1073
1074         offset = offsetof(struct v4l2_pix_format, priv)
1075                + sizeof(fmt->fmt.pix.priv);
1076         memset(((void *)&fmt->fmt.pix) + offset, 0,
1077                sizeof(fmt->fmt.pix) - offset);
1078 }
1079
1080 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1081                                 struct file *file, void *fh, void *arg)
1082 {
1083         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1084         struct video_device *vfd = video_devdata(file);
1085         int ret;
1086
1087         cap->version = LINUX_VERSION_CODE;
1088         cap->device_caps = vfd->device_caps;
1089         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1090
1091         ret = ops->vidioc_querycap(file, fh, cap);
1092
1093         /*
1094          * Drivers must not change device_caps, so check for this and
1095          * warn if this happened.
1096          */
1097         WARN_ON(cap->device_caps != vfd->device_caps);
1098         /*
1099          * Check that capabilities is a superset of
1100          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1101          */
1102         WARN_ON((cap->capabilities &
1103                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1104                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1105         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1106         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1107
1108         return ret;
1109 }
1110
1111 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1112                        struct file *file, void *fh, void *arg)
1113 {
1114         struct video_device *vfd = video_devdata(file);
1115
1116         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1117                 *(int *)arg = 0;
1118                 return 0;
1119         }
1120
1121         return ops->vidioc_g_input(file, fh, arg);
1122 }
1123
1124 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1125                         struct file *file, void *fh, void *arg)
1126 {
1127         struct video_device *vfd = video_devdata(file);
1128
1129         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1130                 *(int *)arg = 0;
1131                 return 0;
1132         }
1133
1134         return ops->vidioc_g_output(file, fh, arg);
1135 }
1136
1137 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1138                                 struct file *file, void *fh, void *arg)
1139 {
1140         struct video_device *vfd = video_devdata(file);
1141         int ret;
1142
1143         ret = v4l_enable_media_source(vfd);
1144         if (ret)
1145                 return ret;
1146
1147         if (vfd->device_caps & V4L2_CAP_IO_MC)
1148                 return  *(int *)arg ? -EINVAL : 0;
1149
1150         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1151 }
1152
1153 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1154                                 struct file *file, void *fh, void *arg)
1155 {
1156         struct video_device *vfd = video_devdata(file);
1157
1158         if (vfd->device_caps & V4L2_CAP_IO_MC)
1159                 return  *(int *)arg ? -EINVAL : 0;
1160
1161         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1162 }
1163
1164 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1165                                 struct file *file, void *fh, void *arg)
1166 {
1167         struct video_device *vfd;
1168         u32 *p = arg;
1169
1170         vfd = video_devdata(file);
1171         *p = v4l2_prio_max(vfd->prio);
1172         return 0;
1173 }
1174
1175 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1176                                 struct file *file, void *fh, void *arg)
1177 {
1178         struct video_device *vfd;
1179         struct v4l2_fh *vfh;
1180         u32 *p = arg;
1181
1182         vfd = video_devdata(file);
1183         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1184                 return -ENOTTY;
1185         vfh = file->private_data;
1186         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1187 }
1188
1189 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1190                                 struct file *file, void *fh, void *arg)
1191 {
1192         struct video_device *vfd = video_devdata(file);
1193         struct v4l2_input *p = arg;
1194
1195         /*
1196          * We set the flags for CAP_DV_TIMINGS &
1197          * CAP_STD here based on ioctl handler provided by the
1198          * driver. If the driver doesn't support these
1199          * for a specific input, it must override these flags.
1200          */
1201         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1202                 p->capabilities |= V4L2_IN_CAP_STD;
1203
1204         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1205                 if (p->index)
1206                         return -EINVAL;
1207                 strscpy(p->name, vfd->name, sizeof(p->name));
1208                 p->type = V4L2_INPUT_TYPE_CAMERA;
1209                 return 0;
1210         }
1211
1212         return ops->vidioc_enum_input(file, fh, p);
1213 }
1214
1215 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1216                                 struct file *file, void *fh, void *arg)
1217 {
1218         struct video_device *vfd = video_devdata(file);
1219         struct v4l2_output *p = arg;
1220
1221         /*
1222          * We set the flags for CAP_DV_TIMINGS &
1223          * CAP_STD here based on ioctl handler provided by the
1224          * driver. If the driver doesn't support these
1225          * for a specific output, it must override these flags.
1226          */
1227         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1228                 p->capabilities |= V4L2_OUT_CAP_STD;
1229
1230         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1231                 if (p->index)
1232                         return -EINVAL;
1233                 strscpy(p->name, vfd->name, sizeof(p->name));
1234                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1235                 return 0;
1236         }
1237
1238         return ops->vidioc_enum_output(file, fh, p);
1239 }
1240
1241 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1242 {
1243         const unsigned sz = sizeof(fmt->description);
1244         const char *descr = NULL;
1245         u32 flags = 0;
1246
1247         /*
1248          * We depart from the normal coding style here since the descriptions
1249          * should be aligned so it is easy to see which descriptions will be
1250          * longer than 31 characters (the max length for a description).
1251          * And frankly, this is easier to read anyway.
1252          *
1253          * Note that gcc will use O(log N) comparisons to find the right case.
1254          */
1255         switch (fmt->pixelformat) {
1256         /* Max description length mask: descr = "0123456789012345678901234567890" */
1257         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1258         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1259         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1260         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1261         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1262         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1263         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1264         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1265         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1266         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1267         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1268         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1269         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1270         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1271         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1272         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1273         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1274         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1275         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1276         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1277         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1278         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1279         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1280         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1281         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1282         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1283         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1284         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1285         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1286         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1287         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1288         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1289         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1290         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1291         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1292         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1293         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1294         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1295         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1296         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1297         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1298         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1299         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1300         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1301         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1302         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1303         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1304         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1305         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1306         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1307         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1308         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1309         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1310         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1311         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1312         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1313         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1314         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1315         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1316         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1317         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1318         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1319         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1320         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1321         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1322         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1323         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1324         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1325         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1326         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1327         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1328         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1329         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1330         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1331         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1332         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1333         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1334         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1335         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1336         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1337         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1338         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1339         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1340         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1341         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1342         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1343         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1344         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1345         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1346         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1347         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1348         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1349         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1350         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1351         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1352         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1353         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1354         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1355         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1356         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1357         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1358         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1359         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1360         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1361         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1362         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1363         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1364         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1365         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1366         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1367         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1368         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1369         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1370         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1371         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1372         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1373         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1374         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1375         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1376         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1377         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1378         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1379         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1380         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1381         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1382         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1383         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1384         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1385         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1386         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1387         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1388         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1389         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1390         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1391         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1392         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1393         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1394         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1395         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1396         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1397         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1398         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1399         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1400         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1401         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1402         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1403         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1404         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1405         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1406         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1407         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1408         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1409         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1410         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1411         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1412         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1413         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1414         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1415         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1416         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1417         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1418         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1419         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1420         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1421         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1422         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1423
1424         default:
1425                 /* Compressed formats */
1426                 flags = V4L2_FMT_FLAG_COMPRESSED;
1427                 switch (fmt->pixelformat) {
1428                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1429                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1430                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1431                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1432                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1433                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1434                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1435                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1436                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1437                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1438                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1439                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1440                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1441                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1442                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1443                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1444                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1445                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1446                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1447                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1448                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1449                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1450                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1451                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1452                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1453                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1454                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1455                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1456                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1457                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1458                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1459                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1460                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1461                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1462                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1463                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1464                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1465                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1466                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1467                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1468                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1469                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1470                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1471                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1472                 default:
1473                         if (fmt->description[0])
1474                                 return;
1475                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1476                         flags = 0;
1477                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1478                                         (char)(fmt->pixelformat & 0x7f),
1479                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1480                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1481                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1482                                         (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1483                         break;
1484                 }
1485         }
1486
1487         if (descr)
1488                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1489         fmt->flags |= flags;
1490 }
1491
1492 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1493                                 struct file *file, void *fh, void *arg)
1494 {
1495         struct video_device *vdev = video_devdata(file);
1496         struct v4l2_fmtdesc *p = arg;
1497         int ret = check_fmt(file, p->type);
1498         u32 mbus_code;
1499         u32 cap_mask;
1500
1501         if (ret)
1502                 return ret;
1503         ret = -EINVAL;
1504
1505         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1506                 p->mbus_code = 0;
1507
1508         mbus_code = p->mbus_code;
1509         CLEAR_AFTER_FIELD(p, type);
1510         p->mbus_code = mbus_code;
1511
1512         switch (p->type) {
1513         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1514         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1515                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1516                            V4L2_CAP_VIDEO_M2M_MPLANE;
1517                 if (!!(vdev->device_caps & cap_mask) !=
1518                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1519                         break;
1520
1521                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1522                         break;
1523                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1524                 break;
1525         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1526                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1527                         break;
1528                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1529                 break;
1530         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1531         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1532                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1533                            V4L2_CAP_VIDEO_M2M_MPLANE;
1534                 if (!!(vdev->device_caps & cap_mask) !=
1535                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1536                         break;
1537
1538                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1539                         break;
1540                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1541                 break;
1542         case V4L2_BUF_TYPE_SDR_CAPTURE:
1543                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1544                         break;
1545                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1546                 break;
1547         case V4L2_BUF_TYPE_SDR_OUTPUT:
1548                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1549                         break;
1550                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1551                 break;
1552         case V4L2_BUF_TYPE_META_CAPTURE:
1553                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1554                         break;
1555                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1556                 break;
1557         case V4L2_BUF_TYPE_META_OUTPUT:
1558                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1559                         break;
1560                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1561                 break;
1562         }
1563         if (ret == 0)
1564                 v4l_fill_fmtdesc(p);
1565         return ret;
1566 }
1567
1568 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1569 {
1570         /*
1571          * The v4l2_pix_format structure contains fields that make no sense for
1572          * touch. Set them to default values in this case.
1573          */
1574
1575         p->field = V4L2_FIELD_NONE;
1576         p->colorspace = V4L2_COLORSPACE_RAW;
1577         p->flags = 0;
1578         p->ycbcr_enc = 0;
1579         p->quantization = 0;
1580         p->xfer_func = 0;
1581 }
1582
1583 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1584                                 struct file *file, void *fh, void *arg)
1585 {
1586         struct v4l2_format *p = arg;
1587         struct video_device *vfd = video_devdata(file);
1588         int ret = check_fmt(file, p->type);
1589
1590         if (ret)
1591                 return ret;
1592
1593         /*
1594          * fmt can't be cleared for these overlay types due to the 'clips'
1595          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1596          * Those are provided by the user. So handle these two overlay types
1597          * first, and then just do a simple memset for the other types.
1598          */
1599         switch (p->type) {
1600         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1601         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1602                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1603                 u32 clipcount = p->fmt.win.clipcount;
1604                 void __user *bitmap = p->fmt.win.bitmap;
1605
1606                 memset(&p->fmt, 0, sizeof(p->fmt));
1607                 p->fmt.win.clips = clips;
1608                 p->fmt.win.clipcount = clipcount;
1609                 p->fmt.win.bitmap = bitmap;
1610                 break;
1611         }
1612         default:
1613                 memset(&p->fmt, 0, sizeof(p->fmt));
1614                 break;
1615         }
1616
1617         switch (p->type) {
1618         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1619                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1620                         break;
1621                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1622                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1623                 /* just in case the driver zeroed it again */
1624                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1625                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1626                         v4l_pix_format_touch(&p->fmt.pix);
1627                 return ret;
1628         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1629                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1630         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1631                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1632         case V4L2_BUF_TYPE_VBI_CAPTURE:
1633                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1634         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1635                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1636         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1637                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1638                         break;
1639                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1640                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1641                 /* just in case the driver zeroed it again */
1642                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1643                 return ret;
1644         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1645                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1646         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1647                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1648         case V4L2_BUF_TYPE_VBI_OUTPUT:
1649                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1650         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1651                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1652         case V4L2_BUF_TYPE_SDR_CAPTURE:
1653                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1654         case V4L2_BUF_TYPE_SDR_OUTPUT:
1655                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1656         case V4L2_BUF_TYPE_META_CAPTURE:
1657                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1658         case V4L2_BUF_TYPE_META_OUTPUT:
1659                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1660         }
1661         return -EINVAL;
1662 }
1663
1664 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1665                                 struct file *file, void *fh, void *arg)
1666 {
1667         struct v4l2_format *p = arg;
1668         struct video_device *vfd = video_devdata(file);
1669         int ret = check_fmt(file, p->type);
1670         unsigned int i;
1671
1672         if (ret)
1673                 return ret;
1674
1675         ret = v4l_enable_media_source(vfd);
1676         if (ret)
1677                 return ret;
1678         v4l_sanitize_format(p);
1679
1680         switch (p->type) {
1681         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1682                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1683                         break;
1684                 CLEAR_AFTER_FIELD(p, fmt.pix);
1685                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1686                 /* just in case the driver zeroed it again */
1687                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1688                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1689                         v4l_pix_format_touch(&p->fmt.pix);
1690                 return ret;
1691         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1692                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1693                         break;
1694                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1695                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1696                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1697                                           bytesperline);
1698                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1699         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1700                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1701                         break;
1702                 CLEAR_AFTER_FIELD(p, fmt.win);
1703                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1704         case V4L2_BUF_TYPE_VBI_CAPTURE:
1705                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1706                         break;
1707                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1708                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1709         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1710                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1711                         break;
1712                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1713                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1714         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1715                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1716                         break;
1717                 CLEAR_AFTER_FIELD(p, fmt.pix);
1718                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1719                 /* just in case the driver zeroed it again */
1720                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1721                 return ret;
1722         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1723                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1724                         break;
1725                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1726                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1727                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1728                                           bytesperline);
1729                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1730         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1731                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1732                         break;
1733                 CLEAR_AFTER_FIELD(p, fmt.win);
1734                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1735         case V4L2_BUF_TYPE_VBI_OUTPUT:
1736                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1737                         break;
1738                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1739                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1740         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1741                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1742                         break;
1743                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1744                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1745         case V4L2_BUF_TYPE_SDR_CAPTURE:
1746                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1747                         break;
1748                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1749                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1750         case V4L2_BUF_TYPE_SDR_OUTPUT:
1751                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1752                         break;
1753                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1754                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1755         case V4L2_BUF_TYPE_META_CAPTURE:
1756                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1757                         break;
1758                 CLEAR_AFTER_FIELD(p, fmt.meta);
1759                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1760         case V4L2_BUF_TYPE_META_OUTPUT:
1761                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1762                         break;
1763                 CLEAR_AFTER_FIELD(p, fmt.meta);
1764                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1765         }
1766         return -EINVAL;
1767 }
1768
1769 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1770                                 struct file *file, void *fh, void *arg)
1771 {
1772         struct v4l2_format *p = arg;
1773         struct video_device *vfd = video_devdata(file);
1774         int ret = check_fmt(file, p->type);
1775         unsigned int i;
1776
1777         if (ret)
1778                 return ret;
1779
1780         v4l_sanitize_format(p);
1781
1782         switch (p->type) {
1783         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1784                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1785                         break;
1786                 CLEAR_AFTER_FIELD(p, fmt.pix);
1787                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1788                 /* just in case the driver zeroed it again */
1789                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1790                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1791                         v4l_pix_format_touch(&p->fmt.pix);
1792                 return ret;
1793         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1794                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1795                         break;
1796                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1797                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1798                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1799                                           bytesperline);
1800                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1801         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1802                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1803                         break;
1804                 CLEAR_AFTER_FIELD(p, fmt.win);
1805                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1806         case V4L2_BUF_TYPE_VBI_CAPTURE:
1807                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1808                         break;
1809                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1810                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1811         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1812                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1813                         break;
1814                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1815                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1816         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1817                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1818                         break;
1819                 CLEAR_AFTER_FIELD(p, fmt.pix);
1820                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1821                 /* just in case the driver zeroed it again */
1822                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1823                 return ret;
1824         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1825                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1826                         break;
1827                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1828                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1829                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1830                                           bytesperline);
1831                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1832         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1833                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1834                         break;
1835                 CLEAR_AFTER_FIELD(p, fmt.win);
1836                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1837         case V4L2_BUF_TYPE_VBI_OUTPUT:
1838                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1839                         break;
1840                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1841                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1842         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1843                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1844                         break;
1845                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1846                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1847         case V4L2_BUF_TYPE_SDR_CAPTURE:
1848                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1849                         break;
1850                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1851                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1852         case V4L2_BUF_TYPE_SDR_OUTPUT:
1853                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1854                         break;
1855                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1856                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1857         case V4L2_BUF_TYPE_META_CAPTURE:
1858                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1859                         break;
1860                 CLEAR_AFTER_FIELD(p, fmt.meta);
1861                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1862         case V4L2_BUF_TYPE_META_OUTPUT:
1863                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1864                         break;
1865                 CLEAR_AFTER_FIELD(p, fmt.meta);
1866                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1867         }
1868         return -EINVAL;
1869 }
1870
1871 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1872                                 struct file *file, void *fh, void *arg)
1873 {
1874         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1875 }
1876
1877 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1878                                 struct file *file, void *fh, void *arg)
1879 {
1880         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1881 }
1882
1883 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1884                                 struct file *file, void *fh, void *arg)
1885 {
1886         struct video_device *vfd = video_devdata(file);
1887         struct v4l2_tuner *p = arg;
1888         int err;
1889
1890         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1891                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1892         err = ops->vidioc_g_tuner(file, fh, p);
1893         if (!err)
1894                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1895         return err;
1896 }
1897
1898 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1899                                 struct file *file, void *fh, void *arg)
1900 {
1901         struct video_device *vfd = video_devdata(file);
1902         struct v4l2_tuner *p = arg;
1903         int ret;
1904
1905         ret = v4l_enable_media_source(vfd);
1906         if (ret)
1907                 return ret;
1908         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1909                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1910         return ops->vidioc_s_tuner(file, fh, p);
1911 }
1912
1913 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1914                                 struct file *file, void *fh, void *arg)
1915 {
1916         struct video_device *vfd = video_devdata(file);
1917         struct v4l2_modulator *p = arg;
1918         int err;
1919
1920         if (vfd->vfl_type == VFL_TYPE_RADIO)
1921                 p->type = V4L2_TUNER_RADIO;
1922
1923         err = ops->vidioc_g_modulator(file, fh, p);
1924         if (!err)
1925                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1926         return err;
1927 }
1928
1929 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1930                                 struct file *file, void *fh, void *arg)
1931 {
1932         struct video_device *vfd = video_devdata(file);
1933         struct v4l2_modulator *p = arg;
1934
1935         if (vfd->vfl_type == VFL_TYPE_RADIO)
1936                 p->type = V4L2_TUNER_RADIO;
1937
1938         return ops->vidioc_s_modulator(file, fh, p);
1939 }
1940
1941 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1942                                 struct file *file, void *fh, void *arg)
1943 {
1944         struct video_device *vfd = video_devdata(file);
1945         struct v4l2_frequency *p = arg;
1946
1947         if (vfd->vfl_type == VFL_TYPE_SDR)
1948                 p->type = V4L2_TUNER_SDR;
1949         else
1950                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1951                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1952         return ops->vidioc_g_frequency(file, fh, p);
1953 }
1954
1955 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1956                                 struct file *file, void *fh, void *arg)
1957 {
1958         struct video_device *vfd = video_devdata(file);
1959         const struct v4l2_frequency *p = arg;
1960         enum v4l2_tuner_type type;
1961         int ret;
1962
1963         ret = v4l_enable_media_source(vfd);
1964         if (ret)
1965                 return ret;
1966         if (vfd->vfl_type == VFL_TYPE_SDR) {
1967                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1968                         return -EINVAL;
1969         } else {
1970                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1971                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1972                 if (type != p->type)
1973                         return -EINVAL;
1974         }
1975         return ops->vidioc_s_frequency(file, fh, p);
1976 }
1977
1978 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1979                                 struct file *file, void *fh, void *arg)
1980 {
1981         struct video_device *vfd = video_devdata(file);
1982         struct v4l2_standard *p = arg;
1983
1984         return v4l_video_std_enumstd(p, vfd->tvnorms);
1985 }
1986
1987 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1988                                 struct file *file, void *fh, void *arg)
1989 {
1990         struct video_device *vfd = video_devdata(file);
1991         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1992         int ret;
1993
1994         ret = v4l_enable_media_source(vfd);
1995         if (ret)
1996                 return ret;
1997         norm = id & vfd->tvnorms;
1998         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1999                 return -EINVAL;
2000
2001         /* Calls the specific handler */
2002         return ops->vidioc_s_std(file, fh, norm);
2003 }
2004
2005 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008         struct video_device *vfd = video_devdata(file);
2009         v4l2_std_id *p = arg;
2010         int ret;
2011
2012         ret = v4l_enable_media_source(vfd);
2013         if (ret)
2014                 return ret;
2015         /*
2016          * If no signal is detected, then the driver should return
2017          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2018          * any standards that do not apply removed.
2019          *
2020          * This means that tuners, audio and video decoders can join
2021          * their efforts to improve the standards detection.
2022          */
2023         *p = vfd->tvnorms;
2024         return ops->vidioc_querystd(file, fh, arg);
2025 }
2026
2027 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2028                                 struct file *file, void *fh, void *arg)
2029 {
2030         struct video_device *vfd = video_devdata(file);
2031         struct v4l2_hw_freq_seek *p = arg;
2032         enum v4l2_tuner_type type;
2033         int ret;
2034
2035         ret = v4l_enable_media_source(vfd);
2036         if (ret)
2037                 return ret;
2038         /* s_hw_freq_seek is not supported for SDR for now */
2039         if (vfd->vfl_type == VFL_TYPE_SDR)
2040                 return -EINVAL;
2041
2042         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2043                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2044         if (p->type != type)
2045                 return -EINVAL;
2046         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2047 }
2048
2049 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2050                                 struct file *file, void *fh, void *arg)
2051 {
2052         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2053 }
2054
2055 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2056                                 struct file *file, void *fh, void *arg)
2057 {
2058         struct v4l2_requestbuffers *p = arg;
2059         int ret = check_fmt(file, p->type);
2060
2061         if (ret)
2062                 return ret;
2063
2064         CLEAR_AFTER_FIELD(p, capabilities);
2065
2066         return ops->vidioc_reqbufs(file, fh, p);
2067 }
2068
2069 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2070                                 struct file *file, void *fh, void *arg)
2071 {
2072         struct v4l2_buffer *p = arg;
2073         int ret = check_fmt(file, p->type);
2074
2075         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2076 }
2077
2078 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2079                                 struct file *file, void *fh, void *arg)
2080 {
2081         struct v4l2_buffer *p = arg;
2082         int ret = check_fmt(file, p->type);
2083
2084         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2085 }
2086
2087 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2088                                 struct file *file, void *fh, void *arg)
2089 {
2090         struct v4l2_buffer *p = arg;
2091         int ret = check_fmt(file, p->type);
2092
2093         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2094 }
2095
2096 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2097                                 struct file *file, void *fh, void *arg)
2098 {
2099         struct v4l2_create_buffers *create = arg;
2100         int ret = check_fmt(file, create->format.type);
2101
2102         if (ret)
2103                 return ret;
2104
2105         CLEAR_AFTER_FIELD(create, capabilities);
2106
2107         v4l_sanitize_format(&create->format);
2108
2109         ret = ops->vidioc_create_bufs(file, fh, create);
2110
2111         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2112             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2113                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2114
2115         return ret;
2116 }
2117
2118 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2119                                 struct file *file, void *fh, void *arg)
2120 {
2121         struct v4l2_buffer *b = arg;
2122         int ret = check_fmt(file, b->type);
2123
2124         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2125 }
2126
2127 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2128                                 struct file *file, void *fh, void *arg)
2129 {
2130         struct video_device *vfd = video_devdata(file);
2131         struct v4l2_streamparm *p = arg;
2132         v4l2_std_id std;
2133         int ret = check_fmt(file, p->type);
2134
2135         if (ret)
2136                 return ret;
2137         if (ops->vidioc_g_parm)
2138                 return ops->vidioc_g_parm(file, fh, p);
2139         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2140             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2141                 return -EINVAL;
2142         if (vfd->device_caps & V4L2_CAP_READWRITE)
2143                 p->parm.capture.readbuffers = 2;
2144         ret = ops->vidioc_g_std(file, fh, &std);
2145         if (ret == 0)
2146                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2147         return ret;
2148 }
2149
2150 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2151                                 struct file *file, void *fh, void *arg)
2152 {
2153         struct v4l2_streamparm *p = arg;
2154         int ret = check_fmt(file, p->type);
2155
2156         if (ret)
2157                 return ret;
2158
2159         /* Note: extendedmode is never used in drivers */
2160         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2161                 memset(p->parm.output.reserved, 0,
2162                        sizeof(p->parm.output.reserved));
2163                 p->parm.output.extendedmode = 0;
2164                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2165         } else {
2166                 memset(p->parm.capture.reserved, 0,
2167                        sizeof(p->parm.capture.reserved));
2168                 p->parm.capture.extendedmode = 0;
2169                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2170         }
2171         return ops->vidioc_s_parm(file, fh, p);
2172 }
2173
2174 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2175                                 struct file *file, void *fh, void *arg)
2176 {
2177         struct video_device *vfd = video_devdata(file);
2178         struct v4l2_queryctrl *p = arg;
2179         struct v4l2_fh *vfh =
2180                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2181
2182         if (vfh && vfh->ctrl_handler)
2183                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2184         if (vfd->ctrl_handler)
2185                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2186         if (ops->vidioc_queryctrl)
2187                 return ops->vidioc_queryctrl(file, fh, p);
2188         return -ENOTTY;
2189 }
2190
2191 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2192                                 struct file *file, void *fh, void *arg)
2193 {
2194         struct video_device *vfd = video_devdata(file);
2195         struct v4l2_query_ext_ctrl *p = arg;
2196         struct v4l2_fh *vfh =
2197                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2198
2199         if (vfh && vfh->ctrl_handler)
2200                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2201         if (vfd->ctrl_handler)
2202                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2203         if (ops->vidioc_query_ext_ctrl)
2204                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2205         return -ENOTTY;
2206 }
2207
2208 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2209                                 struct file *file, void *fh, void *arg)
2210 {
2211         struct video_device *vfd = video_devdata(file);
2212         struct v4l2_querymenu *p = arg;
2213         struct v4l2_fh *vfh =
2214                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2215
2216         if (vfh && vfh->ctrl_handler)
2217                 return v4l2_querymenu(vfh->ctrl_handler, p);
2218         if (vfd->ctrl_handler)
2219                 return v4l2_querymenu(vfd->ctrl_handler, p);
2220         if (ops->vidioc_querymenu)
2221                 return ops->vidioc_querymenu(file, fh, p);
2222         return -ENOTTY;
2223 }
2224
2225 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2226                                 struct file *file, void *fh, void *arg)
2227 {
2228         struct video_device *vfd = video_devdata(file);
2229         struct v4l2_control *p = arg;
2230         struct v4l2_fh *vfh =
2231                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2232         struct v4l2_ext_controls ctrls;
2233         struct v4l2_ext_control ctrl;
2234
2235         if (vfh && vfh->ctrl_handler)
2236                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2237         if (vfd->ctrl_handler)
2238                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2239         if (ops->vidioc_g_ctrl)
2240                 return ops->vidioc_g_ctrl(file, fh, p);
2241         if (ops->vidioc_g_ext_ctrls == NULL)
2242                 return -ENOTTY;
2243
2244         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2245         ctrls.count = 1;
2246         ctrls.controls = &ctrl;
2247         ctrl.id = p->id;
2248         ctrl.value = p->value;
2249         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2250                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2251
2252                 if (ret == 0)
2253                         p->value = ctrl.value;
2254                 return ret;
2255         }
2256         return -EINVAL;
2257 }
2258
2259 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2260                                 struct file *file, void *fh, void *arg)
2261 {
2262         struct video_device *vfd = video_devdata(file);
2263         struct v4l2_control *p = arg;
2264         struct v4l2_fh *vfh =
2265                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2266         struct v4l2_ext_controls ctrls;
2267         struct v4l2_ext_control ctrl;
2268         int ret;
2269
2270         if (vfh && vfh->ctrl_handler)
2271                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2272         if (vfd->ctrl_handler)
2273                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2274         if (ops->vidioc_s_ctrl)
2275                 return ops->vidioc_s_ctrl(file, fh, p);
2276         if (ops->vidioc_s_ext_ctrls == NULL)
2277                 return -ENOTTY;
2278
2279         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2280         ctrls.count = 1;
2281         ctrls.controls = &ctrl;
2282         ctrl.id = p->id;
2283         ctrl.value = p->value;
2284         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2285                 return -EINVAL;
2286         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2287         p->value = ctrl.value;
2288         return ret;
2289 }
2290
2291 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2292                                 struct file *file, void *fh, void *arg)
2293 {
2294         struct video_device *vfd = video_devdata(file);
2295         struct v4l2_ext_controls *p = arg;
2296         struct v4l2_fh *vfh =
2297                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2298
2299         p->error_idx = p->count;
2300         if (vfh && vfh->ctrl_handler)
2301                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2302                                         vfd, vfd->v4l2_dev->mdev, p);
2303         if (vfd->ctrl_handler)
2304                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2305                                         vfd, vfd->v4l2_dev->mdev, p);
2306         if (ops->vidioc_g_ext_ctrls == NULL)
2307                 return -ENOTTY;
2308         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2309                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2310 }
2311
2312 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2313                                 struct file *file, void *fh, void *arg)
2314 {
2315         struct video_device *vfd = video_devdata(file);
2316         struct v4l2_ext_controls *p = arg;
2317         struct v4l2_fh *vfh =
2318                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2319
2320         p->error_idx = p->count;
2321         if (vfh && vfh->ctrl_handler)
2322                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2323                                         vfd, vfd->v4l2_dev->mdev, p);
2324         if (vfd->ctrl_handler)
2325                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2326                                         vfd, vfd->v4l2_dev->mdev, p);
2327         if (ops->vidioc_s_ext_ctrls == NULL)
2328                 return -ENOTTY;
2329         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2330                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2331 }
2332
2333 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2334                                 struct file *file, void *fh, void *arg)
2335 {
2336         struct video_device *vfd = video_devdata(file);
2337         struct v4l2_ext_controls *p = arg;
2338         struct v4l2_fh *vfh =
2339                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2340
2341         p->error_idx = p->count;
2342         if (vfh && vfh->ctrl_handler)
2343                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2344                                           vfd, vfd->v4l2_dev->mdev, p);
2345         if (vfd->ctrl_handler)
2346                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2347                                           vfd, vfd->v4l2_dev->mdev, p);
2348         if (ops->vidioc_try_ext_ctrls == NULL)
2349                 return -ENOTTY;
2350         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2351                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2352 }
2353
2354 /*
2355  * The selection API specified originally that the _MPLANE buffer types
2356  * shouldn't be used. The reasons for this are lost in the mists of time
2357  * (or just really crappy memories). Regardless, this is really annoying
2358  * for userspace. So to keep things simple we map _MPLANE buffer types
2359  * to their 'regular' counterparts before calling the driver. And we
2360  * restore it afterwards. This way applications can use either buffer
2361  * type and drivers don't need to check for both.
2362  */
2363 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2364                            struct file *file, void *fh, void *arg)
2365 {
2366         struct v4l2_selection *p = arg;
2367         u32 old_type = p->type;
2368         int ret;
2369
2370         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2371                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2372         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2373                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2374         ret = ops->vidioc_g_selection(file, fh, p);
2375         p->type = old_type;
2376         return ret;
2377 }
2378
2379 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2380                            struct file *file, void *fh, void *arg)
2381 {
2382         struct v4l2_selection *p = arg;
2383         u32 old_type = p->type;
2384         int ret;
2385
2386         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2387                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2388         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2389                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2390         ret = ops->vidioc_s_selection(file, fh, p);
2391         p->type = old_type;
2392         return ret;
2393 }
2394
2395 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2396                                 struct file *file, void *fh, void *arg)
2397 {
2398         struct video_device *vfd = video_devdata(file);
2399         struct v4l2_crop *p = arg;
2400         struct v4l2_selection s = {
2401                 .type = p->type,
2402         };
2403         int ret;
2404
2405         /* simulate capture crop using selection api */
2406
2407         /* crop means compose for output devices */
2408         if (V4L2_TYPE_IS_OUTPUT(p->type))
2409                 s.target = V4L2_SEL_TGT_COMPOSE;
2410         else
2411                 s.target = V4L2_SEL_TGT_CROP;
2412
2413         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2414                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2415                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2416
2417         ret = v4l_g_selection(ops, file, fh, &s);
2418
2419         /* copying results to old structure on success */
2420         if (!ret)
2421                 p->c = s.r;
2422         return ret;
2423 }
2424
2425 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2426                                 struct file *file, void *fh, void *arg)
2427 {
2428         struct video_device *vfd = video_devdata(file);
2429         struct v4l2_crop *p = arg;
2430         struct v4l2_selection s = {
2431                 .type = p->type,
2432                 .r = p->c,
2433         };
2434
2435         /* simulate capture crop using selection api */
2436
2437         /* crop means compose for output devices */
2438         if (V4L2_TYPE_IS_OUTPUT(p->type))
2439                 s.target = V4L2_SEL_TGT_COMPOSE;
2440         else
2441                 s.target = V4L2_SEL_TGT_CROP;
2442
2443         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2444                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2445                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2446
2447         return v4l_s_selection(ops, file, fh, &s);
2448 }
2449
2450 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2451                                 struct file *file, void *fh, void *arg)
2452 {
2453         struct video_device *vfd = video_devdata(file);
2454         struct v4l2_cropcap *p = arg;
2455         struct v4l2_selection s = { .type = p->type };
2456         int ret = 0;
2457
2458         /* setting trivial pixelaspect */
2459         p->pixelaspect.numerator = 1;
2460         p->pixelaspect.denominator = 1;
2461
2462         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2463                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2464         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2465                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2466
2467         /*
2468          * The determine_valid_ioctls() call already should ensure
2469          * that this can never happen, but just in case...
2470          */
2471         if (WARN_ON(!ops->vidioc_g_selection))
2472                 return -ENOTTY;
2473
2474         if (ops->vidioc_g_pixelaspect)
2475                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2476                                                 &p->pixelaspect);
2477
2478         /*
2479          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2480          * square pixel aspect ratio in that case.
2481          */
2482         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2483                 return ret;
2484
2485         /* Use g_selection() to fill in the bounds and defrect rectangles */
2486
2487         /* obtaining bounds */
2488         if (V4L2_TYPE_IS_OUTPUT(p->type))
2489                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2490         else
2491                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2492
2493         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2494                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2495                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2496
2497         ret = v4l_g_selection(ops, file, fh, &s);
2498         if (ret)
2499                 return ret;
2500         p->bounds = s.r;
2501
2502         /* obtaining defrect */
2503         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2504                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2505         else
2506                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2507
2508         ret = v4l_g_selection(ops, file, fh, &s);
2509         if (ret)
2510                 return ret;
2511         p->defrect = s.r;
2512
2513         return 0;
2514 }
2515
2516 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2517                                 struct file *file, void *fh, void *arg)
2518 {
2519         struct video_device *vfd = video_devdata(file);
2520         int ret;
2521
2522         if (vfd->v4l2_dev)
2523                 pr_info("%s: =================  START STATUS  =================\n",
2524                         vfd->v4l2_dev->name);
2525         ret = ops->vidioc_log_status(file, fh);
2526         if (vfd->v4l2_dev)
2527                 pr_info("%s: ==================  END STATUS  ==================\n",
2528                         vfd->v4l2_dev->name);
2529         return ret;
2530 }
2531
2532 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2533                                 struct file *file, void *fh, void *arg)
2534 {
2535 #ifdef CONFIG_VIDEO_ADV_DEBUG
2536         struct v4l2_dbg_register *p = arg;
2537         struct video_device *vfd = video_devdata(file);
2538         struct v4l2_subdev *sd;
2539         int idx = 0;
2540
2541         if (!capable(CAP_SYS_ADMIN))
2542                 return -EPERM;
2543         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2544                 if (vfd->v4l2_dev == NULL)
2545                         return -EINVAL;
2546                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2547                         if (p->match.addr == idx++)
2548                                 return v4l2_subdev_call(sd, core, g_register, p);
2549                 return -EINVAL;
2550         }
2551         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2552             (ops->vidioc_g_chip_info || p->match.addr == 0))
2553                 return ops->vidioc_g_register(file, fh, p);
2554         return -EINVAL;
2555 #else
2556         return -ENOTTY;
2557 #endif
2558 }
2559
2560 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2561                                 struct file *file, void *fh, void *arg)
2562 {
2563 #ifdef CONFIG_VIDEO_ADV_DEBUG
2564         const struct v4l2_dbg_register *p = arg;
2565         struct video_device *vfd = video_devdata(file);
2566         struct v4l2_subdev *sd;
2567         int idx = 0;
2568
2569         if (!capable(CAP_SYS_ADMIN))
2570                 return -EPERM;
2571         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2572                 if (vfd->v4l2_dev == NULL)
2573                         return -EINVAL;
2574                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2575                         if (p->match.addr == idx++)
2576                                 return v4l2_subdev_call(sd, core, s_register, p);
2577                 return -EINVAL;
2578         }
2579         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2580             (ops->vidioc_g_chip_info || p->match.addr == 0))
2581                 return ops->vidioc_s_register(file, fh, p);
2582         return -EINVAL;
2583 #else
2584         return -ENOTTY;
2585 #endif
2586 }
2587
2588 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2589                                 struct file *file, void *fh, void *arg)
2590 {
2591 #ifdef CONFIG_VIDEO_ADV_DEBUG
2592         struct video_device *vfd = video_devdata(file);
2593         struct v4l2_dbg_chip_info *p = arg;
2594         struct v4l2_subdev *sd;
2595         int idx = 0;
2596
2597         switch (p->match.type) {
2598         case V4L2_CHIP_MATCH_BRIDGE:
2599                 if (ops->vidioc_s_register)
2600                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2601                 if (ops->vidioc_g_register)
2602                         p->flags |= V4L2_CHIP_FL_READABLE;
2603                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2604                 if (ops->vidioc_g_chip_info)
2605                         return ops->vidioc_g_chip_info(file, fh, arg);
2606                 if (p->match.addr)
2607                         return -EINVAL;
2608                 return 0;
2609
2610         case V4L2_CHIP_MATCH_SUBDEV:
2611                 if (vfd->v4l2_dev == NULL)
2612                         break;
2613                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2614                         if (p->match.addr != idx++)
2615                                 continue;
2616                         if (sd->ops->core && sd->ops->core->s_register)
2617                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2618                         if (sd->ops->core && sd->ops->core->g_register)
2619                                 p->flags |= V4L2_CHIP_FL_READABLE;
2620                         strscpy(p->name, sd->name, sizeof(p->name));
2621                         return 0;
2622                 }
2623                 break;
2624         }
2625         return -EINVAL;
2626 #else
2627         return -ENOTTY;
2628 #endif
2629 }
2630
2631 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2632                                 struct file *file, void *fh, void *arg)
2633 {
2634         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2635 }
2636
2637 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2638                                 struct file *file, void *fh, void *arg)
2639 {
2640         return ops->vidioc_subscribe_event(fh, arg);
2641 }
2642
2643 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2644                                 struct file *file, void *fh, void *arg)
2645 {
2646         return ops->vidioc_unsubscribe_event(fh, arg);
2647 }
2648
2649 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2650                                 struct file *file, void *fh, void *arg)
2651 {
2652         struct v4l2_sliced_vbi_cap *p = arg;
2653         int ret = check_fmt(file, p->type);
2654
2655         if (ret)
2656                 return ret;
2657
2658         /* Clear up to type, everything after type is zeroed already */
2659         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2660
2661         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2662 }
2663
2664 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2665                                 struct file *file, void *fh, void *arg)
2666 {
2667         struct video_device *vfd = video_devdata(file);
2668         struct v4l2_frequency_band *p = arg;
2669         enum v4l2_tuner_type type;
2670         int err;
2671
2672         if (vfd->vfl_type == VFL_TYPE_SDR) {
2673                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2674                         return -EINVAL;
2675                 type = p->type;
2676         } else {
2677                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2678                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2679                 if (type != p->type)
2680                         return -EINVAL;
2681         }
2682         if (ops->vidioc_enum_freq_bands) {
2683                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2684                 if (err != -ENOTTY)
2685                         return err;
2686         }
2687         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2688                 struct v4l2_tuner t = {
2689                         .index = p->tuner,
2690                         .type = type,
2691                 };
2692
2693                 if (p->index)
2694                         return -EINVAL;
2695                 err = ops->vidioc_g_tuner(file, fh, &t);
2696                 if (err)
2697                         return err;
2698                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2699                 p->rangelow = t.rangelow;
2700                 p->rangehigh = t.rangehigh;
2701                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2702                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2703                 return 0;
2704         }
2705         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2706                 struct v4l2_modulator m = {
2707                         .index = p->tuner,
2708                 };
2709
2710                 if (type != V4L2_TUNER_RADIO)
2711                         return -EINVAL;
2712                 if (p->index)
2713                         return -EINVAL;
2714                 err = ops->vidioc_g_modulator(file, fh, &m);
2715                 if (err)
2716                         return err;
2717                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2718                 p->rangelow = m.rangelow;
2719                 p->rangehigh = m.rangehigh;
2720                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2721                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2722                 return 0;
2723         }
2724         return -ENOTTY;
2725 }
2726
2727 struct v4l2_ioctl_info {
2728         unsigned int ioctl;
2729         u32 flags;
2730         const char * const name;
2731         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2732                     void *fh, void *p);
2733         void (*debug)(const void *arg, bool write_only);
2734 };
2735
2736 /* This control needs a priority check */
2737 #define INFO_FL_PRIO            (1 << 0)
2738 /* This control can be valid if the filehandle passes a control handler. */
2739 #define INFO_FL_CTRL            (1 << 1)
2740 /* Queuing ioctl */
2741 #define INFO_FL_QUEUE           (1 << 2)
2742 /* Always copy back result, even on error */
2743 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2744 /* Zero struct from after the field to the end */
2745 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2746         ((offsetof(struct v4l2_struct, field) +                 \
2747           sizeof_field(struct v4l2_struct, field)) << 16)
2748 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2749
2750 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2751         static int v4l_stub_ ## _vidioc(                        \
2752                         const struct v4l2_ioctl_ops *ops,       \
2753                         struct file *file, void *fh, void *p)   \
2754         {                                                       \
2755                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2756         }
2757
2758 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2759         [_IOC_NR(_ioctl)] = {                                   \
2760                 .ioctl = _ioctl,                                \
2761                 .flags = _flags,                                \
2762                 .name = #_ioctl,                                \
2763                 .func = _func,                                  \
2764                 .debug = _debug,                                \
2765         }
2766
2767 DEFINE_V4L_STUB_FUNC(g_fbuf)
2768 DEFINE_V4L_STUB_FUNC(s_fbuf)
2769 DEFINE_V4L_STUB_FUNC(expbuf)
2770 DEFINE_V4L_STUB_FUNC(g_std)
2771 DEFINE_V4L_STUB_FUNC(g_audio)
2772 DEFINE_V4L_STUB_FUNC(s_audio)
2773 DEFINE_V4L_STUB_FUNC(g_edid)
2774 DEFINE_V4L_STUB_FUNC(s_edid)
2775 DEFINE_V4L_STUB_FUNC(g_audout)
2776 DEFINE_V4L_STUB_FUNC(s_audout)
2777 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2778 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2779 DEFINE_V4L_STUB_FUNC(enumaudio)
2780 DEFINE_V4L_STUB_FUNC(enumaudout)
2781 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2782 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2783 DEFINE_V4L_STUB_FUNC(g_enc_index)
2784 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2785 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2786 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2787 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2788 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2789 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2790 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2791 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2792 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2793
2794 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2795         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2796         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2797         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2798         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2799         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2800         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2801         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2802         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2803         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2804         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2805         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2806         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2807         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2808         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2809         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2810         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2811         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2812         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2813         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2814         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2815         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2816         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2817         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2818         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2819         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2820         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2821         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2822         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2823         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2824         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2825         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2826         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2827         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2828         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2829         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2830         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2831         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2832         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2833         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2834         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2835         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2836         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2837         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2838         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2839         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2840         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2841         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2842         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2843         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2844         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2845         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2846         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2847         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2848         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2849         IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2850         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2851         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2852         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2853         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2854         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2855         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2856         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2857         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2858         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2859         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2860         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2861         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2862         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2863         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2864         IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2865         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2866         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2867         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2868         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2869         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2870         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2871         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2872         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2873         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2874         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2875         IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2876         IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2877 };
2878 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2879
2880 static bool v4l2_is_known_ioctl(unsigned int cmd)
2881 {
2882         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2883                 return false;
2884         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2885 }
2886
2887 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2888                                          struct v4l2_fh *vfh, unsigned int cmd,
2889                                          void *arg)
2890 {
2891         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2892                 return vdev->lock;
2893         if (vfh && vfh->m2m_ctx &&
2894             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2895                 if (vfh->m2m_ctx->q_lock)
2896                         return vfh->m2m_ctx->q_lock;
2897         }
2898         if (vdev->queue && vdev->queue->lock &&
2899                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2900                 return vdev->queue->lock;
2901         return vdev->lock;
2902 }
2903
2904 /* Common ioctl debug function. This function can be used by
2905    external ioctl messages as well as internal V4L ioctl */
2906 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2907 {
2908         const char *dir, *type;
2909
2910         if (prefix)
2911                 printk(KERN_DEBUG "%s: ", prefix);
2912
2913         switch (_IOC_TYPE(cmd)) {
2914         case 'd':
2915                 type = "v4l2_int";
2916                 break;
2917         case 'V':
2918                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2919                         type = "v4l2";
2920                         break;
2921                 }
2922                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2923                 return;
2924         default:
2925                 type = "unknown";
2926                 break;
2927         }
2928
2929         switch (_IOC_DIR(cmd)) {
2930         case _IOC_NONE:              dir = "--"; break;
2931         case _IOC_READ:              dir = "r-"; break;
2932         case _IOC_WRITE:             dir = "-w"; break;
2933         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2934         default:                     dir = "*ERR*"; break;
2935         }
2936         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2937                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2938 }
2939 EXPORT_SYMBOL(v4l_printk_ioctl);
2940
2941 static long __video_do_ioctl(struct file *file,
2942                 unsigned int cmd, void *arg)
2943 {
2944         struct video_device *vfd = video_devdata(file);
2945         struct mutex *req_queue_lock = NULL;
2946         struct mutex *lock; /* ioctl serialization mutex */
2947         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2948         bool write_only = false;
2949         struct v4l2_ioctl_info default_info;
2950         const struct v4l2_ioctl_info *info;
2951         void *fh = file->private_data;
2952         struct v4l2_fh *vfh = NULL;
2953         int dev_debug = vfd->dev_debug;
2954         long ret = -ENOTTY;
2955
2956         if (ops == NULL) {
2957                 pr_warn("%s: has no ioctl_ops.\n",
2958                                 video_device_node_name(vfd));
2959                 return ret;
2960         }
2961
2962         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2963                 vfh = file->private_data;
2964
2965         /*
2966          * We need to serialize streamon/off with queueing new requests.
2967          * These ioctls may trigger the cancellation of a streaming
2968          * operation, and that should not be mixed with queueing a new
2969          * request at the same time.
2970          */
2971         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2972             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2973                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2974
2975                 if (mutex_lock_interruptible(req_queue_lock))
2976                         return -ERESTARTSYS;
2977         }
2978
2979         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2980
2981         if (lock && mutex_lock_interruptible(lock)) {
2982                 if (req_queue_lock)
2983                         mutex_unlock(req_queue_lock);
2984                 return -ERESTARTSYS;
2985         }
2986
2987         if (!video_is_registered(vfd)) {
2988                 ret = -ENODEV;
2989                 goto unlock;
2990         }
2991
2992         if (v4l2_is_known_ioctl(cmd)) {
2993                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2994
2995                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2996                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2997                         goto done;
2998
2999                 if (vfh && (info->flags & INFO_FL_PRIO)) {
3000                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
3001                         if (ret)
3002                                 goto done;
3003                 }
3004         } else {
3005                 default_info.ioctl = cmd;
3006                 default_info.flags = 0;
3007                 default_info.debug = v4l_print_default;
3008                 info = &default_info;
3009         }
3010
3011         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3012         if (info != &default_info) {
3013                 ret = info->func(ops, file, fh, arg);
3014         } else if (!ops->vidioc_default) {
3015                 ret = -ENOTTY;
3016         } else {
3017                 ret = ops->vidioc_default(file, fh,
3018                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3019                         cmd, arg);
3020         }
3021
3022 done:
3023         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3024                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3025                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3026                         goto unlock;
3027
3028                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3029                 if (ret < 0)
3030                         pr_cont(": error %ld", ret);
3031                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3032                         pr_cont("\n");
3033                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3034                         info->debug(arg, write_only);
3035                 else {
3036                         pr_cont(": ");
3037                         info->debug(arg, write_only);
3038                 }
3039         }
3040
3041 unlock:
3042         if (lock)
3043                 mutex_unlock(lock);
3044         if (req_queue_lock)
3045                 mutex_unlock(req_queue_lock);
3046         return ret;
3047 }
3048
3049 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3050                             void __user **user_ptr, void ***kernel_ptr)
3051 {
3052         int ret = 0;
3053
3054         switch (cmd) {
3055         case VIDIOC_PREPARE_BUF:
3056         case VIDIOC_QUERYBUF:
3057         case VIDIOC_QBUF:
3058         case VIDIOC_DQBUF: {
3059                 struct v4l2_buffer *buf = parg;
3060
3061                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3062                         if (buf->length > VIDEO_MAX_PLANES) {
3063                                 ret = -EINVAL;
3064                                 break;
3065                         }
3066                         *user_ptr = (void __user *)buf->m.planes;
3067                         *kernel_ptr = (void **)&buf->m.planes;
3068                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3069                         ret = 1;
3070                 }
3071                 break;
3072         }
3073
3074         case VIDIOC_G_EDID:
3075         case VIDIOC_S_EDID: {
3076                 struct v4l2_edid *edid = parg;
3077
3078                 if (edid->blocks) {
3079                         if (edid->blocks > 256) {
3080                                 ret = -EINVAL;
3081                                 break;
3082                         }
3083                         *user_ptr = (void __user *)edid->edid;
3084                         *kernel_ptr = (void **)&edid->edid;
3085                         *array_size = edid->blocks * 128;
3086                         ret = 1;
3087                 }
3088                 break;
3089         }
3090
3091         case VIDIOC_S_EXT_CTRLS:
3092         case VIDIOC_G_EXT_CTRLS:
3093         case VIDIOC_TRY_EXT_CTRLS: {
3094                 struct v4l2_ext_controls *ctrls = parg;
3095
3096                 if (ctrls->count != 0) {
3097                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3098                                 ret = -EINVAL;
3099                                 break;
3100                         }
3101                         *user_ptr = (void __user *)ctrls->controls;
3102                         *kernel_ptr = (void **)&ctrls->controls;
3103                         *array_size = sizeof(struct v4l2_ext_control)
3104                                     * ctrls->count;
3105                         ret = 1;
3106                 }
3107                 break;
3108         }
3109         }
3110
3111         return ret;
3112 }
3113
3114 static unsigned int video_translate_cmd(unsigned int cmd)
3115 {
3116         switch (cmd) {
3117 #ifdef CONFIG_COMPAT_32BIT_TIME
3118         case VIDIOC_DQEVENT_TIME32:
3119                 return VIDIOC_DQEVENT;
3120         case VIDIOC_QUERYBUF_TIME32:
3121                 return VIDIOC_QUERYBUF;
3122         case VIDIOC_QBUF_TIME32:
3123                 return VIDIOC_QBUF;
3124         case VIDIOC_DQBUF_TIME32:
3125                 return VIDIOC_DQBUF;
3126         case VIDIOC_PREPARE_BUF_TIME32:
3127                 return VIDIOC_PREPARE_BUF;
3128 #endif
3129         }
3130
3131         return cmd;
3132 }
3133
3134 static int video_get_user(void __user *arg, void *parg, unsigned int cmd,
3135                           bool *always_copy)
3136 {
3137         unsigned int n = _IOC_SIZE(cmd);
3138
3139         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3140                 /* read-only ioctl */
3141                 memset(parg, 0, n);
3142                 return 0;
3143         }
3144
3145         switch (cmd) {
3146 #ifdef CONFIG_COMPAT_32BIT_TIME
3147         case VIDIOC_QUERYBUF_TIME32:
3148         case VIDIOC_QBUF_TIME32:
3149         case VIDIOC_DQBUF_TIME32:
3150         case VIDIOC_PREPARE_BUF_TIME32: {
3151                 struct v4l2_buffer_time32 vb32;
3152                 struct v4l2_buffer *vb = parg;
3153
3154                 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3155                         return -EFAULT;
3156
3157                 *vb = (struct v4l2_buffer) {
3158                         .index          = vb32.index,
3159                         .type           = vb32.type,
3160                         .bytesused      = vb32.bytesused,
3161                         .flags          = vb32.flags,
3162                         .field          = vb32.field,
3163                         .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3164                         .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3165                         .timecode       = vb32.timecode,
3166                         .sequence       = vb32.sequence,
3167                         .memory         = vb32.memory,
3168                         .m.userptr      = vb32.m.userptr,
3169                         .length         = vb32.length,
3170                         .request_fd     = vb32.request_fd,
3171                 };
3172
3173                 if (cmd == VIDIOC_QUERYBUF_TIME32)
3174                         vb->request_fd = 0;
3175
3176                 break;
3177         }
3178 #endif
3179         default:
3180                 /*
3181                  * In some cases, only a few fields are used as input,
3182                  * i.e. when the app sets "index" and then the driver
3183                  * fills in the rest of the structure for the thing
3184                  * with that index.  We only need to copy up the first
3185                  * non-input field.
3186                  */
3187                 if (v4l2_is_known_ioctl(cmd)) {
3188                         u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3189
3190                         if (flags & INFO_FL_CLEAR_MASK)
3191                                 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3192                         *always_copy = flags & INFO_FL_ALWAYS_COPY;
3193                 }
3194
3195                 if (copy_from_user(parg, (void __user *)arg, n))
3196                         return -EFAULT;
3197
3198                 /* zero out anything we don't copy from userspace */
3199                 if (n < _IOC_SIZE(cmd))
3200                         memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
3201                 break;
3202         }
3203
3204         return 0;
3205 }
3206
3207 static int video_put_user(void __user *arg, void *parg, unsigned int cmd)
3208 {
3209         if (!(_IOC_DIR(cmd) & _IOC_READ))
3210                 return 0;
3211
3212         switch (cmd) {
3213 #ifdef CONFIG_COMPAT_32BIT_TIME
3214         case VIDIOC_DQEVENT_TIME32: {
3215                 struct v4l2_event *ev = parg;
3216                 struct v4l2_event_time32 ev32;
3217
3218                 memset(&ev32, 0, sizeof(ev32));
3219
3220                 ev32.type       = ev->type;
3221                 ev32.pending    = ev->pending;
3222                 ev32.sequence   = ev->sequence;
3223                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3224                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3225                 ev32.id         = ev->id;
3226
3227                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3228                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3229
3230                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3231                         return -EFAULT;
3232                 break;
3233         }
3234         case VIDIOC_QUERYBUF_TIME32:
3235         case VIDIOC_QBUF_TIME32:
3236         case VIDIOC_DQBUF_TIME32:
3237         case VIDIOC_PREPARE_BUF_TIME32: {
3238                 struct v4l2_buffer *vb = parg;
3239                 struct v4l2_buffer_time32 vb32;
3240
3241                 memset(&vb32, 0, sizeof(vb32));
3242
3243                 vb32.index      = vb->index;
3244                 vb32.type       = vb->type;
3245                 vb32.bytesused  = vb->bytesused;
3246                 vb32.flags      = vb->flags;
3247                 vb32.field      = vb->field;
3248                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3249                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3250                 vb32.timecode   = vb->timecode;
3251                 vb32.sequence   = vb->sequence;
3252                 vb32.memory     = vb->memory;
3253                 vb32.m.userptr  = vb->m.userptr;
3254                 vb32.length     = vb->length;
3255                 vb32.request_fd = vb->request_fd;
3256
3257                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3258                         return -EFAULT;
3259                 break;
3260         }
3261 #endif
3262         default:
3263                 /*  Copy results into user buffer  */
3264                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3265                         return -EFAULT;
3266                 break;
3267         }
3268
3269         return 0;
3270 }
3271
3272 long
3273 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3274                v4l2_kioctl func)
3275 {
3276         char    sbuf[128];
3277         void    *mbuf = NULL, *array_buf = NULL;
3278         void    *parg = (void *)arg;
3279         long    err  = -EINVAL;
3280         bool    has_array_args;
3281         bool    always_copy = false;
3282         size_t  array_size = 0;
3283         void __user *user_ptr = NULL;
3284         void    **kernel_ptr = NULL;
3285         unsigned int cmd = video_translate_cmd(orig_cmd);
3286         const size_t ioc_size = _IOC_SIZE(cmd);
3287
3288         /*  Copy arguments into temp kernel buffer  */
3289         if (_IOC_DIR(cmd) != _IOC_NONE) {
3290                 if (ioc_size <= sizeof(sbuf)) {
3291                         parg = sbuf;
3292                 } else {
3293                         /* too big to allocate from stack */
3294                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3295                         if (NULL == mbuf)
3296                                 return -ENOMEM;
3297                         parg = mbuf;
3298                 }
3299
3300                 err = video_get_user((void __user *)arg, parg, orig_cmd,
3301                                      &always_copy);
3302                 if (err)
3303                         goto out;
3304         }
3305
3306         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3307         if (err < 0)
3308                 goto out;
3309         has_array_args = err;
3310
3311         if (has_array_args) {
3312                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3313                 err = -ENOMEM;
3314                 if (array_buf == NULL)
3315                         goto out_array_args;
3316                 err = -EFAULT;
3317                 if (copy_from_user(array_buf, user_ptr, array_size))
3318                         goto out_array_args;
3319                 *kernel_ptr = array_buf;
3320         }
3321
3322         /* Handles IOCTL */
3323         err = func(file, cmd, parg);
3324         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3325                 err = -ENOTTY;
3326                 goto out;
3327         }
3328
3329         if (err == 0) {
3330                 if (cmd == VIDIOC_DQBUF)
3331                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3332                 else if (cmd == VIDIOC_QBUF)
3333                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3334         }
3335
3336         if (has_array_args) {
3337                 *kernel_ptr = (void __force *)user_ptr;
3338                 if (copy_to_user(user_ptr, array_buf, array_size))
3339                         err = -EFAULT;
3340                 goto out_array_args;
3341         }
3342         /*
3343          * Some ioctls can return an error, but still have valid
3344          * results that must be returned.
3345          */
3346         if (err < 0 && !always_copy)
3347                 goto out;
3348
3349 out_array_args:
3350         if (video_put_user((void __user *)arg, parg, orig_cmd))
3351                 err = -EFAULT;
3352 out:
3353         kvfree(array_buf);
3354         kvfree(mbuf);
3355         return err;
3356 }
3357
3358 long video_ioctl2(struct file *file,
3359                unsigned int cmd, unsigned long arg)
3360 {
3361         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3362 }
3363 EXPORT_SYMBOL(video_ioctl2);