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 bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 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         switch (c->which) {
 882         case V4L2_CID_PRIVATE_BASE:
 883                 /*
 884                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 885                  * when using extended controls.
 886                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 887                  * is it allowed for backwards compatibility.
 888                  */
 889                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 890                         return false;
 891                 break;
 892         case V4L2_CTRL_WHICH_DEF_VAL:
 893                 /* Default value cannot be changed */
 894                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 895                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 896                         c->error_idx = c->count;
 897                         return false;
 898                 }
 899                 return true;
 900         case V4L2_CTRL_WHICH_CUR_VAL:
 901                 return true;
 902         case V4L2_CTRL_WHICH_REQUEST_VAL:
 903                 c->error_idx = c->count;
 904                 return false;
 905         }
 906
 907         /* Check that all controls are from the same control class. */
 908         for (i = 0; i < c->count; i++) {
 909                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 910                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 911                                                                       c->count;
 912                         return false;
 913                 }
 914         }
 915         return true;
 916 }
 917
 918 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 919 {
 920         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 921                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 922                              V4L2_CAP_VIDEO_OUTPUT |
 923                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 924                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 925         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 926                               V4L2_CAP_META_OUTPUT;
 927         struct video_device *vfd = video_devdata(file);
 928         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 929         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 930                       (vfd->device_caps & vid_caps);
 931         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 932         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 933         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 934         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 935                        (vfd->device_caps & meta_caps);
 936         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 937         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 938
 939         if (ops == NULL)
 940                 return -EINVAL;
 941
 942         switch (type) {
 943         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 944                 if ((is_vid || is_tch) && is_rx &&
 945                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 946                         return 0;
 947                 break;
 948         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 949                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 950                         return 0;
 951                 break;
 952         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 953                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 954                         return 0;
 955                 break;
 956         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 957                 if (is_vid && is_tx &&
 958                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 962                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 963                         return 0;
 964                 break;
 965         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 966                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 967                         return 0;
 968                 break;
 969         case V4L2_BUF_TYPE_VBI_CAPTURE:
 970                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 971                         return 0;
 972                 break;
 973         case V4L2_BUF_TYPE_VBI_OUTPUT:
 974                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 975                         return 0;
 976                 break;
 977         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 978                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 979                         return 0;
 980                 break;
 981         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 982                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 983                         return 0;
 984                 break;
 985         case V4L2_BUF_TYPE_SDR_CAPTURE:
 986                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 987                         return 0;
 988                 break;
 989         case V4L2_BUF_TYPE_SDR_OUTPUT:
 990                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 991                         return 0;
 992                 break;
 993         case V4L2_BUF_TYPE_META_CAPTURE:
 994                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 995                         return 0;
 996                 break;
 997         case V4L2_BUF_TYPE_META_OUTPUT:
 998                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 999                         return 0;
1000                 break;
1001         default:
1002                 break;
1003         }
1004         return -EINVAL;
1005 }
1006
1007 static void v4l_sanitize_format(struct v4l2_format *fmt)
1008 {
1009         unsigned int offset;
1010
1011         /* Make sure num_planes is not bogus */
1012         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1013             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1014                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1015                                                VIDEO_MAX_PLANES);
1016
1017         /*
1018          * The v4l2_pix_format structure has been extended with fields that were
1019          * not previously required to be set to zero by applications. The priv
1020          * field, when set to a magic value, indicates the the extended fields
1021          * are valid. Otherwise they will contain undefined values. To simplify
1022          * the API towards drivers zero the extended fields and set the priv
1023          * field to the magic value when the extended pixel format structure
1024          * isn't used by applications.
1025          */
1026
1027         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1028             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1029                 return;
1030
1031         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1032                 return;
1033
1034         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1035
1036         offset = offsetof(struct v4l2_pix_format, priv)
1037                + sizeof(fmt->fmt.pix.priv);
1038         memset(((void *)&fmt->fmt.pix) + offset, 0,
1039                sizeof(fmt->fmt.pix) - offset);
1040 }
1041
1042 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1043                                 struct file *file, void *fh, void *arg)
1044 {
1045         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1046         struct video_device *vfd = video_devdata(file);
1047         int ret;
1048
1049         cap->version = LINUX_VERSION_CODE;
1050         cap->device_caps = vfd->device_caps;
1051         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1052
1053         ret = ops->vidioc_querycap(file, fh, cap);
1054
1055         /*
1056          * Drivers must not change device_caps, so check for this and
1057          * warn if this happened.
1058          */
1059         WARN_ON(cap->device_caps != vfd->device_caps);
1060         /*
1061          * Check that capabilities is a superset of
1062          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1063          */
1064         WARN_ON((cap->capabilities &
1065                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1066                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1067         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1068         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1069
1070         return ret;
1071 }
1072
1073 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1074                        struct file *file, void *fh, void *arg)
1075 {
1076         struct video_device *vfd = video_devdata(file);
1077
1078         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1079                 *(int *)arg = 0;
1080                 return 0;
1081         }
1082
1083         return ops->vidioc_g_input(file, fh, arg);
1084 }
1085
1086 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1087                         struct file *file, void *fh, void *arg)
1088 {
1089         struct video_device *vfd = video_devdata(file);
1090
1091         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1092                 *(int *)arg = 0;
1093                 return 0;
1094         }
1095
1096         return ops->vidioc_g_output(file, fh, arg);
1097 }
1098
1099 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1100                                 struct file *file, void *fh, void *arg)
1101 {
1102         struct video_device *vfd = video_devdata(file);
1103         int ret;
1104
1105         ret = v4l_enable_media_source(vfd);
1106         if (ret)
1107                 return ret;
1108
1109         if (vfd->device_caps & V4L2_CAP_IO_MC)
1110                 return  *(int *)arg ? -EINVAL : 0;
1111
1112         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1113 }
1114
1115 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1116                                 struct file *file, void *fh, void *arg)
1117 {
1118         struct video_device *vfd = video_devdata(file);
1119
1120         if (vfd->device_caps & V4L2_CAP_IO_MC)
1121                 return  *(int *)arg ? -EINVAL : 0;
1122
1123         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1124 }
1125
1126 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1127                                 struct file *file, void *fh, void *arg)
1128 {
1129         struct video_device *vfd;
1130         u32 *p = arg;
1131
1132         vfd = video_devdata(file);
1133         *p = v4l2_prio_max(vfd->prio);
1134         return 0;
1135 }
1136
1137 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1138                                 struct file *file, void *fh, void *arg)
1139 {
1140         struct video_device *vfd;
1141         struct v4l2_fh *vfh;
1142         u32 *p = arg;
1143
1144         vfd = video_devdata(file);
1145         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1146                 return -ENOTTY;
1147         vfh = file->private_data;
1148         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1149 }
1150
1151 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1152                                 struct file *file, void *fh, void *arg)
1153 {
1154         struct video_device *vfd = video_devdata(file);
1155         struct v4l2_input *p = arg;
1156
1157         /*
1158          * We set the flags for CAP_DV_TIMINGS &
1159          * CAP_STD here based on ioctl handler provided by the
1160          * driver. If the driver doesn't support these
1161          * for a specific input, it must override these flags.
1162          */
1163         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1164                 p->capabilities |= V4L2_IN_CAP_STD;
1165
1166         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1167                 if (p->index)
1168                         return -EINVAL;
1169                 strscpy(p->name, vfd->name, sizeof(p->name));
1170                 p->type = V4L2_INPUT_TYPE_CAMERA;
1171                 return 0;
1172         }
1173
1174         return ops->vidioc_enum_input(file, fh, p);
1175 }
1176
1177 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1178                                 struct file *file, void *fh, void *arg)
1179 {
1180         struct video_device *vfd = video_devdata(file);
1181         struct v4l2_output *p = arg;
1182
1183         /*
1184          * We set the flags for CAP_DV_TIMINGS &
1185          * CAP_STD here based on ioctl handler provided by the
1186          * driver. If the driver doesn't support these
1187          * for a specific output, it must override these flags.
1188          */
1189         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1190                 p->capabilities |= V4L2_OUT_CAP_STD;
1191
1192         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1193                 if (p->index)
1194                         return -EINVAL;
1195                 strscpy(p->name, vfd->name, sizeof(p->name));
1196                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1197                 return 0;
1198         }
1199
1200         return ops->vidioc_enum_output(file, fh, p);
1201 }
1202
1203 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1204 {
1205         const unsigned sz = sizeof(fmt->description);
1206         const char *descr = NULL;
1207         u32 flags = 0;
1208
1209         /*
1210          * We depart from the normal coding style here since the descriptions
1211          * should be aligned so it is easy to see which descriptions will be
1212          * longer than 31 characters (the max length for a description).
1213          * And frankly, this is easier to read anyway.
1214          *
1215          * Note that gcc will use O(log N) comparisons to find the right case.
1216          */
1217         switch (fmt->pixelformat) {
1218         /* Max description length mask: descr = "0123456789012345678901234567890" */
1219         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1220         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1221         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1222         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1223         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1224         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1225         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1226         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1227         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1228         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1229         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1230         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1231         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1232         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1233         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1234         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1235         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1236         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1237         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1238         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1239         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1240         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1241         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1242         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1243         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1244         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1245         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1246         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1247         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1248         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1249         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1250         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1251         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1252         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1253         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1254         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1255         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1256         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1257         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1258         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1259         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1260         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1261         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1262         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1263         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1264         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1265         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1266         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1267         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1268         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1269         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1270         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1271         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1272         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1273         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1274         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1275         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1276         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1277         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1278         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1279         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1280         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1281         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1282         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1283         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1284         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1285         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1286         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1287         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1288         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1289         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1290         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1291         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1292         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1293         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1294         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1295         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1296         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1297         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1298         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1299         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1300         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1301         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1302         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1303         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1304         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1305         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1306         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1307         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1308         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1309         case V4L2_PIX_FMT_NV12_COL128:  descr = "Y/CbCr 4:2:0 (128b cols)"; break;
1310         case V4L2_PIX_FMT_NV12_10_COL128: descr = "10-bit Y/CbCr 4:2:0 (128b cols)"; break;
1311         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1312         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1313         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1314         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1315         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1316         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1317         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1318         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1319         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1320         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1321         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1322         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1323         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1324         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1325         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1326         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1327         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1328         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1329         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1330         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1331         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1332         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1333         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1334         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1335         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1336         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1337         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1338         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1339         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1340         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1341         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1342         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1343         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1344         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1345         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1346         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1347         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1348         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1349         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1350         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1351         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1352         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1353         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1354         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1355         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1356         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1357         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1358         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1359         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1360         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1361         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1362         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1363         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1364         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1365         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1366         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1367         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1368         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1369         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1370         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1371         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1372         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1373         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1374         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1375         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1376         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1377         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1378         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1379         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1380         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1381         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1382         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1383         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1384         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1385         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1386         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1387         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1388         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1389         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1390         case V4L2_META_FMT_SENSOR_DATA: descr = "Sensor Ancillary Metadata"; break;
1391         case V4L2_META_FMT_BCM2835_ISP_STATS: descr = "BCM2835 ISP Image Statistics"; break;
1392
1393         default:
1394                 /* Compressed formats */
1395                 flags = V4L2_FMT_FLAG_COMPRESSED;
1396                 switch (fmt->pixelformat) {
1397                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1398                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1399                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1400                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1401                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1402                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1403                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1404                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1405                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1406                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1407                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1408                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1409                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1410                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1411                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1412                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1413                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1414                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1415                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1416                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1417                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1418                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1419                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1420                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1421                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1422                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1423                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1424                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1425                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1426                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1427                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1428                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1429                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1430                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1431                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1432                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1433                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1434                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1435                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1436                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1437                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1438                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1439                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1440                 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1441                 default:
1442                         if (fmt->description[0])
1443                                 return;
1444                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1445                         flags = 0;
1446                         snprintf(fmt->description, sz, "%p4cc",
1447                                  &fmt->pixelformat);
1448                         break;
1449                 }
1450         }
1451
1452         if (descr)
1453                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1454         fmt->flags |= flags;
1455 }
1456
1457 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1458                                 struct file *file, void *fh, void *arg)
1459 {
1460         struct video_device *vdev = video_devdata(file);
1461         struct v4l2_fmtdesc *p = arg;
1462         int ret = check_fmt(file, p->type);
1463         u32 mbus_code;
1464         u32 cap_mask;
1465
1466         if (ret)
1467                 return ret;
1468         ret = -EINVAL;
1469
1470         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1471                 p->mbus_code = 0;
1472
1473         mbus_code = p->mbus_code;
1474         CLEAR_AFTER_FIELD(p, type);
1475         p->mbus_code = mbus_code;
1476
1477         switch (p->type) {
1478         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1479         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1480                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1481                            V4L2_CAP_VIDEO_M2M_MPLANE;
1482                 if (!!(vdev->device_caps & cap_mask) !=
1483                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1484                         break;
1485
1486                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1487                         break;
1488                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1489                 break;
1490         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1491                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1492                         break;
1493                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1494                 break;
1495         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1496         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1497                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1498                            V4L2_CAP_VIDEO_M2M_MPLANE;
1499                 if (!!(vdev->device_caps & cap_mask) !=
1500                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1501                         break;
1502
1503                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1504                         break;
1505                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1506                 break;
1507         case V4L2_BUF_TYPE_SDR_CAPTURE:
1508                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1509                         break;
1510                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1511                 break;
1512         case V4L2_BUF_TYPE_SDR_OUTPUT:
1513                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1514                         break;
1515                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1516                 break;
1517         case V4L2_BUF_TYPE_META_CAPTURE:
1518                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1519                         break;
1520                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1521                 break;
1522         case V4L2_BUF_TYPE_META_OUTPUT:
1523                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1524                         break;
1525                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1526                 break;
1527         }
1528         if (ret == 0)
1529                 v4l_fill_fmtdesc(p);
1530         return ret;
1531 }
1532
1533 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1534 {
1535         /*
1536          * The v4l2_pix_format structure contains fields that make no sense for
1537          * touch. Set them to default values in this case.
1538          */
1539
1540         p->field = V4L2_FIELD_NONE;
1541         p->colorspace = V4L2_COLORSPACE_RAW;
1542         p->flags = 0;
1543         p->ycbcr_enc = 0;
1544         p->quantization = 0;
1545         p->xfer_func = 0;
1546 }
1547
1548 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1549                                 struct file *file, void *fh, void *arg)
1550 {
1551         struct v4l2_format *p = arg;
1552         struct video_device *vfd = video_devdata(file);
1553         int ret = check_fmt(file, p->type);
1554
1555         if (ret)
1556                 return ret;
1557
1558         /*
1559          * fmt can't be cleared for these overlay types due to the 'clips'
1560          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1561          * Those are provided by the user. So handle these two overlay types
1562          * first, and then just do a simple memset for the other types.
1563          */
1564         switch (p->type) {
1565         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1566         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1567                 struct v4l2_clip *clips = p->fmt.win.clips;
1568                 u32 clipcount = p->fmt.win.clipcount;
1569                 void __user *bitmap = p->fmt.win.bitmap;
1570
1571                 memset(&p->fmt, 0, sizeof(p->fmt));
1572                 p->fmt.win.clips = clips;
1573                 p->fmt.win.clipcount = clipcount;
1574                 p->fmt.win.bitmap = bitmap;
1575                 break;
1576         }
1577         default:
1578                 memset(&p->fmt, 0, sizeof(p->fmt));
1579                 break;
1580         }
1581
1582         switch (p->type) {
1583         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1584                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1585                         break;
1586                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1587                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1588                 /* just in case the driver zeroed it again */
1589                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1590                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1591                         v4l_pix_format_touch(&p->fmt.pix);
1592                 return ret;
1593         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1594                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1595         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1596                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1597         case V4L2_BUF_TYPE_VBI_CAPTURE:
1598                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1599         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1600                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1601         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1602                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1603                         break;
1604                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1605                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1606                 /* just in case the driver zeroed it again */
1607                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1608                 return ret;
1609         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1610                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1611         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1612                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1613         case V4L2_BUF_TYPE_VBI_OUTPUT:
1614                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1615         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1616                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1617         case V4L2_BUF_TYPE_SDR_CAPTURE:
1618                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1619         case V4L2_BUF_TYPE_SDR_OUTPUT:
1620                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1621         case V4L2_BUF_TYPE_META_CAPTURE:
1622                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1623         case V4L2_BUF_TYPE_META_OUTPUT:
1624                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1625         }
1626         return -EINVAL;
1627 }
1628
1629 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1630                                 struct file *file, void *fh, void *arg)
1631 {
1632         struct v4l2_format *p = arg;
1633         struct video_device *vfd = video_devdata(file);
1634         int ret = check_fmt(file, p->type);
1635         unsigned int i;
1636
1637         if (ret)
1638                 return ret;
1639
1640         ret = v4l_enable_media_source(vfd);
1641         if (ret)
1642                 return ret;
1643         v4l_sanitize_format(p);
1644
1645         switch (p->type) {
1646         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1647                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1648                         break;
1649                 CLEAR_AFTER_FIELD(p, fmt.pix);
1650                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1651                 /* just in case the driver zeroed it again */
1652                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1653                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1654                         v4l_pix_format_touch(&p->fmt.pix);
1655                 return ret;
1656         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1657                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1658                         break;
1659                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1660                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1661                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1662                                           bytesperline);
1663                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1664         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1665                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1666                         break;
1667                 CLEAR_AFTER_FIELD(p, fmt.win);
1668                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1669         case V4L2_BUF_TYPE_VBI_CAPTURE:
1670                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1671                         break;
1672                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1673                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1674         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1675                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1676                         break;
1677                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1678                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1679         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1680                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1681                         break;
1682                 CLEAR_AFTER_FIELD(p, fmt.pix);
1683                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1684                 /* just in case the driver zeroed it again */
1685                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1686                 return ret;
1687         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1688                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1689                         break;
1690                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1691                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1692                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1693                                           bytesperline);
1694                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1695         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1696                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1697                         break;
1698                 CLEAR_AFTER_FIELD(p, fmt.win);
1699                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1700         case V4L2_BUF_TYPE_VBI_OUTPUT:
1701                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1702                         break;
1703                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1704                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1705         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1706                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1707                         break;
1708                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1709                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1710         case V4L2_BUF_TYPE_SDR_CAPTURE:
1711                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1712                         break;
1713                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1714                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1715         case V4L2_BUF_TYPE_SDR_OUTPUT:
1716                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1717                         break;
1718                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1719                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1720         case V4L2_BUF_TYPE_META_CAPTURE:
1721                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1722                         break;
1723                 CLEAR_AFTER_FIELD(p, fmt.meta);
1724                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1725         case V4L2_BUF_TYPE_META_OUTPUT:
1726                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1727                         break;
1728                 CLEAR_AFTER_FIELD(p, fmt.meta);
1729                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1730         }
1731         return -EINVAL;
1732 }
1733
1734 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1735                                 struct file *file, void *fh, void *arg)
1736 {
1737         struct v4l2_format *p = arg;
1738         struct video_device *vfd = video_devdata(file);
1739         int ret = check_fmt(file, p->type);
1740         unsigned int i;
1741
1742         if (ret)
1743                 return ret;
1744
1745         v4l_sanitize_format(p);
1746
1747         switch (p->type) {
1748         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1749                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1750                         break;
1751                 CLEAR_AFTER_FIELD(p, fmt.pix);
1752                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1753                 /* just in case the driver zeroed it again */
1754                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1755                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1756                         v4l_pix_format_touch(&p->fmt.pix);
1757                 return ret;
1758         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1759                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1760                         break;
1761                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1762                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1763                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1764                                           bytesperline);
1765                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1766         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1767                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1768                         break;
1769                 CLEAR_AFTER_FIELD(p, fmt.win);
1770                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1771         case V4L2_BUF_TYPE_VBI_CAPTURE:
1772                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1773                         break;
1774                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1775                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1776         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1777                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1778                         break;
1779                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1780                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1781         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1782                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1783                         break;
1784                 CLEAR_AFTER_FIELD(p, fmt.pix);
1785                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1786                 /* just in case the driver zeroed it again */
1787                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1788                 return ret;
1789         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1790                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1791                         break;
1792                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1793                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1794                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1795                                           bytesperline);
1796                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1797         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1798                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1799                         break;
1800                 CLEAR_AFTER_FIELD(p, fmt.win);
1801                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1802         case V4L2_BUF_TYPE_VBI_OUTPUT:
1803                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1804                         break;
1805                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1806                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1807         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1808                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1809                         break;
1810                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1811                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1812         case V4L2_BUF_TYPE_SDR_CAPTURE:
1813                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1814                         break;
1815                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1816                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1817         case V4L2_BUF_TYPE_SDR_OUTPUT:
1818                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1819                         break;
1820                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1821                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1822         case V4L2_BUF_TYPE_META_CAPTURE:
1823                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1824                         break;
1825                 CLEAR_AFTER_FIELD(p, fmt.meta);
1826                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1827         case V4L2_BUF_TYPE_META_OUTPUT:
1828                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1829                         break;
1830                 CLEAR_AFTER_FIELD(p, fmt.meta);
1831                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1832         }
1833         return -EINVAL;
1834 }
1835
1836 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1837                                 struct file *file, void *fh, void *arg)
1838 {
1839         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1840 }
1841
1842 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1843                                 struct file *file, void *fh, void *arg)
1844 {
1845         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1846 }
1847
1848 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1849                                 struct file *file, void *fh, void *arg)
1850 {
1851         struct video_device *vfd = video_devdata(file);
1852         struct v4l2_tuner *p = arg;
1853         int err;
1854
1855         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1856                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1857         err = ops->vidioc_g_tuner(file, fh, p);
1858         if (!err)
1859                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1860         return err;
1861 }
1862
1863 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1864                                 struct file *file, void *fh, void *arg)
1865 {
1866         struct video_device *vfd = video_devdata(file);
1867         struct v4l2_tuner *p = arg;
1868         int ret;
1869
1870         ret = v4l_enable_media_source(vfd);
1871         if (ret)
1872                 return ret;
1873         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1874                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1875         return ops->vidioc_s_tuner(file, fh, p);
1876 }
1877
1878 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1879                                 struct file *file, void *fh, void *arg)
1880 {
1881         struct video_device *vfd = video_devdata(file);
1882         struct v4l2_modulator *p = arg;
1883         int err;
1884
1885         if (vfd->vfl_type == VFL_TYPE_RADIO)
1886                 p->type = V4L2_TUNER_RADIO;
1887
1888         err = ops->vidioc_g_modulator(file, fh, p);
1889         if (!err)
1890                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1891         return err;
1892 }
1893
1894 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1895                                 struct file *file, void *fh, void *arg)
1896 {
1897         struct video_device *vfd = video_devdata(file);
1898         struct v4l2_modulator *p = arg;
1899
1900         if (vfd->vfl_type == VFL_TYPE_RADIO)
1901                 p->type = V4L2_TUNER_RADIO;
1902
1903         return ops->vidioc_s_modulator(file, fh, p);
1904 }
1905
1906 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1907                                 struct file *file, void *fh, void *arg)
1908 {
1909         struct video_device *vfd = video_devdata(file);
1910         struct v4l2_frequency *p = arg;
1911
1912         if (vfd->vfl_type == VFL_TYPE_SDR)
1913                 p->type = V4L2_TUNER_SDR;
1914         else
1915                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1916                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1917         return ops->vidioc_g_frequency(file, fh, p);
1918 }
1919
1920 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1921                                 struct file *file, void *fh, void *arg)
1922 {
1923         struct video_device *vfd = video_devdata(file);
1924         const struct v4l2_frequency *p = arg;
1925         enum v4l2_tuner_type type;
1926         int ret;
1927
1928         ret = v4l_enable_media_source(vfd);
1929         if (ret)
1930                 return ret;
1931         if (vfd->vfl_type == VFL_TYPE_SDR) {
1932                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1933                         return -EINVAL;
1934         } else {
1935                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1936                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1937                 if (type != p->type)
1938                         return -EINVAL;
1939         }
1940         return ops->vidioc_s_frequency(file, fh, p);
1941 }
1942
1943 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1944                                 struct file *file, void *fh, void *arg)
1945 {
1946         struct video_device *vfd = video_devdata(file);
1947         struct v4l2_standard *p = arg;
1948
1949         return v4l_video_std_enumstd(p, vfd->tvnorms);
1950 }
1951
1952 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1953                                 struct file *file, void *fh, void *arg)
1954 {
1955         struct video_device *vfd = video_devdata(file);
1956         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1957         int ret;
1958
1959         ret = v4l_enable_media_source(vfd);
1960         if (ret)
1961                 return ret;
1962         norm = id & vfd->tvnorms;
1963         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1964                 return -EINVAL;
1965
1966         /* Calls the specific handler */
1967         return ops->vidioc_s_std(file, fh, norm);
1968 }
1969
1970 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1971                                 struct file *file, void *fh, void *arg)
1972 {
1973         struct video_device *vfd = video_devdata(file);
1974         v4l2_std_id *p = arg;
1975         int ret;
1976
1977         ret = v4l_enable_media_source(vfd);
1978         if (ret)
1979                 return ret;
1980         /*
1981          * If no signal is detected, then the driver should return
1982          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1983          * any standards that do not apply removed.
1984          *
1985          * This means that tuners, audio and video decoders can join
1986          * their efforts to improve the standards detection.
1987          */
1988         *p = vfd->tvnorms;
1989         return ops->vidioc_querystd(file, fh, arg);
1990 }
1991
1992 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1993                                 struct file *file, void *fh, void *arg)
1994 {
1995         struct video_device *vfd = video_devdata(file);
1996         struct v4l2_hw_freq_seek *p = arg;
1997         enum v4l2_tuner_type type;
1998         int ret;
1999
2000         ret = v4l_enable_media_source(vfd);
2001         if (ret)
2002                 return ret;
2003         /* s_hw_freq_seek is not supported for SDR for now */
2004         if (vfd->vfl_type == VFL_TYPE_SDR)
2005                 return -EINVAL;
2006
2007         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2008                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2009         if (p->type != type)
2010                 return -EINVAL;
2011         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2012 }
2013
2014 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2015                                 struct file *file, void *fh, void *arg)
2016 {
2017         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2018 }
2019
2020 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2021                                 struct file *file, void *fh, void *arg)
2022 {
2023         struct v4l2_requestbuffers *p = arg;
2024         int ret = check_fmt(file, p->type);
2025
2026         if (ret)
2027                 return ret;
2028
2029         CLEAR_AFTER_FIELD(p, capabilities);
2030
2031         return ops->vidioc_reqbufs(file, fh, p);
2032 }
2033
2034 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2035                                 struct file *file, void *fh, void *arg)
2036 {
2037         struct v4l2_buffer *p = arg;
2038         int ret = check_fmt(file, p->type);
2039
2040         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2041 }
2042
2043 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2044                                 struct file *file, void *fh, void *arg)
2045 {
2046         struct v4l2_buffer *p = arg;
2047         int ret = check_fmt(file, p->type);
2048
2049         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2050 }
2051
2052 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2053                                 struct file *file, void *fh, void *arg)
2054 {
2055         struct v4l2_buffer *p = arg;
2056         int ret = check_fmt(file, p->type);
2057
2058         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2059 }
2060
2061 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2062                                 struct file *file, void *fh, void *arg)
2063 {
2064         struct v4l2_create_buffers *create = arg;
2065         int ret = check_fmt(file, create->format.type);
2066
2067         if (ret)
2068                 return ret;
2069
2070         CLEAR_AFTER_FIELD(create, capabilities);
2071
2072         v4l_sanitize_format(&create->format);
2073
2074         ret = ops->vidioc_create_bufs(file, fh, create);
2075
2076         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2077             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2078                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2079
2080         return ret;
2081 }
2082
2083 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2084                                 struct file *file, void *fh, void *arg)
2085 {
2086         struct v4l2_buffer *b = arg;
2087         int ret = check_fmt(file, b->type);
2088
2089         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2090 }
2091
2092 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2093                                 struct file *file, void *fh, void *arg)
2094 {
2095         struct video_device *vfd = video_devdata(file);
2096         struct v4l2_streamparm *p = arg;
2097         v4l2_std_id std;
2098         int ret = check_fmt(file, p->type);
2099
2100         if (ret)
2101                 return ret;
2102         if (ops->vidioc_g_parm)
2103                 return ops->vidioc_g_parm(file, fh, p);
2104         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2105             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2106                 return -EINVAL;
2107         if (vfd->device_caps & V4L2_CAP_READWRITE)
2108                 p->parm.capture.readbuffers = 2;
2109         ret = ops->vidioc_g_std(file, fh, &std);
2110         if (ret == 0)
2111                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2112         return ret;
2113 }
2114
2115 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2116                                 struct file *file, void *fh, void *arg)
2117 {
2118         struct v4l2_streamparm *p = arg;
2119         int ret = check_fmt(file, p->type);
2120
2121         if (ret)
2122                 return ret;
2123
2124         /* Note: extendedmode is never used in drivers */
2125         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2126                 memset(p->parm.output.reserved, 0,
2127                        sizeof(p->parm.output.reserved));
2128                 p->parm.output.extendedmode = 0;
2129                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2130         } else {
2131                 memset(p->parm.capture.reserved, 0,
2132                        sizeof(p->parm.capture.reserved));
2133                 p->parm.capture.extendedmode = 0;
2134                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2135         }
2136         return ops->vidioc_s_parm(file, fh, p);
2137 }
2138
2139 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2140                                 struct file *file, void *fh, void *arg)
2141 {
2142         struct video_device *vfd = video_devdata(file);
2143         struct v4l2_queryctrl *p = arg;
2144         struct v4l2_fh *vfh =
2145                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2146
2147         if (vfh && vfh->ctrl_handler)
2148                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2149         if (vfd->ctrl_handler)
2150                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2151         if (ops->vidioc_queryctrl)
2152                 return ops->vidioc_queryctrl(file, fh, p);
2153         return -ENOTTY;
2154 }
2155
2156 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2157                                 struct file *file, void *fh, void *arg)
2158 {
2159         struct video_device *vfd = video_devdata(file);
2160         struct v4l2_query_ext_ctrl *p = arg;
2161         struct v4l2_fh *vfh =
2162                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2163
2164         if (vfh && vfh->ctrl_handler)
2165                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2166         if (vfd->ctrl_handler)
2167                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2168         if (ops->vidioc_query_ext_ctrl)
2169                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2170         return -ENOTTY;
2171 }
2172
2173 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2174                                 struct file *file, void *fh, void *arg)
2175 {
2176         struct video_device *vfd = video_devdata(file);
2177         struct v4l2_querymenu *p = arg;
2178         struct v4l2_fh *vfh =
2179                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2180
2181         if (vfh && vfh->ctrl_handler)
2182                 return v4l2_querymenu(vfh->ctrl_handler, p);
2183         if (vfd->ctrl_handler)
2184                 return v4l2_querymenu(vfd->ctrl_handler, p);
2185         if (ops->vidioc_querymenu)
2186                 return ops->vidioc_querymenu(file, fh, p);
2187         return -ENOTTY;
2188 }
2189
2190 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2191                                 struct file *file, void *fh, void *arg)
2192 {
2193         struct video_device *vfd = video_devdata(file);
2194         struct v4l2_control *p = arg;
2195         struct v4l2_fh *vfh =
2196                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2197         struct v4l2_ext_controls ctrls;
2198         struct v4l2_ext_control ctrl;
2199
2200         if (vfh && vfh->ctrl_handler)
2201                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2202         if (vfd->ctrl_handler)
2203                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2204         if (ops->vidioc_g_ctrl)
2205                 return ops->vidioc_g_ctrl(file, fh, p);
2206         if (ops->vidioc_g_ext_ctrls == NULL)
2207                 return -ENOTTY;
2208
2209         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2210         ctrls.count = 1;
2211         ctrls.controls = &ctrl;
2212         ctrl.id = p->id;
2213         ctrl.value = p->value;
2214         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2215                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2216
2217                 if (ret == 0)
2218                         p->value = ctrl.value;
2219                 return ret;
2220         }
2221         return -EINVAL;
2222 }
2223
2224 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2225                                 struct file *file, void *fh, void *arg)
2226 {
2227         struct video_device *vfd = video_devdata(file);
2228         struct v4l2_control *p = arg;
2229         struct v4l2_fh *vfh =
2230                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2231         struct v4l2_ext_controls ctrls;
2232         struct v4l2_ext_control ctrl;
2233         int ret;
2234
2235         if (vfh && vfh->ctrl_handler)
2236                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2237         if (vfd->ctrl_handler)
2238                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2239         if (ops->vidioc_s_ctrl)
2240                 return ops->vidioc_s_ctrl(file, fh, p);
2241         if (ops->vidioc_s_ext_ctrls == NULL)
2242                 return -ENOTTY;
2243
2244         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2245         ctrls.count = 1;
2246         ctrls.controls = &ctrl;
2247         ctrl.id = p->id;
2248         ctrl.value = p->value;
2249         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2250                 return -EINVAL;
2251         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2252         p->value = ctrl.value;
2253         return ret;
2254 }
2255
2256 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2257                                 struct file *file, void *fh, void *arg)
2258 {
2259         struct video_device *vfd = video_devdata(file);
2260         struct v4l2_ext_controls *p = arg;
2261         struct v4l2_fh *vfh =
2262                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2263
2264         p->error_idx = p->count;
2265         if (vfh && vfh->ctrl_handler)
2266                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2267                                         vfd, vfd->v4l2_dev->mdev, p);
2268         if (vfd->ctrl_handler)
2269                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2270                                         vfd, vfd->v4l2_dev->mdev, p);
2271         if (ops->vidioc_g_ext_ctrls == NULL)
2272                 return -ENOTTY;
2273         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2274                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2275 }
2276
2277 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2278                                 struct file *file, void *fh, void *arg)
2279 {
2280         struct video_device *vfd = video_devdata(file);
2281         struct v4l2_ext_controls *p = arg;
2282         struct v4l2_fh *vfh =
2283                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2284
2285         p->error_idx = p->count;
2286         if (vfh && vfh->ctrl_handler)
2287                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2288                                         vfd, vfd->v4l2_dev->mdev, p);
2289         if (vfd->ctrl_handler)
2290                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2291                                         vfd, vfd->v4l2_dev->mdev, p);
2292         if (ops->vidioc_s_ext_ctrls == NULL)
2293                 return -ENOTTY;
2294         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2295                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2296 }
2297
2298 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2299                                 struct file *file, void *fh, void *arg)
2300 {
2301         struct video_device *vfd = video_devdata(file);
2302         struct v4l2_ext_controls *p = arg;
2303         struct v4l2_fh *vfh =
2304                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2305
2306         p->error_idx = p->count;
2307         if (vfh && vfh->ctrl_handler)
2308                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2309                                           vfd, vfd->v4l2_dev->mdev, p);
2310         if (vfd->ctrl_handler)
2311                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2312                                           vfd, vfd->v4l2_dev->mdev, p);
2313         if (ops->vidioc_try_ext_ctrls == NULL)
2314                 return -ENOTTY;
2315         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2316                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2317 }
2318
2319 /*
2320  * The selection API specified originally that the _MPLANE buffer types
2321  * shouldn't be used. The reasons for this are lost in the mists of time
2322  * (or just really crappy memories). Regardless, this is really annoying
2323  * for userspace. So to keep things simple we map _MPLANE buffer types
2324  * to their 'regular' counterparts before calling the driver. And we
2325  * restore it afterwards. This way applications can use either buffer
2326  * type and drivers don't need to check for both.
2327  */
2328 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2329                            struct file *file, void *fh, void *arg)
2330 {
2331         struct v4l2_selection *p = arg;
2332         u32 old_type = p->type;
2333         int ret;
2334
2335         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2336                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2337         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2338                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2339         ret = ops->vidioc_g_selection(file, fh, p);
2340         p->type = old_type;
2341         return ret;
2342 }
2343
2344 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2345                            struct file *file, void *fh, void *arg)
2346 {
2347         struct v4l2_selection *p = arg;
2348         u32 old_type = p->type;
2349         int ret;
2350
2351         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2352                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2353         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2354                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2355         ret = ops->vidioc_s_selection(file, fh, p);
2356         p->type = old_type;
2357         return ret;
2358 }
2359
2360 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2361                                 struct file *file, void *fh, void *arg)
2362 {
2363         struct video_device *vfd = video_devdata(file);
2364         struct v4l2_crop *p = arg;
2365         struct v4l2_selection s = {
2366                 .type = p->type,
2367         };
2368         int ret;
2369
2370         /* simulate capture crop using selection api */
2371
2372         /* crop means compose for output devices */
2373         if (V4L2_TYPE_IS_OUTPUT(p->type))
2374                 s.target = V4L2_SEL_TGT_COMPOSE;
2375         else
2376                 s.target = V4L2_SEL_TGT_CROP;
2377
2378         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2379                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2380                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2381
2382         ret = v4l_g_selection(ops, file, fh, &s);
2383
2384         /* copying results to old structure on success */
2385         if (!ret)
2386                 p->c = s.r;
2387         return ret;
2388 }
2389
2390 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2391                                 struct file *file, void *fh, void *arg)
2392 {
2393         struct video_device *vfd = video_devdata(file);
2394         struct v4l2_crop *p = arg;
2395         struct v4l2_selection s = {
2396                 .type = p->type,
2397                 .r = p->c,
2398         };
2399
2400         /* simulate capture crop using selection api */
2401
2402         /* crop means compose for output devices */
2403         if (V4L2_TYPE_IS_OUTPUT(p->type))
2404                 s.target = V4L2_SEL_TGT_COMPOSE;
2405         else
2406                 s.target = V4L2_SEL_TGT_CROP;
2407
2408         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2409                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2410                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2411
2412         return v4l_s_selection(ops, file, fh, &s);
2413 }
2414
2415 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2416                                 struct file *file, void *fh, void *arg)
2417 {
2418         struct video_device *vfd = video_devdata(file);
2419         struct v4l2_cropcap *p = arg;
2420         struct v4l2_selection s = { .type = p->type };
2421         int ret = 0;
2422
2423         /* setting trivial pixelaspect */
2424         p->pixelaspect.numerator = 1;
2425         p->pixelaspect.denominator = 1;
2426
2427         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2428                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2429         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2430                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2431
2432         /*
2433          * The determine_valid_ioctls() call already should ensure
2434          * that this can never happen, but just in case...
2435          */
2436         if (WARN_ON(!ops->vidioc_g_selection))
2437                 return -ENOTTY;
2438
2439         if (ops->vidioc_g_pixelaspect)
2440                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2441                                                 &p->pixelaspect);
2442
2443         /*
2444          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2445          * square pixel aspect ratio in that case.
2446          */
2447         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2448                 return ret;
2449
2450         /* Use g_selection() to fill in the bounds and defrect rectangles */
2451
2452         /* obtaining bounds */
2453         if (V4L2_TYPE_IS_OUTPUT(p->type))
2454                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2455         else
2456                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2457
2458         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2459                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2460                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2461
2462         ret = v4l_g_selection(ops, file, fh, &s);
2463         if (ret)
2464                 return ret;
2465         p->bounds = s.r;
2466
2467         /* obtaining defrect */
2468         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2469                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2470         else
2471                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2472
2473         ret = v4l_g_selection(ops, file, fh, &s);
2474         if (ret)
2475                 return ret;
2476         p->defrect = s.r;
2477
2478         return 0;
2479 }
2480
2481 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2482                                 struct file *file, void *fh, void *arg)
2483 {
2484         struct video_device *vfd = video_devdata(file);
2485         int ret;
2486
2487         if (vfd->v4l2_dev)
2488                 pr_info("%s: =================  START STATUS  =================\n",
2489                         vfd->v4l2_dev->name);
2490         ret = ops->vidioc_log_status(file, fh);
2491         if (vfd->v4l2_dev)
2492                 pr_info("%s: ==================  END STATUS  ==================\n",
2493                         vfd->v4l2_dev->name);
2494         return ret;
2495 }
2496
2497 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2498                                 struct file *file, void *fh, void *arg)
2499 {
2500 #ifdef CONFIG_VIDEO_ADV_DEBUG
2501         struct v4l2_dbg_register *p = arg;
2502         struct video_device *vfd = video_devdata(file);
2503         struct v4l2_subdev *sd;
2504         int idx = 0;
2505
2506         if (!capable(CAP_SYS_ADMIN))
2507                 return -EPERM;
2508         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2509                 if (vfd->v4l2_dev == NULL)
2510                         return -EINVAL;
2511                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2512                         if (p->match.addr == idx++)
2513                                 return v4l2_subdev_call(sd, core, g_register, p);
2514                 return -EINVAL;
2515         }
2516         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2517             (ops->vidioc_g_chip_info || p->match.addr == 0))
2518                 return ops->vidioc_g_register(file, fh, p);
2519         return -EINVAL;
2520 #else
2521         return -ENOTTY;
2522 #endif
2523 }
2524
2525 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2526                                 struct file *file, void *fh, void *arg)
2527 {
2528 #ifdef CONFIG_VIDEO_ADV_DEBUG
2529         const struct v4l2_dbg_register *p = arg;
2530         struct video_device *vfd = video_devdata(file);
2531         struct v4l2_subdev *sd;
2532         int idx = 0;
2533
2534         if (!capable(CAP_SYS_ADMIN))
2535                 return -EPERM;
2536         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2537                 if (vfd->v4l2_dev == NULL)
2538                         return -EINVAL;
2539                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2540                         if (p->match.addr == idx++)
2541                                 return v4l2_subdev_call(sd, core, s_register, p);
2542                 return -EINVAL;
2543         }
2544         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2545             (ops->vidioc_g_chip_info || p->match.addr == 0))
2546                 return ops->vidioc_s_register(file, fh, p);
2547         return -EINVAL;
2548 #else
2549         return -ENOTTY;
2550 #endif
2551 }
2552
2553 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2554                                 struct file *file, void *fh, void *arg)
2555 {
2556 #ifdef CONFIG_VIDEO_ADV_DEBUG
2557         struct video_device *vfd = video_devdata(file);
2558         struct v4l2_dbg_chip_info *p = arg;
2559         struct v4l2_subdev *sd;
2560         int idx = 0;
2561
2562         switch (p->match.type) {
2563         case V4L2_CHIP_MATCH_BRIDGE:
2564                 if (ops->vidioc_s_register)
2565                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2566                 if (ops->vidioc_g_register)
2567                         p->flags |= V4L2_CHIP_FL_READABLE;
2568                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2569                 if (ops->vidioc_g_chip_info)
2570                         return ops->vidioc_g_chip_info(file, fh, arg);
2571                 if (p->match.addr)
2572                         return -EINVAL;
2573                 return 0;
2574
2575         case V4L2_CHIP_MATCH_SUBDEV:
2576                 if (vfd->v4l2_dev == NULL)
2577                         break;
2578                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2579                         if (p->match.addr != idx++)
2580                                 continue;
2581                         if (sd->ops->core && sd->ops->core->s_register)
2582                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2583                         if (sd->ops->core && sd->ops->core->g_register)
2584                                 p->flags |= V4L2_CHIP_FL_READABLE;
2585                         strscpy(p->name, sd->name, sizeof(p->name));
2586                         return 0;
2587                 }
2588                 break;
2589         }
2590         return -EINVAL;
2591 #else
2592         return -ENOTTY;
2593 #endif
2594 }
2595
2596 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2597                                 struct file *file, void *fh, void *arg)
2598 {
2599         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2600 }
2601
2602 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2603                                 struct file *file, void *fh, void *arg)
2604 {
2605         return ops->vidioc_subscribe_event(fh, arg);
2606 }
2607
2608 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2609                                 struct file *file, void *fh, void *arg)
2610 {
2611         return ops->vidioc_unsubscribe_event(fh, arg);
2612 }
2613
2614 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2615                                 struct file *file, void *fh, void *arg)
2616 {
2617         struct v4l2_sliced_vbi_cap *p = arg;
2618         int ret = check_fmt(file, p->type);
2619
2620         if (ret)
2621                 return ret;
2622
2623         /* Clear up to type, everything after type is zeroed already */
2624         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2625
2626         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2627 }
2628
2629 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2630                                 struct file *file, void *fh, void *arg)
2631 {
2632         struct video_device *vfd = video_devdata(file);
2633         struct v4l2_frequency_band *p = arg;
2634         enum v4l2_tuner_type type;
2635         int err;
2636
2637         if (vfd->vfl_type == VFL_TYPE_SDR) {
2638                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2639                         return -EINVAL;
2640                 type = p->type;
2641         } else {
2642                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2643                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2644                 if (type != p->type)
2645                         return -EINVAL;
2646         }
2647         if (ops->vidioc_enum_freq_bands) {
2648                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2649                 if (err != -ENOTTY)
2650                         return err;
2651         }
2652         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2653                 struct v4l2_tuner t = {
2654                         .index = p->tuner,
2655                         .type = type,
2656                 };
2657
2658                 if (p->index)
2659                         return -EINVAL;
2660                 err = ops->vidioc_g_tuner(file, fh, &t);
2661                 if (err)
2662                         return err;
2663                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2664                 p->rangelow = t.rangelow;
2665                 p->rangehigh = t.rangehigh;
2666                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2667                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2668                 return 0;
2669         }
2670         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2671                 struct v4l2_modulator m = {
2672                         .index = p->tuner,
2673                 };
2674
2675                 if (type != V4L2_TUNER_RADIO)
2676                         return -EINVAL;
2677                 if (p->index)
2678                         return -EINVAL;
2679                 err = ops->vidioc_g_modulator(file, fh, &m);
2680                 if (err)
2681                         return err;
2682                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2683                 p->rangelow = m.rangelow;
2684                 p->rangehigh = m.rangehigh;
2685                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2686                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2687                 return 0;
2688         }
2689         return -ENOTTY;
2690 }
2691
2692 struct v4l2_ioctl_info {
2693         unsigned int ioctl;
2694         u32 flags;
2695         const char * const name;
2696         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2697                     void *fh, void *p);
2698         void (*debug)(const void *arg, bool write_only);
2699 };
2700
2701 /* This control needs a priority check */
2702 #define INFO_FL_PRIO            (1 << 0)
2703 /* This control can be valid if the filehandle passes a control handler. */
2704 #define INFO_FL_CTRL            (1 << 1)
2705 /* Queuing ioctl */
2706 #define INFO_FL_QUEUE           (1 << 2)
2707 /* Always copy back result, even on error */
2708 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2709 /* Zero struct from after the field to the end */
2710 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2711         ((offsetof(struct v4l2_struct, field) +                 \
2712           sizeof_field(struct v4l2_struct, field)) << 16)
2713 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2714
2715 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2716         static int v4l_stub_ ## _vidioc(                        \
2717                         const struct v4l2_ioctl_ops *ops,       \
2718                         struct file *file, void *fh, void *p)   \
2719         {                                                       \
2720                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2721         }
2722
2723 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2724         [_IOC_NR(_ioctl)] = {                                   \
2725                 .ioctl = _ioctl,                                \
2726                 .flags = _flags,                                \
2727                 .name = #_ioctl,                                \
2728                 .func = _func,                                  \
2729                 .debug = _debug,                                \
2730         }
2731
2732 DEFINE_V4L_STUB_FUNC(g_fbuf)
2733 DEFINE_V4L_STUB_FUNC(s_fbuf)
2734 DEFINE_V4L_STUB_FUNC(expbuf)
2735 DEFINE_V4L_STUB_FUNC(g_std)
2736 DEFINE_V4L_STUB_FUNC(g_audio)
2737 DEFINE_V4L_STUB_FUNC(s_audio)
2738 DEFINE_V4L_STUB_FUNC(g_edid)
2739 DEFINE_V4L_STUB_FUNC(s_edid)
2740 DEFINE_V4L_STUB_FUNC(g_audout)
2741 DEFINE_V4L_STUB_FUNC(s_audout)
2742 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2743 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2744 DEFINE_V4L_STUB_FUNC(enumaudio)
2745 DEFINE_V4L_STUB_FUNC(enumaudout)
2746 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2747 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2748 DEFINE_V4L_STUB_FUNC(g_enc_index)
2749 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2750 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2751 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2752 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2753 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2754 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2755 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2756 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2757 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2758
2759 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2760         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2761         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2762         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2763         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2764         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2765         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2766         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2767         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2768         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2769         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2770         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2771         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2772         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2773         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2774         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2775         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2776         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2777         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2778         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2779         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2780         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2781         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2782         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2783         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2784         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2785         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2786         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2787         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2788         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2789         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2790         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2791         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2792         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2793         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2794         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2795         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2796         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2797         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2798         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2799         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2800         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2801         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2802         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2803         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2804         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2805         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2806         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2807         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2808         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2809         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2810         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2811         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2812         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2813         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2814         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)),
2815         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2816         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2817         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2818         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2819         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2820         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2821         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2822         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2823         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2824         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2825         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2826         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2827         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2828         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2829         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)),
2830         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2831         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2832         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2833         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2834         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2835         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2836         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2837         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2838         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2839         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2840         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)),
2841         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)),
2842 };
2843 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2844
2845 static bool v4l2_is_known_ioctl(unsigned int cmd)
2846 {
2847         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2848                 return false;
2849         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2850 }
2851
2852 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2853                                          struct v4l2_fh *vfh, unsigned int cmd,
2854                                          void *arg)
2855 {
2856         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2857                 return vdev->lock;
2858         if (vfh && vfh->m2m_ctx &&
2859             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2860                 if (vfh->m2m_ctx->q_lock)
2861                         return vfh->m2m_ctx->q_lock;
2862         }
2863         if (vdev->queue && vdev->queue->lock &&
2864                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2865                 return vdev->queue->lock;
2866         return vdev->lock;
2867 }
2868
2869 /* Common ioctl debug function. This function can be used by
2870    external ioctl messages as well as internal V4L ioctl */
2871 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2872 {
2873         const char *dir, *type;
2874
2875         if (prefix)
2876                 printk(KERN_DEBUG "%s: ", prefix);
2877
2878         switch (_IOC_TYPE(cmd)) {
2879         case 'd':
2880                 type = "v4l2_int";
2881                 break;
2882         case 'V':
2883                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2884                         type = "v4l2";
2885                         break;
2886                 }
2887                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2888                 return;
2889         default:
2890                 type = "unknown";
2891                 break;
2892         }
2893
2894         switch (_IOC_DIR(cmd)) {
2895         case _IOC_NONE:              dir = "--"; break;
2896         case _IOC_READ:              dir = "r-"; break;
2897         case _IOC_WRITE:             dir = "-w"; break;
2898         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2899         default:                     dir = "*ERR*"; break;
2900         }
2901         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2902                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2903 }
2904 EXPORT_SYMBOL(v4l_printk_ioctl);
2905
2906 static long __video_do_ioctl(struct file *file,
2907                 unsigned int cmd, void *arg)
2908 {
2909         struct video_device *vfd = video_devdata(file);
2910         struct mutex *req_queue_lock = NULL;
2911         struct mutex *lock; /* ioctl serialization mutex */
2912         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2913         bool write_only = false;
2914         struct v4l2_ioctl_info default_info;
2915         const struct v4l2_ioctl_info *info;
2916         void *fh = file->private_data;
2917         struct v4l2_fh *vfh = NULL;
2918         int dev_debug = vfd->dev_debug;
2919         long ret = -ENOTTY;
2920
2921         if (ops == NULL) {
2922                 pr_warn("%s: has no ioctl_ops.\n",
2923                                 video_device_node_name(vfd));
2924                 return ret;
2925         }
2926
2927         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2928                 vfh = file->private_data;
2929
2930         /*
2931          * We need to serialize streamon/off with queueing new requests.
2932          * These ioctls may trigger the cancellation of a streaming
2933          * operation, and that should not be mixed with queueing a new
2934          * request at the same time.
2935          */
2936         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2937             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2938                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2939
2940                 if (mutex_lock_interruptible(req_queue_lock))
2941                         return -ERESTARTSYS;
2942         }
2943
2944         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2945
2946         if (lock && mutex_lock_interruptible(lock)) {
2947                 if (req_queue_lock)
2948                         mutex_unlock(req_queue_lock);
2949                 return -ERESTARTSYS;
2950         }
2951
2952         if (!video_is_registered(vfd)) {
2953                 ret = -ENODEV;
2954                 goto unlock;
2955         }
2956
2957         if (v4l2_is_known_ioctl(cmd)) {
2958                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2959
2960                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2961                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2962                         goto done;
2963
2964                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2965                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2966                         if (ret)
2967                                 goto done;
2968                 }
2969         } else {
2970                 default_info.ioctl = cmd;
2971                 default_info.flags = 0;
2972                 default_info.debug = v4l_print_default;
2973                 info = &default_info;
2974         }
2975
2976         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2977         if (info != &default_info) {
2978                 ret = info->func(ops, file, fh, arg);
2979         } else if (!ops->vidioc_default) {
2980                 ret = -ENOTTY;
2981         } else {
2982                 ret = ops->vidioc_default(file, fh,
2983                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2984                         cmd, arg);
2985         }
2986
2987 done:
2988         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2989                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2990                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2991                         goto unlock;
2992
2993                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2994                 if (ret < 0)
2995                         pr_cont(": error %ld", ret);
2996                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2997                         pr_cont("\n");
2998                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2999                         info->debug(arg, write_only);
3000                 else {
3001                         pr_cont(": ");
3002                         info->debug(arg, write_only);
3003                 }
3004         }
3005
3006 unlock:
3007         if (lock)
3008                 mutex_unlock(lock);
3009         if (req_queue_lock)
3010                 mutex_unlock(req_queue_lock);
3011         return ret;
3012 }
3013
3014 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3015                             void __user **user_ptr, void ***kernel_ptr)
3016 {
3017         int ret = 0;
3018
3019         switch (cmd) {
3020         case VIDIOC_PREPARE_BUF:
3021         case VIDIOC_QUERYBUF:
3022         case VIDIOC_QBUF:
3023         case VIDIOC_DQBUF: {
3024                 struct v4l2_buffer *buf = parg;
3025
3026                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3027                         if (buf->length > VIDEO_MAX_PLANES) {
3028                                 ret = -EINVAL;
3029                                 break;
3030                         }
3031                         *user_ptr = (void __user *)buf->m.planes;
3032                         *kernel_ptr = (void **)&buf->m.planes;
3033                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3034                         ret = 1;
3035                 }
3036                 break;
3037         }
3038
3039         case VIDIOC_G_EDID:
3040         case VIDIOC_S_EDID: {
3041                 struct v4l2_edid *edid = parg;
3042
3043                 if (edid->blocks) {
3044                         if (edid->blocks > 256) {
3045                                 ret = -EINVAL;
3046                                 break;
3047                         }
3048                         *user_ptr = (void __user *)edid->edid;
3049                         *kernel_ptr = (void **)&edid->edid;
3050                         *array_size = edid->blocks * 128;
3051                         ret = 1;
3052                 }
3053                 break;
3054         }
3055
3056         case VIDIOC_S_EXT_CTRLS:
3057         case VIDIOC_G_EXT_CTRLS:
3058         case VIDIOC_TRY_EXT_CTRLS: {
3059                 struct v4l2_ext_controls *ctrls = parg;
3060
3061                 if (ctrls->count != 0) {
3062                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3063                                 ret = -EINVAL;
3064                                 break;
3065                         }
3066                         *user_ptr = (void __user *)ctrls->controls;
3067                         *kernel_ptr = (void **)&ctrls->controls;
3068                         *array_size = sizeof(struct v4l2_ext_control)
3069                                     * ctrls->count;
3070                         ret = 1;
3071                 }
3072                 break;
3073         }
3074         case VIDIOC_G_FMT:
3075         case VIDIOC_S_FMT:
3076         case VIDIOC_TRY_FMT: {
3077                 struct v4l2_format *fmt = parg;
3078
3079                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3080                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3081                         break;
3082                 if (fmt->fmt.win.clipcount > 2048)
3083                         return -EINVAL;
3084                 if (!fmt->fmt.win.clipcount)
3085                         break;
3086
3087                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3088                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3089                 *array_size = sizeof(struct v4l2_clip)
3090                                 * fmt->fmt.win.clipcount;
3091
3092                 ret = 1;
3093                 break;
3094         }
3095         }
3096
3097         return ret;
3098 }
3099
3100 static unsigned int video_translate_cmd(unsigned int cmd)
3101 {
3102 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3103         switch (cmd) {
3104         case VIDIOC_DQEVENT_TIME32:
3105                 return VIDIOC_DQEVENT;
3106         case VIDIOC_QUERYBUF_TIME32:
3107                 return VIDIOC_QUERYBUF;
3108         case VIDIOC_QBUF_TIME32:
3109                 return VIDIOC_QBUF;
3110         case VIDIOC_DQBUF_TIME32:
3111                 return VIDIOC_DQBUF;
3112         case VIDIOC_PREPARE_BUF_TIME32:
3113                 return VIDIOC_PREPARE_BUF;
3114         }
3115 #endif
3116         if (in_compat_syscall())
3117                 return v4l2_compat_translate_cmd(cmd);
3118
3119         return cmd;
3120 }
3121
3122 static int video_get_user(void __user *arg, void *parg,
3123                           unsigned int real_cmd, unsigned int cmd,
3124                           bool *always_copy)
3125 {
3126         unsigned int n = _IOC_SIZE(real_cmd);
3127         int err = 0;
3128
3129         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3130                 /* read-only ioctl */
3131                 memset(parg, 0, n);
3132                 return 0;
3133         }
3134
3135         /*
3136          * In some cases, only a few fields are used as input,
3137          * i.e. when the app sets "index" and then the driver
3138          * fills in the rest of the structure for the thing
3139          * with that index.  We only need to copy up the first
3140          * non-input field.
3141          */
3142         if (v4l2_is_known_ioctl(real_cmd)) {
3143                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3144
3145                 if (flags & INFO_FL_CLEAR_MASK)
3146                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3147                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3148         }
3149
3150         if (cmd == real_cmd) {
3151                 if (copy_from_user(parg, (void __user *)arg, n))
3152                         err = -EFAULT;
3153         } else if (in_compat_syscall()) {
3154                 memset(parg, 0, n);
3155                 err = v4l2_compat_get_user(arg, parg, cmd);
3156         } else {
3157                 memset(parg, 0, n);
3158 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3159                 switch (cmd) {
3160                 case VIDIOC_QUERYBUF_TIME32:
3161                 case VIDIOC_QBUF_TIME32:
3162                 case VIDIOC_DQBUF_TIME32:
3163                 case VIDIOC_PREPARE_BUF_TIME32: {
3164                         struct v4l2_buffer_time32 vb32;
3165                         struct v4l2_buffer *vb = parg;
3166
3167                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3168                                 return -EFAULT;
3169
3170                         *vb = (struct v4l2_buffer) {
3171                                 .index          = vb32.index,
3172                                 .type           = vb32.type,
3173                                 .bytesused      = vb32.bytesused,
3174                                 .flags          = vb32.flags,
3175                                 .field          = vb32.field,
3176                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3177                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3178                                 .timecode       = vb32.timecode,
3179                                 .sequence       = vb32.sequence,
3180                                 .memory         = vb32.memory,
3181                                 .m.userptr      = vb32.m.userptr,
3182                                 .length         = vb32.length,
3183                                 .request_fd     = vb32.request_fd,
3184                         };
3185                         break;
3186                 }
3187                 }
3188 #endif
3189         }
3190
3191         /* zero out anything we don't copy from userspace */
3192         if (!err && n < _IOC_SIZE(real_cmd))
3193                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3194         return err;
3195 }
3196
3197 static int video_put_user(void __user *arg, void *parg,
3198                           unsigned int real_cmd, unsigned int cmd)
3199 {
3200         if (!(_IOC_DIR(cmd) & _IOC_READ))
3201                 return 0;
3202
3203         if (cmd == real_cmd) {
3204                 /*  Copy results into user buffer  */
3205                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3206                         return -EFAULT;
3207                 return 0;
3208         }
3209
3210         if (in_compat_syscall())
3211                 return v4l2_compat_put_user(arg, parg, cmd);
3212
3213 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3214         switch (cmd) {
3215         case VIDIOC_DQEVENT_TIME32: {
3216                 struct v4l2_event *ev = parg;
3217                 struct v4l2_event_time32 ev32;
3218
3219                 memset(&ev32, 0, sizeof(ev32));
3220
3221                 ev32.type       = ev->type;
3222                 ev32.pending    = ev->pending;
3223                 ev32.sequence   = ev->sequence;
3224                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3225                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3226                 ev32.id         = ev->id;
3227
3228                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3229                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3230
3231                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3232                         return -EFAULT;
3233                 break;
3234         }
3235         case VIDIOC_QUERYBUF_TIME32:
3236         case VIDIOC_QBUF_TIME32:
3237         case VIDIOC_DQBUF_TIME32:
3238         case VIDIOC_PREPARE_BUF_TIME32: {
3239                 struct v4l2_buffer *vb = parg;
3240                 struct v4l2_buffer_time32 vb32;
3241
3242                 memset(&vb32, 0, sizeof(vb32));
3243
3244                 vb32.index      = vb->index;
3245                 vb32.type       = vb->type;
3246                 vb32.bytesused  = vb->bytesused;
3247                 vb32.flags      = vb->flags;
3248                 vb32.field      = vb->field;
3249                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3250                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3251                 vb32.timecode   = vb->timecode;
3252                 vb32.sequence   = vb->sequence;
3253                 vb32.memory     = vb->memory;
3254                 vb32.m.userptr  = vb->m.userptr;
3255                 vb32.length     = vb->length;
3256                 vb32.request_fd = vb->request_fd;
3257
3258                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3259                         return -EFAULT;
3260                 break;
3261         }
3262         }
3263 #endif
3264
3265         return 0;
3266 }
3267
3268 long
3269 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3270                v4l2_kioctl func)
3271 {
3272         char    sbuf[128];
3273         void    *mbuf = NULL, *array_buf = NULL;
3274         void    *parg = (void *)arg;
3275         long    err  = -EINVAL;
3276         bool    has_array_args;
3277         bool    always_copy = false;
3278         size_t  array_size = 0;
3279         void __user *user_ptr = NULL;
3280         void    **kernel_ptr = NULL;
3281         unsigned int cmd = video_translate_cmd(orig_cmd);
3282         const size_t ioc_size = _IOC_SIZE(cmd);
3283
3284         /*  Copy arguments into temp kernel buffer  */
3285         if (_IOC_DIR(cmd) != _IOC_NONE) {
3286                 if (ioc_size <= sizeof(sbuf)) {
3287                         parg = sbuf;
3288                 } else {
3289                         /* too big to allocate from stack */
3290                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3291                         if (NULL == mbuf)
3292                                 return -ENOMEM;
3293                         parg = mbuf;
3294                 }
3295
3296                 err = video_get_user((void __user *)arg, parg, cmd,
3297                                      orig_cmd, &always_copy);
3298                 if (err)
3299                         goto out;
3300         }
3301
3302         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3303         if (err < 0)
3304                 goto out;
3305         has_array_args = err;
3306
3307         if (has_array_args) {
3308                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3309                 err = -ENOMEM;
3310                 if (array_buf == NULL)
3311                         goto out_array_args;
3312                 err = -EFAULT;
3313                 if (in_compat_syscall())
3314                         err = v4l2_compat_get_array_args(file, array_buf,
3315                                                          user_ptr, array_size,
3316                                                          orig_cmd, parg);
3317                 else
3318                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3319                                                                 -EFAULT : 0;
3320                 if (err)
3321                         goto out_array_args;
3322                 *kernel_ptr = array_buf;
3323         }
3324
3325         /* Handles IOCTL */
3326         err = func(file, cmd, parg);
3327         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3328                 err = -ENOTTY;
3329                 goto out;
3330         }
3331
3332         if (err == 0) {
3333                 if (cmd == VIDIOC_DQBUF)
3334                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3335                 else if (cmd == VIDIOC_QBUF)
3336                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3337         }
3338
3339         if (has_array_args) {
3340                 *kernel_ptr = (void __force *)user_ptr;
3341                 if (in_compat_syscall()) {
3342                         int put_err;
3343
3344                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3345                                                              array_buf,
3346                                                              array_size,
3347                                                              orig_cmd, parg);
3348                         if (put_err)
3349                                 err = put_err;
3350                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3351                         err = -EFAULT;
3352                 }
3353                 goto out_array_args;
3354         }
3355         /*
3356          * Some ioctls can return an error, but still have valid
3357          * results that must be returned.
3358          */
3359         if (err < 0 && !always_copy)
3360                 goto out;
3361
3362 out_array_args:
3363         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3364                 err = -EFAULT;
3365 out:
3366         kvfree(array_buf);
3367         kfree(mbuf);
3368         return err;
3369 }
3370
3371 long video_ioctl2(struct file *file,
3372                unsigned int cmd, unsigned long arg)
3373 {
3374         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3375 }
3376 EXPORT_SYMBOL(video_ioctl2);