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, <[email protected]> (version 1)
   8  *              Mauro Carvalho Chehab <[email protected]> (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, 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                 (int)sizeof(p->description), p->description);
 274 }
 275
 276 static void v4l_print_format(const void *arg, bool write_only)
 277 {
 278         const struct v4l2_format *p = arg;
 279         const struct v4l2_pix_format *pix;
 280         const struct v4l2_pix_format_mplane *mp;
 281         const struct v4l2_vbi_format *vbi;
 282         const struct v4l2_sliced_vbi_format *sliced;
 283         const struct v4l2_window *win;
 284         const struct v4l2_sdr_format *sdr;
 285         const struct v4l2_meta_format *meta;
 286         u32 planes;
 287         unsigned i;
 288
 289         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 290         switch (p->type) {
 291         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 292         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 293                 pix = &p->fmt.pix;
 294                 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",
 295                         pix->width, pix->height,
 296                         (pix->pixelformat & 0xff),
 297                         (pix->pixelformat >>  8) & 0xff,
 298                         (pix->pixelformat >> 16) & 0xff,
 299                         (pix->pixelformat >> 24) & 0xff,
 300                         prt_names(pix->field, v4l2_field_names),
 301                         pix->bytesperline, pix->sizeimage,
 302                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 303                         pix->quantization, pix->xfer_func);
 304                 break;
 305         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 306         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 307                 mp = &p->fmt.pix_mp;
 308                 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",
 309                         mp->width, mp->height,
 310                         (mp->pixelformat & 0xff),
 311                         (mp->pixelformat >>  8) & 0xff,
 312                         (mp->pixelformat >> 16) & 0xff,
 313                         (mp->pixelformat >> 24) & 0xff,
 314                         prt_names(mp->field, v4l2_field_names),
 315                         mp->colorspace, mp->num_planes, mp->flags,
 316                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 317                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 318                 for (i = 0; i < planes; i++)
 319                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 320                                         mp->plane_fmt[i].bytesperline,
 321                                         mp->plane_fmt[i].sizeimage);
 322                 break;
 323         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 324         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 325                 win = &p->fmt.win;
 326                 /* Note: we can't print the clip list here since the clips
 327                  * pointer is a userspace pointer, not a kernelspace
 328                  * pointer. */
 329                 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",
 330                         win->w.width, win->w.height, win->w.left, win->w.top,
 331                         prt_names(win->field, v4l2_field_names),
 332                         win->chromakey, win->clipcount, win->clips,
 333                         win->bitmap, win->global_alpha);
 334                 break;
 335         case V4L2_BUF_TYPE_VBI_CAPTURE:
 336         case V4L2_BUF_TYPE_VBI_OUTPUT:
 337                 vbi = &p->fmt.vbi;
 338                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 339                         vbi->sampling_rate, vbi->offset,
 340                         vbi->samples_per_line,
 341                         (vbi->sample_format & 0xff),
 342                         (vbi->sample_format >>  8) & 0xff,
 343                         (vbi->sample_format >> 16) & 0xff,
 344                         (vbi->sample_format >> 24) & 0xff,
 345                         vbi->start[0], vbi->start[1],
 346                         vbi->count[0], vbi->count[1]);
 347                 break;
 348         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 349         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 350                 sliced = &p->fmt.sliced;
 351                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 352                                 sliced->service_set, sliced->io_size);
 353                 for (i = 0; i < 24; i++)
 354                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 355                                 sliced->service_lines[0][i],
 356                                 sliced->service_lines[1][i]);
 357                 break;
 358         case V4L2_BUF_TYPE_SDR_CAPTURE:
 359         case V4L2_BUF_TYPE_SDR_OUTPUT:
 360                 sdr = &p->fmt.sdr;
 361                 pr_cont(", pixelformat=%c%c%c%c\n",
 362                         (sdr->pixelformat >>  0) & 0xff,
 363                         (sdr->pixelformat >>  8) & 0xff,
 364                         (sdr->pixelformat >> 16) & 0xff,
 365                         (sdr->pixelformat >> 24) & 0xff);
 366                 break;
 367         case V4L2_BUF_TYPE_META_CAPTURE:
 368         case V4L2_BUF_TYPE_META_OUTPUT:
 369                 meta = &p->fmt.meta;
 370                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 371                         (meta->dataformat >>  0) & 0xff,
 372                         (meta->dataformat >>  8) & 0xff,
 373                         (meta->dataformat >> 16) & 0xff,
 374                         (meta->dataformat >> 24) & 0xff,
 375                         meta->buffersize);
 376                 break;
 377         }
 378 }
 379
 380 static void v4l_print_framebuffer(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_framebuffer *p = arg;
 383
 384         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",
 385                         p->capability, p->flags, p->base,
 386                         p->fmt.width, p->fmt.height,
 387                         (p->fmt.pixelformat & 0xff),
 388                         (p->fmt.pixelformat >>  8) & 0xff,
 389                         (p->fmt.pixelformat >> 16) & 0xff,
 390                         (p->fmt.pixelformat >> 24) & 0xff,
 391                         p->fmt.bytesperline, p->fmt.sizeimage,
 392                         p->fmt.colorspace);
 393 }
 394
 395 static void v4l_print_buftype(const void *arg, bool write_only)
 396 {
 397         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 398 }
 399
 400 static void v4l_print_modulator(const void *arg, bool write_only)
 401 {
 402         const struct v4l2_modulator *p = arg;
 403
 404         if (write_only)
 405                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 406         else
 407                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 408                         p->index, (int)sizeof(p->name), p->name, p->capability,
 409                         p->rangelow, p->rangehigh, p->txsubchans);
 410 }
 411
 412 static void v4l_print_tuner(const void *arg, bool write_only)
 413 {
 414         const struct v4l2_tuner *p = arg;
 415
 416         if (write_only)
 417                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 418         else
 419                 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",
 420                         p->index, (int)sizeof(p->name), p->name, p->type,
 421                         p->capability, p->rangelow,
 422                         p->rangehigh, p->signal, p->afc,
 423                         p->rxsubchans, p->audmode);
 424 }
 425
 426 static void v4l_print_frequency(const void *arg, bool write_only)
 427 {
 428         const struct v4l2_frequency *p = arg;
 429
 430         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 431                                 p->tuner, p->type, p->frequency);
 432 }
 433
 434 static void v4l_print_standard(const void *arg, bool write_only)
 435 {
 436         const struct v4l2_standard *p = arg;
 437
 438         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 439                 p->index,
 440                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 441                 p->frameperiod.numerator,
 442                 p->frameperiod.denominator,
 443                 p->framelines);
 444 }
 445
 446 static void v4l_print_std(const void *arg, bool write_only)
 447 {
 448         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 449 }
 450
 451 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 452 {
 453         const struct v4l2_hw_freq_seek *p = arg;
 454
 455         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 456                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 457                 p->rangelow, p->rangehigh);
 458 }
 459
 460 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 461 {
 462         const struct v4l2_requestbuffers *p = arg;
 463
 464         pr_cont("count=%d, type=%s, memory=%s\n",
 465                 p->count,
 466                 prt_names(p->type, v4l2_type_names),
 467                 prt_names(p->memory, v4l2_memory_names));
 468 }
 469
 470 static void v4l_print_buffer(const void *arg, bool write_only)
 471 {
 472         const struct v4l2_buffer *p = arg;
 473         const struct v4l2_timecode *tc = &p->timecode;
 474         const struct v4l2_plane *plane;
 475         int i;
 476
 477         pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 478                         (int)p->timestamp.tv_sec / 3600,
 479                         ((int)p->timestamp.tv_sec / 60) % 60,
 480                         ((int)p->timestamp.tv_sec % 60),
 481                         (long)p->timestamp.tv_usec,
 482                         p->index,
 483                         prt_names(p->type, v4l2_type_names), p->request_fd,
 484                         p->flags, prt_names(p->field, v4l2_field_names),
 485                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 486
 487         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 488                 pr_cont("\n");
 489                 for (i = 0; i < p->length; ++i) {
 490                         plane = &p->m.planes[i];
 491                         printk(KERN_DEBUG
 492                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 493                                 i, plane->bytesused, plane->data_offset,
 494                                 plane->m.userptr, plane->length);
 495                 }
 496         } else {
 497                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 498                         p->bytesused, p->m.userptr, p->length);
 499         }
 500
 501         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 502                         tc->hours, tc->minutes, tc->seconds,
 503                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 504 }
 505
 506 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 507 {
 508         const struct v4l2_exportbuffer *p = arg;
 509
 510         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 511                 p->fd, prt_names(p->type, v4l2_type_names),
 512                 p->index, p->plane, p->flags);
 513 }
 514
 515 static void v4l_print_create_buffers(const void *arg, bool write_only)
 516 {
 517         const struct v4l2_create_buffers *p = arg;
 518
 519         pr_cont("index=%d, count=%d, memory=%s, ",
 520                         p->index, p->count,
 521                         prt_names(p->memory, v4l2_memory_names));
 522         v4l_print_format(&p->format, write_only);
 523 }
 524
 525 static void v4l_print_streamparm(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_streamparm *p = arg;
 528
 529         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 530
 531         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 532             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 533                 const struct v4l2_captureparm *c = &p->parm.capture;
 534
 535                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 536                         c->capability, c->capturemode,
 537                         c->timeperframe.numerator, c->timeperframe.denominator,
 538                         c->extendedmode, c->readbuffers);
 539         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 540                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 541                 const struct v4l2_outputparm *c = &p->parm.output;
 542
 543                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 544                         c->capability, c->outputmode,
 545                         c->timeperframe.numerator, c->timeperframe.denominator,
 546                         c->extendedmode, c->writebuffers);
 547         } else {
 548                 pr_cont("\n");
 549         }
 550 }
 551
 552 static void v4l_print_queryctrl(const void *arg, bool write_only)
 553 {
 554         const struct v4l2_queryctrl *p = arg;
 555
 556         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 557                         p->id, p->type, (int)sizeof(p->name), p->name,
 558                         p->minimum, p->maximum,
 559                         p->step, p->default_value, p->flags);
 560 }
 561
 562 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 563 {
 564         const struct v4l2_query_ext_ctrl *p = arg;
 565
 566         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",
 567                         p->id, p->type, (int)sizeof(p->name), p->name,
 568                         p->minimum, p->maximum,
 569                         p->step, p->default_value, p->flags,
 570                         p->elem_size, p->elems, p->nr_of_dims,
 571                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 572 }
 573
 574 static void v4l_print_querymenu(const void *arg, bool write_only)
 575 {
 576         const struct v4l2_querymenu *p = arg;
 577
 578         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 579 }
 580
 581 static void v4l_print_control(const void *arg, bool write_only)
 582 {
 583         const struct v4l2_control *p = arg;
 584
 585         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 586 }
 587
 588 static void v4l_print_ext_controls(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_ext_controls *p = arg;
 591         int i;
 592
 593         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 594                         p->which, p->count, p->error_idx, p->request_fd);
 595         for (i = 0; i < p->count; i++) {
 596                 if (!p->controls[i].size)
 597                         pr_cont(", id/val=0x%x/0x%x",
 598                                 p->controls[i].id, p->controls[i].value);
 599                 else
 600                         pr_cont(", id/size=0x%x/%u",
 601                                 p->controls[i].id, p->controls[i].size);
 602         }
 603         pr_cont("\n");
 604 }
 605
 606 static void v4l_print_cropcap(const void *arg, bool write_only)
 607 {
 608         const struct v4l2_cropcap *p = arg;
 609
 610         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 611                 prt_names(p->type, v4l2_type_names),
 612                 p->bounds.width, p->bounds.height,
 613                 p->bounds.left, p->bounds.top,
 614                 p->defrect.width, p->defrect.height,
 615                 p->defrect.left, p->defrect.top,
 616                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 617 }
 618
 619 static void v4l_print_crop(const void *arg, bool write_only)
 620 {
 621         const struct v4l2_crop *p = arg;
 622
 623         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 624                 prt_names(p->type, v4l2_type_names),
 625                 p->c.width, p->c.height,
 626                 p->c.left, p->c.top);
 627 }
 628
 629 static void v4l_print_selection(const void *arg, bool write_only)
 630 {
 631         const struct v4l2_selection *p = arg;
 632
 633         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 634                 prt_names(p->type, v4l2_type_names),
 635                 p->target, p->flags,
 636                 p->r.width, p->r.height, p->r.left, p->r.top);
 637 }
 638
 639 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_jpegcompression *p = arg;
 642
 643         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 644                 p->quality, p->APPn, p->APP_len,
 645                 p->COM_len, p->jpeg_markers);
 646 }
 647
 648 static void v4l_print_enc_idx(const void *arg, bool write_only)
 649 {
 650         const struct v4l2_enc_idx *p = arg;
 651
 652         pr_cont("entries=%d, entries_cap=%d\n",
 653                         p->entries, p->entries_cap);
 654 }
 655
 656 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_encoder_cmd *p = arg;
 659
 660         pr_cont("cmd=%d, flags=0x%x\n",
 661                         p->cmd, p->flags);
 662 }
 663
 664 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 665 {
 666         const struct v4l2_decoder_cmd *p = arg;
 667
 668         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 669
 670         if (p->cmd == V4L2_DEC_CMD_START)
 671                 pr_info("speed=%d, format=%u\n",
 672                                 p->start.speed, p->start.format);
 673         else if (p->cmd == V4L2_DEC_CMD_STOP)
 674                 pr_info("pts=%llu\n", p->stop.pts);
 675 }
 676
 677 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 678 {
 679         const struct v4l2_dbg_chip_info *p = arg;
 680
 681         pr_cont("type=%u, ", p->match.type);
 682         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 683                 pr_cont("name=%.*s, ",
 684                                 (int)sizeof(p->match.name), p->match.name);
 685         else
 686                 pr_cont("addr=%u, ", p->match.addr);
 687         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 688 }
 689
 690 static void v4l_print_dbg_register(const void *arg, bool write_only)
 691 {
 692         const struct v4l2_dbg_register *p = arg;
 693
 694         pr_cont("type=%u, ", p->match.type);
 695         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 696                 pr_cont("name=%.*s, ",
 697                                 (int)sizeof(p->match.name), p->match.name);
 698         else
 699                 pr_cont("addr=%u, ", p->match.addr);
 700         pr_cont("reg=0x%llx, val=0x%llx\n",
 701                         p->reg, p->val);
 702 }
 703
 704 static void v4l_print_dv_timings(const void *arg, bool write_only)
 705 {
 706         const struct v4l2_dv_timings *p = arg;
 707
 708         switch (p->type) {
 709         case V4L2_DV_BT_656_1120:
 710                 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",
 711                                 p->bt.interlaced, p->bt.pixelclock,
 712                                 p->bt.width, p->bt.height,
 713                                 p->bt.polarities, p->bt.hfrontporch,
 714                                 p->bt.hsync, p->bt.hbackporch,
 715                                 p->bt.vfrontporch, p->bt.vsync,
 716                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 717                                 p->bt.il_vsync, p->bt.il_vbackporch,
 718                                 p->bt.standards, p->bt.flags);
 719                 break;
 720         default:
 721                 pr_cont("type=%d\n", p->type);
 722                 break;
 723         }
 724 }
 725
 726 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 727 {
 728         const struct v4l2_enum_dv_timings *p = arg;
 729
 730         pr_cont("index=%u, ", p->index);
 731         v4l_print_dv_timings(&p->timings, write_only);
 732 }
 733
 734 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_dv_timings_cap *p = arg;
 737
 738         switch (p->type) {
 739         case V4L2_DV_BT_656_1120:
 740                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 741                         p->bt.min_width, p->bt.max_width,
 742                         p->bt.min_height, p->bt.max_height,
 743                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 744                         p->bt.standards, p->bt.capabilities);
 745                 break;
 746         default:
 747                 pr_cont("type=%u\n", p->type);
 748                 break;
 749         }
 750 }
 751
 752 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 753 {
 754         const struct v4l2_frmsizeenum *p = arg;
 755
 756         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 757                         p->index,
 758                         (p->pixel_format & 0xff),
 759                         (p->pixel_format >>  8) & 0xff,
 760                         (p->pixel_format >> 16) & 0xff,
 761                         (p->pixel_format >> 24) & 0xff,
 762                         p->type);
 763         switch (p->type) {
 764         case V4L2_FRMSIZE_TYPE_DISCRETE:
 765                 pr_cont(", wxh=%ux%u\n",
 766                         p->discrete.width, p->discrete.height);
 767                 break;
 768         case V4L2_FRMSIZE_TYPE_STEPWISE:
 769                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 770                                 p->stepwise.min_width,
 771                                 p->stepwise.min_height,
 772                                 p->stepwise.max_width,
 773                                 p->stepwise.max_height,
 774                                 p->stepwise.step_width,
 775                                 p->stepwise.step_height);
 776                 break;
 777         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 778                 /* fall through */
 779         default:
 780                 pr_cont("\n");
 781                 break;
 782         }
 783 }
 784
 785 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 786 {
 787         const struct v4l2_frmivalenum *p = arg;
 788
 789         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 790                         p->index,
 791                         (p->pixel_format & 0xff),
 792                         (p->pixel_format >>  8) & 0xff,
 793                         (p->pixel_format >> 16) & 0xff,
 794                         (p->pixel_format >> 24) & 0xff,
 795                         p->width, p->height, p->type);
 796         switch (p->type) {
 797         case V4L2_FRMIVAL_TYPE_DISCRETE:
 798                 pr_cont(", fps=%d/%d\n",
 799                                 p->discrete.numerator,
 800                                 p->discrete.denominator);
 801                 break;
 802         case V4L2_FRMIVAL_TYPE_STEPWISE:
 803                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 804                                 p->stepwise.min.numerator,
 805                                 p->stepwise.min.denominator,
 806                                 p->stepwise.max.numerator,
 807                                 p->stepwise.max.denominator,
 808                                 p->stepwise.step.numerator,
 809                                 p->stepwise.step.denominator);
 810                 break;
 811         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 812                 /* fall through */
 813         default:
 814                 pr_cont("\n");
 815                 break;
 816         }
 817 }
 818
 819 static void v4l_print_event(const void *arg, bool write_only)
 820 {
 821         const struct v4l2_event *p = arg;
 822         const struct v4l2_event_ctrl *c;
 823
 824         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 825                         p->type, p->pending, p->sequence, p->id,
 826                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 827         switch (p->type) {
 828         case V4L2_EVENT_VSYNC:
 829                 printk(KERN_DEBUG "field=%s\n",
 830                         prt_names(p->u.vsync.field, v4l2_field_names));
 831                 break;
 832         case V4L2_EVENT_CTRL:
 833                 c = &p->u.ctrl;
 834                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 835                         c->changes, c->type);
 836                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 837                         pr_cont("value64=%lld, ", c->value64);
 838                 else
 839                         pr_cont("value=%d, ", c->value);
 840                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 841                         c->flags, c->minimum, c->maximum,
 842                         c->step, c->default_value);
 843                 break;
 844         case V4L2_EVENT_FRAME_SYNC:
 845                 pr_cont("frame_sequence=%u\n",
 846                         p->u.frame_sync.frame_sequence);
 847                 break;
 848         }
 849 }
 850
 851 static void v4l_print_event_subscription(const void *arg, bool write_only)
 852 {
 853         const struct v4l2_event_subscription *p = arg;
 854
 855         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 856                         p->type, p->id, p->flags);
 857 }
 858
 859 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 860 {
 861         const struct v4l2_sliced_vbi_cap *p = arg;
 862         int i;
 863
 864         pr_cont("type=%s, service_set=0x%08x\n",
 865                         prt_names(p->type, v4l2_type_names), p->service_set);
 866         for (i = 0; i < 24; i++)
 867                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 868                                 p->service_lines[0][i],
 869                                 p->service_lines[1][i]);
 870 }
 871
 872 static void v4l_print_freq_band(const void *arg, bool write_only)
 873 {
 874         const struct v4l2_frequency_band *p = arg;
 875
 876         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 877                         p->tuner, p->type, p->index,
 878                         p->capability, p->rangelow,
 879                         p->rangehigh, p->modulation);
 880 }
 881
 882 static void v4l_print_edid(const void *arg, bool write_only)
 883 {
 884         const struct v4l2_edid *p = arg;
 885
 886         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 887                 p->pad, p->start_block, p->blocks);
 888 }
 889
 890 static void v4l_print_u32(const void *arg, bool write_only)
 891 {
 892         pr_cont("value=%u\n", *(const u32 *)arg);
 893 }
 894
 895 static void v4l_print_newline(const void *arg, bool write_only)
 896 {
 897         pr_cont("\n");
 898 }
 899
 900 static void v4l_print_default(const void *arg, bool write_only)
 901 {
 902         pr_cont("driver-specific ioctl\n");
 903 }
 904
 905 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 906 {
 907         __u32 i;
 908
 909         /* zero the reserved fields */
 910         c->reserved[0] = 0;
 911         for (i = 0; i < c->count; i++)
 912                 c->controls[i].reserved2[0] = 0;
 913
 914         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 915            when using extended controls.
 916            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 917            is it allowed for backwards compatibility.
 918          */
 919         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 920                 return 0;
 921         if (!c->which)
 922                 return 1;
 923         /* Check that all controls are from the same control class. */
 924         for (i = 0; i < c->count; i++) {
 925                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 926                         c->error_idx = i;
 927                         return 0;
 928                 }
 929         }
 930         return 1;
 931 }
 932
 933 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 934 {
 935         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 936                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 937                              V4L2_CAP_VIDEO_OUTPUT |
 938                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 939                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 940         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 941                               V4L2_CAP_META_OUTPUT;
 942         struct video_device *vfd = video_devdata(file);
 943         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 944         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 945                       (vfd->device_caps & vid_caps);
 946         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 947         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 948         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 949         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 950                        (vfd->device_caps & meta_caps);
 951         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 952         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 953
 954         if (ops == NULL)
 955                 return -EINVAL;
 956
 957         switch (type) {
 958         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 959                 if ((is_vid || is_tch) && is_rx &&
 960                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 961                         return 0;
 962                 break;
 963         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 964                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 965                         return 0;
 966                 break;
 967         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 968                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 969                         return 0;
 970                 break;
 971         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 972                 if (is_vid && is_tx &&
 973                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 977                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 981                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 982                         return 0;
 983                 break;
 984         case V4L2_BUF_TYPE_VBI_CAPTURE:
 985                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 986                         return 0;
 987                 break;
 988         case V4L2_BUF_TYPE_VBI_OUTPUT:
 989                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 990                         return 0;
 991                 break;
 992         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 993                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 994                         return 0;
 995                 break;
 996         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 997                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 998                         return 0;
 999                 break;
1000         case V4L2_BUF_TYPE_SDR_CAPTURE:
1001                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
1002                         return 0;
1003                 break;
1004         case V4L2_BUF_TYPE_SDR_OUTPUT:
1005                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
1006                         return 0;
1007                 break;
1008         case V4L2_BUF_TYPE_META_CAPTURE:
1009                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
1010                         return 0;
1011                 break;
1012         case V4L2_BUF_TYPE_META_OUTPUT:
1013                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1014                         return 0;
1015                 break;
1016         default:
1017                 break;
1018         }
1019         return -EINVAL;
1020 }
1021
1022 static void v4l_sanitize_format(struct v4l2_format *fmt)
1023 {
1024         unsigned int offset;
1025
1026         /* Make sure num_planes is not bogus */
1027         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1028             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1029                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1030                                                VIDEO_MAX_PLANES);
1031
1032         /*
1033          * The v4l2_pix_format structure has been extended with fields that were
1034          * not previously required to be set to zero by applications. The priv
1035          * field, when set to a magic value, indicates the the extended fields
1036          * are valid. Otherwise they will contain undefined values. To simplify
1037          * the API towards drivers zero the extended fields and set the priv
1038          * field to the magic value when the extended pixel format structure
1039          * isn't used by applications.
1040          */
1041
1042         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1043             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1044                 return;
1045
1046         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1047                 return;
1048
1049         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1050
1051         offset = offsetof(struct v4l2_pix_format, priv)
1052                + sizeof(fmt->fmt.pix.priv);
1053         memset(((void *)&fmt->fmt.pix) + offset, 0,
1054                sizeof(fmt->fmt.pix) - offset);
1055 }
1056
1057 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1058                                 struct file *file, void *fh, void *arg)
1059 {
1060         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1061         struct video_device *vfd = video_devdata(file);
1062         int ret;
1063
1064         cap->version = LINUX_VERSION_CODE;
1065         cap->device_caps = vfd->device_caps;
1066         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1067
1068         ret = ops->vidioc_querycap(file, fh, cap);
1069
1070         /*
1071          * Drivers must not change device_caps, so check for this and
1072          * warn if this happened.
1073          */
1074         WARN_ON(cap->device_caps != vfd->device_caps);
1075         /*
1076          * Check that capabilities is a superset of
1077          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1078          */
1079         WARN_ON((cap->capabilities &
1080                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1081                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1082         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1083         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1084
1085         return ret;
1086 }
1087
1088 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1089                                 struct file *file, void *fh, void *arg)
1090 {
1091         struct video_device *vfd = video_devdata(file);
1092         int ret;
1093
1094         ret = v4l_enable_media_source(vfd);
1095         if (ret)
1096                 return ret;
1097         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1098 }
1099
1100 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1101                                 struct file *file, void *fh, void *arg)
1102 {
1103         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1104 }
1105
1106 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1107                                 struct file *file, void *fh, void *arg)
1108 {
1109         struct video_device *vfd;
1110         u32 *p = arg;
1111
1112         vfd = video_devdata(file);
1113         *p = v4l2_prio_max(vfd->prio);
1114         return 0;
1115 }
1116
1117 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1118                                 struct file *file, void *fh, void *arg)
1119 {
1120         struct video_device *vfd;
1121         struct v4l2_fh *vfh;
1122         u32 *p = arg;
1123
1124         vfd = video_devdata(file);
1125         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1126                 return -ENOTTY;
1127         vfh = file->private_data;
1128         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1129 }
1130
1131 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1132                                 struct file *file, void *fh, void *arg)
1133 {
1134         struct video_device *vfd = video_devdata(file);
1135         struct v4l2_input *p = arg;
1136
1137         /*
1138          * We set the flags for CAP_DV_TIMINGS &
1139          * CAP_STD here based on ioctl handler provided by the
1140          * driver. If the driver doesn't support these
1141          * for a specific input, it must override these flags.
1142          */
1143         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1144                 p->capabilities |= V4L2_IN_CAP_STD;
1145
1146         return ops->vidioc_enum_input(file, fh, p);
1147 }
1148
1149 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1150                                 struct file *file, void *fh, void *arg)
1151 {
1152         struct video_device *vfd = video_devdata(file);
1153         struct v4l2_output *p = arg;
1154
1155         /*
1156          * We set the flags for CAP_DV_TIMINGS &
1157          * CAP_STD here based on ioctl handler provided by the
1158          * driver. If the driver doesn't support these
1159          * for a specific output, it must override these flags.
1160          */
1161         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1162                 p->capabilities |= V4L2_OUT_CAP_STD;
1163
1164         return ops->vidioc_enum_output(file, fh, p);
1165 }
1166
1167 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1168 {
1169         const unsigned sz = sizeof(fmt->description);
1170         const char *descr = NULL;
1171         u32 flags = 0;
1172
1173         /*
1174          * We depart from the normal coding style here since the descriptions
1175          * should be aligned so it is easy to see which descriptions will be
1176          * longer than 31 characters (the max length for a description).
1177          * And frankly, this is easier to read anyway.
1178          *
1179          * Note that gcc will use O(log N) comparisons to find the right case.
1180          */
1181         switch (fmt->pixelformat) {
1182         /* Max description length mask: descr = "0123456789012345678901234567890" */
1183         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1184         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1185         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1186         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1187         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1188         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1189         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1190         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1191         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1192         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1193         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1194         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1195         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1196         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1197         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1198         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1199         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1200         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1201         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1202         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1203         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1204         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1205         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1206         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1207         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1208         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1209         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1210         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1211         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1212         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1213         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1214         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1215         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1216         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1217         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1218         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1219         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1220         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1221         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1222         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1223         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1224         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1225         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1226         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1227         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1228         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1229         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1230         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1231         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1232         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1233         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1234         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1235         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1236         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1237         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1238         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1239         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1240         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1241         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1242         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1243         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1244         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1245         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1246         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1247         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1248         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1249         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1250         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1251         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1252         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1253         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1254         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1255         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1256         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1257         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1258         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1259         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1260         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1261         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1262         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1263         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1264         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1265         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1266         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1267         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1268         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1269         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1270         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1271         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1272         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1273         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1274         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1275         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1276         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1277         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1278         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1279         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1280         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1281         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1282         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1283         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1284         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1285         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1286         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1287         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1288         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1289         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1290         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1291         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1292         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1293         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1294         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1295         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1296         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1297         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1298         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1299         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1300         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1301         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1302         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1303         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1304         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1305         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1306         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1307         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1308         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1309         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1310         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1311         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1312         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1313         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1314         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1315         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1316         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1317         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1318         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1319         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1320         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1321         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1322         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1323         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1324         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1325         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1326         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1327         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1328         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1329         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1330         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1331         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1332         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1333         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1334         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1335         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1336         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1337         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1338         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1339         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1340         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1341         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1342         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1343         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1344         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1345         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1346         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1347         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1348         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1349
1350         default:
1351                 /* Compressed formats */
1352                 flags = V4L2_FMT_FLAG_COMPRESSED;
1353                 switch (fmt->pixelformat) {
1354                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1355                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1356                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1357                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1358                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1359                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1360                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1361                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1362                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1363                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1364                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1365                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1366                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1367                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1368                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1369                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1370                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1371                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1372                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1373                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1374                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1375                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1376                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1377                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1378                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1379                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1380                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1381                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1382                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1383                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1384                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1385                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1386                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1387                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1388                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1389                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1390                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1391                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1392                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1393                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1394                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1395                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1396                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1397                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1398                 default:
1399                         if (fmt->description[0])
1400                                 return;
1401                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1402                         flags = 0;
1403                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1404                                         (char)(fmt->pixelformat & 0x7f),
1405                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1406                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1407                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1408                                         (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1409                         break;
1410                 }
1411         }
1412
1413         if (descr)
1414                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1415         fmt->flags |= flags;
1416 }
1417
1418 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1419                                 struct file *file, void *fh, void *arg)
1420 {
1421         struct video_device *vdev = video_devdata(file);
1422         struct v4l2_fmtdesc *p = arg;
1423         int ret = check_fmt(file, p->type);
1424         u32 cap_mask;
1425
1426         if (ret)
1427                 return ret;
1428         ret = -EINVAL;
1429
1430         switch (p->type) {
1431         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1432         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1433                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1434                            V4L2_CAP_VIDEO_M2M_MPLANE;
1435                 if (!!(vdev->device_caps & cap_mask) !=
1436                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1437                         break;
1438
1439                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1440                         break;
1441                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1442                 break;
1443         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1444                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1445                         break;
1446                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1447                 break;
1448         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1449         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1450                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1451                            V4L2_CAP_VIDEO_M2M_MPLANE;
1452                 if (!!(vdev->device_caps & cap_mask) !=
1453                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1454                         break;
1455
1456                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1457                         break;
1458                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1459                 break;
1460         case V4L2_BUF_TYPE_SDR_CAPTURE:
1461                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1462                         break;
1463                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1464                 break;
1465         case V4L2_BUF_TYPE_SDR_OUTPUT:
1466                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1467                         break;
1468                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1469                 break;
1470         case V4L2_BUF_TYPE_META_CAPTURE:
1471                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1472                         break;
1473                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1474                 break;
1475         case V4L2_BUF_TYPE_META_OUTPUT:
1476                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1477                         break;
1478                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1479                 break;
1480         }
1481         if (ret == 0)
1482                 v4l_fill_fmtdesc(p);
1483         return ret;
1484 }
1485
1486 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1487 {
1488         /*
1489          * The v4l2_pix_format structure contains fields that make no sense for
1490          * touch. Set them to default values in this case.
1491          */
1492
1493         p->field = V4L2_FIELD_NONE;
1494         p->colorspace = V4L2_COLORSPACE_RAW;
1495         p->flags = 0;
1496         p->ycbcr_enc = 0;
1497         p->quantization = 0;
1498         p->xfer_func = 0;
1499 }
1500
1501 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1502                                 struct file *file, void *fh, void *arg)
1503 {
1504         struct v4l2_format *p = arg;
1505         struct video_device *vfd = video_devdata(file);
1506         int ret = check_fmt(file, p->type);
1507
1508         if (ret)
1509                 return ret;
1510
1511         /*
1512          * fmt can't be cleared for these overlay types due to the 'clips'
1513          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1514          * Those are provided by the user. So handle these two overlay types
1515          * first, and then just do a simple memset for the other types.
1516          */
1517         switch (p->type) {
1518         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1519         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1520                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1521                 u32 clipcount = p->fmt.win.clipcount;
1522                 void __user *bitmap = p->fmt.win.bitmap;
1523
1524                 memset(&p->fmt, 0, sizeof(p->fmt));
1525                 p->fmt.win.clips = clips;
1526                 p->fmt.win.clipcount = clipcount;
1527                 p->fmt.win.bitmap = bitmap;
1528                 break;
1529         }
1530         default:
1531                 memset(&p->fmt, 0, sizeof(p->fmt));
1532                 break;
1533         }
1534
1535         switch (p->type) {
1536         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1537                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1538                         break;
1539                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1540                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1541                 /* just in case the driver zeroed it again */
1542                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1543                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1544                         v4l_pix_format_touch(&p->fmt.pix);
1545                 return ret;
1546         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1547                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1548         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1549                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1550         case V4L2_BUF_TYPE_VBI_CAPTURE:
1551                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1552         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1553                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1554         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1555                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1556                         break;
1557                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1558                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1559                 /* just in case the driver zeroed it again */
1560                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1561                 return ret;
1562         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1563                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1564         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1565                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1566         case V4L2_BUF_TYPE_VBI_OUTPUT:
1567                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1568         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1569                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1570         case V4L2_BUF_TYPE_SDR_CAPTURE:
1571                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1572         case V4L2_BUF_TYPE_SDR_OUTPUT:
1573                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1574         case V4L2_BUF_TYPE_META_CAPTURE:
1575                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1576         case V4L2_BUF_TYPE_META_OUTPUT:
1577                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1578         }
1579         return -EINVAL;
1580 }
1581
1582 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1583                                 struct file *file, void *fh, void *arg)
1584 {
1585         struct v4l2_format *p = arg;
1586         struct video_device *vfd = video_devdata(file);
1587         int ret = check_fmt(file, p->type);
1588         unsigned int i;
1589
1590         if (ret)
1591                 return ret;
1592
1593         ret = v4l_enable_media_source(vfd);
1594         if (ret)
1595                 return ret;
1596         v4l_sanitize_format(p);
1597
1598         switch (p->type) {
1599         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1600                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1601                         break;
1602                 CLEAR_AFTER_FIELD(p, fmt.pix);
1603                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1604                 /* just in case the driver zeroed it again */
1605                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1606                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1607                         v4l_pix_format_touch(&p->fmt.pix);
1608                 return ret;
1609         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1610                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1611                         break;
1612                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1613                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1614                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1615                                           bytesperline);
1616                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1617         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1618                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1619                         break;
1620                 CLEAR_AFTER_FIELD(p, fmt.win);
1621                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1622         case V4L2_BUF_TYPE_VBI_CAPTURE:
1623                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1624                         break;
1625                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1626                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1627         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1628                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1629                         break;
1630                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1631                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1632         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1633                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1634                         break;
1635                 CLEAR_AFTER_FIELD(p, fmt.pix);
1636                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1637                 /* just in case the driver zeroed it again */
1638                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1639                 return ret;
1640         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1641                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1642                         break;
1643                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1644                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1645                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1646                                           bytesperline);
1647                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1648         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1649                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1650                         break;
1651                 CLEAR_AFTER_FIELD(p, fmt.win);
1652                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1653         case V4L2_BUF_TYPE_VBI_OUTPUT:
1654                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1655                         break;
1656                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1657                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1658         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1659                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1660                         break;
1661                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1662                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1663         case V4L2_BUF_TYPE_SDR_CAPTURE:
1664                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1665                         break;
1666                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1667                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1668         case V4L2_BUF_TYPE_SDR_OUTPUT:
1669                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1670                         break;
1671                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1672                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1673         case V4L2_BUF_TYPE_META_CAPTURE:
1674                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.meta);
1677                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1678         case V4L2_BUF_TYPE_META_OUTPUT:
1679                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1680                         break;
1681                 CLEAR_AFTER_FIELD(p, fmt.meta);
1682                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1683         }
1684         return -EINVAL;
1685 }
1686
1687 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1688                                 struct file *file, void *fh, void *arg)
1689 {
1690         struct v4l2_format *p = arg;
1691         struct video_device *vfd = video_devdata(file);
1692         int ret = check_fmt(file, p->type);
1693         unsigned int i;
1694
1695         if (ret)
1696                 return ret;
1697
1698         v4l_sanitize_format(p);
1699
1700         switch (p->type) {
1701         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1702                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1703                         break;
1704                 CLEAR_AFTER_FIELD(p, fmt.pix);
1705                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1706                 /* just in case the driver zeroed it again */
1707                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1708                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1709                         v4l_pix_format_touch(&p->fmt.pix);
1710                 return ret;
1711         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1712                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1713                         break;
1714                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1715                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1716                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1717                                           bytesperline);
1718                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1719         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1720                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1721                         break;
1722                 CLEAR_AFTER_FIELD(p, fmt.win);
1723                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1724         case V4L2_BUF_TYPE_VBI_CAPTURE:
1725                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1726                         break;
1727                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1728                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1729         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1730                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1731                         break;
1732                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1733                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1734         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1735                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1736                         break;
1737                 CLEAR_AFTER_FIELD(p, fmt.pix);
1738                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1739                 /* just in case the driver zeroed it again */
1740                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1741                 return ret;
1742         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1743                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1744                         break;
1745                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1746                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1747                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1748                                           bytesperline);
1749                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1750         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1751                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1752                         break;
1753                 CLEAR_AFTER_FIELD(p, fmt.win);
1754                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1755         case V4L2_BUF_TYPE_VBI_OUTPUT:
1756                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1757                         break;
1758                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1759                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1760         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1761                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1762                         break;
1763                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1764                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1765         case V4L2_BUF_TYPE_SDR_CAPTURE:
1766                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1767                         break;
1768                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1769                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1770         case V4L2_BUF_TYPE_SDR_OUTPUT:
1771                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1772                         break;
1773                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1774                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1775         case V4L2_BUF_TYPE_META_CAPTURE:
1776                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1777                         break;
1778                 CLEAR_AFTER_FIELD(p, fmt.meta);
1779                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1780         case V4L2_BUF_TYPE_META_OUTPUT:
1781                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1782                         break;
1783                 CLEAR_AFTER_FIELD(p, fmt.meta);
1784                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1785         }
1786         return -EINVAL;
1787 }
1788
1789 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1790                                 struct file *file, void *fh, void *arg)
1791 {
1792         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1793 }
1794
1795 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1796                                 struct file *file, void *fh, void *arg)
1797 {
1798         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1799 }
1800
1801 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1802                                 struct file *file, void *fh, void *arg)
1803 {
1804         struct video_device *vfd = video_devdata(file);
1805         struct v4l2_tuner *p = arg;
1806         int err;
1807
1808         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1809                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1810         err = ops->vidioc_g_tuner(file, fh, p);
1811         if (!err)
1812                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1813         return err;
1814 }
1815
1816 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1817                                 struct file *file, void *fh, void *arg)
1818 {
1819         struct video_device *vfd = video_devdata(file);
1820         struct v4l2_tuner *p = arg;
1821         int ret;
1822
1823         ret = v4l_enable_media_source(vfd);
1824         if (ret)
1825                 return ret;
1826         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1827                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1828         return ops->vidioc_s_tuner(file, fh, p);
1829 }
1830
1831 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1832                                 struct file *file, void *fh, void *arg)
1833 {
1834         struct video_device *vfd = video_devdata(file);
1835         struct v4l2_modulator *p = arg;
1836         int err;
1837
1838         if (vfd->vfl_type == VFL_TYPE_RADIO)
1839                 p->type = V4L2_TUNER_RADIO;
1840
1841         err = ops->vidioc_g_modulator(file, fh, p);
1842         if (!err)
1843                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1844         return err;
1845 }
1846
1847 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1848                                 struct file *file, void *fh, void *arg)
1849 {
1850         struct video_device *vfd = video_devdata(file);
1851         struct v4l2_modulator *p = arg;
1852
1853         if (vfd->vfl_type == VFL_TYPE_RADIO)
1854                 p->type = V4L2_TUNER_RADIO;
1855
1856         return ops->vidioc_s_modulator(file, fh, p);
1857 }
1858
1859 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1860                                 struct file *file, void *fh, void *arg)
1861 {
1862         struct video_device *vfd = video_devdata(file);
1863         struct v4l2_frequency *p = arg;
1864
1865         if (vfd->vfl_type == VFL_TYPE_SDR)
1866                 p->type = V4L2_TUNER_SDR;
1867         else
1868                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1869                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1870         return ops->vidioc_g_frequency(file, fh, p);
1871 }
1872
1873 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1874                                 struct file *file, void *fh, void *arg)
1875 {
1876         struct video_device *vfd = video_devdata(file);
1877         const struct v4l2_frequency *p = arg;
1878         enum v4l2_tuner_type type;
1879         int ret;
1880
1881         ret = v4l_enable_media_source(vfd);
1882         if (ret)
1883                 return ret;
1884         if (vfd->vfl_type == VFL_TYPE_SDR) {
1885                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1886                         return -EINVAL;
1887         } else {
1888                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1889                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1890                 if (type != p->type)
1891                         return -EINVAL;
1892         }
1893         return ops->vidioc_s_frequency(file, fh, p);
1894 }
1895
1896 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1897                                 struct file *file, void *fh, void *arg)
1898 {
1899         struct video_device *vfd = video_devdata(file);
1900         struct v4l2_standard *p = arg;
1901
1902         return v4l_video_std_enumstd(p, vfd->tvnorms);
1903 }
1904
1905 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1906                                 struct file *file, void *fh, void *arg)
1907 {
1908         struct video_device *vfd = video_devdata(file);
1909         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1910         int ret;
1911
1912         ret = v4l_enable_media_source(vfd);
1913         if (ret)
1914                 return ret;
1915         norm = id & vfd->tvnorms;
1916         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1917                 return -EINVAL;
1918
1919         /* Calls the specific handler */
1920         return ops->vidioc_s_std(file, fh, norm);
1921 }
1922
1923 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1924                                 struct file *file, void *fh, void *arg)
1925 {
1926         struct video_device *vfd = video_devdata(file);
1927         v4l2_std_id *p = arg;
1928         int ret;
1929
1930         ret = v4l_enable_media_source(vfd);
1931         if (ret)
1932                 return ret;
1933         /*
1934          * If no signal is detected, then the driver should return
1935          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1936          * any standards that do not apply removed.
1937          *
1938          * This means that tuners, audio and video decoders can join
1939          * their efforts to improve the standards detection.
1940          */
1941         *p = vfd->tvnorms;
1942         return ops->vidioc_querystd(file, fh, arg);
1943 }
1944
1945 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1946                                 struct file *file, void *fh, void *arg)
1947 {
1948         struct video_device *vfd = video_devdata(file);
1949         struct v4l2_hw_freq_seek *p = arg;
1950         enum v4l2_tuner_type type;
1951         int ret;
1952
1953         ret = v4l_enable_media_source(vfd);
1954         if (ret)
1955                 return ret;
1956         /* s_hw_freq_seek is not supported for SDR for now */
1957         if (vfd->vfl_type == VFL_TYPE_SDR)
1958                 return -EINVAL;
1959
1960         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1961                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1962         if (p->type != type)
1963                 return -EINVAL;
1964         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1965 }
1966
1967 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1968                                 struct file *file, void *fh, void *arg)
1969 {
1970         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1971 }
1972
1973 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1974                                 struct file *file, void *fh, void *arg)
1975 {
1976         struct v4l2_requestbuffers *p = arg;
1977         int ret = check_fmt(file, p->type);
1978
1979         if (ret)
1980                 return ret;
1981
1982         CLEAR_AFTER_FIELD(p, capabilities);
1983
1984         return ops->vidioc_reqbufs(file, fh, p);
1985 }
1986
1987 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1988                                 struct file *file, void *fh, void *arg)
1989 {
1990         struct v4l2_buffer *p = arg;
1991         int ret = check_fmt(file, p->type);
1992
1993         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1994 }
1995
1996 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1997                                 struct file *file, void *fh, void *arg)
1998 {
1999         struct v4l2_buffer *p = arg;
2000         int ret = check_fmt(file, p->type);
2001
2002         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2003 }
2004
2005 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008         struct v4l2_buffer *p = arg;
2009         int ret = check_fmt(file, p->type);
2010
2011         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2012 }
2013
2014 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2015                                 struct file *file, void *fh, void *arg)
2016 {
2017         struct v4l2_create_buffers *create = arg;
2018         int ret = check_fmt(file, create->format.type);
2019
2020         if (ret)
2021                 return ret;
2022
2023         CLEAR_AFTER_FIELD(create, capabilities);
2024
2025         v4l_sanitize_format(&create->format);
2026
2027         ret = ops->vidioc_create_bufs(file, fh, create);
2028
2029         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2030             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2031                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2032
2033         return ret;
2034 }
2035
2036 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2037                                 struct file *file, void *fh, void *arg)
2038 {
2039         struct v4l2_buffer *b = arg;
2040         int ret = check_fmt(file, b->type);
2041
2042         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2043 }
2044
2045 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2046                                 struct file *file, void *fh, void *arg)
2047 {
2048         struct v4l2_streamparm *p = arg;
2049         v4l2_std_id std;
2050         int ret = check_fmt(file, p->type);
2051
2052         if (ret)
2053                 return ret;
2054         if (ops->vidioc_g_parm)
2055                 return ops->vidioc_g_parm(file, fh, p);
2056         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2057             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2058                 return -EINVAL;
2059         p->parm.capture.readbuffers = 2;
2060         ret = ops->vidioc_g_std(file, fh, &std);
2061         if (ret == 0)
2062                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2063         return ret;
2064 }
2065
2066 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2067                                 struct file *file, void *fh, void *arg)
2068 {
2069         struct v4l2_streamparm *p = arg;
2070         int ret = check_fmt(file, p->type);
2071
2072         if (ret)
2073                 return ret;
2074
2075         /* Note: extendedmode is never used in drivers */
2076         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2077                 memset(p->parm.output.reserved, 0,
2078                        sizeof(p->parm.output.reserved));
2079                 p->parm.output.extendedmode = 0;
2080                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2081         } else {
2082                 memset(p->parm.capture.reserved, 0,
2083                        sizeof(p->parm.capture.reserved));
2084                 p->parm.capture.extendedmode = 0;
2085                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2086         }
2087         return ops->vidioc_s_parm(file, fh, p);
2088 }
2089
2090 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2091                                 struct file *file, void *fh, void *arg)
2092 {
2093         struct video_device *vfd = video_devdata(file);
2094         struct v4l2_queryctrl *p = arg;
2095         struct v4l2_fh *vfh =
2096                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2097
2098         if (vfh && vfh->ctrl_handler)
2099                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2100         if (vfd->ctrl_handler)
2101                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2102         if (ops->vidioc_queryctrl)
2103                 return ops->vidioc_queryctrl(file, fh, p);
2104         return -ENOTTY;
2105 }
2106
2107 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2108                                 struct file *file, void *fh, void *arg)
2109 {
2110         struct video_device *vfd = video_devdata(file);
2111         struct v4l2_query_ext_ctrl *p = arg;
2112         struct v4l2_fh *vfh =
2113                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2114
2115         if (vfh && vfh->ctrl_handler)
2116                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2117         if (vfd->ctrl_handler)
2118                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2119         if (ops->vidioc_query_ext_ctrl)
2120                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2121         return -ENOTTY;
2122 }
2123
2124 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2125                                 struct file *file, void *fh, void *arg)
2126 {
2127         struct video_device *vfd = video_devdata(file);
2128         struct v4l2_querymenu *p = arg;
2129         struct v4l2_fh *vfh =
2130                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2131
2132         if (vfh && vfh->ctrl_handler)
2133                 return v4l2_querymenu(vfh->ctrl_handler, p);
2134         if (vfd->ctrl_handler)
2135                 return v4l2_querymenu(vfd->ctrl_handler, p);
2136         if (ops->vidioc_querymenu)
2137                 return ops->vidioc_querymenu(file, fh, p);
2138         return -ENOTTY;
2139 }
2140
2141 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2142                                 struct file *file, void *fh, void *arg)
2143 {
2144         struct video_device *vfd = video_devdata(file);
2145         struct v4l2_control *p = arg;
2146         struct v4l2_fh *vfh =
2147                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2148         struct v4l2_ext_controls ctrls;
2149         struct v4l2_ext_control ctrl;
2150
2151         if (vfh && vfh->ctrl_handler)
2152                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2153         if (vfd->ctrl_handler)
2154                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2155         if (ops->vidioc_g_ctrl)
2156                 return ops->vidioc_g_ctrl(file, fh, p);
2157         if (ops->vidioc_g_ext_ctrls == NULL)
2158                 return -ENOTTY;
2159
2160         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2161         ctrls.count = 1;
2162         ctrls.controls = &ctrl;
2163         ctrl.id = p->id;
2164         ctrl.value = p->value;
2165         if (check_ext_ctrls(&ctrls, 1)) {
2166                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2167
2168                 if (ret == 0)
2169                         p->value = ctrl.value;
2170                 return ret;
2171         }
2172         return -EINVAL;
2173 }
2174
2175 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2176                                 struct file *file, void *fh, void *arg)
2177 {
2178         struct video_device *vfd = video_devdata(file);
2179         struct v4l2_control *p = arg;
2180         struct v4l2_fh *vfh =
2181                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2182         struct v4l2_ext_controls ctrls;
2183         struct v4l2_ext_control ctrl;
2184
2185         if (vfh && vfh->ctrl_handler)
2186                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2187         if (vfd->ctrl_handler)
2188                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2189         if (ops->vidioc_s_ctrl)
2190                 return ops->vidioc_s_ctrl(file, fh, p);
2191         if (ops->vidioc_s_ext_ctrls == NULL)
2192                 return -ENOTTY;
2193
2194         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2195         ctrls.count = 1;
2196         ctrls.controls = &ctrl;
2197         ctrl.id = p->id;
2198         ctrl.value = p->value;
2199         if (check_ext_ctrls(&ctrls, 1))
2200                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2201         return -EINVAL;
2202 }
2203
2204 static int v4l_g_ext_ctrls(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_ext_controls *p = arg;
2209         struct v4l2_fh *vfh =
2210                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2211
2212         p->error_idx = p->count;
2213         if (vfh && vfh->ctrl_handler)
2214                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2215                                         vfd, vfd->v4l2_dev->mdev, p);
2216         if (vfd->ctrl_handler)
2217                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2218                                         vfd, vfd->v4l2_dev->mdev, p);
2219         if (ops->vidioc_g_ext_ctrls == NULL)
2220                 return -ENOTTY;
2221         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2222                                         -EINVAL;
2223 }
2224
2225 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2226                                 struct file *file, void *fh, void *arg)
2227 {
2228         struct video_device *vfd = video_devdata(file);
2229         struct v4l2_ext_controls *p = arg;
2230         struct v4l2_fh *vfh =
2231                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2232
2233         p->error_idx = p->count;
2234         if (vfh && vfh->ctrl_handler)
2235                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2236                                         vfd, vfd->v4l2_dev->mdev, p);
2237         if (vfd->ctrl_handler)
2238                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2239                                         vfd, vfd->v4l2_dev->mdev, p);
2240         if (ops->vidioc_s_ext_ctrls == NULL)
2241                 return -ENOTTY;
2242         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2243                                         -EINVAL;
2244 }
2245
2246 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2247                                 struct file *file, void *fh, void *arg)
2248 {
2249         struct video_device *vfd = video_devdata(file);
2250         struct v4l2_ext_controls *p = arg;
2251         struct v4l2_fh *vfh =
2252                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2253
2254         p->error_idx = p->count;
2255         if (vfh && vfh->ctrl_handler)
2256                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2257                                           vfd, vfd->v4l2_dev->mdev, p);
2258         if (vfd->ctrl_handler)
2259                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2260                                           vfd, vfd->v4l2_dev->mdev, p);
2261         if (ops->vidioc_try_ext_ctrls == NULL)
2262                 return -ENOTTY;
2263         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2264                                         -EINVAL;
2265 }
2266
2267 /*
2268  * The selection API specified originally that the _MPLANE buffer types
2269  * shouldn't be used. The reasons for this are lost in the mists of time
2270  * (or just really crappy memories). Regardless, this is really annoying
2271  * for userspace. So to keep things simple we map _MPLANE buffer types
2272  * to their 'regular' counterparts before calling the driver. And we
2273  * restore it afterwards. This way applications can use either buffer
2274  * type and drivers don't need to check for both.
2275  */
2276 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2277                            struct file *file, void *fh, void *arg)
2278 {
2279         struct v4l2_selection *p = arg;
2280         u32 old_type = p->type;
2281         int ret;
2282
2283         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2284                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2285         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2286                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2287         ret = ops->vidioc_g_selection(file, fh, p);
2288         p->type = old_type;
2289         return ret;
2290 }
2291
2292 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2293                            struct file *file, void *fh, void *arg)
2294 {
2295         struct v4l2_selection *p = arg;
2296         u32 old_type = p->type;
2297         int ret;
2298
2299         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2300                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2301         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2302                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2303         ret = ops->vidioc_s_selection(file, fh, p);
2304         p->type = old_type;
2305         return ret;
2306 }
2307
2308 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2309                                 struct file *file, void *fh, void *arg)
2310 {
2311         struct video_device *vfd = video_devdata(file);
2312         struct v4l2_crop *p = arg;
2313         struct v4l2_selection s = {
2314                 .type = p->type,
2315         };
2316         int ret;
2317
2318         /* simulate capture crop using selection api */
2319
2320         /* crop means compose for output devices */
2321         if (V4L2_TYPE_IS_OUTPUT(p->type))
2322                 s.target = V4L2_SEL_TGT_COMPOSE;
2323         else
2324                 s.target = V4L2_SEL_TGT_CROP;
2325
2326         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2327                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2328                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2329
2330         ret = v4l_g_selection(ops, file, fh, &s);
2331
2332         /* copying results to old structure on success */
2333         if (!ret)
2334                 p->c = s.r;
2335         return ret;
2336 }
2337
2338 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2339                                 struct file *file, void *fh, void *arg)
2340 {
2341         struct video_device *vfd = video_devdata(file);
2342         struct v4l2_crop *p = arg;
2343         struct v4l2_selection s = {
2344                 .type = p->type,
2345                 .r = p->c,
2346         };
2347
2348         /* simulate capture crop using selection api */
2349
2350         /* crop means compose for output devices */
2351         if (V4L2_TYPE_IS_OUTPUT(p->type))
2352                 s.target = V4L2_SEL_TGT_COMPOSE;
2353         else
2354                 s.target = V4L2_SEL_TGT_CROP;
2355
2356         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2357                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2358                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2359
2360         return v4l_s_selection(ops, file, fh, &s);
2361 }
2362
2363 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2364                                 struct file *file, void *fh, void *arg)
2365 {
2366         struct video_device *vfd = video_devdata(file);
2367         struct v4l2_cropcap *p = arg;
2368         struct v4l2_selection s = { .type = p->type };
2369         int ret = 0;
2370
2371         /* setting trivial pixelaspect */
2372         p->pixelaspect.numerator = 1;
2373         p->pixelaspect.denominator = 1;
2374
2375         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2376                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2377         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2378                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2379
2380         /*
2381          * The determine_valid_ioctls() call already should ensure
2382          * that this can never happen, but just in case...
2383          */
2384         if (WARN_ON(!ops->vidioc_g_selection))
2385                 return -ENOTTY;
2386
2387         if (ops->vidioc_g_pixelaspect)
2388                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2389                                                 &p->pixelaspect);
2390
2391         /*
2392          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2393          * square pixel aspect ratio in that case.
2394          */
2395         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2396                 return ret;
2397
2398         /* Use g_selection() to fill in the bounds and defrect rectangles */
2399
2400         /* obtaining bounds */
2401         if (V4L2_TYPE_IS_OUTPUT(p->type))
2402                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2403         else
2404                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2405
2406         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2407                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2408                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2409
2410         ret = v4l_g_selection(ops, file, fh, &s);
2411         if (ret)
2412                 return ret;
2413         p->bounds = s.r;
2414
2415         /* obtaining defrect */
2416         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2417                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2418         else
2419                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2420
2421         ret = v4l_g_selection(ops, file, fh, &s);
2422         if (ret)
2423                 return ret;
2424         p->defrect = s.r;
2425
2426         return 0;
2427 }
2428
2429 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2430                                 struct file *file, void *fh, void *arg)
2431 {
2432         struct video_device *vfd = video_devdata(file);
2433         int ret;
2434
2435         if (vfd->v4l2_dev)
2436                 pr_info("%s: =================  START STATUS  =================\n",
2437                         vfd->v4l2_dev->name);
2438         ret = ops->vidioc_log_status(file, fh);
2439         if (vfd->v4l2_dev)
2440                 pr_info("%s: ==================  END STATUS  ==================\n",
2441                         vfd->v4l2_dev->name);
2442         return ret;
2443 }
2444
2445 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2446                                 struct file *file, void *fh, void *arg)
2447 {
2448 #ifdef CONFIG_VIDEO_ADV_DEBUG
2449         struct v4l2_dbg_register *p = arg;
2450         struct video_device *vfd = video_devdata(file);
2451         struct v4l2_subdev *sd;
2452         int idx = 0;
2453
2454         if (!capable(CAP_SYS_ADMIN))
2455                 return -EPERM;
2456         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2457                 if (vfd->v4l2_dev == NULL)
2458                         return -EINVAL;
2459                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2460                         if (p->match.addr == idx++)
2461                                 return v4l2_subdev_call(sd, core, g_register, p);
2462                 return -EINVAL;
2463         }
2464         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2465             (ops->vidioc_g_chip_info || p->match.addr == 0))
2466                 return ops->vidioc_g_register(file, fh, p);
2467         return -EINVAL;
2468 #else
2469         return -ENOTTY;
2470 #endif
2471 }
2472
2473 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2474                                 struct file *file, void *fh, void *arg)
2475 {
2476 #ifdef CONFIG_VIDEO_ADV_DEBUG
2477         const struct v4l2_dbg_register *p = arg;
2478         struct video_device *vfd = video_devdata(file);
2479         struct v4l2_subdev *sd;
2480         int idx = 0;
2481
2482         if (!capable(CAP_SYS_ADMIN))
2483                 return -EPERM;
2484         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2485                 if (vfd->v4l2_dev == NULL)
2486                         return -EINVAL;
2487                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2488                         if (p->match.addr == idx++)
2489                                 return v4l2_subdev_call(sd, core, s_register, p);
2490                 return -EINVAL;
2491         }
2492         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2493             (ops->vidioc_g_chip_info || p->match.addr == 0))
2494                 return ops->vidioc_s_register(file, fh, p);
2495         return -EINVAL;
2496 #else
2497         return -ENOTTY;
2498 #endif
2499 }
2500
2501 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2502                                 struct file *file, void *fh, void *arg)
2503 {
2504 #ifdef CONFIG_VIDEO_ADV_DEBUG
2505         struct video_device *vfd = video_devdata(file);
2506         struct v4l2_dbg_chip_info *p = arg;
2507         struct v4l2_subdev *sd;
2508         int idx = 0;
2509
2510         switch (p->match.type) {
2511         case V4L2_CHIP_MATCH_BRIDGE:
2512                 if (ops->vidioc_s_register)
2513                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2514                 if (ops->vidioc_g_register)
2515                         p->flags |= V4L2_CHIP_FL_READABLE;
2516                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2517                 if (ops->vidioc_g_chip_info)
2518                         return ops->vidioc_g_chip_info(file, fh, arg);
2519                 if (p->match.addr)
2520                         return -EINVAL;
2521                 return 0;
2522
2523         case V4L2_CHIP_MATCH_SUBDEV:
2524                 if (vfd->v4l2_dev == NULL)
2525                         break;
2526                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2527                         if (p->match.addr != idx++)
2528                                 continue;
2529                         if (sd->ops->core && sd->ops->core->s_register)
2530                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2531                         if (sd->ops->core && sd->ops->core->g_register)
2532                                 p->flags |= V4L2_CHIP_FL_READABLE;
2533                         strscpy(p->name, sd->name, sizeof(p->name));
2534                         return 0;
2535                 }
2536                 break;
2537         }
2538         return -EINVAL;
2539 #else
2540         return -ENOTTY;
2541 #endif
2542 }
2543
2544 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2545                                 struct file *file, void *fh, void *arg)
2546 {
2547         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2548 }
2549
2550 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2551                                 struct file *file, void *fh, void *arg)
2552 {
2553         return ops->vidioc_subscribe_event(fh, arg);
2554 }
2555
2556 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2557                                 struct file *file, void *fh, void *arg)
2558 {
2559         return ops->vidioc_unsubscribe_event(fh, arg);
2560 }
2561
2562 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2563                                 struct file *file, void *fh, void *arg)
2564 {
2565         struct v4l2_sliced_vbi_cap *p = arg;
2566         int ret = check_fmt(file, p->type);
2567
2568         if (ret)
2569                 return ret;
2570
2571         /* Clear up to type, everything after type is zeroed already */
2572         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2573
2574         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2575 }
2576
2577 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2578                                 struct file *file, void *fh, void *arg)
2579 {
2580         struct video_device *vfd = video_devdata(file);
2581         struct v4l2_frequency_band *p = arg;
2582         enum v4l2_tuner_type type;
2583         int err;
2584
2585         if (vfd->vfl_type == VFL_TYPE_SDR) {
2586                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2587                         return -EINVAL;
2588                 type = p->type;
2589         } else {
2590                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2591                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2592                 if (type != p->type)
2593                         return -EINVAL;
2594         }
2595         if (ops->vidioc_enum_freq_bands) {
2596                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2597                 if (err != -ENOTTY)
2598                         return err;
2599         }
2600         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2601                 struct v4l2_tuner t = {
2602                         .index = p->tuner,
2603                         .type = type,
2604                 };
2605
2606                 if (p->index)
2607                         return -EINVAL;
2608                 err = ops->vidioc_g_tuner(file, fh, &t);
2609                 if (err)
2610                         return err;
2611                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2612                 p->rangelow = t.rangelow;
2613                 p->rangehigh = t.rangehigh;
2614                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2615                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2616                 return 0;
2617         }
2618         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2619                 struct v4l2_modulator m = {
2620                         .index = p->tuner,
2621                 };
2622
2623                 if (type != V4L2_TUNER_RADIO)
2624                         return -EINVAL;
2625                 if (p->index)
2626                         return -EINVAL;
2627                 err = ops->vidioc_g_modulator(file, fh, &m);
2628                 if (err)
2629                         return err;
2630                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2631                 p->rangelow = m.rangelow;
2632                 p->rangehigh = m.rangehigh;
2633                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2634                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2635                 return 0;
2636         }
2637         return -ENOTTY;
2638 }
2639
2640 struct v4l2_ioctl_info {
2641         unsigned int ioctl;
2642         u32 flags;
2643         const char * const name;
2644         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2645                     void *fh, void *p);
2646         void (*debug)(const void *arg, bool write_only);
2647 };
2648
2649 /* This control needs a priority check */
2650 #define INFO_FL_PRIO            (1 << 0)
2651 /* This control can be valid if the filehandle passes a control handler. */
2652 #define INFO_FL_CTRL            (1 << 1)
2653 /* Queuing ioctl */
2654 #define INFO_FL_QUEUE           (1 << 2)
2655 /* Always copy back result, even on error */
2656 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2657 /* Zero struct from after the field to the end */
2658 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2659         ((offsetof(struct v4l2_struct, field) +                 \
2660           sizeof_field(struct v4l2_struct, field)) << 16)
2661 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2662
2663 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2664         static int v4l_stub_ ## _vidioc(                        \
2665                         const struct v4l2_ioctl_ops *ops,       \
2666                         struct file *file, void *fh, void *p)   \
2667         {                                                       \
2668                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2669         }
2670
2671 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2672         [_IOC_NR(_ioctl)] = {                                   \
2673                 .ioctl = _ioctl,                                \
2674                 .flags = _flags,                                \
2675                 .name = #_ioctl,                                \
2676                 .func = _func,                                  \
2677                 .debug = _debug,                                \
2678         }
2679
2680 DEFINE_V4L_STUB_FUNC(g_fbuf)
2681 DEFINE_V4L_STUB_FUNC(s_fbuf)
2682 DEFINE_V4L_STUB_FUNC(expbuf)
2683 DEFINE_V4L_STUB_FUNC(g_std)
2684 DEFINE_V4L_STUB_FUNC(g_audio)
2685 DEFINE_V4L_STUB_FUNC(s_audio)
2686 DEFINE_V4L_STUB_FUNC(g_input)
2687 DEFINE_V4L_STUB_FUNC(g_edid)
2688 DEFINE_V4L_STUB_FUNC(s_edid)
2689 DEFINE_V4L_STUB_FUNC(g_output)
2690 DEFINE_V4L_STUB_FUNC(g_audout)
2691 DEFINE_V4L_STUB_FUNC(s_audout)
2692 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2693 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2694 DEFINE_V4L_STUB_FUNC(enumaudio)
2695 DEFINE_V4L_STUB_FUNC(enumaudout)
2696 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2697 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2698 DEFINE_V4L_STUB_FUNC(g_enc_index)
2699 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2700 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2701 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2702 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2703 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2704 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2705 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2706 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2707 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2708
2709 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2710         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2711         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2712         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2713         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2714         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2715         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2716         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2717         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2718         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2719         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2720         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2721         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2722         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2723         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2724         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2725         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2726         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2727         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2728         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2729         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2730         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2731         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2732         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2733         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2734         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2735         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2736         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2737         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2738         IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2739         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2740         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2741         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2742         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2743         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2744         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2745         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2746         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2747         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2748         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2749         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2750         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2751         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2752         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2753         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2754         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2755         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2756         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2757         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2758         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2759         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2760         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2761         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2762         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2763         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2764         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)),
2765         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2766         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2767         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2768         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2769         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2770         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2771         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2772         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2773         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2774         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2775         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2776         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2777         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2778         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2779         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)),
2780         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2781         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2782         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2783         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2784         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2785         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2786         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2787         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2788         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2789         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2790         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)),
2791         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)),
2792 };
2793 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2794
2795 static bool v4l2_is_known_ioctl(unsigned int cmd)
2796 {
2797         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2798                 return false;
2799         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2800 }
2801
2802 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2803                                          struct v4l2_fh *vfh, unsigned int cmd,
2804                                          void *arg)
2805 {
2806         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2807                 return vdev->lock;
2808 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2809         if (vfh && vfh->m2m_ctx &&
2810             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2811                 if (vfh->m2m_ctx->q_lock)
2812                         return vfh->m2m_ctx->q_lock;
2813         }
2814 #endif
2815         if (vdev->queue && vdev->queue->lock &&
2816                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2817                 return vdev->queue->lock;
2818         return vdev->lock;
2819 }
2820
2821 /* Common ioctl debug function. This function can be used by
2822    external ioctl messages as well as internal V4L ioctl */
2823 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2824 {
2825         const char *dir, *type;
2826
2827         if (prefix)
2828                 printk(KERN_DEBUG "%s: ", prefix);
2829
2830         switch (_IOC_TYPE(cmd)) {
2831         case 'd':
2832                 type = "v4l2_int";
2833                 break;
2834         case 'V':
2835                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2836                         type = "v4l2";
2837                         break;
2838                 }
2839                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2840                 return;
2841         default:
2842                 type = "unknown";
2843                 break;
2844         }
2845
2846         switch (_IOC_DIR(cmd)) {
2847         case _IOC_NONE:              dir = "--"; break;
2848         case _IOC_READ:              dir = "r-"; break;
2849         case _IOC_WRITE:             dir = "-w"; break;
2850         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2851         default:                     dir = "*ERR*"; break;
2852         }
2853         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2854                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2855 }
2856 EXPORT_SYMBOL(v4l_printk_ioctl);
2857
2858 static long __video_do_ioctl(struct file *file,
2859                 unsigned int cmd, void *arg)
2860 {
2861         struct video_device *vfd = video_devdata(file);
2862         struct mutex *req_queue_lock = NULL;
2863         struct mutex *lock; /* ioctl serialization mutex */
2864         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2865         bool write_only = false;
2866         struct v4l2_ioctl_info default_info;
2867         const struct v4l2_ioctl_info *info;
2868         void *fh = file->private_data;
2869         struct v4l2_fh *vfh = NULL;
2870         int dev_debug = vfd->dev_debug;
2871         long ret = -ENOTTY;
2872
2873         if (ops == NULL) {
2874                 pr_warn("%s: has no ioctl_ops.\n",
2875                                 video_device_node_name(vfd));
2876                 return ret;
2877         }
2878
2879         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2880                 vfh = file->private_data;
2881
2882         /*
2883          * We need to serialize streamon/off with queueing new requests.
2884          * These ioctls may trigger the cancellation of a streaming
2885          * operation, and that should not be mixed with queueing a new
2886          * request at the same time.
2887          */
2888         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2889             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2890                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2891
2892                 if (mutex_lock_interruptible(req_queue_lock))
2893                         return -ERESTARTSYS;
2894         }
2895
2896         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2897
2898         if (lock && mutex_lock_interruptible(lock)) {
2899                 if (req_queue_lock)
2900                         mutex_unlock(req_queue_lock);
2901                 return -ERESTARTSYS;
2902         }
2903
2904         if (!video_is_registered(vfd)) {
2905                 ret = -ENODEV;
2906                 goto unlock;
2907         }
2908
2909         if (v4l2_is_known_ioctl(cmd)) {
2910                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2911
2912                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2913                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2914                         goto done;
2915
2916                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2917                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2918                         if (ret)
2919                                 goto done;
2920                 }
2921         } else {
2922                 default_info.ioctl = cmd;
2923                 default_info.flags = 0;
2924                 default_info.debug = v4l_print_default;
2925                 info = &default_info;
2926         }
2927
2928         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2929         if (info != &default_info) {
2930                 ret = info->func(ops, file, fh, arg);
2931         } else if (!ops->vidioc_default) {
2932                 ret = -ENOTTY;
2933         } else {
2934                 ret = ops->vidioc_default(file, fh,
2935                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2936                         cmd, arg);
2937         }
2938
2939 done:
2940         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2941                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2942                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2943                         goto unlock;
2944
2945                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2946                 if (ret < 0)
2947                         pr_cont(": error %ld", ret);
2948                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2949                         pr_cont("\n");
2950                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2951                         info->debug(arg, write_only);
2952                 else {
2953                         pr_cont(": ");
2954                         info->debug(arg, write_only);
2955                 }
2956         }
2957
2958 unlock:
2959         if (lock)
2960                 mutex_unlock(lock);
2961         if (req_queue_lock)
2962                 mutex_unlock(req_queue_lock);
2963         return ret;
2964 }
2965
2966 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2967                             void __user **user_ptr, void ***kernel_ptr)
2968 {
2969         int ret = 0;
2970
2971         switch (cmd) {
2972         case VIDIOC_PREPARE_BUF:
2973         case VIDIOC_QUERYBUF:
2974         case VIDIOC_QBUF:
2975         case VIDIOC_DQBUF: {
2976                 struct v4l2_buffer *buf = parg;
2977
2978                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2979                         if (buf->length > VIDEO_MAX_PLANES) {
2980                                 ret = -EINVAL;
2981                                 break;
2982                         }
2983                         *user_ptr = (void __user *)buf->m.planes;
2984                         *kernel_ptr = (void **)&buf->m.planes;
2985                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2986                         ret = 1;
2987                 }
2988                 break;
2989         }
2990
2991         case VIDIOC_G_EDID:
2992         case VIDIOC_S_EDID: {
2993                 struct v4l2_edid *edid = parg;
2994
2995                 if (edid->blocks) {
2996                         if (edid->blocks > 256) {
2997                                 ret = -EINVAL;
2998                                 break;
2999                         }
3000                         *user_ptr = (void __user *)edid->edid;
3001                         *kernel_ptr = (void **)&edid->edid;
3002                         *array_size = edid->blocks * 128;
3003                         ret = 1;
3004                 }
3005                 break;
3006         }
3007
3008         case VIDIOC_S_EXT_CTRLS:
3009         case VIDIOC_G_EXT_CTRLS:
3010         case VIDIOC_TRY_EXT_CTRLS: {
3011                 struct v4l2_ext_controls *ctrls = parg;
3012
3013                 if (ctrls->count != 0) {
3014                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3015                                 ret = -EINVAL;
3016                                 break;
3017                         }
3018                         *user_ptr = (void __user *)ctrls->controls;
3019                         *kernel_ptr = (void **)&ctrls->controls;
3020                         *array_size = sizeof(struct v4l2_ext_control)
3021                                     * ctrls->count;
3022                         ret = 1;
3023                 }
3024                 break;
3025         }
3026         }
3027
3028         return ret;
3029 }
3030
3031 static unsigned int video_translate_cmd(unsigned int cmd)
3032 {
3033         switch (cmd) {
3034 #ifdef CONFIG_COMPAT_32BIT_TIME
3035         case VIDIOC_DQEVENT_TIME32:
3036                 return VIDIOC_DQEVENT;
3037         case VIDIOC_QUERYBUF_TIME32:
3038                 return VIDIOC_QUERYBUF;
3039         case VIDIOC_QBUF_TIME32:
3040                 return VIDIOC_QBUF;
3041         case VIDIOC_DQBUF_TIME32:
3042                 return VIDIOC_DQBUF;
3043         case VIDIOC_PREPARE_BUF_TIME32:
3044                 return VIDIOC_PREPARE_BUF;
3045 #endif
3046         }
3047
3048         return cmd;
3049 }
3050
3051 static int video_get_user(void __user *arg, void *parg, unsigned int cmd,
3052                           bool *always_copy)
3053 {
3054         unsigned int n = _IOC_SIZE(cmd);
3055
3056         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3057                 /* read-only ioctl */
3058                 memset(parg, 0, n);
3059                 return 0;
3060         }
3061
3062         switch (cmd) {
3063 #ifdef CONFIG_COMPAT_32BIT_TIME
3064         case VIDIOC_QUERYBUF_TIME32:
3065         case VIDIOC_QBUF_TIME32:
3066         case VIDIOC_DQBUF_TIME32:
3067         case VIDIOC_PREPARE_BUF_TIME32: {
3068                 struct v4l2_buffer_time32 vb32;
3069                 struct v4l2_buffer *vb = parg;
3070
3071                 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3072                         return -EFAULT;
3073
3074                 *vb = (struct v4l2_buffer) {
3075                         .index          = vb32.index,
3076                         .type           = vb32.type,
3077                         .bytesused      = vb32.bytesused,
3078                         .flags          = vb32.flags,
3079                         .field          = vb32.field,
3080                         .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3081                         .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3082                         .timecode       = vb32.timecode,
3083                         .sequence       = vb32.sequence,
3084                         .memory         = vb32.memory,
3085                         .m.userptr      = vb32.m.userptr,
3086                         .length         = vb32.length,
3087                         .request_fd     = vb32.request_fd,
3088                 };
3089
3090                 if (cmd == VIDIOC_QUERYBUF_TIME32)
3091                         vb->request_fd = 0;
3092
3093                 break;
3094         }
3095 #endif
3096         default:
3097                 /*
3098                  * In some cases, only a few fields are used as input,
3099                  * i.e. when the app sets "index" and then the driver
3100                  * fills in the rest of the structure for the thing
3101                  * with that index.  We only need to copy up the first
3102                  * non-input field.
3103                  */
3104                 if (v4l2_is_known_ioctl(cmd)) {
3105                         u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3106
3107                         if (flags & INFO_FL_CLEAR_MASK)
3108                                 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3109                         *always_copy = flags & INFO_FL_ALWAYS_COPY;
3110                 }
3111
3112                 if (copy_from_user(parg, (void __user *)arg, n))
3113                         return -EFAULT;
3114
3115                 /* zero out anything we don't copy from userspace */
3116                 if (n < _IOC_SIZE(cmd))
3117                         memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
3118                 break;
3119         }
3120
3121         return 0;
3122 }
3123
3124 static int video_put_user(void __user *arg, void *parg, unsigned int cmd)
3125 {
3126         if (!(_IOC_DIR(cmd) & _IOC_READ))
3127                 return 0;
3128
3129         switch (cmd) {
3130 #ifdef CONFIG_COMPAT_32BIT_TIME
3131         case VIDIOC_DQEVENT_TIME32: {
3132                 struct v4l2_event *ev = parg;
3133                 struct v4l2_event_time32 ev32 = {
3134                         .type           = ev->type,
3135                         .pending        = ev->pending,
3136                         .sequence       = ev->sequence,
3137                         .timestamp.tv_sec  = ev->timestamp.tv_sec,
3138                         .timestamp.tv_nsec = ev->timestamp.tv_nsec,
3139                         .id             = ev->id,
3140                 };
3141
3142                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3143                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3144
3145                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3146                         return -EFAULT;
3147                 break;
3148         }
3149         case VIDIOC_QUERYBUF_TIME32:
3150         case VIDIOC_QBUF_TIME32:
3151         case VIDIOC_DQBUF_TIME32:
3152         case VIDIOC_PREPARE_BUF_TIME32: {
3153                 struct v4l2_buffer *vb = parg;
3154                 struct v4l2_buffer_time32 vb32 = {
3155                         .index          = vb->index,
3156                         .type           = vb->type,
3157                         .bytesused      = vb->bytesused,
3158                         .flags          = vb->flags,
3159                         .field          = vb->field,
3160                         .timestamp.tv_sec       = vb->timestamp.tv_sec,
3161                         .timestamp.tv_usec      = vb->timestamp.tv_usec,
3162                         .timecode       = vb->timecode,
3163                         .sequence       = vb->sequence,
3164                         .memory         = vb->memory,
3165                         .m.userptr      = vb->m.userptr,
3166                         .length         = vb->length,
3167                         .request_fd     = vb->request_fd,
3168                 };
3169
3170                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3171                         return -EFAULT;
3172                 break;
3173         }
3174 #endif
3175         default:
3176                 /*  Copy results into user buffer  */
3177                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3178                         return -EFAULT;
3179                 break;
3180         }
3181
3182         return 0;
3183 }
3184
3185 long
3186 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3187                v4l2_kioctl func)
3188 {
3189         char    sbuf[128];
3190         void    *mbuf = NULL;
3191         void    *parg = (void *)arg;
3192         long    err  = -EINVAL;
3193         bool    has_array_args;
3194         bool    always_copy = false;
3195         size_t  array_size = 0;
3196         void __user *user_ptr = NULL;
3197         void    **kernel_ptr = NULL;
3198         unsigned int cmd = video_translate_cmd(orig_cmd);
3199         const size_t ioc_size = _IOC_SIZE(cmd);
3200
3201         /*  Copy arguments into temp kernel buffer  */
3202         if (_IOC_DIR(cmd) != _IOC_NONE) {
3203                 if (ioc_size <= sizeof(sbuf)) {
3204                         parg = sbuf;
3205                 } else {
3206                         /* too big to allocate from stack */
3207                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3208                         if (NULL == mbuf)
3209                                 return -ENOMEM;
3210                         parg = mbuf;
3211                 }
3212
3213                 err = video_get_user((void __user *)arg, parg, orig_cmd,
3214                                      &always_copy);
3215                 if (err)
3216                         goto out;
3217         }
3218
3219         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3220         if (err < 0)
3221                 goto out;
3222         has_array_args = err;
3223
3224         if (has_array_args) {
3225                 /*
3226                  * When adding new types of array args, make sure that the
3227                  * parent argument to ioctl (which contains the pointer to the
3228                  * array) fits into sbuf (so that mbuf will still remain
3229                  * unused up to here).
3230                  */
3231                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3232                 err = -ENOMEM;
3233                 if (NULL == mbuf)
3234                         goto out_array_args;
3235                 err = -EFAULT;
3236                 if (copy_from_user(mbuf, user_ptr, array_size))
3237                         goto out_array_args;
3238                 *kernel_ptr = mbuf;
3239         }
3240
3241         /* Handles IOCTL */
3242         err = func(file, cmd, parg);
3243         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3244                 err = -ENOTTY;
3245                 goto out;
3246         }
3247
3248         if (err == 0) {
3249                 if (cmd == VIDIOC_DQBUF)
3250                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3251                 else if (cmd == VIDIOC_QBUF)
3252                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3253         }
3254
3255         if (has_array_args) {
3256                 *kernel_ptr = (void __force *)user_ptr;
3257                 if (copy_to_user(user_ptr, mbuf, array_size))
3258                         err = -EFAULT;
3259                 goto out_array_args;
3260         }
3261         /*
3262          * Some ioctls can return an error, but still have valid
3263          * results that must be returned.
3264          */
3265         if (err < 0 && !always_copy)
3266                 goto out;
3267
3268 out_array_args:
3269         if (video_put_user((void __user *)arg, parg, orig_cmd))
3270                 err = -EFAULT;
3271 out:
3272         kvfree(mbuf);
3273         return err;
3274 }
3275
3276 long video_ioctl2(struct file *file,
3277                unsigned int cmd, unsigned long arg)
3278 {
3279         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3280 }
3281 EXPORT_SYMBOL(video_ioctl2);