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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Video capture interface for Linux version 2
   4  *
   5  * A generic framework to process V4L2 ioctl commands.
   6  *
   7  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
   8  *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/videodev2.h>
  20
  21 #include <media/media-device.h> /* for media_set_bus_info() */
  22 #include <media/v4l2-common.h>
  23 #include <media/v4l2-ioctl.h>
  24 #include <media/v4l2-ctrls.h>
  25 #include <media/v4l2-fh.h>
  26 #include <media/v4l2-event.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/videobuf2-v4l2.h>
  29 #include <media/v4l2-mc.h>
  30 #include <media/v4l2-mem2mem.h>
  31
  32 #include <trace/events/v4l2.h>
  33
  34 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  35
  36 struct std_descr {
  37         v4l2_std_id std;
  38         const char *descr;
  39 };
  40
  41 static const struct std_descr standards[] = {
  42         { V4L2_STD_NTSC,        "NTSC"      },
  43         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  44         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  45         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  46         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  47         { V4L2_STD_PAL,         "PAL"       },
  48         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  49         { V4L2_STD_PAL_B,       "PAL-B"     },
  50         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  51         { V4L2_STD_PAL_G,       "PAL-G"     },
  52         { V4L2_STD_PAL_H,       "PAL-H"     },
  53         { V4L2_STD_PAL_I,       "PAL-I"     },
  54         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  55         { V4L2_STD_PAL_D,       "PAL-D"     },
  56         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  57         { V4L2_STD_PAL_K,       "PAL-K"     },
  58         { V4L2_STD_PAL_M,       "PAL-M"     },
  59         { V4L2_STD_PAL_N,       "PAL-N"     },
  60         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  61         { V4L2_STD_PAL_60,      "PAL-60"    },
  62         { V4L2_STD_SECAM,       "SECAM"     },
  63         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  64         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  65         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  66         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  67         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  68         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  69         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  70         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  71         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  72         { 0,                    "Unknown"   }
  73 };
  74
  75 /* video4linux standard ID conversion to standard name
  76  */
  77 const char *v4l2_norm_to_name(v4l2_std_id id)
  78 {
  79         u32 myid = id;
  80         int i;
  81
  82         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  83            64 bit comparisons. So, on that architecture, with some gcc
  84            variants, compilation fails. Currently, the max value is 30bit wide.
  85          */
  86         BUG_ON(myid != id);
  87
  88         for (i = 0; standards[i].std; i++)
  89                 if (myid == standards[i].std)
  90                         break;
  91         return standards[i].descr;
  92 }
  93 EXPORT_SYMBOL(v4l2_norm_to_name);
  94
  95 /* Returns frame period for the given standard */
  96 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  97 {
  98         if (id & V4L2_STD_525_60) {
  99                 frameperiod->numerator = 1001;
 100                 frameperiod->denominator = 30000;
 101         } else {
 102                 frameperiod->numerator = 1;
 103                 frameperiod->denominator = 25;
 104         }
 105 }
 106 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 107
 108 /* Fill in the fields of a v4l2_standard structure according to the
 109    'id' and 'transmission' parameters.  Returns negative on error.  */
 110 int v4l2_video_std_construct(struct v4l2_standard *vs,
 111                              int id, const char *name)
 112 {
 113         vs->id = id;
 114         v4l2_video_std_frame_period(id, &vs->frameperiod);
 115         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 116         strscpy(vs->name, name, sizeof(vs->name));
 117         return 0;
 118 }
 119 EXPORT_SYMBOL(v4l2_video_std_construct);
 120
 121 /* Fill in the fields of a v4l2_standard structure according to the
 122  * 'id' and 'vs->index' parameters. Returns negative on error. */
 123 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 124 {
 125         v4l2_std_id curr_id = 0;
 126         unsigned int index = vs->index, i, j = 0;
 127         const char *descr = "";
 128
 129         /* Return -ENODATA if the id for the current input
 130            or output is 0, meaning that it doesn't support this API. */
 131         if (id == 0)
 132                 return -ENODATA;
 133
 134         /* Return norm array in a canonical way */
 135         for (i = 0; i <= index && id; i++) {
 136                 /* last std value in the standards array is 0, so this
 137                    while always ends there since (id & 0) == 0. */
 138                 while ((id & standards[j].std) != standards[j].std)
 139                         j++;
 140                 curr_id = standards[j].std;
 141                 descr = standards[j].descr;
 142                 j++;
 143                 if (curr_id == 0)
 144                         break;
 145                 if (curr_id != V4L2_STD_PAL &&
 146                                 curr_id != V4L2_STD_SECAM &&
 147                                 curr_id != V4L2_STD_NTSC)
 148                         id &= ~curr_id;
 149         }
 150         if (i <= index)
 151                 return -EINVAL;
 152
 153         v4l2_video_std_construct(vs, curr_id, descr);
 154         return 0;
 155 }
 156
 157 /* ----------------------------------------------------------------- */
 158 /* some arrays for pretty-printing debug messages of enum types      */
 159
 160 const char *v4l2_field_names[] = {
 161         [V4L2_FIELD_ANY]        = "any",
 162         [V4L2_FIELD_NONE]       = "none",
 163         [V4L2_FIELD_TOP]        = "top",
 164         [V4L2_FIELD_BOTTOM]     = "bottom",
 165         [V4L2_FIELD_INTERLACED] = "interlaced",
 166         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 167         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 168         [V4L2_FIELD_ALTERNATE]  = "alternate",
 169         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 170         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 171 };
 172 EXPORT_SYMBOL(v4l2_field_names);
 173
 174 const char *v4l2_type_names[] = {
 175         [0]                                = "0",
 176         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 177         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 178         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 179         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 180         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 181         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 182         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 183         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 184         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 185         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 186         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 187         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 188         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 189         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 190 };
 191 EXPORT_SYMBOL(v4l2_type_names);
 192
 193 static const char *v4l2_memory_names[] = {
 194         [V4L2_MEMORY_MMAP]    = "mmap",
 195         [V4L2_MEMORY_USERPTR] = "userptr",
 196         [V4L2_MEMORY_OVERLAY] = "overlay",
 197         [V4L2_MEMORY_DMABUF] = "dmabuf",
 198 };
 199
 200 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 201
 202 /* ------------------------------------------------------------------ */
 203 /* debug help functions                                               */
 204
 205 static void v4l_print_querycap(const void *arg, bool write_only)
 206 {
 207         const struct v4l2_capability *p = arg;
 208
 209         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 210                 (int)sizeof(p->driver), p->driver,
 211                 (int)sizeof(p->card), p->card,
 212                 (int)sizeof(p->bus_info), p->bus_info,
 213                 p->version, p->capabilities, p->device_caps);
 214 }
 215
 216 static void v4l_print_enuminput(const void *arg, bool write_only)
 217 {
 218         const struct v4l2_input *p = arg;
 219
 220         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 221                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 222                 p->tuner, (unsigned long long)p->std, p->status,
 223                 p->capabilities);
 224 }
 225
 226 static void v4l_print_enumoutput(const void *arg, bool write_only)
 227 {
 228         const struct v4l2_output *p = arg;
 229
 230         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 231                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 232                 p->modulator, (unsigned long long)p->std, p->capabilities);
 233 }
 234
 235 static void v4l_print_audio(const void *arg, bool write_only)
 236 {
 237         const struct v4l2_audio *p = arg;
 238
 239         if (write_only)
 240                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 241         else
 242                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 243                         p->index, (int)sizeof(p->name), p->name,
 244                         p->capability, p->mode);
 245 }
 246
 247 static void v4l_print_audioout(const void *arg, bool write_only)
 248 {
 249         const struct v4l2_audioout *p = arg;
 250
 251         if (write_only)
 252                 pr_cont("index=%u\n", p->index);
 253         else
 254                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 255                         p->index, (int)sizeof(p->name), p->name,
 256                         p->capability, p->mode);
 257 }
 258
 259 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 260 {
 261         const struct v4l2_fmtdesc *p = arg;
 262
 263         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 264                 p->index, prt_names(p->type, v4l2_type_names),
 265                 p->flags, &p->pixelformat, p->mbus_code,
 266                 (int)sizeof(p->description), p->description);
 267 }
 268
 269 static void v4l_print_format(const void *arg, bool write_only)
 270 {
 271         const struct v4l2_format *p = arg;
 272         const struct v4l2_pix_format *pix;
 273         const struct v4l2_pix_format_mplane *mp;
 274         const struct v4l2_vbi_format *vbi;
 275         const struct v4l2_sliced_vbi_format *sliced;
 276         const struct v4l2_window *win;
 277         const struct v4l2_meta_format *meta;
 278         u32 pixelformat;
 279         u32 planes;
 280         unsigned i;
 281
 282         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 283         switch (p->type) {
 284         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 285         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 286                 pix = &p->fmt.pix;
 287                 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",
 288                         pix->width, pix->height, &pix->pixelformat,
 289                         prt_names(pix->field, v4l2_field_names),
 290                         pix->bytesperline, pix->sizeimage,
 291                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 292                         pix->quantization, pix->xfer_func);
 293                 break;
 294         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 295         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 296                 mp = &p->fmt.pix_mp;
 297                 pixelformat = mp->pixelformat;
 298                 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",
 299                         mp->width, mp->height, &pixelformat,
 300                         prt_names(mp->field, v4l2_field_names),
 301                         mp->colorspace, mp->num_planes, mp->flags,
 302                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 303                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 304                 for (i = 0; i < planes; i++)
 305                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 306                                         mp->plane_fmt[i].bytesperline,
 307                                         mp->plane_fmt[i].sizeimage);
 308                 break;
 309         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 310         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 311                 win = &p->fmt.win;
 312                 /* Note: we can't print the clip list here since the clips
 313                  * pointer is a userspace pointer, not a kernelspace
 314                  * pointer. */
 315                 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",
 316                         win->w.width, win->w.height, win->w.left, win->w.top,
 317                         prt_names(win->field, v4l2_field_names),
 318                         win->chromakey, win->clipcount, win->clips,
 319                         win->bitmap, win->global_alpha);
 320                 break;
 321         case V4L2_BUF_TYPE_VBI_CAPTURE:
 322         case V4L2_BUF_TYPE_VBI_OUTPUT:
 323                 vbi = &p->fmt.vbi;
 324                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 325                         vbi->sampling_rate, vbi->offset,
 326                         vbi->samples_per_line, &vbi->sample_format,
 327                         vbi->start[0], vbi->start[1],
 328                         vbi->count[0], vbi->count[1]);
 329                 break;
 330         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 331         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 332                 sliced = &p->fmt.sliced;
 333                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 334                                 sliced->service_set, sliced->io_size);
 335                 for (i = 0; i < 24; i++)
 336                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 337                                 sliced->service_lines[0][i],
 338                                 sliced->service_lines[1][i]);
 339                 break;
 340         case V4L2_BUF_TYPE_SDR_CAPTURE:
 341         case V4L2_BUF_TYPE_SDR_OUTPUT:
 342                 pixelformat = p->fmt.sdr.pixelformat;
 343                 pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 344                 break;
 345         case V4L2_BUF_TYPE_META_CAPTURE:
 346         case V4L2_BUF_TYPE_META_OUTPUT:
 347                 meta = &p->fmt.meta;
 348                 pixelformat = meta->dataformat;
 349                 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 350                         &pixelformat, meta->buffersize);
 351                 break;
 352         }
 353 }
 354
 355 static void v4l_print_framebuffer(const void *arg, bool write_only)
 356 {
 357         const struct v4l2_framebuffer *p = arg;
 358
 359         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 360                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 361                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 362                 p->fmt.colorspace);
 363 }
 364
 365 static void v4l_print_buftype(const void *arg, bool write_only)
 366 {
 367         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 368 }
 369
 370 static void v4l_print_modulator(const void *arg, bool write_only)
 371 {
 372         const struct v4l2_modulator *p = arg;
 373
 374         if (write_only)
 375                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 376         else
 377                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 378                         p->index, (int)sizeof(p->name), p->name, p->capability,
 379                         p->rangelow, p->rangehigh, p->txsubchans);
 380 }
 381
 382 static void v4l_print_tuner(const void *arg, bool write_only)
 383 {
 384         const struct v4l2_tuner *p = arg;
 385
 386         if (write_only)
 387                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 388         else
 389                 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",
 390                         p->index, (int)sizeof(p->name), p->name, p->type,
 391                         p->capability, p->rangelow,
 392                         p->rangehigh, p->signal, p->afc,
 393                         p->rxsubchans, p->audmode);
 394 }
 395
 396 static void v4l_print_frequency(const void *arg, bool write_only)
 397 {
 398         const struct v4l2_frequency *p = arg;
 399
 400         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 401                                 p->tuner, p->type, p->frequency);
 402 }
 403
 404 static void v4l_print_standard(const void *arg, bool write_only)
 405 {
 406         const struct v4l2_standard *p = arg;
 407
 408         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 409                 p->index,
 410                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 411                 p->frameperiod.numerator,
 412                 p->frameperiod.denominator,
 413                 p->framelines);
 414 }
 415
 416 static void v4l_print_std(const void *arg, bool write_only)
 417 {
 418         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 419 }
 420
 421 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 422 {
 423         const struct v4l2_hw_freq_seek *p = arg;
 424
 425         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 426                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 427                 p->rangelow, p->rangehigh);
 428 }
 429
 430 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 431 {
 432         const struct v4l2_requestbuffers *p = arg;
 433
 434         pr_cont("count=%d, type=%s, memory=%s\n",
 435                 p->count,
 436                 prt_names(p->type, v4l2_type_names),
 437                 prt_names(p->memory, v4l2_memory_names));
 438 }
 439
 440 static void v4l_print_buffer(const void *arg, bool write_only)
 441 {
 442         const struct v4l2_buffer *p = arg;
 443         const struct v4l2_timecode *tc = &p->timecode;
 444         const struct v4l2_plane *plane;
 445         int i;
 446
 447         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 448                         (int)p->timestamp.tv_sec / 3600,
 449                         ((int)p->timestamp.tv_sec / 60) % 60,
 450                         ((int)p->timestamp.tv_sec % 60),
 451                         (long)p->timestamp.tv_usec,
 452                         p->index,
 453                         prt_names(p->type, v4l2_type_names), p->request_fd,
 454                         p->flags, prt_names(p->field, v4l2_field_names),
 455                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 456
 457         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 458                 pr_cont("\n");
 459                 for (i = 0; i < p->length; ++i) {
 460                         plane = &p->m.planes[i];
 461                         printk(KERN_DEBUG
 462                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 463                                 i, plane->bytesused, plane->data_offset,
 464                                 plane->m.userptr, plane->length);
 465                 }
 466         } else {
 467                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 468                         p->bytesused, p->m.userptr, p->length);
 469         }
 470
 471         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 472                         tc->hours, tc->minutes, tc->seconds,
 473                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 474 }
 475
 476 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 477 {
 478         const struct v4l2_exportbuffer *p = arg;
 479
 480         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 481                 p->fd, prt_names(p->type, v4l2_type_names),
 482                 p->index, p->plane, p->flags);
 483 }
 484
 485 static void v4l_print_create_buffers(const void *arg, bool write_only)
 486 {
 487         const struct v4l2_create_buffers *p = arg;
 488
 489         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 490                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 491                 p->capabilities);
 492         v4l_print_format(&p->format, write_only);
 493 }
 494
 495 static void v4l_print_streamparm(const void *arg, bool write_only)
 496 {
 497         const struct v4l2_streamparm *p = arg;
 498
 499         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 500
 501         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 502             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 503                 const struct v4l2_captureparm *c = &p->parm.capture;
 504
 505                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 506                         c->capability, c->capturemode,
 507                         c->timeperframe.numerator, c->timeperframe.denominator,
 508                         c->extendedmode, c->readbuffers);
 509         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 510                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 511                 const struct v4l2_outputparm *c = &p->parm.output;
 512
 513                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 514                         c->capability, c->outputmode,
 515                         c->timeperframe.numerator, c->timeperframe.denominator,
 516                         c->extendedmode, c->writebuffers);
 517         } else {
 518                 pr_cont("\n");
 519         }
 520 }
 521
 522 static void v4l_print_queryctrl(const void *arg, bool write_only)
 523 {
 524         const struct v4l2_queryctrl *p = arg;
 525
 526         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 527                         p->id, p->type, (int)sizeof(p->name), p->name,
 528                         p->minimum, p->maximum,
 529                         p->step, p->default_value, p->flags);
 530 }
 531
 532 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 533 {
 534         const struct v4l2_query_ext_ctrl *p = arg;
 535
 536         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",
 537                         p->id, p->type, (int)sizeof(p->name), p->name,
 538                         p->minimum, p->maximum,
 539                         p->step, p->default_value, p->flags,
 540                         p->elem_size, p->elems, p->nr_of_dims,
 541                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 542 }
 543
 544 static void v4l_print_querymenu(const void *arg, bool write_only)
 545 {
 546         const struct v4l2_querymenu *p = arg;
 547
 548         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 549 }
 550
 551 static void v4l_print_control(const void *arg, bool write_only)
 552 {
 553         const struct v4l2_control *p = arg;
 554         const char *name = v4l2_ctrl_get_name(p->id);
 555
 556         if (name)
 557                 pr_cont("name=%s, ", name);
 558         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 559 }
 560
 561 static void v4l_print_ext_controls(const void *arg, bool write_only)
 562 {
 563         const struct v4l2_ext_controls *p = arg;
 564         int i;
 565
 566         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 567                         p->which, p->count, p->error_idx, p->request_fd);
 568         for (i = 0; i < p->count; i++) {
 569                 unsigned int id = p->controls[i].id;
 570                 const char *name = v4l2_ctrl_get_name(id);
 571
 572                 if (name)
 573                         pr_cont(", name=%s", name);
 574                 if (!p->controls[i].size)
 575                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 576                 else
 577                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 578         }
 579         pr_cont("\n");
 580 }
 581
 582 static void v4l_print_cropcap(const void *arg, bool write_only)
 583 {
 584         const struct v4l2_cropcap *p = arg;
 585
 586         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 587                 prt_names(p->type, v4l2_type_names),
 588                 p->bounds.width, p->bounds.height,
 589                 p->bounds.left, p->bounds.top,
 590                 p->defrect.width, p->defrect.height,
 591                 p->defrect.left, p->defrect.top,
 592                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 593 }
 594
 595 static void v4l_print_crop(const void *arg, bool write_only)
 596 {
 597         const struct v4l2_crop *p = arg;
 598
 599         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 600                 prt_names(p->type, v4l2_type_names),
 601                 p->c.width, p->c.height,
 602                 p->c.left, p->c.top);
 603 }
 604
 605 static void v4l_print_selection(const void *arg, bool write_only)
 606 {
 607         const struct v4l2_selection *p = arg;
 608
 609         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 610                 prt_names(p->type, v4l2_type_names),
 611                 p->target, p->flags,
 612                 p->r.width, p->r.height, p->r.left, p->r.top);
 613 }
 614
 615 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 616 {
 617         const struct v4l2_jpegcompression *p = arg;
 618
 619         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 620                 p->quality, p->APPn, p->APP_len,
 621                 p->COM_len, p->jpeg_markers);
 622 }
 623
 624 static void v4l_print_enc_idx(const void *arg, bool write_only)
 625 {
 626         const struct v4l2_enc_idx *p = arg;
 627
 628         pr_cont("entries=%d, entries_cap=%d\n",
 629                         p->entries, p->entries_cap);
 630 }
 631
 632 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 633 {
 634         const struct v4l2_encoder_cmd *p = arg;
 635
 636         pr_cont("cmd=%d, flags=0x%x\n",
 637                         p->cmd, p->flags);
 638 }
 639
 640 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 641 {
 642         const struct v4l2_decoder_cmd *p = arg;
 643
 644         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 645
 646         if (p->cmd == V4L2_DEC_CMD_START)
 647                 pr_info("speed=%d, format=%u\n",
 648                                 p->start.speed, p->start.format);
 649         else if (p->cmd == V4L2_DEC_CMD_STOP)
 650                 pr_info("pts=%llu\n", p->stop.pts);
 651 }
 652
 653 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 654 {
 655         const struct v4l2_dbg_chip_info *p = arg;
 656
 657         pr_cont("type=%u, ", p->match.type);
 658         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 659                 pr_cont("name=%.*s, ",
 660                                 (int)sizeof(p->match.name), p->match.name);
 661         else
 662                 pr_cont("addr=%u, ", p->match.addr);
 663         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 664 }
 665
 666 static void v4l_print_dbg_register(const void *arg, bool write_only)
 667 {
 668         const struct v4l2_dbg_register *p = arg;
 669
 670         pr_cont("type=%u, ", p->match.type);
 671         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 672                 pr_cont("name=%.*s, ",
 673                                 (int)sizeof(p->match.name), p->match.name);
 674         else
 675                 pr_cont("addr=%u, ", p->match.addr);
 676         pr_cont("reg=0x%llx, val=0x%llx\n",
 677                         p->reg, p->val);
 678 }
 679
 680 static void v4l_print_dv_timings(const void *arg, bool write_only)
 681 {
 682         const struct v4l2_dv_timings *p = arg;
 683
 684         switch (p->type) {
 685         case V4L2_DV_BT_656_1120:
 686                 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",
 687                                 p->bt.interlaced, p->bt.pixelclock,
 688                                 p->bt.width, p->bt.height,
 689                                 p->bt.polarities, p->bt.hfrontporch,
 690                                 p->bt.hsync, p->bt.hbackporch,
 691                                 p->bt.vfrontporch, p->bt.vsync,
 692                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 693                                 p->bt.il_vsync, p->bt.il_vbackporch,
 694                                 p->bt.standards, p->bt.flags);
 695                 break;
 696         default:
 697                 pr_cont("type=%d\n", p->type);
 698                 break;
 699         }
 700 }
 701
 702 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 703 {
 704         const struct v4l2_enum_dv_timings *p = arg;
 705
 706         pr_cont("index=%u, ", p->index);
 707         v4l_print_dv_timings(&p->timings, write_only);
 708 }
 709
 710 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 711 {
 712         const struct v4l2_dv_timings_cap *p = arg;
 713
 714         switch (p->type) {
 715         case V4L2_DV_BT_656_1120:
 716                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 717                         p->bt.min_width, p->bt.max_width,
 718                         p->bt.min_height, p->bt.max_height,
 719                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 720                         p->bt.standards, p->bt.capabilities);
 721                 break;
 722         default:
 723                 pr_cont("type=%u\n", p->type);
 724                 break;
 725         }
 726 }
 727
 728 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 729 {
 730         const struct v4l2_frmsizeenum *p = arg;
 731
 732         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 733                 p->index, &p->pixel_format, p->type);
 734         switch (p->type) {
 735         case V4L2_FRMSIZE_TYPE_DISCRETE:
 736                 pr_cont(", wxh=%ux%u\n",
 737                         p->discrete.width, p->discrete.height);
 738                 break;
 739         case V4L2_FRMSIZE_TYPE_STEPWISE:
 740                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 741                                 p->stepwise.min_width,
 742                                 p->stepwise.min_height,
 743                                 p->stepwise.max_width,
 744                                 p->stepwise.max_height,
 745                                 p->stepwise.step_width,
 746                                 p->stepwise.step_height);
 747                 break;
 748         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 749         default:
 750                 pr_cont("\n");
 751                 break;
 752         }
 753 }
 754
 755 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 756 {
 757         const struct v4l2_frmivalenum *p = arg;
 758
 759         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 760                 p->index, &p->pixel_format, p->width, p->height, p->type);
 761         switch (p->type) {
 762         case V4L2_FRMIVAL_TYPE_DISCRETE:
 763                 pr_cont(", fps=%d/%d\n",
 764                                 p->discrete.numerator,
 765                                 p->discrete.denominator);
 766                 break;
 767         case V4L2_FRMIVAL_TYPE_STEPWISE:
 768                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 769                                 p->stepwise.min.numerator,
 770                                 p->stepwise.min.denominator,
 771                                 p->stepwise.max.numerator,
 772                                 p->stepwise.max.denominator,
 773                                 p->stepwise.step.numerator,
 774                                 p->stepwise.step.denominator);
 775                 break;
 776         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 777         default:
 778                 pr_cont("\n");
 779                 break;
 780         }
 781 }
 782
 783 static void v4l_print_event(const void *arg, bool write_only)
 784 {
 785         const struct v4l2_event *p = arg;
 786         const struct v4l2_event_ctrl *c;
 787
 788         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 789                         p->type, p->pending, p->sequence, p->id,
 790                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 791         switch (p->type) {
 792         case V4L2_EVENT_VSYNC:
 793                 printk(KERN_DEBUG "field=%s\n",
 794                         prt_names(p->u.vsync.field, v4l2_field_names));
 795                 break;
 796         case V4L2_EVENT_CTRL:
 797                 c = &p->u.ctrl;
 798                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 799                         c->changes, c->type);
 800                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 801                         pr_cont("value64=%lld, ", c->value64);
 802                 else
 803                         pr_cont("value=%d, ", c->value);
 804                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 805                         c->flags, c->minimum, c->maximum,
 806                         c->step, c->default_value);
 807                 break;
 808         case V4L2_EVENT_FRAME_SYNC:
 809                 pr_cont("frame_sequence=%u\n",
 810                         p->u.frame_sync.frame_sequence);
 811                 break;
 812         }
 813 }
 814
 815 static void v4l_print_event_subscription(const void *arg, bool write_only)
 816 {
 817         const struct v4l2_event_subscription *p = arg;
 818
 819         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 820                         p->type, p->id, p->flags);
 821 }
 822
 823 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 824 {
 825         const struct v4l2_sliced_vbi_cap *p = arg;
 826         int i;
 827
 828         pr_cont("type=%s, service_set=0x%08x\n",
 829                         prt_names(p->type, v4l2_type_names), p->service_set);
 830         for (i = 0; i < 24; i++)
 831                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 832                                 p->service_lines[0][i],
 833                                 p->service_lines[1][i]);
 834 }
 835
 836 static void v4l_print_freq_band(const void *arg, bool write_only)
 837 {
 838         const struct v4l2_frequency_band *p = arg;
 839
 840         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 841                         p->tuner, p->type, p->index,
 842                         p->capability, p->rangelow,
 843                         p->rangehigh, p->modulation);
 844 }
 845
 846 static void v4l_print_edid(const void *arg, bool write_only)
 847 {
 848         const struct v4l2_edid *p = arg;
 849
 850         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 851                 p->pad, p->start_block, p->blocks);
 852 }
 853
 854 static void v4l_print_u32(const void *arg, bool write_only)
 855 {
 856         pr_cont("value=%u\n", *(const u32 *)arg);
 857 }
 858
 859 static void v4l_print_newline(const void *arg, bool write_only)
 860 {
 861         pr_cont("\n");
 862 }
 863
 864 static void v4l_print_default(const void *arg, bool write_only)
 865 {
 866         pr_cont("driver-specific ioctl\n");
 867 }
 868
 869 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 870 {
 871         __u32 i;
 872
 873         /* zero the reserved fields */
 874         c->reserved[0] = 0;
 875         for (i = 0; i < c->count; i++)
 876                 c->controls[i].reserved2[0] = 0;
 877
 878         switch (c->which) {
 879         case V4L2_CID_PRIVATE_BASE:
 880                 /*
 881                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 882                  * when using extended controls.
 883                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 884                  * is it allowed for backwards compatibility.
 885                  */
 886                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 887                         return false;
 888                 break;
 889         case V4L2_CTRL_WHICH_DEF_VAL:
 890                 /* Default value cannot be changed */
 891                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 892                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 893                         c->error_idx = c->count;
 894                         return false;
 895                 }
 896                 return true;
 897         case V4L2_CTRL_WHICH_CUR_VAL:
 898                 return true;
 899         case V4L2_CTRL_WHICH_REQUEST_VAL:
 900                 c->error_idx = c->count;
 901                 return false;
 902         }
 903
 904         /* Check that all controls are from the same control class. */
 905         for (i = 0; i < c->count; i++) {
 906                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 907                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 908                                                                       c->count;
 909                         return false;
 910                 }
 911         }
 912         return true;
 913 }
 914
 915 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 916 {
 917         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 918                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 919                              V4L2_CAP_VIDEO_OUTPUT |
 920                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 921                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 922         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 923                               V4L2_CAP_META_OUTPUT;
 924         struct video_device *vfd = video_devdata(file);
 925         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 926         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 927                       (vfd->device_caps & vid_caps);
 928         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 929         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 930         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 931         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 932                        (vfd->device_caps & meta_caps);
 933         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 934         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 935
 936         if (ops == NULL)
 937                 return -EINVAL;
 938
 939         switch (type) {
 940         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 941                 if ((is_vid || is_tch) && is_rx &&
 942                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 943                         return 0;
 944                 break;
 945         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 946                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 950                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 954                 if (is_vid && is_tx &&
 955                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 956                         return 0;
 957                 break;
 958         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 959                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 960                         return 0;
 961                 break;
 962         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 963                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 964                         return 0;
 965                 break;
 966         case V4L2_BUF_TYPE_VBI_CAPTURE:
 967                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 968                         return 0;
 969                 break;
 970         case V4L2_BUF_TYPE_VBI_OUTPUT:
 971                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 972                         return 0;
 973                 break;
 974         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 975                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 976                         return 0;
 977                 break;
 978         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 979                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 980                         return 0;
 981                 break;
 982         case V4L2_BUF_TYPE_SDR_CAPTURE:
 983                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 984                         return 0;
 985                 break;
 986         case V4L2_BUF_TYPE_SDR_OUTPUT:
 987                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 988                         return 0;
 989                 break;
 990         case V4L2_BUF_TYPE_META_CAPTURE:
 991                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 992                         return 0;
 993                 break;
 994         case V4L2_BUF_TYPE_META_OUTPUT:
 995                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 996                         return 0;
 997                 break;
 998         default:
 999                 break;
1000         }
1001         return -EINVAL;
1002 }
1003
1004 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
1005                                     u32 *encoding, u32 *quantization,
1006                                     u32 *xfer_func)
1007 {
1008         bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
1009                       pixelformat == V4L2_PIX_FMT_HSV32;
1010
1011         if (!v4l2_is_colorspace_valid(*colorspace)) {
1012                 *colorspace = V4L2_COLORSPACE_DEFAULT;
1013                 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1014                 *quantization = V4L2_QUANTIZATION_DEFAULT;
1015                 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1016         }
1017
1018         if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
1019             (is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
1020                 *encoding = V4L2_YCBCR_ENC_DEFAULT;
1021
1022         if (!v4l2_is_quant_valid(*quantization))
1023                 *quantization = V4L2_QUANTIZATION_DEFAULT;
1024
1025         if (!v4l2_is_xfer_func_valid(*xfer_func))
1026                 *xfer_func = V4L2_XFER_FUNC_DEFAULT;
1027 }
1028
1029 static void v4l_sanitize_format(struct v4l2_format *fmt)
1030 {
1031         unsigned int offset;
1032
1033         /* Make sure num_planes is not bogus */
1034         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1035             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1036                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1037                                                VIDEO_MAX_PLANES);
1038
1039         /*
1040          * The v4l2_pix_format structure has been extended with fields that were
1041          * not previously required to be set to zero by applications. The priv
1042          * field, when set to a magic value, indicates that the extended fields
1043          * are valid. Otherwise they will contain undefined values. To simplify
1044          * the API towards drivers zero the extended fields and set the priv
1045          * field to the magic value when the extended pixel format structure
1046          * isn't used by applications.
1047          */
1048         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1049             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1050                 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
1051                         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1052
1053                         offset = offsetof(struct v4l2_pix_format, priv)
1054                                + sizeof(fmt->fmt.pix.priv);
1055                         memset(((void *)&fmt->fmt.pix) + offset, 0,
1056                                sizeof(fmt->fmt.pix) - offset);
1057                 }
1058         }
1059
1060         /* Replace invalid colorspace values with defaults. */
1061         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1062             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1063                 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
1064                                         &fmt->fmt.pix.colorspace,
1065                                         &fmt->fmt.pix.ycbcr_enc,
1066                                         &fmt->fmt.pix.quantization,
1067                                         &fmt->fmt.pix.xfer_func);
1068         } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1069                    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
1070                 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
1071                 u32 quantization = fmt->fmt.pix_mp.quantization;
1072                 u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
1073
1074                 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
1075                                         &fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
1076                                         &quantization, &xfer_func);
1077
1078                 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
1079                 fmt->fmt.pix_mp.quantization = quantization;
1080                 fmt->fmt.pix_mp.xfer_func = xfer_func;
1081         }
1082 }
1083
1084 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1085                                 struct file *file, void *fh, void *arg)
1086 {
1087         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1088         struct video_device *vfd = video_devdata(file);
1089         int ret;
1090
1091         cap->version = LINUX_VERSION_CODE;
1092         cap->device_caps = vfd->device_caps;
1093         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1094
1095         media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1096                            vfd->dev_parent);
1097
1098         ret = ops->vidioc_querycap(file, fh, cap);
1099
1100         /*
1101          * Drivers must not change device_caps, so check for this and
1102          * warn if this happened.
1103          */
1104         WARN_ON(cap->device_caps != vfd->device_caps);
1105         /*
1106          * Check that capabilities is a superset of
1107          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1108          */
1109         WARN_ON((cap->capabilities &
1110                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1111                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1112         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1113         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1114
1115         return ret;
1116 }
1117
1118 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1119                        struct file *file, void *fh, void *arg)
1120 {
1121         struct video_device *vfd = video_devdata(file);
1122
1123         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1124                 *(int *)arg = 0;
1125                 return 0;
1126         }
1127
1128         return ops->vidioc_g_input(file, fh, arg);
1129 }
1130
1131 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1132                         struct file *file, void *fh, void *arg)
1133 {
1134         struct video_device *vfd = video_devdata(file);
1135
1136         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1137                 *(int *)arg = 0;
1138                 return 0;
1139         }
1140
1141         return ops->vidioc_g_output(file, fh, arg);
1142 }
1143
1144 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1145                                 struct file *file, void *fh, void *arg)
1146 {
1147         struct video_device *vfd = video_devdata(file);
1148         int ret;
1149
1150         ret = v4l_enable_media_source(vfd);
1151         if (ret)
1152                 return ret;
1153
1154         if (vfd->device_caps & V4L2_CAP_IO_MC)
1155                 return  *(int *)arg ? -EINVAL : 0;
1156
1157         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1158 }
1159
1160 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1161                                 struct file *file, void *fh, void *arg)
1162 {
1163         struct video_device *vfd = video_devdata(file);
1164
1165         if (vfd->device_caps & V4L2_CAP_IO_MC)
1166                 return  *(int *)arg ? -EINVAL : 0;
1167
1168         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1169 }
1170
1171 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1172                                 struct file *file, void *fh, void *arg)
1173 {
1174         struct video_device *vfd;
1175         u32 *p = arg;
1176
1177         vfd = video_devdata(file);
1178         *p = v4l2_prio_max(vfd->prio);
1179         return 0;
1180 }
1181
1182 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1183                                 struct file *file, void *fh, void *arg)
1184 {
1185         struct video_device *vfd;
1186         struct v4l2_fh *vfh;
1187         u32 *p = arg;
1188
1189         vfd = video_devdata(file);
1190         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1191                 return -ENOTTY;
1192         vfh = file->private_data;
1193         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1194 }
1195
1196 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1197                                 struct file *file, void *fh, void *arg)
1198 {
1199         struct video_device *vfd = video_devdata(file);
1200         struct v4l2_input *p = arg;
1201
1202         /*
1203          * We set the flags for CAP_DV_TIMINGS &
1204          * CAP_STD here based on ioctl handler provided by the
1205          * driver. If the driver doesn't support these
1206          * for a specific input, it must override these flags.
1207          */
1208         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1209                 p->capabilities |= V4L2_IN_CAP_STD;
1210
1211         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1212                 if (p->index)
1213                         return -EINVAL;
1214                 strscpy(p->name, vfd->name, sizeof(p->name));
1215                 p->type = V4L2_INPUT_TYPE_CAMERA;
1216                 return 0;
1217         }
1218
1219         return ops->vidioc_enum_input(file, fh, p);
1220 }
1221
1222 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1223                                 struct file *file, void *fh, void *arg)
1224 {
1225         struct video_device *vfd = video_devdata(file);
1226         struct v4l2_output *p = arg;
1227
1228         /*
1229          * We set the flags for CAP_DV_TIMINGS &
1230          * CAP_STD here based on ioctl handler provided by the
1231          * driver. If the driver doesn't support these
1232          * for a specific output, it must override these flags.
1233          */
1234         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1235                 p->capabilities |= V4L2_OUT_CAP_STD;
1236
1237         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1238                 if (p->index)
1239                         return -EINVAL;
1240                 strscpy(p->name, vfd->name, sizeof(p->name));
1241                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1242                 return 0;
1243         }
1244
1245         return ops->vidioc_enum_output(file, fh, p);
1246 }
1247
1248 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1249 {
1250         const unsigned sz = sizeof(fmt->description);
1251         const char *descr = NULL;
1252         u32 flags = 0;
1253
1254         /*
1255          * We depart from the normal coding style here since the descriptions
1256          * should be aligned so it is easy to see which descriptions will be
1257          * longer than 31 characters (the max length for a description).
1258          * And frankly, this is easier to read anyway.
1259          *
1260          * Note that gcc will use O(log N) comparisons to find the right case.
1261          */
1262         switch (fmt->pixelformat) {
1263         /* Max description length mask: descr = "0123456789012345678901234567890" */
1264         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1265         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1266         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1267         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1268         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1269         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1270         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1271         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1272         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1273         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1274         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1275         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1276         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1277         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1278         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1279         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1280         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1281         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1282         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1283         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1284         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1285         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1286         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1287         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1288         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1289         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1290         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1291         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1292         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1293         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1294         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1295         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1296         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1297         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1298         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1299         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1300         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1301         case V4L2_PIX_FMT_RGBX1010102:  descr = "32-bit RGBX 10-10-10-2"; break;
1302         case V4L2_PIX_FMT_RGBA1010102:  descr = "32-bit RGBA 10-10-10-2"; break;
1303         case V4L2_PIX_FMT_ARGB2101010:  descr = "32-bit ARGB 2-10-10-10"; break;
1304         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1305         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1306         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1307         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1308         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1309         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1310         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1311         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1312         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1313         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1314         case V4L2_PIX_FMT_IPU3_Y10:     descr = "10-bit greyscale (IPU3 Packed)"; break;
1315         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1316         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1317         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1318         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1319         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1320         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1321         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1322         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1323         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1324         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1325         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1326         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1327         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1328         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1329         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1330         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1331         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1332         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1333         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1334         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1335         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1336         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1337         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1338         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1339         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1340         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1341         case V4L2_PIX_FMT_YUVA32:       descr = "32-bit YUVA 8-8-8-8"; break;
1342         case V4L2_PIX_FMT_YUVX32:       descr = "32-bit YUVX 8-8-8-8"; break;
1343         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1344         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1345         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1346         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1347         case V4L2_PIX_FMT_NV12:         descr = "Y/UV 4:2:0"; break;
1348         case V4L2_PIX_FMT_NV21:         descr = "Y/VU 4:2:0"; break;
1349         case V4L2_PIX_FMT_NV16:         descr = "Y/UV 4:2:2"; break;
1350         case V4L2_PIX_FMT_NV61:         descr = "Y/VU 4:2:2"; break;
1351         case V4L2_PIX_FMT_NV24:         descr = "Y/UV 4:4:4"; break;
1352         case V4L2_PIX_FMT_NV42:         descr = "Y/VU 4:4:4"; break;
1353         case V4L2_PIX_FMT_P010:         descr = "10-bit Y/UV 4:2:0"; break;
1354         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1355         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1356         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1357         case V4L2_PIX_FMT_P010_4L4:     descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1358         case V4L2_PIX_FMT_NV12M:        descr = "Y/UV 4:2:0 (N-C)"; break;
1359         case V4L2_PIX_FMT_NV21M:        descr = "Y/VU 4:2:0 (N-C)"; break;
1360         case V4L2_PIX_FMT_NV16M:        descr = "Y/UV 4:2:2 (N-C)"; break;
1361         case V4L2_PIX_FMT_NV61M:        descr = "Y/VU 4:2:2 (N-C)"; break;
1362         case V4L2_PIX_FMT_NV12MT:       descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1363         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1364         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1365         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1366         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1367         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1368         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1369         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1370         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1371         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1372         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1373         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1374         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1375         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1376         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1377         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1378         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1379         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1380         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1381         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1382         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1383         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1384         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1385         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1386         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1387         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1388         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1389         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1390         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1391         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1392         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1393         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1394         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1395         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1396         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1397         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1398         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1399         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1400         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1401         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1402         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1403         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1404         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1405         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1406         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1407         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1408         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1409         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1410         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1411         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1412         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1413         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1414         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1415         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1416         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1417         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1418         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1419         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1420         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1421         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1422         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1423         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1424         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1425         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1426         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1427         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1428         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1429         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1430         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1431         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1432         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1433         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1434         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1435         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1436         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1437         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1438         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1439         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1440         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1441         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1442         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1443         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1444         case V4L2_PIX_FMT_NV12_8L128:   descr = "NV12 (8x128 Linear)"; break;
1445         case V4L2_PIX_FMT_NV12M_8L128:  descr = "NV12M (8x128 Linear)"; break;
1446         case V4L2_PIX_FMT_NV12_10BE_8L128:      descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1447         case V4L2_PIX_FMT_NV12M_10BE_8L128:     descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1448         case V4L2_PIX_FMT_Y210:         descr = "10-bit YUYV Packed"; break;
1449         case V4L2_PIX_FMT_Y212:         descr = "12-bit YUYV Packed"; break;
1450         case V4L2_PIX_FMT_Y216:         descr = "16-bit YUYV Packed"; break;
1451
1452         default:
1453                 /* Compressed formats */
1454                 flags = V4L2_FMT_FLAG_COMPRESSED;
1455                 switch (fmt->pixelformat) {
1456                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1457                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1458                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1459                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1460                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1461                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1462                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1463                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1464                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1465                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1466                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1467                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1468                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1469                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1470                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1471                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1472                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1473                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1474                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1475                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1476                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1477                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1478                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1479                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1480                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1481                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1482                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1483                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1484                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1485                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1486                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1487                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1488                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1489                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1490                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1491                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1492                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1493                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1494                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1495                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1496                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1497                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1498                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1499                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1500                 case V4L2_PIX_FMT_QC08C:        descr = "QCOM Compressed 8-bit Format"; break;
1501                 case V4L2_PIX_FMT_QC10C:        descr = "QCOM Compressed 10-bit Format"; break;
1502                 case V4L2_PIX_FMT_AJPG:         descr = "Aspeed JPEG"; break;
1503                 default:
1504                         if (fmt->description[0])
1505                                 return;
1506                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1507                         flags = 0;
1508                         snprintf(fmt->description, sz, "%p4cc",
1509                                  &fmt->pixelformat);
1510                         break;
1511                 }
1512         }
1513
1514         if (descr)
1515                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1516         fmt->flags |= flags;
1517 }
1518
1519 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1520                                 struct file *file, void *fh, void *arg)
1521 {
1522         struct video_device *vdev = video_devdata(file);
1523         struct v4l2_fmtdesc *p = arg;
1524         int ret = check_fmt(file, p->type);
1525         u32 mbus_code;
1526         u32 cap_mask;
1527
1528         if (ret)
1529                 return ret;
1530         ret = -EINVAL;
1531
1532         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1533                 p->mbus_code = 0;
1534
1535         mbus_code = p->mbus_code;
1536         memset_after(p, 0, type);
1537         p->mbus_code = mbus_code;
1538
1539         switch (p->type) {
1540         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1541         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1542                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1543                            V4L2_CAP_VIDEO_M2M_MPLANE;
1544                 if (!!(vdev->device_caps & cap_mask) !=
1545                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1546                         break;
1547
1548                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1549                         break;
1550                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1551                 break;
1552         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1553                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1554                         break;
1555                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1556                 break;
1557         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1558         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1559                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1560                            V4L2_CAP_VIDEO_M2M_MPLANE;
1561                 if (!!(vdev->device_caps & cap_mask) !=
1562                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1563                         break;
1564
1565                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1566                         break;
1567                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1568                 break;
1569         case V4L2_BUF_TYPE_SDR_CAPTURE:
1570                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1571                         break;
1572                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1573                 break;
1574         case V4L2_BUF_TYPE_SDR_OUTPUT:
1575                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1576                         break;
1577                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1578                 break;
1579         case V4L2_BUF_TYPE_META_CAPTURE:
1580                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1581                         break;
1582                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1583                 break;
1584         case V4L2_BUF_TYPE_META_OUTPUT:
1585                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1586                         break;
1587                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1588                 break;
1589         }
1590         if (ret == 0)
1591                 v4l_fill_fmtdesc(p);
1592         return ret;
1593 }
1594
1595 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1596 {
1597         /*
1598          * The v4l2_pix_format structure contains fields that make no sense for
1599          * touch. Set them to default values in this case.
1600          */
1601
1602         p->field = V4L2_FIELD_NONE;
1603         p->colorspace = V4L2_COLORSPACE_RAW;
1604         p->flags = 0;
1605         p->ycbcr_enc = 0;
1606         p->quantization = 0;
1607         p->xfer_func = 0;
1608 }
1609
1610 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1611                                 struct file *file, void *fh, void *arg)
1612 {
1613         struct v4l2_format *p = arg;
1614         struct video_device *vfd = video_devdata(file);
1615         int ret = check_fmt(file, p->type);
1616
1617         if (ret)
1618                 return ret;
1619
1620         /*
1621          * fmt can't be cleared for these overlay types due to the 'clips'
1622          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1623          * Those are provided by the user. So handle these two overlay types
1624          * first, and then just do a simple memset for the other types.
1625          */
1626         switch (p->type) {
1627         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1628         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1629                 struct v4l2_clip *clips = p->fmt.win.clips;
1630                 u32 clipcount = p->fmt.win.clipcount;
1631                 void __user *bitmap = p->fmt.win.bitmap;
1632
1633                 memset(&p->fmt, 0, sizeof(p->fmt));
1634                 p->fmt.win.clips = clips;
1635                 p->fmt.win.clipcount = clipcount;
1636                 p->fmt.win.bitmap = bitmap;
1637                 break;
1638         }
1639         default:
1640                 memset(&p->fmt, 0, sizeof(p->fmt));
1641                 break;
1642         }
1643
1644         switch (p->type) {
1645         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1646                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1647                         break;
1648                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1649                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1650                 /* just in case the driver zeroed it again */
1651                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1652                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1653                         v4l_pix_format_touch(&p->fmt.pix);
1654                 return ret;
1655         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1656                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1657         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1658                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1659         case V4L2_BUF_TYPE_VBI_CAPTURE:
1660                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1661         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1662                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1663         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1664                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1665                         break;
1666                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1667                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1668                 /* just in case the driver zeroed it again */
1669                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1670                 return ret;
1671         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1672                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1673         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1674                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1675         case V4L2_BUF_TYPE_VBI_OUTPUT:
1676                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1677         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1678                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1679         case V4L2_BUF_TYPE_SDR_CAPTURE:
1680                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1681         case V4L2_BUF_TYPE_SDR_OUTPUT:
1682                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1683         case V4L2_BUF_TYPE_META_CAPTURE:
1684                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1685         case V4L2_BUF_TYPE_META_OUTPUT:
1686                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1687         }
1688         return -EINVAL;
1689 }
1690
1691 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1692                                 struct file *file, void *fh, void *arg)
1693 {
1694         struct v4l2_format *p = arg;
1695         struct video_device *vfd = video_devdata(file);
1696         int ret = check_fmt(file, p->type);
1697         unsigned int i;
1698
1699         if (ret)
1700                 return ret;
1701
1702         ret = v4l_enable_media_source(vfd);
1703         if (ret)
1704                 return ret;
1705         v4l_sanitize_format(p);
1706
1707         switch (p->type) {
1708         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1709                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1710                         break;
1711                 memset_after(p, 0, fmt.pix);
1712                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1713                 /* just in case the driver zeroed it again */
1714                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1715                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1716                         v4l_pix_format_touch(&p->fmt.pix);
1717                 return ret;
1718         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1719                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1720                         break;
1721                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1722                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1723                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1724                                      0, bytesperline);
1725                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1726         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1727                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1728                         break;
1729                 memset_after(p, 0, fmt.win);
1730                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1731         case V4L2_BUF_TYPE_VBI_CAPTURE:
1732                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1733                         break;
1734                 memset_after(p, 0, fmt.vbi.flags);
1735                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1736         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1737                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1738                         break;
1739                 memset_after(p, 0, fmt.sliced.io_size);
1740                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1741         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1742                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1743                         break;
1744                 memset_after(p, 0, fmt.pix);
1745                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1746                 /* just in case the driver zeroed it again */
1747                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1748                 return ret;
1749         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1750                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1751                         break;
1752                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1753                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1754                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1755                                      0, bytesperline);
1756                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1757         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1758                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1759                         break;
1760                 memset_after(p, 0, fmt.win);
1761                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1762         case V4L2_BUF_TYPE_VBI_OUTPUT:
1763                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1764                         break;
1765                 memset_after(p, 0, fmt.vbi.flags);
1766                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1767         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1768                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1769                         break;
1770                 memset_after(p, 0, fmt.sliced.io_size);
1771                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1772         case V4L2_BUF_TYPE_SDR_CAPTURE:
1773                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1774                         break;
1775                 memset_after(p, 0, fmt.sdr.buffersize);
1776                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1777         case V4L2_BUF_TYPE_SDR_OUTPUT:
1778                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1779                         break;
1780                 memset_after(p, 0, fmt.sdr.buffersize);
1781                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1782         case V4L2_BUF_TYPE_META_CAPTURE:
1783                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1784                         break;
1785                 memset_after(p, 0, fmt.meta);
1786                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1787         case V4L2_BUF_TYPE_META_OUTPUT:
1788                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1789                         break;
1790                 memset_after(p, 0, fmt.meta);
1791                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1792         }
1793         return -EINVAL;
1794 }
1795
1796 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1797                                 struct file *file, void *fh, void *arg)
1798 {
1799         struct v4l2_format *p = arg;
1800         struct video_device *vfd = video_devdata(file);
1801         int ret = check_fmt(file, p->type);
1802         unsigned int i;
1803
1804         if (ret)
1805                 return ret;
1806
1807         v4l_sanitize_format(p);
1808
1809         switch (p->type) {
1810         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1811                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1812                         break;
1813                 memset_after(p, 0, fmt.pix);
1814                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1815                 /* just in case the driver zeroed it again */
1816                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1817                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1818                         v4l_pix_format_touch(&p->fmt.pix);
1819                 return ret;
1820         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1821                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1822                         break;
1823                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1824                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1825                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1826                                      0, bytesperline);
1827                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1828         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1829                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1830                         break;
1831                 memset_after(p, 0, fmt.win);
1832                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1833         case V4L2_BUF_TYPE_VBI_CAPTURE:
1834                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1835                         break;
1836                 memset_after(p, 0, fmt.vbi.flags);
1837                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1838         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1839                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1840                         break;
1841                 memset_after(p, 0, fmt.sliced.io_size);
1842                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1843         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1844                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1845                         break;
1846                 memset_after(p, 0, fmt.pix);
1847                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1848                 /* just in case the driver zeroed it again */
1849                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1850                 return ret;
1851         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1852                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1853                         break;
1854                 memset_after(p, 0, fmt.pix_mp.xfer_func);
1855                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1856                         memset_after(&p->fmt.pix_mp.plane_fmt[i],
1857                                      0, bytesperline);
1858                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1859         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1860                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1861                         break;
1862                 memset_after(p, 0, fmt.win);
1863                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1864         case V4L2_BUF_TYPE_VBI_OUTPUT:
1865                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1866                         break;
1867                 memset_after(p, 0, fmt.vbi.flags);
1868                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1869         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1870                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1871                         break;
1872                 memset_after(p, 0, fmt.sliced.io_size);
1873                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1874         case V4L2_BUF_TYPE_SDR_CAPTURE:
1875                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1876                         break;
1877                 memset_after(p, 0, fmt.sdr.buffersize);
1878                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1879         case V4L2_BUF_TYPE_SDR_OUTPUT:
1880                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1881                         break;
1882                 memset_after(p, 0, fmt.sdr.buffersize);
1883                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1884         case V4L2_BUF_TYPE_META_CAPTURE:
1885                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1886                         break;
1887                 memset_after(p, 0, fmt.meta);
1888                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1889         case V4L2_BUF_TYPE_META_OUTPUT:
1890                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1891                         break;
1892                 memset_after(p, 0, fmt.meta);
1893                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1894         }
1895         return -EINVAL;
1896 }
1897
1898 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1899                                 struct file *file, void *fh, void *arg)
1900 {
1901         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1902 }
1903
1904 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1905                                 struct file *file, void *fh, void *arg)
1906 {
1907         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1908 }
1909
1910 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1911                                 struct file *file, void *fh, void *arg)
1912 {
1913         struct video_device *vfd = video_devdata(file);
1914         struct v4l2_tuner *p = arg;
1915         int err;
1916
1917         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1918                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1919         err = ops->vidioc_g_tuner(file, fh, p);
1920         if (!err)
1921                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1922         return err;
1923 }
1924
1925 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1926                                 struct file *file, void *fh, void *arg)
1927 {
1928         struct video_device *vfd = video_devdata(file);
1929         struct v4l2_tuner *p = arg;
1930         int ret;
1931
1932         ret = v4l_enable_media_source(vfd);
1933         if (ret)
1934                 return ret;
1935         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1936                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1937         return ops->vidioc_s_tuner(file, fh, p);
1938 }
1939
1940 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1941                                 struct file *file, void *fh, void *arg)
1942 {
1943         struct video_device *vfd = video_devdata(file);
1944         struct v4l2_modulator *p = arg;
1945         int err;
1946
1947         if (vfd->vfl_type == VFL_TYPE_RADIO)
1948                 p->type = V4L2_TUNER_RADIO;
1949
1950         err = ops->vidioc_g_modulator(file, fh, p);
1951         if (!err)
1952                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1953         return err;
1954 }
1955
1956 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1957                                 struct file *file, void *fh, void *arg)
1958 {
1959         struct video_device *vfd = video_devdata(file);
1960         struct v4l2_modulator *p = arg;
1961
1962         if (vfd->vfl_type == VFL_TYPE_RADIO)
1963                 p->type = V4L2_TUNER_RADIO;
1964
1965         return ops->vidioc_s_modulator(file, fh, p);
1966 }
1967
1968 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1969                                 struct file *file, void *fh, void *arg)
1970 {
1971         struct video_device *vfd = video_devdata(file);
1972         struct v4l2_frequency *p = arg;
1973
1974         if (vfd->vfl_type == VFL_TYPE_SDR)
1975                 p->type = V4L2_TUNER_SDR;
1976         else
1977                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1978                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1979         return ops->vidioc_g_frequency(file, fh, p);
1980 }
1981
1982 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1983                                 struct file *file, void *fh, void *arg)
1984 {
1985         struct video_device *vfd = video_devdata(file);
1986         const struct v4l2_frequency *p = arg;
1987         enum v4l2_tuner_type type;
1988         int ret;
1989
1990         ret = v4l_enable_media_source(vfd);
1991         if (ret)
1992                 return ret;
1993         if (vfd->vfl_type == VFL_TYPE_SDR) {
1994                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1995                         return -EINVAL;
1996         } else {
1997                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1998                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1999                 if (type != p->type)
2000                         return -EINVAL;
2001         }
2002         return ops->vidioc_s_frequency(file, fh, p);
2003 }
2004
2005 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008         struct video_device *vfd = video_devdata(file);
2009         struct v4l2_standard *p = arg;
2010
2011         return v4l_video_std_enumstd(p, vfd->tvnorms);
2012 }
2013
2014 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2015                                 struct file *file, void *fh, void *arg)
2016 {
2017         struct video_device *vfd = video_devdata(file);
2018         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2019         int ret;
2020
2021         ret = v4l_enable_media_source(vfd);
2022         if (ret)
2023                 return ret;
2024         norm = id & vfd->tvnorms;
2025         if (vfd->tvnorms && !norm)      /* Check if std is supported */
2026                 return -EINVAL;
2027
2028         /* Calls the specific handler */
2029         return ops->vidioc_s_std(file, fh, norm);
2030 }
2031
2032 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2033                                 struct file *file, void *fh, void *arg)
2034 {
2035         struct video_device *vfd = video_devdata(file);
2036         v4l2_std_id *p = arg;
2037         int ret;
2038
2039         ret = v4l_enable_media_source(vfd);
2040         if (ret)
2041                 return ret;
2042         /*
2043          * If no signal is detected, then the driver should return
2044          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2045          * any standards that do not apply removed.
2046          *
2047          * This means that tuners, audio and video decoders can join
2048          * their efforts to improve the standards detection.
2049          */
2050         *p = vfd->tvnorms;
2051         return ops->vidioc_querystd(file, fh, arg);
2052 }
2053
2054 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2055                                 struct file *file, void *fh, void *arg)
2056 {
2057         struct video_device *vfd = video_devdata(file);
2058         struct v4l2_hw_freq_seek *p = arg;
2059         enum v4l2_tuner_type type;
2060         int ret;
2061
2062         ret = v4l_enable_media_source(vfd);
2063         if (ret)
2064                 return ret;
2065         /* s_hw_freq_seek is not supported for SDR for now */
2066         if (vfd->vfl_type == VFL_TYPE_SDR)
2067                 return -EINVAL;
2068
2069         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2070                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2071         if (p->type != type)
2072                 return -EINVAL;
2073         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2074 }
2075
2076 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2077                                 struct file *file, void *fh, void *arg)
2078 {
2079         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2080 }
2081
2082 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2083                                 struct file *file, void *fh, void *arg)
2084 {
2085         struct v4l2_requestbuffers *p = arg;
2086         int ret = check_fmt(file, p->type);
2087
2088         if (ret)
2089                 return ret;
2090
2091         memset_after(p, 0, flags);
2092
2093         return ops->vidioc_reqbufs(file, fh, p);
2094 }
2095
2096 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2097                                 struct file *file, void *fh, void *arg)
2098 {
2099         struct v4l2_buffer *p = arg;
2100         int ret = check_fmt(file, p->type);
2101
2102         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2103 }
2104
2105 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2106                                 struct file *file, void *fh, void *arg)
2107 {
2108         struct v4l2_buffer *p = arg;
2109         int ret = check_fmt(file, p->type);
2110
2111         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2112 }
2113
2114 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2115                                 struct file *file, void *fh, void *arg)
2116 {
2117         struct v4l2_buffer *p = arg;
2118         int ret = check_fmt(file, p->type);
2119
2120         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2121 }
2122
2123 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2124                                 struct file *file, void *fh, void *arg)
2125 {
2126         struct v4l2_create_buffers *create = arg;
2127         int ret = check_fmt(file, create->format.type);
2128
2129         if (ret)
2130                 return ret;
2131
2132         memset_after(create, 0, flags);
2133
2134         v4l_sanitize_format(&create->format);
2135
2136         ret = ops->vidioc_create_bufs(file, fh, create);
2137
2138         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2139             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2140                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2141
2142         return ret;
2143 }
2144
2145 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2146                                 struct file *file, void *fh, void *arg)
2147 {
2148         struct v4l2_buffer *b = arg;
2149         int ret = check_fmt(file, b->type);
2150
2151         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2152 }
2153
2154 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2155                                 struct file *file, void *fh, void *arg)
2156 {
2157         struct video_device *vfd = video_devdata(file);
2158         struct v4l2_streamparm *p = arg;
2159         v4l2_std_id std;
2160         int ret = check_fmt(file, p->type);
2161
2162         if (ret)
2163                 return ret;
2164         if (ops->vidioc_g_parm)
2165                 return ops->vidioc_g_parm(file, fh, p);
2166         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2167             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2168                 return -EINVAL;
2169         if (vfd->device_caps & V4L2_CAP_READWRITE)
2170                 p->parm.capture.readbuffers = 2;
2171         ret = ops->vidioc_g_std(file, fh, &std);
2172         if (ret == 0)
2173                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2174         return ret;
2175 }
2176
2177 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2178                                 struct file *file, void *fh, void *arg)
2179 {
2180         struct v4l2_streamparm *p = arg;
2181         int ret = check_fmt(file, p->type);
2182
2183         if (ret)
2184                 return ret;
2185
2186         /* Note: extendedmode is never used in drivers */
2187         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2188                 memset(p->parm.output.reserved, 0,
2189                        sizeof(p->parm.output.reserved));
2190                 p->parm.output.extendedmode = 0;
2191                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2192         } else {
2193                 memset(p->parm.capture.reserved, 0,
2194                        sizeof(p->parm.capture.reserved));
2195                 p->parm.capture.extendedmode = 0;
2196                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2197         }
2198         return ops->vidioc_s_parm(file, fh, p);
2199 }
2200
2201 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2202                                 struct file *file, void *fh, void *arg)
2203 {
2204         struct video_device *vfd = video_devdata(file);
2205         struct v4l2_queryctrl *p = arg;
2206         struct v4l2_fh *vfh =
2207                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2208
2209         if (vfh && vfh->ctrl_handler)
2210                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2211         if (vfd->ctrl_handler)
2212                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2213         if (ops->vidioc_queryctrl)
2214                 return ops->vidioc_queryctrl(file, fh, p);
2215         return -ENOTTY;
2216 }
2217
2218 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2219                                 struct file *file, void *fh, void *arg)
2220 {
2221         struct video_device *vfd = video_devdata(file);
2222         struct v4l2_query_ext_ctrl *p = arg;
2223         struct v4l2_fh *vfh =
2224                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2225
2226         if (vfh && vfh->ctrl_handler)
2227                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2228         if (vfd->ctrl_handler)
2229                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2230         if (ops->vidioc_query_ext_ctrl)
2231                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2232         return -ENOTTY;
2233 }
2234
2235 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2236                                 struct file *file, void *fh, void *arg)
2237 {
2238         struct video_device *vfd = video_devdata(file);
2239         struct v4l2_querymenu *p = arg;
2240         struct v4l2_fh *vfh =
2241                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2242
2243         if (vfh && vfh->ctrl_handler)
2244                 return v4l2_querymenu(vfh->ctrl_handler, p);
2245         if (vfd->ctrl_handler)
2246                 return v4l2_querymenu(vfd->ctrl_handler, p);
2247         if (ops->vidioc_querymenu)
2248                 return ops->vidioc_querymenu(file, fh, p);
2249         return -ENOTTY;
2250 }
2251
2252 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2253                                 struct file *file, void *fh, void *arg)
2254 {
2255         struct video_device *vfd = video_devdata(file);
2256         struct v4l2_control *p = arg;
2257         struct v4l2_fh *vfh =
2258                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2259         struct v4l2_ext_controls ctrls;
2260         struct v4l2_ext_control ctrl;
2261
2262         if (vfh && vfh->ctrl_handler)
2263                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2264         if (vfd->ctrl_handler)
2265                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2266         if (ops->vidioc_g_ctrl)
2267                 return ops->vidioc_g_ctrl(file, fh, p);
2268         if (ops->vidioc_g_ext_ctrls == NULL)
2269                 return -ENOTTY;
2270
2271         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2272         ctrls.count = 1;
2273         ctrls.controls = &ctrl;
2274         ctrl.id = p->id;
2275         ctrl.value = p->value;
2276         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2277                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2278
2279                 if (ret == 0)
2280                         p->value = ctrl.value;
2281                 return ret;
2282         }
2283         return -EINVAL;
2284 }
2285
2286 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2287                                 struct file *file, void *fh, void *arg)
2288 {
2289         struct video_device *vfd = video_devdata(file);
2290         struct v4l2_control *p = arg;
2291         struct v4l2_fh *vfh =
2292                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2293         struct v4l2_ext_controls ctrls;
2294         struct v4l2_ext_control ctrl;
2295         int ret;
2296
2297         if (vfh && vfh->ctrl_handler)
2298                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2299         if (vfd->ctrl_handler)
2300                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2301         if (ops->vidioc_s_ctrl)
2302                 return ops->vidioc_s_ctrl(file, fh, p);
2303         if (ops->vidioc_s_ext_ctrls == NULL)
2304                 return -ENOTTY;
2305
2306         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2307         ctrls.count = 1;
2308         ctrls.controls = &ctrl;
2309         ctrl.id = p->id;
2310         ctrl.value = p->value;
2311         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2312                 return -EINVAL;
2313         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2314         p->value = ctrl.value;
2315         return ret;
2316 }
2317
2318 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2319                                 struct file *file, void *fh, void *arg)
2320 {
2321         struct video_device *vfd = video_devdata(file);
2322         struct v4l2_ext_controls *p = arg;
2323         struct v4l2_fh *vfh =
2324                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2325
2326         p->error_idx = p->count;
2327         if (vfh && vfh->ctrl_handler)
2328                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2329                                         vfd, vfd->v4l2_dev->mdev, p);
2330         if (vfd->ctrl_handler)
2331                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2332                                         vfd, vfd->v4l2_dev->mdev, p);
2333         if (ops->vidioc_g_ext_ctrls == NULL)
2334                 return -ENOTTY;
2335         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2336                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2337 }
2338
2339 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2340                                 struct file *file, void *fh, void *arg)
2341 {
2342         struct video_device *vfd = video_devdata(file);
2343         struct v4l2_ext_controls *p = arg;
2344         struct v4l2_fh *vfh =
2345                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2346
2347         p->error_idx = p->count;
2348         if (vfh && vfh->ctrl_handler)
2349                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2350                                         vfd, vfd->v4l2_dev->mdev, p);
2351         if (vfd->ctrl_handler)
2352                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2353                                         vfd, vfd->v4l2_dev->mdev, p);
2354         if (ops->vidioc_s_ext_ctrls == NULL)
2355                 return -ENOTTY;
2356         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2357                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2358 }
2359
2360 static int v4l_try_ext_ctrls(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_ext_controls *p = arg;
2365         struct v4l2_fh *vfh =
2366                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2367
2368         p->error_idx = p->count;
2369         if (vfh && vfh->ctrl_handler)
2370                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2371                                           vfd, vfd->v4l2_dev->mdev, p);
2372         if (vfd->ctrl_handler)
2373                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2374                                           vfd, vfd->v4l2_dev->mdev, p);
2375         if (ops->vidioc_try_ext_ctrls == NULL)
2376                 return -ENOTTY;
2377         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2378                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2379 }
2380
2381 /*
2382  * The selection API specified originally that the _MPLANE buffer types
2383  * shouldn't be used. The reasons for this are lost in the mists of time
2384  * (or just really crappy memories). Regardless, this is really annoying
2385  * for userspace. So to keep things simple we map _MPLANE buffer types
2386  * to their 'regular' counterparts before calling the driver. And we
2387  * restore it afterwards. This way applications can use either buffer
2388  * type and drivers don't need to check for both.
2389  */
2390 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2391                            struct file *file, void *fh, void *arg)
2392 {
2393         struct v4l2_selection *p = arg;
2394         u32 old_type = p->type;
2395         int ret;
2396
2397         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2398                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2399         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2400                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2401         ret = ops->vidioc_g_selection(file, fh, p);
2402         p->type = old_type;
2403         return ret;
2404 }
2405
2406 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2407                            struct file *file, void *fh, void *arg)
2408 {
2409         struct v4l2_selection *p = arg;
2410         u32 old_type = p->type;
2411         int ret;
2412
2413         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2414                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2415         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2416                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2417         ret = ops->vidioc_s_selection(file, fh, p);
2418         p->type = old_type;
2419         return ret;
2420 }
2421
2422 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2423                                 struct file *file, void *fh, void *arg)
2424 {
2425         struct video_device *vfd = video_devdata(file);
2426         struct v4l2_crop *p = arg;
2427         struct v4l2_selection s = {
2428                 .type = p->type,
2429         };
2430         int ret;
2431
2432         /* simulate capture crop using selection api */
2433
2434         /* crop means compose for output devices */
2435         if (V4L2_TYPE_IS_OUTPUT(p->type))
2436                 s.target = V4L2_SEL_TGT_COMPOSE;
2437         else
2438                 s.target = V4L2_SEL_TGT_CROP;
2439
2440         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2441                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2442                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2443
2444         ret = v4l_g_selection(ops, file, fh, &s);
2445
2446         /* copying results to old structure on success */
2447         if (!ret)
2448                 p->c = s.r;
2449         return ret;
2450 }
2451
2452 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2453                                 struct file *file, void *fh, void *arg)
2454 {
2455         struct video_device *vfd = video_devdata(file);
2456         struct v4l2_crop *p = arg;
2457         struct v4l2_selection s = {
2458                 .type = p->type,
2459                 .r = p->c,
2460         };
2461
2462         /* simulate capture crop using selection api */
2463
2464         /* crop means compose for output devices */
2465         if (V4L2_TYPE_IS_OUTPUT(p->type))
2466                 s.target = V4L2_SEL_TGT_COMPOSE;
2467         else
2468                 s.target = V4L2_SEL_TGT_CROP;
2469
2470         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2471                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2472                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2473
2474         return v4l_s_selection(ops, file, fh, &s);
2475 }
2476
2477 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2478                                 struct file *file, void *fh, void *arg)
2479 {
2480         struct video_device *vfd = video_devdata(file);
2481         struct v4l2_cropcap *p = arg;
2482         struct v4l2_selection s = { .type = p->type };
2483         int ret = 0;
2484
2485         /* setting trivial pixelaspect */
2486         p->pixelaspect.numerator = 1;
2487         p->pixelaspect.denominator = 1;
2488
2489         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2490                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2491         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2492                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2493
2494         /*
2495          * The determine_valid_ioctls() call already should ensure
2496          * that this can never happen, but just in case...
2497          */
2498         if (WARN_ON(!ops->vidioc_g_selection))
2499                 return -ENOTTY;
2500
2501         if (ops->vidioc_g_pixelaspect)
2502                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2503                                                 &p->pixelaspect);
2504
2505         /*
2506          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2507          * square pixel aspect ratio in that case.
2508          */
2509         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2510                 return ret;
2511
2512         /* Use g_selection() to fill in the bounds and defrect rectangles */
2513
2514         /* obtaining bounds */
2515         if (V4L2_TYPE_IS_OUTPUT(p->type))
2516                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2517         else
2518                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2519
2520         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2521                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2522                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2523
2524         ret = v4l_g_selection(ops, file, fh, &s);
2525         if (ret)
2526                 return ret;
2527         p->bounds = s.r;
2528
2529         /* obtaining defrect */
2530         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2531                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2532         else
2533                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2534
2535         ret = v4l_g_selection(ops, file, fh, &s);
2536         if (ret)
2537                 return ret;
2538         p->defrect = s.r;
2539
2540         return 0;
2541 }
2542
2543 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2544                                 struct file *file, void *fh, void *arg)
2545 {
2546         struct video_device *vfd = video_devdata(file);
2547         int ret;
2548
2549         if (vfd->v4l2_dev)
2550                 pr_info("%s: =================  START STATUS  =================\n",
2551                         vfd->v4l2_dev->name);
2552         ret = ops->vidioc_log_status(file, fh);
2553         if (vfd->v4l2_dev)
2554                 pr_info("%s: ==================  END STATUS  ==================\n",
2555                         vfd->v4l2_dev->name);
2556         return ret;
2557 }
2558
2559 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2560                                 struct file *file, void *fh, void *arg)
2561 {
2562 #ifdef CONFIG_VIDEO_ADV_DEBUG
2563         struct v4l2_dbg_register *p = arg;
2564         struct video_device *vfd = video_devdata(file);
2565         struct v4l2_subdev *sd;
2566         int idx = 0;
2567
2568         if (!capable(CAP_SYS_ADMIN))
2569                 return -EPERM;
2570         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2571                 if (vfd->v4l2_dev == NULL)
2572                         return -EINVAL;
2573                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2574                         if (p->match.addr == idx++)
2575                                 return v4l2_subdev_call(sd, core, g_register, p);
2576                 return -EINVAL;
2577         }
2578         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2579             (ops->vidioc_g_chip_info || p->match.addr == 0))
2580                 return ops->vidioc_g_register(file, fh, p);
2581         return -EINVAL;
2582 #else
2583         return -ENOTTY;
2584 #endif
2585 }
2586
2587 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2588                                 struct file *file, void *fh, void *arg)
2589 {
2590 #ifdef CONFIG_VIDEO_ADV_DEBUG
2591         const struct v4l2_dbg_register *p = arg;
2592         struct video_device *vfd = video_devdata(file);
2593         struct v4l2_subdev *sd;
2594         int idx = 0;
2595
2596         if (!capable(CAP_SYS_ADMIN))
2597                 return -EPERM;
2598         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2599                 if (vfd->v4l2_dev == NULL)
2600                         return -EINVAL;
2601                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2602                         if (p->match.addr == idx++)
2603                                 return v4l2_subdev_call(sd, core, s_register, p);
2604                 return -EINVAL;
2605         }
2606         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2607             (ops->vidioc_g_chip_info || p->match.addr == 0))
2608                 return ops->vidioc_s_register(file, fh, p);
2609         return -EINVAL;
2610 #else
2611         return -ENOTTY;
2612 #endif
2613 }
2614
2615 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2616                                 struct file *file, void *fh, void *arg)
2617 {
2618 #ifdef CONFIG_VIDEO_ADV_DEBUG
2619         struct video_device *vfd = video_devdata(file);
2620         struct v4l2_dbg_chip_info *p = arg;
2621         struct v4l2_subdev *sd;
2622         int idx = 0;
2623
2624         switch (p->match.type) {
2625         case V4L2_CHIP_MATCH_BRIDGE:
2626                 if (ops->vidioc_s_register)
2627                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2628                 if (ops->vidioc_g_register)
2629                         p->flags |= V4L2_CHIP_FL_READABLE;
2630                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2631                 if (ops->vidioc_g_chip_info)
2632                         return ops->vidioc_g_chip_info(file, fh, arg);
2633                 if (p->match.addr)
2634                         return -EINVAL;
2635                 return 0;
2636
2637         case V4L2_CHIP_MATCH_SUBDEV:
2638                 if (vfd->v4l2_dev == NULL)
2639                         break;
2640                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2641                         if (p->match.addr != idx++)
2642                                 continue;
2643                         if (sd->ops->core && sd->ops->core->s_register)
2644                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2645                         if (sd->ops->core && sd->ops->core->g_register)
2646                                 p->flags |= V4L2_CHIP_FL_READABLE;
2647                         strscpy(p->name, sd->name, sizeof(p->name));
2648                         return 0;
2649                 }
2650                 break;
2651         }
2652         return -EINVAL;
2653 #else
2654         return -ENOTTY;
2655 #endif
2656 }
2657
2658 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2659                                 struct file *file, void *fh, void *arg)
2660 {
2661         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2662 }
2663
2664 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2665                                 struct file *file, void *fh, void *arg)
2666 {
2667         return ops->vidioc_subscribe_event(fh, arg);
2668 }
2669
2670 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2671                                 struct file *file, void *fh, void *arg)
2672 {
2673         return ops->vidioc_unsubscribe_event(fh, arg);
2674 }
2675
2676 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2677                                 struct file *file, void *fh, void *arg)
2678 {
2679         struct v4l2_sliced_vbi_cap *p = arg;
2680         int ret = check_fmt(file, p->type);
2681
2682         if (ret)
2683                 return ret;
2684
2685         /* Clear up to type, everything after type is zeroed already */
2686         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2687
2688         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2689 }
2690
2691 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2692                                 struct file *file, void *fh, void *arg)
2693 {
2694         struct video_device *vfd = video_devdata(file);
2695         struct v4l2_frequency_band *p = arg;
2696         enum v4l2_tuner_type type;
2697         int err;
2698
2699         if (vfd->vfl_type == VFL_TYPE_SDR) {
2700                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2701                         return -EINVAL;
2702                 type = p->type;
2703         } else {
2704                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2705                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2706                 if (type != p->type)
2707                         return -EINVAL;
2708         }
2709         if (ops->vidioc_enum_freq_bands) {
2710                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2711                 if (err != -ENOTTY)
2712                         return err;
2713         }
2714         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2715                 struct v4l2_tuner t = {
2716                         .index = p->tuner,
2717                         .type = type,
2718                 };
2719
2720                 if (p->index)
2721                         return -EINVAL;
2722                 err = ops->vidioc_g_tuner(file, fh, &t);
2723                 if (err)
2724                         return err;
2725                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2726                 p->rangelow = t.rangelow;
2727                 p->rangehigh = t.rangehigh;
2728                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2729                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2730                 return 0;
2731         }
2732         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2733                 struct v4l2_modulator m = {
2734                         .index = p->tuner,
2735                 };
2736
2737                 if (type != V4L2_TUNER_RADIO)
2738                         return -EINVAL;
2739                 if (p->index)
2740                         return -EINVAL;
2741                 err = ops->vidioc_g_modulator(file, fh, &m);
2742                 if (err)
2743                         return err;
2744                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2745                 p->rangelow = m.rangelow;
2746                 p->rangehigh = m.rangehigh;
2747                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2748                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2749                 return 0;
2750         }
2751         return -ENOTTY;
2752 }
2753
2754 struct v4l2_ioctl_info {
2755         unsigned int ioctl;
2756         u32 flags;
2757         const char * const name;
2758         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2759                     void *fh, void *p);
2760         void (*debug)(const void *arg, bool write_only);
2761 };
2762
2763 /* This control needs a priority check */
2764 #define INFO_FL_PRIO            (1 << 0)
2765 /* This control can be valid if the filehandle passes a control handler. */
2766 #define INFO_FL_CTRL            (1 << 1)
2767 /* Queuing ioctl */
2768 #define INFO_FL_QUEUE           (1 << 2)
2769 /* Always copy back result, even on error */
2770 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2771 /* Zero struct from after the field to the end */
2772 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2773         ((offsetof(struct v4l2_struct, field) +                 \
2774           sizeof_field(struct v4l2_struct, field)) << 16)
2775 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2776
2777 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2778         static int v4l_stub_ ## _vidioc(                        \
2779                         const struct v4l2_ioctl_ops *ops,       \
2780                         struct file *file, void *fh, void *p)   \
2781         {                                                       \
2782                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2783         }
2784
2785 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2786         [_IOC_NR(_ioctl)] = {                                   \
2787                 .ioctl = _ioctl,                                \
2788                 .flags = _flags,                                \
2789                 .name = #_ioctl,                                \
2790                 .func = _func,                                  \
2791                 .debug = _debug,                                \
2792         }
2793
2794 DEFINE_V4L_STUB_FUNC(g_fbuf)
2795 DEFINE_V4L_STUB_FUNC(s_fbuf)
2796 DEFINE_V4L_STUB_FUNC(expbuf)
2797 DEFINE_V4L_STUB_FUNC(g_std)
2798 DEFINE_V4L_STUB_FUNC(g_audio)
2799 DEFINE_V4L_STUB_FUNC(s_audio)
2800 DEFINE_V4L_STUB_FUNC(g_edid)
2801 DEFINE_V4L_STUB_FUNC(s_edid)
2802 DEFINE_V4L_STUB_FUNC(g_audout)
2803 DEFINE_V4L_STUB_FUNC(s_audout)
2804 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2805 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2806 DEFINE_V4L_STUB_FUNC(enumaudio)
2807 DEFINE_V4L_STUB_FUNC(enumaudout)
2808 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2809 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2810 DEFINE_V4L_STUB_FUNC(g_enc_index)
2811 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2812 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2813 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2814 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2815 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2816 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2817 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2818 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2819 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2820
2821 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2822         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2823         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2824         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2825         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2826         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2827         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2828         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2829         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2830         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2831         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2832         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2833         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2834         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2835         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2836         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2837         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2838         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2839         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2840         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2841         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2842         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2843         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2844         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2845         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2846         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2847         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2848         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2849         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2850         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2851         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2852         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2853         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2854         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2855         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2856         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2857         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2858         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2859         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2860         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2861         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2862         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2863         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2864         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2865         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2866         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2867         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2868         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2869         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2870         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2871         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2872         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2873         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2874         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2875         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2876         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)),
2877         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2878         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2879         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2880         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2881         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2882         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2883         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2884         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2885         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2886         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2887         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2888         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2889         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2890         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2891         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)),
2892         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2893         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2894         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2895         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2896         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2897         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2898         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2899         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2900         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2901         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2902         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)),
2903         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)),
2904 };
2905 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2906
2907 static bool v4l2_is_known_ioctl(unsigned int cmd)
2908 {
2909         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2910                 return false;
2911         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2912 }
2913
2914 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2915                                          struct v4l2_fh *vfh, unsigned int cmd,
2916                                          void *arg)
2917 {
2918         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2919                 return vdev->lock;
2920         if (vfh && vfh->m2m_ctx &&
2921             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2922                 if (vfh->m2m_ctx->q_lock)
2923                         return vfh->m2m_ctx->q_lock;
2924         }
2925         if (vdev->queue && vdev->queue->lock &&
2926                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2927                 return vdev->queue->lock;
2928         return vdev->lock;
2929 }
2930
2931 /* Common ioctl debug function. This function can be used by
2932    external ioctl messages as well as internal V4L ioctl */
2933 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2934 {
2935         const char *dir, *type;
2936
2937         if (prefix)
2938                 printk(KERN_DEBUG "%s: ", prefix);
2939
2940         switch (_IOC_TYPE(cmd)) {
2941         case 'd':
2942                 type = "v4l2_int";
2943                 break;
2944         case 'V':
2945                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2946                         type = "v4l2";
2947                         break;
2948                 }
2949                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2950                 return;
2951         default:
2952                 type = "unknown";
2953                 break;
2954         }
2955
2956         switch (_IOC_DIR(cmd)) {
2957         case _IOC_NONE:              dir = "--"; break;
2958         case _IOC_READ:              dir = "r-"; break;
2959         case _IOC_WRITE:             dir = "-w"; break;
2960         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2961         default:                     dir = "*ERR*"; break;
2962         }
2963         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2964                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2965 }
2966 EXPORT_SYMBOL(v4l_printk_ioctl);
2967
2968 static long __video_do_ioctl(struct file *file,
2969                 unsigned int cmd, void *arg)
2970 {
2971         struct video_device *vfd = video_devdata(file);
2972         struct mutex *req_queue_lock = NULL;
2973         struct mutex *lock; /* ioctl serialization mutex */
2974         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2975         bool write_only = false;
2976         struct v4l2_ioctl_info default_info;
2977         const struct v4l2_ioctl_info *info;
2978         void *fh = file->private_data;
2979         struct v4l2_fh *vfh = NULL;
2980         int dev_debug = vfd->dev_debug;
2981         long ret = -ENOTTY;
2982
2983         if (ops == NULL) {
2984                 pr_warn("%s: has no ioctl_ops.\n",
2985                                 video_device_node_name(vfd));
2986                 return ret;
2987         }
2988
2989         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2990                 vfh = file->private_data;
2991
2992         /*
2993          * We need to serialize streamon/off with queueing new requests.
2994          * These ioctls may trigger the cancellation of a streaming
2995          * operation, and that should not be mixed with queueing a new
2996          * request at the same time.
2997          */
2998         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2999             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
3000                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
3001
3002                 if (mutex_lock_interruptible(req_queue_lock))
3003                         return -ERESTARTSYS;
3004         }
3005
3006         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
3007
3008         if (lock && mutex_lock_interruptible(lock)) {
3009                 if (req_queue_lock)
3010                         mutex_unlock(req_queue_lock);
3011                 return -ERESTARTSYS;
3012         }
3013
3014         if (!video_is_registered(vfd)) {
3015                 ret = -ENODEV;
3016                 goto unlock;
3017         }
3018
3019         if (v4l2_is_known_ioctl(cmd)) {
3020                 info = &v4l2_ioctls[_IOC_NR(cmd)];
3021
3022                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
3023                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3024                         goto done;
3025
3026                 if (vfh && (info->flags & INFO_FL_PRIO)) {
3027                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
3028                         if (ret)
3029                                 goto done;
3030                 }
3031         } else {
3032                 default_info.ioctl = cmd;
3033                 default_info.flags = 0;
3034                 default_info.debug = v4l_print_default;
3035                 info = &default_info;
3036         }
3037
3038         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3039         if (info != &default_info) {
3040                 ret = info->func(ops, file, fh, arg);
3041         } else if (!ops->vidioc_default) {
3042                 ret = -ENOTTY;
3043         } else {
3044                 ret = ops->vidioc_default(file, fh,
3045                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3046                         cmd, arg);
3047         }
3048
3049 done:
3050         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3051                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3052                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3053                         goto unlock;
3054
3055                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3056                 if (ret < 0)
3057                         pr_cont(": error %ld", ret);
3058                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3059                         pr_cont("\n");
3060                 else if (_IOC_DIR(cmd) == _IOC_NONE)
3061                         info->debug(arg, write_only);
3062                 else {
3063                         pr_cont(": ");
3064                         info->debug(arg, write_only);
3065                 }
3066         }
3067
3068 unlock:
3069         if (lock)
3070                 mutex_unlock(lock);
3071         if (req_queue_lock)
3072                 mutex_unlock(req_queue_lock);
3073         return ret;
3074 }
3075
3076 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3077                             void __user **user_ptr, void ***kernel_ptr)
3078 {
3079         int ret = 0;
3080
3081         switch (cmd) {
3082         case VIDIOC_PREPARE_BUF:
3083         case VIDIOC_QUERYBUF:
3084         case VIDIOC_QBUF:
3085         case VIDIOC_DQBUF: {
3086                 struct v4l2_buffer *buf = parg;
3087
3088                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3089                         if (buf->length > VIDEO_MAX_PLANES) {
3090                                 ret = -EINVAL;
3091                                 break;
3092                         }
3093                         *user_ptr = (void __user *)buf->m.planes;
3094                         *kernel_ptr = (void **)&buf->m.planes;
3095                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3096                         ret = 1;
3097                 }
3098                 break;
3099         }
3100
3101         case VIDIOC_G_EDID:
3102         case VIDIOC_S_EDID: {
3103                 struct v4l2_edid *edid = parg;
3104
3105                 if (edid->blocks) {
3106                         if (edid->blocks > 256) {
3107                                 ret = -EINVAL;
3108                                 break;
3109                         }
3110                         *user_ptr = (void __user *)edid->edid;
3111                         *kernel_ptr = (void **)&edid->edid;
3112                         *array_size = edid->blocks * 128;
3113                         ret = 1;
3114                 }
3115                 break;
3116         }
3117
3118         case VIDIOC_S_EXT_CTRLS:
3119         case VIDIOC_G_EXT_CTRLS:
3120         case VIDIOC_TRY_EXT_CTRLS: {
3121                 struct v4l2_ext_controls *ctrls = parg;
3122
3123                 if (ctrls->count != 0) {
3124                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3125                                 ret = -EINVAL;
3126                                 break;
3127                         }
3128                         *user_ptr = (void __user *)ctrls->controls;
3129                         *kernel_ptr = (void **)&ctrls->controls;
3130                         *array_size = sizeof(struct v4l2_ext_control)
3131                                     * ctrls->count;
3132                         ret = 1;
3133                 }
3134                 break;
3135         }
3136         case VIDIOC_G_FMT:
3137         case VIDIOC_S_FMT:
3138         case VIDIOC_TRY_FMT: {
3139                 struct v4l2_format *fmt = parg;
3140
3141                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3142                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3143                         break;
3144                 if (fmt->fmt.win.clipcount > 2048)
3145                         return -EINVAL;
3146                 if (!fmt->fmt.win.clipcount)
3147                         break;
3148
3149                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3150                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3151                 *array_size = sizeof(struct v4l2_clip)
3152                                 * fmt->fmt.win.clipcount;
3153
3154                 ret = 1;
3155                 break;
3156         }
3157         }
3158
3159         return ret;
3160 }
3161
3162 static unsigned int video_translate_cmd(unsigned int cmd)
3163 {
3164 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3165         switch (cmd) {
3166         case VIDIOC_DQEVENT_TIME32:
3167                 return VIDIOC_DQEVENT;
3168         case VIDIOC_QUERYBUF_TIME32:
3169                 return VIDIOC_QUERYBUF;
3170         case VIDIOC_QBUF_TIME32:
3171                 return VIDIOC_QBUF;
3172         case VIDIOC_DQBUF_TIME32:
3173                 return VIDIOC_DQBUF;
3174         case VIDIOC_PREPARE_BUF_TIME32:
3175                 return VIDIOC_PREPARE_BUF;
3176         }
3177 #endif
3178         if (in_compat_syscall())
3179                 return v4l2_compat_translate_cmd(cmd);
3180
3181         return cmd;
3182 }
3183
3184 static int video_get_user(void __user *arg, void *parg,
3185                           unsigned int real_cmd, unsigned int cmd,
3186                           bool *always_copy)
3187 {
3188         unsigned int n = _IOC_SIZE(real_cmd);
3189         int err = 0;
3190
3191         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3192                 /* read-only ioctl */
3193                 memset(parg, 0, n);
3194                 return 0;
3195         }
3196
3197         /*
3198          * In some cases, only a few fields are used as input,
3199          * i.e. when the app sets "index" and then the driver
3200          * fills in the rest of the structure for the thing
3201          * with that index.  We only need to copy up the first
3202          * non-input field.
3203          */
3204         if (v4l2_is_known_ioctl(real_cmd)) {
3205                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3206
3207                 if (flags & INFO_FL_CLEAR_MASK)
3208                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3209                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3210         }
3211
3212         if (cmd == real_cmd) {
3213                 if (copy_from_user(parg, (void __user *)arg, n))
3214                         err = -EFAULT;
3215         } else if (in_compat_syscall()) {
3216                 memset(parg, 0, n);
3217                 err = v4l2_compat_get_user(arg, parg, cmd);
3218         } else {
3219                 memset(parg, 0, n);
3220 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3221                 switch (cmd) {
3222                 case VIDIOC_QUERYBUF_TIME32:
3223                 case VIDIOC_QBUF_TIME32:
3224                 case VIDIOC_DQBUF_TIME32:
3225                 case VIDIOC_PREPARE_BUF_TIME32: {
3226                         struct v4l2_buffer_time32 vb32;
3227                         struct v4l2_buffer *vb = parg;
3228
3229                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3230                                 return -EFAULT;
3231
3232                         *vb = (struct v4l2_buffer) {
3233                                 .index          = vb32.index,
3234                                 .type           = vb32.type,
3235                                 .bytesused      = vb32.bytesused,
3236                                 .flags          = vb32.flags,
3237                                 .field          = vb32.field,
3238                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3239                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3240                                 .timecode       = vb32.timecode,
3241                                 .sequence       = vb32.sequence,
3242                                 .memory         = vb32.memory,
3243                                 .m.userptr      = vb32.m.userptr,
3244                                 .length         = vb32.length,
3245                                 .request_fd     = vb32.request_fd,
3246                         };
3247                         break;
3248                 }
3249                 }
3250 #endif
3251         }
3252
3253         /* zero out anything we don't copy from userspace */
3254         if (!err && n < _IOC_SIZE(real_cmd))
3255                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3256         return err;
3257 }
3258
3259 static int video_put_user(void __user *arg, void *parg,
3260                           unsigned int real_cmd, unsigned int cmd)
3261 {
3262         if (!(_IOC_DIR(cmd) & _IOC_READ))
3263                 return 0;
3264
3265         if (cmd == real_cmd) {
3266                 /*  Copy results into user buffer  */
3267                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3268                         return -EFAULT;
3269                 return 0;
3270         }
3271
3272         if (in_compat_syscall())
3273                 return v4l2_compat_put_user(arg, parg, cmd);
3274
3275 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3276         switch (cmd) {
3277         case VIDIOC_DQEVENT_TIME32: {
3278                 struct v4l2_event *ev = parg;
3279                 struct v4l2_event_time32 ev32;
3280
3281                 memset(&ev32, 0, sizeof(ev32));
3282
3283                 ev32.type       = ev->type;
3284                 ev32.pending    = ev->pending;
3285                 ev32.sequence   = ev->sequence;
3286                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3287                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3288                 ev32.id         = ev->id;
3289
3290                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3291                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3292
3293                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3294                         return -EFAULT;
3295                 break;
3296         }
3297         case VIDIOC_QUERYBUF_TIME32:
3298         case VIDIOC_QBUF_TIME32:
3299         case VIDIOC_DQBUF_TIME32:
3300         case VIDIOC_PREPARE_BUF_TIME32: {
3301                 struct v4l2_buffer *vb = parg;
3302                 struct v4l2_buffer_time32 vb32;
3303
3304                 memset(&vb32, 0, sizeof(vb32));
3305
3306                 vb32.index      = vb->index;
3307                 vb32.type       = vb->type;
3308                 vb32.bytesused  = vb->bytesused;
3309                 vb32.flags      = vb->flags;
3310                 vb32.field      = vb->field;
3311                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3312                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3313                 vb32.timecode   = vb->timecode;
3314                 vb32.sequence   = vb->sequence;
3315                 vb32.memory     = vb->memory;
3316                 vb32.m.userptr  = vb->m.userptr;
3317                 vb32.length     = vb->length;
3318                 vb32.request_fd = vb->request_fd;
3319
3320                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3321                         return -EFAULT;
3322                 break;
3323         }
3324         }
3325 #endif
3326
3327         return 0;
3328 }
3329
3330 long
3331 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3332                v4l2_kioctl func)
3333 {
3334         char    sbuf[128];
3335         void    *mbuf = NULL, *array_buf = NULL;
3336         void    *parg = (void *)arg;
3337         long    err  = -EINVAL;
3338         bool    has_array_args;
3339         bool    always_copy = false;
3340         size_t  array_size = 0;
3341         void __user *user_ptr = NULL;
3342         void    **kernel_ptr = NULL;
3343         unsigned int cmd = video_translate_cmd(orig_cmd);
3344         const size_t ioc_size = _IOC_SIZE(cmd);
3345
3346         /*  Copy arguments into temp kernel buffer  */
3347         if (_IOC_DIR(cmd) != _IOC_NONE) {
3348                 if (ioc_size <= sizeof(sbuf)) {
3349                         parg = sbuf;
3350                 } else {
3351                         /* too big to allocate from stack */
3352                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3353                         if (NULL == mbuf)
3354                                 return -ENOMEM;
3355                         parg = mbuf;
3356                 }
3357
3358                 err = video_get_user((void __user *)arg, parg, cmd,
3359                                      orig_cmd, &always_copy);
3360                 if (err)
3361                         goto out;
3362         }
3363
3364         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3365         if (err < 0)
3366                 goto out;
3367         has_array_args = err;
3368
3369         if (has_array_args) {
3370                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3371                 err = -ENOMEM;
3372                 if (array_buf == NULL)
3373                         goto out;
3374                 if (in_compat_syscall())
3375                         err = v4l2_compat_get_array_args(file, array_buf,
3376                                                          user_ptr, array_size,
3377                                                          orig_cmd, parg);
3378                 else
3379                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3380                                                                 -EFAULT : 0;
3381                 if (err)
3382                         goto out;
3383                 *kernel_ptr = array_buf;
3384         }
3385
3386         /* Handles IOCTL */
3387         err = func(file, cmd, parg);
3388         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3389                 err = -ENOTTY;
3390                 goto out;
3391         }
3392
3393         if (err == 0) {
3394                 if (cmd == VIDIOC_DQBUF)
3395                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3396                 else if (cmd == VIDIOC_QBUF)
3397                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3398         }
3399
3400         /*
3401          * Some ioctls can return an error, but still have valid
3402          * results that must be returned.
3403          */
3404         if (err < 0 && !always_copy)
3405                 goto out;
3406
3407         if (has_array_args) {
3408                 *kernel_ptr = (void __force *)user_ptr;
3409                 if (in_compat_syscall()) {
3410                         int put_err;
3411
3412                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3413                                                              array_buf,
3414                                                              array_size,
3415                                                              orig_cmd, parg);
3416                         if (put_err)
3417                                 err = put_err;
3418                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3419                         err = -EFAULT;
3420                 }
3421         }
3422
3423         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3424                 err = -EFAULT;
3425 out:
3426         kvfree(array_buf);
3427         kfree(mbuf);
3428         return err;
3429 }
3430
3431 long video_ioctl2(struct file *file,
3432                unsigned int cmd, unsigned long arg)
3433 {
3434         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3435 }
3436 EXPORT_SYMBOL(video_ioctl2);