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         u32 planes;
 290         unsigned i;
 291
 292         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 293         switch (p->type) {
 294         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 295         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 296                 pix = &p->fmt.pix;
 297                 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",
 298                         pix->width, pix->height,
 299                         (pix->pixelformat & 0xff),
 300                         (pix->pixelformat >>  8) & 0xff,
 301                         (pix->pixelformat >> 16) & 0xff,
 302                         (pix->pixelformat >> 24) & 0xff,
 303                         prt_names(pix->field, v4l2_field_names),
 304                         pix->bytesperline, pix->sizeimage,
 305                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 306                         pix->quantization, pix->xfer_func);
 307                 break;
 308         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 309         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 310                 mp = &p->fmt.pix_mp;
 311                 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",
 312                         mp->width, mp->height,
 313                         (mp->pixelformat & 0xff),
 314                         (mp->pixelformat >>  8) & 0xff,
 315                         (mp->pixelformat >> 16) & 0xff,
 316                         (mp->pixelformat >> 24) & 0xff,
 317                         prt_names(mp->field, v4l2_field_names),
 318                         mp->colorspace, mp->num_planes, mp->flags,
 319                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 320                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 321                 for (i = 0; i < planes; i++)
 322                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 323                                         mp->plane_fmt[i].bytesperline,
 324                                         mp->plane_fmt[i].sizeimage);
 325                 break;
 326         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 327         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 328                 win = &p->fmt.win;
 329                 /* Note: we can't print the clip list here since the clips
 330                  * pointer is a userspace pointer, not a kernelspace
 331                  * pointer. */
 332                 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",
 333                         win->w.width, win->w.height, win->w.left, win->w.top,
 334                         prt_names(win->field, v4l2_field_names),
 335                         win->chromakey, win->clipcount, win->clips,
 336                         win->bitmap, win->global_alpha);
 337                 break;
 338         case V4L2_BUF_TYPE_VBI_CAPTURE:
 339         case V4L2_BUF_TYPE_VBI_OUTPUT:
 340                 vbi = &p->fmt.vbi;
 341                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 342                         vbi->sampling_rate, vbi->offset,
 343                         vbi->samples_per_line,
 344                         (vbi->sample_format & 0xff),
 345                         (vbi->sample_format >>  8) & 0xff,
 346                         (vbi->sample_format >> 16) & 0xff,
 347                         (vbi->sample_format >> 24) & 0xff,
 348                         vbi->start[0], vbi->start[1],
 349                         vbi->count[0], vbi->count[1]);
 350                 break;
 351         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 352         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 353                 sliced = &p->fmt.sliced;
 354                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 355                                 sliced->service_set, sliced->io_size);
 356                 for (i = 0; i < 24; i++)
 357                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 358                                 sliced->service_lines[0][i],
 359                                 sliced->service_lines[1][i]);
 360                 break;
 361         case V4L2_BUF_TYPE_SDR_CAPTURE:
 362         case V4L2_BUF_TYPE_SDR_OUTPUT:
 363                 sdr = &p->fmt.sdr;
 364                 pr_cont(", pixelformat=%c%c%c%c\n",
 365                         (sdr->pixelformat >>  0) & 0xff,
 366                         (sdr->pixelformat >>  8) & 0xff,
 367                         (sdr->pixelformat >> 16) & 0xff,
 368                         (sdr->pixelformat >> 24) & 0xff);
 369                 break;
 370         case V4L2_BUF_TYPE_META_CAPTURE:
 371                 meta = &p->fmt.meta;
 372                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 373                         (meta->dataformat >>  0) & 0xff,
 374                         (meta->dataformat >>  8) & 0xff,
 375                         (meta->dataformat >> 16) & 0xff,
 376                         (meta->dataformat >> 24) & 0xff,
 377                         meta->buffersize);
 378                 break;
 379         }
 380 }
 381
 382 static void v4l_print_framebuffer(const void *arg, bool write_only)
 383 {
 384         const struct v4l2_framebuffer *p = arg;
 385
 386         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",
 387                         p->capability, p->flags, p->base,
 388                         p->fmt.width, p->fmt.height,
 389                         (p->fmt.pixelformat & 0xff),
 390                         (p->fmt.pixelformat >>  8) & 0xff,
 391                         (p->fmt.pixelformat >> 16) & 0xff,
 392                         (p->fmt.pixelformat >> 24) & 0xff,
 393                         p->fmt.bytesperline, p->fmt.sizeimage,
 394                         p->fmt.colorspace);
 395 }
 396
 397 static void v4l_print_buftype(const void *arg, bool write_only)
 398 {
 399         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 400 }
 401
 402 static void v4l_print_modulator(const void *arg, bool write_only)
 403 {
 404         const struct v4l2_modulator *p = arg;
 405
 406         if (write_only)
 407                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 408         else
 409                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 410                         p->index, (int)sizeof(p->name), p->name, p->capability,
 411                         p->rangelow, p->rangehigh, p->txsubchans);
 412 }
 413
 414 static void v4l_print_tuner(const void *arg, bool write_only)
 415 {
 416         const struct v4l2_tuner *p = arg;
 417
 418         if (write_only)
 419                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 420         else
 421                 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",
 422                         p->index, (int)sizeof(p->name), p->name, p->type,
 423                         p->capability, p->rangelow,
 424                         p->rangehigh, p->signal, p->afc,
 425                         p->rxsubchans, p->audmode);
 426 }
 427
 428 static void v4l_print_frequency(const void *arg, bool write_only)
 429 {
 430         const struct v4l2_frequency *p = arg;
 431
 432         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 433                                 p->tuner, p->type, p->frequency);
 434 }
 435
 436 static void v4l_print_standard(const void *arg, bool write_only)
 437 {
 438         const struct v4l2_standard *p = arg;
 439
 440         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 441                 p->index,
 442                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 443                 p->frameperiod.numerator,
 444                 p->frameperiod.denominator,
 445                 p->framelines);
 446 }
 447
 448 static void v4l_print_std(const void *arg, bool write_only)
 449 {
 450         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 451 }
 452
 453 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 454 {
 455         const struct v4l2_hw_freq_seek *p = arg;
 456
 457         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 458                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 459                 p->rangelow, p->rangehigh);
 460 }
 461
 462 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 463 {
 464         const struct v4l2_requestbuffers *p = arg;
 465
 466         pr_cont("count=%d, type=%s, memory=%s\n",
 467                 p->count,
 468                 prt_names(p->type, v4l2_type_names),
 469                 prt_names(p->memory, v4l2_memory_names));
 470 }
 471
 472 static void v4l_print_buffer(const void *arg, bool write_only)
 473 {
 474         const struct v4l2_buffer *p = arg;
 475         const struct v4l2_timecode *tc = &p->timecode;
 476         const struct v4l2_plane *plane;
 477         int i;
 478
 479         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 480                         p->timestamp.tv_sec / 3600,
 481                         (int)(p->timestamp.tv_sec / 60) % 60,
 482                         (int)(p->timestamp.tv_sec % 60),
 483                         (long)p->timestamp.tv_usec,
 484                         p->index,
 485                         prt_names(p->type, v4l2_type_names),
 486                         p->flags, prt_names(p->field, v4l2_field_names),
 487                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 488
 489         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 490                 pr_cont("\n");
 491                 for (i = 0; i < p->length; ++i) {
 492                         plane = &p->m.planes[i];
 493                         printk(KERN_DEBUG
 494                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 495                                 i, plane->bytesused, plane->data_offset,
 496                                 plane->m.userptr, plane->length);
 497                 }
 498         } else {
 499                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 500                         p->bytesused, p->m.userptr, p->length);
 501         }
 502
 503         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 504                         tc->hours, tc->minutes, tc->seconds,
 505                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 506 }
 507
 508 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 509 {
 510         const struct v4l2_exportbuffer *p = arg;
 511
 512         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 513                 p->fd, prt_names(p->type, v4l2_type_names),
 514                 p->index, p->plane, p->flags);
 515 }
 516
 517 static void v4l_print_create_buffers(const void *arg, bool write_only)
 518 {
 519         const struct v4l2_create_buffers *p = arg;
 520
 521         pr_cont("index=%d, count=%d, memory=%s, ",
 522                         p->index, p->count,
 523                         prt_names(p->memory, v4l2_memory_names));
 524         v4l_print_format(&p->format, write_only);
 525 }
 526
 527 static void v4l_print_streamparm(const void *arg, bool write_only)
 528 {
 529         const struct v4l2_streamparm *p = arg;
 530
 531         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 532
 533         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 534             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 535                 const struct v4l2_captureparm *c = &p->parm.capture;
 536
 537                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 538                         c->capability, c->capturemode,
 539                         c->timeperframe.numerator, c->timeperframe.denominator,
 540                         c->extendedmode, c->readbuffers);
 541         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 542                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 543                 const struct v4l2_outputparm *c = &p->parm.output;
 544
 545                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 546                         c->capability, c->outputmode,
 547                         c->timeperframe.numerator, c->timeperframe.denominator,
 548                         c->extendedmode, c->writebuffers);
 549         } else {
 550                 pr_cont("\n");
 551         }
 552 }
 553
 554 static void v4l_print_queryctrl(const void *arg, bool write_only)
 555 {
 556         const struct v4l2_queryctrl *p = arg;
 557
 558         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 559                         p->id, p->type, (int)sizeof(p->name), p->name,
 560                         p->minimum, p->maximum,
 561                         p->step, p->default_value, p->flags);
 562 }
 563
 564 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 565 {
 566         const struct v4l2_query_ext_ctrl *p = arg;
 567
 568         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",
 569                         p->id, p->type, (int)sizeof(p->name), p->name,
 570                         p->minimum, p->maximum,
 571                         p->step, p->default_value, p->flags,
 572                         p->elem_size, p->elems, p->nr_of_dims,
 573                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 574 }
 575
 576 static void v4l_print_querymenu(const void *arg, bool write_only)
 577 {
 578         const struct v4l2_querymenu *p = arg;
 579
 580         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 581 }
 582
 583 static void v4l_print_control(const void *arg, bool write_only)
 584 {
 585         const struct v4l2_control *p = arg;
 586
 587         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 588 }
 589
 590 static void v4l_print_ext_controls(const void *arg, bool write_only)
 591 {
 592         const struct v4l2_ext_controls *p = arg;
 593         int i;
 594
 595         pr_cont("which=0x%x, count=%d, error_idx=%d",
 596                         p->which, p->count, p->error_idx);
 597         for (i = 0; i < p->count; i++) {
 598                 if (!p->controls[i].size)
 599                         pr_cont(", id/val=0x%x/0x%x",
 600                                 p->controls[i].id, p->controls[i].value);
 601                 else
 602                         pr_cont(", id/size=0x%x/%u",
 603                                 p->controls[i].id, p->controls[i].size);
 604         }
 605         pr_cont("\n");
 606 }
 607
 608 static void v4l_print_cropcap(const void *arg, bool write_only)
 609 {
 610         const struct v4l2_cropcap *p = arg;
 611
 612         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 613                 prt_names(p->type, v4l2_type_names),
 614                 p->bounds.width, p->bounds.height,
 615                 p->bounds.left, p->bounds.top,
 616                 p->defrect.width, p->defrect.height,
 617                 p->defrect.left, p->defrect.top,
 618                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 619 }
 620
 621 static void v4l_print_crop(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_crop *p = arg;
 624
 625         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 626                 prt_names(p->type, v4l2_type_names),
 627                 p->c.width, p->c.height,
 628                 p->c.left, p->c.top);
 629 }
 630
 631 static void v4l_print_selection(const void *arg, bool write_only)
 632 {
 633         const struct v4l2_selection *p = arg;
 634
 635         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 636                 prt_names(p->type, v4l2_type_names),
 637                 p->target, p->flags,
 638                 p->r.width, p->r.height, p->r.left, p->r.top);
 639 }
 640
 641 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 642 {
 643         const struct v4l2_jpegcompression *p = arg;
 644
 645         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 646                 p->quality, p->APPn, p->APP_len,
 647                 p->COM_len, p->jpeg_markers);
 648 }
 649
 650 static void v4l_print_enc_idx(const void *arg, bool write_only)
 651 {
 652         const struct v4l2_enc_idx *p = arg;
 653
 654         pr_cont("entries=%d, entries_cap=%d\n",
 655                         p->entries, p->entries_cap);
 656 }
 657
 658 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 659 {
 660         const struct v4l2_encoder_cmd *p = arg;
 661
 662         pr_cont("cmd=%d, flags=0x%x\n",
 663                         p->cmd, p->flags);
 664 }
 665
 666 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 667 {
 668         const struct v4l2_decoder_cmd *p = arg;
 669
 670         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 671
 672         if (p->cmd == V4L2_DEC_CMD_START)
 673                 pr_info("speed=%d, format=%u\n",
 674                                 p->start.speed, p->start.format);
 675         else if (p->cmd == V4L2_DEC_CMD_STOP)
 676                 pr_info("pts=%llu\n", p->stop.pts);
 677 }
 678
 679 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 680 {
 681         const struct v4l2_dbg_chip_info *p = arg;
 682
 683         pr_cont("type=%u, ", p->match.type);
 684         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 685                 pr_cont("name=%.*s, ",
 686                                 (int)sizeof(p->match.name), p->match.name);
 687         else
 688                 pr_cont("addr=%u, ", p->match.addr);
 689         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 690 }
 691
 692 static void v4l_print_dbg_register(const void *arg, bool write_only)
 693 {
 694         const struct v4l2_dbg_register *p = arg;
 695
 696         pr_cont("type=%u, ", p->match.type);
 697         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 698                 pr_cont("name=%.*s, ",
 699                                 (int)sizeof(p->match.name), p->match.name);
 700         else
 701                 pr_cont("addr=%u, ", p->match.addr);
 702         pr_cont("reg=0x%llx, val=0x%llx\n",
 703                         p->reg, p->val);
 704 }
 705
 706 static void v4l_print_dv_timings(const void *arg, bool write_only)
 707 {
 708         const struct v4l2_dv_timings *p = arg;
 709
 710         switch (p->type) {
 711         case V4L2_DV_BT_656_1120:
 712                 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",
 713                                 p->bt.interlaced, p->bt.pixelclock,
 714                                 p->bt.width, p->bt.height,
 715                                 p->bt.polarities, p->bt.hfrontporch,
 716                                 p->bt.hsync, p->bt.hbackporch,
 717                                 p->bt.vfrontporch, p->bt.vsync,
 718                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 719                                 p->bt.il_vsync, p->bt.il_vbackporch,
 720                                 p->bt.standards, p->bt.flags);
 721                 break;
 722         default:
 723                 pr_cont("type=%d\n", p->type);
 724                 break;
 725         }
 726 }
 727
 728 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 729 {
 730         const struct v4l2_enum_dv_timings *p = arg;
 731
 732         pr_cont("index=%u, ", p->index);
 733         v4l_print_dv_timings(&p->timings, write_only);
 734 }
 735
 736 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 737 {
 738         const struct v4l2_dv_timings_cap *p = arg;
 739
 740         switch (p->type) {
 741         case V4L2_DV_BT_656_1120:
 742                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 743                         p->bt.min_width, p->bt.max_width,
 744                         p->bt.min_height, p->bt.max_height,
 745                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 746                         p->bt.standards, p->bt.capabilities);
 747                 break;
 748         default:
 749                 pr_cont("type=%u\n", p->type);
 750                 break;
 751         }
 752 }
 753
 754 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 755 {
 756         const struct v4l2_frmsizeenum *p = arg;
 757
 758         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 759                         p->index,
 760                         (p->pixel_format & 0xff),
 761                         (p->pixel_format >>  8) & 0xff,
 762                         (p->pixel_format >> 16) & 0xff,
 763                         (p->pixel_format >> 24) & 0xff,
 764                         p->type);
 765         switch (p->type) {
 766         case V4L2_FRMSIZE_TYPE_DISCRETE:
 767                 pr_cont(", wxh=%ux%u\n",
 768                         p->discrete.width, p->discrete.height);
 769                 break;
 770         case V4L2_FRMSIZE_TYPE_STEPWISE:
 771                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 772                                 p->stepwise.min_width,
 773                                 p->stepwise.min_height,
 774                                 p->stepwise.max_width,
 775                                 p->stepwise.max_height,
 776                                 p->stepwise.step_width,
 777                                 p->stepwise.step_height);
 778                 break;
 779         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 780                 /* fall through */
 781         default:
 782                 pr_cont("\n");
 783                 break;
 784         }
 785 }
 786
 787 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 788 {
 789         const struct v4l2_frmivalenum *p = arg;
 790
 791         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 792                         p->index,
 793                         (p->pixel_format & 0xff),
 794                         (p->pixel_format >>  8) & 0xff,
 795                         (p->pixel_format >> 16) & 0xff,
 796                         (p->pixel_format >> 24) & 0xff,
 797                         p->width, p->height, p->type);
 798         switch (p->type) {
 799         case V4L2_FRMIVAL_TYPE_DISCRETE:
 800                 pr_cont(", fps=%d/%d\n",
 801                                 p->discrete.numerator,
 802                                 p->discrete.denominator);
 803                 break;
 804         case V4L2_FRMIVAL_TYPE_STEPWISE:
 805                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 806                                 p->stepwise.min.numerator,
 807                                 p->stepwise.min.denominator,
 808                                 p->stepwise.max.numerator,
 809                                 p->stepwise.max.denominator,
 810                                 p->stepwise.step.numerator,
 811                                 p->stepwise.step.denominator);
 812                 break;
 813         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 814                 /* fall through */
 815         default:
 816                 pr_cont("\n");
 817                 break;
 818         }
 819 }
 820
 821 static void v4l_print_event(const void *arg, bool write_only)
 822 {
 823         const struct v4l2_event *p = arg;
 824         const struct v4l2_event_ctrl *c;
 825
 826         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 827                         p->type, p->pending, p->sequence, p->id,
 828                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 829         switch (p->type) {
 830         case V4L2_EVENT_VSYNC:
 831                 printk(KERN_DEBUG "field=%s\n",
 832                         prt_names(p->u.vsync.field, v4l2_field_names));
 833                 break;
 834         case V4L2_EVENT_CTRL:
 835                 c = &p->u.ctrl;
 836                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 837                         c->changes, c->type);
 838                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 839                         pr_cont("value64=%lld, ", c->value64);
 840                 else
 841                         pr_cont("value=%d, ", c->value);
 842                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 843                         c->flags, c->minimum, c->maximum,
 844                         c->step, c->default_value);
 845                 break;
 846         case V4L2_EVENT_FRAME_SYNC:
 847                 pr_cont("frame_sequence=%u\n",
 848                         p->u.frame_sync.frame_sequence);
 849                 break;
 850         }
 851 }
 852
 853 static void v4l_print_event_subscription(const void *arg, bool write_only)
 854 {
 855         const struct v4l2_event_subscription *p = arg;
 856
 857         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 858                         p->type, p->id, p->flags);
 859 }
 860
 861 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 862 {
 863         const struct v4l2_sliced_vbi_cap *p = arg;
 864         int i;
 865
 866         pr_cont("type=%s, service_set=0x%08x\n",
 867                         prt_names(p->type, v4l2_type_names), p->service_set);
 868         for (i = 0; i < 24; i++)
 869                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 870                                 p->service_lines[0][i],
 871                                 p->service_lines[1][i]);
 872 }
 873
 874 static void v4l_print_freq_band(const void *arg, bool write_only)
 875 {
 876         const struct v4l2_frequency_band *p = arg;
 877
 878         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 879                         p->tuner, p->type, p->index,
 880                         p->capability, p->rangelow,
 881                         p->rangehigh, p->modulation);
 882 }
 883
 884 static void v4l_print_edid(const void *arg, bool write_only)
 885 {
 886         const struct v4l2_edid *p = arg;
 887
 888         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 889                 p->pad, p->start_block, p->blocks);
 890 }
 891
 892 static void v4l_print_u32(const void *arg, bool write_only)
 893 {
 894         pr_cont("value=%u\n", *(const u32 *)arg);
 895 }
 896
 897 static void v4l_print_newline(const void *arg, bool write_only)
 898 {
 899         pr_cont("\n");
 900 }
 901
 902 static void v4l_print_default(const void *arg, bool write_only)
 903 {
 904         pr_cont("driver-specific ioctl\n");
 905 }
 906
 907 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 908 {
 909         __u32 i;
 910
 911         /* zero the reserved fields */
 912         c->reserved[0] = c->reserved[1] = 0;
 913         for (i = 0; i < c->count; i++)
 914                 c->controls[i].reserved2[0] = 0;
 915
 916         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 917            when using extended controls.
 918            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 919            is it allowed for backwards compatibility.
 920          */
 921         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 922                 return 0;
 923         if (!c->which)
 924                 return 1;
 925         /* Check that all controls are from the same control class. */
 926         for (i = 0; i < c->count; i++) {
 927                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 928                         c->error_idx = i;
 929                         return 0;
 930                 }
 931         }
 932         return 1;
 933 }
 934
 935 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 936 {
 937         struct video_device *vfd = video_devdata(file);
 938         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 939         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 940         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 941         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 942         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 943         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 944         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 945
 946         if (ops == NULL)
 947                 return -EINVAL;
 948
 949         switch (type) {
 950         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 951                 if ((is_vid || is_tch) && is_rx &&
 952                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 956                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 960                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 961                         return 0;
 962                 break;
 963         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 964                 if (is_vid && is_tx &&
 965                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 969                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 973                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_VBI_CAPTURE:
 977                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_VBI_OUTPUT:
 981                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 982                         return 0;
 983                 break;
 984         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 985                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 986                         return 0;
 987                 break;
 988         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 989                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 990                         return 0;
 991                 break;
 992         case V4L2_BUF_TYPE_SDR_CAPTURE:
 993                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 994                         return 0;
 995                 break;
 996         case V4L2_BUF_TYPE_SDR_OUTPUT:
 997                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 998                         return 0;
 999                 break;
1000         case V4L2_BUF_TYPE_META_CAPTURE:
1001                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
1002                         return 0;
1003                 break;
1004         default:
1005                 break;
1006         }
1007         return -EINVAL;
1008 }
1009
1010 static void v4l_sanitize_format(struct v4l2_format *fmt)
1011 {
1012         unsigned int offset;
1013
1014         /*
1015          * The v4l2_pix_format structure has been extended with fields that were
1016          * not previously required to be set to zero by applications. The priv
1017          * field, when set to a magic value, indicates the the extended fields
1018          * are valid. Otherwise they will contain undefined values. To simplify
1019          * the API towards drivers zero the extended fields and set the priv
1020          * field to the magic value when the extended pixel format structure
1021          * isn't used by applications.
1022          */
1023
1024         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1025             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1026                 return;
1027
1028         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1029                 return;
1030
1031         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1032
1033         offset = offsetof(struct v4l2_pix_format, priv)
1034                + sizeof(fmt->fmt.pix.priv);
1035         memset(((void *)&fmt->fmt.pix) + offset, 0,
1036                sizeof(fmt->fmt.pix) - offset);
1037 }
1038
1039 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1040                                 struct file *file, void *fh, void *arg)
1041 {
1042         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1043         struct video_device *vfd = video_devdata(file);
1044         int ret;
1045
1046         cap->version = LINUX_VERSION_CODE;
1047         cap->device_caps = vfd->device_caps;
1048         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1049
1050         ret = ops->vidioc_querycap(file, fh, cap);
1051
1052         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1053         /*
1054          * Drivers MUST fill in device_caps, so check for this and
1055          * warn if it was forgotten.
1056          */
1057         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1058                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1059                 cap->driver, cap->capabilities, cap->device_caps);
1060         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1061
1062         return ret;
1063 }
1064
1065 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1066                                 struct file *file, void *fh, void *arg)
1067 {
1068         struct video_device *vfd = video_devdata(file);
1069         int ret;
1070
1071         ret = v4l_enable_media_source(vfd);
1072         if (ret)
1073                 return ret;
1074         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1075 }
1076
1077 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1078                                 struct file *file, void *fh, void *arg)
1079 {
1080         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1081 }
1082
1083 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1084                                 struct file *file, void *fh, void *arg)
1085 {
1086         struct video_device *vfd;
1087         u32 *p = arg;
1088
1089         vfd = video_devdata(file);
1090         *p = v4l2_prio_max(vfd->prio);
1091         return 0;
1092 }
1093
1094 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1095                                 struct file *file, void *fh, void *arg)
1096 {
1097         struct video_device *vfd;
1098         struct v4l2_fh *vfh;
1099         u32 *p = arg;
1100
1101         vfd = video_devdata(file);
1102         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1103                 return -ENOTTY;
1104         vfh = file->private_data;
1105         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1106 }
1107
1108 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1109                                 struct file *file, void *fh, void *arg)
1110 {
1111         struct video_device *vfd = video_devdata(file);
1112         struct v4l2_input *p = arg;
1113
1114         /*
1115          * We set the flags for CAP_DV_TIMINGS &
1116          * CAP_STD here based on ioctl handler provided by the
1117          * driver. If the driver doesn't support these
1118          * for a specific input, it must override these flags.
1119          */
1120         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1121                 p->capabilities |= V4L2_IN_CAP_STD;
1122
1123         return ops->vidioc_enum_input(file, fh, p);
1124 }
1125
1126 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1127                                 struct file *file, void *fh, void *arg)
1128 {
1129         struct video_device *vfd = video_devdata(file);
1130         struct v4l2_output *p = arg;
1131
1132         /*
1133          * We set the flags for CAP_DV_TIMINGS &
1134          * CAP_STD here based on ioctl handler provided by the
1135          * driver. If the driver doesn't support these
1136          * for a specific output, it must override these flags.
1137          */
1138         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1139                 p->capabilities |= V4L2_OUT_CAP_STD;
1140
1141         return ops->vidioc_enum_output(file, fh, p);
1142 }
1143
1144 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1145 {
1146         const unsigned sz = sizeof(fmt->description);
1147         const char *descr = NULL;
1148         u32 flags = 0;
1149
1150         /*
1151          * We depart from the normal coding style here since the descriptions
1152          * should be aligned so it is easy to see which descriptions will be
1153          * longer than 31 characters (the max length for a description).
1154          * And frankly, this is easier to read anyway.
1155          *
1156          * Note that gcc will use O(log N) comparisons to find the right case.
1157          */
1158         switch (fmt->pixelformat) {
1159         /* Max description length mask: descr = "0123456789012345678901234567890" */
1160         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1161         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1162         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1163         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1164         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1165         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1166         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1167         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1168         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1169         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1170         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1171         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1172         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1173         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1174         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1175         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1176         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1177         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1178         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1179         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1180         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1181         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1182         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1183         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1184         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1185         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1186         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1187         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1188         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1189         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1190         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1191         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1192         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1193         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1194         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1195         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1196         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1197         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1198         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1199         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1200         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1201         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1202         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1203         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1204         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1205         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1206         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1207         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1208         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1209         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1210         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1211         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1212         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1213         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1214         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1215         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1216         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1217         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1218         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1219         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1220         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1221         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1222         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1223         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1224         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1225         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1226         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1227         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1228         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1229         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1230         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1231         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1232         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1233         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1234         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1235         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1236         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1237         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1238         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1239         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1240         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1241         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1242         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1243         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1244         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1245         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1246         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1247         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1248         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1249         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1250         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1251         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1252         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1253         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1254         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1255         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1256         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1257         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1258         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1259         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1260         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1261         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1262         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1263         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1264         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1265         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1266         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1267         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1268         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1269         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1270         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1271         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1272         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1273         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1274         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1275         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1276         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1277         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1278         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1279         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1280         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1281         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1282         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1283         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1284         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1285         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1286         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1287         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1288         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1289         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1290         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1291         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1292         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1293         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1294         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1295         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1296         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1297         case V4L2_META_FMT_UVC:         descr = "UVC payload header metadata"; break;
1298
1299         default:
1300                 /* Compressed formats */
1301                 flags = V4L2_FMT_FLAG_COMPRESSED;
1302                 switch (fmt->pixelformat) {
1303                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1304                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1305                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1306                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1307                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1308                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1309                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1310                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1311                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1312                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1313                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1314                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1315                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1316                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1317                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1318                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1319                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1320                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1321                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1322                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1323                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1324                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1325                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1326                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1327                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1328                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1329                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1330                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1331                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1332                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1333                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1334                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1335                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1336                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1337                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1338                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1339                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1340                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1341                 default:
1342                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1343                         if (fmt->description[0])
1344                                 return;
1345                         flags = 0;
1346                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1347                                         (char)(fmt->pixelformat & 0x7f),
1348                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1349                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1350                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1351                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1352                         break;
1353                 }
1354         }
1355
1356         if (descr)
1357                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1358         fmt->flags = flags;
1359 }
1360
1361 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1362                                 struct file *file, void *fh, void *arg)
1363 {
1364         struct v4l2_fmtdesc *p = arg;
1365         int ret = check_fmt(file, p->type);
1366
1367         if (ret)
1368                 return ret;
1369         ret = -EINVAL;
1370
1371         switch (p->type) {
1372         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1373                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1374                         break;
1375                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1376                 break;
1377         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1378                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1379                         break;
1380                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1381                 break;
1382         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1383                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1384                         break;
1385                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1386                 break;
1387         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1388                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1389                         break;
1390                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1391                 break;
1392         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1393                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1394                         break;
1395                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1396                 break;
1397         case V4L2_BUF_TYPE_SDR_CAPTURE:
1398                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1399                         break;
1400                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1401                 break;
1402         case V4L2_BUF_TYPE_SDR_OUTPUT:
1403                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1404                         break;
1405                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1406                 break;
1407         case V4L2_BUF_TYPE_META_CAPTURE:
1408                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1409                         break;
1410                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1411                 break;
1412         }
1413         if (ret == 0)
1414                 v4l_fill_fmtdesc(p);
1415         return ret;
1416 }
1417
1418 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1419                                 struct file *file, void *fh, void *arg)
1420 {
1421         struct v4l2_format *p = arg;
1422         int ret = check_fmt(file, p->type);
1423
1424         if (ret)
1425                 return ret;
1426
1427         /*
1428          * fmt can't be cleared for these overlay types due to the 'clips'
1429          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1430          * Those are provided by the user. So handle these two overlay types
1431          * first, and then just do a simple memset for the other types.
1432          */
1433         switch (p->type) {
1434         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1435         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1436                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1437                 u32 clipcount = p->fmt.win.clipcount;
1438                 void __user *bitmap = p->fmt.win.bitmap;
1439
1440                 memset(&p->fmt, 0, sizeof(p->fmt));
1441                 p->fmt.win.clips = clips;
1442                 p->fmt.win.clipcount = clipcount;
1443                 p->fmt.win.bitmap = bitmap;
1444                 break;
1445         }
1446         default:
1447                 memset(&p->fmt, 0, sizeof(p->fmt));
1448                 break;
1449         }
1450
1451         switch (p->type) {
1452         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1453                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1454                         break;
1455                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1456                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1457                 /* just in case the driver zeroed it again */
1458                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1459                 return ret;
1460         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1461                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1462         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1463                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1464         case V4L2_BUF_TYPE_VBI_CAPTURE:
1465                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1466         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1467                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1468         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1469                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1470                         break;
1471                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1472                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1473                 /* just in case the driver zeroed it again */
1474                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1475                 return ret;
1476         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1477                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1478         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1479                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1480         case V4L2_BUF_TYPE_VBI_OUTPUT:
1481                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1482         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1483                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1484         case V4L2_BUF_TYPE_SDR_CAPTURE:
1485                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1486         case V4L2_BUF_TYPE_SDR_OUTPUT:
1487                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1488         case V4L2_BUF_TYPE_META_CAPTURE:
1489                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1490         }
1491         return -EINVAL;
1492 }
1493
1494 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1495 {
1496         /*
1497          * The v4l2_pix_format structure contains fields that make no sense for
1498          * touch. Set them to default values in this case.
1499          */
1500
1501         p->field = V4L2_FIELD_NONE;
1502         p->colorspace = V4L2_COLORSPACE_RAW;
1503         p->flags = 0;
1504         p->ycbcr_enc = 0;
1505         p->quantization = 0;
1506         p->xfer_func = 0;
1507 }
1508
1509 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1510                                 struct file *file, void *fh, void *arg)
1511 {
1512         struct v4l2_format *p = arg;
1513         struct video_device *vfd = video_devdata(file);
1514         int ret = check_fmt(file, p->type);
1515
1516         if (ret)
1517                 return ret;
1518
1519         ret = v4l_enable_media_source(vfd);
1520         if (ret)
1521                 return ret;
1522         v4l_sanitize_format(p);
1523
1524         switch (p->type) {
1525         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1526                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1527                         break;
1528                 CLEAR_AFTER_FIELD(p, fmt.pix);
1529                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1530                 /* just in case the driver zeroed it again */
1531                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1532                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1533                         v4l_pix_format_touch(&p->fmt.pix);
1534                 return ret;
1535         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1536                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1537                         break;
1538                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1539                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1540         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1541                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1542                         break;
1543                 CLEAR_AFTER_FIELD(p, fmt.win);
1544                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1545         case V4L2_BUF_TYPE_VBI_CAPTURE:
1546                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1547                         break;
1548                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1549                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1550         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1551                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1552                         break;
1553                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1554                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1555         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1556                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1557                         break;
1558                 CLEAR_AFTER_FIELD(p, fmt.pix);
1559                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1560                 /* just in case the driver zeroed it again */
1561                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1562                 return ret;
1563         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1564                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1565                         break;
1566                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1567                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1568         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1569                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1570                         break;
1571                 CLEAR_AFTER_FIELD(p, fmt.win);
1572                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1573         case V4L2_BUF_TYPE_VBI_OUTPUT:
1574                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1575                         break;
1576                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1577                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1578         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1579                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1580                         break;
1581                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1582                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1583         case V4L2_BUF_TYPE_SDR_CAPTURE:
1584                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1585                         break;
1586                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1587                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1588         case V4L2_BUF_TYPE_SDR_OUTPUT:
1589                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1590                         break;
1591                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1592                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1593         case V4L2_BUF_TYPE_META_CAPTURE:
1594                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1595                         break;
1596                 CLEAR_AFTER_FIELD(p, fmt.meta);
1597                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1598         }
1599         return -EINVAL;
1600 }
1601
1602 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1603                                 struct file *file, void *fh, void *arg)
1604 {
1605         struct v4l2_format *p = arg;
1606         int ret = check_fmt(file, p->type);
1607
1608         if (ret)
1609                 return ret;
1610
1611         v4l_sanitize_format(p);
1612
1613         switch (p->type) {
1614         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1615                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1616                         break;
1617                 CLEAR_AFTER_FIELD(p, fmt.pix);
1618                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1619                 /* just in case the driver zeroed it again */
1620                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1621                 return ret;
1622         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1623                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1624                         break;
1625                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1626                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1627         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1628                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1629                         break;
1630                 CLEAR_AFTER_FIELD(p, fmt.win);
1631                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1632         case V4L2_BUF_TYPE_VBI_CAPTURE:
1633                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1634                         break;
1635                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1636                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1637         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1638                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1639                         break;
1640                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1641                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1642         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1643                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1644                         break;
1645                 CLEAR_AFTER_FIELD(p, fmt.pix);
1646                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1647                 /* just in case the driver zeroed it again */
1648                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1649                 return ret;
1650         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1651                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1652                         break;
1653                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1654                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1655         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1656                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1657                         break;
1658                 CLEAR_AFTER_FIELD(p, fmt.win);
1659                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1660         case V4L2_BUF_TYPE_VBI_OUTPUT:
1661                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1662                         break;
1663                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1664                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1665         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1666                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1667                         break;
1668                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1669                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1670         case V4L2_BUF_TYPE_SDR_CAPTURE:
1671                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1672                         break;
1673                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1674                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1675         case V4L2_BUF_TYPE_SDR_OUTPUT:
1676                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1677                         break;
1678                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1679                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1680         case V4L2_BUF_TYPE_META_CAPTURE:
1681                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1682                         break;
1683                 CLEAR_AFTER_FIELD(p, fmt.meta);
1684                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1685         }
1686         return -EINVAL;
1687 }
1688
1689 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1690                                 struct file *file, void *fh, void *arg)
1691 {
1692         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1693 }
1694
1695 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1696                                 struct file *file, void *fh, void *arg)
1697 {
1698         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1699 }
1700
1701 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1702                                 struct file *file, void *fh, void *arg)
1703 {
1704         struct video_device *vfd = video_devdata(file);
1705         struct v4l2_tuner *p = arg;
1706         int err;
1707
1708         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1709                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1710         err = ops->vidioc_g_tuner(file, fh, p);
1711         if (!err)
1712                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1713         return err;
1714 }
1715
1716 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1717                                 struct file *file, void *fh, void *arg)
1718 {
1719         struct video_device *vfd = video_devdata(file);
1720         struct v4l2_tuner *p = arg;
1721         int ret;
1722
1723         ret = v4l_enable_media_source(vfd);
1724         if (ret)
1725                 return ret;
1726         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1727                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1728         return ops->vidioc_s_tuner(file, fh, p);
1729 }
1730
1731 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1732                                 struct file *file, void *fh, void *arg)
1733 {
1734         struct video_device *vfd = video_devdata(file);
1735         struct v4l2_modulator *p = arg;
1736         int err;
1737
1738         if (vfd->vfl_type == VFL_TYPE_RADIO)
1739                 p->type = V4L2_TUNER_RADIO;
1740
1741         err = ops->vidioc_g_modulator(file, fh, p);
1742         if (!err)
1743                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1744         return err;
1745 }
1746
1747 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1748                                 struct file *file, void *fh, void *arg)
1749 {
1750         struct video_device *vfd = video_devdata(file);
1751         struct v4l2_modulator *p = arg;
1752
1753         if (vfd->vfl_type == VFL_TYPE_RADIO)
1754                 p->type = V4L2_TUNER_RADIO;
1755
1756         return ops->vidioc_s_modulator(file, fh, p);
1757 }
1758
1759 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1760                                 struct file *file, void *fh, void *arg)
1761 {
1762         struct video_device *vfd = video_devdata(file);
1763         struct v4l2_frequency *p = arg;
1764
1765         if (vfd->vfl_type == VFL_TYPE_SDR)
1766                 p->type = V4L2_TUNER_SDR;
1767         else
1768                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1769                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1770         return ops->vidioc_g_frequency(file, fh, p);
1771 }
1772
1773 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1774                                 struct file *file, void *fh, void *arg)
1775 {
1776         struct video_device *vfd = video_devdata(file);
1777         const struct v4l2_frequency *p = arg;
1778         enum v4l2_tuner_type type;
1779         int ret;
1780
1781         ret = v4l_enable_media_source(vfd);
1782         if (ret)
1783                 return ret;
1784         if (vfd->vfl_type == VFL_TYPE_SDR) {
1785                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1786                         return -EINVAL;
1787         } else {
1788                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1789                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1790                 if (type != p->type)
1791                         return -EINVAL;
1792         }
1793         return ops->vidioc_s_frequency(file, fh, p);
1794 }
1795
1796 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1797                                 struct file *file, void *fh, void *arg)
1798 {
1799         struct video_device *vfd = video_devdata(file);
1800         struct v4l2_standard *p = arg;
1801
1802         return v4l_video_std_enumstd(p, vfd->tvnorms);
1803 }
1804
1805 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1806                                 struct file *file, void *fh, void *arg)
1807 {
1808         struct video_device *vfd = video_devdata(file);
1809         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1810         int ret;
1811
1812         ret = v4l_enable_media_source(vfd);
1813         if (ret)
1814                 return ret;
1815         norm = id & vfd->tvnorms;
1816         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1817                 return -EINVAL;
1818
1819         /* Calls the specific handler */
1820         return ops->vidioc_s_std(file, fh, norm);
1821 }
1822
1823 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1824                                 struct file *file, void *fh, void *arg)
1825 {
1826         struct video_device *vfd = video_devdata(file);
1827         v4l2_std_id *p = arg;
1828         int ret;
1829
1830         ret = v4l_enable_media_source(vfd);
1831         if (ret)
1832                 return ret;
1833         /*
1834          * If no signal is detected, then the driver should return
1835          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1836          * any standards that do not apply removed.
1837          *
1838          * This means that tuners, audio and video decoders can join
1839          * their efforts to improve the standards detection.
1840          */
1841         *p = vfd->tvnorms;
1842         return ops->vidioc_querystd(file, fh, arg);
1843 }
1844
1845 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1846                                 struct file *file, void *fh, void *arg)
1847 {
1848         struct video_device *vfd = video_devdata(file);
1849         struct v4l2_hw_freq_seek *p = arg;
1850         enum v4l2_tuner_type type;
1851         int ret;
1852
1853         ret = v4l_enable_media_source(vfd);
1854         if (ret)
1855                 return ret;
1856         /* s_hw_freq_seek is not supported for SDR for now */
1857         if (vfd->vfl_type == VFL_TYPE_SDR)
1858                 return -EINVAL;
1859
1860         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1861                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1862         if (p->type != type)
1863                 return -EINVAL;
1864         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1865 }
1866
1867 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1868                                 struct file *file, void *fh, void *arg)
1869 {
1870         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1871 }
1872
1873 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1874                                 struct file *file, void *fh, void *arg)
1875 {
1876         struct v4l2_requestbuffers *p = arg;
1877         int ret = check_fmt(file, p->type);
1878
1879         if (ret)
1880                 return ret;
1881
1882         CLEAR_AFTER_FIELD(p, capabilities);
1883
1884         return ops->vidioc_reqbufs(file, fh, p);
1885 }
1886
1887 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1888                                 struct file *file, void *fh, void *arg)
1889 {
1890         struct v4l2_buffer *p = arg;
1891         int ret = check_fmt(file, p->type);
1892
1893         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1894 }
1895
1896 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1897                                 struct file *file, void *fh, void *arg)
1898 {
1899         struct v4l2_buffer *p = arg;
1900         int ret = check_fmt(file, p->type);
1901
1902         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1903 }
1904
1905 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1906                                 struct file *file, void *fh, void *arg)
1907 {
1908         struct v4l2_buffer *p = arg;
1909         int ret = check_fmt(file, p->type);
1910
1911         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1912 }
1913
1914 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1915                                 struct file *file, void *fh, void *arg)
1916 {
1917         struct v4l2_create_buffers *create = arg;
1918         int ret = check_fmt(file, create->format.type);
1919
1920         if (ret)
1921                 return ret;
1922
1923         CLEAR_AFTER_FIELD(create, capabilities);
1924
1925         v4l_sanitize_format(&create->format);
1926
1927         ret = ops->vidioc_create_bufs(file, fh, create);
1928
1929         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1930             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1931                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1932
1933         return ret;
1934 }
1935
1936 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1937                                 struct file *file, void *fh, void *arg)
1938 {
1939         struct v4l2_buffer *b = arg;
1940         int ret = check_fmt(file, b->type);
1941
1942         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1943 }
1944
1945 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1946                                 struct file *file, void *fh, void *arg)
1947 {
1948         struct v4l2_streamparm *p = arg;
1949         v4l2_std_id std;
1950         int ret = check_fmt(file, p->type);
1951
1952         if (ret)
1953                 return ret;
1954         if (ops->vidioc_g_parm)
1955                 return ops->vidioc_g_parm(file, fh, p);
1956         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1957             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1958                 return -EINVAL;
1959         p->parm.capture.readbuffers = 2;
1960         ret = ops->vidioc_g_std(file, fh, &std);
1961         if (ret == 0)
1962                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1963         return ret;
1964 }
1965
1966 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1967                                 struct file *file, void *fh, void *arg)
1968 {
1969         struct v4l2_streamparm *p = arg;
1970         int ret = check_fmt(file, p->type);
1971
1972         if (ret)
1973                 return ret;
1974
1975         /* Note: extendedmode is never used in drivers */
1976         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
1977                 memset(p->parm.output.reserved, 0,
1978                        sizeof(p->parm.output.reserved));
1979                 p->parm.output.extendedmode = 0;
1980                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
1981         } else {
1982                 memset(p->parm.capture.reserved, 0,
1983                        sizeof(p->parm.capture.reserved));
1984                 p->parm.capture.extendedmode = 0;
1985                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
1986         }
1987         return ops->vidioc_s_parm(file, fh, p);
1988 }
1989
1990 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1991                                 struct file *file, void *fh, void *arg)
1992 {
1993         struct video_device *vfd = video_devdata(file);
1994         struct v4l2_queryctrl *p = arg;
1995         struct v4l2_fh *vfh =
1996                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1997
1998         if (vfh && vfh->ctrl_handler)
1999                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2000         if (vfd->ctrl_handler)
2001                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2002         if (ops->vidioc_queryctrl)
2003                 return ops->vidioc_queryctrl(file, fh, p);
2004         return -ENOTTY;
2005 }
2006
2007 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2008                                 struct file *file, void *fh, void *arg)
2009 {
2010         struct video_device *vfd = video_devdata(file);
2011         struct v4l2_query_ext_ctrl *p = arg;
2012         struct v4l2_fh *vfh =
2013                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2014
2015         if (vfh && vfh->ctrl_handler)
2016                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2017         if (vfd->ctrl_handler)
2018                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2019         if (ops->vidioc_query_ext_ctrl)
2020                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2021         return -ENOTTY;
2022 }
2023
2024 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2025                                 struct file *file, void *fh, void *arg)
2026 {
2027         struct video_device *vfd = video_devdata(file);
2028         struct v4l2_querymenu *p = arg;
2029         struct v4l2_fh *vfh =
2030                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2031
2032         if (vfh && vfh->ctrl_handler)
2033                 return v4l2_querymenu(vfh->ctrl_handler, p);
2034         if (vfd->ctrl_handler)
2035                 return v4l2_querymenu(vfd->ctrl_handler, p);
2036         if (ops->vidioc_querymenu)
2037                 return ops->vidioc_querymenu(file, fh, p);
2038         return -ENOTTY;
2039 }
2040
2041 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2042                                 struct file *file, void *fh, void *arg)
2043 {
2044         struct video_device *vfd = video_devdata(file);
2045         struct v4l2_control *p = arg;
2046         struct v4l2_fh *vfh =
2047                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2048         struct v4l2_ext_controls ctrls;
2049         struct v4l2_ext_control ctrl;
2050
2051         if (vfh && vfh->ctrl_handler)
2052                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2053         if (vfd->ctrl_handler)
2054                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2055         if (ops->vidioc_g_ctrl)
2056                 return ops->vidioc_g_ctrl(file, fh, p);
2057         if (ops->vidioc_g_ext_ctrls == NULL)
2058                 return -ENOTTY;
2059
2060         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2061         ctrls.count = 1;
2062         ctrls.controls = &ctrl;
2063         ctrl.id = p->id;
2064         ctrl.value = p->value;
2065         if (check_ext_ctrls(&ctrls, 1)) {
2066                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2067
2068                 if (ret == 0)
2069                         p->value = ctrl.value;
2070                 return ret;
2071         }
2072         return -EINVAL;
2073 }
2074
2075 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2076                                 struct file *file, void *fh, void *arg)
2077 {
2078         struct video_device *vfd = video_devdata(file);
2079         struct v4l2_control *p = arg;
2080         struct v4l2_fh *vfh =
2081                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2082         struct v4l2_ext_controls ctrls;
2083         struct v4l2_ext_control ctrl;
2084
2085         if (vfh && vfh->ctrl_handler)
2086                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2087         if (vfd->ctrl_handler)
2088                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2089         if (ops->vidioc_s_ctrl)
2090                 return ops->vidioc_s_ctrl(file, fh, p);
2091         if (ops->vidioc_s_ext_ctrls == NULL)
2092                 return -ENOTTY;
2093
2094         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2095         ctrls.count = 1;
2096         ctrls.controls = &ctrl;
2097         ctrl.id = p->id;
2098         ctrl.value = p->value;
2099         if (check_ext_ctrls(&ctrls, 1))
2100                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2101         return -EINVAL;
2102 }
2103
2104 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2105                                 struct file *file, void *fh, void *arg)
2106 {
2107         struct video_device *vfd = video_devdata(file);
2108         struct v4l2_ext_controls *p = arg;
2109         struct v4l2_fh *vfh =
2110                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2111
2112         p->error_idx = p->count;
2113         if (vfh && vfh->ctrl_handler)
2114                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2115         if (vfd->ctrl_handler)
2116                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2117         if (ops->vidioc_g_ext_ctrls == NULL)
2118                 return -ENOTTY;
2119         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2120                                         -EINVAL;
2121 }
2122
2123 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2124                                 struct file *file, void *fh, void *arg)
2125 {
2126         struct video_device *vfd = video_devdata(file);
2127         struct v4l2_ext_controls *p = arg;
2128         struct v4l2_fh *vfh =
2129                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2130
2131         p->error_idx = p->count;
2132         if (vfh && vfh->ctrl_handler)
2133                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2134         if (vfd->ctrl_handler)
2135                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2136         if (ops->vidioc_s_ext_ctrls == NULL)
2137                 return -ENOTTY;
2138         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2139                                         -EINVAL;
2140 }
2141
2142 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2143                                 struct file *file, void *fh, void *arg)
2144 {
2145         struct video_device *vfd = video_devdata(file);
2146         struct v4l2_ext_controls *p = arg;
2147         struct v4l2_fh *vfh =
2148                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2149
2150         p->error_idx = p->count;
2151         if (vfh && vfh->ctrl_handler)
2152                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2153         if (vfd->ctrl_handler)
2154                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2155         if (ops->vidioc_try_ext_ctrls == NULL)
2156                 return -ENOTTY;
2157         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2158                                         -EINVAL;
2159 }
2160
2161 /*
2162  * The selection API specified originally that the _MPLANE buffer types
2163  * shouldn't be used. The reasons for this are lost in the mists of time
2164  * (or just really crappy memories). Regardless, this is really annoying
2165  * for userspace. So to keep things simple we map _MPLANE buffer types
2166  * to their 'regular' counterparts before calling the driver. And we
2167  * restore it afterwards. This way applications can use either buffer
2168  * type and drivers don't need to check for both.
2169  */
2170 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2171                            struct file *file, void *fh, void *arg)
2172 {
2173         struct v4l2_selection *p = arg;
2174         u32 old_type = p->type;
2175         int ret;
2176
2177         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2178                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2179         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2180                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2181         ret = ops->vidioc_g_selection(file, fh, p);
2182         p->type = old_type;
2183         return ret;
2184 }
2185
2186 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2187                            struct file *file, void *fh, void *arg)
2188 {
2189         struct v4l2_selection *p = arg;
2190         u32 old_type = p->type;
2191         int ret;
2192
2193         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2194                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2195         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2196                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2197         ret = ops->vidioc_s_selection(file, fh, p);
2198         p->type = old_type;
2199         return ret;
2200 }
2201
2202 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2203                                 struct file *file, void *fh, void *arg)
2204 {
2205         struct v4l2_crop *p = arg;
2206         struct v4l2_selection s = {
2207                 .type = p->type,
2208         };
2209         int ret;
2210
2211         if (ops->vidioc_g_crop)
2212                 return ops->vidioc_g_crop(file, fh, p);
2213         /* simulate capture crop using selection api */
2214
2215         /* crop means compose for output devices */
2216         if (V4L2_TYPE_IS_OUTPUT(p->type))
2217                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2218         else
2219                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2220
2221         ret = v4l_g_selection(ops, file, fh, &s);
2222
2223         /* copying results to old structure on success */
2224         if (!ret)
2225                 p->c = s.r;
2226         return ret;
2227 }
2228
2229 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2230                                 struct file *file, void *fh, void *arg)
2231 {
2232         struct v4l2_crop *p = arg;
2233         struct v4l2_selection s = {
2234                 .type = p->type,
2235                 .r = p->c,
2236         };
2237
2238         if (ops->vidioc_s_crop)
2239                 return ops->vidioc_s_crop(file, fh, p);
2240         /* simulate capture crop using selection api */
2241
2242         /* crop means compose for output devices */
2243         if (V4L2_TYPE_IS_OUTPUT(p->type))
2244                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2245         else
2246                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2247
2248         return v4l_s_selection(ops, file, fh, &s);
2249 }
2250
2251 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2252                                 struct file *file, void *fh, void *arg)
2253 {
2254         struct v4l2_cropcap *p = arg;
2255         struct v4l2_selection s = { .type = p->type };
2256         int ret = 0;
2257
2258         /* setting trivial pixelaspect */
2259         p->pixelaspect.numerator = 1;
2260         p->pixelaspect.denominator = 1;
2261
2262         /*
2263          * The determine_valid_ioctls() call already should ensure
2264          * that this can never happen, but just in case...
2265          */
2266         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2267                 return -ENOTTY;
2268
2269         if (ops->vidioc_cropcap)
2270                 ret = ops->vidioc_cropcap(file, fh, p);
2271
2272         if (!ops->vidioc_g_selection)
2273                 return ret;
2274
2275         /*
2276          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2277          * square pixel aspect ratio in that case.
2278          */
2279         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2280                 return ret;
2281
2282         /* Use g_selection() to fill in the bounds and defrect rectangles */
2283
2284         /* obtaining bounds */
2285         if (V4L2_TYPE_IS_OUTPUT(p->type))
2286                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2287         else
2288                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2289
2290         ret = v4l_g_selection(ops, file, fh, &s);
2291         if (ret)
2292                 return ret;
2293         p->bounds = s.r;
2294
2295         /* obtaining defrect */
2296         if (V4L2_TYPE_IS_OUTPUT(p->type))
2297                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2298         else
2299                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2300
2301         ret = v4l_g_selection(ops, file, fh, &s);
2302         if (ret)
2303                 return ret;
2304         p->defrect = s.r;
2305
2306         return 0;
2307 }
2308
2309 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2310                                 struct file *file, void *fh, void *arg)
2311 {
2312         struct video_device *vfd = video_devdata(file);
2313         int ret;
2314
2315         if (vfd->v4l2_dev)
2316                 pr_info("%s: =================  START STATUS  =================\n",
2317                         vfd->v4l2_dev->name);
2318         ret = ops->vidioc_log_status(file, fh);
2319         if (vfd->v4l2_dev)
2320                 pr_info("%s: ==================  END STATUS  ==================\n",
2321                         vfd->v4l2_dev->name);
2322         return ret;
2323 }
2324
2325 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2326                                 struct file *file, void *fh, void *arg)
2327 {
2328 #ifdef CONFIG_VIDEO_ADV_DEBUG
2329         struct v4l2_dbg_register *p = arg;
2330         struct video_device *vfd = video_devdata(file);
2331         struct v4l2_subdev *sd;
2332         int idx = 0;
2333
2334         if (!capable(CAP_SYS_ADMIN))
2335                 return -EPERM;
2336         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2337                 if (vfd->v4l2_dev == NULL)
2338                         return -EINVAL;
2339                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2340                         if (p->match.addr == idx++)
2341                                 return v4l2_subdev_call(sd, core, g_register, p);
2342                 return -EINVAL;
2343         }
2344         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2345             (ops->vidioc_g_chip_info || p->match.addr == 0))
2346                 return ops->vidioc_g_register(file, fh, p);
2347         return -EINVAL;
2348 #else
2349         return -ENOTTY;
2350 #endif
2351 }
2352
2353 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2354                                 struct file *file, void *fh, void *arg)
2355 {
2356 #ifdef CONFIG_VIDEO_ADV_DEBUG
2357         const struct v4l2_dbg_register *p = arg;
2358         struct video_device *vfd = video_devdata(file);
2359         struct v4l2_subdev *sd;
2360         int idx = 0;
2361
2362         if (!capable(CAP_SYS_ADMIN))
2363                 return -EPERM;
2364         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2365                 if (vfd->v4l2_dev == NULL)
2366                         return -EINVAL;
2367                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2368                         if (p->match.addr == idx++)
2369                                 return v4l2_subdev_call(sd, core, s_register, p);
2370                 return -EINVAL;
2371         }
2372         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2373             (ops->vidioc_g_chip_info || p->match.addr == 0))
2374                 return ops->vidioc_s_register(file, fh, p);
2375         return -EINVAL;
2376 #else
2377         return -ENOTTY;
2378 #endif
2379 }
2380
2381 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2382                                 struct file *file, void *fh, void *arg)
2383 {
2384 #ifdef CONFIG_VIDEO_ADV_DEBUG
2385         struct video_device *vfd = video_devdata(file);
2386         struct v4l2_dbg_chip_info *p = arg;
2387         struct v4l2_subdev *sd;
2388         int idx = 0;
2389
2390         switch (p->match.type) {
2391         case V4L2_CHIP_MATCH_BRIDGE:
2392                 if (ops->vidioc_s_register)
2393                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2394                 if (ops->vidioc_g_register)
2395                         p->flags |= V4L2_CHIP_FL_READABLE;
2396                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2397                 if (ops->vidioc_g_chip_info)
2398                         return ops->vidioc_g_chip_info(file, fh, arg);
2399                 if (p->match.addr)
2400                         return -EINVAL;
2401                 return 0;
2402
2403         case V4L2_CHIP_MATCH_SUBDEV:
2404                 if (vfd->v4l2_dev == NULL)
2405                         break;
2406                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2407                         if (p->match.addr != idx++)
2408                                 continue;
2409                         if (sd->ops->core && sd->ops->core->s_register)
2410                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2411                         if (sd->ops->core && sd->ops->core->g_register)
2412                                 p->flags |= V4L2_CHIP_FL_READABLE;
2413                         strlcpy(p->name, sd->name, sizeof(p->name));
2414                         return 0;
2415                 }
2416                 break;
2417         }
2418         return -EINVAL;
2419 #else
2420         return -ENOTTY;
2421 #endif
2422 }
2423
2424 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2425                                 struct file *file, void *fh, void *arg)
2426 {
2427         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2428 }
2429
2430 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2431                                 struct file *file, void *fh, void *arg)
2432 {
2433         return ops->vidioc_subscribe_event(fh, arg);
2434 }
2435
2436 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2437                                 struct file *file, void *fh, void *arg)
2438 {
2439         return ops->vidioc_unsubscribe_event(fh, arg);
2440 }
2441
2442 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2443                                 struct file *file, void *fh, void *arg)
2444 {
2445         struct v4l2_sliced_vbi_cap *p = arg;
2446         int ret = check_fmt(file, p->type);
2447
2448         if (ret)
2449                 return ret;
2450
2451         /* Clear up to type, everything after type is zeroed already */
2452         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2453
2454         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2455 }
2456
2457 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2458                                 struct file *file, void *fh, void *arg)
2459 {
2460         struct video_device *vfd = video_devdata(file);
2461         struct v4l2_frequency_band *p = arg;
2462         enum v4l2_tuner_type type;
2463         int err;
2464
2465         if (vfd->vfl_type == VFL_TYPE_SDR) {
2466                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2467                         return -EINVAL;
2468                 type = p->type;
2469         } else {
2470                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2471                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2472                 if (type != p->type)
2473                         return -EINVAL;
2474         }
2475         if (ops->vidioc_enum_freq_bands) {
2476                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2477                 if (err != -ENOTTY)
2478                         return err;
2479         }
2480         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2481                 struct v4l2_tuner t = {
2482                         .index = p->tuner,
2483                         .type = type,
2484                 };
2485
2486                 if (p->index)
2487                         return -EINVAL;
2488                 err = ops->vidioc_g_tuner(file, fh, &t);
2489                 if (err)
2490                         return err;
2491                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2492                 p->rangelow = t.rangelow;
2493                 p->rangehigh = t.rangehigh;
2494                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2495                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2496                 return 0;
2497         }
2498         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2499                 struct v4l2_modulator m = {
2500                         .index = p->tuner,
2501                 };
2502
2503                 if (type != V4L2_TUNER_RADIO)
2504                         return -EINVAL;
2505                 if (p->index)
2506                         return -EINVAL;
2507                 err = ops->vidioc_g_modulator(file, fh, &m);
2508                 if (err)
2509                         return err;
2510                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2511                 p->rangelow = m.rangelow;
2512                 p->rangehigh = m.rangehigh;
2513                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2514                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2515                 return 0;
2516         }
2517         return -ENOTTY;
2518 }
2519
2520 struct v4l2_ioctl_info {
2521         unsigned int ioctl;
2522         u32 flags;
2523         const char * const name;
2524         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2525                     void *fh, void *p);
2526         void (*debug)(const void *arg, bool write_only);
2527 };
2528
2529 /* This control needs a priority check */
2530 #define INFO_FL_PRIO            (1 << 0)
2531 /* This control can be valid if the filehandle passes a control handler. */
2532 #define INFO_FL_CTRL            (1 << 1)
2533 /* Queuing ioctl */
2534 #define INFO_FL_QUEUE           (1 << 2)
2535 /* Always copy back result, even on error */
2536 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2537 /* Zero struct from after the field to the end */
2538 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2539         ((offsetof(struct v4l2_struct, field) +                 \
2540           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2541 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2542
2543 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2544         static int v4l_stub_ ## _vidioc(                        \
2545                         const struct v4l2_ioctl_ops *ops,       \
2546                         struct file *file, void *fh, void *p)   \
2547         {                                                       \
2548                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2549         }
2550
2551 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2552         [_IOC_NR(_ioctl)] = {                                   \
2553                 .ioctl = _ioctl,                                \
2554                 .flags = _flags,                                \
2555                 .name = #_ioctl,                                \
2556                 .func = _func,                                  \
2557                 .debug = _debug,                                \
2558         }
2559
2560 DEFINE_V4L_STUB_FUNC(g_fbuf)
2561 DEFINE_V4L_STUB_FUNC(s_fbuf)
2562 DEFINE_V4L_STUB_FUNC(expbuf)
2563 DEFINE_V4L_STUB_FUNC(g_std)
2564 DEFINE_V4L_STUB_FUNC(g_audio)
2565 DEFINE_V4L_STUB_FUNC(s_audio)
2566 DEFINE_V4L_STUB_FUNC(g_input)
2567 DEFINE_V4L_STUB_FUNC(g_edid)
2568 DEFINE_V4L_STUB_FUNC(s_edid)
2569 DEFINE_V4L_STUB_FUNC(g_output)
2570 DEFINE_V4L_STUB_FUNC(g_audout)
2571 DEFINE_V4L_STUB_FUNC(s_audout)
2572 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2573 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2574 DEFINE_V4L_STUB_FUNC(enumaudio)
2575 DEFINE_V4L_STUB_FUNC(enumaudout)
2576 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2577 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2578 DEFINE_V4L_STUB_FUNC(g_enc_index)
2579 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2580 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2581 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2582 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2583 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2584 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2585 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2586 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2587 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2588
2589 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2590         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2591         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2592         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2593         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2594         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2595         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2596         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2597         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2598         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2599         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2600         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2601         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2602         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2603         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2604         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2605         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2606         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2607         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2608         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2609         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2610         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2611         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2612         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2613         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2614         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2615         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2616         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2617         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2618         IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2619         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2620         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2621         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2622         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2623         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2624         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2625         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2626         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2627         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2628         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2629         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2630         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2631         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2632         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2633         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2634         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2635         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2636         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2637         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2638         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2639         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2640         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2641         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2642         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2643         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2644         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)),
2645         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2646         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2647         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2648         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2649         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2650         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2651         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2652         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2653         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2654         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2655         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2656         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2657         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2658         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2659         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)),
2660         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2661         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2662         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2663         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2664         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2665         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2666         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2667         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2668         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2669         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2670         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)),
2671         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)),
2672 };
2673 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2674
2675 static bool v4l2_is_known_ioctl(unsigned int cmd)
2676 {
2677         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2678                 return false;
2679         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2680 }
2681
2682 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2683 static bool v4l2_ioctl_m2m_queue_is_output(unsigned int cmd, void *arg)
2684 {
2685         switch (cmd) {
2686         case VIDIOC_CREATE_BUFS: {
2687                 struct v4l2_create_buffers *cbufs = arg;
2688
2689                 return V4L2_TYPE_IS_OUTPUT(cbufs->format.type);
2690         }
2691         case VIDIOC_REQBUFS: {
2692                 struct v4l2_requestbuffers *rbufs = arg;
2693
2694                 return V4L2_TYPE_IS_OUTPUT(rbufs->type);
2695         }
2696         case VIDIOC_QBUF:
2697         case VIDIOC_DQBUF:
2698         case VIDIOC_QUERYBUF:
2699         case VIDIOC_PREPARE_BUF: {
2700                 struct v4l2_buffer *buf = arg;
2701
2702                 return V4L2_TYPE_IS_OUTPUT(buf->type);
2703         }
2704         case VIDIOC_EXPBUF: {
2705                 struct v4l2_exportbuffer *expbuf = arg;
2706
2707                 return V4L2_TYPE_IS_OUTPUT(expbuf->type);
2708         }
2709         case VIDIOC_STREAMON:
2710         case VIDIOC_STREAMOFF: {
2711                 int *type = arg;
2712
2713                 return V4L2_TYPE_IS_OUTPUT(*type);
2714         }
2715         default:
2716                 return false;
2717         }
2718 }
2719 #endif
2720
2721 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2722                                          struct v4l2_fh *vfh, unsigned int cmd,
2723                                          void *arg)
2724 {
2725         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2726                 return vdev->lock;
2727 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2728         if (vfh && vfh->m2m_ctx &&
2729             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2730                 bool is_output = v4l2_ioctl_m2m_queue_is_output(cmd, arg);
2731                 struct v4l2_m2m_queue_ctx *ctx = is_output ?
2732                         &vfh->m2m_ctx->out_q_ctx : &vfh->m2m_ctx->cap_q_ctx;
2733
2734                 if (ctx->q.lock)
2735                         return ctx->q.lock;
2736         }
2737 #endif
2738         if (vdev->queue && vdev->queue->lock &&
2739                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2740                 return vdev->queue->lock;
2741         return vdev->lock;
2742 }
2743
2744 /* Common ioctl debug function. This function can be used by
2745    external ioctl messages as well as internal V4L ioctl */
2746 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2747 {
2748         const char *dir, *type;
2749
2750         if (prefix)
2751                 printk(KERN_DEBUG "%s: ", prefix);
2752
2753         switch (_IOC_TYPE(cmd)) {
2754         case 'd':
2755                 type = "v4l2_int";
2756                 break;
2757         case 'V':
2758                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2759                         type = "v4l2";
2760                         break;
2761                 }
2762                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2763                 return;
2764         default:
2765                 type = "unknown";
2766                 break;
2767         }
2768
2769         switch (_IOC_DIR(cmd)) {
2770         case _IOC_NONE:              dir = "--"; break;
2771         case _IOC_READ:              dir = "r-"; break;
2772         case _IOC_WRITE:             dir = "-w"; break;
2773         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2774         default:                     dir = "*ERR*"; break;
2775         }
2776         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2777                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2778 }
2779 EXPORT_SYMBOL(v4l_printk_ioctl);
2780
2781 static long __video_do_ioctl(struct file *file,
2782                 unsigned int cmd, void *arg)
2783 {
2784         struct video_device *vfd = video_devdata(file);
2785         struct mutex *lock; /* ioctl serialization mutex */
2786         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2787         bool write_only = false;
2788         struct v4l2_ioctl_info default_info;
2789         const struct v4l2_ioctl_info *info;
2790         void *fh = file->private_data;
2791         struct v4l2_fh *vfh = NULL;
2792         int dev_debug = vfd->dev_debug;
2793         long ret = -ENOTTY;
2794
2795         if (ops == NULL) {
2796                 pr_warn("%s: has no ioctl_ops.\n",
2797                                 video_device_node_name(vfd));
2798                 return ret;
2799         }
2800
2801         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2802                 vfh = file->private_data;
2803
2804         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2805
2806         if (lock && mutex_lock_interruptible(lock))
2807                 return -ERESTARTSYS;
2808
2809         if (!video_is_registered(vfd)) {
2810                 ret = -ENODEV;
2811                 goto unlock;
2812         }
2813
2814         if (v4l2_is_known_ioctl(cmd)) {
2815                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2816
2817                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2818                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2819                         goto done;
2820
2821                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2822                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2823                         if (ret)
2824                                 goto done;
2825                 }
2826         } else {
2827                 default_info.ioctl = cmd;
2828                 default_info.flags = 0;
2829                 default_info.debug = v4l_print_default;
2830                 info = &default_info;
2831         }
2832
2833         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2834         if (info != &default_info) {
2835                 ret = info->func(ops, file, fh, arg);
2836         } else if (!ops->vidioc_default) {
2837                 ret = -ENOTTY;
2838         } else {
2839                 ret = ops->vidioc_default(file, fh,
2840                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2841                         cmd, arg);
2842         }
2843
2844 done:
2845         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2846                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2847                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2848                         goto unlock;
2849
2850                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2851                 if (ret < 0)
2852                         pr_cont(": error %ld", ret);
2853                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2854                         pr_cont("\n");
2855                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2856                         info->debug(arg, write_only);
2857                 else {
2858                         pr_cont(": ");
2859                         info->debug(arg, write_only);
2860                 }
2861         }
2862
2863 unlock:
2864         if (lock)
2865                 mutex_unlock(lock);
2866         return ret;
2867 }
2868
2869 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2870                             void __user **user_ptr, void ***kernel_ptr)
2871 {
2872         int ret = 0;
2873
2874         switch (cmd) {
2875         case VIDIOC_PREPARE_BUF:
2876         case VIDIOC_QUERYBUF:
2877         case VIDIOC_QBUF:
2878         case VIDIOC_DQBUF: {
2879                 struct v4l2_buffer *buf = parg;
2880
2881                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2882                         if (buf->length > VIDEO_MAX_PLANES) {
2883                                 ret = -EINVAL;
2884                                 break;
2885                         }
2886                         *user_ptr = (void __user *)buf->m.planes;
2887                         *kernel_ptr = (void **)&buf->m.planes;
2888                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2889                         ret = 1;
2890                 }
2891                 break;
2892         }
2893
2894         case VIDIOC_G_EDID:
2895         case VIDIOC_S_EDID: {
2896                 struct v4l2_edid *edid = parg;
2897
2898                 if (edid->blocks) {
2899                         if (edid->blocks > 256) {
2900                                 ret = -EINVAL;
2901                                 break;
2902                         }
2903                         *user_ptr = (void __user *)edid->edid;
2904                         *kernel_ptr = (void **)&edid->edid;
2905                         *array_size = edid->blocks * 128;
2906                         ret = 1;
2907                 }
2908                 break;
2909         }
2910
2911         case VIDIOC_S_EXT_CTRLS:
2912         case VIDIOC_G_EXT_CTRLS:
2913         case VIDIOC_TRY_EXT_CTRLS: {
2914                 struct v4l2_ext_controls *ctrls = parg;
2915
2916                 if (ctrls->count != 0) {
2917                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2918                                 ret = -EINVAL;
2919                                 break;
2920                         }
2921                         *user_ptr = (void __user *)ctrls->controls;
2922                         *kernel_ptr = (void **)&ctrls->controls;
2923                         *array_size = sizeof(struct v4l2_ext_control)
2924                                     * ctrls->count;
2925                         ret = 1;
2926                 }
2927                 break;
2928         }
2929         }
2930
2931         return ret;
2932 }
2933
2934 long
2935 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2936                v4l2_kioctl func)
2937 {
2938         char    sbuf[128];
2939         void    *mbuf = NULL;
2940         void    *parg = (void *)arg;
2941         long    err  = -EINVAL;
2942         bool    has_array_args;
2943         bool    always_copy = false;
2944         size_t  array_size = 0;
2945         void __user *user_ptr = NULL;
2946         void    **kernel_ptr = NULL;
2947         const size_t ioc_size = _IOC_SIZE(cmd);
2948
2949         /*  Copy arguments into temp kernel buffer  */
2950         if (_IOC_DIR(cmd) != _IOC_NONE) {
2951                 if (ioc_size <= sizeof(sbuf)) {
2952                         parg = sbuf;
2953                 } else {
2954                         /* too big to allocate from stack */
2955                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
2956                         if (NULL == mbuf)
2957                                 return -ENOMEM;
2958                         parg = mbuf;
2959                 }
2960
2961                 err = -EFAULT;
2962                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2963                         unsigned int n = ioc_size;
2964
2965                         /*
2966                          * In some cases, only a few fields are used as input,
2967                          * i.e. when the app sets "index" and then the driver
2968                          * fills in the rest of the structure for the thing
2969                          * with that index.  We only need to copy up the first
2970                          * non-input field.
2971                          */
2972                         if (v4l2_is_known_ioctl(cmd)) {
2973                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2974
2975                                 if (flags & INFO_FL_CLEAR_MASK)
2976                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2977                                 always_copy = flags & INFO_FL_ALWAYS_COPY;
2978                         }
2979
2980                         if (copy_from_user(parg, (void __user *)arg, n))
2981                                 goto out;
2982
2983                         /* zero out anything we don't copy from userspace */
2984                         if (n < ioc_size)
2985                                 memset((u8 *)parg + n, 0, ioc_size - n);
2986                 } else {
2987                         /* read-only ioctl */
2988                         memset(parg, 0, ioc_size);
2989                 }
2990         }
2991
2992         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2993         if (err < 0)
2994                 goto out;
2995         has_array_args = err;
2996
2997         if (has_array_args) {
2998                 /*
2999                  * When adding new types of array args, make sure that the
3000                  * parent argument to ioctl (which contains the pointer to the
3001                  * array) fits into sbuf (so that mbuf will still remain
3002                  * unused up to here).
3003                  */
3004                 mbuf = kvmalloc(array_size, GFP_KERNEL);
3005                 err = -ENOMEM;
3006                 if (NULL == mbuf)
3007                         goto out_array_args;
3008                 err = -EFAULT;
3009                 if (copy_from_user(mbuf, user_ptr, array_size))
3010                         goto out_array_args;
3011                 *kernel_ptr = mbuf;
3012         }
3013
3014         /* Handles IOCTL */
3015         err = func(file, cmd, parg);
3016         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3017                 err = -ENOTTY;
3018                 goto out;
3019         }
3020
3021         if (err == 0) {
3022                 if (cmd == VIDIOC_DQBUF)
3023                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3024                 else if (cmd == VIDIOC_QBUF)
3025                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3026         }
3027
3028         if (has_array_args) {
3029                 *kernel_ptr = (void __force *)user_ptr;
3030                 if (copy_to_user(user_ptr, mbuf, array_size))
3031                         err = -EFAULT;
3032                 goto out_array_args;
3033         }
3034         /*
3035          * Some ioctls can return an error, but still have valid
3036          * results that must be returned.
3037          */
3038         if (err < 0 && !always_copy)
3039                 goto out;
3040
3041 out_array_args:
3042         /*  Copy results into user buffer  */
3043         switch (_IOC_DIR(cmd)) {
3044         case _IOC_READ:
3045         case (_IOC_WRITE | _IOC_READ):
3046                 if (copy_to_user((void __user *)arg, parg, ioc_size))
3047                         err = -EFAULT;
3048                 break;
3049         }
3050
3051 out:
3052         kvfree(mbuf);
3053         return err;
3054 }
3055
3056 long video_ioctl2(struct file *file,
3057                unsigned int cmd, unsigned long arg)
3058 {
3059         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3060 }
3061 EXPORT_SYMBOL(video_ioctl2);