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         u32 planes;
 253         unsigned i;
 254
 255         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 256         switch (p->type) {
 257         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 258         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 259                 pix = &p->fmt.pix;
 260                 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",
 261                         pix->width, pix->height,
 262                         (pix->pixelformat & 0xff),
 263                         (pix->pixelformat >>  8) & 0xff,
 264                         (pix->pixelformat >> 16) & 0xff,
 265                         (pix->pixelformat >> 24) & 0xff,
 266                         prt_names(pix->field, v4l2_field_names),
 267                         pix->bytesperline, pix->sizeimage,
 268                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 269                         pix->quantization, pix->xfer_func);
 270                 break;
 271         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 272         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 273                 mp = &p->fmt.pix_mp;
 274                 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",
 275                         mp->width, mp->height,
 276                         (mp->pixelformat & 0xff),
 277                         (mp->pixelformat >>  8) & 0xff,
 278                         (mp->pixelformat >> 16) & 0xff,
 279                         (mp->pixelformat >> 24) & 0xff,
 280                         prt_names(mp->field, v4l2_field_names),
 281                         mp->colorspace, mp->num_planes, mp->flags,
 282                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 283                 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 284                 for (i = 0; i < planes; i++)
 285                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 286                                         mp->plane_fmt[i].bytesperline,
 287                                         mp->plane_fmt[i].sizeimage);
 288                 break;
 289         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 290         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 291                 win = &p->fmt.win;
 292                 /* Note: we can't print the clip list here since the clips
 293                  * pointer is a userspace pointer, not a kernelspace
 294                  * pointer. */
 295                 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",
 296                         win->w.width, win->w.height, win->w.left, win->w.top,
 297                         prt_names(win->field, v4l2_field_names),
 298                         win->chromakey, win->clipcount, win->clips,
 299                         win->bitmap, win->global_alpha);
 300                 break;
 301         case V4L2_BUF_TYPE_VBI_CAPTURE:
 302         case V4L2_BUF_TYPE_VBI_OUTPUT:
 303                 vbi = &p->fmt.vbi;
 304                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 305                         vbi->sampling_rate, vbi->offset,
 306                         vbi->samples_per_line,
 307                         (vbi->sample_format & 0xff),
 308                         (vbi->sample_format >>  8) & 0xff,
 309                         (vbi->sample_format >> 16) & 0xff,
 310                         (vbi->sample_format >> 24) & 0xff,
 311                         vbi->start[0], vbi->start[1],
 312                         vbi->count[0], vbi->count[1]);
 313                 break;
 314         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 315         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 316                 sliced = &p->fmt.sliced;
 317                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 318                                 sliced->service_set, sliced->io_size);
 319                 for (i = 0; i < 24; i++)
 320                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 321                                 sliced->service_lines[0][i],
 322                                 sliced->service_lines[1][i]);
 323                 break;
 324         case V4L2_BUF_TYPE_SDR_CAPTURE:
 325         case V4L2_BUF_TYPE_SDR_OUTPUT:
 326                 sdr = &p->fmt.sdr;
 327                 pr_cont(", pixelformat=%c%c%c%c\n",
 328                         (sdr->pixelformat >>  0) & 0xff,
 329                         (sdr->pixelformat >>  8) & 0xff,
 330                         (sdr->pixelformat >> 16) & 0xff,
 331                         (sdr->pixelformat >> 24) & 0xff);
 332                 break;
 333         case V4L2_BUF_TYPE_META_CAPTURE:
 334                 meta = &p->fmt.meta;
 335                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 336                         (meta->dataformat >>  0) & 0xff,
 337                         (meta->dataformat >>  8) & 0xff,
 338                         (meta->dataformat >> 16) & 0xff,
 339                         (meta->dataformat >> 24) & 0xff,
 340                         meta->buffersize);
 341                 break;
 342         }
 343 }
 344
 345 static void v4l_print_framebuffer(const void *arg, bool write_only)
 346 {
 347         const struct v4l2_framebuffer *p = arg;
 348
 349         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",
 350                         p->capability, p->flags, p->base,
 351                         p->fmt.width, p->fmt.height,
 352                         (p->fmt.pixelformat & 0xff),
 353                         (p->fmt.pixelformat >>  8) & 0xff,
 354                         (p->fmt.pixelformat >> 16) & 0xff,
 355                         (p->fmt.pixelformat >> 24) & 0xff,
 356                         p->fmt.bytesperline, p->fmt.sizeimage,
 357                         p->fmt.colorspace);
 358 }
 359
 360 static void v4l_print_buftype(const void *arg, bool write_only)
 361 {
 362         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 363 }
 364
 365 static void v4l_print_modulator(const void *arg, bool write_only)
 366 {
 367         const struct v4l2_modulator *p = arg;
 368
 369         if (write_only)
 370                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 371         else
 372                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 373                         p->index, (int)sizeof(p->name), p->name, p->capability,
 374                         p->rangelow, p->rangehigh, p->txsubchans);
 375 }
 376
 377 static void v4l_print_tuner(const void *arg, bool write_only)
 378 {
 379         const struct v4l2_tuner *p = arg;
 380
 381         if (write_only)
 382                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 383         else
 384                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
 385                         p->index, (int)sizeof(p->name), p->name, p->type,
 386                         p->capability, p->rangelow,
 387                         p->rangehigh, p->signal, p->afc,
 388                         p->rxsubchans, p->audmode);
 389 }
 390
 391 static void v4l_print_frequency(const void *arg, bool write_only)
 392 {
 393         const struct v4l2_frequency *p = arg;
 394
 395         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 396                                 p->tuner, p->type, p->frequency);
 397 }
 398
 399 static void v4l_print_standard(const void *arg, bool write_only)
 400 {
 401         const struct v4l2_standard *p = arg;
 402
 403         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 404                 p->index,
 405                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 406                 p->frameperiod.numerator,
 407                 p->frameperiod.denominator,
 408                 p->framelines);
 409 }
 410
 411 static void v4l_print_std(const void *arg, bool write_only)
 412 {
 413         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 414 }
 415
 416 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 417 {
 418         const struct v4l2_hw_freq_seek *p = arg;
 419
 420         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 421                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 422                 p->rangelow, p->rangehigh);
 423 }
 424
 425 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 426 {
 427         const struct v4l2_requestbuffers *p = arg;
 428
 429         pr_cont("count=%d, type=%s, memory=%s\n",
 430                 p->count,
 431                 prt_names(p->type, v4l2_type_names),
 432                 prt_names(p->memory, v4l2_memory_names));
 433 }
 434
 435 static void v4l_print_buffer(const void *arg, bool write_only)
 436 {
 437         const struct v4l2_buffer *p = arg;
 438         const struct v4l2_timecode *tc = &p->timecode;
 439         const struct v4l2_plane *plane;
 440         int i;
 441
 442         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 443                         p->timestamp.tv_sec / 3600,
 444                         (int)(p->timestamp.tv_sec / 60) % 60,
 445                         (int)(p->timestamp.tv_sec % 60),
 446                         (long)p->timestamp.tv_usec,
 447                         p->index,
 448                         prt_names(p->type, v4l2_type_names),
 449                         p->flags, prt_names(p->field, v4l2_field_names),
 450                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 451
 452         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 453                 pr_cont("\n");
 454                 for (i = 0; i < p->length; ++i) {
 455                         plane = &p->m.planes[i];
 456                         printk(KERN_DEBUG
 457                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 458                                 i, plane->bytesused, plane->data_offset,
 459                                 plane->m.userptr, plane->length);
 460                 }
 461         } else {
 462                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 463                         p->bytesused, p->m.userptr, p->length);
 464         }
 465
 466         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 467                         tc->hours, tc->minutes, tc->seconds,
 468                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 469 }
 470
 471 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 472 {
 473         const struct v4l2_exportbuffer *p = arg;
 474
 475         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 476                 p->fd, prt_names(p->type, v4l2_type_names),
 477                 p->index, p->plane, p->flags);
 478 }
 479
 480 static void v4l_print_create_buffers(const void *arg, bool write_only)
 481 {
 482         const struct v4l2_create_buffers *p = arg;
 483
 484         pr_cont("index=%d, count=%d, memory=%s, ",
 485                         p->index, p->count,
 486                         prt_names(p->memory, v4l2_memory_names));
 487         v4l_print_format(&p->format, write_only);
 488 }
 489
 490 static void v4l_print_streamparm(const void *arg, bool write_only)
 491 {
 492         const struct v4l2_streamparm *p = arg;
 493
 494         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 495
 496         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 497             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 498                 const struct v4l2_captureparm *c = &p->parm.capture;
 499
 500                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 501                         c->capability, c->capturemode,
 502                         c->timeperframe.numerator, c->timeperframe.denominator,
 503                         c->extendedmode, c->readbuffers);
 504         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 505                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 506                 const struct v4l2_outputparm *c = &p->parm.output;
 507
 508                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 509                         c->capability, c->outputmode,
 510                         c->timeperframe.numerator, c->timeperframe.denominator,
 511                         c->extendedmode, c->writebuffers);
 512         } else {
 513                 pr_cont("\n");
 514         }
 515 }
 516
 517 static void v4l_print_queryctrl(const void *arg, bool write_only)
 518 {
 519         const struct v4l2_queryctrl *p = arg;
 520
 521         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 522                         p->id, p->type, (int)sizeof(p->name), p->name,
 523                         p->minimum, p->maximum,
 524                         p->step, p->default_value, p->flags);
 525 }
 526
 527 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 528 {
 529         const struct v4l2_query_ext_ctrl *p = arg;
 530
 531         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",
 532                         p->id, p->type, (int)sizeof(p->name), p->name,
 533                         p->minimum, p->maximum,
 534                         p->step, p->default_value, p->flags,
 535                         p->elem_size, p->elems, p->nr_of_dims,
 536                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 537 }
 538
 539 static void v4l_print_querymenu(const void *arg, bool write_only)
 540 {
 541         const struct v4l2_querymenu *p = arg;
 542
 543         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 544 }
 545
 546 static void v4l_print_control(const void *arg, bool write_only)
 547 {
 548         const struct v4l2_control *p = arg;
 549
 550         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 551 }
 552
 553 static void v4l_print_ext_controls(const void *arg, bool write_only)
 554 {
 555         const struct v4l2_ext_controls *p = arg;
 556         int i;
 557
 558         pr_cont("which=0x%x, count=%d, error_idx=%d",
 559                         p->which, p->count, p->error_idx);
 560         for (i = 0; i < p->count; i++) {
 561                 if (!p->controls[i].size)
 562                         pr_cont(", id/val=0x%x/0x%x",
 563                                 p->controls[i].id, p->controls[i].value);
 564                 else
 565                         pr_cont(", id/size=0x%x/%u",
 566                                 p->controls[i].id, p->controls[i].size);
 567         }
 568         pr_cont("\n");
 569 }
 570
 571 static void v4l_print_cropcap(const void *arg, bool write_only)
 572 {
 573         const struct v4l2_cropcap *p = arg;
 574
 575         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 576                 prt_names(p->type, v4l2_type_names),
 577                 p->bounds.width, p->bounds.height,
 578                 p->bounds.left, p->bounds.top,
 579                 p->defrect.width, p->defrect.height,
 580                 p->defrect.left, p->defrect.top,
 581                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 582 }
 583
 584 static void v4l_print_crop(const void *arg, bool write_only)
 585 {
 586         const struct v4l2_crop *p = arg;
 587
 588         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 589                 prt_names(p->type, v4l2_type_names),
 590                 p->c.width, p->c.height,
 591                 p->c.left, p->c.top);
 592 }
 593
 594 static void v4l_print_selection(const void *arg, bool write_only)
 595 {
 596         const struct v4l2_selection *p = arg;
 597
 598         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 599                 prt_names(p->type, v4l2_type_names),
 600                 p->target, p->flags,
 601                 p->r.width, p->r.height, p->r.left, p->r.top);
 602 }
 603
 604 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 605 {
 606         const struct v4l2_jpegcompression *p = arg;
 607
 608         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 609                 p->quality, p->APPn, p->APP_len,
 610                 p->COM_len, p->jpeg_markers);
 611 }
 612
 613 static void v4l_print_enc_idx(const void *arg, bool write_only)
 614 {
 615         const struct v4l2_enc_idx *p = arg;
 616
 617         pr_cont("entries=%d, entries_cap=%d\n",
 618                         p->entries, p->entries_cap);
 619 }
 620
 621 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 622 {
 623         const struct v4l2_encoder_cmd *p = arg;
 624
 625         pr_cont("cmd=%d, flags=0x%x\n",
 626                         p->cmd, p->flags);
 627 }
 628
 629 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 630 {
 631         const struct v4l2_decoder_cmd *p = arg;
 632
 633         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 634
 635         if (p->cmd == V4L2_DEC_CMD_START)
 636                 pr_info("speed=%d, format=%u\n",
 637                                 p->start.speed, p->start.format);
 638         else if (p->cmd == V4L2_DEC_CMD_STOP)
 639                 pr_info("pts=%llu\n", p->stop.pts);
 640 }
 641
 642 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 643 {
 644         const struct v4l2_dbg_chip_info *p = arg;
 645
 646         pr_cont("type=%u, ", p->match.type);
 647         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 648                 pr_cont("name=%.*s, ",
 649                                 (int)sizeof(p->match.name), p->match.name);
 650         else
 651                 pr_cont("addr=%u, ", p->match.addr);
 652         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 653 }
 654
 655 static void v4l_print_dbg_register(const void *arg, bool write_only)
 656 {
 657         const struct v4l2_dbg_register *p = arg;
 658
 659         pr_cont("type=%u, ", p->match.type);
 660         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 661                 pr_cont("name=%.*s, ",
 662                                 (int)sizeof(p->match.name), p->match.name);
 663         else
 664                 pr_cont("addr=%u, ", p->match.addr);
 665         pr_cont("reg=0x%llx, val=0x%llx\n",
 666                         p->reg, p->val);
 667 }
 668
 669 static void v4l_print_dv_timings(const void *arg, bool write_only)
 670 {
 671         const struct v4l2_dv_timings *p = arg;
 672
 673         switch (p->type) {
 674         case V4L2_DV_BT_656_1120:
 675                 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",
 676                                 p->bt.interlaced, p->bt.pixelclock,
 677                                 p->bt.width, p->bt.height,
 678                                 p->bt.polarities, p->bt.hfrontporch,
 679                                 p->bt.hsync, p->bt.hbackporch,
 680                                 p->bt.vfrontporch, p->bt.vsync,
 681                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 682                                 p->bt.il_vsync, p->bt.il_vbackporch,
 683                                 p->bt.standards, p->bt.flags);
 684                 break;
 685         default:
 686                 pr_cont("type=%d\n", p->type);
 687                 break;
 688         }
 689 }
 690
 691 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 692 {
 693         const struct v4l2_enum_dv_timings *p = arg;
 694
 695         pr_cont("index=%u, ", p->index);
 696         v4l_print_dv_timings(&p->timings, write_only);
 697 }
 698
 699 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 700 {
 701         const struct v4l2_dv_timings_cap *p = arg;
 702
 703         switch (p->type) {
 704         case V4L2_DV_BT_656_1120:
 705                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 706                         p->bt.min_width, p->bt.max_width,
 707                         p->bt.min_height, p->bt.max_height,
 708                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 709                         p->bt.standards, p->bt.capabilities);
 710                 break;
 711         default:
 712                 pr_cont("type=%u\n", p->type);
 713                 break;
 714         }
 715 }
 716
 717 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 718 {
 719         const struct v4l2_frmsizeenum *p = arg;
 720
 721         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 722                         p->index,
 723                         (p->pixel_format & 0xff),
 724                         (p->pixel_format >>  8) & 0xff,
 725                         (p->pixel_format >> 16) & 0xff,
 726                         (p->pixel_format >> 24) & 0xff,
 727                         p->type);
 728         switch (p->type) {
 729         case V4L2_FRMSIZE_TYPE_DISCRETE:
 730                 pr_cont(", wxh=%ux%u\n",
 731                         p->discrete.width, p->discrete.height);
 732                 break;
 733         case V4L2_FRMSIZE_TYPE_STEPWISE:
 734                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 735                                 p->stepwise.min_width,  p->stepwise.min_height,
 736                                 p->stepwise.step_width, p->stepwise.step_height,
 737                                 p->stepwise.max_width,  p->stepwise.max_height);
 738                 break;
 739         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 740                 /* fall through */
 741         default:
 742                 pr_cont("\n");
 743                 break;
 744         }
 745 }
 746
 747 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 748 {
 749         const struct v4l2_frmivalenum *p = arg;
 750
 751         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 752                         p->index,
 753                         (p->pixel_format & 0xff),
 754                         (p->pixel_format >>  8) & 0xff,
 755                         (p->pixel_format >> 16) & 0xff,
 756                         (p->pixel_format >> 24) & 0xff,
 757                         p->width, p->height, p->type);
 758         switch (p->type) {
 759         case V4L2_FRMIVAL_TYPE_DISCRETE:
 760                 pr_cont(", fps=%d/%d\n",
 761                                 p->discrete.numerator,
 762                                 p->discrete.denominator);
 763                 break;
 764         case V4L2_FRMIVAL_TYPE_STEPWISE:
 765                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 766                                 p->stepwise.min.numerator,
 767                                 p->stepwise.min.denominator,
 768                                 p->stepwise.max.numerator,
 769                                 p->stepwise.max.denominator,
 770                                 p->stepwise.step.numerator,
 771                                 p->stepwise.step.denominator);
 772                 break;
 773         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 774                 /* fall through */
 775         default:
 776                 pr_cont("\n");
 777                 break;
 778         }
 779 }
 780
 781 static void v4l_print_event(const void *arg, bool write_only)
 782 {
 783         const struct v4l2_event *p = arg;
 784         const struct v4l2_event_ctrl *c;
 785
 786         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 787                         p->type, p->pending, p->sequence, p->id,
 788                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 789         switch (p->type) {
 790         case V4L2_EVENT_VSYNC:
 791                 printk(KERN_DEBUG "field=%s\n",
 792                         prt_names(p->u.vsync.field, v4l2_field_names));
 793                 break;
 794         case V4L2_EVENT_CTRL:
 795                 c = &p->u.ctrl;
 796                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 797                         c->changes, c->type);
 798                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 799                         pr_cont("value64=%lld, ", c->value64);
 800                 else
 801                         pr_cont("value=%d, ", c->value);
 802                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 803                         c->flags, c->minimum, c->maximum,
 804                         c->step, c->default_value);
 805                 break;
 806         case V4L2_EVENT_FRAME_SYNC:
 807                 pr_cont("frame_sequence=%u\n",
 808                         p->u.frame_sync.frame_sequence);
 809                 break;
 810         }
 811 }
 812
 813 static void v4l_print_event_subscription(const void *arg, bool write_only)
 814 {
 815         const struct v4l2_event_subscription *p = arg;
 816
 817         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 818                         p->type, p->id, p->flags);
 819 }
 820
 821 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 822 {
 823         const struct v4l2_sliced_vbi_cap *p = arg;
 824         int i;
 825
 826         pr_cont("type=%s, service_set=0x%08x\n",
 827                         prt_names(p->type, v4l2_type_names), p->service_set);
 828         for (i = 0; i < 24; i++)
 829                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 830                                 p->service_lines[0][i],
 831                                 p->service_lines[1][i]);
 832 }
 833
 834 static void v4l_print_freq_band(const void *arg, bool write_only)
 835 {
 836         const struct v4l2_frequency_band *p = arg;
 837
 838         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 839                         p->tuner, p->type, p->index,
 840                         p->capability, p->rangelow,
 841                         p->rangehigh, p->modulation);
 842 }
 843
 844 static void v4l_print_edid(const void *arg, bool write_only)
 845 {
 846         const struct v4l2_edid *p = arg;
 847
 848         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 849                 p->pad, p->start_block, p->blocks);
 850 }
 851
 852 static void v4l_print_u32(const void *arg, bool write_only)
 853 {
 854         pr_cont("value=%u\n", *(const u32 *)arg);
 855 }
 856
 857 static void v4l_print_newline(const void *arg, bool write_only)
 858 {
 859         pr_cont("\n");
 860 }
 861
 862 static void v4l_print_default(const void *arg, bool write_only)
 863 {
 864         pr_cont("driver-specific ioctl\n");
 865 }
 866
 867 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 868 {
 869         __u32 i;
 870
 871         /* zero the reserved fields */
 872         c->reserved[0] = c->reserved[1] = 0;
 873         for (i = 0; i < c->count; i++)
 874                 c->controls[i].reserved2[0] = 0;
 875
 876         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 877            when using extended controls.
 878            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 879            is it allowed for backwards compatibility.
 880          */
 881         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 882                 return 0;
 883         if (!c->which)
 884                 return 1;
 885         /* Check that all controls are from the same control class. */
 886         for (i = 0; i < c->count; i++) {
 887                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 888                         c->error_idx = i;
 889                         return 0;
 890                 }
 891         }
 892         return 1;
 893 }
 894
 895 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 896 {
 897         struct video_device *vfd = video_devdata(file);
 898         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 899         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 900         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 901         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 902         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 903         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 904         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 905
 906         if (ops == NULL)
 907                 return -EINVAL;
 908
 909         switch (type) {
 910         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 911                 if ((is_vid || is_tch) && is_rx &&
 912                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 913                         return 0;
 914                 break;
 915         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 916                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 917                         return 0;
 918                 break;
 919         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 920                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 921                         return 0;
 922                 break;
 923         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 924                 if (is_vid && is_tx &&
 925                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 926                         return 0;
 927                 break;
 928         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 929                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 930                         return 0;
 931                 break;
 932         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 933                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 934                         return 0;
 935                 break;
 936         case V4L2_BUF_TYPE_VBI_CAPTURE:
 937                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 938                         return 0;
 939                 break;
 940         case V4L2_BUF_TYPE_VBI_OUTPUT:
 941                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 942                         return 0;
 943                 break;
 944         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 945                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 946                         return 0;
 947                 break;
 948         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 949                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 950                         return 0;
 951                 break;
 952         case V4L2_BUF_TYPE_SDR_CAPTURE:
 953                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 954                         return 0;
 955                 break;
 956         case V4L2_BUF_TYPE_SDR_OUTPUT:
 957                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 958                         return 0;
 959                 break;
 960         case V4L2_BUF_TYPE_META_CAPTURE:
 961                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
 962                         return 0;
 963                 break;
 964         default:
 965                 break;
 966         }
 967         return -EINVAL;
 968 }
 969
 970 static void v4l_sanitize_format(struct v4l2_format *fmt)
 971 {
 972         unsigned int offset;
 973
 974         /*
 975          * The v4l2_pix_format structure has been extended with fields that were
 976          * not previously required to be set to zero by applications. The priv
 977          * field, when set to a magic value, indicates the the extended fields
 978          * are valid. Otherwise they will contain undefined values. To simplify
 979          * the API towards drivers zero the extended fields and set the priv
 980          * field to the magic value when the extended pixel format structure
 981          * isn't used by applications.
 982          */
 983
 984         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 985             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 986                 return;
 987
 988         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
 989                 return;
 990
 991         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
 992
 993         offset = offsetof(struct v4l2_pix_format, priv)
 994                + sizeof(fmt->fmt.pix.priv);
 995         memset(((void *)&fmt->fmt.pix) + offset, 0,
 996                sizeof(fmt->fmt.pix) - offset);
 997 }
 998
 999 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1000                                 struct file *file, void *fh, void *arg)
1001 {
1002         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1003         struct video_device *vfd = video_devdata(file);
1004         int ret;
1005
1006         cap->version = LINUX_VERSION_CODE;
1007         cap->device_caps = vfd->device_caps;
1008         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1009
1010         ret = ops->vidioc_querycap(file, fh, cap);
1011
1012         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1013         /*
1014          * Drivers MUST fill in device_caps, so check for this and
1015          * warn if it was forgotten.
1016          */
1017         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1018                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1019                 cap->driver, cap->capabilities, cap->device_caps);
1020         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1021
1022         return ret;
1023 }
1024
1025 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1026                                 struct file *file, void *fh, void *arg)
1027 {
1028         struct video_device *vfd = video_devdata(file);
1029         int ret;
1030
1031         ret = v4l_enable_media_source(vfd);
1032         if (ret)
1033                 return ret;
1034         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1035 }
1036
1037 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1038                                 struct file *file, void *fh, void *arg)
1039 {
1040         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1041 }
1042
1043 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1044                                 struct file *file, void *fh, void *arg)
1045 {
1046         struct video_device *vfd;
1047         u32 *p = arg;
1048
1049         vfd = video_devdata(file);
1050         *p = v4l2_prio_max(vfd->prio);
1051         return 0;
1052 }
1053
1054 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1055                                 struct file *file, void *fh, void *arg)
1056 {
1057         struct video_device *vfd;
1058         struct v4l2_fh *vfh;
1059         u32 *p = arg;
1060
1061         vfd = video_devdata(file);
1062         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1063                 return -ENOTTY;
1064         vfh = file->private_data;
1065         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1066 }
1067
1068 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1069                                 struct file *file, void *fh, void *arg)
1070 {
1071         struct video_device *vfd = video_devdata(file);
1072         struct v4l2_input *p = arg;
1073
1074         /*
1075          * We set the flags for CAP_DV_TIMINGS &
1076          * CAP_STD here based on ioctl handler provided by the
1077          * driver. If the driver doesn't support these
1078          * for a specific input, it must override these flags.
1079          */
1080         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1081                 p->capabilities |= V4L2_IN_CAP_STD;
1082
1083         return ops->vidioc_enum_input(file, fh, p);
1084 }
1085
1086 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1087                                 struct file *file, void *fh, void *arg)
1088 {
1089         struct video_device *vfd = video_devdata(file);
1090         struct v4l2_output *p = arg;
1091
1092         /*
1093          * We set the flags for CAP_DV_TIMINGS &
1094          * CAP_STD here based on ioctl handler provided by the
1095          * driver. If the driver doesn't support these
1096          * for a specific output, it must override these flags.
1097          */
1098         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1099                 p->capabilities |= V4L2_OUT_CAP_STD;
1100
1101         return ops->vidioc_enum_output(file, fh, p);
1102 }
1103
1104 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1105 {
1106         const unsigned sz = sizeof(fmt->description);
1107         const char *descr = NULL;
1108         u32 flags = 0;
1109
1110         /*
1111          * We depart from the normal coding style here since the descriptions
1112          * should be aligned so it is easy to see which descriptions will be
1113          * longer than 31 characters (the max length for a description).
1114          * And frankly, this is easier to read anyway.
1115          *
1116          * Note that gcc will use O(log N) comparisons to find the right case.
1117          */
1118         switch (fmt->pixelformat) {
1119         /* Max description length mask: descr = "0123456789012345678901234567890" */
1120         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1121         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1122         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1123         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1124         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1125         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1126         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1127         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1128         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1129         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1130         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1131         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1132         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1133         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1134         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1135         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1136         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1137         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1138         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1139         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1140         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1141         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1142         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1143         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1144         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1145         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1146         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1147         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1148         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1149         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1150         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1151         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1152         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1153         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1154         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1155         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1156         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1157         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1158         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1159         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1160         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1161         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1162         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1163         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1164         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1165         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1166         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1167         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1168         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1169         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1170         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1171         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1172         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1173         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1174         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1175         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1176         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1177         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1178         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1179         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1180         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1181         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1182         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1183         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1184         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1185         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1186         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1187         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1188         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1189         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1190         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1191         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1192         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1193         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1194         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1195         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1196         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1197         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1198         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1199         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1200         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1201         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1202         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1203         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1204         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1205         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1206         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1207         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1208         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1209         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1210         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1211         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1212         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1213         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1214         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1215         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1216         case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1217         case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1218         case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1219         case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1220         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1221         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1222         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1223         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1224         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1225         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1226         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1227         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1228         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1229         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1230         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1231         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1232         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1233         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1234         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1235         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1236         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1237         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1238         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1239         case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1240         case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1241         case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1242         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1243         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1244         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1245         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1246         case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1247         case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1248
1249         default:
1250                 /* Compressed formats */
1251                 flags = V4L2_FMT_FLAG_COMPRESSED;
1252                 switch (fmt->pixelformat) {
1253                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1254                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1255                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1256                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1257                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1258                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1259                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1260                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1261                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1262                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1263                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1264                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1265                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1266                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1267                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1268                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1269                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1270                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1271                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1272                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1273                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1274                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1275                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1276                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1277                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1278                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1279                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1280                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1281                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1282                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1283                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1284                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1285                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1286                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1287                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1288                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1289                 default:
1290                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1291                         if (fmt->description[0])
1292                                 return;
1293                         flags = 0;
1294                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1295                                         (char)(fmt->pixelformat & 0x7f),
1296                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1297                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1298                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1299                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1300                         break;
1301                 }
1302         }
1303
1304         if (descr)
1305                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1306         fmt->flags = flags;
1307 }
1308
1309 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1310                                 struct file *file, void *fh, void *arg)
1311 {
1312         struct v4l2_fmtdesc *p = arg;
1313         int ret = check_fmt(file, p->type);
1314
1315         if (ret)
1316                 return ret;
1317         ret = -EINVAL;
1318
1319         switch (p->type) {
1320         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1321                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1322                         break;
1323                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1324                 break;
1325         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1326                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1327                         break;
1328                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1329                 break;
1330         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1331                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1332                         break;
1333                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1334                 break;
1335         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1336                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1337                         break;
1338                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1339                 break;
1340         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1341                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1342                         break;
1343                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1344                 break;
1345         case V4L2_BUF_TYPE_SDR_CAPTURE:
1346                 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1347                         break;
1348                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1349                 break;
1350         case V4L2_BUF_TYPE_SDR_OUTPUT:
1351                 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1352                         break;
1353                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1354                 break;
1355         case V4L2_BUF_TYPE_META_CAPTURE:
1356                 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1357                         break;
1358                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1359                 break;
1360         }
1361         if (ret == 0)
1362                 v4l_fill_fmtdesc(p);
1363         return ret;
1364 }
1365
1366 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1367 {
1368         /*
1369          * The v4l2_pix_format structure contains fields that make no sense for
1370          * touch. Set them to default values in this case.
1371          */
1372
1373         p->field = V4L2_FIELD_NONE;
1374         p->colorspace = V4L2_COLORSPACE_RAW;
1375         p->flags = 0;
1376         p->ycbcr_enc = 0;
1377         p->quantization = 0;
1378         p->xfer_func = 0;
1379 }
1380
1381 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1382                                 struct file *file, void *fh, void *arg)
1383 {
1384         struct v4l2_format *p = arg;
1385         struct video_device *vfd = video_devdata(file);
1386         int ret = check_fmt(file, p->type);
1387
1388         if (ret)
1389                 return ret;
1390
1391         /*
1392          * fmt can't be cleared for these overlay types due to the 'clips'
1393          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1394          * Those are provided by the user. So handle these two overlay types
1395          * first, and then just do a simple memset for the other types.
1396          */
1397         switch (p->type) {
1398         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1399         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1400                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1401                 u32 clipcount = p->fmt.win.clipcount;
1402                 void __user *bitmap = p->fmt.win.bitmap;
1403
1404                 memset(&p->fmt, 0, sizeof(p->fmt));
1405                 p->fmt.win.clips = clips;
1406                 p->fmt.win.clipcount = clipcount;
1407                 p->fmt.win.bitmap = bitmap;
1408                 break;
1409         }
1410         default:
1411                 memset(&p->fmt, 0, sizeof(p->fmt));
1412                 break;
1413         }
1414
1415         switch (p->type) {
1416         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1417                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1418                         break;
1419                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1420                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1421                 /* just in case the driver zeroed it again */
1422                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1423                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1424                         v4l_pix_format_touch(&p->fmt.pix);
1425                 return ret;
1426         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1427                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1428         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1429                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1430         case V4L2_BUF_TYPE_VBI_CAPTURE:
1431                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1432         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1433                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1434         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1435                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1436                         break;
1437                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1438                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1439                 /* just in case the driver zeroed it again */
1440                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1441                 return ret;
1442         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1443                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1444         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1445                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1446         case V4L2_BUF_TYPE_VBI_OUTPUT:
1447                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1448         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1449                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1450         case V4L2_BUF_TYPE_SDR_CAPTURE:
1451                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1452         case V4L2_BUF_TYPE_SDR_OUTPUT:
1453                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1454         case V4L2_BUF_TYPE_META_CAPTURE:
1455                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1456         }
1457         return -EINVAL;
1458 }
1459
1460 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1461                                 struct file *file, void *fh, void *arg)
1462 {
1463         struct v4l2_format *p = arg;
1464         struct video_device *vfd = video_devdata(file);
1465         int ret = check_fmt(file, p->type);
1466
1467         if (ret)
1468                 return ret;
1469
1470         ret = v4l_enable_media_source(vfd);
1471         if (ret)
1472                 return ret;
1473         v4l_sanitize_format(p);
1474
1475         switch (p->type) {
1476         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1477                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1478                         break;
1479                 CLEAR_AFTER_FIELD(p, fmt.pix);
1480                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1481                 /* just in case the driver zeroed it again */
1482                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1483                 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1484                         v4l_pix_format_touch(&p->fmt.pix);
1485                 return ret;
1486         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1487                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1488                         break;
1489                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1490                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1491         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1492                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1493                         break;
1494                 CLEAR_AFTER_FIELD(p, fmt.win);
1495                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1496         case V4L2_BUF_TYPE_VBI_CAPTURE:
1497                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1498                         break;
1499                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1500                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1501         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1502                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1503                         break;
1504                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1505                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1506         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1507                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1508                         break;
1509                 CLEAR_AFTER_FIELD(p, fmt.pix);
1510                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1511                 /* just in case the driver zeroed it again */
1512                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1513                 return ret;
1514         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1515                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1516                         break;
1517                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1518                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1519         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1520                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1521                         break;
1522                 CLEAR_AFTER_FIELD(p, fmt.win);
1523                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1524         case V4L2_BUF_TYPE_VBI_OUTPUT:
1525                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1526                         break;
1527                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1528                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1529         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1530                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1531                         break;
1532                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1533                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1534         case V4L2_BUF_TYPE_SDR_CAPTURE:
1535                 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1536                         break;
1537                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1538                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1539         case V4L2_BUF_TYPE_SDR_OUTPUT:
1540                 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1541                         break;
1542                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1543                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1544         case V4L2_BUF_TYPE_META_CAPTURE:
1545                 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1546                         break;
1547                 CLEAR_AFTER_FIELD(p, fmt.meta);
1548                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1549         }
1550         return -EINVAL;
1551 }
1552
1553 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1554                                 struct file *file, void *fh, void *arg)
1555 {
1556         struct v4l2_format *p = arg;
1557         int ret = check_fmt(file, p->type);
1558
1559         if (ret)
1560                 return ret;
1561
1562         v4l_sanitize_format(p);
1563
1564         switch (p->type) {
1565         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1566                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1567                         break;
1568                 CLEAR_AFTER_FIELD(p, fmt.pix);
1569                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1570                 /* just in case the driver zeroed it again */
1571                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1572                 return ret;
1573         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1574                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1575                         break;
1576                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1577                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1578         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1579                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1580                         break;
1581                 CLEAR_AFTER_FIELD(p, fmt.win);
1582                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1583         case V4L2_BUF_TYPE_VBI_CAPTURE:
1584                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1585                         break;
1586                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1587                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1588         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1589                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1590                         break;
1591                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1592                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1593         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1594                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1595                         break;
1596                 CLEAR_AFTER_FIELD(p, fmt.pix);
1597                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1598                 /* just in case the driver zeroed it again */
1599                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1600                 return ret;
1601         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1602                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1603                         break;
1604                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1605                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1606         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1607                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1608                         break;
1609                 CLEAR_AFTER_FIELD(p, fmt.win);
1610                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1611         case V4L2_BUF_TYPE_VBI_OUTPUT:
1612                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1613                         break;
1614                 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1615                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1616         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1617                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1618                         break;
1619                 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1620                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1621         case V4L2_BUF_TYPE_SDR_CAPTURE:
1622                 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1623                         break;
1624                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1625                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1626         case V4L2_BUF_TYPE_SDR_OUTPUT:
1627                 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1628                         break;
1629                 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1630                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1631         case V4L2_BUF_TYPE_META_CAPTURE:
1632                 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1633                         break;
1634                 CLEAR_AFTER_FIELD(p, fmt.meta);
1635                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1636         }
1637         return -EINVAL;
1638 }
1639
1640 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1641                                 struct file *file, void *fh, void *arg)
1642 {
1643         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1644 }
1645
1646 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1647                                 struct file *file, void *fh, void *arg)
1648 {
1649         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1650 }
1651
1652 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1653                                 struct file *file, void *fh, void *arg)
1654 {
1655         struct video_device *vfd = video_devdata(file);
1656         struct v4l2_tuner *p = arg;
1657         int err;
1658
1659         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1660                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1661         err = ops->vidioc_g_tuner(file, fh, p);
1662         if (!err)
1663                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1664         return err;
1665 }
1666
1667 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1668                                 struct file *file, void *fh, void *arg)
1669 {
1670         struct video_device *vfd = video_devdata(file);
1671         struct v4l2_tuner *p = arg;
1672         int ret;
1673
1674         ret = v4l_enable_media_source(vfd);
1675         if (ret)
1676                 return ret;
1677         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1678                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1679         return ops->vidioc_s_tuner(file, fh, p);
1680 }
1681
1682 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1683                                 struct file *file, void *fh, void *arg)
1684 {
1685         struct video_device *vfd = video_devdata(file);
1686         struct v4l2_modulator *p = arg;
1687         int err;
1688
1689         if (vfd->vfl_type == VFL_TYPE_RADIO)
1690                 p->type = V4L2_TUNER_RADIO;
1691
1692         err = ops->vidioc_g_modulator(file, fh, p);
1693         if (!err)
1694                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1695         return err;
1696 }
1697
1698 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1699                                 struct file *file, void *fh, void *arg)
1700 {
1701         struct video_device *vfd = video_devdata(file);
1702         struct v4l2_modulator *p = arg;
1703
1704         if (vfd->vfl_type == VFL_TYPE_RADIO)
1705                 p->type = V4L2_TUNER_RADIO;
1706
1707         return ops->vidioc_s_modulator(file, fh, p);
1708 }
1709
1710 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1711                                 struct file *file, void *fh, void *arg)
1712 {
1713         struct video_device *vfd = video_devdata(file);
1714         struct v4l2_frequency *p = arg;
1715
1716         if (vfd->vfl_type == VFL_TYPE_SDR)
1717                 p->type = V4L2_TUNER_SDR;
1718         else
1719                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1720                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1721         return ops->vidioc_g_frequency(file, fh, p);
1722 }
1723
1724 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1725                                 struct file *file, void *fh, void *arg)
1726 {
1727         struct video_device *vfd = video_devdata(file);
1728         const struct v4l2_frequency *p = arg;
1729         enum v4l2_tuner_type type;
1730         int ret;
1731
1732         ret = v4l_enable_media_source(vfd);
1733         if (ret)
1734                 return ret;
1735         if (vfd->vfl_type == VFL_TYPE_SDR) {
1736                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1737                         return -EINVAL;
1738         } else {
1739                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1740                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1741                 if (type != p->type)
1742                         return -EINVAL;
1743         }
1744         return ops->vidioc_s_frequency(file, fh, p);
1745 }
1746
1747 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1748                                 struct file *file, void *fh, void *arg)
1749 {
1750         struct video_device *vfd = video_devdata(file);
1751         struct v4l2_standard *p = arg;
1752         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1753         unsigned int index = p->index, i, j = 0;
1754         const char *descr = "";
1755
1756         /* Return -ENODATA if the tvnorms for the current input
1757            or output is 0, meaning that it doesn't support this API. */
1758         if (id == 0)
1759                 return -ENODATA;
1760
1761         /* Return norm array in a canonical way */
1762         for (i = 0; i <= index && id; i++) {
1763                 /* last std value in the standards array is 0, so this
1764                    while always ends there since (id & 0) == 0. */
1765                 while ((id & standards[j].std) != standards[j].std)
1766                         j++;
1767                 curr_id = standards[j].std;
1768                 descr = standards[j].descr;
1769                 j++;
1770                 if (curr_id == 0)
1771                         break;
1772                 if (curr_id != V4L2_STD_PAL &&
1773                                 curr_id != V4L2_STD_SECAM &&
1774                                 curr_id != V4L2_STD_NTSC)
1775                         id &= ~curr_id;
1776         }
1777         if (i <= index)
1778                 return -EINVAL;
1779
1780         v4l2_video_std_construct(p, curr_id, descr);
1781         return 0;
1782 }
1783
1784 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1785                                 struct file *file, void *fh, void *arg)
1786 {
1787         struct video_device *vfd = video_devdata(file);
1788         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1789         int ret;
1790
1791         ret = v4l_enable_media_source(vfd);
1792         if (ret)
1793                 return ret;
1794         norm = id & vfd->tvnorms;
1795         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1796                 return -EINVAL;
1797
1798         /* Calls the specific handler */
1799         return ops->vidioc_s_std(file, fh, norm);
1800 }
1801
1802 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1803                                 struct file *file, void *fh, void *arg)
1804 {
1805         struct video_device *vfd = video_devdata(file);
1806         v4l2_std_id *p = arg;
1807         int ret;
1808
1809         ret = v4l_enable_media_source(vfd);
1810         if (ret)
1811                 return ret;
1812         /*
1813          * If no signal is detected, then the driver should return
1814          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1815          * any standards that do not apply removed.
1816          *
1817          * This means that tuners, audio and video decoders can join
1818          * their efforts to improve the standards detection.
1819          */
1820         *p = vfd->tvnorms;
1821         return ops->vidioc_querystd(file, fh, arg);
1822 }
1823
1824 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1825                                 struct file *file, void *fh, void *arg)
1826 {
1827         struct video_device *vfd = video_devdata(file);
1828         struct v4l2_hw_freq_seek *p = arg;
1829         enum v4l2_tuner_type type;
1830         int ret;
1831
1832         ret = v4l_enable_media_source(vfd);
1833         if (ret)
1834                 return ret;
1835         /* s_hw_freq_seek is not supported for SDR for now */
1836         if (vfd->vfl_type == VFL_TYPE_SDR)
1837                 return -EINVAL;
1838
1839         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1840                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1841         if (p->type != type)
1842                 return -EINVAL;
1843         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1844 }
1845
1846 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1847                                 struct file *file, void *fh, void *arg)
1848 {
1849         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1850 }
1851
1852 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1853                                 struct file *file, void *fh, void *arg)
1854 {
1855         struct v4l2_requestbuffers *p = arg;
1856         int ret = check_fmt(file, p->type);
1857
1858         if (ret)
1859                 return ret;
1860
1861         CLEAR_AFTER_FIELD(p, memory);
1862
1863         return ops->vidioc_reqbufs(file, fh, p);
1864 }
1865
1866 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1867                                 struct file *file, void *fh, void *arg)
1868 {
1869         struct v4l2_buffer *p = arg;
1870         int ret = check_fmt(file, p->type);
1871
1872         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1873 }
1874
1875 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1876                                 struct file *file, void *fh, void *arg)
1877 {
1878         struct v4l2_buffer *p = arg;
1879         int ret = check_fmt(file, p->type);
1880
1881         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1882 }
1883
1884 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1885                                 struct file *file, void *fh, void *arg)
1886 {
1887         struct v4l2_buffer *p = arg;
1888         int ret = check_fmt(file, p->type);
1889
1890         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1891 }
1892
1893 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1894                                 struct file *file, void *fh, void *arg)
1895 {
1896         struct v4l2_create_buffers *create = arg;
1897         int ret = check_fmt(file, create->format.type);
1898
1899         if (ret)
1900                 return ret;
1901
1902         CLEAR_AFTER_FIELD(create, format);
1903
1904         v4l_sanitize_format(&create->format);
1905
1906         ret = ops->vidioc_create_bufs(file, fh, create);
1907
1908         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1909             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1910                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1911
1912         return ret;
1913 }
1914
1915 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1916                                 struct file *file, void *fh, void *arg)
1917 {
1918         struct v4l2_buffer *b = arg;
1919         int ret = check_fmt(file, b->type);
1920
1921         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1922 }
1923
1924 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1925                                 struct file *file, void *fh, void *arg)
1926 {
1927         struct v4l2_streamparm *p = arg;
1928         v4l2_std_id std;
1929         int ret = check_fmt(file, p->type);
1930
1931         if (ret)
1932                 return ret;
1933         if (ops->vidioc_g_parm)
1934                 return ops->vidioc_g_parm(file, fh, p);
1935         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1936             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1937                 return -EINVAL;
1938         p->parm.capture.readbuffers = 2;
1939         ret = ops->vidioc_g_std(file, fh, &std);
1940         if (ret == 0)
1941                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1942         return ret;
1943 }
1944
1945 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1946                                 struct file *file, void *fh, void *arg)
1947 {
1948         struct v4l2_streamparm *p = arg;
1949         int ret = check_fmt(file, p->type);
1950
1951         if (ret)
1952                 return ret;
1953
1954         /* Note: extendedmode is never used in drivers */
1955         if (V4L2_TYPE_IS_OUTPUT(p->type)) {
1956                 memset(p->parm.output.reserved, 0,
1957                        sizeof(p->parm.output.reserved));
1958                 p->parm.output.extendedmode = 0;
1959                 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
1960         } else {
1961                 memset(p->parm.capture.reserved, 0,
1962                        sizeof(p->parm.capture.reserved));
1963                 p->parm.capture.extendedmode = 0;
1964                 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
1965         }
1966         return ops->vidioc_s_parm(file, fh, p);
1967 }
1968
1969 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1970                                 struct file *file, void *fh, void *arg)
1971 {
1972         struct video_device *vfd = video_devdata(file);
1973         struct v4l2_queryctrl *p = arg;
1974         struct v4l2_fh *vfh =
1975                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1976
1977         if (vfh && vfh->ctrl_handler)
1978                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1979         if (vfd->ctrl_handler)
1980                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1981         if (ops->vidioc_queryctrl)
1982                 return ops->vidioc_queryctrl(file, fh, p);
1983         return -ENOTTY;
1984 }
1985
1986 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1987                                 struct file *file, void *fh, void *arg)
1988 {
1989         struct video_device *vfd = video_devdata(file);
1990         struct v4l2_query_ext_ctrl *p = arg;
1991         struct v4l2_fh *vfh =
1992                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1993
1994         if (vfh && vfh->ctrl_handler)
1995                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1996         if (vfd->ctrl_handler)
1997                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1998         if (ops->vidioc_query_ext_ctrl)
1999                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2000         return -ENOTTY;
2001 }
2002
2003 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2004                                 struct file *file, void *fh, void *arg)
2005 {
2006         struct video_device *vfd = video_devdata(file);
2007         struct v4l2_querymenu *p = arg;
2008         struct v4l2_fh *vfh =
2009                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2010
2011         if (vfh && vfh->ctrl_handler)
2012                 return v4l2_querymenu(vfh->ctrl_handler, p);
2013         if (vfd->ctrl_handler)
2014                 return v4l2_querymenu(vfd->ctrl_handler, p);
2015         if (ops->vidioc_querymenu)
2016                 return ops->vidioc_querymenu(file, fh, p);
2017         return -ENOTTY;
2018 }
2019
2020 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2021                                 struct file *file, void *fh, void *arg)
2022 {
2023         struct video_device *vfd = video_devdata(file);
2024         struct v4l2_control *p = arg;
2025         struct v4l2_fh *vfh =
2026                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2027         struct v4l2_ext_controls ctrls;
2028         struct v4l2_ext_control ctrl;
2029
2030         if (vfh && vfh->ctrl_handler)
2031                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2032         if (vfd->ctrl_handler)
2033                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2034         if (ops->vidioc_g_ctrl)
2035                 return ops->vidioc_g_ctrl(file, fh, p);
2036         if (ops->vidioc_g_ext_ctrls == NULL)
2037                 return -ENOTTY;
2038
2039         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2040         ctrls.count = 1;
2041         ctrls.controls = &ctrl;
2042         ctrl.id = p->id;
2043         ctrl.value = p->value;
2044         if (check_ext_ctrls(&ctrls, 1)) {
2045                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2046
2047                 if (ret == 0)
2048                         p->value = ctrl.value;
2049                 return ret;
2050         }
2051         return -EINVAL;
2052 }
2053
2054 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2055                                 struct file *file, void *fh, void *arg)
2056 {
2057         struct video_device *vfd = video_devdata(file);
2058         struct v4l2_control *p = arg;
2059         struct v4l2_fh *vfh =
2060                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2061         struct v4l2_ext_controls ctrls;
2062         struct v4l2_ext_control ctrl;
2063
2064         if (vfh && vfh->ctrl_handler)
2065                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2066         if (vfd->ctrl_handler)
2067                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2068         if (ops->vidioc_s_ctrl)
2069                 return ops->vidioc_s_ctrl(file, fh, p);
2070         if (ops->vidioc_s_ext_ctrls == NULL)
2071                 return -ENOTTY;
2072
2073         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2074         ctrls.count = 1;
2075         ctrls.controls = &ctrl;
2076         ctrl.id = p->id;
2077         ctrl.value = p->value;
2078         if (check_ext_ctrls(&ctrls, 1))
2079                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2080         return -EINVAL;
2081 }
2082
2083 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2084                                 struct file *file, void *fh, void *arg)
2085 {
2086         struct video_device *vfd = video_devdata(file);
2087         struct v4l2_ext_controls *p = arg;
2088         struct v4l2_fh *vfh =
2089                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2090
2091         p->error_idx = p->count;
2092         if (vfh && vfh->ctrl_handler)
2093                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2094         if (vfd->ctrl_handler)
2095                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2096         if (ops->vidioc_g_ext_ctrls == NULL)
2097                 return -ENOTTY;
2098         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2099                                         -EINVAL;
2100 }
2101
2102 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2103                                 struct file *file, void *fh, void *arg)
2104 {
2105         struct video_device *vfd = video_devdata(file);
2106         struct v4l2_ext_controls *p = arg;
2107         struct v4l2_fh *vfh =
2108                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2109
2110         p->error_idx = p->count;
2111         if (vfh && vfh->ctrl_handler)
2112                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2113         if (vfd->ctrl_handler)
2114                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2115         if (ops->vidioc_s_ext_ctrls == NULL)
2116                 return -ENOTTY;
2117         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2118                                         -EINVAL;
2119 }
2120
2121 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2122                                 struct file *file, void *fh, void *arg)
2123 {
2124         struct video_device *vfd = video_devdata(file);
2125         struct v4l2_ext_controls *p = arg;
2126         struct v4l2_fh *vfh =
2127                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2128
2129         p->error_idx = p->count;
2130         if (vfh && vfh->ctrl_handler)
2131                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2132         if (vfd->ctrl_handler)
2133                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2134         if (ops->vidioc_try_ext_ctrls == NULL)
2135                 return -ENOTTY;
2136         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2137                                         -EINVAL;
2138 }
2139
2140 /*
2141  * The selection API specified originally that the _MPLANE buffer types
2142  * shouldn't be used. The reasons for this are lost in the mists of time
2143  * (or just really crappy memories). Regardless, this is really annoying
2144  * for userspace. So to keep things simple we map _MPLANE buffer types
2145  * to their 'regular' counterparts before calling the driver. And we
2146  * restore it afterwards. This way applications can use either buffer
2147  * type and drivers don't need to check for both.
2148  */
2149 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2150                            struct file *file, void *fh, void *arg)
2151 {
2152         struct v4l2_selection *p = arg;
2153         u32 old_type = p->type;
2154         int ret;
2155
2156         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2157                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2158         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2159                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2160         ret = ops->vidioc_g_selection(file, fh, p);
2161         p->type = old_type;
2162         return ret;
2163 }
2164
2165 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2166                            struct file *file, void *fh, void *arg)
2167 {
2168         struct v4l2_selection *p = arg;
2169         u32 old_type = p->type;
2170         int ret;
2171
2172         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2173                 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2174         else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2175                 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2176         ret = ops->vidioc_s_selection(file, fh, p);
2177         p->type = old_type;
2178         return ret;
2179 }
2180
2181 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2182                                 struct file *file, void *fh, void *arg)
2183 {
2184         struct v4l2_crop *p = arg;
2185         struct v4l2_selection s = {
2186                 .type = p->type,
2187         };
2188         int ret;
2189
2190         if (ops->vidioc_g_crop)
2191                 return ops->vidioc_g_crop(file, fh, p);
2192         /* simulate capture crop using selection api */
2193
2194         /* crop means compose for output devices */
2195         if (V4L2_TYPE_IS_OUTPUT(p->type))
2196                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2197         else
2198                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2199
2200         ret = v4l_g_selection(ops, file, fh, &s);
2201
2202         /* copying results to old structure on success */
2203         if (!ret)
2204                 p->c = s.r;
2205         return ret;
2206 }
2207
2208 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2209                                 struct file *file, void *fh, void *arg)
2210 {
2211         struct v4l2_crop *p = arg;
2212         struct v4l2_selection s = {
2213                 .type = p->type,
2214                 .r = p->c,
2215         };
2216
2217         if (ops->vidioc_s_crop)
2218                 return ops->vidioc_s_crop(file, fh, p);
2219         /* simulate capture crop using selection api */
2220
2221         /* crop means compose for output devices */
2222         if (V4L2_TYPE_IS_OUTPUT(p->type))
2223                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2224         else
2225                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2226
2227         return v4l_s_selection(ops, file, fh, &s);
2228 }
2229
2230 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2231                                 struct file *file, void *fh, void *arg)
2232 {
2233         struct v4l2_cropcap *p = arg;
2234         struct v4l2_selection s = { .type = p->type };
2235         int ret = 0;
2236
2237         /* setting trivial pixelaspect */
2238         p->pixelaspect.numerator = 1;
2239         p->pixelaspect.denominator = 1;
2240
2241         /*
2242          * The determine_valid_ioctls() call already should ensure
2243          * that this can never happen, but just in case...
2244          */
2245         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2246                 return -ENOTTY;
2247
2248         if (ops->vidioc_cropcap)
2249                 ret = ops->vidioc_cropcap(file, fh, p);
2250
2251         if (!ops->vidioc_g_selection)
2252                 return ret;
2253
2254         /*
2255          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2256          * square pixel aspect ratio in that case.
2257          */
2258         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2259                 return ret;
2260
2261         /* Use g_selection() to fill in the bounds and defrect rectangles */
2262
2263         /* obtaining bounds */
2264         if (V4L2_TYPE_IS_OUTPUT(p->type))
2265                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2266         else
2267                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2268
2269         ret = v4l_g_selection(ops, file, fh, &s);
2270         if (ret)
2271                 return ret;
2272         p->bounds = s.r;
2273
2274         /* obtaining defrect */
2275         if (V4L2_TYPE_IS_OUTPUT(p->type))
2276                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2277         else
2278                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2279
2280         ret = v4l_g_selection(ops, file, fh, &s);
2281         if (ret)
2282                 return ret;
2283         p->defrect = s.r;
2284
2285         return 0;
2286 }
2287
2288 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2289                                 struct file *file, void *fh, void *arg)
2290 {
2291         struct video_device *vfd = video_devdata(file);
2292         int ret;
2293
2294         if (vfd->v4l2_dev)
2295                 pr_info("%s: =================  START STATUS  =================\n",
2296                         vfd->v4l2_dev->name);
2297         ret = ops->vidioc_log_status(file, fh);
2298         if (vfd->v4l2_dev)
2299                 pr_info("%s: ==================  END STATUS  ==================\n",
2300                         vfd->v4l2_dev->name);
2301         return ret;
2302 }
2303
2304 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2305                                 struct file *file, void *fh, void *arg)
2306 {
2307 #ifdef CONFIG_VIDEO_ADV_DEBUG
2308         struct v4l2_dbg_register *p = arg;
2309         struct video_device *vfd = video_devdata(file);
2310         struct v4l2_subdev *sd;
2311         int idx = 0;
2312
2313         if (!capable(CAP_SYS_ADMIN))
2314                 return -EPERM;
2315         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2316                 if (vfd->v4l2_dev == NULL)
2317                         return -EINVAL;
2318                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2319                         if (p->match.addr == idx++)
2320                                 return v4l2_subdev_call(sd, core, g_register, p);
2321                 return -EINVAL;
2322         }
2323         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2324             (ops->vidioc_g_chip_info || p->match.addr == 0))
2325                 return ops->vidioc_g_register(file, fh, p);
2326         return -EINVAL;
2327 #else
2328         return -ENOTTY;
2329 #endif
2330 }
2331
2332 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2333                                 struct file *file, void *fh, void *arg)
2334 {
2335 #ifdef CONFIG_VIDEO_ADV_DEBUG
2336         const struct v4l2_dbg_register *p = arg;
2337         struct video_device *vfd = video_devdata(file);
2338         struct v4l2_subdev *sd;
2339         int idx = 0;
2340
2341         if (!capable(CAP_SYS_ADMIN))
2342                 return -EPERM;
2343         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2344                 if (vfd->v4l2_dev == NULL)
2345                         return -EINVAL;
2346                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2347                         if (p->match.addr == idx++)
2348                                 return v4l2_subdev_call(sd, core, s_register, p);
2349                 return -EINVAL;
2350         }
2351         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2352             (ops->vidioc_g_chip_info || p->match.addr == 0))
2353                 return ops->vidioc_s_register(file, fh, p);
2354         return -EINVAL;
2355 #else
2356         return -ENOTTY;
2357 #endif
2358 }
2359
2360 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2361                                 struct file *file, void *fh, void *arg)
2362 {
2363 #ifdef CONFIG_VIDEO_ADV_DEBUG
2364         struct video_device *vfd = video_devdata(file);
2365         struct v4l2_dbg_chip_info *p = arg;
2366         struct v4l2_subdev *sd;
2367         int idx = 0;
2368
2369         switch (p->match.type) {
2370         case V4L2_CHIP_MATCH_BRIDGE:
2371                 if (ops->vidioc_s_register)
2372                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2373                 if (ops->vidioc_g_register)
2374                         p->flags |= V4L2_CHIP_FL_READABLE;
2375                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2376                 if (ops->vidioc_g_chip_info)
2377                         return ops->vidioc_g_chip_info(file, fh, arg);
2378                 if (p->match.addr)
2379                         return -EINVAL;
2380                 return 0;
2381
2382         case V4L2_CHIP_MATCH_SUBDEV:
2383                 if (vfd->v4l2_dev == NULL)
2384                         break;
2385                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2386                         if (p->match.addr != idx++)
2387                                 continue;
2388                         if (sd->ops->core && sd->ops->core->s_register)
2389                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2390                         if (sd->ops->core && sd->ops->core->g_register)
2391                                 p->flags |= V4L2_CHIP_FL_READABLE;
2392                         strlcpy(p->name, sd->name, sizeof(p->name));
2393                         return 0;
2394                 }
2395                 break;
2396         }
2397         return -EINVAL;
2398 #else
2399         return -ENOTTY;
2400 #endif
2401 }
2402
2403 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2404                                 struct file *file, void *fh, void *arg)
2405 {
2406         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2407 }
2408
2409 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2410                                 struct file *file, void *fh, void *arg)
2411 {
2412         return ops->vidioc_subscribe_event(fh, arg);
2413 }
2414
2415 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2416                                 struct file *file, void *fh, void *arg)
2417 {
2418         return ops->vidioc_unsubscribe_event(fh, arg);
2419 }
2420
2421 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2422                                 struct file *file, void *fh, void *arg)
2423 {
2424         struct v4l2_sliced_vbi_cap *p = arg;
2425         int ret = check_fmt(file, p->type);
2426
2427         if (ret)
2428                 return ret;
2429
2430         /* Clear up to type, everything after type is zeroed already */
2431         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2432
2433         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2434 }
2435
2436 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2437                                 struct file *file, void *fh, void *arg)
2438 {
2439         struct video_device *vfd = video_devdata(file);
2440         struct v4l2_frequency_band *p = arg;
2441         enum v4l2_tuner_type type;
2442         int err;
2443
2444         if (vfd->vfl_type == VFL_TYPE_SDR) {
2445                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2446                         return -EINVAL;
2447                 type = p->type;
2448         } else {
2449                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2450                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2451                 if (type != p->type)
2452                         return -EINVAL;
2453         }
2454         if (ops->vidioc_enum_freq_bands) {
2455                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2456                 if (err != -ENOTTY)
2457                         return err;
2458         }
2459         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2460                 struct v4l2_tuner t = {
2461                         .index = p->tuner,
2462                         .type = type,
2463                 };
2464
2465                 if (p->index)
2466                         return -EINVAL;
2467                 err = ops->vidioc_g_tuner(file, fh, &t);
2468                 if (err)
2469                         return err;
2470                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2471                 p->rangelow = t.rangelow;
2472                 p->rangehigh = t.rangehigh;
2473                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2474                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2475                 return 0;
2476         }
2477         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2478                 struct v4l2_modulator m = {
2479                         .index = p->tuner,
2480                 };
2481
2482                 if (type != V4L2_TUNER_RADIO)
2483                         return -EINVAL;
2484                 if (p->index)
2485                         return -EINVAL;
2486                 err = ops->vidioc_g_modulator(file, fh, &m);
2487                 if (err)
2488                         return err;
2489                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2490                 p->rangelow = m.rangelow;
2491                 p->rangehigh = m.rangehigh;
2492                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2493                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2494                 return 0;
2495         }
2496         return -ENOTTY;
2497 }
2498
2499 struct v4l2_ioctl_info {
2500         unsigned int ioctl;
2501         u32 flags;
2502         const char * const name;
2503         union {
2504                 u32 offset;
2505                 int (*func)(const struct v4l2_ioctl_ops *ops,
2506                                 struct file *file, void *fh, void *p);
2507         } u;
2508         void (*debug)(const void *arg, bool write_only);
2509 };
2510
2511 /* This control needs a priority check */
2512 #define INFO_FL_PRIO            (1 << 0)
2513 /* This control can be valid if the filehandle passes a control handler. */
2514 #define INFO_FL_CTRL            (1 << 1)
2515 /* This is a standard ioctl, no need for special code */
2516 #define INFO_FL_STD             (1 << 2)
2517 /* This is ioctl has its own function */
2518 #define INFO_FL_FUNC            (1 << 3)
2519 /* Queuing ioctl */
2520 #define INFO_FL_QUEUE           (1 << 4)
2521 /* Always copy back result, even on error */
2522 #define INFO_FL_ALWAYS_COPY     (1 << 5)
2523 /* Zero struct from after the field to the end */
2524 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2525         ((offsetof(struct v4l2_struct, field) +                 \
2526           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2527 #define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2528
2529 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2530         [_IOC_NR(_ioctl)] = {                                           \
2531                 .ioctl = _ioctl,                                        \
2532                 .flags = _flags | INFO_FL_STD,                          \
2533                 .name = #_ioctl,                                        \
2534                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2535                 .debug = _debug,                                        \
2536         }
2537
2538 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2539         [_IOC_NR(_ioctl)] = {                                           \
2540                 .ioctl = _ioctl,                                        \
2541                 .flags = _flags | INFO_FL_FUNC,                         \
2542                 .name = #_ioctl,                                        \
2543                 .u.func = _func,                                        \
2544                 .debug = _debug,                                        \
2545         }
2546
2547 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2548         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2549         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2550         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2551         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2552         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2553         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2554         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2555         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2556         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2557         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2558         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2559         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2560         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2561         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2562         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2563         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2564         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2565         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2566         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2567         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2568         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2569         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2570         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2571         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2572         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2573         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2574         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2575         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2576         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2577         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2578         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2579         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2580         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2581         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2582         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2583         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2584         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2585         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2586         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2587         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2588         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2589         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2590         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2591         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2592         IOCTL_INFO_FNC(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2593         IOCTL_INFO_FNC(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2594         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2595         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2596         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2597         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2598         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2599         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2600         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2601         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2602         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)),
2603         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2604         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2605         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2606         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2607         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2608         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2609         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2610         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2611         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2612         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2613         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2614         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2615         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2616         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2617         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)),
2618         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2619         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2620         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2621         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2622         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2623         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2624         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2625         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2626         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2627         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2628         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)),
2629         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)),
2630 };
2631 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2632
2633 bool v4l2_is_known_ioctl(unsigned int cmd)
2634 {
2635         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2636                 return false;
2637         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2638 }
2639
2640 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2641 {
2642         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2643                 return vdev->lock;
2644         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2645                 return NULL;
2646         if (vdev->queue && vdev->queue->lock &&
2647                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2648                 return vdev->queue->lock;
2649         return vdev->lock;
2650 }
2651
2652 /* Common ioctl debug function. This function can be used by
2653    external ioctl messages as well as internal V4L ioctl */
2654 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2655 {
2656         const char *dir, *type;
2657
2658         if (prefix)
2659                 printk(KERN_DEBUG "%s: ", prefix);
2660
2661         switch (_IOC_TYPE(cmd)) {
2662         case 'd':
2663                 type = "v4l2_int";
2664                 break;
2665         case 'V':
2666                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2667                         type = "v4l2";
2668                         break;
2669                 }
2670                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2671                 return;
2672         default:
2673                 type = "unknown";
2674                 break;
2675         }
2676
2677         switch (_IOC_DIR(cmd)) {
2678         case _IOC_NONE:              dir = "--"; break;
2679         case _IOC_READ:              dir = "r-"; break;
2680         case _IOC_WRITE:             dir = "-w"; break;
2681         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2682         default:                     dir = "*ERR*"; break;
2683         }
2684         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2685                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2686 }
2687 EXPORT_SYMBOL(v4l_printk_ioctl);
2688
2689 static long __video_do_ioctl(struct file *file,
2690                 unsigned int cmd, void *arg)
2691 {
2692         struct video_device *vfd = video_devdata(file);
2693         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2694         bool write_only = false;
2695         struct v4l2_ioctl_info default_info;
2696         const struct v4l2_ioctl_info *info;
2697         void *fh = file->private_data;
2698         struct v4l2_fh *vfh = NULL;
2699         int dev_debug = vfd->dev_debug;
2700         long ret = -ENOTTY;
2701
2702         if (ops == NULL) {
2703                 pr_warn("%s: has no ioctl_ops.\n",
2704                                 video_device_node_name(vfd));
2705                 return ret;
2706         }
2707
2708         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2709                 vfh = file->private_data;
2710
2711         if (v4l2_is_known_ioctl(cmd)) {
2712                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2713
2714                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2715                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2716                         goto done;
2717
2718                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2719                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2720                         if (ret)
2721                                 goto done;
2722                 }
2723         } else {
2724                 default_info.ioctl = cmd;
2725                 default_info.flags = 0;
2726                 default_info.debug = v4l_print_default;
2727                 info = &default_info;
2728         }
2729
2730         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2731         if (info->flags & INFO_FL_STD) {
2732                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2733                 const void *p = vfd->ioctl_ops;
2734                 const vidioc_op *vidioc = p + info->u.offset;
2735
2736                 ret = (*vidioc)(file, fh, arg);
2737         } else if (info->flags & INFO_FL_FUNC) {
2738                 ret = info->u.func(ops, file, fh, arg);
2739         } else if (!ops->vidioc_default) {
2740                 ret = -ENOTTY;
2741         } else {
2742                 ret = ops->vidioc_default(file, fh,
2743                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2744                         cmd, arg);
2745         }
2746
2747 done:
2748         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2749                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2750                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2751                         return ret;
2752
2753                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2754                 if (ret < 0)
2755                         pr_cont(": error %ld", ret);
2756                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2757                         pr_cont("\n");
2758                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2759                         info->debug(arg, write_only);
2760                 else {
2761                         pr_cont(": ");
2762                         info->debug(arg, write_only);
2763                 }
2764         }
2765
2766         return ret;
2767 }
2768
2769 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2770                             void __user **user_ptr, void ***kernel_ptr)
2771 {
2772         int ret = 0;
2773
2774         switch (cmd) {
2775         case VIDIOC_PREPARE_BUF:
2776         case VIDIOC_QUERYBUF:
2777         case VIDIOC_QBUF:
2778         case VIDIOC_DQBUF: {
2779                 struct v4l2_buffer *buf = parg;
2780
2781                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2782                         if (buf->length > VIDEO_MAX_PLANES) {
2783                                 ret = -EINVAL;
2784                                 break;
2785                         }
2786                         *user_ptr = (void __user *)buf->m.planes;
2787                         *kernel_ptr = (void **)&buf->m.planes;
2788                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2789                         ret = 1;
2790                 }
2791                 break;
2792         }
2793
2794         case VIDIOC_G_EDID:
2795         case VIDIOC_S_EDID: {
2796                 struct v4l2_edid *edid = parg;
2797
2798                 if (edid->blocks) {
2799                         if (edid->blocks > 256) {
2800                                 ret = -EINVAL;
2801                                 break;
2802                         }
2803                         *user_ptr = (void __user *)edid->edid;
2804                         *kernel_ptr = (void **)&edid->edid;
2805                         *array_size = edid->blocks * 128;
2806                         ret = 1;
2807                 }
2808                 break;
2809         }
2810
2811         case VIDIOC_S_EXT_CTRLS:
2812         case VIDIOC_G_EXT_CTRLS:
2813         case VIDIOC_TRY_EXT_CTRLS: {
2814                 struct v4l2_ext_controls *ctrls = parg;
2815
2816                 if (ctrls->count != 0) {
2817                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2818                                 ret = -EINVAL;
2819                                 break;
2820                         }
2821                         *user_ptr = (void __user *)ctrls->controls;
2822                         *kernel_ptr = (void **)&ctrls->controls;
2823                         *array_size = sizeof(struct v4l2_ext_control)
2824                                     * ctrls->count;
2825                         ret = 1;
2826                 }
2827                 break;
2828         }
2829         }
2830
2831         return ret;
2832 }
2833
2834 long
2835 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2836                v4l2_kioctl func)
2837 {
2838         char    sbuf[128];
2839         void    *mbuf = NULL, *array_buf = NULL;
2840         void    *parg = (void *)arg;
2841         long    err  = -EINVAL;
2842         bool    has_array_args;
2843         bool    always_copy = false;
2844         size_t  array_size = 0;
2845         void __user *user_ptr = NULL;
2846         void    **kernel_ptr = NULL;
2847
2848         /*  Copy arguments into temp kernel buffer  */
2849         if (_IOC_DIR(cmd) != _IOC_NONE) {
2850                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2851                         parg = sbuf;
2852                 } else {
2853                         /* too big to allocate from stack */
2854                         mbuf = kvmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2855                         if (NULL == mbuf)
2856                                 return -ENOMEM;
2857                         parg = mbuf;
2858                 }
2859
2860                 err = -EFAULT;
2861                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2862                         unsigned int n = _IOC_SIZE(cmd);
2863
2864                         /*
2865                          * In some cases, only a few fields are used as input,
2866                          * i.e. when the app sets "index" and then the driver
2867                          * fills in the rest of the structure for the thing
2868                          * with that index.  We only need to copy up the first
2869                          * non-input field.
2870                          */
2871                         if (v4l2_is_known_ioctl(cmd)) {
2872                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2873
2874                                 if (flags & INFO_FL_CLEAR_MASK)
2875                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2876                                 always_copy = flags & INFO_FL_ALWAYS_COPY;
2877                         }
2878
2879                         if (copy_from_user(parg, (void __user *)arg, n))
2880                                 goto out;
2881
2882                         /* zero out anything we don't copy from userspace */
2883                         if (n < _IOC_SIZE(cmd))
2884                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2885                 } else {
2886                         /* read-only ioctl */
2887                         memset(parg, 0, _IOC_SIZE(cmd));
2888                 }
2889         }
2890
2891         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2892         if (err < 0)
2893                 goto out;
2894         has_array_args = err;
2895
2896         if (has_array_args) {
2897                 array_buf = kvmalloc(array_size, GFP_KERNEL);
2898                 err = -ENOMEM;
2899                 if (array_buf == NULL)
2900                         goto out_array_args;
2901                 err = -EFAULT;
2902                 if (copy_from_user(array_buf, user_ptr, array_size))
2903                         goto out_array_args;
2904                 *kernel_ptr = array_buf;
2905         }
2906
2907         /* Handles IOCTL */
2908         err = func(file, cmd, parg);
2909         if (err == -ENOTTY || err == -ENOIOCTLCMD) {
2910                 err = -ENOTTY;
2911                 goto out;
2912         }
2913
2914         if (err == 0) {
2915                 if (cmd == VIDIOC_DQBUF)
2916                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2917                 else if (cmd == VIDIOC_QBUF)
2918                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2919         }
2920
2921         if (has_array_args) {
2922                 *kernel_ptr = (void __force *)user_ptr;
2923                 if (copy_to_user(user_ptr, array_buf, array_size))
2924                         err = -EFAULT;
2925                 goto out_array_args;
2926         }
2927         /*
2928          * Some ioctls can return an error, but still have valid
2929          * results that must be returned.
2930          */
2931         if (err < 0 && !always_copy)
2932                 goto out;
2933
2934 out_array_args:
2935         /*  Copy results into user buffer  */
2936         switch (_IOC_DIR(cmd)) {
2937         case _IOC_READ:
2938         case (_IOC_WRITE | _IOC_READ):
2939                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2940                         err = -EFAULT;
2941                 break;
2942         }
2943
2944 out:
2945         kvfree(array_buf);
2946         kvfree(mbuf);
2947         return err;
2948 }
2949 EXPORT_SYMBOL(video_usercopy);
2950
2951 long video_ioctl2(struct file *file,
2952                unsigned int cmd, unsigned long arg)
2953 {
2954         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2955 }
2956 EXPORT_SYMBOL(video_ioctl2);