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, <[email protected]> (version 1)
   8  *              Mauro Carvalho Chehab <[email protected]> (version 2)
   9  */
  10
  11 #include <linux/compat.h>
  12 #include <linux/mm.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/kernel.h>
  17 #include <linux/version.h>
  18
  19 #include <linux/videodev2.h>
  20
  21 #include <media/v4l2-common.h>
  22 #include <media/v4l2-ioctl.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-fh.h>
  25 #include <media/v4l2-event.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/videobuf2-v4l2.h>
  28 #include <media/v4l2-mc.h>
  29 #include <media/v4l2-mem2mem.h>
  30
  31 #include <trace/events/v4l2.h>
  32
  33 /* Zero out the end of the struct pointed to by p.  Everything after, but
  34  * not including, the specified field is cleared. */
  35 #define CLEAR_AFTER_FIELD(p, field) \
  36         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  37         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  38
  39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  40
  41 struct std_descr {
  42         v4l2_std_id std;
  43         const char *descr;
  44 };
  45
  46 static const struct std_descr standards[] = {
  47         { V4L2_STD_NTSC,        "NTSC"      },
  48         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  49         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  50         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  51         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  52         { V4L2_STD_PAL,         "PAL"       },
  53         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  54         { V4L2_STD_PAL_B,       "PAL-B"     },
  55         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  56         { V4L2_STD_PAL_G,       "PAL-G"     },
  57         { V4L2_STD_PAL_H,       "PAL-H"     },
  58         { V4L2_STD_PAL_I,       "PAL-I"     },
  59         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  60         { V4L2_STD_PAL_D,       "PAL-D"     },
  61         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  62         { V4L2_STD_PAL_K,       "PAL-K"     },
  63         { V4L2_STD_PAL_M,       "PAL-M"     },
  64         { V4L2_STD_PAL_N,       "PAL-N"     },
  65         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  66         { V4L2_STD_PAL_60,      "PAL-60"    },
  67         { V4L2_STD_SECAM,       "SECAM"     },
  68         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  69         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  70         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  71         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  72         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  73         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  74         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  75         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  76         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  77         { 0,                    "Unknown"   }
  78 };
  79
  80 /* video4linux standard ID conversion to standard name
  81  */
  82 const char *v4l2_norm_to_name(v4l2_std_id id)
  83 {
  84         u32 myid = id;
  85         int i;
  86
  87         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  88            64 bit comparisons. So, on that architecture, with some gcc
  89            variants, compilation fails. Currently, the max value is 30bit wide.
  90          */
  91         BUG_ON(myid != id);
  92
  93         for (i = 0; standards[i].std; i++)
  94                 if (myid == standards[i].std)
  95                         break;
  96         return standards[i].descr;
  97 }
  98 EXPORT_SYMBOL(v4l2_norm_to_name);
  99
 100 /* Returns frame period for the given standard */
 101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 102 {
 103         if (id & V4L2_STD_525_60) {
 104                 frameperiod->numerator = 1001;
 105                 frameperiod->denominator = 30000;
 106         } else {
 107                 frameperiod->numerator = 1;
 108                 frameperiod->denominator = 25;
 109         }
 110 }
 111 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 112
 113 /* Fill in the fields of a v4l2_standard structure according to the
 114    'id' and 'transmission' parameters.  Returns negative on error.  */
 115 int v4l2_video_std_construct(struct v4l2_standard *vs,
 116                              int id, const char *name)
 117 {
 118         vs->id = id;
 119         v4l2_video_std_frame_period(id, &vs->frameperiod);
 120         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 121         strscpy(vs->name, name, sizeof(vs->name));
 122         return 0;
 123 }
 124 EXPORT_SYMBOL(v4l2_video_std_construct);
 125
 126 /* Fill in the fields of a v4l2_standard structure according to the
 127  * 'id' and 'vs->index' parameters. Returns negative on error. */
 128 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 129 {
 130         v4l2_std_id curr_id = 0;
 131         unsigned int index = vs->index, i, j = 0;
 132         const char *descr = "";
 133
 134         /* Return -ENODATA if the id for the current input
 135            or output is 0, meaning that it doesn't support this API. */
 136         if (id == 0)
 137                 return -ENODATA;
 138
 139         /* Return norm array in a canonical way */
 140         for (i = 0; i <= index && id; i++) {
 141                 /* last std value in the standards array is 0, so this
 142                    while always ends there since (id & 0) == 0. */
 143                 while ((id & standards[j].std) != standards[j].std)
 144                         j++;
 145                 curr_id = standards[j].std;
 146                 descr = standards[j].descr;
 147                 j++;
 148                 if (curr_id == 0)
 149                         break;
 150                 if (curr_id != V4L2_STD_PAL &&
 151                                 curr_id != V4L2_STD_SECAM &&
 152                                 curr_id != V4L2_STD_NTSC)
 153                         id &= ~curr_id;
 154         }
 155         if (i <= index)
 156                 return -EINVAL;
 157
 158         v4l2_video_std_construct(vs, curr_id, descr);
 159         return 0;
 160 }
 161
 162 /* ----------------------------------------------------------------- */
 163 /* some arrays for pretty-printing debug messages of enum types      */
 164
 165 const char *v4l2_field_names[] = {
 166         [V4L2_FIELD_ANY]        = "any",
 167         [V4L2_FIELD_NONE]       = "none",
 168         [V4L2_FIELD_TOP]        = "top",
 169         [V4L2_FIELD_BOTTOM]     = "bottom",
 170         [V4L2_FIELD_INTERLACED] = "interlaced",
 171         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 172         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 173         [V4L2_FIELD_ALTERNATE]  = "alternate",
 174         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 175         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 176 };
 177 EXPORT_SYMBOL(v4l2_field_names);
 178
 179 const char *v4l2_type_names[] = {
 180         [0]                                = "0",
 181         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 182         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 183         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 184         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 185         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 186         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 187         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 188         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 189         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 190         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 191         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 192         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 193         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 194         [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 195 };
 196 EXPORT_SYMBOL(v4l2_type_names);
 197
 198 static const char *v4l2_memory_names[] = {
 199         [V4L2_MEMORY_MMAP]    = "mmap",
 200         [V4L2_MEMORY_USERPTR] = "userptr",
 201         [V4L2_MEMORY_OVERLAY] = "overlay",
 202         [V4L2_MEMORY_DMABUF] = "dmabuf",
 203 };
 204
 205 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 206
 207 /* ------------------------------------------------------------------ */
 208 /* debug help functions                                               */
 209
 210 static void v4l_print_querycap(const void *arg, bool write_only)
 211 {
 212         const struct v4l2_capability *p = arg;
 213
 214         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 215                 (int)sizeof(p->driver), p->driver,
 216                 (int)sizeof(p->card), p->card,
 217                 (int)sizeof(p->bus_info), p->bus_info,
 218                 p->version, p->capabilities, p->device_caps);
 219 }
 220
 221 static void v4l_print_enuminput(const void *arg, bool write_only)
 222 {
 223         const struct v4l2_input *p = arg;
 224
 225         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 226                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 227                 p->tuner, (unsigned long long)p->std, p->status,
 228                 p->capabilities);
 229 }
 230
 231 static void v4l_print_enumoutput(const void *arg, bool write_only)
 232 {
 233         const struct v4l2_output *p = arg;
 234
 235         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 236                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 237                 p->modulator, (unsigned long long)p->std, p->capabilities);
 238 }
 239
 240 static void v4l_print_audio(const void *arg, bool write_only)
 241 {
 242         const struct v4l2_audio *p = arg;
 243
 244         if (write_only)
 245                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 246         else
 247                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 248                         p->index, (int)sizeof(p->name), p->name,
 249                         p->capability, p->mode);
 250 }
 251
 252 static void v4l_print_audioout(const void *arg, bool write_only)
 253 {
 254         const struct v4l2_audioout *p = arg;
 255
 256         if (write_only)
 257                 pr_cont("index=%u\n", p->index);
 258         else
 259                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 260                         p->index, (int)sizeof(p->name), p->name,
 261                         p->capability, p->mode);
 262 }
 263
 264 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 265 {
 266         const struct v4l2_fmtdesc *p = arg;
 267
 268         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 269                 p->index, prt_names(p->type, v4l2_type_names),
 270                 p->flags, &p->pixelformat, p->mbus_code,
 271                 (int)sizeof(p->description), p->description);
 272 }
 273
 274 static void v4l_print_format(const void *arg, bool write_only)
 275 {
 276         const struct v4l2_format *p = arg;
 277         const struct v4l2_pix_format *pix;
 278         const struct v4l2_pix_format_mplane *mp;
 279         const struct v4l2_vbi_format *vbi;
 280         const struct v4l2_sliced_vbi_format *sliced;
 281         const struct v4l2_window *win;
 282         const struct v4l2_sdr_format *sdr;
 283         const struct v4l2_meta_format *meta;
 284         u32 planes;
 285         unsigned i;
 286
 287         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 288         switch (p->type) {
 289         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 290         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 291                 pix = &p->fmt.pix;
 292                 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 293                         pix->width, pix->height, &pix->pixelformat,
 294                         prt_names(pix->field, v4l2_field_names),
 295                         pix->bytesperline, pix->sizeimage,
 296                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 297                         pix->quantization, pix->xfer_func);
 298                 break;
 299         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 300         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 301                 mp = &p->fmt.pix_mp;
 302                 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 303                         mp->width, mp->height, &mp->pixelformat,
 304                         prt_names(mp->field, v4l2_field_names),
 305                         mp->colorspace, mp->num_planes, mp->flags,
 306                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 307                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 308                 for (i = 0; i < planes; i++)
 309                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 310                                         mp->plane_fmt[i].bytesperline,
 311                                         mp->plane_fmt[i].sizeimage);
 312                 break;
 313         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 314         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 315                 win = &p->fmt.win;
 316                 /* Note: we can't print the clip list here since the clips
 317                  * pointer is a userspace pointer, not a kernelspace
 318                  * pointer. */
 319                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
 320                         win->w.width, win->w.height, win->w.left, win->w.top,
 321                         prt_names(win->field, v4l2_field_names),
 322                         win->chromakey, win->clipcount, win->clips,
 323                         win->bitmap, win->global_alpha);
 324                 break;
 325         case V4L2_BUF_TYPE_VBI_CAPTURE:
 326         case V4L2_BUF_TYPE_VBI_OUTPUT:
 327                 vbi = &p->fmt.vbi;
 328                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 329                         vbi->sampling_rate, vbi->offset,
 330                         vbi->samples_per_line, &vbi->sample_format,
 331                         vbi->start[0], vbi->start[1],
 332                         vbi->count[0], vbi->count[1]);
 333                 break;
 334         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 335         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 336                 sliced = &p->fmt.sliced;
 337                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 338                                 sliced->service_set, sliced->io_size);
 339                 for (i = 0; i < 24; i++)
 340                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 341                                 sliced->service_lines[0][i],
 342                                 sliced->service_lines[1][i]);
 343                 break;
 344         case V4L2_BUF_TYPE_SDR_CAPTURE:
 345         case V4L2_BUF_TYPE_SDR_OUTPUT:
 346                 sdr = &p->fmt.sdr;
 347                 pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat);
 348                 break;
 349         case V4L2_BUF_TYPE_META_CAPTURE:
 350         case V4L2_BUF_TYPE_META_OUTPUT:
 351                 meta = &p->fmt.meta;
 352                 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 353                         &meta->dataformat, meta->buffersize);
 354                 break;
 355         }
 356 }
 357
 358 static void v4l_print_framebuffer(const void *arg, bool write_only)
 359 {
 360         const struct v4l2_framebuffer *p = arg;
 361
 362         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 363                 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 364                 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 365                 p->fmt.colorspace);
 366 }
 367
 368 static void v4l_print_buftype(const void *arg, bool write_only)
 369 {
 370         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 371 }
 372
 373 static void v4l_print_modulator(const void *arg, bool write_only)
 374 {
 375         const struct v4l2_modulator *p = arg;
 376
 377         if (write_only)
 378                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 379         else
 380                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 381                         p->index, (int)sizeof(p->name), p->name, p->capability,
 382                         p->rangelow, p->rangehigh, p->txsubchans);
 383 }
 384
 385 static void v4l_print_tuner(const void *arg, bool write_only)
 386 {
 387         const struct v4l2_tuner *p = arg;
 388
 389         if (write_only)
 390                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 391         else
 392                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 393                         p->index, (int)sizeof(p->name), p->name, p->type,
 394                         p->capability, p->rangelow,
 395                         p->rangehigh, p->signal, p->afc,
 396                         p->rxsubchans, p->audmode);
 397 }
 398
 399 static void v4l_print_frequency(const void *arg, bool write_only)
 400 {
 401         const struct v4l2_frequency *p = arg;
 402
 403         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 404                                 p->tuner, p->type, p->frequency);
 405 }
 406
 407 static void v4l_print_standard(const void *arg, bool write_only)
 408 {
 409         const struct v4l2_standard *p = arg;
 410
 411         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 412                 p->index,
 413                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 414                 p->frameperiod.numerator,
 415                 p->frameperiod.denominator,
 416                 p->framelines);
 417 }
 418
 419 static void v4l_print_std(const void *arg, bool write_only)
 420 {
 421         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 422 }
 423
 424 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 425 {
 426         const struct v4l2_hw_freq_seek *p = arg;
 427
 428         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 429                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 430                 p->rangelow, p->rangehigh);
 431 }
 432
 433 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 434 {
 435         const struct v4l2_requestbuffers *p = arg;
 436
 437         pr_cont("count=%d, type=%s, memory=%s\n",
 438                 p->count,
 439                 prt_names(p->type, v4l2_type_names),
 440                 prt_names(p->memory, v4l2_memory_names));
 441 }
 442
 443 static void v4l_print_buffer(const void *arg, bool write_only)
 444 {
 445         const struct v4l2_buffer *p = arg;
 446         const struct v4l2_timecode *tc = &p->timecode;
 447         const struct v4l2_plane *plane;
 448         int i;
 449
 450         pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 451                         (int)p->timestamp.tv_sec / 3600,
 452                         ((int)p->timestamp.tv_sec / 60) % 60,
 453                         ((int)p->timestamp.tv_sec % 60),
 454                         (long)p->timestamp.tv_usec,
 455                         p->index,
 456                         prt_names(p->type, v4l2_type_names), p->request_fd,
 457                         p->flags, prt_names(p->field, v4l2_field_names),
 458                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 459
 460         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 461                 pr_cont("\n");
 462                 for (i = 0; i < p->length; ++i) {
 463                         plane = &p->m.planes[i];
 464                         printk(KERN_DEBUG
 465                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 466                                 i, plane->bytesused, plane->data_offset,
 467                                 plane->m.userptr, plane->length);
 468                 }
 469         } else {
 470                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 471                         p->bytesused, p->m.userptr, p->length);
 472         }
 473
 474         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 475                         tc->hours, tc->minutes, tc->seconds,
 476                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 477 }
 478
 479 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 480 {
 481         const struct v4l2_exportbuffer *p = arg;
 482
 483         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 484                 p->fd, prt_names(p->type, v4l2_type_names),
 485                 p->index, p->plane, p->flags);
 486 }
 487
 488 static void v4l_print_create_buffers(const void *arg, bool write_only)
 489 {
 490         const struct v4l2_create_buffers *p = arg;
 491
 492         pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 493                 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 494                 p->capabilities);
 495         v4l_print_format(&p->format, write_only);
 496 }
 497
 498 static void v4l_print_streamparm(const void *arg, bool write_only)
 499 {
 500         const struct v4l2_streamparm *p = arg;
 501
 502         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 503
 504         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 505             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 506                 const struct v4l2_captureparm *c = &p->parm.capture;
 507
 508                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 509                         c->capability, c->capturemode,
 510                         c->timeperframe.numerator, c->timeperframe.denominator,
 511                         c->extendedmode, c->readbuffers);
 512         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 513                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 514                 const struct v4l2_outputparm *c = &p->parm.output;
 515
 516                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 517                         c->capability, c->outputmode,
 518                         c->timeperframe.numerator, c->timeperframe.denominator,
 519                         c->extendedmode, c->writebuffers);
 520         } else {
 521                 pr_cont("\n");
 522         }
 523 }
 524
 525 static void v4l_print_queryctrl(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_queryctrl *p = arg;
 528
 529         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 530                         p->id, p->type, (int)sizeof(p->name), p->name,
 531                         p->minimum, p->maximum,
 532                         p->step, p->default_value, p->flags);
 533 }
 534
 535 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 536 {
 537         const struct v4l2_query_ext_ctrl *p = arg;
 538
 539         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 540                         p->id, p->type, (int)sizeof(p->name), p->name,
 541                         p->minimum, p->maximum,
 542                         p->step, p->default_value, p->flags,
 543                         p->elem_size, p->elems, p->nr_of_dims,
 544                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 545 }
 546
 547 static void v4l_print_querymenu(const void *arg, bool write_only)
 548 {
 549         const struct v4l2_querymenu *p = arg;
 550
 551         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 552 }
 553
 554 static void v4l_print_control(const void *arg, bool write_only)
 555 {
 556         const struct v4l2_control *p = arg;
 557         const char *name = v4l2_ctrl_get_name(p->id);
 558
 559         if (name)
 560                 pr_cont("name=%s, ", name);
 561         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 562 }
 563
 564 static void v4l_print_ext_controls(const void *arg, bool write_only)
 565 {
 566         const struct v4l2_ext_controls *p = arg;
 567         int i;
 568
 569         pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 570                         p->which, p->count, p->error_idx, p->request_fd);
 571         for (i = 0; i < p->count; i++) {
 572                 unsigned int id = p->controls[i].id;
 573                 const char *name = v4l2_ctrl_get_name(id);
 574
 575                 if (name)
 576                         pr_cont(", name=%s", name);
 577                 if (!p->controls[i].size)
 578                         pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 579                 else
 580                         pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 581         }
 582         pr_cont("\n");
 583 }
 584
 585 static void v4l_print_cropcap(const void *arg, bool write_only)
 586 {
 587         const struct v4l2_cropcap *p = arg;
 588
 589         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 590                 prt_names(p->type, v4l2_type_names),
 591                 p->bounds.width, p->bounds.height,
 592                 p->bounds.left, p->bounds.top,
 593                 p->defrect.width, p->defrect.height,
 594                 p->defrect.left, p->defrect.top,
 595                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 596 }
 597
 598 static void v4l_print_crop(const void *arg, bool write_only)
 599 {
 600         const struct v4l2_crop *p = arg;
 601
 602         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 603                 prt_names(p->type, v4l2_type_names),
 604                 p->c.width, p->c.height,
 605                 p->c.left, p->c.top);
 606 }
 607
 608 static void v4l_print_selection(const void *arg, bool write_only)
 609 {
 610         const struct v4l2_selection *p = arg;
 611
 612         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 613                 prt_names(p->type, v4l2_type_names),
 614                 p->target, p->flags,
 615                 p->r.width, p->r.height, p->r.left, p->r.top);
 616 }
 617
 618 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 619 {
 620         const struct v4l2_jpegcompression *p = arg;
 621
 622         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 623                 p->quality, p->APPn, p->APP_len,
 624                 p->COM_len, p->jpeg_markers);
 625 }
 626
 627 static void v4l_print_enc_idx(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_enc_idx *p = arg;
 630
 631         pr_cont("entries=%d, entries_cap=%d\n",
 632                         p->entries, p->entries_cap);
 633 }
 634
 635 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 636 {
 637         const struct v4l2_encoder_cmd *p = arg;
 638
 639         pr_cont("cmd=%d, flags=0x%x\n",
 640                         p->cmd, p->flags);
 641 }
 642
 643 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 644 {
 645         const struct v4l2_decoder_cmd *p = arg;
 646
 647         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 648
 649         if (p->cmd == V4L2_DEC_CMD_START)
 650                 pr_info("speed=%d, format=%u\n",
 651                                 p->start.speed, p->start.format);
 652         else if (p->cmd == V4L2_DEC_CMD_STOP)
 653                 pr_info("pts=%llu\n", p->stop.pts);
 654 }
 655
 656 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 657 {
 658         const struct v4l2_dbg_chip_info *p = arg;
 659
 660         pr_cont("type=%u, ", p->match.type);
 661         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 662                 pr_cont("name=%.*s, ",
 663                                 (int)sizeof(p->match.name), p->match.name);
 664         else
 665                 pr_cont("addr=%u, ", p->match.addr);
 666         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 667 }
 668
 669 static void v4l_print_dbg_register(const void *arg, bool write_only)
 670 {
 671         const struct v4l2_dbg_register *p = arg;
 672
 673         pr_cont("type=%u, ", p->match.type);
 674         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 675                 pr_cont("name=%.*s, ",
 676                                 (int)sizeof(p->match.name), p->match.name);
 677         else
 678                 pr_cont("addr=%u, ", p->match.addr);
 679         pr_cont("reg=0x%llx, val=0x%llx\n",
 680                         p->reg, p->val);
 681 }
 682
 683 static void v4l_print_dv_timings(const void *arg, bool write_only)
 684 {
 685         const struct v4l2_dv_timings *p = arg;
 686
 687         switch (p->type) {
 688         case V4L2_DV_BT_656_1120:
 689                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 690                                 p->bt.interlaced, p->bt.pixelclock,
 691                                 p->bt.width, p->bt.height,
 692                                 p->bt.polarities, p->bt.hfrontporch,
 693                                 p->bt.hsync, p->bt.hbackporch,
 694                                 p->bt.vfrontporch, p->bt.vsync,
 695                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 696                                 p->bt.il_vsync, p->bt.il_vbackporch,
 697                                 p->bt.standards, p->bt.flags);
 698                 break;
 699         default:
 700                 pr_cont("type=%d\n", p->type);
 701                 break;
 702         }
 703 }
 704
 705 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 706 {
 707         const struct v4l2_enum_dv_timings *p = arg;
 708
 709         pr_cont("index=%u, ", p->index);
 710         v4l_print_dv_timings(&p->timings, write_only);
 711 }
 712
 713 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 714 {
 715         const struct v4l2_dv_timings_cap *p = arg;
 716
 717         switch (p->type) {
 718         case V4L2_DV_BT_656_1120:
 719                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 720                         p->bt.min_width, p->bt.max_width,
 721                         p->bt.min_height, p->bt.max_height,
 722                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 723                         p->bt.standards, p->bt.capabilities);
 724                 break;
 725         default:
 726                 pr_cont("type=%u\n", p->type);
 727                 break;
 728         }
 729 }
 730
 731 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 732 {
 733         const struct v4l2_frmsizeenum *p = arg;
 734
 735         pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 736                 p->index, &p->pixel_format, p->type);
 737         switch (p->type) {
 738         case V4L2_FRMSIZE_TYPE_DISCRETE:
 739                 pr_cont(", wxh=%ux%u\n",
 740                         p->discrete.width, p->discrete.height);
 741                 break;
 742         case V4L2_FRMSIZE_TYPE_STEPWISE:
 743                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 744                                 p->stepwise.min_width,
 745                                 p->stepwise.min_height,
 746                                 p->stepwise.max_width,
 747                                 p->stepwise.max_height,
 748                                 p->stepwise.step_width,
 749                                 p->stepwise.step_height);
 750                 break;
 751         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 752         default:
 753                 pr_cont("\n");
 754                 break;
 755         }
 756 }
 757
 758 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 759 {
 760         const struct v4l2_frmivalenum *p = arg;
 761
 762         pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 763                 p->index, &p->pixel_format, p->width, p->height, p->type);
 764         switch (p->type) {
 765         case V4L2_FRMIVAL_TYPE_DISCRETE:
 766                 pr_cont(", fps=%d/%d\n",
 767                                 p->discrete.numerator,
 768                                 p->discrete.denominator);
 769                 break;
 770         case V4L2_FRMIVAL_TYPE_STEPWISE:
 771                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 772                                 p->stepwise.min.numerator,
 773                                 p->stepwise.min.denominator,
 774                                 p->stepwise.max.numerator,
 775                                 p->stepwise.max.denominator,
 776                                 p->stepwise.step.numerator,
 777                                 p->stepwise.step.denominator);
 778                 break;
 779         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 780         default:
 781                 pr_cont("\n");
 782                 break;
 783         }
 784 }
 785
 786 static void v4l_print_event(const void *arg, bool write_only)
 787 {
 788         const struct v4l2_event *p = arg;
 789         const struct v4l2_event_ctrl *c;
 790
 791         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 792                         p->type, p->pending, p->sequence, p->id,
 793                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 794         switch (p->type) {
 795         case V4L2_EVENT_VSYNC:
 796                 printk(KERN_DEBUG "field=%s\n",
 797                         prt_names(p->u.vsync.field, v4l2_field_names));
 798                 break;
 799         case V4L2_EVENT_CTRL:
 800                 c = &p->u.ctrl;
 801                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 802                         c->changes, c->type);
 803                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 804                         pr_cont("value64=%lld, ", c->value64);
 805                 else
 806                         pr_cont("value=%d, ", c->value);
 807                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 808                         c->flags, c->minimum, c->maximum,
 809                         c->step, c->default_value);
 810                 break;
 811         case V4L2_EVENT_FRAME_SYNC:
 812                 pr_cont("frame_sequence=%u\n",
 813                         p->u.frame_sync.frame_sequence);
 814                 break;
 815         }
 816 }
 817
 818 static void v4l_print_event_subscription(const void *arg, bool write_only)
 819 {
 820         const struct v4l2_event_subscription *p = arg;
 821
 822         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 823                         p->type, p->id, p->flags);
 824 }
 825
 826 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 827 {
 828         const struct v4l2_sliced_vbi_cap *p = arg;
 829         int i;
 830
 831         pr_cont("type=%s, service_set=0x%08x\n",
 832                         prt_names(p->type, v4l2_type_names), p->service_set);
 833         for (i = 0; i < 24; i++)
 834                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 835                                 p->service_lines[0][i],
 836                                 p->service_lines[1][i]);
 837 }
 838
 839 static void v4l_print_freq_band(const void *arg, bool write_only)
 840 {
 841         const struct v4l2_frequency_band *p = arg;
 842
 843         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 844                         p->tuner, p->type, p->index,
 845                         p->capability, p->rangelow,
 846                         p->rangehigh, p->modulation);
 847 }
 848
 849 static void v4l_print_edid(const void *arg, bool write_only)
 850 {
 851         const struct v4l2_edid *p = arg;
 852
 853         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 854                 p->pad, p->start_block, p->blocks);
 855 }
 856
 857 static void v4l_print_u32(const void *arg, bool write_only)
 858 {
 859         pr_cont("value=%u\n", *(const u32 *)arg);
 860 }
 861
 862 static void v4l_print_newline(const void *arg, bool write_only)
 863 {
 864         pr_cont("\n");
 865 }
 866
 867 static void v4l_print_default(const void *arg, bool write_only)
 868 {
 869         pr_cont("driver-specific ioctl\n");
 870 }
 871
 872 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 873 {
 874         __u32 i;
 875
 876         /* zero the reserved fields */
 877         c->reserved[0] = 0;
 878         for (i = 0; i < c->count; i++)
 879                 c->controls[i].reserved2[0] = 0;
 880
 881         switch (c->which) {
 882         case V4L2_CID_PRIVATE_BASE:
 883                 /*
 884                  * V4L2_CID_PRIVATE_BASE cannot be used as control class
 885                  * when using extended controls.
 886                  * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 887                  * is it allowed for backwards compatibility.
 888                  */
 889                 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 890                         return false;
 891                 break;
 892         case V4L2_CTRL_WHICH_DEF_VAL:
 893                 /* Default value cannot be changed */
 894                 if (ioctl == VIDIOC_S_EXT_CTRLS ||
 895                     ioctl == VIDIOC_TRY_EXT_CTRLS) {
 896                         c->error_idx = c->count;
 897                         return false;
 898                 }
 899                 return true;
 900         case V4L2_CTRL_WHICH_CUR_VAL:
 901                 return true;
 902         case V4L2_CTRL_WHICH_REQUEST_VAL:
 903                 c->error_idx = c->count;
 904                 return false;
 905         }
 906
 907         /* Check that all controls are from the same control class. */
 908         for (i = 0; i < c->count; i++) {
 909                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 910                         c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 911                                                                       c->count;
 912                         return false;
 913                 }
 914         }
 915         return true;
 916 }
 917
 918 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 919 {
 920         const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 921                              V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 922                              V4L2_CAP_VIDEO_OUTPUT |
 923                              V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 924                              V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 925         const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 926                               V4L2_CAP_META_OUTPUT;
 927         struct video_device *vfd = video_devdata(file);
 928         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 929         bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 930                       (vfd->device_caps & vid_caps);
 931         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 932         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 933         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 934         bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 935                        (vfd->device_caps & meta_caps);
 936         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 937         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 938
 939         if (ops == NULL)
 940                 return -EINVAL;
 941
 942         switch (type) {
 943         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 944                 if ((is_vid || is_tch) && is_rx &&
 945                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 946                         return 0;
 947                 break;
 948         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 949                 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 950                         return 0;
 951                 break;
 952         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 953                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 954                         return 0;
 955                 break;
 956         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 957                 if (is_vid && is_tx &&
 958                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 962                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 963                         return 0;
 964                 break;
 965         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 966                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 967                         return 0;
 968                 break;
 969         case V4L2_BUF_TYPE_VBI_CAPTURE:
 970                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 971                         return 0;
 972                 break;
 973         case V4L2_BUF_TYPE_VBI_OUTPUT:
 974                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 975                         return 0;
 976                 break;
 977         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 978                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 979                         return 0;
 980                 break;
 981         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 982                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 983                         return 0;
 984                 break;
 985         case V4L2_BUF_TYPE_SDR_CAPTURE:
 986                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 987                         return 0;
 988                 break;
 989         case V4L2_BUF_TYPE_SDR_OUTPUT:
 990                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 991                         return 0;
 992                 break;
 993         case V4L2_BUF_TYPE_META_CAPTURE:
 994                 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 995                         return 0;
 996                 break;
 997         case V4L2_BUF_TYPE_META_OUTPUT:
 998                 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 999                         return 0;
1000                 break;
1001         default:
1002                 break;
1003         }
1004         return -EINVAL;
1005 }
1006
1007 static void v4l_sanitize_format(struct v4l2_format *fmt)
1008 {
1009         unsigned int offset;
1010
1011         /* Make sure num_planes is not bogus */
1012         if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1013             fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1014                 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1015                                                VIDEO_MAX_PLANES);
1016
1017         /*
1018          * The v4l2_pix_format structure has been extended with fields that were
1019          * not previously required to be set to zero by applications. The priv
1020          * field, when set to a magic value, indicates the the extended fields
1021          * are valid. Otherwise they will contain undefined values. To simplify
1022          * the API towards drivers zero the extended fields and set the priv
1023          * field to the magic value when the extended pixel format structure
1024          * isn't used by applications.
1025          */
1026
1027         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1028             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1029                 return;
1030
1031         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1032                 return;
1033
1034         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1035
1036         offset = offsetof(struct v4l2_pix_format, priv)
1037                + sizeof(fmt->fmt.pix.priv);
1038         memset(((void *)&fmt->fmt.pix) + offset, 0,
1039                sizeof(fmt->fmt.pix) - offset);
1040 }
1041
1042 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1043                                 struct file *file, void *fh, void *arg)
1044 {
1045         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1046         struct video_device *vfd = video_devdata(file);
1047         int ret;
1048
1049         cap->version = LINUX_VERSION_CODE;
1050         cap->device_caps = vfd->device_caps;
1051         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1052
1053         ret = ops->vidioc_querycap(file, fh, cap);
1054
1055         /*
1056          * Drivers must not change device_caps, so check for this and
1057          * warn if this happened.
1058          */
1059         WARN_ON(cap->device_caps != vfd->device_caps);
1060         /*
1061          * Check that capabilities is a superset of
1062          * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1063          */
1064         WARN_ON((cap->capabilities &
1065                  (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1066                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1067         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1068         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1069
1070         return ret;
1071 }
1072
1073 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1074                        struct file *file, void *fh, void *arg)
1075 {
1076         struct video_device *vfd = video_devdata(file);
1077
1078         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1079                 *(int *)arg = 0;
1080                 return 0;
1081         }
1082
1083         return ops->vidioc_g_input(file, fh, arg);
1084 }
1085
1086 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1087                         struct file *file, void *fh, void *arg)
1088 {
1089         struct video_device *vfd = video_devdata(file);
1090
1091         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1092                 *(int *)arg = 0;
1093                 return 0;
1094         }
1095
1096         return ops->vidioc_g_output(file, fh, arg);
1097 }
1098
1099 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1100                                 struct file *file, void *fh, void *arg)
1101 {
1102         struct video_device *vfd = video_devdata(file);
1103         int ret;
1104
1105         ret = v4l_enable_media_source(vfd);
1106         if (ret)
1107                 return ret;
1108
1109         if (vfd->device_caps & V4L2_CAP_IO_MC)
1110                 return  *(int *)arg ? -EINVAL : 0;
1111
1112         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1113 }
1114
1115 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1116                                 struct file *file, void *fh, void *arg)
1117 {
1118         struct video_device *vfd = video_devdata(file);
1119
1120         if (vfd->device_caps & V4L2_CAP_IO_MC)
1121                 return  *(int *)arg ? -EINVAL : 0;
1122
1123         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1124 }
1125
1126 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1127                                 struct file *file, void *fh, void *arg)
1128 {
1129         struct video_device *vfd;
1130         u32 *p = arg;
1131
1132         vfd = video_devdata(file);
1133         *p = v4l2_prio_max(vfd->prio);
1134         return 0;
1135 }
1136
1137 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1138                                 struct file *file, void *fh, void *arg)
1139 {
1140         struct video_device *vfd;
1141         struct v4l2_fh *vfh;
1142         u32 *p = arg;
1143
1144         vfd = video_devdata(file);
1145         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1146                 return -ENOTTY;
1147         vfh = file->private_data;
1148         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1149 }
1150
1151 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1152                                 struct file *file, void *fh, void *arg)
1153 {
1154         struct video_device *vfd = video_devdata(file);
1155         struct v4l2_input *p = arg;
1156
1157         /*
1158          * We set the flags for CAP_DV_TIMINGS &
1159          * CAP_STD here based on ioctl handler provided by the
1160          * driver. If the driver doesn't support these
1161          * for a specific input, it must override these flags.
1162          */
1163         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1164                 p->capabilities |= V4L2_IN_CAP_STD;
1165
1166         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1167                 if (p->index)
1168                         return -EINVAL;
1169                 strscpy(p->name, vfd->name, sizeof(p->name));
1170                 p->type = V4L2_INPUT_TYPE_CAMERA;
1171                 return 0;
1172         }
1173
1174         return ops->vidioc_enum_input(file, fh, p);
1175 }
1176
1177 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1178                                 struct file *file, void *fh, void *arg)
1179 {
1180         struct video_device *vfd = video_devdata(file);
1181         struct v4l2_output *p = arg;
1182
1183         /*
1184          * We set the flags for CAP_DV_TIMINGS &
1185          * CAP_STD here based on ioctl handler provided by the
1186          * driver. If the driver doesn't support these
1187          * for a specific output, it must override these flags.
1188          */
1189         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1190                 p->capabilities |= V4L2_OUT_CAP_STD;
1191
1192         if (vfd->device_caps & V4L2_CAP_IO_MC) {
1193                 if (p->index)
1194                         return -EINVAL;
1195                 strscpy(p->name, vfd->name, sizeof(p->name));
1196                 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1197                 return 0;
1198         }
1199
1200         return ops->vidioc_enum_output(file, fh, p);
1201 }
1202
1203 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1204 {
1205         const unsigned sz = sizeof(fmt->description);
1206         const char *descr = NULL;
1207         u32 flags = 0;
1208
1209         /*
1210          * We depart from the normal coding style here since the descriptions
1211          * should be aligned so it is easy to see which descriptions will be
1212          * longer than 31 characters (the max length for a description).
1213          * And frankly, this is easier to read anyway.
1214          *
1215          * Note that gcc will use O(log N) comparisons to find the right case.
1216          */
1217         switch (fmt->pixelformat) {
1218         /* Max description length mask: descr = "0123456789012345678901234567890" */
1219         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1220         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1221         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1222         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1223         case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1224         case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1225         case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1226         case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1227         case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1228         case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1229         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1230         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1231         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1232         case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1233         case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1234         case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1235         case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1236         case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1237         case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1238         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1239         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1240         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1241         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1242         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1243         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1244         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1245         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1246         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1247         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1248         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1249         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1250         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1251         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1252         case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1253         case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1254         case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1255         case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1256         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1257         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1258         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1259         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1260         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1261         case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1262         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1263         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1264         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1265         case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1266         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1267         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1268         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1269         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1270         case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1271         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1272         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1273         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1274         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1275         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1276         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1277         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1278         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1279         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1280         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1281         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1282         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1283         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1284         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1285         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1286         case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1287         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1288         case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1289         case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1290         case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1291         case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1292         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1293         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1294         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1295         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1296         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1297         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1298         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1299         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1300         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1301         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1302         case V4L2_PIX_FMT_NV12_4L4:     descr = "Y/CbCr 4:2:0 (4x4 Linear)"; break;
1303         case V4L2_PIX_FMT_NV12_16L16:   descr = "Y/CbCr 4:2:0 (16x16 Linear)"; break;
1304         case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/CbCr 4:2:0 (32x32 Linear)"; break;
1305         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1306         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1307         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1308         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1309         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1310         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1311         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1312         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1313         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1314         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1315         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1316         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1317         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1318         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1319         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1320         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1321         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1322         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1323         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1324         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1325         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1326         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1327         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1328         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1329         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1330         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1331         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1332         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1333         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1334         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1335         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1336         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1337         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1338         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1339         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1340         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1341         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1342         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1343         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1344         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1345         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1346         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1347         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1348         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1349         case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1350         case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1351         case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1352         case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1353         case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1354         case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1355         case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1356         case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1357         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1358         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1359         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1360         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1361         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1362         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1363         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1364         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1365         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1366         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1367         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1368         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1369         case V4L2_PIX_FMT_MM21:         descr = "Mediatek 8-bit Block Format"; break;
1370         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1371         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1372         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1373         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1374         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1375         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1376         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1377         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1378         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1379         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1380         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1381         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1382         case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1383         case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1384         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1385         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1386         case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1387         case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1388         case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1389         case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1390         case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1391
1392         default:
1393                 /* Compressed formats */
1394                 flags = V4L2_FMT_FLAG_COMPRESSED;
1395                 switch (fmt->pixelformat) {
1396                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1397                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1398                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1399                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1400                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1401                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1402                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1403                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1404                 case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1405                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1406                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1407                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1408                 case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1409                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1410                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1411                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1412                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1413                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1414                 case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1415                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1416                 case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1417                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1418                 case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1419                 case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1420                 case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1421                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1422                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1423                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1424                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1425                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1426                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1427                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1428                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1429                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1430                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1431                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1432                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1433                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1434                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1435                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1436                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1437                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1438                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1439                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1440                 default:
1441                         if (fmt->description[0])
1442                                 return;
1443                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1444                         flags = 0;
1445                         snprintf(fmt->description, sz, "%p4cc",
1446                                  &fmt->pixelformat);
1447                         break;
1448                 }
1449         }
1450
1451         if (descr)
1452                 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1453         fmt->flags |= flags;
1454 }
1455
1456 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1457                                 struct file *file, void *fh, void *arg)
1458 {
1459         struct video_device *vdev = video_devdata(file);
1460         struct v4l2_fmtdesc *p = arg;
1461         int ret = check_fmt(file, p->type);
1462         u32 mbus_code;
1463         u32 cap_mask;
1464
1465         if (ret)
1466                 return ret;
1467         ret = -EINVAL;
1468
1469         if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1470                 p->mbus_code = 0;
1471
1472         mbus_code = p->mbus_code;
1473         CLEAR_AFTER_FIELD(p, type);
1474         p->mbus_code = mbus_code;
1475
1476         switch (p->type) {
1477         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1478         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1479                 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1480                            V4L2_CAP_VIDEO_M2M_MPLANE;
1481                 if (!!(vdev->device_caps & cap_mask) !=
1482                     (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1483                         break;
1484
1485                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1486                         break;
1487                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1488                 break;
1489         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1490                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1491                         break;
1492                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1493                 break;
1494         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1495         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1496                 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1497                            V4L2_CAP_VIDEO_M2M_MPLANE;
1498                 if (!!(vdev->device_caps & cap_mask) !=
1499                     (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1500                         break;
1501
1502                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1503                         break;
1504                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1505                 break;
1506         case V4L2_BUF_TYPE_SDR_CAPTURE:
1507                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1508                         break;
1509                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1510                 break;
1511         case V4L2_BUF_TYPE_SDR_OUTPUT:
1512                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1513                         break;
1514                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1515                 break;
1516         case V4L2_BUF_TYPE_META_CAPTURE:
1517                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1518                         break;
1519                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1520                 break;
1521         case V4L2_BUF_TYPE_META_OUTPUT:
1522                 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1523                         break;
1524                 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1525                 break;
1526         }
1527         if (ret == 0)
1528                 v4l_fill_fmtdesc(p);
1529         return ret;
1530 }
1531
1532 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1533 {
1534         /*
1535          * The v4l2_pix_format structure contains fields that make no sense for
1536          * touch. Set them to default values in this case.
1537          */
1538
1539         p->field = V4L2_FIELD_NONE;
1540         p->colorspace = V4L2_COLORSPACE_RAW;
1541         p->flags = 0;
1542         p->ycbcr_enc = 0;
1543         p->quantization = 0;
1544         p->xfer_func = 0;
1545 }
1546
1547 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1548                                 struct file *file, void *fh, void *arg)
1549 {
1550         struct v4l2_format *p = arg;
1551         struct video_device *vfd = video_devdata(file);
1552         int ret = check_fmt(file, p->type);
1553
1554         if (ret)
1555                 return ret;
1556
1557         /*
1558          * fmt can't be cleared for these overlay types due to the 'clips'
1559          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1560          * Those are provided by the user. So handle these two overlay types
1561          * first, and then just do a simple memset for the other types.
1562          */
1563         switch (p->type) {
1564         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1565         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1566                 struct v4l2_clip *clips = p->fmt.win.clips;
1567                 u32 clipcount = p->fmt.win.clipcount;
1568                 void __user *bitmap = p->fmt.win.bitmap;
1569
1570                 memset(&p->fmt, 0, sizeof(p->fmt));
1571                 p->fmt.win.clips = clips;
1572                 p->fmt.win.clipcount = clipcount;
1573                 p->fmt.win.bitmap = bitmap;
1574                 break;
1575         }
1576         default:
1577                 memset(&p->fmt, 0, sizeof(p->fmt));
1578                 break;
1579         }
1580
1581         switch (p->type) {
1582         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1583                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1584                         break;
1585                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1586                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1587                 /* just in case the driver zeroed it again */
1588                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1589                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1590                         v4l_pix_format_touch(&p->fmt.pix);
1591                 return ret;
1592         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1593                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1594         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1595                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1596         case V4L2_BUF_TYPE_VBI_CAPTURE:
1597                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1598         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1599                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1600         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1601                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1602                         break;
1603                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1604                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1605                 /* just in case the driver zeroed it again */
1606                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1607                 return ret;
1608         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1609                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1610         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1611                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1612         case V4L2_BUF_TYPE_VBI_OUTPUT:
1613                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1614         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1615                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1616         case V4L2_BUF_TYPE_SDR_CAPTURE:
1617                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1618         case V4L2_BUF_TYPE_SDR_OUTPUT:
1619                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1620         case V4L2_BUF_TYPE_META_CAPTURE:
1621                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1622         case V4L2_BUF_TYPE_META_OUTPUT:
1623                 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1624         }
1625         return -EINVAL;
1626 }
1627
1628 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1629                                 struct file *file, void *fh, void *arg)
1630 {
1631         struct v4l2_format *p = arg;
1632         struct video_device *vfd = video_devdata(file);
1633         int ret = check_fmt(file, p->type);
1634         unsigned int i;
1635
1636         if (ret)
1637                 return ret;
1638
1639         ret = v4l_enable_media_source(vfd);
1640         if (ret)
1641                 return ret;
1642         v4l_sanitize_format(p);
1643
1644         switch (p->type) {
1645         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1646                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1647                         break;
1648                 CLEAR_AFTER_FIELD(p, fmt.pix);
1649                 ret = ops->vidioc_s_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                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1657                         break;
1658                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1659                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1660                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1661                                           bytesperline);
1662                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1663         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1664                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1665                         break;
1666                 CLEAR_AFTER_FIELD(p, fmt.win);
1667                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1668         case V4L2_BUF_TYPE_VBI_CAPTURE:
1669                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1670                         break;
1671                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1672                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1673         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1674                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1675                         break;
1676                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1677                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1678         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1679                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1680                         break;
1681                 CLEAR_AFTER_FIELD(p, fmt.pix);
1682                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1683                 /* just in case the driver zeroed it again */
1684                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1685                 return ret;
1686         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1687                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1688                         break;
1689                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1690                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1691                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1692                                           bytesperline);
1693                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1694         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1695                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1696                         break;
1697                 CLEAR_AFTER_FIELD(p, fmt.win);
1698                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1699         case V4L2_BUF_TYPE_VBI_OUTPUT:
1700                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1701                         break;
1702                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1703                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1704         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1705                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1706                         break;
1707                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1708                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1709         case V4L2_BUF_TYPE_SDR_CAPTURE:
1710                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1711                         break;
1712                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1713                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1714         case V4L2_BUF_TYPE_SDR_OUTPUT:
1715                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1716                         break;
1717                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1718                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1719         case V4L2_BUF_TYPE_META_CAPTURE:
1720                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1721                         break;
1722                 CLEAR_AFTER_FIELD(p, fmt.meta);
1723                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1724         case V4L2_BUF_TYPE_META_OUTPUT:
1725                 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1726                         break;
1727                 CLEAR_AFTER_FIELD(p, fmt.meta);
1728                 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1729         }
1730         return -EINVAL;
1731 }
1732
1733 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1734                                 struct file *file, void *fh, void *arg)
1735 {
1736         struct v4l2_format *p = arg;
1737         struct video_device *vfd = video_devdata(file);
1738         int ret = check_fmt(file, p->type);
1739         unsigned int i;
1740
1741         if (ret)
1742                 return ret;
1743
1744         v4l_sanitize_format(p);
1745
1746         switch (p->type) {
1747         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1748                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1749                         break;
1750                 CLEAR_AFTER_FIELD(p, fmt.pix);
1751                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1752                 /* just in case the driver zeroed it again */
1753                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1754                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1755                         v4l_pix_format_touch(&p->fmt.pix);
1756                 return ret;
1757         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1758                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1759                         break;
1760                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1761                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1762                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1763                                           bytesperline);
1764                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1765         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1766                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1767                         break;
1768                 CLEAR_AFTER_FIELD(p, fmt.win);
1769                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1770         case V4L2_BUF_TYPE_VBI_CAPTURE:
1771                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1772                         break;
1773                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1774                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1775         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1776                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1777                         break;
1778                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1779                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1780         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1781                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1782                         break;
1783                 CLEAR_AFTER_FIELD(p, fmt.pix);
1784                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1785                 /* just in case the driver zeroed it again */
1786                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1787                 return ret;
1788         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1789                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1790                         break;
1791                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1792                 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1793                         CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1794                                           bytesperline);
1795                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1796         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1797                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1798                         break;
1799                 CLEAR_AFTER_FIELD(p, fmt.win);
1800                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1801         case V4L2_BUF_TYPE_VBI_OUTPUT:
1802                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1803                         break;
1804                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1805                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1806         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1807                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1808                         break;
1809                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1810                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1811         case V4L2_BUF_TYPE_SDR_CAPTURE:
1812                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1813                         break;
1814                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1815                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1816         case V4L2_BUF_TYPE_SDR_OUTPUT:
1817                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1818                         break;
1819                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1820                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1821         case V4L2_BUF_TYPE_META_CAPTURE:
1822                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1823                         break;
1824                 CLEAR_AFTER_FIELD(p, fmt.meta);
1825                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1826         case V4L2_BUF_TYPE_META_OUTPUT:
1827                 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1828                         break;
1829                 CLEAR_AFTER_FIELD(p, fmt.meta);
1830                 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1831         }
1832         return -EINVAL;
1833 }
1834
1835 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1836                                 struct file *file, void *fh, void *arg)
1837 {
1838         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1839 }
1840
1841 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1842                                 struct file *file, void *fh, void *arg)
1843 {
1844         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1845 }
1846
1847 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1848                                 struct file *file, void *fh, void *arg)
1849 {
1850         struct video_device *vfd = video_devdata(file);
1851         struct v4l2_tuner *p = arg;
1852         int err;
1853
1854         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1855                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1856         err = ops->vidioc_g_tuner(file, fh, p);
1857         if (!err)
1858                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1859         return err;
1860 }
1861
1862 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1863                                 struct file *file, void *fh, void *arg)
1864 {
1865         struct video_device *vfd = video_devdata(file);
1866         struct v4l2_tuner *p = arg;
1867         int ret;
1868
1869         ret = v4l_enable_media_source(vfd);
1870         if (ret)
1871                 return ret;
1872         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1873                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1874         return ops->vidioc_s_tuner(file, fh, p);
1875 }
1876
1877 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1878                                 struct file *file, void *fh, void *arg)
1879 {
1880         struct video_device *vfd = video_devdata(file);
1881         struct v4l2_modulator *p = arg;
1882         int err;
1883
1884         if (vfd->vfl_type == VFL_TYPE_RADIO)
1885                 p->type = V4L2_TUNER_RADIO;
1886
1887         err = ops->vidioc_g_modulator(file, fh, p);
1888         if (!err)
1889                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1890         return err;
1891 }
1892
1893 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1894                                 struct file *file, void *fh, void *arg)
1895 {
1896         struct video_device *vfd = video_devdata(file);
1897         struct v4l2_modulator *p = arg;
1898
1899         if (vfd->vfl_type == VFL_TYPE_RADIO)
1900                 p->type = V4L2_TUNER_RADIO;
1901
1902         return ops->vidioc_s_modulator(file, fh, p);
1903 }
1904
1905 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1906                                 struct file *file, void *fh, void *arg)
1907 {
1908         struct video_device *vfd = video_devdata(file);
1909         struct v4l2_frequency *p = arg;
1910
1911         if (vfd->vfl_type == VFL_TYPE_SDR)
1912                 p->type = V4L2_TUNER_SDR;
1913         else
1914                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1915                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1916         return ops->vidioc_g_frequency(file, fh, p);
1917 }
1918
1919 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1920                                 struct file *file, void *fh, void *arg)
1921 {
1922         struct video_device *vfd = video_devdata(file);
1923         const struct v4l2_frequency *p = arg;
1924         enum v4l2_tuner_type type;
1925         int ret;
1926
1927         ret = v4l_enable_media_source(vfd);
1928         if (ret)
1929                 return ret;
1930         if (vfd->vfl_type == VFL_TYPE_SDR) {
1931                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1932                         return -EINVAL;
1933         } else {
1934                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1935                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1936                 if (type != p->type)
1937                         return -EINVAL;
1938         }
1939         return ops->vidioc_s_frequency(file, fh, p);
1940 }
1941
1942 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1943                                 struct file *file, void *fh, void *arg)
1944 {
1945         struct video_device *vfd = video_devdata(file);
1946         struct v4l2_standard *p = arg;
1947
1948         return v4l_video_std_enumstd(p, vfd->tvnorms);
1949 }
1950
1951 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1952                                 struct file *file, void *fh, void *arg)
1953 {
1954         struct video_device *vfd = video_devdata(file);
1955         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1956         int ret;
1957
1958         ret = v4l_enable_media_source(vfd);
1959         if (ret)
1960                 return ret;
1961         norm = id & vfd->tvnorms;
1962         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1963                 return -EINVAL;
1964
1965         /* Calls the specific handler */
1966         return ops->vidioc_s_std(file, fh, norm);
1967 }
1968
1969 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1970                                 struct file *file, void *fh, void *arg)
1971 {
1972         struct video_device *vfd = video_devdata(file);
1973         v4l2_std_id *p = arg;
1974         int ret;
1975
1976         ret = v4l_enable_media_source(vfd);
1977         if (ret)
1978                 return ret;
1979         /*
1980          * If no signal is detected, then the driver should return
1981          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1982          * any standards that do not apply removed.
1983          *
1984          * This means that tuners, audio and video decoders can join
1985          * their efforts to improve the standards detection.
1986          */
1987         *p = vfd->tvnorms;
1988         return ops->vidioc_querystd(file, fh, arg);
1989 }
1990
1991 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1992                                 struct file *file, void *fh, void *arg)
1993 {
1994         struct video_device *vfd = video_devdata(file);
1995         struct v4l2_hw_freq_seek *p = arg;
1996         enum v4l2_tuner_type type;
1997         int ret;
1998
1999         ret = v4l_enable_media_source(vfd);
2000         if (ret)
2001                 return ret;
2002         /* s_hw_freq_seek is not supported for SDR for now */
2003         if (vfd->vfl_type == VFL_TYPE_SDR)
2004                 return -EINVAL;
2005
2006         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2007                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2008         if (p->type != type)
2009                 return -EINVAL;
2010         return ops->vidioc_s_hw_freq_seek(file, fh, p);
2011 }
2012
2013 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2014                                 struct file *file, void *fh, void *arg)
2015 {
2016         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2017 }
2018
2019 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2020                                 struct file *file, void *fh, void *arg)
2021 {
2022         struct v4l2_requestbuffers *p = arg;
2023         int ret = check_fmt(file, p->type);
2024
2025         if (ret)
2026                 return ret;
2027
2028         CLEAR_AFTER_FIELD(p, flags);
2029
2030         return ops->vidioc_reqbufs(file, fh, p);
2031 }
2032
2033 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2034                                 struct file *file, void *fh, void *arg)
2035 {
2036         struct v4l2_buffer *p = arg;
2037         int ret = check_fmt(file, p->type);
2038
2039         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2040 }
2041
2042 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2043                                 struct file *file, void *fh, void *arg)
2044 {
2045         struct v4l2_buffer *p = arg;
2046         int ret = check_fmt(file, p->type);
2047
2048         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2049 }
2050
2051 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2052                                 struct file *file, void *fh, void *arg)
2053 {
2054         struct v4l2_buffer *p = arg;
2055         int ret = check_fmt(file, p->type);
2056
2057         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2058 }
2059
2060 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2061                                 struct file *file, void *fh, void *arg)
2062 {
2063         struct v4l2_create_buffers *create = arg;
2064         int ret = check_fmt(file, create->format.type);
2065
2066         if (ret)
2067                 return ret;
2068
2069         CLEAR_AFTER_FIELD(create, flags);
2070
2071         v4l_sanitize_format(&create->format);
2072
2073         ret = ops->vidioc_create_bufs(file, fh, create);
2074
2075         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2076             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2077                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2078
2079         return ret;
2080 }
2081
2082 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2083                                 struct file *file, void *fh, void *arg)
2084 {
2085         struct v4l2_buffer *b = arg;
2086         int ret = check_fmt(file, b->type);
2087
2088         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2089 }
2090
2091 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2092                                 struct file *file, void *fh, void *arg)
2093 {
2094         struct video_device *vfd = video_devdata(file);
2095         struct v4l2_streamparm *p = arg;
2096         v4l2_std_id std;
2097         int ret = check_fmt(file, p->type);
2098
2099         if (ret)
2100                 return ret;
2101         if (ops->vidioc_g_parm)
2102                 return ops->vidioc_g_parm(file, fh, p);
2103         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2104             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2105                 return -EINVAL;
2106         if (vfd->device_caps & V4L2_CAP_READWRITE)
2107                 p->parm.capture.readbuffers = 2;
2108         ret = ops->vidioc_g_std(file, fh, &std);
2109         if (ret == 0)
2110                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2111         return ret;
2112 }
2113
2114 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2115                                 struct file *file, void *fh, void *arg)
2116 {
2117         struct v4l2_streamparm *p = arg;
2118         int ret = check_fmt(file, p->type);
2119
2120         if (ret)
2121                 return ret;
2122
2123         /* Note: extendedmode is never used in drivers */
2124         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2125                 memset(p->parm.output.reserved, 0,
2126                        sizeof(p->parm.output.reserved));
2127                 p->parm.output.extendedmode = 0;
2128                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2129         } else {
2130                 memset(p->parm.capture.reserved, 0,
2131                        sizeof(p->parm.capture.reserved));
2132                 p->parm.capture.extendedmode = 0;
2133                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2134         }
2135         return ops->vidioc_s_parm(file, fh, p);
2136 }
2137
2138 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2139                                 struct file *file, void *fh, void *arg)
2140 {
2141         struct video_device *vfd = video_devdata(file);
2142         struct v4l2_queryctrl *p = arg;
2143         struct v4l2_fh *vfh =
2144                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2145
2146         if (vfh && vfh->ctrl_handler)
2147                 return v4l2_queryctrl(vfh->ctrl_handler, p);
2148         if (vfd->ctrl_handler)
2149                 return v4l2_queryctrl(vfd->ctrl_handler, p);
2150         if (ops->vidioc_queryctrl)
2151                 return ops->vidioc_queryctrl(file, fh, p);
2152         return -ENOTTY;
2153 }
2154
2155 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2156                                 struct file *file, void *fh, void *arg)
2157 {
2158         struct video_device *vfd = video_devdata(file);
2159         struct v4l2_query_ext_ctrl *p = arg;
2160         struct v4l2_fh *vfh =
2161                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2162
2163         if (vfh && vfh->ctrl_handler)
2164                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2165         if (vfd->ctrl_handler)
2166                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2167         if (ops->vidioc_query_ext_ctrl)
2168                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2169         return -ENOTTY;
2170 }
2171
2172 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2173                                 struct file *file, void *fh, void *arg)
2174 {
2175         struct video_device *vfd = video_devdata(file);
2176         struct v4l2_querymenu *p = arg;
2177         struct v4l2_fh *vfh =
2178                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2179
2180         if (vfh && vfh->ctrl_handler)
2181                 return v4l2_querymenu(vfh->ctrl_handler, p);
2182         if (vfd->ctrl_handler)
2183                 return v4l2_querymenu(vfd->ctrl_handler, p);
2184         if (ops->vidioc_querymenu)
2185                 return ops->vidioc_querymenu(file, fh, p);
2186         return -ENOTTY;
2187 }
2188
2189 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2190                                 struct file *file, void *fh, void *arg)
2191 {
2192         struct video_device *vfd = video_devdata(file);
2193         struct v4l2_control *p = arg;
2194         struct v4l2_fh *vfh =
2195                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2196         struct v4l2_ext_controls ctrls;
2197         struct v4l2_ext_control ctrl;
2198
2199         if (vfh && vfh->ctrl_handler)
2200                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2201         if (vfd->ctrl_handler)
2202                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2203         if (ops->vidioc_g_ctrl)
2204                 return ops->vidioc_g_ctrl(file, fh, p);
2205         if (ops->vidioc_g_ext_ctrls == NULL)
2206                 return -ENOTTY;
2207
2208         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2209         ctrls.count = 1;
2210         ctrls.controls = &ctrl;
2211         ctrl.id = p->id;
2212         ctrl.value = p->value;
2213         if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2214                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2215
2216                 if (ret == 0)
2217                         p->value = ctrl.value;
2218                 return ret;
2219         }
2220         return -EINVAL;
2221 }
2222
2223 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2224                                 struct file *file, void *fh, void *arg)
2225 {
2226         struct video_device *vfd = video_devdata(file);
2227         struct v4l2_control *p = arg;
2228         struct v4l2_fh *vfh =
2229                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2230         struct v4l2_ext_controls ctrls;
2231         struct v4l2_ext_control ctrl;
2232         int ret;
2233
2234         if (vfh && vfh->ctrl_handler)
2235                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2236         if (vfd->ctrl_handler)
2237                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2238         if (ops->vidioc_s_ctrl)
2239                 return ops->vidioc_s_ctrl(file, fh, p);
2240         if (ops->vidioc_s_ext_ctrls == NULL)
2241                 return -ENOTTY;
2242
2243         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2244         ctrls.count = 1;
2245         ctrls.controls = &ctrl;
2246         ctrl.id = p->id;
2247         ctrl.value = p->value;
2248         if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2249                 return -EINVAL;
2250         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2251         p->value = ctrl.value;
2252         return ret;
2253 }
2254
2255 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2256                                 struct file *file, void *fh, void *arg)
2257 {
2258         struct video_device *vfd = video_devdata(file);
2259         struct v4l2_ext_controls *p = arg;
2260         struct v4l2_fh *vfh =
2261                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2262
2263         p->error_idx = p->count;
2264         if (vfh && vfh->ctrl_handler)
2265                 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2266                                         vfd, vfd->v4l2_dev->mdev, p);
2267         if (vfd->ctrl_handler)
2268                 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2269                                         vfd, vfd->v4l2_dev->mdev, p);
2270         if (ops->vidioc_g_ext_ctrls == NULL)
2271                 return -ENOTTY;
2272         return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2273                                 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2274 }
2275
2276 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2277                                 struct file *file, void *fh, void *arg)
2278 {
2279         struct video_device *vfd = video_devdata(file);
2280         struct v4l2_ext_controls *p = arg;
2281         struct v4l2_fh *vfh =
2282                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2283
2284         p->error_idx = p->count;
2285         if (vfh && vfh->ctrl_handler)
2286                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2287                                         vfd, vfd->v4l2_dev->mdev, p);
2288         if (vfd->ctrl_handler)
2289                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2290                                         vfd, vfd->v4l2_dev->mdev, p);
2291         if (ops->vidioc_s_ext_ctrls == NULL)
2292                 return -ENOTTY;
2293         return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2294                                 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2295 }
2296
2297 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2298                                 struct file *file, void *fh, void *arg)
2299 {
2300         struct video_device *vfd = video_devdata(file);
2301         struct v4l2_ext_controls *p = arg;
2302         struct v4l2_fh *vfh =
2303                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2304
2305         p->error_idx = p->count;
2306         if (vfh && vfh->ctrl_handler)
2307                 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2308                                           vfd, vfd->v4l2_dev->mdev, p);
2309         if (vfd->ctrl_handler)
2310                 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2311                                           vfd, vfd->v4l2_dev->mdev, p);
2312         if (ops->vidioc_try_ext_ctrls == NULL)
2313                 return -ENOTTY;
2314         return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2315                         ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2316 }
2317
2318 /*
2319  * The selection API specified originally that the _MPLANE buffer types
2320  * shouldn't be used. The reasons for this are lost in the mists of time
2321  * (or just really crappy memories). Regardless, this is really annoying
2322  * for userspace. So to keep things simple we map _MPLANE buffer types
2323  * to their 'regular' counterparts before calling the driver. And we
2324  * restore it afterwards. This way applications can use either buffer
2325  * type and drivers don't need to check for both.
2326  */
2327 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2328                            struct file *file, void *fh, void *arg)
2329 {
2330         struct v4l2_selection *p = arg;
2331         u32 old_type = p->type;
2332         int ret;
2333
2334         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2335                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2336         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2337                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2338         ret = ops->vidioc_g_selection(file, fh, p);
2339         p->type = old_type;
2340         return ret;
2341 }
2342
2343 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2344                            struct file *file, void *fh, void *arg)
2345 {
2346         struct v4l2_selection *p = arg;
2347         u32 old_type = p->type;
2348         int ret;
2349
2350         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2351                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2352         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2353                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2354         ret = ops->vidioc_s_selection(file, fh, p);
2355         p->type = old_type;
2356         return ret;
2357 }
2358
2359 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2360                                 struct file *file, void *fh, void *arg)
2361 {
2362         struct video_device *vfd = video_devdata(file);
2363         struct v4l2_crop *p = arg;
2364         struct v4l2_selection s = {
2365                 .type = p->type,
2366         };
2367         int ret;
2368
2369         /* simulate capture crop using selection api */
2370
2371         /* crop means compose for output devices */
2372         if (V4L2_TYPE_IS_OUTPUT(p->type))
2373                 s.target = V4L2_SEL_TGT_COMPOSE;
2374         else
2375                 s.target = V4L2_SEL_TGT_CROP;
2376
2377         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2378                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2379                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2380
2381         ret = v4l_g_selection(ops, file, fh, &s);
2382
2383         /* copying results to old structure on success */
2384         if (!ret)
2385                 p->c = s.r;
2386         return ret;
2387 }
2388
2389 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2390                                 struct file *file, void *fh, void *arg)
2391 {
2392         struct video_device *vfd = video_devdata(file);
2393         struct v4l2_crop *p = arg;
2394         struct v4l2_selection s = {
2395                 .type = p->type,
2396                 .r = p->c,
2397         };
2398
2399         /* simulate capture crop using selection api */
2400
2401         /* crop means compose for output devices */
2402         if (V4L2_TYPE_IS_OUTPUT(p->type))
2403                 s.target = V4L2_SEL_TGT_COMPOSE;
2404         else
2405                 s.target = V4L2_SEL_TGT_CROP;
2406
2407         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2408                 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2409                         V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2410
2411         return v4l_s_selection(ops, file, fh, &s);
2412 }
2413
2414 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2415                                 struct file *file, void *fh, void *arg)
2416 {
2417         struct video_device *vfd = video_devdata(file);
2418         struct v4l2_cropcap *p = arg;
2419         struct v4l2_selection s = { .type = p->type };
2420         int ret = 0;
2421
2422         /* setting trivial pixelaspect */
2423         p->pixelaspect.numerator = 1;
2424         p->pixelaspect.denominator = 1;
2425
2426         if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2427                 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2428         else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2429                 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2430
2431         /*
2432          * The determine_valid_ioctls() call already should ensure
2433          * that this can never happen, but just in case...
2434          */
2435         if (WARN_ON(!ops->vidioc_g_selection))
2436                 return -ENOTTY;
2437
2438         if (ops->vidioc_g_pixelaspect)
2439                 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2440                                                 &p->pixelaspect);
2441
2442         /*
2443          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2444          * square pixel aspect ratio in that case.
2445          */
2446         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2447                 return ret;
2448
2449         /* Use g_selection() to fill in the bounds and defrect rectangles */
2450
2451         /* obtaining bounds */
2452         if (V4L2_TYPE_IS_OUTPUT(p->type))
2453                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2454         else
2455                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2456
2457         if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2458                 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2459                         V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2460
2461         ret = v4l_g_selection(ops, file, fh, &s);
2462         if (ret)
2463                 return ret;
2464         p->bounds = s.r;
2465
2466         /* obtaining defrect */
2467         if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2468                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2469         else
2470                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2471
2472         ret = v4l_g_selection(ops, file, fh, &s);
2473         if (ret)
2474                 return ret;
2475         p->defrect = s.r;
2476
2477         return 0;
2478 }
2479
2480 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2481                                 struct file *file, void *fh, void *arg)
2482 {
2483         struct video_device *vfd = video_devdata(file);
2484         int ret;
2485
2486         if (vfd->v4l2_dev)
2487                 pr_info("%s: =================  START STATUS  =================\n",
2488                         vfd->v4l2_dev->name);
2489         ret = ops->vidioc_log_status(file, fh);
2490         if (vfd->v4l2_dev)
2491                 pr_info("%s: ==================  END STATUS  ==================\n",
2492                         vfd->v4l2_dev->name);
2493         return ret;
2494 }
2495
2496 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2497                                 struct file *file, void *fh, void *arg)
2498 {
2499 #ifdef CONFIG_VIDEO_ADV_DEBUG
2500         struct v4l2_dbg_register *p = arg;
2501         struct video_device *vfd = video_devdata(file);
2502         struct v4l2_subdev *sd;
2503         int idx = 0;
2504
2505         if (!capable(CAP_SYS_ADMIN))
2506                 return -EPERM;
2507         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2508                 if (vfd->v4l2_dev == NULL)
2509                         return -EINVAL;
2510                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2511                         if (p->match.addr == idx++)
2512                                 return v4l2_subdev_call(sd, core, g_register, p);
2513                 return -EINVAL;
2514         }
2515         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2516             (ops->vidioc_g_chip_info || p->match.addr == 0))
2517                 return ops->vidioc_g_register(file, fh, p);
2518         return -EINVAL;
2519 #else
2520         return -ENOTTY;
2521 #endif
2522 }
2523
2524 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2525                                 struct file *file, void *fh, void *arg)
2526 {
2527 #ifdef CONFIG_VIDEO_ADV_DEBUG
2528         const struct v4l2_dbg_register *p = arg;
2529         struct video_device *vfd = video_devdata(file);
2530         struct v4l2_subdev *sd;
2531         int idx = 0;
2532
2533         if (!capable(CAP_SYS_ADMIN))
2534                 return -EPERM;
2535         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2536                 if (vfd->v4l2_dev == NULL)
2537                         return -EINVAL;
2538                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2539                         if (p->match.addr == idx++)
2540                                 return v4l2_subdev_call(sd, core, s_register, p);
2541                 return -EINVAL;
2542         }
2543         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2544             (ops->vidioc_g_chip_info || p->match.addr == 0))
2545                 return ops->vidioc_s_register(file, fh, p);
2546         return -EINVAL;
2547 #else
2548         return -ENOTTY;
2549 #endif
2550 }
2551
2552 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2553                                 struct file *file, void *fh, void *arg)
2554 {
2555 #ifdef CONFIG_VIDEO_ADV_DEBUG
2556         struct video_device *vfd = video_devdata(file);
2557         struct v4l2_dbg_chip_info *p = arg;
2558         struct v4l2_subdev *sd;
2559         int idx = 0;
2560
2561         switch (p->match.type) {
2562         case V4L2_CHIP_MATCH_BRIDGE:
2563                 if (ops->vidioc_s_register)
2564                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2565                 if (ops->vidioc_g_register)
2566                         p->flags |= V4L2_CHIP_FL_READABLE;
2567                 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2568                 if (ops->vidioc_g_chip_info)
2569                         return ops->vidioc_g_chip_info(file, fh, arg);
2570                 if (p->match.addr)
2571                         return -EINVAL;
2572                 return 0;
2573
2574         case V4L2_CHIP_MATCH_SUBDEV:
2575                 if (vfd->v4l2_dev == NULL)
2576                         break;
2577                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2578                         if (p->match.addr != idx++)
2579                                 continue;
2580                         if (sd->ops->core && sd->ops->core->s_register)
2581                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2582                         if (sd->ops->core && sd->ops->core->g_register)
2583                                 p->flags |= V4L2_CHIP_FL_READABLE;
2584                         strscpy(p->name, sd->name, sizeof(p->name));
2585                         return 0;
2586                 }
2587                 break;
2588         }
2589         return -EINVAL;
2590 #else
2591         return -ENOTTY;
2592 #endif
2593 }
2594
2595 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2596                                 struct file *file, void *fh, void *arg)
2597 {
2598         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2599 }
2600
2601 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2602                                 struct file *file, void *fh, void *arg)
2603 {
2604         return ops->vidioc_subscribe_event(fh, arg);
2605 }
2606
2607 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2608                                 struct file *file, void *fh, void *arg)
2609 {
2610         return ops->vidioc_unsubscribe_event(fh, arg);
2611 }
2612
2613 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2614                                 struct file *file, void *fh, void *arg)
2615 {
2616         struct v4l2_sliced_vbi_cap *p = arg;
2617         int ret = check_fmt(file, p->type);
2618
2619         if (ret)
2620                 return ret;
2621
2622         /* Clear up to type, everything after type is zeroed already */
2623         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2624
2625         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2626 }
2627
2628 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2629                                 struct file *file, void *fh, void *arg)
2630 {
2631         struct video_device *vfd = video_devdata(file);
2632         struct v4l2_frequency_band *p = arg;
2633         enum v4l2_tuner_type type;
2634         int err;
2635
2636         if (vfd->vfl_type == VFL_TYPE_SDR) {
2637                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2638                         return -EINVAL;
2639                 type = p->type;
2640         } else {
2641                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2642                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2643                 if (type != p->type)
2644                         return -EINVAL;
2645         }
2646         if (ops->vidioc_enum_freq_bands) {
2647                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2648                 if (err != -ENOTTY)
2649                         return err;
2650         }
2651         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2652                 struct v4l2_tuner t = {
2653                         .index = p->tuner,
2654                         .type = type,
2655                 };
2656
2657                 if (p->index)
2658                         return -EINVAL;
2659                 err = ops->vidioc_g_tuner(file, fh, &t);
2660                 if (err)
2661                         return err;
2662                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2663                 p->rangelow = t.rangelow;
2664                 p->rangehigh = t.rangehigh;
2665                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2666                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2667                 return 0;
2668         }
2669         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2670                 struct v4l2_modulator m = {
2671                         .index = p->tuner,
2672                 };
2673
2674                 if (type != V4L2_TUNER_RADIO)
2675                         return -EINVAL;
2676                 if (p->index)
2677                         return -EINVAL;
2678                 err = ops->vidioc_g_modulator(file, fh, &m);
2679                 if (err)
2680                         return err;
2681                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2682                 p->rangelow = m.rangelow;
2683                 p->rangehigh = m.rangehigh;
2684                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2685                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2686                 return 0;
2687         }
2688         return -ENOTTY;
2689 }
2690
2691 struct v4l2_ioctl_info {
2692         unsigned int ioctl;
2693         u32 flags;
2694         const char * const name;
2695         int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2696                     void *fh, void *p);
2697         void (*debug)(const void *arg, bool write_only);
2698 };
2699
2700 /* This control needs a priority check */
2701 #define INFO_FL_PRIO            (1 << 0)
2702 /* This control can be valid if the filehandle passes a control handler. */
2703 #define INFO_FL_CTRL            (1 << 1)
2704 /* Queuing ioctl */
2705 #define INFO_FL_QUEUE           (1 << 2)
2706 /* Always copy back result, even on error */
2707 #define INFO_FL_ALWAYS_COPY     (1 << 3)
2708 /* Zero struct from after the field to the end */
2709 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2710         ((offsetof(struct v4l2_struct, field) +                 \
2711           sizeof_field(struct v4l2_struct, field)) << 16)
2712 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2713
2714 #define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2715         static int v4l_stub_ ## _vidioc(                        \
2716                         const struct v4l2_ioctl_ops *ops,       \
2717                         struct file *file, void *fh, void *p)   \
2718         {                                                       \
2719                 return ops->vidioc_ ## _vidioc(file, fh, p);    \
2720         }
2721
2722 #define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2723         [_IOC_NR(_ioctl)] = {                                   \
2724                 .ioctl = _ioctl,                                \
2725                 .flags = _flags,                                \
2726                 .name = #_ioctl,                                \
2727                 .func = _func,                                  \
2728                 .debug = _debug,                                \
2729         }
2730
2731 DEFINE_V4L_STUB_FUNC(g_fbuf)
2732 DEFINE_V4L_STUB_FUNC(s_fbuf)
2733 DEFINE_V4L_STUB_FUNC(expbuf)
2734 DEFINE_V4L_STUB_FUNC(g_std)
2735 DEFINE_V4L_STUB_FUNC(g_audio)
2736 DEFINE_V4L_STUB_FUNC(s_audio)
2737 DEFINE_V4L_STUB_FUNC(g_edid)
2738 DEFINE_V4L_STUB_FUNC(s_edid)
2739 DEFINE_V4L_STUB_FUNC(g_audout)
2740 DEFINE_V4L_STUB_FUNC(s_audout)
2741 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2742 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2743 DEFINE_V4L_STUB_FUNC(enumaudio)
2744 DEFINE_V4L_STUB_FUNC(enumaudout)
2745 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2746 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2747 DEFINE_V4L_STUB_FUNC(g_enc_index)
2748 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2749 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2750 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2751 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2752 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2753 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2754 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2755 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2756 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2757
2758 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2759         IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2760         IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2761         IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2762         IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2763         IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2764         IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2765         IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2766         IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2767         IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2768         IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2769         IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2770         IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2771         IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2772         IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2773         IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2774         IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2775         IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2776         IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2777         IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2778         IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2779         IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2780         IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2781         IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2782         IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2783         IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2784         IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2785         IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2786         IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2787         IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2788         IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2789         IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2790         IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2791         IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2792         IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2793         IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2794         IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2795         IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2796         IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2797         IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2798         IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2799         IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2800         IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2801         IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2802         IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2803         IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2804         IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2805         IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2806         IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2807         IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2808         IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2809         IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2810         IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2811         IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2812         IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2813         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)),
2814         IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2815         IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2816         IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2817         IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2818         IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2819         IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2820         IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2821         IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2822         IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2823         IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2824         IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2825         IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2826         IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2827         IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2828         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)),
2829         IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2830         IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2831         IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2832         IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2833         IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2834         IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2835         IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2836         IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2837         IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2838         IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2839         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)),
2840         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)),
2841 };
2842 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2843
2844 static bool v4l2_is_known_ioctl(unsigned int cmd)
2845 {
2846         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2847                 return false;
2848         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2849 }
2850
2851 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2852                                          struct v4l2_fh *vfh, unsigned int cmd,
2853                                          void *arg)
2854 {
2855         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2856                 return vdev->lock;
2857         if (vfh && vfh->m2m_ctx &&
2858             (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2859                 if (vfh->m2m_ctx->q_lock)
2860                         return vfh->m2m_ctx->q_lock;
2861         }
2862         if (vdev->queue && vdev->queue->lock &&
2863                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2864                 return vdev->queue->lock;
2865         return vdev->lock;
2866 }
2867
2868 /* Common ioctl debug function. This function can be used by
2869    external ioctl messages as well as internal V4L ioctl */
2870 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2871 {
2872         const char *dir, *type;
2873
2874         if (prefix)
2875                 printk(KERN_DEBUG "%s: ", prefix);
2876
2877         switch (_IOC_TYPE(cmd)) {
2878         case 'd':
2879                 type = "v4l2_int";
2880                 break;
2881         case 'V':
2882                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2883                         type = "v4l2";
2884                         break;
2885                 }
2886                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2887                 return;
2888         default:
2889                 type = "unknown";
2890                 break;
2891         }
2892
2893         switch (_IOC_DIR(cmd)) {
2894         case _IOC_NONE:              dir = "--"; break;
2895         case _IOC_READ:              dir = "r-"; break;
2896         case _IOC_WRITE:             dir = "-w"; break;
2897         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2898         default:                     dir = "*ERR*"; break;
2899         }
2900         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2901                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2902 }
2903 EXPORT_SYMBOL(v4l_printk_ioctl);
2904
2905 static long __video_do_ioctl(struct file *file,
2906                 unsigned int cmd, void *arg)
2907 {
2908         struct video_device *vfd = video_devdata(file);
2909         struct mutex *req_queue_lock = NULL;
2910         struct mutex *lock; /* ioctl serialization mutex */
2911         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2912         bool write_only = false;
2913         struct v4l2_ioctl_info default_info;
2914         const struct v4l2_ioctl_info *info;
2915         void *fh = file->private_data;
2916         struct v4l2_fh *vfh = NULL;
2917         int dev_debug = vfd->dev_debug;
2918         long ret = -ENOTTY;
2919
2920         if (ops == NULL) {
2921                 pr_warn("%s: has no ioctl_ops.\n",
2922                                 video_device_node_name(vfd));
2923                 return ret;
2924         }
2925
2926         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2927                 vfh = file->private_data;
2928
2929         /*
2930          * We need to serialize streamon/off with queueing new requests.
2931          * These ioctls may trigger the cancellation of a streaming
2932          * operation, and that should not be mixed with queueing a new
2933          * request at the same time.
2934          */
2935         if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2936             (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2937                 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2938
2939                 if (mutex_lock_interruptible(req_queue_lock))
2940                         return -ERESTARTSYS;
2941         }
2942
2943         lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2944
2945         if (lock && mutex_lock_interruptible(lock)) {
2946                 if (req_queue_lock)
2947                         mutex_unlock(req_queue_lock);
2948                 return -ERESTARTSYS;
2949         }
2950
2951         if (!video_is_registered(vfd)) {
2952                 ret = -ENODEV;
2953                 goto unlock;
2954         }
2955
2956         if (v4l2_is_known_ioctl(cmd)) {
2957                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2958
2959                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2960                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2961                         goto done;
2962
2963                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2964                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2965                         if (ret)
2966                                 goto done;
2967                 }
2968         } else {
2969                 default_info.ioctl = cmd;
2970                 default_info.flags = 0;
2971                 default_info.debug = v4l_print_default;
2972                 info = &default_info;
2973         }
2974
2975         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2976         if (info != &default_info) {
2977                 ret = info->func(ops, file, fh, arg);
2978         } else if (!ops->vidioc_default) {
2979                 ret = -ENOTTY;
2980         } else {
2981                 ret = ops->vidioc_default(file, fh,
2982                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2983                         cmd, arg);
2984         }
2985
2986 done:
2987         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2988                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2989                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2990                         goto unlock;
2991
2992                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2993                 if (ret < 0)
2994                         pr_cont(": error %ld", ret);
2995                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2996                         pr_cont("\n");
2997                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2998                         info->debug(arg, write_only);
2999                 else {
3000                         pr_cont(": ");
3001                         info->debug(arg, write_only);
3002                 }
3003         }
3004
3005 unlock:
3006         if (lock)
3007                 mutex_unlock(lock);
3008         if (req_queue_lock)
3009                 mutex_unlock(req_queue_lock);
3010         return ret;
3011 }
3012
3013 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3014                             void __user **user_ptr, void ***kernel_ptr)
3015 {
3016         int ret = 0;
3017
3018         switch (cmd) {
3019         case VIDIOC_PREPARE_BUF:
3020         case VIDIOC_QUERYBUF:
3021         case VIDIOC_QBUF:
3022         case VIDIOC_DQBUF: {
3023                 struct v4l2_buffer *buf = parg;
3024
3025                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3026                         if (buf->length > VIDEO_MAX_PLANES) {
3027                                 ret = -EINVAL;
3028                                 break;
3029                         }
3030                         *user_ptr = (void __user *)buf->m.planes;
3031                         *kernel_ptr = (void **)&buf->m.planes;
3032                         *array_size = sizeof(struct v4l2_plane) * buf->length;
3033                         ret = 1;
3034                 }
3035                 break;
3036         }
3037
3038         case VIDIOC_G_EDID:
3039         case VIDIOC_S_EDID: {
3040                 struct v4l2_edid *edid = parg;
3041
3042                 if (edid->blocks) {
3043                         if (edid->blocks > 256) {
3044                                 ret = -EINVAL;
3045                                 break;
3046                         }
3047                         *user_ptr = (void __user *)edid->edid;
3048                         *kernel_ptr = (void **)&edid->edid;
3049                         *array_size = edid->blocks * 128;
3050                         ret = 1;
3051                 }
3052                 break;
3053         }
3054
3055         case VIDIOC_S_EXT_CTRLS:
3056         case VIDIOC_G_EXT_CTRLS:
3057         case VIDIOC_TRY_EXT_CTRLS: {
3058                 struct v4l2_ext_controls *ctrls = parg;
3059
3060                 if (ctrls->count != 0) {
3061                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3062                                 ret = -EINVAL;
3063                                 break;
3064                         }
3065                         *user_ptr = (void __user *)ctrls->controls;
3066                         *kernel_ptr = (void **)&ctrls->controls;
3067                         *array_size = sizeof(struct v4l2_ext_control)
3068                                     * ctrls->count;
3069                         ret = 1;
3070                 }
3071                 break;
3072         }
3073         case VIDIOC_G_FMT:
3074         case VIDIOC_S_FMT:
3075         case VIDIOC_TRY_FMT: {
3076                 struct v4l2_format *fmt = parg;
3077
3078                 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3079                     fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3080                         break;
3081                 if (fmt->fmt.win.clipcount > 2048)
3082                         return -EINVAL;
3083                 if (!fmt->fmt.win.clipcount)
3084                         break;
3085
3086                 *user_ptr = (void __user *)fmt->fmt.win.clips;
3087                 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3088                 *array_size = sizeof(struct v4l2_clip)
3089                                 * fmt->fmt.win.clipcount;
3090
3091                 ret = 1;
3092                 break;
3093         }
3094         }
3095
3096         return ret;
3097 }
3098
3099 static unsigned int video_translate_cmd(unsigned int cmd)
3100 {
3101 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3102         switch (cmd) {
3103         case VIDIOC_DQEVENT_TIME32:
3104                 return VIDIOC_DQEVENT;
3105         case VIDIOC_QUERYBUF_TIME32:
3106                 return VIDIOC_QUERYBUF;
3107         case VIDIOC_QBUF_TIME32:
3108                 return VIDIOC_QBUF;
3109         case VIDIOC_DQBUF_TIME32:
3110                 return VIDIOC_DQBUF;
3111         case VIDIOC_PREPARE_BUF_TIME32:
3112                 return VIDIOC_PREPARE_BUF;
3113         }
3114 #endif
3115         if (in_compat_syscall())
3116                 return v4l2_compat_translate_cmd(cmd);
3117
3118         return cmd;
3119 }
3120
3121 static int video_get_user(void __user *arg, void *parg,
3122                           unsigned int real_cmd, unsigned int cmd,
3123                           bool *always_copy)
3124 {
3125         unsigned int n = _IOC_SIZE(real_cmd);
3126         int err = 0;
3127
3128         if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3129                 /* read-only ioctl */
3130                 memset(parg, 0, n);
3131                 return 0;
3132         }
3133
3134         /*
3135          * In some cases, only a few fields are used as input,
3136          * i.e. when the app sets "index" and then the driver
3137          * fills in the rest of the structure for the thing
3138          * with that index.  We only need to copy up the first
3139          * non-input field.
3140          */
3141         if (v4l2_is_known_ioctl(real_cmd)) {
3142                 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3143
3144                 if (flags & INFO_FL_CLEAR_MASK)
3145                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3146                 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3147         }
3148
3149         if (cmd == real_cmd) {
3150                 if (copy_from_user(parg, (void __user *)arg, n))
3151                         err = -EFAULT;
3152         } else if (in_compat_syscall()) {
3153                 memset(parg, 0, n);
3154                 err = v4l2_compat_get_user(arg, parg, cmd);
3155         } else {
3156                 memset(parg, 0, n);
3157 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3158                 switch (cmd) {
3159                 case VIDIOC_QUERYBUF_TIME32:
3160                 case VIDIOC_QBUF_TIME32:
3161                 case VIDIOC_DQBUF_TIME32:
3162                 case VIDIOC_PREPARE_BUF_TIME32: {
3163                         struct v4l2_buffer_time32 vb32;
3164                         struct v4l2_buffer *vb = parg;
3165
3166                         if (copy_from_user(&vb32, arg, sizeof(vb32)))
3167                                 return -EFAULT;
3168
3169                         *vb = (struct v4l2_buffer) {
3170                                 .index          = vb32.index,
3171                                 .type           = vb32.type,
3172                                 .bytesused      = vb32.bytesused,
3173                                 .flags          = vb32.flags,
3174                                 .field          = vb32.field,
3175                                 .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3176                                 .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3177                                 .timecode       = vb32.timecode,
3178                                 .sequence       = vb32.sequence,
3179                                 .memory         = vb32.memory,
3180                                 .m.userptr      = vb32.m.userptr,
3181                                 .length         = vb32.length,
3182                                 .request_fd     = vb32.request_fd,
3183                         };
3184                         break;
3185                 }
3186                 }
3187 #endif
3188         }
3189
3190         /* zero out anything we don't copy from userspace */
3191         if (!err && n < _IOC_SIZE(real_cmd))
3192                 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3193         return err;
3194 }
3195
3196 static int video_put_user(void __user *arg, void *parg,
3197                           unsigned int real_cmd, unsigned int cmd)
3198 {
3199         if (!(_IOC_DIR(cmd) & _IOC_READ))
3200                 return 0;
3201
3202         if (cmd == real_cmd) {
3203                 /*  Copy results into user buffer  */
3204                 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3205                         return -EFAULT;
3206                 return 0;
3207         }
3208
3209         if (in_compat_syscall())
3210                 return v4l2_compat_put_user(arg, parg, cmd);
3211
3212 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3213         switch (cmd) {
3214         case VIDIOC_DQEVENT_TIME32: {
3215                 struct v4l2_event *ev = parg;
3216                 struct v4l2_event_time32 ev32;
3217
3218                 memset(&ev32, 0, sizeof(ev32));
3219
3220                 ev32.type       = ev->type;
3221                 ev32.pending    = ev->pending;
3222                 ev32.sequence   = ev->sequence;
3223                 ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3224                 ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3225                 ev32.id         = ev->id;
3226
3227                 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3228                 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3229
3230                 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3231                         return -EFAULT;
3232                 break;
3233         }
3234         case VIDIOC_QUERYBUF_TIME32:
3235         case VIDIOC_QBUF_TIME32:
3236         case VIDIOC_DQBUF_TIME32:
3237         case VIDIOC_PREPARE_BUF_TIME32: {
3238                 struct v4l2_buffer *vb = parg;
3239                 struct v4l2_buffer_time32 vb32;
3240
3241                 memset(&vb32, 0, sizeof(vb32));
3242
3243                 vb32.index      = vb->index;
3244                 vb32.type       = vb->type;
3245                 vb32.bytesused  = vb->bytesused;
3246                 vb32.flags      = vb->flags;
3247                 vb32.field      = vb->field;
3248                 vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3249                 vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3250                 vb32.timecode   = vb->timecode;
3251                 vb32.sequence   = vb->sequence;
3252                 vb32.memory     = vb->memory;
3253                 vb32.m.userptr  = vb->m.userptr;
3254                 vb32.length     = vb->length;
3255                 vb32.request_fd = vb->request_fd;
3256
3257                 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3258                         return -EFAULT;
3259                 break;
3260         }
3261         }
3262 #endif
3263
3264         return 0;
3265 }
3266
3267 long
3268 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3269                v4l2_kioctl func)
3270 {
3271         char    sbuf[128];
3272         void    *mbuf = NULL, *array_buf = NULL;
3273         void    *parg = (void *)arg;
3274         long    err  = -EINVAL;
3275         bool    has_array_args;
3276         bool    always_copy = false;
3277         size_t  array_size = 0;
3278         void __user *user_ptr = NULL;
3279         void    **kernel_ptr = NULL;
3280         unsigned int cmd = video_translate_cmd(orig_cmd);
3281         const size_t ioc_size = _IOC_SIZE(cmd);
3282
3283         /*  Copy arguments into temp kernel buffer  */
3284         if (_IOC_DIR(cmd) != _IOC_NONE) {
3285                 if (ioc_size <= sizeof(sbuf)) {
3286                         parg = sbuf;
3287                 } else {
3288                         /* too big to allocate from stack */
3289                         mbuf = kmalloc(ioc_size, GFP_KERNEL);
3290                         if (NULL == mbuf)
3291                                 return -ENOMEM;
3292                         parg = mbuf;
3293                 }
3294
3295                 err = video_get_user((void __user *)arg, parg, cmd,
3296                                      orig_cmd, &always_copy);
3297                 if (err)
3298                         goto out;
3299         }
3300
3301         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3302         if (err < 0)
3303                 goto out;
3304         has_array_args = err;
3305
3306         if (has_array_args) {
3307                 array_buf = kvmalloc(array_size, GFP_KERNEL);
3308                 err = -ENOMEM;
3309                 if (array_buf == NULL)
3310                         goto out_array_args;
3311                 err = -EFAULT;
3312                 if (in_compat_syscall())
3313                         err = v4l2_compat_get_array_args(file, array_buf,
3314                                                          user_ptr, array_size,
3315                                                          orig_cmd, parg);
3316                 else
3317                         err = copy_from_user(array_buf, user_ptr, array_size) ?
3318                                                                 -EFAULT : 0;
3319                 if (err)
3320                         goto out_array_args;
3321                 *kernel_ptr = array_buf;
3322         }
3323
3324         /* Handles IOCTL */
3325         err = func(file, cmd, parg);
3326         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3327                 err = -ENOTTY;
3328                 goto out;
3329         }
3330
3331         if (err == 0) {
3332                 if (cmd == VIDIOC_DQBUF)
3333                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3334                 else if (cmd == VIDIOC_QBUF)
3335                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3336         }
3337
3338         if (has_array_args) {
3339                 *kernel_ptr = (void __force *)user_ptr;
3340                 if (in_compat_syscall()) {
3341                         int put_err;
3342
3343                         put_err = v4l2_compat_put_array_args(file, user_ptr,
3344                                                              array_buf,
3345                                                              array_size,
3346                                                              orig_cmd, parg);
3347                         if (put_err)
3348                                 err = put_err;
3349                 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3350                         err = -EFAULT;
3351                 }
3352                 goto out_array_args;
3353         }
3354         /*
3355          * Some ioctls can return an error, but still have valid
3356          * results that must be returned.
3357          */
3358         if (err < 0 && !always_copy)
3359                 goto out;
3360
3361 out_array_args:
3362         if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3363                 err = -EFAULT;
3364 out:
3365         kvfree(array_buf);
3366         kfree(mbuf);
3367         return err;
3368 }
3369
3370 long video_ioctl2(struct file *file,
3371                unsigned int cmd, unsigned long arg)
3372 {
3373         return video_usercopy(file, cmd, arg, __video_do_ioctl);
3374 }
3375 EXPORT_SYMBOL(video_ioctl2);