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/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/videodev2.h>
  20
  21 #include <media/media-device.h> /* for media_set_bus_info() */
  22 #include <media/v4l2-common.h>
  23 #include <media/v4l2-ioctl.h>
  24 #include <media/v4l2-ctrls.h>
  25 #include <media/v4l2-fh.h>
  26 #include <media/v4l2-event.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/videobuf2-v4l2.h>
  29 #include <media/v4l2-mc.h>
  30 #include <media/v4l2-mem2mem.h>
  31
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparisons. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strscpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* Fill in the fields of a v4l2_standard structure according to the
 128  * 'id' and 'vs->index' parameters. Returns negative on error. */
 129 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 130 {
 131         v4l2_std_id curr_id = 0;
 132         unsigned int index = vs->index, i, j = 0;
 133         const char *descr = "";
 134
 135         /* Return -ENODATA if the id for the current input
 136            or output is 0, meaning that it doesn't support this API. */
 137         if (id == 0)
 138                 return -ENODATA;
 139
 140         /* Return norm array in a canonical way */
 141         for (i = 0; i <= index && id; i++) {
 142                 /* last std value in the standards array is 0, so this
 143                    while always ends there since (id & 0) == 0. */
 144                 while ((id & standards[j].std) != standards[j].std)
 145                         j++;
 146                 curr_id = standards[j].std;
 147                 descr = standards[j].descr;
 148                 j++;
 149                 if (curr_id == 0)
 150                         break;
 151                 if (curr_id != V4L2_STD_PAL &&
 152                                 curr_id != V4L2_STD_SECAM &&
 153                                 curr_id != V4L2_STD_NTSC)
 154                         id &= ~curr_id;
 155         }
 156         if (i <= index)
 157                 return -EINVAL;
 158
 159         v4l2_video_std_construct(vs, curr_id, descr);
 160         return 0;
 161 }
 162
 163 /* ----------------------------------------------------------------- */
 164 /* some arrays for pretty-printing debug messages of enum types      */
 165
 166 const char *v4l2_field_names[] = {
 167         [V4L2_FIELD_ANY]        = "any",
 168         [V4L2_FIELD_NONE]       = "none",
 169         [V4L2_FIELD_TOP]        = "top",
 170         [V4L2_FIELD_BOTTOM]     = "bottom",
 171         [V4L2_FIELD_INTERLACED] = "interlaced",
 172         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 173         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 174         [V4L2_FIELD_ALTERNATE]  = "alternate",
 175         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 176         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 177 };
 178 EXPORT_SYMBOL(v4l2_field_names);
 179
 180 const char *v4l2_type_names[] = {
 181         [0]                                = "0",
 182         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 183         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 184         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 185         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 186         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 187         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 188         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 189         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 190         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 191         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 192         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 193         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 194         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 195         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 196 };
 197 EXPORT_SYMBOL(v4l2_type_names);
 198
 199 static const char *v4l2_memory_names[] = {
 200         [V4L2_MEMORY_MMAP]    = "mmap",
 201         [V4L2_MEMORY_USERPTR] = "userptr",
 202         [V4L2_MEMORY_OVERLAY] = "overlay",
 203         [V4L2_MEMORY_DMABUF] = "dmabuf",
 204 };
 205
 206 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 207
 208 /* ------------------------------------------------------------------ */
 209 /* debug help functions                                               */
 210
 211 static void v4l_print_querycap(const void *arg, bool write_only)
 212 {
 213         const struct v4l2_capability *p = arg;
 214
 215         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 216                 (int)sizeof(p->driver), p->driver,
 217                 (int)sizeof(p->card), p->card,
 218                 (int)sizeof(p->bus_info), p->bus_info,
 219                 p->version, p->capabilities, p->device_caps);
 220 }
 221
 222 static void v4l_print_enuminput(const void *arg, bool write_only)
 223 {
 224         const struct v4l2_input *p = arg;
 225
 226         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 227                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 228                 p->tuner, (unsigned long long)p->std, p->status,
 229                 p->capabilities);
 230 }
 231
 232 static void v4l_print_enumoutput(const void *arg, bool write_only)
 233 {
 234         const struct v4l2_output *p = arg;
 235
 236         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 237                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 238                 p->modulator, (unsigned long long)p->std, p->capabilities);
 239 }
 240
 241 static void v4l_print_audio(const void *arg, bool write_only)
 242 {
 243         const struct v4l2_audio *p = arg;
 244
 245         if (write_only)
 246                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 247         else
 248                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 249                         p->index, (int)sizeof(p->name), p->name,
 250                         p->capability, p->mode);
 251 }
 252
 253 static void v4l_print_audioout(const void *arg, bool write_only)
 254 {
 255         const struct v4l2_audioout *p = arg;
 256
 257         if (write_only)
 258                 pr_cont("index=%u\n", p->index);
 259         else
 260                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 261                         p->index, (int)sizeof(p->name), p->name,
 262                         p->capability, p->mode);
 263 }
 264
 265 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 266 {
 267         const struct v4l2_fmtdesc *p = arg;
 268
 269         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 270                 p->index, prt_names(p->type, v4l2_type_names),
 271                 p->flags, &p->pixelformat, p->mbus_code,
 272                 (int)sizeof(p->description), p->description);
 273 }
 274
 275 static void v4l_print_format(const void *arg, bool write_only)
 276 {
 277         const struct v4l2_format *p = arg;
 278         const struct v4l2_pix_format *pix;
 279         const struct v4l2_pix_format_mplane *mp;
 280         const struct v4l2_vbi_format *vbi;
 281         const struct v4l2_sliced_vbi_format *sliced;
 282         const struct v4l2_window *win;
 283         const struct v4l2_meta_format *meta;
 284         u32 pixelformat;
 285         u32 planes;
 286         unsigned i;
 287
 288         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 289         switch (p->type) {
 290         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 291         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 292                 pix = &p->fmt.pix;
 293                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 294                         pix->width, pix->height, &pix->pixelformat,
 295                         prt_names(pix->field, v4l2_field_names),
 296                         pix->bytesperline, pix->sizeimage,
 297                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 298                         pix->quantization, pix->xfer_func);
 299                 break;
 300         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 301         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 302                 mp = &p->fmt.pix_mp;
 303                 pixelformat = mp->pixelformat;
 304                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 305                         mp->width, mp->height, &pixelformat,
 306                         prt_names(mp->field, v4l2_field_names),
 307                         mp->colorspace, mp->num_planes, mp->flags,
 308                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 309                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 310                 for (i = 0; i < planes; i++)
 311                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 312                                         mp->plane_fmt[i].bytesperline,
 313                                         mp->plane_fmt[i].sizeimage);
 314                 break;
 315         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 316         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 317                 win = &p->fmt.win;
 318                 /* Note: we can't print the clip list here since the clips
 319                  * pointer is a userspace pointer, not a kernelspace
 320                  * pointer. */
 321                 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",
 322                         win->w.width, win->w.height, win->w.left, win->w.top,
 323                         prt_names(win->field, v4l2_field_names),
 324                         win->chromakey, win->clipcount, win->clips,
 325                         win->bitmap, win->global_alpha);
 326                 break;
 327         case V4L2_BUF_TYPE_VBI_CAPTURE:
 328         case V4L2_BUF_TYPE_VBI_OUTPUT:
 329                 vbi = &p->fmt.vbi;
 330                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 331                         vbi->sampling_rate, vbi->offset,
 332                         vbi->samples_per_line, &vbi->sample_format,
 333                         vbi->start[0], vbi->start[1],
 334                         vbi->count[0], vbi->count[1]);
 335                 break;
 336         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 337         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 338                 sliced = &p->fmt.sliced;
 339                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 340                                 sliced->service_set, sliced->io_size);
 341                 for (i = 0; i < 24; i++)
 342                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 343                                 sliced->service_lines[0][i],
 344                                 sliced->service_lines[1][i]);
 345                 break;
 346         case V4L2_BUF_TYPE_SDR_CAPTURE:
 347         case V4L2_BUF_TYPE_SDR_OUTPUT:
 348                 pixelformat = p->fmt.sdr.pixelformat;
 349                 pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 350                 break;
 351         case V4L2_BUF_TYPE_META_CAPTURE:
 352         case V4L2_BUF_TYPE_META_OUTPUT:
 353                 meta = &p->fmt.meta;
 354                 pixelformat = meta->dataformat;
 355                 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 356                         &pixelformat, meta->buffersize);
 357                 break;
 358         }
 359 }
 360
 361 static void v4l_print_framebuffer(const void *arg, bool write_only)
 362 {
 363         const struct v4l2_framebuffer *p = arg;
 364
 365         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 366                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 367                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 368                 p->fmt.colorspace);
 369 }
 370
 371 static void v4l_print_buftype(const void *arg, bool write_only)
 372 {
 373         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 374 }
 375
 376 static void v4l_print_modulator(const void *arg, bool write_only)
 377 {
 378         const struct v4l2_modulator *p = arg;
 379
 380         if (write_only)
 381                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 382         else
 383                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 384                         p->index, (int)sizeof(p->name), p->name, p->capability,
 385                         p->rangelow, p->rangehigh, p->txsubchans);
 386 }
 387
 388 static void v4l_print_tuner(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_tuner *p = arg;
 391
 392         if (write_only)
 393                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 394         else
 395                 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",
 396                         p->index, (int)sizeof(p->name), p->name, p->type,
 397                         p->capability, p->rangelow,
 398                         p->rangehigh, p->signal, p->afc,
 399                         p->rxsubchans, p->audmode);
 400 }
 401
 402 static void v4l_print_frequency(const void *arg, bool write_only)
 403 {
 404         const struct v4l2_frequency *p = arg;
 405
 406         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 407                                 p->tuner, p->type, p->frequency);
 408 }
 409
 410 static void v4l_print_standard(const void *arg, bool write_only)
 411 {
 412         const struct v4l2_standard *p = arg;
 413
 414         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 415                 p->index,
 416                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 417                 p->frameperiod.numerator,
 418                 p->frameperiod.denominator,
 419                 p->framelines);
 420 }
 421
 422 static void v4l_print_std(const void *arg, bool write_only)
 423 {
 424         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 425 }
 426
 427 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 428 {
 429         const struct v4l2_hw_freq_seek *p = arg;
 430
 431         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 432                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 433                 p->rangelow, p->rangehigh);
 434 }
 435
 436 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 437 {
 438         const struct v4l2_requestbuffers *p = arg;
 439
 440         pr_cont("count=%d, type=%s, memory=%s\n",
 441                 p->count,
 442                 prt_names(p->type, v4l2_type_names),
 443                 prt_names(p->memory, v4l2_memory_names));
 444 }
 445
 446 static void v4l_print_buffer(const void *arg, bool write_only)
 447 {
 448         const struct v4l2_buffer *p = arg;
 449         const struct v4l2_timecode *tc = &p->timecode;
 450         const struct v4l2_plane *plane;
 451         int i;
 452
 453         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 454                         (int)p->timestamp.tv_sec / 3600,
 455                         ((int)p->timestamp.tv_sec / 60) % 60,
 456                         ((int)p->timestamp.tv_sec % 60),
 457                         (long)p->timestamp.tv_usec,
 458                         p->index,
 459                         prt_names(p->type, v4l2_type_names), p->request_fd,
 460                         p->flags, prt_names(p->field, v4l2_field_names),
 461                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 462
 463         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 464                 pr_cont("\n");
 465                 for (i = 0; i < p->length; ++i) {
 466                         plane = &p->m.planes[i];
 467                         printk(KERN_DEBUG
 468                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 469                                 i, plane->bytesused, plane->data_offset,
 470                                 plane->m.userptr, plane->length);
 471                 }
 472         } else {
 473                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 474                         p->bytesused, p->m.userptr, p->length);
 475         }
 476
 477         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 478                         tc->hours, tc->minutes, tc->seconds,
 479                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 480 }
 481
 482 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 483 {
 484         const struct v4l2_exportbuffer *p = arg;
 485
 486         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 487                 p->fd, prt_names(p->type, v4l2_type_names),
 488                 p->index, p->plane, p->flags);
 489 }
 490
 491 static void v4l_print_create_buffers(const void *arg, bool write_only)
 492 {
 493         const struct v4l2_create_buffers *p = arg;
 494
 495         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 496                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 497                 p->capabilities);
 498         v4l_print_format(&p->format, write_only);
 499 }
 500
 501 static void v4l_print_streamparm(const void *arg, bool write_only)
 502 {
 503         const struct v4l2_streamparm *p = arg;
 504
 505         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 506
 507         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 508             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 509                 const struct v4l2_captureparm *c = &p->parm.capture;
 510
 511                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 512                         c->capability, c->capturemode,
 513                         c->timeperframe.numerator, c->timeperframe.denominator,
 514                         c->extendedmode, c->readbuffers);
 515         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 516                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 517                 const struct v4l2_outputparm *c = &p->parm.output;
 518
 519                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 520                         c->capability, c->outputmode,
 521                         c->timeperframe.numerator, c->timeperframe.denominator,
 522                         c->extendedmode, c->writebuffers);
 523         } else {
 524                 pr_cont("\n");
 525         }
 526 }
 527
 528 static void v4l_print_queryctrl(const void *arg, bool write_only)
 529 {
 530         const struct v4l2_queryctrl *p = arg;
 531
 532         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 533                         p->id, p->type, (int)sizeof(p->name), p->name,
 534                         p->minimum, p->maximum,
 535                         p->step, p->default_value, p->flags);
 536 }
 537
 538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 539 {
 540         const struct v4l2_query_ext_ctrl *p = arg;
 541
 542         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",
 543                         p->id, p->type, (int)sizeof(p->name), p->name,
 544                         p->minimum, p->maximum,
 545                         p->step, p->default_value, p->flags,
 546                         p->elem_size, p->elems, p->nr_of_dims,
 547                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 548 }
 549
 550 static void v4l_print_querymenu(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_querymenu *p = arg;
 553
 554         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 555 }
 556
 557 static void v4l_print_control(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_control *p = arg;
 560         const char *name = v4l2_ctrl_get_name(p->id);
 561
 562         if (name)
 563                 pr_cont("name=%s, ", name);
 564         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 565 }
 566
 567 static void v4l_print_ext_controls(const void *arg, bool write_only)
 568 {
 569         const struct v4l2_ext_controls *p = arg;
 570         int i;
 571
 572         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 573                         p->which, p->count, p->error_idx, p->request_fd);
 574         for (i = 0; i < p->count; i++) {
 575                 unsigned int id = p->controls[i].id;
 576                 const char *name = v4l2_ctrl_get_name(id);
 577
 578                 if (name)
 579                         pr_cont(", name=%s", name);
 580                 if (!p->controls[i].size)
 581                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 582                 else
 583                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 584         }
 585         pr_cont("\n");
 586 }
 587
 588 static void v4l_print_cropcap(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_cropcap *p = arg;
 591
 592         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 593                 prt_names(p->type, v4l2_type_names),
 594                 p->bounds.width, p->bounds.height,
 595                 p->bounds.left, p->bounds.top,
 596                 p->defrect.width, p->defrect.height,
 597                 p->defrect.left, p->defrect.top,
 598                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 599 }
 600
 601 static void v4l_print_crop(const void *arg, bool write_only)
 602 {
 603         const struct v4l2_crop *p = arg;
 604
 605         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 606                 prt_names(p->type, v4l2_type_names),
 607                 p->c.width, p->c.height,
 608                 p->c.left, p->c.top);
 609 }
 610
 611 static void v4l_print_selection(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_selection *p = arg;
 614
 615         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 616                 prt_names(p->type, v4l2_type_names),
 617                 p->target, p->flags,
 618                 p->r.width, p->r.height, p->r.left, p->r.top);
 619 }
 620
 621 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_jpegcompression *p = arg;
 624
 625         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 626                 p->quality, p->APPn, p->APP_len,
 627                 p->COM_len, p->jpeg_markers);
 628 }
 629
 630 static void v4l_print_enc_idx(const void *arg, bool write_only)
 631 {
 632         const struct v4l2_enc_idx *p = arg;
 633
 634         pr_cont("entries=%d, entries_cap=%d\n",
 635                         p->entries, p->entries_cap);
 636 }
 637
 638 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 639 {
 640         const struct v4l2_encoder_cmd *p = arg;
 641
 642         pr_cont("cmd=%d, flags=0x%x\n",
 643                         p->cmd, p->flags);
 644 }
 645
 646 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 647 {
 648         const struct v4l2_decoder_cmd *p = arg;
 649
 650         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 651
 652         if (p->cmd == V4L2_DEC_CMD_START)
 653                 pr_info("speed=%d, format=%u\n",
 654                                 p->start.speed, p->start.format);
 655         else if (p->cmd == V4L2_DEC_CMD_STOP)
 656                 pr_info("pts=%llu\n", p->stop.pts);
 657 }
 658
 659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 660 {
 661         const struct v4l2_dbg_chip_info *p = arg;
 662
 663         pr_cont("type=%u, ", p->match.type);
 664         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 665                 pr_cont("name=%.*s, ",
 666                                 (int)sizeof(p->match.name), p->match.name);
 667         else
 668                 pr_cont("addr=%u, ", p->match.addr);
 669         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 670 }
 671
 672 static void v4l_print_dbg_register(const void *arg, bool write_only)
 673 {
 674         const struct v4l2_dbg_register *p = arg;
 675
 676         pr_cont("type=%u, ", p->match.type);
 677         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 678                 pr_cont("name=%.*s, ",
 679                                 (int)sizeof(p->match.name), p->match.name);
 680         else
 681                 pr_cont("addr=%u, ", p->match.addr);
 682         pr_cont("reg=0x%llx, val=0x%llx\n",
 683                         p->reg, p->val);
 684 }
 685
 686 static void v4l_print_dv_timings(const void *arg, bool write_only)
 687 {
 688         const struct v4l2_dv_timings *p = arg;
 689
 690         switch (p->type) {
 691         case V4L2_DV_BT_656_1120:
 692                 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",
 693                                 p->bt.interlaced, p->bt.pixelclock,
 694                                 p->bt.width, p->bt.height,
 695                                 p->bt.polarities, p->bt.hfrontporch,
 696                                 p->bt.hsync, p->bt.hbackporch,
 697                                 p->bt.vfrontporch, p->bt.vsync,
 698                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 699                                 p->bt.il_vsync, p->bt.il_vbackporch,
 700                                 p->bt.standards, p->bt.flags);
 701                 break;
 702         default:
 703                 pr_cont("type=%d\n", p->type);
 704                 break;
 705         }
 706 }
 707
 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 709 {
 710         const struct v4l2_enum_dv_timings *p = arg;
 711
 712         pr_cont("index=%u, ", p->index);
 713         v4l_print_dv_timings(&p->timings, write_only);
 714 }
 715
 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 717 {
 718         const struct v4l2_dv_timings_cap *p = arg;
 719
 720         switch (p->type) {
 721         case V4L2_DV_BT_656_1120:
 722                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 723                         p->bt.min_width, p->bt.max_width,
 724                         p->bt.min_height, p->bt.max_height,
 725                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 726                         p->bt.standards, p->bt.capabilities);
 727                 break;
 728         default:
 729                 pr_cont("type=%u\n", p->type);
 730                 break;
 731         }
 732 }
 733
 734 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_frmsizeenum *p = arg;
 737
 738         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 739                 p->index, &p->pixel_format, p->type);
 740         switch (p->type) {
 741         case V4L2_FRMSIZE_TYPE_DISCRETE:
 742                 pr_cont(", wxh=%ux%u\n",
 743                         p->discrete.width, p->discrete.height);
 744                 break;
 745         case V4L2_FRMSIZE_TYPE_STEPWISE:
 746                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 747                                 p->stepwise.min_width,
 748                                 p->stepwise.min_height,
 749                                 p->stepwise.max_width,
 750                                 p->stepwise.max_height,
 751                                 p->stepwise.step_width,
 752                                 p->stepwise.step_height);
 753                 break;
 754         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 755         default:
 756                 pr_cont("\n");
 757                 break;
 758         }
 759 }
 760
 761 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 762 {
 763         const struct v4l2_frmivalenum *p = arg;
 764
 765         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 766                 p->index, &p->pixel_format, p->width, p->height, p->type);
 767         switch (p->type) {
 768         case V4L2_FRMIVAL_TYPE_DISCRETE:
 769                 pr_cont(", fps=%d/%d\n",
 770                                 p->discrete.numerator,
 771                                 p->discrete.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_STEPWISE:
 774                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 775                                 p->stepwise.min.numerator,
 776                                 p->stepwise.min.denominator,
 777                                 p->stepwise.max.numerator,
 778                                 p->stepwise.max.denominator,
 779                                 p->stepwise.step.numerator,
 780                                 p->stepwise.step.denominator);
 781                 break;
 782         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 783         default:
 784                 pr_cont("\n");
 785                 break;
 786         }
 787 }
 788
 789 static void v4l_print_event(const void *arg, bool write_only)
 790 {
 791         const struct v4l2_event *p = arg;
 792         const struct v4l2_event_ctrl *c;
 793
 794         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 795                         p->type, p->pending, p->sequence, p->id,
 796                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 797         switch (p->type) {
 798         case V4L2_EVENT_VSYNC:
 799                 printk(KERN_DEBUG "field=%s\n",
 800                         prt_names(p->u.vsync.field, v4l2_field_names));
 801                 break;
 802         case V4L2_EVENT_CTRL:
 803                 c = &p->u.ctrl;
 804                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 805                         c->changes, c->type);
 806                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 807                         pr_cont("value64=%lld, ", c->value64);
 808                 else
 809                         pr_cont("value=%d, ", c->value);
 810                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 811                         c->flags, c->minimum, c->maximum,
 812                         c->step, c->default_value);
 813                 break;
 814         case V4L2_EVENT_FRAME_SYNC:
 815                 pr_cont("frame_sequence=%u\n",
 816                         p->u.frame_sync.frame_sequence);
 817                 break;
 818         }
 819 }
 820
 821 static void v4l_print_event_subscription(const void *arg, bool write_only)
 822 {
 823         const struct v4l2_event_subscription *p = arg;
 824
 825         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 826                         p->type, p->id, p->flags);
 827 }
 828
 829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 830 {
 831         const struct v4l2_sliced_vbi_cap *p = arg;
 832         int i;
 833
 834         pr_cont("type=%s, service_set=0x%08x\n",
 835                         prt_names(p->type, v4l2_type_names), p->service_set);
 836         for (i = 0; i < 24; i++)
 837                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 838                                 p->service_lines[0][i],
 839                                 p->service_lines[1][i]);
 840 }
 841
 842 static void v4l_print_freq_band(const void *arg, bool write_only)
 843 {
 844         const struct v4l2_frequency_band *p = arg;
 845
 846         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 847                         p->tuner, p->type, p->index,
 848                         p->capability, p->rangelow,
 849                         p->rangehigh, p->modulation);
 850 }
 851
 852 static void v4l_print_edid(const void *arg, bool write_only)
 853 {
 854         const struct v4l2_edid *p = arg;
 855
 856         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 857                 p->pad, p->start_block, p->blocks);
 858 }
 859
 860 static void v4l_print_u32(const void *arg, bool write_only)
 861 {
 862         pr_cont("value=%u\n", *(const u32 *)arg);
 863 }
 864
 865 static void v4l_print_newline(const void *arg, bool write_only)
 866 {
 867         pr_cont("\n");
 868 }
 869
 870 static void v4l_print_default(const void *arg, bool write_only)
 871 {
 872         pr_cont("driver-specific ioctl\n");
 873 }
 874
 875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 876 {
 877         __u32 i;
 878
 879         /* zero the reserved fields */
 880         c->reserved[0] = 0;
 881         for (i = 0; i < c->count; i++)
 882                 c->controls[i].reserved2[0] = 0;
 883
 884         switch (c->which) {
 885         case V4L2_CID_PRIVATE_BASE:
 886                 /*
 887                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 888                  * when using extended controls.
 889                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 890                  * is it allowed for backwards compatibility.
 891                  */
 892                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 893                         return false;
 894                 break;
 895         case V4L2_CTRL_WHICH_DEF_VAL:
 896                 /* Default value cannot be changed */
 897                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 898                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 899                         c->error_idx = c->count;
 900                         return false;
 901                 }
 902                 return true;
 903         case V4L2_CTRL_WHICH_CUR_VAL:
 904                 return true;
 905         case V4L2_CTRL_WHICH_REQUEST_VAL:
 906                 c->error_idx = c->count;
 907                 return false;
 908         }
 909
 910         /* Check that all controls are from the same control class. */
 911         for (i = 0; i < c->count; i++) {
 912                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 913                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 914                                                                       c->count;
 915                         return false;
 916                 }
 917         }
 918         return true;
 919 }
 920
 921 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 922 {
 923         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 924                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 925                              V4L2_CAP_VIDEO_OUTPUT |
 926                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 927                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 928         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 929                               V4L2_CAP_META_OUTPUT;
 930         struct video_device *vfd = video_devdata(file);
 931         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 932         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 933                       (vfd->device_caps & vid_caps);
 934         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 935         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 936         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 937         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 938                        (vfd->device_caps & meta_caps);
 939         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 940         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 941
 942         if (ops == NULL)
 943                 return -EINVAL;
 944
 945         switch (type) {
 946         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 947                 if ((is_vid || is_tch) && is_rx &&
 948                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 949                         return 0;
 950                 break;
 951         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 952                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 956                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 960                 if (is_vid && is_tx &&
 961                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 962                         return 0;
 963                 break;
 964         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 965                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 969                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_VBI_CAPTURE:
 973                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_VBI_OUTPUT:
 977                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 981                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 982                         return 0;
 983                 break;
 984         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 985                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 986                         return 0;
 987                 break;
 988         case V4L2_BUF_TYPE_SDR_CAPTURE:
 989                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 990                         return 0;
 991                 break;
 992         case V4L2_BUF_TYPE_SDR_OUTPUT:
 993                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 994                         return 0;
 995                 break;
 996         case V4L2_BUF_TYPE_META_CAPTURE:
 997                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 998                         return 0;
 999                 break;
1000         case V4L2_BUF_TYPE_META_OUTPUT:
1001                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1002                         return 0;
1003                 break;
1004         default:
1005                 break;
1006         }
1007         return -EINVAL;
1008 }
1009
1010 static void v4l_sanitize_format(struct v4l2_format *fmt)
1011 {
1012         unsigned int offset;
1013
1014         /* Make sure num_planes is not bogus */
1015         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1016             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1017                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1018                                                VIDEO_MAX_PLANES);
1019
1020         /*
1021          * The v4l2_pix_format structure has been extended with fields that were
1022          * not previously required to be set to zero by applications. The priv
1023          * field, when set to a magic value, indicates the the extended fields
1024          * are valid. Otherwise they will contain undefined values. To simplify
1025          * the API towards drivers zero the extended fields and set the priv
1026          * field to the magic value when the extended pixel format structure
1027          * isn't used by applications.
1028          */
1029
1030         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1031             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1032                 return;
1033
1034         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1035                 return;
1036
1037         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1038
1039         offset = offsetof(struct v4l2_pix_format, priv)
1040                + sizeof(fmt->fmt.pix.priv);
1041         memset(((void *)&fmt->fmt.pix) + offset, 0,
1042                sizeof(fmt->fmt.pix) - offset);
1043 }
1044
1045 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1046                                 struct file *file, void *fh, void *arg)
1047 {
1048         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1049         struct video_device *vfd = video_devdata(file);
1050         int ret;
1051
1052         cap->version = LINUX_VERSION_CODE;
1053         cap->device_caps = vfd->device_caps;
1054         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1055
1056         media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1057                            vfd->dev_parent);
1058
1059         ret = ops->vidioc_querycap(file, fh, cap);
1060
1061         /*
1062          * Drivers must not change device_caps, so check for this and
1063          * warn if this happened.
1064          */
1065         WARN_ON(cap->device_caps != vfd->device_caps);
1066         /*
1067          * Check that capabilities is a superset of
1068          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1069          */
1070         WARN_ON((cap->capabilities &
1071                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1072                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1073         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1074         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1075
1076         return ret;
1077 }
1078
1079 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1080                        struct file *file, void *fh, void *arg)
1081 {
1082         struct video_device *vfd = video_devdata(file);
1083
1084         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1085                 *(int *)arg = 0;
1086                 return 0;
1087         }
1088
1089         return ops->vidioc_g_input(file, fh, arg);
1090 }
1091
1092 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1093                         struct file *file, void *fh, void *arg)
1094 {
1095         struct video_device *vfd = video_devdata(file);
1096
1097         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1098                 *(int *)arg = 0;
1099                 return 0;
1100         }
1101
1102         return ops->vidioc_g_output(file, fh, arg);
1103 }
1104
1105 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1106                                 struct file *file, void *fh, void *arg)
1107 {
1108         struct video_device *vfd = video_devdata(file);
1109         int ret;
1110
1111         ret = v4l_enable_media_source(vfd);
1112         if (ret)
1113                 return ret;
1114
1115         if (vfd->device_caps & V4L2_CAP_IO_MC)
1116                 return  *(int *)arg ? -EINVAL : 0;
1117
1118         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1119 }
1120
1121 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1122                                 struct file *file, void *fh, void *arg)
1123 {
1124         struct video_device *vfd = video_devdata(file);
1125
1126         if (vfd->device_caps & V4L2_CAP_IO_MC)
1127                 return  *(int *)arg ? -EINVAL : 0;
1128
1129         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1130 }
1131
1132 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1133                                 struct file *file, void *fh, void *arg)
1134 {
1135         struct video_device *vfd;
1136         u32 *p = arg;
1137
1138         vfd = video_devdata(file);
1139         *p = v4l2_prio_max(vfd->prio);
1140         return 0;
1141 }
1142
1143 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1144                                 struct file *file, void *fh, void *arg)
1145 {
1146         struct video_device *vfd;
1147         struct v4l2_fh *vfh;
1148         u32 *p = arg;
1149
1150         vfd = video_devdata(file);
1151         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1152                 return -ENOTTY;
1153         vfh = file->private_data;
1154         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1155 }
1156
1157 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1158                                 struct file *file, void *fh, void *arg)
1159 {
1160         struct video_device *vfd = video_devdata(file);
1161         struct v4l2_input *p = arg;
1162
1163         /*
1164          * We set the flags for CAP_DV_TIMINGS &
1165          * CAP_STD here based on ioctl handler provided by the
1166          * driver. If the driver doesn't support these
1167          * for a specific input, it must override these flags.
1168          */
1169         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1170                 p->capabilities |= V4L2_IN_CAP_STD;
1171
1172         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1173                 if (p->index)
1174                         return -EINVAL;
1175                 strscpy(p->name, vfd->name, sizeof(p->name));
1176                 p->type = V4L2_INPUT_TYPE_CAMERA;
1177                 return 0;
1178         }
1179
1180         return ops->vidioc_enum_input(file, fh, p);
1181 }
1182
1183 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1184                                 struct file *file, void *fh, void *arg)
1185 {
1186         struct video_device *vfd = video_devdata(file);
1187         struct v4l2_output *p = arg;
1188
1189         /*
1190          * We set the flags for CAP_DV_TIMINGS &
1191          * CAP_STD here based on ioctl handler provided by the
1192          * driver. If the driver doesn't support these
1193          * for a specific output, it must override these flags.
1194          */
1195         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1196                 p->capabilities |= V4L2_OUT_CAP_STD;
1197
1198         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1199                 if (p->index)
1200                         return -EINVAL;
1201                 strscpy(p->name, vfd->name, sizeof(p->name));
1202                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1203                 return 0;
1204         }
1205
1206         return ops->vidioc_enum_output(file, fh, p);
1207 }
1208
1209 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1210 {
1211         const unsigned sz = sizeof(fmt->description);
1212         const char *descr = NULL;
1213         u32 flags = 0;
1214
1215         /*
1216          * We depart from the normal coding style here since the descriptions
1217          * should be aligned so it is easy to see which descriptions will be
1218          * longer than 31 characters (the max length for a description).
1219          * And frankly, this is easier to read anyway.
1220          *
1221          * Note that gcc will use O(log N) comparisons to find the right case.
1222          */
1223         switch (fmt->pixelformat) {
1224         /* Max description length mask: descr = "0123456789012345678901234567890" */
1225         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1226         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1227         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1228         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1229         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1230         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1231         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1232         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1233         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1234         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1235         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1236         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1237         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1238         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1239         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1240         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1241         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1242         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1243         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1244         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1245         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1246         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1247         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1248         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1249         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1250         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1251         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1252         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1253         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1254         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1255         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1256         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1257         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1258         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1259         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1260         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1261         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1262         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1263         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1264         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1265         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1266         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1267         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1268         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1269         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1270         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1271         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1272         case V4L2_PIX_FMT_IPU3_Y10:     descr = "10-bit greyscale (IPU3 Packed)"; break;
1273         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1274         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1275         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1276         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1277         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1278         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1279         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1280         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1281         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1282         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1283         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1284         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1285         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1286         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1287         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1288         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1289         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1290         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1291         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1292         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1293         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1294         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1295         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1296         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1297         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1298         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1299         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1300         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1301         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1302         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1303         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1304         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1305         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1306         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1307         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1308         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1309         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/CbCr 4:2:0 (4x4 Linear)"; break;
1310         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/CbCr 4:2:0 (16x16 Linear)"; break;
1311         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/CbCr 4:2:0 (32x32 Linear)"; break;
1312         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1313         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1314         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1315         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1316         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1317         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1318         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1319         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1320         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1321         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1322         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1323         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1324         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1325         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1326         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1327         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1328         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1329         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1330         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1331         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1332         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1333         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1334         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1335         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1336         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1337         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1338         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1339         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1340         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1341         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1342         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1343         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1344         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1345         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1346         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1347         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1348         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1349         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1350         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1351         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1352         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1353         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1354         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1355         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1356         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1357         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1358         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1359         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1360         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1361         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1362         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1363         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1364         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1365         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1366         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1367         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1368         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1369         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1370         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1371         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1372         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1373         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1374         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1375         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1376         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1377         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1378         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1379         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1380         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1381         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1382         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1383         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1384         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1385         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1386         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1387         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1388         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1389         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1390         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1391         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1392         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1393         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1394         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1395         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1396         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1397         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1398         case V4L2_PIX_FMT_NV12M_8L128:  descr = "NV12M (8x128 Linear)"; break;
1399         case V4L2_PIX_FMT_NV12M_10BE_8L128:     descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1400
1401         default:
1402                 /* Compressed formats */
1403                 flags = V4L2_FMT_FLAG_COMPRESSED;
1404                 switch (fmt->pixelformat) {
1405                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1406                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1407                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1408                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1409                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1410                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1411                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1412                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1413                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1414                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1415                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1416                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1417                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1418                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1419                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1420                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1421                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1422                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1423                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1424                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1425                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1426                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1427                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1428                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1429                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1430                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1431                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1432                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1433                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1434                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1435                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1436                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1437                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1438                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1439                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1440                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1441                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1442                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1443                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1444                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1445                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1446                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1447                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1448                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1449                 case V4L2_PIX_FMT_QC08C:        descr = "QCOM Compressed 8-bit Format"; break;
1450                 case V4L2_PIX_FMT_QC10C:        descr = "QCOM Compressed 10-bit Format"; break;
1451                 default:
1452                         if (fmt->description[0])
1453                                 return;
1454                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1455                         flags = 0;
1456                         snprintf(fmt->description, sz, "%p4cc",
1457                                  &fmt->pixelformat);
1458                         break;
1459                 }
1460         }
1461
1462         if (descr)
1463                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1464         fmt->flags |= flags;
1465 }
1466
1467 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1468                                 struct file *file, void *fh, void *arg)
1469 {
1470         struct video_device *vdev = video_devdata(file);
1471         struct v4l2_fmtdesc *p = arg;
1472         int ret = check_fmt(file, p->type);
1473         u32 mbus_code;
1474         u32 cap_mask;
1475
1476         if (ret)
1477                 return ret;
1478         ret = -EINVAL;
1479
1480         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1481                 p->mbus_code = 0;
1482
1483         mbus_code = p->mbus_code;
1484         CLEAR_AFTER_FIELD(p, type);
1485         p->mbus_code = mbus_code;
1486
1487         switch (p->type) {
1488         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1489         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1490                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1491                            V4L2_CAP_VIDEO_M2M_MPLANE;
1492                 if (!!(vdev->device_caps & cap_mask) !=
1493                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1494                         break;
1495
1496                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1497                         break;
1498                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1499                 break;
1500         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1501                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1502                         break;
1503                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1504                 break;
1505         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1506         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1507                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1508                            V4L2_CAP_VIDEO_M2M_MPLANE;
1509                 if (!!(vdev->device_caps & cap_mask) !=
1510                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1511                         break;
1512
1513                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1514                         break;
1515                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1516                 break;
1517         case V4L2_BUF_TYPE_SDR_CAPTURE:
1518                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1519                         break;
1520                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1521                 break;
1522         case V4L2_BUF_TYPE_SDR_OUTPUT:
1523                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1524                         break;
1525                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1526                 break;
1527         case V4L2_BUF_TYPE_META_CAPTURE:
1528                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1529                         break;
1530                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1531                 break;
1532         case V4L2_BUF_TYPE_META_OUTPUT:
1533                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1534                         break;
1535                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1536                 break;
1537         }
1538         if (ret == 0)
1539                 v4l_fill_fmtdesc(p);
1540         return ret;
1541 }
1542
1543 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1544 {
1545         /*
1546          * The v4l2_pix_format structure contains fields that make no sense for
1547          * touch. Set them to default values in this case.
1548          */
1549
1550         p->field = V4L2_FIELD_NONE;
1551         p->colorspace = V4L2_COLORSPACE_RAW;
1552         p->flags = 0;
1553         p->ycbcr_enc = 0;
1554         p->quantization = 0;
1555         p->xfer_func = 0;
1556 }
1557
1558 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1559                                 struct file *file, void *fh, void *arg)
1560 {
1561         struct v4l2_format *p = arg;
1562         struct video_device *vfd = video_devdata(file);
1563         int ret = check_fmt(file, p->type);
1564
1565         if (ret)
1566                 return ret;
1567
1568         /*
1569          * fmt can't be cleared for these overlay types due to the 'clips'
1570          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1571          * Those are provided by the user. So handle these two overlay types
1572          * first, and then just do a simple memset for the other types.
1573          */
1574         switch (p->type) {
1575         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1576         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1577                 struct v4l2_clip *clips = p->fmt.win.clips;
1578                 u32 clipcount = p->fmt.win.clipcount;
1579                 void __user *bitmap = p->fmt.win.bitmap;
1580
1581                 memset(&p->fmt, 0, sizeof(p->fmt));
1582                 p->fmt.win.clips = clips;
1583                 p->fmt.win.clipcount = clipcount;
1584                 p->fmt.win.bitmap = bitmap;
1585                 break;
1586         }
1587         default:
1588                 memset(&p->fmt, 0, sizeof(p->fmt));
1589                 break;
1590         }
1591
1592         switch (p->type) {
1593         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1594                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1595                         break;
1596                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1597                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1598                 /* just in case the driver zeroed it again */
1599                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1600                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1601                         v4l_pix_format_touch(&p->fmt.pix);
1602                 return ret;
1603         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1604                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1605         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1606                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1607         case V4L2_BUF_TYPE_VBI_CAPTURE:
1608                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1609         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1610                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1611         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1612                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1613                         break;
1614                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1615                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1616                 /* just in case the driver zeroed it again */
1617                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1618                 return ret;
1619         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1620                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1621         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1622                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1623         case V4L2_BUF_TYPE_VBI_OUTPUT:
1624                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1625         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1626                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1627         case V4L2_BUF_TYPE_SDR_CAPTURE:
1628                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1629         case V4L2_BUF_TYPE_SDR_OUTPUT:
1630                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1631         case V4L2_BUF_TYPE_META_CAPTURE:
1632                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1633         case V4L2_BUF_TYPE_META_OUTPUT:
1634                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1635         }
1636         return -EINVAL;
1637 }
1638
1639 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1640                                 struct file *file, void *fh, void *arg)
1641 {
1642         struct v4l2_format *p = arg;
1643         struct video_device *vfd = video_devdata(file);
1644         int ret = check_fmt(file, p->type);
1645         unsigned int i;
1646
1647         if (ret)
1648                 return ret;
1649
1650         ret = v4l_enable_media_source(vfd);
1651         if (ret)
1652                 return ret;
1653         v4l_sanitize_format(p);
1654
1655         switch (p->type) {
1656         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1657                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1658                         break;
1659                 CLEAR_AFTER_FIELD(p, fmt.pix);
1660                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1661                 /* just in case the driver zeroed it again */
1662                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1663                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1664                         v4l_pix_format_touch(&p->fmt.pix);
1665                 return ret;
1666         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1667                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1668                         break;
1669                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1670                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1671                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1672                                           bytesperline);
1673                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1674         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1675                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1676                         break;
1677                 CLEAR_AFTER_FIELD(p, fmt.win);
1678                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1679         case V4L2_BUF_TYPE_VBI_CAPTURE:
1680                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1681                         break;
1682                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1683                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1684         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1685                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1686                         break;
1687                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1688                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1689         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1690                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1691                         break;
1692                 CLEAR_AFTER_FIELD(p, fmt.pix);
1693                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1694                 /* just in case the driver zeroed it again */
1695                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1696                 return ret;
1697         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1698                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1699                         break;
1700                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1701                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1702                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1703                                           bytesperline);
1704                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1705         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1706                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1707                         break;
1708                 CLEAR_AFTER_FIELD(p, fmt.win);
1709                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1710         case V4L2_BUF_TYPE_VBI_OUTPUT:
1711                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1712                         break;
1713                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1714                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1715         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1716                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1717                         break;
1718                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1719                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1720         case V4L2_BUF_TYPE_SDR_CAPTURE:
1721                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1722                         break;
1723                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1724                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1725         case V4L2_BUF_TYPE_SDR_OUTPUT:
1726                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1727                         break;
1728                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1729                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1730         case V4L2_BUF_TYPE_META_CAPTURE:
1731                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1732                         break;
1733                 CLEAR_AFTER_FIELD(p, fmt.meta);
1734                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1735         case V4L2_BUF_TYPE_META_OUTPUT:
1736                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1737                         break;
1738                 CLEAR_AFTER_FIELD(p, fmt.meta);
1739                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1740         }
1741         return -EINVAL;
1742 }
1743
1744 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1745                                 struct file *file, void *fh, void *arg)
1746 {
1747         struct v4l2_format *p = arg;
1748         struct video_device *vfd = video_devdata(file);
1749         int ret = check_fmt(file, p->type);
1750         unsigned int i;
1751
1752         if (ret)
1753                 return ret;
1754
1755         v4l_sanitize_format(p);
1756
1757         switch (p->type) {
1758         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1759                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1760                         break;
1761                 CLEAR_AFTER_FIELD(p, fmt.pix);
1762                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1763                 /* just in case the driver zeroed it again */
1764                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1765                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1766                         v4l_pix_format_touch(&p->fmt.pix);
1767                 return ret;
1768         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1769                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1770                         break;
1771                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1772                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1773                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1774                                           bytesperline);
1775                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1776         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1777                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1778                         break;
1779                 CLEAR_AFTER_FIELD(p, fmt.win);
1780                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1781         case V4L2_BUF_TYPE_VBI_CAPTURE:
1782                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1783                         break;
1784                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1785                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1786         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1787                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1788                         break;
1789                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1790                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1791         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1792                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1793                         break;
1794                 CLEAR_AFTER_FIELD(p, fmt.pix);
1795                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1796                 /* just in case the driver zeroed it again */
1797                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1798                 return ret;
1799         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1800                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1801                         break;
1802                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1803                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1804                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1805                                           bytesperline);
1806                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1807         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1808                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1809                         break;
1810                 CLEAR_AFTER_FIELD(p, fmt.win);
1811                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1812         case V4L2_BUF_TYPE_VBI_OUTPUT:
1813                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1814                         break;
1815                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1816                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1817         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1818                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1819                         break;
1820                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1821                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1822         case V4L2_BUF_TYPE_SDR_CAPTURE:
1823                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1824                         break;
1825                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1826                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1827         case V4L2_BUF_TYPE_SDR_OUTPUT:
1828                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1829                         break;
1830                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1831                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1832         case V4L2_BUF_TYPE_META_CAPTURE:
1833                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1834                         break;
1835                 CLEAR_AFTER_FIELD(p, fmt.meta);
1836                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1837         case V4L2_BUF_TYPE_META_OUTPUT:
1838                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1839                         break;
1840                 CLEAR_AFTER_FIELD(p, fmt.meta);
1841                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1842         }
1843         return -EINVAL;
1844 }
1845
1846 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1847                                 struct file *file, void *fh, void *arg)
1848 {
1849         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1850 }
1851
1852 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1853                                 struct file *file, void *fh, void *arg)
1854 {
1855         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1856 }
1857
1858 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1859                                 struct file *file, void *fh, void *arg)
1860 {
1861         struct video_device *vfd = video_devdata(file);
1862         struct v4l2_tuner *p = arg;
1863         int err;
1864
1865         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1866                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1867         err = ops->vidioc_g_tuner(file, fh, p);
1868         if (!err)
1869                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1870         return err;
1871 }
1872
1873 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1874                                 struct file *file, void *fh, void *arg)
1875 {
1876         struct video_device *vfd = video_devdata(file);
1877         struct v4l2_tuner *p = arg;
1878         int ret;
1879
1880         ret = v4l_enable_media_source(vfd);
1881         if (ret)
1882                 return ret;
1883         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1884                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1885         return ops->vidioc_s_tuner(file, fh, p);
1886 }
1887
1888 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1889                                 struct file *file, void *fh, void *arg)
1890 {
1891         struct video_device *vfd = video_devdata(file);
1892         struct v4l2_modulator *p = arg;
1893         int err;
1894
1895         if (vfd->vfl_type == VFL_TYPE_RADIO)
1896                 p->type = V4L2_TUNER_RADIO;
1897
1898         err = ops->vidioc_g_modulator(file, fh, p);
1899         if (!err)
1900                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1901         return err;
1902 }
1903
1904 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1905                                 struct file *file, void *fh, void *arg)
1906 {
1907         struct video_device *vfd = video_devdata(file);
1908         struct v4l2_modulator *p = arg;
1909
1910         if (vfd->vfl_type == VFL_TYPE_RADIO)
1911                 p->type = V4L2_TUNER_RADIO;
1912
1913         return ops->vidioc_s_modulator(file, fh, p);
1914 }
1915
1916 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1917                                 struct file *file, void *fh, void *arg)
1918 {
1919         struct video_device *vfd = video_devdata(file);
1920         struct v4l2_frequency *p = arg;
1921
1922         if (vfd->vfl_type == VFL_TYPE_SDR)
1923                 p->type = V4L2_TUNER_SDR;
1924         else
1925                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1926                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1927         return ops->vidioc_g_frequency(file, fh, p);
1928 }
1929
1930 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1931                                 struct file *file, void *fh, void *arg)
1932 {
1933         struct video_device *vfd = video_devdata(file);
1934         const struct v4l2_frequency *p = arg;
1935         enum v4l2_tuner_type type;
1936         int ret;
1937
1938         ret = v4l_enable_media_source(vfd);
1939         if (ret)
1940                 return ret;
1941         if (vfd->vfl_type == VFL_TYPE_SDR) {
1942                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1943                         return -EINVAL;
1944         } else {
1945                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1946                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1947                 if (type != p->type)
1948                         return -EINVAL;
1949         }
1950         return ops->vidioc_s_frequency(file, fh, p);
1951 }
1952
1953 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1954                                 struct file *file, void *fh, void *arg)
1955 {
1956         struct video_device *vfd = video_devdata(file);
1957         struct v4l2_standard *p = arg;
1958
1959         return v4l_video_std_enumstd(p, vfd->tvnorms);
1960 }
1961
1962 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1963                                 struct file *file, void *fh, void *arg)
1964 {
1965         struct video_device *vfd = video_devdata(file);
1966         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1967         int ret;
1968
1969         ret = v4l_enable_media_source(vfd);
1970         if (ret)
1971                 return ret;
1972         norm = id & vfd->tvnorms;
1973         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1974                 return -EINVAL;
1975
1976         /* Calls the specific handler */
1977         return ops->vidioc_s_std(file, fh, norm);
1978 }
1979
1980 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1981                                 struct file *file, void *fh, void *arg)
1982 {
1983         struct video_device *vfd = video_devdata(file);
1984         v4l2_std_id *p = arg;
1985         int ret;
1986
1987         ret = v4l_enable_media_source(vfd);
1988         if (ret)
1989                 return ret;
1990         /*
1991          * If no signal is detected, then the driver should return
1992          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1993          * any standards that do not apply removed.
1994          *
1995          * This means that tuners, audio and video decoders can join
1996          * their efforts to improve the standards detection.
1997          */
1998         *p = vfd->tvnorms;
1999         return ops->vidioc_querystd(file, fh, arg);
2000 }
2001
2002 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2003                                 struct file *file, void *fh, void *arg)
2004 {
2005         struct video_device *vfd = video_devdata(file);
2006         struct v4l2_hw_freq_seek *p = arg;
2007         enum v4l2_tuner_type type;
2008         int ret;
2009
2010         ret = v4l_enable_media_source(vfd);
2011         if (ret)
2012                 return ret;
2013         /* s_hw_freq_seek is not supported for SDR for now */
2014         if (vfd->vfl_type == VFL_TYPE_SDR)
2015                 return -EINVAL;
2016
2017         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2018                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2019         if (p->type != type)
2020                 return -EINVAL;
2021         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2022 }
2023
2024 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2025                                 struct file *file, void *fh, void *arg)
2026 {
2027         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2028 }
2029
2030 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2031                                 struct file *file, void *fh, void *arg)
2032 {
2033         struct v4l2_requestbuffers *p = arg;
2034         int ret = check_fmt(file, p->type);
2035
2036         if (ret)
2037                 return ret;
2038
2039         CLEAR_AFTER_FIELD(p, flags);
2040
2041         return ops->vidioc_reqbufs(file, fh, p);
2042 }
2043
2044 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2045                                 struct file *file, void *fh, void *arg)
2046 {
2047         struct v4l2_buffer *p = arg;
2048         int ret = check_fmt(file, p->type);
2049
2050         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2051 }
2052
2053 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2054                                 struct file *file, void *fh, void *arg)
2055 {
2056         struct v4l2_buffer *p = arg;
2057         int ret = check_fmt(file, p->type);
2058
2059         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2060 }
2061
2062 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2063                                 struct file *file, void *fh, void *arg)
2064 {
2065         struct v4l2_buffer *p = arg;
2066         int ret = check_fmt(file, p->type);
2067
2068         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2069 }
2070
2071 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2072                                 struct file *file, void *fh, void *arg)
2073 {
2074         struct v4l2_create_buffers *create = arg;
2075         int ret = check_fmt(file, create->format.type);
2076
2077         if (ret)
2078                 return ret;
2079
2080         CLEAR_AFTER_FIELD(create, flags);
2081
2082         v4l_sanitize_format(&create->format);
2083
2084         ret = ops->vidioc_create_bufs(file, fh, create);
2085
2086         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2087             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2088                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2089
2090         return ret;
2091 }
2092
2093 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2094                                 struct file *file, void *fh, void *arg)
2095 {
2096         struct v4l2_buffer *b = arg;
2097         int ret = check_fmt(file, b->type);
2098
2099         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2100 }
2101
2102 static int v4l_g_parm(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_streamparm *p = arg;
2107         v4l2_std_id std;
2108         int ret = check_fmt(file, p->type);
2109
2110         if (ret)
2111                 return ret;
2112         if (ops->vidioc_g_parm)
2113                 return ops->vidioc_g_parm(file, fh, p);
2114         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2115             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2116                 return -EINVAL;
2117         if (vfd->device_caps & V4L2_CAP_READWRITE)
2118                 p->parm.capture.readbuffers = 2;
2119         ret = ops->vidioc_g_std(file, fh, &std);
2120         if (ret == 0)
2121                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2122         return ret;
2123 }
2124
2125 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2126                                 struct file *file, void *fh, void *arg)
2127 {
2128         struct v4l2_streamparm *p = arg;
2129         int ret = check_fmt(file, p->type);
2130
2131         if (ret)
2132                 return ret;
2133
2134         /* Note: extendedmode is never used in drivers */
2135         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2136                 memset(p->parm.output.reserved, 0,
2137                        sizeof(p->parm.output.reserved));
2138                 p->parm.output.extendedmode = 0;
2139                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2140         } else {
2141                 memset(p->parm.capture.reserved, 0,
2142                        sizeof(p->parm.capture.reserved));
2143                 p->parm.capture.extendedmode = 0;
2144                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2145         }
2146         return ops->vidioc_s_parm(file, fh, p);
2147 }
2148
2149 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2150                                 struct file *file, void *fh, void *arg)
2151 {
2152         struct video_device *vfd = video_devdata(file);
2153         struct v4l2_queryctrl *p = arg;
2154         struct v4l2_fh *vfh =
2155                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2156
2157         if (vfh && vfh->ctrl_handler)
2158                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2159         if (vfd->ctrl_handler)
2160                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2161         if (ops->vidioc_queryctrl)
2162                 return ops->vidioc_queryctrl(file, fh, p);
2163         return -ENOTTY;
2164 }
2165
2166 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2167                                 struct file *file, void *fh, void *arg)
2168 {
2169         struct video_device *vfd = video_devdata(file);
2170         struct v4l2_query_ext_ctrl *p = arg;
2171         struct v4l2_fh *vfh =
2172                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2173
2174         if (vfh && vfh->ctrl_handler)
2175                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2176         if (vfd->ctrl_handler)
2177                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2178         if (ops->vidioc_query_ext_ctrl)
2179                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2180         return -ENOTTY;
2181 }
2182
2183 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2184                                 struct file *file, void *fh, void *arg)
2185 {
2186         struct video_device *vfd = video_devdata(file);
2187         struct v4l2_querymenu *p = arg;
2188         struct v4l2_fh *vfh =
2189                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2190
2191         if (vfh && vfh->ctrl_handler)
2192                 return v4l2_querymenu(vfh->ctrl_handler, p);
2193         if (vfd->ctrl_handler)
2194                 return v4l2_querymenu(vfd->ctrl_handler, p);
2195         if (ops->vidioc_querymenu)
2196                 return ops->vidioc_querymenu(file, fh, p);
2197         return -ENOTTY;
2198 }
2199
2200 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2201                                 struct file *file, void *fh, void *arg)
2202 {
2203         struct video_device *vfd = video_devdata(file);
2204         struct v4l2_control *p = arg;
2205         struct v4l2_fh *vfh =
2206                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2207         struct v4l2_ext_controls ctrls;
2208         struct v4l2_ext_control ctrl;
2209
2210         if (vfh && vfh->ctrl_handler)
2211                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2212         if (vfd->ctrl_handler)
2213                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2214         if (ops->vidioc_g_ctrl)
2215                 return ops->vidioc_g_ctrl(file, fh, p);
2216         if (ops->vidioc_g_ext_ctrls == NULL)
2217                 return -ENOTTY;
2218
2219         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2220         ctrls.count = 1;
2221         ctrls.controls = &ctrl;
2222         ctrl.id = p->id;
2223         ctrl.value = p->value;
2224         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2225                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2226
2227                 if (ret == 0)
2228                         p->value = ctrl.value;
2229                 return ret;
2230         }
2231         return -EINVAL;
2232 }
2233
2234 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2235                                 struct file *file, void *fh, void *arg)
2236 {
2237         struct video_device *vfd = video_devdata(file);
2238         struct v4l2_control *p = arg;
2239         struct v4l2_fh *vfh =
2240                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2241         struct v4l2_ext_controls ctrls;
2242         struct v4l2_ext_control ctrl;
2243         int ret;
2244
2245         if (vfh && vfh->ctrl_handler)
2246                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2247         if (vfd->ctrl_handler)
2248                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2249         if (ops->vidioc_s_ctrl)
2250                 return ops->vidioc_s_ctrl(file, fh, p);
2251         if (ops->vidioc_s_ext_ctrls == NULL)
2252                 return -ENOTTY;
2253
2254         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2255         ctrls.count = 1;
2256         ctrls.controls = &ctrl;
2257         ctrl.id = p->id;
2258         ctrl.value = p->value;
2259         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2260                 return -EINVAL;
2261         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2262         p->value = ctrl.value;
2263         return ret;
2264 }
2265
2266 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2267                                 struct file *file, void *fh, void *arg)
2268 {
2269         struct video_device *vfd = video_devdata(file);
2270         struct v4l2_ext_controls *p = arg;
2271         struct v4l2_fh *vfh =
2272                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2273
2274         p->error_idx = p->count;
2275         if (vfh && vfh->ctrl_handler)
2276                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2277                                         vfd, vfd->v4l2_dev->mdev, p);
2278         if (vfd->ctrl_handler)
2279                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2280                                         vfd, vfd->v4l2_dev->mdev, p);
2281         if (ops->vidioc_g_ext_ctrls == NULL)
2282                 return -ENOTTY;
2283         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2284                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2285 }
2286
2287 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2288                                 struct file *file, void *fh, void *arg)
2289 {
2290         struct video_device *vfd = video_devdata(file);
2291         struct v4l2_ext_controls *p = arg;
2292         struct v4l2_fh *vfh =
2293                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2294
2295         p->error_idx = p->count;
2296         if (vfh && vfh->ctrl_handler)
2297                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2298                                         vfd, vfd->v4l2_dev->mdev, p);
2299         if (vfd->ctrl_handler)
2300                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2301                                         vfd, vfd->v4l2_dev->mdev, p);
2302         if (ops->vidioc_s_ext_ctrls == NULL)
2303                 return -ENOTTY;
2304         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2305                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2306 }
2307
2308 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2309                                 struct file *file, void *fh, void *arg)
2310 {
2311         struct video_device *vfd = video_devdata(file);
2312         struct v4l2_ext_controls *p = arg;
2313         struct v4l2_fh *vfh =
2314                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2315
2316         p->error_idx = p->count;
2317         if (vfh && vfh->ctrl_handler)
2318                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2319                                           vfd, vfd->v4l2_dev->mdev, p);
2320         if (vfd->ctrl_handler)
2321                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2322                                           vfd, vfd->v4l2_dev->mdev, p);
2323         if (ops->vidioc_try_ext_ctrls == NULL)
2324                 return -ENOTTY;
2325         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2326                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2327 }
2328
2329 /*
2330  * The selection API specified originally that the _MPLANE buffer types
2331  * shouldn't be used. The reasons for this are lost in the mists of time
2332  * (or just really crappy memories). Regardless, this is really annoying
2333  * for userspace. So to keep things simple we map _MPLANE buffer types
2334  * to their 'regular' counterparts before calling the driver. And we
2335  * restore it afterwards. This way applications can use either buffer
2336  * type and drivers don't need to check for both.
2337  */
2338 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2339                            struct file *file, void *fh, void *arg)
2340 {
2341         struct v4l2_selection *p = arg;
2342         u32 old_type = p->type;
2343         int ret;
2344
2345         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2346                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2347         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2348                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2349         ret = ops->vidioc_g_selection(file, fh, p);
2350         p->type = old_type;
2351         return ret;
2352 }
2353
2354 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2355                            struct file *file, void *fh, void *arg)
2356 {
2357         struct v4l2_selection *p = arg;
2358         u32 old_type = p->type;
2359         int ret;
2360
2361         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2362                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2363         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2364                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2365         ret = ops->vidioc_s_selection(file, fh, p);
2366         p->type = old_type;
2367         return ret;
2368 }
2369
2370 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2371                                 struct file *file, void *fh, void *arg)
2372 {
2373         struct video_device *vfd = video_devdata(file);
2374         struct v4l2_crop *p = arg;
2375         struct v4l2_selection s = {
2376                 .type = p->type,
2377         };
2378         int ret;
2379
2380         /* simulate capture crop using selection api */
2381
2382         /* crop means compose for output devices */
2383         if (V4L2_TYPE_IS_OUTPUT(p->type))
2384                 s.target = V4L2_SEL_TGT_COMPOSE;
2385         else
2386                 s.target = V4L2_SEL_TGT_CROP;
2387
2388         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2389                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2390                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2391
2392         ret = v4l_g_selection(ops, file, fh, &s);
2393
2394         /* copying results to old structure on success */
2395         if (!ret)
2396                 p->c = s.r;
2397         return ret;
2398 }
2399
2400 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2401                                 struct file *file, void *fh, void *arg)
2402 {
2403         struct video_device *vfd = video_devdata(file);
2404         struct v4l2_crop *p = arg;
2405         struct v4l2_selection s = {
2406                 .type = p->type,
2407                 .r = p->c,
2408         };
2409
2410         /* simulate capture crop using selection api */
2411
2412         /* crop means compose for output devices */
2413         if (V4L2_TYPE_IS_OUTPUT(p->type))
2414                 s.target = V4L2_SEL_TGT_COMPOSE;
2415         else
2416                 s.target = V4L2_SEL_TGT_CROP;
2417
2418         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2419                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2420                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2421
2422         return v4l_s_selection(ops, file, fh, &s);
2423 }
2424
2425 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2426                                 struct file *file, void *fh, void *arg)
2427 {
2428         struct video_device *vfd = video_devdata(file);
2429         struct v4l2_cropcap *p = arg;
2430         struct v4l2_selection s = { .type = p->type };
2431         int ret = 0;
2432
2433         /* setting trivial pixelaspect */
2434         p->pixelaspect.numerator = 1;
2435         p->pixelaspect.denominator = 1;
2436
2437         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2438                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2439         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2440                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2441
2442         /*
2443          * The determine_valid_ioctls() call already should ensure
2444          * that this can never happen, but just in case...
2445          */
2446         if (WARN_ON(!ops->vidioc_g_selection))
2447                 return -ENOTTY;
2448
2449         if (ops->vidioc_g_pixelaspect)
2450                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2451                                                 &p->pixelaspect);
2452
2453         /*
2454          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2455          * square pixel aspect ratio in that case.
2456          */
2457         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2458                 return ret;
2459
2460         /* Use g_selection() to fill in the bounds and defrect rectangles */
2461
2462         /* obtaining bounds */
2463         if (V4L2_TYPE_IS_OUTPUT(p->type))
2464                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2465         else
2466                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2467
2468         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2469                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2470                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2471
2472         ret = v4l_g_selection(ops, file, fh, &s);
2473         if (ret)
2474                 return ret;
2475         p->bounds = s.r;
2476
2477         /* obtaining defrect */
2478         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2479                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2480         else
2481                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2482
2483         ret = v4l_g_selection(ops, file, fh, &s);
2484         if (ret)
2485                 return ret;
2486         p->defrect = s.r;
2487
2488         return 0;
2489 }
2490
2491 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2492                                 struct file *file, void *fh, void *arg)
2493 {
2494         struct video_device *vfd = video_devdata(file);
2495         int ret;
2496
2497         if (vfd->v4l2_dev)
2498                 pr_info("%s: =================  START STATUS  =================\n",
2499                         vfd->v4l2_dev->name);
2500         ret = ops->vidioc_log_status(file, fh);
2501         if (vfd->v4l2_dev)
2502                 pr_info("%s: ==================  END STATUS  ==================\n",
2503                         vfd->v4l2_dev->name);
2504         return ret;
2505 }
2506
2507 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2508                                 struct file *file, void *fh, void *arg)
2509 {
2510 #ifdef CONFIG_VIDEO_ADV_DEBUG
2511         struct v4l2_dbg_register *p = arg;
2512         struct video_device *vfd = video_devdata(file);
2513         struct v4l2_subdev *sd;
2514         int idx = 0;
2515
2516         if (!capable(CAP_SYS_ADMIN))
2517                 return -EPERM;
2518         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2519                 if (vfd->v4l2_dev == NULL)
2520                         return -EINVAL;
2521                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2522                         if (p->match.addr == idx++)
2523                                 return v4l2_subdev_call(sd, core, g_register, p);
2524                 return -EINVAL;
2525         }
2526         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2527             (ops->vidioc_g_chip_info || p->match.addr == 0))
2528                 return ops->vidioc_g_register(file, fh, p);
2529         return -EINVAL;
2530 #else
2531         return -ENOTTY;
2532 #endif
2533 }
2534
2535 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2536                                 struct file *file, void *fh, void *arg)
2537 {
2538 #ifdef CONFIG_VIDEO_ADV_DEBUG
2539         const struct v4l2_dbg_register *p = arg;
2540         struct video_device *vfd = video_devdata(file);
2541         struct v4l2_subdev *sd;
2542         int idx = 0;
2543
2544         if (!capable(CAP_SYS_ADMIN))
2545                 return -EPERM;
2546         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2547                 if (vfd->v4l2_dev == NULL)
2548                         return -EINVAL;
2549                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2550                         if (p->match.addr == idx++)
2551                                 return v4l2_subdev_call(sd, core, s_register, p);
2552                 return -EINVAL;
2553         }
2554         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2555             (ops->vidioc_g_chip_info || p->match.addr == 0))
2556                 return ops->vidioc_s_register(file, fh, p);
2557         return -EINVAL;
2558 #else
2559         return -ENOTTY;
2560 #endif
2561 }
2562
2563 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2564                                 struct file *file, void *fh, void *arg)
2565 {
2566 #ifdef CONFIG_VIDEO_ADV_DEBUG
2567         struct video_device *vfd = video_devdata(file);
2568         struct v4l2_dbg_chip_info *p = arg;
2569         struct v4l2_subdev *sd;
2570         int idx = 0;
2571
2572         switch (p->match.type) {
2573         case V4L2_CHIP_MATCH_BRIDGE:
2574                 if (ops->vidioc_s_register)
2575                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2576                 if (ops->vidioc_g_register)
2577                         p->flags |= V4L2_CHIP_FL_READABLE;
2578                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2579                 if (ops->vidioc_g_chip_info)
2580                         return ops->vidioc_g_chip_info(file, fh, arg);
2581                 if (p->match.addr)
2582                         return -EINVAL;
2583                 return 0;
2584
2585         case V4L2_CHIP_MATCH_SUBDEV:
2586                 if (vfd->v4l2_dev == NULL)
2587                         break;
2588                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2589                         if (p->match.addr != idx++)
2590                                 continue;
2591                         if (sd->ops->core && sd->ops->core->s_register)
2592                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2593                         if (sd->ops->core && sd->ops->core->g_register)
2594                                 p->flags |= V4L2_CHIP_FL_READABLE;
2595                         strscpy(p->name, sd->name, sizeof(p->name));
2596                         return 0;
2597                 }
2598                 break;
2599         }
2600         return -EINVAL;
2601 #else
2602         return -ENOTTY;
2603 #endif
2604 }
2605
2606 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2607                                 struct file *file, void *fh, void *arg)
2608 {
2609         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2610 }
2611
2612 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2613                                 struct file *file, void *fh, void *arg)
2614 {
2615         return ops->vidioc_subscribe_event(fh, arg);
2616 }
2617
2618 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2619                                 struct file *file, void *fh, void *arg)
2620 {
2621         return ops->vidioc_unsubscribe_event(fh, arg);
2622 }
2623
2624 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2625                                 struct file *file, void *fh, void *arg)
2626 {
2627         struct v4l2_sliced_vbi_cap *p = arg;
2628         int ret = check_fmt(file, p->type);
2629
2630         if (ret)
2631                 return ret;
2632
2633         /* Clear up to type, everything after type is zeroed already */
2634         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2635
2636         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2637 }
2638
2639 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2640                                 struct file *file, void *fh, void *arg)
2641 {
2642         struct video_device *vfd = video_devdata(file);
2643         struct v4l2_frequency_band *p = arg;
2644         enum v4l2_tuner_type type;
2645         int err;
2646
2647         if (vfd->vfl_type == VFL_TYPE_SDR) {
2648                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2649                         return -EINVAL;
2650                 type = p->type;
2651         } else {
2652                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2653                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2654                 if (type != p->type)
2655                         return -EINVAL;
2656         }
2657         if (ops->vidioc_enum_freq_bands) {
2658                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2659                 if (err != -ENOTTY)
2660                         return err;
2661         }
2662         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2663                 struct v4l2_tuner t = {
2664                         .index = p->tuner,
2665                         .type = type,
2666                 };
2667
2668                 if (p->index)
2669                         return -EINVAL;
2670                 err = ops->vidioc_g_tuner(file, fh, &t);
2671                 if (err)
2672                         return err;
2673                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2674                 p->rangelow = t.rangelow;
2675                 p->rangehigh = t.rangehigh;
2676                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2677                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2678                 return 0;
2679         }
2680         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2681                 struct v4l2_modulator m = {
2682                         .index = p->tuner,
2683                 };
2684
2685                 if (type != V4L2_TUNER_RADIO)
2686                         return -EINVAL;
2687                 if (p->index)
2688                         return -EINVAL;
2689                 err = ops->vidioc_g_modulator(file, fh, &m);
2690                 if (err)
2691                         return err;
2692                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2693                 p->rangelow = m.rangelow;
2694                 p->rangehigh = m.rangehigh;
2695                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2696                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2697                 return 0;
2698         }
2699         return -ENOTTY;
2700 }
2701
2702 struct v4l2_ioctl_info {
2703         unsigned int ioctl;
2704         u32 flags;
2705         const char * const name;
2706         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2707                     void *fh, void *p);
2708         void (*debug)(const void *arg, bool write_only);
2709 };
2710
2711 /* This control needs a priority check */
2712 #define INFO_FL_PRIO            (1 << 0)
2713 /* This control can be valid if the filehandle passes a control handler. */
2714 #define INFO_FL_CTRL            (1 << 1)
2715 /* Queuing ioctl */
2716 #define INFO_FL_QUEUE           (1 << 2)
2717 /* Always copy back result, even on error */
2718 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2719 /* Zero struct from after the field to the end */
2720 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2721         ((offsetof(struct v4l2_struct, field) +                 \
2722           sizeof_field(struct v4l2_struct, field)) << 16)
2723 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2724
2725 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2726         static int v4l_stub_ ## _vidioc(                        \
2727                         const struct v4l2_ioctl_ops *ops,       \
2728                         struct file *file, void *fh, void *p)   \
2729         {                                                       \
2730                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2731         }
2732
2733 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2734         [_IOC_NR(_ioctl)] = {                                   \
2735                 .ioctl = _ioctl,                                \
2736                 .flags = _flags,                                \
2737                 .name = #_ioctl,                                \
2738                 .func = _func,                                  \
2739                 .debug = _debug,                                \
2740         }
2741
2742 DEFINE_V4L_STUB_FUNC(g_fbuf)
2743 DEFINE_V4L_STUB_FUNC(s_fbuf)
2744 DEFINE_V4L_STUB_FUNC(expbuf)
2745 DEFINE_V4L_STUB_FUNC(g_std)
2746 DEFINE_V4L_STUB_FUNC(g_audio)
2747 DEFINE_V4L_STUB_FUNC(s_audio)
2748 DEFINE_V4L_STUB_FUNC(g_edid)
2749 DEFINE_V4L_STUB_FUNC(s_edid)
2750 DEFINE_V4L_STUB_FUNC(g_audout)
2751 DEFINE_V4L_STUB_FUNC(s_audout)
2752 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2753 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2754 DEFINE_V4L_STUB_FUNC(enumaudio)
2755 DEFINE_V4L_STUB_FUNC(enumaudout)
2756 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2757 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2758 DEFINE_V4L_STUB_FUNC(g_enc_index)
2759 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2760 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2761 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2762 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2763 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2764 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2765 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2766 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2767 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2768
2769 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2770         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2771         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2772         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2773         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2774         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2775         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2776         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2777         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2778         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2779         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2780         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2781         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2782         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2783         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2784         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2785         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2786         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2787         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2788         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2789         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2790         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2791         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2792         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2793         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2794         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2795         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2796         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2797         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2798         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2799         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2800         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2801         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2802         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2803         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2804         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2805         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2806         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2807         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2808         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2809         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2810         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2811         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2812         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2813         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2814         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2815         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2816         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2817         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2818         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2819         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2820         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2821         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2822         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2823         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2824         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)),
2825         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2826         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2827         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2828         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2829         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2830         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2831         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2832         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2833         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2834         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2835         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2836         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2837         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2838         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2839         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)),
2840         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2841         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2842         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2843         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2844         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2845         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2846         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2847         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2848         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2849         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2850         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)),
2851         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)),
2852 };
2853 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2854
2855 static bool v4l2_is_known_ioctl(unsigned int cmd)
2856 {
2857         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2858                 return false;
2859         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2860 }
2861
2862 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2863                                          struct v4l2_fh *vfh, unsigned int cmd,
2864                                          void *arg)
2865 {
2866         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2867                 return vdev->lock;
2868         if (vfh && vfh->m2m_ctx &&
2869             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2870                 if (vfh->m2m_ctx->q_lock)
2871                         return vfh->m2m_ctx->q_lock;
2872         }
2873         if (vdev->queue && vdev->queue->lock &&
2874                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2875                 return vdev->queue->lock;
2876         return vdev->lock;
2877 }
2878
2879 /* Common ioctl debug function. This function can be used by
2880    external ioctl messages as well as internal V4L ioctl */
2881 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2882 {
2883         const char *dir, *type;
2884
2885         if (prefix)
2886                 printk(KERN_DEBUG "%s: ", prefix);
2887
2888         switch (_IOC_TYPE(cmd)) {
2889         case 'd':
2890                 type = "v4l2_int";
2891                 break;
2892         case 'V':
2893                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2894                         type = "v4l2";
2895                         break;
2896                 }
2897                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2898                 return;
2899         default:
2900                 type = "unknown";
2901                 break;
2902         }
2903
2904         switch (_IOC_DIR(cmd)) {
2905         case _IOC_NONE:              dir = "--"; break;
2906         case _IOC_READ:              dir = "r-"; break;
2907         case _IOC_WRITE:             dir = "-w"; break;
2908         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2909         default:                     dir = "*ERR*"; break;
2910         }
2911         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2912                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2913 }
2914 EXPORT_SYMBOL(v4l_printk_ioctl);
2915
2916 static long __video_do_ioctl(struct file *file,
2917                 unsigned int cmd, void *arg)
2918 {
2919         struct video_device *vfd = video_devdata(file);
2920         struct mutex *req_queue_lock = NULL;
2921         struct mutex *lock; /* ioctl serialization mutex */
2922         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2923         bool write_only = false;
2924         struct v4l2_ioctl_info default_info;
2925         const struct v4l2_ioctl_info *info;
2926         void *fh = file->private_data;
2927         struct v4l2_fh *vfh = NULL;
2928         int dev_debug = vfd->dev_debug;
2929         long ret = -ENOTTY;
2930
2931         if (ops == NULL) {
2932                 pr_warn("%s: has no ioctl_ops.\n",
2933                                 video_device_node_name(vfd));
2934                 return ret;
2935         }
2936
2937         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2938                 vfh = file->private_data;
2939
2940         /*
2941          * We need to serialize streamon/off with queueing new requests.
2942          * These ioctls may trigger the cancellation of a streaming
2943          * operation, and that should not be mixed with queueing a new
2944          * request at the same time.
2945          */
2946         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2947             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2948                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2949
2950                 if (mutex_lock_interruptible(req_queue_lock))
2951                         return -ERESTARTSYS;
2952         }
2953
2954         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2955
2956         if (lock && mutex_lock_interruptible(lock)) {
2957                 if (req_queue_lock)
2958                         mutex_unlock(req_queue_lock);
2959                 return -ERESTARTSYS;
2960         }
2961
2962         if (!video_is_registered(vfd)) {
2963                 ret = -ENODEV;
2964                 goto unlock;
2965         }
2966
2967         if (v4l2_is_known_ioctl(cmd)) {
2968                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2969
2970                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2971                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2972                         goto done;
2973
2974                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2975                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2976                         if (ret)
2977                                 goto done;
2978                 }
2979         } else {
2980                 default_info.ioctl = cmd;
2981                 default_info.flags = 0;
2982                 default_info.debug = v4l_print_default;
2983                 info = &default_info;
2984         }
2985
2986         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2987         if (info != &default_info) {
2988                 ret = info->func(ops, file, fh, arg);
2989         } else if (!ops->vidioc_default) {
2990                 ret = -ENOTTY;
2991         } else {
2992                 ret = ops->vidioc_default(file, fh,
2993                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2994                         cmd, arg);
2995         }
2996
2997 done:
2998         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2999                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3000                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3001                         goto unlock;
3002
3003                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3004                 if (ret < 0)
3005                         pr_cont(": error %ld", ret);
3006                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3007                         pr_cont("\n");
3008                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3009                         info->debug(arg, write_only);
3010                 else {
3011                         pr_cont(": ");
3012                         info->debug(arg, write_only);
3013                 }
3014         }
3015
3016 unlock:
3017         if (lock)
3018                 mutex_unlock(lock);
3019         if (req_queue_lock)
3020                 mutex_unlock(req_queue_lock);
3021         return ret;
3022 }
3023
3024 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3025                             void __user **user_ptr, void ***kernel_ptr)
3026 {
3027         int ret = 0;
3028
3029         switch (cmd) {
3030         case VIDIOC_PREPARE_BUF:
3031         case VIDIOC_QUERYBUF:
3032         case VIDIOC_QBUF:
3033         case VIDIOC_DQBUF: {
3034                 struct v4l2_buffer *buf = parg;
3035
3036                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3037                         if (buf->length > VIDEO_MAX_PLANES) {
3038                                 ret = -EINVAL;
3039                                 break;
3040                         }
3041                         *user_ptr = (void __user *)buf->m.planes;
3042                         *kernel_ptr = (void **)&buf->m.planes;
3043                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3044                         ret = 1;
3045                 }
3046                 break;
3047         }
3048
3049         case VIDIOC_G_EDID:
3050         case VIDIOC_S_EDID: {
3051                 struct v4l2_edid *edid = parg;
3052
3053                 if (edid->blocks) {
3054                         if (edid->blocks > 256) {
3055                                 ret = -EINVAL;
3056                                 break;
3057                         }
3058                         *user_ptr = (void __user *)edid->edid;
3059                         *kernel_ptr = (void **)&edid->edid;
3060                         *array_size = edid->blocks * 128;
3061                         ret = 1;
3062                 }
3063                 break;
3064         }
3065
3066         case VIDIOC_S_EXT_CTRLS:
3067         case VIDIOC_G_EXT_CTRLS:
3068         case VIDIOC_TRY_EXT_CTRLS: {
3069                 struct v4l2_ext_controls *ctrls = parg;
3070
3071                 if (ctrls->count != 0) {
3072                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3073                                 ret = -EINVAL;
3074                                 break;
3075                         }
3076                         *user_ptr = (void __user *)ctrls->controls;
3077                         *kernel_ptr = (void **)&ctrls->controls;
3078                         *array_size = sizeof(struct v4l2_ext_control)
3079                                     * ctrls->count;
3080                         ret = 1;
3081                 }
3082                 break;
3083         }
3084         case VIDIOC_G_FMT:
3085         case VIDIOC_S_FMT:
3086         case VIDIOC_TRY_FMT: {
3087                 struct v4l2_format *fmt = parg;
3088
3089                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3090                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3091                         break;
3092                 if (fmt->fmt.win.clipcount > 2048)
3093                         return -EINVAL;
3094                 if (!fmt->fmt.win.clipcount)
3095                         break;
3096
3097                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3098                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3099                 *array_size = sizeof(struct v4l2_clip)
3100                                 * fmt->fmt.win.clipcount;
3101
3102                 ret = 1;
3103                 break;
3104         }
3105         }
3106
3107         return ret;
3108 }
3109
3110 static unsigned int video_translate_cmd(unsigned int cmd)
3111 {
3112 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3113         switch (cmd) {
3114         case VIDIOC_DQEVENT_TIME32:
3115                 return VIDIOC_DQEVENT;
3116         case VIDIOC_QUERYBUF_TIME32:
3117                 return VIDIOC_QUERYBUF;
3118         case VIDIOC_QBUF_TIME32:
3119                 return VIDIOC_QBUF;
3120         case VIDIOC_DQBUF_TIME32:
3121                 return VIDIOC_DQBUF;
3122         case VIDIOC_PREPARE_BUF_TIME32:
3123                 return VIDIOC_PREPARE_BUF;
3124         }
3125 #endif
3126         if (in_compat_syscall())
3127                 return v4l2_compat_translate_cmd(cmd);
3128
3129         return cmd;
3130 }
3131
3132 static int video_get_user(void __user *arg, void *parg,
3133                           unsigned int real_cmd, unsigned int cmd,
3134                           bool *always_copy)
3135 {
3136         unsigned int n = _IOC_SIZE(real_cmd);
3137         int err = 0;
3138
3139         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3140                 /* read-only ioctl */
3141                 memset(parg, 0, n);
3142                 return 0;
3143         }
3144
3145         /*
3146          * In some cases, only a few fields are used as input,
3147          * i.e. when the app sets "index" and then the driver
3148          * fills in the rest of the structure for the thing
3149          * with that index.  We only need to copy up the first
3150          * non-input field.
3151          */
3152         if (v4l2_is_known_ioctl(real_cmd)) {
3153                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3154
3155                 if (flags & INFO_FL_CLEAR_MASK)
3156                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3157                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3158         }
3159
3160         if (cmd == real_cmd) {
3161                 if (copy_from_user(parg, (void __user *)arg, n))
3162                         err = -EFAULT;
3163         } else if (in_compat_syscall()) {
3164                 memset(parg, 0, n);
3165                 err = v4l2_compat_get_user(arg, parg, cmd);
3166         } else {
3167                 memset(parg, 0, n);
3168 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3169                 switch (cmd) {
3170                 case VIDIOC_QUERYBUF_TIME32:
3171                 case VIDIOC_QBUF_TIME32:
3172                 case VIDIOC_DQBUF_TIME32:
3173                 case VIDIOC_PREPARE_BUF_TIME32: {
3174                         struct v4l2_buffer_time32 vb32;
3175                         struct v4l2_buffer *vb = parg;
3176
3177                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3178                                 return -EFAULT;
3179
3180                         *vb = (struct v4l2_buffer) {
3181                                 .index          = vb32.index,
3182                                 .type           = vb32.type,
3183                                 .bytesused      = vb32.bytesused,
3184                                 .flags          = vb32.flags,
3185                                 .field          = vb32.field,
3186                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3187                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3188                                 .timecode       = vb32.timecode,
3189                                 .sequence       = vb32.sequence,
3190                                 .memory         = vb32.memory,
3191                                 .m.userptr      = vb32.m.userptr,
3192                                 .length         = vb32.length,
3193                                 .request_fd     = vb32.request_fd,
3194                         };
3195                         break;
3196                 }
3197                 }
3198 #endif
3199         }
3200
3201         /* zero out anything we don't copy from userspace */
3202         if (!err && n < _IOC_SIZE(real_cmd))
3203                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3204         return err;
3205 }
3206
3207 static int video_put_user(void __user *arg, void *parg,
3208                           unsigned int real_cmd, unsigned int cmd)
3209 {
3210         if (!(_IOC_DIR(cmd) & _IOC_READ))
3211                 return 0;
3212
3213         if (cmd == real_cmd) {
3214                 /*  Copy results into user buffer  */
3215                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3216                         return -EFAULT;
3217                 return 0;
3218         }
3219
3220         if (in_compat_syscall())
3221                 return v4l2_compat_put_user(arg, parg, cmd);
3222
3223 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3224         switch (cmd) {
3225         case VIDIOC_DQEVENT_TIME32: {
3226                 struct v4l2_event *ev = parg;
3227                 struct v4l2_event_time32 ev32;
3228
3229                 memset(&ev32, 0, sizeof(ev32));
3230
3231                 ev32.type       = ev->type;
3232                 ev32.pending    = ev->pending;
3233                 ev32.sequence   = ev->sequence;
3234                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3235                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3236                 ev32.id         = ev->id;
3237
3238                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3239                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3240
3241                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3242                         return -EFAULT;
3243                 break;
3244         }
3245         case VIDIOC_QUERYBUF_TIME32:
3246         case VIDIOC_QBUF_TIME32:
3247         case VIDIOC_DQBUF_TIME32:
3248         case VIDIOC_PREPARE_BUF_TIME32: {
3249                 struct v4l2_buffer *vb = parg;
3250                 struct v4l2_buffer_time32 vb32;
3251
3252                 memset(&vb32, 0, sizeof(vb32));
3253
3254                 vb32.index      = vb->index;
3255                 vb32.type       = vb->type;
3256                 vb32.bytesused  = vb->bytesused;
3257                 vb32.flags      = vb->flags;
3258                 vb32.field      = vb->field;
3259                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3260                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3261                 vb32.timecode   = vb->timecode;
3262                 vb32.sequence   = vb->sequence;
3263                 vb32.memory     = vb->memory;
3264                 vb32.m.userptr  = vb->m.userptr;
3265                 vb32.length     = vb->length;
3266                 vb32.request_fd = vb->request_fd;
3267
3268                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3269                         return -EFAULT;
3270                 break;
3271         }
3272         }
3273 #endif
3274
3275         return 0;
3276 }
3277
3278 long
3279 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3280                v4l2_kioctl func)
3281 {
3282         char    sbuf[128];
3283         void    *mbuf = NULL, *array_buf = NULL;
3284         void    *parg = (void *)arg;
3285         long    err  = -EINVAL;
3286         bool    has_array_args;
3287         bool    always_copy = false;
3288         size_t  array_size = 0;
3289         void __user *user_ptr = NULL;
3290         void    **kernel_ptr = NULL;
3291         unsigned int cmd = video_translate_cmd(orig_cmd);
3292         const size_t ioc_size = _IOC_SIZE(cmd);
3293
3294         /*  Copy arguments into temp kernel buffer  */
3295         if (_IOC_DIR(cmd) != _IOC_NONE) {
3296                 if (ioc_size <= sizeof(sbuf)) {
3297                         parg = sbuf;
3298                 } else {
3299                         /* too big to allocate from stack */
3300                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3301                         if (NULL == mbuf)
3302                                 return -ENOMEM;
3303                         parg = mbuf;
3304                 }
3305
3306                 err = video_get_user((void __user *)arg, parg, cmd,
3307                                      orig_cmd, &always_copy);
3308                 if (err)
3309                         goto out;
3310         }
3311
3312         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3313         if (err < 0)
3314                 goto out;
3315         has_array_args = err;
3316
3317         if (has_array_args) {
3318                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3319                 err = -ENOMEM;
3320                 if (array_buf == NULL)
3321                         goto out_array_args;
3322                 err = -EFAULT;
3323                 if (in_compat_syscall())
3324                         err = v4l2_compat_get_array_args(file, array_buf,
3325                                                          user_ptr, array_size,
3326                                                          orig_cmd, parg);
3327                 else
3328                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3329                                                                 -EFAULT : 0;
3330                 if (err)
3331                         goto out_array_args;
3332                 *kernel_ptr = array_buf;
3333         }
3334
3335         /* Handles IOCTL */
3336         err = func(file, cmd, parg);
3337         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3338                 err = -ENOTTY;
3339                 goto out;
3340         }
3341
3342         if (err == 0) {
3343                 if (cmd == VIDIOC_DQBUF)
3344                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3345                 else if (cmd == VIDIOC_QBUF)
3346                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3347         }
3348
3349         if (has_array_args) {
3350                 *kernel_ptr = (void __force *)user_ptr;
3351                 if (in_compat_syscall()) {
3352                         int put_err;
3353
3354                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3355                                                              array_buf,
3356                                                              array_size,
3357                                                              orig_cmd, parg);
3358                         if (put_err)
3359                                 err = put_err;
3360                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3361                         err = -EFAULT;
3362                 }
3363                 goto out_array_args;
3364         }
3365         /*
3366          * Some ioctls can return an error, but still have valid
3367          * results that must be returned.
3368          */
3369         if (err < 0 && !always_copy)
3370                 goto out;
3371
3372 out_array_args:
3373         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3374                 err = -EFAULT;
3375 out:
3376         kvfree(array_buf);
3377         kfree(mbuf);
3378         return err;
3379 }
3380
3381 long video_ioctl2(struct file *file,
3382                unsigned int cmd, unsigned long arg)
3383 {
3384         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3385 }
3386 EXPORT_SYMBOL(video_ioctl2);