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/mm.h>
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/types.h>
  19 #include <linux/kernel.h>
  20 #include <linux/version.h>
  21
  22 #include <linux/videodev2.h>
  23
  24 #include <media/v4l2-common.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/v4l2-ctrls.h>
  27 #include <media/v4l2-fh.h>
  28 #include <media/v4l2-event.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/videobuf2-v4l2.h>
  31 #include <media/v4l2-mc.h>
  32
  33 #include <trace/events/v4l2.h>
  34
  35 /* Zero out the end of the struct pointed to by p.  Everything after, but
  36  * not including, the specified field is cleared. */
  37 #define CLEAR_AFTER_FIELD(p, field) \
  38         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  39         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  40
  41 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  42
  43 struct std_descr {
  44         v4l2_std_id std;
  45         const char *descr;
  46 };
  47
  48 static const struct std_descr standards[] = {
  49         { V4L2_STD_NTSC,        "NTSC"      },
  50         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  51         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  52         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  53         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  54         { V4L2_STD_PAL,         "PAL"       },
  55         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  56         { V4L2_STD_PAL_B,       "PAL-B"     },
  57         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  58         { V4L2_STD_PAL_G,       "PAL-G"     },
  59         { V4L2_STD_PAL_H,       "PAL-H"     },
  60         { V4L2_STD_PAL_I,       "PAL-I"     },
  61         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  62         { V4L2_STD_PAL_D,       "PAL-D"     },
  63         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  64         { V4L2_STD_PAL_K,       "PAL-K"     },
  65         { V4L2_STD_PAL_M,       "PAL-M"     },
  66         { V4L2_STD_PAL_N,       "PAL-N"     },
  67         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  68         { V4L2_STD_PAL_60,      "PAL-60"    },
  69         { V4L2_STD_SECAM,       "SECAM"     },
  70         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  71         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  72         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  73         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  74         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  75         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  76         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  77         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  78         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  79         { 0,                    "Unknown"   }
  80 };
  81
  82 /* video4linux standard ID conversion to standard name
  83  */
  84 const char *v4l2_norm_to_name(v4l2_std_id id)
  85 {
  86         u32 myid = id;
  87         int i;
  88
  89         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  90            64 bit comparations. So, on that architecture, with some gcc
  91            variants, compilation fails. Currently, the max value is 30bit wide.
  92          */
  93         BUG_ON(myid != id);
  94
  95         for (i = 0; standards[i].std; i++)
  96                 if (myid == standards[i].std)
  97                         break;
  98         return standards[i].descr;
  99 }
 100 EXPORT_SYMBOL(v4l2_norm_to_name);
 101
 102 /* Returns frame period for the given standard */
 103 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 104 {
 105         if (id & V4L2_STD_525_60) {
 106                 frameperiod->numerator = 1001;
 107                 frameperiod->denominator = 30000;
 108         } else {
 109                 frameperiod->numerator = 1;
 110                 frameperiod->denominator = 25;
 111         }
 112 }
 113 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 114
 115 /* Fill in the fields of a v4l2_standard structure according to the
 116    'id' and 'transmission' parameters.  Returns negative on error.  */
 117 int v4l2_video_std_construct(struct v4l2_standard *vs,
 118                              int id, const char *name)
 119 {
 120         vs->id = id;
 121         v4l2_video_std_frame_period(id, &vs->frameperiod);
 122         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 123         strlcpy(vs->name, name, sizeof(vs->name));
 124         return 0;
 125 }
 126 EXPORT_SYMBOL(v4l2_video_std_construct);
 127
 128 /* ----------------------------------------------------------------- */
 129 /* some arrays for pretty-printing debug messages of enum types      */
 130
 131 const char *v4l2_field_names[] = {
 132         [V4L2_FIELD_ANY]        = "any",
 133         [V4L2_FIELD_NONE]       = "none",
 134         [V4L2_FIELD_TOP]        = "top",
 135         [V4L2_FIELD_BOTTOM]     = "bottom",
 136         [V4L2_FIELD_INTERLACED] = "interlaced",
 137         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 138         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 139         [V4L2_FIELD_ALTERNATE]  = "alternate",
 140         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 141         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 142 };
 143 EXPORT_SYMBOL(v4l2_field_names);
 144
 145 const char *v4l2_type_names[] = {
 146         [0]                                = "0",
 147         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 148         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 149         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 150         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 151         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 152         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 153         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 154         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 155         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 156         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 157         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 158         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 159         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 160 };
 161 EXPORT_SYMBOL(v4l2_type_names);
 162
 163 static const char *v4l2_memory_names[] = {
 164         [V4L2_MEMORY_MMAP]    = "mmap",
 165         [V4L2_MEMORY_USERPTR] = "userptr",
 166         [V4L2_MEMORY_OVERLAY] = "overlay",
 167         [V4L2_MEMORY_DMABUF] = "dmabuf",
 168 };
 169
 170 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 171
 172 /* ------------------------------------------------------------------ */
 173 /* debug help functions                                               */
 174
 175 static void v4l_print_querycap(const void *arg, bool write_only)
 176 {
 177         const struct v4l2_capability *p = arg;
 178
 179         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 180                 (int)sizeof(p->driver), p->driver,
 181                 (int)sizeof(p->card), p->card,
 182                 (int)sizeof(p->bus_info), p->bus_info,
 183                 p->version, p->capabilities, p->device_caps);
 184 }
 185
 186 static void v4l_print_enuminput(const void *arg, bool write_only)
 187 {
 188         const struct v4l2_input *p = arg;
 189
 190         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, 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, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 201                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 202                 p->modulator, (unsigned long long)p->std, p->capabilities);
 203 }
 204
 205 static void v4l_print_audio(const void *arg, bool write_only)
 206 {
 207         const struct v4l2_audio *p = arg;
 208
 209         if (write_only)
 210                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 211         else
 212                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 213                         p->index, (int)sizeof(p->name), p->name,
 214                         p->capability, p->mode);
 215 }
 216
 217 static void v4l_print_audioout(const void *arg, bool write_only)
 218 {
 219         const struct v4l2_audioout *p = arg;
 220
 221         if (write_only)
 222                 pr_cont("index=%u\n", p->index);
 223         else
 224                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 225                         p->index, (int)sizeof(p->name), p->name,
 226                         p->capability, p->mode);
 227 }
 228
 229 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 230 {
 231         const struct v4l2_fmtdesc *p = arg;
 232
 233         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 234                 p->index, prt_names(p->type, v4l2_type_names),
 235                 p->flags, (p->pixelformat & 0xff),
 236                 (p->pixelformat >>  8) & 0xff,
 237                 (p->pixelformat >> 16) & 0xff,
 238                 (p->pixelformat >> 24) & 0xff,
 239                 (int)sizeof(p->description), p->description);
 240 }
 241
 242 static void v4l_print_format(const void *arg, bool write_only)
 243 {
 244         const struct v4l2_format *p = arg;
 245         const struct v4l2_pix_format *pix;
 246         const struct v4l2_pix_format_mplane *mp;
 247         const struct v4l2_vbi_format *vbi;
 248         const struct v4l2_sliced_vbi_format *sliced;
 249         const struct v4l2_window *win;
 250         const struct v4l2_sdr_format *sdr;
 251         const struct v4l2_meta_format *meta;
 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, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 260                         pix->width, pix->height,
 261                         (pix->pixelformat & 0xff),
 262                         (pix->pixelformat >>  8) & 0xff,
 263                         (pix->pixelformat >> 16) & 0xff,
 264                         (pix->pixelformat >> 24) & 0xff,
 265                         prt_names(pix->field, v4l2_field_names),
 266                         pix->bytesperline, pix->sizeimage,
 267                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 268                         pix->quantization, pix->xfer_func);
 269                 break;
 270         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 271         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 272                 mp = &p->fmt.pix_mp;
 273                 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 274                         mp->width, mp->height,
 275                         (mp->pixelformat & 0xff),
 276                         (mp->pixelformat >>  8) & 0xff,
 277                         (mp->pixelformat >> 16) & 0xff,
 278                         (mp->pixelformat >> 24) & 0xff,
 279                         prt_names(mp->field, v4l2_field_names),
 280                         mp->colorspace, mp->num_planes, mp->flags,
 281                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 282                 for (i = 0; i < mp->num_planes; i++)
 283                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 284                                         mp->plane_fmt[i].bytesperline,
 285                                         mp->plane_fmt[i].sizeimage);
 286                 break;
 287         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 288         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 289                 win = &p->fmt.win;
 290                 /* Note: we can't print the clip list here since the clips
 291                  * pointer is a userspace pointer, not a kernelspace
 292                  * pointer. */
 293                 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",
 294                         win->w.width, win->w.height, win->w.left, win->w.top,
 295                         prt_names(win->field, v4l2_field_names),
 296                         win->chromakey, win->clipcount, win->clips,
 297                         win->bitmap, win->global_alpha);
 298                 break;
 299         case V4L2_BUF_TYPE_VBI_CAPTURE:
 300         case V4L2_BUF_TYPE_VBI_OUTPUT:
 301                 vbi = &p->fmt.vbi;
 302                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 303                         vbi->sampling_rate, vbi->offset,
 304                         vbi->samples_per_line,
 305                         (vbi->sample_format & 0xff),
 306                         (vbi->sample_format >>  8) & 0xff,
 307                         (vbi->sample_format >> 16) & 0xff,
 308                         (vbi->sample_format >> 24) & 0xff,
 309                         vbi->start[0], vbi->start[1],
 310                         vbi->count[0], vbi->count[1]);
 311                 break;
 312         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 313         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 314                 sliced = &p->fmt.sliced;
 315                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 316                                 sliced->service_set, sliced->io_size);
 317                 for (i = 0; i < 24; i++)
 318                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 319                                 sliced->service_lines[0][i],
 320                                 sliced->service_lines[1][i]);
 321                 break;
 322         case V4L2_BUF_TYPE_SDR_CAPTURE:
 323         case V4L2_BUF_TYPE_SDR_OUTPUT:
 324                 sdr = &p->fmt.sdr;
 325                 pr_cont(", pixelformat=%c%c%c%c\n",
 326                         (sdr->pixelformat >>  0) & 0xff,
 327                         (sdr->pixelformat >>  8) & 0xff,
 328                         (sdr->pixelformat >> 16) & 0xff,
 329                         (sdr->pixelformat >> 24) & 0xff);
 330                 break;
 331         case V4L2_BUF_TYPE_META_CAPTURE:
 332                 meta = &p->fmt.meta;
 333                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 334                         (meta->dataformat >>  0) & 0xff,
 335                         (meta->dataformat >>  8) & 0xff,
 336                         (meta->dataformat >> 16) & 0xff,
 337                         (meta->dataformat >> 24) & 0xff,
 338                         meta->buffersize);
 339                 break;
 340         }
 341 }
 342
 343 static void v4l_print_framebuffer(const void *arg, bool write_only)
 344 {
 345         const struct v4l2_framebuffer *p = arg;
 346
 347         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 348                         p->capability, p->flags, p->base,
 349                         p->fmt.width, p->fmt.height,
 350                         (p->fmt.pixelformat & 0xff),
 351                         (p->fmt.pixelformat >>  8) & 0xff,
 352                         (p->fmt.pixelformat >> 16) & 0xff,
 353                         (p->fmt.pixelformat >> 24) & 0xff,
 354                         p->fmt.bytesperline, p->fmt.sizeimage,
 355                         p->fmt.colorspace);
 356 }
 357
 358 static void v4l_print_buftype(const void *arg, bool write_only)
 359 {
 360         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 361 }
 362
 363 static void v4l_print_modulator(const void *arg, bool write_only)
 364 {
 365         const struct v4l2_modulator *p = arg;
 366
 367         if (write_only)
 368                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 369         else
 370                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 371                         p->index, (int)sizeof(p->name), p->name, p->capability,
 372                         p->rangelow, p->rangehigh, p->txsubchans);
 373 }
 374
 375 static void v4l_print_tuner(const void *arg, bool write_only)
 376 {
 377         const struct v4l2_tuner *p = arg;
 378
 379         if (write_only)
 380                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 381         else
 382                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 383                         p->index, (int)sizeof(p->name), p->name, p->type,
 384                         p->capability, p->rangelow,
 385                         p->rangehigh, p->signal, p->afc,
 386                         p->rxsubchans, p->audmode);
 387 }
 388
 389 static void v4l_print_frequency(const void *arg, bool write_only)
 390 {
 391         const struct v4l2_frequency *p = arg;
 392
 393         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 394                                 p->tuner, p->type, p->frequency);
 395 }
 396
 397 static void v4l_print_standard(const void *arg, bool write_only)
 398 {
 399         const struct v4l2_standard *p = arg;
 400
 401         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 402                 p->index,
 403                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 404                 p->frameperiod.numerator,
 405                 p->frameperiod.denominator,
 406                 p->framelines);
 407 }
 408
 409 static void v4l_print_std(const void *arg, bool write_only)
 410 {
 411         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 412 }
 413
 414 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 415 {
 416         const struct v4l2_hw_freq_seek *p = arg;
 417
 418         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 419                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 420                 p->rangelow, p->rangehigh);
 421 }
 422
 423 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 424 {
 425         const struct v4l2_requestbuffers *p = arg;
 426
 427         pr_cont("count=%d, type=%s, memory=%s\n",
 428                 p->count,
 429                 prt_names(p->type, v4l2_type_names),
 430                 prt_names(p->memory, v4l2_memory_names));
 431 }
 432
 433 static void v4l_print_buffer(const void *arg, bool write_only)
 434 {
 435         const struct v4l2_buffer *p = arg;
 436         const struct v4l2_timecode *tc = &p->timecode;
 437         const struct v4l2_plane *plane;
 438         int i;
 439
 440         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 441                         p->timestamp.tv_sec / 3600,
 442                         (int)(p->timestamp.tv_sec / 60) % 60,
 443                         (int)(p->timestamp.tv_sec % 60),
 444                         (long)p->timestamp.tv_usec,
 445                         p->index,
 446                         prt_names(p->type, v4l2_type_names),
 447                         p->flags, prt_names(p->field, v4l2_field_names),
 448                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 449
 450         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 451                 pr_cont("\n");
 452                 for (i = 0; i < p->length; ++i) {
 453                         plane = &p->m.planes[i];
 454                         printk(KERN_DEBUG
 455                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 456                                 i, plane->bytesused, plane->data_offset,
 457                                 plane->m.userptr, plane->length);
 458                 }
 459         } else {
 460                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 461                         p->bytesused, p->m.userptr, p->length);
 462         }
 463
 464         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 465                         tc->hours, tc->minutes, tc->seconds,
 466                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 467 }
 468
 469 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 470 {
 471         const struct v4l2_exportbuffer *p = arg;
 472
 473         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 474                 p->fd, prt_names(p->type, v4l2_type_names),
 475                 p->index, p->plane, p->flags);
 476 }
 477
 478 static void v4l_print_create_buffers(const void *arg, bool write_only)
 479 {
 480         const struct v4l2_create_buffers *p = arg;
 481
 482         pr_cont("index=%d, count=%d, memory=%s, ",
 483                         p->index, p->count,
 484                         prt_names(p->memory, v4l2_memory_names));
 485         v4l_print_format(&p->format, write_only);
 486 }
 487
 488 static void v4l_print_streamparm(const void *arg, bool write_only)
 489 {
 490         const struct v4l2_streamparm *p = arg;
 491
 492         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 493
 494         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 495             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 496                 const struct v4l2_captureparm *c = &p->parm.capture;
 497
 498                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 499                         c->capability, c->capturemode,
 500                         c->timeperframe.numerator, c->timeperframe.denominator,
 501                         c->extendedmode, c->readbuffers);
 502         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 503                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 504                 const struct v4l2_outputparm *c = &p->parm.output;
 505
 506                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 507                         c->capability, c->outputmode,
 508                         c->timeperframe.numerator, c->timeperframe.denominator,
 509                         c->extendedmode, c->writebuffers);
 510         } else {
 511                 pr_cont("\n");
 512         }
 513 }
 514
 515 static void v4l_print_queryctrl(const void *arg, bool write_only)
 516 {
 517         const struct v4l2_queryctrl *p = arg;
 518
 519         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 520                         p->id, p->type, (int)sizeof(p->name), p->name,
 521                         p->minimum, p->maximum,
 522                         p->step, p->default_value, p->flags);
 523 }
 524
 525 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_query_ext_ctrl *p = arg;
 528
 529         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 530                         p->id, p->type, (int)sizeof(p->name), p->name,
 531                         p->minimum, p->maximum,
 532                         p->step, p->default_value, p->flags,
 533                         p->elem_size, p->elems, p->nr_of_dims,
 534                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 535 }
 536
 537 static void v4l_print_querymenu(const void *arg, bool write_only)
 538 {
 539         const struct v4l2_querymenu *p = arg;
 540
 541         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 542 }
 543
 544 static void v4l_print_control(const void *arg, bool write_only)
 545 {
 546         const struct v4l2_control *p = arg;
 547
 548         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 549 }
 550
 551 static void v4l_print_ext_controls(const void *arg, bool write_only)
 552 {
 553         const struct v4l2_ext_controls *p = arg;
 554         int i;
 555
 556         pr_cont("which=0x%x, count=%d, error_idx=%d",
 557                         p->which, p->count, p->error_idx);
 558         for (i = 0; i < p->count; i++) {
 559                 if (!p->controls[i].size)
 560                         pr_cont(", id/val=0x%x/0x%x",
 561                                 p->controls[i].id, p->controls[i].value);
 562                 else
 563                         pr_cont(", id/size=0x%x/%u",
 564                                 p->controls[i].id, p->controls[i].size);
 565         }
 566         pr_cont("\n");
 567 }
 568
 569 static void v4l_print_cropcap(const void *arg, bool write_only)
 570 {
 571         const struct v4l2_cropcap *p = arg;
 572
 573         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 574                 prt_names(p->type, v4l2_type_names),
 575                 p->bounds.width, p->bounds.height,
 576                 p->bounds.left, p->bounds.top,
 577                 p->defrect.width, p->defrect.height,
 578                 p->defrect.left, p->defrect.top,
 579                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 580 }
 581
 582 static void v4l_print_crop(const void *arg, bool write_only)
 583 {
 584         const struct v4l2_crop *p = arg;
 585
 586         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 587                 prt_names(p->type, v4l2_type_names),
 588                 p->c.width, p->c.height,
 589                 p->c.left, p->c.top);
 590 }
 591
 592 static void v4l_print_selection(const void *arg, bool write_only)
 593 {
 594         const struct v4l2_selection *p = arg;
 595
 596         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 597                 prt_names(p->type, v4l2_type_names),
 598                 p->target, p->flags,
 599                 p->r.width, p->r.height, p->r.left, p->r.top);
 600 }
 601
 602 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 603 {
 604         const struct v4l2_jpegcompression *p = arg;
 605
 606         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 607                 p->quality, p->APPn, p->APP_len,
 608                 p->COM_len, p->jpeg_markers);
 609 }
 610
 611 static void v4l_print_enc_idx(const void *arg, bool write_only)
 612 {
 613         const struct v4l2_enc_idx *p = arg;
 614
 615         pr_cont("entries=%d, entries_cap=%d\n",
 616                         p->entries, p->entries_cap);
 617 }
 618
 619 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 620 {
 621         const struct v4l2_encoder_cmd *p = arg;
 622
 623         pr_cont("cmd=%d, flags=0x%x\n",
 624                         p->cmd, p->flags);
 625 }
 626
 627 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 628 {
 629         const struct v4l2_decoder_cmd *p = arg;
 630
 631         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 632
 633         if (p->cmd == V4L2_DEC_CMD_START)
 634                 pr_info("speed=%d, format=%u\n",
 635                                 p->start.speed, p->start.format);
 636         else if (p->cmd == V4L2_DEC_CMD_STOP)
 637                 pr_info("pts=%llu\n", p->stop.pts);
 638 }
 639
 640 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 641 {
 642         const struct v4l2_dbg_chip_info *p = arg;
 643
 644         pr_cont("type=%u, ", p->match.type);
 645         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 646                 pr_cont("name=%.*s, ",
 647                                 (int)sizeof(p->match.name), p->match.name);
 648         else
 649                 pr_cont("addr=%u, ", p->match.addr);
 650         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 651 }
 652
 653 static void v4l_print_dbg_register(const void *arg, bool write_only)
 654 {
 655         const struct v4l2_dbg_register *p = arg;
 656
 657         pr_cont("type=%u, ", p->match.type);
 658         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 659                 pr_cont("name=%.*s, ",
 660                                 (int)sizeof(p->match.name), p->match.name);
 661         else
 662                 pr_cont("addr=%u, ", p->match.addr);
 663         pr_cont("reg=0x%llx, val=0x%llx\n",
 664                         p->reg, p->val);
 665 }
 666
 667 static void v4l_print_dv_timings(const void *arg, bool write_only)
 668 {
 669         const struct v4l2_dv_timings *p = arg;
 670
 671         switch (p->type) {
 672         case V4L2_DV_BT_656_1120:
 673                 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 674                                 p->bt.interlaced, p->bt.pixelclock,
 675                                 p->bt.width, p->bt.height,
 676                                 p->bt.polarities, p->bt.hfrontporch,
 677                                 p->bt.hsync, p->bt.hbackporch,
 678                                 p->bt.vfrontporch, p->bt.vsync,
 679                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 680                                 p->bt.il_vsync, p->bt.il_vbackporch,
 681                                 p->bt.standards, p->bt.flags);
 682                 break;
 683         default:
 684                 pr_cont("type=%d\n", p->type);
 685                 break;
 686         }
 687 }
 688
 689 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 690 {
 691         const struct v4l2_enum_dv_timings *p = arg;
 692
 693         pr_cont("index=%u, ", p->index);
 694         v4l_print_dv_timings(&p->timings, write_only);
 695 }
 696
 697 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 698 {
 699         const struct v4l2_dv_timings_cap *p = arg;
 700
 701         switch (p->type) {
 702         case V4L2_DV_BT_656_1120:
 703                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 704                         p->bt.min_width, p->bt.max_width,
 705                         p->bt.min_height, p->bt.max_height,
 706                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 707                         p->bt.standards, p->bt.capabilities);
 708                 break;
 709         default:
 710                 pr_cont("type=%u\n", p->type);
 711                 break;
 712         }
 713 }
 714
 715 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 716 {
 717         const struct v4l2_frmsizeenum *p = arg;
 718
 719         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 720                         p->index,
 721                         (p->pixel_format & 0xff),
 722                         (p->pixel_format >>  8) & 0xff,
 723                         (p->pixel_format >> 16) & 0xff,
 724                         (p->pixel_format >> 24) & 0xff,
 725                         p->type);
 726         switch (p->type) {
 727         case V4L2_FRMSIZE_TYPE_DISCRETE:
 728                 pr_cont(", wxh=%ux%u\n",
 729                         p->discrete.width, p->discrete.height);
 730                 break;
 731         case V4L2_FRMSIZE_TYPE_STEPWISE:
 732                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 733                                 p->stepwise.min_width,
 734                                 p->stepwise.min_height,
 735                                 p->stepwise.max_width,
 736                                 p->stepwise.max_height,
 737                                 p->stepwise.step_width,
 738                                 p->stepwise.step_height);
 739                 break;
 740         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 741                 /* fall through */
 742         default:
 743                 pr_cont("\n");
 744                 break;
 745         }
 746 }
 747
 748 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 749 {
 750         const struct v4l2_frmivalenum *p = arg;
 751
 752         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 753                         p->index,
 754                         (p->pixel_format & 0xff),
 755                         (p->pixel_format >>  8) & 0xff,
 756                         (p->pixel_format >> 16) & 0xff,
 757                         (p->pixel_format >> 24) & 0xff,
 758                         p->width, p->height, p->type);
 759         switch (p->type) {
 760         case V4L2_FRMIVAL_TYPE_DISCRETE:
 761                 pr_cont(", fps=%d/%d\n",
 762                                 p->discrete.numerator,
 763                                 p->discrete.denominator);
 764                 break;
 765         case V4L2_FRMIVAL_TYPE_STEPWISE:
 766                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 767                                 p->stepwise.min.numerator,
 768                                 p->stepwise.min.denominator,
 769                                 p->stepwise.max.numerator,
 770                                 p->stepwise.max.denominator,
 771                                 p->stepwise.step.numerator,
 772                                 p->stepwise.step.denominator);
 773                 break;
 774         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 775                 /* fall through */
 776         default:
 777                 pr_cont("\n");
 778                 break;
 779         }
 780 }
 781
 782 static void v4l_print_event(const void *arg, bool write_only)
 783 {
 784         const struct v4l2_event *p = arg;
 785         const struct v4l2_event_ctrl *c;
 786
 787         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 788                         p->type, p->pending, p->sequence, p->id,
 789                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 790         switch (p->type) {
 791         case V4L2_EVENT_VSYNC:
 792                 printk(KERN_DEBUG "field=%s\n",
 793                         prt_names(p->u.vsync.field, v4l2_field_names));
 794                 break;
 795         case V4L2_EVENT_CTRL:
 796                 c = &p->u.ctrl;
 797                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 798                         c->changes, c->type);
 799                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 800                         pr_cont("value64=%lld, ", c->value64);
 801                 else
 802                         pr_cont("value=%d, ", c->value);
 803                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 804                         c->flags, c->minimum, c->maximum,
 805                         c->step, c->default_value);
 806                 break;
 807         case V4L2_EVENT_FRAME_SYNC:
 808                 pr_cont("frame_sequence=%u\n",
 809                         p->u.frame_sync.frame_sequence);
 810                 break;
 811         }
 812 }
 813
 814 static void v4l_print_event_subscription(const void *arg, bool write_only)
 815 {
 816         const struct v4l2_event_subscription *p = arg;
 817
 818         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 819                         p->type, p->id, p->flags);
 820 }
 821
 822 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 823 {
 824         const struct v4l2_sliced_vbi_cap *p = arg;
 825         int i;
 826
 827         pr_cont("type=%s, service_set=0x%08x\n",
 828                         prt_names(p->type, v4l2_type_names), p->service_set);
 829         for (i = 0; i < 24; i++)
 830                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 831                                 p->service_lines[0][i],
 832                                 p->service_lines[1][i]);
 833 }
 834
 835 static void v4l_print_freq_band(const void *arg, bool write_only)
 836 {
 837         const struct v4l2_frequency_band *p = arg;
 838
 839         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 840                         p->tuner, p->type, p->index,
 841                         p->capability, p->rangelow,
 842                         p->rangehigh, p->modulation);
 843 }
 844
 845 static void v4l_print_edid(const void *arg, bool write_only)
 846 {
 847         const struct v4l2_edid *p = arg;
 848
 849         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 850                 p->pad, p->start_block, p->blocks);
 851 }
 852
 853 static void v4l_print_u32(const void *arg, bool write_only)
 854 {
 855         pr_cont("value=%u\n", *(const u32 *)arg);
 856 }
 857
 858 static void v4l_print_newline(const void *arg, bool write_only)
 859 {
 860         pr_cont("\n");
 861 }
 862
 863 static void v4l_print_default(const void *arg, bool write_only)
 864 {
 865         pr_cont("driver-specific ioctl\n");
 866 }
 867
 868 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 869 {
 870         __u32 i;
 871
 872         /* zero the reserved fields */
 873         c->reserved[0] = c->reserved[1] = 0;
 874         for (i = 0; i < c->count; i++)
 875                 c->controls[i].reserved2[0] = 0;
 876
 877         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 878            when using extended controls.
 879            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 880            is it allowed for backwards compatibility.
 881          */
 882         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 883                 return 0;
 884         if (!c->which)
 885                 return 1;
 886         /* Check that all controls are from the same control class. */
 887         for (i = 0; i < c->count; i++) {
 888                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 889                         c->error_idx = i;
 890                         return 0;
 891                 }
 892         }
 893         return 1;
 894 }
 895
 896 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 897 {
 898         struct video_device *vfd = video_devdata(file);
 899         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 900         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 901         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 902         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 903         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 904         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 905         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 906
 907         if (ops == NULL)
 908                 return -EINVAL;
 909
 910         switch (type) {
 911         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 912                 if ((is_vid || is_tch) && is_rx &&
 913                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 914                         return 0;
 915                 break;
 916         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 917                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 918                         return 0;
 919                 break;
 920         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 921                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 922                         return 0;
 923                 break;
 924         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 925                 if (is_vid && is_tx &&
 926                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 930                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 931                         return 0;
 932                 break;
 933         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 934                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 935                         return 0;
 936                 break;
 937         case V4L2_BUF_TYPE_VBI_CAPTURE:
 938                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 939                         return 0;
 940                 break;
 941         case V4L2_BUF_TYPE_VBI_OUTPUT:
 942                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 943                         return 0;
 944                 break;
 945         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 946                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 950                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_SDR_CAPTURE:
 954                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_SDR_OUTPUT:
 958                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 959                         return 0;
 960                 break;
 961         case V4L2_BUF_TYPE_META_CAPTURE:
 962                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
 963                         return 0;
 964                 break;
 965         default:
 966                 break;
 967         }
 968         return -EINVAL;
 969 }
 970
 971 static void v4l_sanitize_format(struct v4l2_format *fmt)
 972 {
 973         unsigned int offset;
 974
 975         /*
 976          * The v4l2_pix_format structure has been extended with fields that were
 977          * not previously required to be set to zero by applications. The priv
 978          * field, when set to a magic value, indicates the the extended fields
 979          * are valid. Otherwise they will contain undefined values. To simplify
 980          * the API towards drivers zero the extended fields and set the priv
 981          * field to the magic value when the extended pixel format structure
 982          * isn't used by applications.
 983          */
 984
 985         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 986             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 987                 return;
 988
 989         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
 990                 return;
 991
 992         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
 993
 994         offset = offsetof(struct v4l2_pix_format, priv)
 995                + sizeof(fmt->fmt.pix.priv);
 996         memset(((void *)&fmt->fmt.pix) + offset, 0,
 997                sizeof(fmt->fmt.pix) - offset);
 998 }
 999
1000 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1001                                 struct file *file, void *fh, void *arg)
1002 {
1003         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1004         struct video_device *vfd = video_devdata(file);
1005         int ret;
1006
1007         cap->version = LINUX_VERSION_CODE;
1008         cap->device_caps = vfd->device_caps;
1009         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1010
1011         ret = ops->vidioc_querycap(file, fh, cap);
1012
1013         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1014         /*
1015          * Drivers MUST fill in device_caps, so check for this and
1016          * warn if it was forgotten.
1017          */
1018         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1019                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1020                 cap->driver, cap->capabilities, cap->device_caps);
1021         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1022
1023         return ret;
1024 }
1025
1026 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1027                                 struct file *file, void *fh, void *arg)
1028 {
1029         struct video_device *vfd = video_devdata(file);
1030         int ret;
1031
1032         ret = v4l_enable_media_source(vfd);
1033         if (ret)
1034                 return ret;
1035         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1036 }
1037
1038 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1039                                 struct file *file, void *fh, void *arg)
1040 {
1041         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1042 }
1043
1044 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1045                                 struct file *file, void *fh, void *arg)
1046 {
1047         struct video_device *vfd;
1048         u32 *p = arg;
1049
1050         vfd = video_devdata(file);
1051         *p = v4l2_prio_max(vfd->prio);
1052         return 0;
1053 }
1054
1055 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1056                                 struct file *file, void *fh, void *arg)
1057 {
1058         struct video_device *vfd;
1059         struct v4l2_fh *vfh;
1060         u32 *p = arg;
1061
1062         vfd = video_devdata(file);
1063         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1064                 return -ENOTTY;
1065         vfh = file->private_data;
1066         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1067 }
1068
1069 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1070                                 struct file *file, void *fh, void *arg)
1071 {
1072         struct video_device *vfd = video_devdata(file);
1073         struct v4l2_input *p = arg;
1074
1075         /*
1076          * We set the flags for CAP_DV_TIMINGS &
1077          * CAP_STD here based on ioctl handler provided by the
1078          * driver. If the driver doesn't support these
1079          * for a specific input, it must override these flags.
1080          */
1081         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1082                 p->capabilities |= V4L2_IN_CAP_STD;
1083
1084         return ops->vidioc_enum_input(file, fh, p);
1085 }
1086
1087 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1088                                 struct file *file, void *fh, void *arg)
1089 {
1090         struct video_device *vfd = video_devdata(file);
1091         struct v4l2_output *p = arg;
1092
1093         /*
1094          * We set the flags for CAP_DV_TIMINGS &
1095          * CAP_STD here based on ioctl handler provided by the
1096          * driver. If the driver doesn't support these
1097          * for a specific output, it must override these flags.
1098          */
1099         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1100                 p->capabilities |= V4L2_OUT_CAP_STD;
1101
1102         return ops->vidioc_enum_output(file, fh, p);
1103 }
1104
1105 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1106 {
1107         const unsigned sz = sizeof(fmt->description);
1108         const char *descr = NULL;
1109         u32 flags = 0;
1110
1111         /*
1112          * We depart from the normal coding style here since the descriptions
1113          * should be aligned so it is easy to see which descriptions will be
1114          * longer than 31 characters (the max length for a description).
1115          * And frankly, this is easier to read anyway.
1116          *
1117          * Note that gcc will use O(log N) comparisons to find the right case.
1118          */
1119         switch (fmt->pixelformat) {
1120         /* Max description length mask: descr = "0123456789012345678901234567890" */
1121         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1122         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1123         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1124         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1125         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1126         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1127         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1128         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1129         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1130         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1131         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1132         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1133         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1134         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1135         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1136         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1137         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1138         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1139         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1140         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1141         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1142         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1143         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1144         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1145         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1146         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1147         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1148         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1149         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1150         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1151         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1152         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1153         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1154         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1155         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1156         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1157         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1158         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1159         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1160         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1161         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1162         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1163         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1164         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1165         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1166         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1167         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1168         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1169         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1170         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1171         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1172         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1173         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1174         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1175         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1176         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1177         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1178         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1179         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1180         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1181         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1182         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1183         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1184         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1185         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1186         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1187         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1188         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1189         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1190         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1191         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1192         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1193         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1194         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1195         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1196         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1197         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1198         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1199         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1200         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1201         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1202         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1203         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1204         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1205         case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1206         case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1207         case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1208         case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1209         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1210         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1211         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1212         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1213         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1214         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1215         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1216         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1217         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1218         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1219         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1220         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1221         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1222         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1223         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1224         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1225         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1226         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1227         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1228         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1229         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1230         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1231         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1232         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1233         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1234         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1235         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1236         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1237         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1238         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1239         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1240         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1241         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1242         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1243         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1244         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1245         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1246         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1247         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1248         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1249         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1250         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1251         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1252         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1253         case V4L2_META_FMT_UVC:         descr = "UVC payload header metadata"; break;
1254
1255         default:
1256                 /* Compressed formats */
1257                 flags = V4L2_FMT_FLAG_COMPRESSED;
1258                 switch (fmt->pixelformat) {
1259                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1260                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1261                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1262                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1263                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1264                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1265                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1266                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1267                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1268                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1269                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1270                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1271                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1272                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1273                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1274                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1275                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1276                 case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1277                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1278                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1279                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1280                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1281                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1282                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1283                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1284                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1285                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1286                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1287                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1288                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1289                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1290                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1291                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1292                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1293                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1294                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1295                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1296                 default:
1297                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1298                         if (fmt->description[0])
1299                                 return;
1300                         flags = 0;
1301                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1302                                         (char)(fmt->pixelformat & 0x7f),
1303                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1304                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1305                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1306                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1307                         break;
1308                 }
1309         }
1310
1311         if (descr)
1312                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1313         fmt->flags = flags;
1314 }
1315
1316 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1317                                 struct file *file, void *fh, void *arg)
1318 {
1319         struct v4l2_fmtdesc *p = arg;
1320         int ret = check_fmt(file, p->type);
1321
1322         if (ret)
1323                 return ret;
1324         ret = -EINVAL;
1325
1326         switch (p->type) {
1327         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1328                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1329                         break;
1330                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1331                 break;
1332         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1333                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1334                         break;
1335                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1336                 break;
1337         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1338                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1339                         break;
1340                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1341                 break;
1342         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1343                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1344                         break;
1345                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1346                 break;
1347         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1348                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1349                         break;
1350                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1351                 break;
1352         case V4L2_BUF_TYPE_SDR_CAPTURE:
1353                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1354                         break;
1355                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1356                 break;
1357         case V4L2_BUF_TYPE_SDR_OUTPUT:
1358                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1359                         break;
1360                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1361                 break;
1362         case V4L2_BUF_TYPE_META_CAPTURE:
1363                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1364                         break;
1365                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1366                 break;
1367         }
1368         if (ret == 0)
1369                 v4l_fill_fmtdesc(p);
1370         return ret;
1371 }
1372
1373 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1374                                 struct file *file, void *fh, void *arg)
1375 {
1376         struct v4l2_format *p = arg;
1377         int ret = check_fmt(file, p->type);
1378
1379         if (ret)
1380                 return ret;
1381
1382         /*
1383          * fmt can't be cleared for these overlay types due to the 'clips'
1384          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1385          * Those are provided by the user. So handle these two overlay types
1386          * first, and then just do a simple memset for the other types.
1387          */
1388         switch (p->type) {
1389         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1390         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1391                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1392                 u32 clipcount = p->fmt.win.clipcount;
1393                 void __user *bitmap = p->fmt.win.bitmap;
1394
1395                 memset(&p->fmt, 0, sizeof(p->fmt));
1396                 p->fmt.win.clips = clips;
1397                 p->fmt.win.clipcount = clipcount;
1398                 p->fmt.win.bitmap = bitmap;
1399                 break;
1400         }
1401         default:
1402                 memset(&p->fmt, 0, sizeof(p->fmt));
1403                 break;
1404         }
1405
1406         switch (p->type) {
1407         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1408                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1409                         break;
1410                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1411                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1412                 /* just in case the driver zeroed it again */
1413                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1414                 return ret;
1415         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1416                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1417         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1418                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1419         case V4L2_BUF_TYPE_VBI_CAPTURE:
1420                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1421         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1422                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1423         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1424                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1425                         break;
1426                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1427                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1428                 /* just in case the driver zeroed it again */
1429                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1430                 return ret;
1431         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1432                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1433         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1434                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1435         case V4L2_BUF_TYPE_VBI_OUTPUT:
1436                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1437         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1438                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1439         case V4L2_BUF_TYPE_SDR_CAPTURE:
1440                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1441         case V4L2_BUF_TYPE_SDR_OUTPUT:
1442                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1443         case V4L2_BUF_TYPE_META_CAPTURE:
1444                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1445         }
1446         return -EINVAL;
1447 }
1448
1449 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1450 {
1451         /*
1452          * The v4l2_pix_format structure contains fields that make no sense for
1453          * touch. Set them to default values in this case.
1454          */
1455
1456         p->field = V4L2_FIELD_NONE;
1457         p->colorspace = V4L2_COLORSPACE_RAW;
1458         p->flags = 0;
1459         p->ycbcr_enc = 0;
1460         p->quantization = 0;
1461         p->xfer_func = 0;
1462 }
1463
1464 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1465                                 struct file *file, void *fh, void *arg)
1466 {
1467         struct v4l2_format *p = arg;
1468         struct video_device *vfd = video_devdata(file);
1469         int ret = check_fmt(file, p->type);
1470
1471         if (ret)
1472                 return ret;
1473
1474         ret = v4l_enable_media_source(vfd);
1475         if (ret)
1476                 return ret;
1477         v4l_sanitize_format(p);
1478
1479         switch (p->type) {
1480         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1481                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1482                         break;
1483                 CLEAR_AFTER_FIELD(p, fmt.pix);
1484                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1485                 /* just in case the driver zeroed it again */
1486                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1487                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1488                         v4l_pix_format_touch(&p->fmt.pix);
1489                 return ret;
1490         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1491                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1492                         break;
1493                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1494                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1495         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1496                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1497                         break;
1498                 CLEAR_AFTER_FIELD(p, fmt.win);
1499                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1500         case V4L2_BUF_TYPE_VBI_CAPTURE:
1501                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1502                         break;
1503                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1504                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1505         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1506                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1507                         break;
1508                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1509                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1510         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1511                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1512                         break;
1513                 CLEAR_AFTER_FIELD(p, fmt.pix);
1514                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1515                 /* just in case the driver zeroed it again */
1516                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1517                 return ret;
1518         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1519                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1520                         break;
1521                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1522                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1523         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1524                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1525                         break;
1526                 CLEAR_AFTER_FIELD(p, fmt.win);
1527                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1528         case V4L2_BUF_TYPE_VBI_OUTPUT:
1529                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1530                         break;
1531                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1532                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1533         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1534                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1535                         break;
1536                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1537                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1538         case V4L2_BUF_TYPE_SDR_CAPTURE:
1539                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1540                         break;
1541                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1542                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1543         case V4L2_BUF_TYPE_SDR_OUTPUT:
1544                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1545                         break;
1546                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1547                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1548         case V4L2_BUF_TYPE_META_CAPTURE:
1549                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1550                         break;
1551                 CLEAR_AFTER_FIELD(p, fmt.meta);
1552                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1553         }
1554         return -EINVAL;
1555 }
1556
1557 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1558                                 struct file *file, void *fh, void *arg)
1559 {
1560         struct v4l2_format *p = arg;
1561         int ret = check_fmt(file, p->type);
1562
1563         if (ret)
1564                 return ret;
1565
1566         v4l_sanitize_format(p);
1567
1568         switch (p->type) {
1569         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1570                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1571                         break;
1572                 CLEAR_AFTER_FIELD(p, fmt.pix);
1573                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1574                 /* just in case the driver zeroed it again */
1575                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1576                 return ret;
1577         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1578                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1579                         break;
1580                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1581                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1582         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1583                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1584                         break;
1585                 CLEAR_AFTER_FIELD(p, fmt.win);
1586                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1587         case V4L2_BUF_TYPE_VBI_CAPTURE:
1588                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1589                         break;
1590                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1591                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1592         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1593                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1594                         break;
1595                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1596                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1597         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1598                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1599                         break;
1600                 CLEAR_AFTER_FIELD(p, fmt.pix);
1601                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1602                 /* just in case the driver zeroed it again */
1603                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1604                 return ret;
1605         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1606                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1607                         break;
1608                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1609                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1610         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1611                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1612                         break;
1613                 CLEAR_AFTER_FIELD(p, fmt.win);
1614                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1615         case V4L2_BUF_TYPE_VBI_OUTPUT:
1616                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1617                         break;
1618                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1619                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1620         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1621                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1622                         break;
1623                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1624                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1625         case V4L2_BUF_TYPE_SDR_CAPTURE:
1626                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1627                         break;
1628                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1629                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1630         case V4L2_BUF_TYPE_SDR_OUTPUT:
1631                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1632                         break;
1633                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1634                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1635         case V4L2_BUF_TYPE_META_CAPTURE:
1636                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1637                         break;
1638                 CLEAR_AFTER_FIELD(p, fmt.meta);
1639                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1640         }
1641         return -EINVAL;
1642 }
1643
1644 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1645                                 struct file *file, void *fh, void *arg)
1646 {
1647         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1648 }
1649
1650 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1651                                 struct file *file, void *fh, void *arg)
1652 {
1653         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1654 }
1655
1656 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1657                                 struct file *file, void *fh, void *arg)
1658 {
1659         struct video_device *vfd = video_devdata(file);
1660         struct v4l2_tuner *p = arg;
1661         int err;
1662
1663         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1664                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1665         err = ops->vidioc_g_tuner(file, fh, p);
1666         if (!err)
1667                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1668         return err;
1669 }
1670
1671 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1672                                 struct file *file, void *fh, void *arg)
1673 {
1674         struct video_device *vfd = video_devdata(file);
1675         struct v4l2_tuner *p = arg;
1676         int ret;
1677
1678         ret = v4l_enable_media_source(vfd);
1679         if (ret)
1680                 return ret;
1681         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1682                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1683         return ops->vidioc_s_tuner(file, fh, p);
1684 }
1685
1686 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1687                                 struct file *file, void *fh, void *arg)
1688 {
1689         struct video_device *vfd = video_devdata(file);
1690         struct v4l2_modulator *p = arg;
1691         int err;
1692
1693         if (vfd->vfl_type == VFL_TYPE_RADIO)
1694                 p->type = V4L2_TUNER_RADIO;
1695
1696         err = ops->vidioc_g_modulator(file, fh, p);
1697         if (!err)
1698                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1699         return err;
1700 }
1701
1702 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1703                                 struct file *file, void *fh, void *arg)
1704 {
1705         struct video_device *vfd = video_devdata(file);
1706         struct v4l2_modulator *p = arg;
1707
1708         if (vfd->vfl_type == VFL_TYPE_RADIO)
1709                 p->type = V4L2_TUNER_RADIO;
1710
1711         return ops->vidioc_s_modulator(file, fh, p);
1712 }
1713
1714 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1715                                 struct file *file, void *fh, void *arg)
1716 {
1717         struct video_device *vfd = video_devdata(file);
1718         struct v4l2_frequency *p = arg;
1719
1720         if (vfd->vfl_type == VFL_TYPE_SDR)
1721                 p->type = V4L2_TUNER_SDR;
1722         else
1723                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1724                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1725         return ops->vidioc_g_frequency(file, fh, p);
1726 }
1727
1728 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1729                                 struct file *file, void *fh, void *arg)
1730 {
1731         struct video_device *vfd = video_devdata(file);
1732         const struct v4l2_frequency *p = arg;
1733         enum v4l2_tuner_type type;
1734         int ret;
1735
1736         ret = v4l_enable_media_source(vfd);
1737         if (ret)
1738                 return ret;
1739         if (vfd->vfl_type == VFL_TYPE_SDR) {
1740                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1741                         return -EINVAL;
1742         } else {
1743                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1744                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1745                 if (type != p->type)
1746                         return -EINVAL;
1747         }
1748         return ops->vidioc_s_frequency(file, fh, p);
1749 }
1750
1751 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1752                                 struct file *file, void *fh, void *arg)
1753 {
1754         struct video_device *vfd = video_devdata(file);
1755         struct v4l2_standard *p = arg;
1756         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1757         unsigned int index = p->index, i, j = 0;
1758         const char *descr = "";
1759
1760         /* Return -ENODATA if the tvnorms for the current input
1761            or output is 0, meaning that it doesn't support this API. */
1762         if (id == 0)
1763                 return -ENODATA;
1764
1765         /* Return norm array in a canonical way */
1766         for (i = 0; i <= index && id; i++) {
1767                 /* last std value in the standards array is 0, so this
1768                    while always ends there since (id & 0) == 0. */
1769                 while ((id & standards[j].std) != standards[j].std)
1770                         j++;
1771                 curr_id = standards[j].std;
1772                 descr = standards[j].descr;
1773                 j++;
1774                 if (curr_id == 0)
1775                         break;
1776                 if (curr_id != V4L2_STD_PAL &&
1777                                 curr_id != V4L2_STD_SECAM &&
1778                                 curr_id != V4L2_STD_NTSC)
1779                         id &= ~curr_id;
1780         }
1781         if (i <= index)
1782                 return -EINVAL;
1783
1784         v4l2_video_std_construct(p, curr_id, descr);
1785         return 0;
1786 }
1787
1788 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1789                                 struct file *file, void *fh, void *arg)
1790 {
1791         struct video_device *vfd = video_devdata(file);
1792         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1793         int ret;
1794
1795         ret = v4l_enable_media_source(vfd);
1796         if (ret)
1797                 return ret;
1798         norm = id & vfd->tvnorms;
1799         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1800                 return -EINVAL;
1801
1802         /* Calls the specific handler */
1803         return ops->vidioc_s_std(file, fh, norm);
1804 }
1805
1806 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1807                                 struct file *file, void *fh, void *arg)
1808 {
1809         struct video_device *vfd = video_devdata(file);
1810         v4l2_std_id *p = arg;
1811         int ret;
1812
1813         ret = v4l_enable_media_source(vfd);
1814         if (ret)
1815                 return ret;
1816         /*
1817          * If no signal is detected, then the driver should return
1818          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1819          * any standards that do not apply removed.
1820          *
1821          * This means that tuners, audio and video decoders can join
1822          * their efforts to improve the standards detection.
1823          */
1824         *p = vfd->tvnorms;
1825         return ops->vidioc_querystd(file, fh, arg);
1826 }
1827
1828 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1829                                 struct file *file, void *fh, void *arg)
1830 {
1831         struct video_device *vfd = video_devdata(file);
1832         struct v4l2_hw_freq_seek *p = arg;
1833         enum v4l2_tuner_type type;
1834         int ret;
1835
1836         ret = v4l_enable_media_source(vfd);
1837         if (ret)
1838                 return ret;
1839         /* s_hw_freq_seek is not supported for SDR for now */
1840         if (vfd->vfl_type == VFL_TYPE_SDR)
1841                 return -EINVAL;
1842
1843         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1844                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1845         if (p->type != type)
1846                 return -EINVAL;
1847         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1848 }
1849
1850 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1851                                 struct file *file, void *fh, void *arg)
1852 {
1853         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1854 }
1855
1856 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1857                                 struct file *file, void *fh, void *arg)
1858 {
1859         struct v4l2_requestbuffers *p = arg;
1860         int ret = check_fmt(file, p->type);
1861
1862         if (ret)
1863                 return ret;
1864
1865         CLEAR_AFTER_FIELD(p, memory);
1866
1867         return ops->vidioc_reqbufs(file, fh, p);
1868 }
1869
1870 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1871                                 struct file *file, void *fh, void *arg)
1872 {
1873         struct v4l2_buffer *p = arg;
1874         int ret = check_fmt(file, p->type);
1875
1876         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1877 }
1878
1879 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1880                                 struct file *file, void *fh, void *arg)
1881 {
1882         struct v4l2_buffer *p = arg;
1883         int ret = check_fmt(file, p->type);
1884
1885         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1886 }
1887
1888 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1889                                 struct file *file, void *fh, void *arg)
1890 {
1891         struct v4l2_buffer *p = arg;
1892         int ret = check_fmt(file, p->type);
1893
1894         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1895 }
1896
1897 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1898                                 struct file *file, void *fh, void *arg)
1899 {
1900         struct v4l2_create_buffers *create = arg;
1901         int ret = check_fmt(file, create->format.type);
1902
1903         if (ret)
1904                 return ret;
1905
1906         CLEAR_AFTER_FIELD(create, format);
1907
1908         v4l_sanitize_format(&create->format);
1909
1910         ret = ops->vidioc_create_bufs(file, fh, create);
1911
1912         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1913             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1914                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1915
1916         return ret;
1917 }
1918
1919 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1920                                 struct file *file, void *fh, void *arg)
1921 {
1922         struct v4l2_buffer *b = arg;
1923         int ret = check_fmt(file, b->type);
1924
1925         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1926 }
1927
1928 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1929                                 struct file *file, void *fh, void *arg)
1930 {
1931         struct v4l2_streamparm *p = arg;
1932         v4l2_std_id std;
1933         int ret = check_fmt(file, p->type);
1934
1935         if (ret)
1936                 return ret;
1937         if (ops->vidioc_g_parm)
1938                 return ops->vidioc_g_parm(file, fh, p);
1939         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1940             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1941                 return -EINVAL;
1942         p->parm.capture.readbuffers = 2;
1943         ret = ops->vidioc_g_std(file, fh, &std);
1944         if (ret == 0)
1945                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1946         return ret;
1947 }
1948
1949 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1950                                 struct file *file, void *fh, void *arg)
1951 {
1952         struct v4l2_streamparm *p = arg;
1953         int ret = check_fmt(file, p->type);
1954
1955         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1956 }
1957
1958 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1959                                 struct file *file, void *fh, void *arg)
1960 {
1961         struct video_device *vfd = video_devdata(file);
1962         struct v4l2_queryctrl *p = arg;
1963         struct v4l2_fh *vfh =
1964                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1965
1966         if (vfh && vfh->ctrl_handler)
1967                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1968         if (vfd->ctrl_handler)
1969                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1970         if (ops->vidioc_queryctrl)
1971                 return ops->vidioc_queryctrl(file, fh, p);
1972         return -ENOTTY;
1973 }
1974
1975 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1976                                 struct file *file, void *fh, void *arg)
1977 {
1978         struct video_device *vfd = video_devdata(file);
1979         struct v4l2_query_ext_ctrl *p = arg;
1980         struct v4l2_fh *vfh =
1981                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1982
1983         if (vfh && vfh->ctrl_handler)
1984                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1985         if (vfd->ctrl_handler)
1986                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1987         if (ops->vidioc_query_ext_ctrl)
1988                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1989         return -ENOTTY;
1990 }
1991
1992 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1993                                 struct file *file, void *fh, void *arg)
1994 {
1995         struct video_device *vfd = video_devdata(file);
1996         struct v4l2_querymenu *p = arg;
1997         struct v4l2_fh *vfh =
1998                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1999
2000         if (vfh && vfh->ctrl_handler)
2001                 return v4l2_querymenu(vfh->ctrl_handler, p);
2002         if (vfd->ctrl_handler)
2003                 return v4l2_querymenu(vfd->ctrl_handler, p);
2004         if (ops->vidioc_querymenu)
2005                 return ops->vidioc_querymenu(file, fh, p);
2006         return -ENOTTY;
2007 }
2008
2009 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2010                                 struct file *file, void *fh, void *arg)
2011 {
2012         struct video_device *vfd = video_devdata(file);
2013         struct v4l2_control *p = arg;
2014         struct v4l2_fh *vfh =
2015                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2016         struct v4l2_ext_controls ctrls;
2017         struct v4l2_ext_control ctrl;
2018
2019         if (vfh && vfh->ctrl_handler)
2020                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2021         if (vfd->ctrl_handler)
2022                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2023         if (ops->vidioc_g_ctrl)
2024                 return ops->vidioc_g_ctrl(file, fh, p);
2025         if (ops->vidioc_g_ext_ctrls == NULL)
2026                 return -ENOTTY;
2027
2028         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2029         ctrls.count = 1;
2030         ctrls.controls = &ctrl;
2031         ctrl.id = p->id;
2032         ctrl.value = p->value;
2033         if (check_ext_ctrls(&ctrls, 1)) {
2034                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2035
2036                 if (ret == 0)
2037                         p->value = ctrl.value;
2038                 return ret;
2039         }
2040         return -EINVAL;
2041 }
2042
2043 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2044                                 struct file *file, void *fh, void *arg)
2045 {
2046         struct video_device *vfd = video_devdata(file);
2047         struct v4l2_control *p = arg;
2048         struct v4l2_fh *vfh =
2049                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2050         struct v4l2_ext_controls ctrls;
2051         struct v4l2_ext_control ctrl;
2052
2053         if (vfh && vfh->ctrl_handler)
2054                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2055         if (vfd->ctrl_handler)
2056                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2057         if (ops->vidioc_s_ctrl)
2058                 return ops->vidioc_s_ctrl(file, fh, p);
2059         if (ops->vidioc_s_ext_ctrls == NULL)
2060                 return -ENOTTY;
2061
2062         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2063         ctrls.count = 1;
2064         ctrls.controls = &ctrl;
2065         ctrl.id = p->id;
2066         ctrl.value = p->value;
2067         if (check_ext_ctrls(&ctrls, 1))
2068                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2069         return -EINVAL;
2070 }
2071
2072 static int v4l_g_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_g_ext_ctrls(vfh->ctrl_handler, p);
2083         if (vfd->ctrl_handler)
2084                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2085         if (ops->vidioc_g_ext_ctrls == NULL)
2086                 return -ENOTTY;
2087         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2088                                         -EINVAL;
2089 }
2090
2091 static int v4l_s_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_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2102         if (vfd->ctrl_handler)
2103                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2104         if (ops->vidioc_s_ext_ctrls == NULL)
2105                 return -ENOTTY;
2106         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2107                                         -EINVAL;
2108 }
2109
2110 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2111                                 struct file *file, void *fh, void *arg)
2112 {
2113         struct video_device *vfd = video_devdata(file);
2114         struct v4l2_ext_controls *p = arg;
2115         struct v4l2_fh *vfh =
2116                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2117
2118         p->error_idx = p->count;
2119         if (vfh && vfh->ctrl_handler)
2120                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2121         if (vfd->ctrl_handler)
2122                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2123         if (ops->vidioc_try_ext_ctrls == NULL)
2124                 return -ENOTTY;
2125         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2126                                         -EINVAL;
2127 }
2128
2129 /*
2130  * The selection API specified originally that the _MPLANE buffer types
2131  * shouldn't be used. The reasons for this are lost in the mists of time
2132  * (or just really crappy memories). Regardless, this is really annoying
2133  * for userspace. So to keep things simple we map _MPLANE buffer types
2134  * to their 'regular' counterparts before calling the driver. And we
2135  * restore it afterwards. This way applications can use either buffer
2136  * type and drivers don't need to check for both.
2137  */
2138 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2139                            struct file *file, void *fh, void *arg)
2140 {
2141         struct v4l2_selection *p = arg;
2142         u32 old_type = p->type;
2143         int ret;
2144
2145         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2146                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2147         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2148                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2149         ret = ops->vidioc_g_selection(file, fh, p);
2150         p->type = old_type;
2151         return ret;
2152 }
2153
2154 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2155                            struct file *file, void *fh, void *arg)
2156 {
2157         struct v4l2_selection *p = arg;
2158         u32 old_type = p->type;
2159         int ret;
2160
2161         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2162                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2163         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2164                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2165         ret = ops->vidioc_s_selection(file, fh, p);
2166         p->type = old_type;
2167         return ret;
2168 }
2169
2170 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2171                                 struct file *file, void *fh, void *arg)
2172 {
2173         struct v4l2_crop *p = arg;
2174         struct v4l2_selection s = {
2175                 .type = p->type,
2176         };
2177         int ret;
2178
2179         if (ops->vidioc_g_crop)
2180                 return ops->vidioc_g_crop(file, fh, p);
2181         /* simulate capture crop using selection api */
2182
2183         /* crop means compose for output devices */
2184         if (V4L2_TYPE_IS_OUTPUT(p->type))
2185                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2186         else
2187                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2188
2189         ret = v4l_g_selection(ops, file, fh, &s);
2190
2191         /* copying results to old structure on success */
2192         if (!ret)
2193                 p->c = s.r;
2194         return ret;
2195 }
2196
2197 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2198                                 struct file *file, void *fh, void *arg)
2199 {
2200         struct v4l2_crop *p = arg;
2201         struct v4l2_selection s = {
2202                 .type = p->type,
2203                 .r = p->c,
2204         };
2205
2206         if (ops->vidioc_s_crop)
2207                 return ops->vidioc_s_crop(file, fh, p);
2208         /* simulate capture crop using selection api */
2209
2210         /* crop means compose for output devices */
2211         if (V4L2_TYPE_IS_OUTPUT(p->type))
2212                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2213         else
2214                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2215
2216         return v4l_s_selection(ops, file, fh, &s);
2217 }
2218
2219 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2220                                 struct file *file, void *fh, void *arg)
2221 {
2222         struct v4l2_cropcap *p = arg;
2223         struct v4l2_selection s = { .type = p->type };
2224         int ret = 0;
2225
2226         /* setting trivial pixelaspect */
2227         p->pixelaspect.numerator = 1;
2228         p->pixelaspect.denominator = 1;
2229
2230         /*
2231          * The determine_valid_ioctls() call already should ensure
2232          * that this can never happen, but just in case...
2233          */
2234         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2235                 return -ENOTTY;
2236
2237         if (ops->vidioc_cropcap)
2238                 ret = ops->vidioc_cropcap(file, fh, p);
2239
2240         if (!ops->vidioc_g_selection)
2241                 return ret;
2242
2243         /*
2244          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2245          * square pixel aspect ratio in that case.
2246          */
2247         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2248                 return ret;
2249
2250         /* Use g_selection() to fill in the bounds and defrect rectangles */
2251
2252         /* obtaining bounds */
2253         if (V4L2_TYPE_IS_OUTPUT(p->type))
2254                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2255         else
2256                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2257
2258         ret = v4l_g_selection(ops, file, fh, &s);
2259         if (ret)
2260                 return ret;
2261         p->bounds = s.r;
2262
2263         /* obtaining defrect */
2264         if (V4L2_TYPE_IS_OUTPUT(p->type))
2265                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2266         else
2267                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2268
2269         ret = v4l_g_selection(ops, file, fh, &s);
2270         if (ret)
2271                 return ret;
2272         p->defrect = s.r;
2273
2274         return 0;
2275 }
2276
2277 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2278                                 struct file *file, void *fh, void *arg)
2279 {
2280         struct video_device *vfd = video_devdata(file);
2281         int ret;
2282
2283         if (vfd->v4l2_dev)
2284                 pr_info("%s: =================  START STATUS  =================\n",
2285                         vfd->v4l2_dev->name);
2286         ret = ops->vidioc_log_status(file, fh);
2287         if (vfd->v4l2_dev)
2288                 pr_info("%s: ==================  END STATUS  ==================\n",
2289                         vfd->v4l2_dev->name);
2290         return ret;
2291 }
2292
2293 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2294                                 struct file *file, void *fh, void *arg)
2295 {
2296 #ifdef CONFIG_VIDEO_ADV_DEBUG
2297         struct v4l2_dbg_register *p = arg;
2298         struct video_device *vfd = video_devdata(file);
2299         struct v4l2_subdev *sd;
2300         int idx = 0;
2301
2302         if (!capable(CAP_SYS_ADMIN))
2303                 return -EPERM;
2304         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2305                 if (vfd->v4l2_dev == NULL)
2306                         return -EINVAL;
2307                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2308                         if (p->match.addr == idx++)
2309                                 return v4l2_subdev_call(sd, core, g_register, p);
2310                 return -EINVAL;
2311         }
2312         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2313             (ops->vidioc_g_chip_info || p->match.addr == 0))
2314                 return ops->vidioc_g_register(file, fh, p);
2315         return -EINVAL;
2316 #else
2317         return -ENOTTY;
2318 #endif
2319 }
2320
2321 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2322                                 struct file *file, void *fh, void *arg)
2323 {
2324 #ifdef CONFIG_VIDEO_ADV_DEBUG
2325         const struct v4l2_dbg_register *p = arg;
2326         struct video_device *vfd = video_devdata(file);
2327         struct v4l2_subdev *sd;
2328         int idx = 0;
2329
2330         if (!capable(CAP_SYS_ADMIN))
2331                 return -EPERM;
2332         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2333                 if (vfd->v4l2_dev == NULL)
2334                         return -EINVAL;
2335                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2336                         if (p->match.addr == idx++)
2337                                 return v4l2_subdev_call(sd, core, s_register, p);
2338                 return -EINVAL;
2339         }
2340         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2341             (ops->vidioc_g_chip_info || p->match.addr == 0))
2342                 return ops->vidioc_s_register(file, fh, p);
2343         return -EINVAL;
2344 #else
2345         return -ENOTTY;
2346 #endif
2347 }
2348
2349 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2350                                 struct file *file, void *fh, void *arg)
2351 {
2352 #ifdef CONFIG_VIDEO_ADV_DEBUG
2353         struct video_device *vfd = video_devdata(file);
2354         struct v4l2_dbg_chip_info *p = arg;
2355         struct v4l2_subdev *sd;
2356         int idx = 0;
2357
2358         switch (p->match.type) {
2359         case V4L2_CHIP_MATCH_BRIDGE:
2360                 if (ops->vidioc_s_register)
2361                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2362                 if (ops->vidioc_g_register)
2363                         p->flags |= V4L2_CHIP_FL_READABLE;
2364                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2365                 if (ops->vidioc_g_chip_info)
2366                         return ops->vidioc_g_chip_info(file, fh, arg);
2367                 if (p->match.addr)
2368                         return -EINVAL;
2369                 return 0;
2370
2371         case V4L2_CHIP_MATCH_SUBDEV:
2372                 if (vfd->v4l2_dev == NULL)
2373                         break;
2374                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2375                         if (p->match.addr != idx++)
2376                                 continue;
2377                         if (sd->ops->core && sd->ops->core->s_register)
2378                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2379                         if (sd->ops->core && sd->ops->core->g_register)
2380                                 p->flags |= V4L2_CHIP_FL_READABLE;
2381                         strlcpy(p->name, sd->name, sizeof(p->name));
2382                         return 0;
2383                 }
2384                 break;
2385         }
2386         return -EINVAL;
2387 #else
2388         return -ENOTTY;
2389 #endif
2390 }
2391
2392 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2393                                 struct file *file, void *fh, void *arg)
2394 {
2395         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2396 }
2397
2398 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2399                                 struct file *file, void *fh, void *arg)
2400 {
2401         return ops->vidioc_subscribe_event(fh, arg);
2402 }
2403
2404 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2405                                 struct file *file, void *fh, void *arg)
2406 {
2407         return ops->vidioc_unsubscribe_event(fh, arg);
2408 }
2409
2410 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2411                                 struct file *file, void *fh, void *arg)
2412 {
2413         struct v4l2_sliced_vbi_cap *p = arg;
2414         int ret = check_fmt(file, p->type);
2415
2416         if (ret)
2417                 return ret;
2418
2419         /* Clear up to type, everything after type is zeroed already */
2420         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2421
2422         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2423 }
2424
2425 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2426                                 struct file *file, void *fh, void *arg)
2427 {
2428         struct video_device *vfd = video_devdata(file);
2429         struct v4l2_frequency_band *p = arg;
2430         enum v4l2_tuner_type type;
2431         int err;
2432
2433         if (vfd->vfl_type == VFL_TYPE_SDR) {
2434                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2435                         return -EINVAL;
2436                 type = p->type;
2437         } else {
2438                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2439                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2440                 if (type != p->type)
2441                         return -EINVAL;
2442         }
2443         if (ops->vidioc_enum_freq_bands) {
2444                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2445                 if (err != -ENOTTY)
2446                         return err;
2447         }
2448         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2449                 struct v4l2_tuner t = {
2450                         .index = p->tuner,
2451                         .type = type,
2452                 };
2453
2454                 if (p->index)
2455                         return -EINVAL;
2456                 err = ops->vidioc_g_tuner(file, fh, &t);
2457                 if (err)
2458                         return err;
2459                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2460                 p->rangelow = t.rangelow;
2461                 p->rangehigh = t.rangehigh;
2462                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2463                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2464                 return 0;
2465         }
2466         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2467                 struct v4l2_modulator m = {
2468                         .index = p->tuner,
2469                 };
2470
2471                 if (type != V4L2_TUNER_RADIO)
2472                         return -EINVAL;
2473                 if (p->index)
2474                         return -EINVAL;
2475                 err = ops->vidioc_g_modulator(file, fh, &m);
2476                 if (err)
2477                         return err;
2478                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2479                 p->rangelow = m.rangelow;
2480                 p->rangehigh = m.rangehigh;
2481                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2482                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2483                 return 0;
2484         }
2485         return -ENOTTY;
2486 }
2487
2488 struct v4l2_ioctl_info {
2489         unsigned int ioctl;
2490         u32 flags;
2491         const char * const name;
2492         union {
2493                 u32 offset;
2494                 int (*func)(const struct v4l2_ioctl_ops *ops,
2495                                 struct file *file, void *fh, void *p);
2496         } u;
2497         void (*debug)(const void *arg, bool write_only);
2498 };
2499
2500 /* This control needs a priority check */
2501 #define INFO_FL_PRIO            (1 << 0)
2502 /* This control can be valid if the filehandle passes a control handler. */
2503 #define INFO_FL_CTRL            (1 << 1)
2504 /* This is a standard ioctl, no need for special code */
2505 #define INFO_FL_STD             (1 << 2)
2506 /* This is ioctl has its own function */
2507 #define INFO_FL_FUNC            (1 << 3)
2508 /* Queuing ioctl */
2509 #define INFO_FL_QUEUE           (1 << 4)
2510 /* Always copy back result, even on error */
2511 #define INFO_FL_ALWAYS_COPY     (1 << 5)
2512 /* Zero struct from after the field to the end */
2513 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2514         ((offsetof(struct v4l2_struct, field) +                 \
2515           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2516 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2517
2518 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2519         [_IOC_NR(_ioctl)] = {                                           \
2520                 .ioctl = _ioctl,                                        \
2521                 .flags = _flags | INFO_FL_STD,                          \
2522                 .name = #_ioctl,                                        \
2523                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2524                 .debug = _debug,                                        \
2525         }
2526
2527 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2528         [_IOC_NR(_ioctl)] = {                                           \
2529                 .ioctl = _ioctl,                                        \
2530                 .flags = _flags | INFO_FL_FUNC,                         \
2531                 .name = #_ioctl,                                        \
2532                 .u.func = _func,                                        \
2533                 .debug = _debug,                                        \
2534         }
2535
2536 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2537         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2538         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2539         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2540         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2541         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2542         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2543         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2544         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2545         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2546         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2547         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2548         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2549         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2550         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2551         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2552         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2553         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2554         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2555         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2556         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2557         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2558         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2559         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2560         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2561         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2562         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2563         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2564         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2565         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2566         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2567         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2568         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2569         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2570         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2571         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2572         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2573         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2574         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2575         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2576         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2577         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2578         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2579         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2580         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2581         IOCTL_INFO_FNC(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2582         IOCTL_INFO_FNC(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2583         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2584         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2585         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2586         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2587         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2588         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2589         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2590         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2591         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)),
2592         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2593         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2594         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2595         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2596         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2597         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2598         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2599         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2600         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2601         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2602         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2603         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2604         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2605         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2606         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2607         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2608         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2609         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2610         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2611         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2612         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2613         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2614         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2615         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2616         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2617         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)),
2618         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)),
2619 };
2620 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2621
2622 bool v4l2_is_known_ioctl(unsigned int cmd)
2623 {
2624         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2625                 return false;
2626         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2627 }
2628
2629 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2630 {
2631         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2632                 return vdev->lock;
2633         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2634                 return NULL;
2635         if (vdev->queue && vdev->queue->lock &&
2636                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2637                 return vdev->queue->lock;
2638         return vdev->lock;
2639 }
2640
2641 /* Common ioctl debug function. This function can be used by
2642    external ioctl messages as well as internal V4L ioctl */
2643 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2644 {
2645         const char *dir, *type;
2646
2647         if (prefix)
2648                 printk(KERN_DEBUG "%s: ", prefix);
2649
2650         switch (_IOC_TYPE(cmd)) {
2651         case 'd':
2652                 type = "v4l2_int";
2653                 break;
2654         case 'V':
2655                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2656                         type = "v4l2";
2657                         break;
2658                 }
2659                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2660                 return;
2661         default:
2662                 type = "unknown";
2663                 break;
2664         }
2665
2666         switch (_IOC_DIR(cmd)) {
2667         case _IOC_NONE:              dir = "--"; break;
2668         case _IOC_READ:              dir = "r-"; break;
2669         case _IOC_WRITE:             dir = "-w"; break;
2670         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2671         default:                     dir = "*ERR*"; break;
2672         }
2673         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2674                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2675 }
2676 EXPORT_SYMBOL(v4l_printk_ioctl);
2677
2678 static long __video_do_ioctl(struct file *file,
2679                 unsigned int cmd, void *arg)
2680 {
2681         struct video_device *vfd = video_devdata(file);
2682         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2683         bool write_only = false;
2684         struct v4l2_ioctl_info default_info;
2685         const struct v4l2_ioctl_info *info;
2686         void *fh = file->private_data;
2687         struct v4l2_fh *vfh = NULL;
2688         int dev_debug = vfd->dev_debug;
2689         long ret = -ENOTTY;
2690
2691         if (ops == NULL) {
2692                 pr_warn("%s: has no ioctl_ops.\n",
2693                                 video_device_node_name(vfd));
2694                 return ret;
2695         }
2696
2697         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2698                 vfh = file->private_data;
2699
2700         if (v4l2_is_known_ioctl(cmd)) {
2701                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2702
2703                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2704                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2705                         goto done;
2706
2707                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2708                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2709                         if (ret)
2710                                 goto done;
2711                 }
2712         } else {
2713                 default_info.ioctl = cmd;
2714                 default_info.flags = 0;
2715                 default_info.debug = v4l_print_default;
2716                 info = &default_info;
2717         }
2718
2719         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2720         if (info->flags & INFO_FL_STD) {
2721                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2722                 const void *p = vfd->ioctl_ops;
2723                 const vidioc_op *vidioc = p + info->u.offset;
2724
2725                 ret = (*vidioc)(file, fh, arg);
2726         } else if (info->flags & INFO_FL_FUNC) {
2727                 ret = info->u.func(ops, file, fh, arg);
2728         } else if (!ops->vidioc_default) {
2729                 ret = -ENOTTY;
2730         } else {
2731                 ret = ops->vidioc_default(file, fh,
2732                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2733                         cmd, arg);
2734         }
2735
2736 done:
2737         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2738                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2739                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2740                         return ret;
2741
2742                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2743                 if (ret < 0)
2744                         pr_cont(": error %ld", ret);
2745                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2746                         pr_cont("\n");
2747                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2748                         info->debug(arg, write_only);
2749                 else {
2750                         pr_cont(": ");
2751                         info->debug(arg, write_only);
2752                 }
2753         }
2754
2755         return ret;
2756 }
2757
2758 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2759                             void __user **user_ptr, void ***kernel_ptr)
2760 {
2761         int ret = 0;
2762
2763         switch (cmd) {
2764         case VIDIOC_PREPARE_BUF:
2765         case VIDIOC_QUERYBUF:
2766         case VIDIOC_QBUF:
2767         case VIDIOC_DQBUF: {
2768                 struct v4l2_buffer *buf = parg;
2769
2770                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2771                         if (buf->length > VIDEO_MAX_PLANES) {
2772                                 ret = -EINVAL;
2773                                 break;
2774                         }
2775                         *user_ptr = (void __user *)buf->m.planes;
2776                         *kernel_ptr = (void **)&buf->m.planes;
2777                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2778                         ret = 1;
2779                 }
2780                 break;
2781         }
2782
2783         case VIDIOC_G_EDID:
2784         case VIDIOC_S_EDID: {
2785                 struct v4l2_edid *edid = parg;
2786
2787                 if (edid->blocks) {
2788                         if (edid->blocks > 256) {
2789                                 ret = -EINVAL;
2790                                 break;
2791                         }
2792                         *user_ptr = (void __user *)edid->edid;
2793                         *kernel_ptr = (void **)&edid->edid;
2794                         *array_size = edid->blocks * 128;
2795                         ret = 1;
2796                 }
2797                 break;
2798         }
2799
2800         case VIDIOC_S_EXT_CTRLS:
2801         case VIDIOC_G_EXT_CTRLS:
2802         case VIDIOC_TRY_EXT_CTRLS: {
2803                 struct v4l2_ext_controls *ctrls = parg;
2804
2805                 if (ctrls->count != 0) {
2806                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2807                                 ret = -EINVAL;
2808                                 break;
2809                         }
2810                         *user_ptr = (void __user *)ctrls->controls;
2811                         *kernel_ptr = (void **)&ctrls->controls;
2812                         *array_size = sizeof(struct v4l2_ext_control)
2813                                     * ctrls->count;
2814                         ret = 1;
2815                 }
2816                 break;
2817         }
2818         }
2819
2820         return ret;
2821 }
2822
2823 long
2824 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2825                v4l2_kioctl func)
2826 {
2827         char    sbuf[128];
2828         void    *mbuf = NULL;
2829         void    *parg = (void *)arg;
2830         long    err  = -EINVAL;
2831         bool    has_array_args;
2832         bool    always_copy = false;
2833         size_t  array_size = 0;
2834         void __user *user_ptr = NULL;
2835         void    **kernel_ptr = NULL;
2836         const size_t ioc_size = _IOC_SIZE(cmd);
2837
2838         /*  Copy arguments into temp kernel buffer  */
2839         if (_IOC_DIR(cmd) != _IOC_NONE) {
2840                 if (ioc_size <= sizeof(sbuf)) {
2841                         parg = sbuf;
2842                 } else {
2843                         /* too big to allocate from stack */
2844                         mbuf = kvmalloc(ioc_size, GFP_KERNEL);
2845                         if (NULL == mbuf)
2846                                 return -ENOMEM;
2847                         parg = mbuf;
2848                 }
2849
2850                 err = -EFAULT;
2851                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2852                         unsigned int n = ioc_size;
2853
2854                         /*
2855                          * In some cases, only a few fields are used as input,
2856                          * i.e. when the app sets "index" and then the driver
2857                          * fills in the rest of the structure for the thing
2858                          * with that index.  We only need to copy up the first
2859                          * non-input field.
2860                          */
2861                         if (v4l2_is_known_ioctl(cmd)) {
2862                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2863
2864                                 if (flags & INFO_FL_CLEAR_MASK)
2865                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2866                                 always_copy = flags & INFO_FL_ALWAYS_COPY;
2867                         }
2868
2869                         if (copy_from_user(parg, (void __user *)arg, n))
2870                                 goto out;
2871
2872                         /* zero out anything we don't copy from userspace */
2873                         if (n < ioc_size)
2874                                 memset((u8 *)parg + n, 0, ioc_size - n);
2875                 } else {
2876                         /* read-only ioctl */
2877                         memset(parg, 0, ioc_size);
2878                 }
2879         }
2880
2881         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2882         if (err < 0)
2883                 goto out;
2884         has_array_args = err;
2885
2886         if (has_array_args) {
2887                 /*
2888                  * When adding new types of array args, make sure that the
2889                  * parent argument to ioctl (which contains the pointer to the
2890                  * array) fits into sbuf (so that mbuf will still remain
2891                  * unused up to here).
2892                  */
2893                 mbuf = kvmalloc(array_size, GFP_KERNEL);
2894                 err = -ENOMEM;
2895                 if (NULL == mbuf)
2896                         goto out_array_args;
2897                 err = -EFAULT;
2898                 if (copy_from_user(mbuf, user_ptr, array_size))
2899                         goto out_array_args;
2900                 *kernel_ptr = mbuf;
2901         }
2902
2903         /* Handles IOCTL */
2904         err = func(file, cmd, parg);
2905         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
2906                 err = -ENOTTY;
2907                 goto out;
2908         }
2909
2910         if (err == 0) {
2911                 if (cmd == VIDIOC_DQBUF)
2912                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2913                 else if (cmd == VIDIOC_QBUF)
2914                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2915         }
2916
2917         if (has_array_args) {
2918                 *kernel_ptr = (void __force *)user_ptr;
2919                 if (copy_to_user(user_ptr, mbuf, array_size))
2920                         err = -EFAULT;
2921                 goto out_array_args;
2922         }
2923         /*
2924          * Some ioctls can return an error, but still have valid
2925          * results that must be returned.
2926          */
2927         if (err < 0 && !always_copy)
2928                 goto out;
2929
2930 out_array_args:
2931         /*  Copy results into user buffer  */
2932         switch (_IOC_DIR(cmd)) {
2933         case _IOC_READ:
2934         case (_IOC_WRITE | _IOC_READ):
2935                 if (copy_to_user((void __user *)arg, parg, ioc_size))
2936                         err = -EFAULT;
2937                 break;
2938         }
2939
2940 out:
2941         kvfree(mbuf);
2942         return err;
2943 }
2944 EXPORT_SYMBOL(video_usercopy);
2945
2946 long video_ioctl2(struct file *file,
2947                unsigned int cmd, unsigned long arg)
2948 {
2949         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2950 }
2951 EXPORT_SYMBOL(video_ioctl2);