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         [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 159 };
 160 EXPORT_SYMBOL(v4l2_type_names);
 161
 162 static const char *v4l2_memory_names[] = {
 163         [V4L2_MEMORY_MMAP]    = "mmap",
 164         [V4L2_MEMORY_USERPTR] = "userptr",
 165         [V4L2_MEMORY_OVERLAY] = "overlay",
 166         [V4L2_MEMORY_DMABUF] = "dmabuf",
 167 };
 168
 169 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 170
 171 /* ------------------------------------------------------------------ */
 172 /* debug help functions                                               */
 173
 174 static void v4l_print_querycap(const void *arg, bool write_only)
 175 {
 176         const struct v4l2_capability *p = arg;
 177
 178         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 179                 (int)sizeof(p->driver), p->driver,
 180                 (int)sizeof(p->card), p->card,
 181                 (int)sizeof(p->bus_info), p->bus_info,
 182                 p->version, p->capabilities, p->device_caps);
 183 }
 184
 185 static void v4l_print_enuminput(const void *arg, bool write_only)
 186 {
 187         const struct v4l2_input *p = arg;
 188
 189         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 190                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 191                 p->tuner, (unsigned long long)p->std, p->status,
 192                 p->capabilities);
 193 }
 194
 195 static void v4l_print_enumoutput(const void *arg, bool write_only)
 196 {
 197         const struct v4l2_output *p = arg;
 198
 199         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 200                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 201                 p->modulator, (unsigned long long)p->std, p->capabilities);
 202 }
 203
 204 static void v4l_print_audio(const void *arg, bool write_only)
 205 {
 206         const struct v4l2_audio *p = arg;
 207
 208         if (write_only)
 209                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 210         else
 211                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 212                         p->index, (int)sizeof(p->name), p->name,
 213                         p->capability, p->mode);
 214 }
 215
 216 static void v4l_print_audioout(const void *arg, bool write_only)
 217 {
 218         const struct v4l2_audioout *p = arg;
 219
 220         if (write_only)
 221                 pr_cont("index=%u\n", p->index);
 222         else
 223                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 224                         p->index, (int)sizeof(p->name), p->name,
 225                         p->capability, p->mode);
 226 }
 227
 228 static void v4l_print_fmtdesc(const void *arg, bool write_only)
 229 {
 230         const struct v4l2_fmtdesc *p = arg;
 231
 232         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 233                 p->index, prt_names(p->type, v4l2_type_names),
 234                 p->flags, (p->pixelformat & 0xff),
 235                 (p->pixelformat >>  8) & 0xff,
 236                 (p->pixelformat >> 16) & 0xff,
 237                 (p->pixelformat >> 24) & 0xff,
 238                 (int)sizeof(p->description), p->description);
 239 }
 240
 241 static void v4l_print_format(const void *arg, bool write_only)
 242 {
 243         const struct v4l2_format *p = arg;
 244         const struct v4l2_pix_format *pix;
 245         const struct v4l2_pix_format_mplane *mp;
 246         const struct v4l2_vbi_format *vbi;
 247         const struct v4l2_sliced_vbi_format *sliced;
 248         const struct v4l2_window *win;
 249         const struct v4l2_sdr_format *sdr;
 250         const struct v4l2_meta_format *meta;
 251         unsigned i;
 252
 253         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 254         switch (p->type) {
 255         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 256         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 257                 pix = &p->fmt.pix;
 258                 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",
 259                         pix->width, pix->height,
 260                         (pix->pixelformat & 0xff),
 261                         (pix->pixelformat >>  8) & 0xff,
 262                         (pix->pixelformat >> 16) & 0xff,
 263                         (pix->pixelformat >> 24) & 0xff,
 264                         prt_names(pix->field, v4l2_field_names),
 265                         pix->bytesperline, pix->sizeimage,
 266                         pix->colorspace, pix->flags, pix->ycbcr_enc,
 267                         pix->quantization, pix->xfer_func);
 268                 break;
 269         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 270         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 271                 mp = &p->fmt.pix_mp;
 272                 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",
 273                         mp->width, mp->height,
 274                         (mp->pixelformat & 0xff),
 275                         (mp->pixelformat >>  8) & 0xff,
 276                         (mp->pixelformat >> 16) & 0xff,
 277                         (mp->pixelformat >> 24) & 0xff,
 278                         prt_names(mp->field, v4l2_field_names),
 279                         mp->colorspace, mp->num_planes, mp->flags,
 280                         mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 281                 for (i = 0; i < mp->num_planes; i++)
 282                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 283                                         mp->plane_fmt[i].bytesperline,
 284                                         mp->plane_fmt[i].sizeimage);
 285                 break;
 286         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 287         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 288                 win = &p->fmt.win;
 289                 /* Note: we can't print the clip list here since the clips
 290                  * pointer is a userspace pointer, not a kernelspace
 291                  * pointer. */
 292                 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",
 293                         win->w.width, win->w.height, win->w.left, win->w.top,
 294                         prt_names(win->field, v4l2_field_names),
 295                         win->chromakey, win->clipcount, win->clips,
 296                         win->bitmap, win->global_alpha);
 297                 break;
 298         case V4L2_BUF_TYPE_VBI_CAPTURE:
 299         case V4L2_BUF_TYPE_VBI_OUTPUT:
 300                 vbi = &p->fmt.vbi;
 301                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 302                         vbi->sampling_rate, vbi->offset,
 303                         vbi->samples_per_line,
 304                         (vbi->sample_format & 0xff),
 305                         (vbi->sample_format >>  8) & 0xff,
 306                         (vbi->sample_format >> 16) & 0xff,
 307                         (vbi->sample_format >> 24) & 0xff,
 308                         vbi->start[0], vbi->start[1],
 309                         vbi->count[0], vbi->count[1]);
 310                 break;
 311         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 312         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 313                 sliced = &p->fmt.sliced;
 314                 pr_cont(", service_set=0x%08x, io_size=%d\n",
 315                                 sliced->service_set, sliced->io_size);
 316                 for (i = 0; i < 24; i++)
 317                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 318                                 sliced->service_lines[0][i],
 319                                 sliced->service_lines[1][i]);
 320                 break;
 321         case V4L2_BUF_TYPE_SDR_CAPTURE:
 322         case V4L2_BUF_TYPE_SDR_OUTPUT:
 323                 sdr = &p->fmt.sdr;
 324                 pr_cont(", pixelformat=%c%c%c%c\n",
 325                         (sdr->pixelformat >>  0) & 0xff,
 326                         (sdr->pixelformat >>  8) & 0xff,
 327                         (sdr->pixelformat >> 16) & 0xff,
 328                         (sdr->pixelformat >> 24) & 0xff);
 329                 break;
 330         case V4L2_BUF_TYPE_META_CAPTURE:
 331                 meta = &p->fmt.meta;
 332                 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
 333                         (meta->dataformat >>  0) & 0xff,
 334                         (meta->dataformat >>  8) & 0xff,
 335                         (meta->dataformat >> 16) & 0xff,
 336                         (meta->dataformat >> 24) & 0xff,
 337                         meta->buffersize);
 338                 break;
 339         }
 340 }
 341
 342 static void v4l_print_framebuffer(const void *arg, bool write_only)
 343 {
 344         const struct v4l2_framebuffer *p = arg;
 345
 346         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 347                         p->capability, p->flags, p->base,
 348                         p->fmt.width, p->fmt.height,
 349                         (p->fmt.pixelformat & 0xff),
 350                         (p->fmt.pixelformat >>  8) & 0xff,
 351                         (p->fmt.pixelformat >> 16) & 0xff,
 352                         (p->fmt.pixelformat >> 24) & 0xff,
 353                         p->fmt.bytesperline, p->fmt.sizeimage,
 354                         p->fmt.colorspace);
 355 }
 356
 357 static void v4l_print_buftype(const void *arg, bool write_only)
 358 {
 359         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 360 }
 361
 362 static void v4l_print_modulator(const void *arg, bool write_only)
 363 {
 364         const struct v4l2_modulator *p = arg;
 365
 366         if (write_only)
 367                 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 368         else
 369                 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 370                         p->index, (int)sizeof(p->name), p->name, p->capability,
 371                         p->rangelow, p->rangehigh, p->txsubchans);
 372 }
 373
 374 static void v4l_print_tuner(const void *arg, bool write_only)
 375 {
 376         const struct v4l2_tuner *p = arg;
 377
 378         if (write_only)
 379                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 380         else
 381                 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",
 382                         p->index, (int)sizeof(p->name), p->name, p->type,
 383                         p->capability, p->rangelow,
 384                         p->rangehigh, p->signal, p->afc,
 385                         p->rxsubchans, p->audmode);
 386 }
 387
 388 static void v4l_print_frequency(const void *arg, bool write_only)
 389 {
 390         const struct v4l2_frequency *p = arg;
 391
 392         pr_cont("tuner=%u, type=%u, frequency=%u\n",
 393                                 p->tuner, p->type, p->frequency);
 394 }
 395
 396 static void v4l_print_standard(const void *arg, bool write_only)
 397 {
 398         const struct v4l2_standard *p = arg;
 399
 400         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 401                 p->index,
 402                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 403                 p->frameperiod.numerator,
 404                 p->frameperiod.denominator,
 405                 p->framelines);
 406 }
 407
 408 static void v4l_print_std(const void *arg, bool write_only)
 409 {
 410         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 411 }
 412
 413 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 414 {
 415         const struct v4l2_hw_freq_seek *p = arg;
 416
 417         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 418                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 419                 p->rangelow, p->rangehigh);
 420 }
 421
 422 static void v4l_print_requestbuffers(const void *arg, bool write_only)
 423 {
 424         const struct v4l2_requestbuffers *p = arg;
 425
 426         pr_cont("count=%d, type=%s, memory=%s\n",
 427                 p->count,
 428                 prt_names(p->type, v4l2_type_names),
 429                 prt_names(p->memory, v4l2_memory_names));
 430 }
 431
 432 static void v4l_print_buffer(const void *arg, bool write_only)
 433 {
 434         const struct v4l2_buffer *p = arg;
 435         const struct v4l2_timecode *tc = &p->timecode;
 436         const struct v4l2_plane *plane;
 437         int i;
 438
 439         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 440                         p->timestamp.tv_sec / 3600,
 441                         (int)(p->timestamp.tv_sec / 60) % 60,
 442                         (int)(p->timestamp.tv_sec % 60),
 443                         (long)p->timestamp.tv_usec,
 444                         p->index,
 445                         prt_names(p->type, v4l2_type_names),
 446                         p->flags, prt_names(p->field, v4l2_field_names),
 447                         p->sequence, prt_names(p->memory, v4l2_memory_names));
 448
 449         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 450                 pr_cont("\n");
 451                 for (i = 0; i < p->length; ++i) {
 452                         plane = &p->m.planes[i];
 453                         printk(KERN_DEBUG
 454                                 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 455                                 i, plane->bytesused, plane->data_offset,
 456                                 plane->m.userptr, plane->length);
 457                 }
 458         } else {
 459                 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 460                         p->bytesused, p->m.userptr, p->length);
 461         }
 462
 463         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 464                         tc->hours, tc->minutes, tc->seconds,
 465                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 466 }
 467
 468 static void v4l_print_exportbuffer(const void *arg, bool write_only)
 469 {
 470         const struct v4l2_exportbuffer *p = arg;
 471
 472         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 473                 p->fd, prt_names(p->type, v4l2_type_names),
 474                 p->index, p->plane, p->flags);
 475 }
 476
 477 static void v4l_print_create_buffers(const void *arg, bool write_only)
 478 {
 479         const struct v4l2_create_buffers *p = arg;
 480
 481         pr_cont("index=%d, count=%d, memory=%s, ",
 482                         p->index, p->count,
 483                         prt_names(p->memory, v4l2_memory_names));
 484         v4l_print_format(&p->format, write_only);
 485 }
 486
 487 static void v4l_print_streamparm(const void *arg, bool write_only)
 488 {
 489         const struct v4l2_streamparm *p = arg;
 490
 491         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 492
 493         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 494             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 495                 const struct v4l2_captureparm *c = &p->parm.capture;
 496
 497                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 498                         c->capability, c->capturemode,
 499                         c->timeperframe.numerator, c->timeperframe.denominator,
 500                         c->extendedmode, c->readbuffers);
 501         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 502                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 503                 const struct v4l2_outputparm *c = &p->parm.output;
 504
 505                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 506                         c->capability, c->outputmode,
 507                         c->timeperframe.numerator, c->timeperframe.denominator,
 508                         c->extendedmode, c->writebuffers);
 509         } else {
 510                 pr_cont("\n");
 511         }
 512 }
 513
 514 static void v4l_print_queryctrl(const void *arg, bool write_only)
 515 {
 516         const struct v4l2_queryctrl *p = arg;
 517
 518         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 519                         p->id, p->type, (int)sizeof(p->name), p->name,
 520                         p->minimum, p->maximum,
 521                         p->step, p->default_value, p->flags);
 522 }
 523
 524 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 525 {
 526         const struct v4l2_query_ext_ctrl *p = arg;
 527
 528         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",
 529                         p->id, p->type, (int)sizeof(p->name), p->name,
 530                         p->minimum, p->maximum,
 531                         p->step, p->default_value, p->flags,
 532                         p->elem_size, p->elems, p->nr_of_dims,
 533                         p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 534 }
 535
 536 static void v4l_print_querymenu(const void *arg, bool write_only)
 537 {
 538         const struct v4l2_querymenu *p = arg;
 539
 540         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 541 }
 542
 543 static void v4l_print_control(const void *arg, bool write_only)
 544 {
 545         const struct v4l2_control *p = arg;
 546
 547         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 548 }
 549
 550 static void v4l_print_ext_controls(const void *arg, bool write_only)
 551 {
 552         const struct v4l2_ext_controls *p = arg;
 553         int i;
 554
 555         pr_cont("which=0x%x, count=%d, error_idx=%d",
 556                         p->which, p->count, p->error_idx);
 557         for (i = 0; i < p->count; i++) {
 558                 if (!p->controls[i].size)
 559                         pr_cont(", id/val=0x%x/0x%x",
 560                                 p->controls[i].id, p->controls[i].value);
 561                 else
 562                         pr_cont(", id/size=0x%x/%u",
 563                                 p->controls[i].id, p->controls[i].size);
 564         }
 565         pr_cont("\n");
 566 }
 567
 568 static void v4l_print_cropcap(const void *arg, bool write_only)
 569 {
 570         const struct v4l2_cropcap *p = arg;
 571
 572         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 573                 prt_names(p->type, v4l2_type_names),
 574                 p->bounds.width, p->bounds.height,
 575                 p->bounds.left, p->bounds.top,
 576                 p->defrect.width, p->defrect.height,
 577                 p->defrect.left, p->defrect.top,
 578                 p->pixelaspect.numerator, p->pixelaspect.denominator);
 579 }
 580
 581 static void v4l_print_crop(const void *arg, bool write_only)
 582 {
 583         const struct v4l2_crop *p = arg;
 584
 585         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 586                 prt_names(p->type, v4l2_type_names),
 587                 p->c.width, p->c.height,
 588                 p->c.left, p->c.top);
 589 }
 590
 591 static void v4l_print_selection(const void *arg, bool write_only)
 592 {
 593         const struct v4l2_selection *p = arg;
 594
 595         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 596                 prt_names(p->type, v4l2_type_names),
 597                 p->target, p->flags,
 598                 p->r.width, p->r.height, p->r.left, p->r.top);
 599 }
 600
 601 static void v4l_print_jpegcompression(const void *arg, bool write_only)
 602 {
 603         const struct v4l2_jpegcompression *p = arg;
 604
 605         pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 606                 p->quality, p->APPn, p->APP_len,
 607                 p->COM_len, p->jpeg_markers);
 608 }
 609
 610 static void v4l_print_enc_idx(const void *arg, bool write_only)
 611 {
 612         const struct v4l2_enc_idx *p = arg;
 613
 614         pr_cont("entries=%d, entries_cap=%d\n",
 615                         p->entries, p->entries_cap);
 616 }
 617
 618 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 619 {
 620         const struct v4l2_encoder_cmd *p = arg;
 621
 622         pr_cont("cmd=%d, flags=0x%x\n",
 623                         p->cmd, p->flags);
 624 }
 625
 626 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 627 {
 628         const struct v4l2_decoder_cmd *p = arg;
 629
 630         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 631
 632         if (p->cmd == V4L2_DEC_CMD_START)
 633                 pr_info("speed=%d, format=%u\n",
 634                                 p->start.speed, p->start.format);
 635         else if (p->cmd == V4L2_DEC_CMD_STOP)
 636                 pr_info("pts=%llu\n", p->stop.pts);
 637 }
 638
 639 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 640 {
 641         const struct v4l2_dbg_chip_info *p = arg;
 642
 643         pr_cont("type=%u, ", p->match.type);
 644         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 645                 pr_cont("name=%.*s, ",
 646                                 (int)sizeof(p->match.name), p->match.name);
 647         else
 648                 pr_cont("addr=%u, ", p->match.addr);
 649         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 650 }
 651
 652 static void v4l_print_dbg_register(const void *arg, bool write_only)
 653 {
 654         const struct v4l2_dbg_register *p = arg;
 655
 656         pr_cont("type=%u, ", p->match.type);
 657         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 658                 pr_cont("name=%.*s, ",
 659                                 (int)sizeof(p->match.name), p->match.name);
 660         else
 661                 pr_cont("addr=%u, ", p->match.addr);
 662         pr_cont("reg=0x%llx, val=0x%llx\n",
 663                         p->reg, p->val);
 664 }
 665
 666 static void v4l_print_dv_timings(const void *arg, bool write_only)
 667 {
 668         const struct v4l2_dv_timings *p = arg;
 669
 670         switch (p->type) {
 671         case V4L2_DV_BT_656_1120:
 672                 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",
 673                                 p->bt.interlaced, p->bt.pixelclock,
 674                                 p->bt.width, p->bt.height,
 675                                 p->bt.polarities, p->bt.hfrontporch,
 676                                 p->bt.hsync, p->bt.hbackporch,
 677                                 p->bt.vfrontporch, p->bt.vsync,
 678                                 p->bt.vbackporch, p->bt.il_vfrontporch,
 679                                 p->bt.il_vsync, p->bt.il_vbackporch,
 680                                 p->bt.standards, p->bt.flags);
 681                 break;
 682         default:
 683                 pr_cont("type=%d\n", p->type);
 684                 break;
 685         }
 686 }
 687
 688 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 689 {
 690         const struct v4l2_enum_dv_timings *p = arg;
 691
 692         pr_cont("index=%u, ", p->index);
 693         v4l_print_dv_timings(&p->timings, write_only);
 694 }
 695
 696 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 697 {
 698         const struct v4l2_dv_timings_cap *p = arg;
 699
 700         switch (p->type) {
 701         case V4L2_DV_BT_656_1120:
 702                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 703                         p->bt.min_width, p->bt.max_width,
 704                         p->bt.min_height, p->bt.max_height,
 705                         p->bt.min_pixelclock, p->bt.max_pixelclock,
 706                         p->bt.standards, p->bt.capabilities);
 707                 break;
 708         default:
 709                 pr_cont("type=%u\n", p->type);
 710                 break;
 711         }
 712 }
 713
 714 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 715 {
 716         const struct v4l2_frmsizeenum *p = arg;
 717
 718         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 719                         p->index,
 720                         (p->pixel_format & 0xff),
 721                         (p->pixel_format >>  8) & 0xff,
 722                         (p->pixel_format >> 16) & 0xff,
 723                         (p->pixel_format >> 24) & 0xff,
 724                         p->type);
 725         switch (p->type) {
 726         case V4L2_FRMSIZE_TYPE_DISCRETE:
 727                 pr_cont(", wxh=%ux%u\n",
 728                         p->discrete.width, p->discrete.height);
 729                 break;
 730         case V4L2_FRMSIZE_TYPE_STEPWISE:
 731                 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 732                                 p->stepwise.min_width,  p->stepwise.min_height,
 733                                 p->stepwise.step_width, p->stepwise.step_height,
 734                                 p->stepwise.max_width,  p->stepwise.max_height);
 735                 break;
 736         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 737                 /* fall through */
 738         default:
 739                 pr_cont("\n");
 740                 break;
 741         }
 742 }
 743
 744 static void v4l_print_frmivalenum(const void *arg, bool write_only)
 745 {
 746         const struct v4l2_frmivalenum *p = arg;
 747
 748         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 749                         p->index,
 750                         (p->pixel_format & 0xff),
 751                         (p->pixel_format >>  8) & 0xff,
 752                         (p->pixel_format >> 16) & 0xff,
 753                         (p->pixel_format >> 24) & 0xff,
 754                         p->width, p->height, p->type);
 755         switch (p->type) {
 756         case V4L2_FRMIVAL_TYPE_DISCRETE:
 757                 pr_cont(", fps=%d/%d\n",
 758                                 p->discrete.numerator,
 759                                 p->discrete.denominator);
 760                 break;
 761         case V4L2_FRMIVAL_TYPE_STEPWISE:
 762                 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 763                                 p->stepwise.min.numerator,
 764                                 p->stepwise.min.denominator,
 765                                 p->stepwise.max.numerator,
 766                                 p->stepwise.max.denominator,
 767                                 p->stepwise.step.numerator,
 768                                 p->stepwise.step.denominator);
 769                 break;
 770         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 771                 /* fall through */
 772         default:
 773                 pr_cont("\n");
 774                 break;
 775         }
 776 }
 777
 778 static void v4l_print_event(const void *arg, bool write_only)
 779 {
 780         const struct v4l2_event *p = arg;
 781         const struct v4l2_event_ctrl *c;
 782
 783         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
 784                         p->type, p->pending, p->sequence, p->id,
 785                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
 786         switch (p->type) {
 787         case V4L2_EVENT_VSYNC:
 788                 printk(KERN_DEBUG "field=%s\n",
 789                         prt_names(p->u.vsync.field, v4l2_field_names));
 790                 break;
 791         case V4L2_EVENT_CTRL:
 792                 c = &p->u.ctrl;
 793                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 794                         c->changes, c->type);
 795                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 796                         pr_cont("value64=%lld, ", c->value64);
 797                 else
 798                         pr_cont("value=%d, ", c->value);
 799                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 800                         c->flags, c->minimum, c->maximum,
 801                         c->step, c->default_value);
 802                 break;
 803         case V4L2_EVENT_FRAME_SYNC:
 804                 pr_cont("frame_sequence=%u\n",
 805                         p->u.frame_sync.frame_sequence);
 806                 break;
 807         }
 808 }
 809
 810 static void v4l_print_event_subscription(const void *arg, bool write_only)
 811 {
 812         const struct v4l2_event_subscription *p = arg;
 813
 814         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 815                         p->type, p->id, p->flags);
 816 }
 817
 818 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 819 {
 820         const struct v4l2_sliced_vbi_cap *p = arg;
 821         int i;
 822
 823         pr_cont("type=%s, service_set=0x%08x\n",
 824                         prt_names(p->type, v4l2_type_names), p->service_set);
 825         for (i = 0; i < 24; i++)
 826                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 827                                 p->service_lines[0][i],
 828                                 p->service_lines[1][i]);
 829 }
 830
 831 static void v4l_print_freq_band(const void *arg, bool write_only)
 832 {
 833         const struct v4l2_frequency_band *p = arg;
 834
 835         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 836                         p->tuner, p->type, p->index,
 837                         p->capability, p->rangelow,
 838                         p->rangehigh, p->modulation);
 839 }
 840
 841 static void v4l_print_edid(const void *arg, bool write_only)
 842 {
 843         const struct v4l2_edid *p = arg;
 844
 845         pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 846                 p->pad, p->start_block, p->blocks);
 847 }
 848
 849 static void v4l_print_u32(const void *arg, bool write_only)
 850 {
 851         pr_cont("value=%u\n", *(const u32 *)arg);
 852 }
 853
 854 static void v4l_print_newline(const void *arg, bool write_only)
 855 {
 856         pr_cont("\n");
 857 }
 858
 859 static void v4l_print_default(const void *arg, bool write_only)
 860 {
 861         pr_cont("driver-specific ioctl\n");
 862 }
 863
 864 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 865 {
 866         __u32 i;
 867
 868         /* zero the reserved fields */
 869         c->reserved[0] = c->reserved[1] = 0;
 870         for (i = 0; i < c->count; i++)
 871                 c->controls[i].reserved2[0] = 0;
 872
 873         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 874            when using extended controls.
 875            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 876            is it allowed for backwards compatibility.
 877          */
 878         if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 879                 return 0;
 880         if (!c->which)
 881                 return 1;
 882         /* Check that all controls are from the same control class. */
 883         for (i = 0; i < c->count; i++) {
 884                 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 885                         c->error_idx = i;
 886                         return 0;
 887                 }
 888         }
 889         return 1;
 890 }
 891
 892 static int check_fmt(struct file *file, enum v4l2_buf_type type)
 893 {
 894         struct video_device *vfd = video_devdata(file);
 895         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 896         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 897         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 898         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 899         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 900         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 901         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 902
 903         if (ops == NULL)
 904                 return -EINVAL;
 905
 906         switch (type) {
 907         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 908                 if ((is_vid || is_tch) && is_rx &&
 909                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 910                         return 0;
 911                 break;
 912         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 913                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 914                         return 0;
 915                 break;
 916         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 917                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 918                         return 0;
 919                 break;
 920         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 921                 if (is_vid && is_tx &&
 922                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 923                         return 0;
 924                 break;
 925         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 926                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 927                         return 0;
 928                 break;
 929         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 930                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 931                         return 0;
 932                 break;
 933         case V4L2_BUF_TYPE_VBI_CAPTURE:
 934                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 935                         return 0;
 936                 break;
 937         case V4L2_BUF_TYPE_VBI_OUTPUT:
 938                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 939                         return 0;
 940                 break;
 941         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 942                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 943                         return 0;
 944                 break;
 945         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 946                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 947                         return 0;
 948                 break;
 949         case V4L2_BUF_TYPE_SDR_CAPTURE:
 950                 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 951                         return 0;
 952                 break;
 953         case V4L2_BUF_TYPE_SDR_OUTPUT:
 954                 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 955                         return 0;
 956                 break;
 957         case V4L2_BUF_TYPE_META_CAPTURE:
 958                 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
 959                         return 0;
 960                 break;
 961         default:
 962                 break;
 963         }
 964         return -EINVAL;
 965 }
 966
 967 static void v4l_sanitize_format(struct v4l2_format *fmt)
 968 {
 969         unsigned int offset;
 970
 971         /*
 972          * The v4l2_pix_format structure has been extended with fields that were
 973          * not previously required to be set to zero by applications. The priv
 974          * field, when set to a magic value, indicates the the extended fields
 975          * are valid. Otherwise they will contain undefined values. To simplify
 976          * the API towards drivers zero the extended fields and set the priv
 977          * field to the magic value when the extended pixel format structure
 978          * isn't used by applications.
 979          */
 980
 981         if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
 982             fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 983                 return;
 984
 985         if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
 986                 return;
 987
 988         fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
 989
 990         offset = offsetof(struct v4l2_pix_format, priv)
 991                + sizeof(fmt->fmt.pix.priv);
 992         memset(((void *)&fmt->fmt.pix) + offset, 0,
 993                sizeof(fmt->fmt.pix) - offset);
 994 }
 995
 996 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
 997                                 struct file *file, void *fh, void *arg)
 998 {
 999         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1000         struct video_device *vfd = video_devdata(file);
1001         int ret;
1002
1003         cap->version = LINUX_VERSION_CODE;
1004         cap->device_caps = vfd->device_caps;
1005         cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1006
1007         ret = ops->vidioc_querycap(file, fh, cap);
1008
1009         cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1010         /*
1011          * Drivers MUST fill in device_caps, so check for this and
1012          * warn if it was forgotten.
1013          */
1014         WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1015                 !cap->device_caps, "Bad caps for driver %s, %x %x",
1016                 cap->driver, cap->capabilities, cap->device_caps);
1017         cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1018
1019         return ret;
1020 }
1021
1022 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1023                                 struct file *file, void *fh, void *arg)
1024 {
1025         struct video_device *vfd = video_devdata(file);
1026         int ret;
1027
1028         ret = v4l_enable_media_source(vfd);
1029         if (ret)
1030                 return ret;
1031         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1032 }
1033
1034 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1035                                 struct file *file, void *fh, void *arg)
1036 {
1037         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1038 }
1039
1040 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1041                                 struct file *file, void *fh, void *arg)
1042 {
1043         struct video_device *vfd;
1044         u32 *p = arg;
1045
1046         vfd = video_devdata(file);
1047         *p = v4l2_prio_max(vfd->prio);
1048         return 0;
1049 }
1050
1051 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1052                                 struct file *file, void *fh, void *arg)
1053 {
1054         struct video_device *vfd;
1055         struct v4l2_fh *vfh;
1056         u32 *p = arg;
1057
1058         vfd = video_devdata(file);
1059         if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1060                 return -ENOTTY;
1061         vfh = file->private_data;
1062         return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1063 }
1064
1065 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1066                                 struct file *file, void *fh, void *arg)
1067 {
1068         struct video_device *vfd = video_devdata(file);
1069         struct v4l2_input *p = arg;
1070
1071         /*
1072          * We set the flags for CAP_DV_TIMINGS &
1073          * CAP_STD here based on ioctl handler provided by the
1074          * driver. If the driver doesn't support these
1075          * for a specific input, it must override these flags.
1076          */
1077         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1078                 p->capabilities |= V4L2_IN_CAP_STD;
1079
1080         return ops->vidioc_enum_input(file, fh, p);
1081 }
1082
1083 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1084                                 struct file *file, void *fh, void *arg)
1085 {
1086         struct video_device *vfd = video_devdata(file);
1087         struct v4l2_output *p = arg;
1088
1089         /*
1090          * We set the flags for CAP_DV_TIMINGS &
1091          * CAP_STD here based on ioctl handler provided by the
1092          * driver. If the driver doesn't support these
1093          * for a specific output, it must override these flags.
1094          */
1095         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1096                 p->capabilities |= V4L2_OUT_CAP_STD;
1097
1098         return ops->vidioc_enum_output(file, fh, p);
1099 }
1100
1101 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1102 {
1103         const unsigned sz = sizeof(fmt->description);
1104         const char *descr = NULL;
1105         u32 flags = 0;
1106
1107         /*
1108          * We depart from the normal coding style here since the descriptions
1109          * should be aligned so it is easy to see which descriptions will be
1110          * longer than 31 characters (the max length for a description).
1111          * And frankly, this is easier to read anyway.
1112          *
1113          * Note that gcc will use O(log N) comparisons to find the right case.
1114          */
1115         switch (fmt->pixelformat) {
1116         /* Max description length mask: descr = "0123456789012345678901234567890" */
1117         case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1118         case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1119         case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1120         case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1121         case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1122         case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1123         case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1124         case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1125         case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1126         case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1127         case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1128         case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1129         case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1130         case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1131         case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1132         case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1133         case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1134         case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1135         case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1136         case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1137         case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1138         case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1139         case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1140         case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1141         case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1142         case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1143         case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1144         case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1145         case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1146         case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1147         case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1148         case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1149         case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1150         case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1151         case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1152         case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1153         case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1154         case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1155         case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1156         case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1157         case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1158         case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1159         case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1160         case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1161         case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1162         case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1163         case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1164         case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1165         case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1166         case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1167         case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1168         case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1169         case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1170         case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1171         case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1172         case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1173         case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1174         case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1175         case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1176         case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1177         case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1178         case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1179         case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1180         case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1181         case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1182         case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1183         case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1184         case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1185         case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1186         case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1187         case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1188         case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1189         case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1190         case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1191         case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1192         case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1193         case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1194         case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1195         case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1196         case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1197         case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1198         case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1199         case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1200         case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1201         case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1202         case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1203         case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1204         case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1205         case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1206         case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1207         case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1208         case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1209         case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1210         case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1211         case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1212         case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1213         case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1214         case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1215         case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1216         case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1217         case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1218         case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1219         case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1220         case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1221         case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1222         case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1223         case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1224         case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1225         case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1226         case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1227         case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1228         case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1229         case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1230         case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1231         case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1232         case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit signed deltas"; break;
1233         case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit signed deltas"; break;
1234         case V4L2_TCH_FMT_TU16:         descr = "16-bit unsigned touch data"; break;
1235         case V4L2_TCH_FMT_TU08:         descr = "8-bit unsigned touch data"; break;
1236
1237         default:
1238                 /* Compressed formats */
1239                 flags = V4L2_FMT_FLAG_COMPRESSED;
1240                 switch (fmt->pixelformat) {
1241                 /* Max description length mask: descr = "0123456789012345678901234567890" */
1242                 case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1243                 case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1244                 case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1245                 case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1246                 case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1247                 case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1248                 case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1249                 case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1250                 case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1251                 case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1252                 case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 part 2 ES"; break;
1253                 case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1254                 case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1255                 case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1256                 case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1257                 case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1258                 case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1259                 case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1260                 case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1261                 case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1262                 case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1263                 case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1264                 case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1265                 case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1266                 case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1267                 case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1268                 case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1269                 case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1270                 case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1271                 case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1272                 case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1273                 case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1274                 case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1275                 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1276                 case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1277                 default:
1278                         WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1279                         if (fmt->description[0])
1280                                 return;
1281                         flags = 0;
1282                         snprintf(fmt->description, sz, "%c%c%c%c%s",
1283                                         (char)(fmt->pixelformat & 0x7f),
1284                                         (char)((fmt->pixelformat >> 8) & 0x7f),
1285                                         (char)((fmt->pixelformat >> 16) & 0x7f),
1286                                         (char)((fmt->pixelformat >> 24) & 0x7f),
1287                                         (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1288                         break;
1289                 }
1290         }
1291
1292         if (descr)
1293                 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1294         fmt->flags = flags;
1295 }
1296
1297 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1298                                 struct file *file, void *fh, void *arg)
1299 {
1300         struct v4l2_fmtdesc *p = arg;
1301         struct video_device *vfd = video_devdata(file);
1302         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1303         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1304         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1305         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1306         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1307         int ret = -EINVAL;
1308
1309         switch (p->type) {
1310         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1311                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
1312                         break;
1313                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1314                 break;
1315         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1316                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1317                         break;
1318                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1319                 break;
1320         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1321                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1322                         break;
1323                 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1324                 break;
1325         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1326                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1327                         break;
1328                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1329                 break;
1330         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1331                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1332                         break;
1333                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1334                 break;
1335         case V4L2_BUF_TYPE_SDR_CAPTURE:
1336                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1337                         break;
1338                 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1339                 break;
1340         case V4L2_BUF_TYPE_SDR_OUTPUT:
1341                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1342                         break;
1343                 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1344                 break;
1345         case V4L2_BUF_TYPE_META_CAPTURE:
1346                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_meta_cap))
1347                         break;
1348                 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1349                 break;
1350         }
1351         if (ret == 0)
1352                 v4l_fill_fmtdesc(p);
1353         return ret;
1354 }
1355
1356 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1357                                 struct file *file, void *fh, void *arg)
1358 {
1359         struct v4l2_format *p = arg;
1360         struct video_device *vfd = video_devdata(file);
1361         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1362         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1363         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1364         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1365         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1366         int ret;
1367
1368         /*
1369          * fmt can't be cleared for these overlay types due to the 'clips'
1370          * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1371          * Those are provided by the user. So handle these two overlay types
1372          * first, and then just do a simple memset for the other types.
1373          */
1374         switch (p->type) {
1375         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1376         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1377                 struct v4l2_clip __user *clips = p->fmt.win.clips;
1378                 u32 clipcount = p->fmt.win.clipcount;
1379                 void __user *bitmap = p->fmt.win.bitmap;
1380
1381                 memset(&p->fmt, 0, sizeof(p->fmt));
1382                 p->fmt.win.clips = clips;
1383                 p->fmt.win.clipcount = clipcount;
1384                 p->fmt.win.bitmap = bitmap;
1385                 break;
1386         }
1387         default:
1388                 memset(&p->fmt, 0, sizeof(p->fmt));
1389                 break;
1390         }
1391
1392         switch (p->type) {
1393         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1394                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
1395                         break;
1396                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1397                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1398                 /* just in case the driver zeroed it again */
1399                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1400                 return ret;
1401         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1402                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1403                         break;
1404                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1405         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1406                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1407                         break;
1408                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1409         case V4L2_BUF_TYPE_VBI_CAPTURE:
1410                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1411                         break;
1412                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1413         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1414                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1415                         break;
1416                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1417         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1418                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1419                         break;
1420                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1421                 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1422                 /* just in case the driver zeroed it again */
1423                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1424                 return ret;
1425         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1426                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1427                         break;
1428                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1429         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1430                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1431                         break;
1432                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1433         case V4L2_BUF_TYPE_VBI_OUTPUT:
1434                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1435                         break;
1436                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1437         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1438                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1439                         break;
1440                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1441         case V4L2_BUF_TYPE_SDR_CAPTURE:
1442                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1443                         break;
1444                 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1445         case V4L2_BUF_TYPE_SDR_OUTPUT:
1446                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1447                         break;
1448                 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1449         case V4L2_BUF_TYPE_META_CAPTURE:
1450                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_meta_cap))
1451                         break;
1452                 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1453         }
1454         return -EINVAL;
1455 }
1456
1457 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1458 {
1459         /*
1460          * The v4l2_pix_format structure contains fields that make no sense for
1461          * touch. Set them to default values in this case.
1462          */
1463
1464         p->field = V4L2_FIELD_NONE;
1465         p->colorspace = V4L2_COLORSPACE_RAW;
1466         p->flags = 0;
1467         p->ycbcr_enc = 0;
1468         p->quantization = 0;
1469         p->xfer_func = 0;
1470 }
1471
1472 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1473                                 struct file *file, void *fh, void *arg)
1474 {
1475         struct v4l2_format *p = arg;
1476         struct video_device *vfd = video_devdata(file);
1477         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1478         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1479         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1480         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1481         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1482         int ret;
1483
1484         ret = v4l_enable_media_source(vfd);
1485         if (ret)
1486                 return ret;
1487         v4l_sanitize_format(p);
1488
1489         switch (p->type) {
1490         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1491                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
1492                         break;
1493                 CLEAR_AFTER_FIELD(p, fmt.pix);
1494                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1495                 /* just in case the driver zeroed it again */
1496                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1497                 if (is_tch)
1498                         v4l_pix_format_touch(&p->fmt.pix);
1499                 return ret;
1500         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1501                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1502                         break;
1503                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1504                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1505         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1506                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1507                         break;
1508                 CLEAR_AFTER_FIELD(p, fmt.win);
1509                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1510         case V4L2_BUF_TYPE_VBI_CAPTURE:
1511                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1512                         break;
1513                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1514                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1515         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1516                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1517                         break;
1518                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1519                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1520         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1521                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1522                         break;
1523                 CLEAR_AFTER_FIELD(p, fmt.pix);
1524                 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1525                 /* just in case the driver zeroed it again */
1526                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1527                 return ret;
1528         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1529                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1530                         break;
1531                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1532                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1533         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1534                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1535                         break;
1536                 CLEAR_AFTER_FIELD(p, fmt.win);
1537                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1538         case V4L2_BUF_TYPE_VBI_OUTPUT:
1539                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1540                         break;
1541                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1542                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1543         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1544                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1545                         break;
1546                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1547                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1548         case V4L2_BUF_TYPE_SDR_CAPTURE:
1549                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1550                         break;
1551                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1552                 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1553         case V4L2_BUF_TYPE_SDR_OUTPUT:
1554                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1555                         break;
1556                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1557                 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1558         case V4L2_BUF_TYPE_META_CAPTURE:
1559                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_meta_cap))
1560                         break;
1561                 CLEAR_AFTER_FIELD(p, fmt.meta);
1562                 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1563         }
1564         return -EINVAL;
1565 }
1566
1567 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1568                                 struct file *file, void *fh, void *arg)
1569 {
1570         struct v4l2_format *p = arg;
1571         struct video_device *vfd = video_devdata(file);
1572         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1573         bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1574         bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1575         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1576         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1577         int ret;
1578
1579         v4l_sanitize_format(p);
1580
1581         switch (p->type) {
1582         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1583                 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap))
1584                         break;
1585                 CLEAR_AFTER_FIELD(p, fmt.pix);
1586                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1587                 /* just in case the driver zeroed it again */
1588                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1589                 return ret;
1590         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1591                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1592                         break;
1593                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1594                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1595         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1596                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1597                         break;
1598                 CLEAR_AFTER_FIELD(p, fmt.win);
1599                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1600         case V4L2_BUF_TYPE_VBI_CAPTURE:
1601                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1602                         break;
1603                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1604                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1605         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1606                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1607                         break;
1608                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1609                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1610         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1611                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1612                         break;
1613                 CLEAR_AFTER_FIELD(p, fmt.pix);
1614                 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1615                 /* just in case the driver zeroed it again */
1616                 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1617                 return ret;
1618         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1619                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1620                         break;
1621                 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1622                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1623         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1624                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1625                         break;
1626                 CLEAR_AFTER_FIELD(p, fmt.win);
1627                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1628         case V4L2_BUF_TYPE_VBI_OUTPUT:
1629                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1630                         break;
1631                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1632                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1633         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1634                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1635                         break;
1636                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1637                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1638         case V4L2_BUF_TYPE_SDR_CAPTURE:
1639                 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1640                         break;
1641                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1642                 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1643         case V4L2_BUF_TYPE_SDR_OUTPUT:
1644                 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1645                         break;
1646                 CLEAR_AFTER_FIELD(p, fmt.sdr);
1647                 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1648         case V4L2_BUF_TYPE_META_CAPTURE:
1649                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_meta_cap))
1650                         break;
1651                 CLEAR_AFTER_FIELD(p, fmt.meta);
1652                 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1653         }
1654         return -EINVAL;
1655 }
1656
1657 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1658                                 struct file *file, void *fh, void *arg)
1659 {
1660         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1661 }
1662
1663 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1664                                 struct file *file, void *fh, void *arg)
1665 {
1666         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1667 }
1668
1669 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1670                                 struct file *file, void *fh, void *arg)
1671 {
1672         struct video_device *vfd = video_devdata(file);
1673         struct v4l2_tuner *p = arg;
1674         int err;
1675
1676         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1677                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1678         err = ops->vidioc_g_tuner(file, fh, p);
1679         if (!err)
1680                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1681         return err;
1682 }
1683
1684 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1685                                 struct file *file, void *fh, void *arg)
1686 {
1687         struct video_device *vfd = video_devdata(file);
1688         struct v4l2_tuner *p = arg;
1689         int ret;
1690
1691         ret = v4l_enable_media_source(vfd);
1692         if (ret)
1693                 return ret;
1694         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1695                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1696         return ops->vidioc_s_tuner(file, fh, p);
1697 }
1698
1699 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1700                                 struct file *file, void *fh, void *arg)
1701 {
1702         struct video_device *vfd = video_devdata(file);
1703         struct v4l2_modulator *p = arg;
1704         int err;
1705
1706         if (vfd->vfl_type == VFL_TYPE_RADIO)
1707                 p->type = V4L2_TUNER_RADIO;
1708
1709         err = ops->vidioc_g_modulator(file, fh, p);
1710         if (!err)
1711                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1712         return err;
1713 }
1714
1715 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1716                                 struct file *file, void *fh, void *arg)
1717 {
1718         struct video_device *vfd = video_devdata(file);
1719         struct v4l2_modulator *p = arg;
1720
1721         if (vfd->vfl_type == VFL_TYPE_RADIO)
1722                 p->type = V4L2_TUNER_RADIO;
1723
1724         return ops->vidioc_s_modulator(file, fh, p);
1725 }
1726
1727 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1728                                 struct file *file, void *fh, void *arg)
1729 {
1730         struct video_device *vfd = video_devdata(file);
1731         struct v4l2_frequency *p = arg;
1732
1733         if (vfd->vfl_type == VFL_TYPE_SDR)
1734                 p->type = V4L2_TUNER_SDR;
1735         else
1736                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1737                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1738         return ops->vidioc_g_frequency(file, fh, p);
1739 }
1740
1741 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1742                                 struct file *file, void *fh, void *arg)
1743 {
1744         struct video_device *vfd = video_devdata(file);
1745         const struct v4l2_frequency *p = arg;
1746         enum v4l2_tuner_type type;
1747         int ret;
1748
1749         ret = v4l_enable_media_source(vfd);
1750         if (ret)
1751                 return ret;
1752         if (vfd->vfl_type == VFL_TYPE_SDR) {
1753                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1754                         return -EINVAL;
1755         } else {
1756                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1757                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1758                 if (type != p->type)
1759                         return -EINVAL;
1760         }
1761         return ops->vidioc_s_frequency(file, fh, p);
1762 }
1763
1764 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1765                                 struct file *file, void *fh, void *arg)
1766 {
1767         struct video_device *vfd = video_devdata(file);
1768         struct v4l2_standard *p = arg;
1769         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1770         unsigned int index = p->index, i, j = 0;
1771         const char *descr = "";
1772
1773         /* Return -ENODATA if the tvnorms for the current input
1774            or output is 0, meaning that it doesn't support this API. */
1775         if (id == 0)
1776                 return -ENODATA;
1777
1778         /* Return norm array in a canonical way */
1779         for (i = 0; i <= index && id; i++) {
1780                 /* last std value in the standards array is 0, so this
1781                    while always ends there since (id & 0) == 0. */
1782                 while ((id & standards[j].std) != standards[j].std)
1783                         j++;
1784                 curr_id = standards[j].std;
1785                 descr = standards[j].descr;
1786                 j++;
1787                 if (curr_id == 0)
1788                         break;
1789                 if (curr_id != V4L2_STD_PAL &&
1790                                 curr_id != V4L2_STD_SECAM &&
1791                                 curr_id != V4L2_STD_NTSC)
1792                         id &= ~curr_id;
1793         }
1794         if (i <= index)
1795                 return -EINVAL;
1796
1797         v4l2_video_std_construct(p, curr_id, descr);
1798         return 0;
1799 }
1800
1801 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1802                                 struct file *file, void *fh, void *arg)
1803 {
1804         struct video_device *vfd = video_devdata(file);
1805         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1806         int ret;
1807
1808         ret = v4l_enable_media_source(vfd);
1809         if (ret)
1810                 return ret;
1811         norm = id & vfd->tvnorms;
1812         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1813                 return -EINVAL;
1814
1815         /* Calls the specific handler */
1816         return ops->vidioc_s_std(file, fh, norm);
1817 }
1818
1819 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1820                                 struct file *file, void *fh, void *arg)
1821 {
1822         struct video_device *vfd = video_devdata(file);
1823         v4l2_std_id *p = arg;
1824         int ret;
1825
1826         ret = v4l_enable_media_source(vfd);
1827         if (ret)
1828                 return ret;
1829         /*
1830          * If no signal is detected, then the driver should return
1831          * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1832          * any standards that do not apply removed.
1833          *
1834          * This means that tuners, audio and video decoders can join
1835          * their efforts to improve the standards detection.
1836          */
1837         *p = vfd->tvnorms;
1838         return ops->vidioc_querystd(file, fh, arg);
1839 }
1840
1841 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1842                                 struct file *file, void *fh, void *arg)
1843 {
1844         struct video_device *vfd = video_devdata(file);
1845         struct v4l2_hw_freq_seek *p = arg;
1846         enum v4l2_tuner_type type;
1847         int ret;
1848
1849         ret = v4l_enable_media_source(vfd);
1850         if (ret)
1851                 return ret;
1852         /* s_hw_freq_seek is not supported for SDR for now */
1853         if (vfd->vfl_type == VFL_TYPE_SDR)
1854                 return -EINVAL;
1855
1856         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1857                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1858         if (p->type != type)
1859                 return -EINVAL;
1860         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1861 }
1862
1863 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1864                                 struct file *file, void *fh, void *arg)
1865 {
1866         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1867 }
1868
1869 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1870                                 struct file *file, void *fh, void *arg)
1871 {
1872         struct v4l2_requestbuffers *p = arg;
1873         int ret = check_fmt(file, p->type);
1874
1875         if (ret)
1876                 return ret;
1877
1878         CLEAR_AFTER_FIELD(p, memory);
1879
1880         return ops->vidioc_reqbufs(file, fh, p);
1881 }
1882
1883 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1884                                 struct file *file, void *fh, void *arg)
1885 {
1886         struct v4l2_buffer *p = arg;
1887         int ret = check_fmt(file, p->type);
1888
1889         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1890 }
1891
1892 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1893                                 struct file *file, void *fh, void *arg)
1894 {
1895         struct v4l2_buffer *p = arg;
1896         int ret = check_fmt(file, p->type);
1897
1898         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1899 }
1900
1901 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1902                                 struct file *file, void *fh, void *arg)
1903 {
1904         struct v4l2_buffer *p = arg;
1905         int ret = check_fmt(file, p->type);
1906
1907         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1908 }
1909
1910 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1911                                 struct file *file, void *fh, void *arg)
1912 {
1913         struct v4l2_create_buffers *create = arg;
1914         int ret = check_fmt(file, create->format.type);
1915
1916         if (ret)
1917                 return ret;
1918
1919         CLEAR_AFTER_FIELD(create, format);
1920
1921         v4l_sanitize_format(&create->format);
1922
1923         ret = ops->vidioc_create_bufs(file, fh, create);
1924
1925         if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1926             create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1927                 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1928
1929         return ret;
1930 }
1931
1932 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1933                                 struct file *file, void *fh, void *arg)
1934 {
1935         struct v4l2_buffer *b = arg;
1936         int ret = check_fmt(file, b->type);
1937
1938         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1939 }
1940
1941 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1942                                 struct file *file, void *fh, void *arg)
1943 {
1944         struct v4l2_streamparm *p = arg;
1945         v4l2_std_id std;
1946         int ret = check_fmt(file, p->type);
1947
1948         if (ret)
1949                 return ret;
1950         if (ops->vidioc_g_parm)
1951                 return ops->vidioc_g_parm(file, fh, p);
1952         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1953             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1954                 return -EINVAL;
1955         p->parm.capture.readbuffers = 2;
1956         ret = ops->vidioc_g_std(file, fh, &std);
1957         if (ret == 0)
1958                 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1959         return ret;
1960 }
1961
1962 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1963                                 struct file *file, void *fh, void *arg)
1964 {
1965         struct v4l2_streamparm *p = arg;
1966         int ret = check_fmt(file, p->type);
1967
1968         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1969 }
1970
1971 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1972                                 struct file *file, void *fh, void *arg)
1973 {
1974         struct video_device *vfd = video_devdata(file);
1975         struct v4l2_queryctrl *p = arg;
1976         struct v4l2_fh *vfh =
1977                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1978
1979         if (vfh && vfh->ctrl_handler)
1980                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1981         if (vfd->ctrl_handler)
1982                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1983         if (ops->vidioc_queryctrl)
1984                 return ops->vidioc_queryctrl(file, fh, p);
1985         return -ENOTTY;
1986 }
1987
1988 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1989                                 struct file *file, void *fh, void *arg)
1990 {
1991         struct video_device *vfd = video_devdata(file);
1992         struct v4l2_query_ext_ctrl *p = arg;
1993         struct v4l2_fh *vfh =
1994                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1995
1996         if (vfh && vfh->ctrl_handler)
1997                 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1998         if (vfd->ctrl_handler)
1999                 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2000         if (ops->vidioc_query_ext_ctrl)
2001                 return ops->vidioc_query_ext_ctrl(file, fh, p);
2002         return -ENOTTY;
2003 }
2004
2005 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2006                                 struct file *file, void *fh, void *arg)
2007 {
2008         struct video_device *vfd = video_devdata(file);
2009         struct v4l2_querymenu *p = arg;
2010         struct v4l2_fh *vfh =
2011                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2012
2013         if (vfh && vfh->ctrl_handler)
2014                 return v4l2_querymenu(vfh->ctrl_handler, p);
2015         if (vfd->ctrl_handler)
2016                 return v4l2_querymenu(vfd->ctrl_handler, p);
2017         if (ops->vidioc_querymenu)
2018                 return ops->vidioc_querymenu(file, fh, p);
2019         return -ENOTTY;
2020 }
2021
2022 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2023                                 struct file *file, void *fh, void *arg)
2024 {
2025         struct video_device *vfd = video_devdata(file);
2026         struct v4l2_control *p = arg;
2027         struct v4l2_fh *vfh =
2028                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2029         struct v4l2_ext_controls ctrls;
2030         struct v4l2_ext_control ctrl;
2031
2032         if (vfh && vfh->ctrl_handler)
2033                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2034         if (vfd->ctrl_handler)
2035                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2036         if (ops->vidioc_g_ctrl)
2037                 return ops->vidioc_g_ctrl(file, fh, p);
2038         if (ops->vidioc_g_ext_ctrls == NULL)
2039                 return -ENOTTY;
2040
2041         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2042         ctrls.count = 1;
2043         ctrls.controls = &ctrl;
2044         ctrl.id = p->id;
2045         ctrl.value = p->value;
2046         if (check_ext_ctrls(&ctrls, 1)) {
2047                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2048
2049                 if (ret == 0)
2050                         p->value = ctrl.value;
2051                 return ret;
2052         }
2053         return -EINVAL;
2054 }
2055
2056 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2057                                 struct file *file, void *fh, void *arg)
2058 {
2059         struct video_device *vfd = video_devdata(file);
2060         struct v4l2_control *p = arg;
2061         struct v4l2_fh *vfh =
2062                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2063         struct v4l2_ext_controls ctrls;
2064         struct v4l2_ext_control ctrl;
2065
2066         if (vfh && vfh->ctrl_handler)
2067                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2068         if (vfd->ctrl_handler)
2069                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2070         if (ops->vidioc_s_ctrl)
2071                 return ops->vidioc_s_ctrl(file, fh, p);
2072         if (ops->vidioc_s_ext_ctrls == NULL)
2073                 return -ENOTTY;
2074
2075         ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2076         ctrls.count = 1;
2077         ctrls.controls = &ctrl;
2078         ctrl.id = p->id;
2079         ctrl.value = p->value;
2080         if (check_ext_ctrls(&ctrls, 1))
2081                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2082         return -EINVAL;
2083 }
2084
2085 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2086                                 struct file *file, void *fh, void *arg)
2087 {
2088         struct video_device *vfd = video_devdata(file);
2089         struct v4l2_ext_controls *p = arg;
2090         struct v4l2_fh *vfh =
2091                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2092
2093         p->error_idx = p->count;
2094         if (vfh && vfh->ctrl_handler)
2095                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2096         if (vfd->ctrl_handler)
2097                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2098         if (ops->vidioc_g_ext_ctrls == NULL)
2099                 return -ENOTTY;
2100         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2101                                         -EINVAL;
2102 }
2103
2104 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2105                                 struct file *file, void *fh, void *arg)
2106 {
2107         struct video_device *vfd = video_devdata(file);
2108         struct v4l2_ext_controls *p = arg;
2109         struct v4l2_fh *vfh =
2110                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2111
2112         p->error_idx = p->count;
2113         if (vfh && vfh->ctrl_handler)
2114                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2115         if (vfd->ctrl_handler)
2116                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2117         if (ops->vidioc_s_ext_ctrls == NULL)
2118                 return -ENOTTY;
2119         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2120                                         -EINVAL;
2121 }
2122
2123 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2124                                 struct file *file, void *fh, void *arg)
2125 {
2126         struct video_device *vfd = video_devdata(file);
2127         struct v4l2_ext_controls *p = arg;
2128         struct v4l2_fh *vfh =
2129                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2130
2131         p->error_idx = p->count;
2132         if (vfh && vfh->ctrl_handler)
2133                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2134         if (vfd->ctrl_handler)
2135                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2136         if (ops->vidioc_try_ext_ctrls == NULL)
2137                 return -ENOTTY;
2138         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2139                                         -EINVAL;
2140 }
2141
2142 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2143                                 struct file *file, void *fh, void *arg)
2144 {
2145         struct v4l2_crop *p = arg;
2146         struct v4l2_selection s = {
2147                 .type = p->type,
2148         };
2149         int ret;
2150
2151         if (ops->vidioc_g_crop)
2152                 return ops->vidioc_g_crop(file, fh, p);
2153         /* simulate capture crop using selection api */
2154
2155         /* crop means compose for output devices */
2156         if (V4L2_TYPE_IS_OUTPUT(p->type))
2157                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2158         else
2159                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2160
2161         ret = ops->vidioc_g_selection(file, fh, &s);
2162
2163         /* copying results to old structure on success */
2164         if (!ret)
2165                 p->c = s.r;
2166         return ret;
2167 }
2168
2169 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2170                                 struct file *file, void *fh, void *arg)
2171 {
2172         struct v4l2_crop *p = arg;
2173         struct v4l2_selection s = {
2174                 .type = p->type,
2175                 .r = p->c,
2176         };
2177
2178         if (ops->vidioc_s_crop)
2179                 return ops->vidioc_s_crop(file, fh, p);
2180         /* simulate capture crop using selection api */
2181
2182         /* crop means compose for output devices */
2183         if (V4L2_TYPE_IS_OUTPUT(p->type))
2184                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2185         else
2186                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2187
2188         return ops->vidioc_s_selection(file, fh, &s);
2189 }
2190
2191 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2192                                 struct file *file, void *fh, void *arg)
2193 {
2194         struct v4l2_cropcap *p = arg;
2195         struct v4l2_selection s = { .type = p->type };
2196         int ret = 0;
2197
2198         /* setting trivial pixelaspect */
2199         p->pixelaspect.numerator = 1;
2200         p->pixelaspect.denominator = 1;
2201
2202         /*
2203          * The determine_valid_ioctls() call already should ensure
2204          * that this can never happen, but just in case...
2205          */
2206         if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2207                 return -ENOTTY;
2208
2209         if (ops->vidioc_cropcap)
2210                 ret = ops->vidioc_cropcap(file, fh, p);
2211
2212         if (!ops->vidioc_g_selection)
2213                 return ret;
2214
2215         /*
2216          * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2217          * square pixel aspect ratio in that case.
2218          */
2219         if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2220                 return ret;
2221
2222         /* Use g_selection() to fill in the bounds and defrect rectangles */
2223
2224         /* obtaining bounds */
2225         if (V4L2_TYPE_IS_OUTPUT(p->type))
2226                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2227         else
2228                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2229
2230         ret = ops->vidioc_g_selection(file, fh, &s);
2231         if (ret)
2232                 return ret;
2233         p->bounds = s.r;
2234
2235         /* obtaining defrect */
2236         if (V4L2_TYPE_IS_OUTPUT(p->type))
2237                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2238         else
2239                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2240
2241         ret = ops->vidioc_g_selection(file, fh, &s);
2242         if (ret)
2243                 return ret;
2244         p->defrect = s.r;
2245
2246         return 0;
2247 }
2248
2249 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2250                                 struct file *file, void *fh, void *arg)
2251 {
2252         struct video_device *vfd = video_devdata(file);
2253         int ret;
2254
2255         if (vfd->v4l2_dev)
2256                 pr_info("%s: =================  START STATUS  =================\n",
2257                         vfd->v4l2_dev->name);
2258         ret = ops->vidioc_log_status(file, fh);
2259         if (vfd->v4l2_dev)
2260                 pr_info("%s: ==================  END STATUS  ==================\n",
2261                         vfd->v4l2_dev->name);
2262         return ret;
2263 }
2264
2265 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2266                                 struct file *file, void *fh, void *arg)
2267 {
2268 #ifdef CONFIG_VIDEO_ADV_DEBUG
2269         struct v4l2_dbg_register *p = arg;
2270         struct video_device *vfd = video_devdata(file);
2271         struct v4l2_subdev *sd;
2272         int idx = 0;
2273
2274         if (!capable(CAP_SYS_ADMIN))
2275                 return -EPERM;
2276         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2277                 if (vfd->v4l2_dev == NULL)
2278                         return -EINVAL;
2279                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2280                         if (p->match.addr == idx++)
2281                                 return v4l2_subdev_call(sd, core, g_register, p);
2282                 return -EINVAL;
2283         }
2284         if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2285             (ops->vidioc_g_chip_info || p->match.addr == 0))
2286                 return ops->vidioc_g_register(file, fh, p);
2287         return -EINVAL;
2288 #else
2289         return -ENOTTY;
2290 #endif
2291 }
2292
2293 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2294                                 struct file *file, void *fh, void *arg)
2295 {
2296 #ifdef CONFIG_VIDEO_ADV_DEBUG
2297         const struct v4l2_dbg_register *p = arg;
2298         struct video_device *vfd = video_devdata(file);
2299         struct v4l2_subdev *sd;
2300         int idx = 0;
2301
2302         if (!capable(CAP_SYS_ADMIN))
2303                 return -EPERM;
2304         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2305                 if (vfd->v4l2_dev == NULL)
2306                         return -EINVAL;
2307                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2308                         if (p->match.addr == idx++)
2309                                 return v4l2_subdev_call(sd, core, s_register, p);
2310                 return -EINVAL;
2311         }
2312         if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2313             (ops->vidioc_g_chip_info || p->match.addr == 0))
2314                 return ops->vidioc_s_register(file, fh, p);
2315         return -EINVAL;
2316 #else
2317         return -ENOTTY;
2318 #endif
2319 }
2320
2321 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2322                                 struct file *file, void *fh, void *arg)
2323 {
2324 #ifdef CONFIG_VIDEO_ADV_DEBUG
2325         struct video_device *vfd = video_devdata(file);
2326         struct v4l2_dbg_chip_info *p = arg;
2327         struct v4l2_subdev *sd;
2328         int idx = 0;
2329
2330         switch (p->match.type) {
2331         case V4L2_CHIP_MATCH_BRIDGE:
2332                 if (ops->vidioc_s_register)
2333                         p->flags |= V4L2_CHIP_FL_WRITABLE;
2334                 if (ops->vidioc_g_register)
2335                         p->flags |= V4L2_CHIP_FL_READABLE;
2336                 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2337                 if (ops->vidioc_g_chip_info)
2338                         return ops->vidioc_g_chip_info(file, fh, arg);
2339                 if (p->match.addr)
2340                         return -EINVAL;
2341                 return 0;
2342
2343         case V4L2_CHIP_MATCH_SUBDEV:
2344                 if (vfd->v4l2_dev == NULL)
2345                         break;
2346                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2347                         if (p->match.addr != idx++)
2348                                 continue;
2349                         if (sd->ops->core && sd->ops->core->s_register)
2350                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
2351                         if (sd->ops->core && sd->ops->core->g_register)
2352                                 p->flags |= V4L2_CHIP_FL_READABLE;
2353                         strlcpy(p->name, sd->name, sizeof(p->name));
2354                         return 0;
2355                 }
2356                 break;
2357         }
2358         return -EINVAL;
2359 #else
2360         return -ENOTTY;
2361 #endif
2362 }
2363
2364 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2365                                 struct file *file, void *fh, void *arg)
2366 {
2367         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2368 }
2369
2370 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2371                                 struct file *file, void *fh, void *arg)
2372 {
2373         return ops->vidioc_subscribe_event(fh, arg);
2374 }
2375
2376 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2377                                 struct file *file, void *fh, void *arg)
2378 {
2379         return ops->vidioc_unsubscribe_event(fh, arg);
2380 }
2381
2382 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2383                                 struct file *file, void *fh, void *arg)
2384 {
2385         struct v4l2_sliced_vbi_cap *p = arg;
2386         int ret = check_fmt(file, p->type);
2387
2388         if (ret)
2389                 return ret;
2390
2391         /* Clear up to type, everything after type is zeroed already */
2392         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2393
2394         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2395 }
2396
2397 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2398                                 struct file *file, void *fh, void *arg)
2399 {
2400         struct video_device *vfd = video_devdata(file);
2401         struct v4l2_frequency_band *p = arg;
2402         enum v4l2_tuner_type type;
2403         int err;
2404
2405         if (vfd->vfl_type == VFL_TYPE_SDR) {
2406                 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2407                         return -EINVAL;
2408                 type = p->type;
2409         } else {
2410                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2411                                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2412                 if (type != p->type)
2413                         return -EINVAL;
2414         }
2415         if (ops->vidioc_enum_freq_bands) {
2416                 err = ops->vidioc_enum_freq_bands(file, fh, p);
2417                 if (err != -ENOTTY)
2418                         return err;
2419         }
2420         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2421                 struct v4l2_tuner t = {
2422                         .index = p->tuner,
2423                         .type = type,
2424                 };
2425
2426                 if (p->index)
2427                         return -EINVAL;
2428                 err = ops->vidioc_g_tuner(file, fh, &t);
2429                 if (err)
2430                         return err;
2431                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2432                 p->rangelow = t.rangelow;
2433                 p->rangehigh = t.rangehigh;
2434                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2435                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2436                 return 0;
2437         }
2438         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2439                 struct v4l2_modulator m = {
2440                         .index = p->tuner,
2441                 };
2442
2443                 if (type != V4L2_TUNER_RADIO)
2444                         return -EINVAL;
2445                 if (p->index)
2446                         return -EINVAL;
2447                 err = ops->vidioc_g_modulator(file, fh, &m);
2448                 if (err)
2449                         return err;
2450                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2451                 p->rangelow = m.rangelow;
2452                 p->rangehigh = m.rangehigh;
2453                 p->modulation = (type == V4L2_TUNER_RADIO) ?
2454                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2455                 return 0;
2456         }
2457         return -ENOTTY;
2458 }
2459
2460 struct v4l2_ioctl_info {
2461         unsigned int ioctl;
2462         u32 flags;
2463         const char * const name;
2464         union {
2465                 u32 offset;
2466                 int (*func)(const struct v4l2_ioctl_ops *ops,
2467                                 struct file *file, void *fh, void *p);
2468         } u;
2469         void (*debug)(const void *arg, bool write_only);
2470 };
2471
2472 /* This control needs a priority check */
2473 #define INFO_FL_PRIO    (1 << 0)
2474 /* This control can be valid if the filehandle passes a control handler. */
2475 #define INFO_FL_CTRL    (1 << 1)
2476 /* This is a standard ioctl, no need for special code */
2477 #define INFO_FL_STD     (1 << 2)
2478 /* This is ioctl has its own function */
2479 #define INFO_FL_FUNC    (1 << 3)
2480 /* Queuing ioctl */
2481 #define INFO_FL_QUEUE   (1 << 4)
2482 /* Zero struct from after the field to the end */
2483 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2484         ((offsetof(struct v4l2_struct, field) +                 \
2485           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2486 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2487
2488 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2489         [_IOC_NR(_ioctl)] = {                                           \
2490                 .ioctl = _ioctl,                                        \
2491                 .flags = _flags | INFO_FL_STD,                          \
2492                 .name = #_ioctl,                                        \
2493                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2494                 .debug = _debug,                                        \
2495         }
2496
2497 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2498         [_IOC_NR(_ioctl)] = {                                           \
2499                 .ioctl = _ioctl,                                        \
2500                 .flags = _flags | INFO_FL_FUNC,                         \
2501                 .name = #_ioctl,                                        \
2502                 .u.func = _func,                                        \
2503                 .debug = _debug,                                        \
2504         }
2505
2506 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2507         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2508         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2509         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2510         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2511         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2512         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2513         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2514         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2515         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2516         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2517         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2518         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2519         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2520         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2521         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2522         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2523         IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2524         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2525         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2526         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2527         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2528         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2529         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2530         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2531         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2532         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2533         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2534         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2535         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2536         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2537         IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2538         IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2539         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2540         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2541         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2542         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2543         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2544         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2545         IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2546         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2547         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2548         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2549         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2550         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2551         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2552         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2553         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2554         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2555         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2556         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2557         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2558         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2559         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2560         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2561         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)),
2562         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2563         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2564         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2565         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2566         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2567         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2568         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2569         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2570         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2571         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2572         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2573         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2574         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2575         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2576         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)),
2577         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2578         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2579         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2580         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2581         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2582         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2583         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2584         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2585         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2586         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2587         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)),
2588         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)),
2589 };
2590 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2591
2592 bool v4l2_is_known_ioctl(unsigned int cmd)
2593 {
2594         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2595                 return false;
2596         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2597 }
2598
2599 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2600 {
2601         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2602                 return vdev->lock;
2603         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2604                 return NULL;
2605         if (vdev->queue && vdev->queue->lock &&
2606                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2607                 return vdev->queue->lock;
2608         return vdev->lock;
2609 }
2610
2611 /* Common ioctl debug function. This function can be used by
2612    external ioctl messages as well as internal V4L ioctl */
2613 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2614 {
2615         const char *dir, *type;
2616
2617         if (prefix)
2618                 printk(KERN_DEBUG "%s: ", prefix);
2619
2620         switch (_IOC_TYPE(cmd)) {
2621         case 'd':
2622                 type = "v4l2_int";
2623                 break;
2624         case 'V':
2625                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2626                         type = "v4l2";
2627                         break;
2628                 }
2629                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2630                 return;
2631         default:
2632                 type = "unknown";
2633                 break;
2634         }
2635
2636         switch (_IOC_DIR(cmd)) {
2637         case _IOC_NONE:              dir = "--"; break;
2638         case _IOC_READ:              dir = "r-"; break;
2639         case _IOC_WRITE:             dir = "-w"; break;
2640         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2641         default:                     dir = "*ERR*"; break;
2642         }
2643         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2644                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2645 }
2646 EXPORT_SYMBOL(v4l_printk_ioctl);
2647
2648 static long __video_do_ioctl(struct file *file,
2649                 unsigned int cmd, void *arg)
2650 {
2651         struct video_device *vfd = video_devdata(file);
2652         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2653         bool write_only = false;
2654         struct v4l2_ioctl_info default_info;
2655         const struct v4l2_ioctl_info *info;
2656         void *fh = file->private_data;
2657         struct v4l2_fh *vfh = NULL;
2658         int dev_debug = vfd->dev_debug;
2659         long ret = -ENOTTY;
2660
2661         if (ops == NULL) {
2662                 pr_warn("%s: has no ioctl_ops.\n",
2663                                 video_device_node_name(vfd));
2664                 return ret;
2665         }
2666
2667         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2668                 vfh = file->private_data;
2669
2670         if (v4l2_is_known_ioctl(cmd)) {
2671                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2672
2673                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2674                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2675                         goto done;
2676
2677                 if (vfh && (info->flags & INFO_FL_PRIO)) {
2678                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2679                         if (ret)
2680                                 goto done;
2681                 }
2682         } else {
2683                 default_info.ioctl = cmd;
2684                 default_info.flags = 0;
2685                 default_info.debug = v4l_print_default;
2686                 info = &default_info;
2687         }
2688
2689         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2690         if (info->flags & INFO_FL_STD) {
2691                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2692                 const void *p = vfd->ioctl_ops;
2693                 const vidioc_op *vidioc = p + info->u.offset;
2694
2695                 ret = (*vidioc)(file, fh, arg);
2696         } else if (info->flags & INFO_FL_FUNC) {
2697                 ret = info->u.func(ops, file, fh, arg);
2698         } else if (!ops->vidioc_default) {
2699                 ret = -ENOTTY;
2700         } else {
2701                 ret = ops->vidioc_default(file, fh,
2702                         vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2703                         cmd, arg);
2704         }
2705
2706 done:
2707         if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2708                 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2709                     (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2710                         return ret;
2711
2712                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2713                 if (ret < 0)
2714                         pr_cont(": error %ld", ret);
2715                 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2716                         pr_cont("\n");
2717                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2718                         info->debug(arg, write_only);
2719                 else {
2720                         pr_cont(": ");
2721                         info->debug(arg, write_only);
2722                 }
2723         }
2724
2725         return ret;
2726 }
2727
2728 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2729                             void __user **user_ptr, void ***kernel_ptr)
2730 {
2731         int ret = 0;
2732
2733         switch (cmd) {
2734         case VIDIOC_PREPARE_BUF:
2735         case VIDIOC_QUERYBUF:
2736         case VIDIOC_QBUF:
2737         case VIDIOC_DQBUF: {
2738                 struct v4l2_buffer *buf = parg;
2739
2740                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2741                         if (buf->length > VIDEO_MAX_PLANES) {
2742                                 ret = -EINVAL;
2743                                 break;
2744                         }
2745                         *user_ptr = (void __user *)buf->m.planes;
2746                         *kernel_ptr = (void **)&buf->m.planes;
2747                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2748                         ret = 1;
2749                 }
2750                 break;
2751         }
2752
2753         case VIDIOC_G_EDID:
2754         case VIDIOC_S_EDID: {
2755                 struct v4l2_edid *edid = parg;
2756
2757                 if (edid->blocks) {
2758                         if (edid->blocks > 256) {
2759                                 ret = -EINVAL;
2760                                 break;
2761                         }
2762                         *user_ptr = (void __user *)edid->edid;
2763                         *kernel_ptr = (void **)&edid->edid;
2764                         *array_size = edid->blocks * 128;
2765                         ret = 1;
2766                 }
2767                 break;
2768         }
2769
2770         case VIDIOC_S_EXT_CTRLS:
2771         case VIDIOC_G_EXT_CTRLS:
2772         case VIDIOC_TRY_EXT_CTRLS: {
2773                 struct v4l2_ext_controls *ctrls = parg;
2774
2775                 if (ctrls->count != 0) {
2776                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2777                                 ret = -EINVAL;
2778                                 break;
2779                         }
2780                         *user_ptr = (void __user *)ctrls->controls;
2781                         *kernel_ptr = (void **)&ctrls->controls;
2782                         *array_size = sizeof(struct v4l2_ext_control)
2783                                     * ctrls->count;
2784                         ret = 1;
2785                 }
2786                 break;
2787         }
2788         }
2789
2790         return ret;
2791 }
2792
2793 long
2794 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2795                v4l2_kioctl func)
2796 {
2797         char    sbuf[128];
2798         void    *mbuf = NULL;
2799         void    *parg = (void *)arg;
2800         long    err  = -EINVAL;
2801         bool    has_array_args;
2802         size_t  array_size = 0;
2803         void __user *user_ptr = NULL;
2804         void    **kernel_ptr = NULL;
2805
2806         /*  Copy arguments into temp kernel buffer  */
2807         if (_IOC_DIR(cmd) != _IOC_NONE) {
2808                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2809                         parg = sbuf;
2810                 } else {
2811                         /* too big to allocate from stack */
2812                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2813                         if (NULL == mbuf)
2814                                 return -ENOMEM;
2815                         parg = mbuf;
2816                 }
2817
2818                 err = -EFAULT;
2819                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2820                         unsigned int n = _IOC_SIZE(cmd);
2821
2822                         /*
2823                          * In some cases, only a few fields are used as input,
2824                          * i.e. when the app sets "index" and then the driver
2825                          * fills in the rest of the structure for the thing
2826                          * with that index.  We only need to copy up the first
2827                          * non-input field.
2828                          */
2829                         if (v4l2_is_known_ioctl(cmd)) {
2830                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2831                                 if (flags & INFO_FL_CLEAR_MASK)
2832                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2833                         }
2834
2835                         if (copy_from_user(parg, (void __user *)arg, n))
2836                                 goto out;
2837
2838                         /* zero out anything we don't copy from userspace */
2839                         if (n < _IOC_SIZE(cmd))
2840                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2841                 } else {
2842                         /* read-only ioctl */
2843                         memset(parg, 0, _IOC_SIZE(cmd));
2844                 }
2845         }
2846
2847         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2848         if (err < 0)
2849                 goto out;
2850         has_array_args = err;
2851
2852         if (has_array_args) {
2853                 /*
2854                  * When adding new types of array args, make sure that the
2855                  * parent argument to ioctl (which contains the pointer to the
2856                  * array) fits into sbuf (so that mbuf will still remain
2857                  * unused up to here).
2858                  */
2859                 mbuf = kmalloc(array_size, GFP_KERNEL);
2860                 err = -ENOMEM;
2861                 if (NULL == mbuf)
2862                         goto out_array_args;
2863                 err = -EFAULT;
2864                 if (copy_from_user(mbuf, user_ptr, array_size))
2865                         goto out_array_args;
2866                 *kernel_ptr = mbuf;
2867         }
2868
2869         /* Handles IOCTL */
2870         err = func(file, cmd, parg);
2871         if (err == -ENOIOCTLCMD)
2872                 err = -ENOTTY;
2873         if (err == 0) {
2874                 if (cmd == VIDIOC_DQBUF)
2875                         trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2876                 else if (cmd == VIDIOC_QBUF)
2877                         trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2878         }
2879
2880         if (has_array_args) {
2881                 *kernel_ptr = (void __force *)user_ptr;
2882                 if (copy_to_user(user_ptr, mbuf, array_size))
2883                         err = -EFAULT;
2884                 goto out_array_args;
2885         }
2886         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2887            results that must be returned. */
2888         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2889                 goto out;
2890
2891 out_array_args:
2892         /*  Copy results into user buffer  */
2893         switch (_IOC_DIR(cmd)) {
2894         case _IOC_READ:
2895         case (_IOC_WRITE | _IOC_READ):
2896                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2897                         err = -EFAULT;
2898                 break;
2899         }
2900
2901 out:
2902         kfree(mbuf);
2903         return err;
2904 }
2905 EXPORT_SYMBOL(video_usercopy);
2906
2907 long video_ioctl2(struct file *file,
2908                unsigned int cmd, unsigned long arg)
2909 {
2910         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2911 }
2912 EXPORT_SYMBOL(video_ioctl2);