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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/v4l2-mc.h>
  31
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparations. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [0]                                = "0",
 146         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 147         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 148         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 149         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 150         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 151         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 152         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 153         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 154         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 155         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 156         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 157         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 158 };
 159 EXPORT_SYMBOL(v4l2_type_names);
 160
 161 static const char *v4l2_memory_names[] = {
 162         [V4L2_MEMORY_MMAP]    = "mmap",
 163         [V4L2_MEMORY_USERPTR] = "userptr",
 164         [V4L2_MEMORY_OVERLAY] = "overlay",
 165         [V4L2_MEMORY_DMABUF] = "dmabuf",
 166 };
 167
 168 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 169
 170 /* ------------------------------------------------------------------ */
 171 /* debug help functions                                               */
 172
 173 static void v4l_print_querycap(const void *arg, bool write_only)
 174 {
 175         const struct v4l2_capability *p = arg;
 176
 177         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 178                 "capabilities=0x%08x, device_caps=0x%08x\n",
 179                 (int)sizeof(p->driver), p->driver,
 180                 (int)sizeof(p->card), p->card,
 181                 (int)sizeof(p->bus_info), p->bus_info,
 182                 p->version, p->capabilities, p->device_caps);
 183 }
 184
 185 static void v4l_print_enuminput(const void *arg, bool write_only)
 186 {
 187         const struct v4l2_input *p = arg;
 188
 189         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 190                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 191                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 192                 p->tuner, (unsigned long long)p->std, p->status,
 193                 p->capabilities);
 194 }
 195
 196 static void v4l_print_enumoutput(const void *arg, bool write_only)
 197 {
 198         const struct v4l2_output *p = arg;
 199
 200         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 201                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 202                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 203                 p->modulator, (unsigned long long)p->std, p->capabilities);
 204 }
 205
 206 static void v4l_print_audio(const void *arg, bool write_only)
 207 {
 208         const struct v4l2_audio *p = arg;
 209
 210         if (write_only)
 211                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 212         else
 213                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 214                         p->index, (int)sizeof(p->name), p->name,
 215                         p->capability, p->mode);
 216 }
 217
 218 static void v4l_print_audioout(const void *arg, bool write_only)
 219 {
 220         const struct v4l2_audioout *p = arg;
 221
 222         if (write_only)
 223                 pr_cont("index=%u\n", p->index);
 224         else
 225                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 226                         p->index, (int)sizeof(p->name), p->name,
 227                         p->capability, p->mode);
 228 }
 229
 230 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 231 {
 232         const struct v4l2_fmtdesc *p = arg;
 233
 234         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 235                 p->index, prt_names(p->type, v4l2_type_names),
 236                 p->flags, (p->pixelformat & 0xff),
 237                 (p->pixelformat >>  8) & 0xff,
 238                 (p->pixelformat >> 16) & 0xff,
 239                 (p->pixelformat >> 24) & 0xff,
 240                 (int)sizeof(p->description), p->description);
 241 }
 242
 243 static void v4l_print_format(const void *arg, bool write_only)
 244 {
 245         const struct v4l2_format *p = arg;
 246         const struct v4l2_pix_format *pix;
 247         const struct v4l2_pix_format_mplane *mp;
 248         const struct v4l2_vbi_format *vbi;
 249         const struct v4l2_sliced_vbi_format *sliced;
 250         const struct v4l2_window *win;
 251         const struct v4l2_sdr_format *sdr;
 252         unsigned i;
 253
 254         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 255         switch (p->type) {
 256         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 257         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 258                 pix = &p->fmt.pix;
 259                 pr_cont(", width=%u, height=%u, "
 260                         "pixelformat=%c%c%c%c, field=%s, "
 261                         "bytesperline=%u, sizeimage=%u, colorspace=%d, "
 262                         "flags=0x%x, ycbcr_enc=%u, quantization=%u, "
 263                         "xfer_func=%u\n",
 264                         pix->width, pix->height,
 265                         (pix->pixelformat & 0xff),
 266                         (pix->pixelformat >>  8) & 0xff,
 267                         (pix->pixelformat >> 16) & 0xff,
 268                         (pix->pixelformat >> 24) & 0xff,
 269                         prt_names(pix->field, v4l2_field_names),
 270                         pix->bytesperline, pix->sizeimage,
 271                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 272                         pix->quantization, pix->xfer_func);
 273                 break;
 274         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 275         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 276                 mp = &p->fmt.pix_mp;
 277                 pr_cont(", width=%u, height=%u, "
 278                         "format=%c%c%c%c, field=%s, "
 279                         "colorspace=%d, num_planes=%u, flags=0x%x, "
 280                         "ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 281                         mp->width, mp->height,
 282                         (mp->pixelformat & 0xff),
 283                         (mp->pixelformat >>  8) & 0xff,
 284                         (mp->pixelformat >> 16) & 0xff,
 285                         (mp->pixelformat >> 24) & 0xff,
 286                         prt_names(mp->field, v4l2_field_names),
 287                         mp->colorspace, mp->num_planes, mp->flags,
 288                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 289                 for (i = 0; i < mp->num_planes; i++)
 290                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 291                                         mp->plane_fmt[i].bytesperline,
 292                                         mp->plane_fmt[i].sizeimage);
 293                 break;
 294         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 295         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 296                 win = &p->fmt.win;
 297                 /* Note: we can't print the clip list here since the clips
 298                  * pointer is a userspace pointer, not a kernelspace
 299                  * pointer. */
 300                 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",
 301                         win->w.width, win->w.height, win->w.left, win->w.top,
 302                         prt_names(win->field, v4l2_field_names),
 303                         win->chromakey, win->clipcount, win->clips,
 304                         win->bitmap, win->global_alpha);
 305                 break;
 306         case V4L2_BUF_TYPE_VBI_CAPTURE:
 307         case V4L2_BUF_TYPE_VBI_OUTPUT:
 308                 vbi = &p->fmt.vbi;
 309                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 310                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 311                         vbi->sampling_rate, vbi->offset,
 312                         vbi->samples_per_line,
 313                         (vbi->sample_format & 0xff),
 314                         (vbi->sample_format >>  8) & 0xff,
 315                         (vbi->sample_format >> 16) & 0xff,
 316                         (vbi->sample_format >> 24) & 0xff,
 317                         vbi->start[0], vbi->start[1],
 318                         vbi->count[0], vbi->count[1]);
 319                 break;
 320         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 321         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 322                 sliced = &p->fmt.sliced;
 323                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 324                                 sliced->service_set, sliced->io_size);
 325                 for (i = 0; i < 24; i++)
 326                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 327                                 sliced->service_lines[0][i],
 328                                 sliced->service_lines[1][i]);
 329                 break;
 330         case V4L2_BUF_TYPE_SDR_CAPTURE:
 331         case V4L2_BUF_TYPE_SDR_OUTPUT:
 332                 sdr = &p->fmt.sdr;
 333                 pr_cont(", pixelformat=%c%c%c%c\n",
 334                         (sdr->pixelformat >>  0) & 0xff,
 335                         (sdr->pixelformat >>  8) & 0xff,
 336                         (sdr->pixelformat >> 16) & 0xff,
 337                         (sdr->pixelformat >> 24) & 0xff);
 338                 break;
 339         }
 340 }
 341
 342 static void v4l_print_framebuffer(const void *arg, bool write_only)
 343 {
 344         const struct v4l2_framebuffer *p = arg;
 345
 346         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 347                 "height=%u, pixelformat=%c%c%c%c, "
 348                 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 349                         p->capability, p->flags, p->base,
 350                         p->fmt.width, p->fmt.height,
 351                         (p->fmt.pixelformat & 0xff),
 352                         (p->fmt.pixelformat >>  8) & 0xff,
 353                         (p->fmt.pixelformat >> 16) & 0xff,
 354                         (p->fmt.pixelformat >> 24) & 0xff,
 355                         p->fmt.bytesperline, p->fmt.sizeimage,
 356                         p->fmt.colorspace);
 357 }
 358
 359 static void v4l_print_buftype(const void *arg, bool write_only)
 360 {
 361         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 362 }
 363
 364 static void v4l_print_modulator(const void *arg, bool write_only)
 365 {
 366         const struct v4l2_modulator *p = arg;
 367
 368         if (write_only)
 369                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 370         else
 371                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
 372                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 373                         p->index, (int)sizeof(p->name), p->name, p->capability,
 374                         p->rangelow, p->rangehigh, p->txsubchans);
 375 }
 376
 377 static void v4l_print_tuner(const void *arg, bool write_only)
 378 {
 379         const struct v4l2_tuner *p = arg;
 380
 381         if (write_only)
 382                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 383         else
 384                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 385                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 386                         "rxsubchans=0x%x, audmode=%u\n",
 387                         p->index, (int)sizeof(p->name), p->name, p->type,
 388                         p->capability, p->rangelow,
 389                         p->rangehigh, p->signal, p->afc,
 390                         p->rxsubchans, p->audmode);
 391 }
 392
 393 static void v4l_print_frequency(const void *arg, bool write_only)
 394 {
 395         const struct v4l2_frequency *p = arg;
 396
 397         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 398                                 p->tuner, p->type, p->frequency);
 399 }
 400
 401 static void v4l_print_standard(const void *arg, bool write_only)
 402 {
 403         const struct v4l2_standard *p = arg;
 404
 405         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 406                 "framelines=%u\n", p->index,
 407                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 408                 p->frameperiod.numerator,
 409                 p->frameperiod.denominator,
 410                 p->framelines);
 411 }
 412
 413 static void v4l_print_std(const void *arg, bool write_only)
 414 {
 415         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 416 }
 417
 418 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 419 {
 420         const struct v4l2_hw_freq_seek *p = arg;
 421
 422         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 423                 "rangelow=%u, rangehigh=%u\n",
 424                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 425                 p->rangelow, p->rangehigh);
 426 }
 427
 428 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 429 {
 430         const struct v4l2_requestbuffers *p = arg;
 431
 432         pr_cont("count=%d, type=%s, memory=%s\n",
 433                 p->count,
 434                 prt_names(p->type, v4l2_type_names),
 435                 prt_names(p->memory, v4l2_memory_names));
 436 }
 437
 438 static void v4l_print_buffer(const void *arg, bool write_only)
 439 {
 440         const struct v4l2_buffer *p = arg;
 441         const struct v4l2_timecode *tc = &p->timecode;
 442         const struct v4l2_plane *plane;
 443         int i;
 444
 445         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 446                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
 447                         p->timestamp.tv_sec / 3600,
 448                         (int)(p->timestamp.tv_sec / 60) % 60,
 449                         (int)(p->timestamp.tv_sec % 60),
 450                         (long)p->timestamp.tv_usec,
 451                         p->index,
 452                         prt_names(p->type, v4l2_type_names),
 453                         p->flags, prt_names(p->field, v4l2_field_names),
 454                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 455
 456         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 457                 pr_cont("\n");
 458                 for (i = 0; i < p->length; ++i) {
 459                         plane = &p->m.planes[i];
 460                         printk(KERN_DEBUG
 461                                 "plane %d: bytesused=%d, data_offset=0x%08x, "
 462                                 "offset/userptr=0x%lx, length=%d\n",
 463                                 i, plane->bytesused, plane->data_offset,
 464                                 plane->m.userptr, plane->length);
 465                 }
 466         } else {
 467                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 468                         p->bytesused, p->m.userptr, p->length);
 469         }
 470
 471         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
 472                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
 473                         tc->hours, tc->minutes, tc->seconds,
 474                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 475 }
 476
 477 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 478 {
 479         const struct v4l2_exportbuffer *p = arg;
 480
 481         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 482                 p->fd, prt_names(p->type, v4l2_type_names),
 483                 p->index, p->plane, p->flags);
 484 }
 485
 486 static void v4l_print_create_buffers(const void *arg, bool write_only)
 487 {
 488         const struct v4l2_create_buffers *p = arg;
 489
 490         pr_cont("index=%d, count=%d, memory=%s, ",
 491                         p->index, p->count,
 492                         prt_names(p->memory, v4l2_memory_names));
 493         v4l_print_format(&p->format, write_only);
 494 }
 495
 496 static void v4l_print_streamparm(const void *arg, bool write_only)
 497 {
 498         const struct v4l2_streamparm *p = arg;
 499
 500         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 501
 502         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 503             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 504                 const struct v4l2_captureparm *c = &p->parm.capture;
 505
 506                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 507                         "extendedmode=%d, readbuffers=%d\n",
 508                         c->capability, c->capturemode,
 509                         c->timeperframe.numerator, c->timeperframe.denominator,
 510                         c->extendedmode, c->readbuffers);
 511         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 512                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 513                 const struct v4l2_outputparm *c = &p->parm.output;
 514
 515                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 516                         "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, "
 530                 "step=%d, default=%d, flags=0x%08x\n",
 531                         p->id, p->type, (int)sizeof(p->name), p->name,
 532                         p->minimum, p->maximum,
 533                         p->step, p->default_value, p->flags);
 534 }
 535
 536 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 537 {
 538         const struct v4l2_query_ext_ctrl *p = arg;
 539
 540         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
 541                 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
 542                 "nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 543                         p->id, p->type, (int)sizeof(p->name), p->name,
 544                         p->minimum, p->maximum,
 545                         p->step, p->default_value, p->flags,
 546                         p->elem_size, p->elems, p->nr_of_dims,
 547                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 548 }
 549
 550 static void v4l_print_querymenu(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_querymenu *p = arg;
 553
 554         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 555 }
 556
 557 static void v4l_print_control(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_control *p = arg;
 560
 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",
 570                         p->which, p->count, p->error_idx);
 571         for (i = 0; i < p->count; i++) {
 572                 if (!p->controls[i].size)
 573                         pr_cont(", id/val=0x%x/0x%x",
 574                                 p->controls[i].id, p->controls[i].value);
 575                 else
 576                         pr_cont(", id/size=0x%x/%u",
 577                                 p->controls[i].id, p->controls[i].size);
 578         }
 579         pr_cont("\n");
 580 }
 581
 582 static void v4l_print_cropcap(const void *arg, bool write_only)
 583 {
 584         const struct v4l2_cropcap *p = arg;
 585
 586         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
 587                 "defrect wxh=%dx%d, x,y=%d,%d, "
 588                 "pixelaspect %d/%d\n",
 589                 prt_names(p->type, v4l2_type_names),
 590                 p->bounds.width, p->bounds.height,
 591                 p->bounds.left, p->bounds.top,
 592                 p->defrect.width, p->defrect.height,
 593                 p->defrect.left, p->defrect.top,
 594                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 595 }
 596
 597 static void v4l_print_crop(const void *arg, bool write_only)
 598 {
 599         const struct v4l2_crop *p = arg;
 600
 601         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 602                 prt_names(p->type, v4l2_type_names),
 603                 p->c.width, p->c.height,
 604                 p->c.left, p->c.top);
 605 }
 606
 607 static void v4l_print_selection(const void *arg, bool write_only)
 608 {
 609         const struct v4l2_selection *p = arg;
 610
 611         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 612                 prt_names(p->type, v4l2_type_names),
 613                 p->target, p->flags,
 614                 p->r.width, p->r.height, p->r.left, p->r.top);
 615 }
 616
 617 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 618 {
 619         const struct v4l2_jpegcompression *p = arg;
 620
 621         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 622                 "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, "
 690                         "pixelclock=%llu, "
 691                         "width=%u, height=%u, polarities=0x%x, "
 692                         "hfrontporch=%u, hsync=%u, "
 693                         "hbackporch=%u, vfrontporch=%u, "
 694                         "vsync=%u, vbackporch=%u, "
 695                         "il_vfrontporch=%u, il_vsync=%u, "
 696                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 697                                 p->bt.interlaced, p->bt.pixelclock,
 698                                 p->bt.width, p->bt.height,
 699                                 p->bt.polarities, p->bt.hfrontporch,
 700                                 p->bt.hsync, p->bt.hbackporch,
 701                                 p->bt.vfrontporch, p->bt.vsync,
 702                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 703                                 p->bt.il_vsync, p->bt.il_vbackporch,
 704                                 p->bt.standards, p->bt.flags);
 705                 break;
 706         default:
 707                 pr_cont("type=%d\n", p->type);
 708                 break;
 709         }
 710 }
 711
 712 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 713 {
 714         const struct v4l2_enum_dv_timings *p = arg;
 715
 716         pr_cont("index=%u, ", p->index);
 717         v4l_print_dv_timings(&p->timings, write_only);
 718 }
 719
 720 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 721 {
 722         const struct v4l2_dv_timings_cap *p = arg;
 723
 724         switch (p->type) {
 725         case V4L2_DV_BT_656_1120:
 726                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 727                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 728                         p->bt.min_width, p->bt.max_width,
 729                         p->bt.min_height, p->bt.max_height,
 730                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 731                         p->bt.standards, p->bt.capabilities);
 732                 break;
 733         default:
 734                 pr_cont("type=%u\n", p->type);
 735                 break;
 736         }
 737 }
 738
 739 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 740 {
 741         const struct v4l2_frmsizeenum *p = arg;
 742
 743         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 744                         p->index,
 745                         (p->pixel_format & 0xff),
 746                         (p->pixel_format >>  8) & 0xff,
 747                         (p->pixel_format >> 16) & 0xff,
 748                         (p->pixel_format >> 24) & 0xff,
 749                         p->type);
 750         switch (p->type) {
 751         case V4L2_FRMSIZE_TYPE_DISCRETE:
 752                 pr_cont(", wxh=%ux%u\n",
 753                         p->discrete.width, p->discrete.height);
 754                 break;
 755         case V4L2_FRMSIZE_TYPE_STEPWISE:
 756                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 757                                 p->stepwise.min_width,  p->stepwise.min_height,
 758                                 p->stepwise.step_width, p->stepwise.step_height,
 759                                 p->stepwise.max_width,  p->stepwise.max_height);
 760                 break;
 761         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 762                 /* fall through */
 763         default:
 764                 pr_cont("\n");
 765                 break;
 766         }
 767 }
 768
 769 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 770 {
 771         const struct v4l2_frmivalenum *p = arg;
 772
 773         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 774                         p->index,
 775                         (p->pixel_format & 0xff),
 776                         (p->pixel_format >>  8) & 0xff,
 777                         (p->pixel_format >> 16) & 0xff,
 778                         (p->pixel_format >> 24) & 0xff,
 779                         p->width, p->height, p->type);
 780         switch (p->type) {
 781         case V4L2_FRMIVAL_TYPE_DISCRETE:
 782                 pr_cont(", fps=%d/%d\n",
 783                                 p->discrete.numerator,
 784                                 p->discrete.denominator);
 785                 break;
 786         case V4L2_FRMIVAL_TYPE_STEPWISE:
 787                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 788                                 p->stepwise.min.numerator,
 789                                 p->stepwise.min.denominator,
 790                                 p->stepwise.max.numerator,
 791                                 p->stepwise.max.denominator,
 792                                 p->stepwise.step.numerator,
 793                                 p->stepwise.step.denominator);
 794                 break;
 795         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 796                 /* fall through */
 797         default:
 798                 pr_cont("\n");
 799                 break;
 800         }
 801 }
 802
 803 static void v4l_print_event(const void *arg, bool write_only)
 804 {
 805         const struct v4l2_event *p = arg;
 806         const struct v4l2_event_ctrl *c;
 807
 808         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 809                 "timestamp=%lu.%9.9lu\n",
 810                         p->type, p->pending, p->sequence, p->id,
 811                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 812         switch (p->type) {
 813         case V4L2_EVENT_VSYNC:
 814                 printk(KERN_DEBUG "field=%s\n",
 815                         prt_names(p->u.vsync.field, v4l2_field_names));
 816                 break;
 817         case V4L2_EVENT_CTRL:
 818                 c = &p->u.ctrl;
 819                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 820                         c->changes, c->type);
 821                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 822                         pr_cont("value64=%lld, ", c->value64);
 823                 else
 824                         pr_cont("value=%d, ", c->value);
 825                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 826                         "default_value=%d\n",
 827                         c->flags, c->minimum, c->maximum,
 828                         c->step, c->default_value);
 829                 break;
 830         case V4L2_EVENT_FRAME_SYNC:
 831                 pr_cont("frame_sequence=%u\n",
 832                         p->u.frame_sync.frame_sequence);
 833                 break;
 834         }
 835 }
 836
 837 static void v4l_print_event_subscription(const void *arg, bool write_only)
 838 {
 839         const struct v4l2_event_subscription *p = arg;
 840
 841         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 842                         p->type, p->id, p->flags);
 843 }
 844
 845 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 846 {
 847         const struct v4l2_sliced_vbi_cap *p = arg;
 848         int i;
 849
 850         pr_cont("type=%s, service_set=0x%08x\n",
 851                         prt_names(p->type, v4l2_type_names), p->service_set);
 852         for (i = 0; i < 24; i++)
 853                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 854                                 p->service_lines[0][i],
 855                                 p->service_lines[1][i]);
 856 }
 857
 858 static void v4l_print_freq_band(const void *arg, bool write_only)
 859 {
 860         const struct v4l2_frequency_band *p = arg;
 861
 862         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 863                 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 864                         p->tuner, p->type, p->index,
 865                         p->capability, p->rangelow,
 866                         p->rangehigh, p->modulation);
 867 }
 868
 869 static void v4l_print_edid(const void *arg, bool write_only)
 870 {
 871         const struct v4l2_edid *p = arg;
 872
 873         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 874                 p->pad, p->start_block, p->blocks);
 875 }
 876
 877 static void v4l_print_u32(const void *arg, bool write_only)
 878 {
 879         pr_cont("value=%u\n", *(const u32 *)arg);
 880 }
 881
 882 static void v4l_print_newline(const void *arg, bool write_only)
 883 {
 884         pr_cont("\n");
 885 }
 886
 887 static void v4l_print_default(const void *arg, bool write_only)
 888 {
 889         pr_cont("driver-specific ioctl\n");
 890 }
 891
 892 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 893 {
 894         __u32 i;
 895
 896         /* zero the reserved fields */
 897         c->reserved[0] = c->reserved[1] = 0;
 898         for (i = 0; i < c->count; i++)
 899                 c->controls[i].reserved2[0] = 0;
 900
 901         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 902            when using extended controls.
 903            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 904            is it allowed for backwards compatibility.
 905          */
 906         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 907                 return 0;
 908         if (!c->which)
 909                 return 1;
 910         /* Check that all controls are from the same control class. */
 911         for (i = 0; i < c->count; i++) {
 912                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 913                         c->error_idx = i;
 914                         return 0;
 915                 }
 916         }
 917         return 1;
 918 }
 919
 920 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 921 {
 922         struct video_device *vfd = video_devdata(file);
 923         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 924         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 925         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 926         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 927         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 928         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 929         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 930
 931         if (ops == NULL)
 932                 return -EINVAL;
 933
 934         switch (type) {
 935         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 936                 if ((is_vid || is_tch) && is_rx &&
 937                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 938                         return 0;
 939                 break;
 940         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 941                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 942                         return 0;
 943                 break;
 944         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 945                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 946                         return 0;
 947                 break;
 948         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 949                 if (is_vid && is_tx &&
 950                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 954                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 958                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_VBI_CAPTURE:
 962                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 963                         return 0;
 964                 break;
 965         case V4L2_BUF_TYPE_VBI_OUTPUT:
 966                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 967                         return 0;
 968                 break;
 969         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 970                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 971                         return 0;
 972                 break;
 973         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 974                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 975                         return 0;
 976                 break;
 977         case V4L2_BUF_TYPE_SDR_CAPTURE:
 978                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 979                         return 0;
 980                 break;
 981         case V4L2_BUF_TYPE_SDR_OUTPUT:
 982                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 983                         return 0;
 984                 break;
 985         default:
 986                 break;
 987         }
 988         return -EINVAL;
 989 }
 990
 991 static void v4l_sanitize_format(struct v4l2_format *fmt)
 992 {
 993         unsigned int offset;
 994
 995         /*
 996          * The v4l2_pix_format structure has been extended with fields that were
 997          * not previously required to be set to zero by applications. The priv
 998          * field, when set to a magic value, indicates the the extended fields
 999          * are valid. Otherwise they will contain undefined values. To simplify
1000          * the API towards drivers zero the extended fields and set the priv
1001          * field to the magic value when the extended pixel format structure
1002          * isn't used by applications.
1003          */
1004
1005         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1006             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1007                 return;
1008
1009         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1010                 return;
1011
1012         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1013
1014         offset = offsetof(struct v4l2_pix_format, priv)
1015                + sizeof(fmt->fmt.pix.priv);
1016         memset(((void *)&fmt->fmt.pix) + offset, 0,
1017                sizeof(fmt->fmt.pix) - offset);
1018 }
1019
1020 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1021                                 struct file *file, void *fh, void *arg)
1022 {
1023         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1024         struct video_device *vfd = video_devdata(file);
1025         int ret;
1026
1027         cap->version = LINUX_VERSION_CODE;
1028         cap->device_caps = vfd->device_caps;
1029         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1030
1031         ret = ops->vidioc_querycap(file, fh, cap);
1032
1033         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1034         /*
1035          * Drivers MUST fill in device_caps, so check for this and
1036          * warn if it was forgotten.
1037          */
1038         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1039                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1040                 cap->driver, cap->capabilities, cap->device_caps);
1041         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1042
1043         return ret;
1044 }
1045
1046 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1047                                 struct file *file, void *fh, void *arg)
1048 {
1049         struct video_device *vfd = video_devdata(file);
1050         int ret;
1051
1052         ret = v4l_enable_media_source(vfd);
1053         if (ret)
1054                 return ret;
1055         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1056 }
1057
1058 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1059                                 struct file *file, void *fh, void *arg)
1060 {
1061         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1062 }
1063
1064 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1065                                 struct file *file, void *fh, void *arg)
1066 {
1067         struct video_device *vfd;
1068         u32 *p = arg;
1069
1070         vfd = video_devdata(file);
1071         *p = v4l2_prio_max(vfd->prio);
1072         return 0;
1073 }
1074
1075 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1076                                 struct file *file, void *fh, void *arg)
1077 {
1078         struct video_device *vfd;
1079         struct v4l2_fh *vfh;
1080         u32 *p = arg;
1081
1082         vfd = video_devdata(file);
1083         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1084                 return -ENOTTY;
1085         vfh = file->private_data;
1086         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1087 }
1088
1089 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1090                                 struct file *file, void *fh, void *arg)
1091 {
1092         struct video_device *vfd = video_devdata(file);
1093         struct v4l2_input *p = arg;
1094
1095         /*
1096          * We set the flags for CAP_DV_TIMINGS &
1097          * CAP_STD here based on ioctl handler provided by the
1098          * driver. If the driver doesn't support these
1099          * for a specific input, it must override these flags.
1100          */
1101         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1102                 p->capabilities |= V4L2_IN_CAP_STD;
1103
1104         return ops->vidioc_enum_input(file, fh, p);
1105 }
1106
1107 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1108                                 struct file *file, void *fh, void *arg)
1109 {
1110         struct video_device *vfd = video_devdata(file);
1111         struct v4l2_output *p = arg;
1112
1113         /*
1114          * We set the flags for CAP_DV_TIMINGS &
1115          * CAP_STD here based on ioctl handler provided by the
1116          * driver. If the driver doesn't support these
1117          * for a specific output, it must override these flags.
1118          */
1119         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1120                 p->capabilities |= V4L2_OUT_CAP_STD;
1121
1122         return ops->vidioc_enum_output(file, fh, p);
1123 }
1124
1125 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1126 {
1127         const unsigned sz = sizeof(fmt->description);
1128         const char *descr = NULL;
1129         u32 flags = 0;
1130
1131         /*
1132          * We depart from the normal coding style here since the descriptions
1133          * should be aligned so it is easy to see which descriptions will be
1134          * longer than 31 characters (the max length for a description).
1135          * And frankly, this is easier to read anyway.
1136          *
1137          * Note that gcc will use O(log N) comparisons to find the right case.
1138          */
1139         switch (fmt->pixelformat) {
1140         /* Max description length mask: descr = "0123456789012345678901234567890" */
1141         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1142         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1143         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1144         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1145         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1146         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1147         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1148         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1149         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1150         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1151         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1152         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1153         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1154         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1155         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1156         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1157         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1158         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1159         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1160         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1161         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1162         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1163         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1164         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1165         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1166         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1167         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1168         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1169         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1170         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1171         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1172         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1173         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1174         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1175         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1176         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1177         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1178         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1179         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1180         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1181         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1182         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1183         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1184         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1185         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1186         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1187         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1188         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1189         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1190         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1191         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1192         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1193         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1194         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1195         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1196         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1197         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1198         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1199         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1200         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1201         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1202         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1203         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1204         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1205         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1206         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1207         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1208         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1209         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1210         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1211         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1212         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1213         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1214         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1215         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1216         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1217         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1218         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1219         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1220         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1221         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1222         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1223         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1224         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1225         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1226         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1227         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1228         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1229         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1230         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1231         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1232         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1233         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
1234         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1235         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1236         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1237         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1238         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1239         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1240         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1241         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1242         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1243         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1244         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1245         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1246         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1247         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1248         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1249         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1250         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1251
1252         default:
1253                 /* Compressed formats */
1254                 flags = V4L2_FMT_FLAG_COMPRESSED;
1255                 switch (fmt->pixelformat) {
1256                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1257                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1258                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1259                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1260                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1261                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1262                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1263                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1264                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1265                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1266                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1267                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1268                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1269                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1270                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1271                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1272                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1273                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1274                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1275                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1276                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1277                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1278                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1279                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1280                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1281                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1282                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1283                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1284                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1285                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1286                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1287                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1288                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1289                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1290                 default:
1291                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1292                         if (fmt->description[0])
1293                                 return;
1294                         flags = 0;
1295                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1296                                         (char)(fmt->pixelformat & 0x7f),
1297                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1298                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1299                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1300                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1301                         break;
1302                 }
1303         }
1304
1305         if (descr)
1306                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1307         fmt->flags = flags;
1308 }
1309
1310 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1311                                 struct file *file, void *fh, void *arg)
1312 {
1313         struct v4l2_fmtdesc *p = arg;
1314         struct video_device *vfd = video_devdata(file);
1315         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1316         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1317         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1318         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1319         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1320         int ret = -EINVAL;
1321
1322         switch (p->type) {
1323         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1324                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
1325                         break;
1326                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1327                 break;
1328         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1329                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1330                         break;
1331                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1332                 break;
1333         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1334                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1335                         break;
1336                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1337                 break;
1338         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1339                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1340                         break;
1341                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1342                 break;
1343         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1344                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1345                         break;
1346                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1347                 break;
1348         case V4L2_BUF_TYPE_SDR_CAPTURE:
1349                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1350                         break;
1351                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1352                 break;
1353         case V4L2_BUF_TYPE_SDR_OUTPUT:
1354                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1355                         break;
1356                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1357                 break;
1358         }
1359         if (ret == 0)
1360                 v4l_fill_fmtdesc(p);
1361         return ret;
1362 }
1363
1364 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1365                                 struct file *file, void *fh, void *arg)
1366 {
1367         struct v4l2_format *p = arg;
1368         struct video_device *vfd = video_devdata(file);
1369         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1370         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1371         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1372         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1373         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1374         int ret;
1375
1376         /*
1377          * fmt can't be cleared for these overlay types due to the 'clips'
1378          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1379          * Those are provided by the user. So handle these two overlay types
1380          * first, and then just do a simple memset for the other types.
1381          */
1382         switch (p->type) {
1383         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1384         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1385                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1386                 u32 clipcount = p->fmt.win.clipcount;
1387                 void __user *bitmap = p->fmt.win.bitmap;
1388
1389                 memset(&p->fmt, 0, sizeof(p->fmt));
1390                 p->fmt.win.clips = clips;
1391                 p->fmt.win.clipcount = clipcount;
1392                 p->fmt.win.bitmap = bitmap;
1393                 break;
1394         }
1395         default:
1396                 memset(&p->fmt, 0, sizeof(p->fmt));
1397                 break;
1398         }
1399
1400         switch (p->type) {
1401         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1402                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
1403                         break;
1404                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1405                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1406                 /* just in case the driver zeroed it again */
1407                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1408                 return ret;
1409         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1410                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1411                         break;
1412                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1413         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1414                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1415                         break;
1416                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1417         case V4L2_BUF_TYPE_VBI_CAPTURE:
1418                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1419                         break;
1420                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1421         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1422                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1423                         break;
1424                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1425         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1426                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1427                         break;
1428                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1429                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1430                 /* just in case the driver zeroed it again */
1431                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1432                 return ret;
1433         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1434                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1435                         break;
1436                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1437         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1438                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1439                         break;
1440                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1441         case V4L2_BUF_TYPE_VBI_OUTPUT:
1442                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1443                         break;
1444                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1445         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1446                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1447                         break;
1448                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1449         case V4L2_BUF_TYPE_SDR_CAPTURE:
1450                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1451                         break;
1452                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1453         case V4L2_BUF_TYPE_SDR_OUTPUT:
1454                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1455                         break;
1456                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1457         }
1458         return -EINVAL;
1459 }
1460
1461 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1462 {
1463         /*
1464          * The v4l2_pix_format structure contains fields that make no sense for
1465          * touch. Set them to default values in this case.
1466          */
1467
1468         p->field = V4L2_FIELD_NONE;
1469         p->colorspace = V4L2_COLORSPACE_RAW;
1470         p->flags = 0;
1471         p->ycbcr_enc = 0;
1472         p->quantization = 0;
1473         p->xfer_func = 0;
1474 }
1475
1476 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1477                                 struct file *file, void *fh, void *arg)
1478 {
1479         struct v4l2_format *p = arg;
1480         struct video_device *vfd = video_devdata(file);
1481         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1482         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1483         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1484         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1485         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1486         int ret;
1487
1488         ret = v4l_enable_media_source(vfd);
1489         if (ret)
1490                 return ret;
1491         v4l_sanitize_format(p);
1492
1493         switch (p->type) {
1494         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1495                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
1496                         break;
1497                 CLEAR_AFTER_FIELD(p, fmt.pix);
1498                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1499                 /* just in case the driver zeroed it again */
1500                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1501                 if (is_tch)
1502                         v4l_pix_format_touch(&p->fmt.pix);
1503                 return ret;
1504         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1505                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1506                         break;
1507                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1508                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1509         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1510                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1511                         break;
1512                 CLEAR_AFTER_FIELD(p, fmt.win);
1513                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1514         case V4L2_BUF_TYPE_VBI_CAPTURE:
1515                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1516                         break;
1517                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1518                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1519         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1520                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1521                         break;
1522                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1523                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1524         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1525                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1526                         break;
1527                 CLEAR_AFTER_FIELD(p, fmt.pix);
1528                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1529                 /* just in case the driver zeroed it again */
1530                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1531                 return ret;
1532         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1533                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1534                         break;
1535                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1536                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1537         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1538                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1539                         break;
1540                 CLEAR_AFTER_FIELD(p, fmt.win);
1541                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1542         case V4L2_BUF_TYPE_VBI_OUTPUT:
1543                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1544                         break;
1545                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1546                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1547         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1548                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1549                         break;
1550                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1551                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1552         case V4L2_BUF_TYPE_SDR_CAPTURE:
1553                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1554                         break;
1555                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1556                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1557         case V4L2_BUF_TYPE_SDR_OUTPUT:
1558                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1559                         break;
1560                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1561                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1562         }
1563         return -EINVAL;
1564 }
1565
1566 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1567                                 struct file *file, void *fh, void *arg)
1568 {
1569         struct v4l2_format *p = arg;
1570         struct video_device *vfd = video_devdata(file);
1571         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1572         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1573         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1574         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1575         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1576         int ret;
1577
1578         v4l_sanitize_format(p);
1579
1580         switch (p->type) {
1581         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1582                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap))
1583                         break;
1584                 CLEAR_AFTER_FIELD(p, fmt.pix);
1585                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1586                 /* just in case the driver zeroed it again */
1587                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1588                 return ret;
1589         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1590                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1591                         break;
1592                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1593                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1594         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1595                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1596                         break;
1597                 CLEAR_AFTER_FIELD(p, fmt.win);
1598                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1599         case V4L2_BUF_TYPE_VBI_CAPTURE:
1600                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1601                         break;
1602                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1603                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1604         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1605                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1606                         break;
1607                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1608                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1609         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1610                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1611                         break;
1612                 CLEAR_AFTER_FIELD(p, fmt.pix);
1613                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1614                 /* just in case the driver zeroed it again */
1615                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1616                 return ret;
1617         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1618                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1619                         break;
1620                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1621                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1622         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1623                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1624                         break;
1625                 CLEAR_AFTER_FIELD(p, fmt.win);
1626                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1627         case V4L2_BUF_TYPE_VBI_OUTPUT:
1628                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1629                         break;
1630                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1631                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1632         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1633                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1634                         break;
1635                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1636                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1637         case V4L2_BUF_TYPE_SDR_CAPTURE:
1638                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1639                         break;
1640                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1641                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1642         case V4L2_BUF_TYPE_SDR_OUTPUT:
1643                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1644                         break;
1645                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1646                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1647         }
1648         return -EINVAL;
1649 }
1650
1651 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1652                                 struct file *file, void *fh, void *arg)
1653 {
1654         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1655 }
1656
1657 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1658                                 struct file *file, void *fh, void *arg)
1659 {
1660         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1661 }
1662
1663 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1664                                 struct file *file, void *fh, void *arg)
1665 {
1666         struct video_device *vfd = video_devdata(file);
1667         struct v4l2_tuner *p = arg;
1668         int err;
1669
1670         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1671                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1672         err = ops->vidioc_g_tuner(file, fh, p);
1673         if (!err)
1674                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1675         return err;
1676 }
1677
1678 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1679                                 struct file *file, void *fh, void *arg)
1680 {
1681         struct video_device *vfd = video_devdata(file);
1682         struct v4l2_tuner *p = arg;
1683         int ret;
1684
1685         ret = v4l_enable_media_source(vfd);
1686         if (ret)
1687                 return ret;
1688         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1689                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1690         return ops->vidioc_s_tuner(file, fh, p);
1691 }
1692
1693 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1694                                 struct file *file, void *fh, void *arg)
1695 {
1696         struct video_device *vfd = video_devdata(file);
1697         struct v4l2_modulator *p = arg;
1698         int err;
1699
1700         if (vfd->vfl_type == VFL_TYPE_RADIO)
1701                 p->type = V4L2_TUNER_RADIO;
1702
1703         err = ops->vidioc_g_modulator(file, fh, p);
1704         if (!err)
1705                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1706         return err;
1707 }
1708
1709 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1710                                 struct file *file, void *fh, void *arg)
1711 {
1712         struct video_device *vfd = video_devdata(file);
1713         struct v4l2_modulator *p = arg;
1714
1715         if (vfd->vfl_type == VFL_TYPE_RADIO)
1716                 p->type = V4L2_TUNER_RADIO;
1717
1718         return ops->vidioc_s_modulator(file, fh, p);
1719 }
1720
1721 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1722                                 struct file *file, void *fh, void *arg)
1723 {
1724         struct video_device *vfd = video_devdata(file);
1725         struct v4l2_frequency *p = arg;
1726
1727         if (vfd->vfl_type == VFL_TYPE_SDR)
1728                 p->type = V4L2_TUNER_SDR;
1729         else
1730                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1731                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1732         return ops->vidioc_g_frequency(file, fh, p);
1733 }
1734
1735 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1736                                 struct file *file, void *fh, void *arg)
1737 {
1738         struct video_device *vfd = video_devdata(file);
1739         const struct v4l2_frequency *p = arg;
1740         enum v4l2_tuner_type type;
1741         int ret;
1742
1743         ret = v4l_enable_media_source(vfd);
1744         if (ret)
1745                 return ret;
1746         if (vfd->vfl_type == VFL_TYPE_SDR) {
1747                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1748                         return -EINVAL;
1749         } else {
1750                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1751                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1752                 if (type != p->type)
1753                         return -EINVAL;
1754         }
1755         return ops->vidioc_s_frequency(file, fh, p);
1756 }
1757
1758 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1759                                 struct file *file, void *fh, void *arg)
1760 {
1761         struct video_device *vfd = video_devdata(file);
1762         struct v4l2_standard *p = arg;
1763         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1764         unsigned int index = p->index, i, j = 0;
1765         const char *descr = "";
1766
1767         /* Return -ENODATA if the tvnorms for the current input
1768            or output is 0, meaning that it doesn't support this API. */
1769         if (id == 0)
1770                 return -ENODATA;
1771
1772         /* Return norm array in a canonical way */
1773         for (i = 0; i <= index && id; i++) {
1774                 /* last std value in the standards array is 0, so this
1775                    while always ends there since (id & 0) == 0. */
1776                 while ((id & standards[j].std) != standards[j].std)
1777                         j++;
1778                 curr_id = standards[j].std;
1779                 descr = standards[j].descr;
1780                 j++;
1781                 if (curr_id == 0)
1782                         break;
1783                 if (curr_id != V4L2_STD_PAL &&
1784                                 curr_id != V4L2_STD_SECAM &&
1785                                 curr_id != V4L2_STD_NTSC)
1786                         id &= ~curr_id;
1787         }
1788         if (i <= index)
1789                 return -EINVAL;
1790
1791         v4l2_video_std_construct(p, curr_id, descr);
1792         return 0;
1793 }
1794
1795 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1796                                 struct file *file, void *fh, void *arg)
1797 {
1798         struct video_device *vfd = video_devdata(file);
1799         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1800         int ret;
1801
1802         ret = v4l_enable_media_source(vfd);
1803         if (ret)
1804                 return ret;
1805         norm = id & vfd->tvnorms;
1806         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1807                 return -EINVAL;
1808
1809         /* Calls the specific handler */
1810         return ops->vidioc_s_std(file, fh, norm);
1811 }
1812
1813 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1814                                 struct file *file, void *fh, void *arg)
1815 {
1816         struct video_device *vfd = video_devdata(file);
1817         v4l2_std_id *p = arg;
1818         int ret;
1819
1820         ret = v4l_enable_media_source(vfd);
1821         if (ret)
1822                 return ret;
1823         /*
1824          * If no signal is detected, then the driver should return
1825          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1826          * any standards that do not apply removed.
1827          *
1828          * This means that tuners, audio and video decoders can join
1829          * their efforts to improve the standards detection.
1830          */
1831         *p = vfd->tvnorms;
1832         return ops->vidioc_querystd(file, fh, arg);
1833 }
1834
1835 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1836                                 struct file *file, void *fh, void *arg)
1837 {
1838         struct video_device *vfd = video_devdata(file);
1839         struct v4l2_hw_freq_seek *p = arg;
1840         enum v4l2_tuner_type type;
1841         int ret;
1842
1843         ret = v4l_enable_media_source(vfd);
1844         if (ret)
1845                 return ret;
1846         /* s_hw_freq_seek is not supported for SDR for now */
1847         if (vfd->vfl_type == VFL_TYPE_SDR)
1848                 return -EINVAL;
1849
1850         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1851                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1852         if (p->type != type)
1853                 return -EINVAL;
1854         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1855 }
1856
1857 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1858                                 struct file *file, void *fh, void *arg)
1859 {
1860         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1861 }
1862
1863 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1864                                 struct file *file, void *fh, void *arg)
1865 {
1866         struct v4l2_requestbuffers *p = arg;
1867         int ret = check_fmt(file, p->type);
1868
1869         if (ret)
1870                 return ret;
1871
1872         CLEAR_AFTER_FIELD(p, memory);
1873
1874         return ops->vidioc_reqbufs(file, fh, p);
1875 }
1876
1877 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1878                                 struct file *file, void *fh, void *arg)
1879 {
1880         struct v4l2_buffer *p = arg;
1881         int ret = check_fmt(file, p->type);
1882
1883         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1884 }
1885
1886 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1887                                 struct file *file, void *fh, void *arg)
1888 {
1889         struct v4l2_buffer *p = arg;
1890         int ret = check_fmt(file, p->type);
1891
1892         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1893 }
1894
1895 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1896                                 struct file *file, void *fh, void *arg)
1897 {
1898         struct v4l2_buffer *p = arg;
1899         int ret = check_fmt(file, p->type);
1900
1901         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1902 }
1903
1904 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1905                                 struct file *file, void *fh, void *arg)
1906 {
1907         struct v4l2_create_buffers *create = arg;
1908         int ret = check_fmt(file, create->format.type);
1909
1910         if (ret)
1911                 return ret;
1912
1913         CLEAR_AFTER_FIELD(create, format);
1914
1915         v4l_sanitize_format(&create->format);
1916
1917         ret = ops->vidioc_create_bufs(file, fh, create);
1918
1919         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1920             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1921                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1922
1923         return ret;
1924 }
1925
1926 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1927                                 struct file *file, void *fh, void *arg)
1928 {
1929         struct v4l2_buffer *b = arg;
1930         int ret = check_fmt(file, b->type);
1931
1932         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1933 }
1934
1935 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1936                                 struct file *file, void *fh, void *arg)
1937 {
1938         struct v4l2_streamparm *p = arg;
1939         v4l2_std_id std;
1940         int ret = check_fmt(file, p->type);
1941
1942         if (ret)
1943                 return ret;
1944         if (ops->vidioc_g_parm)
1945                 return ops->vidioc_g_parm(file, fh, p);
1946         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1947             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1948                 return -EINVAL;
1949         p->parm.capture.readbuffers = 2;
1950         ret = ops->vidioc_g_std(file, fh, &std);
1951         if (ret == 0)
1952                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1953         return ret;
1954 }
1955
1956 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1957                                 struct file *file, void *fh, void *arg)
1958 {
1959         struct v4l2_streamparm *p = arg;
1960         int ret = check_fmt(file, p->type);
1961
1962         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1963 }
1964
1965 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1966                                 struct file *file, void *fh, void *arg)
1967 {
1968         struct video_device *vfd = video_devdata(file);
1969         struct v4l2_queryctrl *p = arg;
1970         struct v4l2_fh *vfh =
1971                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1972
1973         if (vfh && vfh->ctrl_handler)
1974                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1975         if (vfd->ctrl_handler)
1976                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1977         if (ops->vidioc_queryctrl)
1978                 return ops->vidioc_queryctrl(file, fh, p);
1979         return -ENOTTY;
1980 }
1981
1982 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1983                                 struct file *file, void *fh, void *arg)
1984 {
1985         struct video_device *vfd = video_devdata(file);
1986         struct v4l2_query_ext_ctrl *p = arg;
1987         struct v4l2_fh *vfh =
1988                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1989
1990         if (vfh && vfh->ctrl_handler)
1991                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1992         if (vfd->ctrl_handler)
1993                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1994         if (ops->vidioc_query_ext_ctrl)
1995                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1996         return -ENOTTY;
1997 }
1998
1999 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2000                                 struct file *file, void *fh, void *arg)
2001 {
2002         struct video_device *vfd = video_devdata(file);
2003         struct v4l2_querymenu *p = arg;
2004         struct v4l2_fh *vfh =
2005                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2006
2007         if (vfh && vfh->ctrl_handler)
2008                 return v4l2_querymenu(vfh->ctrl_handler, p);
2009         if (vfd->ctrl_handler)
2010                 return v4l2_querymenu(vfd->ctrl_handler, p);
2011         if (ops->vidioc_querymenu)
2012                 return ops->vidioc_querymenu(file, fh, p);
2013         return -ENOTTY;
2014 }
2015
2016 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2017                                 struct file *file, void *fh, void *arg)
2018 {
2019         struct video_device *vfd = video_devdata(file);
2020         struct v4l2_control *p = arg;
2021         struct v4l2_fh *vfh =
2022                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2023         struct v4l2_ext_controls ctrls;
2024         struct v4l2_ext_control ctrl;
2025
2026         if (vfh && vfh->ctrl_handler)
2027                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2028         if (vfd->ctrl_handler)
2029                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2030         if (ops->vidioc_g_ctrl)
2031                 return ops->vidioc_g_ctrl(file, fh, p);
2032         if (ops->vidioc_g_ext_ctrls == NULL)
2033                 return -ENOTTY;
2034
2035         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2036         ctrls.count = 1;
2037         ctrls.controls = &ctrl;
2038         ctrl.id = p->id;
2039         ctrl.value = p->value;
2040         if (check_ext_ctrls(&ctrls, 1)) {
2041                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2042
2043                 if (ret == 0)
2044                         p->value = ctrl.value;
2045                 return ret;
2046         }
2047         return -EINVAL;
2048 }
2049
2050 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2051                                 struct file *file, void *fh, void *arg)
2052 {
2053         struct video_device *vfd = video_devdata(file);
2054         struct v4l2_control *p = arg;
2055         struct v4l2_fh *vfh =
2056                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2057         struct v4l2_ext_controls ctrls;
2058         struct v4l2_ext_control ctrl;
2059
2060         if (vfh && vfh->ctrl_handler)
2061                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2062         if (vfd->ctrl_handler)
2063                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2064         if (ops->vidioc_s_ctrl)
2065                 return ops->vidioc_s_ctrl(file, fh, p);
2066         if (ops->vidioc_s_ext_ctrls == NULL)
2067                 return -ENOTTY;
2068
2069         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2070         ctrls.count = 1;
2071         ctrls.controls = &ctrl;
2072         ctrl.id = p->id;
2073         ctrl.value = p->value;
2074         if (check_ext_ctrls(&ctrls, 1))
2075                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2076         return -EINVAL;
2077 }
2078
2079 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2080                                 struct file *file, void *fh, void *arg)
2081 {
2082         struct video_device *vfd = video_devdata(file);
2083         struct v4l2_ext_controls *p = arg;
2084         struct v4l2_fh *vfh =
2085                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2086
2087         p->error_idx = p->count;
2088         if (vfh && vfh->ctrl_handler)
2089                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2090         if (vfd->ctrl_handler)
2091                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2092         if (ops->vidioc_g_ext_ctrls == NULL)
2093                 return -ENOTTY;
2094         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2095                                         -EINVAL;
2096 }
2097
2098 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2099                                 struct file *file, void *fh, void *arg)
2100 {
2101         struct video_device *vfd = video_devdata(file);
2102         struct v4l2_ext_controls *p = arg;
2103         struct v4l2_fh *vfh =
2104                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2105
2106         p->error_idx = p->count;
2107         if (vfh && vfh->ctrl_handler)
2108                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2109         if (vfd->ctrl_handler)
2110                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2111         if (ops->vidioc_s_ext_ctrls == NULL)
2112                 return -ENOTTY;
2113         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2114                                         -EINVAL;
2115 }
2116
2117 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2118                                 struct file *file, void *fh, void *arg)
2119 {
2120         struct video_device *vfd = video_devdata(file);
2121         struct v4l2_ext_controls *p = arg;
2122         struct v4l2_fh *vfh =
2123                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2124
2125         p->error_idx = p->count;
2126         if (vfh && vfh->ctrl_handler)
2127                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2128         if (vfd->ctrl_handler)
2129                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2130         if (ops->vidioc_try_ext_ctrls == NULL)
2131                 return -ENOTTY;
2132         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2133                                         -EINVAL;
2134 }
2135
2136 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2137                                 struct file *file, void *fh, void *arg)
2138 {
2139         struct v4l2_crop *p = arg;
2140         struct v4l2_selection s = {
2141                 .type = p->type,
2142         };
2143         int ret;
2144
2145         if (ops->vidioc_g_crop)
2146                 return ops->vidioc_g_crop(file, fh, p);
2147         /* simulate capture crop using selection api */
2148
2149         /* crop means compose for output devices */
2150         if (V4L2_TYPE_IS_OUTPUT(p->type))
2151                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2152         else
2153                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2154
2155         ret = ops->vidioc_g_selection(file, fh, &s);
2156
2157         /* copying results to old structure on success */
2158         if (!ret)
2159                 p->c = s.r;
2160         return ret;
2161 }
2162
2163 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2164                                 struct file *file, void *fh, void *arg)
2165 {
2166         struct v4l2_crop *p = arg;
2167         struct v4l2_selection s = {
2168                 .type = p->type,
2169                 .r = p->c,
2170         };
2171
2172         if (ops->vidioc_s_crop)
2173                 return ops->vidioc_s_crop(file, fh, p);
2174         /* simulate capture crop using selection api */
2175
2176         /* crop means compose for output devices */
2177         if (V4L2_TYPE_IS_OUTPUT(p->type))
2178                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2179         else
2180                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2181
2182         return ops->vidioc_s_selection(file, fh, &s);
2183 }
2184
2185 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2186                                 struct file *file, void *fh, void *arg)
2187 {
2188         struct v4l2_cropcap *p = arg;
2189         struct v4l2_selection s = { .type = p->type };
2190         int ret = 0;
2191
2192         /* setting trivial pixelaspect */
2193         p->pixelaspect.numerator = 1;
2194         p->pixelaspect.denominator = 1;
2195
2196         /*
2197          * The determine_valid_ioctls() call already should ensure
2198          * that this can never happen, but just in case...
2199          */
2200         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2201                 return -ENOTTY;
2202
2203         if (ops->vidioc_cropcap)
2204                 ret = ops->vidioc_cropcap(file, fh, p);
2205
2206         if (!ops->vidioc_g_selection)
2207                 return ret;
2208
2209         /*
2210          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2211          * square pixel aspect ratio in that case.
2212          */
2213         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2214                 return ret;
2215
2216         /* Use g_selection() to fill in the bounds and defrect rectangles */
2217
2218         /* obtaining bounds */
2219         if (V4L2_TYPE_IS_OUTPUT(p->type))
2220                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2221         else
2222                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2223
2224         ret = ops->vidioc_g_selection(file, fh, &s);
2225         if (ret)
2226                 return ret;
2227         p->bounds = s.r;
2228
2229         /* obtaining defrect */
2230         if (V4L2_TYPE_IS_OUTPUT(p->type))
2231                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2232         else
2233                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2234
2235         ret = ops->vidioc_g_selection(file, fh, &s);
2236         if (ret)
2237                 return ret;
2238         p->defrect = s.r;
2239
2240         return 0;
2241 }
2242
2243 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2244                                 struct file *file, void *fh, void *arg)
2245 {
2246         struct video_device *vfd = video_devdata(file);
2247         int ret;
2248
2249         if (vfd->v4l2_dev)
2250                 pr_info("%s: =================  START STATUS  =================\n",
2251                         vfd->v4l2_dev->name);
2252         ret = ops->vidioc_log_status(file, fh);
2253         if (vfd->v4l2_dev)
2254                 pr_info("%s: ==================  END STATUS  ==================\n",
2255                         vfd->v4l2_dev->name);
2256         return ret;
2257 }
2258
2259 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2260                                 struct file *file, void *fh, void *arg)
2261 {
2262 #ifdef CONFIG_VIDEO_ADV_DEBUG
2263         struct v4l2_dbg_register *p = arg;
2264         struct video_device *vfd = video_devdata(file);
2265         struct v4l2_subdev *sd;
2266         int idx = 0;
2267
2268         if (!capable(CAP_SYS_ADMIN))
2269                 return -EPERM;
2270         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2271                 if (vfd->v4l2_dev == NULL)
2272                         return -EINVAL;
2273                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2274                         if (p->match.addr == idx++)
2275                                 return v4l2_subdev_call(sd, core, g_register, p);
2276                 return -EINVAL;
2277         }
2278         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2279             (ops->vidioc_g_chip_info || p->match.addr == 0))
2280                 return ops->vidioc_g_register(file, fh, p);
2281         return -EINVAL;
2282 #else
2283         return -ENOTTY;
2284 #endif
2285 }
2286
2287 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2288                                 struct file *file, void *fh, void *arg)
2289 {
2290 #ifdef CONFIG_VIDEO_ADV_DEBUG
2291         const struct v4l2_dbg_register *p = arg;
2292         struct video_device *vfd = video_devdata(file);
2293         struct v4l2_subdev *sd;
2294         int idx = 0;
2295
2296         if (!capable(CAP_SYS_ADMIN))
2297                 return -EPERM;
2298         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2299                 if (vfd->v4l2_dev == NULL)
2300                         return -EINVAL;
2301                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2302                         if (p->match.addr == idx++)
2303                                 return v4l2_subdev_call(sd, core, s_register, p);
2304                 return -EINVAL;
2305         }
2306         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2307             (ops->vidioc_g_chip_info || p->match.addr == 0))
2308                 return ops->vidioc_s_register(file, fh, p);
2309         return -EINVAL;
2310 #else
2311         return -ENOTTY;
2312 #endif
2313 }
2314
2315 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2316                                 struct file *file, void *fh, void *arg)
2317 {
2318 #ifdef CONFIG_VIDEO_ADV_DEBUG
2319         struct video_device *vfd = video_devdata(file);
2320         struct v4l2_dbg_chip_info *p = arg;
2321         struct v4l2_subdev *sd;
2322         int idx = 0;
2323
2324         switch (p->match.type) {
2325         case V4L2_CHIP_MATCH_BRIDGE:
2326                 if (ops->vidioc_s_register)
2327                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2328                 if (ops->vidioc_g_register)
2329                         p->flags |= V4L2_CHIP_FL_READABLE;
2330                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2331                 if (ops->vidioc_g_chip_info)
2332                         return ops->vidioc_g_chip_info(file, fh, arg);
2333                 if (p->match.addr)
2334                         return -EINVAL;
2335                 return 0;
2336
2337         case V4L2_CHIP_MATCH_SUBDEV:
2338                 if (vfd->v4l2_dev == NULL)
2339                         break;
2340                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2341                         if (p->match.addr != idx++)
2342                                 continue;
2343                         if (sd->ops->core && sd->ops->core->s_register)
2344                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2345                         if (sd->ops->core && sd->ops->core->g_register)
2346                                 p->flags |= V4L2_CHIP_FL_READABLE;
2347                         strlcpy(p->name, sd->name, sizeof(p->name));
2348                         return 0;
2349                 }
2350                 break;
2351         }
2352         return -EINVAL;
2353 #else
2354         return -ENOTTY;
2355 #endif
2356 }
2357
2358 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2359                                 struct file *file, void *fh, void *arg)
2360 {
2361         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2362 }
2363
2364 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2365                                 struct file *file, void *fh, void *arg)
2366 {
2367         return ops->vidioc_subscribe_event(fh, arg);
2368 }
2369
2370 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2371                                 struct file *file, void *fh, void *arg)
2372 {
2373         return ops->vidioc_unsubscribe_event(fh, arg);
2374 }
2375
2376 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2377                                 struct file *file, void *fh, void *arg)
2378 {
2379         struct v4l2_sliced_vbi_cap *p = arg;
2380         int ret = check_fmt(file, p->type);
2381
2382         if (ret)
2383                 return ret;
2384
2385         /* Clear up to type, everything after type is zeroed already */
2386         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2387
2388         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2389 }
2390
2391 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2392                                 struct file *file, void *fh, void *arg)
2393 {
2394         struct video_device *vfd = video_devdata(file);
2395         struct v4l2_frequency_band *p = arg;
2396         enum v4l2_tuner_type type;
2397         int err;
2398
2399         if (vfd->vfl_type == VFL_TYPE_SDR) {
2400                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2401                         return -EINVAL;
2402                 type = p->type;
2403         } else {
2404                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2405                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2406                 if (type != p->type)
2407                         return -EINVAL;
2408         }
2409         if (ops->vidioc_enum_freq_bands) {
2410                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2411                 if (err != -ENOTTY)
2412                         return err;
2413         }
2414         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2415                 struct v4l2_tuner t = {
2416                         .index = p->tuner,
2417                         .type = type,
2418                 };
2419
2420                 if (p->index)
2421                         return -EINVAL;
2422                 err = ops->vidioc_g_tuner(file, fh, &t);
2423                 if (err)
2424                         return err;
2425                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2426                 p->rangelow = t.rangelow;
2427                 p->rangehigh = t.rangehigh;
2428                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2429                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2430                 return 0;
2431         }
2432         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2433                 struct v4l2_modulator m = {
2434                         .index = p->tuner,
2435                 };
2436
2437                 if (type != V4L2_TUNER_RADIO)
2438                         return -EINVAL;
2439                 if (p->index)
2440                         return -EINVAL;
2441                 err = ops->vidioc_g_modulator(file, fh, &m);
2442                 if (err)
2443                         return err;
2444                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2445                 p->rangelow = m.rangelow;
2446                 p->rangehigh = m.rangehigh;
2447                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2448                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2449                 return 0;
2450         }
2451         return -ENOTTY;
2452 }
2453
2454 struct v4l2_ioctl_info {
2455         unsigned int ioctl;
2456         u32 flags;
2457         const char * const name;
2458         union {
2459                 u32 offset;
2460                 int (*func)(const struct v4l2_ioctl_ops *ops,
2461                                 struct file *file, void *fh, void *p);
2462         } u;
2463         void (*debug)(const void *arg, bool write_only);
2464 };
2465
2466 /* This control needs a priority check */
2467 #define INFO_FL_PRIO    (1 << 0)
2468 /* This control can be valid if the filehandle passes a control handler. */
2469 #define INFO_FL_CTRL    (1 << 1)
2470 /* This is a standard ioctl, no need for special code */
2471 #define INFO_FL_STD     (1 << 2)
2472 /* This is ioctl has its own function */
2473 #define INFO_FL_FUNC    (1 << 3)
2474 /* Queuing ioctl */
2475 #define INFO_FL_QUEUE   (1 << 4)
2476 /* Zero struct from after the field to the end */
2477 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2478         ((offsetof(struct v4l2_struct, field) +                 \
2479           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2480 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2481
2482 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2483         [_IOC_NR(_ioctl)] = {                                           \
2484                 .ioctl = _ioctl,                                        \
2485                 .flags = _flags | INFO_FL_STD,                          \
2486                 .name = #_ioctl,                                        \
2487                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2488                 .debug = _debug,                                        \
2489         }
2490
2491 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2492         [_IOC_NR(_ioctl)] = {                                           \
2493                 .ioctl = _ioctl,                                        \
2494                 .flags = _flags | INFO_FL_FUNC,                         \
2495                 .name = #_ioctl,                                        \
2496                 .u.func = _func,                                        \
2497                 .debug = _debug,                                        \
2498         }
2499
2500 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2501         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2502         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2503         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2504         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2505         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2506         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2507         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2508         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2509         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2510         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2511         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2512         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2513         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2514         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2515         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2516         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2517         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2518         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2519         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2520         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2521         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2522         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2523         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2524         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2525         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2526         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2527         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2528         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2529         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2530         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2531         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2532         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2533         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2534         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2535         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2536         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2537         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2538         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2539         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2540         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2541         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2542         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2543         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2544         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2545         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2546         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2547         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2548         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2549         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2550         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2551         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2552         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2553         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2554         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2555         IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2556         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2557         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2558         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2559         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2560         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2561         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2562         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2563         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2564         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2565         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2566         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2567         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2568         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2569         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2570         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2571         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2572         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2573         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2574         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2575         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2576         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2577         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2578         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2579         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2580         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2581         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2582         IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2583 };
2584 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2585
2586 bool v4l2_is_known_ioctl(unsigned int cmd)
2587 {
2588         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2589                 return false;
2590         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2591 }
2592
2593 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2594 {
2595         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2596                 return vdev->lock;
2597         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2598                 return NULL;
2599         if (vdev->queue && vdev->queue->lock &&
2600                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2601                 return vdev->queue->lock;
2602         return vdev->lock;
2603 }
2604
2605 /* Common ioctl debug function. This function can be used by
2606    external ioctl messages as well as internal V4L ioctl */
2607 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2608 {
2609         const char *dir, *type;
2610
2611         if (prefix)
2612                 printk(KERN_DEBUG "%s: ", prefix);
2613
2614         switch (_IOC_TYPE(cmd)) {
2615         case 'd':
2616                 type = "v4l2_int";
2617                 break;
2618         case 'V':
2619                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2620                         type = "v4l2";
2621                         break;
2622                 }
2623                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2624                 return;
2625         default:
2626                 type = "unknown";
2627                 break;
2628         }
2629
2630         switch (_IOC_DIR(cmd)) {
2631         case _IOC_NONE:              dir = "--"; break;
2632         case _IOC_READ:              dir = "r-"; break;
2633         case _IOC_WRITE:             dir = "-w"; break;
2634         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2635         default:                     dir = "*ERR*"; break;
2636         }
2637         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2638                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2639 }
2640 EXPORT_SYMBOL(v4l_printk_ioctl);
2641
2642 static long __video_do_ioctl(struct file *file,
2643                 unsigned int cmd, void *arg)
2644 {
2645         struct video_device *vfd = video_devdata(file);
2646         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2647         bool write_only = false;
2648         struct v4l2_ioctl_info default_info;
2649         const struct v4l2_ioctl_info *info;
2650         void *fh = file->private_data;
2651         struct v4l2_fh *vfh = NULL;
2652         int dev_debug = vfd->dev_debug;
2653         long ret = -ENOTTY;
2654
2655         if (ops == NULL) {
2656                 pr_warn("%s: has no ioctl_ops.\n",
2657                                 video_device_node_name(vfd));
2658                 return ret;
2659         }
2660
2661         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2662                 vfh = file->private_data;
2663
2664         if (v4l2_is_known_ioctl(cmd)) {
2665                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2666
2667                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2668                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2669                         goto done;
2670
2671                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2672                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2673                         if (ret)
2674                                 goto done;
2675                 }
2676         } else {
2677                 default_info.ioctl = cmd;
2678                 default_info.flags = 0;
2679                 default_info.debug = v4l_print_default;
2680                 info = &default_info;
2681         }
2682
2683         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2684         if (info->flags & INFO_FL_STD) {
2685                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2686                 const void *p = vfd->ioctl_ops;
2687                 const vidioc_op *vidioc = p + info->u.offset;
2688
2689                 ret = (*vidioc)(file, fh, arg);
2690         } else if (info->flags & INFO_FL_FUNC) {
2691                 ret = info->u.func(ops, file, fh, arg);
2692         } else if (!ops->vidioc_default) {
2693                 ret = -ENOTTY;
2694         } else {
2695                 ret = ops->vidioc_default(file, fh,
2696                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2697                         cmd, arg);
2698         }
2699
2700 done:
2701         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2702                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2703                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2704                         return ret;
2705
2706                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2707                 if (ret < 0)
2708                         pr_cont(": error %ld", ret);
2709                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2710                         pr_cont("\n");
2711                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2712                         info->debug(arg, write_only);
2713                 else {
2714                         pr_cont(": ");
2715                         info->debug(arg, write_only);
2716                 }
2717         }
2718
2719         return ret;
2720 }
2721
2722 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2723                             void __user **user_ptr, void ***kernel_ptr)
2724 {
2725         int ret = 0;
2726
2727         switch (cmd) {
2728         case VIDIOC_PREPARE_BUF:
2729         case VIDIOC_QUERYBUF:
2730         case VIDIOC_QBUF:
2731         case VIDIOC_DQBUF: {
2732                 struct v4l2_buffer *buf = parg;
2733
2734                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2735                         if (buf->length > VIDEO_MAX_PLANES) {
2736                                 ret = -EINVAL;
2737                                 break;
2738                         }
2739                         *user_ptr = (void __user *)buf->m.planes;
2740                         *kernel_ptr = (void **)&buf->m.planes;
2741                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2742                         ret = 1;
2743                 }
2744                 break;
2745         }
2746
2747         case VIDIOC_G_EDID:
2748         case VIDIOC_S_EDID: {
2749                 struct v4l2_edid *edid = parg;
2750
2751                 if (edid->blocks) {
2752                         if (edid->blocks > 256) {
2753                                 ret = -EINVAL;
2754                                 break;
2755                         }
2756                         *user_ptr = (void __user *)edid->edid;
2757                         *kernel_ptr = (void **)&edid->edid;
2758                         *array_size = edid->blocks * 128;
2759                         ret = 1;
2760                 }
2761                 break;
2762         }
2763
2764         case VIDIOC_S_EXT_CTRLS:
2765         case VIDIOC_G_EXT_CTRLS:
2766         case VIDIOC_TRY_EXT_CTRLS: {
2767                 struct v4l2_ext_controls *ctrls = parg;
2768
2769                 if (ctrls->count != 0) {
2770                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2771                                 ret = -EINVAL;
2772                                 break;
2773                         }
2774                         *user_ptr = (void __user *)ctrls->controls;
2775                         *kernel_ptr = (void **)&ctrls->controls;
2776                         *array_size = sizeof(struct v4l2_ext_control)
2777                                     * ctrls->count;
2778                         ret = 1;
2779                 }
2780                 break;
2781         }
2782         }
2783
2784         return ret;
2785 }
2786
2787 long
2788 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2789                v4l2_kioctl func)
2790 {
2791         char    sbuf[128];
2792         void    *mbuf = NULL;
2793         void    *parg = (void *)arg;
2794         long    err  = -EINVAL;
2795         bool    has_array_args;
2796         size_t  array_size = 0;
2797         void __user *user_ptr = NULL;
2798         void    **kernel_ptr = NULL;
2799
2800         /*  Copy arguments into temp kernel buffer  */
2801         if (_IOC_DIR(cmd) != _IOC_NONE) {
2802                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2803                         parg = sbuf;
2804                 } else {
2805                         /* too big to allocate from stack */
2806                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2807                         if (NULL == mbuf)
2808                                 return -ENOMEM;
2809                         parg = mbuf;
2810                 }
2811
2812                 err = -EFAULT;
2813                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2814                         unsigned int n = _IOC_SIZE(cmd);
2815
2816                         /*
2817                          * In some cases, only a few fields are used as input,
2818                          * i.e. when the app sets "index" and then the driver
2819                          * fills in the rest of the structure for the thing
2820                          * with that index.  We only need to copy up the first
2821                          * non-input field.
2822                          */
2823                         if (v4l2_is_known_ioctl(cmd)) {
2824                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2825                                 if (flags & INFO_FL_CLEAR_MASK)
2826                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2827                         }
2828
2829                         if (copy_from_user(parg, (void __user *)arg, n))
2830                                 goto out;
2831
2832                         /* zero out anything we don't copy from userspace */
2833                         if (n < _IOC_SIZE(cmd))
2834                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2835                 } else {
2836                         /* read-only ioctl */
2837                         memset(parg, 0, _IOC_SIZE(cmd));
2838                 }
2839         }
2840
2841         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2842         if (err < 0)
2843                 goto out;
2844         has_array_args = err;
2845
2846         if (has_array_args) {
2847                 /*
2848                  * When adding new types of array args, make sure that the
2849                  * parent argument to ioctl (which contains the pointer to the
2850                  * array) fits into sbuf (so that mbuf will still remain
2851                  * unused up to here).
2852                  */
2853                 mbuf = kmalloc(array_size, GFP_KERNEL);
2854                 err = -ENOMEM;
2855                 if (NULL == mbuf)
2856                         goto out_array_args;
2857                 err = -EFAULT;
2858                 if (copy_from_user(mbuf, user_ptr, array_size))
2859                         goto out_array_args;
2860                 *kernel_ptr = mbuf;
2861         }
2862
2863         /* Handles IOCTL */
2864         err = func(file, cmd, parg);
2865         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
2866                 err = -ENOTTY;
2867                 goto out;
2868         }
2869
2870         if (err == 0) {
2871                 if (cmd == VIDIOC_DQBUF)
2872                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2873                 else if (cmd == VIDIOC_QBUF)
2874                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2875         }
2876
2877         if (has_array_args) {
2878                 *kernel_ptr = (void __force *)user_ptr;
2879                 if (copy_to_user(user_ptr, mbuf, array_size))
2880                         err = -EFAULT;
2881                 goto out_array_args;
2882         }
2883         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2884            results that must be returned. */
2885         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2886                 goto out;
2887
2888 out_array_args:
2889         /*  Copy results into user buffer  */
2890         switch (_IOC_DIR(cmd)) {
2891         case _IOC_READ:
2892         case (_IOC_WRITE | _IOC_READ):
2893                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2894                         err = -EFAULT;
2895                 break;
2896         }
2897
2898 out:
2899         kfree(mbuf);
2900         return err;
2901 }
2902 EXPORT_SYMBOL(video_usercopy);
2903
2904 long video_ioctl2(struct file *file,
2905                unsigned int cmd, unsigned long arg)
2906 {
2907         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2908 }
2909 EXPORT_SYMBOL(video_ioctl2);