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

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/videobuf2-v4l2.h>
  30 #include <media/v4l2-mc.h>
  31
  32 #include <trace/events/v4l2.h>
  33
  34 /* Zero out the end of the struct pointed to by p.  Everything after, but
  35  * not including, the specified field is cleared. */
  36 #define CLEAR_AFTER_FIELD(p, field) \
  37         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42 struct std_descr {
  43         v4l2_std_id std;
  44         const char *descr;
  45 };
  46
  47 static const struct std_descr standards[] = {
  48         { V4L2_STD_NTSC,        "NTSC"      },
  49         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  50         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  51         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  52         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  53         { V4L2_STD_PAL,         "PAL"       },
  54         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  55         { V4L2_STD_PAL_B,       "PAL-B"     },
  56         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  57         { V4L2_STD_PAL_G,       "PAL-G"     },
  58         { V4L2_STD_PAL_H,       "PAL-H"     },
  59         { V4L2_STD_PAL_I,       "PAL-I"     },
  60         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  61         { V4L2_STD_PAL_D,       "PAL-D"     },
  62         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  63         { V4L2_STD_PAL_K,       "PAL-K"     },
  64         { V4L2_STD_PAL_M,       "PAL-M"     },
  65         { V4L2_STD_PAL_N,       "PAL-N"     },
  66         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  67         { V4L2_STD_PAL_60,      "PAL-60"    },
  68         { V4L2_STD_SECAM,       "SECAM"     },
  69         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  70         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  71         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  72         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  73         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  74         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  75         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  76         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  77         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  78         { 0,                    "Unknown"   }
  79 };
  80
  81 /* video4linux standard ID conversion to standard name
  82  */
  83 const char *v4l2_norm_to_name(v4l2_std_id id)
  84 {
  85         u32 myid = id;
  86         int i;
  87
  88         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89            64 bit comparations. So, on that architecture, with some gcc
  90            variants, compilation fails. Currently, the max value is 30bit wide.
  91          */
  92         BUG_ON(myid != id);
  93
  94         for (i = 0; standards[i].std; i++)
  95                 if (myid == standards[i].std)
  96                         break;
  97         return standards[i].descr;
  98 }
  99 EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101 /* Returns frame period for the given standard */
 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103 {
 104         if (id & V4L2_STD_525_60) {
 105                 frameperiod->numerator = 1001;
 106                 frameperiod->denominator = 30000;
 107         } else {
 108                 frameperiod->numerator = 1;
 109                 frameperiod->denominator = 25;
 110         }
 111 }
 112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114 /* Fill in the fields of a v4l2_standard structure according to the
 115    'id' and 'transmission' parameters.  Returns negative on error.  */
 116 int v4l2_video_std_construct(struct v4l2_standard *vs,
 117                              int id, const char *name)
 118 {
 119         vs->id = id;
 120         v4l2_video_std_frame_period(id, &vs->frameperiod);
 121         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122         strlcpy(vs->name, name, sizeof(vs->name));
 123         return 0;
 124 }
 125 EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127 /* ----------------------------------------------------------------- */
 128 /* some arrays for pretty-printing debug messages of enum types      */
 129
 130 const char *v4l2_field_names[] = {
 131         [V4L2_FIELD_ANY]        = "any",
 132         [V4L2_FIELD_NONE]       = "none",
 133         [V4L2_FIELD_TOP]        = "top",
 134         [V4L2_FIELD_BOTTOM]     = "bottom",
 135         [V4L2_FIELD_INTERLACED] = "interlaced",
 136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138         [V4L2_FIELD_ALTERNATE]  = "alternate",
 139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141 };
 142 EXPORT_SYMBOL(v4l2_field_names);
 143
 144 const char *v4l2_type_names[] = {
 145         [0]                                = "0",
 146         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 147         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 148         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 149         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 150         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 151         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 152         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 153         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 154         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 155         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 156         [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 157         [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 158 };
 159 EXPORT_SYMBOL(v4l2_type_names);
 160
 161 static const char *v4l2_memory_names[] = {
 162         [V4L2_MEMORY_MMAP]    = "mmap",
 163         [V4L2_MEMORY_USERPTR] = "userptr",
 164         [V4L2_MEMORY_OVERLAY] = "overlay",
 165         [V4L2_MEMORY_DMABUF] = "dmabuf",
 166 };
 167
 168 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 169
 170 /* ------------------------------------------------------------------ */
 171 /* debug help functions                                               */
 172
 173 static void v4l_print_querycap(const void *arg, bool write_only)
 174 {
 175         const struct v4l2_capability *p = arg;
 176
 177         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 178                 (int)sizeof(p->driver), p->driver,
 179                 (int)sizeof(p->card), p->card,
 180                 (int)sizeof(p->bus_info), p->bus_info,
 181                 p->version, p->capabilities, p->device_caps);
 182 }
 183
 184 static void v4l_print_enuminput(const void *arg, bool write_only)
 185 {
 186         const struct v4l2_input *p = arg;
 187
 188         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 189                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 190                 p->tuner, (unsigned long long)p->std, p->status,
 191                 p->capabilities);
 192 }
 193
 194 static void v4l_print_enumoutput(const void *arg, bool write_only)
 195 {
 196         const struct v4l2_output *p = arg;
 197
 198         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 199                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 200                 p->modulator, (unsigned long long)p->std, p->capabilities);
 201 }
 202
 203 static void v4l_print_audio(const void *arg, bool write_only)
 204 {
 205         const struct v4l2_audio *p = arg;
 206
 207         if (write_only)
 208                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 209         else
 210                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 211                         p->index, (int)sizeof(p->name), p->name,
 212                         p->capability, p->mode);
 213 }
 214
 215 static void v4l_print_audioout(const void *arg, bool write_only)
 216 {
 217         const struct v4l2_audioout *p = arg;
 218
 219         if (write_only)
 220                 pr_cont("index=%u\n", p->index);
 221         else
 222                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 223                         p->index, (int)sizeof(p->name), p->name,
 224                         p->capability, p->mode);
 225 }
 226
 227 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 228 {
 229         const struct v4l2_fmtdesc *p = arg;
 230
 231         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 232                 p->index, prt_names(p->type, v4l2_type_names),
 233                 p->flags, (p->pixelformat & 0xff),
 234                 (p->pixelformat >>  8) & 0xff,
 235                 (p->pixelformat >> 16) & 0xff,
 236                 (p->pixelformat >> 24) & 0xff,
 237                 (int)sizeof(p->description), p->description);
 238 }
 239
 240 static void v4l_print_format(const void *arg, bool write_only)
 241 {
 242         const struct v4l2_format *p = arg;
 243         const struct v4l2_pix_format *pix;
 244         const struct v4l2_pix_format_mplane *mp;
 245         const struct v4l2_vbi_format *vbi;
 246         const struct v4l2_sliced_vbi_format *sliced;
 247         const struct v4l2_window *win;
 248         const struct v4l2_sdr_format *sdr;
 249         unsigned i;
 250
 251         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 252         switch (p->type) {
 253         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 254         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 255                 pix = &p->fmt.pix;
 256                 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",
 257                         pix->width, pix->height,
 258                         (pix->pixelformat & 0xff),
 259                         (pix->pixelformat >>  8) & 0xff,
 260                         (pix->pixelformat >> 16) & 0xff,
 261                         (pix->pixelformat >> 24) & 0xff,
 262                         prt_names(pix->field, v4l2_field_names),
 263                         pix->bytesperline, pix->sizeimage,
 264                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 265                         pix->quantization, pix->xfer_func);
 266                 break;
 267         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 268         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 269                 mp = &p->fmt.pix_mp;
 270                 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",
 271                         mp->width, mp->height,
 272                         (mp->pixelformat & 0xff),
 273                         (mp->pixelformat >>  8) & 0xff,
 274                         (mp->pixelformat >> 16) & 0xff,
 275                         (mp->pixelformat >> 24) & 0xff,
 276                         prt_names(mp->field, v4l2_field_names),
 277                         mp->colorspace, mp->num_planes, mp->flags,
 278                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 279                 for (i = 0; i < mp->num_planes; i++)
 280                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 281                                         mp->plane_fmt[i].bytesperline,
 282                                         mp->plane_fmt[i].sizeimage);
 283                 break;
 284         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 285         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 286                 win = &p->fmt.win;
 287                 /* Note: we can't print the clip list here since the clips
 288                  * pointer is a userspace pointer, not a kernelspace
 289                  * pointer. */
 290                 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",
 291                         win->w.width, win->w.height, win->w.left, win->w.top,
 292                         prt_names(win->field, v4l2_field_names),
 293                         win->chromakey, win->clipcount, win->clips,
 294                         win->bitmap, win->global_alpha);
 295                 break;
 296         case V4L2_BUF_TYPE_VBI_CAPTURE:
 297         case V4L2_BUF_TYPE_VBI_OUTPUT:
 298                 vbi = &p->fmt.vbi;
 299                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 300                         vbi->sampling_rate, vbi->offset,
 301                         vbi->samples_per_line,
 302                         (vbi->sample_format & 0xff),
 303                         (vbi->sample_format >>  8) & 0xff,
 304                         (vbi->sample_format >> 16) & 0xff,
 305                         (vbi->sample_format >> 24) & 0xff,
 306                         vbi->start[0], vbi->start[1],
 307                         vbi->count[0], vbi->count[1]);
 308                 break;
 309         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 310         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 311                 sliced = &p->fmt.sliced;
 312                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 313                                 sliced->service_set, sliced->io_size);
 314                 for (i = 0; i < 24; i++)
 315                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 316                                 sliced->service_lines[0][i],
 317                                 sliced->service_lines[1][i]);
 318                 break;
 319         case V4L2_BUF_TYPE_SDR_CAPTURE:
 320         case V4L2_BUF_TYPE_SDR_OUTPUT:
 321                 sdr = &p->fmt.sdr;
 322                 pr_cont(", pixelformat=%c%c%c%c\n",
 323                         (sdr->pixelformat >>  0) & 0xff,
 324                         (sdr->pixelformat >>  8) & 0xff,
 325                         (sdr->pixelformat >> 16) & 0xff,
 326                         (sdr->pixelformat >> 24) & 0xff);
 327                 break;
 328         }
 329 }
 330
 331 static void v4l_print_framebuffer(const void *arg, bool write_only)
 332 {
 333         const struct v4l2_framebuffer *p = arg;
 334
 335         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",
 336                         p->capability, p->flags, p->base,
 337                         p->fmt.width, p->fmt.height,
 338                         (p->fmt.pixelformat & 0xff),
 339                         (p->fmt.pixelformat >>  8) & 0xff,
 340                         (p->fmt.pixelformat >> 16) & 0xff,
 341                         (p->fmt.pixelformat >> 24) & 0xff,
 342                         p->fmt.bytesperline, p->fmt.sizeimage,
 343                         p->fmt.colorspace);
 344 }
 345
 346 static void v4l_print_buftype(const void *arg, bool write_only)
 347 {
 348         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 349 }
 350
 351 static void v4l_print_modulator(const void *arg, bool write_only)
 352 {
 353         const struct v4l2_modulator *p = arg;
 354
 355         if (write_only)
 356                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 357         else
 358                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 359                         p->index, (int)sizeof(p->name), p->name, p->capability,
 360                         p->rangelow, p->rangehigh, p->txsubchans);
 361 }
 362
 363 static void v4l_print_tuner(const void *arg, bool write_only)
 364 {
 365         const struct v4l2_tuner *p = arg;
 366
 367         if (write_only)
 368                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 369         else
 370                 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",
 371                         p->index, (int)sizeof(p->name), p->name, p->type,
 372                         p->capability, p->rangelow,
 373                         p->rangehigh, p->signal, p->afc,
 374                         p->rxsubchans, p->audmode);
 375 }
 376
 377 static void v4l_print_frequency(const void *arg, bool write_only)
 378 {
 379         const struct v4l2_frequency *p = arg;
 380
 381         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 382                                 p->tuner, p->type, p->frequency);
 383 }
 384
 385 static void v4l_print_standard(const void *arg, bool write_only)
 386 {
 387         const struct v4l2_standard *p = arg;
 388
 389         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 390                 p->index,
 391                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 392                 p->frameperiod.numerator,
 393                 p->frameperiod.denominator,
 394                 p->framelines);
 395 }
 396
 397 static void v4l_print_std(const void *arg, bool write_only)
 398 {
 399         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 400 }
 401
 402 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 403 {
 404         const struct v4l2_hw_freq_seek *p = arg;
 405
 406         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 407                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 408                 p->rangelow, p->rangehigh);
 409 }
 410
 411 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 412 {
 413         const struct v4l2_requestbuffers *p = arg;
 414
 415         pr_cont("count=%d, type=%s, memory=%s\n",
 416                 p->count,
 417                 prt_names(p->type, v4l2_type_names),
 418                 prt_names(p->memory, v4l2_memory_names));
 419 }
 420
 421 static void v4l_print_buffer(const void *arg, bool write_only)
 422 {
 423         const struct v4l2_buffer *p = arg;
 424         const struct v4l2_timecode *tc = &p->timecode;
 425         const struct v4l2_plane *plane;
 426         int i;
 427
 428         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 429                         p->timestamp.tv_sec / 3600,
 430                         (int)(p->timestamp.tv_sec / 60) % 60,
 431                         (int)(p->timestamp.tv_sec % 60),
 432                         (long)p->timestamp.tv_usec,
 433                         p->index,
 434                         prt_names(p->type, v4l2_type_names),
 435                         p->flags, prt_names(p->field, v4l2_field_names),
 436                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 437
 438         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 439                 pr_cont("\n");
 440                 for (i = 0; i < p->length; ++i) {
 441                         plane = &p->m.planes[i];
 442                         printk(KERN_DEBUG
 443                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 444                                 i, plane->bytesused, plane->data_offset,
 445                                 plane->m.userptr, plane->length);
 446                 }
 447         } else {
 448                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 449                         p->bytesused, p->m.userptr, p->length);
 450         }
 451
 452         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 453                         tc->hours, tc->minutes, tc->seconds,
 454                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 455 }
 456
 457 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 458 {
 459         const struct v4l2_exportbuffer *p = arg;
 460
 461         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 462                 p->fd, prt_names(p->type, v4l2_type_names),
 463                 p->index, p->plane, p->flags);
 464 }
 465
 466 static void v4l_print_create_buffers(const void *arg, bool write_only)
 467 {
 468         const struct v4l2_create_buffers *p = arg;
 469
 470         pr_cont("index=%d, count=%d, memory=%s, ",
 471                         p->index, p->count,
 472                         prt_names(p->memory, v4l2_memory_names));
 473         v4l_print_format(&p->format, write_only);
 474 }
 475
 476 static void v4l_print_streamparm(const void *arg, bool write_only)
 477 {
 478         const struct v4l2_streamparm *p = arg;
 479
 480         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 481
 482         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 483             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 484                 const struct v4l2_captureparm *c = &p->parm.capture;
 485
 486                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 487                         c->capability, c->capturemode,
 488                         c->timeperframe.numerator, c->timeperframe.denominator,
 489                         c->extendedmode, c->readbuffers);
 490         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 491                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 492                 const struct v4l2_outputparm *c = &p->parm.output;
 493
 494                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 495                         c->capability, c->outputmode,
 496                         c->timeperframe.numerator, c->timeperframe.denominator,
 497                         c->extendedmode, c->writebuffers);
 498         } else {
 499                 pr_cont("\n");
 500         }
 501 }
 502
 503 static void v4l_print_queryctrl(const void *arg, bool write_only)
 504 {
 505         const struct v4l2_queryctrl *p = arg;
 506
 507         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 508                         p->id, p->type, (int)sizeof(p->name), p->name,
 509                         p->minimum, p->maximum,
 510                         p->step, p->default_value, p->flags);
 511 }
 512
 513 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 514 {
 515         const struct v4l2_query_ext_ctrl *p = arg;
 516
 517         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",
 518                         p->id, p->type, (int)sizeof(p->name), p->name,
 519                         p->minimum, p->maximum,
 520                         p->step, p->default_value, p->flags,
 521                         p->elem_size, p->elems, p->nr_of_dims,
 522                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 523 }
 524
 525 static void v4l_print_querymenu(const void *arg, bool write_only)
 526 {
 527         const struct v4l2_querymenu *p = arg;
 528
 529         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 530 }
 531
 532 static void v4l_print_control(const void *arg, bool write_only)
 533 {
 534         const struct v4l2_control *p = arg;
 535
 536         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 537 }
 538
 539 static void v4l_print_ext_controls(const void *arg, bool write_only)
 540 {
 541         const struct v4l2_ext_controls *p = arg;
 542         int i;
 543
 544         pr_cont("which=0x%x, count=%d, error_idx=%d",
 545                         p->which, p->count, p->error_idx);
 546         for (i = 0; i < p->count; i++) {
 547                 if (!p->controls[i].size)
 548                         pr_cont(", id/val=0x%x/0x%x",
 549                                 p->controls[i].id, p->controls[i].value);
 550                 else
 551                         pr_cont(", id/size=0x%x/%u",
 552                                 p->controls[i].id, p->controls[i].size);
 553         }
 554         pr_cont("\n");
 555 }
 556
 557 static void v4l_print_cropcap(const void *arg, bool write_only)
 558 {
 559         const struct v4l2_cropcap *p = arg;
 560
 561         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 562                 prt_names(p->type, v4l2_type_names),
 563                 p->bounds.width, p->bounds.height,
 564                 p->bounds.left, p->bounds.top,
 565                 p->defrect.width, p->defrect.height,
 566                 p->defrect.left, p->defrect.top,
 567                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 568 }
 569
 570 static void v4l_print_crop(const void *arg, bool write_only)
 571 {
 572         const struct v4l2_crop *p = arg;
 573
 574         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 575                 prt_names(p->type, v4l2_type_names),
 576                 p->c.width, p->c.height,
 577                 p->c.left, p->c.top);
 578 }
 579
 580 static void v4l_print_selection(const void *arg, bool write_only)
 581 {
 582         const struct v4l2_selection *p = arg;
 583
 584         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 585                 prt_names(p->type, v4l2_type_names),
 586                 p->target, p->flags,
 587                 p->r.width, p->r.height, p->r.left, p->r.top);
 588 }
 589
 590 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 591 {
 592         const struct v4l2_jpegcompression *p = arg;
 593
 594         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 595                 p->quality, p->APPn, p->APP_len,
 596                 p->COM_len, p->jpeg_markers);
 597 }
 598
 599 static void v4l_print_enc_idx(const void *arg, bool write_only)
 600 {
 601         const struct v4l2_enc_idx *p = arg;
 602
 603         pr_cont("entries=%d, entries_cap=%d\n",
 604                         p->entries, p->entries_cap);
 605 }
 606
 607 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 608 {
 609         const struct v4l2_encoder_cmd *p = arg;
 610
 611         pr_cont("cmd=%d, flags=0x%x\n",
 612                         p->cmd, p->flags);
 613 }
 614
 615 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 616 {
 617         const struct v4l2_decoder_cmd *p = arg;
 618
 619         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 620
 621         if (p->cmd == V4L2_DEC_CMD_START)
 622                 pr_info("speed=%d, format=%u\n",
 623                                 p->start.speed, p->start.format);
 624         else if (p->cmd == V4L2_DEC_CMD_STOP)
 625                 pr_info("pts=%llu\n", p->stop.pts);
 626 }
 627
 628 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 629 {
 630         const struct v4l2_dbg_chip_info *p = arg;
 631
 632         pr_cont("type=%u, ", p->match.type);
 633         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 634                 pr_cont("name=%.*s, ",
 635                                 (int)sizeof(p->match.name), p->match.name);
 636         else
 637                 pr_cont("addr=%u, ", p->match.addr);
 638         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 639 }
 640
 641 static void v4l_print_dbg_register(const void *arg, bool write_only)
 642 {
 643         const struct v4l2_dbg_register *p = arg;
 644
 645         pr_cont("type=%u, ", p->match.type);
 646         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 647                 pr_cont("name=%.*s, ",
 648                                 (int)sizeof(p->match.name), p->match.name);
 649         else
 650                 pr_cont("addr=%u, ", p->match.addr);
 651         pr_cont("reg=0x%llx, val=0x%llx\n",
 652                         p->reg, p->val);
 653 }
 654
 655 static void v4l_print_dv_timings(const void *arg, bool write_only)
 656 {
 657         const struct v4l2_dv_timings *p = arg;
 658
 659         switch (p->type) {
 660         case V4L2_DV_BT_656_1120:
 661                 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",
 662                                 p->bt.interlaced, p->bt.pixelclock,
 663                                 p->bt.width, p->bt.height,
 664                                 p->bt.polarities, p->bt.hfrontporch,
 665                                 p->bt.hsync, p->bt.hbackporch,
 666                                 p->bt.vfrontporch, p->bt.vsync,
 667                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 668                                 p->bt.il_vsync, p->bt.il_vbackporch,
 669                                 p->bt.standards, p->bt.flags);
 670                 break;
 671         default:
 672                 pr_cont("type=%d\n", p->type);
 673                 break;
 674         }
 675 }
 676
 677 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 678 {
 679         const struct v4l2_enum_dv_timings *p = arg;
 680
 681         pr_cont("index=%u, ", p->index);
 682         v4l_print_dv_timings(&p->timings, write_only);
 683 }
 684
 685 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 686 {
 687         const struct v4l2_dv_timings_cap *p = arg;
 688
 689         switch (p->type) {
 690         case V4L2_DV_BT_656_1120:
 691                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 692                         p->bt.min_width, p->bt.max_width,
 693                         p->bt.min_height, p->bt.max_height,
 694                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 695                         p->bt.standards, p->bt.capabilities);
 696                 break;
 697         default:
 698                 pr_cont("type=%u\n", p->type);
 699                 break;
 700         }
 701 }
 702
 703 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 704 {
 705         const struct v4l2_frmsizeenum *p = arg;
 706
 707         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 708                         p->index,
 709                         (p->pixel_format & 0xff),
 710                         (p->pixel_format >>  8) & 0xff,
 711                         (p->pixel_format >> 16) & 0xff,
 712                         (p->pixel_format >> 24) & 0xff,
 713                         p->type);
 714         switch (p->type) {
 715         case V4L2_FRMSIZE_TYPE_DISCRETE:
 716                 pr_cont(", wxh=%ux%u\n",
 717                         p->discrete.width, p->discrete.height);
 718                 break;
 719         case V4L2_FRMSIZE_TYPE_STEPWISE:
 720                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 721                                 p->stepwise.min_width,  p->stepwise.min_height,
 722                                 p->stepwise.step_width, p->stepwise.step_height,
 723                                 p->stepwise.max_width,  p->stepwise.max_height);
 724                 break;
 725         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 726                 /* fall through */
 727         default:
 728                 pr_cont("\n");
 729                 break;
 730         }
 731 }
 732
 733 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 734 {
 735         const struct v4l2_frmivalenum *p = arg;
 736
 737         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 738                         p->index,
 739                         (p->pixel_format & 0xff),
 740                         (p->pixel_format >>  8) & 0xff,
 741                         (p->pixel_format >> 16) & 0xff,
 742                         (p->pixel_format >> 24) & 0xff,
 743                         p->width, p->height, p->type);
 744         switch (p->type) {
 745         case V4L2_FRMIVAL_TYPE_DISCRETE:
 746                 pr_cont(", fps=%d/%d\n",
 747                                 p->discrete.numerator,
 748                                 p->discrete.denominator);
 749                 break;
 750         case V4L2_FRMIVAL_TYPE_STEPWISE:
 751                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 752                                 p->stepwise.min.numerator,
 753                                 p->stepwise.min.denominator,
 754                                 p->stepwise.max.numerator,
 755                                 p->stepwise.max.denominator,
 756                                 p->stepwise.step.numerator,
 757                                 p->stepwise.step.denominator);
 758                 break;
 759         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 760                 /* fall through */
 761         default:
 762                 pr_cont("\n");
 763                 break;
 764         }
 765 }
 766
 767 static void v4l_print_event(const void *arg, bool write_only)
 768 {
 769         const struct v4l2_event *p = arg;
 770         const struct v4l2_event_ctrl *c;
 771
 772         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 773                         p->type, p->pending, p->sequence, p->id,
 774                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 775         switch (p->type) {
 776         case V4L2_EVENT_VSYNC:
 777                 printk(KERN_DEBUG "field=%s\n",
 778                         prt_names(p->u.vsync.field, v4l2_field_names));
 779                 break;
 780         case V4L2_EVENT_CTRL:
 781                 c = &p->u.ctrl;
 782                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 783                         c->changes, c->type);
 784                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 785                         pr_cont("value64=%lld, ", c->value64);
 786                 else
 787                         pr_cont("value=%d, ", c->value);
 788                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 789                         c->flags, c->minimum, c->maximum,
 790                         c->step, c->default_value);
 791                 break;
 792         case V4L2_EVENT_FRAME_SYNC:
 793                 pr_cont("frame_sequence=%u\n",
 794                         p->u.frame_sync.frame_sequence);
 795                 break;
 796         }
 797 }
 798
 799 static void v4l_print_event_subscription(const void *arg, bool write_only)
 800 {
 801         const struct v4l2_event_subscription *p = arg;
 802
 803         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 804                         p->type, p->id, p->flags);
 805 }
 806
 807 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 808 {
 809         const struct v4l2_sliced_vbi_cap *p = arg;
 810         int i;
 811
 812         pr_cont("type=%s, service_set=0x%08x\n",
 813                         prt_names(p->type, v4l2_type_names), p->service_set);
 814         for (i = 0; i < 24; i++)
 815                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 816                                 p->service_lines[0][i],
 817                                 p->service_lines[1][i]);
 818 }
 819
 820 static void v4l_print_freq_band(const void *arg, bool write_only)
 821 {
 822         const struct v4l2_frequency_band *p = arg;
 823
 824         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 825                         p->tuner, p->type, p->index,
 826                         p->capability, p->rangelow,
 827                         p->rangehigh, p->modulation);
 828 }
 829
 830 static void v4l_print_edid(const void *arg, bool write_only)
 831 {
 832         const struct v4l2_edid *p = arg;
 833
 834         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 835                 p->pad, p->start_block, p->blocks);
 836 }
 837
 838 static void v4l_print_u32(const void *arg, bool write_only)
 839 {
 840         pr_cont("value=%u\n", *(const u32 *)arg);
 841 }
 842
 843 static void v4l_print_newline(const void *arg, bool write_only)
 844 {
 845         pr_cont("\n");
 846 }
 847
 848 static void v4l_print_default(const void *arg, bool write_only)
 849 {
 850         pr_cont("driver-specific ioctl\n");
 851 }
 852
 853 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 854 {
 855         __u32 i;
 856
 857         /* zero the reserved fields */
 858         c->reserved[0] = c->reserved[1] = 0;
 859         for (i = 0; i < c->count; i++)
 860                 c->controls[i].reserved2[0] = 0;
 861
 862         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 863            when using extended controls.
 864            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 865            is it allowed for backwards compatibility.
 866          */
 867         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 868                 return 0;
 869         if (!c->which)
 870                 return 1;
 871         /* Check that all controls are from the same control class. */
 872         for (i = 0; i < c->count; i++) {
 873                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 874                         c->error_idx = i;
 875                         return 0;
 876                 }
 877         }
 878         return 1;
 879 }
 880
 881 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 882 {
 883         struct video_device *vfd = video_devdata(file);
 884         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 885         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 886         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 887         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 888         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 889         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 890         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 891
 892         if (ops == NULL)
 893                 return -EINVAL;
 894
 895         switch (type) {
 896         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 897                 if ((is_vid || is_tch) && is_rx &&
 898                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 899                         return 0;
 900                 break;
 901         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 902                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 903                         return 0;
 904                 break;
 905         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 906                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 907                         return 0;
 908                 break;
 909         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 910                 if (is_vid && is_tx &&
 911                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 912                         return 0;
 913                 break;
 914         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 915                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 916                         return 0;
 917                 break;
 918         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 919                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 920                         return 0;
 921                 break;
 922         case V4L2_BUF_TYPE_VBI_CAPTURE:
 923                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 924                         return 0;
 925                 break;
 926         case V4L2_BUF_TYPE_VBI_OUTPUT:
 927                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 928                         return 0;
 929                 break;
 930         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 931                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 932                         return 0;
 933                 break;
 934         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 935                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 936                         return 0;
 937                 break;
 938         case V4L2_BUF_TYPE_SDR_CAPTURE:
 939                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 940                         return 0;
 941                 break;
 942         case V4L2_BUF_TYPE_SDR_OUTPUT:
 943                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 944                         return 0;
 945                 break;
 946         default:
 947                 break;
 948         }
 949         return -EINVAL;
 950 }
 951
 952 static void v4l_sanitize_format(struct v4l2_format *fmt)
 953 {
 954         unsigned int offset;
 955
 956         /*
 957          * The v4l2_pix_format structure has been extended with fields that were
 958          * not previously required to be set to zero by applications. The priv
 959          * field, when set to a magic value, indicates the the extended fields
 960          * are valid. Otherwise they will contain undefined values. To simplify
 961          * the API towards drivers zero the extended fields and set the priv
 962          * field to the magic value when the extended pixel format structure
 963          * isn't used by applications.
 964          */
 965
 966         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 967             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 968                 return;
 969
 970         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
 971                 return;
 972
 973         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
 974
 975         offset = offsetof(struct v4l2_pix_format, priv)
 976                + sizeof(fmt->fmt.pix.priv);
 977         memset(((void *)&fmt->fmt.pix) + offset, 0,
 978                sizeof(fmt->fmt.pix) - offset);
 979 }
 980
 981 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 982                                 struct file *file, void *fh, void *arg)
 983 {
 984         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 985         struct video_device *vfd = video_devdata(file);
 986         int ret;
 987
 988         cap->version = LINUX_VERSION_CODE;
 989         cap->device_caps = vfd->device_caps;
 990         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
 991
 992         ret = ops->vidioc_querycap(file, fh, cap);
 993
 994         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
 995         /*
 996          * Drivers MUST fill in device_caps, so check for this and
 997          * warn if it was forgotten.
 998          */
 999         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1000                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1001                 cap->driver, cap->capabilities, cap->device_caps);
1002         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1003
1004         return ret;
1005 }
1006
1007 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1008                                 struct file *file, void *fh, void *arg)
1009 {
1010         struct video_device *vfd = video_devdata(file);
1011         int ret;
1012
1013         ret = v4l_enable_media_source(vfd);
1014         if (ret)
1015                 return ret;
1016         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1017 }
1018
1019 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1020                                 struct file *file, void *fh, void *arg)
1021 {
1022         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1023 }
1024
1025 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1026                                 struct file *file, void *fh, void *arg)
1027 {
1028         struct video_device *vfd;
1029         u32 *p = arg;
1030
1031         vfd = video_devdata(file);
1032         *p = v4l2_prio_max(vfd->prio);
1033         return 0;
1034 }
1035
1036 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1037                                 struct file *file, void *fh, void *arg)
1038 {
1039         struct video_device *vfd;
1040         struct v4l2_fh *vfh;
1041         u32 *p = arg;
1042
1043         vfd = video_devdata(file);
1044         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1045                 return -ENOTTY;
1046         vfh = file->private_data;
1047         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1048 }
1049
1050 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1051                                 struct file *file, void *fh, void *arg)
1052 {
1053         struct video_device *vfd = video_devdata(file);
1054         struct v4l2_input *p = arg;
1055
1056         /*
1057          * We set the flags for CAP_DV_TIMINGS &
1058          * CAP_STD here based on ioctl handler provided by the
1059          * driver. If the driver doesn't support these
1060          * for a specific input, it must override these flags.
1061          */
1062         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1063                 p->capabilities |= V4L2_IN_CAP_STD;
1064
1065         return ops->vidioc_enum_input(file, fh, p);
1066 }
1067
1068 static int v4l_enumoutput(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_output *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 output, it must override these flags.
1079          */
1080         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1081                 p->capabilities |= V4L2_OUT_CAP_STD;
1082
1083         return ops->vidioc_enum_output(file, fh, p);
1084 }
1085
1086 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1087 {
1088         const unsigned sz = sizeof(fmt->description);
1089         const char *descr = NULL;
1090         u32 flags = 0;
1091
1092         /*
1093          * We depart from the normal coding style here since the descriptions
1094          * should be aligned so it is easy to see which descriptions will be
1095          * longer than 31 characters (the max length for a description).
1096          * And frankly, this is easier to read anyway.
1097          *
1098          * Note that gcc will use O(log N) comparisons to find the right case.
1099          */
1100         switch (fmt->pixelformat) {
1101         /* Max description length mask: descr = "0123456789012345678901234567890" */
1102         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1103         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1104         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1105         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1106         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1107         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1108         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1109         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1110         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1111         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1112         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1113         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1114         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1115         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1116         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1117         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1118         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1119         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1120         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1121         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1122         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1123         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1124         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1125         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1126         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1127         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1128         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1129         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1130         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1131         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1132         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1133         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1134         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1135         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1136         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1137         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1138         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1139         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1140         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1141         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1142         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1143         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1144         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1145         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1146         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1147         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1148         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1149         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1150         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1151         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1152         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1153         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1154         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1155         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1156         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1157         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1158         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1159         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1160         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1161         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1162         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1163         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1164         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1165         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1166         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1167         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1168         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1169         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1170         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1171         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1172         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1173         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1174         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1175         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1176         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1177         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1178         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1179         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1180         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1181         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1182         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1183         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1184         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1185         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1186         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1187         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1188         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1189         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1190         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1191         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1192         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1193         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1194         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1195         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1196         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1197         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1198         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1199         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1200         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1201         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1202         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1203         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1204         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1205         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1206         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1207         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1208         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1209         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1210         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1211         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1212         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1213         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1214         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1215         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1216         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1217         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1218         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1219         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1220
1221         default:
1222                 /* Compressed formats */
1223                 flags = V4L2_FMT_FLAG_COMPRESSED;
1224                 switch (fmt->pixelformat) {
1225                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1226                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1227                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1228                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1229                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1230                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1231                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1232                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1233                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1234                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1235                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1236                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1237                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1238                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1239                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1240                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1241                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1242                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1243                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1244                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1245                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1246                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1247                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1248                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1249                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1250                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1251                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1252                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1253                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1254                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1255                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1256                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1257                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1258                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1259                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1260                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1261                 default:
1262                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1263                         if (fmt->description[0])
1264                                 return;
1265                         flags = 0;
1266                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1267                                         (char)(fmt->pixelformat & 0x7f),
1268                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1269                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1270                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1271                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1272                         break;
1273                 }
1274         }
1275
1276         if (descr)
1277                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1278         fmt->flags = flags;
1279 }
1280
1281 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1282                                 struct file *file, void *fh, void *arg)
1283 {
1284         struct v4l2_fmtdesc *p = arg;
1285         struct video_device *vfd = video_devdata(file);
1286         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1287         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1288         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1289         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1290         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1291         int ret = -EINVAL;
1292
1293         switch (p->type) {
1294         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1295                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
1296                         break;
1297                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1298                 break;
1299         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1300                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1301                         break;
1302                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1303                 break;
1304         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1305                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1306                         break;
1307                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1308                 break;
1309         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1310                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1311                         break;
1312                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1313                 break;
1314         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1315                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1316                         break;
1317                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1318                 break;
1319         case V4L2_BUF_TYPE_SDR_CAPTURE:
1320                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1321                         break;
1322                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1323                 break;
1324         case V4L2_BUF_TYPE_SDR_OUTPUT:
1325                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1326                         break;
1327                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1328                 break;
1329         }
1330         if (ret == 0)
1331                 v4l_fill_fmtdesc(p);
1332         return ret;
1333 }
1334
1335 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1336                                 struct file *file, void *fh, void *arg)
1337 {
1338         struct v4l2_format *p = arg;
1339         struct video_device *vfd = video_devdata(file);
1340         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1341         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1342         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1343         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1344         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1345         int ret;
1346
1347         /*
1348          * fmt can't be cleared for these overlay types due to the 'clips'
1349          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1350          * Those are provided by the user. So handle these two overlay types
1351          * first, and then just do a simple memset for the other types.
1352          */
1353         switch (p->type) {
1354         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1355         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1356                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1357                 u32 clipcount = p->fmt.win.clipcount;
1358                 void __user *bitmap = p->fmt.win.bitmap;
1359
1360                 memset(&p->fmt, 0, sizeof(p->fmt));
1361                 p->fmt.win.clips = clips;
1362                 p->fmt.win.clipcount = clipcount;
1363                 p->fmt.win.bitmap = bitmap;
1364                 break;
1365         }
1366         default:
1367                 memset(&p->fmt, 0, sizeof(p->fmt));
1368                 break;
1369         }
1370
1371         switch (p->type) {
1372         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1373                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
1374                         break;
1375                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1376                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1377                 /* just in case the driver zeroed it again */
1378                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1379                 return ret;
1380         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1381                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1382                         break;
1383                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1384         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1385                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1386                         break;
1387                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1388         case V4L2_BUF_TYPE_VBI_CAPTURE:
1389                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1390                         break;
1391                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1392         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1393                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1394                         break;
1395                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1396         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1397                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1398                         break;
1399                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1400                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1401                 /* just in case the driver zeroed it again */
1402                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1403                 return ret;
1404         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1405                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1406                         break;
1407                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1408         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1409                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1410                         break;
1411                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1412         case V4L2_BUF_TYPE_VBI_OUTPUT:
1413                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1414                         break;
1415                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1416         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1417                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1418                         break;
1419                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1420         case V4L2_BUF_TYPE_SDR_CAPTURE:
1421                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1422                         break;
1423                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1424         case V4L2_BUF_TYPE_SDR_OUTPUT:
1425                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1426                         break;
1427                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1428         }
1429         return -EINVAL;
1430 }
1431
1432 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1433 {
1434         /*
1435          * The v4l2_pix_format structure contains fields that make no sense for
1436          * touch. Set them to default values in this case.
1437          */
1438
1439         p->field = V4L2_FIELD_NONE;
1440         p->colorspace = V4L2_COLORSPACE_RAW;
1441         p->flags = 0;
1442         p->ycbcr_enc = 0;
1443         p->quantization = 0;
1444         p->xfer_func = 0;
1445 }
1446
1447 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1448                                 struct file *file, void *fh, void *arg)
1449 {
1450         struct v4l2_format *p = arg;
1451         struct video_device *vfd = video_devdata(file);
1452         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1453         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1454         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1455         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1456         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1457         int ret;
1458
1459         ret = v4l_enable_media_source(vfd);
1460         if (ret)
1461                 return ret;
1462         v4l_sanitize_format(p);
1463
1464         switch (p->type) {
1465         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1466                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
1467                         break;
1468                 CLEAR_AFTER_FIELD(p, fmt.pix);
1469                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1470                 /* just in case the driver zeroed it again */
1471                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1472                 if (is_tch)
1473                         v4l_pix_format_touch(&p->fmt.pix);
1474                 return ret;
1475         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1476                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1477                         break;
1478                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1479                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1480         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1481                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1482                         break;
1483                 CLEAR_AFTER_FIELD(p, fmt.win);
1484                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1485         case V4L2_BUF_TYPE_VBI_CAPTURE:
1486                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1487                         break;
1488                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1489                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1490         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1491                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1492                         break;
1493                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1494                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1495         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1496                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1497                         break;
1498                 CLEAR_AFTER_FIELD(p, fmt.pix);
1499                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1500                 /* just in case the driver zeroed it again */
1501                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1502                 return ret;
1503         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1504                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1505                         break;
1506                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1507                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1508         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1509                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1510                         break;
1511                 CLEAR_AFTER_FIELD(p, fmt.win);
1512                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1513         case V4L2_BUF_TYPE_VBI_OUTPUT:
1514                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1515                         break;
1516                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1517                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1518         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1519                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1520                         break;
1521                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1522                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1523         case V4L2_BUF_TYPE_SDR_CAPTURE:
1524                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1525                         break;
1526                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1527                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1528         case V4L2_BUF_TYPE_SDR_OUTPUT:
1529                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1530                         break;
1531                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1532                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1533         }
1534         return -EINVAL;
1535 }
1536
1537 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1538                                 struct file *file, void *fh, void *arg)
1539 {
1540         struct v4l2_format *p = arg;
1541         struct video_device *vfd = video_devdata(file);
1542         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1543         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1544         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1545         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1546         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1547         int ret;
1548
1549         v4l_sanitize_format(p);
1550
1551         switch (p->type) {
1552         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1553                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap))
1554                         break;
1555                 CLEAR_AFTER_FIELD(p, fmt.pix);
1556                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1557                 /* just in case the driver zeroed it again */
1558                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1559                 return ret;
1560         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1561                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1562                         break;
1563                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1564                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1565         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1566                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1567                         break;
1568                 CLEAR_AFTER_FIELD(p, fmt.win);
1569                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1570         case V4L2_BUF_TYPE_VBI_CAPTURE:
1571                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1572                         break;
1573                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1574                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1575         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1576                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1577                         break;
1578                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1579                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1580         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1581                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1582                         break;
1583                 CLEAR_AFTER_FIELD(p, fmt.pix);
1584                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1585                 /* just in case the driver zeroed it again */
1586                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1587                 return ret;
1588         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1589                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1590                         break;
1591                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1592                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1593         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1594                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1595                         break;
1596                 CLEAR_AFTER_FIELD(p, fmt.win);
1597                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1598         case V4L2_BUF_TYPE_VBI_OUTPUT:
1599                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1600                         break;
1601                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1602                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1603         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1604                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1605                         break;
1606                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1607                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1608         case V4L2_BUF_TYPE_SDR_CAPTURE:
1609                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1610                         break;
1611                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1612                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1613         case V4L2_BUF_TYPE_SDR_OUTPUT:
1614                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1615                         break;
1616                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1617                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1618         }
1619         return -EINVAL;
1620 }
1621
1622 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1623                                 struct file *file, void *fh, void *arg)
1624 {
1625         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1626 }
1627
1628 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1629                                 struct file *file, void *fh, void *arg)
1630 {
1631         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1632 }
1633
1634 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1635                                 struct file *file, void *fh, void *arg)
1636 {
1637         struct video_device *vfd = video_devdata(file);
1638         struct v4l2_tuner *p = arg;
1639         int err;
1640
1641         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1642                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1643         err = ops->vidioc_g_tuner(file, fh, p);
1644         if (!err)
1645                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1646         return err;
1647 }
1648
1649 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1650                                 struct file *file, void *fh, void *arg)
1651 {
1652         struct video_device *vfd = video_devdata(file);
1653         struct v4l2_tuner *p = arg;
1654         int ret;
1655
1656         ret = v4l_enable_media_source(vfd);
1657         if (ret)
1658                 return ret;
1659         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1660                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1661         return ops->vidioc_s_tuner(file, fh, p);
1662 }
1663
1664 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1665                                 struct file *file, void *fh, void *arg)
1666 {
1667         struct video_device *vfd = video_devdata(file);
1668         struct v4l2_modulator *p = arg;
1669         int err;
1670
1671         if (vfd->vfl_type == VFL_TYPE_RADIO)
1672                 p->type = V4L2_TUNER_RADIO;
1673
1674         err = ops->vidioc_g_modulator(file, fh, p);
1675         if (!err)
1676                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1677         return err;
1678 }
1679
1680 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1681                                 struct file *file, void *fh, void *arg)
1682 {
1683         struct video_device *vfd = video_devdata(file);
1684         struct v4l2_modulator *p = arg;
1685
1686         if (vfd->vfl_type == VFL_TYPE_RADIO)
1687                 p->type = V4L2_TUNER_RADIO;
1688
1689         return ops->vidioc_s_modulator(file, fh, p);
1690 }
1691
1692 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1693                                 struct file *file, void *fh, void *arg)
1694 {
1695         struct video_device *vfd = video_devdata(file);
1696         struct v4l2_frequency *p = arg;
1697
1698         if (vfd->vfl_type == VFL_TYPE_SDR)
1699                 p->type = V4L2_TUNER_SDR;
1700         else
1701                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1702                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1703         return ops->vidioc_g_frequency(file, fh, p);
1704 }
1705
1706 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1707                                 struct file *file, void *fh, void *arg)
1708 {
1709         struct video_device *vfd = video_devdata(file);
1710         const struct v4l2_frequency *p = arg;
1711         enum v4l2_tuner_type type;
1712         int ret;
1713
1714         ret = v4l_enable_media_source(vfd);
1715         if (ret)
1716                 return ret;
1717         if (vfd->vfl_type == VFL_TYPE_SDR) {
1718                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1719                         return -EINVAL;
1720         } else {
1721                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1722                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1723                 if (type != p->type)
1724                         return -EINVAL;
1725         }
1726         return ops->vidioc_s_frequency(file, fh, p);
1727 }
1728
1729 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1730                                 struct file *file, void *fh, void *arg)
1731 {
1732         struct video_device *vfd = video_devdata(file);
1733         struct v4l2_standard *p = arg;
1734         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1735         unsigned int index = p->index, i, j = 0;
1736         const char *descr = "";
1737
1738         /* Return -ENODATA if the tvnorms for the current input
1739            or output is 0, meaning that it doesn't support this API. */
1740         if (id == 0)
1741                 return -ENODATA;
1742
1743         /* Return norm array in a canonical way */
1744         for (i = 0; i <= index && id; i++) {
1745                 /* last std value in the standards array is 0, so this
1746                    while always ends there since (id & 0) == 0. */
1747                 while ((id & standards[j].std) != standards[j].std)
1748                         j++;
1749                 curr_id = standards[j].std;
1750                 descr = standards[j].descr;
1751                 j++;
1752                 if (curr_id == 0)
1753                         break;
1754                 if (curr_id != V4L2_STD_PAL &&
1755                                 curr_id != V4L2_STD_SECAM &&
1756                                 curr_id != V4L2_STD_NTSC)
1757                         id &= ~curr_id;
1758         }
1759         if (i <= index)
1760                 return -EINVAL;
1761
1762         v4l2_video_std_construct(p, curr_id, descr);
1763         return 0;
1764 }
1765
1766 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1767                                 struct file *file, void *fh, void *arg)
1768 {
1769         struct video_device *vfd = video_devdata(file);
1770         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1771         int ret;
1772
1773         ret = v4l_enable_media_source(vfd);
1774         if (ret)
1775                 return ret;
1776         norm = id & vfd->tvnorms;
1777         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1778                 return -EINVAL;
1779
1780         /* Calls the specific handler */
1781         return ops->vidioc_s_std(file, fh, norm);
1782 }
1783
1784 static int v4l_querystd(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 *p = arg;
1789         int ret;
1790
1791         ret = v4l_enable_media_source(vfd);
1792         if (ret)
1793                 return ret;
1794         /*
1795          * If no signal is detected, then the driver should return
1796          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1797          * any standards that do not apply removed.
1798          *
1799          * This means that tuners, audio and video decoders can join
1800          * their efforts to improve the standards detection.
1801          */
1802         *p = vfd->tvnorms;
1803         return ops->vidioc_querystd(file, fh, arg);
1804 }
1805
1806 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1807                                 struct file *file, void *fh, void *arg)
1808 {
1809         struct video_device *vfd = video_devdata(file);
1810         struct v4l2_hw_freq_seek *p = arg;
1811         enum v4l2_tuner_type type;
1812         int ret;
1813
1814         ret = v4l_enable_media_source(vfd);
1815         if (ret)
1816                 return ret;
1817         /* s_hw_freq_seek is not supported for SDR for now */
1818         if (vfd->vfl_type == VFL_TYPE_SDR)
1819                 return -EINVAL;
1820
1821         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1822                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1823         if (p->type != type)
1824                 return -EINVAL;
1825         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1826 }
1827
1828 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1829                                 struct file *file, void *fh, void *arg)
1830 {
1831         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1832 }
1833
1834 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1835                                 struct file *file, void *fh, void *arg)
1836 {
1837         struct v4l2_requestbuffers *p = arg;
1838         int ret = check_fmt(file, p->type);
1839
1840         if (ret)
1841                 return ret;
1842
1843         CLEAR_AFTER_FIELD(p, memory);
1844
1845         return ops->vidioc_reqbufs(file, fh, p);
1846 }
1847
1848 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1849                                 struct file *file, void *fh, void *arg)
1850 {
1851         struct v4l2_buffer *p = arg;
1852         int ret = check_fmt(file, p->type);
1853
1854         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1855 }
1856
1857 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1858                                 struct file *file, void *fh, void *arg)
1859 {
1860         struct v4l2_buffer *p = arg;
1861         int ret = check_fmt(file, p->type);
1862
1863         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1864 }
1865
1866 static int v4l_dqbuf(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_dqbuf(file, fh, p);
1873 }
1874
1875 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1876                                 struct file *file, void *fh, void *arg)
1877 {
1878         struct v4l2_create_buffers *create = arg;
1879         int ret = check_fmt(file, create->format.type);
1880
1881         if (ret)
1882                 return ret;
1883
1884         CLEAR_AFTER_FIELD(create, format);
1885
1886         v4l_sanitize_format(&create->format);
1887
1888         ret = ops->vidioc_create_bufs(file, fh, create);
1889
1890         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1891             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1892                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1893
1894         return ret;
1895 }
1896
1897 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1898                                 struct file *file, void *fh, void *arg)
1899 {
1900         struct v4l2_buffer *b = arg;
1901         int ret = check_fmt(file, b->type);
1902
1903         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1904 }
1905
1906 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1907                                 struct file *file, void *fh, void *arg)
1908 {
1909         struct v4l2_streamparm *p = arg;
1910         v4l2_std_id std;
1911         int ret = check_fmt(file, p->type);
1912
1913         if (ret)
1914                 return ret;
1915         if (ops->vidioc_g_parm)
1916                 return ops->vidioc_g_parm(file, fh, p);
1917         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1918             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1919                 return -EINVAL;
1920         p->parm.capture.readbuffers = 2;
1921         ret = ops->vidioc_g_std(file, fh, &std);
1922         if (ret == 0)
1923                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1924         return ret;
1925 }
1926
1927 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1928                                 struct file *file, void *fh, void *arg)
1929 {
1930         struct v4l2_streamparm *p = arg;
1931         int ret = check_fmt(file, p->type);
1932
1933         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1934 }
1935
1936 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1937                                 struct file *file, void *fh, void *arg)
1938 {
1939         struct video_device *vfd = video_devdata(file);
1940         struct v4l2_queryctrl *p = arg;
1941         struct v4l2_fh *vfh =
1942                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1943
1944         if (vfh && vfh->ctrl_handler)
1945                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1946         if (vfd->ctrl_handler)
1947                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1948         if (ops->vidioc_queryctrl)
1949                 return ops->vidioc_queryctrl(file, fh, p);
1950         return -ENOTTY;
1951 }
1952
1953 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1954                                 struct file *file, void *fh, void *arg)
1955 {
1956         struct video_device *vfd = video_devdata(file);
1957         struct v4l2_query_ext_ctrl *p = arg;
1958         struct v4l2_fh *vfh =
1959                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1960
1961         if (vfh && vfh->ctrl_handler)
1962                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1963         if (vfd->ctrl_handler)
1964                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1965         if (ops->vidioc_query_ext_ctrl)
1966                 return ops->vidioc_query_ext_ctrl(file, fh, p);
1967         return -ENOTTY;
1968 }
1969
1970 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1971                                 struct file *file, void *fh, void *arg)
1972 {
1973         struct video_device *vfd = video_devdata(file);
1974         struct v4l2_querymenu *p = arg;
1975         struct v4l2_fh *vfh =
1976                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1977
1978         if (vfh && vfh->ctrl_handler)
1979                 return v4l2_querymenu(vfh->ctrl_handler, p);
1980         if (vfd->ctrl_handler)
1981                 return v4l2_querymenu(vfd->ctrl_handler, p);
1982         if (ops->vidioc_querymenu)
1983                 return ops->vidioc_querymenu(file, fh, p);
1984         return -ENOTTY;
1985 }
1986
1987 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1988                                 struct file *file, void *fh, void *arg)
1989 {
1990         struct video_device *vfd = video_devdata(file);
1991         struct v4l2_control *p = arg;
1992         struct v4l2_fh *vfh =
1993                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1994         struct v4l2_ext_controls ctrls;
1995         struct v4l2_ext_control ctrl;
1996
1997         if (vfh && vfh->ctrl_handler)
1998                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1999         if (vfd->ctrl_handler)
2000                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2001         if (ops->vidioc_g_ctrl)
2002                 return ops->vidioc_g_ctrl(file, fh, p);
2003         if (ops->vidioc_g_ext_ctrls == NULL)
2004                 return -ENOTTY;
2005
2006         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2007         ctrls.count = 1;
2008         ctrls.controls = &ctrl;
2009         ctrl.id = p->id;
2010         ctrl.value = p->value;
2011         if (check_ext_ctrls(&ctrls, 1)) {
2012                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2013
2014                 if (ret == 0)
2015                         p->value = ctrl.value;
2016                 return ret;
2017         }
2018         return -EINVAL;
2019 }
2020
2021 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2022                                 struct file *file, void *fh, void *arg)
2023 {
2024         struct video_device *vfd = video_devdata(file);
2025         struct v4l2_control *p = arg;
2026         struct v4l2_fh *vfh =
2027                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2028         struct v4l2_ext_controls ctrls;
2029         struct v4l2_ext_control ctrl;
2030
2031         if (vfh && vfh->ctrl_handler)
2032                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2033         if (vfd->ctrl_handler)
2034                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2035         if (ops->vidioc_s_ctrl)
2036                 return ops->vidioc_s_ctrl(file, fh, p);
2037         if (ops->vidioc_s_ext_ctrls == NULL)
2038                 return -ENOTTY;
2039
2040         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2041         ctrls.count = 1;
2042         ctrls.controls = &ctrl;
2043         ctrl.id = p->id;
2044         ctrl.value = p->value;
2045         if (check_ext_ctrls(&ctrls, 1))
2046                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2047         return -EINVAL;
2048 }
2049
2050 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2051                                 struct file *file, void *fh, void *arg)
2052 {
2053         struct video_device *vfd = video_devdata(file);
2054         struct v4l2_ext_controls *p = arg;
2055         struct v4l2_fh *vfh =
2056                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2057
2058         p->error_idx = p->count;
2059         if (vfh && vfh->ctrl_handler)
2060                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2061         if (vfd->ctrl_handler)
2062                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2063         if (ops->vidioc_g_ext_ctrls == NULL)
2064                 return -ENOTTY;
2065         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2066                                         -EINVAL;
2067 }
2068
2069 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2070                                 struct file *file, void *fh, void *arg)
2071 {
2072         struct video_device *vfd = video_devdata(file);
2073         struct v4l2_ext_controls *p = arg;
2074         struct v4l2_fh *vfh =
2075                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2076
2077         p->error_idx = p->count;
2078         if (vfh && vfh->ctrl_handler)
2079                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2080         if (vfd->ctrl_handler)
2081                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2082         if (ops->vidioc_s_ext_ctrls == NULL)
2083                 return -ENOTTY;
2084         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2085                                         -EINVAL;
2086 }
2087
2088 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2089                                 struct file *file, void *fh, void *arg)
2090 {
2091         struct video_device *vfd = video_devdata(file);
2092         struct v4l2_ext_controls *p = arg;
2093         struct v4l2_fh *vfh =
2094                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2095
2096         p->error_idx = p->count;
2097         if (vfh && vfh->ctrl_handler)
2098                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2099         if (vfd->ctrl_handler)
2100                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2101         if (ops->vidioc_try_ext_ctrls == NULL)
2102                 return -ENOTTY;
2103         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2104                                         -EINVAL;
2105 }
2106
2107 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2108                                 struct file *file, void *fh, void *arg)
2109 {
2110         struct v4l2_crop *p = arg;
2111         struct v4l2_selection s = {
2112                 .type = p->type,
2113         };
2114         int ret;
2115
2116         if (ops->vidioc_g_crop)
2117                 return ops->vidioc_g_crop(file, fh, p);
2118         /* simulate capture crop using selection api */
2119
2120         /* crop means compose for output devices */
2121         if (V4L2_TYPE_IS_OUTPUT(p->type))
2122                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2123         else
2124                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2125
2126         ret = ops->vidioc_g_selection(file, fh, &s);
2127
2128         /* copying results to old structure on success */
2129         if (!ret)
2130                 p->c = s.r;
2131         return ret;
2132 }
2133
2134 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2135                                 struct file *file, void *fh, void *arg)
2136 {
2137         struct v4l2_crop *p = arg;
2138         struct v4l2_selection s = {
2139                 .type = p->type,
2140                 .r = p->c,
2141         };
2142
2143         if (ops->vidioc_s_crop)
2144                 return ops->vidioc_s_crop(file, fh, p);
2145         /* simulate capture crop using selection api */
2146
2147         /* crop means compose for output devices */
2148         if (V4L2_TYPE_IS_OUTPUT(p->type))
2149                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2150         else
2151                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2152
2153         return ops->vidioc_s_selection(file, fh, &s);
2154 }
2155
2156 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2157                                 struct file *file, void *fh, void *arg)
2158 {
2159         struct v4l2_cropcap *p = arg;
2160         struct v4l2_selection s = { .type = p->type };
2161         int ret = 0;
2162
2163         /* setting trivial pixelaspect */
2164         p->pixelaspect.numerator = 1;
2165         p->pixelaspect.denominator = 1;
2166
2167         /*
2168          * The determine_valid_ioctls() call already should ensure
2169          * that this can never happen, but just in case...
2170          */
2171         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2172                 return -ENOTTY;
2173
2174         if (ops->vidioc_cropcap)
2175                 ret = ops->vidioc_cropcap(file, fh, p);
2176
2177         if (!ops->vidioc_g_selection)
2178                 return ret;
2179
2180         /*
2181          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2182          * square pixel aspect ratio in that case.
2183          */
2184         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2185                 return ret;
2186
2187         /* Use g_selection() to fill in the bounds and defrect rectangles */
2188
2189         /* obtaining bounds */
2190         if (V4L2_TYPE_IS_OUTPUT(p->type))
2191                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2192         else
2193                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2194
2195         ret = ops->vidioc_g_selection(file, fh, &s);
2196         if (ret)
2197                 return ret;
2198         p->bounds = s.r;
2199
2200         /* obtaining defrect */
2201         if (V4L2_TYPE_IS_OUTPUT(p->type))
2202                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2203         else
2204                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2205
2206         ret = ops->vidioc_g_selection(file, fh, &s);
2207         if (ret)
2208                 return ret;
2209         p->defrect = s.r;
2210
2211         return 0;
2212 }
2213
2214 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2215                                 struct file *file, void *fh, void *arg)
2216 {
2217         struct video_device *vfd = video_devdata(file);
2218         int ret;
2219
2220         if (vfd->v4l2_dev)
2221                 pr_info("%s: =================  START STATUS  =================\n",
2222                         vfd->v4l2_dev->name);
2223         ret = ops->vidioc_log_status(file, fh);
2224         if (vfd->v4l2_dev)
2225                 pr_info("%s: ==================  END STATUS  ==================\n",
2226                         vfd->v4l2_dev->name);
2227         return ret;
2228 }
2229
2230 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2231                                 struct file *file, void *fh, void *arg)
2232 {
2233 #ifdef CONFIG_VIDEO_ADV_DEBUG
2234         struct v4l2_dbg_register *p = arg;
2235         struct video_device *vfd = video_devdata(file);
2236         struct v4l2_subdev *sd;
2237         int idx = 0;
2238
2239         if (!capable(CAP_SYS_ADMIN))
2240                 return -EPERM;
2241         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2242                 if (vfd->v4l2_dev == NULL)
2243                         return -EINVAL;
2244                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2245                         if (p->match.addr == idx++)
2246                                 return v4l2_subdev_call(sd, core, g_register, p);
2247                 return -EINVAL;
2248         }
2249         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2250             (ops->vidioc_g_chip_info || p->match.addr == 0))
2251                 return ops->vidioc_g_register(file, fh, p);
2252         return -EINVAL;
2253 #else
2254         return -ENOTTY;
2255 #endif
2256 }
2257
2258 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2259                                 struct file *file, void *fh, void *arg)
2260 {
2261 #ifdef CONFIG_VIDEO_ADV_DEBUG
2262         const struct v4l2_dbg_register *p = arg;
2263         struct video_device *vfd = video_devdata(file);
2264         struct v4l2_subdev *sd;
2265         int idx = 0;
2266
2267         if (!capable(CAP_SYS_ADMIN))
2268                 return -EPERM;
2269         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2270                 if (vfd->v4l2_dev == NULL)
2271                         return -EINVAL;
2272                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2273                         if (p->match.addr == idx++)
2274                                 return v4l2_subdev_call(sd, core, s_register, p);
2275                 return -EINVAL;
2276         }
2277         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2278             (ops->vidioc_g_chip_info || p->match.addr == 0))
2279                 return ops->vidioc_s_register(file, fh, p);
2280         return -EINVAL;
2281 #else
2282         return -ENOTTY;
2283 #endif
2284 }
2285
2286 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2287                                 struct file *file, void *fh, void *arg)
2288 {
2289 #ifdef CONFIG_VIDEO_ADV_DEBUG
2290         struct video_device *vfd = video_devdata(file);
2291         struct v4l2_dbg_chip_info *p = arg;
2292         struct v4l2_subdev *sd;
2293         int idx = 0;
2294
2295         switch (p->match.type) {
2296         case V4L2_CHIP_MATCH_BRIDGE:
2297                 if (ops->vidioc_s_register)
2298                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2299                 if (ops->vidioc_g_register)
2300                         p->flags |= V4L2_CHIP_FL_READABLE;
2301                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2302                 if (ops->vidioc_g_chip_info)
2303                         return ops->vidioc_g_chip_info(file, fh, arg);
2304                 if (p->match.addr)
2305                         return -EINVAL;
2306                 return 0;
2307
2308         case V4L2_CHIP_MATCH_SUBDEV:
2309                 if (vfd->v4l2_dev == NULL)
2310                         break;
2311                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2312                         if (p->match.addr != idx++)
2313                                 continue;
2314                         if (sd->ops->core && sd->ops->core->s_register)
2315                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2316                         if (sd->ops->core && sd->ops->core->g_register)
2317                                 p->flags |= V4L2_CHIP_FL_READABLE;
2318                         strlcpy(p->name, sd->name, sizeof(p->name));
2319                         return 0;
2320                 }
2321                 break;
2322         }
2323         return -EINVAL;
2324 #else
2325         return -ENOTTY;
2326 #endif
2327 }
2328
2329 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2330                                 struct file *file, void *fh, void *arg)
2331 {
2332         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2333 }
2334
2335 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2336                                 struct file *file, void *fh, void *arg)
2337 {
2338         return ops->vidioc_subscribe_event(fh, arg);
2339 }
2340
2341 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2342                                 struct file *file, void *fh, void *arg)
2343 {
2344         return ops->vidioc_unsubscribe_event(fh, arg);
2345 }
2346
2347 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2348                                 struct file *file, void *fh, void *arg)
2349 {
2350         struct v4l2_sliced_vbi_cap *p = arg;
2351         int ret = check_fmt(file, p->type);
2352
2353         if (ret)
2354                 return ret;
2355
2356         /* Clear up to type, everything after type is zeroed already */
2357         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2358
2359         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2360 }
2361
2362 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2363                                 struct file *file, void *fh, void *arg)
2364 {
2365         struct video_device *vfd = video_devdata(file);
2366         struct v4l2_frequency_band *p = arg;
2367         enum v4l2_tuner_type type;
2368         int err;
2369
2370         if (vfd->vfl_type == VFL_TYPE_SDR) {
2371                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2372                         return -EINVAL;
2373                 type = p->type;
2374         } else {
2375                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2376                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2377                 if (type != p->type)
2378                         return -EINVAL;
2379         }
2380         if (ops->vidioc_enum_freq_bands) {
2381                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2382                 if (err != -ENOTTY)
2383                         return err;
2384         }
2385         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2386                 struct v4l2_tuner t = {
2387                         .index = p->tuner,
2388                         .type = type,
2389                 };
2390
2391                 if (p->index)
2392                         return -EINVAL;
2393                 err = ops->vidioc_g_tuner(file, fh, &t);
2394                 if (err)
2395                         return err;
2396                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2397                 p->rangelow = t.rangelow;
2398                 p->rangehigh = t.rangehigh;
2399                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2400                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2401                 return 0;
2402         }
2403         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2404                 struct v4l2_modulator m = {
2405                         .index = p->tuner,
2406                 };
2407
2408                 if (type != V4L2_TUNER_RADIO)
2409                         return -EINVAL;
2410                 if (p->index)
2411                         return -EINVAL;
2412                 err = ops->vidioc_g_modulator(file, fh, &m);
2413                 if (err)
2414                         return err;
2415                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2416                 p->rangelow = m.rangelow;
2417                 p->rangehigh = m.rangehigh;
2418                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2419                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2420                 return 0;
2421         }
2422         return -ENOTTY;
2423 }
2424
2425 struct v4l2_ioctl_info {
2426         unsigned int ioctl;
2427         u32 flags;
2428         const char * const name;
2429         union {
2430                 u32 offset;
2431                 int (*func)(const struct v4l2_ioctl_ops *ops,
2432                                 struct file *file, void *fh, void *p);
2433         } u;
2434         void (*debug)(const void *arg, bool write_only);
2435 };
2436
2437 /* This control needs a priority check */
2438 #define INFO_FL_PRIO    (1 << 0)
2439 /* This control can be valid if the filehandle passes a control handler. */
2440 #define INFO_FL_CTRL    (1 << 1)
2441 /* This is a standard ioctl, no need for special code */
2442 #define INFO_FL_STD     (1 << 2)
2443 /* This is ioctl has its own function */
2444 #define INFO_FL_FUNC    (1 << 3)
2445 /* Queuing ioctl */
2446 #define INFO_FL_QUEUE   (1 << 4)
2447 /* Zero struct from after the field to the end */
2448 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2449         ((offsetof(struct v4l2_struct, field) +                 \
2450           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2451 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2452
2453 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2454         [_IOC_NR(_ioctl)] = {                                           \
2455                 .ioctl = _ioctl,                                        \
2456                 .flags = _flags | INFO_FL_STD,                          \
2457                 .name = #_ioctl,                                        \
2458                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2459                 .debug = _debug,                                        \
2460         }
2461
2462 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2463         [_IOC_NR(_ioctl)] = {                                           \
2464                 .ioctl = _ioctl,                                        \
2465                 .flags = _flags | INFO_FL_FUNC,                         \
2466                 .name = #_ioctl,                                        \
2467                 .u.func = _func,                                        \
2468                 .debug = _debug,                                        \
2469         }
2470
2471 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2472         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2473         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2474         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2475         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2476         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2477         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2478         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2479         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2480         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2481         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2482         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2483         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2484         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2485         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2486         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2487         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2488         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2489         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2490         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2491         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2492         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2493         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2494         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2495         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2496         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2497         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2498         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2499         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2500         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2501         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2502         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2503         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2504         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2505         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2506         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2507         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2508         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2509         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2510         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2511         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2512         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2513         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2514         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2515         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2516         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2517         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2518         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2519         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2520         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2521         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2522         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2523         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2524         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2525         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2526         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)),
2527         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2528         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2529         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2530         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2531         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2532         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2533         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2534         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2535         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2536         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2537         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2538         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2539         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2540         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2541         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)),
2542         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2543         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2544         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2545         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2546         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2547         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2548         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2549         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2550         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2551         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2552         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)),
2553         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)),
2554 };
2555 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2556
2557 bool v4l2_is_known_ioctl(unsigned int cmd)
2558 {
2559         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2560                 return false;
2561         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2562 }
2563
2564 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2565 {
2566         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2567                 return vdev->lock;
2568         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2569                 return NULL;
2570         if (vdev->queue && vdev->queue->lock &&
2571                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2572                 return vdev->queue->lock;
2573         return vdev->lock;
2574 }
2575
2576 /* Common ioctl debug function. This function can be used by
2577    external ioctl messages as well as internal V4L ioctl */
2578 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2579 {
2580         const char *dir, *type;
2581
2582         if (prefix)
2583                 printk(KERN_DEBUG "%s: ", prefix);
2584
2585         switch (_IOC_TYPE(cmd)) {
2586         case 'd':
2587                 type = "v4l2_int";
2588                 break;
2589         case 'V':
2590                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2591                         type = "v4l2";
2592                         break;
2593                 }
2594                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2595                 return;
2596         default:
2597                 type = "unknown";
2598                 break;
2599         }
2600
2601         switch (_IOC_DIR(cmd)) {
2602         case _IOC_NONE:              dir = "--"; break;
2603         case _IOC_READ:              dir = "r-"; break;
2604         case _IOC_WRITE:             dir = "-w"; break;
2605         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2606         default:                     dir = "*ERR*"; break;
2607         }
2608         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2609                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2610 }
2611 EXPORT_SYMBOL(v4l_printk_ioctl);
2612
2613 static long __video_do_ioctl(struct file *file,
2614                 unsigned int cmd, void *arg)
2615 {
2616         struct video_device *vfd = video_devdata(file);
2617         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2618         bool write_only = false;
2619         struct v4l2_ioctl_info default_info;
2620         const struct v4l2_ioctl_info *info;
2621         void *fh = file->private_data;
2622         struct v4l2_fh *vfh = NULL;
2623         int dev_debug = vfd->dev_debug;
2624         long ret = -ENOTTY;
2625
2626         if (ops == NULL) {
2627                 pr_warn("%s: has no ioctl_ops.\n",
2628                                 video_device_node_name(vfd));
2629                 return ret;
2630         }
2631
2632         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2633                 vfh = file->private_data;
2634
2635         if (v4l2_is_known_ioctl(cmd)) {
2636                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2637
2638                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2639                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2640                         goto done;
2641
2642                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2643                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2644                         if (ret)
2645                                 goto done;
2646                 }
2647         } else {
2648                 default_info.ioctl = cmd;
2649                 default_info.flags = 0;
2650                 default_info.debug = v4l_print_default;
2651                 info = &default_info;
2652         }
2653
2654         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2655         if (info->flags & INFO_FL_STD) {
2656                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2657                 const void *p = vfd->ioctl_ops;
2658                 const vidioc_op *vidioc = p + info->u.offset;
2659
2660                 ret = (*vidioc)(file, fh, arg);
2661         } else if (info->flags & INFO_FL_FUNC) {
2662                 ret = info->u.func(ops, file, fh, arg);
2663         } else if (!ops->vidioc_default) {
2664                 ret = -ENOTTY;
2665         } else {
2666                 ret = ops->vidioc_default(file, fh,
2667                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2668                         cmd, arg);
2669         }
2670
2671 done:
2672         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2673                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2674                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2675                         return ret;
2676
2677                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2678                 if (ret < 0)
2679                         pr_cont(": error %ld", ret);
2680                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2681                         pr_cont("\n");
2682                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2683                         info->debug(arg, write_only);
2684                 else {
2685                         pr_cont(": ");
2686                         info->debug(arg, write_only);
2687                 }
2688         }
2689
2690         return ret;
2691 }
2692
2693 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2694                             void __user **user_ptr, void ***kernel_ptr)
2695 {
2696         int ret = 0;
2697
2698         switch (cmd) {
2699         case VIDIOC_PREPARE_BUF:
2700         case VIDIOC_QUERYBUF:
2701         case VIDIOC_QBUF:
2702         case VIDIOC_DQBUF: {
2703                 struct v4l2_buffer *buf = parg;
2704
2705                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2706                         if (buf->length > VIDEO_MAX_PLANES) {
2707                                 ret = -EINVAL;
2708                                 break;
2709                         }
2710                         *user_ptr = (void __user *)buf->m.planes;
2711                         *kernel_ptr = (void **)&buf->m.planes;
2712                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2713                         ret = 1;
2714                 }
2715                 break;
2716         }
2717
2718         case VIDIOC_G_EDID:
2719         case VIDIOC_S_EDID: {
2720                 struct v4l2_edid *edid = parg;
2721
2722                 if (edid->blocks) {
2723                         if (edid->blocks > 256) {
2724                                 ret = -EINVAL;
2725                                 break;
2726                         }
2727                         *user_ptr = (void __user *)edid->edid;
2728                         *kernel_ptr = (void **)&edid->edid;
2729                         *array_size = edid->blocks * 128;
2730                         ret = 1;
2731                 }
2732                 break;
2733         }
2734
2735         case VIDIOC_S_EXT_CTRLS:
2736         case VIDIOC_G_EXT_CTRLS:
2737         case VIDIOC_TRY_EXT_CTRLS: {
2738                 struct v4l2_ext_controls *ctrls = parg;
2739
2740                 if (ctrls->count != 0) {
2741                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2742                                 ret = -EINVAL;
2743                                 break;
2744                         }
2745                         *user_ptr = (void __user *)ctrls->controls;
2746                         *kernel_ptr = (void **)&ctrls->controls;
2747                         *array_size = sizeof(struct v4l2_ext_control)
2748                                     * ctrls->count;
2749                         ret = 1;
2750                 }
2751                 break;
2752         }
2753         }
2754
2755         return ret;
2756 }
2757
2758 long
2759 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2760                v4l2_kioctl func)
2761 {
2762         char    sbuf[128];
2763         void    *mbuf = NULL;
2764         void    *parg = (void *)arg;
2765         long    err  = -EINVAL;
2766         bool    has_array_args;
2767         size_t  array_size = 0;
2768         void __user *user_ptr = NULL;
2769         void    **kernel_ptr = NULL;
2770
2771         /*  Copy arguments into temp kernel buffer  */
2772         if (_IOC_DIR(cmd) != _IOC_NONE) {
2773                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2774                         parg = sbuf;
2775                 } else {
2776                         /* too big to allocate from stack */
2777                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2778                         if (NULL == mbuf)
2779                                 return -ENOMEM;
2780                         parg = mbuf;
2781                 }
2782
2783                 err = -EFAULT;
2784                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2785                         unsigned int n = _IOC_SIZE(cmd);
2786
2787                         /*
2788                          * In some cases, only a few fields are used as input,
2789                          * i.e. when the app sets "index" and then the driver
2790                          * fills in the rest of the structure for the thing
2791                          * with that index.  We only need to copy up the first
2792                          * non-input field.
2793                          */
2794                         if (v4l2_is_known_ioctl(cmd)) {
2795                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2796                                 if (flags & INFO_FL_CLEAR_MASK)
2797                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2798                         }
2799
2800                         if (copy_from_user(parg, (void __user *)arg, n))
2801                                 goto out;
2802
2803                         /* zero out anything we don't copy from userspace */
2804                         if (n < _IOC_SIZE(cmd))
2805                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2806                 } else {
2807                         /* read-only ioctl */
2808                         memset(parg, 0, _IOC_SIZE(cmd));
2809                 }
2810         }
2811
2812         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2813         if (err < 0)
2814                 goto out;
2815         has_array_args = err;
2816
2817         if (has_array_args) {
2818                 /*
2819                  * When adding new types of array args, make sure that the
2820                  * parent argument to ioctl (which contains the pointer to the
2821                  * array) fits into sbuf (so that mbuf will still remain
2822                  * unused up to here).
2823                  */
2824                 mbuf = kmalloc(array_size, GFP_KERNEL);
2825                 err = -ENOMEM;
2826                 if (NULL == mbuf)
2827                         goto out_array_args;
2828                 err = -EFAULT;
2829                 if (copy_from_user(mbuf, user_ptr, array_size))
2830                         goto out_array_args;
2831                 *kernel_ptr = mbuf;
2832         }
2833
2834         /* Handles IOCTL */
2835         err = func(file, cmd, parg);
2836         if (err == -ENOIOCTLCMD)
2837                 err = -ENOTTY;
2838         if (err == 0) {
2839                 if (cmd == VIDIOC_DQBUF)
2840                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2841                 else if (cmd == VIDIOC_QBUF)
2842                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2843         }
2844
2845         if (has_array_args) {
2846                 *kernel_ptr = (void __force *)user_ptr;
2847                 if (copy_to_user(user_ptr, mbuf, array_size))
2848                         err = -EFAULT;
2849                 goto out_array_args;
2850         }
2851         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2852            results that must be returned. */
2853         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2854                 goto out;
2855
2856 out_array_args:
2857         /*  Copy results into user buffer  */
2858         switch (_IOC_DIR(cmd)) {
2859         case _IOC_READ:
2860         case (_IOC_WRITE | _IOC_READ):
2861                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2862                         err = -EFAULT;
2863                 break;
2864         }
2865
2866 out:
2867         kfree(mbuf);
2868         return err;
2869 }
2870 EXPORT_SYMBOL(video_usercopy);
2871
2872 long video_ioctl2(struct file *file,
2873                unsigned int cmd, unsigned long arg)
2874 {
2875         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2876 }
2877 EXPORT_SYMBOL(video_ioctl2);