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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Video capture interface for Linux version 2
   4  *
   5  * A generic framework to process V4L2 ioctl commands.
   6  *
   7  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
   8  *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9  */
  10
  11 #include <linux/mm.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/types.h>
  15 #include <linux/kernel.h>
  16 #include <linux/version.h>
  17
  18 #include <linux/videodev2.h>
  19
  20 #include <media/v4l2-common.h>
  21 #include <media/v4l2-ioctl.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-fh.h>
  24 #include <media/v4l2-event.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/videobuf2-v4l2.h>
  27 #include <media/v4l2-mc.h>
  28 #include <media/v4l2-mem2mem.h>
  29
  30 #include <trace/events/v4l2.h>
  31
  32 /* Zero out the end of the struct pointed to by p.  Everything after, but
  33  * not including, the specified field is cleared. */
  34 #define CLEAR_AFTER_FIELD(p, field) \
  35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  37
  38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  39
  40 struct std_descr {
  41         v4l2_std_id std;
  42         const char *descr;
  43 };
  44
  45 static const struct std_descr standards[] = {
  46         { V4L2_STD_NTSC,        "NTSC"      },
  47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  51         { V4L2_STD_PAL,         "PAL"       },
  52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  53         { V4L2_STD_PAL_B,       "PAL-B"     },
  54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  55         { V4L2_STD_PAL_G,       "PAL-G"     },
  56         { V4L2_STD_PAL_H,       "PAL-H"     },
  57         { V4L2_STD_PAL_I,       "PAL-I"     },
  58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  59         { V4L2_STD_PAL_D,       "PAL-D"     },
  60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  61         { V4L2_STD_PAL_K,       "PAL-K"     },
  62         { V4L2_STD_PAL_M,       "PAL-M"     },
  63         { V4L2_STD_PAL_N,       "PAL-N"     },
  64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  65         { V4L2_STD_PAL_60,      "PAL-60"    },
  66         { V4L2_STD_SECAM,       "SECAM"     },
  67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  76         { 0,                    "Unknown"   }
  77 };
  78
  79 /* video4linux standard ID conversion to standard name
  80  */
  81 const char *v4l2_norm_to_name(v4l2_std_id id)
  82 {
  83         u32 myid = id;
  84         int i;
  85
  86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  87            64 bit comparisons. So, on that architecture, with some gcc
  88            variants, compilation fails. Currently, the max value is 30bit wide.
  89          */
  90         BUG_ON(myid != id);
  91
  92         for (i = 0; standards[i].std; i++)
  93                 if (myid == standards[i].std)
  94                         break;
  95         return standards[i].descr;
  96 }
  97 EXPORT_SYMBOL(v4l2_norm_to_name);
  98
  99 /* Returns frame period for the given standard */
 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 101 {
 102         if (id & V4L2_STD_525_60) {
 103                 frameperiod->numerator = 1001;
 104                 frameperiod->denominator = 30000;
 105         } else {
 106                 frameperiod->numerator = 1;
 107                 frameperiod->denominator = 25;
 108         }
 109 }
 110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 111
 112 /* Fill in the fields of a v4l2_standard structure according to the
 113    'id' and 'transmission' parameters.  Returns negative on error.  */
 114 int v4l2_video_std_construct(struct v4l2_standard *vs,
 115                              int id, const char *name)
 116 {
 117         vs->id = id;
 118         v4l2_video_std_frame_period(id, &vs->frameperiod);
 119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 120         strscpy(vs->name, name, sizeof(vs->name));
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(v4l2_video_std_construct);
 124
 125 /* Fill in the fields of a v4l2_standard structure according to the
 126  * 'id' and 'vs->index' parameters. Returns negative on error. */
 127 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 128 {
 129         v4l2_std_id curr_id = 0;
 130         unsigned int index = vs->index, i, j = 0;
 131         const char *descr = "";
 132
 133         /* Return -ENODATA if the id for the current input
 134            or output is 0, meaning that it doesn't support this API. */
 135         if (id == 0)
 136                 return -ENODATA;
 137
 138         /* Return norm array in a canonical way */
 139         for (i = 0; i <= index && id; i++) {
 140                 /* last std value in the standards array is 0, so this
 141                    while always ends there since (id & 0) == 0. */
 142                 while ((id & standards[j].std) != standards[j].std)
 143                         j++;
 144                 curr_id = standards[j].std;
 145                 descr = standards[j].descr;
 146                 j++;
 147                 if (curr_id == 0)
 148                         break;
 149                 if (curr_id != V4L2_STD_PAL &&
 150                                 curr_id != V4L2_STD_SECAM &&
 151                                 curr_id != V4L2_STD_NTSC)
 152                         id &= ~curr_id;
 153         }
 154         if (i <= index)
 155                 return -EINVAL;
 156
 157         v4l2_video_std_construct(vs, curr_id, descr);
 158         return 0;
 159 }
 160
 161 /* ----------------------------------------------------------------- */
 162 /* some arrays for pretty-printing debug messages of enum types      */
 163
 164 const char *v4l2_field_names[] = {
 165         [V4L2_FIELD_ANY]        = "any",
 166         [V4L2_FIELD_NONE]       = "none",
 167         [V4L2_FIELD_TOP]        = "top",
 168         [V4L2_FIELD_BOTTOM]     = "bottom",
 169         [V4L2_FIELD_INTERLACED] = "interlaced",
 170         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 171         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 172         [V4L2_FIELD_ALTERNATE]  = "alternate",
 173         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 174         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 175 };
 176 EXPORT_SYMBOL(v4l2_field_names);
 177
 178 const char *v4l2_type_names[] = {
 179         [0]                                = "0",
 180         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 181         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 182         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 183         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 184         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 185         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 186         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 187         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 188         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 189         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 190         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 191         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 192         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 193         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 194 };
 195 EXPORT_SYMBOL(v4l2_type_names);
 196
 197 static const char *v4l2_memory_names[] = {
 198         [V4L2_MEMORY_MMAP]    = "mmap",
 199         [V4L2_MEMORY_USERPTR] = "userptr",
 200         [V4L2_MEMORY_OVERLAY] = "overlay",
 201         [V4L2_MEMORY_DMABUF] = "dmabuf",
 202 };
 203
 204 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 205
 206 /* ------------------------------------------------------------------ */
 207 /* debug help functions                                               */
 208
 209 static void v4l_print_querycap(const void *arg, bool write_only)
 210 {
 211         const struct v4l2_capability *p = arg;
 212
 213         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 214                 (int)sizeof(p->driver), p->driver,
 215                 (int)sizeof(p->card), p->card,
 216                 (int)sizeof(p->bus_info), p->bus_info,
 217                 p->version, p->capabilities, p->device_caps);
 218 }
 219
 220 static void v4l_print_enuminput(const void *arg, bool write_only)
 221 {
 222         const struct v4l2_input *p = arg;
 223
 224         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 225                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 226                 p->tuner, (unsigned long long)p->std, p->status,
 227                 p->capabilities);
 228 }
 229
 230 static void v4l_print_enumoutput(const void *arg, bool write_only)
 231 {
 232         const struct v4l2_output *p = arg;
 233
 234         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 235                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 236                 p->modulator, (unsigned long long)p->std, p->capabilities);
 237 }
 238
 239 static void v4l_print_audio(const void *arg, bool write_only)
 240 {
 241         const struct v4l2_audio *p = arg;
 242
 243         if (write_only)
 244                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 245         else
 246                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 247                         p->index, (int)sizeof(p->name), p->name,
 248                         p->capability, p->mode);
 249 }
 250
 251 static void v4l_print_audioout(const void *arg, bool write_only)
 252 {
 253         const struct v4l2_audioout *p = arg;
 254
 255         if (write_only)
 256                 pr_cont("index=%u\n", p->index);
 257         else
 258                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 259                         p->index, (int)sizeof(p->name), p->name,
 260                         p->capability, p->mode);
 261 }
 262
 263 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 264 {
 265         const struct v4l2_fmtdesc *p = arg;
 266
 267         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, 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_GRABBER &&
 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_GRABBER &&
 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_Y16:          descr = "16-bit Greyscale"; break;
1226         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1227         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1228         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1229         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1230         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1231         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1232         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1233         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1234         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1235         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1236         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1237         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1238         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1239         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1240         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1241         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1242         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1243         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1244         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1245         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1246         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1247         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1248         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1249         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1250         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1251         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1252         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1253         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1254         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1255         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1256         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1257         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1258         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1259         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1260         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1261         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1262         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1263         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1264         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1265         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1266         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1267         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1268         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1269         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1270         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1271         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1272         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1273         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1274         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1275         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1276         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1277         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1278         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1279         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1280         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1281         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1282         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1283         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1284         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1285         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1286         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1287         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1288         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1289         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1290         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1291         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1292         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1293         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1294         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1295         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1296         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1297         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1298         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1299         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1300         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1301         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1302         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1303         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1304         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1305         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1306         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1307         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1308         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1309         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1310         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1311         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1312         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1313         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1314         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1315         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1316         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1317         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1318         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1319         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1320         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1321         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1322         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1323         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1324         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1325         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1326         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1327         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1328         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1329         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1330         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1331         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1332         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1333         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1334         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1335         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1336         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1337         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1338         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1339         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1340         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1341         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1342         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1343         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1344
1345         default:
1346                 /* Compressed formats */
1347                 flags = V4L2_FMT_FLAG_COMPRESSED;
1348                 switch (fmt->pixelformat) {
1349                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1350                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1351                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1352                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1353                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1354                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1355                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1356                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1357                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1358                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1359                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1360                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1361                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1362                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1363                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1364                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1365                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1366                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1367                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1368                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1369                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1370                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1371                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1372                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1373                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1374                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1375                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1376                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1377                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1378                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1379                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1380                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1381                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1382                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1383                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1384                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1385                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1386                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1387                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1388                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1389                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1390                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1391                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1392                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1393                 default:
1394                         if (fmt->description[0])
1395                                 return;
1396                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1397                         flags = 0;
1398                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1399                                         (char)(fmt->pixelformat & 0x7f),
1400                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1401                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1402                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1403                                         (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1404                         break;
1405                 }
1406         }
1407
1408         if (descr)
1409                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1410         fmt->flags |= flags;
1411 }
1412
1413 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1414                                 struct file *file, void *fh, void *arg)
1415 {
1416         struct video_device *vdev = video_devdata(file);
1417         struct v4l2_fmtdesc *p = arg;
1418         int ret = check_fmt(file, p->type);
1419         u32 cap_mask;
1420
1421         if (ret)
1422                 return ret;
1423         ret = -EINVAL;
1424
1425         switch (p->type) {
1426         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1427         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1428                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1429                            V4L2_CAP_VIDEO_M2M_MPLANE;
1430                 if (!!(vdev->device_caps & cap_mask) !=
1431                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1432                         break;
1433
1434                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1435                         break;
1436                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1437                 break;
1438         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1439                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1440                         break;
1441                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1442                 break;
1443         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1444         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1445                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1446                            V4L2_CAP_VIDEO_M2M_MPLANE;
1447                 if (!!(vdev->device_caps & cap_mask) !=
1448                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1449                         break;
1450
1451                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1452                         break;
1453                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1454                 break;
1455         case V4L2_BUF_TYPE_SDR_CAPTURE:
1456                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1457                         break;
1458                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1459                 break;
1460         case V4L2_BUF_TYPE_SDR_OUTPUT:
1461                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1462                         break;
1463                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1464                 break;
1465         case V4L2_BUF_TYPE_META_CAPTURE:
1466                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1467                         break;
1468                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1469                 break;
1470         case V4L2_BUF_TYPE_META_OUTPUT:
1471                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1472                         break;
1473                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1474                 break;
1475         }
1476         if (ret == 0)
1477                 v4l_fill_fmtdesc(p);
1478         return ret;
1479 }
1480
1481 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1482 {
1483         /*
1484          * The v4l2_pix_format structure contains fields that make no sense for
1485          * touch. Set them to default values in this case.
1486          */
1487
1488         p->field = V4L2_FIELD_NONE;
1489         p->colorspace = V4L2_COLORSPACE_RAW;
1490         p->flags = 0;
1491         p->ycbcr_enc = 0;
1492         p->quantization = 0;
1493         p->xfer_func = 0;
1494 }
1495
1496 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1497                                 struct file *file, void *fh, void *arg)
1498 {
1499         struct v4l2_format *p = arg;
1500         struct video_device *vfd = video_devdata(file);
1501         int ret = check_fmt(file, p->type);
1502
1503         if (ret)
1504                 return ret;
1505
1506         /*
1507          * fmt can't be cleared for these overlay types due to the 'clips'
1508          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1509          * Those are provided by the user. So handle these two overlay types
1510          * first, and then just do a simple memset for the other types.
1511          */
1512         switch (p->type) {
1513         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1514         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1515                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1516                 u32 clipcount = p->fmt.win.clipcount;
1517                 void __user *bitmap = p->fmt.win.bitmap;
1518
1519                 memset(&p->fmt, 0, sizeof(p->fmt));
1520                 p->fmt.win.clips = clips;
1521                 p->fmt.win.clipcount = clipcount;
1522                 p->fmt.win.bitmap = bitmap;
1523                 break;
1524         }
1525         default:
1526                 memset(&p->fmt, 0, sizeof(p->fmt));
1527                 break;
1528         }
1529
1530         switch (p->type) {
1531         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1532                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1533                         break;
1534                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1535                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1536                 /* just in case the driver zeroed it again */
1537                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1538                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1539                         v4l_pix_format_touch(&p->fmt.pix);
1540                 return ret;
1541         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1542                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1543         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1544                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1545         case V4L2_BUF_TYPE_VBI_CAPTURE:
1546                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1547         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1548                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1549         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1550                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1551                         break;
1552                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1553                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1554                 /* just in case the driver zeroed it again */
1555                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1556                 return ret;
1557         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1558                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1559         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1560                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1561         case V4L2_BUF_TYPE_VBI_OUTPUT:
1562                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1563         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1564                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1565         case V4L2_BUF_TYPE_SDR_CAPTURE:
1566                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1567         case V4L2_BUF_TYPE_SDR_OUTPUT:
1568                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1569         case V4L2_BUF_TYPE_META_CAPTURE:
1570                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1571         case V4L2_BUF_TYPE_META_OUTPUT:
1572                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1573         }
1574         return -EINVAL;
1575 }
1576
1577 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1578                                 struct file *file, void *fh, void *arg)
1579 {
1580         struct v4l2_format *p = arg;
1581         struct video_device *vfd = video_devdata(file);
1582         int ret = check_fmt(file, p->type);
1583         unsigned int i;
1584
1585         if (ret)
1586                 return ret;
1587
1588         ret = v4l_enable_media_source(vfd);
1589         if (ret)
1590                 return ret;
1591         v4l_sanitize_format(p);
1592
1593         switch (p->type) {
1594         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1595                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1596                         break;
1597                 CLEAR_AFTER_FIELD(p, fmt.pix);
1598                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1599                 /* just in case the driver zeroed it again */
1600                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1601                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1602                         v4l_pix_format_touch(&p->fmt.pix);
1603                 return ret;
1604         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1605                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1606                         break;
1607                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1608                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1609                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1610                                           bytesperline);
1611                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1612         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1613                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1614                         break;
1615                 CLEAR_AFTER_FIELD(p, fmt.win);
1616                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1617         case V4L2_BUF_TYPE_VBI_CAPTURE:
1618                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1619                         break;
1620                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1621                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1622         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1623                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1624                         break;
1625                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1626                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1627         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1628                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1629                         break;
1630                 CLEAR_AFTER_FIELD(p, fmt.pix);
1631                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1632                 /* just in case the driver zeroed it again */
1633                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1634                 return ret;
1635         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1636                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1637                         break;
1638                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1639                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1640                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1641                                           bytesperline);
1642                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1643         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1644                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1645                         break;
1646                 CLEAR_AFTER_FIELD(p, fmt.win);
1647                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1648         case V4L2_BUF_TYPE_VBI_OUTPUT:
1649                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1650                         break;
1651                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1652                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1653         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1654                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1655                         break;
1656                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1657                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1658         case V4L2_BUF_TYPE_SDR_CAPTURE:
1659                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1660                         break;
1661                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1662                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1663         case V4L2_BUF_TYPE_SDR_OUTPUT:
1664                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1665                         break;
1666                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1667                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1668         case V4L2_BUF_TYPE_META_CAPTURE:
1669                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1670                         break;
1671                 CLEAR_AFTER_FIELD(p, fmt.meta);
1672                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1673         case V4L2_BUF_TYPE_META_OUTPUT:
1674                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.meta);
1677                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1678         }
1679         return -EINVAL;
1680 }
1681
1682 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1683                                 struct file *file, void *fh, void *arg)
1684 {
1685         struct v4l2_format *p = arg;
1686         struct video_device *vfd = video_devdata(file);
1687         int ret = check_fmt(file, p->type);
1688         unsigned int i;
1689
1690         if (ret)
1691                 return ret;
1692
1693         v4l_sanitize_format(p);
1694
1695         switch (p->type) {
1696         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1697                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1698                         break;
1699                 CLEAR_AFTER_FIELD(p, fmt.pix);
1700                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1701                 /* just in case the driver zeroed it again */
1702                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1703                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1704                         v4l_pix_format_touch(&p->fmt.pix);
1705                 return ret;
1706         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1707                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1708                         break;
1709                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1710                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1711                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1712                                           bytesperline);
1713                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1714         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1715                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1716                         break;
1717                 CLEAR_AFTER_FIELD(p, fmt.win);
1718                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1719         case V4L2_BUF_TYPE_VBI_CAPTURE:
1720                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1721                         break;
1722                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1723                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1724         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1725                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1726                         break;
1727                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1728                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1729         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1730                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1731                         break;
1732                 CLEAR_AFTER_FIELD(p, fmt.pix);
1733                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1734                 /* just in case the driver zeroed it again */
1735                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1736                 return ret;
1737         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1738                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1739                         break;
1740                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1741                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1742                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1743                                           bytesperline);
1744                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1745         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1746                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1747                         break;
1748                 CLEAR_AFTER_FIELD(p, fmt.win);
1749                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1750         case V4L2_BUF_TYPE_VBI_OUTPUT:
1751                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1752                         break;
1753                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1754                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1755         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1756                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1757                         break;
1758                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1759                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1760         case V4L2_BUF_TYPE_SDR_CAPTURE:
1761                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1762                         break;
1763                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1764                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1765         case V4L2_BUF_TYPE_SDR_OUTPUT:
1766                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1767                         break;
1768                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1769                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1770         case V4L2_BUF_TYPE_META_CAPTURE:
1771                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1772                         break;
1773                 CLEAR_AFTER_FIELD(p, fmt.meta);
1774                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1775         case V4L2_BUF_TYPE_META_OUTPUT:
1776                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1777                         break;
1778                 CLEAR_AFTER_FIELD(p, fmt.meta);
1779                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1780         }
1781         return -EINVAL;
1782 }
1783
1784 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1785                                 struct file *file, void *fh, void *arg)
1786 {
1787         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1788 }
1789
1790 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1791                                 struct file *file, void *fh, void *arg)
1792 {
1793         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1794 }
1795
1796 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1797                                 struct file *file, void *fh, void *arg)
1798 {
1799         struct video_device *vfd = video_devdata(file);
1800         struct v4l2_tuner *p = arg;
1801         int err;
1802
1803         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1804                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1805         err = ops->vidioc_g_tuner(file, fh, p);
1806         if (!err)
1807                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1808         return err;
1809 }
1810
1811 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1812                                 struct file *file, void *fh, void *arg)
1813 {
1814         struct video_device *vfd = video_devdata(file);
1815         struct v4l2_tuner *p = arg;
1816         int ret;
1817
1818         ret = v4l_enable_media_source(vfd);
1819         if (ret)
1820                 return ret;
1821         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1822                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1823         return ops->vidioc_s_tuner(file, fh, p);
1824 }
1825
1826 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1827                                 struct file *file, void *fh, void *arg)
1828 {
1829         struct video_device *vfd = video_devdata(file);
1830         struct v4l2_modulator *p = arg;
1831         int err;
1832
1833         if (vfd->vfl_type == VFL_TYPE_RADIO)
1834                 p->type = V4L2_TUNER_RADIO;
1835
1836         err = ops->vidioc_g_modulator(file, fh, p);
1837         if (!err)
1838                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1839         return err;
1840 }
1841
1842 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1843                                 struct file *file, void *fh, void *arg)
1844 {
1845         struct video_device *vfd = video_devdata(file);
1846         struct v4l2_modulator *p = arg;
1847
1848         if (vfd->vfl_type == VFL_TYPE_RADIO)
1849                 p->type = V4L2_TUNER_RADIO;
1850
1851         return ops->vidioc_s_modulator(file, fh, p);
1852 }
1853
1854 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1855                                 struct file *file, void *fh, void *arg)
1856 {
1857         struct video_device *vfd = video_devdata(file);
1858         struct v4l2_frequency *p = arg;
1859
1860         if (vfd->vfl_type == VFL_TYPE_SDR)
1861                 p->type = V4L2_TUNER_SDR;
1862         else
1863                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1864                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1865         return ops->vidioc_g_frequency(file, fh, p);
1866 }
1867
1868 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1869                                 struct file *file, void *fh, void *arg)
1870 {
1871         struct video_device *vfd = video_devdata(file);
1872         const struct v4l2_frequency *p = arg;
1873         enum v4l2_tuner_type type;
1874         int ret;
1875
1876         ret = v4l_enable_media_source(vfd);
1877         if (ret)
1878                 return ret;
1879         if (vfd->vfl_type == VFL_TYPE_SDR) {
1880                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1881                         return -EINVAL;
1882         } else {
1883                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1884                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1885                 if (type != p->type)
1886                         return -EINVAL;
1887         }
1888         return ops->vidioc_s_frequency(file, fh, p);
1889 }
1890
1891 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1892                                 struct file *file, void *fh, void *arg)
1893 {
1894         struct video_device *vfd = video_devdata(file);
1895         struct v4l2_standard *p = arg;
1896
1897         return v4l_video_std_enumstd(p, vfd->tvnorms);
1898 }
1899
1900 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1901                                 struct file *file, void *fh, void *arg)
1902 {
1903         struct video_device *vfd = video_devdata(file);
1904         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1905         int ret;
1906
1907         ret = v4l_enable_media_source(vfd);
1908         if (ret)
1909                 return ret;
1910         norm = id & vfd->tvnorms;
1911         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1912                 return -EINVAL;
1913
1914         /* Calls the specific handler */
1915         return ops->vidioc_s_std(file, fh, norm);
1916 }
1917
1918 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1919                                 struct file *file, void *fh, void *arg)
1920 {
1921         struct video_device *vfd = video_devdata(file);
1922         v4l2_std_id *p = arg;
1923         int ret;
1924
1925         ret = v4l_enable_media_source(vfd);
1926         if (ret)
1927                 return ret;
1928         /*
1929          * If no signal is detected, then the driver should return
1930          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1931          * any standards that do not apply removed.
1932          *
1933          * This means that tuners, audio and video decoders can join
1934          * their efforts to improve the standards detection.
1935          */
1936         *p = vfd->tvnorms;
1937         return ops->vidioc_querystd(file, fh, arg);
1938 }
1939
1940 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1941                                 struct file *file, void *fh, void *arg)
1942 {
1943         struct video_device *vfd = video_devdata(file);
1944         struct v4l2_hw_freq_seek *p = arg;
1945         enum v4l2_tuner_type type;
1946         int ret;
1947
1948         ret = v4l_enable_media_source(vfd);
1949         if (ret)
1950                 return ret;
1951         /* s_hw_freq_seek is not supported for SDR for now */
1952         if (vfd->vfl_type == VFL_TYPE_SDR)
1953                 return -EINVAL;
1954
1955         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1956                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1957         if (p->type != type)
1958                 return -EINVAL;
1959         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1960 }
1961
1962 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1963                                 struct file *file, void *fh, void *arg)
1964 {
1965         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1966 }
1967
1968 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1969                                 struct file *file, void *fh, void *arg)
1970 {
1971         struct v4l2_requestbuffers *p = arg;
1972         int ret = check_fmt(file, p->type);
1973
1974         if (ret)
1975                 return ret;
1976
1977         CLEAR_AFTER_FIELD(p, capabilities);
1978
1979         return ops->vidioc_reqbufs(file, fh, p);
1980 }
1981
1982 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1983                                 struct file *file, void *fh, void *arg)
1984 {
1985         struct v4l2_buffer *p = arg;
1986         int ret = check_fmt(file, p->type);
1987
1988         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1989 }
1990
1991 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1992                                 struct file *file, void *fh, void *arg)
1993 {
1994         struct v4l2_buffer *p = arg;
1995         int ret = check_fmt(file, p->type);
1996
1997         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1998 }
1999
2000 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2001                                 struct file *file, void *fh, void *arg)
2002 {
2003         struct v4l2_buffer *p = arg;
2004         int ret = check_fmt(file, p->type);
2005
2006         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2007 }
2008
2009 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2010                                 struct file *file, void *fh, void *arg)
2011 {
2012         struct v4l2_create_buffers *create = arg;
2013         int ret = check_fmt(file, create->format.type);
2014
2015         if (ret)
2016                 return ret;
2017
2018         CLEAR_AFTER_FIELD(create, capabilities);
2019
2020         v4l_sanitize_format(&create->format);
2021
2022         ret = ops->vidioc_create_bufs(file, fh, create);
2023
2024         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2025             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2026                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2027
2028         return ret;
2029 }
2030
2031 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2032                                 struct file *file, void *fh, void *arg)
2033 {
2034         struct v4l2_buffer *b = arg;
2035         int ret = check_fmt(file, b->type);
2036
2037         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2038 }
2039
2040 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2041                                 struct file *file, void *fh, void *arg)
2042 {
2043         struct v4l2_streamparm *p = arg;
2044         v4l2_std_id std;
2045         int ret = check_fmt(file, p->type);
2046
2047         if (ret)
2048                 return ret;
2049         if (ops->vidioc_g_parm)
2050                 return ops->vidioc_g_parm(file, fh, p);
2051         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2052             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2053                 return -EINVAL;
2054         p->parm.capture.readbuffers = 2;
2055         ret = ops->vidioc_g_std(file, fh, &std);
2056         if (ret == 0)
2057                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2058         return ret;
2059 }
2060
2061 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2062                                 struct file *file, void *fh, void *arg)
2063 {
2064         struct v4l2_streamparm *p = arg;
2065         int ret = check_fmt(file, p->type);
2066
2067         if (ret)
2068                 return ret;
2069
2070         /* Note: extendedmode is never used in drivers */
2071         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2072                 memset(p->parm.output.reserved, 0,
2073                        sizeof(p->parm.output.reserved));
2074                 p->parm.output.extendedmode = 0;
2075                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2076         } else {
2077                 memset(p->parm.capture.reserved, 0,
2078                        sizeof(p->parm.capture.reserved));
2079                 p->parm.capture.extendedmode = 0;
2080                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2081         }
2082         return ops->vidioc_s_parm(file, fh, p);
2083 }
2084
2085 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2086                                 struct file *file, void *fh, void *arg)
2087 {
2088         struct video_device *vfd = video_devdata(file);
2089         struct v4l2_queryctrl *p = arg;
2090         struct v4l2_fh *vfh =
2091                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2092
2093         if (vfh && vfh->ctrl_handler)
2094                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2095         if (vfd->ctrl_handler)
2096                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2097         if (ops->vidioc_queryctrl)
2098                 return ops->vidioc_queryctrl(file, fh, p);
2099         return -ENOTTY;
2100 }
2101
2102 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2103                                 struct file *file, void *fh, void *arg)
2104 {
2105         struct video_device *vfd = video_devdata(file);
2106         struct v4l2_query_ext_ctrl *p = arg;
2107         struct v4l2_fh *vfh =
2108                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2109
2110         if (vfh && vfh->ctrl_handler)
2111                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2112         if (vfd->ctrl_handler)
2113                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2114         if (ops->vidioc_query_ext_ctrl)
2115                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2116         return -ENOTTY;
2117 }
2118
2119 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2120                                 struct file *file, void *fh, void *arg)
2121 {
2122         struct video_device *vfd = video_devdata(file);
2123         struct v4l2_querymenu *p = arg;
2124         struct v4l2_fh *vfh =
2125                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2126
2127         if (vfh && vfh->ctrl_handler)
2128                 return v4l2_querymenu(vfh->ctrl_handler, p);
2129         if (vfd->ctrl_handler)
2130                 return v4l2_querymenu(vfd->ctrl_handler, p);
2131         if (ops->vidioc_querymenu)
2132                 return ops->vidioc_querymenu(file, fh, p);
2133         return -ENOTTY;
2134 }
2135
2136 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2137                                 struct file *file, void *fh, void *arg)
2138 {
2139         struct video_device *vfd = video_devdata(file);
2140         struct v4l2_control *p = arg;
2141         struct v4l2_fh *vfh =
2142                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2143         struct v4l2_ext_controls ctrls;
2144         struct v4l2_ext_control ctrl;
2145
2146         if (vfh && vfh->ctrl_handler)
2147                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2148         if (vfd->ctrl_handler)
2149                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2150         if (ops->vidioc_g_ctrl)
2151                 return ops->vidioc_g_ctrl(file, fh, p);
2152         if (ops->vidioc_g_ext_ctrls == NULL)
2153                 return -ENOTTY;
2154
2155         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2156         ctrls.count = 1;
2157         ctrls.controls = &ctrl;
2158         ctrl.id = p->id;
2159         ctrl.value = p->value;
2160         if (check_ext_ctrls(&ctrls, 1)) {
2161                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2162
2163                 if (ret == 0)
2164                         p->value = ctrl.value;
2165                 return ret;
2166         }
2167         return -EINVAL;
2168 }
2169
2170 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2171                                 struct file *file, void *fh, void *arg)
2172 {
2173         struct video_device *vfd = video_devdata(file);
2174         struct v4l2_control *p = arg;
2175         struct v4l2_fh *vfh =
2176                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2177         struct v4l2_ext_controls ctrls;
2178         struct v4l2_ext_control ctrl;
2179
2180         if (vfh && vfh->ctrl_handler)
2181                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2182         if (vfd->ctrl_handler)
2183                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2184         if (ops->vidioc_s_ctrl)
2185                 return ops->vidioc_s_ctrl(file, fh, p);
2186         if (ops->vidioc_s_ext_ctrls == NULL)
2187                 return -ENOTTY;
2188
2189         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2190         ctrls.count = 1;
2191         ctrls.controls = &ctrl;
2192         ctrl.id = p->id;
2193         ctrl.value = p->value;
2194         if (check_ext_ctrls(&ctrls, 1))
2195                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2196         return -EINVAL;
2197 }
2198
2199 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2200                                 struct file *file, void *fh, void *arg)
2201 {
2202         struct video_device *vfd = video_devdata(file);
2203         struct v4l2_ext_controls *p = arg;
2204         struct v4l2_fh *vfh =
2205                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2206
2207         p->error_idx = p->count;
2208         if (vfh && vfh->ctrl_handler)
2209                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2210                                         vfd, vfd->v4l2_dev->mdev, p);
2211         if (vfd->ctrl_handler)
2212                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2213                                         vfd, vfd->v4l2_dev->mdev, p);
2214         if (ops->vidioc_g_ext_ctrls == NULL)
2215                 return -ENOTTY;
2216         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2217                                         -EINVAL;
2218 }
2219
2220 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2221                                 struct file *file, void *fh, void *arg)
2222 {
2223         struct video_device *vfd = video_devdata(file);
2224         struct v4l2_ext_controls *p = arg;
2225         struct v4l2_fh *vfh =
2226                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2227
2228         p->error_idx = p->count;
2229         if (vfh && vfh->ctrl_handler)
2230                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2231                                         vfd, vfd->v4l2_dev->mdev, p);
2232         if (vfd->ctrl_handler)
2233                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2234                                         vfd, vfd->v4l2_dev->mdev, p);
2235         if (ops->vidioc_s_ext_ctrls == NULL)
2236                 return -ENOTTY;
2237         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2238                                         -EINVAL;
2239 }
2240
2241 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2242                                 struct file *file, void *fh, void *arg)
2243 {
2244         struct video_device *vfd = video_devdata(file);
2245         struct v4l2_ext_controls *p = arg;
2246         struct v4l2_fh *vfh =
2247                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2248
2249         p->error_idx = p->count;
2250         if (vfh && vfh->ctrl_handler)
2251                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2252                                           vfd, vfd->v4l2_dev->mdev, p);
2253         if (vfd->ctrl_handler)
2254                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2255                                           vfd, vfd->v4l2_dev->mdev, p);
2256         if (ops->vidioc_try_ext_ctrls == NULL)
2257                 return -ENOTTY;
2258         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2259                                         -EINVAL;
2260 }
2261
2262 /*
2263  * The selection API specified originally that the _MPLANE buffer types
2264  * shouldn't be used. The reasons for this are lost in the mists of time
2265  * (or just really crappy memories). Regardless, this is really annoying
2266  * for userspace. So to keep things simple we map _MPLANE buffer types
2267  * to their 'regular' counterparts before calling the driver. And we
2268  * restore it afterwards. This way applications can use either buffer
2269  * type and drivers don't need to check for both.
2270  */
2271 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2272                            struct file *file, void *fh, void *arg)
2273 {
2274         struct v4l2_selection *p = arg;
2275         u32 old_type = p->type;
2276         int ret;
2277
2278         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2279                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2280         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2281                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2282         ret = ops->vidioc_g_selection(file, fh, p);
2283         p->type = old_type;
2284         return ret;
2285 }
2286
2287 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2288                            struct file *file, void *fh, void *arg)
2289 {
2290         struct v4l2_selection *p = arg;
2291         u32 old_type = p->type;
2292         int ret;
2293
2294         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2295                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2296         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2297                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2298         ret = ops->vidioc_s_selection(file, fh, p);
2299         p->type = old_type;
2300         return ret;
2301 }
2302
2303 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2304                                 struct file *file, void *fh, void *arg)
2305 {
2306         struct video_device *vfd = video_devdata(file);
2307         struct v4l2_crop *p = arg;
2308         struct v4l2_selection s = {
2309                 .type = p->type,
2310         };
2311         int ret;
2312
2313         /* simulate capture crop using selection api */
2314
2315         /* crop means compose for output devices */
2316         if (V4L2_TYPE_IS_OUTPUT(p->type))
2317                 s.target = V4L2_SEL_TGT_COMPOSE;
2318         else
2319                 s.target = V4L2_SEL_TGT_CROP;
2320
2321         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2322                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2323                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2324
2325         ret = v4l_g_selection(ops, file, fh, &s);
2326
2327         /* copying results to old structure on success */
2328         if (!ret)
2329                 p->c = s.r;
2330         return ret;
2331 }
2332
2333 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2334                                 struct file *file, void *fh, void *arg)
2335 {
2336         struct video_device *vfd = video_devdata(file);
2337         struct v4l2_crop *p = arg;
2338         struct v4l2_selection s = {
2339                 .type = p->type,
2340                 .r = p->c,
2341         };
2342
2343         /* simulate capture crop using selection api */
2344
2345         /* crop means compose for output devices */
2346         if (V4L2_TYPE_IS_OUTPUT(p->type))
2347                 s.target = V4L2_SEL_TGT_COMPOSE;
2348         else
2349                 s.target = V4L2_SEL_TGT_CROP;
2350
2351         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2352                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2353                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2354
2355         return v4l_s_selection(ops, file, fh, &s);
2356 }
2357
2358 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2359                                 struct file *file, void *fh, void *arg)
2360 {
2361         struct video_device *vfd = video_devdata(file);
2362         struct v4l2_cropcap *p = arg;
2363         struct v4l2_selection s = { .type = p->type };
2364         int ret = 0;
2365
2366         /* setting trivial pixelaspect */
2367         p->pixelaspect.numerator = 1;
2368         p->pixelaspect.denominator = 1;
2369
2370         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2371                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2372         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2373                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2374
2375         /*
2376          * The determine_valid_ioctls() call already should ensure
2377          * that this can never happen, but just in case...
2378          */
2379         if (WARN_ON(!ops->vidioc_g_selection))
2380                 return -ENOTTY;
2381
2382         if (ops->vidioc_g_pixelaspect)
2383                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2384                                                 &p->pixelaspect);
2385
2386         /*
2387          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2388          * square pixel aspect ratio in that case.
2389          */
2390         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2391                 return ret;
2392
2393         /* Use g_selection() to fill in the bounds and defrect rectangles */
2394
2395         /* obtaining bounds */
2396         if (V4L2_TYPE_IS_OUTPUT(p->type))
2397                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2398         else
2399                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2400
2401         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2402                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2403                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2404
2405         ret = v4l_g_selection(ops, file, fh, &s);
2406         if (ret)
2407                 return ret;
2408         p->bounds = s.r;
2409
2410         /* obtaining defrect */
2411         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2412                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2413         else
2414                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2415
2416         ret = v4l_g_selection(ops, file, fh, &s);
2417         if (ret)
2418                 return ret;
2419         p->defrect = s.r;
2420
2421         return 0;
2422 }
2423
2424 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2425                                 struct file *file, void *fh, void *arg)
2426 {
2427         struct video_device *vfd = video_devdata(file);
2428         int ret;
2429
2430         if (vfd->v4l2_dev)
2431                 pr_info("%s: =================  START STATUS  =================\n",
2432                         vfd->v4l2_dev->name);
2433         ret = ops->vidioc_log_status(file, fh);
2434         if (vfd->v4l2_dev)
2435                 pr_info("%s: ==================  END STATUS  ==================\n",
2436                         vfd->v4l2_dev->name);
2437         return ret;
2438 }
2439
2440 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2441                                 struct file *file, void *fh, void *arg)
2442 {
2443 #ifdef CONFIG_VIDEO_ADV_DEBUG
2444         struct v4l2_dbg_register *p = arg;
2445         struct video_device *vfd = video_devdata(file);
2446         struct v4l2_subdev *sd;
2447         int idx = 0;
2448
2449         if (!capable(CAP_SYS_ADMIN))
2450                 return -EPERM;
2451         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2452                 if (vfd->v4l2_dev == NULL)
2453                         return -EINVAL;
2454                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2455                         if (p->match.addr == idx++)
2456                                 return v4l2_subdev_call(sd, core, g_register, p);
2457                 return -EINVAL;
2458         }
2459         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2460             (ops->vidioc_g_chip_info || p->match.addr == 0))
2461                 return ops->vidioc_g_register(file, fh, p);
2462         return -EINVAL;
2463 #else
2464         return -ENOTTY;
2465 #endif
2466 }
2467
2468 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2469                                 struct file *file, void *fh, void *arg)
2470 {
2471 #ifdef CONFIG_VIDEO_ADV_DEBUG
2472         const struct v4l2_dbg_register *p = arg;
2473         struct video_device *vfd = video_devdata(file);
2474         struct v4l2_subdev *sd;
2475         int idx = 0;
2476
2477         if (!capable(CAP_SYS_ADMIN))
2478                 return -EPERM;
2479         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2480                 if (vfd->v4l2_dev == NULL)
2481                         return -EINVAL;
2482                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2483                         if (p->match.addr == idx++)
2484                                 return v4l2_subdev_call(sd, core, s_register, p);
2485                 return -EINVAL;
2486         }
2487         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2488             (ops->vidioc_g_chip_info || p->match.addr == 0))
2489                 return ops->vidioc_s_register(file, fh, p);
2490         return -EINVAL;
2491 #else
2492         return -ENOTTY;
2493 #endif
2494 }
2495
2496 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2497                                 struct file *file, void *fh, void *arg)
2498 {
2499 #ifdef CONFIG_VIDEO_ADV_DEBUG
2500         struct video_device *vfd = video_devdata(file);
2501         struct v4l2_dbg_chip_info *p = arg;
2502         struct v4l2_subdev *sd;
2503         int idx = 0;
2504
2505         switch (p->match.type) {
2506         case V4L2_CHIP_MATCH_BRIDGE:
2507                 if (ops->vidioc_s_register)
2508                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2509                 if (ops->vidioc_g_register)
2510                         p->flags |= V4L2_CHIP_FL_READABLE;
2511                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2512                 if (ops->vidioc_g_chip_info)
2513                         return ops->vidioc_g_chip_info(file, fh, arg);
2514                 if (p->match.addr)
2515                         return -EINVAL;
2516                 return 0;
2517
2518         case V4L2_CHIP_MATCH_SUBDEV:
2519                 if (vfd->v4l2_dev == NULL)
2520                         break;
2521                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2522                         if (p->match.addr != idx++)
2523                                 continue;
2524                         if (sd->ops->core && sd->ops->core->s_register)
2525                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2526                         if (sd->ops->core && sd->ops->core->g_register)
2527                                 p->flags |= V4L2_CHIP_FL_READABLE;
2528                         strscpy(p->name, sd->name, sizeof(p->name));
2529                         return 0;
2530                 }
2531                 break;
2532         }
2533         return -EINVAL;
2534 #else
2535         return -ENOTTY;
2536 #endif
2537 }
2538
2539 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2540                                 struct file *file, void *fh, void *arg)
2541 {
2542         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2543 }
2544
2545 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2546                                 struct file *file, void *fh, void *arg)
2547 {
2548         return ops->vidioc_subscribe_event(fh, arg);
2549 }
2550
2551 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2552                                 struct file *file, void *fh, void *arg)
2553 {
2554         return ops->vidioc_unsubscribe_event(fh, arg);
2555 }
2556
2557 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2558                                 struct file *file, void *fh, void *arg)
2559 {
2560         struct v4l2_sliced_vbi_cap *p = arg;
2561         int ret = check_fmt(file, p->type);
2562
2563         if (ret)
2564                 return ret;
2565
2566         /* Clear up to type, everything after type is zeroed already */
2567         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2568
2569         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2570 }
2571
2572 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2573                                 struct file *file, void *fh, void *arg)
2574 {
2575         struct video_device *vfd = video_devdata(file);
2576         struct v4l2_frequency_band *p = arg;
2577         enum v4l2_tuner_type type;
2578         int err;
2579
2580         if (vfd->vfl_type == VFL_TYPE_SDR) {
2581                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2582                         return -EINVAL;
2583                 type = p->type;
2584         } else {
2585                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2586                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2587                 if (type != p->type)
2588                         return -EINVAL;
2589         }
2590         if (ops->vidioc_enum_freq_bands) {
2591                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2592                 if (err != -ENOTTY)
2593                         return err;
2594         }
2595         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2596                 struct v4l2_tuner t = {
2597                         .index = p->tuner,
2598                         .type = type,
2599                 };
2600
2601                 if (p->index)
2602                         return -EINVAL;
2603                 err = ops->vidioc_g_tuner(file, fh, &t);
2604                 if (err)
2605                         return err;
2606                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2607                 p->rangelow = t.rangelow;
2608                 p->rangehigh = t.rangehigh;
2609                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2610                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2611                 return 0;
2612         }
2613         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2614                 struct v4l2_modulator m = {
2615                         .index = p->tuner,
2616                 };
2617
2618                 if (type != V4L2_TUNER_RADIO)
2619                         return -EINVAL;
2620                 if (p->index)
2621                         return -EINVAL;
2622                 err = ops->vidioc_g_modulator(file, fh, &m);
2623                 if (err)
2624                         return err;
2625                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2626                 p->rangelow = m.rangelow;
2627                 p->rangehigh = m.rangehigh;
2628                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2629                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2630                 return 0;
2631         }
2632         return -ENOTTY;
2633 }
2634
2635 struct v4l2_ioctl_info {
2636         unsigned int ioctl;
2637         u32 flags;
2638         const char * const name;
2639         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2640                     void *fh, void *p);
2641         void (*debug)(const void *arg, bool write_only);
2642 };
2643
2644 /* This control needs a priority check */
2645 #define INFO_FL_PRIO            (1 << 0)
2646 /* This control can be valid if the filehandle passes a control handler. */
2647 #define INFO_FL_CTRL            (1 << 1)
2648 /* Queuing ioctl */
2649 #define INFO_FL_QUEUE           (1 << 2)
2650 /* Always copy back result, even on error */
2651 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2652 /* Zero struct from after the field to the end */
2653 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2654         ((offsetof(struct v4l2_struct, field) +                 \
2655           sizeof_field(struct v4l2_struct, field)) << 16)
2656 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2657
2658 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2659         static int v4l_stub_ ## _vidioc(                        \
2660                         const struct v4l2_ioctl_ops *ops,       \
2661                         struct file *file, void *fh, void *p)   \
2662         {                                                       \
2663                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2664         }
2665
2666 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2667         [_IOC_NR(_ioctl)] = {                                   \
2668                 .ioctl = _ioctl,                                \
2669                 .flags = _flags,                                \
2670                 .name = #_ioctl,                                \
2671                 .func = _func,                                  \
2672                 .debug = _debug,                                \
2673         }
2674
2675 DEFINE_V4L_STUB_FUNC(g_fbuf)
2676 DEFINE_V4L_STUB_FUNC(s_fbuf)
2677 DEFINE_V4L_STUB_FUNC(expbuf)
2678 DEFINE_V4L_STUB_FUNC(g_std)
2679 DEFINE_V4L_STUB_FUNC(g_audio)
2680 DEFINE_V4L_STUB_FUNC(s_audio)
2681 DEFINE_V4L_STUB_FUNC(g_input)
2682 DEFINE_V4L_STUB_FUNC(g_edid)
2683 DEFINE_V4L_STUB_FUNC(s_edid)
2684 DEFINE_V4L_STUB_FUNC(g_output)
2685 DEFINE_V4L_STUB_FUNC(g_audout)
2686 DEFINE_V4L_STUB_FUNC(s_audout)
2687 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2688 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2689 DEFINE_V4L_STUB_FUNC(enumaudio)
2690 DEFINE_V4L_STUB_FUNC(enumaudout)
2691 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2692 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2693 DEFINE_V4L_STUB_FUNC(g_enc_index)
2694 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2695 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2696 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2697 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2698 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2699 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2700 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2701 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2702 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2703
2704 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2705         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2706         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2707         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2708         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2709         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2710         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2711         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2712         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2713         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2714         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2715         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2716         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2717         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2718         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2719         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2720         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2721         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2722         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2723         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2724         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2725         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2726         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2727         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2728         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2729         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2730         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2731         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2732         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2733         IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2734         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2735         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2736         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2737         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2738         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2739         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2740         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2741         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2742         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2743         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2744         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2745         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2746         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2747         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2748         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2749         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2750         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2751         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2752         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2753         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2754         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2755         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2756         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2757         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2758         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2759         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)),
2760         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2761         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2762         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2763         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2764         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2765         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2766         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2767         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2768         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2769         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2770         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2771         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2772         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2773         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2774         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)),
2775         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2776         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2777         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2778         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2779         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2780         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2781         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2782         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2783         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2784         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2785         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)),
2786         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)),
2787 };
2788 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2789
2790 static bool v4l2_is_known_ioctl(unsigned int cmd)
2791 {
2792         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2793                 return false;
2794         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2795 }
2796
2797 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2798                                          struct v4l2_fh *vfh, unsigned int cmd,
2799                                          void *arg)
2800 {
2801         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2802                 return vdev->lock;
2803 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2804         if (vfh && vfh->m2m_ctx &&
2805             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2806                 if (vfh->m2m_ctx->q_lock)
2807                         return vfh->m2m_ctx->q_lock;
2808         }
2809 #endif
2810         if (vdev->queue && vdev->queue->lock &&
2811                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2812                 return vdev->queue->lock;
2813         return vdev->lock;
2814 }
2815
2816 /* Common ioctl debug function. This function can be used by
2817    external ioctl messages as well as internal V4L ioctl */
2818 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2819 {
2820         const char *dir, *type;
2821
2822         if (prefix)
2823                 printk(KERN_DEBUG "%s: ", prefix);
2824
2825         switch (_IOC_TYPE(cmd)) {
2826         case 'd':
2827                 type = "v4l2_int";
2828                 break;
2829         case 'V':
2830                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2831                         type = "v4l2";
2832                         break;
2833                 }
2834                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2835                 return;
2836         default:
2837                 type = "unknown";
2838                 break;
2839         }
2840
2841         switch (_IOC_DIR(cmd)) {
2842         case _IOC_NONE:              dir = "--"; break;
2843         case _IOC_READ:              dir = "r-"; break;
2844         case _IOC_WRITE:             dir = "-w"; break;
2845         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2846         default:                     dir = "*ERR*"; break;
2847         }
2848         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2849                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2850 }
2851 EXPORT_SYMBOL(v4l_printk_ioctl);
2852
2853 static long __video_do_ioctl(struct file *file,
2854                 unsigned int cmd, void *arg)
2855 {
2856         struct video_device *vfd = video_devdata(file);
2857         struct mutex *req_queue_lock = NULL;
2858         struct mutex *lock; /* ioctl serialization mutex */
2859         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2860         bool write_only = false;
2861         struct v4l2_ioctl_info default_info;
2862         const struct v4l2_ioctl_info *info;
2863         void *fh = file->private_data;
2864         struct v4l2_fh *vfh = NULL;
2865         int dev_debug = vfd->dev_debug;
2866         long ret = -ENOTTY;
2867
2868         if (ops == NULL) {
2869                 pr_warn("%s: has no ioctl_ops.\n",
2870                                 video_device_node_name(vfd));
2871                 return ret;
2872         }
2873
2874         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2875                 vfh = file->private_data;
2876
2877         /*
2878          * We need to serialize streamon/off with queueing new requests.
2879          * These ioctls may trigger the cancellation of a streaming
2880          * operation, and that should not be mixed with queueing a new
2881          * request at the same time.
2882          */
2883         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2884             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2885                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2886
2887                 if (mutex_lock_interruptible(req_queue_lock))
2888                         return -ERESTARTSYS;
2889         }
2890
2891         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2892
2893         if (lock && mutex_lock_interruptible(lock)) {
2894                 if (req_queue_lock)
2895                         mutex_unlock(req_queue_lock);
2896                 return -ERESTARTSYS;
2897         }
2898
2899         if (!video_is_registered(vfd)) {
2900                 ret = -ENODEV;
2901                 goto unlock;
2902         }
2903
2904         if (v4l2_is_known_ioctl(cmd)) {
2905                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2906
2907                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2908                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2909                         goto done;
2910
2911                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2912                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2913                         if (ret)
2914                                 goto done;
2915                 }
2916         } else {
2917                 default_info.ioctl = cmd;
2918                 default_info.flags = 0;
2919                 default_info.debug = v4l_print_default;
2920                 info = &default_info;
2921         }
2922
2923         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2924         if (info != &default_info) {
2925                 ret = info->func(ops, file, fh, arg);
2926         } else if (!ops->vidioc_default) {
2927                 ret = -ENOTTY;
2928         } else {
2929                 ret = ops->vidioc_default(file, fh,
2930                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2931                         cmd, arg);
2932         }
2933
2934 done:
2935         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2936                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2937                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2938                         goto unlock;
2939
2940                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2941                 if (ret < 0)
2942                         pr_cont(": error %ld", ret);
2943                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2944                         pr_cont("\n");
2945                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2946                         info->debug(arg, write_only);
2947                 else {
2948                         pr_cont(": ");
2949                         info->debug(arg, write_only);
2950                 }
2951         }
2952
2953 unlock:
2954         if (lock)
2955                 mutex_unlock(lock);
2956         if (req_queue_lock)
2957                 mutex_unlock(req_queue_lock);
2958         return ret;
2959 }
2960
2961 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2962                             void __user **user_ptr, void ***kernel_ptr)
2963 {
2964         int ret = 0;
2965
2966         switch (cmd) {
2967         case VIDIOC_PREPARE_BUF:
2968         case VIDIOC_QUERYBUF:
2969         case VIDIOC_QBUF:
2970         case VIDIOC_DQBUF: {
2971                 struct v4l2_buffer *buf = parg;
2972
2973                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2974                         if (buf->length > VIDEO_MAX_PLANES) {
2975                                 ret = -EINVAL;
2976                                 break;
2977                         }
2978                         *user_ptr = (void __user *)buf->m.planes;
2979                         *kernel_ptr = (void **)&buf->m.planes;
2980                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2981                         ret = 1;
2982                 }
2983                 break;
2984         }
2985
2986         case VIDIOC_G_EDID:
2987         case VIDIOC_S_EDID: {
2988                 struct v4l2_edid *edid = parg;
2989
2990                 if (edid->blocks) {
2991                         if (edid->blocks > 256) {
2992                                 ret = -EINVAL;
2993                                 break;
2994                         }
2995                         *user_ptr = (void __user *)edid->edid;
2996                         *kernel_ptr = (void **)&edid->edid;
2997                         *array_size = edid->blocks * 128;
2998                         ret = 1;
2999                 }
3000                 break;
3001         }
3002
3003         case VIDIOC_S_EXT_CTRLS:
3004         case VIDIOC_G_EXT_CTRLS:
3005         case VIDIOC_TRY_EXT_CTRLS: {
3006                 struct v4l2_ext_controls *ctrls = parg;
3007
3008                 if (ctrls->count != 0) {
3009                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3010                                 ret = -EINVAL;
3011                                 break;
3012                         }
3013                         *user_ptr = (void __user *)ctrls->controls;
3014                         *kernel_ptr = (void **)&ctrls->controls;
3015                         *array_size = sizeof(struct v4l2_ext_control)
3016                                     * ctrls->count;
3017                         ret = 1;
3018                 }
3019                 break;
3020         }
3021         }
3022
3023         return ret;
3024 }
3025
3026 static unsigned int video_translate_cmd(unsigned int cmd)
3027 {
3028         switch (cmd) {
3029 #ifdef CONFIG_COMPAT_32BIT_TIME
3030         case VIDIOC_DQEVENT_TIME32:
3031                 return VIDIOC_DQEVENT;
3032         case VIDIOC_QUERYBUF_TIME32:
3033                 return VIDIOC_QUERYBUF;
3034         case VIDIOC_QBUF_TIME32:
3035                 return VIDIOC_QBUF;
3036         case VIDIOC_DQBUF_TIME32:
3037                 return VIDIOC_DQBUF;
3038         case VIDIOC_PREPARE_BUF_TIME32:
3039                 return VIDIOC_PREPARE_BUF;
3040 #endif
3041         }
3042
3043         return cmd;
3044 }
3045
3046 static int video_get_user(void __user *arg, void *parg, unsigned int cmd,
3047                           bool *always_copy)
3048 {
3049         unsigned int n = _IOC_SIZE(cmd);
3050
3051         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3052                 /* read-only ioctl */
3053                 memset(parg, 0, n);
3054                 return 0;
3055         }
3056
3057         switch (cmd) {
3058 #ifdef CONFIG_COMPAT_32BIT_TIME
3059         case VIDIOC_QUERYBUF_TIME32:
3060         case VIDIOC_QBUF_TIME32:
3061         case VIDIOC_DQBUF_TIME32:
3062         case VIDIOC_PREPARE_BUF_TIME32: {
3063                 struct v4l2_buffer_time32 vb32;
3064                 struct v4l2_buffer *vb = parg;
3065
3066                 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3067                         return -EFAULT;
3068
3069                 *vb = (struct v4l2_buffer) {
3070                         .index          = vb32.index,
3071                         .type           = vb32.type,
3072                         .bytesused      = vb32.bytesused,
3073                         .flags          = vb32.flags,
3074                         .field          = vb32.field,
3075                         .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3076                         .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3077                         .timecode       = vb32.timecode,
3078                         .sequence       = vb32.sequence,
3079                         .memory         = vb32.memory,
3080                         .m.userptr      = vb32.m.userptr,
3081                         .length         = vb32.length,
3082                         .request_fd     = vb32.request_fd,
3083                 };
3084
3085                 if (cmd == VIDIOC_QUERYBUF_TIME32)
3086                         vb->request_fd = 0;
3087
3088                 break;
3089         }
3090 #endif
3091         default:
3092                 /*
3093                  * In some cases, only a few fields are used as input,
3094                  * i.e. when the app sets "index" and then the driver
3095                  * fills in the rest of the structure for the thing
3096                  * with that index.  We only need to copy up the first
3097                  * non-input field.
3098                  */
3099                 if (v4l2_is_known_ioctl(cmd)) {
3100                         u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3101
3102                         if (flags & INFO_FL_CLEAR_MASK)
3103                                 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3104                         *always_copy = flags & INFO_FL_ALWAYS_COPY;
3105                 }
3106
3107                 if (copy_from_user(parg, (void __user *)arg, n))
3108                         return -EFAULT;
3109
3110                 /* zero out anything we don't copy from userspace */
3111                 if (n < _IOC_SIZE(cmd))
3112                         memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
3113                 break;
3114         }
3115
3116         return 0;
3117 }
3118
3119 static int video_put_user(void __user *arg, void *parg, unsigned int cmd)
3120 {
3121         if (!(_IOC_DIR(cmd) & _IOC_READ))
3122                 return 0;
3123
3124         switch (cmd) {
3125 #ifdef CONFIG_COMPAT_32BIT_TIME
3126         case VIDIOC_DQEVENT_TIME32: {
3127                 struct v4l2_event *ev = parg;
3128                 struct v4l2_event_time32 ev32 = {
3129                         .type           = ev->type,
3130                         .pending        = ev->pending,
3131                         .sequence       = ev->sequence,
3132                         .timestamp.tv_sec  = ev->timestamp.tv_sec,
3133                         .timestamp.tv_nsec = ev->timestamp.tv_nsec,
3134                         .id             = ev->id,
3135                 };
3136
3137                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3138                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3139
3140                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3141                         return -EFAULT;
3142                 break;
3143         }
3144         case VIDIOC_QUERYBUF_TIME32:
3145         case VIDIOC_QBUF_TIME32:
3146         case VIDIOC_DQBUF_TIME32:
3147         case VIDIOC_PREPARE_BUF_TIME32: {
3148                 struct v4l2_buffer *vb = parg;
3149                 struct v4l2_buffer_time32 vb32 = {
3150                         .index          = vb->index,
3151                         .type           = vb->type,
3152                         .bytesused      = vb->bytesused,
3153                         .flags          = vb->flags,
3154                         .field          = vb->field,
3155                         .timestamp.tv_sec       = vb->timestamp.tv_sec,
3156                         .timestamp.tv_usec      = vb->timestamp.tv_usec,
3157                         .timecode       = vb->timecode,
3158                         .sequence       = vb->sequence,
3159                         .memory         = vb->memory,
3160                         .m.userptr      = vb->m.userptr,
3161                         .length         = vb->length,
3162                         .request_fd     = vb->request_fd,
3163                 };
3164
3165                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3166                         return -EFAULT;
3167                 break;
3168         }
3169 #endif
3170         default:
3171                 /*  Copy results into user buffer  */
3172                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3173                         return -EFAULT;
3174                 break;
3175         }
3176
3177         return 0;
3178 }
3179
3180 long
3181 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3182                v4l2_kioctl func)
3183 {
3184         char    sbuf[128];
3185         void    *mbuf = NULL;
3186         void    *parg = (void *)arg;
3187         long    err  = -EINVAL;
3188         bool    has_array_args;
3189         bool    always_copy = false;
3190         size_t  array_size = 0;
3191         void __user *user_ptr = NULL;
3192         void    **kernel_ptr = NULL;
3193         unsigned int cmd = video_translate_cmd(orig_cmd);
3194         const size_t ioc_size = _IOC_SIZE(cmd);
3195
3196         /*  Copy arguments into temp kernel buffer  */
3197         if (_IOC_DIR(cmd) != _IOC_NONE) {
3198                 if (ioc_size <= sizeof(sbuf)) {
3199                         parg = sbuf;
3200                 } else {
3201                         /* too big to allocate from stack */
3202                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3203                         if (NULL == mbuf)
3204                                 return -ENOMEM;
3205                         parg = mbuf;
3206                 }
3207
3208                 err = video_get_user((void __user *)arg, parg, orig_cmd,
3209                                      &always_copy);
3210                 if (err)
3211                         goto out;
3212         }
3213
3214         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3215         if (err < 0)
3216                 goto out;
3217         has_array_args = err;
3218
3219         if (has_array_args) {
3220                 /*
3221                  * When adding new types of array args, make sure that the
3222                  * parent argument to ioctl (which contains the pointer to the
3223                  * array) fits into sbuf (so that mbuf will still remain
3224                  * unused up to here).
3225                  */
3226                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3227                 err = -ENOMEM;
3228                 if (NULL == mbuf)
3229                         goto out_array_args;
3230                 err = -EFAULT;
3231                 if (copy_from_user(mbuf, user_ptr, array_size))
3232                         goto out_array_args;
3233                 *kernel_ptr = mbuf;
3234         }
3235
3236         /* Handles IOCTL */
3237         err = func(file, cmd, parg);
3238         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3239                 err = -ENOTTY;
3240                 goto out;
3241         }
3242
3243         if (err == 0) {
3244                 if (cmd == VIDIOC_DQBUF)
3245                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3246                 else if (cmd == VIDIOC_QBUF)
3247                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3248         }
3249
3250         if (has_array_args) {
3251                 *kernel_ptr = (void __force *)user_ptr;
3252                 if (copy_to_user(user_ptr, mbuf, array_size))
3253                         err = -EFAULT;
3254                 goto out_array_args;
3255         }
3256         /*
3257          * Some ioctls can return an error, but still have valid
3258          * results that must be returned.
3259          */
3260         if (err < 0 && !always_copy)
3261                 goto out;
3262
3263 out_array_args:
3264         if (video_put_user((void __user *)arg, parg, orig_cmd))
3265                 err = -EFAULT;
3266 out:
3267         kvfree(mbuf);
3268         return err;
3269 }
3270
3271 long video_ioctl2(struct file *file,
3272                unsigned int cmd, unsigned long arg)
3273 {
3274         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3275 }
3276 EXPORT_SYMBOL(video_ioctl2);