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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Video capture interface for Linux version 2
   4  *
   5  * A generic framework to process V4L2 ioctl commands.
   6  *
   7  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
   8  *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/videodev2.h>
  20
  21 #include <media/v4l2-common.h>
  22 #include <media/v4l2-ioctl.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-fh.h>
  25 #include <media/v4l2-event.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/videobuf2-v4l2.h>
  28 #include <media/v4l2-mc.h>
  29 #include <media/v4l2-mem2mem.h>
  30
  31 #include <trace/events/v4l2.h>
  32
  33 /* Zero out the end of the struct pointed to by p.  Everything after, but
  34  * not including, the specified field is cleared. */
  35 #define CLEAR_AFTER_FIELD(p, field) \
  36         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  37         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  38
  39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  40
  41 struct std_descr {
  42         v4l2_std_id std;
  43         const char *descr;
  44 };
  45
  46 static const struct std_descr standards[] = {
  47         { V4L2_STD_NTSC,        "NTSC"      },
  48         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  49         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  50         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  51         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  52         { V4L2_STD_PAL,         "PAL"       },
  53         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  54         { V4L2_STD_PAL_B,       "PAL-B"     },
  55         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  56         { V4L2_STD_PAL_G,       "PAL-G"     },
  57         { V4L2_STD_PAL_H,       "PAL-H"     },
  58         { V4L2_STD_PAL_I,       "PAL-I"     },
  59         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  60         { V4L2_STD_PAL_D,       "PAL-D"     },
  61         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  62         { V4L2_STD_PAL_K,       "PAL-K"     },
  63         { V4L2_STD_PAL_M,       "PAL-M"     },
  64         { V4L2_STD_PAL_N,       "PAL-N"     },
  65         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  66         { V4L2_STD_PAL_60,      "PAL-60"    },
  67         { V4L2_STD_SECAM,       "SECAM"     },
  68         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  69         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  70         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  71         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  72         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  73         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  74         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  75         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  76         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  77         { 0,                    "Unknown"   }
  78 };
  79
  80 /* video4linux standard ID conversion to standard name
  81  */
  82 const char *v4l2_norm_to_name(v4l2_std_id id)
  83 {
  84         u32 myid = id;
  85         int i;
  86
  87         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  88            64 bit comparisons. So, on that architecture, with some gcc
  89            variants, compilation fails. Currently, the max value is 30bit wide.
  90          */
  91         BUG_ON(myid != id);
  92
  93         for (i = 0; standards[i].std; i++)
  94                 if (myid == standards[i].std)
  95                         break;
  96         return standards[i].descr;
  97 }
  98 EXPORT_SYMBOL(v4l2_norm_to_name);
  99
 100 /* Returns frame period for the given standard */
 101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 102 {
 103         if (id & V4L2_STD_525_60) {
 104                 frameperiod->numerator = 1001;
 105                 frameperiod->denominator = 30000;
 106         } else {
 107                 frameperiod->numerator = 1;
 108                 frameperiod->denominator = 25;
 109         }
 110 }
 111 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 112
 113 /* Fill in the fields of a v4l2_standard structure according to the
 114    'id' and 'transmission' parameters.  Returns negative on error.  */
 115 int v4l2_video_std_construct(struct v4l2_standard *vs,
 116                              int id, const char *name)
 117 {
 118         vs->id = id;
 119         v4l2_video_std_frame_period(id, &vs->frameperiod);
 120         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 121         strscpy(vs->name, name, sizeof(vs->name));
 122         return 0;
 123 }
 124 EXPORT_SYMBOL(v4l2_video_std_construct);
 125
 126 /* Fill in the fields of a v4l2_standard structure according to the
 127  * 'id' and 'vs->index' parameters. Returns negative on error. */
 128 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 129 {
 130         v4l2_std_id curr_id = 0;
 131         unsigned int index = vs->index, i, j = 0;
 132         const char *descr = "";
 133
 134         /* Return -ENODATA if the id for the current input
 135            or output is 0, meaning that it doesn't support this API. */
 136         if (id == 0)
 137                 return -ENODATA;
 138
 139         /* Return norm array in a canonical way */
 140         for (i = 0; i <= index && id; i++) {
 141                 /* last std value in the standards array is 0, so this
 142                    while always ends there since (id & 0) == 0. */
 143                 while ((id & standards[j].std) != standards[j].std)
 144                         j++;
 145                 curr_id = standards[j].std;
 146                 descr = standards[j].descr;
 147                 j++;
 148                 if (curr_id == 0)
 149                         break;
 150                 if (curr_id != V4L2_STD_PAL &&
 151                                 curr_id != V4L2_STD_SECAM &&
 152                                 curr_id != V4L2_STD_NTSC)
 153                         id &= ~curr_id;
 154         }
 155         if (i <= index)
 156                 return -EINVAL;
 157
 158         v4l2_video_std_construct(vs, curr_id, descr);
 159         return 0;
 160 }
 161
 162 /* ----------------------------------------------------------------- */
 163 /* some arrays for pretty-printing debug messages of enum types      */
 164
 165 const char *v4l2_field_names[] = {
 166         [V4L2_FIELD_ANY]        = "any",
 167         [V4L2_FIELD_NONE]       = "none",
 168         [V4L2_FIELD_TOP]        = "top",
 169         [V4L2_FIELD_BOTTOM]     = "bottom",
 170         [V4L2_FIELD_INTERLACED] = "interlaced",
 171         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 172         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 173         [V4L2_FIELD_ALTERNATE]  = "alternate",
 174         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 175         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 176 };
 177 EXPORT_SYMBOL(v4l2_field_names);
 178
 179 const char *v4l2_type_names[] = {
 180         [0]                                = "0",
 181         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 182         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 183         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 184         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 185         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 186         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 187         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 188         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 189         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 190         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 191         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 192         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 193         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 194         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 195 };
 196 EXPORT_SYMBOL(v4l2_type_names);
 197
 198 static const char *v4l2_memory_names[] = {
 199         [V4L2_MEMORY_MMAP]    = "mmap",
 200         [V4L2_MEMORY_USERPTR] = "userptr",
 201         [V4L2_MEMORY_OVERLAY] = "overlay",
 202         [V4L2_MEMORY_DMABUF] = "dmabuf",
 203 };
 204
 205 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 206
 207 /* ------------------------------------------------------------------ */
 208 /* debug help functions                                               */
 209
 210 static void v4l_print_querycap(const void *arg, bool write_only)
 211 {
 212         const struct v4l2_capability *p = arg;
 213
 214         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 215                 (int)sizeof(p->driver), p->driver,
 216                 (int)sizeof(p->card), p->card,
 217                 (int)sizeof(p->bus_info), p->bus_info,
 218                 p->version, p->capabilities, p->device_caps);
 219 }
 220
 221 static void v4l_print_enuminput(const void *arg, bool write_only)
 222 {
 223         const struct v4l2_input *p = arg;
 224
 225         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 226                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 227                 p->tuner, (unsigned long long)p->std, p->status,
 228                 p->capabilities);
 229 }
 230
 231 static void v4l_print_enumoutput(const void *arg, bool write_only)
 232 {
 233         const struct v4l2_output *p = arg;
 234
 235         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 236                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 237                 p->modulator, (unsigned long long)p->std, p->capabilities);
 238 }
 239
 240 static void v4l_print_audio(const void *arg, bool write_only)
 241 {
 242         const struct v4l2_audio *p = arg;
 243
 244         if (write_only)
 245                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 246         else
 247                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 248                         p->index, (int)sizeof(p->name), p->name,
 249                         p->capability, p->mode);
 250 }
 251
 252 static void v4l_print_audioout(const void *arg, bool write_only)
 253 {
 254         const struct v4l2_audioout *p = arg;
 255
 256         if (write_only)
 257                 pr_cont("index=%u\n", p->index);
 258         else
 259                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 260                         p->index, (int)sizeof(p->name), p->name,
 261                         p->capability, p->mode);
 262 }
 263
 264 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 265 {
 266         const struct v4l2_fmtdesc *p = arg;
 267
 268         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 269                 p->index, prt_names(p->type, v4l2_type_names),
 270                 p->flags, &p->pixelformat, p->mbus_code,
 271                 (int)sizeof(p->description), p->description);
 272 }
 273
 274 static void v4l_print_format(const void *arg, bool write_only)
 275 {
 276         const struct v4l2_format *p = arg;
 277         const struct v4l2_pix_format *pix;
 278         const struct v4l2_pix_format_mplane *mp;
 279         const struct v4l2_vbi_format *vbi;
 280         const struct v4l2_sliced_vbi_format *sliced;
 281         const struct v4l2_window *win;
 282         const struct v4l2_sdr_format *sdr;
 283         const struct v4l2_meta_format *meta;
 284         u32 planes;
 285         unsigned i;
 286
 287         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 288         switch (p->type) {
 289         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 290         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 291                 pix = &p->fmt.pix;
 292                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 293                         pix->width, pix->height, &pix->pixelformat,
 294                         prt_names(pix->field, v4l2_field_names),
 295                         pix->bytesperline, pix->sizeimage,
 296                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 297                         pix->quantization, pix->xfer_func);
 298                 break;
 299         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 300         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 301                 mp = &p->fmt.pix_mp;
 302                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 303                         mp->width, mp->height, &mp->pixelformat,
 304                         prt_names(mp->field, v4l2_field_names),
 305                         mp->colorspace, mp->num_planes, mp->flags,
 306                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 307                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 308                 for (i = 0; i < planes; i++)
 309                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 310                                         mp->plane_fmt[i].bytesperline,
 311                                         mp->plane_fmt[i].sizeimage);
 312                 break;
 313         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 314         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 315                 win = &p->fmt.win;
 316                 /* Note: we can't print the clip list here since the clips
 317                  * pointer is a userspace pointer, not a kernelspace
 318                  * pointer. */
 319                 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",
 320                         win->w.width, win->w.height, win->w.left, win->w.top,
 321                         prt_names(win->field, v4l2_field_names),
 322                         win->chromakey, win->clipcount, win->clips,
 323                         win->bitmap, win->global_alpha);
 324                 break;
 325         case V4L2_BUF_TYPE_VBI_CAPTURE:
 326         case V4L2_BUF_TYPE_VBI_OUTPUT:
 327                 vbi = &p->fmt.vbi;
 328                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 329                         vbi->sampling_rate, vbi->offset,
 330                         vbi->samples_per_line, &vbi->sample_format,
 331                         vbi->start[0], vbi->start[1],
 332                         vbi->count[0], vbi->count[1]);
 333                 break;
 334         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 335         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 336                 sliced = &p->fmt.sliced;
 337                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 338                                 sliced->service_set, sliced->io_size);
 339                 for (i = 0; i < 24; i++)
 340                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 341                                 sliced->service_lines[0][i],
 342                                 sliced->service_lines[1][i]);
 343                 break;
 344         case V4L2_BUF_TYPE_SDR_CAPTURE:
 345         case V4L2_BUF_TYPE_SDR_OUTPUT:
 346                 sdr = &p->fmt.sdr;
 347                 pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat);
 348                 break;
 349         case V4L2_BUF_TYPE_META_CAPTURE:
 350         case V4L2_BUF_TYPE_META_OUTPUT:
 351                 meta = &p->fmt.meta;
 352                 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 353                         &meta->dataformat, meta->buffersize);
 354                 break;
 355         }
 356 }
 357
 358 static void v4l_print_framebuffer(const void *arg, bool write_only)
 359 {
 360         const struct v4l2_framebuffer *p = arg;
 361
 362         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 363                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 364                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 365                 p->fmt.colorspace);
 366 }
 367
 368 static void v4l_print_buftype(const void *arg, bool write_only)
 369 {
 370         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 371 }
 372
 373 static void v4l_print_modulator(const void *arg, bool write_only)
 374 {
 375         const struct v4l2_modulator *p = arg;
 376
 377         if (write_only)
 378                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 379         else
 380                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 381                         p->index, (int)sizeof(p->name), p->name, p->capability,
 382                         p->rangelow, p->rangehigh, p->txsubchans);
 383 }
 384
 385 static void v4l_print_tuner(const void *arg, bool write_only)
 386 {
 387         const struct v4l2_tuner *p = arg;
 388
 389         if (write_only)
 390                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 391         else
 392                 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",
 393                         p->index, (int)sizeof(p->name), p->name, p->type,
 394                         p->capability, p->rangelow,
 395                         p->rangehigh, p->signal, p->afc,
 396                         p->rxsubchans, p->audmode);
 397 }
 398
 399 static void v4l_print_frequency(const void *arg, bool write_only)
 400 {
 401         const struct v4l2_frequency *p = arg;
 402
 403         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 404                                 p->tuner, p->type, p->frequency);
 405 }
 406
 407 static void v4l_print_standard(const void *arg, bool write_only)
 408 {
 409         const struct v4l2_standard *p = arg;
 410
 411         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 412                 p->index,
 413                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 414                 p->frameperiod.numerator,
 415                 p->frameperiod.denominator,
 416                 p->framelines);
 417 }
 418
 419 static void v4l_print_std(const void *arg, bool write_only)
 420 {
 421         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 422 }
 423
 424 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 425 {
 426         const struct v4l2_hw_freq_seek *p = arg;
 427
 428         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 429                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 430                 p->rangelow, p->rangehigh);
 431 }
 432
 433 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 434 {
 435         const struct v4l2_requestbuffers *p = arg;
 436
 437         pr_cont("count=%d, type=%s, memory=%s\n",
 438                 p->count,
 439                 prt_names(p->type, v4l2_type_names),
 440                 prt_names(p->memory, v4l2_memory_names));
 441 }
 442
 443 static void v4l_print_buffer(const void *arg, bool write_only)
 444 {
 445         const struct v4l2_buffer *p = arg;
 446         const struct v4l2_timecode *tc = &p->timecode;
 447         const struct v4l2_plane *plane;
 448         int i;
 449
 450         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 451                         (int)p->timestamp.tv_sec / 3600,
 452                         ((int)p->timestamp.tv_sec / 60) % 60,
 453                         ((int)p->timestamp.tv_sec % 60),
 454                         (long)p->timestamp.tv_usec,
 455                         p->index,
 456                         prt_names(p->type, v4l2_type_names), p->request_fd,
 457                         p->flags, prt_names(p->field, v4l2_field_names),
 458                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 459
 460         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 461                 pr_cont("\n");
 462                 for (i = 0; i < p->length; ++i) {
 463                         plane = &p->m.planes[i];
 464                         printk(KERN_DEBUG
 465                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 466                                 i, plane->bytesused, plane->data_offset,
 467                                 plane->m.userptr, plane->length);
 468                 }
 469         } else {
 470                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 471                         p->bytesused, p->m.userptr, p->length);
 472         }
 473
 474         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 475                         tc->hours, tc->minutes, tc->seconds,
 476                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 477 }
 478
 479 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 480 {
 481         const struct v4l2_exportbuffer *p = arg;
 482
 483         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 484                 p->fd, prt_names(p->type, v4l2_type_names),
 485                 p->index, p->plane, p->flags);
 486 }
 487
 488 static void v4l_print_create_buffers(const void *arg, bool write_only)
 489 {
 490         const struct v4l2_create_buffers *p = arg;
 491
 492         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 493                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 494                 p->capabilities);
 495         v4l_print_format(&p->format, write_only);
 496 }
 497
 498 static void v4l_print_streamparm(const void *arg, bool write_only)
 499 {
 500         const struct v4l2_streamparm *p = arg;
 501
 502         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 503
 504         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 505             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 506                 const struct v4l2_captureparm *c = &p->parm.capture;
 507
 508                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 509                         c->capability, c->capturemode,
 510                         c->timeperframe.numerator, c->timeperframe.denominator,
 511                         c->extendedmode, c->readbuffers);
 512         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 513                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 514                 const struct v4l2_outputparm *c = &p->parm.output;
 515
 516                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 517                         c->capability, c->outputmode,
 518                         c->timeperframe.numerator, c->timeperframe.denominator,
 519                         c->extendedmode, c->writebuffers);
 520         } else {
 521                 pr_cont("\n");
 522         }
 523 }
 524
 525 static void v4l_print_queryctrl(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_queryctrl *p = arg;
 528
 529         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 530                         p->id, p->type, (int)sizeof(p->name), p->name,
 531                         p->minimum, p->maximum,
 532                         p->step, p->default_value, p->flags);
 533 }
 534
 535 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 536 {
 537         const struct v4l2_query_ext_ctrl *p = arg;
 538
 539         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",
 540                         p->id, p->type, (int)sizeof(p->name), p->name,
 541                         p->minimum, p->maximum,
 542                         p->step, p->default_value, p->flags,
 543                         p->elem_size, p->elems, p->nr_of_dims,
 544                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 545 }
 546
 547 static void v4l_print_querymenu(const void *arg, bool write_only)
 548 {
 549         const struct v4l2_querymenu *p = arg;
 550
 551         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 552 }
 553
 554 static void v4l_print_control(const void *arg, bool write_only)
 555 {
 556         const struct v4l2_control *p = arg;
 557         const char *name = v4l2_ctrl_get_name(p->id);
 558
 559         if (name)
 560                 pr_cont("name=%s, ", name);
 561         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 562 }
 563
 564 static void v4l_print_ext_controls(const void *arg, bool write_only)
 565 {
 566         const struct v4l2_ext_controls *p = arg;
 567         int i;
 568
 569         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 570                         p->which, p->count, p->error_idx, p->request_fd);
 571         for (i = 0; i < p->count; i++) {
 572                 unsigned int id = p->controls[i].id;
 573                 const char *name = v4l2_ctrl_get_name(id);
 574
 575                 if (name)
 576                         pr_cont(", name=%s", name);
 577                 if (!p->controls[i].size)
 578                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 579                 else
 580                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 581         }
 582         pr_cont("\n");
 583 }
 584
 585 static void v4l_print_cropcap(const void *arg, bool write_only)
 586 {
 587         const struct v4l2_cropcap *p = arg;
 588
 589         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 590                 prt_names(p->type, v4l2_type_names),
 591                 p->bounds.width, p->bounds.height,
 592                 p->bounds.left, p->bounds.top,
 593                 p->defrect.width, p->defrect.height,
 594                 p->defrect.left, p->defrect.top,
 595                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 596 }
 597
 598 static void v4l_print_crop(const void *arg, bool write_only)
 599 {
 600         const struct v4l2_crop *p = arg;
 601
 602         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 603                 prt_names(p->type, v4l2_type_names),
 604                 p->c.width, p->c.height,
 605                 p->c.left, p->c.top);
 606 }
 607
 608 static void v4l_print_selection(const void *arg, bool write_only)
 609 {
 610         const struct v4l2_selection *p = arg;
 611
 612         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 613                 prt_names(p->type, v4l2_type_names),
 614                 p->target, p->flags,
 615                 p->r.width, p->r.height, p->r.left, p->r.top);
 616 }
 617
 618 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 619 {
 620         const struct v4l2_jpegcompression *p = arg;
 621
 622         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 623                 p->quality, p->APPn, p->APP_len,
 624                 p->COM_len, p->jpeg_markers);
 625 }
 626
 627 static void v4l_print_enc_idx(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_enc_idx *p = arg;
 630
 631         pr_cont("entries=%d, entries_cap=%d\n",
 632                         p->entries, p->entries_cap);
 633 }
 634
 635 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 636 {
 637         const struct v4l2_encoder_cmd *p = arg;
 638
 639         pr_cont("cmd=%d, flags=0x%x\n",
 640                         p->cmd, p->flags);
 641 }
 642
 643 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 644 {
 645         const struct v4l2_decoder_cmd *p = arg;
 646
 647         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 648
 649         if (p->cmd == V4L2_DEC_CMD_START)
 650                 pr_info("speed=%d, format=%u\n",
 651                                 p->start.speed, p->start.format);
 652         else if (p->cmd == V4L2_DEC_CMD_STOP)
 653                 pr_info("pts=%llu\n", p->stop.pts);
 654 }
 655
 656 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_dbg_chip_info *p = arg;
 659
 660         pr_cont("type=%u, ", p->match.type);
 661         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 662                 pr_cont("name=%.*s, ",
 663                                 (int)sizeof(p->match.name), p->match.name);
 664         else
 665                 pr_cont("addr=%u, ", p->match.addr);
 666         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 667 }
 668
 669 static void v4l_print_dbg_register(const void *arg, bool write_only)
 670 {
 671         const struct v4l2_dbg_register *p = arg;
 672
 673         pr_cont("type=%u, ", p->match.type);
 674         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 675                 pr_cont("name=%.*s, ",
 676                                 (int)sizeof(p->match.name), p->match.name);
 677         else
 678                 pr_cont("addr=%u, ", p->match.addr);
 679         pr_cont("reg=0x%llx, val=0x%llx\n",
 680                         p->reg, p->val);
 681 }
 682
 683 static void v4l_print_dv_timings(const void *arg, bool write_only)
 684 {
 685         const struct v4l2_dv_timings *p = arg;
 686
 687         switch (p->type) {
 688         case V4L2_DV_BT_656_1120:
 689                 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",
 690                                 p->bt.interlaced, p->bt.pixelclock,
 691                                 p->bt.width, p->bt.height,
 692                                 p->bt.polarities, p->bt.hfrontporch,
 693                                 p->bt.hsync, p->bt.hbackporch,
 694                                 p->bt.vfrontporch, p->bt.vsync,
 695                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 696                                 p->bt.il_vsync, p->bt.il_vbackporch,
 697                                 p->bt.standards, p->bt.flags);
 698                 break;
 699         default:
 700                 pr_cont("type=%d\n", p->type);
 701                 break;
 702         }
 703 }
 704
 705 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 706 {
 707         const struct v4l2_enum_dv_timings *p = arg;
 708
 709         pr_cont("index=%u, ", p->index);
 710         v4l_print_dv_timings(&p->timings, write_only);
 711 }
 712
 713 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 714 {
 715         const struct v4l2_dv_timings_cap *p = arg;
 716
 717         switch (p->type) {
 718         case V4L2_DV_BT_656_1120:
 719                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 720                         p->bt.min_width, p->bt.max_width,
 721                         p->bt.min_height, p->bt.max_height,
 722                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 723                         p->bt.standards, p->bt.capabilities);
 724                 break;
 725         default:
 726                 pr_cont("type=%u\n", p->type);
 727                 break;
 728         }
 729 }
 730
 731 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 732 {
 733         const struct v4l2_frmsizeenum *p = arg;
 734
 735         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 736                 p->index, &p->pixel_format, p->type);
 737         switch (p->type) {
 738         case V4L2_FRMSIZE_TYPE_DISCRETE:
 739                 pr_cont(", wxh=%ux%u\n",
 740                         p->discrete.width, p->discrete.height);
 741                 break;
 742         case V4L2_FRMSIZE_TYPE_STEPWISE:
 743                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 744                                 p->stepwise.min_width,
 745                                 p->stepwise.min_height,
 746                                 p->stepwise.max_width,
 747                                 p->stepwise.max_height,
 748                                 p->stepwise.step_width,
 749                                 p->stepwise.step_height);
 750                 break;
 751         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 752         default:
 753                 pr_cont("\n");
 754                 break;
 755         }
 756 }
 757
 758 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 759 {
 760         const struct v4l2_frmivalenum *p = arg;
 761
 762         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 763                 p->index, &p->pixel_format, p->width, p->height, p->type);
 764         switch (p->type) {
 765         case V4L2_FRMIVAL_TYPE_DISCRETE:
 766                 pr_cont(", fps=%d/%d\n",
 767                                 p->discrete.numerator,
 768                                 p->discrete.denominator);
 769                 break;
 770         case V4L2_FRMIVAL_TYPE_STEPWISE:
 771                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 772                                 p->stepwise.min.numerator,
 773                                 p->stepwise.min.denominator,
 774                                 p->stepwise.max.numerator,
 775                                 p->stepwise.max.denominator,
 776                                 p->stepwise.step.numerator,
 777                                 p->stepwise.step.denominator);
 778                 break;
 779         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 780         default:
 781                 pr_cont("\n");
 782                 break;
 783         }
 784 }
 785
 786 static void v4l_print_event(const void *arg, bool write_only)
 787 {
 788         const struct v4l2_event *p = arg;
 789         const struct v4l2_event_ctrl *c;
 790
 791         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 792                         p->type, p->pending, p->sequence, p->id,
 793                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 794         switch (p->type) {
 795         case V4L2_EVENT_VSYNC:
 796                 printk(KERN_DEBUG "field=%s\n",
 797                         prt_names(p->u.vsync.field, v4l2_field_names));
 798                 break;
 799         case V4L2_EVENT_CTRL:
 800                 c = &p->u.ctrl;
 801                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 802                         c->changes, c->type);
 803                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 804                         pr_cont("value64=%lld, ", c->value64);
 805                 else
 806                         pr_cont("value=%d, ", c->value);
 807                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 808                         c->flags, c->minimum, c->maximum,
 809                         c->step, c->default_value);
 810                 break;
 811         case V4L2_EVENT_FRAME_SYNC:
 812                 pr_cont("frame_sequence=%u\n",
 813                         p->u.frame_sync.frame_sequence);
 814                 break;
 815         }
 816 }
 817
 818 static void v4l_print_event_subscription(const void *arg, bool write_only)
 819 {
 820         const struct v4l2_event_subscription *p = arg;
 821
 822         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 823                         p->type, p->id, p->flags);
 824 }
 825
 826 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 827 {
 828         const struct v4l2_sliced_vbi_cap *p = arg;
 829         int i;
 830
 831         pr_cont("type=%s, service_set=0x%08x\n",
 832                         prt_names(p->type, v4l2_type_names), p->service_set);
 833         for (i = 0; i < 24; i++)
 834                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 835                                 p->service_lines[0][i],
 836                                 p->service_lines[1][i]);
 837 }
 838
 839 static void v4l_print_freq_band(const void *arg, bool write_only)
 840 {
 841         const struct v4l2_frequency_band *p = arg;
 842
 843         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 844                         p->tuner, p->type, p->index,
 845                         p->capability, p->rangelow,
 846                         p->rangehigh, p->modulation);
 847 }
 848
 849 static void v4l_print_edid(const void *arg, bool write_only)
 850 {
 851         const struct v4l2_edid *p = arg;
 852
 853         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 854                 p->pad, p->start_block, p->blocks);
 855 }
 856
 857 static void v4l_print_u32(const void *arg, bool write_only)
 858 {
 859         pr_cont("value=%u\n", *(const u32 *)arg);
 860 }
 861
 862 static void v4l_print_newline(const void *arg, bool write_only)
 863 {
 864         pr_cont("\n");
 865 }
 866
 867 static void v4l_print_default(const void *arg, bool write_only)
 868 {
 869         pr_cont("driver-specific ioctl\n");
 870 }
 871
 872 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 873 {
 874         __u32 i;
 875
 876         /* zero the reserved fields */
 877         c->reserved[0] = 0;
 878         for (i = 0; i < c->count; i++)
 879                 c->controls[i].reserved2[0] = 0;
 880
 881         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 882            when using extended controls.
 883            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 884            is it allowed for backwards compatibility.
 885          */
 886         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 887                 return 0;
 888         if (!c->which)
 889                 return 1;
 890         /* Check that all controls are from the same control class. */
 891         for (i = 0; i < c->count; i++) {
 892                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 893                         c->error_idx = i;
 894                         return 0;
 895                 }
 896         }
 897         return 1;
 898 }
 899
 900 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 901 {
 902         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 903                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 904                              V4L2_CAP_VIDEO_OUTPUT |
 905                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 906                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 907         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 908                               V4L2_CAP_META_OUTPUT;
 909         struct video_device *vfd = video_devdata(file);
 910         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 911         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 912                       (vfd->device_caps & vid_caps);
 913         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 914         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 915         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 916         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 917                        (vfd->device_caps & meta_caps);
 918         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 919         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 920
 921         if (ops == NULL)
 922                 return -EINVAL;
 923
 924         switch (type) {
 925         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 926                 if ((is_vid || is_tch) && is_rx &&
 927                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 928                         return 0;
 929                 break;
 930         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 931                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 932                         return 0;
 933                 break;
 934         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 935                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 936                         return 0;
 937                 break;
 938         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 939                 if (is_vid && is_tx &&
 940                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 941                         return 0;
 942                 break;
 943         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 944                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 945                         return 0;
 946                 break;
 947         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 948                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 949                         return 0;
 950                 break;
 951         case V4L2_BUF_TYPE_VBI_CAPTURE:
 952                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 953                         return 0;
 954                 break;
 955         case V4L2_BUF_TYPE_VBI_OUTPUT:
 956                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 957                         return 0;
 958                 break;
 959         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 960                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 961                         return 0;
 962                 break;
 963         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 964                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 965                         return 0;
 966                 break;
 967         case V4L2_BUF_TYPE_SDR_CAPTURE:
 968                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 969                         return 0;
 970                 break;
 971         case V4L2_BUF_TYPE_SDR_OUTPUT:
 972                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 973                         return 0;
 974                 break;
 975         case V4L2_BUF_TYPE_META_CAPTURE:
 976                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 977                         return 0;
 978                 break;
 979         case V4L2_BUF_TYPE_META_OUTPUT:
 980                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 981                         return 0;
 982                 break;
 983         default:
 984                 break;
 985         }
 986         return -EINVAL;
 987 }
 988
 989 static void v4l_sanitize_format(struct v4l2_format *fmt)
 990 {
 991         unsigned int offset;
 992
 993         /* Make sure num_planes is not bogus */
 994         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
 995             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 996                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
 997                                                VIDEO_MAX_PLANES);
 998
 999         /*
1000          * The v4l2_pix_format structure has been extended with fields that were
1001          * not previously required to be set to zero by applications. The priv
1002          * field, when set to a magic value, indicates the the extended fields
1003          * are valid. Otherwise they will contain undefined values. To simplify
1004          * the API towards drivers zero the extended fields and set the priv
1005          * field to the magic value when the extended pixel format structure
1006          * isn't used by applications.
1007          */
1008
1009         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1010             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1011                 return;
1012
1013         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1014                 return;
1015
1016         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1017
1018         offset = offsetof(struct v4l2_pix_format, priv)
1019                + sizeof(fmt->fmt.pix.priv);
1020         memset(((void *)&fmt->fmt.pix) + offset, 0,
1021                sizeof(fmt->fmt.pix) - offset);
1022 }
1023
1024 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1025                                 struct file *file, void *fh, void *arg)
1026 {
1027         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1028         struct video_device *vfd = video_devdata(file);
1029         int ret;
1030
1031         cap->version = LINUX_VERSION_CODE;
1032         cap->device_caps = vfd->device_caps;
1033         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1034
1035         ret = ops->vidioc_querycap(file, fh, cap);
1036
1037         /*
1038          * Drivers must not change device_caps, so check for this and
1039          * warn if this happened.
1040          */
1041         WARN_ON(cap->device_caps != vfd->device_caps);
1042         /*
1043          * Check that capabilities is a superset of
1044          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1045          */
1046         WARN_ON((cap->capabilities &
1047                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1048                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1049         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1050         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1051
1052         return ret;
1053 }
1054
1055 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1056                        struct file *file, void *fh, void *arg)
1057 {
1058         struct video_device *vfd = video_devdata(file);
1059
1060         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1061                 *(int *)arg = 0;
1062                 return 0;
1063         }
1064
1065         return ops->vidioc_g_input(file, fh, arg);
1066 }
1067
1068 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1069                         struct file *file, void *fh, void *arg)
1070 {
1071         struct video_device *vfd = video_devdata(file);
1072
1073         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1074                 *(int *)arg = 0;
1075                 return 0;
1076         }
1077
1078         return ops->vidioc_g_output(file, fh, arg);
1079 }
1080
1081 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1082                                 struct file *file, void *fh, void *arg)
1083 {
1084         struct video_device *vfd = video_devdata(file);
1085         int ret;
1086
1087         ret = v4l_enable_media_source(vfd);
1088         if (ret)
1089                 return ret;
1090
1091         if (vfd->device_caps & V4L2_CAP_IO_MC)
1092                 return  *(int *)arg ? -EINVAL : 0;
1093
1094         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1095 }
1096
1097 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1098                                 struct file *file, void *fh, void *arg)
1099 {
1100         struct video_device *vfd = video_devdata(file);
1101
1102         if (vfd->device_caps & V4L2_CAP_IO_MC)
1103                 return  *(int *)arg ? -EINVAL : 0;
1104
1105         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1106 }
1107
1108 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1109                                 struct file *file, void *fh, void *arg)
1110 {
1111         struct video_device *vfd;
1112         u32 *p = arg;
1113
1114         vfd = video_devdata(file);
1115         *p = v4l2_prio_max(vfd->prio);
1116         return 0;
1117 }
1118
1119 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1120                                 struct file *file, void *fh, void *arg)
1121 {
1122         struct video_device *vfd;
1123         struct v4l2_fh *vfh;
1124         u32 *p = arg;
1125
1126         vfd = video_devdata(file);
1127         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1128                 return -ENOTTY;
1129         vfh = file->private_data;
1130         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1131 }
1132
1133 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1134                                 struct file *file, void *fh, void *arg)
1135 {
1136         struct video_device *vfd = video_devdata(file);
1137         struct v4l2_input *p = arg;
1138
1139         /*
1140          * We set the flags for CAP_DV_TIMINGS &
1141          * CAP_STD here based on ioctl handler provided by the
1142          * driver. If the driver doesn't support these
1143          * for a specific input, it must override these flags.
1144          */
1145         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1146                 p->capabilities |= V4L2_IN_CAP_STD;
1147
1148         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1149                 if (p->index)
1150                         return -EINVAL;
1151                 strscpy(p->name, vfd->name, sizeof(p->name));
1152                 p->type = V4L2_INPUT_TYPE_CAMERA;
1153                 return 0;
1154         }
1155
1156         return ops->vidioc_enum_input(file, fh, p);
1157 }
1158
1159 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1160                                 struct file *file, void *fh, void *arg)
1161 {
1162         struct video_device *vfd = video_devdata(file);
1163         struct v4l2_output *p = arg;
1164
1165         /*
1166          * We set the flags for CAP_DV_TIMINGS &
1167          * CAP_STD here based on ioctl handler provided by the
1168          * driver. If the driver doesn't support these
1169          * for a specific output, it must override these flags.
1170          */
1171         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1172                 p->capabilities |= V4L2_OUT_CAP_STD;
1173
1174         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1175                 if (p->index)
1176                         return -EINVAL;
1177                 strscpy(p->name, vfd->name, sizeof(p->name));
1178                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1179                 return 0;
1180         }
1181
1182         return ops->vidioc_enum_output(file, fh, p);
1183 }
1184
1185 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1186 {
1187         const unsigned sz = sizeof(fmt->description);
1188         const char *descr = NULL;
1189         u32 flags = 0;
1190
1191         /*
1192          * We depart from the normal coding style here since the descriptions
1193          * should be aligned so it is easy to see which descriptions will be
1194          * longer than 31 characters (the max length for a description).
1195          * And frankly, this is easier to read anyway.
1196          *
1197          * Note that gcc will use O(log N) comparisons to find the right case.
1198          */
1199         switch (fmt->pixelformat) {
1200         /* Max description length mask: descr = "0123456789012345678901234567890" */
1201         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1202         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1203         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1204         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1205         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1206         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1207         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1208         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1209         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1210         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1211         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1212         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1213         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1214         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1215         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1216         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1217         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1218         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1219         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1220         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1221         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1222         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1223         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1224         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1225         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1226         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1227         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1228         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1229         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1230         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1231         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1232         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1233         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1234         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1235         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1236         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1237         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1238         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1239         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1240         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1241         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1242         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1243         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1244         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1245         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1246         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1247         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1248         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1249         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1250         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1251         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1252         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1253         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1254         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1255         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1256         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1257         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1258         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1259         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1260         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1261         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1262         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1263         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1264         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1265         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1266         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1267         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1268         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1269         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1270         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1271         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1272         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1273         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1274         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1275         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1276         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1277         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1278         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1279         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1280         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1281         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1282         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1283         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1284         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1285         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1286         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1287         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1288         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1289         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1290         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1291         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1292         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1293         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1294         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1295         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1296         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1297         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1298         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1299         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1300         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1301         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1302         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1303         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1304         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1305         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1306         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1307         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1308         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1309         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1310         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1311         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1312         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1313         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1314         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1315         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1316         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1317         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1318         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1319         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1320         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1321         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1322         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1323         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1324         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1325         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1326         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1327         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1328         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1329         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1330         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1331         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1332         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1333         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1334         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1335         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1336         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1337         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1338         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1339         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1340         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1341         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1342         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1343         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1344         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1345         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1346         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1347         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1348         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1349         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1350         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1351         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1352         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1353         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1354         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1355         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1356         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1357         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1358         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1359         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1360         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1361         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1362         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1363         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1364         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1365         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1366         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1367         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1368         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1369         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1370
1371         default:
1372                 /* Compressed formats */
1373                 flags = V4L2_FMT_FLAG_COMPRESSED;
1374                 switch (fmt->pixelformat) {
1375                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1376                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1377                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1378                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1379                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1380                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1381                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1382                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1383                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1384                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1385                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1386                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1387                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1388                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1389                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1390                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1391                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1392                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1393                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1394                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1395                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1396                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1397                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1398                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1399                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1400                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1401                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1402                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1403                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1404                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1405                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1406                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1407                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1408                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1409                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1410                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1411                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1412                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1413                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1414                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1415                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1416                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1417                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1418                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1419                 default:
1420                         if (fmt->description[0])
1421                                 return;
1422                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1423                         flags = 0;
1424                         snprintf(fmt->description, sz, "%p4cc",
1425                                  &fmt->pixelformat);
1426                         break;
1427                 }
1428         }
1429
1430         if (descr)
1431                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1432         fmt->flags |= flags;
1433 }
1434
1435 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1436                                 struct file *file, void *fh, void *arg)
1437 {
1438         struct video_device *vdev = video_devdata(file);
1439         struct v4l2_fmtdesc *p = arg;
1440         int ret = check_fmt(file, p->type);
1441         u32 mbus_code;
1442         u32 cap_mask;
1443
1444         if (ret)
1445                 return ret;
1446         ret = -EINVAL;
1447
1448         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1449                 p->mbus_code = 0;
1450
1451         mbus_code = p->mbus_code;
1452         CLEAR_AFTER_FIELD(p, type);
1453         p->mbus_code = mbus_code;
1454
1455         switch (p->type) {
1456         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1457         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1458                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1459                            V4L2_CAP_VIDEO_M2M_MPLANE;
1460                 if (!!(vdev->device_caps & cap_mask) !=
1461                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1462                         break;
1463
1464                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1465                         break;
1466                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1467                 break;
1468         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1469                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1470                         break;
1471                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1472                 break;
1473         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1474         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1475                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1476                            V4L2_CAP_VIDEO_M2M_MPLANE;
1477                 if (!!(vdev->device_caps & cap_mask) !=
1478                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1479                         break;
1480
1481                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1482                         break;
1483                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1484                 break;
1485         case V4L2_BUF_TYPE_SDR_CAPTURE:
1486                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1487                         break;
1488                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1489                 break;
1490         case V4L2_BUF_TYPE_SDR_OUTPUT:
1491                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1492                         break;
1493                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1494                 break;
1495         case V4L2_BUF_TYPE_META_CAPTURE:
1496                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1497                         break;
1498                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1499                 break;
1500         case V4L2_BUF_TYPE_META_OUTPUT:
1501                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1502                         break;
1503                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1504                 break;
1505         }
1506         if (ret == 0)
1507                 v4l_fill_fmtdesc(p);
1508         return ret;
1509 }
1510
1511 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1512 {
1513         /*
1514          * The v4l2_pix_format structure contains fields that make no sense for
1515          * touch. Set them to default values in this case.
1516          */
1517
1518         p->field = V4L2_FIELD_NONE;
1519         p->colorspace = V4L2_COLORSPACE_RAW;
1520         p->flags = 0;
1521         p->ycbcr_enc = 0;
1522         p->quantization = 0;
1523         p->xfer_func = 0;
1524 }
1525
1526 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1527                                 struct file *file, void *fh, void *arg)
1528 {
1529         struct v4l2_format *p = arg;
1530         struct video_device *vfd = video_devdata(file);
1531         int ret = check_fmt(file, p->type);
1532
1533         if (ret)
1534                 return ret;
1535
1536         /*
1537          * fmt can't be cleared for these overlay types due to the 'clips'
1538          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1539          * Those are provided by the user. So handle these two overlay types
1540          * first, and then just do a simple memset for the other types.
1541          */
1542         switch (p->type) {
1543         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1544         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1545                 struct v4l2_clip *clips = p->fmt.win.clips;
1546                 u32 clipcount = p->fmt.win.clipcount;
1547                 void __user *bitmap = p->fmt.win.bitmap;
1548
1549                 memset(&p->fmt, 0, sizeof(p->fmt));
1550                 p->fmt.win.clips = clips;
1551                 p->fmt.win.clipcount = clipcount;
1552                 p->fmt.win.bitmap = bitmap;
1553                 break;
1554         }
1555         default:
1556                 memset(&p->fmt, 0, sizeof(p->fmt));
1557                 break;
1558         }
1559
1560         switch (p->type) {
1561         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1562                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1563                         break;
1564                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1565                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1566                 /* just in case the driver zeroed it again */
1567                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1568                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1569                         v4l_pix_format_touch(&p->fmt.pix);
1570                 return ret;
1571         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1572                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1573         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1574                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1575         case V4L2_BUF_TYPE_VBI_CAPTURE:
1576                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1577         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1578                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1579         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1580                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1581                         break;
1582                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1583                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1584                 /* just in case the driver zeroed it again */
1585                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1586                 return ret;
1587         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1588                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1589         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1590                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1591         case V4L2_BUF_TYPE_VBI_OUTPUT:
1592                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1593         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1594                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1595         case V4L2_BUF_TYPE_SDR_CAPTURE:
1596                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1597         case V4L2_BUF_TYPE_SDR_OUTPUT:
1598                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1599         case V4L2_BUF_TYPE_META_CAPTURE:
1600                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1601         case V4L2_BUF_TYPE_META_OUTPUT:
1602                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1603         }
1604         return -EINVAL;
1605 }
1606
1607 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1608                                 struct file *file, void *fh, void *arg)
1609 {
1610         struct v4l2_format *p = arg;
1611         struct video_device *vfd = video_devdata(file);
1612         int ret = check_fmt(file, p->type);
1613         unsigned int i;
1614
1615         if (ret)
1616                 return ret;
1617
1618         ret = v4l_enable_media_source(vfd);
1619         if (ret)
1620                 return ret;
1621         v4l_sanitize_format(p);
1622
1623         switch (p->type) {
1624         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1625                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1626                         break;
1627                 CLEAR_AFTER_FIELD(p, fmt.pix);
1628                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1629                 /* just in case the driver zeroed it again */
1630                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1631                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1632                         v4l_pix_format_touch(&p->fmt.pix);
1633                 return ret;
1634         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1635                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1636                         break;
1637                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1638                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1639                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1640                                           bytesperline);
1641                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1642         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1643                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1644                         break;
1645                 CLEAR_AFTER_FIELD(p, fmt.win);
1646                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1647         case V4L2_BUF_TYPE_VBI_CAPTURE:
1648                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1649                         break;
1650                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1651                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1652         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1653                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1654                         break;
1655                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1656                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1657         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1658                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1659                         break;
1660                 CLEAR_AFTER_FIELD(p, fmt.pix);
1661                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1662                 /* just in case the driver zeroed it again */
1663                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1664                 return ret;
1665         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1666                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1667                         break;
1668                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1669                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1670                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1671                                           bytesperline);
1672                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1673         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1674                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.win);
1677                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1678         case V4L2_BUF_TYPE_VBI_OUTPUT:
1679                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1680                         break;
1681                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1682                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1683         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1684                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1685                         break;
1686                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1687                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1688         case V4L2_BUF_TYPE_SDR_CAPTURE:
1689                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1690                         break;
1691                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1692                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1693         case V4L2_BUF_TYPE_SDR_OUTPUT:
1694                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1695                         break;
1696                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1697                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1698         case V4L2_BUF_TYPE_META_CAPTURE:
1699                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1700                         break;
1701                 CLEAR_AFTER_FIELD(p, fmt.meta);
1702                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1703         case V4L2_BUF_TYPE_META_OUTPUT:
1704                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1705                         break;
1706                 CLEAR_AFTER_FIELD(p, fmt.meta);
1707                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1708         }
1709         return -EINVAL;
1710 }
1711
1712 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1713                                 struct file *file, void *fh, void *arg)
1714 {
1715         struct v4l2_format *p = arg;
1716         struct video_device *vfd = video_devdata(file);
1717         int ret = check_fmt(file, p->type);
1718         unsigned int i;
1719
1720         if (ret)
1721                 return ret;
1722
1723         v4l_sanitize_format(p);
1724
1725         switch (p->type) {
1726         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1727                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1728                         break;
1729                 CLEAR_AFTER_FIELD(p, fmt.pix);
1730                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1731                 /* just in case the driver zeroed it again */
1732                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1733                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1734                         v4l_pix_format_touch(&p->fmt.pix);
1735                 return ret;
1736         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1737                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1738                         break;
1739                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1740                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1741                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1742                                           bytesperline);
1743                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1744         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1745                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1746                         break;
1747                 CLEAR_AFTER_FIELD(p, fmt.win);
1748                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1749         case V4L2_BUF_TYPE_VBI_CAPTURE:
1750                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1751                         break;
1752                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1753                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1754         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1755                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1756                         break;
1757                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1758                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1759         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1760                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1761                         break;
1762                 CLEAR_AFTER_FIELD(p, fmt.pix);
1763                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1764                 /* just in case the driver zeroed it again */
1765                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1766                 return ret;
1767         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1768                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1769                         break;
1770                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1771                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1772                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1773                                           bytesperline);
1774                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1775         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1776                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1777                         break;
1778                 CLEAR_AFTER_FIELD(p, fmt.win);
1779                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1780         case V4L2_BUF_TYPE_VBI_OUTPUT:
1781                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1782                         break;
1783                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1784                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1785         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1786                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1787                         break;
1788                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1789                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1790         case V4L2_BUF_TYPE_SDR_CAPTURE:
1791                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1792                         break;
1793                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1794                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1795         case V4L2_BUF_TYPE_SDR_OUTPUT:
1796                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1797                         break;
1798                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1799                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1800         case V4L2_BUF_TYPE_META_CAPTURE:
1801                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1802                         break;
1803                 CLEAR_AFTER_FIELD(p, fmt.meta);
1804                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1805         case V4L2_BUF_TYPE_META_OUTPUT:
1806                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1807                         break;
1808                 CLEAR_AFTER_FIELD(p, fmt.meta);
1809                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1810         }
1811         return -EINVAL;
1812 }
1813
1814 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1815                                 struct file *file, void *fh, void *arg)
1816 {
1817         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1818 }
1819
1820 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1821                                 struct file *file, void *fh, void *arg)
1822 {
1823         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1824 }
1825
1826 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1827                                 struct file *file, void *fh, void *arg)
1828 {
1829         struct video_device *vfd = video_devdata(file);
1830         struct v4l2_tuner *p = arg;
1831         int err;
1832
1833         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1834                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1835         err = ops->vidioc_g_tuner(file, fh, p);
1836         if (!err)
1837                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1838         return err;
1839 }
1840
1841 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1842                                 struct file *file, void *fh, void *arg)
1843 {
1844         struct video_device *vfd = video_devdata(file);
1845         struct v4l2_tuner *p = arg;
1846         int ret;
1847
1848         ret = v4l_enable_media_source(vfd);
1849         if (ret)
1850                 return ret;
1851         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1852                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1853         return ops->vidioc_s_tuner(file, fh, p);
1854 }
1855
1856 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1857                                 struct file *file, void *fh, void *arg)
1858 {
1859         struct video_device *vfd = video_devdata(file);
1860         struct v4l2_modulator *p = arg;
1861         int err;
1862
1863         if (vfd->vfl_type == VFL_TYPE_RADIO)
1864                 p->type = V4L2_TUNER_RADIO;
1865
1866         err = ops->vidioc_g_modulator(file, fh, p);
1867         if (!err)
1868                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1869         return err;
1870 }
1871
1872 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1873                                 struct file *file, void *fh, void *arg)
1874 {
1875         struct video_device *vfd = video_devdata(file);
1876         struct v4l2_modulator *p = arg;
1877
1878         if (vfd->vfl_type == VFL_TYPE_RADIO)
1879                 p->type = V4L2_TUNER_RADIO;
1880
1881         return ops->vidioc_s_modulator(file, fh, p);
1882 }
1883
1884 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1885                                 struct file *file, void *fh, void *arg)
1886 {
1887         struct video_device *vfd = video_devdata(file);
1888         struct v4l2_frequency *p = arg;
1889
1890         if (vfd->vfl_type == VFL_TYPE_SDR)
1891                 p->type = V4L2_TUNER_SDR;
1892         else
1893                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1894                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1895         return ops->vidioc_g_frequency(file, fh, p);
1896 }
1897
1898 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1899                                 struct file *file, void *fh, void *arg)
1900 {
1901         struct video_device *vfd = video_devdata(file);
1902         const struct v4l2_frequency *p = arg;
1903         enum v4l2_tuner_type type;
1904         int ret;
1905
1906         ret = v4l_enable_media_source(vfd);
1907         if (ret)
1908                 return ret;
1909         if (vfd->vfl_type == VFL_TYPE_SDR) {
1910                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1911                         return -EINVAL;
1912         } else {
1913                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1914                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1915                 if (type != p->type)
1916                         return -EINVAL;
1917         }
1918         return ops->vidioc_s_frequency(file, fh, p);
1919 }
1920
1921 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1922                                 struct file *file, void *fh, void *arg)
1923 {
1924         struct video_device *vfd = video_devdata(file);
1925         struct v4l2_standard *p = arg;
1926
1927         return v4l_video_std_enumstd(p, vfd->tvnorms);
1928 }
1929
1930 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1931                                 struct file *file, void *fh, void *arg)
1932 {
1933         struct video_device *vfd = video_devdata(file);
1934         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1935         int ret;
1936
1937         ret = v4l_enable_media_source(vfd);
1938         if (ret)
1939                 return ret;
1940         norm = id & vfd->tvnorms;
1941         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1942                 return -EINVAL;
1943
1944         /* Calls the specific handler */
1945         return ops->vidioc_s_std(file, fh, norm);
1946 }
1947
1948 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1949                                 struct file *file, void *fh, void *arg)
1950 {
1951         struct video_device *vfd = video_devdata(file);
1952         v4l2_std_id *p = arg;
1953         int ret;
1954
1955         ret = v4l_enable_media_source(vfd);
1956         if (ret)
1957                 return ret;
1958         /*
1959          * If no signal is detected, then the driver should return
1960          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1961          * any standards that do not apply removed.
1962          *
1963          * This means that tuners, audio and video decoders can join
1964          * their efforts to improve the standards detection.
1965          */
1966         *p = vfd->tvnorms;
1967         return ops->vidioc_querystd(file, fh, arg);
1968 }
1969
1970 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1971                                 struct file *file, void *fh, void *arg)
1972 {
1973         struct video_device *vfd = video_devdata(file);
1974         struct v4l2_hw_freq_seek *p = arg;
1975         enum v4l2_tuner_type type;
1976         int ret;
1977
1978         ret = v4l_enable_media_source(vfd);
1979         if (ret)
1980                 return ret;
1981         /* s_hw_freq_seek is not supported for SDR for now */
1982         if (vfd->vfl_type == VFL_TYPE_SDR)
1983                 return -EINVAL;
1984
1985         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1986                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1987         if (p->type != type)
1988                 return -EINVAL;
1989         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1990 }
1991
1992 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1993                                 struct file *file, void *fh, void *arg)
1994 {
1995         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1996 }
1997
1998 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1999                                 struct file *file, void *fh, void *arg)
2000 {
2001         struct v4l2_requestbuffers *p = arg;
2002         int ret = check_fmt(file, p->type);
2003
2004         if (ret)
2005                 return ret;
2006
2007         CLEAR_AFTER_FIELD(p, capabilities);
2008
2009         return ops->vidioc_reqbufs(file, fh, p);
2010 }
2011
2012 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2013                                 struct file *file, void *fh, void *arg)
2014 {
2015         struct v4l2_buffer *p = arg;
2016         int ret = check_fmt(file, p->type);
2017
2018         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2019 }
2020
2021 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2022                                 struct file *file, void *fh, void *arg)
2023 {
2024         struct v4l2_buffer *p = arg;
2025         int ret = check_fmt(file, p->type);
2026
2027         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2028 }
2029
2030 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2031                                 struct file *file, void *fh, void *arg)
2032 {
2033         struct v4l2_buffer *p = arg;
2034         int ret = check_fmt(file, p->type);
2035
2036         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2037 }
2038
2039 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2040                                 struct file *file, void *fh, void *arg)
2041 {
2042         struct v4l2_create_buffers *create = arg;
2043         int ret = check_fmt(file, create->format.type);
2044
2045         if (ret)
2046                 return ret;
2047
2048         CLEAR_AFTER_FIELD(create, capabilities);
2049
2050         v4l_sanitize_format(&create->format);
2051
2052         ret = ops->vidioc_create_bufs(file, fh, create);
2053
2054         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2055             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2056                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2057
2058         return ret;
2059 }
2060
2061 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2062                                 struct file *file, void *fh, void *arg)
2063 {
2064         struct v4l2_buffer *b = arg;
2065         int ret = check_fmt(file, b->type);
2066
2067         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2068 }
2069
2070 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2071                                 struct file *file, void *fh, void *arg)
2072 {
2073         struct v4l2_streamparm *p = arg;
2074         v4l2_std_id std;
2075         int ret = check_fmt(file, p->type);
2076
2077         if (ret)
2078                 return ret;
2079         if (ops->vidioc_g_parm)
2080                 return ops->vidioc_g_parm(file, fh, p);
2081         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2082             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2083                 return -EINVAL;
2084         p->parm.capture.readbuffers = 2;
2085         ret = ops->vidioc_g_std(file, fh, &std);
2086         if (ret == 0)
2087                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2088         return ret;
2089 }
2090
2091 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2092                                 struct file *file, void *fh, void *arg)
2093 {
2094         struct v4l2_streamparm *p = arg;
2095         int ret = check_fmt(file, p->type);
2096
2097         if (ret)
2098                 return ret;
2099
2100         /* Note: extendedmode is never used in drivers */
2101         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2102                 memset(p->parm.output.reserved, 0,
2103                        sizeof(p->parm.output.reserved));
2104                 p->parm.output.extendedmode = 0;
2105                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2106         } else {
2107                 memset(p->parm.capture.reserved, 0,
2108                        sizeof(p->parm.capture.reserved));
2109                 p->parm.capture.extendedmode = 0;
2110                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2111         }
2112         return ops->vidioc_s_parm(file, fh, p);
2113 }
2114
2115 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2116                                 struct file *file, void *fh, void *arg)
2117 {
2118         struct video_device *vfd = video_devdata(file);
2119         struct v4l2_queryctrl *p = arg;
2120         struct v4l2_fh *vfh =
2121                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2122
2123         if (vfh && vfh->ctrl_handler)
2124                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2125         if (vfd->ctrl_handler)
2126                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2127         if (ops->vidioc_queryctrl)
2128                 return ops->vidioc_queryctrl(file, fh, p);
2129         return -ENOTTY;
2130 }
2131
2132 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2133                                 struct file *file, void *fh, void *arg)
2134 {
2135         struct video_device *vfd = video_devdata(file);
2136         struct v4l2_query_ext_ctrl *p = arg;
2137         struct v4l2_fh *vfh =
2138                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2139
2140         if (vfh && vfh->ctrl_handler)
2141                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2142         if (vfd->ctrl_handler)
2143                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2144         if (ops->vidioc_query_ext_ctrl)
2145                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2146         return -ENOTTY;
2147 }
2148
2149 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2150                                 struct file *file, void *fh, void *arg)
2151 {
2152         struct video_device *vfd = video_devdata(file);
2153         struct v4l2_querymenu *p = arg;
2154         struct v4l2_fh *vfh =
2155                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2156
2157         if (vfh && vfh->ctrl_handler)
2158                 return v4l2_querymenu(vfh->ctrl_handler, p);
2159         if (vfd->ctrl_handler)
2160                 return v4l2_querymenu(vfd->ctrl_handler, p);
2161         if (ops->vidioc_querymenu)
2162                 return ops->vidioc_querymenu(file, fh, p);
2163         return -ENOTTY;
2164 }
2165
2166 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2167                                 struct file *file, void *fh, void *arg)
2168 {
2169         struct video_device *vfd = video_devdata(file);
2170         struct v4l2_control *p = arg;
2171         struct v4l2_fh *vfh =
2172                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2173         struct v4l2_ext_controls ctrls;
2174         struct v4l2_ext_control ctrl;
2175
2176         if (vfh && vfh->ctrl_handler)
2177                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2178         if (vfd->ctrl_handler)
2179                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2180         if (ops->vidioc_g_ctrl)
2181                 return ops->vidioc_g_ctrl(file, fh, p);
2182         if (ops->vidioc_g_ext_ctrls == NULL)
2183                 return -ENOTTY;
2184
2185         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2186         ctrls.count = 1;
2187         ctrls.controls = &ctrl;
2188         ctrl.id = p->id;
2189         ctrl.value = p->value;
2190         if (check_ext_ctrls(&ctrls, 1)) {
2191                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2192
2193                 if (ret == 0)
2194                         p->value = ctrl.value;
2195                 return ret;
2196         }
2197         return -EINVAL;
2198 }
2199
2200 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2201                                 struct file *file, void *fh, void *arg)
2202 {
2203         struct video_device *vfd = video_devdata(file);
2204         struct v4l2_control *p = arg;
2205         struct v4l2_fh *vfh =
2206                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2207         struct v4l2_ext_controls ctrls;
2208         struct v4l2_ext_control ctrl;
2209
2210         if (vfh && vfh->ctrl_handler)
2211                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2212         if (vfd->ctrl_handler)
2213                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2214         if (ops->vidioc_s_ctrl)
2215                 return ops->vidioc_s_ctrl(file, fh, p);
2216         if (ops->vidioc_s_ext_ctrls == NULL)
2217                 return -ENOTTY;
2218
2219         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2220         ctrls.count = 1;
2221         ctrls.controls = &ctrl;
2222         ctrl.id = p->id;
2223         ctrl.value = p->value;
2224         if (check_ext_ctrls(&ctrls, 1))
2225                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2226         return -EINVAL;
2227 }
2228
2229 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2230                                 struct file *file, void *fh, void *arg)
2231 {
2232         struct video_device *vfd = video_devdata(file);
2233         struct v4l2_ext_controls *p = arg;
2234         struct v4l2_fh *vfh =
2235                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2236
2237         p->error_idx = p->count;
2238         if (vfh && vfh->ctrl_handler)
2239                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2240                                         vfd, vfd->v4l2_dev->mdev, p);
2241         if (vfd->ctrl_handler)
2242                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2243                                         vfd, vfd->v4l2_dev->mdev, p);
2244         if (ops->vidioc_g_ext_ctrls == NULL)
2245                 return -ENOTTY;
2246         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2247                                         -EINVAL;
2248 }
2249
2250 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2251                                 struct file *file, void *fh, void *arg)
2252 {
2253         struct video_device *vfd = video_devdata(file);
2254         struct v4l2_ext_controls *p = arg;
2255         struct v4l2_fh *vfh =
2256                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2257
2258         p->error_idx = p->count;
2259         if (vfh && vfh->ctrl_handler)
2260                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2261                                         vfd, vfd->v4l2_dev->mdev, p);
2262         if (vfd->ctrl_handler)
2263                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2264                                         vfd, vfd->v4l2_dev->mdev, p);
2265         if (ops->vidioc_s_ext_ctrls == NULL)
2266                 return -ENOTTY;
2267         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2268                                         -EINVAL;
2269 }
2270
2271 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2272                                 struct file *file, void *fh, void *arg)
2273 {
2274         struct video_device *vfd = video_devdata(file);
2275         struct v4l2_ext_controls *p = arg;
2276         struct v4l2_fh *vfh =
2277                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2278
2279         p->error_idx = p->count;
2280         if (vfh && vfh->ctrl_handler)
2281                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2282                                           vfd, vfd->v4l2_dev->mdev, p);
2283         if (vfd->ctrl_handler)
2284                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2285                                           vfd, vfd->v4l2_dev->mdev, p);
2286         if (ops->vidioc_try_ext_ctrls == NULL)
2287                 return -ENOTTY;
2288         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2289                                         -EINVAL;
2290 }
2291
2292 /*
2293  * The selection API specified originally that the _MPLANE buffer types
2294  * shouldn't be used. The reasons for this are lost in the mists of time
2295  * (or just really crappy memories). Regardless, this is really annoying
2296  * for userspace. So to keep things simple we map _MPLANE buffer types
2297  * to their 'regular' counterparts before calling the driver. And we
2298  * restore it afterwards. This way applications can use either buffer
2299  * type and drivers don't need to check for both.
2300  */
2301 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2302                            struct file *file, void *fh, void *arg)
2303 {
2304         struct v4l2_selection *p = arg;
2305         u32 old_type = p->type;
2306         int ret;
2307
2308         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2309                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2310         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2311                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2312         ret = ops->vidioc_g_selection(file, fh, p);
2313         p->type = old_type;
2314         return ret;
2315 }
2316
2317 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2318                            struct file *file, void *fh, void *arg)
2319 {
2320         struct v4l2_selection *p = arg;
2321         u32 old_type = p->type;
2322         int ret;
2323
2324         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2325                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2326         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2327                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2328         ret = ops->vidioc_s_selection(file, fh, p);
2329         p->type = old_type;
2330         return ret;
2331 }
2332
2333 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2334                                 struct file *file, void *fh, void *arg)
2335 {
2336         struct video_device *vfd = video_devdata(file);
2337         struct v4l2_crop *p = arg;
2338         struct v4l2_selection s = {
2339                 .type = p->type,
2340         };
2341         int ret;
2342
2343         /* simulate capture crop using selection api */
2344
2345         /* crop means compose for output devices */
2346         if (V4L2_TYPE_IS_OUTPUT(p->type))
2347                 s.target = V4L2_SEL_TGT_COMPOSE;
2348         else
2349                 s.target = V4L2_SEL_TGT_CROP;
2350
2351         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2352                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2353                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2354
2355         ret = v4l_g_selection(ops, file, fh, &s);
2356
2357         /* copying results to old structure on success */
2358         if (!ret)
2359                 p->c = s.r;
2360         return ret;
2361 }
2362
2363 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2364                                 struct file *file, void *fh, void *arg)
2365 {
2366         struct video_device *vfd = video_devdata(file);
2367         struct v4l2_crop *p = arg;
2368         struct v4l2_selection s = {
2369                 .type = p->type,
2370                 .r = p->c,
2371         };
2372
2373         /* simulate capture crop using selection api */
2374
2375         /* crop means compose for output devices */
2376         if (V4L2_TYPE_IS_OUTPUT(p->type))
2377                 s.target = V4L2_SEL_TGT_COMPOSE;
2378         else
2379                 s.target = V4L2_SEL_TGT_CROP;
2380
2381         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2382                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2383                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2384
2385         return v4l_s_selection(ops, file, fh, &s);
2386 }
2387
2388 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2389                                 struct file *file, void *fh, void *arg)
2390 {
2391         struct video_device *vfd = video_devdata(file);
2392         struct v4l2_cropcap *p = arg;
2393         struct v4l2_selection s = { .type = p->type };
2394         int ret = 0;
2395
2396         /* setting trivial pixelaspect */
2397         p->pixelaspect.numerator = 1;
2398         p->pixelaspect.denominator = 1;
2399
2400         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2401                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2402         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2403                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2404
2405         /*
2406          * The determine_valid_ioctls() call already should ensure
2407          * that this can never happen, but just in case...
2408          */
2409         if (WARN_ON(!ops->vidioc_g_selection))
2410                 return -ENOTTY;
2411
2412         if (ops->vidioc_g_pixelaspect)
2413                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2414                                                 &p->pixelaspect);
2415
2416         /*
2417          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2418          * square pixel aspect ratio in that case.
2419          */
2420         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2421                 return ret;
2422
2423         /* Use g_selection() to fill in the bounds and defrect rectangles */
2424
2425         /* obtaining bounds */
2426         if (V4L2_TYPE_IS_OUTPUT(p->type))
2427                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2428         else
2429                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2430
2431         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2432                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2433                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2434
2435         ret = v4l_g_selection(ops, file, fh, &s);
2436         if (ret)
2437                 return ret;
2438         p->bounds = s.r;
2439
2440         /* obtaining defrect */
2441         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2442                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2443         else
2444                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2445
2446         ret = v4l_g_selection(ops, file, fh, &s);
2447         if (ret)
2448                 return ret;
2449         p->defrect = s.r;
2450
2451         return 0;
2452 }
2453
2454 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2455                                 struct file *file, void *fh, void *arg)
2456 {
2457         struct video_device *vfd = video_devdata(file);
2458         int ret;
2459
2460         if (vfd->v4l2_dev)
2461                 pr_info("%s: =================  START STATUS  =================\n",
2462                         vfd->v4l2_dev->name);
2463         ret = ops->vidioc_log_status(file, fh);
2464         if (vfd->v4l2_dev)
2465                 pr_info("%s: ==================  END STATUS  ==================\n",
2466                         vfd->v4l2_dev->name);
2467         return ret;
2468 }
2469
2470 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2471                                 struct file *file, void *fh, void *arg)
2472 {
2473 #ifdef CONFIG_VIDEO_ADV_DEBUG
2474         struct v4l2_dbg_register *p = arg;
2475         struct video_device *vfd = video_devdata(file);
2476         struct v4l2_subdev *sd;
2477         int idx = 0;
2478
2479         if (!capable(CAP_SYS_ADMIN))
2480                 return -EPERM;
2481         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2482                 if (vfd->v4l2_dev == NULL)
2483                         return -EINVAL;
2484                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2485                         if (p->match.addr == idx++)
2486                                 return v4l2_subdev_call(sd, core, g_register, p);
2487                 return -EINVAL;
2488         }
2489         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2490             (ops->vidioc_g_chip_info || p->match.addr == 0))
2491                 return ops->vidioc_g_register(file, fh, p);
2492         return -EINVAL;
2493 #else
2494         return -ENOTTY;
2495 #endif
2496 }
2497
2498 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2499                                 struct file *file, void *fh, void *arg)
2500 {
2501 #ifdef CONFIG_VIDEO_ADV_DEBUG
2502         const struct v4l2_dbg_register *p = arg;
2503         struct video_device *vfd = video_devdata(file);
2504         struct v4l2_subdev *sd;
2505         int idx = 0;
2506
2507         if (!capable(CAP_SYS_ADMIN))
2508                 return -EPERM;
2509         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2510                 if (vfd->v4l2_dev == NULL)
2511                         return -EINVAL;
2512                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2513                         if (p->match.addr == idx++)
2514                                 return v4l2_subdev_call(sd, core, s_register, p);
2515                 return -EINVAL;
2516         }
2517         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2518             (ops->vidioc_g_chip_info || p->match.addr == 0))
2519                 return ops->vidioc_s_register(file, fh, p);
2520         return -EINVAL;
2521 #else
2522         return -ENOTTY;
2523 #endif
2524 }
2525
2526 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2527                                 struct file *file, void *fh, void *arg)
2528 {
2529 #ifdef CONFIG_VIDEO_ADV_DEBUG
2530         struct video_device *vfd = video_devdata(file);
2531         struct v4l2_dbg_chip_info *p = arg;
2532         struct v4l2_subdev *sd;
2533         int idx = 0;
2534
2535         switch (p->match.type) {
2536         case V4L2_CHIP_MATCH_BRIDGE:
2537                 if (ops->vidioc_s_register)
2538                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2539                 if (ops->vidioc_g_register)
2540                         p->flags |= V4L2_CHIP_FL_READABLE;
2541                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2542                 if (ops->vidioc_g_chip_info)
2543                         return ops->vidioc_g_chip_info(file, fh, arg);
2544                 if (p->match.addr)
2545                         return -EINVAL;
2546                 return 0;
2547
2548         case V4L2_CHIP_MATCH_SUBDEV:
2549                 if (vfd->v4l2_dev == NULL)
2550                         break;
2551                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2552                         if (p->match.addr != idx++)
2553                                 continue;
2554                         if (sd->ops->core && sd->ops->core->s_register)
2555                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2556                         if (sd->ops->core && sd->ops->core->g_register)
2557                                 p->flags |= V4L2_CHIP_FL_READABLE;
2558                         strscpy(p->name, sd->name, sizeof(p->name));
2559                         return 0;
2560                 }
2561                 break;
2562         }
2563         return -EINVAL;
2564 #else
2565         return -ENOTTY;
2566 #endif
2567 }
2568
2569 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2570                                 struct file *file, void *fh, void *arg)
2571 {
2572         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2573 }
2574
2575 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2576                                 struct file *file, void *fh, void *arg)
2577 {
2578         return ops->vidioc_subscribe_event(fh, arg);
2579 }
2580
2581 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2582                                 struct file *file, void *fh, void *arg)
2583 {
2584         return ops->vidioc_unsubscribe_event(fh, arg);
2585 }
2586
2587 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2588                                 struct file *file, void *fh, void *arg)
2589 {
2590         struct v4l2_sliced_vbi_cap *p = arg;
2591         int ret = check_fmt(file, p->type);
2592
2593         if (ret)
2594                 return ret;
2595
2596         /* Clear up to type, everything after type is zeroed already */
2597         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2598
2599         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2600 }
2601
2602 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2603                                 struct file *file, void *fh, void *arg)
2604 {
2605         struct video_device *vfd = video_devdata(file);
2606         struct v4l2_frequency_band *p = arg;
2607         enum v4l2_tuner_type type;
2608         int err;
2609
2610         if (vfd->vfl_type == VFL_TYPE_SDR) {
2611                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2612                         return -EINVAL;
2613                 type = p->type;
2614         } else {
2615                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2616                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2617                 if (type != p->type)
2618                         return -EINVAL;
2619         }
2620         if (ops->vidioc_enum_freq_bands) {
2621                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2622                 if (err != -ENOTTY)
2623                         return err;
2624         }
2625         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2626                 struct v4l2_tuner t = {
2627                         .index = p->tuner,
2628                         .type = type,
2629                 };
2630
2631                 if (p->index)
2632                         return -EINVAL;
2633                 err = ops->vidioc_g_tuner(file, fh, &t);
2634                 if (err)
2635                         return err;
2636                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2637                 p->rangelow = t.rangelow;
2638                 p->rangehigh = t.rangehigh;
2639                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2640                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2641                 return 0;
2642         }
2643         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2644                 struct v4l2_modulator m = {
2645                         .index = p->tuner,
2646                 };
2647
2648                 if (type != V4L2_TUNER_RADIO)
2649                         return -EINVAL;
2650                 if (p->index)
2651                         return -EINVAL;
2652                 err = ops->vidioc_g_modulator(file, fh, &m);
2653                 if (err)
2654                         return err;
2655                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2656                 p->rangelow = m.rangelow;
2657                 p->rangehigh = m.rangehigh;
2658                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2659                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2660                 return 0;
2661         }
2662         return -ENOTTY;
2663 }
2664
2665 struct v4l2_ioctl_info {
2666         unsigned int ioctl;
2667         u32 flags;
2668         const char * const name;
2669         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2670                     void *fh, void *p);
2671         void (*debug)(const void *arg, bool write_only);
2672 };
2673
2674 /* This control needs a priority check */
2675 #define INFO_FL_PRIO            (1 << 0)
2676 /* This control can be valid if the filehandle passes a control handler. */
2677 #define INFO_FL_CTRL            (1 << 1)
2678 /* Queuing ioctl */
2679 #define INFO_FL_QUEUE           (1 << 2)
2680 /* Always copy back result, even on error */
2681 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2682 /* Zero struct from after the field to the end */
2683 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2684         ((offsetof(struct v4l2_struct, field) +                 \
2685           sizeof_field(struct v4l2_struct, field)) << 16)
2686 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2687
2688 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2689         static int v4l_stub_ ## _vidioc(                        \
2690                         const struct v4l2_ioctl_ops *ops,       \
2691                         struct file *file, void *fh, void *p)   \
2692         {                                                       \
2693                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2694         }
2695
2696 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2697         [_IOC_NR(_ioctl)] = {                                   \
2698                 .ioctl = _ioctl,                                \
2699                 .flags = _flags,                                \
2700                 .name = #_ioctl,                                \
2701                 .func = _func,                                  \
2702                 .debug = _debug,                                \
2703         }
2704
2705 DEFINE_V4L_STUB_FUNC(g_fbuf)
2706 DEFINE_V4L_STUB_FUNC(s_fbuf)
2707 DEFINE_V4L_STUB_FUNC(expbuf)
2708 DEFINE_V4L_STUB_FUNC(g_std)
2709 DEFINE_V4L_STUB_FUNC(g_audio)
2710 DEFINE_V4L_STUB_FUNC(s_audio)
2711 DEFINE_V4L_STUB_FUNC(g_edid)
2712 DEFINE_V4L_STUB_FUNC(s_edid)
2713 DEFINE_V4L_STUB_FUNC(g_audout)
2714 DEFINE_V4L_STUB_FUNC(s_audout)
2715 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2716 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2717 DEFINE_V4L_STUB_FUNC(enumaudio)
2718 DEFINE_V4L_STUB_FUNC(enumaudout)
2719 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2720 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2721 DEFINE_V4L_STUB_FUNC(g_enc_index)
2722 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2723 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2724 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2725 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2726 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2727 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2728 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2729 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2730 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2731
2732 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2733         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2734         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2735         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2736         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2737         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2738         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2739         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2740         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2741         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2742         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2743         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2744         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2745         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2746         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2747         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2748         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2749         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2750         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2751         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2752         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2753         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2754         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2755         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2756         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2757         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2758         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2759         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2760         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2761         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2762         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2763         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2764         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2765         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2766         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2767         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2768         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2769         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2770         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2771         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2772         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2773         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2774         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2775         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2776         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2777         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2778         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2779         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2780         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2781         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2782         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2783         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2784         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2785         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2786         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2787         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)),
2788         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2789         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2790         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2791         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2792         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2793         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2794         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2795         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2796         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2797         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2798         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2799         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2800         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2801         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2802         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)),
2803         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2804         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2805         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2806         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2807         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2808         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2809         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2810         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2811         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2812         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2813         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)),
2814         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)),
2815 };
2816 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2817
2818 static bool v4l2_is_known_ioctl(unsigned int cmd)
2819 {
2820         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2821                 return false;
2822         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2823 }
2824
2825 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2826                                          struct v4l2_fh *vfh, unsigned int cmd,
2827                                          void *arg)
2828 {
2829         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2830                 return vdev->lock;
2831         if (vfh && vfh->m2m_ctx &&
2832             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2833                 if (vfh->m2m_ctx->q_lock)
2834                         return vfh->m2m_ctx->q_lock;
2835         }
2836         if (vdev->queue && vdev->queue->lock &&
2837                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2838                 return vdev->queue->lock;
2839         return vdev->lock;
2840 }
2841
2842 /* Common ioctl debug function. This function can be used by
2843    external ioctl messages as well as internal V4L ioctl */
2844 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2845 {
2846         const char *dir, *type;
2847
2848         if (prefix)
2849                 printk(KERN_DEBUG "%s: ", prefix);
2850
2851         switch (_IOC_TYPE(cmd)) {
2852         case 'd':
2853                 type = "v4l2_int";
2854                 break;
2855         case 'V':
2856                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2857                         type = "v4l2";
2858                         break;
2859                 }
2860                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2861                 return;
2862         default:
2863                 type = "unknown";
2864                 break;
2865         }
2866
2867         switch (_IOC_DIR(cmd)) {
2868         case _IOC_NONE:              dir = "--"; break;
2869         case _IOC_READ:              dir = "r-"; break;
2870         case _IOC_WRITE:             dir = "-w"; break;
2871         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2872         default:                     dir = "*ERR*"; break;
2873         }
2874         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2875                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2876 }
2877 EXPORT_SYMBOL(v4l_printk_ioctl);
2878
2879 static long __video_do_ioctl(struct file *file,
2880                 unsigned int cmd, void *arg)
2881 {
2882         struct video_device *vfd = video_devdata(file);
2883         struct mutex *req_queue_lock = NULL;
2884         struct mutex *lock; /* ioctl serialization mutex */
2885         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2886         bool write_only = false;
2887         struct v4l2_ioctl_info default_info;
2888         const struct v4l2_ioctl_info *info;
2889         void *fh = file->private_data;
2890         struct v4l2_fh *vfh = NULL;
2891         int dev_debug = vfd->dev_debug;
2892         long ret = -ENOTTY;
2893
2894         if (ops == NULL) {
2895                 pr_warn("%s: has no ioctl_ops.\n",
2896                                 video_device_node_name(vfd));
2897                 return ret;
2898         }
2899
2900         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2901                 vfh = file->private_data;
2902
2903         /*
2904          * We need to serialize streamon/off with queueing new requests.
2905          * These ioctls may trigger the cancellation of a streaming
2906          * operation, and that should not be mixed with queueing a new
2907          * request at the same time.
2908          */
2909         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2910             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2911                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2912
2913                 if (mutex_lock_interruptible(req_queue_lock))
2914                         return -ERESTARTSYS;
2915         }
2916
2917         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2918
2919         if (lock && mutex_lock_interruptible(lock)) {
2920                 if (req_queue_lock)
2921                         mutex_unlock(req_queue_lock);
2922                 return -ERESTARTSYS;
2923         }
2924
2925         if (!video_is_registered(vfd)) {
2926                 ret = -ENODEV;
2927                 goto unlock;
2928         }
2929
2930         if (v4l2_is_known_ioctl(cmd)) {
2931                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2932
2933                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2934                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2935                         goto done;
2936
2937                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2938                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2939                         if (ret)
2940                                 goto done;
2941                 }
2942         } else {
2943                 default_info.ioctl = cmd;
2944                 default_info.flags = 0;
2945                 default_info.debug = v4l_print_default;
2946                 info = &default_info;
2947         }
2948
2949         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2950         if (info != &default_info) {
2951                 ret = info->func(ops, file, fh, arg);
2952         } else if (!ops->vidioc_default) {
2953                 ret = -ENOTTY;
2954         } else {
2955                 ret = ops->vidioc_default(file, fh,
2956                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2957                         cmd, arg);
2958         }
2959
2960 done:
2961         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2962                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2963                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2964                         goto unlock;
2965
2966                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2967                 if (ret < 0)
2968                         pr_cont(": error %ld", ret);
2969                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2970                         pr_cont("\n");
2971                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2972                         info->debug(arg, write_only);
2973                 else {
2974                         pr_cont(": ");
2975                         info->debug(arg, write_only);
2976                 }
2977         }
2978
2979 unlock:
2980         if (lock)
2981                 mutex_unlock(lock);
2982         if (req_queue_lock)
2983                 mutex_unlock(req_queue_lock);
2984         return ret;
2985 }
2986
2987 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2988                             void __user **user_ptr, void ***kernel_ptr)
2989 {
2990         int ret = 0;
2991
2992         switch (cmd) {
2993         case VIDIOC_PREPARE_BUF:
2994         case VIDIOC_QUERYBUF:
2995         case VIDIOC_QBUF:
2996         case VIDIOC_DQBUF: {
2997                 struct v4l2_buffer *buf = parg;
2998
2999                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3000                         if (buf->length > VIDEO_MAX_PLANES) {
3001                                 ret = -EINVAL;
3002                                 break;
3003                         }
3004                         *user_ptr = (void __user *)buf->m.planes;
3005                         *kernel_ptr = (void **)&buf->m.planes;
3006                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3007                         ret = 1;
3008                 }
3009                 break;
3010         }
3011
3012         case VIDIOC_G_EDID:
3013         case VIDIOC_S_EDID: {
3014                 struct v4l2_edid *edid = parg;
3015
3016                 if (edid->blocks) {
3017                         if (edid->blocks > 256) {
3018                                 ret = -EINVAL;
3019                                 break;
3020                         }
3021                         *user_ptr = (void __user *)edid->edid;
3022                         *kernel_ptr = (void **)&edid->edid;
3023                         *array_size = edid->blocks * 128;
3024                         ret = 1;
3025                 }
3026                 break;
3027         }
3028
3029         case VIDIOC_S_EXT_CTRLS:
3030         case VIDIOC_G_EXT_CTRLS:
3031         case VIDIOC_TRY_EXT_CTRLS: {
3032                 struct v4l2_ext_controls *ctrls = parg;
3033
3034                 if (ctrls->count != 0) {
3035                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3036                                 ret = -EINVAL;
3037                                 break;
3038                         }
3039                         *user_ptr = (void __user *)ctrls->controls;
3040                         *kernel_ptr = (void **)&ctrls->controls;
3041                         *array_size = sizeof(struct v4l2_ext_control)
3042                                     * ctrls->count;
3043                         ret = 1;
3044                 }
3045                 break;
3046         }
3047         case VIDIOC_G_FMT:
3048         case VIDIOC_S_FMT:
3049         case VIDIOC_TRY_FMT: {
3050                 struct v4l2_format *fmt = parg;
3051
3052                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3053                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3054                         break;
3055                 if (fmt->fmt.win.clipcount > 2048)
3056                         return -EINVAL;
3057                 if (!fmt->fmt.win.clipcount)
3058                         break;
3059
3060                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3061                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3062                 *array_size = sizeof(struct v4l2_clip)
3063                                 * fmt->fmt.win.clipcount;
3064
3065                 ret = 1;
3066                 break;
3067         }
3068         }
3069
3070         return ret;
3071 }
3072
3073 static unsigned int video_translate_cmd(unsigned int cmd)
3074 {
3075         switch (cmd) {
3076 #ifdef CONFIG_COMPAT_32BIT_TIME
3077         case VIDIOC_DQEVENT_TIME32:
3078                 return VIDIOC_DQEVENT;
3079         case VIDIOC_QUERYBUF_TIME32:
3080                 return VIDIOC_QUERYBUF;
3081         case VIDIOC_QBUF_TIME32:
3082                 return VIDIOC_QBUF;
3083         case VIDIOC_DQBUF_TIME32:
3084                 return VIDIOC_DQBUF;
3085         case VIDIOC_PREPARE_BUF_TIME32:
3086                 return VIDIOC_PREPARE_BUF;
3087 #endif
3088         }
3089         if (in_compat_syscall())
3090                 return v4l2_compat_translate_cmd(cmd);
3091
3092         return cmd;
3093 }
3094
3095 static int video_get_user(void __user *arg, void *parg,
3096                           unsigned int real_cmd, unsigned int cmd,
3097                           bool *always_copy)
3098 {
3099         unsigned int n = _IOC_SIZE(real_cmd);
3100         int err = 0;
3101
3102         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3103                 /* read-only ioctl */
3104                 memset(parg, 0, n);
3105                 return 0;
3106         }
3107
3108         /*
3109          * In some cases, only a few fields are used as input,
3110          * i.e. when the app sets "index" and then the driver
3111          * fills in the rest of the structure for the thing
3112          * with that index.  We only need to copy up the first
3113          * non-input field.
3114          */
3115         if (v4l2_is_known_ioctl(real_cmd)) {
3116                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3117
3118                 if (flags & INFO_FL_CLEAR_MASK)
3119                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3120                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3121         }
3122
3123         if (cmd == real_cmd) {
3124                 if (copy_from_user(parg, (void __user *)arg, n))
3125                         err = -EFAULT;
3126         } else if (in_compat_syscall()) {
3127                 err = v4l2_compat_get_user(arg, parg, cmd);
3128         } else {
3129                 switch (cmd) {
3130 #ifdef CONFIG_COMPAT_32BIT_TIME
3131                 case VIDIOC_QUERYBUF_TIME32:
3132                 case VIDIOC_QBUF_TIME32:
3133                 case VIDIOC_DQBUF_TIME32:
3134                 case VIDIOC_PREPARE_BUF_TIME32: {
3135                         struct v4l2_buffer_time32 vb32;
3136                         struct v4l2_buffer *vb = parg;
3137
3138                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3139                                 return -EFAULT;
3140
3141                         *vb = (struct v4l2_buffer) {
3142                                 .index          = vb32.index,
3143                                         .type           = vb32.type,
3144                                         .bytesused      = vb32.bytesused,
3145                                         .flags          = vb32.flags,
3146                                         .field          = vb32.field,
3147                                         .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3148                                         .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3149                                         .timecode       = vb32.timecode,
3150                                         .sequence       = vb32.sequence,
3151                                         .memory         = vb32.memory,
3152                                         .m.userptr      = vb32.m.userptr,
3153                                         .length         = vb32.length,
3154                                         .request_fd     = vb32.request_fd,
3155                         };
3156                         break;
3157                 }
3158 #endif
3159                 }
3160         }
3161
3162         /* zero out anything we don't copy from userspace */
3163         if (!err && n < _IOC_SIZE(real_cmd))
3164                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3165         return err;
3166 }
3167
3168 static int video_put_user(void __user *arg, void *parg,
3169                           unsigned int real_cmd, unsigned int cmd)
3170 {
3171         if (!(_IOC_DIR(cmd) & _IOC_READ))
3172                 return 0;
3173
3174         if (cmd == real_cmd) {
3175                 /*  Copy results into user buffer  */
3176                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3177                         return -EFAULT;
3178                 return 0;
3179         }
3180
3181         if (in_compat_syscall())
3182                 return v4l2_compat_put_user(arg, parg, cmd);
3183
3184         switch (cmd) {
3185 #ifdef CONFIG_COMPAT_32BIT_TIME
3186         case VIDIOC_DQEVENT_TIME32: {
3187                 struct v4l2_event *ev = parg;
3188                 struct v4l2_event_time32 ev32;
3189
3190                 memset(&ev32, 0, sizeof(ev32));
3191
3192                 ev32.type       = ev->type;
3193                 ev32.pending    = ev->pending;
3194                 ev32.sequence   = ev->sequence;
3195                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3196                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3197                 ev32.id         = ev->id;
3198
3199                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3200                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3201
3202                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3203                         return -EFAULT;
3204                 break;
3205         }
3206         case VIDIOC_QUERYBUF_TIME32:
3207         case VIDIOC_QBUF_TIME32:
3208         case VIDIOC_DQBUF_TIME32:
3209         case VIDIOC_PREPARE_BUF_TIME32: {
3210                 struct v4l2_buffer *vb = parg;
3211                 struct v4l2_buffer_time32 vb32;
3212
3213                 memset(&vb32, 0, sizeof(vb32));
3214
3215                 vb32.index      = vb->index;
3216                 vb32.type       = vb->type;
3217                 vb32.bytesused  = vb->bytesused;
3218                 vb32.flags      = vb->flags;
3219                 vb32.field      = vb->field;
3220                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3221                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3222                 vb32.timecode   = vb->timecode;
3223                 vb32.sequence   = vb->sequence;
3224                 vb32.memory     = vb->memory;
3225                 vb32.m.userptr  = vb->m.userptr;
3226                 vb32.length     = vb->length;
3227                 vb32.request_fd = vb->request_fd;
3228
3229                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3230                         return -EFAULT;
3231                 break;
3232         }
3233 #endif
3234         }
3235
3236         return 0;
3237 }
3238
3239 long
3240 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3241                v4l2_kioctl func)
3242 {
3243         char    sbuf[128];
3244         void    *mbuf = NULL, *array_buf = NULL;
3245         void    *parg = (void *)arg;
3246         long    err  = -EINVAL;
3247         bool    has_array_args;
3248         bool    always_copy = false;
3249         size_t  array_size = 0;
3250         void __user *user_ptr = NULL;
3251         void    **kernel_ptr = NULL;
3252         unsigned int cmd = video_translate_cmd(orig_cmd);
3253         const size_t ioc_size = _IOC_SIZE(cmd);
3254
3255         /*  Copy arguments into temp kernel buffer  */
3256         if (_IOC_DIR(cmd) != _IOC_NONE) {
3257                 if (ioc_size <= sizeof(sbuf)) {
3258                         parg = sbuf;
3259                 } else {
3260                         /* too big to allocate from stack */
3261                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3262                         if (NULL == mbuf)
3263                                 return -ENOMEM;
3264                         parg = mbuf;
3265                 }
3266
3267                 err = video_get_user((void __user *)arg, parg, cmd,
3268                                      orig_cmd, &always_copy);
3269                 if (err)
3270                         goto out;
3271         }
3272
3273         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3274         if (err < 0)
3275                 goto out;
3276         has_array_args = err;
3277
3278         if (has_array_args) {
3279                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3280                 err = -ENOMEM;
3281                 if (array_buf == NULL)
3282                         goto out_array_args;
3283                 err = -EFAULT;
3284                 if (in_compat_syscall())
3285                         err = v4l2_compat_get_array_args(file, array_buf,
3286                                                          user_ptr, array_size,
3287                                                          orig_cmd, parg);
3288                 else
3289                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3290                                                                 -EFAULT : 0;
3291                 if (err)
3292                         goto out_array_args;
3293                 *kernel_ptr = array_buf;
3294         }
3295
3296         /* Handles IOCTL */
3297         err = func(file, cmd, parg);
3298         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3299                 err = -ENOTTY;
3300                 goto out;
3301         }
3302
3303         if (err == 0) {
3304                 if (cmd == VIDIOC_DQBUF)
3305                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3306                 else if (cmd == VIDIOC_QBUF)
3307                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3308         }
3309
3310         if (has_array_args) {
3311                 *kernel_ptr = (void __force *)user_ptr;
3312                 if (in_compat_syscall()) {
3313                         int put_err;
3314
3315                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3316                                                              array_buf,
3317                                                              array_size,
3318                                                              orig_cmd, parg);
3319                         if (put_err)
3320                                 err = put_err;
3321                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3322                         err = -EFAULT;
3323                 }
3324                 goto out_array_args;
3325         }
3326         /*
3327          * Some ioctls can return an error, but still have valid
3328          * results that must be returned.
3329          */
3330         if (err < 0 && !always_copy)
3331                 goto out;
3332
3333 out_array_args:
3334         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3335                 err = -EFAULT;
3336 out:
3337         kvfree(array_buf);
3338         kfree(mbuf);
3339         return err;
3340 }
3341
3342 long video_ioctl2(struct file *file,
3343                unsigned int cmd, unsigned long arg)
3344 {
3345         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3346 }
3347 EXPORT_SYMBOL(video_ioctl2);