linux/drivers/media/v4l2-core/v4l2-ioctl.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Video capture interface for Linux version 2
   4 *
   5 * A generic framework to process V4L2 ioctl commands.
   6 *
   7 * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
   8 *              Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
   9 */
  10
  11#include <linux/compat.h>
  12#include <linux/mm.h>
  13#include <linux/module.h>
  14#include <linux/slab.h>
  15#include <linux/types.h>
  16#include <linux/kernel.h>
  17#include <linux/version.h>
  18
  19#include <linux/videodev2.h>
  20
  21#include <media/v4l2-common.h>
  22#include <media/v4l2-ioctl.h>
  23#include <media/v4l2-ctrls.h>
  24#include <media/v4l2-fh.h>
  25#include <media/v4l2-event.h>
  26#include <media/v4l2-device.h>
  27#include <media/videobuf2-v4l2.h>
  28#include <media/v4l2-mc.h>
  29#include <media/v4l2-mem2mem.h>
  30
  31#include <trace/events/v4l2.h>
  32
  33/* Zero out the end of the struct pointed to by p.  Everything after, but
  34 * not including, the specified field is cleared. */
  35#define CLEAR_AFTER_FIELD(p, field) \
  36        memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  37        0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  38
  39#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  40
  41struct std_descr {
  42        v4l2_std_id std;
  43        const char *descr;
  44};
  45
  46static const struct std_descr standards[] = {
  47        { V4L2_STD_NTSC,        "NTSC"      },
  48        { V4L2_STD_NTSC_M,      "NTSC-M"    },
  49        { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  50        { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  51        { V4L2_STD_NTSC_443,    "NTSC-443"  },
  52        { V4L2_STD_PAL,         "PAL"       },
  53        { V4L2_STD_PAL_BG,      "PAL-BG"    },
  54        { V4L2_STD_PAL_B,       "PAL-B"     },
  55        { V4L2_STD_PAL_B1,      "PAL-B1"    },
  56        { V4L2_STD_PAL_G,       "PAL-G"     },
  57        { V4L2_STD_PAL_H,       "PAL-H"     },
  58        { V4L2_STD_PAL_I,       "PAL-I"     },
  59        { V4L2_STD_PAL_DK,      "PAL-DK"    },
  60        { V4L2_STD_PAL_D,       "PAL-D"     },
  61        { V4L2_STD_PAL_D1,      "PAL-D1"    },
  62        { V4L2_STD_PAL_K,       "PAL-K"     },
  63        { V4L2_STD_PAL_M,       "PAL-M"     },
  64        { V4L2_STD_PAL_N,       "PAL-N"     },
  65        { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  66        { V4L2_STD_PAL_60,      "PAL-60"    },
  67        { V4L2_STD_SECAM,       "SECAM"     },
  68        { V4L2_STD_SECAM_B,     "SECAM-B"   },
  69        { V4L2_STD_SECAM_G,     "SECAM-G"   },
  70        { V4L2_STD_SECAM_H,     "SECAM-H"   },
  71        { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  72        { V4L2_STD_SECAM_D,     "SECAM-D"   },
  73        { V4L2_STD_SECAM_K,     "SECAM-K"   },
  74        { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  75        { V4L2_STD_SECAM_L,     "SECAM-L"   },
  76        { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  77        { 0,                    "Unknown"   }
  78};
  79
  80/* video4linux standard ID conversion to standard name
  81 */
  82const char *v4l2_norm_to_name(v4l2_std_id id)
  83{
  84        u32 myid = id;
  85        int i;
  86
  87        /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  88           64 bit comparisons. So, on that architecture, with some gcc
  89           variants, compilation fails. Currently, the max value is 30bit wide.
  90         */
  91        BUG_ON(myid != id);
  92
  93        for (i = 0; standards[i].std; i++)
  94                if (myid == standards[i].std)
  95                        break;
  96        return standards[i].descr;
  97}
  98EXPORT_SYMBOL(v4l2_norm_to_name);
  99
 100/* Returns frame period for the given standard */
 101void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 102{
 103        if (id & V4L2_STD_525_60) {
 104                frameperiod->numerator = 1001;
 105                frameperiod->denominator = 30000;
 106        } else {
 107                frameperiod->numerator = 1;
 108                frameperiod->denominator = 25;
 109        }
 110}
 111EXPORT_SYMBOL(v4l2_video_std_frame_period);
 112
 113/* Fill in the fields of a v4l2_standard structure according to the
 114   'id' and 'transmission' parameters.  Returns negative on error.  */
 115int v4l2_video_std_construct(struct v4l2_standard *vs,
 116                             int id, const char *name)
 117{
 118        vs->id = id;
 119        v4l2_video_std_frame_period(id, &vs->frameperiod);
 120        vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 121        strscpy(vs->name, name, sizeof(vs->name));
 122        return 0;
 123}
 124EXPORT_SYMBOL(v4l2_video_std_construct);
 125
 126/* Fill in the fields of a v4l2_standard structure according to the
 127 * 'id' and 'vs->index' parameters. Returns negative on error. */
 128int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 129{
 130        v4l2_std_id curr_id = 0;
 131        unsigned int index = vs->index, i, j = 0;
 132        const char *descr = "";
 133
 134        /* Return -ENODATA if the id for the current input
 135           or output is 0, meaning that it doesn't support this API. */
 136        if (id == 0)
 137                return -ENODATA;
 138
 139        /* Return norm array in a canonical way */
 140        for (i = 0; i <= index && id; i++) {
 141                /* last std value in the standards array is 0, so this
 142                   while always ends there since (id & 0) == 0. */
 143                while ((id & standards[j].std) != standards[j].std)
 144                        j++;
 145                curr_id = standards[j].std;
 146                descr = standards[j].descr;
 147                j++;
 148                if (curr_id == 0)
 149                        break;
 150                if (curr_id != V4L2_STD_PAL &&
 151                                curr_id != V4L2_STD_SECAM &&
 152                                curr_id != V4L2_STD_NTSC)
 153                        id &= ~curr_id;
 154        }
 155        if (i <= index)
 156                return -EINVAL;
 157
 158        v4l2_video_std_construct(vs, curr_id, descr);
 159        return 0;
 160}
 161
 162/* ----------------------------------------------------------------- */
 163/* some arrays for pretty-printing debug messages of enum types      */
 164
 165const char *v4l2_field_names[] = {
 166        [V4L2_FIELD_ANY]        = "any",
 167        [V4L2_FIELD_NONE]       = "none",
 168        [V4L2_FIELD_TOP]        = "top",
 169        [V4L2_FIELD_BOTTOM]     = "bottom",
 170        [V4L2_FIELD_INTERLACED] = "interlaced",
 171        [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 172        [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 173        [V4L2_FIELD_ALTERNATE]  = "alternate",
 174        [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 175        [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 176};
 177EXPORT_SYMBOL(v4l2_field_names);
 178
 179const char *v4l2_type_names[] = {
 180        [0]                                = "0",
 181        [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 182        [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 183        [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 184        [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 185        [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 186        [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 187        [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 188        [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 189        [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 190        [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 191        [V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 192        [V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 193        [V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 194        [V4L2_BUF_TYPE_META_OUTPUT]        = "meta-out",
 195};
 196EXPORT_SYMBOL(v4l2_type_names);
 197
 198static const char *v4l2_memory_names[] = {
 199        [V4L2_MEMORY_MMAP]    = "mmap",
 200        [V4L2_MEMORY_USERPTR] = "userptr",
 201        [V4L2_MEMORY_OVERLAY] = "overlay",
 202        [V4L2_MEMORY_DMABUF] = "dmabuf",
 203};
 204
 205#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 206
 207/* ------------------------------------------------------------------ */
 208/* debug help functions                                               */
 209
 210static void v4l_print_querycap(const void *arg, bool write_only)
 211{
 212        const struct v4l2_capability *p = arg;
 213
 214        pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 215                (int)sizeof(p->driver), p->driver,
 216                (int)sizeof(p->card), p->card,
 217                (int)sizeof(p->bus_info), p->bus_info,
 218                p->version, p->capabilities, p->device_caps);
 219}
 220
 221static void v4l_print_enuminput(const void *arg, bool write_only)
 222{
 223        const struct v4l2_input *p = arg;
 224
 225        pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 226                p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 227                p->tuner, (unsigned long long)p->std, p->status,
 228                p->capabilities);
 229}
 230
 231static void v4l_print_enumoutput(const void *arg, bool write_only)
 232{
 233        const struct v4l2_output *p = arg;
 234
 235        pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 236                p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 237                p->modulator, (unsigned long long)p->std, p->capabilities);
 238}
 239
 240static void v4l_print_audio(const void *arg, bool write_only)
 241{
 242        const struct v4l2_audio *p = arg;
 243
 244        if (write_only)
 245                pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 246        else
 247                pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 248                        p->index, (int)sizeof(p->name), p->name,
 249                        p->capability, p->mode);
 250}
 251
 252static void v4l_print_audioout(const void *arg, bool write_only)
 253{
 254        const struct v4l2_audioout *p = arg;
 255
 256        if (write_only)
 257                pr_cont("index=%u\n", p->index);
 258        else
 259                pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 260                        p->index, (int)sizeof(p->name), p->name,
 261                        p->capability, p->mode);
 262}
 263
 264static void v4l_print_fmtdesc(const void *arg, bool write_only)
 265{
 266        const struct v4l2_fmtdesc *p = arg;
 267
 268        pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 269                p->index, prt_names(p->type, v4l2_type_names),
 270                p->flags, &p->pixelformat, p->mbus_code,
 271                (int)sizeof(p->description), p->description);
 272}
 273
 274static void v4l_print_format(const void *arg, bool write_only)
 275{
 276        const struct v4l2_format *p = arg;
 277        const struct v4l2_pix_format *pix;
 278        const struct v4l2_pix_format_mplane *mp;
 279        const struct v4l2_vbi_format *vbi;
 280        const struct v4l2_sliced_vbi_format *sliced;
 281        const struct v4l2_window *win;
 282        const struct v4l2_sdr_format *sdr;
 283        const struct v4l2_meta_format *meta;
 284        u32 planes;
 285        unsigned i;
 286
 287        pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 288        switch (p->type) {
 289        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 290        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 291                pix = &p->fmt.pix;
 292                pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 293                        pix->width, pix->height, &pix->pixelformat,
 294                        prt_names(pix->field, v4l2_field_names),
 295                        pix->bytesperline, pix->sizeimage,
 296                        pix->colorspace, pix->flags, pix->ycbcr_enc,
 297                        pix->quantization, pix->xfer_func);
 298                break;
 299        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 300        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 301                mp = &p->fmt.pix_mp;
 302                pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 303                        mp->width, mp->height, &mp->pixelformat,
 304                        prt_names(mp->field, v4l2_field_names),
 305                        mp->colorspace, mp->num_planes, mp->flags,
 306                        mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 307                planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 308                for (i = 0; i < planes; i++)
 309                        printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 310                                        mp->plane_fmt[i].bytesperline,
 311                                        mp->plane_fmt[i].sizeimage);
 312                break;
 313        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 314        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 315                win = &p->fmt.win;
 316                /* Note: we can't print the clip list here since the clips
 317                 * pointer is a userspace pointer, not a kernelspace
 318                 * pointer. */
 319                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",
 320                        win->w.width, win->w.height, win->w.left, win->w.top,
 321                        prt_names(win->field, v4l2_field_names),
 322                        win->chromakey, win->clipcount, win->clips,
 323                        win->bitmap, win->global_alpha);
 324                break;
 325        case V4L2_BUF_TYPE_VBI_CAPTURE:
 326        case V4L2_BUF_TYPE_VBI_OUTPUT:
 327                vbi = &p->fmt.vbi;
 328                pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 329                        vbi->sampling_rate, vbi->offset,
 330                        vbi->samples_per_line, &vbi->sample_format,
 331                        vbi->start[0], vbi->start[1],
 332                        vbi->count[0], vbi->count[1]);
 333                break;
 334        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 335        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 336                sliced = &p->fmt.sliced;
 337                pr_cont(", service_set=0x%08x, io_size=%d\n",
 338                                sliced->service_set, sliced->io_size);
 339                for (i = 0; i < 24; i++)
 340                        printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 341                                sliced->service_lines[0][i],
 342                                sliced->service_lines[1][i]);
 343                break;
 344        case V4L2_BUF_TYPE_SDR_CAPTURE:
 345        case V4L2_BUF_TYPE_SDR_OUTPUT:
 346                sdr = &p->fmt.sdr;
 347                pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat);
 348                break;
 349        case V4L2_BUF_TYPE_META_CAPTURE:
 350        case V4L2_BUF_TYPE_META_OUTPUT:
 351                meta = &p->fmt.meta;
 352                pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 353                        &meta->dataformat, meta->buffersize);
 354                break;
 355        }
 356}
 357
 358static void v4l_print_framebuffer(const void *arg, bool write_only)
 359{
 360        const struct v4l2_framebuffer *p = arg;
 361
 362        pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 363                p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 364                &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 365                p->fmt.colorspace);
 366}
 367
 368static void v4l_print_buftype(const void *arg, bool write_only)
 369{
 370        pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 371}
 372
 373static void v4l_print_modulator(const void *arg, bool write_only)
 374{
 375        const struct v4l2_modulator *p = arg;
 376
 377        if (write_only)
 378                pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 379        else
 380                pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 381                        p->index, (int)sizeof(p->name), p->name, p->capability,
 382                        p->rangelow, p->rangehigh, p->txsubchans);
 383}
 384
 385static void v4l_print_tuner(const void *arg, bool write_only)
 386{
 387        const struct v4l2_tuner *p = arg;
 388
 389        if (write_only)
 390                pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 391        else
 392                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",
 393                        p->index, (int)sizeof(p->name), p->name, p->type,
 394                        p->capability, p->rangelow,
 395                        p->rangehigh, p->signal, p->afc,
 396                        p->rxsubchans, p->audmode);
 397}
 398
 399static void v4l_print_frequency(const void *arg, bool write_only)
 400{
 401        const struct v4l2_frequency *p = arg;
 402
 403        pr_cont("tuner=%u, type=%u, frequency=%u\n",
 404                                p->tuner, p->type, p->frequency);
 405}
 406
 407static void v4l_print_standard(const void *arg, bool write_only)
 408{
 409        const struct v4l2_standard *p = arg;
 410
 411        pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 412                p->index,
 413                (unsigned long long)p->id, (int)sizeof(p->name), p->name,
 414                p->frameperiod.numerator,
 415                p->frameperiod.denominator,
 416                p->framelines);
 417}
 418
 419static void v4l_print_std(const void *arg, bool write_only)
 420{
 421        pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 422}
 423
 424static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 425{
 426        const struct v4l2_hw_freq_seek *p = arg;
 427
 428        pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 429                p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 430                p->rangelow, p->rangehigh);
 431}
 432
 433static void v4l_print_requestbuffers(const void *arg, bool write_only)
 434{
 435        const struct v4l2_requestbuffers *p = arg;
 436
 437        pr_cont("count=%d, type=%s, memory=%s\n",
 438                p->count,
 439                prt_names(p->type, v4l2_type_names),
 440                prt_names(p->memory, v4l2_memory_names));
 441}
 442
 443static void v4l_print_buffer(const void *arg, bool write_only)
 444{
 445        const struct v4l2_buffer *p = arg;
 446        const struct v4l2_timecode *tc = &p->timecode;
 447        const struct v4l2_plane *plane;
 448        int i;
 449
 450        pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 451                        (int)p->timestamp.tv_sec / 3600,
 452                        ((int)p->timestamp.tv_sec / 60) % 60,
 453                        ((int)p->timestamp.tv_sec % 60),
 454                        (long)p->timestamp.tv_usec,
 455                        p->index,
 456                        prt_names(p->type, v4l2_type_names), p->request_fd,
 457                        p->flags, prt_names(p->field, v4l2_field_names),
 458                        p->sequence, prt_names(p->memory, v4l2_memory_names));
 459
 460        if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 461                pr_cont("\n");
 462                for (i = 0; i < p->length; ++i) {
 463                        plane = &p->m.planes[i];
 464                        printk(KERN_DEBUG
 465                                "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 466                                i, plane->bytesused, plane->data_offset,
 467                                plane->m.userptr, plane->length);
 468                }
 469        } else {
 470                pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 471                        p->bytesused, p->m.userptr, p->length);
 472        }
 473
 474        printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 475                        tc->hours, tc->minutes, tc->seconds,
 476                        tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 477}
 478
 479static void v4l_print_exportbuffer(const void *arg, bool write_only)
 480{
 481        const struct v4l2_exportbuffer *p = arg;
 482
 483        pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 484                p->fd, prt_names(p->type, v4l2_type_names),
 485                p->index, p->plane, p->flags);
 486}
 487
 488static void v4l_print_create_buffers(const void *arg, bool write_only)
 489{
 490        const struct v4l2_create_buffers *p = arg;
 491
 492        pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 493                p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 494                p->capabilities);
 495        v4l_print_format(&p->format, write_only);
 496}
 497
 498static void v4l_print_streamparm(const void *arg, bool write_only)
 499{
 500        const struct v4l2_streamparm *p = arg;
 501
 502        pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 503
 504        if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 505            p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 506                const struct v4l2_captureparm *c = &p->parm.capture;
 507
 508                pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 509                        c->capability, c->capturemode,
 510                        c->timeperframe.numerator, c->timeperframe.denominator,
 511                        c->extendedmode, c->readbuffers);
 512        } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 513                   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 514                const struct v4l2_outputparm *c = &p->parm.output;
 515
 516                pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 517                        c->capability, c->outputmode,
 518                        c->timeperframe.numerator, c->timeperframe.denominator,
 519                        c->extendedmode, c->writebuffers);
 520        } else {
 521                pr_cont("\n");
 522        }
 523}
 524
 525static void v4l_print_queryctrl(const void *arg, bool write_only)
 526{
 527        const struct v4l2_queryctrl *p = arg;
 528
 529        pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 530                        p->id, p->type, (int)sizeof(p->name), p->name,
 531                        p->minimum, p->maximum,
 532                        p->step, p->default_value, p->flags);
 533}
 534
 535static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 536{
 537        const struct v4l2_query_ext_ctrl *p = arg;
 538
 539        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",
 540                        p->id, p->type, (int)sizeof(p->name), p->name,
 541                        p->minimum, p->maximum,
 542                        p->step, p->default_value, p->flags,
 543                        p->elem_size, p->elems, p->nr_of_dims,
 544                        p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 545}
 546
 547static void v4l_print_querymenu(const void *arg, bool write_only)
 548{
 549        const struct v4l2_querymenu *p = arg;
 550
 551        pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 552}
 553
 554static void v4l_print_control(const void *arg, bool write_only)
 555{
 556        const struct v4l2_control *p = arg;
 557        const char *name = v4l2_ctrl_get_name(p->id);
 558
 559        if (name)
 560                pr_cont("name=%s, ", name);
 561        pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 562}
 563
 564static void v4l_print_ext_controls(const void *arg, bool write_only)
 565{
 566        const struct v4l2_ext_controls *p = arg;
 567        int i;
 568
 569        pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 570                        p->which, p->count, p->error_idx, p->request_fd);
 571        for (i = 0; i < p->count; i++) {
 572                unsigned int id = p->controls[i].id;
 573                const char *name = v4l2_ctrl_get_name(id);
 574
 575                if (name)
 576                        pr_cont(", name=%s", name);
 577                if (!p->controls[i].size)
 578                        pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 579                else
 580                        pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 581        }
 582        pr_cont("\n");
 583}
 584
 585static void v4l_print_cropcap(const void *arg, bool write_only)
 586{
 587        const struct v4l2_cropcap *p = arg;
 588
 589        pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 590                prt_names(p->type, v4l2_type_names),
 591                p->bounds.width, p->bounds.height,
 592                p->bounds.left, p->bounds.top,
 593                p->defrect.width, p->defrect.height,
 594                p->defrect.left, p->defrect.top,
 595                p->pixelaspect.numerator, p->pixelaspect.denominator);
 596}
 597
 598static void v4l_print_crop(const void *arg, bool write_only)
 599{
 600        const struct v4l2_crop *p = arg;
 601
 602        pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 603                prt_names(p->type, v4l2_type_names),
 604                p->c.width, p->c.height,
 605                p->c.left, p->c.top);
 606}
 607
 608static void v4l_print_selection(const void *arg, bool write_only)
 609{
 610        const struct v4l2_selection *p = arg;
 611
 612        pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 613                prt_names(p->type, v4l2_type_names),
 614                p->target, p->flags,
 615                p->r.width, p->r.height, p->r.left, p->r.top);
 616}
 617
 618static void v4l_print_jpegcompression(const void *arg, bool write_only)
 619{
 620        const struct v4l2_jpegcompression *p = arg;
 621
 622        pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 623                p->quality, p->APPn, p->APP_len,
 624                p->COM_len, p->jpeg_markers);
 625}
 626
 627static void v4l_print_enc_idx(const void *arg, bool write_only)
 628{
 629        const struct v4l2_enc_idx *p = arg;
 630
 631        pr_cont("entries=%d, entries_cap=%d\n",
 632                        p->entries, p->entries_cap);
 633}
 634
 635static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 636{
 637        const struct v4l2_encoder_cmd *p = arg;
 638
 639        pr_cont("cmd=%d, flags=0x%x\n",
 640                        p->cmd, p->flags);
 641}
 642
 643static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 644{
 645        const struct v4l2_decoder_cmd *p = arg;
 646
 647        pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 648
 649        if (p->cmd == V4L2_DEC_CMD_START)
 650                pr_info("speed=%d, format=%u\n",
 651                                p->start.speed, p->start.format);
 652        else if (p->cmd == V4L2_DEC_CMD_STOP)
 653                pr_info("pts=%llu\n", p->stop.pts);
 654}
 655
 656static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 657{
 658        const struct v4l2_dbg_chip_info *p = arg;
 659
 660        pr_cont("type=%u, ", p->match.type);
 661        if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 662                pr_cont("name=%.*s, ",
 663                                (int)sizeof(p->match.name), p->match.name);
 664        else
 665                pr_cont("addr=%u, ", p->match.addr);
 666        pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 667}
 668
 669static void v4l_print_dbg_register(const void *arg, bool write_only)
 670{
 671        const struct v4l2_dbg_register *p = arg;
 672
 673        pr_cont("type=%u, ", p->match.type);
 674        if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 675                pr_cont("name=%.*s, ",
 676                                (int)sizeof(p->match.name), p->match.name);
 677        else
 678                pr_cont("addr=%u, ", p->match.addr);
 679        pr_cont("reg=0x%llx, val=0x%llx\n",
 680                        p->reg, p->val);
 681}
 682
 683static void v4l_print_dv_timings(const void *arg, bool write_only)
 684{
 685        const struct v4l2_dv_timings *p = arg;
 686
 687        switch (p->type) {
 688        case V4L2_DV_BT_656_1120:
 689                pr_cont("type=bt-656/1120, interlaced=%u, 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",
 690                                p->bt.interlaced, p->bt.pixelclock,
 691                                p->bt.width, p->bt.height,
 692                                p->bt.polarities, p->bt.hfrontporch,
 693                                p->bt.hsync, p->bt.hbackporch,
 694                                p->bt.vfrontporch, p->bt.vsync,
 695                                p->bt.vbackporch, p->bt.il_vfrontporch,
 696                                p->bt.il_vsync, p->bt.il_vbackporch,
 697                                p->bt.standards, p->bt.flags);
 698                break;
 699        default:
 700                pr_cont("type=%d\n", p->type);
 701                break;
 702        }
 703}
 704
 705static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 706{
 707        const struct v4l2_enum_dv_timings *p = arg;
 708
 709        pr_cont("index=%u, ", p->index);
 710        v4l_print_dv_timings(&p->timings, write_only);
 711}
 712
 713static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 714{
 715        const struct v4l2_dv_timings_cap *p = arg;
 716
 717        switch (p->type) {
 718        case V4L2_DV_BT_656_1120:
 719                pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 720                        p->bt.min_width, p->bt.max_width,
 721                        p->bt.min_height, p->bt.max_height,
 722                        p->bt.min_pixelclock, p->bt.max_pixelclock,
 723                        p->bt.standards, p->bt.capabilities);
 724                break;
 725        default:
 726                pr_cont("type=%u\n", p->type);
 727                break;
 728        }
 729}
 730
 731static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 732{
 733        const struct v4l2_frmsizeenum *p = arg;
 734
 735        pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 736                p->index, &p->pixel_format, p->type);
 737        switch (p->type) {
 738        case V4L2_FRMSIZE_TYPE_DISCRETE:
 739                pr_cont(", wxh=%ux%u\n",
 740                        p->discrete.width, p->discrete.height);
 741                break;
 742        case V4L2_FRMSIZE_TYPE_STEPWISE:
 743                pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 744                                p->stepwise.min_width,
 745                                p->stepwise.min_height,
 746                                p->stepwise.max_width,
 747                                p->stepwise.max_height,
 748                                p->stepwise.step_width,
 749                                p->stepwise.step_height);
 750                break;
 751        case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 752        default:
 753                pr_cont("\n");
 754                break;
 755        }
 756}
 757
 758static void v4l_print_frmivalenum(const void *arg, bool write_only)
 759{
 760        const struct v4l2_frmivalenum *p = arg;
 761
 762        pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 763                p->index, &p->pixel_format, p->width, p->height, p->type);
 764        switch (p->type) {
 765        case V4L2_FRMIVAL_TYPE_DISCRETE:
 766                pr_cont(", fps=%d/%d\n",
 767                                p->discrete.numerator,
 768                                p->discrete.denominator);
 769                break;
 770        case V4L2_FRMIVAL_TYPE_STEPWISE:
 771                pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 772                                p->stepwise.min.numerator,
 773                                p->stepwise.min.denominator,
 774                                p->stepwise.max.numerator,
 775                                p->stepwise.max.denominator,
 776                                p->stepwise.step.numerator,
 777                                p->stepwise.step.denominator);
 778                break;
 779        case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 780        default:
 781                pr_cont("\n");
 782                break;
 783        }
 784}
 785
 786static void v4l_print_event(const void *arg, bool write_only)
 787{
 788        const struct v4l2_event *p = arg;
 789        const struct v4l2_event_ctrl *c;
 790
 791        pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 792                        p->type, p->pending, p->sequence, p->id,
 793                        p->timestamp.tv_sec, p->timestamp.tv_nsec);
 794        switch (p->type) {
 795        case V4L2_EVENT_VSYNC:
 796                printk(KERN_DEBUG "field=%s\n",
 797                        prt_names(p->u.vsync.field, v4l2_field_names));
 798                break;
 799        case V4L2_EVENT_CTRL:
 800                c = &p->u.ctrl;
 801                printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 802                        c->changes, c->type);
 803                if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 804                        pr_cont("value64=%lld, ", c->value64);
 805                else
 806                        pr_cont("value=%d, ", c->value);
 807                pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 808                        c->flags, c->minimum, c->maximum,
 809                        c->step, c->default_value);
 810                break;
 811        case V4L2_EVENT_FRAME_SYNC:
 812                pr_cont("frame_sequence=%u\n",
 813                        p->u.frame_sync.frame_sequence);
 814                break;
 815        }
 816}
 817
 818static void v4l_print_event_subscription(const void *arg, bool write_only)
 819{
 820        const struct v4l2_event_subscription *p = arg;
 821
 822        pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 823                        p->type, p->id, p->flags);
 824}
 825
 826static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 827{
 828        const struct v4l2_sliced_vbi_cap *p = arg;
 829        int i;
 830
 831        pr_cont("type=%s, service_set=0x%08x\n",
 832                        prt_names(p->type, v4l2_type_names), p->service_set);
 833        for (i = 0; i < 24; i++)
 834                printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 835                                p->service_lines[0][i],
 836                                p->service_lines[1][i]);
 837}
 838
 839static void v4l_print_freq_band(const void *arg, bool write_only)
 840{
 841        const struct v4l2_frequency_band *p = arg;
 842
 843        pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 844                        p->tuner, p->type, p->index,
 845                        p->capability, p->rangelow,
 846                        p->rangehigh, p->modulation);
 847}
 848
 849static void v4l_print_edid(const void *arg, bool write_only)
 850{
 851        const struct v4l2_edid *p = arg;
 852
 853        pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 854                p->pad, p->start_block, p->blocks);
 855}
 856
 857static void v4l_print_u32(const void *arg, bool write_only)
 858{
 859        pr_cont("value=%u\n", *(const u32 *)arg);
 860}
 861
 862static void v4l_print_newline(const void *arg, bool write_only)
 863{
 864        pr_cont("\n");
 865}
 866
 867static void v4l_print_default(const void *arg, bool write_only)
 868{
 869        pr_cont("driver-specific ioctl\n");
 870}
 871
 872static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 873{
 874        __u32 i;
 875
 876        /* zero the reserved fields */
 877        c->reserved[0] = 0;
 878        for (i = 0; i < c->count; i++)
 879                c->controls[i].reserved2[0] = 0;
 880
 881        /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 882           when using extended controls.
 883           Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 884           is it allowed for backwards compatibility.
 885         */
 886        if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 887                return 0;
 888        if (!c->which)
 889                return 1;
 890        /* Check that all controls are from the same control class. */
 891        for (i = 0; i < c->count; i++) {
 892                if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 893                        c->error_idx = i;
 894                        return 0;
 895                }
 896        }
 897        return 1;
 898}
 899
 900static int check_fmt(struct file *file, enum v4l2_buf_type type)
 901{
 902        const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 903                             V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 904                             V4L2_CAP_VIDEO_OUTPUT |
 905                             V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 906                             V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 907        const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 908                              V4L2_CAP_META_OUTPUT;
 909        struct video_device *vfd = video_devdata(file);
 910        const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 911        bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 912                      (vfd->device_caps & vid_caps);
 913        bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 914        bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 915        bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 916        bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 917                       (vfd->device_caps & meta_caps);
 918        bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 919        bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 920
 921        if (ops == NULL)
 922                return -EINVAL;
 923
 924        switch (type) {
 925        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 926                if ((is_vid || is_tch) && is_rx &&
 927                    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 928                        return 0;
 929                break;
 930        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 931                if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 932                        return 0;
 933                break;
 934        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 935                if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 936                        return 0;
 937                break;
 938        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 939                if (is_vid && is_tx &&
 940                    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 941                        return 0;
 942                break;
 943        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 944                if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 945                        return 0;
 946                break;
 947        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 948                if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 949                        return 0;
 950                break;
 951        case V4L2_BUF_TYPE_VBI_CAPTURE:
 952                if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 953                        return 0;
 954                break;
 955        case V4L2_BUF_TYPE_VBI_OUTPUT:
 956                if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 957                        return 0;
 958                break;
 959        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 960                if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 961                        return 0;
 962                break;
 963        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 964                if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 965                        return 0;
 966                break;
 967        case V4L2_BUF_TYPE_SDR_CAPTURE:
 968                if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 969                        return 0;
 970                break;
 971        case V4L2_BUF_TYPE_SDR_OUTPUT:
 972                if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 973                        return 0;
 974                break;
 975        case V4L2_BUF_TYPE_META_CAPTURE:
 976                if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 977                        return 0;
 978                break;
 979        case V4L2_BUF_TYPE_META_OUTPUT:
 980                if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 981                        return 0;
 982                break;
 983        default:
 984                break;
 985        }
 986        return -EINVAL;
 987}
 988
 989static void v4l_sanitize_format(struct v4l2_format *fmt)
 990{
 991        unsigned int offset;
 992
 993        /* Make sure num_planes is not bogus */
 994        if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
 995            fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 996                fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
 997                                               VIDEO_MAX_PLANES);
 998
 999        /*
1000         * The v4l2_pix_format structure has been extended with fields that were
1001         * not previously required to be set to zero by applications. The priv
1002         * field, when set to a magic value, indicates the the extended fields
1003         * are valid. Otherwise they will contain undefined values. To simplify
1004         * the API towards drivers zero the extended fields and set the priv
1005         * field to the magic value when the extended pixel format structure
1006         * isn't used by applications.
1007         */
1008
1009        if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1010            fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1011                return;
1012
1013        if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1014                return;
1015
1016        fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1017
1018        offset = offsetof(struct v4l2_pix_format, priv)
1019               + sizeof(fmt->fmt.pix.priv);
1020        memset(((void *)&fmt->fmt.pix) + offset, 0,
1021               sizeof(fmt->fmt.pix) - offset);
1022}
1023
1024static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1025                                struct file *file, void *fh, void *arg)
1026{
1027        struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1028        struct video_device *vfd = video_devdata(file);
1029        int ret;
1030
1031        cap->version = LINUX_VERSION_CODE;
1032        cap->device_caps = vfd->device_caps;
1033        cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1034
1035        ret = ops->vidioc_querycap(file, fh, cap);
1036
1037        /*
1038         * Drivers must not change device_caps, so check for this and
1039         * warn if this happened.
1040         */
1041        WARN_ON(cap->device_caps != vfd->device_caps);
1042        /*
1043         * Check that capabilities is a superset of
1044         * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1045         */
1046        WARN_ON((cap->capabilities &
1047                 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1048                (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1049        cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1050        cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1051
1052        return ret;
1053}
1054
1055static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1056                       struct file *file, void *fh, void *arg)
1057{
1058        struct video_device *vfd = video_devdata(file);
1059
1060        if (vfd->device_caps & V4L2_CAP_IO_MC) {
1061                *(int *)arg = 0;
1062                return 0;
1063        }
1064
1065        return ops->vidioc_g_input(file, fh, arg);
1066}
1067
1068static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1069                        struct file *file, void *fh, void *arg)
1070{
1071        struct video_device *vfd = video_devdata(file);
1072
1073        if (vfd->device_caps & V4L2_CAP_IO_MC) {
1074                *(int *)arg = 0;
1075                return 0;
1076        }
1077
1078        return ops->vidioc_g_output(file, fh, arg);
1079}
1080
1081static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1082                                struct file *file, void *fh, void *arg)
1083{
1084        struct video_device *vfd = video_devdata(file);
1085        int ret;
1086
1087        ret = v4l_enable_media_source(vfd);
1088        if (ret)
1089                return ret;
1090
1091        if (vfd->device_caps & V4L2_CAP_IO_MC)
1092                return  *(int *)arg ? -EINVAL : 0;
1093
1094        return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1095}
1096
1097static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1098                                struct file *file, void *fh, void *arg)
1099{
1100        struct video_device *vfd = video_devdata(file);
1101
1102        if (vfd->device_caps & V4L2_CAP_IO_MC)
1103                return  *(int *)arg ? -EINVAL : 0;
1104
1105        return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1106}
1107
1108static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1109                                struct file *file, void *fh, void *arg)
1110{
1111        struct video_device *vfd;
1112        u32 *p = arg;
1113
1114        vfd = video_devdata(file);
1115        *p = v4l2_prio_max(vfd->prio);
1116        return 0;
1117}
1118
1119static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1120                                struct file *file, void *fh, void *arg)
1121{
1122        struct video_device *vfd;
1123        struct v4l2_fh *vfh;
1124        u32 *p = arg;
1125
1126        vfd = video_devdata(file);
1127        if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1128                return -ENOTTY;
1129        vfh = file->private_data;
1130        return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1131}
1132
1133static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1134                                struct file *file, void *fh, void *arg)
1135{
1136        struct video_device *vfd = video_devdata(file);
1137        struct v4l2_input *p = arg;
1138
1139        /*
1140         * We set the flags for CAP_DV_TIMINGS &
1141         * CAP_STD here based on ioctl handler provided by the
1142         * driver. If the driver doesn't support these
1143         * for a specific input, it must override these flags.
1144         */
1145        if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1146                p->capabilities |= V4L2_IN_CAP_STD;
1147
1148        if (vfd->device_caps & V4L2_CAP_IO_MC) {
1149                if (p->index)
1150                        return -EINVAL;
1151                strscpy(p->name, vfd->name, sizeof(p->name));
1152                p->type = V4L2_INPUT_TYPE_CAMERA;
1153                return 0;
1154        }
1155
1156        return ops->vidioc_enum_input(file, fh, p);
1157}
1158
1159static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1160                                struct file *file, void *fh, void *arg)
1161{
1162        struct video_device *vfd = video_devdata(file);
1163        struct v4l2_output *p = arg;
1164
1165        /*
1166         * We set the flags for CAP_DV_TIMINGS &
1167         * CAP_STD here based on ioctl handler provided by the
1168         * driver. If the driver doesn't support these
1169         * for a specific output, it must override these flags.
1170         */
1171        if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1172                p->capabilities |= V4L2_OUT_CAP_STD;
1173
1174        if (vfd->device_caps & V4L2_CAP_IO_MC) {
1175                if (p->index)
1176                        return -EINVAL;
1177                strscpy(p->name, vfd->name, sizeof(p->name));
1178                p->type = V4L2_OUTPUT_TYPE_ANALOG;
1179                return 0;
1180        }
1181
1182        return ops->vidioc_enum_output(file, fh, p);
1183}
1184
1185static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1186{
1187        const unsigned sz = sizeof(fmt->description);
1188        const char *descr = NULL;
1189        u32 flags = 0;
1190
1191        /*
1192         * We depart from the normal coding style here since the descriptions
1193         * should be aligned so it is easy to see which descriptions will be
1194         * longer than 31 characters (the max length for a description).
1195         * And frankly, this is easier to read anyway.
1196         *
1197         * Note that gcc will use O(log N) comparisons to find the right case.
1198         */
1199        switch (fmt->pixelformat) {
1200        /* Max description length mask: descr = "0123456789012345678901234567890" */
1201        case V4L2_PIX_FMT_RGB332:       descr = "8-bit RGB 3-3-2"; break;
1202        case V4L2_PIX_FMT_RGB444:       descr = "16-bit A/XRGB 4-4-4-4"; break;
1203        case V4L2_PIX_FMT_ARGB444:      descr = "16-bit ARGB 4-4-4-4"; break;
1204        case V4L2_PIX_FMT_XRGB444:      descr = "16-bit XRGB 4-4-4-4"; break;
1205        case V4L2_PIX_FMT_RGBA444:      descr = "16-bit RGBA 4-4-4-4"; break;
1206        case V4L2_PIX_FMT_RGBX444:      descr = "16-bit RGBX 4-4-4-4"; break;
1207        case V4L2_PIX_FMT_ABGR444:      descr = "16-bit ABGR 4-4-4-4"; break;
1208        case V4L2_PIX_FMT_XBGR444:      descr = "16-bit XBGR 4-4-4-4"; break;
1209        case V4L2_PIX_FMT_BGRA444:      descr = "16-bit BGRA 4-4-4-4"; break;
1210        case V4L2_PIX_FMT_BGRX444:      descr = "16-bit BGRX 4-4-4-4"; break;
1211        case V4L2_PIX_FMT_RGB555:       descr = "16-bit A/XRGB 1-5-5-5"; break;
1212        case V4L2_PIX_FMT_ARGB555:      descr = "16-bit ARGB 1-5-5-5"; break;
1213        case V4L2_PIX_FMT_XRGB555:      descr = "16-bit XRGB 1-5-5-5"; break;
1214        case V4L2_PIX_FMT_ABGR555:      descr = "16-bit ABGR 1-5-5-5"; break;
1215        case V4L2_PIX_FMT_XBGR555:      descr = "16-bit XBGR 1-5-5-5"; break;
1216        case V4L2_PIX_FMT_RGBA555:      descr = "16-bit RGBA 5-5-5-1"; break;
1217        case V4L2_PIX_FMT_RGBX555:      descr = "16-bit RGBX 5-5-5-1"; break;
1218        case V4L2_PIX_FMT_BGRA555:      descr = "16-bit BGRA 5-5-5-1"; break;
1219        case V4L2_PIX_FMT_BGRX555:      descr = "16-bit BGRX 5-5-5-1"; break;
1220        case V4L2_PIX_FMT_RGB565:       descr = "16-bit RGB 5-6-5"; break;
1221        case V4L2_PIX_FMT_RGB555X:      descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1222        case V4L2_PIX_FMT_ARGB555X:     descr = "16-bit ARGB 1-5-5-5 BE"; break;
1223        case V4L2_PIX_FMT_XRGB555X:     descr = "16-bit XRGB 1-5-5-5 BE"; break;
1224        case V4L2_PIX_FMT_RGB565X:      descr = "16-bit RGB 5-6-5 BE"; break;
1225        case V4L2_PIX_FMT_BGR666:       descr = "18-bit BGRX 6-6-6-14"; break;
1226        case V4L2_PIX_FMT_BGR24:        descr = "24-bit BGR 8-8-8"; break;
1227        case V4L2_PIX_FMT_RGB24:        descr = "24-bit RGB 8-8-8"; break;
1228        case V4L2_PIX_FMT_BGR32:        descr = "32-bit BGRA/X 8-8-8-8"; break;
1229        case V4L2_PIX_FMT_ABGR32:       descr = "32-bit BGRA 8-8-8-8"; break;
1230        case V4L2_PIX_FMT_XBGR32:       descr = "32-bit BGRX 8-8-8-8"; break;
1231        case V4L2_PIX_FMT_RGB32:        descr = "32-bit A/XRGB 8-8-8-8"; break;
1232        case V4L2_PIX_FMT_ARGB32:       descr = "32-bit ARGB 8-8-8-8"; break;
1233        case V4L2_PIX_FMT_XRGB32:       descr = "32-bit XRGB 8-8-8-8"; break;
1234        case V4L2_PIX_FMT_BGRA32:       descr = "32-bit ABGR 8-8-8-8"; break;
1235        case V4L2_PIX_FMT_BGRX32:       descr = "32-bit XBGR 8-8-8-8"; break;
1236        case V4L2_PIX_FMT_RGBA32:       descr = "32-bit RGBA 8-8-8-8"; break;
1237        case V4L2_PIX_FMT_RGBX32:       descr = "32-bit RGBX 8-8-8-8"; break;
1238        case V4L2_PIX_FMT_GREY:         descr = "8-bit Greyscale"; break;
1239        case V4L2_PIX_FMT_Y4:           descr = "4-bit Greyscale"; break;
1240        case V4L2_PIX_FMT_Y6:           descr = "6-bit Greyscale"; break;
1241        case V4L2_PIX_FMT_Y10:          descr = "10-bit Greyscale"; break;
1242        case V4L2_PIX_FMT_Y12:          descr = "12-bit Greyscale"; break;
1243        case V4L2_PIX_FMT_Y14:          descr = "14-bit Greyscale"; break;
1244        case V4L2_PIX_FMT_Y16:          descr = "16-bit Greyscale"; break;
1245        case V4L2_PIX_FMT_Y16_BE:       descr = "16-bit Greyscale BE"; break;
1246        case V4L2_PIX_FMT_Y10BPACK:     descr = "10-bit Greyscale (Packed)"; break;
1247        case V4L2_PIX_FMT_Y10P:         descr = "10-bit Greyscale (MIPI Packed)"; break;
1248        case V4L2_PIX_FMT_Y8I:          descr = "Interleaved 8-bit Greyscale"; break;
1249        case V4L2_PIX_FMT_Y12I:         descr = "Interleaved 12-bit Greyscale"; break;
1250        case V4L2_PIX_FMT_Z16:          descr = "16-bit Depth"; break;
1251        case V4L2_PIX_FMT_INZI:         descr = "Planar 10:16 Greyscale Depth"; break;
1252        case V4L2_PIX_FMT_CNF4:         descr = "4-bit Depth Confidence (Packed)"; break;
1253        case V4L2_PIX_FMT_PAL8:         descr = "8-bit Palette"; break;
1254        case V4L2_PIX_FMT_UV8:          descr = "8-bit Chrominance UV 4-4"; break;
1255        case V4L2_PIX_FMT_YVU410:       descr = "Planar YVU 4:1:0"; break;
1256        case V4L2_PIX_FMT_YVU420:       descr = "Planar YVU 4:2:0"; break;
1257        case V4L2_PIX_FMT_YUYV:         descr = "YUYV 4:2:2"; break;
1258        case V4L2_PIX_FMT_YYUV:         descr = "YYUV 4:2:2"; break;
1259        case V4L2_PIX_FMT_YVYU:         descr = "YVYU 4:2:2"; break;
1260        case V4L2_PIX_FMT_UYVY:         descr = "UYVY 4:2:2"; break;
1261        case V4L2_PIX_FMT_VYUY:         descr = "VYUY 4:2:2"; break;
1262        case V4L2_PIX_FMT_YUV422P:      descr = "Planar YUV 4:2:2"; break;
1263        case V4L2_PIX_FMT_YUV411P:      descr = "Planar YUV 4:1:1"; break;
1264        case V4L2_PIX_FMT_Y41P:         descr = "YUV 4:1:1 (Packed)"; break;
1265        case V4L2_PIX_FMT_YUV444:       descr = "16-bit A/XYUV 4-4-4-4"; break;
1266        case V4L2_PIX_FMT_YUV555:       descr = "16-bit A/XYUV 1-5-5-5"; break;
1267        case V4L2_PIX_FMT_YUV565:       descr = "16-bit YUV 5-6-5"; break;
1268        case V4L2_PIX_FMT_YUV24:        descr = "24-bit YUV 4:4:4 8-8-8"; break;
1269        case V4L2_PIX_FMT_YUV32:        descr = "32-bit A/XYUV 8-8-8-8"; break;
1270        case V4L2_PIX_FMT_AYUV32:       descr = "32-bit AYUV 8-8-8-8"; break;
1271        case V4L2_PIX_FMT_XYUV32:       descr = "32-bit XYUV 8-8-8-8"; break;
1272        case V4L2_PIX_FMT_VUYA32:       descr = "32-bit VUYA 8-8-8-8"; break;
1273        case V4L2_PIX_FMT_VUYX32:       descr = "32-bit VUYX 8-8-8-8"; break;
1274        case V4L2_PIX_FMT_YUV410:       descr = "Planar YUV 4:1:0"; break;
1275        case V4L2_PIX_FMT_YUV420:       descr = "Planar YUV 4:2:0"; break;
1276        case V4L2_PIX_FMT_HI240:        descr = "8-bit Dithered RGB (BTTV)"; break;
1277        case V4L2_PIX_FMT_HM12:         descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1278        case V4L2_PIX_FMT_M420:         descr = "YUV 4:2:0 (M420)"; break;
1279        case V4L2_PIX_FMT_NV12:         descr = "Y/CbCr 4:2:0"; break;
1280        case V4L2_PIX_FMT_NV21:         descr = "Y/CrCb 4:2:0"; break;
1281        case V4L2_PIX_FMT_NV16:         descr = "Y/CbCr 4:2:2"; break;
1282        case V4L2_PIX_FMT_NV61:         descr = "Y/CrCb 4:2:2"; break;
1283        case V4L2_PIX_FMT_NV24:         descr = "Y/CbCr 4:4:4"; break;
1284        case V4L2_PIX_FMT_NV42:         descr = "Y/CrCb 4:4:4"; break;
1285        case V4L2_PIX_FMT_NV12M:        descr = "Y/CbCr 4:2:0 (N-C)"; break;
1286        case V4L2_PIX_FMT_NV21M:        descr = "Y/CrCb 4:2:0 (N-C)"; break;
1287        case V4L2_PIX_FMT_NV16M:        descr = "Y/CbCr 4:2:2 (N-C)"; break;
1288        case V4L2_PIX_FMT_NV61M:        descr = "Y/CrCb 4:2:2 (N-C)"; break;
1289        case V4L2_PIX_FMT_NV12MT:       descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1290        case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1291        case V4L2_PIX_FMT_YUV420M:      descr = "Planar YUV 4:2:0 (N-C)"; break;
1292        case V4L2_PIX_FMT_YVU420M:      descr = "Planar YVU 4:2:0 (N-C)"; break;
1293        case V4L2_PIX_FMT_YUV422M:      descr = "Planar YUV 4:2:2 (N-C)"; break;
1294        case V4L2_PIX_FMT_YVU422M:      descr = "Planar YVU 4:2:2 (N-C)"; break;
1295        case V4L2_PIX_FMT_YUV444M:      descr = "Planar YUV 4:4:4 (N-C)"; break;
1296        case V4L2_PIX_FMT_YVU444M:      descr = "Planar YVU 4:4:4 (N-C)"; break;
1297        case V4L2_PIX_FMT_SBGGR8:       descr = "8-bit Bayer BGBG/GRGR"; break;
1298        case V4L2_PIX_FMT_SGBRG8:       descr = "8-bit Bayer GBGB/RGRG"; break;
1299        case V4L2_PIX_FMT_SGRBG8:       descr = "8-bit Bayer GRGR/BGBG"; break;
1300        case V4L2_PIX_FMT_SRGGB8:       descr = "8-bit Bayer RGRG/GBGB"; break;
1301        case V4L2_PIX_FMT_SBGGR10:      descr = "10-bit Bayer BGBG/GRGR"; break;
1302        case V4L2_PIX_FMT_SGBRG10:      descr = "10-bit Bayer GBGB/RGRG"; break;
1303        case V4L2_PIX_FMT_SGRBG10:      descr = "10-bit Bayer GRGR/BGBG"; break;
1304        case V4L2_PIX_FMT_SRGGB10:      descr = "10-bit Bayer RGRG/GBGB"; break;
1305        case V4L2_PIX_FMT_SBGGR10P:     descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1306        case V4L2_PIX_FMT_SGBRG10P:     descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1307        case V4L2_PIX_FMT_SGRBG10P:     descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1308        case V4L2_PIX_FMT_SRGGB10P:     descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1309        case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1310        case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1311        case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1312        case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1313        case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1314        case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1315        case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1316        case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1317        case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1318        case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1319        case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1320        case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1321        case V4L2_PIX_FMT_SBGGR12:      descr = "12-bit Bayer BGBG/GRGR"; break;
1322        case V4L2_PIX_FMT_SGBRG12:      descr = "12-bit Bayer GBGB/RGRG"; break;
1323        case V4L2_PIX_FMT_SGRBG12:      descr = "12-bit Bayer GRGR/BGBG"; break;
1324        case V4L2_PIX_FMT_SRGGB12:      descr = "12-bit Bayer RGRG/GBGB"; break;
1325        case V4L2_PIX_FMT_SBGGR12P:     descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1326        case V4L2_PIX_FMT_SGBRG12P:     descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1327        case V4L2_PIX_FMT_SGRBG12P:     descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1328        case V4L2_PIX_FMT_SRGGB12P:     descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1329        case V4L2_PIX_FMT_SBGGR14:      descr = "14-bit Bayer BGBG/GRGR"; break;
1330        case V4L2_PIX_FMT_SGBRG14:      descr = "14-bit Bayer GBGB/RGRG"; break;
1331        case V4L2_PIX_FMT_SGRBG14:      descr = "14-bit Bayer GRGR/BGBG"; break;
1332        case V4L2_PIX_FMT_SRGGB14:      descr = "14-bit Bayer RGRG/GBGB"; break;
1333        case V4L2_PIX_FMT_SBGGR14P:     descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1334        case V4L2_PIX_FMT_SGBRG14P:     descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1335        case V4L2_PIX_FMT_SGRBG14P:     descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1336        case V4L2_PIX_FMT_SRGGB14P:     descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1337        case V4L2_PIX_FMT_SBGGR16:      descr = "16-bit Bayer BGBG/GRGR"; break;
1338        case V4L2_PIX_FMT_SGBRG16:      descr = "16-bit Bayer GBGB/RGRG"; break;
1339        case V4L2_PIX_FMT_SGRBG16:      descr = "16-bit Bayer GRGR/BGBG"; break;
1340        case V4L2_PIX_FMT_SRGGB16:      descr = "16-bit Bayer RGRG/GBGB"; break;
1341        case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1342        case V4L2_PIX_FMT_SPCA501:      descr = "GSPCA SPCA501"; break;
1343        case V4L2_PIX_FMT_SPCA505:      descr = "GSPCA SPCA505"; break;
1344        case V4L2_PIX_FMT_SPCA508:      descr = "GSPCA SPCA508"; break;
1345        case V4L2_PIX_FMT_STV0680:      descr = "GSPCA STV0680"; break;
1346        case V4L2_PIX_FMT_TM6000:       descr = "A/V + VBI Mux Packet"; break;
1347        case V4L2_PIX_FMT_CIT_YYVYUY:   descr = "GSPCA CIT YYVYUY"; break;
1348        case V4L2_PIX_FMT_KONICA420:    descr = "GSPCA KONICA420"; break;
1349        case V4L2_PIX_FMT_HSV24:        descr = "24-bit HSV 8-8-8"; break;
1350        case V4L2_PIX_FMT_HSV32:        descr = "32-bit XHSV 8-8-8-8"; break;
1351        case V4L2_SDR_FMT_CU8:          descr = "Complex U8"; break;
1352        case V4L2_SDR_FMT_CU16LE:       descr = "Complex U16LE"; break;
1353        case V4L2_SDR_FMT_CS8:          descr = "Complex S8"; break;
1354        case V4L2_SDR_FMT_CS14LE:       descr = "Complex S14LE"; break;
1355        case V4L2_SDR_FMT_RU12LE:       descr = "Real U12LE"; break;
1356        case V4L2_SDR_FMT_PCU16BE:      descr = "Planar Complex U16BE"; break;
1357        case V4L2_SDR_FMT_PCU18BE:      descr = "Planar Complex U18BE"; break;
1358        case V4L2_SDR_FMT_PCU20BE:      descr = "Planar Complex U20BE"; break;
1359        case V4L2_TCH_FMT_DELTA_TD16:   descr = "16-bit Signed Deltas"; break;
1360        case V4L2_TCH_FMT_DELTA_TD08:   descr = "8-bit Signed Deltas"; break;
1361        case V4L2_TCH_FMT_TU16:         descr = "16-bit Unsigned Touch Data"; break;
1362        case V4L2_TCH_FMT_TU08:         descr = "8-bit Unsigned Touch Data"; break;
1363        case V4L2_META_FMT_VSP1_HGO:    descr = "R-Car VSP1 1-D Histogram"; break;
1364        case V4L2_META_FMT_VSP1_HGT:    descr = "R-Car VSP1 2-D Histogram"; break;
1365        case V4L2_META_FMT_UVC:         descr = "UVC Payload Header Metadata"; break;
1366        case V4L2_META_FMT_D4XX:        descr = "Intel D4xx UVC Metadata"; break;
1367        case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1368        case V4L2_META_FMT_RK_ISP1_PARAMS:      descr = "Rockchip ISP1 3A Parameters"; break;
1369        case V4L2_META_FMT_RK_ISP1_STAT_3A:     descr = "Rockchip ISP1 3A Statistics"; break;
1370
1371        default:
1372                /* Compressed formats */
1373                flags = V4L2_FMT_FLAG_COMPRESSED;
1374                switch (fmt->pixelformat) {
1375                /* Max description length mask: descr = "0123456789012345678901234567890" */
1376                case V4L2_PIX_FMT_MJPEG:        descr = "Motion-JPEG"; break;
1377                case V4L2_PIX_FMT_JPEG:         descr = "JFIF JPEG"; break;
1378                case V4L2_PIX_FMT_DV:           descr = "1394"; break;
1379                case V4L2_PIX_FMT_MPEG:         descr = "MPEG-1/2/4"; break;
1380                case V4L2_PIX_FMT_H264:         descr = "H.264"; break;
1381                case V4L2_PIX_FMT_H264_NO_SC:   descr = "H.264 (No Start Codes)"; break;
1382                case V4L2_PIX_FMT_H264_MVC:     descr = "H.264 MVC"; break;
1383                case V4L2_PIX_FMT_H264_SLICE:   descr = "H.264 Parsed Slice Data"; break;
1384                case V4L2_PIX_FMT_H263:         descr = "H.263"; break;
1385                case V4L2_PIX_FMT_MPEG1:        descr = "MPEG-1 ES"; break;
1386                case V4L2_PIX_FMT_MPEG2:        descr = "MPEG-2 ES"; break;
1387                case V4L2_PIX_FMT_MPEG2_SLICE:  descr = "MPEG-2 Parsed Slice Data"; break;
1388                case V4L2_PIX_FMT_MPEG4:        descr = "MPEG-4 Part 2 ES"; break;
1389                case V4L2_PIX_FMT_XVID:         descr = "Xvid"; break;
1390                case V4L2_PIX_FMT_VC1_ANNEX_G:  descr = "VC-1 (SMPTE 412M Annex G)"; break;
1391                case V4L2_PIX_FMT_VC1_ANNEX_L:  descr = "VC-1 (SMPTE 412M Annex L)"; break;
1392                case V4L2_PIX_FMT_VP8:          descr = "VP8"; break;
1393                case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1394                case V4L2_PIX_FMT_VP9:          descr = "VP9"; break;
1395                case V4L2_PIX_FMT_HEVC:         descr = "HEVC"; break; /* aka H.265 */
1396                case V4L2_PIX_FMT_HEVC_SLICE:   descr = "HEVC Parsed Slice Data"; break;
1397                case V4L2_PIX_FMT_FWHT:         descr = "FWHT"; break; /* used in vicodec */
1398                case V4L2_PIX_FMT_FWHT_STATELESS:       descr = "FWHT Stateless"; break; /* used in vicodec */
1399                case V4L2_PIX_FMT_CPIA1:        descr = "GSPCA CPiA YUV"; break;
1400                case V4L2_PIX_FMT_WNVA:         descr = "WNVA"; break;
1401                case V4L2_PIX_FMT_SN9C10X:      descr = "GSPCA SN9C10X"; break;
1402                case V4L2_PIX_FMT_PWC1:         descr = "Raw Philips Webcam Type (Old)"; break;
1403                case V4L2_PIX_FMT_PWC2:         descr = "Raw Philips Webcam Type (New)"; break;
1404                case V4L2_PIX_FMT_ET61X251:     descr = "GSPCA ET61X251"; break;
1405                case V4L2_PIX_FMT_SPCA561:      descr = "GSPCA SPCA561"; break;
1406                case V4L2_PIX_FMT_PAC207:       descr = "GSPCA PAC207"; break;
1407                case V4L2_PIX_FMT_MR97310A:     descr = "GSPCA MR97310A"; break;
1408                case V4L2_PIX_FMT_JL2005BCD:    descr = "GSPCA JL2005BCD"; break;
1409                case V4L2_PIX_FMT_SN9C2028:     descr = "GSPCA SN9C2028"; break;
1410                case V4L2_PIX_FMT_SQ905C:       descr = "GSPCA SQ905C"; break;
1411                case V4L2_PIX_FMT_PJPG:         descr = "GSPCA PJPG"; break;
1412                case V4L2_PIX_FMT_OV511:        descr = "GSPCA OV511"; break;
1413                case V4L2_PIX_FMT_OV518:        descr = "GSPCA OV518"; break;
1414                case V4L2_PIX_FMT_JPGL:         descr = "JPEG Lite"; break;
1415                case V4L2_PIX_FMT_SE401:        descr = "GSPCA SE401"; break;
1416                case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1417                case V4L2_PIX_FMT_MT21C:        descr = "Mediatek Compressed Format"; break;
1418                case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1419                default:
1420                        if (fmt->description[0])
1421                                return;
1422                        WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1423                        flags = 0;
1424                        snprintf(fmt->description, sz, "%p4cc",
1425                                 &fmt->pixelformat);
1426                        break;
1427                }
1428        }
1429
1430        if (descr)
1431                WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1432        fmt->flags |= flags;
1433}
1434
1435static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1436                                struct file *file, void *fh, void *arg)
1437{
1438        struct video_device *vdev = video_devdata(file);
1439        struct v4l2_fmtdesc *p = arg;
1440        int ret = check_fmt(file, p->type);
1441        u32 mbus_code;
1442        u32 cap_mask;
1443
1444        if (ret)
1445                return ret;
1446        ret = -EINVAL;
1447
1448        if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1449                p->mbus_code = 0;
1450
1451        mbus_code = p->mbus_code;
1452        CLEAR_AFTER_FIELD(p, type);
1453        p->mbus_code = mbus_code;
1454
1455        switch (p->type) {
1456        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1457        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1458                cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1459                           V4L2_CAP_VIDEO_M2M_MPLANE;
1460                if (!!(vdev->device_caps & cap_mask) !=
1461                    (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1462                        break;
1463
1464                if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1465                        break;
1466                ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1467                break;
1468        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1469                if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1470                        break;
1471                ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1472                break;
1473        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1474        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1475                cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1476                           V4L2_CAP_VIDEO_M2M_MPLANE;
1477                if (!!(vdev->device_caps & cap_mask) !=
1478                    (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1479                        break;
1480
1481                if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1482                        break;
1483                ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1484                break;
1485        case V4L2_BUF_TYPE_SDR_CAPTURE:
1486                if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1487                        break;
1488                ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1489                break;
1490        case V4L2_BUF_TYPE_SDR_OUTPUT:
1491                if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1492                        break;
1493                ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1494                break;
1495        case V4L2_BUF_TYPE_META_CAPTURE:
1496                if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1497                        break;
1498                ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1499                break;
1500        case V4L2_BUF_TYPE_META_OUTPUT:
1501                if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1502                        break;
1503                ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1504                break;
1505        }
1506        if (ret == 0)
1507                v4l_fill_fmtdesc(p);
1508        return ret;
1509}
1510
1511static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1512{
1513        /*
1514         * The v4l2_pix_format structure contains fields that make no sense for
1515         * touch. Set them to default values in this case.
1516         */
1517
1518        p->field = V4L2_FIELD_NONE;
1519        p->colorspace = V4L2_COLORSPACE_RAW;
1520        p->flags = 0;
1521        p->ycbcr_enc = 0;
1522        p->quantization = 0;
1523        p->xfer_func = 0;
1524}
1525
1526static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1527                                struct file *file, void *fh, void *arg)
1528{
1529        struct v4l2_format *p = arg;
1530        struct video_device *vfd = video_devdata(file);
1531        int ret = check_fmt(file, p->type);
1532
1533        if (ret)
1534                return ret;
1535
1536        /*
1537         * fmt can't be cleared for these overlay types due to the 'clips'
1538         * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1539         * Those are provided by the user. So handle these two overlay types
1540         * first, and then just do a simple memset for the other types.
1541         */
1542        switch (p->type) {
1543        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1544        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1545                struct v4l2_clip *clips = p->fmt.win.clips;
1546                u32 clipcount = p->fmt.win.clipcount;
1547                void __user *bitmap = p->fmt.win.bitmap;
1548
1549                memset(&p->fmt, 0, sizeof(p->fmt));
1550                p->fmt.win.clips = clips;
1551                p->fmt.win.clipcount = clipcount;
1552                p->fmt.win.bitmap = bitmap;
1553                break;
1554        }
1555        default:
1556                memset(&p->fmt, 0, sizeof(p->fmt));
1557                break;
1558        }
1559
1560        switch (p->type) {
1561        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1562                if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1563                        break;
1564                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1565                ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1566                /* just in case the driver zeroed it again */
1567                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1568                if (vfd->vfl_type == VFL_TYPE_TOUCH)
1569                        v4l_pix_format_touch(&p->fmt.pix);
1570                return ret;
1571        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1572                return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1573        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1574                return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1575        case V4L2_BUF_TYPE_VBI_CAPTURE:
1576                return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1577        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1578                return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1579        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1580                if (unlikely(!ops->vidioc_g_fmt_vid_out))
1581                        break;
1582                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1583                ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1584                /* just in case the driver zeroed it again */
1585                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1586                return ret;
1587        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1588                return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1589        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1590                return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1591        case V4L2_BUF_TYPE_VBI_OUTPUT:
1592                return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1593        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1594                return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1595        case V4L2_BUF_TYPE_SDR_CAPTURE:
1596                return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1597        case V4L2_BUF_TYPE_SDR_OUTPUT:
1598                return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1599        case V4L2_BUF_TYPE_META_CAPTURE:
1600                return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1601        case V4L2_BUF_TYPE_META_OUTPUT:
1602                return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1603        }
1604        return -EINVAL;
1605}
1606
1607static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1608                                struct file *file, void *fh, void *arg)
1609{
1610        struct v4l2_format *p = arg;
1611        struct video_device *vfd = video_devdata(file);
1612        int ret = check_fmt(file, p->type);
1613        unsigned int i;
1614
1615        if (ret)
1616                return ret;
1617
1618        ret = v4l_enable_media_source(vfd);
1619        if (ret)
1620                return ret;
1621        v4l_sanitize_format(p);
1622
1623        switch (p->type) {
1624        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1625                if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1626                        break;
1627                CLEAR_AFTER_FIELD(p, fmt.pix);
1628                ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1629                /* just in case the driver zeroed it again */
1630                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1631                if (vfd->vfl_type == VFL_TYPE_TOUCH)
1632                        v4l_pix_format_touch(&p->fmt.pix);
1633                return ret;
1634        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1635                if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1636                        break;
1637                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1638                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1639                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1640                                          bytesperline);
1641                return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1642        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1643                if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1644                        break;
1645                CLEAR_AFTER_FIELD(p, fmt.win);
1646                return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1647        case V4L2_BUF_TYPE_VBI_CAPTURE:
1648                if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1649                        break;
1650                CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1651                return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1652        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1653                if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1654                        break;
1655                CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1656                return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1657        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1658                if (unlikely(!ops->vidioc_s_fmt_vid_out))
1659                        break;
1660                CLEAR_AFTER_FIELD(p, fmt.pix);
1661                ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1662                /* just in case the driver zeroed it again */
1663                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1664                return ret;
1665        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1666                if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1667                        break;
1668                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1669                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1670                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1671                                          bytesperline);
1672                return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1673        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1674                if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1675                        break;
1676                CLEAR_AFTER_FIELD(p, fmt.win);
1677                return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1678        case V4L2_BUF_TYPE_VBI_OUTPUT:
1679                if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1680                        break;
1681                CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1682                return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1683        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1684                if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1685                        break;
1686                CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1687                return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1688        case V4L2_BUF_TYPE_SDR_CAPTURE:
1689                if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1690                        break;
1691                CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1692                return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1693        case V4L2_BUF_TYPE_SDR_OUTPUT:
1694                if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1695                        break;
1696                CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1697                return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1698        case V4L2_BUF_TYPE_META_CAPTURE:
1699                if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1700                        break;
1701                CLEAR_AFTER_FIELD(p, fmt.meta);
1702                return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1703        case V4L2_BUF_TYPE_META_OUTPUT:
1704                if (unlikely(!ops->vidioc_s_fmt_meta_out))
1705                        break;
1706                CLEAR_AFTER_FIELD(p, fmt.meta);
1707                return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1708        }
1709        return -EINVAL;
1710}
1711
1712static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1713                                struct file *file, void *fh, void *arg)
1714{
1715        struct v4l2_format *p = arg;
1716        struct video_device *vfd = video_devdata(file);
1717        int ret = check_fmt(file, p->type);
1718        unsigned int i;
1719
1720        if (ret)
1721                return ret;
1722
1723        v4l_sanitize_format(p);
1724
1725        switch (p->type) {
1726        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1727                if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1728                        break;
1729                CLEAR_AFTER_FIELD(p, fmt.pix);
1730                ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1731                /* just in case the driver zeroed it again */
1732                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1733                if (vfd->vfl_type == VFL_TYPE_TOUCH)
1734                        v4l_pix_format_touch(&p->fmt.pix);
1735                return ret;
1736        case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1737                if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1738                        break;
1739                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1740                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1741                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1742                                          bytesperline);
1743                return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1744        case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1745                if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1746                        break;
1747                CLEAR_AFTER_FIELD(p, fmt.win);
1748                return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1749        case V4L2_BUF_TYPE_VBI_CAPTURE:
1750                if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1751                        break;
1752                CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1753                return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1754        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1755                if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1756                        break;
1757                CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1758                return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1759        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1760                if (unlikely(!ops->vidioc_try_fmt_vid_out))
1761                        break;
1762                CLEAR_AFTER_FIELD(p, fmt.pix);
1763                ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1764                /* just in case the driver zeroed it again */
1765                p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1766                return ret;
1767        case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1768                if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1769                        break;
1770                CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1771                for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1772                        CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1773                                          bytesperline);
1774                return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1775        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1776                if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1777                        break;
1778                CLEAR_AFTER_FIELD(p, fmt.win);
1779                return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1780        case V4L2_BUF_TYPE_VBI_OUTPUT:
1781                if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1782                        break;
1783                CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1784                return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1785        case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1786                if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1787                        break;
1788                CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1789                return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1790        case V4L2_BUF_TYPE_SDR_CAPTURE:
1791                if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1792                        break;
1793                CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1794                return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1795        case V4L2_BUF_TYPE_SDR_OUTPUT:
1796                if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1797                        break;
1798                CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1799                return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1800        case V4L2_BUF_TYPE_META_CAPTURE:
1801                if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1802                        break;
1803                CLEAR_AFTER_FIELD(p, fmt.meta);
1804                return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1805        case V4L2_BUF_TYPE_META_OUTPUT:
1806                if (unlikely(!ops->vidioc_try_fmt_meta_out))
1807                        break;
1808                CLEAR_AFTER_FIELD(p, fmt.meta);
1809                return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1810        }
1811        return -EINVAL;
1812}
1813
1814static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1815                                struct file *file, void *fh, void *arg)
1816{
1817        return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1818}
1819
1820static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1821                                struct file *file, void *fh, void *arg)
1822{
1823        return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1824}
1825
1826static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1827                                struct file *file, void *fh, void *arg)
1828{
1829        struct video_device *vfd = video_devdata(file);
1830        struct v4l2_tuner *p = arg;
1831        int err;
1832
1833        p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1834                        V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1835        err = ops->vidioc_g_tuner(file, fh, p);
1836        if (!err)
1837                p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1838        return err;
1839}
1840
1841static int v4l_s_tuner(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_tuner *p = arg;
1846        int ret;
1847
1848        ret = v4l_enable_media_source(vfd);
1849        if (ret)
1850                return ret;
1851        p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1852                        V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1853        return ops->vidioc_s_tuner(file, fh, p);
1854}
1855
1856static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1857                                struct file *file, void *fh, void *arg)
1858{
1859        struct video_device *vfd = video_devdata(file);
1860        struct v4l2_modulator *p = arg;
1861        int err;
1862
1863        if (vfd->vfl_type == VFL_TYPE_RADIO)
1864                p->type = V4L2_TUNER_RADIO;
1865
1866        err = ops->vidioc_g_modulator(file, fh, p);
1867        if (!err)
1868                p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1869        return err;
1870}
1871
1872static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1873                                struct file *file, void *fh, void *arg)
1874{
1875        struct video_device *vfd = video_devdata(file);
1876        struct v4l2_modulator *p = arg;
1877
1878        if (vfd->vfl_type == VFL_TYPE_RADIO)
1879                p->type = V4L2_TUNER_RADIO;
1880
1881        return ops->vidioc_s_modulator(file, fh, p);
1882}
1883
1884static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1885                                struct file *file, void *fh, void *arg)
1886{
1887        struct video_device *vfd = video_devdata(file);
1888        struct v4l2_frequency *p = arg;
1889
1890        if (vfd->vfl_type == VFL_TYPE_SDR)
1891                p->type = V4L2_TUNER_SDR;
1892        else
1893                p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1894                                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1895        return ops->vidioc_g_frequency(file, fh, p);
1896}
1897
1898static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1899                                struct file *file, void *fh, void *arg)
1900{
1901        struct video_device *vfd = video_devdata(file);
1902        const struct v4l2_frequency *p = arg;
1903        enum v4l2_tuner_type type;
1904        int ret;
1905
1906        ret = v4l_enable_media_source(vfd);
1907        if (ret)
1908                return ret;
1909        if (vfd->vfl_type == VFL_TYPE_SDR) {
1910                if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1911                        return -EINVAL;
1912        } else {
1913                type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1914                                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1915                if (type != p->type)
1916                        return -EINVAL;
1917        }
1918        return ops->vidioc_s_frequency(file, fh, p);
1919}
1920
1921static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1922                                struct file *file, void *fh, void *arg)
1923{
1924        struct video_device *vfd = video_devdata(file);
1925        struct v4l2_standard *p = arg;
1926
1927        return v4l_video_std_enumstd(p, vfd->tvnorms);
1928}
1929
1930static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1931                                struct file *file, void *fh, void *arg)
1932{
1933        struct video_device *vfd = video_devdata(file);
1934        v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1935        int ret;
1936
1937        ret = v4l_enable_media_source(vfd);
1938        if (ret)
1939                return ret;
1940        norm = id & vfd->tvnorms;
1941        if (vfd->tvnorms && !norm)      /* Check if std is supported */
1942                return -EINVAL;
1943
1944        /* Calls the specific handler */
1945        return ops->vidioc_s_std(file, fh, norm);
1946}
1947
1948static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1949                                struct file *file, void *fh, void *arg)
1950{
1951        struct video_device *vfd = video_devdata(file);
1952        v4l2_std_id *p = arg;
1953        int ret;
1954
1955        ret = v4l_enable_media_source(vfd);
1956        if (ret)
1957                return ret;
1958        /*
1959         * If no signal is detected, then the driver should return
1960         * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1961         * any standards that do not apply removed.
1962         *
1963         * This means that tuners, audio and video decoders can join
1964         * their efforts to improve the standards detection.
1965         */
1966        *p = vfd->tvnorms;
1967        return ops->vidioc_querystd(file, fh, arg);
1968}
1969
1970static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1971                                struct file *file, void *fh, void *arg)
1972{
1973        struct video_device *vfd = video_devdata(file);
1974        struct v4l2_hw_freq_seek *p = arg;
1975        enum v4l2_tuner_type type;
1976        int ret;
1977
1978        ret = v4l_enable_media_source(vfd);
1979        if (ret)
1980                return ret;
1981        /* s_hw_freq_seek is not supported for SDR for now */
1982        if (vfd->vfl_type == VFL_TYPE_SDR)
1983                return -EINVAL;
1984
1985        type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1986                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1987        if (p->type != type)
1988                return -EINVAL;
1989        return ops->vidioc_s_hw_freq_seek(file, fh, p);
1990}
1991
1992static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1993                                struct file *file, void *fh, void *arg)
1994{
1995        return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1996}
1997
1998static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1999                                struct file *file, void *fh, void *arg)
2000{
2001        struct v4l2_requestbuffers *p = arg;
2002        int ret = check_fmt(file, p->type);
2003
2004        if (ret)
2005                return ret;
2006
2007        CLEAR_AFTER_FIELD(p, capabilities);
2008
2009        return ops->vidioc_reqbufs(file, fh, p);
2010}
2011
2012static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2013                                struct file *file, void *fh, void *arg)
2014{
2015        struct v4l2_buffer *p = arg;
2016        int ret = check_fmt(file, p->type);
2017
2018        return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2019}
2020
2021static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2022                                struct file *file, void *fh, void *arg)
2023{
2024        struct v4l2_buffer *p = arg;
2025        int ret = check_fmt(file, p->type);
2026
2027        return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2028}
2029
2030static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2031                                struct file *file, void *fh, void *arg)
2032{
2033        struct v4l2_buffer *p = arg;
2034        int ret = check_fmt(file, p->type);
2035
2036        return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2037}
2038
2039static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2040                                struct file *file, void *fh, void *arg)
2041{
2042        struct v4l2_create_buffers *create = arg;
2043        int ret = check_fmt(file, create->format.type);
2044
2045        if (ret)
2046                return ret;
2047
2048        CLEAR_AFTER_FIELD(create, capabilities);
2049
2050        v4l_sanitize_format(&create->format);
2051
2052        ret = ops->vidioc_create_bufs(file, fh, create);
2053
2054        if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2055            create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2056                create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2057
2058        return ret;
2059}
2060
2061static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2062                                struct file *file, void *fh, void *arg)
2063{
2064        struct v4l2_buffer *b = arg;
2065        int ret = check_fmt(file, b->type);
2066
2067        return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2068}
2069
2070static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2071                                struct file *file, void *fh, void *arg)
2072{
2073        struct v4l2_streamparm *p = arg;
2074        v4l2_std_id std;
2075        int ret = check_fmt(file, p->type);
2076
2077        if (ret)
2078                return ret;
2079        if (ops->vidioc_g_parm)
2080                return ops->vidioc_g_parm(file, fh, p);
2081        if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2082            p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2083                return -EINVAL;
2084        p->parm.capture.readbuffers = 2;
2085        ret = ops->vidioc_g_std(file, fh, &std);
2086        if (ret == 0)
2087                v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2088        return ret;
2089}
2090
2091static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2092                                struct file *file, void *fh, void *arg)
2093{
2094        struct v4l2_streamparm *p = arg;
2095        int ret = check_fmt(file, p->type);
2096
2097        if (ret)
2098                return ret;
2099
2100        /* Note: extendedmode is never used in drivers */
2101        if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2102                memset(p->parm.output.reserved, 0,
2103                       sizeof(p->parm.output.reserved));
2104                p->parm.output.extendedmode = 0;
2105                p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2106        } else {
2107                memset(p->parm.capture.reserved, 0,
2108                       sizeof(p->parm.capture.reserved));
2109                p->parm.capture.extendedmode = 0;
2110                p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2111        }
2112        return ops->vidioc_s_parm(file, fh, p);
2113}
2114
2115static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2116                                struct file *file, void *fh, void *arg)
2117{
2118        struct video_device *vfd = video_devdata(file);
2119        struct v4l2_queryctrl *p = arg;
2120        struct v4l2_fh *vfh =
2121                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2122
2123        if (vfh && vfh->ctrl_handler)
2124                return v4l2_queryctrl(vfh->ctrl_handler, p);
2125        if (vfd->ctrl_handler)
2126                return v4l2_queryctrl(vfd->ctrl_handler, p);
2127        if (ops->vidioc_queryctrl)
2128                return ops->vidioc_queryctrl(file, fh, p);
2129        return -ENOTTY;
2130}
2131
2132static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2133                                struct file *file, void *fh, void *arg)
2134{
2135        struct video_device *vfd = video_devdata(file);
2136        struct v4l2_query_ext_ctrl *p = arg;
2137        struct v4l2_fh *vfh =
2138                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2139
2140        if (vfh && vfh->ctrl_handler)
2141                return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2142        if (vfd->ctrl_handler)
2143                return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2144        if (ops->vidioc_query_ext_ctrl)
2145                return ops->vidioc_query_ext_ctrl(file, fh, p);
2146        return -ENOTTY;
2147}
2148
2149static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2150                                struct file *file, void *fh, void *arg)
2151{
2152        struct video_device *vfd = video_devdata(file);
2153        struct v4l2_querymenu *p = arg;
2154        struct v4l2_fh *vfh =
2155                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2156
2157        if (vfh && vfh->ctrl_handler)
2158                return v4l2_querymenu(vfh->ctrl_handler, p);
2159        if (vfd->ctrl_handler)
2160                return v4l2_querymenu(vfd->ctrl_handler, p);
2161        if (ops->vidioc_querymenu)
2162                return ops->vidioc_querymenu(file, fh, p);
2163        return -ENOTTY;
2164}
2165
2166static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2167                                struct file *file, void *fh, void *arg)
2168{
2169        struct video_device *vfd = video_devdata(file);
2170        struct v4l2_control *p = arg;
2171        struct v4l2_fh *vfh =
2172                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2173        struct v4l2_ext_controls ctrls;
2174        struct v4l2_ext_control ctrl;
2175
2176        if (vfh && vfh->ctrl_handler)
2177                return v4l2_g_ctrl(vfh->ctrl_handler, p);
2178        if (vfd->ctrl_handler)
2179                return v4l2_g_ctrl(vfd->ctrl_handler, p);
2180        if (ops->vidioc_g_ctrl)
2181                return ops->vidioc_g_ctrl(file, fh, p);
2182        if (ops->vidioc_g_ext_ctrls == NULL)
2183                return -ENOTTY;
2184
2185        ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2186        ctrls.count = 1;
2187        ctrls.controls = &ctrl;
2188        ctrl.id = p->id;
2189        ctrl.value = p->value;
2190        if (check_ext_ctrls(&ctrls, 1)) {
2191                int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2192
2193                if (ret == 0)
2194                        p->value = ctrl.value;
2195                return ret;
2196        }
2197        return -EINVAL;
2198}
2199
2200static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2201                                struct file *file, void *fh, void *arg)
2202{
2203        struct video_device *vfd = video_devdata(file);
2204        struct v4l2_control *p = arg;
2205        struct v4l2_fh *vfh =
2206                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2207        struct v4l2_ext_controls ctrls;
2208        struct v4l2_ext_control ctrl;
2209
2210        if (vfh && vfh->ctrl_handler)
2211                return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2212        if (vfd->ctrl_handler)
2213                return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2214        if (ops->vidioc_s_ctrl)
2215                return ops->vidioc_s_ctrl(file, fh, p);
2216        if (ops->vidioc_s_ext_ctrls == NULL)
2217                return -ENOTTY;
2218
2219        ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2220        ctrls.count = 1;
2221        ctrls.controls = &ctrl;
2222        ctrl.id = p->id;
2223        ctrl.value = p->value;
2224        if (check_ext_ctrls(&ctrls, 1))
2225                return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2226        return -EINVAL;
2227}
2228
2229static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2230                                struct file *file, void *fh, void *arg)
2231{
2232        struct video_device *vfd = video_devdata(file);
2233        struct v4l2_ext_controls *p = arg;
2234        struct v4l2_fh *vfh =
2235                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2236
2237        p->error_idx = p->count;
2238        if (vfh && vfh->ctrl_handler)
2239                return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2240                                        vfd, vfd->v4l2_dev->mdev, p);
2241        if (vfd->ctrl_handler)
2242                return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2243                                        vfd, vfd->v4l2_dev->mdev, p);
2244        if (ops->vidioc_g_ext_ctrls == NULL)
2245                return -ENOTTY;
2246        return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2247                                        -EINVAL;
2248}
2249
2250static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2251                                struct file *file, void *fh, void *arg)
2252{
2253        struct video_device *vfd = video_devdata(file);
2254        struct v4l2_ext_controls *p = arg;
2255        struct v4l2_fh *vfh =
2256                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2257
2258        p->error_idx = p->count;
2259        if (vfh && vfh->ctrl_handler)
2260                return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2261                                        vfd, vfd->v4l2_dev->mdev, p);
2262        if (vfd->ctrl_handler)
2263                return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2264                                        vfd, vfd->v4l2_dev->mdev, p);
2265        if (ops->vidioc_s_ext_ctrls == NULL)
2266                return -ENOTTY;
2267        return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2268                                        -EINVAL;
2269}
2270
2271static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2272                                struct file *file, void *fh, void *arg)
2273{
2274        struct video_device *vfd = video_devdata(file);
2275        struct v4l2_ext_controls *p = arg;
2276        struct v4l2_fh *vfh =
2277                test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2278
2279        p->error_idx = p->count;
2280        if (vfh && vfh->ctrl_handler)
2281                return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2282                                          vfd, vfd->v4l2_dev->mdev, p);
2283        if (vfd->ctrl_handler)
2284                return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2285                                          vfd, vfd->v4l2_dev->mdev, p);
2286        if (ops->vidioc_try_ext_ctrls == NULL)
2287                return -ENOTTY;
2288        return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2289                                        -EINVAL;
2290}
2291
2292/*
2293 * The selection API specified originally that the _MPLANE buffer types
2294 * shouldn't be used. The reasons for this are lost in the mists of time
2295 * (or just really crappy memories). Regardless, this is really annoying
2296 * for userspace. So to keep things simple we map _MPLANE buffer types
2297 * to their 'regular' counterparts before calling the driver. And we
2298 * restore it afterwards. This way applications can use either buffer
2299 * type and drivers don't need to check for both.
2300 */
2301static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2302                           struct file *file, void *fh, void *arg)
2303{
2304        struct v4l2_selection *p = arg;
2305        u32 old_type = p->type;
2306        int ret;
2307
2308        if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2309                p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2310        else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2311                p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2312        ret = ops->vidioc_g_selection(file, fh, p);
2313        p->type = old_type;
2314        return ret;
2315}
2316
2317static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2318                           struct file *file, void *fh, void *arg)
2319{
2320        struct v4l2_selection *p = arg;
2321        u32 old_type = p->type;
2322        int ret;
2323
2324        if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2325                p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2326        else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2327                p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2328        ret = ops->vidioc_s_selection(file, fh, p);
2329        p->type = old_type;
2330        return ret;
2331}
2332
2333static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2334                                struct file *file, void *fh, void *arg)
2335{
2336        struct video_device *vfd = video_devdata(file);
2337        struct v4l2_crop *p = arg;
2338        struct v4l2_selection s = {
2339                .type = p->type,
2340        };
2341        int ret;
2342
2343        /* simulate capture crop using selection api */
2344
2345        /* crop means compose for output devices */
2346        if (V4L2_TYPE_IS_OUTPUT(p->type))
2347                s.target = V4L2_SEL_TGT_COMPOSE;
2348        else
2349                s.target = V4L2_SEL_TGT_CROP;
2350
2351        if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2352                s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2353                        V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2354
2355        ret = v4l_g_selection(ops, file, fh, &s);
2356
2357        /* copying results to old structure on success */
2358        if (!ret)
2359                p->c = s.r;
2360        return ret;
2361}
2362
2363static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2364                                struct file *file, void *fh, void *arg)
2365{
2366        struct video_device *vfd = video_devdata(file);
2367        struct v4l2_crop *p = arg;
2368        struct v4l2_selection s = {
2369                .type = p->type,
2370                .r = p->c,
2371        };
2372
2373        /* simulate capture crop using selection api */
2374
2375        /* crop means compose for output devices */
2376        if (V4L2_TYPE_IS_OUTPUT(p->type))
2377                s.target = V4L2_SEL_TGT_COMPOSE;
2378        else
2379                s.target = V4L2_SEL_TGT_CROP;
2380
2381        if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2382                s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2383                        V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2384
2385        return v4l_s_selection(ops, file, fh, &s);
2386}
2387
2388static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2389                                struct file *file, void *fh, void *arg)
2390{
2391        struct video_device *vfd = video_devdata(file);
2392        struct v4l2_cropcap *p = arg;
2393        struct v4l2_selection s = { .type = p->type };
2394        int ret = 0;
2395
2396        /* setting trivial pixelaspect */
2397        p->pixelaspect.numerator = 1;
2398        p->pixelaspect.denominator = 1;
2399
2400        if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2401                s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2402        else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2403                s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2404
2405        /*
2406         * The determine_valid_ioctls() call already should ensure
2407         * that this can never happen, but just in case...
2408         */
2409        if (WARN_ON(!ops->vidioc_g_selection))
2410                return -ENOTTY;
2411
2412        if (ops->vidioc_g_pixelaspect)
2413                ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2414                                                &p->pixelaspect);
2415
2416        /*
2417         * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2418         * square pixel aspect ratio in that case.
2419         */
2420        if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2421                return ret;
2422
2423        /* Use g_selection() to fill in the bounds and defrect rectangles */
2424
2425        /* obtaining bounds */
2426        if (V4L2_TYPE_IS_OUTPUT(p->type))
2427                s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2428        else
2429                s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2430
2431        if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2432                s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2433                        V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2434
2435        ret = v4l_g_selection(ops, file, fh, &s);
2436        if (ret)
2437                return ret;
2438        p->bounds = s.r;
2439
2440        /* obtaining defrect */
2441        if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2442                s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2443        else
2444                s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2445
2446        ret = v4l_g_selection(ops, file, fh, &s);
2447        if (ret)
2448                return ret;
2449        p->defrect = s.r;
2450
2451        return 0;
2452}
2453
2454static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2455                                struct file *file, void *fh, void *arg)
2456{
2457        struct video_device *vfd = video_devdata(file);
2458        int ret;
2459
2460        if (vfd->v4l2_dev)
2461                pr_info("%s: =================  START STATUS  =================\n",
2462                        vfd->v4l2_dev->name);
2463        ret = ops->vidioc_log_status(file, fh);
2464        if (vfd->v4l2_dev)
2465                pr_info("%s: ==================  END STATUS  ==================\n",
2466                        vfd->v4l2_dev->name);
2467        return ret;
2468}
2469
2470static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2471                                struct file *file, void *fh, void *arg)
2472{
2473#ifdef CONFIG_VIDEO_ADV_DEBUG
2474        struct v4l2_dbg_register *p = arg;
2475        struct video_device *vfd = video_devdata(file);
2476        struct v4l2_subdev *sd;
2477        int idx = 0;
2478
2479        if (!capable(CAP_SYS_ADMIN))
2480                return -EPERM;
2481        if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2482                if (vfd->v4l2_dev == NULL)
2483                        return -EINVAL;
2484                v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2485                        if (p->match.addr == idx++)
2486                                return v4l2_subdev_call(sd, core, g_register, p);
2487                return -EINVAL;
2488        }
2489        if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2490            (ops->vidioc_g_chip_info || p->match.addr == 0))
2491                return ops->vidioc_g_register(file, fh, p);
2492        return -EINVAL;
2493#else
2494        return -ENOTTY;
2495#endif
2496}
2497
2498static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2499                                struct file *file, void *fh, void *arg)
2500{
2501#ifdef CONFIG_VIDEO_ADV_DEBUG
2502        const struct v4l2_dbg_register *p = arg;
2503        struct video_device *vfd = video_devdata(file);
2504        struct v4l2_subdev *sd;
2505        int idx = 0;
2506
2507        if (!capable(CAP_SYS_ADMIN))
2508                return -EPERM;
2509        if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2510                if (vfd->v4l2_dev == NULL)
2511                        return -EINVAL;
2512                v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2513                        if (p->match.addr == idx++)
2514                                return v4l2_subdev_call(sd, core, s_register, p);
2515                return -EINVAL;
2516        }
2517        if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2518            (ops->vidioc_g_chip_info || p->match.addr == 0))
2519                return ops->vidioc_s_register(file, fh, p);
2520        return -EINVAL;
2521#else
2522        return -ENOTTY;
2523#endif
2524}
2525
2526static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2527                                struct file *file, void *fh, void *arg)
2528{
2529#ifdef CONFIG_VIDEO_ADV_DEBUG
2530        struct video_device *vfd = video_devdata(file);
2531        struct v4l2_dbg_chip_info *p = arg;
2532        struct v4l2_subdev *sd;
2533        int idx = 0;
2534
2535        switch (p->match.type) {
2536        case V4L2_CHIP_MATCH_BRIDGE:
2537                if (ops->vidioc_s_register)
2538                        p->flags |= V4L2_CHIP_FL_WRITABLE;
2539                if (ops->vidioc_g_register)
2540                        p->flags |= V4L2_CHIP_FL_READABLE;
2541                strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2542                if (ops->vidioc_g_chip_info)
2543                        return ops->vidioc_g_chip_info(file, fh, arg);
2544                if (p->match.addr)
2545                        return -EINVAL;
2546                return 0;
2547
2548        case V4L2_CHIP_MATCH_SUBDEV:
2549                if (vfd->v4l2_dev == NULL)
2550                        break;
2551                v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2552                        if (p->match.addr != idx++)
2553                                continue;
2554                        if (sd->ops->core && sd->ops->core->s_register)
2555                                p->flags |= V4L2_CHIP_FL_WRITABLE;
2556                        if (sd->ops->core && sd->ops->core->g_register)
2557                                p->flags |= V4L2_CHIP_FL_READABLE;
2558                        strscpy(p->name, sd->name, sizeof(p->name));
2559                        return 0;
2560                }
2561                break;
2562        }
2563        return -EINVAL;
2564#else
2565        return -ENOTTY;
2566#endif
2567}
2568
2569static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2570                                struct file *file, void *fh, void *arg)
2571{
2572        return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2573}
2574
2575static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2576                                struct file *file, void *fh, void *arg)
2577{
2578        return ops->vidioc_subscribe_event(fh, arg);
2579}
2580
2581static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2582                                struct file *file, void *fh, void *arg)
2583{
2584        return ops->vidioc_unsubscribe_event(fh, arg);
2585}
2586
2587static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2588                                struct file *file, void *fh, void *arg)
2589{
2590        struct v4l2_sliced_vbi_cap *p = arg;
2591        int ret = check_fmt(file, p->type);
2592
2593        if (ret)
2594                return ret;
2595
2596        /* Clear up to type, everything after type is zeroed already */
2597        memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2598
2599        return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2600}
2601
2602static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2603                                struct file *file, void *fh, void *arg)
2604{
2605        struct video_device *vfd = video_devdata(file);
2606        struct v4l2_frequency_band *p = arg;
2607        enum v4l2_tuner_type type;
2608        int err;
2609
2610        if (vfd->vfl_type == VFL_TYPE_SDR) {
2611                if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2612                        return -EINVAL;
2613                type = p->type;
2614        } else {
2615                type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2616                                V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2617                if (type != p->type)
2618                        return -EINVAL;
2619        }
2620        if (ops->vidioc_enum_freq_bands) {
2621                err = ops->vidioc_enum_freq_bands(file, fh, p);
2622                if (err != -ENOTTY)
2623                        return err;
2624        }
2625        if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2626                struct v4l2_tuner t = {
2627                        .index = p->tuner,
2628                        .type = type,
2629                };
2630
2631                if (p->index)
2632                        return -EINVAL;
2633                err = ops->vidioc_g_tuner(file, fh, &t);
2634                if (err)
2635                        return err;
2636                p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2637                p->rangelow = t.rangelow;
2638                p->rangehigh = t.rangehigh;
2639                p->modulation = (type == V4L2_TUNER_RADIO) ?
2640                        V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2641                return 0;
2642        }
2643        if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2644                struct v4l2_modulator m = {
2645                        .index = p->tuner,
2646                };
2647
2648                if (type != V4L2_TUNER_RADIO)
2649                        return -EINVAL;
2650                if (p->index)
2651                        return -EINVAL;
2652                err = ops->vidioc_g_modulator(file, fh, &m);
2653                if (err)
2654                        return err;
2655                p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2656                p->rangelow = m.rangelow;
2657                p->rangehigh = m.rangehigh;
2658                p->modulation = (type == V4L2_TUNER_RADIO) ?
2659                        V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2660                return 0;
2661        }
2662        return -ENOTTY;
2663}
2664
2665struct v4l2_ioctl_info {
2666        unsigned int ioctl;
2667        u32 flags;
2668        const char * const name;
2669        int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2670                    void *fh, void *p);
2671        void (*debug)(const void *arg, bool write_only);
2672};
2673
2674/* This control needs a priority check */
2675#define INFO_FL_PRIO            (1 << 0)
2676/* This control can be valid if the filehandle passes a control handler. */
2677#define INFO_FL_CTRL            (1 << 1)
2678/* Queuing ioctl */
2679#define INFO_FL_QUEUE           (1 << 2)
2680/* Always copy back result, even on error */
2681#define INFO_FL_ALWAYS_COPY     (1 << 3)
2682/* Zero struct from after the field to the end */
2683#define INFO_FL_CLEAR(v4l2_struct, field)                       \
2684        ((offsetof(struct v4l2_struct, field) +                 \
2685          sizeof_field(struct v4l2_struct, field)) << 16)
2686#define INFO_FL_CLEAR_MASK      (_IOC_SIZEMASK << 16)
2687
2688#define DEFINE_V4L_STUB_FUNC(_vidioc)                           \
2689        static int v4l_stub_ ## _vidioc(                        \
2690                        const struct v4l2_ioctl_ops *ops,       \
2691                        struct file *file, void *fh, void *p)   \
2692        {                                                       \
2693                return ops->vidioc_ ## _vidioc(file, fh, p);    \
2694        }
2695
2696#define IOCTL_INFO(_ioctl, _func, _debug, _flags)               \
2697        [_IOC_NR(_ioctl)] = {                                   \
2698                .ioctl = _ioctl,                                \
2699                .flags = _flags,                                \
2700                .name = #_ioctl,                                \
2701                .func = _func,                                  \
2702                .debug = _debug,                                \
2703        }
2704
2705DEFINE_V4L_STUB_FUNC(g_fbuf)
2706DEFINE_V4L_STUB_FUNC(s_fbuf)
2707DEFINE_V4L_STUB_FUNC(expbuf)
2708DEFINE_V4L_STUB_FUNC(g_std)
2709DEFINE_V4L_STUB_FUNC(g_audio)
2710DEFINE_V4L_STUB_FUNC(s_audio)
2711DEFINE_V4L_STUB_FUNC(g_edid)
2712DEFINE_V4L_STUB_FUNC(s_edid)
2713DEFINE_V4L_STUB_FUNC(g_audout)
2714DEFINE_V4L_STUB_FUNC(s_audout)
2715DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2716DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2717DEFINE_V4L_STUB_FUNC(enumaudio)
2718DEFINE_V4L_STUB_FUNC(enumaudout)
2719DEFINE_V4L_STUB_FUNC(enum_framesizes)
2720DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2721DEFINE_V4L_STUB_FUNC(g_enc_index)
2722DEFINE_V4L_STUB_FUNC(encoder_cmd)
2723DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2724DEFINE_V4L_STUB_FUNC(decoder_cmd)
2725DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2726DEFINE_V4L_STUB_FUNC(s_dv_timings)
2727DEFINE_V4L_STUB_FUNC(g_dv_timings)
2728DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2729DEFINE_V4L_STUB_FUNC(query_dv_timings)
2730DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2731
2732static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2733        IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2734        IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2735        IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2736        IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2737        IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2738        IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2739        IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2740        IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2741        IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2742        IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2743        IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2744        IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2745        IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2746        IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2747        IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2748        IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2749        IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2750        IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2751        IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2752        IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2753        IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2754        IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2755        IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2756        IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2757        IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2758        IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2759        IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2760        IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2761        IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2762        IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2763        IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2764        IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2765        IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2766        IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2767        IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2768        IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2769        IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2770        IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2771        IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2772        IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2773        IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2774        IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2775        IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2776        IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2777        IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2778        IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2779        IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2780        IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2781        IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2782        IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2783        IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2784        IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2785        IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2786        IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2787        IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2788        IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2789        IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2790        IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2791        IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2792        IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2793        IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2794        IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2795        IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2796        IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2797        IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2798        IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2799        IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2800        IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2801        IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2802        IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2803        IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2804        IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2805        IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2806        IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2807        IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2808        IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2809        IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2810        IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2811        IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2812        IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2813        IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2814        IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2815};
2816#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2817
2818static bool v4l2_is_known_ioctl(unsigned int cmd)
2819{
2820        if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2821                return false;
2822        return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2823}
2824
2825static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2826                                         struct v4l2_fh *vfh, unsigned int cmd,
2827                                         void *arg)
2828{
2829        if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2830                return vdev->lock;
2831        if (vfh && vfh->m2m_ctx &&
2832            (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2833                if (vfh->m2m_ctx->q_lock)
2834                        return vfh->m2m_ctx->q_lock;
2835        }
2836        if (vdev->queue && vdev->queue->lock &&
2837                        (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2838                return vdev->queue->lock;
2839        return vdev->lock;
2840}
2841
2842/* Common ioctl debug function. This function can be used by
2843   external ioctl messages as well as internal V4L ioctl */
2844void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2845{
2846        const char *dir, *type;
2847
2848        if (prefix)
2849                printk(KERN_DEBUG "%s: ", prefix);
2850
2851        switch (_IOC_TYPE(cmd)) {
2852        case 'd':
2853                type = "v4l2_int";
2854                break;
2855        case 'V':
2856                if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2857                        type = "v4l2";
2858                        break;
2859                }
2860                pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2861                return;
2862        default:
2863                type = "unknown";
2864                break;
2865        }
2866
2867        switch (_IOC_DIR(cmd)) {
2868        case _IOC_NONE:              dir = "--"; break;
2869        case _IOC_READ:              dir = "r-"; break;
2870        case _IOC_WRITE:             dir = "-w"; break;
2871        case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2872        default:                     dir = "*ERR*"; break;
2873        }
2874        pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2875                type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2876}
2877EXPORT_SYMBOL(v4l_printk_ioctl);
2878
2879static long __video_do_ioctl(struct file *file,
2880                unsigned int cmd, void *arg)
2881{
2882        struct video_device *vfd = video_devdata(file);
2883        struct mutex *req_queue_lock = NULL;
2884        struct mutex *lock; /* ioctl serialization mutex */
2885        const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2886        bool write_only = false;
2887        struct v4l2_ioctl_info default_info;
2888        const struct v4l2_ioctl_info *info;
2889        void *fh = file->private_data;
2890        struct v4l2_fh *vfh = NULL;
2891        int dev_debug = vfd->dev_debug;
2892        long ret = -ENOTTY;
2893
2894        if (ops == NULL) {
2895                pr_warn("%s: has no ioctl_ops.\n",
2896                                video_device_node_name(vfd));
2897                return ret;
2898        }
2899
2900        if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2901                vfh = file->private_data;
2902
2903        /*
2904         * We need to serialize streamon/off with queueing new requests.
2905         * These ioctls may trigger the cancellation of a streaming
2906         * operation, and that should not be mixed with queueing a new
2907         * request at the same time.
2908         */
2909        if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2910            (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2911                req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2912
2913                if (mutex_lock_interruptible(req_queue_lock))
2914                        return -ERESTARTSYS;
2915        }
2916
2917        lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2918
2919        if (lock && mutex_lock_interruptible(lock)) {
2920                if (req_queue_lock)
2921                        mutex_unlock(req_queue_lock);
2922                return -ERESTARTSYS;
2923        }
2924
2925        if (!video_is_registered(vfd)) {
2926                ret = -ENODEV;
2927                goto unlock;
2928        }
2929
2930        if (v4l2_is_known_ioctl(cmd)) {
2931                info = &v4l2_ioctls[_IOC_NR(cmd)];
2932
2933                if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2934                    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2935                        goto done;
2936
2937                if (vfh && (info->flags & INFO_FL_PRIO)) {
2938                        ret = v4l2_prio_check(vfd->prio, vfh->prio);
2939                        if (ret)
2940                                goto done;
2941                }
2942        } else {
2943                default_info.ioctl = cmd;
2944                default_info.flags = 0;
2945                default_info.debug = v4l_print_default;
2946                info = &default_info;
2947        }
2948
2949        write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2950        if (info != &default_info) {
2951                ret = info->func(ops, file, fh, arg);
2952        } else if (!ops->vidioc_default) {
2953                ret = -ENOTTY;
2954        } else {
2955                ret = ops->vidioc_default(file, fh,
2956                        vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2957                        cmd, arg);
2958        }
2959
2960done:
2961        if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2962                if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2963                    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2964                        goto unlock;
2965
2966                v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2967                if (ret < 0)
2968                        pr_cont(": error %ld", ret);
2969                if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2970                        pr_cont("\n");
2971                else if (_IOC_DIR(cmd) == _IOC_NONE)
2972                        info->debug(arg, write_only);
2973                else {
2974                        pr_cont(": ");
2975                        info->debug(arg, write_only);
2976                }
2977        }
2978
2979unlock:
2980        if (lock)
2981                mutex_unlock(lock);
2982        if (req_queue_lock)
2983                mutex_unlock(req_queue_lock);
2984        return ret;
2985}
2986
2987static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2988                            void __user **user_ptr, void ***kernel_ptr)
2989{
2990        int ret = 0;
2991
2992        switch (cmd) {
2993        case VIDIOC_PREPARE_BUF:
2994        case VIDIOC_QUERYBUF:
2995        case VIDIOC_QBUF:
2996        case VIDIOC_DQBUF: {
2997                struct v4l2_buffer *buf = parg;
2998
2999                if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3000                        if (buf->length > VIDEO_MAX_PLANES) {
3001                                ret = -EINVAL;
3002                                break;
3003                        }
3004                        *user_ptr = (void __user *)buf->m.planes;
3005                        *kernel_ptr = (void **)&buf->m.planes;
3006                        *array_size = sizeof(struct v4l2_plane) * buf->length;
3007                        ret = 1;
3008                }
3009                break;
3010        }
3011
3012        case VIDIOC_G_EDID:
3013        case VIDIOC_S_EDID: {
3014                struct v4l2_edid *edid = parg;
3015
3016                if (edid->blocks) {
3017                        if (edid->blocks > 256) {
3018                                ret = -EINVAL;
3019                                break;
3020                        }
3021                        *user_ptr = (void __user *)edid->edid;
3022                        *kernel_ptr = (void **)&edid->edid;
3023                        *array_size = edid->blocks * 128;
3024                        ret = 1;
3025                }
3026                break;
3027        }
3028
3029        case VIDIOC_S_EXT_CTRLS:
3030        case VIDIOC_G_EXT_CTRLS:
3031        case VIDIOC_TRY_EXT_CTRLS: {
3032                struct v4l2_ext_controls *ctrls = parg;
3033
3034                if (ctrls->count != 0) {
3035                        if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3036                                ret = -EINVAL;
3037                                break;
3038                        }
3039                        *user_ptr = (void __user *)ctrls->controls;
3040                        *kernel_ptr = (void **)&ctrls->controls;
3041                        *array_size = sizeof(struct v4l2_ext_control)
3042                                    * ctrls->count;
3043                        ret = 1;
3044                }
3045                break;
3046        }
3047        case VIDIOC_G_FMT:
3048        case VIDIOC_S_FMT:
3049        case VIDIOC_TRY_FMT: {
3050                struct v4l2_format *fmt = parg;
3051
3052                if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3053                    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3054                        break;
3055                if (fmt->fmt.win.clipcount > 2048)
3056                        return -EINVAL;
3057                if (!fmt->fmt.win.clipcount)
3058                        break;
3059
3060                *user_ptr = (void __user *)fmt->fmt.win.clips;
3061                *kernel_ptr = (void **)&fmt->fmt.win.clips;
3062                *array_size = sizeof(struct v4l2_clip)
3063                                * fmt->fmt.win.clipcount;
3064
3065                ret = 1;
3066                break;
3067        }
3068        }
3069
3070        return ret;
3071}
3072
3073static unsigned int video_translate_cmd(unsigned int cmd)
3074{
3075#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3076        switch (cmd) {
3077        case VIDIOC_DQEVENT_TIME32:
3078                return VIDIOC_DQEVENT;
3079        case VIDIOC_QUERYBUF_TIME32:
3080                return VIDIOC_QUERYBUF;
3081        case VIDIOC_QBUF_TIME32:
3082                return VIDIOC_QBUF;
3083        case VIDIOC_DQBUF_TIME32:
3084                return VIDIOC_DQBUF;
3085        case VIDIOC_PREPARE_BUF_TIME32:
3086                return VIDIOC_PREPARE_BUF;
3087        }
3088#endif
3089        if (in_compat_syscall())
3090                return v4l2_compat_translate_cmd(cmd);
3091
3092        return cmd;
3093}
3094
3095static int video_get_user(void __user *arg, void *parg,
3096                          unsigned int real_cmd, unsigned int cmd,
3097                          bool *always_copy)
3098{
3099        unsigned int n = _IOC_SIZE(real_cmd);
3100        int err = 0;
3101
3102        if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3103                /* read-only ioctl */
3104                memset(parg, 0, n);
3105                return 0;
3106        }
3107
3108        /*
3109         * In some cases, only a few fields are used as input,
3110         * i.e. when the app sets "index" and then the driver
3111         * fills in the rest of the structure for the thing
3112         * with that index.  We only need to copy up the first
3113         * non-input field.
3114         */
3115        if (v4l2_is_known_ioctl(real_cmd)) {
3116                u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3117
3118                if (flags & INFO_FL_CLEAR_MASK)
3119                        n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3120                *always_copy = flags & INFO_FL_ALWAYS_COPY;
3121        }
3122
3123        if (cmd == real_cmd) {
3124                if (copy_from_user(parg, (void __user *)arg, n))
3125                        err = -EFAULT;
3126        } else if (in_compat_syscall()) {
3127                memset(parg, 0, n);
3128                err = v4l2_compat_get_user(arg, parg, cmd);
3129        } else {
3130                memset(parg, 0, n);
3131#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3132                switch (cmd) {
3133                case VIDIOC_QUERYBUF_TIME32:
3134                case VIDIOC_QBUF_TIME32:
3135                case VIDIOC_DQBUF_TIME32:
3136                case VIDIOC_PREPARE_BUF_TIME32: {
3137                        struct v4l2_buffer_time32 vb32;
3138                        struct v4l2_buffer *vb = parg;
3139
3140                        if (copy_from_user(&vb32, arg, sizeof(vb32)))
3141                                return -EFAULT;
3142
3143                        *vb = (struct v4l2_buffer) {
3144                                .index          = vb32.index,
3145                                .type           = vb32.type,
3146                                .bytesused      = vb32.bytesused,
3147                                .flags          = vb32.flags,
3148                                .field          = vb32.field,
3149                                .timestamp.tv_sec       = vb32.timestamp.tv_sec,
3150                                .timestamp.tv_usec      = vb32.timestamp.tv_usec,
3151                                .timecode       = vb32.timecode,
3152                                .sequence       = vb32.sequence,
3153                                .memory         = vb32.memory,
3154                                .m.userptr      = vb32.m.userptr,
3155                                .length         = vb32.length,
3156                                .request_fd     = vb32.request_fd,
3157                        };
3158                        break;
3159                }
3160                }
3161#endif
3162        }
3163
3164        /* zero out anything we don't copy from userspace */
3165        if (!err && n < _IOC_SIZE(real_cmd))
3166                memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3167        return err;
3168}
3169
3170static int video_put_user(void __user *arg, void *parg,
3171                          unsigned int real_cmd, unsigned int cmd)
3172{
3173        if (!(_IOC_DIR(cmd) & _IOC_READ))
3174                return 0;
3175
3176        if (cmd == real_cmd) {
3177                /*  Copy results into user buffer  */
3178                if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3179                        return -EFAULT;
3180                return 0;
3181        }
3182
3183        if (in_compat_syscall())
3184                return v4l2_compat_put_user(arg, parg, cmd);
3185
3186#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3187        switch (cmd) {
3188        case VIDIOC_DQEVENT_TIME32: {
3189                struct v4l2_event *ev = parg;
3190                struct v4l2_event_time32 ev32;
3191
3192                memset(&ev32, 0, sizeof(ev32));
3193
3194                ev32.type       = ev->type;
3195                ev32.pending    = ev->pending;
3196                ev32.sequence   = ev->sequence;
3197                ev32.timestamp.tv_sec   = ev->timestamp.tv_sec;
3198                ev32.timestamp.tv_nsec  = ev->timestamp.tv_nsec;
3199                ev32.id         = ev->id;
3200
3201                memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3202                memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3203
3204                if (copy_to_user(arg, &ev32, sizeof(ev32)))
3205                        return -EFAULT;
3206                break;
3207        }
3208        case VIDIOC_QUERYBUF_TIME32:
3209        case VIDIOC_QBUF_TIME32:
3210        case VIDIOC_DQBUF_TIME32:
3211        case VIDIOC_PREPARE_BUF_TIME32: {
3212                struct v4l2_buffer *vb = parg;
3213                struct v4l2_buffer_time32 vb32;
3214
3215                memset(&vb32, 0, sizeof(vb32));
3216
3217                vb32.index      = vb->index;
3218                vb32.type       = vb->type;
3219                vb32.bytesused  = vb->bytesused;
3220                vb32.flags      = vb->flags;
3221                vb32.field      = vb->field;
3222                vb32.timestamp.tv_sec   = vb->timestamp.tv_sec;
3223                vb32.timestamp.tv_usec  = vb->timestamp.tv_usec;
3224                vb32.timecode   = vb->timecode;
3225                vb32.sequence   = vb->sequence;
3226                vb32.memory     = vb->memory;
3227                vb32.m.userptr  = vb->m.userptr;
3228                vb32.length     = vb->length;
3229                vb32.request_fd = vb->request_fd;
3230
3231                if (copy_to_user(arg, &vb32, sizeof(vb32)))
3232                        return -EFAULT;
3233                break;
3234        }
3235        }
3236#endif
3237
3238        return 0;
3239}
3240
3241long
3242video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3243               v4l2_kioctl func)
3244{
3245        char    sbuf[128];
3246        void    *mbuf = NULL, *array_buf = NULL;
3247        void    *parg = (void *)arg;
3248        long    err  = -EINVAL;
3249        bool    has_array_args;
3250        bool    always_copy = false;
3251        size_t  array_size = 0;
3252        void __user *user_ptr = NULL;
3253        void    **kernel_ptr = NULL;
3254        unsigned int cmd = video_translate_cmd(orig_cmd);
3255        const size_t ioc_size = _IOC_SIZE(cmd);
3256
3257        /*  Copy arguments into temp kernel buffer  */
3258        if (_IOC_DIR(cmd) != _IOC_NONE) {
3259                if (ioc_size <= sizeof(sbuf)) {
3260                        parg = sbuf;
3261                } else {
3262                        /* too big to allocate from stack */
3263                        mbuf = kmalloc(ioc_size, GFP_KERNEL);
3264                        if (NULL == mbuf)
3265                                return -ENOMEM;
3266                        parg = mbuf;
3267                }
3268
3269                err = video_get_user((void __user *)arg, parg, cmd,
3270                                     orig_cmd, &always_copy);
3271                if (err)
3272                        goto out;
3273        }
3274
3275        err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3276        if (err < 0)
3277                goto out;
3278        has_array_args = err;
3279
3280        if (has_array_args) {
3281                array_buf = kvmalloc(array_size, GFP_KERNEL);
3282                err = -ENOMEM;
3283                if (array_buf == NULL)
3284                        goto out_array_args;
3285                err = -EFAULT;
3286                if (in_compat_syscall())
3287                        err = v4l2_compat_get_array_args(file, array_buf,
3288                                                         user_ptr, array_size,
3289                                                         orig_cmd, parg);
3290                else
3291                        err = copy_from_user(array_buf, user_ptr, array_size) ?
3292                                                                -EFAULT : 0;
3293                if (err)
3294                        goto out_array_args;
3295                *kernel_ptr = array_buf;
3296        }
3297
3298        /* Handles IOCTL */
3299        err = func(file, cmd, parg);
3300        if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3301                err = -ENOTTY;
3302                goto out;
3303        }
3304
3305        if (err == 0) {
3306                if (cmd == VIDIOC_DQBUF)
3307                        trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3308                else if (cmd == VIDIOC_QBUF)
3309                        trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3310        }
3311
3312        if (has_array_args) {
3313                *kernel_ptr = (void __force *)user_ptr;
3314                if (in_compat_syscall()) {
3315                        int put_err;
3316
3317                        put_err = v4l2_compat_put_array_args(file, user_ptr,
3318                                                             array_buf,
3319                                                             array_size,
3320                                                             orig_cmd, parg);
3321                        if (put_err)
3322                                err = put_err;
3323                } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3324                        err = -EFAULT;
3325                }
3326                goto out_array_args;
3327        }
3328        /*
3329         * Some ioctls can return an error, but still have valid
3330         * results that must be returned.
3331         */
3332        if (err < 0 && !always_copy)
3333                goto out;
3334
3335out_array_args:
3336        if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3337                err = -EFAULT;
3338out:
3339        kvfree(array_buf);
3340        kfree(mbuf);
3341        return err;
3342}
3343
3344long video_ioctl2(struct file *file,
3345               unsigned int cmd, unsigned long arg)
3346{
3347        return video_usercopy(file, cmd, arg, __video_do_ioctl);
3348}
3349EXPORT_SYMBOL(video_ioctl2);
3350
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