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                 /* fall through */
 786         default:
 787                 pr_cont("\n");
 788                 break;
 789         }
 790 }
 791
 792 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 793 {
 794         const struct v4l2_frmivalenum *p = arg;
 795
 796         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 797                         p->index,
 798                         (p->pixel_format & 0xff),
 799                         (p->pixel_format >>  8) & 0xff,
 800                         (p->pixel_format >> 16) & 0xff,
 801                         (p->pixel_format >> 24) & 0xff,
 802                         p->width, p->height, p->type);
 803         switch (p->type) {
 804         case V4L2_FRMIVAL_TYPE_DISCRETE:
 805                 pr_cont(", fps=%d/%d\n",
 806                                 p->discrete.numerator,
 807                                 p->discrete.denominator);
 808                 break;
 809         case V4L2_FRMIVAL_TYPE_STEPWISE:
 810                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 811                                 p->stepwise.min.numerator,
 812                                 p->stepwise.min.denominator,
 813                                 p->stepwise.max.numerator,
 814                                 p->stepwise.max.denominator,
 815                                 p->stepwise.step.numerator,
 816                                 p->stepwise.step.denominator);
 817                 break;
 818         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 819                 /* fall through */
 820         default:
 821                 pr_cont("\n");
 822                 break;
 823         }
 824 }
 825
 826 static void v4l_print_event(const void *arg, bool write_only)
 827 {
 828         const struct v4l2_event *p = arg;
 829         const struct v4l2_event_ctrl *c;
 830
 831         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 832                         p->type, p->pending, p->sequence, p->id,
 833                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 834         switch (p->type) {
 835         case V4L2_EVENT_VSYNC:
 836                 printk(KERN_DEBUG "field=%s\n",
 837                         prt_names(p->u.vsync.field, v4l2_field_names));
 838                 break;
 839         case V4L2_EVENT_CTRL:
 840                 c = &p->u.ctrl;
 841                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 842                         c->changes, c->type);
 843                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 844                         pr_cont("value64=%lld, ", c->value64);
 845                 else
 846                         pr_cont("value=%d, ", c->value);
 847                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 848                         c->flags, c->minimum, c->maximum,
 849                         c->step, c->default_value);
 850                 break;
 851         case V4L2_EVENT_FRAME_SYNC:
 852                 pr_cont("frame_sequence=%u\n",
 853                         p->u.frame_sync.frame_sequence);
 854                 break;
 855         }
 856 }
 857
 858 static void v4l_print_event_subscription(const void *arg, bool write_only)
 859 {
 860         const struct v4l2_event_subscription *p = arg;
 861
 862         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 863                         p->type, p->id, p->flags);
 864 }
 865
 866 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 867 {
 868         const struct v4l2_sliced_vbi_cap *p = arg;
 869         int i;
 870
 871         pr_cont("type=%s, service_set=0x%08x\n",
 872                         prt_names(p->type, v4l2_type_names), p->service_set);
 873         for (i = 0; i < 24; i++)
 874                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 875                                 p->service_lines[0][i],
 876                                 p->service_lines[1][i]);
 877 }
 878
 879 static void v4l_print_freq_band(const void *arg, bool write_only)
 880 {
 881         const struct v4l2_frequency_band *p = arg;
 882
 883         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 884                         p->tuner, p->type, p->index,
 885                         p->capability, p->rangelow,
 886                         p->rangehigh, p->modulation);
 887 }
 888
 889 static void v4l_print_edid(const void *arg, bool write_only)
 890 {
 891         const struct v4l2_edid *p = arg;
 892
 893         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 894                 p->pad, p->start_block, p->blocks);
 895 }
 896
 897 static void v4l_print_u32(const void *arg, bool write_only)
 898 {
 899         pr_cont("value=%u\n", *(const u32 *)arg);
 900 }
 901
 902 static void v4l_print_newline(const void *arg, bool write_only)
 903 {
 904         pr_cont("\n");
 905 }
 906
 907 static void v4l_print_default(const void *arg, bool write_only)
 908 {
 909         pr_cont("driver-specific ioctl\n");
 910 }
 911
 912 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 913 {
 914         __u32 i;
 915
 916         /* zero the reserved fields */
 917         c->reserved[0] = 0;
 918         for (i = 0; i < c->count; i++)
 919                 c->controls[i].reserved2[0] = 0;
 920
 921         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 922            when using extended controls.
 923            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 924            is it allowed for backwards compatibility.
 925          */
 926         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 927                 return 0;
 928         if (!c->which)
 929                 return 1;
 930         /* Check that all controls are from the same control class. */
 931         for (i = 0; i < c->count; i++) {
 932                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 933                         c->error_idx = i;
 934                         return 0;
 935                 }
 936         }
 937         return 1;
 938 }
 939
 940 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 941 {
 942         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 943                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 944                              V4L2_CAP_VIDEO_OUTPUT |
 945                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 946                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 947         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 948                               V4L2_CAP_META_OUTPUT;
 949         struct video_device *vfd = video_devdata(file);
 950         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 951         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 952                       (vfd->device_caps & vid_caps);
 953         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 954         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 955         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 956         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 957                        (vfd->device_caps & meta_caps);
 958         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 959         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 960
 961         if (ops == NULL)
 962                 return -EINVAL;
 963
 964         switch (type) {
 965         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 966                 if ((is_vid || is_tch) && is_rx &&
 967                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 968                         return 0;
 969                 break;
 970         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 971                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 972                         return 0;
 973                 break;
 974         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 975                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 976                         return 0;
 977                 break;
 978         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 979                 if (is_vid && is_tx &&
 980                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 981                         return 0;
 982                 break;
 983         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 984                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 985                         return 0;
 986                 break;
 987         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 988                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 989                         return 0;
 990                 break;
 991         case V4L2_BUF_TYPE_VBI_CAPTURE:
 992                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 993                         return 0;
 994                 break;
 995         case V4L2_BUF_TYPE_VBI_OUTPUT:
 996                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 997                         return 0;
 998                 break;
 999         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1000                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
1001                         return 0;
1002                 break;
1003         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1004                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
1005                         return 0;
1006                 break;
1007         case V4L2_BUF_TYPE_SDR_CAPTURE:
1008                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
1009                         return 0;
1010                 break;
1011         case V4L2_BUF_TYPE_SDR_OUTPUT:
1012                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
1013                         return 0;
1014                 break;
1015         case V4L2_BUF_TYPE_META_CAPTURE:
1016                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
1017                         return 0;
1018                 break;
1019         case V4L2_BUF_TYPE_META_OUTPUT:
1020                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1021                         return 0;
1022                 break;
1023         default:
1024                 break;
1025         }
1026         return -EINVAL;
1027 }
1028
1029 static void v4l_sanitize_format(struct v4l2_format *fmt)
1030 {
1031         unsigned int offset;
1032
1033         /* Make sure num_planes is not bogus */
1034         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1035             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1036                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1037                                                VIDEO_MAX_PLANES);
1038
1039         /*
1040          * The v4l2_pix_format structure has been extended with fields that were
1041          * not previously required to be set to zero by applications. The priv
1042          * field, when set to a magic value, indicates the the extended fields
1043          * are valid. Otherwise they will contain undefined values. To simplify
1044          * the API towards drivers zero the extended fields and set the priv
1045          * field to the magic value when the extended pixel format structure
1046          * isn't used by applications.
1047          */
1048
1049         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1050             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1051                 return;
1052
1053         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1054                 return;
1055
1056         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1057
1058         offset = offsetof(struct v4l2_pix_format, priv)
1059                + sizeof(fmt->fmt.pix.priv);
1060         memset(((void *)&fmt->fmt.pix) + offset, 0,
1061                sizeof(fmt->fmt.pix) - offset);
1062 }
1063
1064 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1065                                 struct file *file, void *fh, void *arg)
1066 {
1067         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1068         struct video_device *vfd = video_devdata(file);
1069         int ret;
1070
1071         cap->version = LINUX_VERSION_CODE;
1072         cap->device_caps = vfd->device_caps;
1073         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1074
1075         ret = ops->vidioc_querycap(file, fh, cap);
1076
1077         /*
1078          * Drivers must not change device_caps, so check for this and
1079          * warn if this happened.
1080          */
1081         WARN_ON(cap->device_caps != vfd->device_caps);
1082         /*
1083          * Check that capabilities is a superset of
1084          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1085          */
1086         WARN_ON((cap->capabilities &
1087                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1088                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1089         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1090         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1091
1092         return ret;
1093 }
1094
1095 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1096                        struct file *file, void *fh, void *arg)
1097 {
1098         struct video_device *vfd = video_devdata(file);
1099
1100         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1101                 *(int *)arg = 0;
1102                 return 0;
1103         }
1104
1105         return ops->vidioc_g_input(file, fh, arg);
1106 }
1107
1108 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1109                         struct file *file, void *fh, void *arg)
1110 {
1111         struct video_device *vfd = video_devdata(file);
1112
1113         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1114                 *(int *)arg = 0;
1115                 return 0;
1116         }
1117
1118         return ops->vidioc_g_output(file, fh, arg);
1119 }
1120
1121 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1122                                 struct file *file, void *fh, void *arg)
1123 {
1124         struct video_device *vfd = video_devdata(file);
1125         int ret;
1126
1127         ret = v4l_enable_media_source(vfd);
1128         if (ret)
1129                 return ret;
1130
1131         if (vfd->device_caps & V4L2_CAP_IO_MC)
1132                 return  *(int *)arg ? -EINVAL : 0;
1133
1134         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1135 }
1136
1137 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1138                                 struct file *file, void *fh, void *arg)
1139 {
1140         struct video_device *vfd = video_devdata(file);
1141
1142         if (vfd->device_caps & V4L2_CAP_IO_MC)
1143                 return  *(int *)arg ? -EINVAL : 0;
1144
1145         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1146 }
1147
1148 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1149                                 struct file *file, void *fh, void *arg)
1150 {
1151         struct video_device *vfd;
1152         u32 *p = arg;
1153
1154         vfd = video_devdata(file);
1155         *p = v4l2_prio_max(vfd->prio);
1156         return 0;
1157 }
1158
1159 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1160                                 struct file *file, void *fh, void *arg)
1161 {
1162         struct video_device *vfd;
1163         struct v4l2_fh *vfh;
1164         u32 *p = arg;
1165
1166         vfd = video_devdata(file);
1167         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1168                 return -ENOTTY;
1169         vfh = file->private_data;
1170         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1171 }
1172
1173 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1174                                 struct file *file, void *fh, void *arg)
1175 {
1176         struct video_device *vfd = video_devdata(file);
1177         struct v4l2_input *p = arg;
1178
1179         /*
1180          * We set the flags for CAP_DV_TIMINGS &
1181          * CAP_STD here based on ioctl handler provided by the
1182          * driver. If the driver doesn't support these
1183          * for a specific input, it must override these flags.
1184          */
1185         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1186                 p->capabilities |= V4L2_IN_CAP_STD;
1187
1188         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1189                 if (p->index)
1190                         return -EINVAL;
1191                 strscpy(p->name, vfd->name, sizeof(p->name));
1192                 p->type = V4L2_INPUT_TYPE_CAMERA;
1193                 return 0;
1194         }
1195
1196         return ops->vidioc_enum_input(file, fh, p);
1197 }
1198
1199 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1200                                 struct file *file, void *fh, void *arg)
1201 {
1202         struct video_device *vfd = video_devdata(file);
1203         struct v4l2_output *p = arg;
1204
1205         /*
1206          * We set the flags for CAP_DV_TIMINGS &
1207          * CAP_STD here based on ioctl handler provided by the
1208          * driver. If the driver doesn't support these
1209          * for a specific output, it must override these flags.
1210          */
1211         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1212                 p->capabilities |= V4L2_OUT_CAP_STD;
1213
1214         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1215                 if (p->index)
1216                         return -EINVAL;
1217                 strscpy(p->name, vfd->name, sizeof(p->name));
1218                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1219                 return 0;
1220         }
1221
1222         return ops->vidioc_enum_output(file, fh, p);
1223 }
1224
1225 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1226 {
1227         const unsigned sz = sizeof(fmt->description);
1228         const char *descr = NULL;
1229         u32 flags = 0;
1230
1231         /*
1232          * We depart from the normal coding style here since the descriptions
1233          * should be aligned so it is easy to see which descriptions will be
1234          * longer than 31 characters (the max length for a description).
1235          * And frankly, this is easier to read anyway.
1236          *
1237          * Note that gcc will use O(log N) comparisons to find the right case.
1238          */
1239         switch (fmt->pixelformat) {
1240         /* Max description length mask: descr = "0123456789012345678901234567890" */
1241         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1242         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1243         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1244         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1245         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1246         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1247         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1248         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1249         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1250         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1251         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1252         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1253         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1254         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1255         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1256         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1257         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1258         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1259         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1260         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1261         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1262         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1263         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1264         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1265         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1266         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1267         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1268         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1269         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1270         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1271         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1272         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1273         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1274         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1275         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1276         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1277         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1278         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1279         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1280         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1281         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1282         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1283         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1284         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1285         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1286         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1287         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1288         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1289         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1290         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1291         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1292         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1293         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1294         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1295         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1296         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1297         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1298         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1299         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1300         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1301         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1302         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1303         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1304         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1305         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1306         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1307         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1308         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1309         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1310         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1311         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1312         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1313         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1314         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1315         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1316         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1317         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1318         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1319         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1320         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1321         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1322         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1323         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1324         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1325         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1326         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1327         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1328         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1329         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1330         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1331         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1332         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1333         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1334         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1335         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1336         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1337         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1338         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1339         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1340         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1341         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1342         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1343         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1344         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1345         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1346         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1347         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1348         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1349         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1350         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1351         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1352         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1353         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1354         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1355         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1356         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1357         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1358         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1359         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1360         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1361         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1362         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1363         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1364         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1365         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1366         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1367         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1368         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1369         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1370         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1371         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1372         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1373         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1374         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1375         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1376         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1377         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1378         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1379         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1380         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1381         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1382         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1383         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1384         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1385         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1386         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1387         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1388         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1389         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1390         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1391         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1392         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1393         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1394         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1395         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1396         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1397         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1398         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1399         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1400         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1401         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1402         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1403         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1404         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1405         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1406         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1407
1408         default:
1409                 /* Compressed formats */
1410                 flags = V4L2_FMT_FLAG_COMPRESSED;
1411                 switch (fmt->pixelformat) {
1412                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1413                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1414                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1415                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1416                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1417                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1418                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1419                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1420                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1421                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1422                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1423                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1424                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1425                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1426                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1427                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1428                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1429                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1430                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1431                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1432                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1433                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1434                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1435                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1436                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1437                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1438                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1439                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1440                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1441                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1442                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1443                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1444                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1445                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1446                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1447                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1448                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1449                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1450                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1451                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1452                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1453                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1454                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1455                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1456                 default:
1457                         if (fmt->description[0])
1458                                 return;
1459                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1460                         flags = 0;
1461                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1462                                         (char)(fmt->pixelformat & 0x7f),
1463                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1464                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1465                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1466                                         (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1467                         break;
1468                 }
1469         }
1470
1471         if (descr)
1472                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1473         fmt->flags |= flags;
1474 }
1475
1476 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1477                                 struct file *file, void *fh, void *arg)
1478 {
1479         struct video_device *vdev = video_devdata(file);
1480         struct v4l2_fmtdesc *p = arg;
1481         int ret = check_fmt(file, p->type);
1482         u32 mbus_code;
1483         u32 cap_mask;
1484
1485         if (ret)
1486                 return ret;
1487         ret = -EINVAL;
1488
1489         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1490                 p->mbus_code = 0;
1491
1492         mbus_code = p->mbus_code;
1493         CLEAR_AFTER_FIELD(p, type);
1494         p->mbus_code = mbus_code;
1495
1496         switch (p->type) {
1497         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1498         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1499                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1500                            V4L2_CAP_VIDEO_M2M_MPLANE;
1501                 if (!!(vdev->device_caps & cap_mask) !=
1502                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1503                         break;
1504
1505                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1506                         break;
1507                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1508                 break;
1509         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1510                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1511                         break;
1512                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1513                 break;
1514         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1515         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1516                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1517                            V4L2_CAP_VIDEO_M2M_MPLANE;
1518                 if (!!(vdev->device_caps & cap_mask) !=
1519                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1520                         break;
1521
1522                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1523                         break;
1524                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1525                 break;
1526         case V4L2_BUF_TYPE_SDR_CAPTURE:
1527                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1528                         break;
1529                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1530                 break;
1531         case V4L2_BUF_TYPE_SDR_OUTPUT:
1532                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1533                         break;
1534                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1535                 break;
1536         case V4L2_BUF_TYPE_META_CAPTURE:
1537                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1538                         break;
1539                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1540                 break;
1541         case V4L2_BUF_TYPE_META_OUTPUT:
1542                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1543                         break;
1544                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1545                 break;
1546         }
1547         if (ret == 0)
1548                 v4l_fill_fmtdesc(p);
1549         return ret;
1550 }
1551
1552 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1553 {
1554         /*
1555          * The v4l2_pix_format structure contains fields that make no sense for
1556          * touch. Set them to default values in this case.
1557          */
1558
1559         p->field = V4L2_FIELD_NONE;
1560         p->colorspace = V4L2_COLORSPACE_RAW;
1561         p->flags = 0;
1562         p->ycbcr_enc = 0;
1563         p->quantization = 0;
1564         p->xfer_func = 0;
1565 }
1566
1567 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1568                                 struct file *file, void *fh, void *arg)
1569 {
1570         struct v4l2_format *p = arg;
1571         struct video_device *vfd = video_devdata(file);
1572         int ret = check_fmt(file, p->type);
1573
1574         if (ret)
1575                 return ret;
1576
1577         /*
1578          * fmt can't be cleared for these overlay types due to the 'clips'
1579          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1580          * Those are provided by the user. So handle these two overlay types
1581          * first, and then just do a simple memset for the other types.
1582          */
1583         switch (p->type) {
1584         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1585         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1586                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1587                 u32 clipcount = p->fmt.win.clipcount;
1588                 void __user *bitmap = p->fmt.win.bitmap;
1589
1590                 memset(&p->fmt, 0, sizeof(p->fmt));
1591                 p->fmt.win.clips = clips;
1592                 p->fmt.win.clipcount = clipcount;
1593                 p->fmt.win.bitmap = bitmap;
1594                 break;
1595         }
1596         default:
1597                 memset(&p->fmt, 0, sizeof(p->fmt));
1598                 break;
1599         }
1600
1601         switch (p->type) {
1602         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1603                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1604                         break;
1605                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1606                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1607                 /* just in case the driver zeroed it again */
1608                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1609                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1610                         v4l_pix_format_touch(&p->fmt.pix);
1611                 return ret;
1612         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1613                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1614         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1615                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1616         case V4L2_BUF_TYPE_VBI_CAPTURE:
1617                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1618         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1619                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1620         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1621                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1622                         break;
1623                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1624                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1625                 /* just in case the driver zeroed it again */
1626                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1627                 return ret;
1628         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1629                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1630         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1631                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1632         case V4L2_BUF_TYPE_VBI_OUTPUT:
1633                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1634         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1635                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1636         case V4L2_BUF_TYPE_SDR_CAPTURE:
1637                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1638         case V4L2_BUF_TYPE_SDR_OUTPUT:
1639                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1640         case V4L2_BUF_TYPE_META_CAPTURE:
1641                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1642         case V4L2_BUF_TYPE_META_OUTPUT:
1643                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1644         }
1645         return -EINVAL;
1646 }
1647
1648 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1649                                 struct file *file, void *fh, void *arg)
1650 {
1651         struct v4l2_format *p = arg;
1652         struct video_device *vfd = video_devdata(file);
1653         int ret = check_fmt(file, p->type);
1654         unsigned int i;
1655
1656         if (ret)
1657                 return ret;
1658
1659         ret = v4l_enable_media_source(vfd);
1660         if (ret)
1661                 return ret;
1662         v4l_sanitize_format(p);
1663
1664         switch (p->type) {
1665         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1666                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1667                         break;
1668                 CLEAR_AFTER_FIELD(p, fmt.pix);
1669                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1670                 /* just in case the driver zeroed it again */
1671                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1672                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1673                         v4l_pix_format_touch(&p->fmt.pix);
1674                 return ret;
1675         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1676                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1677                         break;
1678                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1679                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1680                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1681                                           bytesperline);
1682                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1683         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1684                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1685                         break;
1686                 CLEAR_AFTER_FIELD(p, fmt.win);
1687                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1688         case V4L2_BUF_TYPE_VBI_CAPTURE:
1689                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1690                         break;
1691                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1692                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1693         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1694                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1695                         break;
1696                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1697                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1698         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1699                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1700                         break;
1701                 CLEAR_AFTER_FIELD(p, fmt.pix);
1702                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1703                 /* just in case the driver zeroed it again */
1704                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1705                 return ret;
1706         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1707                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1708                         break;
1709                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1710                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1711                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1712                                           bytesperline);
1713                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1714         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1715                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1716                         break;
1717                 CLEAR_AFTER_FIELD(p, fmt.win);
1718                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1719         case V4L2_BUF_TYPE_VBI_OUTPUT:
1720                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1721                         break;
1722                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1723                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1724         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1725                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1726                         break;
1727                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1728                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1729         case V4L2_BUF_TYPE_SDR_CAPTURE:
1730                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1731                         break;
1732                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1733                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1734         case V4L2_BUF_TYPE_SDR_OUTPUT:
1735                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1736                         break;
1737                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1738                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1739         case V4L2_BUF_TYPE_META_CAPTURE:
1740                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1741                         break;
1742                 CLEAR_AFTER_FIELD(p, fmt.meta);
1743                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1744         case V4L2_BUF_TYPE_META_OUTPUT:
1745                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1746                         break;
1747                 CLEAR_AFTER_FIELD(p, fmt.meta);
1748                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1749         }
1750         return -EINVAL;
1751 }
1752
1753 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1754                                 struct file *file, void *fh, void *arg)
1755 {
1756         struct v4l2_format *p = arg;
1757         struct video_device *vfd = video_devdata(file);
1758         int ret = check_fmt(file, p->type);
1759         unsigned int i;
1760
1761         if (ret)
1762                 return ret;
1763
1764         v4l_sanitize_format(p);
1765
1766         switch (p->type) {
1767         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1768                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1769                         break;
1770                 CLEAR_AFTER_FIELD(p, fmt.pix);
1771                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1772                 /* just in case the driver zeroed it again */
1773                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1774                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1775                         v4l_pix_format_touch(&p->fmt.pix);
1776                 return ret;
1777         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1778                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1779                         break;
1780                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1781                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1782                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1783                                           bytesperline);
1784                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1785         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1786                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1787                         break;
1788                 CLEAR_AFTER_FIELD(p, fmt.win);
1789                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1790         case V4L2_BUF_TYPE_VBI_CAPTURE:
1791                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1792                         break;
1793                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1794                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1795         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1796                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1797                         break;
1798                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1799                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1800         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1801                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1802                         break;
1803                 CLEAR_AFTER_FIELD(p, fmt.pix);
1804                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1805                 /* just in case the driver zeroed it again */
1806                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1807                 return ret;
1808         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1809                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1810                         break;
1811                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1812                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1813                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1814                                           bytesperline);
1815                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1816         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1817                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1818                         break;
1819                 CLEAR_AFTER_FIELD(p, fmt.win);
1820                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1821         case V4L2_BUF_TYPE_VBI_OUTPUT:
1822                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1823                         break;
1824                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1825                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1826         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1827                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1828                         break;
1829                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1830                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1831         case V4L2_BUF_TYPE_SDR_CAPTURE:
1832                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1833                         break;
1834                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1835                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1836         case V4L2_BUF_TYPE_SDR_OUTPUT:
1837                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1838                         break;
1839                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1840                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1841         case V4L2_BUF_TYPE_META_CAPTURE:
1842                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1843                         break;
1844                 CLEAR_AFTER_FIELD(p, fmt.meta);
1845                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1846         case V4L2_BUF_TYPE_META_OUTPUT:
1847                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1848                         break;
1849                 CLEAR_AFTER_FIELD(p, fmt.meta);
1850                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1851         }
1852         return -EINVAL;
1853 }
1854
1855 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1856                                 struct file *file, void *fh, void *arg)
1857 {
1858         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1859 }
1860
1861 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1862                                 struct file *file, void *fh, void *arg)
1863 {
1864         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1865 }
1866
1867 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1868                                 struct file *file, void *fh, void *arg)
1869 {
1870         struct video_device *vfd = video_devdata(file);
1871         struct v4l2_tuner *p = arg;
1872         int err;
1873
1874         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1875                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1876         err = ops->vidioc_g_tuner(file, fh, p);
1877         if (!err)
1878                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1879         return err;
1880 }
1881
1882 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1883                                 struct file *file, void *fh, void *arg)
1884 {
1885         struct video_device *vfd = video_devdata(file);
1886         struct v4l2_tuner *p = arg;
1887         int ret;
1888
1889         ret = v4l_enable_media_source(vfd);
1890         if (ret)
1891                 return ret;
1892         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1893                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1894         return ops->vidioc_s_tuner(file, fh, p);
1895 }
1896
1897 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1898                                 struct file *file, void *fh, void *arg)
1899 {
1900         struct video_device *vfd = video_devdata(file);
1901         struct v4l2_modulator *p = arg;
1902         int err;
1903
1904         if (vfd->vfl_type == VFL_TYPE_RADIO)
1905                 p->type = V4L2_TUNER_RADIO;
1906
1907         err = ops->vidioc_g_modulator(file, fh, p);
1908         if (!err)
1909                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1910         return err;
1911 }
1912
1913 static int v4l_s_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
1919         if (vfd->vfl_type == VFL_TYPE_RADIO)
1920                 p->type = V4L2_TUNER_RADIO;
1921
1922         return ops->vidioc_s_modulator(file, fh, p);
1923 }
1924
1925 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1926                                 struct file *file, void *fh, void *arg)
1927 {
1928         struct video_device *vfd = video_devdata(file);
1929         struct v4l2_frequency *p = arg;
1930
1931         if (vfd->vfl_type == VFL_TYPE_SDR)
1932                 p->type = V4L2_TUNER_SDR;
1933         else
1934                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1935                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1936         return ops->vidioc_g_frequency(file, fh, p);
1937 }
1938
1939 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1940                                 struct file *file, void *fh, void *arg)
1941 {
1942         struct video_device *vfd = video_devdata(file);
1943         const struct v4l2_frequency *p = arg;
1944         enum v4l2_tuner_type type;
1945         int ret;
1946
1947         ret = v4l_enable_media_source(vfd);
1948         if (ret)
1949                 return ret;
1950         if (vfd->vfl_type == VFL_TYPE_SDR) {
1951                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1952                         return -EINVAL;
1953         } else {
1954                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1955                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1956                 if (type != p->type)
1957                         return -EINVAL;
1958         }
1959         return ops->vidioc_s_frequency(file, fh, p);
1960 }
1961
1962 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1963                                 struct file *file, void *fh, void *arg)
1964 {
1965         struct video_device *vfd = video_devdata(file);
1966         struct v4l2_standard *p = arg;
1967
1968         return v4l_video_std_enumstd(p, vfd->tvnorms);
1969 }
1970
1971 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1972                                 struct file *file, void *fh, void *arg)
1973 {
1974         struct video_device *vfd = video_devdata(file);
1975         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1976         int ret;
1977
1978         ret = v4l_enable_media_source(vfd);
1979         if (ret)
1980                 return ret;
1981         norm = id & vfd->tvnorms;
1982         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1983                 return -EINVAL;
1984
1985         /* Calls the specific handler */
1986         return ops->vidioc_s_std(file, fh, norm);
1987 }
1988
1989 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1990                                 struct file *file, void *fh, void *arg)
1991 {
1992         struct video_device *vfd = video_devdata(file);
1993         v4l2_std_id *p = arg;
1994         int ret;
1995
1996         ret = v4l_enable_media_source(vfd);
1997         if (ret)
1998                 return ret;
1999         /*
2000          * If no signal is detected, then the driver should return
2001          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2002          * any standards that do not apply removed.
2003          *
2004          * This means that tuners, audio and video decoders can join
2005          * their efforts to improve the standards detection.
2006          */
2007         *p = vfd->tvnorms;
2008         return ops->vidioc_querystd(file, fh, arg);
2009 }
2010
2011 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2012                                 struct file *file, void *fh, void *arg)
2013 {
2014         struct video_device *vfd = video_devdata(file);
2015         struct v4l2_hw_freq_seek *p = arg;
2016         enum v4l2_tuner_type type;
2017         int ret;
2018
2019         ret = v4l_enable_media_source(vfd);
2020         if (ret)
2021                 return ret;
2022         /* s_hw_freq_seek is not supported for SDR for now */
2023         if (vfd->vfl_type == VFL_TYPE_SDR)
2024                 return -EINVAL;
2025
2026         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2027                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2028         if (p->type != type)
2029                 return -EINVAL;
2030         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2031 }
2032
2033 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2034                                 struct file *file, void *fh, void *arg)
2035 {
2036         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2037 }
2038
2039 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2040                                 struct file *file, void *fh, void *arg)
2041 {
2042         struct v4l2_requestbuffers *p = arg;
2043         int ret = check_fmt(file, p->type);
2044
2045         if (ret)
2046                 return ret;
2047         return ops->vidioc_reqbufs(file, fh, p);
2048 }
2049
2050 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2051                                 struct file *file, void *fh, void *arg)
2052 {
2053         struct v4l2_buffer *p = arg;
2054         int ret = check_fmt(file, p->type);
2055
2056         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2057 }
2058
2059 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2060                                 struct file *file, void *fh, void *arg)
2061 {
2062         struct v4l2_buffer *p = arg;
2063         int ret = check_fmt(file, p->type);
2064
2065         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2066 }
2067
2068 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2069                                 struct file *file, void *fh, void *arg)
2070 {
2071         struct v4l2_buffer *p = arg;
2072         int ret = check_fmt(file, p->type);
2073
2074         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2075 }
2076
2077 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2078                                 struct file *file, void *fh, void *arg)
2079 {
2080         struct v4l2_create_buffers *create = arg;
2081         int ret = check_fmt(file, create->format.type);
2082
2083         if (ret)
2084                 return ret;
2085
2086         CLEAR_AFTER_FIELD(create, flags);
2087
2088         v4l_sanitize_format(&create->format);
2089
2090         ret = ops->vidioc_create_bufs(file, fh, create);
2091
2092         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2093             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2094                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2095
2096         return ret;
2097 }
2098
2099 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2100                                 struct file *file, void *fh, void *arg)
2101 {
2102         struct v4l2_buffer *b = arg;
2103         int ret = check_fmt(file, b->type);
2104
2105         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2106 }
2107
2108 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2109                                 struct file *file, void *fh, void *arg)
2110 {
2111         struct v4l2_streamparm *p = arg;
2112         v4l2_std_id std;
2113         int ret = check_fmt(file, p->type);
2114
2115         if (ret)
2116                 return ret;
2117         if (ops->vidioc_g_parm)
2118                 return ops->vidioc_g_parm(file, fh, p);
2119         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2120             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2121                 return -EINVAL;
2122         p->parm.capture.readbuffers = 2;
2123         ret = ops->vidioc_g_std(file, fh, &std);
2124         if (ret == 0)
2125                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2126         return ret;
2127 }
2128
2129 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2130                                 struct file *file, void *fh, void *arg)
2131 {
2132         struct v4l2_streamparm *p = arg;
2133         int ret = check_fmt(file, p->type);
2134
2135         if (ret)
2136                 return ret;
2137
2138         /* Note: extendedmode is never used in drivers */
2139         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2140                 memset(p->parm.output.reserved, 0,
2141                        sizeof(p->parm.output.reserved));
2142                 p->parm.output.extendedmode = 0;
2143                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2144         } else {
2145                 memset(p->parm.capture.reserved, 0,
2146                        sizeof(p->parm.capture.reserved));
2147                 p->parm.capture.extendedmode = 0;
2148                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2149         }
2150         return ops->vidioc_s_parm(file, fh, p);
2151 }
2152
2153 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2154                                 struct file *file, void *fh, void *arg)
2155 {
2156         struct video_device *vfd = video_devdata(file);
2157         struct v4l2_queryctrl *p = arg;
2158         struct v4l2_fh *vfh =
2159                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2160
2161         if (vfh && vfh->ctrl_handler)
2162                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2163         if (vfd->ctrl_handler)
2164                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2165         if (ops->vidioc_queryctrl)
2166                 return ops->vidioc_queryctrl(file, fh, p);
2167         return -ENOTTY;
2168 }
2169
2170 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2171                                 struct file *file, void *fh, void *arg)
2172 {
2173         struct video_device *vfd = video_devdata(file);
2174         struct v4l2_query_ext_ctrl *p = arg;
2175         struct v4l2_fh *vfh =
2176                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2177
2178         if (vfh && vfh->ctrl_handler)
2179                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2180         if (vfd->ctrl_handler)
2181                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2182         if (ops->vidioc_query_ext_ctrl)
2183                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2184         return -ENOTTY;
2185 }
2186
2187 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2188                                 struct file *file, void *fh, void *arg)
2189 {
2190         struct video_device *vfd = video_devdata(file);
2191         struct v4l2_querymenu *p = arg;
2192         struct v4l2_fh *vfh =
2193                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2194
2195         if (vfh && vfh->ctrl_handler)
2196                 return v4l2_querymenu(vfh->ctrl_handler, p);
2197         if (vfd->ctrl_handler)
2198                 return v4l2_querymenu(vfd->ctrl_handler, p);
2199         if (ops->vidioc_querymenu)
2200                 return ops->vidioc_querymenu(file, fh, p);
2201         return -ENOTTY;
2202 }
2203
2204 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2205                                 struct file *file, void *fh, void *arg)
2206 {
2207         struct video_device *vfd = video_devdata(file);
2208         struct v4l2_control *p = arg;
2209         struct v4l2_fh *vfh =
2210                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2211         struct v4l2_ext_controls ctrls;
2212         struct v4l2_ext_control ctrl;
2213
2214         if (vfh && vfh->ctrl_handler)
2215                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2216         if (vfd->ctrl_handler)
2217                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2218         if (ops->vidioc_g_ctrl)
2219                 return ops->vidioc_g_ctrl(file, fh, p);
2220         if (ops->vidioc_g_ext_ctrls == NULL)
2221                 return -ENOTTY;
2222
2223         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2224         ctrls.count = 1;
2225         ctrls.controls = &ctrl;
2226         ctrl.id = p->id;
2227         ctrl.value = p->value;
2228         if (check_ext_ctrls(&ctrls, 1)) {
2229                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2230
2231                 if (ret == 0)
2232                         p->value = ctrl.value;
2233                 return ret;
2234         }
2235         return -EINVAL;
2236 }
2237
2238 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2239                                 struct file *file, void *fh, void *arg)
2240 {
2241         struct video_device *vfd = video_devdata(file);
2242         struct v4l2_control *p = arg;
2243         struct v4l2_fh *vfh =
2244                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2245         struct v4l2_ext_controls ctrls;
2246         struct v4l2_ext_control ctrl;
2247
2248         if (vfh && vfh->ctrl_handler)
2249                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2250         if (vfd->ctrl_handler)
2251                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2252         if (ops->vidioc_s_ctrl)
2253                 return ops->vidioc_s_ctrl(file, fh, p);
2254         if (ops->vidioc_s_ext_ctrls == NULL)
2255                 return -ENOTTY;
2256
2257         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2258         ctrls.count = 1;
2259         ctrls.controls = &ctrl;
2260         ctrl.id = p->id;
2261         ctrl.value = p->value;
2262         if (check_ext_ctrls(&ctrls, 1))
2263                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2264         return -EINVAL;
2265 }
2266
2267 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2268                                 struct file *file, void *fh, void *arg)
2269 {
2270         struct video_device *vfd = video_devdata(file);
2271         struct v4l2_ext_controls *p = arg;
2272         struct v4l2_fh *vfh =
2273                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2274
2275         p->error_idx = p->count;
2276         if (vfh && vfh->ctrl_handler)
2277                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2278                                         vfd, vfd->v4l2_dev->mdev, p);
2279         if (vfd->ctrl_handler)
2280                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2281                                         vfd, vfd->v4l2_dev->mdev, p);
2282         if (ops->vidioc_g_ext_ctrls == NULL)
2283                 return -ENOTTY;
2284         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2285                                         -EINVAL;
2286 }
2287
2288 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2289                                 struct file *file, void *fh, void *arg)
2290 {
2291         struct video_device *vfd = video_devdata(file);
2292         struct v4l2_ext_controls *p = arg;
2293         struct v4l2_fh *vfh =
2294                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2295
2296         p->error_idx = p->count;
2297         if (vfh && vfh->ctrl_handler)
2298                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2299                                         vfd, vfd->v4l2_dev->mdev, p);
2300         if (vfd->ctrl_handler)
2301                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2302                                         vfd, vfd->v4l2_dev->mdev, p);
2303         if (ops->vidioc_s_ext_ctrls == NULL)
2304                 return -ENOTTY;
2305         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2306                                         -EINVAL;
2307 }
2308
2309 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2310                                 struct file *file, void *fh, void *arg)
2311 {
2312         struct video_device *vfd = video_devdata(file);
2313         struct v4l2_ext_controls *p = arg;
2314         struct v4l2_fh *vfh =
2315                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2316
2317         p->error_idx = p->count;
2318         if (vfh && vfh->ctrl_handler)
2319                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2320                                           vfd, vfd->v4l2_dev->mdev, p);
2321         if (vfd->ctrl_handler)
2322                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2323                                           vfd, vfd->v4l2_dev->mdev, p);
2324         if (ops->vidioc_try_ext_ctrls == NULL)
2325                 return -ENOTTY;
2326         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2327                                         -EINVAL;
2328 }
2329
2330 /*
2331  * The selection API specified originally that the _MPLANE buffer types
2332  * shouldn't be used. The reasons for this are lost in the mists of time
2333  * (or just really crappy memories). Regardless, this is really annoying
2334  * for userspace. So to keep things simple we map _MPLANE buffer types
2335  * to their 'regular' counterparts before calling the driver. And we
2336  * restore it afterwards. This way applications can use either buffer
2337  * type and drivers don't need to check for both.
2338  */
2339 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2340                            struct file *file, void *fh, void *arg)
2341 {
2342         struct v4l2_selection *p = arg;
2343         u32 old_type = p->type;
2344         int ret;
2345
2346         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2347                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2348         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2349                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2350         ret = ops->vidioc_g_selection(file, fh, p);
2351         p->type = old_type;
2352         return ret;
2353 }
2354
2355 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2356                            struct file *file, void *fh, void *arg)
2357 {
2358         struct v4l2_selection *p = arg;
2359         u32 old_type = p->type;
2360         int ret;
2361
2362         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2363                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2364         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2365                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2366         ret = ops->vidioc_s_selection(file, fh, p);
2367         p->type = old_type;
2368         return ret;
2369 }
2370
2371 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2372                                 struct file *file, void *fh, void *arg)
2373 {
2374         struct video_device *vfd = video_devdata(file);
2375         struct v4l2_crop *p = arg;
2376         struct v4l2_selection s = {
2377                 .type = p->type,
2378         };
2379         int ret;
2380
2381         /* simulate capture crop using selection api */
2382
2383         /* crop means compose for output devices */
2384         if (V4L2_TYPE_IS_OUTPUT(p->type))
2385                 s.target = V4L2_SEL_TGT_COMPOSE;
2386         else
2387                 s.target = V4L2_SEL_TGT_CROP;
2388
2389         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2390                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2391                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2392
2393         ret = v4l_g_selection(ops, file, fh, &s);
2394
2395         /* copying results to old structure on success */
2396         if (!ret)
2397                 p->c = s.r;
2398         return ret;
2399 }
2400
2401 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2402                                 struct file *file, void *fh, void *arg)
2403 {
2404         struct video_device *vfd = video_devdata(file);
2405         struct v4l2_crop *p = arg;
2406         struct v4l2_selection s = {
2407                 .type = p->type,
2408                 .r = p->c,
2409         };
2410
2411         /* simulate capture crop using selection api */
2412
2413         /* crop means compose for output devices */
2414         if (V4L2_TYPE_IS_OUTPUT(p->type))
2415                 s.target = V4L2_SEL_TGT_COMPOSE;
2416         else
2417                 s.target = V4L2_SEL_TGT_CROP;
2418
2419         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2420                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2421                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2422
2423         return v4l_s_selection(ops, file, fh, &s);
2424 }
2425
2426 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2427                                 struct file *file, void *fh, void *arg)
2428 {
2429         struct video_device *vfd = video_devdata(file);
2430         struct v4l2_cropcap *p = arg;
2431         struct v4l2_selection s = { .type = p->type };
2432         int ret = 0;
2433
2434         /* setting trivial pixelaspect */
2435         p->pixelaspect.numerator = 1;
2436         p->pixelaspect.denominator = 1;
2437
2438         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2439                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2440         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2441                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2442
2443         /*
2444          * The determine_valid_ioctls() call already should ensure
2445          * that this can never happen, but just in case...
2446          */
2447         if (WARN_ON(!ops->vidioc_g_selection))
2448                 return -ENOTTY;
2449
2450         if (ops->vidioc_g_pixelaspect)
2451                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2452                                                 &p->pixelaspect);
2453
2454         /*
2455          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2456          * square pixel aspect ratio in that case.
2457          */
2458         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2459                 return ret;
2460
2461         /* Use g_selection() to fill in the bounds and defrect rectangles */
2462
2463         /* obtaining bounds */
2464         if (V4L2_TYPE_IS_OUTPUT(p->type))
2465                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2466         else
2467                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2468
2469         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2470                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2471                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2472
2473         ret = v4l_g_selection(ops, file, fh, &s);
2474         if (ret)
2475                 return ret;
2476         p->bounds = s.r;
2477
2478         /* obtaining defrect */
2479         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2480                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2481         else
2482                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2483
2484         ret = v4l_g_selection(ops, file, fh, &s);
2485         if (ret)
2486                 return ret;
2487         p->defrect = s.r;
2488
2489         return 0;
2490 }
2491
2492 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2493                                 struct file *file, void *fh, void *arg)
2494 {
2495         struct video_device *vfd = video_devdata(file);
2496         int ret;
2497
2498         if (vfd->v4l2_dev)
2499                 pr_info("%s: =================  START STATUS  =================\n",
2500                         vfd->v4l2_dev->name);
2501         ret = ops->vidioc_log_status(file, fh);
2502         if (vfd->v4l2_dev)
2503                 pr_info("%s: ==================  END STATUS  ==================\n",
2504                         vfd->v4l2_dev->name);
2505         return ret;
2506 }
2507
2508 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2509                                 struct file *file, void *fh, void *arg)
2510 {
2511 #ifdef CONFIG_VIDEO_ADV_DEBUG
2512         struct v4l2_dbg_register *p = arg;
2513         struct video_device *vfd = video_devdata(file);
2514         struct v4l2_subdev *sd;
2515         int idx = 0;
2516
2517         if (!capable(CAP_SYS_ADMIN))
2518                 return -EPERM;
2519         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2520                 if (vfd->v4l2_dev == NULL)
2521                         return -EINVAL;
2522                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2523                         if (p->match.addr == idx++)
2524                                 return v4l2_subdev_call(sd, core, g_register, p);
2525                 return -EINVAL;
2526         }
2527         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2528             (ops->vidioc_g_chip_info || p->match.addr == 0))
2529                 return ops->vidioc_g_register(file, fh, p);
2530         return -EINVAL;
2531 #else
2532         return -ENOTTY;
2533 #endif
2534 }
2535
2536 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2537                                 struct file *file, void *fh, void *arg)
2538 {
2539 #ifdef CONFIG_VIDEO_ADV_DEBUG
2540         const struct v4l2_dbg_register *p = arg;
2541         struct video_device *vfd = video_devdata(file);
2542         struct v4l2_subdev *sd;
2543         int idx = 0;
2544
2545         if (!capable(CAP_SYS_ADMIN))
2546                 return -EPERM;
2547         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2548                 if (vfd->v4l2_dev == NULL)
2549                         return -EINVAL;
2550                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2551                         if (p->match.addr == idx++)
2552                                 return v4l2_subdev_call(sd, core, s_register, p);
2553                 return -EINVAL;
2554         }
2555         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2556             (ops->vidioc_g_chip_info || p->match.addr == 0))
2557                 return ops->vidioc_s_register(file, fh, p);
2558         return -EINVAL;
2559 #else
2560         return -ENOTTY;
2561 #endif
2562 }
2563
2564 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2565                                 struct file *file, void *fh, void *arg)
2566 {
2567 #ifdef CONFIG_VIDEO_ADV_DEBUG
2568         struct video_device *vfd = video_devdata(file);
2569         struct v4l2_dbg_chip_info *p = arg;
2570         struct v4l2_subdev *sd;
2571         int idx = 0;
2572
2573         switch (p->match.type) {
2574         case V4L2_CHIP_MATCH_BRIDGE:
2575                 if (ops->vidioc_s_register)
2576                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2577                 if (ops->vidioc_g_register)
2578                         p->flags |= V4L2_CHIP_FL_READABLE;
2579                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2580                 if (ops->vidioc_g_chip_info)
2581                         return ops->vidioc_g_chip_info(file, fh, arg);
2582                 if (p->match.addr)
2583                         return -EINVAL;
2584                 return 0;
2585
2586         case V4L2_CHIP_MATCH_SUBDEV:
2587                 if (vfd->v4l2_dev == NULL)
2588                         break;
2589                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2590                         if (p->match.addr != idx++)
2591                                 continue;
2592                         if (sd->ops->core && sd->ops->core->s_register)
2593                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2594                         if (sd->ops->core && sd->ops->core->g_register)
2595                                 p->flags |= V4L2_CHIP_FL_READABLE;
2596                         strscpy(p->name, sd->name, sizeof(p->name));
2597                         return 0;
2598                 }
2599                 break;
2600         }
2601         return -EINVAL;
2602 #else
2603         return -ENOTTY;
2604 #endif
2605 }
2606
2607 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2608                                 struct file *file, void *fh, void *arg)
2609 {
2610         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2611 }
2612
2613 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2614                                 struct file *file, void *fh, void *arg)
2615 {
2616         return ops->vidioc_subscribe_event(fh, arg);
2617 }
2618
2619 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2620                                 struct file *file, void *fh, void *arg)
2621 {
2622         return ops->vidioc_unsubscribe_event(fh, arg);
2623 }
2624
2625 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2626                                 struct file *file, void *fh, void *arg)
2627 {
2628         struct v4l2_sliced_vbi_cap *p = arg;
2629         int ret = check_fmt(file, p->type);
2630
2631         if (ret)
2632                 return ret;
2633
2634         /* Clear up to type, everything after type is zeroed already */
2635         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2636
2637         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2638 }
2639
2640 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2641                                 struct file *file, void *fh, void *arg)
2642 {
2643         struct video_device *vfd = video_devdata(file);
2644         struct v4l2_frequency_band *p = arg;
2645         enum v4l2_tuner_type type;
2646         int err;
2647
2648         if (vfd->vfl_type == VFL_TYPE_SDR) {
2649                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2650                         return -EINVAL;
2651                 type = p->type;
2652         } else {
2653                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2654                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2655                 if (type != p->type)
2656                         return -EINVAL;
2657         }
2658         if (ops->vidioc_enum_freq_bands) {
2659                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2660                 if (err != -ENOTTY)
2661                         return err;
2662         }
2663         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2664                 struct v4l2_tuner t = {
2665                         .index = p->tuner,
2666                         .type = type,
2667                 };
2668
2669                 if (p->index)
2670                         return -EINVAL;
2671                 err = ops->vidioc_g_tuner(file, fh, &t);
2672                 if (err)
2673                         return err;
2674                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2675                 p->rangelow = t.rangelow;
2676                 p->rangehigh = t.rangehigh;
2677                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2678                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2679                 return 0;
2680         }
2681         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2682                 struct v4l2_modulator m = {
2683                         .index = p->tuner,
2684                 };
2685
2686                 if (type != V4L2_TUNER_RADIO)
2687                         return -EINVAL;
2688                 if (p->index)
2689                         return -EINVAL;
2690                 err = ops->vidioc_g_modulator(file, fh, &m);
2691                 if (err)
2692                         return err;
2693                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2694                 p->rangelow = m.rangelow;
2695                 p->rangehigh = m.rangehigh;
2696                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2697                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2698                 return 0;
2699         }
2700         return -ENOTTY;
2701 }
2702
2703 struct v4l2_ioctl_info {
2704         unsigned int ioctl;
2705         u32 flags;
2706         const char * const name;
2707         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2708                     void *fh, void *p);
2709         void (*debug)(const void *arg, bool write_only);
2710 };
2711
2712 /* This control needs a priority check */
2713 #define INFO_FL_PRIO            (1 << 0)
2714 /* This control can be valid if the filehandle passes a control handler. */
2715 #define INFO_FL_CTRL            (1 << 1)
2716 /* Queuing ioctl */
2717 #define INFO_FL_QUEUE           (1 << 2)
2718 /* Always copy back result, even on error */
2719 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2720 /* Zero struct from after the field to the end */
2721 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2722         ((offsetof(struct v4l2_struct, field) +                 \
2723           sizeof_field(struct v4l2_struct, field)) << 16)
2724 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2725
2726 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2727         static int v4l_stub_ ## _vidioc(                        \
2728                         const struct v4l2_ioctl_ops *ops,       \
2729                         struct file *file, void *fh, void *p)   \
2730         {                                                       \
2731                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2732         }
2733
2734 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2735         [_IOC_NR(_ioctl)] = {                                   \
2736                 .ioctl = _ioctl,                                \
2737                 .flags = _flags,                                \
2738                 .name = #_ioctl,                                \
2739                 .func = _func,                                  \
2740                 .debug = _debug,                                \
2741         }
2742
2743 DEFINE_V4L_STUB_FUNC(g_fbuf)
2744 DEFINE_V4L_STUB_FUNC(s_fbuf)
2745 DEFINE_V4L_STUB_FUNC(expbuf)
2746 DEFINE_V4L_STUB_FUNC(g_std)
2747 DEFINE_V4L_STUB_FUNC(g_audio)
2748 DEFINE_V4L_STUB_FUNC(s_audio)
2749 DEFINE_V4L_STUB_FUNC(g_edid)
2750 DEFINE_V4L_STUB_FUNC(s_edid)
2751 DEFINE_V4L_STUB_FUNC(g_audout)
2752 DEFINE_V4L_STUB_FUNC(s_audout)
2753 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2754 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2755 DEFINE_V4L_STUB_FUNC(enumaudio)
2756 DEFINE_V4L_STUB_FUNC(enumaudout)
2757 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2758 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2759 DEFINE_V4L_STUB_FUNC(g_enc_index)
2760 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2761 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2762 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2763 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2764 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2765 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2766 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2767 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2768 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2769
2770 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2771         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2772         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2773         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2774         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2775         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2776         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2777         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2778         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2779         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2780         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2781         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2782         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2783         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2784         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2785         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2786         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2787         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2788         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2789         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2790         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2791         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2792         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2793         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2794         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2795         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2796         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2797         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2798         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2799         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2800         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2801         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2802         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2803         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2804         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2805         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2806         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2807         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2808         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2809         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2810         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2811         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2812         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2813         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2814         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2815         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2816         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2817         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2818         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2819         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2820         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2821         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2822         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2823         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2824         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2825         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)),
2826         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2827         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2828         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2829         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2830         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2831         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2832         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2833         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2834         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2835         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2836         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2837         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2838         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2839         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2840         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)),
2841         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2842         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2843         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2844         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2845         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2846         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2847         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2848         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2849         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2850         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2851         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)),
2852         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)),
2853 };
2854 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2855
2856 static bool v4l2_is_known_ioctl(unsigned int cmd)
2857 {
2858         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2859                 return false;
2860         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2861 }
2862
2863 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2864                                          struct v4l2_fh *vfh, unsigned int cmd,
2865                                          void *arg)
2866 {
2867         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2868                 return vdev->lock;
2869         if (vfh && vfh->m2m_ctx &&
2870             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2871                 if (vfh->m2m_ctx->q_lock)
2872                         return vfh->m2m_ctx->q_lock;
2873         }
2874         if (vdev->queue && vdev->queue->lock &&
2875                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2876                 return vdev->queue->lock;
2877         return vdev->lock;
2878 }
2879
2880 /* Common ioctl debug function. This function can be used by
2881    external ioctl messages as well as internal V4L ioctl */
2882 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2883 {
2884         const char *dir, *type;
2885
2886         if (prefix)
2887                 printk(KERN_DEBUG "%s: ", prefix);
2888
2889         switch (_IOC_TYPE(cmd)) {
2890         case 'd':
2891                 type = "v4l2_int";
2892                 break;
2893         case 'V':
2894                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2895                         type = "v4l2";
2896                         break;
2897                 }
2898                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2899                 return;
2900         default:
2901                 type = "unknown";
2902                 break;
2903         }
2904
2905         switch (_IOC_DIR(cmd)) {
2906         case _IOC_NONE:              dir = "--"; break;
2907         case _IOC_READ:              dir = "r-"; break;
2908         case _IOC_WRITE:             dir = "-w"; break;
2909         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2910         default:                     dir = "*ERR*"; break;
2911         }
2912         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2913                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2914 }
2915 EXPORT_SYMBOL(v4l_printk_ioctl);
2916
2917 static long __video_do_ioctl(struct file *file,
2918                 unsigned int cmd, void *arg)
2919 {
2920         struct video_device *vfd = video_devdata(file);
2921         struct mutex *req_queue_lock = NULL;
2922         struct mutex *lock; /* ioctl serialization mutex */
2923         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2924         bool write_only = false;
2925         struct v4l2_ioctl_info default_info;
2926         const struct v4l2_ioctl_info *info;
2927         void *fh = file->private_data;
2928         struct v4l2_fh *vfh = NULL;
2929         int dev_debug = vfd->dev_debug;
2930         long ret = -ENOTTY;
2931
2932         if (ops == NULL) {
2933                 pr_warn("%s: has no ioctl_ops.\n",
2934                                 video_device_node_name(vfd));
2935                 return ret;
2936         }
2937
2938         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2939                 vfh = file->private_data;
2940
2941         /*
2942          * We need to serialize streamon/off with queueing new requests.
2943          * These ioctls may trigger the cancellation of a streaming
2944          * operation, and that should not be mixed with queueing a new
2945          * request at the same time.
2946          */
2947         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2948             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2949                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2950
2951                 if (mutex_lock_interruptible(req_queue_lock))
2952                         return -ERESTARTSYS;
2953         }
2954
2955         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2956
2957         if (lock && mutex_lock_interruptible(lock)) {
2958                 if (req_queue_lock)
2959                         mutex_unlock(req_queue_lock);
2960                 return -ERESTARTSYS;
2961         }
2962
2963         if (!video_is_registered(vfd)) {
2964                 ret = -ENODEV;
2965                 goto unlock;
2966         }
2967
2968         if (v4l2_is_known_ioctl(cmd)) {
2969                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2970
2971                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2972                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2973                         goto done;
2974
2975                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2976                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2977                         if (ret)
2978                                 goto done;
2979                 }
2980         } else {
2981                 default_info.ioctl = cmd;
2982                 default_info.flags = 0;
2983                 default_info.debug = v4l_print_default;
2984                 info = &default_info;
2985         }
2986
2987         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2988         if (info != &default_info) {
2989                 ret = info->func(ops, file, fh, arg);
2990         } else if (!ops->vidioc_default) {
2991                 ret = -ENOTTY;
2992         } else {
2993                 ret = ops->vidioc_default(file, fh,
2994                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2995                         cmd, arg);
2996         }
2997
2998 done:
2999         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3000                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3001                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3002                         goto unlock;
3003
3004                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3005                 if (ret < 0)
3006                         pr_cont(": error %ld", ret);
3007                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3008                         pr_cont("\n");
3009                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3010                         info->debug(arg, write_only);
3011                 else {
3012                         pr_cont(": ");
3013                         info->debug(arg, write_only);
3014                 }
3015         }
3016
3017 unlock:
3018         if (lock)
3019                 mutex_unlock(lock);
3020         if (req_queue_lock)
3021                 mutex_unlock(req_queue_lock);
3022         return ret;
3023 }
3024
3025 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3026                             void __user **user_ptr, void ***kernel_ptr)
3027 {
3028         int ret = 0;
3029
3030         switch (cmd) {
3031         case VIDIOC_PREPARE_BUF:
3032         case VIDIOC_QUERYBUF:
3033         case VIDIOC_QBUF:
3034         case VIDIOC_DQBUF: {
3035                 struct v4l2_buffer *buf = parg;
3036
3037                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3038                         if (buf->length > VIDEO_MAX_PLANES) {
3039                                 ret = -EINVAL;
3040                                 break;
3041                         }
3042                         *user_ptr = (void __user *)buf->m.planes;
3043                         *kernel_ptr = (void **)&buf->m.planes;
3044                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3045                         ret = 1;
3046                 }
3047                 break;
3048         }
3049
3050         case VIDIOC_G_EDID:
3051         case VIDIOC_S_EDID: {
3052                 struct v4l2_edid *edid = parg;
3053
3054                 if (edid->blocks) {
3055                         if (edid->blocks > 256) {
3056                                 ret = -EINVAL;
3057                                 break;
3058                         }
3059                         *user_ptr = (void __user *)edid->edid;
3060                         *kernel_ptr = (void **)&edid->edid;
3061                         *array_size = edid->blocks * 128;
3062                         ret = 1;
3063                 }
3064                 break;
3065         }
3066
3067         case VIDIOC_S_EXT_CTRLS:
3068         case VIDIOC_G_EXT_CTRLS:
3069         case VIDIOC_TRY_EXT_CTRLS: {
3070                 struct v4l2_ext_controls *ctrls = parg;
3071
3072                 if (ctrls->count != 0) {
3073                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3074                                 ret = -EINVAL;
3075                                 break;
3076                         }
3077                         *user_ptr = (void __user *)ctrls->controls;
3078                         *kernel_ptr = (void **)&ctrls->controls;
3079                         *array_size = sizeof(struct v4l2_ext_control)
3080                                     * ctrls->count;
3081                         ret = 1;
3082                 }
3083                 break;
3084         }
3085         }
3086
3087         return ret;
3088 }
3089
3090 static unsigned int video_translate_cmd(unsigned int cmd)
3091 {
3092         switch (cmd) {
3093 #ifdef CONFIG_COMPAT_32BIT_TIME
3094         case VIDIOC_DQEVENT_TIME32:
3095                 return VIDIOC_DQEVENT;
3096         case VIDIOC_QUERYBUF_TIME32:
3097                 return VIDIOC_QUERYBUF;
3098         case VIDIOC_QBUF_TIME32:
3099                 return VIDIOC_QBUF;
3100         case VIDIOC_DQBUF_TIME32:
3101                 return VIDIOC_DQBUF;
3102         case VIDIOC_PREPARE_BUF_TIME32:
3103                 return VIDIOC_PREPARE_BUF;
3104 #endif
3105         }
3106
3107         return cmd;
3108 }
3109
3110 static int video_get_user(void __user *arg, void *parg, unsigned int cmd,
3111                           bool *always_copy)
3112 {
3113         unsigned int n = _IOC_SIZE(cmd);
3114
3115         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3116                 /* read-only ioctl */
3117                 memset(parg, 0, n);
3118                 return 0;
3119         }
3120
3121         switch (cmd) {
3122 #ifdef CONFIG_COMPAT_32BIT_TIME
3123         case VIDIOC_QUERYBUF_TIME32:
3124         case VIDIOC_QBUF_TIME32:
3125         case VIDIOC_DQBUF_TIME32:
3126         case VIDIOC_PREPARE_BUF_TIME32: {
3127                 struct v4l2_buffer_time32 vb32;
3128                 struct v4l2_buffer *vb = parg;
3129
3130                 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3131                         return -EFAULT;
3132
3133                 *vb = (struct v4l2_buffer) {
3134                         .index          = vb32.index,
3135                         .type           = vb32.type,
3136                         .bytesused      = vb32.bytesused,
3137                         .flags          = vb32.flags,
3138                         .field          = vb32.field,
3139                         .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3140                         .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3141                         .timecode       = vb32.timecode,
3142                         .sequence       = vb32.sequence,
3143                         .memory         = vb32.memory,
3144                         .m.userptr      = vb32.m.userptr,
3145                         .length         = vb32.length,
3146                         .request_fd     = vb32.request_fd,
3147                 };
3148
3149                 if (cmd == VIDIOC_QUERYBUF_TIME32)
3150                         vb->request_fd = 0;
3151
3152                 break;
3153         }
3154 #endif
3155         default:
3156                 /*
3157                  * In some cases, only a few fields are used as input,
3158                  * i.e. when the app sets "index" and then the driver
3159                  * fills in the rest of the structure for the thing
3160                  * with that index.  We only need to copy up the first
3161                  * non-input field.
3162                  */
3163                 if (v4l2_is_known_ioctl(cmd)) {
3164                         u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3165
3166                         if (flags & INFO_FL_CLEAR_MASK)
3167                                 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3168                         *always_copy = flags & INFO_FL_ALWAYS_COPY;
3169                 }
3170
3171                 if (copy_from_user(parg, (void __user *)arg, n))
3172                         return -EFAULT;
3173
3174                 /* zero out anything we don't copy from userspace */
3175                 if (n < _IOC_SIZE(cmd))
3176                         memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
3177                 break;
3178         }
3179
3180         return 0;
3181 }
3182
3183 static int video_put_user(void __user *arg, void *parg, unsigned int cmd)
3184 {
3185         if (!(_IOC_DIR(cmd) & _IOC_READ))
3186                 return 0;
3187
3188         switch (cmd) {
3189 #ifdef CONFIG_COMPAT_32BIT_TIME
3190         case VIDIOC_DQEVENT_TIME32: {
3191                 struct v4l2_event *ev = parg;
3192                 struct v4l2_event_time32 ev32 = {
3193                         .type           = ev->type,
3194                         .pending        = ev->pending,
3195                         .sequence       = ev->sequence,
3196                         .timestamp.tv_sec  = ev->timestamp.tv_sec,
3197                         .timestamp.tv_nsec = ev->timestamp.tv_nsec,
3198                         .id             = ev->id,
3199                 };
3200
3201                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3202                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3203
3204                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3205                         return -EFAULT;
3206                 break;
3207         }
3208         case VIDIOC_QUERYBUF_TIME32:
3209         case VIDIOC_QBUF_TIME32:
3210         case VIDIOC_DQBUF_TIME32:
3211         case VIDIOC_PREPARE_BUF_TIME32: {
3212                 struct v4l2_buffer *vb = parg;
3213                 struct v4l2_buffer_time32 vb32 = {
3214                         .index          = vb->index,
3215                         .type           = vb->type,
3216                         .bytesused      = vb->bytesused,
3217                         .flags          = vb->flags,
3218                         .field          = vb->field,
3219                         .timestamp.tv_sec       = vb->timestamp.tv_sec,
3220                         .timestamp.tv_usec      = vb->timestamp.tv_usec,
3221                         .timecode       = vb->timecode,
3222                         .sequence       = vb->sequence,
3223                         .memory         = vb->memory,
3224                         .m.userptr      = vb->m.userptr,
3225                         .length         = vb->length,
3226                         .request_fd     = vb->request_fd,
3227                 };
3228
3229                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3230                         return -EFAULT;
3231                 break;
3232         }
3233 #endif
3234         default:
3235                 /*  Copy results into user buffer  */
3236                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3237                         return -EFAULT;
3238                 break;
3239         }
3240
3241         return 0;
3242 }
3243
3244 long
3245 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3246                v4l2_kioctl func)
3247 {
3248         char    sbuf[128];
3249         void    *mbuf = NULL;
3250         void    *parg = (void *)arg;
3251         long    err  = -EINVAL;
3252         bool    has_array_args;
3253         bool    always_copy = false;
3254         size_t  array_size = 0;
3255         void __user *user_ptr = NULL;
3256         void    **kernel_ptr = NULL;
3257         unsigned int cmd = video_translate_cmd(orig_cmd);
3258         const size_t ioc_size = _IOC_SIZE(cmd);
3259
3260         /*  Copy arguments into temp kernel buffer  */
3261         if (_IOC_DIR(cmd) != _IOC_NONE) {
3262                 if (ioc_size <= sizeof(sbuf)) {
3263                         parg = sbuf;
3264                 } else {
3265                         /* too big to allocate from stack */
3266                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3267                         if (NULL == mbuf)
3268                                 return -ENOMEM;
3269                         parg = mbuf;
3270                 }
3271
3272                 err = video_get_user((void __user *)arg, parg, orig_cmd,
3273                                      &always_copy);
3274                 if (err)
3275                         goto out;
3276         }
3277
3278         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3279         if (err < 0)
3280                 goto out;
3281         has_array_args = err;
3282
3283         if (has_array_args) {
3284                 /*
3285                  * When adding new types of array args, make sure that the
3286                  * parent argument to ioctl (which contains the pointer to the
3287                  * array) fits into sbuf (so that mbuf will still remain
3288                  * unused up to here).
3289                  */
3290                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3291                 err = -ENOMEM;
3292                 if (NULL == mbuf)
3293                         goto out_array_args;
3294                 err = -EFAULT;
3295                 if (copy_from_user(mbuf, user_ptr, array_size))
3296                         goto out_array_args;
3297                 *kernel_ptr = mbuf;
3298         }
3299
3300         /* Handles IOCTL */
3301         err = func(file, cmd, parg);
3302         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3303                 err = -ENOTTY;
3304                 goto out;
3305         }
3306
3307         if (err == 0) {
3308                 if (cmd == VIDIOC_DQBUF)
3309                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3310                 else if (cmd == VIDIOC_QBUF)
3311                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3312         }
3313
3314         if (has_array_args) {
3315                 *kernel_ptr = (void __force *)user_ptr;
3316                 if (copy_to_user(user_ptr, mbuf, array_size))
3317                         err = -EFAULT;
3318                 goto out_array_args;
3319         }
3320         /*
3321          * Some ioctls can return an error, but still have valid
3322          * results that must be returned.
3323          */
3324         if (err < 0 && !always_copy)
3325                 goto out;
3326
3327 out_array_args:
3328         if (video_put_user((void __user *)arg, parg, orig_cmd))
3329                 err = -EFAULT;
3330 out:
3331         kvfree(mbuf);
3332         return err;
3333 }
3334
3335 long video_ioctl2(struct file *file,
3336                unsigned int cmd, unsigned long arg)
3337 {
3338         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3339 }
3340 EXPORT_SYMBOL(video_ioctl2);