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_rx = vfd->vfl_dir != VFL_DIR_TX;
 928         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 929
 930         if (ops == NULL)
 931                 return -EINVAL;
 932
 933         switch (type) {
 934         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 935                 if (is_vid && is_rx &&
 936                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 937                         return 0;
 938                 break;
 939         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 940                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 941                         return 0;
 942                 break;
 943         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 944                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 945                         return 0;
 946                 break;
 947         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 948                 if (is_vid && is_tx &&
 949                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 950                         return 0;
 951                 break;
 952         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 953                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 954                         return 0;
 955                 break;
 956         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 957                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 958                         return 0;
 959                 break;
 960         case V4L2_BUF_TYPE_VBI_CAPTURE:
 961                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 962                         return 0;
 963                 break;
 964         case V4L2_BUF_TYPE_VBI_OUTPUT:
 965                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 966                         return 0;
 967                 break;
 968         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 969                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 970                         return 0;
 971                 break;
 972         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 973                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 974                         return 0;
 975                 break;
 976         case V4L2_BUF_TYPE_SDR_CAPTURE:
 977                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 978                         return 0;
 979                 break;
 980         case V4L2_BUF_TYPE_SDR_OUTPUT:
 981                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 982                         return 0;
 983                 break;
 984         default:
 985                 break;
 986         }
 987         return -EINVAL;
 988 }
 989
 990 static void v4l_sanitize_format(struct v4l2_format *fmt)
 991 {
 992         unsigned int offset;
 993
 994         /*
 995          * The v4l2_pix_format structure has been extended with fields that were
 996          * not previously required to be set to zero by applications. The priv
 997          * field, when set to a magic value, indicates the the extended fields
 998          * are valid. Otherwise they will contain undefined values. To simplify
 999          * the API towards drivers zero the extended fields and set the priv
1000          * field to the magic value when the extended pixel format structure
1001          * isn't used by applications.
1002          */
1003
1004         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1005             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1006                 return;
1007
1008         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1009                 return;
1010
1011         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1012
1013         offset = offsetof(struct v4l2_pix_format, priv)
1014                + sizeof(fmt->fmt.pix.priv);
1015         memset(((void *)&fmt->fmt.pix) + offset, 0,
1016                sizeof(fmt->fmt.pix) - offset);
1017 }
1018
1019 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1020                                 struct file *file, void *fh, void *arg)
1021 {
1022         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1023         struct video_device *vfd = video_devdata(file);
1024         int ret;
1025
1026         cap->version = LINUX_VERSION_CODE;
1027         cap->device_caps = vfd->device_caps;
1028         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1029
1030         ret = ops->vidioc_querycap(file, fh, cap);
1031
1032         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1033         /*
1034          * Drivers MUST fill in device_caps, so check for this and
1035          * warn if it was forgotten.
1036          */
1037         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1038                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1039                 cap->driver, cap->capabilities, cap->device_caps);
1040         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1041
1042         return ret;
1043 }
1044
1045 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1046                                 struct file *file, void *fh, void *arg)
1047 {
1048         struct video_device *vfd = video_devdata(file);
1049         int ret;
1050
1051         ret = v4l_enable_media_source(vfd);
1052         if (ret)
1053                 return ret;
1054         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1055 }
1056
1057 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1058                                 struct file *file, void *fh, void *arg)
1059 {
1060         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1061 }
1062
1063 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1064                                 struct file *file, void *fh, void *arg)
1065 {
1066         struct video_device *vfd;
1067         u32 *p = arg;
1068
1069         vfd = video_devdata(file);
1070         *p = v4l2_prio_max(vfd->prio);
1071         return 0;
1072 }
1073
1074 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1075                                 struct file *file, void *fh, void *arg)
1076 {
1077         struct video_device *vfd;
1078         struct v4l2_fh *vfh;
1079         u32 *p = arg;
1080
1081         vfd = video_devdata(file);
1082         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1083                 return -ENOTTY;
1084         vfh = file->private_data;
1085         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1086 }
1087
1088 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1089                                 struct file *file, void *fh, void *arg)
1090 {
1091         struct video_device *vfd = video_devdata(file);
1092         struct v4l2_input *p = arg;
1093
1094         /*
1095          * We set the flags for CAP_DV_TIMINGS &
1096          * CAP_STD here based on ioctl handler provided by the
1097          * driver. If the driver doesn't support these
1098          * for a specific input, it must override these flags.
1099          */
1100         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1101                 p->capabilities |= V4L2_IN_CAP_STD;
1102
1103         return ops->vidioc_enum_input(file, fh, p);
1104 }
1105
1106 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1107                                 struct file *file, void *fh, void *arg)
1108 {
1109         struct video_device *vfd = video_devdata(file);
1110         struct v4l2_output *p = arg;
1111
1112         /*
1113          * We set the flags for CAP_DV_TIMINGS &
1114          * CAP_STD here based on ioctl handler provided by the
1115          * driver. If the driver doesn't support these
1116          * for a specific output, it must override these flags.
1117          */
1118         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1119                 p->capabilities |= V4L2_OUT_CAP_STD;
1120
1121         return ops->vidioc_enum_output(file, fh, p);
1122 }
1123
1124 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1125 {
1126         const unsigned sz = sizeof(fmt->description);
1127         const char *descr = NULL;
1128         u32 flags = 0;
1129
1130         /*
1131          * We depart from the normal coding style here since the descriptions
1132          * should be aligned so it is easy to see which descriptions will be
1133          * longer than 31 characters (the max length for a description).
1134          * And frankly, this is easier to read anyway.
1135          *
1136          * Note that gcc will use O(log N) comparisons to find the right case.
1137          */
1138         switch (fmt->pixelformat) {
1139         /* Max description length mask: descr = "0123456789012345678901234567890" */
1140         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1141         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1142         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1143         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1144         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1145         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1146         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1147         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1148         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1149         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1150         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1151         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1152         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1153         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1154         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1155         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1156         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1157         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1158         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1159         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1160         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1161         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1162         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1163         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1164         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1165         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1166         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1167         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1168         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1169         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1170         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1171         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1172         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1173         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1174         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1175         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1176         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1177         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1178         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1179         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1180         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1181         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1182         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1183         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1184         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1185         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1186         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1187         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1188         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1189         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1190         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1191         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1192         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1193         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1194         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1195         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1196         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1197         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1198         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1199         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1200         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1201         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1202         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1203         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1204         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1205         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1206         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1207         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1208         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1209         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1210         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1211         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1212         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1213         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1214         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1215         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1216         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1217         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1218         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1219         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1220         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1221         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1222         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1223         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1224         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1225         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1226         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1227         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1228         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1229         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1230         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1231         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1232         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
1233         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1234         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1235         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1236         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1237         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1238         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1239         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1240         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1241         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1242         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1243         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1244         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1245         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1246
1247         default:
1248                 /* Compressed formats */
1249                 flags = V4L2_FMT_FLAG_COMPRESSED;
1250                 switch (fmt->pixelformat) {
1251                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1252                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1253                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1254                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1255                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1256                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1257                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1258                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1259                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1260                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1261                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1262                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1263                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1264                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1265                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1266                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1267                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1268                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1269                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1270                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1271                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1272                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1273                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1274                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1275                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1276                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1277                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1278                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1279                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1280                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1281                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1282                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1283                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1284                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1285                 default:
1286                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1287                         if (fmt->description[0])
1288                                 return;
1289                         flags = 0;
1290                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1291                                         (char)(fmt->pixelformat & 0x7f),
1292                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1293                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1294                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1295                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1296                         break;
1297                 }
1298         }
1299
1300         if (descr)
1301                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1302         fmt->flags = flags;
1303 }
1304
1305 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1306                                 struct file *file, void *fh, void *arg)
1307 {
1308         struct v4l2_fmtdesc *p = arg;
1309         struct video_device *vfd = video_devdata(file);
1310         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1311         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1312         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1313         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1314         int ret = -EINVAL;
1315
1316         switch (p->type) {
1317         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1318                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1319                         break;
1320                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1321                 break;
1322         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1323                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1324                         break;
1325                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1326                 break;
1327         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1328                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1329                         break;
1330                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1331                 break;
1332         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1333                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1334                         break;
1335                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1336                 break;
1337         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1338                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1339                         break;
1340                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1341                 break;
1342         case V4L2_BUF_TYPE_SDR_CAPTURE:
1343                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1344                         break;
1345                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1346                 break;
1347         case V4L2_BUF_TYPE_SDR_OUTPUT:
1348                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1349                         break;
1350                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1351                 break;
1352         }
1353         if (ret == 0)
1354                 v4l_fill_fmtdesc(p);
1355         return ret;
1356 }
1357
1358 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1359                                 struct file *file, void *fh, void *arg)
1360 {
1361         struct v4l2_format *p = arg;
1362         struct video_device *vfd = video_devdata(file);
1363         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1364         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1365         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1366         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1367         int ret;
1368
1369         /*
1370          * fmt can't be cleared for these overlay types due to the 'clips'
1371          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1372          * Those are provided by the user. So handle these two overlay types
1373          * first, and then just do a simple memset for the other types.
1374          */
1375         switch (p->type) {
1376         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1377         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1378                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1379                 u32 clipcount = p->fmt.win.clipcount;
1380                 void __user *bitmap = p->fmt.win.bitmap;
1381
1382                 memset(&p->fmt, 0, sizeof(p->fmt));
1383                 p->fmt.win.clips = clips;
1384                 p->fmt.win.clipcount = clipcount;
1385                 p->fmt.win.bitmap = bitmap;
1386                 break;
1387         }
1388         default:
1389                 memset(&p->fmt, 0, sizeof(p->fmt));
1390                 break;
1391         }
1392
1393         switch (p->type) {
1394         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1395                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1396                         break;
1397                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1398                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1399                 /* just in case the driver zeroed it again */
1400                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1401                 return ret;
1402         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1403                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1404                         break;
1405                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1406         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1407                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1408                         break;
1409                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1410         case V4L2_BUF_TYPE_VBI_CAPTURE:
1411                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1412                         break;
1413                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1414         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1415                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1416                         break;
1417                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1418         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1419                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1420                         break;
1421                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1422                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1423                 /* just in case the driver zeroed it again */
1424                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1425                 return ret;
1426         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1427                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1428                         break;
1429                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1430         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1431                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1432                         break;
1433                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1434         case V4L2_BUF_TYPE_VBI_OUTPUT:
1435                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1436                         break;
1437                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1438         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1439                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1440                         break;
1441                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1442         case V4L2_BUF_TYPE_SDR_CAPTURE:
1443                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1444                         break;
1445                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1446         case V4L2_BUF_TYPE_SDR_OUTPUT:
1447                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1448                         break;
1449                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1450         }
1451         return -EINVAL;
1452 }
1453
1454 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1455                                 struct file *file, void *fh, void *arg)
1456 {
1457         struct v4l2_format *p = arg;
1458         struct video_device *vfd = video_devdata(file);
1459         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1460         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1461         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1462         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1463         int ret;
1464
1465         ret = v4l_enable_media_source(vfd);
1466         if (ret)
1467                 return ret;
1468         v4l_sanitize_format(p);
1469
1470         switch (p->type) {
1471         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1472                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1473                         break;
1474                 CLEAR_AFTER_FIELD(p, fmt.pix);
1475                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1476                 /* just in case the driver zeroed it again */
1477                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1478                 return ret;
1479         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1480                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1481                         break;
1482                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1483                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1484         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1485                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1486                         break;
1487                 CLEAR_AFTER_FIELD(p, fmt.win);
1488                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1489         case V4L2_BUF_TYPE_VBI_CAPTURE:
1490                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1491                         break;
1492                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1493                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1494         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1495                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1496                         break;
1497                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1498                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1499         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1500                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1501                         break;
1502                 CLEAR_AFTER_FIELD(p, fmt.pix);
1503                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1504                 /* just in case the driver zeroed it again */
1505                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1506                 return ret;
1507         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1508                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1509                         break;
1510                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1511                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1512         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1513                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1514                         break;
1515                 CLEAR_AFTER_FIELD(p, fmt.win);
1516                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1517         case V4L2_BUF_TYPE_VBI_OUTPUT:
1518                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1519                         break;
1520                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1521                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1522         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1523                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1524                         break;
1525                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1526                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1527         case V4L2_BUF_TYPE_SDR_CAPTURE:
1528                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1529                         break;
1530                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1531                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1532         case V4L2_BUF_TYPE_SDR_OUTPUT:
1533                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1534                         break;
1535                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1536                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1537         }
1538         return -EINVAL;
1539 }
1540
1541 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1542                                 struct file *file, void *fh, void *arg)
1543 {
1544         struct v4l2_format *p = arg;
1545         struct video_device *vfd = video_devdata(file);
1546         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1547         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1548         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1549         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1550         int ret;
1551
1552         v4l_sanitize_format(p);
1553
1554         switch (p->type) {
1555         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1556                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1557                         break;
1558                 CLEAR_AFTER_FIELD(p, fmt.pix);
1559                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1560                 /* just in case the driver zeroed it again */
1561                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1562                 return ret;
1563         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1564                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1565                         break;
1566                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1567                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1568         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1569                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1570                         break;
1571                 CLEAR_AFTER_FIELD(p, fmt.win);
1572                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1573         case V4L2_BUF_TYPE_VBI_CAPTURE:
1574                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1575                         break;
1576                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1577                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1578         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1579                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1580                         break;
1581                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1582                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1583         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1584                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1585                         break;
1586                 CLEAR_AFTER_FIELD(p, fmt.pix);
1587                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1588                 /* just in case the driver zeroed it again */
1589                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1590                 return ret;
1591         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1592                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1593                         break;
1594                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1595                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1596         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1597                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1598                         break;
1599                 CLEAR_AFTER_FIELD(p, fmt.win);
1600                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1601         case V4L2_BUF_TYPE_VBI_OUTPUT:
1602                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1603                         break;
1604                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1605                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1606         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1607                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1608                         break;
1609                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1610                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1611         case V4L2_BUF_TYPE_SDR_CAPTURE:
1612                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1613                         break;
1614                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1615                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1616         case V4L2_BUF_TYPE_SDR_OUTPUT:
1617                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1618                         break;
1619                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1620                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1621         }
1622         return -EINVAL;
1623 }
1624
1625 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1626                                 struct file *file, void *fh, void *arg)
1627 {
1628         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1629 }
1630
1631 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1632                                 struct file *file, void *fh, void *arg)
1633 {
1634         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1635 }
1636
1637 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1638                                 struct file *file, void *fh, void *arg)
1639 {
1640         struct video_device *vfd = video_devdata(file);
1641         struct v4l2_tuner *p = arg;
1642         int err;
1643
1644         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1645                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1646         err = ops->vidioc_g_tuner(file, fh, p);
1647         if (!err)
1648                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1649         return err;
1650 }
1651
1652 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1653                                 struct file *file, void *fh, void *arg)
1654 {
1655         struct video_device *vfd = video_devdata(file);
1656         struct v4l2_tuner *p = arg;
1657         int ret;
1658
1659         ret = v4l_enable_media_source(vfd);
1660         if (ret)
1661                 return ret;
1662         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1663                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1664         return ops->vidioc_s_tuner(file, fh, p);
1665 }
1666
1667 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1668                                 struct file *file, void *fh, void *arg)
1669 {
1670         struct video_device *vfd = video_devdata(file);
1671         struct v4l2_modulator *p = arg;
1672         int err;
1673
1674         if (vfd->vfl_type == VFL_TYPE_RADIO)
1675                 p->type = V4L2_TUNER_RADIO;
1676
1677         err = ops->vidioc_g_modulator(file, fh, p);
1678         if (!err)
1679                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1680         return err;
1681 }
1682
1683 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1684                                 struct file *file, void *fh, void *arg)
1685 {
1686         struct video_device *vfd = video_devdata(file);
1687         struct v4l2_modulator *p = arg;
1688
1689         if (vfd->vfl_type == VFL_TYPE_RADIO)
1690                 p->type = V4L2_TUNER_RADIO;
1691
1692         return ops->vidioc_s_modulator(file, fh, p);
1693 }
1694
1695 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1696                                 struct file *file, void *fh, void *arg)
1697 {
1698         struct video_device *vfd = video_devdata(file);
1699         struct v4l2_frequency *p = arg;
1700
1701         if (vfd->vfl_type == VFL_TYPE_SDR)
1702                 p->type = V4L2_TUNER_SDR;
1703         else
1704                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1705                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1706         return ops->vidioc_g_frequency(file, fh, p);
1707 }
1708
1709 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1710                                 struct file *file, void *fh, void *arg)
1711 {
1712         struct video_device *vfd = video_devdata(file);
1713         const struct v4l2_frequency *p = arg;
1714         enum v4l2_tuner_type type;
1715         int ret;
1716
1717         ret = v4l_enable_media_source(vfd);
1718         if (ret)
1719                 return ret;
1720         if (vfd->vfl_type == VFL_TYPE_SDR) {
1721                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1722                         return -EINVAL;
1723         } else {
1724                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1725                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1726                 if (type != p->type)
1727                         return -EINVAL;
1728         }
1729         return ops->vidioc_s_frequency(file, fh, p);
1730 }
1731
1732 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1733                                 struct file *file, void *fh, void *arg)
1734 {
1735         struct video_device *vfd = video_devdata(file);
1736         struct v4l2_standard *p = arg;
1737         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1738         unsigned int index = p->index, i, j = 0;
1739         const char *descr = "";
1740
1741         /* Return -ENODATA if the tvnorms for the current input
1742            or output is 0, meaning that it doesn't support this API. */
1743         if (id == 0)
1744                 return -ENODATA;
1745
1746         /* Return norm array in a canonical way */
1747         for (i = 0; i <= index && id; i++) {
1748                 /* last std value in the standards array is 0, so this
1749                    while always ends there since (id & 0) == 0. */
1750                 while ((id & standards[j].std) != standards[j].std)
1751                         j++;
1752                 curr_id = standards[j].std;
1753                 descr = standards[j].descr;
1754                 j++;
1755                 if (curr_id == 0)
1756                         break;
1757                 if (curr_id != V4L2_STD_PAL &&
1758                                 curr_id != V4L2_STD_SECAM &&
1759                                 curr_id != V4L2_STD_NTSC)
1760                         id &= ~curr_id;
1761         }
1762         if (i <= index)
1763                 return -EINVAL;
1764
1765         v4l2_video_std_construct(p, curr_id, descr);
1766         return 0;
1767 }
1768
1769 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1770                                 struct file *file, void *fh, void *arg)
1771 {
1772         struct video_device *vfd = video_devdata(file);
1773         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1774         int ret;
1775
1776         ret = v4l_enable_media_source(vfd);
1777         if (ret)
1778                 return ret;
1779         norm = id & vfd->tvnorms;
1780         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1781                 return -EINVAL;
1782
1783         /* Calls the specific handler */
1784         return ops->vidioc_s_std(file, fh, norm);
1785 }
1786
1787 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1788                                 struct file *file, void *fh, void *arg)
1789 {
1790         struct video_device *vfd = video_devdata(file);
1791         v4l2_std_id *p = arg;
1792         int ret;
1793
1794         ret = v4l_enable_media_source(vfd);
1795         if (ret)
1796                 return ret;
1797         /*
1798          * If no signal is detected, then the driver should return
1799          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1800          * any standards that do not apply removed.
1801          *
1802          * This means that tuners, audio and video decoders can join
1803          * their efforts to improve the standards detection.
1804          */
1805         *p = vfd->tvnorms;
1806         return ops->vidioc_querystd(file, fh, arg);
1807 }
1808
1809 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1810                                 struct file *file, void *fh, void *arg)
1811 {
1812         struct video_device *vfd = video_devdata(file);
1813         struct v4l2_hw_freq_seek *p = arg;
1814         enum v4l2_tuner_type type;
1815         int ret;
1816
1817         ret = v4l_enable_media_source(vfd);
1818         if (ret)
1819                 return ret;
1820         /* s_hw_freq_seek is not supported for SDR for now */
1821         if (vfd->vfl_type == VFL_TYPE_SDR)
1822                 return -EINVAL;
1823
1824         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1825                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1826         if (p->type != type)
1827                 return -EINVAL;
1828         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1829 }
1830
1831 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1832                                 struct file *file, void *fh, void *arg)
1833 {
1834         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1835 }
1836
1837 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1838                                 struct file *file, void *fh, void *arg)
1839 {
1840         struct v4l2_requestbuffers *p = arg;
1841         int ret = check_fmt(file, p->type);
1842
1843         if (ret)
1844                 return ret;
1845
1846         CLEAR_AFTER_FIELD(p, memory);
1847
1848         return ops->vidioc_reqbufs(file, fh, p);
1849 }
1850
1851 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1852                                 struct file *file, void *fh, void *arg)
1853 {
1854         struct v4l2_buffer *p = arg;
1855         int ret = check_fmt(file, p->type);
1856
1857         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1858 }
1859
1860 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1861                                 struct file *file, void *fh, void *arg)
1862 {
1863         struct v4l2_buffer *p = arg;
1864         int ret = check_fmt(file, p->type);
1865
1866         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1867 }
1868
1869 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1870                                 struct file *file, void *fh, void *arg)
1871 {
1872         struct v4l2_buffer *p = arg;
1873         int ret = check_fmt(file, p->type);
1874
1875         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1876 }
1877
1878 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1879                                 struct file *file, void *fh, void *arg)
1880 {
1881         struct v4l2_create_buffers *create = arg;
1882         int ret = check_fmt(file, create->format.type);
1883
1884         if (ret)
1885                 return ret;
1886
1887         CLEAR_AFTER_FIELD(create, format);
1888
1889         v4l_sanitize_format(&create->format);
1890
1891         ret = ops->vidioc_create_bufs(file, fh, create);
1892
1893         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1894             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1895                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1896
1897         return ret;
1898 }
1899
1900 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1901                                 struct file *file, void *fh, void *arg)
1902 {
1903         struct v4l2_buffer *b = arg;
1904         int ret = check_fmt(file, b->type);
1905
1906         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1907 }
1908
1909 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1910                                 struct file *file, void *fh, void *arg)
1911 {
1912         struct v4l2_streamparm *p = arg;
1913         v4l2_std_id std;
1914         int ret = check_fmt(file, p->type);
1915
1916         if (ret)
1917                 return ret;
1918         if (ops->vidioc_g_parm)
1919                 return ops->vidioc_g_parm(file, fh, p);
1920         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1921             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1922                 return -EINVAL;
1923         p->parm.capture.readbuffers = 2;
1924         ret = ops->vidioc_g_std(file, fh, &std);
1925         if (ret == 0)
1926                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1927         return ret;
1928 }
1929
1930 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1931                                 struct file *file, void *fh, void *arg)
1932 {
1933         struct v4l2_streamparm *p = arg;
1934         int ret = check_fmt(file, p->type);
1935
1936         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1937 }
1938
1939 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1940                                 struct file *file, void *fh, void *arg)
1941 {
1942         struct video_device *vfd = video_devdata(file);
1943         struct v4l2_queryctrl *p = arg;
1944         struct v4l2_fh *vfh =
1945                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1946
1947         if (vfh && vfh->ctrl_handler)
1948                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1949         if (vfd->ctrl_handler)
1950                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1951         if (ops->vidioc_queryctrl)
1952                 return ops->vidioc_queryctrl(file, fh, p);
1953         return -ENOTTY;
1954 }
1955
1956 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1957                                 struct file *file, void *fh, void *arg)
1958 {
1959         struct video_device *vfd = video_devdata(file);
1960         struct v4l2_query_ext_ctrl *p = arg;
1961         struct v4l2_fh *vfh =
1962                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1963
1964         if (vfh && vfh->ctrl_handler)
1965                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1966         if (vfd->ctrl_handler)
1967                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1968         if (ops->vidioc_query_ext_ctrl)
1969                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1970         return -ENOTTY;
1971 }
1972
1973 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1974                                 struct file *file, void *fh, void *arg)
1975 {
1976         struct video_device *vfd = video_devdata(file);
1977         struct v4l2_querymenu *p = arg;
1978         struct v4l2_fh *vfh =
1979                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1980
1981         if (vfh && vfh->ctrl_handler)
1982                 return v4l2_querymenu(vfh->ctrl_handler, p);
1983         if (vfd->ctrl_handler)
1984                 return v4l2_querymenu(vfd->ctrl_handler, p);
1985         if (ops->vidioc_querymenu)
1986                 return ops->vidioc_querymenu(file, fh, p);
1987         return -ENOTTY;
1988 }
1989
1990 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1991                                 struct file *file, void *fh, void *arg)
1992 {
1993         struct video_device *vfd = video_devdata(file);
1994         struct v4l2_control *p = arg;
1995         struct v4l2_fh *vfh =
1996                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1997         struct v4l2_ext_controls ctrls;
1998         struct v4l2_ext_control ctrl;
1999
2000         if (vfh && vfh->ctrl_handler)
2001                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2002         if (vfd->ctrl_handler)
2003                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2004         if (ops->vidioc_g_ctrl)
2005                 return ops->vidioc_g_ctrl(file, fh, p);
2006         if (ops->vidioc_g_ext_ctrls == NULL)
2007                 return -ENOTTY;
2008
2009         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2010         ctrls.count = 1;
2011         ctrls.controls = &ctrl;
2012         ctrl.id = p->id;
2013         ctrl.value = p->value;
2014         if (check_ext_ctrls(&ctrls, 1)) {
2015                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2016
2017                 if (ret == 0)
2018                         p->value = ctrl.value;
2019                 return ret;
2020         }
2021         return -EINVAL;
2022 }
2023
2024 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2025                                 struct file *file, void *fh, void *arg)
2026 {
2027         struct video_device *vfd = video_devdata(file);
2028         struct v4l2_control *p = arg;
2029         struct v4l2_fh *vfh =
2030                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2031         struct v4l2_ext_controls ctrls;
2032         struct v4l2_ext_control ctrl;
2033
2034         if (vfh && vfh->ctrl_handler)
2035                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2036         if (vfd->ctrl_handler)
2037                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2038         if (ops->vidioc_s_ctrl)
2039                 return ops->vidioc_s_ctrl(file, fh, p);
2040         if (ops->vidioc_s_ext_ctrls == NULL)
2041                 return -ENOTTY;
2042
2043         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2044         ctrls.count = 1;
2045         ctrls.controls = &ctrl;
2046         ctrl.id = p->id;
2047         ctrl.value = p->value;
2048         if (check_ext_ctrls(&ctrls, 1))
2049                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2050         return -EINVAL;
2051 }
2052
2053 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2054                                 struct file *file, void *fh, void *arg)
2055 {
2056         struct video_device *vfd = video_devdata(file);
2057         struct v4l2_ext_controls *p = arg;
2058         struct v4l2_fh *vfh =
2059                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2060
2061         p->error_idx = p->count;
2062         if (vfh && vfh->ctrl_handler)
2063                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2064         if (vfd->ctrl_handler)
2065                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2066         if (ops->vidioc_g_ext_ctrls == NULL)
2067                 return -ENOTTY;
2068         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2069                                         -EINVAL;
2070 }
2071
2072 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2073                                 struct file *file, void *fh, void *arg)
2074 {
2075         struct video_device *vfd = video_devdata(file);
2076         struct v4l2_ext_controls *p = arg;
2077         struct v4l2_fh *vfh =
2078                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2079
2080         p->error_idx = p->count;
2081         if (vfh && vfh->ctrl_handler)
2082                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2083         if (vfd->ctrl_handler)
2084                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2085         if (ops->vidioc_s_ext_ctrls == NULL)
2086                 return -ENOTTY;
2087         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2088                                         -EINVAL;
2089 }
2090
2091 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2092                                 struct file *file, void *fh, void *arg)
2093 {
2094         struct video_device *vfd = video_devdata(file);
2095         struct v4l2_ext_controls *p = arg;
2096         struct v4l2_fh *vfh =
2097                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2098
2099         p->error_idx = p->count;
2100         if (vfh && vfh->ctrl_handler)
2101                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2102         if (vfd->ctrl_handler)
2103                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2104         if (ops->vidioc_try_ext_ctrls == NULL)
2105                 return -ENOTTY;
2106         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2107                                         -EINVAL;
2108 }
2109
2110 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2111                                 struct file *file, void *fh, void *arg)
2112 {
2113         struct v4l2_crop *p = arg;
2114         struct v4l2_selection s = {
2115                 .type = p->type,
2116         };
2117         int ret;
2118
2119         if (ops->vidioc_g_crop)
2120                 return ops->vidioc_g_crop(file, fh, p);
2121         /* simulate capture crop using selection api */
2122
2123         /* crop means compose for output devices */
2124         if (V4L2_TYPE_IS_OUTPUT(p->type))
2125                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2126         else
2127                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2128
2129         ret = ops->vidioc_g_selection(file, fh, &s);
2130
2131         /* copying results to old structure on success */
2132         if (!ret)
2133                 p->c = s.r;
2134         return ret;
2135 }
2136
2137 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2138                                 struct file *file, void *fh, void *arg)
2139 {
2140         struct v4l2_crop *p = arg;
2141         struct v4l2_selection s = {
2142                 .type = p->type,
2143                 .r = p->c,
2144         };
2145
2146         if (ops->vidioc_s_crop)
2147                 return ops->vidioc_s_crop(file, fh, p);
2148         /* simulate capture crop using selection api */
2149
2150         /* crop means compose for output devices */
2151         if (V4L2_TYPE_IS_OUTPUT(p->type))
2152                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2153         else
2154                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2155
2156         return ops->vidioc_s_selection(file, fh, &s);
2157 }
2158
2159 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2160                                 struct file *file, void *fh, void *arg)
2161 {
2162         struct v4l2_cropcap *p = arg;
2163         struct v4l2_selection s = { .type = p->type };
2164         int ret = 0;
2165
2166         /* setting trivial pixelaspect */
2167         p->pixelaspect.numerator = 1;
2168         p->pixelaspect.denominator = 1;
2169
2170         /*
2171          * The determine_valid_ioctls() call already should ensure
2172          * that this can never happen, but just in case...
2173          */
2174         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2175                 return -ENOTTY;
2176
2177         if (ops->vidioc_cropcap)
2178                 ret = ops->vidioc_cropcap(file, fh, p);
2179
2180         if (!ops->vidioc_g_selection)
2181                 return ret;
2182
2183         /*
2184          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2185          * square pixel aspect ratio in that case.
2186          */
2187         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2188                 return ret;
2189
2190         /* Use g_selection() to fill in the bounds and defrect rectangles */
2191
2192         /* obtaining bounds */
2193         if (V4L2_TYPE_IS_OUTPUT(p->type))
2194                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2195         else
2196                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2197
2198         ret = ops->vidioc_g_selection(file, fh, &s);
2199         if (ret)
2200                 return ret;
2201         p->bounds = s.r;
2202
2203         /* obtaining defrect */
2204         if (V4L2_TYPE_IS_OUTPUT(p->type))
2205                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2206         else
2207                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2208
2209         ret = ops->vidioc_g_selection(file, fh, &s);
2210         if (ret)
2211                 return ret;
2212         p->defrect = s.r;
2213
2214         return 0;
2215 }
2216
2217 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2218                                 struct file *file, void *fh, void *arg)
2219 {
2220         struct video_device *vfd = video_devdata(file);
2221         int ret;
2222
2223         if (vfd->v4l2_dev)
2224                 pr_info("%s: =================  START STATUS  =================\n",
2225                         vfd->v4l2_dev->name);
2226         ret = ops->vidioc_log_status(file, fh);
2227         if (vfd->v4l2_dev)
2228                 pr_info("%s: ==================  END STATUS  ==================\n",
2229                         vfd->v4l2_dev->name);
2230         return ret;
2231 }
2232
2233 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2234                                 struct file *file, void *fh, void *arg)
2235 {
2236 #ifdef CONFIG_VIDEO_ADV_DEBUG
2237         struct v4l2_dbg_register *p = arg;
2238         struct video_device *vfd = video_devdata(file);
2239         struct v4l2_subdev *sd;
2240         int idx = 0;
2241
2242         if (!capable(CAP_SYS_ADMIN))
2243                 return -EPERM;
2244         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2245                 if (vfd->v4l2_dev == NULL)
2246                         return -EINVAL;
2247                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2248                         if (p->match.addr == idx++)
2249                                 return v4l2_subdev_call(sd, core, g_register, p);
2250                 return -EINVAL;
2251         }
2252         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2253             (ops->vidioc_g_chip_info || p->match.addr == 0))
2254                 return ops->vidioc_g_register(file, fh, p);
2255         return -EINVAL;
2256 #else
2257         return -ENOTTY;
2258 #endif
2259 }
2260
2261 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2262                                 struct file *file, void *fh, void *arg)
2263 {
2264 #ifdef CONFIG_VIDEO_ADV_DEBUG
2265         const struct v4l2_dbg_register *p = arg;
2266         struct video_device *vfd = video_devdata(file);
2267         struct v4l2_subdev *sd;
2268         int idx = 0;
2269
2270         if (!capable(CAP_SYS_ADMIN))
2271                 return -EPERM;
2272         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2273                 if (vfd->v4l2_dev == NULL)
2274                         return -EINVAL;
2275                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2276                         if (p->match.addr == idx++)
2277                                 return v4l2_subdev_call(sd, core, s_register, p);
2278                 return -EINVAL;
2279         }
2280         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2281             (ops->vidioc_g_chip_info || p->match.addr == 0))
2282                 return ops->vidioc_s_register(file, fh, p);
2283         return -EINVAL;
2284 #else
2285         return -ENOTTY;
2286 #endif
2287 }
2288
2289 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2290                                 struct file *file, void *fh, void *arg)
2291 {
2292 #ifdef CONFIG_VIDEO_ADV_DEBUG
2293         struct video_device *vfd = video_devdata(file);
2294         struct v4l2_dbg_chip_info *p = arg;
2295         struct v4l2_subdev *sd;
2296         int idx = 0;
2297
2298         switch (p->match.type) {
2299         case V4L2_CHIP_MATCH_BRIDGE:
2300                 if (ops->vidioc_s_register)
2301                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2302                 if (ops->vidioc_g_register)
2303                         p->flags |= V4L2_CHIP_FL_READABLE;
2304                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2305                 if (ops->vidioc_g_chip_info)
2306                         return ops->vidioc_g_chip_info(file, fh, arg);
2307                 if (p->match.addr)
2308                         return -EINVAL;
2309                 return 0;
2310
2311         case V4L2_CHIP_MATCH_SUBDEV:
2312                 if (vfd->v4l2_dev == NULL)
2313                         break;
2314                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2315                         if (p->match.addr != idx++)
2316                                 continue;
2317                         if (sd->ops->core && sd->ops->core->s_register)
2318                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2319                         if (sd->ops->core && sd->ops->core->g_register)
2320                                 p->flags |= V4L2_CHIP_FL_READABLE;
2321                         strlcpy(p->name, sd->name, sizeof(p->name));
2322                         return 0;
2323                 }
2324                 break;
2325         }
2326         return -EINVAL;
2327 #else
2328         return -ENOTTY;
2329 #endif
2330 }
2331
2332 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2333                                 struct file *file, void *fh, void *arg)
2334 {
2335         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2336 }
2337
2338 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2339                                 struct file *file, void *fh, void *arg)
2340 {
2341         return ops->vidioc_subscribe_event(fh, arg);
2342 }
2343
2344 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2345                                 struct file *file, void *fh, void *arg)
2346 {
2347         return ops->vidioc_unsubscribe_event(fh, arg);
2348 }
2349
2350 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2351                                 struct file *file, void *fh, void *arg)
2352 {
2353         struct v4l2_sliced_vbi_cap *p = arg;
2354         int ret = check_fmt(file, p->type);
2355
2356         if (ret)
2357                 return ret;
2358
2359         /* Clear up to type, everything after type is zeroed already */
2360         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2361
2362         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2363 }
2364
2365 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2366                                 struct file *file, void *fh, void *arg)
2367 {
2368         struct video_device *vfd = video_devdata(file);
2369         struct v4l2_frequency_band *p = arg;
2370         enum v4l2_tuner_type type;
2371         int err;
2372
2373         if (vfd->vfl_type == VFL_TYPE_SDR) {
2374                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2375                         return -EINVAL;
2376                 type = p->type;
2377         } else {
2378                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2379                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2380                 if (type != p->type)
2381                         return -EINVAL;
2382         }
2383         if (ops->vidioc_enum_freq_bands) {
2384                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2385                 if (err != -ENOTTY)
2386                         return err;
2387         }
2388         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2389                 struct v4l2_tuner t = {
2390                         .index = p->tuner,
2391                         .type = type,
2392                 };
2393
2394                 if (p->index)
2395                         return -EINVAL;
2396                 err = ops->vidioc_g_tuner(file, fh, &t);
2397                 if (err)
2398                         return err;
2399                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2400                 p->rangelow = t.rangelow;
2401                 p->rangehigh = t.rangehigh;
2402                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2403                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2404                 return 0;
2405         }
2406         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2407                 struct v4l2_modulator m = {
2408                         .index = p->tuner,
2409                 };
2410
2411                 if (type != V4L2_TUNER_RADIO)
2412                         return -EINVAL;
2413                 if (p->index)
2414                         return -EINVAL;
2415                 err = ops->vidioc_g_modulator(file, fh, &m);
2416                 if (err)
2417                         return err;
2418                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2419                 p->rangelow = m.rangelow;
2420                 p->rangehigh = m.rangehigh;
2421                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2422                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2423                 return 0;
2424         }
2425         return -ENOTTY;
2426 }
2427
2428 struct v4l2_ioctl_info {
2429         unsigned int ioctl;
2430         u32 flags;
2431         const char * const name;
2432         union {
2433                 u32 offset;
2434                 int (*func)(const struct v4l2_ioctl_ops *ops,
2435                                 struct file *file, void *fh, void *p);
2436         } u;
2437         void (*debug)(const void *arg, bool write_only);
2438 };
2439
2440 /* This control needs a priority check */
2441 #define INFO_FL_PRIO    (1 << 0)
2442 /* This control can be valid if the filehandle passes a control handler. */
2443 #define INFO_FL_CTRL    (1 << 1)
2444 /* This is a standard ioctl, no need for special code */
2445 #define INFO_FL_STD     (1 << 2)
2446 /* This is ioctl has its own function */
2447 #define INFO_FL_FUNC    (1 << 3)
2448 /* Queuing ioctl */
2449 #define INFO_FL_QUEUE   (1 << 4)
2450 /* Zero struct from after the field to the end */
2451 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2452         ((offsetof(struct v4l2_struct, field) +                 \
2453           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2454 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2455
2456 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2457         [_IOC_NR(_ioctl)] = {                                           \
2458                 .ioctl = _ioctl,                                        \
2459                 .flags = _flags | INFO_FL_STD,                          \
2460                 .name = #_ioctl,                                        \
2461                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2462                 .debug = _debug,                                        \
2463         }
2464
2465 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2466         [_IOC_NR(_ioctl)] = {                                           \
2467                 .ioctl = _ioctl,                                        \
2468                 .flags = _flags | INFO_FL_FUNC,                         \
2469                 .name = #_ioctl,                                        \
2470                 .u.func = _func,                                        \
2471                 .debug = _debug,                                        \
2472         }
2473
2474 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2475         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2476         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2477         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2478         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2479         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2480         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2481         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2482         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2483         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2484         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2485         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2486         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2487         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2488         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2489         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2490         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2491         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2492         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2493         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2494         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2495         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2496         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2497         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2498         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2499         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2500         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2501         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2502         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2503         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2504         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2505         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2506         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2507         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2508         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2509         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2510         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2511         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2512         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2513         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2514         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2515         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2516         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2517         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2518         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2519         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2520         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2521         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2522         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2523         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2524         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2525         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2526         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2527         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2528         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2529         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)),
2530         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2531         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2532         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2533         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2534         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2535         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2536         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2537         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2538         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2539         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2540         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2541         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2542         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2543         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2544         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2545         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2546         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2547         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2548         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2549         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2550         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2551         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2552         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2553         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2554         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2555         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)),
2556         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)),
2557 };
2558 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2559
2560 bool v4l2_is_known_ioctl(unsigned int cmd)
2561 {
2562         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2563                 return false;
2564         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2565 }
2566
2567 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2568 {
2569         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2570                 return vdev->lock;
2571         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2572                 return NULL;
2573         if (vdev->queue && vdev->queue->lock &&
2574                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2575                 return vdev->queue->lock;
2576         return vdev->lock;
2577 }
2578
2579 /* Common ioctl debug function. This function can be used by
2580    external ioctl messages as well as internal V4L ioctl */
2581 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2582 {
2583         const char *dir, *type;
2584
2585         if (prefix)
2586                 printk(KERN_DEBUG "%s: ", prefix);
2587
2588         switch (_IOC_TYPE(cmd)) {
2589         case 'd':
2590                 type = "v4l2_int";
2591                 break;
2592         case 'V':
2593                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2594                         type = "v4l2";
2595                         break;
2596                 }
2597                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2598                 return;
2599         default:
2600                 type = "unknown";
2601                 break;
2602         }
2603
2604         switch (_IOC_DIR(cmd)) {
2605         case _IOC_NONE:              dir = "--"; break;
2606         case _IOC_READ:              dir = "r-"; break;
2607         case _IOC_WRITE:             dir = "-w"; break;
2608         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2609         default:                     dir = "*ERR*"; break;
2610         }
2611         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2612                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2613 }
2614 EXPORT_SYMBOL(v4l_printk_ioctl);
2615
2616 static long __video_do_ioctl(struct file *file,
2617                 unsigned int cmd, void *arg)
2618 {
2619         struct video_device *vfd = video_devdata(file);
2620         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2621         bool write_only = false;
2622         struct v4l2_ioctl_info default_info;
2623         const struct v4l2_ioctl_info *info;
2624         void *fh = file->private_data;
2625         struct v4l2_fh *vfh = NULL;
2626         int dev_debug = vfd->dev_debug;
2627         long ret = -ENOTTY;
2628
2629         if (ops == NULL) {
2630                 pr_warn("%s: has no ioctl_ops.\n",
2631                                 video_device_node_name(vfd));
2632                 return ret;
2633         }
2634
2635         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2636                 vfh = file->private_data;
2637
2638         if (v4l2_is_known_ioctl(cmd)) {
2639                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2640
2641                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2642                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2643                         goto done;
2644
2645                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2646                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2647                         if (ret)
2648                                 goto done;
2649                 }
2650         } else {
2651                 default_info.ioctl = cmd;
2652                 default_info.flags = 0;
2653                 default_info.debug = v4l_print_default;
2654                 info = &default_info;
2655         }
2656
2657         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2658         if (info->flags & INFO_FL_STD) {
2659                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2660                 const void *p = vfd->ioctl_ops;
2661                 const vidioc_op *vidioc = p + info->u.offset;
2662
2663                 ret = (*vidioc)(file, fh, arg);
2664         } else if (info->flags & INFO_FL_FUNC) {
2665                 ret = info->u.func(ops, file, fh, arg);
2666         } else if (!ops->vidioc_default) {
2667                 ret = -ENOTTY;
2668         } else {
2669                 ret = ops->vidioc_default(file, fh,
2670                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2671                         cmd, arg);
2672         }
2673
2674 done:
2675         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2676                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2677                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2678                         return ret;
2679
2680                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2681                 if (ret < 0)
2682                         pr_cont(": error %ld", ret);
2683                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2684                         pr_cont("\n");
2685                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2686                         info->debug(arg, write_only);
2687                 else {
2688                         pr_cont(": ");
2689                         info->debug(arg, write_only);
2690                 }
2691         }
2692
2693         return ret;
2694 }
2695
2696 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2697                             void __user **user_ptr, void ***kernel_ptr)
2698 {
2699         int ret = 0;
2700
2701         switch (cmd) {
2702         case VIDIOC_PREPARE_BUF:
2703         case VIDIOC_QUERYBUF:
2704         case VIDIOC_QBUF:
2705         case VIDIOC_DQBUF: {
2706                 struct v4l2_buffer *buf = parg;
2707
2708                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2709                         if (buf->length > VIDEO_MAX_PLANES) {
2710                                 ret = -EINVAL;
2711                                 break;
2712                         }
2713                         *user_ptr = (void __user *)buf->m.planes;
2714                         *kernel_ptr = (void **)&buf->m.planes;
2715                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2716                         ret = 1;
2717                 }
2718                 break;
2719         }
2720
2721         case VIDIOC_G_EDID:
2722         case VIDIOC_S_EDID: {
2723                 struct v4l2_edid *edid = parg;
2724
2725                 if (edid->blocks) {
2726                         if (edid->blocks > 256) {
2727                                 ret = -EINVAL;
2728                                 break;
2729                         }
2730                         *user_ptr = (void __user *)edid->edid;
2731                         *kernel_ptr = (void **)&edid->edid;
2732                         *array_size = edid->blocks * 128;
2733                         ret = 1;
2734                 }
2735                 break;
2736         }
2737
2738         case VIDIOC_S_EXT_CTRLS:
2739         case VIDIOC_G_EXT_CTRLS:
2740         case VIDIOC_TRY_EXT_CTRLS: {
2741                 struct v4l2_ext_controls *ctrls = parg;
2742
2743                 if (ctrls->count != 0) {
2744                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2745                                 ret = -EINVAL;
2746                                 break;
2747                         }
2748                         *user_ptr = (void __user *)ctrls->controls;
2749                         *kernel_ptr = (void **)&ctrls->controls;
2750                         *array_size = sizeof(struct v4l2_ext_control)
2751                                     * ctrls->count;
2752                         ret = 1;
2753                 }
2754                 break;
2755         }
2756         }
2757
2758         return ret;
2759 }
2760
2761 long
2762 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2763                v4l2_kioctl func)
2764 {
2765         char    sbuf[128];
2766         void    *mbuf = NULL;
2767         void    *parg = (void *)arg;
2768         long    err  = -EINVAL;
2769         bool    has_array_args;
2770         size_t  array_size = 0;
2771         void __user *user_ptr = NULL;
2772         void    **kernel_ptr = NULL;
2773
2774         /*  Copy arguments into temp kernel buffer  */
2775         if (_IOC_DIR(cmd) != _IOC_NONE) {
2776                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2777                         parg = sbuf;
2778                 } else {
2779                         /* too big to allocate from stack */
2780                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2781                         if (NULL == mbuf)
2782                                 return -ENOMEM;
2783                         parg = mbuf;
2784                 }
2785
2786                 err = -EFAULT;
2787                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2788                         unsigned int n = _IOC_SIZE(cmd);
2789
2790                         /*
2791                          * In some cases, only a few fields are used as input,
2792                          * i.e. when the app sets "index" and then the driver
2793                          * fills in the rest of the structure for the thing
2794                          * with that index.  We only need to copy up the first
2795                          * non-input field.
2796                          */
2797                         if (v4l2_is_known_ioctl(cmd)) {
2798                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2799                                 if (flags & INFO_FL_CLEAR_MASK)
2800                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2801                         }
2802
2803                         if (copy_from_user(parg, (void __user *)arg, n))
2804                                 goto out;
2805
2806                         /* zero out anything we don't copy from userspace */
2807                         if (n < _IOC_SIZE(cmd))
2808                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2809                 } else {
2810                         /* read-only ioctl */
2811                         memset(parg, 0, _IOC_SIZE(cmd));
2812                 }
2813         }
2814
2815         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2816         if (err < 0)
2817                 goto out;
2818         has_array_args = err;
2819
2820         if (has_array_args) {
2821                 /*
2822                  * When adding new types of array args, make sure that the
2823                  * parent argument to ioctl (which contains the pointer to the
2824                  * array) fits into sbuf (so that mbuf will still remain
2825                  * unused up to here).
2826                  */
2827                 mbuf = kmalloc(array_size, GFP_KERNEL);
2828                 err = -ENOMEM;
2829                 if (NULL == mbuf)
2830                         goto out_array_args;
2831                 err = -EFAULT;
2832                 if (copy_from_user(mbuf, user_ptr, array_size))
2833                         goto out_array_args;
2834                 *kernel_ptr = mbuf;
2835         }
2836
2837         /* Handles IOCTL */
2838         err = func(file, cmd, parg);
2839         if (err == -ENOIOCTLCMD)
2840                 err = -ENOTTY;
2841         if (err == 0) {
2842                 if (cmd == VIDIOC_DQBUF)
2843                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2844                 else if (cmd == VIDIOC_QBUF)
2845                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2846         }
2847
2848         if (has_array_args) {
2849                 *kernel_ptr = (void __force *)user_ptr;
2850                 if (copy_to_user(user_ptr, mbuf, array_size))
2851                         err = -EFAULT;
2852                 goto out_array_args;
2853         }
2854         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2855            results that must be returned. */
2856         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2857                 goto out;
2858
2859 out_array_args:
2860         /*  Copy results into user buffer  */
2861         switch (_IOC_DIR(cmd)) {
2862         case _IOC_READ:
2863         case (_IOC_WRITE | _IOC_READ):
2864                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2865                         err = -EFAULT;
2866                 break;
2867         }
2868
2869 out:
2870         kfree(mbuf);
2871         return err;
2872 }
2873 EXPORT_SYMBOL(video_usercopy);
2874
2875 long video_ioctl2(struct file *file,
2876                unsigned int cmd, unsigned long arg)
2877 {
2878         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2879 }
2880 EXPORT_SYMBOL(video_ioctl2);