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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
  13  */
  14
  15 #include <linux/mm.h>
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/types.h>
  19 #include <linux/kernel.h>
  20 #include <linux/version.h>
  21
  22 #include <linux/videodev2.h>
  23
  24 #include <media/v4l2-common.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/v4l2-ctrls.h>
  27 #include <media/v4l2-fh.h>
  28 #include <media/v4l2-event.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/videobuf2-v4l2.h>
  31 #include <media/v4l2-mc.h>
  32 #include <media/v4l2-mem2mem.h>
  33
  34 #include <trace/events/v4l2.h>
  35
  36 /* Zero out the end of the struct pointed to by p.  Everything after, but
  37  * not including, the specified field is cleared. */
  38 #define CLEAR_AFTER_FIELD(p, field) \
  39         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  40         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  41
  42 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  43
  44 struct std_descr {
  45         v4l2_std_id std;
  46         const char *descr;
  47 };
  48
  49 static const struct std_descr standards[] = {
  50         { V4L2_STD_NTSC,        "NTSC"      },
  51         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  52         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  53         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  54         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  55         { V4L2_STD_PAL,         "PAL"       },
  56         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  57         { V4L2_STD_PAL_B,       "PAL-B"     },
  58         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  59         { V4L2_STD_PAL_G,       "PAL-G"     },
  60         { V4L2_STD_PAL_H,       "PAL-H"     },
  61         { V4L2_STD_PAL_I,       "PAL-I"     },
  62         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  63         { V4L2_STD_PAL_D,       "PAL-D"     },
  64         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  65         { V4L2_STD_PAL_K,       "PAL-K"     },
  66         { V4L2_STD_PAL_M,       "PAL-M"     },
  67         { V4L2_STD_PAL_N,       "PAL-N"     },
  68         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  69         { V4L2_STD_PAL_60,      "PAL-60"    },
  70         { V4L2_STD_SECAM,       "SECAM"     },
  71         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  72         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  73         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  74         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  75         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  76         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  77         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  78         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  79         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  80         { 0,                    "Unknown"   }
  81 };
  82
  83 /* video4linux standard ID conversion to standard name
  84  */
  85 const char *v4l2_norm_to_name(v4l2_std_id id)
  86 {
  87         u32 myid = id;
  88         int i;
  89
  90         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  91            64 bit comparations. So, on that architecture, with some gcc
  92            variants, compilation fails. Currently, the max value is 30bit wide.
  93          */
  94         BUG_ON(myid != id);
  95
  96         for (i = 0; standards[i].std; i++)
  97                 if (myid == standards[i].std)
  98                         break;
  99         return standards[i].descr;
 100 }
 101 EXPORT_SYMBOL(v4l2_norm_to_name);
 102
 103 /* Returns frame period for the given standard */
 104 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 105 {
 106         if (id & V4L2_STD_525_60) {
 107                 frameperiod->numerator = 1001;
 108                 frameperiod->denominator = 30000;
 109         } else {
 110                 frameperiod->numerator = 1;
 111                 frameperiod->denominator = 25;
 112         }
 113 }
 114 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 115
 116 /* Fill in the fields of a v4l2_standard structure according to the
 117    'id' and 'transmission' parameters.  Returns negative on error.  */
 118 int v4l2_video_std_construct(struct v4l2_standard *vs,
 119                              int id, const char *name)
 120 {
 121         vs->id = id;
 122         v4l2_video_std_frame_period(id, &vs->frameperiod);
 123         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 124         strlcpy(vs->name, name, sizeof(vs->name));
 125         return 0;
 126 }
 127 EXPORT_SYMBOL(v4l2_video_std_construct);
 128
 129 /* Fill in the fields of a v4l2_standard structure according to the
 130  * 'id' and 'vs->index' parameters. Returns negative on error. */
 131 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 132 {
 133         v4l2_std_id curr_id = 0;
 134         unsigned int index = vs->index, i, j = 0;
 135         const char *descr = "";
 136
 137         /* Return -ENODATA if the id for the current input
 138            or output is 0, meaning that it doesn't support this API. */
 139         if (id == 0)
 140                 return -ENODATA;
 141
 142         /* Return norm array in a canonical way */
 143         for (i = 0; i <= index && id; i++) {
 144                 /* last std value in the standards array is 0, so this
 145                    while always ends there since (id & 0) == 0. */
 146                 while ((id & standards[j].std) != standards[j].std)
 147                         j++;
 148                 curr_id = standards[j].std;
 149                 descr = standards[j].descr;
 150                 j++;
 151                 if (curr_id == 0)
 152                         break;
 153                 if (curr_id != V4L2_STD_PAL &&
 154                                 curr_id != V4L2_STD_SECAM &&
 155                                 curr_id != V4L2_STD_NTSC)
 156                         id &= ~curr_id;
 157         }
 158         if (i <= index)
 159                 return -EINVAL;
 160
 161         v4l2_video_std_construct(vs, curr_id, descr);
 162         return 0;
 163 }
 164
 165 /* ----------------------------------------------------------------- */
 166 /* some arrays for pretty-printing debug messages of enum types      */
 167
 168 const char *v4l2_field_names[] = {
 169         [V4L2_FIELD_ANY]        = "any",
 170         [V4L2_FIELD_NONE]       = "none",
 171         [V4L2_FIELD_TOP]        = "top",
 172         [V4L2_FIELD_BOTTOM]     = "bottom",
 173         [V4L2_FIELD_INTERLACED] = "interlaced",
 174         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 175         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 176         [V4L2_FIELD_ALTERNATE]  = "alternate",
 177         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 178         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 179 };
 180 EXPORT_SYMBOL(v4l2_field_names);
 181
 182 const char *v4l2_type_names[] = {
 183         [0]                                = "0",
 184         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 185         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 186         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 187         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 188         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 189         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 190         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 191         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 192         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 193         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 194         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 195         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 196         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 197 };
 198 EXPORT_SYMBOL(v4l2_type_names);
 199
 200 static const char *v4l2_memory_names[] = {
 201         [V4L2_MEMORY_MMAP]    = "mmap",
 202         [V4L2_MEMORY_USERPTR] = "userptr",
 203         [V4L2_MEMORY_OVERLAY] = "overlay",
 204         [V4L2_MEMORY_DMABUF] = "dmabuf",
 205 };
 206
 207 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 208
 209 /* ------------------------------------------------------------------ */
 210 /* debug help functions                                               */
 211
 212 static void v4l_print_querycap(const void *arg, bool write_only)
 213 {
 214         const struct v4l2_capability *p = arg;
 215
 216         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 217                 (int)sizeof(p->driver), p->driver,
 218                 (int)sizeof(p->card), p->card,
 219                 (int)sizeof(p->bus_info), p->bus_info,
 220                 p->version, p->capabilities, p->device_caps);
 221 }
 222
 223 static void v4l_print_enuminput(const void *arg, bool write_only)
 224 {
 225         const struct v4l2_input *p = arg;
 226
 227         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 228                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 229                 p->tuner, (unsigned long long)p->std, p->status,
 230                 p->capabilities);
 231 }
 232
 233 static void v4l_print_enumoutput(const void *arg, bool write_only)
 234 {
 235         const struct v4l2_output *p = arg;
 236
 237         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 238                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 239                 p->modulator, (unsigned long long)p->std, p->capabilities);
 240 }
 241
 242 static void v4l_print_audio(const void *arg, bool write_only)
 243 {
 244         const struct v4l2_audio *p = arg;
 245
 246         if (write_only)
 247                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 248         else
 249                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 250                         p->index, (int)sizeof(p->name), p->name,
 251                         p->capability, p->mode);
 252 }
 253
 254 static void v4l_print_audioout(const void *arg, bool write_only)
 255 {
 256         const struct v4l2_audioout *p = arg;
 257
 258         if (write_only)
 259                 pr_cont("index=%u\n", p->index);
 260         else
 261                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 262                         p->index, (int)sizeof(p->name), p->name,
 263                         p->capability, p->mode);
 264 }
 265
 266 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 267 {
 268         const struct v4l2_fmtdesc *p = arg;
 269
 270         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 271                 p->index, prt_names(p->type, v4l2_type_names),
 272                 p->flags, (p->pixelformat & 0xff),
 273                 (p->pixelformat >>  8) & 0xff,
 274                 (p->pixelformat >> 16) & 0xff,
 275                 (p->pixelformat >> 24) & 0xff,
 276                 (int)sizeof(p->description), p->description);
 277 }
 278
 279 static void v4l_print_format(const void *arg, bool write_only)
 280 {
 281         const struct v4l2_format *p = arg;
 282         const struct v4l2_pix_format *pix;
 283         const struct v4l2_pix_format_mplane *mp;
 284         const struct v4l2_vbi_format *vbi;
 285         const struct v4l2_sliced_vbi_format *sliced;
 286         const struct v4l2_window *win;
 287         const struct v4l2_sdr_format *sdr;
 288         const struct v4l2_meta_format *meta;
 289         unsigned i;
 290
 291         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 292         switch (p->type) {
 293         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 294         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 295                 pix = &p->fmt.pix;
 296                 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 297                         pix->width, pix->height,
 298                         (pix->pixelformat & 0xff),
 299                         (pix->pixelformat >>  8) & 0xff,
 300                         (pix->pixelformat >> 16) & 0xff,
 301                         (pix->pixelformat >> 24) & 0xff,
 302                         prt_names(pix->field, v4l2_field_names),
 303                         pix->bytesperline, pix->sizeimage,
 304                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 305                         pix->quantization, pix->xfer_func);
 306                 break;
 307         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 308         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 309                 mp = &p->fmt.pix_mp;
 310                 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 311                         mp->width, mp->height,
 312                         (mp->pixelformat & 0xff),
 313                         (mp->pixelformat >>  8) & 0xff,
 314                         (mp->pixelformat >> 16) & 0xff,
 315                         (mp->pixelformat >> 24) & 0xff,
 316                         prt_names(mp->field, v4l2_field_names),
 317                         mp->colorspace, mp->num_planes, mp->flags,
 318                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 319                 for (i = 0; i < mp->num_planes; i++)
 320                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 321                                         mp->plane_fmt[i].bytesperline,
 322                                         mp->plane_fmt[i].sizeimage);
 323                 break;
 324         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 325         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 326                 win = &p->fmt.win;
 327                 /* Note: we can't print the clip list here since the clips
 328                  * pointer is a userspace pointer, not a kernelspace
 329                  * pointer. */
 330                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 331                         win->w.width, win->w.height, win->w.left, win->w.top,
 332                         prt_names(win->field, v4l2_field_names),
 333                         win->chromakey, win->clipcount, win->clips,
 334                         win->bitmap, win->global_alpha);
 335                 break;
 336         case V4L2_BUF_TYPE_VBI_CAPTURE:
 337         case V4L2_BUF_TYPE_VBI_OUTPUT:
 338                 vbi = &p->fmt.vbi;
 339                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 340                         vbi->sampling_rate, vbi->offset,
 341                         vbi->samples_per_line,
 342                         (vbi->sample_format & 0xff),
 343                         (vbi->sample_format >>  8) & 0xff,
 344                         (vbi->sample_format >> 16) & 0xff,
 345                         (vbi->sample_format >> 24) & 0xff,
 346                         vbi->start[0], vbi->start[1],
 347                         vbi->count[0], vbi->count[1]);
 348                 break;
 349         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 350         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 351                 sliced = &p->fmt.sliced;
 352                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 353                                 sliced->service_set, sliced->io_size);
 354                 for (i = 0; i < 24; i++)
 355                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 356                                 sliced->service_lines[0][i],
 357                                 sliced->service_lines[1][i]);
 358                 break;
 359         case V4L2_BUF_TYPE_SDR_CAPTURE:
 360         case V4L2_BUF_TYPE_SDR_OUTPUT:
 361                 sdr = &p->fmt.sdr;
 362                 pr_cont(", pixelformat=%c%c%c%c\n",
 363                         (sdr->pixelformat >>  0) & 0xff,
 364                         (sdr->pixelformat >>  8) & 0xff,
 365                         (sdr->pixelformat >> 16) & 0xff,
 366                         (sdr->pixelformat >> 24) & 0xff);
 367                 break;
 368         case V4L2_BUF_TYPE_META_CAPTURE:
 369                 meta = &p->fmt.meta;
 370                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 371                         (meta->dataformat >>  0) & 0xff,
 372                         (meta->dataformat >>  8) & 0xff,
 373                         (meta->dataformat >> 16) & 0xff,
 374                         (meta->dataformat >> 24) & 0xff,
 375                         meta->buffersize);
 376                 break;
 377         }
 378 }
 379
 380 static void v4l_print_framebuffer(const void *arg, bool write_only)
 381 {
 382         const struct v4l2_framebuffer *p = arg;
 383
 384         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 385                         p->capability, p->flags, p->base,
 386                         p->fmt.width, p->fmt.height,
 387                         (p->fmt.pixelformat & 0xff),
 388                         (p->fmt.pixelformat >>  8) & 0xff,
 389                         (p->fmt.pixelformat >> 16) & 0xff,
 390                         (p->fmt.pixelformat >> 24) & 0xff,
 391                         p->fmt.bytesperline, p->fmt.sizeimage,
 392                         p->fmt.colorspace);
 393 }
 394
 395 static void v4l_print_buftype(const void *arg, bool write_only)
 396 {
 397         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 398 }
 399
 400 static void v4l_print_modulator(const void *arg, bool write_only)
 401 {
 402         const struct v4l2_modulator *p = arg;
 403
 404         if (write_only)
 405                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 406         else
 407                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 408                         p->index, (int)sizeof(p->name), p->name, p->capability,
 409                         p->rangelow, p->rangehigh, p->txsubchans);
 410 }
 411
 412 static void v4l_print_tuner(const void *arg, bool write_only)
 413 {
 414         const struct v4l2_tuner *p = arg;
 415
 416         if (write_only)
 417                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 418         else
 419                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 420                         p->index, (int)sizeof(p->name), p->name, p->type,
 421                         p->capability, p->rangelow,
 422                         p->rangehigh, p->signal, p->afc,
 423                         p->rxsubchans, p->audmode);
 424 }
 425
 426 static void v4l_print_frequency(const void *arg, bool write_only)
 427 {
 428         const struct v4l2_frequency *p = arg;
 429
 430         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 431                                 p->tuner, p->type, p->frequency);
 432 }
 433
 434 static void v4l_print_standard(const void *arg, bool write_only)
 435 {
 436         const struct v4l2_standard *p = arg;
 437
 438         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 439                 p->index,
 440                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 441                 p->frameperiod.numerator,
 442                 p->frameperiod.denominator,
 443                 p->framelines);
 444 }
 445
 446 static void v4l_print_std(const void *arg, bool write_only)
 447 {
 448         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 449 }
 450
 451 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 452 {
 453         const struct v4l2_hw_freq_seek *p = arg;
 454
 455         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 456                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 457                 p->rangelow, p->rangehigh);
 458 }
 459
 460 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 461 {
 462         const struct v4l2_requestbuffers *p = arg;
 463
 464         pr_cont("count=%d, type=%s, memory=%s\n",
 465                 p->count,
 466                 prt_names(p->type, v4l2_type_names),
 467                 prt_names(p->memory, v4l2_memory_names));
 468 }
 469
 470 static void v4l_print_buffer(const void *arg, bool write_only)
 471 {
 472         const struct v4l2_buffer *p = arg;
 473         const struct v4l2_timecode *tc = &p->timecode;
 474         const struct v4l2_plane *plane;
 475         int i;
 476
 477         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 478                         p->timestamp.tv_sec / 3600,
 479                         (int)(p->timestamp.tv_sec / 60) % 60,
 480                         (int)(p->timestamp.tv_sec % 60),
 481                         (long)p->timestamp.tv_usec,
 482                         p->index,
 483                         prt_names(p->type, v4l2_type_names),
 484                         p->flags, prt_names(p->field, v4l2_field_names),
 485                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 486
 487         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 488                 pr_cont("\n");
 489                 for (i = 0; i < p->length; ++i) {
 490                         plane = &p->m.planes[i];
 491                         printk(KERN_DEBUG
 492                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 493                                 i, plane->bytesused, plane->data_offset,
 494                                 plane->m.userptr, plane->length);
 495                 }
 496         } else {
 497                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 498                         p->bytesused, p->m.userptr, p->length);
 499         }
 500
 501         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 502                         tc->hours, tc->minutes, tc->seconds,
 503                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 504 }
 505
 506 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 507 {
 508         const struct v4l2_exportbuffer *p = arg;
 509
 510         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 511                 p->fd, prt_names(p->type, v4l2_type_names),
 512                 p->index, p->plane, p->flags);
 513 }
 514
 515 static void v4l_print_create_buffers(const void *arg, bool write_only)
 516 {
 517         const struct v4l2_create_buffers *p = arg;
 518
 519         pr_cont("index=%d, count=%d, memory=%s, ",
 520                         p->index, p->count,
 521                         prt_names(p->memory, v4l2_memory_names));
 522         v4l_print_format(&p->format, write_only);
 523 }
 524
 525 static void v4l_print_streamparm(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_streamparm *p = arg;
 528
 529         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 530
 531         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 532             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 533                 const struct v4l2_captureparm *c = &p->parm.capture;
 534
 535                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 536                         c->capability, c->capturemode,
 537                         c->timeperframe.numerator, c->timeperframe.denominator,
 538                         c->extendedmode, c->readbuffers);
 539         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 540                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 541                 const struct v4l2_outputparm *c = &p->parm.output;
 542
 543                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 544                         c->capability, c->outputmode,
 545                         c->timeperframe.numerator, c->timeperframe.denominator,
 546                         c->extendedmode, c->writebuffers);
 547         } else {
 548                 pr_cont("\n");
 549         }
 550 }
 551
 552 static void v4l_print_queryctrl(const void *arg, bool write_only)
 553 {
 554         const struct v4l2_queryctrl *p = arg;
 555
 556         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 557                         p->id, p->type, (int)sizeof(p->name), p->name,
 558                         p->minimum, p->maximum,
 559                         p->step, p->default_value, p->flags);
 560 }
 561
 562 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 563 {
 564         const struct v4l2_query_ext_ctrl *p = arg;
 565
 566         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 567                         p->id, p->type, (int)sizeof(p->name), p->name,
 568                         p->minimum, p->maximum,
 569                         p->step, p->default_value, p->flags,
 570                         p->elem_size, p->elems, p->nr_of_dims,
 571                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 572 }
 573
 574 static void v4l_print_querymenu(const void *arg, bool write_only)
 575 {
 576         const struct v4l2_querymenu *p = arg;
 577
 578         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 579 }
 580
 581 static void v4l_print_control(const void *arg, bool write_only)
 582 {
 583         const struct v4l2_control *p = arg;
 584
 585         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 586 }
 587
 588 static void v4l_print_ext_controls(const void *arg, bool write_only)
 589 {
 590         const struct v4l2_ext_controls *p = arg;
 591         int i;
 592
 593         pr_cont("which=0x%x, count=%d, error_idx=%d",
 594                         p->which, p->count, p->error_idx);
 595         for (i = 0; i < p->count; i++) {
 596                 if (!p->controls[i].size)
 597                         pr_cont(", id/val=0x%x/0x%x",
 598                                 p->controls[i].id, p->controls[i].value);
 599                 else
 600                         pr_cont(", id/size=0x%x/%u",
 601                                 p->controls[i].id, p->controls[i].size);
 602         }
 603         pr_cont("\n");
 604 }
 605
 606 static void v4l_print_cropcap(const void *arg, bool write_only)
 607 {
 608         const struct v4l2_cropcap *p = arg;
 609
 610         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 611                 prt_names(p->type, v4l2_type_names),
 612                 p->bounds.width, p->bounds.height,
 613                 p->bounds.left, p->bounds.top,
 614                 p->defrect.width, p->defrect.height,
 615                 p->defrect.left, p->defrect.top,
 616                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 617 }
 618
 619 static void v4l_print_crop(const void *arg, bool write_only)
 620 {
 621         const struct v4l2_crop *p = arg;
 622
 623         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 624                 prt_names(p->type, v4l2_type_names),
 625                 p->c.width, p->c.height,
 626                 p->c.left, p->c.top);
 627 }
 628
 629 static void v4l_print_selection(const void *arg, bool write_only)
 630 {
 631         const struct v4l2_selection *p = arg;
 632
 633         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 634                 prt_names(p->type, v4l2_type_names),
 635                 p->target, p->flags,
 636                 p->r.width, p->r.height, p->r.left, p->r.top);
 637 }
 638
 639 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_jpegcompression *p = arg;
 642
 643         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 644                 p->quality, p->APPn, p->APP_len,
 645                 p->COM_len, p->jpeg_markers);
 646 }
 647
 648 static void v4l_print_enc_idx(const void *arg, bool write_only)
 649 {
 650         const struct v4l2_enc_idx *p = arg;
 651
 652         pr_cont("entries=%d, entries_cap=%d\n",
 653                         p->entries, p->entries_cap);
 654 }
 655
 656 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_encoder_cmd *p = arg;
 659
 660         pr_cont("cmd=%d, flags=0x%x\n",
 661                         p->cmd, p->flags);
 662 }
 663
 664 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 665 {
 666         const struct v4l2_decoder_cmd *p = arg;
 667
 668         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 669
 670         if (p->cmd == V4L2_DEC_CMD_START)
 671                 pr_info("speed=%d, format=%u\n",
 672                                 p->start.speed, p->start.format);
 673         else if (p->cmd == V4L2_DEC_CMD_STOP)
 674                 pr_info("pts=%llu\n", p->stop.pts);
 675 }
 676
 677 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 678 {
 679         const struct v4l2_dbg_chip_info *p = arg;
 680
 681         pr_cont("type=%u, ", p->match.type);
 682         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 683                 pr_cont("name=%.*s, ",
 684                                 (int)sizeof(p->match.name), p->match.name);
 685         else
 686                 pr_cont("addr=%u, ", p->match.addr);
 687         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 688 }
 689
 690 static void v4l_print_dbg_register(const void *arg, bool write_only)
 691 {
 692         const struct v4l2_dbg_register *p = arg;
 693
 694         pr_cont("type=%u, ", p->match.type);
 695         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 696                 pr_cont("name=%.*s, ",
 697                                 (int)sizeof(p->match.name), p->match.name);
 698         else
 699                 pr_cont("addr=%u, ", p->match.addr);
 700         pr_cont("reg=0x%llx, val=0x%llx\n",
 701                         p->reg, p->val);
 702 }
 703
 704 static void v4l_print_dv_timings(const void *arg, bool write_only)
 705 {
 706         const struct v4l2_dv_timings *p = arg;
 707
 708         switch (p->type) {
 709         case V4L2_DV_BT_656_1120:
 710                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 711                                 p->bt.interlaced, p->bt.pixelclock,
 712                                 p->bt.width, p->bt.height,
 713                                 p->bt.polarities, p->bt.hfrontporch,
 714                                 p->bt.hsync, p->bt.hbackporch,
 715                                 p->bt.vfrontporch, p->bt.vsync,
 716                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 717                                 p->bt.il_vsync, p->bt.il_vbackporch,
 718                                 p->bt.standards, p->bt.flags);
 719                 break;
 720         default:
 721                 pr_cont("type=%d\n", p->type);
 722                 break;
 723         }
 724 }
 725
 726 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 727 {
 728         const struct v4l2_enum_dv_timings *p = arg;
 729
 730         pr_cont("index=%u, ", p->index);
 731         v4l_print_dv_timings(&p->timings, write_only);
 732 }
 733
 734 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 735 {
 736         const struct v4l2_dv_timings_cap *p = arg;
 737
 738         switch (p->type) {
 739         case V4L2_DV_BT_656_1120:
 740                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 741                         p->bt.min_width, p->bt.max_width,
 742                         p->bt.min_height, p->bt.max_height,
 743                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 744                         p->bt.standards, p->bt.capabilities);
 745                 break;
 746         default:
 747                 pr_cont("type=%u\n", p->type);
 748                 break;
 749         }
 750 }
 751
 752 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 753 {
 754         const struct v4l2_frmsizeenum *p = arg;
 755
 756         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 757                         p->index,
 758                         (p->pixel_format & 0xff),
 759                         (p->pixel_format >>  8) & 0xff,
 760                         (p->pixel_format >> 16) & 0xff,
 761                         (p->pixel_format >> 24) & 0xff,
 762                         p->type);
 763         switch (p->type) {
 764         case V4L2_FRMSIZE_TYPE_DISCRETE:
 765                 pr_cont(", wxh=%ux%u\n",
 766                         p->discrete.width, p->discrete.height);
 767                 break;
 768         case V4L2_FRMSIZE_TYPE_STEPWISE:
 769                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 770                                 p->stepwise.min_width,
 771                                 p->stepwise.min_height,
 772                                 p->stepwise.max_width,
 773                                 p->stepwise.max_height,
 774                                 p->stepwise.step_width,
 775                                 p->stepwise.step_height);
 776                 break;
 777         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 778                 /* fall through */
 779         default:
 780                 pr_cont("\n");
 781                 break;
 782         }
 783 }
 784
 785 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 786 {
 787         const struct v4l2_frmivalenum *p = arg;
 788
 789         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 790                         p->index,
 791                         (p->pixel_format & 0xff),
 792                         (p->pixel_format >>  8) & 0xff,
 793                         (p->pixel_format >> 16) & 0xff,
 794                         (p->pixel_format >> 24) & 0xff,
 795                         p->width, p->height, p->type);
 796         switch (p->type) {
 797         case V4L2_FRMIVAL_TYPE_DISCRETE:
 798                 pr_cont(", fps=%d/%d\n",
 799                                 p->discrete.numerator,
 800                                 p->discrete.denominator);
 801                 break;
 802         case V4L2_FRMIVAL_TYPE_STEPWISE:
 803                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 804                                 p->stepwise.min.numerator,
 805                                 p->stepwise.min.denominator,
 806                                 p->stepwise.max.numerator,
 807                                 p->stepwise.max.denominator,
 808                                 p->stepwise.step.numerator,
 809                                 p->stepwise.step.denominator);
 810                 break;
 811         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 812                 /* fall through */
 813         default:
 814                 pr_cont("\n");
 815                 break;
 816         }
 817 }
 818
 819 static void v4l_print_event(const void *arg, bool write_only)
 820 {
 821         const struct v4l2_event *p = arg;
 822         const struct v4l2_event_ctrl *c;
 823
 824         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 825                         p->type, p->pending, p->sequence, p->id,
 826                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 827         switch (p->type) {
 828         case V4L2_EVENT_VSYNC:
 829                 printk(KERN_DEBUG "field=%s\n",
 830                         prt_names(p->u.vsync.field, v4l2_field_names));
 831                 break;
 832         case V4L2_EVENT_CTRL:
 833                 c = &p->u.ctrl;
 834                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 835                         c->changes, c->type);
 836                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 837                         pr_cont("value64=%lld, ", c->value64);
 838                 else
 839                         pr_cont("value=%d, ", c->value);
 840                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 841                         c->flags, c->minimum, c->maximum,
 842                         c->step, c->default_value);
 843                 break;
 844         case V4L2_EVENT_FRAME_SYNC:
 845                 pr_cont("frame_sequence=%u\n",
 846                         p->u.frame_sync.frame_sequence);
 847                 break;
 848         }
 849 }
 850
 851 static void v4l_print_event_subscription(const void *arg, bool write_only)
 852 {
 853         const struct v4l2_event_subscription *p = arg;
 854
 855         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 856                         p->type, p->id, p->flags);
 857 }
 858
 859 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 860 {
 861         const struct v4l2_sliced_vbi_cap *p = arg;
 862         int i;
 863
 864         pr_cont("type=%s, service_set=0x%08x\n",
 865                         prt_names(p->type, v4l2_type_names), p->service_set);
 866         for (i = 0; i < 24; i++)
 867                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 868                                 p->service_lines[0][i],
 869                                 p->service_lines[1][i]);
 870 }
 871
 872 static void v4l_print_freq_band(const void *arg, bool write_only)
 873 {
 874         const struct v4l2_frequency_band *p = arg;
 875
 876         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 877                         p->tuner, p->type, p->index,
 878                         p->capability, p->rangelow,
 879                         p->rangehigh, p->modulation);
 880 }
 881
 882 static void v4l_print_edid(const void *arg, bool write_only)
 883 {
 884         const struct v4l2_edid *p = arg;
 885
 886         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 887                 p->pad, p->start_block, p->blocks);
 888 }
 889
 890 static void v4l_print_u32(const void *arg, bool write_only)
 891 {
 892         pr_cont("value=%u\n", *(const u32 *)arg);
 893 }
 894
 895 static void v4l_print_newline(const void *arg, bool write_only)
 896 {
 897         pr_cont("\n");
 898 }
 899
 900 static void v4l_print_default(const void *arg, bool write_only)
 901 {
 902         pr_cont("driver-specific ioctl\n");
 903 }
 904
 905 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 906 {
 907         __u32 i;
 908
 909         /* zero the reserved fields */
 910         c->reserved[0] = c->reserved[1] = 0;
 911         for (i = 0; i < c->count; i++)
 912                 c->controls[i].reserved2[0] = 0;
 913
 914         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 915            when using extended controls.
 916            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 917            is it allowed for backwards compatibility.
 918          */
 919         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 920                 return 0;
 921         if (!c->which)
 922                 return 1;
 923         /* Check that all controls are from the same control class. */
 924         for (i = 0; i < c->count; i++) {
 925                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 926                         c->error_idx = i;
 927                         return 0;
 928                 }
 929         }
 930         return 1;
 931 }
 932
 933 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 934 {
 935         struct video_device *vfd = video_devdata(file);
 936         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 937         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 938         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 939         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 940         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 941         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 942         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 943
 944         if (ops == NULL)
 945                 return -EINVAL;
 946
 947         switch (type) {
 948         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 949                 if ((is_vid || is_tch) && is_rx &&
 950                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 954                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 958                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 962                 if (is_vid && is_tx &&
 963                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 964                         return 0;
 965                 break;
 966         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 967                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 968                         return 0;
 969                 break;
 970         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 971                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 972                         return 0;
 973                 break;
 974         case V4L2_BUF_TYPE_VBI_CAPTURE:
 975                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 976                         return 0;
 977                 break;
 978         case V4L2_BUF_TYPE_VBI_OUTPUT:
 979                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 980                         return 0;
 981                 break;
 982         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 983                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 984                         return 0;
 985                 break;
 986         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 987                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 988                         return 0;
 989                 break;
 990         case V4L2_BUF_TYPE_SDR_CAPTURE:
 991                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 992                         return 0;
 993                 break;
 994         case V4L2_BUF_TYPE_SDR_OUTPUT:
 995                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 996                         return 0;
 997                 break;
 998         case V4L2_BUF_TYPE_META_CAPTURE:
 999                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
1000                         return 0;
1001                 break;
1002         default:
1003                 break;
1004         }
1005         return -EINVAL;
1006 }
1007
1008 static void v4l_sanitize_format(struct v4l2_format *fmt)
1009 {
1010         unsigned int offset;
1011
1012         /*
1013          * The v4l2_pix_format structure has been extended with fields that were
1014          * not previously required to be set to zero by applications. The priv
1015          * field, when set to a magic value, indicates the the extended fields
1016          * are valid. Otherwise they will contain undefined values. To simplify
1017          * the API towards drivers zero the extended fields and set the priv
1018          * field to the magic value when the extended pixel format structure
1019          * isn't used by applications.
1020          */
1021
1022         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1023             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1024                 return;
1025
1026         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1027                 return;
1028
1029         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1030
1031         offset = offsetof(struct v4l2_pix_format, priv)
1032                + sizeof(fmt->fmt.pix.priv);
1033         memset(((void *)&fmt->fmt.pix) + offset, 0,
1034                sizeof(fmt->fmt.pix) - offset);
1035 }
1036
1037 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1038                                 struct file *file, void *fh, void *arg)
1039 {
1040         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1041         struct video_device *vfd = video_devdata(file);
1042         int ret;
1043
1044         cap->version = LINUX_VERSION_CODE;
1045         cap->device_caps = vfd->device_caps;
1046         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1047
1048         ret = ops->vidioc_querycap(file, fh, cap);
1049
1050         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1051         /*
1052          * Drivers MUST fill in device_caps, so check for this and
1053          * warn if it was forgotten.
1054          */
1055         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1056                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1057                 cap->driver, cap->capabilities, cap->device_caps);
1058         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1059
1060         return ret;
1061 }
1062
1063 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1064                                 struct file *file, void *fh, void *arg)
1065 {
1066         struct video_device *vfd = video_devdata(file);
1067         int ret;
1068
1069         ret = v4l_enable_media_source(vfd);
1070         if (ret)
1071                 return ret;
1072         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1073 }
1074
1075 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1076                                 struct file *file, void *fh, void *arg)
1077 {
1078         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1079 }
1080
1081 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1082                                 struct file *file, void *fh, void *arg)
1083 {
1084         struct video_device *vfd;
1085         u32 *p = arg;
1086
1087         vfd = video_devdata(file);
1088         *p = v4l2_prio_max(vfd->prio);
1089         return 0;
1090 }
1091
1092 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1093                                 struct file *file, void *fh, void *arg)
1094 {
1095         struct video_device *vfd;
1096         struct v4l2_fh *vfh;
1097         u32 *p = arg;
1098
1099         vfd = video_devdata(file);
1100         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1101                 return -ENOTTY;
1102         vfh = file->private_data;
1103         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1104 }
1105
1106 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1107                                 struct file *file, void *fh, void *arg)
1108 {
1109         struct video_device *vfd = video_devdata(file);
1110         struct v4l2_input *p = arg;
1111
1112         /*
1113          * We set the flags for CAP_DV_TIMINGS &
1114          * CAP_STD here based on ioctl handler provided by the
1115          * driver. If the driver doesn't support these
1116          * for a specific input, it must override these flags.
1117          */
1118         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1119                 p->capabilities |= V4L2_IN_CAP_STD;
1120
1121         return ops->vidioc_enum_input(file, fh, p);
1122 }
1123
1124 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1125                                 struct file *file, void *fh, void *arg)
1126 {
1127         struct video_device *vfd = video_devdata(file);
1128         struct v4l2_output *p = arg;
1129
1130         /*
1131          * We set the flags for CAP_DV_TIMINGS &
1132          * CAP_STD here based on ioctl handler provided by the
1133          * driver. If the driver doesn't support these
1134          * for a specific output, it must override these flags.
1135          */
1136         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1137                 p->capabilities |= V4L2_OUT_CAP_STD;
1138
1139         return ops->vidioc_enum_output(file, fh, p);
1140 }
1141
1142 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1143 {
1144         const unsigned sz = sizeof(fmt->description);
1145         const char *descr = NULL;
1146         u32 flags = 0;
1147
1148         /*
1149          * We depart from the normal coding style here since the descriptions
1150          * should be aligned so it is easy to see which descriptions will be
1151          * longer than 31 characters (the max length for a description).
1152          * And frankly, this is easier to read anyway.
1153          *
1154          * Note that gcc will use O(log N) comparisons to find the right case.
1155          */
1156         switch (fmt->pixelformat) {
1157         /* Max description length mask: descr = "0123456789012345678901234567890" */
1158         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1159         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1160         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1161         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1162         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1163         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1164         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1165         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1166         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1167         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1168         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1169         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1170         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1171         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1172         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1173         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1174         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1175         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1176         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1177         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1178         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1179         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1180         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1181         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1182         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1183         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1184         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1185         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1186         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1187         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1188         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1189         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1190         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1191         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1192         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1193         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1194         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1195         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1196         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1197         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1198         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1199         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1200         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1201         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1202         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1203         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1204         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1205         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1206         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1207         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1208         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1209         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1210         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1211         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1212         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1213         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1214         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1215         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1216         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1217         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1218         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1219         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1220         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1221         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1222         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1223         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1224         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1225         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1226         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1227         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1228         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1229         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1230         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1231         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1232         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1233         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1234         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1235         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1236         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1237         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1238         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1239         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1240         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1241         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1242         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1243         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1244         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1245         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1246         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1247         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1248         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1249         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1250         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1251         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1252         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1253         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1254         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1255         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1256         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1257         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1258         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1259         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1260         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1261         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1262         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1263         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1264         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1265         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1266         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1267         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1268         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1269         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1270         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1271         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1272         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1273         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1274         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1275         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1276         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1277         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1278         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1279         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1280         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1281         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1282         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1283         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1284         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1285         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1286         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1287         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1288         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1289         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1290         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1291         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1292         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1293         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1294         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1295         case V4L2_META_FMT_UVC:         descr = "UVC payload header metadata"; break;
1296
1297         default:
1298                 /* Compressed formats */
1299                 flags = V4L2_FMT_FLAG_COMPRESSED;
1300                 switch (fmt->pixelformat) {
1301                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1302                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1303                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1304                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1305                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1306                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1307                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1308                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1309                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1310                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1311                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1312                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1313                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1314                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1315                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1316                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1317                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1318                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1319                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1320                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1321                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1322                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1323                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1324                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1325                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1326                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1327                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1328                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1329                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1330                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1331                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1332                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1333                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1334                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1335                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1336                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1337                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1338                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1339                 default:
1340                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1341                         if (fmt->description[0])
1342                                 return;
1343                         flags = 0;
1344                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1345                                         (char)(fmt->pixelformat & 0x7f),
1346                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1347                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1348                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1349                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1350                         break;
1351                 }
1352         }
1353
1354         if (descr)
1355                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1356         fmt->flags = flags;
1357 }
1358
1359 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1360                                 struct file *file, void *fh, void *arg)
1361 {
1362         struct v4l2_fmtdesc *p = arg;
1363         int ret = check_fmt(file, p->type);
1364
1365         if (ret)
1366                 return ret;
1367         ret = -EINVAL;
1368
1369         switch (p->type) {
1370         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1371                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1372                         break;
1373                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1374                 break;
1375         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1376                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1377                         break;
1378                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1379                 break;
1380         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1381                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1382                         break;
1383                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1384                 break;
1385         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1386                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1387                         break;
1388                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1389                 break;
1390         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1391                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1392                         break;
1393                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1394                 break;
1395         case V4L2_BUF_TYPE_SDR_CAPTURE:
1396                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1397                         break;
1398                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1399                 break;
1400         case V4L2_BUF_TYPE_SDR_OUTPUT:
1401                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1402                         break;
1403                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1404                 break;
1405         case V4L2_BUF_TYPE_META_CAPTURE:
1406                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1407                         break;
1408                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1409                 break;
1410         }
1411         if (ret == 0)
1412                 v4l_fill_fmtdesc(p);
1413         return ret;
1414 }
1415
1416 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1417                                 struct file *file, void *fh, void *arg)
1418 {
1419         struct v4l2_format *p = arg;
1420         int ret = check_fmt(file, p->type);
1421
1422         if (ret)
1423                 return ret;
1424
1425         /*
1426          * fmt can't be cleared for these overlay types due to the 'clips'
1427          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1428          * Those are provided by the user. So handle these two overlay types
1429          * first, and then just do a simple memset for the other types.
1430          */
1431         switch (p->type) {
1432         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1433         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1434                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1435                 u32 clipcount = p->fmt.win.clipcount;
1436                 void __user *bitmap = p->fmt.win.bitmap;
1437
1438                 memset(&p->fmt, 0, sizeof(p->fmt));
1439                 p->fmt.win.clips = clips;
1440                 p->fmt.win.clipcount = clipcount;
1441                 p->fmt.win.bitmap = bitmap;
1442                 break;
1443         }
1444         default:
1445                 memset(&p->fmt, 0, sizeof(p->fmt));
1446                 break;
1447         }
1448
1449         switch (p->type) {
1450         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1451                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1452                         break;
1453                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1454                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1455                 /* just in case the driver zeroed it again */
1456                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1457                 return ret;
1458         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1459                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1460         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1461                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1462         case V4L2_BUF_TYPE_VBI_CAPTURE:
1463                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1464         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1465                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1466         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1467                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1468                         break;
1469                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1470                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1471                 /* just in case the driver zeroed it again */
1472                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1473                 return ret;
1474         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1475                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1476         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1477                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1478         case V4L2_BUF_TYPE_VBI_OUTPUT:
1479                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1480         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1481                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1482         case V4L2_BUF_TYPE_SDR_CAPTURE:
1483                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1484         case V4L2_BUF_TYPE_SDR_OUTPUT:
1485                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1486         case V4L2_BUF_TYPE_META_CAPTURE:
1487                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1488         }
1489         return -EINVAL;
1490 }
1491
1492 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1493 {
1494         /*
1495          * The v4l2_pix_format structure contains fields that make no sense for
1496          * touch. Set them to default values in this case.
1497          */
1498
1499         p->field = V4L2_FIELD_NONE;
1500         p->colorspace = V4L2_COLORSPACE_RAW;
1501         p->flags = 0;
1502         p->ycbcr_enc = 0;
1503         p->quantization = 0;
1504         p->xfer_func = 0;
1505 }
1506
1507 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1508                                 struct file *file, void *fh, void *arg)
1509 {
1510         struct v4l2_format *p = arg;
1511         struct video_device *vfd = video_devdata(file);
1512         int ret = check_fmt(file, p->type);
1513
1514         if (ret)
1515                 return ret;
1516
1517         ret = v4l_enable_media_source(vfd);
1518         if (ret)
1519                 return ret;
1520         v4l_sanitize_format(p);
1521
1522         switch (p->type) {
1523         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1524                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1525                         break;
1526                 CLEAR_AFTER_FIELD(p, fmt.pix);
1527                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1528                 /* just in case the driver zeroed it again */
1529                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1530                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1531                         v4l_pix_format_touch(&p->fmt.pix);
1532                 return ret;
1533         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1534                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1535                         break;
1536                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1537                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1538         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1539                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1540                         break;
1541                 CLEAR_AFTER_FIELD(p, fmt.win);
1542                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1543         case V4L2_BUF_TYPE_VBI_CAPTURE:
1544                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1545                         break;
1546                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1547                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1548         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1549                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1550                         break;
1551                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1552                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1553         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1554                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1555                         break;
1556                 CLEAR_AFTER_FIELD(p, fmt.pix);
1557                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1558                 /* just in case the driver zeroed it again */
1559                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1560                 return ret;
1561         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1562                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1563                         break;
1564                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1565                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1566         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1567                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1568                         break;
1569                 CLEAR_AFTER_FIELD(p, fmt.win);
1570                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1571         case V4L2_BUF_TYPE_VBI_OUTPUT:
1572                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1573                         break;
1574                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1575                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1576         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1577                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1578                         break;
1579                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1580                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1581         case V4L2_BUF_TYPE_SDR_CAPTURE:
1582                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1583                         break;
1584                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1585                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1586         case V4L2_BUF_TYPE_SDR_OUTPUT:
1587                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1588                         break;
1589                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1590                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1591         case V4L2_BUF_TYPE_META_CAPTURE:
1592                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1593                         break;
1594                 CLEAR_AFTER_FIELD(p, fmt.meta);
1595                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1596         }
1597         return -EINVAL;
1598 }
1599
1600 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1601                                 struct file *file, void *fh, void *arg)
1602 {
1603         struct v4l2_format *p = arg;
1604         int ret = check_fmt(file, p->type);
1605
1606         if (ret)
1607                 return ret;
1608
1609         v4l_sanitize_format(p);
1610
1611         switch (p->type) {
1612         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1613                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1614                         break;
1615                 CLEAR_AFTER_FIELD(p, fmt.pix);
1616                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1617                 /* just in case the driver zeroed it again */
1618                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1619                 return ret;
1620         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1621                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1622                         break;
1623                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1624                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1625         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1626                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1627                         break;
1628                 CLEAR_AFTER_FIELD(p, fmt.win);
1629                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1630         case V4L2_BUF_TYPE_VBI_CAPTURE:
1631                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1632                         break;
1633                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1634                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1635         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1636                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1637                         break;
1638                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1639                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1640         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1641                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1642                         break;
1643                 CLEAR_AFTER_FIELD(p, fmt.pix);
1644                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1645                 /* just in case the driver zeroed it again */
1646                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1647                 return ret;
1648         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1649                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1650                         break;
1651                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1652                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1653         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1654                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1655                         break;
1656                 CLEAR_AFTER_FIELD(p, fmt.win);
1657                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1658         case V4L2_BUF_TYPE_VBI_OUTPUT:
1659                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1660                         break;
1661                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1662                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1663         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1664                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1665                         break;
1666                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1667                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1668         case V4L2_BUF_TYPE_SDR_CAPTURE:
1669                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1670                         break;
1671                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1672                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1673         case V4L2_BUF_TYPE_SDR_OUTPUT:
1674                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1677                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1678         case V4L2_BUF_TYPE_META_CAPTURE:
1679                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1680                         break;
1681                 CLEAR_AFTER_FIELD(p, fmt.meta);
1682                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1683         }
1684         return -EINVAL;
1685 }
1686
1687 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1688                                 struct file *file, void *fh, void *arg)
1689 {
1690         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1691 }
1692
1693 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1694                                 struct file *file, void *fh, void *arg)
1695 {
1696         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1697 }
1698
1699 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1700                                 struct file *file, void *fh, void *arg)
1701 {
1702         struct video_device *vfd = video_devdata(file);
1703         struct v4l2_tuner *p = arg;
1704         int err;
1705
1706         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1707                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1708         err = ops->vidioc_g_tuner(file, fh, p);
1709         if (!err)
1710                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1711         return err;
1712 }
1713
1714 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1715                                 struct file *file, void *fh, void *arg)
1716 {
1717         struct video_device *vfd = video_devdata(file);
1718         struct v4l2_tuner *p = arg;
1719         int ret;
1720
1721         ret = v4l_enable_media_source(vfd);
1722         if (ret)
1723                 return ret;
1724         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1725                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1726         return ops->vidioc_s_tuner(file, fh, p);
1727 }
1728
1729 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1730                                 struct file *file, void *fh, void *arg)
1731 {
1732         struct video_device *vfd = video_devdata(file);
1733         struct v4l2_modulator *p = arg;
1734         int err;
1735
1736         if (vfd->vfl_type == VFL_TYPE_RADIO)
1737                 p->type = V4L2_TUNER_RADIO;
1738
1739         err = ops->vidioc_g_modulator(file, fh, p);
1740         if (!err)
1741                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1742         return err;
1743 }
1744
1745 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1746                                 struct file *file, void *fh, void *arg)
1747 {
1748         struct video_device *vfd = video_devdata(file);
1749         struct v4l2_modulator *p = arg;
1750
1751         if (vfd->vfl_type == VFL_TYPE_RADIO)
1752                 p->type = V4L2_TUNER_RADIO;
1753
1754         return ops->vidioc_s_modulator(file, fh, p);
1755 }
1756
1757 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1758                                 struct file *file, void *fh, void *arg)
1759 {
1760         struct video_device *vfd = video_devdata(file);
1761         struct v4l2_frequency *p = arg;
1762
1763         if (vfd->vfl_type == VFL_TYPE_SDR)
1764                 p->type = V4L2_TUNER_SDR;
1765         else
1766                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1767                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1768         return ops->vidioc_g_frequency(file, fh, p);
1769 }
1770
1771 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1772                                 struct file *file, void *fh, void *arg)
1773 {
1774         struct video_device *vfd = video_devdata(file);
1775         const struct v4l2_frequency *p = arg;
1776         enum v4l2_tuner_type type;
1777         int ret;
1778
1779         ret = v4l_enable_media_source(vfd);
1780         if (ret)
1781                 return ret;
1782         if (vfd->vfl_type == VFL_TYPE_SDR) {
1783                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1784                         return -EINVAL;
1785         } else {
1786                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1787                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1788                 if (type != p->type)
1789                         return -EINVAL;
1790         }
1791         return ops->vidioc_s_frequency(file, fh, p);
1792 }
1793
1794 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1795                                 struct file *file, void *fh, void *arg)
1796 {
1797         struct video_device *vfd = video_devdata(file);
1798         struct v4l2_standard *p = arg;
1799
1800         return v4l_video_std_enumstd(p, vfd->tvnorms);
1801 }
1802
1803 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1804                                 struct file *file, void *fh, void *arg)
1805 {
1806         struct video_device *vfd = video_devdata(file);
1807         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1808         int ret;
1809
1810         ret = v4l_enable_media_source(vfd);
1811         if (ret)
1812                 return ret;
1813         norm = id & vfd->tvnorms;
1814         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1815                 return -EINVAL;
1816
1817         /* Calls the specific handler */
1818         return ops->vidioc_s_std(file, fh, norm);
1819 }
1820
1821 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1822                                 struct file *file, void *fh, void *arg)
1823 {
1824         struct video_device *vfd = video_devdata(file);
1825         v4l2_std_id *p = arg;
1826         int ret;
1827
1828         ret = v4l_enable_media_source(vfd);
1829         if (ret)
1830                 return ret;
1831         /*
1832          * If no signal is detected, then the driver should return
1833          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1834          * any standards that do not apply removed.
1835          *
1836          * This means that tuners, audio and video decoders can join
1837          * their efforts to improve the standards detection.
1838          */
1839         *p = vfd->tvnorms;
1840         return ops->vidioc_querystd(file, fh, arg);
1841 }
1842
1843 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1844                                 struct file *file, void *fh, void *arg)
1845 {
1846         struct video_device *vfd = video_devdata(file);
1847         struct v4l2_hw_freq_seek *p = arg;
1848         enum v4l2_tuner_type type;
1849         int ret;
1850
1851         ret = v4l_enable_media_source(vfd);
1852         if (ret)
1853                 return ret;
1854         /* s_hw_freq_seek is not supported for SDR for now */
1855         if (vfd->vfl_type == VFL_TYPE_SDR)
1856                 return -EINVAL;
1857
1858         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1859                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1860         if (p->type != type)
1861                 return -EINVAL;
1862         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1863 }
1864
1865 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1866                                 struct file *file, void *fh, void *arg)
1867 {
1868         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1869 }
1870
1871 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1872                                 struct file *file, void *fh, void *arg)
1873 {
1874         struct v4l2_requestbuffers *p = arg;
1875         int ret = check_fmt(file, p->type);
1876
1877         if (ret)
1878                 return ret;
1879
1880         CLEAR_AFTER_FIELD(p, memory);
1881
1882         return ops->vidioc_reqbufs(file, fh, p);
1883 }
1884
1885 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1886                                 struct file *file, void *fh, void *arg)
1887 {
1888         struct v4l2_buffer *p = arg;
1889         int ret = check_fmt(file, p->type);
1890
1891         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1892 }
1893
1894 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1895                                 struct file *file, void *fh, void *arg)
1896 {
1897         struct v4l2_buffer *p = arg;
1898         int ret = check_fmt(file, p->type);
1899
1900         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1901 }
1902
1903 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1904                                 struct file *file, void *fh, void *arg)
1905 {
1906         struct v4l2_buffer *p = arg;
1907         int ret = check_fmt(file, p->type);
1908
1909         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1910 }
1911
1912 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1913                                 struct file *file, void *fh, void *arg)
1914 {
1915         struct v4l2_create_buffers *create = arg;
1916         int ret = check_fmt(file, create->format.type);
1917
1918         if (ret)
1919                 return ret;
1920
1921         CLEAR_AFTER_FIELD(create, format);
1922
1923         v4l_sanitize_format(&create->format);
1924
1925         ret = ops->vidioc_create_bufs(file, fh, create);
1926
1927         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1928             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1929                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1930
1931         return ret;
1932 }
1933
1934 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1935                                 struct file *file, void *fh, void *arg)
1936 {
1937         struct v4l2_buffer *b = arg;
1938         int ret = check_fmt(file, b->type);
1939
1940         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1941 }
1942
1943 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1944                                 struct file *file, void *fh, void *arg)
1945 {
1946         struct v4l2_streamparm *p = arg;
1947         v4l2_std_id std;
1948         int ret = check_fmt(file, p->type);
1949
1950         if (ret)
1951                 return ret;
1952         if (ops->vidioc_g_parm)
1953                 return ops->vidioc_g_parm(file, fh, p);
1954         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1955             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1956                 return -EINVAL;
1957         p->parm.capture.readbuffers = 2;
1958         ret = ops->vidioc_g_std(file, fh, &std);
1959         if (ret == 0)
1960                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1961         return ret;
1962 }
1963
1964 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1965                                 struct file *file, void *fh, void *arg)
1966 {
1967         struct v4l2_streamparm *p = arg;
1968         int ret = check_fmt(file, p->type);
1969
1970         if (ret)
1971                 return ret;
1972
1973         /* Note: extendedmode is never used in drivers */
1974         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
1975                 memset(p->parm.output.reserved, 0,
1976                        sizeof(p->parm.output.reserved));
1977                 p->parm.output.extendedmode = 0;
1978                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
1979         } else {
1980                 memset(p->parm.capture.reserved, 0,
1981                        sizeof(p->parm.capture.reserved));
1982                 p->parm.capture.extendedmode = 0;
1983                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
1984         }
1985         return ops->vidioc_s_parm(file, fh, p);
1986 }
1987
1988 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1989                                 struct file *file, void *fh, void *arg)
1990 {
1991         struct video_device *vfd = video_devdata(file);
1992         struct v4l2_queryctrl *p = arg;
1993         struct v4l2_fh *vfh =
1994                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1995
1996         if (vfh && vfh->ctrl_handler)
1997                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1998         if (vfd->ctrl_handler)
1999                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2000         if (ops->vidioc_queryctrl)
2001                 return ops->vidioc_queryctrl(file, fh, p);
2002         return -ENOTTY;
2003 }
2004
2005 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008         struct video_device *vfd = video_devdata(file);
2009         struct v4l2_query_ext_ctrl *p = arg;
2010         struct v4l2_fh *vfh =
2011                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2012
2013         if (vfh && vfh->ctrl_handler)
2014                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2015         if (vfd->ctrl_handler)
2016                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2017         if (ops->vidioc_query_ext_ctrl)
2018                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2019         return -ENOTTY;
2020 }
2021
2022 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2023                                 struct file *file, void *fh, void *arg)
2024 {
2025         struct video_device *vfd = video_devdata(file);
2026         struct v4l2_querymenu *p = arg;
2027         struct v4l2_fh *vfh =
2028                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2029
2030         if (vfh && vfh->ctrl_handler)
2031                 return v4l2_querymenu(vfh->ctrl_handler, p);
2032         if (vfd->ctrl_handler)
2033                 return v4l2_querymenu(vfd->ctrl_handler, p);
2034         if (ops->vidioc_querymenu)
2035                 return ops->vidioc_querymenu(file, fh, p);
2036         return -ENOTTY;
2037 }
2038
2039 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2040                                 struct file *file, void *fh, void *arg)
2041 {
2042         struct video_device *vfd = video_devdata(file);
2043         struct v4l2_control *p = arg;
2044         struct v4l2_fh *vfh =
2045                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2046         struct v4l2_ext_controls ctrls;
2047         struct v4l2_ext_control ctrl;
2048
2049         if (vfh && vfh->ctrl_handler)
2050                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2051         if (vfd->ctrl_handler)
2052                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2053         if (ops->vidioc_g_ctrl)
2054                 return ops->vidioc_g_ctrl(file, fh, p);
2055         if (ops->vidioc_g_ext_ctrls == NULL)
2056                 return -ENOTTY;
2057
2058         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2059         ctrls.count = 1;
2060         ctrls.controls = &ctrl;
2061         ctrl.id = p->id;
2062         ctrl.value = p->value;
2063         if (check_ext_ctrls(&ctrls, 1)) {
2064                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2065
2066                 if (ret == 0)
2067                         p->value = ctrl.value;
2068                 return ret;
2069         }
2070         return -EINVAL;
2071 }
2072
2073 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2074                                 struct file *file, void *fh, void *arg)
2075 {
2076         struct video_device *vfd = video_devdata(file);
2077         struct v4l2_control *p = arg;
2078         struct v4l2_fh *vfh =
2079                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2080         struct v4l2_ext_controls ctrls;
2081         struct v4l2_ext_control ctrl;
2082
2083         if (vfh && vfh->ctrl_handler)
2084                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2085         if (vfd->ctrl_handler)
2086                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2087         if (ops->vidioc_s_ctrl)
2088                 return ops->vidioc_s_ctrl(file, fh, p);
2089         if (ops->vidioc_s_ext_ctrls == NULL)
2090                 return -ENOTTY;
2091
2092         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2093         ctrls.count = 1;
2094         ctrls.controls = &ctrl;
2095         ctrl.id = p->id;
2096         ctrl.value = p->value;
2097         if (check_ext_ctrls(&ctrls, 1))
2098                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2099         return -EINVAL;
2100 }
2101
2102 static int v4l_g_ext_ctrls(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_ext_controls *p = arg;
2107         struct v4l2_fh *vfh =
2108                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2109
2110         p->error_idx = p->count;
2111         if (vfh && vfh->ctrl_handler)
2112                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2113         if (vfd->ctrl_handler)
2114                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2115         if (ops->vidioc_g_ext_ctrls == NULL)
2116                 return -ENOTTY;
2117         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2118                                         -EINVAL;
2119 }
2120
2121 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2122                                 struct file *file, void *fh, void *arg)
2123 {
2124         struct video_device *vfd = video_devdata(file);
2125         struct v4l2_ext_controls *p = arg;
2126         struct v4l2_fh *vfh =
2127                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2128
2129         p->error_idx = p->count;
2130         if (vfh && vfh->ctrl_handler)
2131                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2132         if (vfd->ctrl_handler)
2133                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2134         if (ops->vidioc_s_ext_ctrls == NULL)
2135                 return -ENOTTY;
2136         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2137                                         -EINVAL;
2138 }
2139
2140 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2141                                 struct file *file, void *fh, void *arg)
2142 {
2143         struct video_device *vfd = video_devdata(file);
2144         struct v4l2_ext_controls *p = arg;
2145         struct v4l2_fh *vfh =
2146                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2147
2148         p->error_idx = p->count;
2149         if (vfh && vfh->ctrl_handler)
2150                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2151         if (vfd->ctrl_handler)
2152                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2153         if (ops->vidioc_try_ext_ctrls == NULL)
2154                 return -ENOTTY;
2155         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2156                                         -EINVAL;
2157 }
2158
2159 /*
2160  * The selection API specified originally that the _MPLANE buffer types
2161  * shouldn't be used. The reasons for this are lost in the mists of time
2162  * (or just really crappy memories). Regardless, this is really annoying
2163  * for userspace. So to keep things simple we map _MPLANE buffer types
2164  * to their 'regular' counterparts before calling the driver. And we
2165  * restore it afterwards. This way applications can use either buffer
2166  * type and drivers don't need to check for both.
2167  */
2168 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2169                            struct file *file, void *fh, void *arg)
2170 {
2171         struct v4l2_selection *p = arg;
2172         u32 old_type = p->type;
2173         int ret;
2174
2175         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2176                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2177         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2178                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2179         ret = ops->vidioc_g_selection(file, fh, p);
2180         p->type = old_type;
2181         return ret;
2182 }
2183
2184 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2185                            struct file *file, void *fh, void *arg)
2186 {
2187         struct v4l2_selection *p = arg;
2188         u32 old_type = p->type;
2189         int ret;
2190
2191         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2192                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2193         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2194                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2195         ret = ops->vidioc_s_selection(file, fh, p);
2196         p->type = old_type;
2197         return ret;
2198 }
2199
2200 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2201                                 struct file *file, void *fh, void *arg)
2202 {
2203         struct v4l2_crop *p = arg;
2204         struct v4l2_selection s = {
2205                 .type = p->type,
2206         };
2207         int ret;
2208
2209         if (ops->vidioc_g_crop)
2210                 return ops->vidioc_g_crop(file, fh, p);
2211         /* simulate capture crop using selection api */
2212
2213         /* crop means compose for output devices */
2214         if (V4L2_TYPE_IS_OUTPUT(p->type))
2215                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2216         else
2217                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2218
2219         ret = v4l_g_selection(ops, file, fh, &s);
2220
2221         /* copying results to old structure on success */
2222         if (!ret)
2223                 p->c = s.r;
2224         return ret;
2225 }
2226
2227 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2228                                 struct file *file, void *fh, void *arg)
2229 {
2230         struct v4l2_crop *p = arg;
2231         struct v4l2_selection s = {
2232                 .type = p->type,
2233                 .r = p->c,
2234         };
2235
2236         if (ops->vidioc_s_crop)
2237                 return ops->vidioc_s_crop(file, fh, p);
2238         /* simulate capture crop using selection api */
2239
2240         /* crop means compose for output devices */
2241         if (V4L2_TYPE_IS_OUTPUT(p->type))
2242                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2243         else
2244                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2245
2246         return v4l_s_selection(ops, file, fh, &s);
2247 }
2248
2249 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2250                                 struct file *file, void *fh, void *arg)
2251 {
2252         struct v4l2_cropcap *p = arg;
2253         struct v4l2_selection s = { .type = p->type };
2254         int ret = 0;
2255
2256         /* setting trivial pixelaspect */
2257         p->pixelaspect.numerator = 1;
2258         p->pixelaspect.denominator = 1;
2259
2260         /*
2261          * The determine_valid_ioctls() call already should ensure
2262          * that this can never happen, but just in case...
2263          */
2264         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2265                 return -ENOTTY;
2266
2267         if (ops->vidioc_cropcap)
2268                 ret = ops->vidioc_cropcap(file, fh, p);
2269
2270         if (!ops->vidioc_g_selection)
2271                 return ret;
2272
2273         /*
2274          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2275          * square pixel aspect ratio in that case.
2276          */
2277         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2278                 return ret;
2279
2280         /* Use g_selection() to fill in the bounds and defrect rectangles */
2281
2282         /* obtaining bounds */
2283         if (V4L2_TYPE_IS_OUTPUT(p->type))
2284                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2285         else
2286                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2287
2288         ret = v4l_g_selection(ops, file, fh, &s);
2289         if (ret)
2290                 return ret;
2291         p->bounds = s.r;
2292
2293         /* obtaining defrect */
2294         if (V4L2_TYPE_IS_OUTPUT(p->type))
2295                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2296         else
2297                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2298
2299         ret = v4l_g_selection(ops, file, fh, &s);
2300         if (ret)
2301                 return ret;
2302         p->defrect = s.r;
2303
2304         return 0;
2305 }
2306
2307 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2308                                 struct file *file, void *fh, void *arg)
2309 {
2310         struct video_device *vfd = video_devdata(file);
2311         int ret;
2312
2313         if (vfd->v4l2_dev)
2314                 pr_info("%s: =================  START STATUS  =================\n",
2315                         vfd->v4l2_dev->name);
2316         ret = ops->vidioc_log_status(file, fh);
2317         if (vfd->v4l2_dev)
2318                 pr_info("%s: ==================  END STATUS  ==================\n",
2319                         vfd->v4l2_dev->name);
2320         return ret;
2321 }
2322
2323 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2324                                 struct file *file, void *fh, void *arg)
2325 {
2326 #ifdef CONFIG_VIDEO_ADV_DEBUG
2327         struct v4l2_dbg_register *p = arg;
2328         struct video_device *vfd = video_devdata(file);
2329         struct v4l2_subdev *sd;
2330         int idx = 0;
2331
2332         if (!capable(CAP_SYS_ADMIN))
2333                 return -EPERM;
2334         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2335                 if (vfd->v4l2_dev == NULL)
2336                         return -EINVAL;
2337                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2338                         if (p->match.addr == idx++)
2339                                 return v4l2_subdev_call(sd, core, g_register, p);
2340                 return -EINVAL;
2341         }
2342         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2343             (ops->vidioc_g_chip_info || p->match.addr == 0))
2344                 return ops->vidioc_g_register(file, fh, p);
2345         return -EINVAL;
2346 #else
2347         return -ENOTTY;
2348 #endif
2349 }
2350
2351 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2352                                 struct file *file, void *fh, void *arg)
2353 {
2354 #ifdef CONFIG_VIDEO_ADV_DEBUG
2355         const struct v4l2_dbg_register *p = arg;
2356         struct video_device *vfd = video_devdata(file);
2357         struct v4l2_subdev *sd;
2358         int idx = 0;
2359
2360         if (!capable(CAP_SYS_ADMIN))
2361                 return -EPERM;
2362         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2363                 if (vfd->v4l2_dev == NULL)
2364                         return -EINVAL;
2365                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2366                         if (p->match.addr == idx++)
2367                                 return v4l2_subdev_call(sd, core, s_register, p);
2368                 return -EINVAL;
2369         }
2370         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2371             (ops->vidioc_g_chip_info || p->match.addr == 0))
2372                 return ops->vidioc_s_register(file, fh, p);
2373         return -EINVAL;
2374 #else
2375         return -ENOTTY;
2376 #endif
2377 }
2378
2379 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2380                                 struct file *file, void *fh, void *arg)
2381 {
2382 #ifdef CONFIG_VIDEO_ADV_DEBUG
2383         struct video_device *vfd = video_devdata(file);
2384         struct v4l2_dbg_chip_info *p = arg;
2385         struct v4l2_subdev *sd;
2386         int idx = 0;
2387
2388         switch (p->match.type) {
2389         case V4L2_CHIP_MATCH_BRIDGE:
2390                 if (ops->vidioc_s_register)
2391                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2392                 if (ops->vidioc_g_register)
2393                         p->flags |= V4L2_CHIP_FL_READABLE;
2394                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2395                 if (ops->vidioc_g_chip_info)
2396                         return ops->vidioc_g_chip_info(file, fh, arg);
2397                 if (p->match.addr)
2398                         return -EINVAL;
2399                 return 0;
2400
2401         case V4L2_CHIP_MATCH_SUBDEV:
2402                 if (vfd->v4l2_dev == NULL)
2403                         break;
2404                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2405                         if (p->match.addr != idx++)
2406                                 continue;
2407                         if (sd->ops->core && sd->ops->core->s_register)
2408                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2409                         if (sd->ops->core && sd->ops->core->g_register)
2410                                 p->flags |= V4L2_CHIP_FL_READABLE;
2411                         strlcpy(p->name, sd->name, sizeof(p->name));
2412                         return 0;
2413                 }
2414                 break;
2415         }
2416         return -EINVAL;
2417 #else
2418         return -ENOTTY;
2419 #endif
2420 }
2421
2422 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2423                                 struct file *file, void *fh, void *arg)
2424 {
2425         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2426 }
2427
2428 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2429                                 struct file *file, void *fh, void *arg)
2430 {
2431         return ops->vidioc_subscribe_event(fh, arg);
2432 }
2433
2434 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2435                                 struct file *file, void *fh, void *arg)
2436 {
2437         return ops->vidioc_unsubscribe_event(fh, arg);
2438 }
2439
2440 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2441                                 struct file *file, void *fh, void *arg)
2442 {
2443         struct v4l2_sliced_vbi_cap *p = arg;
2444         int ret = check_fmt(file, p->type);
2445
2446         if (ret)
2447                 return ret;
2448
2449         /* Clear up to type, everything after type is zeroed already */
2450         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2451
2452         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2453 }
2454
2455 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2456                                 struct file *file, void *fh, void *arg)
2457 {
2458         struct video_device *vfd = video_devdata(file);
2459         struct v4l2_frequency_band *p = arg;
2460         enum v4l2_tuner_type type;
2461         int err;
2462
2463         if (vfd->vfl_type == VFL_TYPE_SDR) {
2464                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2465                         return -EINVAL;
2466                 type = p->type;
2467         } else {
2468                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2469                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2470                 if (type != p->type)
2471                         return -EINVAL;
2472         }
2473         if (ops->vidioc_enum_freq_bands) {
2474                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2475                 if (err != -ENOTTY)
2476                         return err;
2477         }
2478         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2479                 struct v4l2_tuner t = {
2480                         .index = p->tuner,
2481                         .type = type,
2482                 };
2483
2484                 if (p->index)
2485                         return -EINVAL;
2486                 err = ops->vidioc_g_tuner(file, fh, &t);
2487                 if (err)
2488                         return err;
2489                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2490                 p->rangelow = t.rangelow;
2491                 p->rangehigh = t.rangehigh;
2492                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2493                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2494                 return 0;
2495         }
2496         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2497                 struct v4l2_modulator m = {
2498                         .index = p->tuner,
2499                 };
2500
2501                 if (type != V4L2_TUNER_RADIO)
2502                         return -EINVAL;
2503                 if (p->index)
2504                         return -EINVAL;
2505                 err = ops->vidioc_g_modulator(file, fh, &m);
2506                 if (err)
2507                         return err;
2508                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2509                 p->rangelow = m.rangelow;
2510                 p->rangehigh = m.rangehigh;
2511                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2512                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2513                 return 0;
2514         }
2515         return -ENOTTY;
2516 }
2517
2518 struct v4l2_ioctl_info {
2519         unsigned int ioctl;
2520         u32 flags;
2521         const char * const name;
2522         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2523                     void *fh, void *p);
2524         void (*debug)(const void *arg, bool write_only);
2525 };
2526
2527 /* This control needs a priority check */
2528 #define INFO_FL_PRIO            (1 << 0)
2529 /* This control can be valid if the filehandle passes a control handler. */
2530 #define INFO_FL_CTRL            (1 << 1)
2531 /* Queuing ioctl */
2532 #define INFO_FL_QUEUE           (1 << 2)
2533 /* Always copy back result, even on error */
2534 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2535 /* Zero struct from after the field to the end */
2536 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2537         ((offsetof(struct v4l2_struct, field) +                 \
2538           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2539 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2540
2541 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2542         static int v4l_stub_ ## _vidioc(                        \
2543                         const struct v4l2_ioctl_ops *ops,       \
2544                         struct file *file, void *fh, void *p)   \
2545         {                                                       \
2546                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2547         }
2548
2549 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2550         [_IOC_NR(_ioctl)] = {                                   \
2551                 .ioctl = _ioctl,                                \
2552                 .flags = _flags,                                \
2553                 .name = #_ioctl,                                \
2554                 .func = _func,                                  \
2555                 .debug = _debug,                                \
2556         }
2557
2558 DEFINE_V4L_STUB_FUNC(g_fbuf)
2559 DEFINE_V4L_STUB_FUNC(s_fbuf)
2560 DEFINE_V4L_STUB_FUNC(expbuf)
2561 DEFINE_V4L_STUB_FUNC(g_std)
2562 DEFINE_V4L_STUB_FUNC(g_audio)
2563 DEFINE_V4L_STUB_FUNC(s_audio)
2564 DEFINE_V4L_STUB_FUNC(g_input)
2565 DEFINE_V4L_STUB_FUNC(g_edid)
2566 DEFINE_V4L_STUB_FUNC(s_edid)
2567 DEFINE_V4L_STUB_FUNC(g_output)
2568 DEFINE_V4L_STUB_FUNC(g_audout)
2569 DEFINE_V4L_STUB_FUNC(s_audout)
2570 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2571 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2572 DEFINE_V4L_STUB_FUNC(enumaudio)
2573 DEFINE_V4L_STUB_FUNC(enumaudout)
2574 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2575 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2576 DEFINE_V4L_STUB_FUNC(g_enc_index)
2577 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2578 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2579 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2580 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2581 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2582 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2583 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2584 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2585 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2586
2587 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2588         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2589         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2590         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2591         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2592         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2593         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2594         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2595         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2596         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2597         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2598         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2599         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2600         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2601         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2602         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2603         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2604         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2605         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2606         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2607         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2608         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2609         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2610         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2611         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2612         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2613         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2614         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2615         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2616         IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2617         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2618         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2619         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2620         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2621         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2622         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2623         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2624         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2625         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2626         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2627         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2628         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2629         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2630         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2631         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2632         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2633         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2634         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2635         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2636         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2637         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2638         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2639         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2640         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2641         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2642         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)),
2643         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2644         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2645         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2646         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2647         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2648         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2649         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2650         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2651         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2652         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2653         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2654         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2655         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2656         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2657         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)),
2658         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2659         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2660         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2661         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2662         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2663         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2664         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2665         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2666         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2667         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2668         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)),
2669         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)),
2670 };
2671 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2672
2673 static bool v4l2_is_known_ioctl(unsigned int cmd)
2674 {
2675         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2676                 return false;
2677         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2678 }
2679
2680 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2681 static bool v4l2_ioctl_m2m_queue_is_output(unsigned int cmd, void *arg)
2682 {
2683         switch (cmd) {
2684         case VIDIOC_CREATE_BUFS: {
2685                 struct v4l2_create_buffers *cbufs = arg;
2686
2687                 return V4L2_TYPE_IS_OUTPUT(cbufs->format.type);
2688         }
2689         case VIDIOC_REQBUFS: {
2690                 struct v4l2_requestbuffers *rbufs = arg;
2691
2692                 return V4L2_TYPE_IS_OUTPUT(rbufs->type);
2693         }
2694         case VIDIOC_QBUF:
2695         case VIDIOC_DQBUF:
2696         case VIDIOC_QUERYBUF:
2697         case VIDIOC_PREPARE_BUF: {
2698                 struct v4l2_buffer *buf = arg;
2699
2700                 return V4L2_TYPE_IS_OUTPUT(buf->type);
2701         }
2702         case VIDIOC_EXPBUF: {
2703                 struct v4l2_exportbuffer *expbuf = arg;
2704
2705                 return V4L2_TYPE_IS_OUTPUT(expbuf->type);
2706         }
2707         case VIDIOC_STREAMON:
2708         case VIDIOC_STREAMOFF: {
2709                 int *type = arg;
2710
2711                 return V4L2_TYPE_IS_OUTPUT(*type);
2712         }
2713         default:
2714                 return false;
2715         }
2716 }
2717 #endif
2718
2719 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2720                                          struct v4l2_fh *vfh, unsigned int cmd,
2721                                          void *arg)
2722 {
2723         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2724                 return vdev->lock;
2725 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2726         if (vfh && vfh->m2m_ctx &&
2727             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2728                 bool is_output = v4l2_ioctl_m2m_queue_is_output(cmd, arg);
2729                 struct v4l2_m2m_queue_ctx *ctx = is_output ?
2730                         &vfh->m2m_ctx->out_q_ctx : &vfh->m2m_ctx->cap_q_ctx;
2731
2732                 if (ctx->q.lock)
2733                         return ctx->q.lock;
2734         }
2735 #endif
2736         if (vdev->queue && vdev->queue->lock &&
2737                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2738                 return vdev->queue->lock;
2739         return vdev->lock;
2740 }
2741
2742 /* Common ioctl debug function. This function can be used by
2743    external ioctl messages as well as internal V4L ioctl */
2744 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2745 {
2746         const char *dir, *type;
2747
2748         if (prefix)
2749                 printk(KERN_DEBUG "%s: ", prefix);
2750
2751         switch (_IOC_TYPE(cmd)) {
2752         case 'd':
2753                 type = "v4l2_int";
2754                 break;
2755         case 'V':
2756                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2757                         type = "v4l2";
2758                         break;
2759                 }
2760                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2761                 return;
2762         default:
2763                 type = "unknown";
2764                 break;
2765         }
2766
2767         switch (_IOC_DIR(cmd)) {
2768         case _IOC_NONE:              dir = "--"; break;
2769         case _IOC_READ:              dir = "r-"; break;
2770         case _IOC_WRITE:             dir = "-w"; break;
2771         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2772         default:                     dir = "*ERR*"; break;
2773         }
2774         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2775                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2776 }
2777 EXPORT_SYMBOL(v4l_printk_ioctl);
2778
2779 static long __video_do_ioctl(struct file *file,
2780                 unsigned int cmd, void *arg)
2781 {
2782         struct video_device *vfd = video_devdata(file);
2783         struct mutex *lock; /* ioctl serialization mutex */
2784         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2785         bool write_only = false;
2786         struct v4l2_ioctl_info default_info;
2787         const struct v4l2_ioctl_info *info;
2788         void *fh = file->private_data;
2789         struct v4l2_fh *vfh = NULL;
2790         int dev_debug = vfd->dev_debug;
2791         long ret = -ENOTTY;
2792
2793         if (ops == NULL) {
2794                 pr_warn("%s: has no ioctl_ops.\n",
2795                                 video_device_node_name(vfd));
2796                 return ret;
2797         }
2798
2799         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2800                 vfh = file->private_data;
2801
2802         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2803
2804         if (lock && mutex_lock_interruptible(lock))
2805                 return -ERESTARTSYS;
2806
2807         if (!video_is_registered(vfd)) {
2808                 ret = -ENODEV;
2809                 goto unlock;
2810         }
2811
2812         if (v4l2_is_known_ioctl(cmd)) {
2813                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2814
2815                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2816                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2817                         goto done;
2818
2819                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2820                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2821                         if (ret)
2822                                 goto done;
2823                 }
2824         } else {
2825                 default_info.ioctl = cmd;
2826                 default_info.flags = 0;
2827                 default_info.debug = v4l_print_default;
2828                 info = &default_info;
2829         }
2830
2831         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2832         if (info != &default_info) {
2833                 ret = info->func(ops, file, fh, arg);
2834         } else if (!ops->vidioc_default) {
2835                 ret = -ENOTTY;
2836         } else {
2837                 ret = ops->vidioc_default(file, fh,
2838                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2839                         cmd, arg);
2840         }
2841
2842 done:
2843         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2844                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2845                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2846                         goto unlock;
2847
2848                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2849                 if (ret < 0)
2850                         pr_cont(": error %ld", ret);
2851                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2852                         pr_cont("\n");
2853                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2854                         info->debug(arg, write_only);
2855                 else {
2856                         pr_cont(": ");
2857                         info->debug(arg, write_only);
2858                 }
2859         }
2860
2861 unlock:
2862         if (lock)
2863                 mutex_unlock(lock);
2864         return ret;
2865 }
2866
2867 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2868                             void __user **user_ptr, void ***kernel_ptr)
2869 {
2870         int ret = 0;
2871
2872         switch (cmd) {
2873         case VIDIOC_PREPARE_BUF:
2874         case VIDIOC_QUERYBUF:
2875         case VIDIOC_QBUF:
2876         case VIDIOC_DQBUF: {
2877                 struct v4l2_buffer *buf = parg;
2878
2879                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2880                         if (buf->length > VIDEO_MAX_PLANES) {
2881                                 ret = -EINVAL;
2882                                 break;
2883                         }
2884                         *user_ptr = (void __user *)buf->m.planes;
2885                         *kernel_ptr = (void **)&buf->m.planes;
2886                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2887                         ret = 1;
2888                 }
2889                 break;
2890         }
2891
2892         case VIDIOC_G_EDID:
2893         case VIDIOC_S_EDID: {
2894                 struct v4l2_edid *edid = parg;
2895
2896                 if (edid->blocks) {
2897                         if (edid->blocks > 256) {
2898                                 ret = -EINVAL;
2899                                 break;
2900                         }
2901                         *user_ptr = (void __user *)edid->edid;
2902                         *kernel_ptr = (void **)&edid->edid;
2903                         *array_size = edid->blocks * 128;
2904                         ret = 1;
2905                 }
2906                 break;
2907         }
2908
2909         case VIDIOC_S_EXT_CTRLS:
2910         case VIDIOC_G_EXT_CTRLS:
2911         case VIDIOC_TRY_EXT_CTRLS: {
2912                 struct v4l2_ext_controls *ctrls = parg;
2913
2914                 if (ctrls->count != 0) {
2915                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2916                                 ret = -EINVAL;
2917                                 break;
2918                         }
2919                         *user_ptr = (void __user *)ctrls->controls;
2920                         *kernel_ptr = (void **)&ctrls->controls;
2921                         *array_size = sizeof(struct v4l2_ext_control)
2922                                     * ctrls->count;
2923                         ret = 1;
2924                 }
2925                 break;
2926         }
2927         }
2928
2929         return ret;
2930 }
2931
2932 long
2933 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2934                v4l2_kioctl func)
2935 {
2936         char    sbuf[128];
2937         void    *mbuf = NULL;
2938         void    *parg = (void *)arg;
2939         long    err  = -EINVAL;
2940         bool    has_array_args;
2941         bool    always_copy = false;
2942         size_t  array_size = 0;
2943         void __user *user_ptr = NULL;
2944         void    **kernel_ptr = NULL;
2945         const size_t ioc_size = _IOC_SIZE(cmd);
2946
2947         /*  Copy arguments into temp kernel buffer  */
2948         if (_IOC_DIR(cmd) != _IOC_NONE) {
2949                 if (ioc_size <= sizeof(sbuf)) {
2950                         parg = sbuf;
2951                 } else {
2952                         /* too big to allocate from stack */
2953                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
2954                         if (NULL == mbuf)
2955                                 return -ENOMEM;
2956                         parg = mbuf;
2957                 }
2958
2959                 err = -EFAULT;
2960                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2961                         unsigned int n = ioc_size;
2962
2963                         /*
2964                          * In some cases, only a few fields are used as input,
2965                          * i.e. when the app sets "index" and then the driver
2966                          * fills in the rest of the structure for the thing
2967                          * with that index.  We only need to copy up the first
2968                          * non-input field.
2969                          */
2970                         if (v4l2_is_known_ioctl(cmd)) {
2971                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2972
2973                                 if (flags & INFO_FL_CLEAR_MASK)
2974                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2975                                 always_copy = flags & INFO_FL_ALWAYS_COPY;
2976                         }
2977
2978                         if (copy_from_user(parg, (void __user *)arg, n))
2979                                 goto out;
2980
2981                         /* zero out anything we don't copy from userspace */
2982                         if (n < ioc_size)
2983                                 memset((u8 *)parg + n, 0, ioc_size - n);
2984                 } else {
2985                         /* read-only ioctl */
2986                         memset(parg, 0, ioc_size);
2987                 }
2988         }
2989
2990         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2991         if (err < 0)
2992                 goto out;
2993         has_array_args = err;
2994
2995         if (has_array_args) {
2996                 /*
2997                  * When adding new types of array args, make sure that the
2998                  * parent argument to ioctl (which contains the pointer to the
2999                  * array) fits into sbuf (so that mbuf will still remain
3000                  * unused up to here).
3001                  */
3002                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3003                 err = -ENOMEM;
3004                 if (NULL == mbuf)
3005                         goto out_array_args;
3006                 err = -EFAULT;
3007                 if (copy_from_user(mbuf, user_ptr, array_size))
3008                         goto out_array_args;
3009                 *kernel_ptr = mbuf;
3010         }
3011
3012         /* Handles IOCTL */
3013         err = func(file, cmd, parg);
3014         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3015                 err = -ENOTTY;
3016                 goto out;
3017         }
3018
3019         if (err == 0) {
3020                 if (cmd == VIDIOC_DQBUF)
3021                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3022                 else if (cmd == VIDIOC_QBUF)
3023                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3024         }
3025
3026         if (has_array_args) {
3027                 *kernel_ptr = (void __force *)user_ptr;
3028                 if (copy_to_user(user_ptr, mbuf, array_size))
3029                         err = -EFAULT;
3030                 goto out_array_args;
3031         }
3032         /*
3033          * Some ioctls can return an error, but still have valid
3034          * results that must be returned.
3035          */
3036         if (err < 0 && !always_copy)
3037                 goto out;
3038
3039 out_array_args:
3040         /*  Copy results into user buffer  */
3041         switch (_IOC_DIR(cmd)) {
3042         case _IOC_READ:
3043         case (_IOC_WRITE | _IOC_READ):
3044                 if (copy_to_user((void __user *)arg, parg, ioc_size))
3045                         err = -EFAULT;
3046                 break;
3047         }
3048
3049 out:
3050         kvfree(mbuf);
3051         return err;
3052 }
3053
3054 long video_ioctl2(struct file *file,
3055                unsigned int cmd, unsigned long arg)
3056 {
3057         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3058 }
3059 EXPORT_SYMBOL(video_ioctl2);