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/media-device.h> /* for media_set_bus_info() */
  22#include <media/v4l2-common.h>
  23#include <media/v4l2-ioctl.h>
  24#include <media/v4l2-ctrls.h>
  25#include <media/v4l2-fh.h>
  26#include <media/v4l2-event.h>
  27#include <media/v4l2-device.h>
  28#include <media/videobuf2-v4l2.h>
  29#include <media/v4l2-mc.h>
  30#include <media/v4l2-mem2mem.h>
  31
  32#include <trace/events/v4l2.h>
  33
  34#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  35
  36struct std_descr {
  37	v4l2_std_id std;
  38	const char *descr;
  39};
  40
  41static const struct std_descr standards[] = {
  42	{ V4L2_STD_NTSC,	"NTSC"      },
  43	{ V4L2_STD_NTSC_M,	"NTSC-M"    },
  44	{ V4L2_STD_NTSC_M_JP,	"NTSC-M-JP" },
  45	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
  46	{ V4L2_STD_NTSC_443,	"NTSC-443"  },
  47	{ V4L2_STD_PAL,		"PAL"       },
  48	{ V4L2_STD_PAL_BG,	"PAL-BG"    },
  49	{ V4L2_STD_PAL_B,	"PAL-B"     },
  50	{ V4L2_STD_PAL_B1,	"PAL-B1"    },
  51	{ V4L2_STD_PAL_G,	"PAL-G"     },
  52	{ V4L2_STD_PAL_H,	"PAL-H"     },
  53	{ V4L2_STD_PAL_I,	"PAL-I"     },
  54	{ V4L2_STD_PAL_DK,	"PAL-DK"    },
  55	{ V4L2_STD_PAL_D,	"PAL-D"     },
  56	{ V4L2_STD_PAL_D1,	"PAL-D1"    },
  57	{ V4L2_STD_PAL_K,	"PAL-K"     },
  58	{ V4L2_STD_PAL_M,	"PAL-M"     },
  59	{ V4L2_STD_PAL_N,	"PAL-N"     },
  60	{ V4L2_STD_PAL_Nc,	"PAL-Nc"    },
  61	{ V4L2_STD_PAL_60,	"PAL-60"    },
  62	{ V4L2_STD_SECAM,	"SECAM"     },
  63	{ V4L2_STD_SECAM_B,	"SECAM-B"   },
  64	{ V4L2_STD_SECAM_G,	"SECAM-G"   },
  65	{ V4L2_STD_SECAM_H,	"SECAM-H"   },
  66	{ V4L2_STD_SECAM_DK,	"SECAM-DK"  },
  67	{ V4L2_STD_SECAM_D,	"SECAM-D"   },
  68	{ V4L2_STD_SECAM_K,	"SECAM-K"   },
  69	{ V4L2_STD_SECAM_K1,	"SECAM-K1"  },
  70	{ V4L2_STD_SECAM_L,	"SECAM-L"   },
  71	{ V4L2_STD_SECAM_LC,	"SECAM-Lc"  },
  72	{ 0,			"Unknown"   }
  73};
  74
  75/* video4linux standard ID conversion to standard name
  76 */
  77const char *v4l2_norm_to_name(v4l2_std_id id)
  78{
  79	u32 myid = id;
  80	int i;
  81
  82	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  83	   64 bit comparisons. So, on that architecture, with some gcc
  84	   variants, compilation fails. Currently, the max value is 30bit wide.
  85	 */
  86	BUG_ON(myid != id);
  87
  88	for (i = 0; standards[i].std; i++)
  89		if (myid == standards[i].std)
  90			break;
  91	return standards[i].descr;
  92}
  93EXPORT_SYMBOL(v4l2_norm_to_name);
  94
  95/* Returns frame period for the given standard */
  96void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
  97{
  98	if (id & V4L2_STD_525_60) {
  99		frameperiod->numerator = 1001;
 100		frameperiod->denominator = 30000;
 101	} else {
 102		frameperiod->numerator = 1;
 103		frameperiod->denominator = 25;
 104	}
 105}
 106EXPORT_SYMBOL(v4l2_video_std_frame_period);
 107
 108/* Fill in the fields of a v4l2_standard structure according to the
 109   'id' and 'transmission' parameters.  Returns negative on error.  */
 110int v4l2_video_std_construct(struct v4l2_standard *vs,
 111			     int id, const char *name)
 112{
 113	vs->id = id;
 114	v4l2_video_std_frame_period(id, &vs->frameperiod);
 115	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 116	strscpy(vs->name, name, sizeof(vs->name));
 117	return 0;
 118}
 119EXPORT_SYMBOL(v4l2_video_std_construct);
 120
 121/* Fill in the fields of a v4l2_standard structure according to the
 122 * 'id' and 'vs->index' parameters. Returns negative on error. */
 123int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
 124{
 125	v4l2_std_id curr_id = 0;
 126	unsigned int index = vs->index, i, j = 0;
 127	const char *descr = "";
 128
 129	/* Return -ENODATA if the id for the current input
 130	   or output is 0, meaning that it doesn't support this API. */
 131	if (id == 0)
 132		return -ENODATA;
 133
 134	/* Return norm array in a canonical way */
 135	for (i = 0; i <= index && id; i++) {
 136		/* last std value in the standards array is 0, so this
 137		   while always ends there since (id & 0) == 0. */
 138		while ((id & standards[j].std) != standards[j].std)
 139			j++;
 140		curr_id = standards[j].std;
 141		descr = standards[j].descr;
 142		j++;
 143		if (curr_id == 0)
 144			break;
 145		if (curr_id != V4L2_STD_PAL &&
 146				curr_id != V4L2_STD_SECAM &&
 147				curr_id != V4L2_STD_NTSC)
 148			id &= ~curr_id;
 149	}
 150	if (i <= index)
 151		return -EINVAL;
 152
 153	v4l2_video_std_construct(vs, curr_id, descr);
 154	return 0;
 155}
 156
 157/* ----------------------------------------------------------------- */
 158/* some arrays for pretty-printing debug messages of enum types      */
 159
 160const char *v4l2_field_names[] = {
 161	[V4L2_FIELD_ANY]        = "any",
 162	[V4L2_FIELD_NONE]       = "none",
 163	[V4L2_FIELD_TOP]        = "top",
 164	[V4L2_FIELD_BOTTOM]     = "bottom",
 165	[V4L2_FIELD_INTERLACED] = "interlaced",
 166	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
 167	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
 168	[V4L2_FIELD_ALTERNATE]  = "alternate",
 169	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 170	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 171};
 172EXPORT_SYMBOL(v4l2_field_names);
 173
 174const char *v4l2_type_names[] = {
 175	[0]				   = "0",
 176	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 177	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 178	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 179	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 180	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 181	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 182	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 183	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 184	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 185	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 186	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 187	[V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 188	[V4L2_BUF_TYPE_META_CAPTURE]       = "meta-cap",
 189	[V4L2_BUF_TYPE_META_OUTPUT]	   = "meta-out",
 190};
 191EXPORT_SYMBOL(v4l2_type_names);
 192
 193static const char *v4l2_memory_names[] = {
 194	[V4L2_MEMORY_MMAP]    = "mmap",
 195	[V4L2_MEMORY_USERPTR] = "userptr",
 196	[V4L2_MEMORY_OVERLAY] = "overlay",
 197	[V4L2_MEMORY_DMABUF] = "dmabuf",
 198};
 199
 200#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 201
 202/* ------------------------------------------------------------------ */
 203/* debug help functions                                               */
 204
 205static void v4l_print_querycap(const void *arg, bool write_only)
 206{
 207	const struct v4l2_capability *p = arg;
 208
 209	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
 210		(int)sizeof(p->driver), p->driver,
 211		(int)sizeof(p->card), p->card,
 212		(int)sizeof(p->bus_info), p->bus_info,
 213		p->version, p->capabilities, p->device_caps);
 214}
 215
 216static void v4l_print_enuminput(const void *arg, bool write_only)
 217{
 218	const struct v4l2_input *p = arg;
 219
 220	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 221		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 222		p->tuner, (unsigned long long)p->std, p->status,
 223		p->capabilities);
 224}
 225
 226static void v4l_print_enumoutput(const void *arg, bool write_only)
 227{
 228	const struct v4l2_output *p = arg;
 229
 230	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 231		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 232		p->modulator, (unsigned long long)p->std, p->capabilities);
 233}
 234
 235static void v4l_print_audio(const void *arg, bool write_only)
 236{
 237	const struct v4l2_audio *p = arg;
 238
 239	if (write_only)
 240		pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 241	else
 242		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 243			p->index, (int)sizeof(p->name), p->name,
 244			p->capability, p->mode);
 245}
 246
 247static void v4l_print_audioout(const void *arg, bool write_only)
 248{
 249	const struct v4l2_audioout *p = arg;
 250
 251	if (write_only)
 252		pr_cont("index=%u\n", p->index);
 253	else
 254		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 255			p->index, (int)sizeof(p->name), p->name,
 256			p->capability, p->mode);
 257}
 258
 259static void v4l_print_fmtdesc(const void *arg, bool write_only)
 260{
 261	const struct v4l2_fmtdesc *p = arg;
 262
 263	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
 264		p->index, prt_names(p->type, v4l2_type_names),
 265		p->flags, &p->pixelformat, p->mbus_code,
 266		(int)sizeof(p->description), p->description);
 267}
 268
 269static void v4l_print_format(const void *arg, bool write_only)
 270{
 271	const struct v4l2_format *p = arg;
 272	const struct v4l2_pix_format *pix;
 273	const struct v4l2_pix_format_mplane *mp;
 274	const struct v4l2_vbi_format *vbi;
 275	const struct v4l2_sliced_vbi_format *sliced;
 276	const struct v4l2_window *win;
 277	const struct v4l2_meta_format *meta;
 278	u32 pixelformat;
 279	u32 planes;
 280	unsigned i;
 281
 282	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 283	switch (p->type) {
 284	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 285	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 286		pix = &p->fmt.pix;
 287		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",
 288			pix->width, pix->height, &pix->pixelformat,
 289			prt_names(pix->field, v4l2_field_names),
 290			pix->bytesperline, pix->sizeimage,
 291			pix->colorspace, pix->flags, pix->ycbcr_enc,
 292			pix->quantization, pix->xfer_func);
 293		break;
 294	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 295	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 296		mp = &p->fmt.pix_mp;
 297		pixelformat = mp->pixelformat;
 298		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",
 299			mp->width, mp->height, &pixelformat,
 300			prt_names(mp->field, v4l2_field_names),
 301			mp->colorspace, mp->num_planes, mp->flags,
 302			mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 303		planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
 304		for (i = 0; i < planes; i++)
 305			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 306					mp->plane_fmt[i].bytesperline,
 307					mp->plane_fmt[i].sizeimage);
 308		break;
 309	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 310	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 311		win = &p->fmt.win;
 312		/* Note: we can't print the clip list here since the clips
 313		 * pointer is a userspace pointer, not a kernelspace
 314		 * pointer. */
 315		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",
 316			win->w.width, win->w.height, win->w.left, win->w.top,
 317			prt_names(win->field, v4l2_field_names),
 318			win->chromakey, win->clipcount, win->clips,
 319			win->bitmap, win->global_alpha);
 320		break;
 321	case V4L2_BUF_TYPE_VBI_CAPTURE:
 322	case V4L2_BUF_TYPE_VBI_OUTPUT:
 323		vbi = &p->fmt.vbi;
 324		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
 325			vbi->sampling_rate, vbi->offset,
 326			vbi->samples_per_line, &vbi->sample_format,
 327			vbi->start[0], vbi->start[1],
 328			vbi->count[0], vbi->count[1]);
 329		break;
 330	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 331	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 332		sliced = &p->fmt.sliced;
 333		pr_cont(", service_set=0x%08x, io_size=%d\n",
 334				sliced->service_set, sliced->io_size);
 335		for (i = 0; i < 24; i++)
 336			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 337				sliced->service_lines[0][i],
 338				sliced->service_lines[1][i]);
 339		break;
 340	case V4L2_BUF_TYPE_SDR_CAPTURE:
 341	case V4L2_BUF_TYPE_SDR_OUTPUT:
 342		pixelformat = p->fmt.sdr.pixelformat;
 343		pr_cont(", pixelformat=%p4cc\n", &pixelformat);
 344		break;
 345	case V4L2_BUF_TYPE_META_CAPTURE:
 346	case V4L2_BUF_TYPE_META_OUTPUT:
 347		meta = &p->fmt.meta;
 348		pixelformat = meta->dataformat;
 349		pr_cont(", dataformat=%p4cc, buffersize=%u\n",
 350			&pixelformat, meta->buffersize);
 351		break;
 352	}
 353}
 354
 355static void v4l_print_framebuffer(const void *arg, bool write_only)
 356{
 357	const struct v4l2_framebuffer *p = arg;
 358
 359	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 360		p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
 361		&p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
 362		p->fmt.colorspace);
 363}
 364
 365static void v4l_print_buftype(const void *arg, bool write_only)
 366{
 367	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 368}
 369
 370static void v4l_print_modulator(const void *arg, bool write_only)
 371{
 372	const struct v4l2_modulator *p = arg;
 373
 374	if (write_only)
 375		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 376	else
 377		pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 378			p->index, (int)sizeof(p->name), p->name, p->capability,
 379			p->rangelow, p->rangehigh, p->txsubchans);
 380}
 381
 382static void v4l_print_tuner(const void *arg, bool write_only)
 383{
 384	const struct v4l2_tuner *p = arg;
 385
 386	if (write_only)
 387		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 388	else
 389		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",
 390			p->index, (int)sizeof(p->name), p->name, p->type,
 391			p->capability, p->rangelow,
 392			p->rangehigh, p->signal, p->afc,
 393			p->rxsubchans, p->audmode);
 394}
 395
 396static void v4l_print_frequency(const void *arg, bool write_only)
 397{
 398	const struct v4l2_frequency *p = arg;
 399
 400	pr_cont("tuner=%u, type=%u, frequency=%u\n",
 401				p->tuner, p->type, p->frequency);
 402}
 403
 404static void v4l_print_standard(const void *arg, bool write_only)
 405{
 406	const struct v4l2_standard *p = arg;
 407
 408	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
 409		p->index,
 410		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
 411		p->frameperiod.numerator,
 412		p->frameperiod.denominator,
 413		p->framelines);
 414}
 415
 416static void v4l_print_std(const void *arg, bool write_only)
 417{
 418	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 419}
 420
 421static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 422{
 423	const struct v4l2_hw_freq_seek *p = arg;
 424
 425	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
 426		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 427		p->rangelow, p->rangehigh);
 428}
 429
 430static void v4l_print_requestbuffers(const void *arg, bool write_only)
 431{
 432	const struct v4l2_requestbuffers *p = arg;
 433
 434	pr_cont("count=%d, type=%s, memory=%s\n",
 435		p->count,
 436		prt_names(p->type, v4l2_type_names),
 437		prt_names(p->memory, v4l2_memory_names));
 438}
 439
 440static void v4l_print_buffer(const void *arg, bool write_only)
 441{
 442	const struct v4l2_buffer *p = arg;
 443	const struct v4l2_timecode *tc = &p->timecode;
 444	const struct v4l2_plane *plane;
 445	int i;
 446
 447	pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
 448			(int)p->timestamp.tv_sec / 3600,
 449			((int)p->timestamp.tv_sec / 60) % 60,
 450			((int)p->timestamp.tv_sec % 60),
 451			(long)p->timestamp.tv_usec,
 452			p->index,
 453			prt_names(p->type, v4l2_type_names), p->request_fd,
 454			p->flags, prt_names(p->field, v4l2_field_names),
 455			p->sequence, prt_names(p->memory, v4l2_memory_names));
 456
 457	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 458		pr_cont("\n");
 459		for (i = 0; i < p->length; ++i) {
 460			plane = &p->m.planes[i];
 461			printk(KERN_DEBUG
 462				"plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
 463				i, plane->bytesused, plane->data_offset,
 464				plane->m.userptr, plane->length);
 465		}
 466	} else {
 467		pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
 468			p->bytesused, p->m.userptr, p->length);
 469	}
 470
 471	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
 472			tc->hours, tc->minutes, tc->seconds,
 473			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 474}
 475
 476static void v4l_print_exportbuffer(const void *arg, bool write_only)
 477{
 478	const struct v4l2_exportbuffer *p = arg;
 479
 480	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 481		p->fd, prt_names(p->type, v4l2_type_names),
 482		p->index, p->plane, p->flags);
 483}
 484
 485static void v4l_print_create_buffers(const void *arg, bool write_only)
 486{
 487	const struct v4l2_create_buffers *p = arg;
 488
 489	pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
 490		p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 491		p->capabilities);
 492	v4l_print_format(&p->format, write_only);
 493}
 494
 495static void v4l_print_streamparm(const void *arg, bool write_only)
 496{
 497	const struct v4l2_streamparm *p = arg;
 498
 499	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 500
 501	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 502	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 503		const struct v4l2_captureparm *c = &p->parm.capture;
 504
 505		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
 506			c->capability, c->capturemode,
 507			c->timeperframe.numerator, c->timeperframe.denominator,
 508			c->extendedmode, c->readbuffers);
 509	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 510		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 511		const struct v4l2_outputparm *c = &p->parm.output;
 512
 513		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
 514			c->capability, c->outputmode,
 515			c->timeperframe.numerator, c->timeperframe.denominator,
 516			c->extendedmode, c->writebuffers);
 517	} else {
 518		pr_cont("\n");
 519	}
 520}
 521
 522static void v4l_print_queryctrl(const void *arg, bool write_only)
 523{
 524	const struct v4l2_queryctrl *p = arg;
 525
 526	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
 527			p->id, p->type, (int)sizeof(p->name), p->name,
 528			p->minimum, p->maximum,
 529			p->step, p->default_value, p->flags);
 530}
 531
 532static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 533{
 534	const struct v4l2_query_ext_ctrl *p = arg;
 535
 536	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",
 537			p->id, p->type, (int)sizeof(p->name), p->name,
 538			p->minimum, p->maximum,
 539			p->step, p->default_value, p->flags,
 540			p->elem_size, p->elems, p->nr_of_dims,
 541			p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 542}
 543
 544static void v4l_print_querymenu(const void *arg, bool write_only)
 545{
 546	const struct v4l2_querymenu *p = arg;
 547
 548	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 549}
 550
 551static void v4l_print_control(const void *arg, bool write_only)
 552{
 553	const struct v4l2_control *p = arg;
 554	const char *name = v4l2_ctrl_get_name(p->id);
 555
 556	if (name)
 557		pr_cont("name=%s, ", name);
 558	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 559}
 560
 561static void v4l_print_ext_controls(const void *arg, bool write_only)
 562{
 563	const struct v4l2_ext_controls *p = arg;
 564	int i;
 565
 566	pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
 567			p->which, p->count, p->error_idx, p->request_fd);
 568	for (i = 0; i < p->count; i++) {
 569		unsigned int id = p->controls[i].id;
 570		const char *name = v4l2_ctrl_get_name(id);
 571
 572		if (name)
 573			pr_cont(", name=%s", name);
 574		if (!p->controls[i].size)
 575			pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
 576		else
 577			pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
 578	}
 579	pr_cont("\n");
 580}
 581
 582static void v4l_print_cropcap(const void *arg, bool write_only)
 583{
 584	const struct v4l2_cropcap *p = arg;
 585
 586	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
 587		prt_names(p->type, v4l2_type_names),
 588		p->bounds.width, p->bounds.height,
 589		p->bounds.left, p->bounds.top,
 590		p->defrect.width, p->defrect.height,
 591		p->defrect.left, p->defrect.top,
 592		p->pixelaspect.numerator, p->pixelaspect.denominator);
 593}
 594
 595static void v4l_print_crop(const void *arg, bool write_only)
 596{
 597	const struct v4l2_crop *p = arg;
 598
 599	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 600		prt_names(p->type, v4l2_type_names),
 601		p->c.width, p->c.height,
 602		p->c.left, p->c.top);
 603}
 604
 605static void v4l_print_selection(const void *arg, bool write_only)
 606{
 607	const struct v4l2_selection *p = arg;
 608
 609	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 610		prt_names(p->type, v4l2_type_names),
 611		p->target, p->flags,
 612		p->r.width, p->r.height, p->r.left, p->r.top);
 613}
 614
 615static void v4l_print_jpegcompression(const void *arg, bool write_only)
 616{
 617	const struct v4l2_jpegcompression *p = arg;
 618
 619	pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
 620		p->quality, p->APPn, p->APP_len,
 621		p->COM_len, p->jpeg_markers);
 622}
 623
 624static void v4l_print_enc_idx(const void *arg, bool write_only)
 625{
 626	const struct v4l2_enc_idx *p = arg;
 627
 628	pr_cont("entries=%d, entries_cap=%d\n",
 629			p->entries, p->entries_cap);
 630}
 631
 632static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 633{
 634	const struct v4l2_encoder_cmd *p = arg;
 635
 636	pr_cont("cmd=%d, flags=0x%x\n",
 637			p->cmd, p->flags);
 638}
 639
 640static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 641{
 642	const struct v4l2_decoder_cmd *p = arg;
 643
 644	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 645
 646	if (p->cmd == V4L2_DEC_CMD_START)
 647		pr_info("speed=%d, format=%u\n",
 648				p->start.speed, p->start.format);
 649	else if (p->cmd == V4L2_DEC_CMD_STOP)
 650		pr_info("pts=%llu\n", p->stop.pts);
 651}
 652
 653static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 654{
 655	const struct v4l2_dbg_chip_info *p = arg;
 656
 657	pr_cont("type=%u, ", p->match.type);
 658	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 659		pr_cont("name=%.*s, ",
 660				(int)sizeof(p->match.name), p->match.name);
 661	else
 662		pr_cont("addr=%u, ", p->match.addr);
 663	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 664}
 665
 666static void v4l_print_dbg_register(const void *arg, bool write_only)
 667{
 668	const struct v4l2_dbg_register *p = arg;
 669
 670	pr_cont("type=%u, ", p->match.type);
 671	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 672		pr_cont("name=%.*s, ",
 673				(int)sizeof(p->match.name), p->match.name);
 674	else
 675		pr_cont("addr=%u, ", p->match.addr);
 676	pr_cont("reg=0x%llx, val=0x%llx\n",
 677			p->reg, p->val);
 678}
 679
 680static void v4l_print_dv_timings(const void *arg, bool write_only)
 681{
 682	const struct v4l2_dv_timings *p = arg;
 683
 684	switch (p->type) {
 685	case V4L2_DV_BT_656_1120:
 686		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",
 687				p->bt.interlaced, p->bt.pixelclock,
 688				p->bt.width, p->bt.height,
 689				p->bt.polarities, p->bt.hfrontporch,
 690				p->bt.hsync, p->bt.hbackporch,
 691				p->bt.vfrontporch, p->bt.vsync,
 692				p->bt.vbackporch, p->bt.il_vfrontporch,
 693				p->bt.il_vsync, p->bt.il_vbackporch,
 694				p->bt.standards, p->bt.flags);
 695		break;
 696	default:
 697		pr_cont("type=%d\n", p->type);
 698		break;
 699	}
 700}
 701
 702static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 703{
 704	const struct v4l2_enum_dv_timings *p = arg;
 705
 706	pr_cont("index=%u, ", p->index);
 707	v4l_print_dv_timings(&p->timings, write_only);
 708}
 709
 710static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 711{
 712	const struct v4l2_dv_timings_cap *p = arg;
 713
 714	switch (p->type) {
 715	case V4L2_DV_BT_656_1120:
 716		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 717			p->bt.min_width, p->bt.max_width,
 718			p->bt.min_height, p->bt.max_height,
 719			p->bt.min_pixelclock, p->bt.max_pixelclock,
 720			p->bt.standards, p->bt.capabilities);
 721		break;
 722	default:
 723		pr_cont("type=%u\n", p->type);
 724		break;
 725	}
 726}
 727
 728static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 729{
 730	const struct v4l2_frmsizeenum *p = arg;
 731
 732	pr_cont("index=%u, pixelformat=%p4cc, type=%u",
 733		p->index, &p->pixel_format, p->type);
 734	switch (p->type) {
 735	case V4L2_FRMSIZE_TYPE_DISCRETE:
 736		pr_cont(", wxh=%ux%u\n",
 737			p->discrete.width, p->discrete.height);
 738		break;
 739	case V4L2_FRMSIZE_TYPE_STEPWISE:
 740		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 741				p->stepwise.min_width,
 742				p->stepwise.min_height,
 743				p->stepwise.max_width,
 744				p->stepwise.max_height,
 745				p->stepwise.step_width,
 746				p->stepwise.step_height);
 747		break;
 748	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 749	default:
 750		pr_cont("\n");
 751		break;
 752	}
 753}
 754
 755static void v4l_print_frmivalenum(const void *arg, bool write_only)
 756{
 757	const struct v4l2_frmivalenum *p = arg;
 758
 759	pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
 760		p->index, &p->pixel_format, p->width, p->height, p->type);
 761	switch (p->type) {
 762	case V4L2_FRMIVAL_TYPE_DISCRETE:
 763		pr_cont(", fps=%d/%d\n",
 764				p->discrete.numerator,
 765				p->discrete.denominator);
 766		break;
 767	case V4L2_FRMIVAL_TYPE_STEPWISE:
 768		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 769				p->stepwise.min.numerator,
 770				p->stepwise.min.denominator,
 771				p->stepwise.max.numerator,
 772				p->stepwise.max.denominator,
 773				p->stepwise.step.numerator,
 774				p->stepwise.step.denominator);
 775		break;
 776	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 777	default:
 778		pr_cont("\n");
 779		break;
 780	}
 781}
 782
 783static void v4l_print_event(const void *arg, bool write_only)
 784{
 785	const struct v4l2_event *p = arg;
 786	const struct v4l2_event_ctrl *c;
 787
 788	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
 789			p->type, p->pending, p->sequence, p->id,
 790			p->timestamp.tv_sec, p->timestamp.tv_nsec);
 791	switch (p->type) {
 792	case V4L2_EVENT_VSYNC:
 793		printk(KERN_DEBUG "field=%s\n",
 794			prt_names(p->u.vsync.field, v4l2_field_names));
 795		break;
 796	case V4L2_EVENT_CTRL:
 797		c = &p->u.ctrl;
 798		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 799			c->changes, c->type);
 800		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 801			pr_cont("value64=%lld, ", c->value64);
 802		else
 803			pr_cont("value=%d, ", c->value);
 804		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
 805			c->flags, c->minimum, c->maximum,
 806			c->step, c->default_value);
 807		break;
 808	case V4L2_EVENT_FRAME_SYNC:
 809		pr_cont("frame_sequence=%u\n",
 810			p->u.frame_sync.frame_sequence);
 811		break;
 812	}
 813}
 814
 815static void v4l_print_event_subscription(const void *arg, bool write_only)
 816{
 817	const struct v4l2_event_subscription *p = arg;
 818
 819	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 820			p->type, p->id, p->flags);
 821}
 822
 823static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 824{
 825	const struct v4l2_sliced_vbi_cap *p = arg;
 826	int i;
 827
 828	pr_cont("type=%s, service_set=0x%08x\n",
 829			prt_names(p->type, v4l2_type_names), p->service_set);
 830	for (i = 0; i < 24; i++)
 831		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 832				p->service_lines[0][i],
 833				p->service_lines[1][i]);
 834}
 835
 836static void v4l_print_freq_band(const void *arg, bool write_only)
 837{
 838	const struct v4l2_frequency_band *p = arg;
 839
 840	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 841			p->tuner, p->type, p->index,
 842			p->capability, p->rangelow,
 843			p->rangehigh, p->modulation);
 844}
 845
 846static void v4l_print_edid(const void *arg, bool write_only)
 847{
 848	const struct v4l2_edid *p = arg;
 849
 850	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 851		p->pad, p->start_block, p->blocks);
 852}
 853
 854static void v4l_print_u32(const void *arg, bool write_only)
 855{
 856	pr_cont("value=%u\n", *(const u32 *)arg);
 857}
 858
 859static void v4l_print_newline(const void *arg, bool write_only)
 860{
 861	pr_cont("\n");
 862}
 863
 864static void v4l_print_default(const void *arg, bool write_only)
 865{
 866	pr_cont("driver-specific ioctl\n");
 867}
 868
 869static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
 870{
 871	__u32 i;
 872
 873	/* zero the reserved fields */
 874	c->reserved[0] = 0;
 875	for (i = 0; i < c->count; i++)
 876		c->controls[i].reserved2[0] = 0;
 877
 878	switch (c->which) {
 879	case V4L2_CID_PRIVATE_BASE:
 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 (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
 887			return false;
 888		break;
 889	case V4L2_CTRL_WHICH_DEF_VAL:
 890		/* Default value cannot be changed */
 891		if (ioctl == VIDIOC_S_EXT_CTRLS ||
 892		    ioctl == VIDIOC_TRY_EXT_CTRLS) {
 893			c->error_idx = c->count;
 894			return false;
 895		}
 896		return true;
 897	case V4L2_CTRL_WHICH_CUR_VAL:
 898		return true;
 899	case V4L2_CTRL_WHICH_REQUEST_VAL:
 900		c->error_idx = c->count;
 901		return false;
 902	}
 903
 904	/* Check that all controls are from the same control class. */
 905	for (i = 0; i < c->count; i++) {
 906		if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 907			c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
 908								      c->count;
 909			return false;
 910		}
 911	}
 912	return true;
 913}
 914
 915static int check_fmt(struct file *file, enum v4l2_buf_type type)
 916{
 917	const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
 918			     V4L2_CAP_VIDEO_CAPTURE_MPLANE |
 919			     V4L2_CAP_VIDEO_OUTPUT |
 920			     V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 921			     V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
 922	const u32 meta_caps = V4L2_CAP_META_CAPTURE |
 923			      V4L2_CAP_META_OUTPUT;
 924	struct video_device *vfd = video_devdata(file);
 925	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 926	bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
 927		      (vfd->device_caps & vid_caps);
 928	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 929	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 930	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
 931	bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
 932		       (vfd->device_caps & meta_caps);
 933	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 934	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 935
 936	if (ops == NULL)
 937		return -EINVAL;
 938
 939	switch (type) {
 940	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 941		if ((is_vid || is_tch) && is_rx &&
 942		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 943			return 0;
 944		break;
 945	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 946		if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 947			return 0;
 948		break;
 949	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 950		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 951			return 0;
 952		break;
 953	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 954		if (is_vid && is_tx &&
 955		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 956			return 0;
 957		break;
 958	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 959		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 960			return 0;
 961		break;
 962	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 963		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 964			return 0;
 965		break;
 966	case V4L2_BUF_TYPE_VBI_CAPTURE:
 967		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 968			return 0;
 969		break;
 970	case V4L2_BUF_TYPE_VBI_OUTPUT:
 971		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 972			return 0;
 973		break;
 974	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 975		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 976			return 0;
 977		break;
 978	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 979		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 980			return 0;
 981		break;
 982	case V4L2_BUF_TYPE_SDR_CAPTURE:
 983		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 984			return 0;
 985		break;
 986	case V4L2_BUF_TYPE_SDR_OUTPUT:
 987		if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 988			return 0;
 989		break;
 990	case V4L2_BUF_TYPE_META_CAPTURE:
 991		if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
 992			return 0;
 993		break;
 994	case V4L2_BUF_TYPE_META_OUTPUT:
 995		if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
 996			return 0;
 997		break;
 998	default:
 999		break;
1000	}
1001	return -EINVAL;
1002}
1003
1004static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
1005				    u32 *encoding, u32 *quantization,
1006				    u32 *xfer_func)
1007{
1008	bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
1009		      pixelformat == V4L2_PIX_FMT_HSV32;
1010
1011	if (!v4l2_is_colorspace_valid(*colorspace)) {
1012		*colorspace = V4L2_COLORSPACE_DEFAULT;
1013		*encoding = V4L2_YCBCR_ENC_DEFAULT;
1014		*quantization = V4L2_QUANTIZATION_DEFAULT;
1015		*xfer_func = V4L2_XFER_FUNC_DEFAULT;
1016	}
1017
1018	if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
1019	    (is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
1020		*encoding = V4L2_YCBCR_ENC_DEFAULT;
1021
1022	if (!v4l2_is_quant_valid(*quantization))
1023		*quantization = V4L2_QUANTIZATION_DEFAULT;
1024
1025	if (!v4l2_is_xfer_func_valid(*xfer_func))
1026		*xfer_func = V4L2_XFER_FUNC_DEFAULT;
1027}
1028
1029static void v4l_sanitize_format(struct v4l2_format *fmt)
1030{
1031	unsigned int offset;
1032
1033	/* Make sure num_planes is not bogus */
1034	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1035	    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1036		fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1037					       VIDEO_MAX_PLANES);
1038
1039	/*
1040	 * The v4l2_pix_format structure has been extended with fields that were
1041	 * not previously required to be set to zero by applications. The priv
1042	 * field, when set to a magic value, indicates that the extended fields
1043	 * are valid. Otherwise they will contain undefined values. To simplify
1044	 * the API towards drivers zero the extended fields and set the priv
1045	 * field to the magic value when the extended pixel format structure
1046	 * isn't used by applications.
1047	 */
1048	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1049	    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1050		if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
1051			fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1052
1053			offset = offsetof(struct v4l2_pix_format, priv)
1054			       + sizeof(fmt->fmt.pix.priv);
1055			memset(((void *)&fmt->fmt.pix) + offset, 0,
1056			       sizeof(fmt->fmt.pix) - offset);
1057		}
1058	}
1059
1060	/* Replace invalid colorspace values with defaults. */
1061	if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1062	    fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
1063		v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
1064					&fmt->fmt.pix.colorspace,
1065					&fmt->fmt.pix.ycbcr_enc,
1066					&fmt->fmt.pix.quantization,
1067					&fmt->fmt.pix.xfer_func);
1068	} else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1069		   fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
1070		u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
1071		u32 quantization = fmt->fmt.pix_mp.quantization;
1072		u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
1073
1074		v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
1075					&fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
1076					&quantization, &xfer_func);
1077
1078		fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
1079		fmt->fmt.pix_mp.quantization = quantization;
1080		fmt->fmt.pix_mp.xfer_func = xfer_func;
1081	}
1082}
1083
1084static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1085				struct file *file, void *fh, void *arg)
1086{
1087	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1088	struct video_device *vfd = video_devdata(file);
1089	int ret;
1090
1091	cap->version = LINUX_VERSION_CODE;
1092	cap->device_caps = vfd->device_caps;
1093	cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1094
1095	media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
1096			   vfd->dev_parent);
1097
1098	ret = ops->vidioc_querycap(file, fh, cap);
1099
1100	/*
1101	 * Drivers must not change device_caps, so check for this and
1102	 * warn if this happened.
1103	 */
1104	WARN_ON(cap->device_caps != vfd->device_caps);
1105	/*
1106	 * Check that capabilities is a superset of
1107	 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1108	 */
1109	WARN_ON((cap->capabilities &
1110		 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1111		(vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1112	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1113	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1114
1115	return ret;
1116}
1117
1118static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1119		       struct file *file, void *fh, void *arg)
1120{
1121	struct video_device *vfd = video_devdata(file);
1122
1123	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1124		*(int *)arg = 0;
1125		return 0;
1126	}
1127
1128	return ops->vidioc_g_input(file, fh, arg);
1129}
1130
1131static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1132			struct file *file, void *fh, void *arg)
1133{
1134	struct video_device *vfd = video_devdata(file);
1135
1136	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1137		*(int *)arg = 0;
1138		return 0;
1139	}
1140
1141	return ops->vidioc_g_output(file, fh, arg);
1142}
1143
1144static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1145				struct file *file, void *fh, void *arg)
1146{
1147	struct video_device *vfd = video_devdata(file);
1148	int ret;
1149
1150	ret = v4l_enable_media_source(vfd);
1151	if (ret)
1152		return ret;
1153
1154	if (vfd->device_caps & V4L2_CAP_IO_MC)
1155		return  *(int *)arg ? -EINVAL : 0;
1156
1157	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1158}
1159
1160static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1161				struct file *file, void *fh, void *arg)
1162{
1163	struct video_device *vfd = video_devdata(file);
1164
1165	if (vfd->device_caps & V4L2_CAP_IO_MC)
1166		return  *(int *)arg ? -EINVAL : 0;
1167
1168	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1169}
1170
1171static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1172				struct file *file, void *fh, void *arg)
1173{
1174	struct video_device *vfd;
1175	u32 *p = arg;
1176
1177	vfd = video_devdata(file);
1178	*p = v4l2_prio_max(vfd->prio);
1179	return 0;
1180}
1181
1182static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1183				struct file *file, void *fh, void *arg)
1184{
1185	struct video_device *vfd;
1186	struct v4l2_fh *vfh;
1187	u32 *p = arg;
1188
1189	vfd = video_devdata(file);
1190	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1191		return -ENOTTY;
1192	vfh = file->private_data;
1193	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1194}
1195
1196static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1197				struct file *file, void *fh, void *arg)
1198{
1199	struct video_device *vfd = video_devdata(file);
1200	struct v4l2_input *p = arg;
1201
1202	/*
1203	 * We set the flags for CAP_DV_TIMINGS &
1204	 * CAP_STD here based on ioctl handler provided by the
1205	 * driver. If the driver doesn't support these
1206	 * for a specific input, it must override these flags.
1207	 */
1208	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1209		p->capabilities |= V4L2_IN_CAP_STD;
1210
1211	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1212		if (p->index)
1213			return -EINVAL;
1214		strscpy(p->name, vfd->name, sizeof(p->name));
1215		p->type = V4L2_INPUT_TYPE_CAMERA;
1216		return 0;
1217	}
1218
1219	return ops->vidioc_enum_input(file, fh, p);
1220}
1221
1222static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1223				struct file *file, void *fh, void *arg)
1224{
1225	struct video_device *vfd = video_devdata(file);
1226	struct v4l2_output *p = arg;
1227
1228	/*
1229	 * We set the flags for CAP_DV_TIMINGS &
1230	 * CAP_STD here based on ioctl handler provided by the
1231	 * driver. If the driver doesn't support these
1232	 * for a specific output, it must override these flags.
1233	 */
1234	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1235		p->capabilities |= V4L2_OUT_CAP_STD;
1236
1237	if (vfd->device_caps & V4L2_CAP_IO_MC) {
1238		if (p->index)
1239			return -EINVAL;
1240		strscpy(p->name, vfd->name, sizeof(p->name));
1241		p->type = V4L2_OUTPUT_TYPE_ANALOG;
1242		return 0;
1243	}
1244
1245	return ops->vidioc_enum_output(file, fh, p);
1246}
1247
1248static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1249{
1250	const unsigned sz = sizeof(fmt->description);
1251	const char *descr = NULL;
1252	u32 flags = 0;
1253
1254	/*
1255	 * We depart from the normal coding style here since the descriptions
1256	 * should be aligned so it is easy to see which descriptions will be
1257	 * longer than 31 characters (the max length for a description).
1258	 * And frankly, this is easier to read anyway.
1259	 *
1260	 * Note that gcc will use O(log N) comparisons to find the right case.
1261	 */
1262	switch (fmt->pixelformat) {
1263	/* Max description length mask:	descr = "0123456789012345678901234567890" */
1264	case V4L2_PIX_FMT_RGB332:	descr = "8-bit RGB 3-3-2"; break;
1265	case V4L2_PIX_FMT_RGB444:	descr = "16-bit A/XRGB 4-4-4-4"; break;
1266	case V4L2_PIX_FMT_ARGB444:	descr = "16-bit ARGB 4-4-4-4"; break;
1267	case V4L2_PIX_FMT_XRGB444:	descr = "16-bit XRGB 4-4-4-4"; break;
1268	case V4L2_PIX_FMT_RGBA444:	descr = "16-bit RGBA 4-4-4-4"; break;
1269	case V4L2_PIX_FMT_RGBX444:	descr = "16-bit RGBX 4-4-4-4"; break;
1270	case V4L2_PIX_FMT_ABGR444:	descr = "16-bit ABGR 4-4-4-4"; break;
1271	case V4L2_PIX_FMT_XBGR444:	descr = "16-bit XBGR 4-4-4-4"; break;
1272	case V4L2_PIX_FMT_BGRA444:	descr = "16-bit BGRA 4-4-4-4"; break;
1273	case V4L2_PIX_FMT_BGRX444:	descr = "16-bit BGRX 4-4-4-4"; break;
1274	case V4L2_PIX_FMT_RGB555:	descr = "16-bit A/XRGB 1-5-5-5"; break;
1275	case V4L2_PIX_FMT_ARGB555:	descr = "16-bit ARGB 1-5-5-5"; break;
1276	case V4L2_PIX_FMT_XRGB555:	descr = "16-bit XRGB 1-5-5-5"; break;
1277	case V4L2_PIX_FMT_ABGR555:	descr = "16-bit ABGR 1-5-5-5"; break;
1278	case V4L2_PIX_FMT_XBGR555:	descr = "16-bit XBGR 1-5-5-5"; break;
1279	case V4L2_PIX_FMT_RGBA555:	descr = "16-bit RGBA 5-5-5-1"; break;
1280	case V4L2_PIX_FMT_RGBX555:	descr = "16-bit RGBX 5-5-5-1"; break;
1281	case V4L2_PIX_FMT_BGRA555:	descr = "16-bit BGRA 5-5-5-1"; break;
1282	case V4L2_PIX_FMT_BGRX555:	descr = "16-bit BGRX 5-5-5-1"; break;
1283	case V4L2_PIX_FMT_RGB565:	descr = "16-bit RGB 5-6-5"; break;
1284	case V4L2_PIX_FMT_RGB555X:	descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1285	case V4L2_PIX_FMT_ARGB555X:	descr = "16-bit ARGB 1-5-5-5 BE"; break;
1286	case V4L2_PIX_FMT_XRGB555X:	descr = "16-bit XRGB 1-5-5-5 BE"; break;
1287	case V4L2_PIX_FMT_RGB565X:	descr = "16-bit RGB 5-6-5 BE"; break;
1288	case V4L2_PIX_FMT_BGR666:	descr = "18-bit BGRX 6-6-6-14"; break;
1289	case V4L2_PIX_FMT_BGR24:	descr = "24-bit BGR 8-8-8"; break;
1290	case V4L2_PIX_FMT_RGB24:	descr = "24-bit RGB 8-8-8"; break;
1291	case V4L2_PIX_FMT_BGR32:	descr = "32-bit BGRA/X 8-8-8-8"; break;
1292	case V4L2_PIX_FMT_ABGR32:	descr = "32-bit BGRA 8-8-8-8"; break;
1293	case V4L2_PIX_FMT_XBGR32:	descr = "32-bit BGRX 8-8-8-8"; break;
1294	case V4L2_PIX_FMT_RGB32:	descr = "32-bit A/XRGB 8-8-8-8"; break;
1295	case V4L2_PIX_FMT_ARGB32:	descr = "32-bit ARGB 8-8-8-8"; break;
1296	case V4L2_PIX_FMT_XRGB32:	descr = "32-bit XRGB 8-8-8-8"; break;
1297	case V4L2_PIX_FMT_BGRA32:	descr = "32-bit ABGR 8-8-8-8"; break;
1298	case V4L2_PIX_FMT_BGRX32:	descr = "32-bit XBGR 8-8-8-8"; break;
1299	case V4L2_PIX_FMT_RGBA32:	descr = "32-bit RGBA 8-8-8-8"; break;
1300	case V4L2_PIX_FMT_RGBX32:	descr = "32-bit RGBX 8-8-8-8"; break;
1301	case V4L2_PIX_FMT_GREY:		descr = "8-bit Greyscale"; break;
1302	case V4L2_PIX_FMT_Y4:		descr = "4-bit Greyscale"; break;
1303	case V4L2_PIX_FMT_Y6:		descr = "6-bit Greyscale"; break;
1304	case V4L2_PIX_FMT_Y10:		descr = "10-bit Greyscale"; break;
1305	case V4L2_PIX_FMT_Y12:		descr = "12-bit Greyscale"; break;
1306	case V4L2_PIX_FMT_Y14:		descr = "14-bit Greyscale"; break;
1307	case V4L2_PIX_FMT_Y16:		descr = "16-bit Greyscale"; break;
1308	case V4L2_PIX_FMT_Y16_BE:	descr = "16-bit Greyscale BE"; break;
1309	case V4L2_PIX_FMT_Y10BPACK:	descr = "10-bit Greyscale (Packed)"; break;
1310	case V4L2_PIX_FMT_Y10P:		descr = "10-bit Greyscale (MIPI Packed)"; break;
1311	case V4L2_PIX_FMT_IPU3_Y10:	descr = "10-bit greyscale (IPU3 Packed)"; break;
1312	case V4L2_PIX_FMT_Y8I:		descr = "Interleaved 8-bit Greyscale"; break;
1313	case V4L2_PIX_FMT_Y12I:		descr = "Interleaved 12-bit Greyscale"; break;
1314	case V4L2_PIX_FMT_Z16:		descr = "16-bit Depth"; break;
1315	case V4L2_PIX_FMT_INZI:		descr = "Planar 10:16 Greyscale Depth"; break;
1316	case V4L2_PIX_FMT_CNF4:		descr = "4-bit Depth Confidence (Packed)"; break;
1317	case V4L2_PIX_FMT_PAL8:		descr = "8-bit Palette"; break;
1318	case V4L2_PIX_FMT_UV8:		descr = "8-bit Chrominance UV 4-4"; break;
1319	case V4L2_PIX_FMT_YVU410:	descr = "Planar YVU 4:1:0"; break;
1320	case V4L2_PIX_FMT_YVU420:	descr = "Planar YVU 4:2:0"; break;
1321	case V4L2_PIX_FMT_YUYV:		descr = "YUYV 4:2:2"; break;
1322	case V4L2_PIX_FMT_YYUV:		descr = "YYUV 4:2:2"; break;
1323	case V4L2_PIX_FMT_YVYU:		descr = "YVYU 4:2:2"; break;
1324	case V4L2_PIX_FMT_UYVY:		descr = "UYVY 4:2:2"; break;
1325	case V4L2_PIX_FMT_VYUY:		descr = "VYUY 4:2:2"; break;
1326	case V4L2_PIX_FMT_YUV422P:	descr = "Planar YUV 4:2:2"; break;
1327	case V4L2_PIX_FMT_YUV411P:	descr = "Planar YUV 4:1:1"; break;
1328	case V4L2_PIX_FMT_Y41P:		descr = "YUV 4:1:1 (Packed)"; break;
1329	case V4L2_PIX_FMT_YUV444:	descr = "16-bit A/XYUV 4-4-4-4"; break;
1330	case V4L2_PIX_FMT_YUV555:	descr = "16-bit A/XYUV 1-5-5-5"; break;
1331	case V4L2_PIX_FMT_YUV565:	descr = "16-bit YUV 5-6-5"; break;
1332	case V4L2_PIX_FMT_YUV24:	descr = "24-bit YUV 4:4:4 8-8-8"; break;
1333	case V4L2_PIX_FMT_YUV32:	descr = "32-bit A/XYUV 8-8-8-8"; break;
1334	case V4L2_PIX_FMT_AYUV32:	descr = "32-bit AYUV 8-8-8-8"; break;
1335	case V4L2_PIX_FMT_XYUV32:	descr = "32-bit XYUV 8-8-8-8"; break;
1336	case V4L2_PIX_FMT_VUYA32:	descr = "32-bit VUYA 8-8-8-8"; break;
1337	case V4L2_PIX_FMT_VUYX32:	descr = "32-bit VUYX 8-8-8-8"; break;
1338	case V4L2_PIX_FMT_YUVA32:	descr = "32-bit YUVA 8-8-8-8"; break;
1339	case V4L2_PIX_FMT_YUVX32:	descr = "32-bit YUVX 8-8-8-8"; break;
1340	case V4L2_PIX_FMT_YUV410:	descr = "Planar YUV 4:1:0"; break;
1341	case V4L2_PIX_FMT_YUV420:	descr = "Planar YUV 4:2:0"; break;
1342	case V4L2_PIX_FMT_HI240:	descr = "8-bit Dithered RGB (BTTV)"; break;
1343	case V4L2_PIX_FMT_M420:		descr = "YUV 4:2:0 (M420)"; break;
1344	case V4L2_PIX_FMT_NV12:		descr = "Y/UV 4:2:0"; break;
1345	case V4L2_PIX_FMT_NV21:		descr = "Y/VU 4:2:0"; break;
1346	case V4L2_PIX_FMT_NV16:		descr = "Y/UV 4:2:2"; break;
1347	case V4L2_PIX_FMT_NV61:		descr = "Y/VU 4:2:2"; break;
1348	case V4L2_PIX_FMT_NV24:		descr = "Y/UV 4:4:4"; break;
1349	case V4L2_PIX_FMT_NV42:		descr = "Y/VU 4:4:4"; break;
1350	case V4L2_PIX_FMT_P010:		descr = "10-bit Y/UV 4:2:0"; break;
1351	case V4L2_PIX_FMT_NV12_4L4:	descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
1352	case V4L2_PIX_FMT_NV12_16L16:	descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
1353	case V4L2_PIX_FMT_NV12_32L32:   descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
1354	case V4L2_PIX_FMT_P010_4L4:	descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
1355	case V4L2_PIX_FMT_NV12M:	descr = "Y/UV 4:2:0 (N-C)"; break;
1356	case V4L2_PIX_FMT_NV21M:	descr = "Y/VU 4:2:0 (N-C)"; break;
1357	case V4L2_PIX_FMT_NV16M:	descr = "Y/UV 4:2:2 (N-C)"; break;
1358	case V4L2_PIX_FMT_NV61M:	descr = "Y/VU 4:2:2 (N-C)"; break;
1359	case V4L2_PIX_FMT_NV12MT:	descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
1360	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
1361	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
1362	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
1363	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
1364	case V4L2_PIX_FMT_YVU422M:	descr = "Planar YVU 4:2:2 (N-C)"; break;
1365	case V4L2_PIX_FMT_YUV444M:	descr = "Planar YUV 4:4:4 (N-C)"; break;
1366	case V4L2_PIX_FMT_YVU444M:	descr = "Planar YVU 4:4:4 (N-C)"; break;
1367	case V4L2_PIX_FMT_SBGGR8:	descr = "8-bit Bayer BGBG/GRGR"; break;
1368	case V4L2_PIX_FMT_SGBRG8:	descr = "8-bit Bayer GBGB/RGRG"; break;
1369	case V4L2_PIX_FMT_SGRBG8:	descr = "8-bit Bayer GRGR/BGBG"; break;
1370	case V4L2_PIX_FMT_SRGGB8:	descr = "8-bit Bayer RGRG/GBGB"; break;
1371	case V4L2_PIX_FMT_SBGGR10:	descr = "10-bit Bayer BGBG/GRGR"; break;
1372	case V4L2_PIX_FMT_SGBRG10:	descr = "10-bit Bayer GBGB/RGRG"; break;
1373	case V4L2_PIX_FMT_SGRBG10:	descr = "10-bit Bayer GRGR/BGBG"; break;
1374	case V4L2_PIX_FMT_SRGGB10:	descr = "10-bit Bayer RGRG/GBGB"; break;
1375	case V4L2_PIX_FMT_SBGGR10P:	descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1376	case V4L2_PIX_FMT_SGBRG10P:	descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1377	case V4L2_PIX_FMT_SGRBG10P:	descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1378	case V4L2_PIX_FMT_SRGGB10P:	descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1379	case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1380	case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1381	case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1382	case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1383	case V4L2_PIX_FMT_SBGGR10ALAW8:	descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1384	case V4L2_PIX_FMT_SGBRG10ALAW8:	descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1385	case V4L2_PIX_FMT_SGRBG10ALAW8:	descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1386	case V4L2_PIX_FMT_SRGGB10ALAW8:	descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1387	case V4L2_PIX_FMT_SBGGR10DPCM8:	descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1388	case V4L2_PIX_FMT_SGBRG10DPCM8:	descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1389	case V4L2_PIX_FMT_SGRBG10DPCM8:	descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1390	case V4L2_PIX_FMT_SRGGB10DPCM8:	descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1391	case V4L2_PIX_FMT_SBGGR12:	descr = "12-bit Bayer BGBG/GRGR"; break;
1392	case V4L2_PIX_FMT_SGBRG12:	descr = "12-bit Bayer GBGB/RGRG"; break;
1393	case V4L2_PIX_FMT_SGRBG12:	descr = "12-bit Bayer GRGR/BGBG"; break;
1394	case V4L2_PIX_FMT_SRGGB12:	descr = "12-bit Bayer RGRG/GBGB"; break;
1395	case V4L2_PIX_FMT_SBGGR12P:	descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1396	case V4L2_PIX_FMT_SGBRG12P:	descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1397	case V4L2_PIX_FMT_SGRBG12P:	descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1398	case V4L2_PIX_FMT_SRGGB12P:	descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1399	case V4L2_PIX_FMT_SBGGR14:	descr = "14-bit Bayer BGBG/GRGR"; break;
1400	case V4L2_PIX_FMT_SGBRG14:	descr = "14-bit Bayer GBGB/RGRG"; break;
1401	case V4L2_PIX_FMT_SGRBG14:	descr = "14-bit Bayer GRGR/BGBG"; break;
1402	case V4L2_PIX_FMT_SRGGB14:	descr = "14-bit Bayer RGRG/GBGB"; break;
1403	case V4L2_PIX_FMT_SBGGR14P:	descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1404	case V4L2_PIX_FMT_SGBRG14P:	descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1405	case V4L2_PIX_FMT_SGRBG14P:	descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1406	case V4L2_PIX_FMT_SRGGB14P:	descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1407	case V4L2_PIX_FMT_SBGGR16:	descr = "16-bit Bayer BGBG/GRGR"; break;
1408	case V4L2_PIX_FMT_SGBRG16:	descr = "16-bit Bayer GBGB/RGRG"; break;
1409	case V4L2_PIX_FMT_SGRBG16:	descr = "16-bit Bayer GRGR/BGBG"; break;
1410	case V4L2_PIX_FMT_SRGGB16:	descr = "16-bit Bayer RGRG/GBGB"; break;
1411	case V4L2_PIX_FMT_SN9C20X_I420:	descr = "GSPCA SN9C20X I420"; break;
1412	case V4L2_PIX_FMT_SPCA501:	descr = "GSPCA SPCA501"; break;
1413	case V4L2_PIX_FMT_SPCA505:	descr = "GSPCA SPCA505"; break;
1414	case V4L2_PIX_FMT_SPCA508:	descr = "GSPCA SPCA508"; break;
1415	case V4L2_PIX_FMT_STV0680:	descr = "GSPCA STV0680"; break;
1416	case V4L2_PIX_FMT_TM6000:	descr = "A/V + VBI Mux Packet"; break;
1417	case V4L2_PIX_FMT_CIT_YYVYUY:	descr = "GSPCA CIT YYVYUY"; break;
1418	case V4L2_PIX_FMT_KONICA420:	descr = "GSPCA KONICA420"; break;
1419	case V4L2_PIX_FMT_MM21:		descr = "Mediatek 8-bit Block Format"; break;
1420	case V4L2_PIX_FMT_HSV24:	descr = "24-bit HSV 8-8-8"; break;
1421	case V4L2_PIX_FMT_HSV32:	descr = "32-bit XHSV 8-8-8-8"; break;
1422	case V4L2_SDR_FMT_CU8:		descr = "Complex U8"; break;
1423	case V4L2_SDR_FMT_CU16LE:	descr = "Complex U16LE"; break;
1424	case V4L2_SDR_FMT_CS8:		descr = "Complex S8"; break;
1425	case V4L2_SDR_FMT_CS14LE:	descr = "Complex S14LE"; break;
1426	case V4L2_SDR_FMT_RU12LE:	descr = "Real U12LE"; break;
1427	case V4L2_SDR_FMT_PCU16BE:	descr = "Planar Complex U16BE"; break;
1428	case V4L2_SDR_FMT_PCU18BE:	descr = "Planar Complex U18BE"; break;
1429	case V4L2_SDR_FMT_PCU20BE:	descr = "Planar Complex U20BE"; break;
1430	case V4L2_TCH_FMT_DELTA_TD16:	descr = "16-bit Signed Deltas"; break;
1431	case V4L2_TCH_FMT_DELTA_TD08:	descr = "8-bit Signed Deltas"; break;
1432	case V4L2_TCH_FMT_TU16:		descr = "16-bit Unsigned Touch Data"; break;
1433	case V4L2_TCH_FMT_TU08:		descr = "8-bit Unsigned Touch Data"; break;
1434	case V4L2_META_FMT_VSP1_HGO:	descr = "R-Car VSP1 1-D Histogram"; break;
1435	case V4L2_META_FMT_VSP1_HGT:	descr = "R-Car VSP1 2-D Histogram"; break;
1436	case V4L2_META_FMT_UVC:		descr = "UVC Payload Header Metadata"; break;
1437	case V4L2_META_FMT_D4XX:	descr = "Intel D4xx UVC Metadata"; break;
1438	case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
1439	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A Parameters"; break;
1440	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A Statistics"; break;
1441	case V4L2_PIX_FMT_NV12_8L128:	descr = "NV12 (8x128 Linear)"; break;
1442	case V4L2_PIX_FMT_NV12M_8L128:	descr = "NV12M (8x128 Linear)"; break;
1443	case V4L2_PIX_FMT_NV12_10BE_8L128:	descr = "10-bit NV12 (8x128 Linear, BE)"; break;
1444	case V4L2_PIX_FMT_NV12M_10BE_8L128:	descr = "10-bit NV12M (8x128 Linear, BE)"; break;
1445
1446	default:
1447		/* Compressed formats */
1448		flags = V4L2_FMT_FLAG_COMPRESSED;
1449		switch (fmt->pixelformat) {
1450		/* Max description length mask:	descr = "0123456789012345678901234567890" */
1451		case V4L2_PIX_FMT_MJPEG:	descr = "Motion-JPEG"; break;
1452		case V4L2_PIX_FMT_JPEG:		descr = "JFIF JPEG"; break;
1453		case V4L2_PIX_FMT_DV:		descr = "1394"; break;
1454		case V4L2_PIX_FMT_MPEG:		descr = "MPEG-1/2/4"; break;
1455		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
1456		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
1457		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
1458		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
1459		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
1460		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
1461		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
1462		case V4L2_PIX_FMT_MPEG2_SLICE:	descr = "MPEG-2 Parsed Slice Data"; break;
1463		case V4L2_PIX_FMT_MPEG4:	descr = "MPEG-4 Part 2 ES"; break;
1464		case V4L2_PIX_FMT_XVID:		descr = "Xvid"; break;
1465		case V4L2_PIX_FMT_VC1_ANNEX_G:	descr = "VC-1 (SMPTE 412M Annex G)"; break;
1466		case V4L2_PIX_FMT_VC1_ANNEX_L:	descr = "VC-1 (SMPTE 412M Annex L)"; break;
1467		case V4L2_PIX_FMT_VP8:		descr = "VP8"; break;
1468		case V4L2_PIX_FMT_VP8_FRAME:    descr = "VP8 Frame"; break;
1469		case V4L2_PIX_FMT_VP9:		descr = "VP9"; break;
1470		case V4L2_PIX_FMT_VP9_FRAME:    descr = "VP9 Frame"; break;
1471		case V4L2_PIX_FMT_HEVC:		descr = "HEVC"; break; /* aka H.265 */
1472		case V4L2_PIX_FMT_HEVC_SLICE:	descr = "HEVC Parsed Slice Data"; break;
1473		case V4L2_PIX_FMT_FWHT:		descr = "FWHT"; break; /* used in vicodec */
1474		case V4L2_PIX_FMT_FWHT_STATELESS:	descr = "FWHT Stateless"; break; /* used in vicodec */
1475		case V4L2_PIX_FMT_CPIA1:	descr = "GSPCA CPiA YUV"; break;
1476		case V4L2_PIX_FMT_WNVA:		descr = "WNVA"; break;
1477		case V4L2_PIX_FMT_SN9C10X:	descr = "GSPCA SN9C10X"; break;
1478		case V4L2_PIX_FMT_PWC1:		descr = "Raw Philips Webcam Type (Old)"; break;
1479		case V4L2_PIX_FMT_PWC2:		descr = "Raw Philips Webcam Type (New)"; break;
1480		case V4L2_PIX_FMT_ET61X251:	descr = "GSPCA ET61X251"; break;
1481		case V4L2_PIX_FMT_SPCA561:	descr = "GSPCA SPCA561"; break;
1482		case V4L2_PIX_FMT_PAC207:	descr = "GSPCA PAC207"; break;
1483		case V4L2_PIX_FMT_MR97310A:	descr = "GSPCA MR97310A"; break;
1484		case V4L2_PIX_FMT_JL2005BCD:	descr = "GSPCA JL2005BCD"; break;
1485		case V4L2_PIX_FMT_SN9C2028:	descr = "GSPCA SN9C2028"; break;
1486		case V4L2_PIX_FMT_SQ905C:	descr = "GSPCA SQ905C"; break;
1487		case V4L2_PIX_FMT_PJPG:		descr = "GSPCA PJPG"; break;
1488		case V4L2_PIX_FMT_OV511:	descr = "GSPCA OV511"; break;
1489		case V4L2_PIX_FMT_OV518:	descr = "GSPCA OV518"; break;
1490		case V4L2_PIX_FMT_JPGL:		descr = "JPEG Lite"; break;
1491		case V4L2_PIX_FMT_SE401:	descr = "GSPCA SE401"; break;
1492		case V4L2_PIX_FMT_S5C_UYVY_JPG:	descr = "S5C73MX interleaved UYVY/JPEG"; break;
1493		case V4L2_PIX_FMT_MT21C:	descr = "Mediatek Compressed Format"; break;
1494		case V4L2_PIX_FMT_QC08C:	descr = "QCOM Compressed 8-bit Format"; break;
1495		case V4L2_PIX_FMT_QC10C:	descr = "QCOM Compressed 10-bit Format"; break;
1496		case V4L2_PIX_FMT_AJPG:		descr = "Aspeed JPEG"; break;
1497		default:
1498			if (fmt->description[0])
1499				return;
1500			WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1501			flags = 0;
1502			snprintf(fmt->description, sz, "%p4cc",
1503				 &fmt->pixelformat);
1504			break;
1505		}
1506	}
1507
1508	if (descr)
1509		WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1510	fmt->flags |= flags;
1511}
1512
1513static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1514				struct file *file, void *fh, void *arg)
1515{
1516	struct video_device *vdev = video_devdata(file);
1517	struct v4l2_fmtdesc *p = arg;
1518	int ret = check_fmt(file, p->type);
1519	u32 mbus_code;
1520	u32 cap_mask;
1521
1522	if (ret)
1523		return ret;
1524	ret = -EINVAL;
1525
1526	if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1527		p->mbus_code = 0;
1528
1529	mbus_code = p->mbus_code;
1530	memset_after(p, 0, type);
1531	p->mbus_code = mbus_code;
1532
1533	switch (p->type) {
1534	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1535	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1536		cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1537			   V4L2_CAP_VIDEO_M2M_MPLANE;
1538		if (!!(vdev->device_caps & cap_mask) !=
1539		    (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1540			break;
1541
1542		if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1543			break;
1544		ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1545		break;
1546	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1547		if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1548			break;
1549		ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1550		break;
1551	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1552	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1553		cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1554			   V4L2_CAP_VIDEO_M2M_MPLANE;
1555		if (!!(vdev->device_caps & cap_mask) !=
1556		    (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1557			break;
1558
1559		if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1560			break;
1561		ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1562		break;
1563	case V4L2_BUF_TYPE_SDR_CAPTURE:
1564		if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1565			break;
1566		ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1567		break;
1568	case V4L2_BUF_TYPE_SDR_OUTPUT:
1569		if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1570			break;
1571		ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1572		break;
1573	case V4L2_BUF_TYPE_META_CAPTURE:
1574		if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1575			break;
1576		ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1577		break;
1578	case V4L2_BUF_TYPE_META_OUTPUT:
1579		if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1580			break;
1581		ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1582		break;
1583	}
1584	if (ret == 0)
1585		v4l_fill_fmtdesc(p);
1586	return ret;
1587}
1588
1589static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1590{
1591	/*
1592	 * The v4l2_pix_format structure contains fields that make no sense for
1593	 * touch. Set them to default values in this case.
1594	 */
1595
1596	p->field = V4L2_FIELD_NONE;
1597	p->colorspace = V4L2_COLORSPACE_RAW;
1598	p->flags = 0;
1599	p->ycbcr_enc = 0;
1600	p->quantization = 0;
1601	p->xfer_func = 0;
1602}
1603
1604static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1605				struct file *file, void *fh, void *arg)
1606{
1607	struct v4l2_format *p = arg;
1608	struct video_device *vfd = video_devdata(file);
1609	int ret = check_fmt(file, p->type);
1610
1611	if (ret)
1612		return ret;
1613
1614	/*
1615	 * fmt can't be cleared for these overlay types due to the 'clips'
1616	 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1617	 * Those are provided by the user. So handle these two overlay types
1618	 * first, and then just do a simple memset for the other types.
1619	 */
1620	switch (p->type) {
1621	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1622	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1623		struct v4l2_clip *clips = p->fmt.win.clips;
1624		u32 clipcount = p->fmt.win.clipcount;
1625		void __user *bitmap = p->fmt.win.bitmap;
1626
1627		memset(&p->fmt, 0, sizeof(p->fmt));
1628		p->fmt.win.clips = clips;
1629		p->fmt.win.clipcount = clipcount;
1630		p->fmt.win.bitmap = bitmap;
1631		break;
1632	}
1633	default:
1634		memset(&p->fmt, 0, sizeof(p->fmt));
1635		break;
1636	}
1637
1638	switch (p->type) {
1639	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1640		if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1641			break;
1642		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1643		ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1644		/* just in case the driver zeroed it again */
1645		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1646		if (vfd->vfl_type == VFL_TYPE_TOUCH)
1647			v4l_pix_format_touch(&p->fmt.pix);
1648		return ret;
1649	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1650		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1651	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1652		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1653	case V4L2_BUF_TYPE_VBI_CAPTURE:
1654		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1655	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1656		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1657	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1658		if (unlikely(!ops->vidioc_g_fmt_vid_out))
1659			break;
1660		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1661		ret = ops->vidioc_g_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		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1667	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1668		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1669	case V4L2_BUF_TYPE_VBI_OUTPUT:
1670		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1671	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1672		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1673	case V4L2_BUF_TYPE_SDR_CAPTURE:
1674		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1675	case V4L2_BUF_TYPE_SDR_OUTPUT:
1676		return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1677	case V4L2_BUF_TYPE_META_CAPTURE:
1678		return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1679	case V4L2_BUF_TYPE_META_OUTPUT:
1680		return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1681	}
1682	return -EINVAL;
1683}
1684
1685static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1686				struct file *file, void *fh, void *arg)
1687{
1688	struct v4l2_format *p = arg;
1689	struct video_device *vfd = video_devdata(file);
1690	int ret = check_fmt(file, p->type);
1691	unsigned int i;
1692
1693	if (ret)
1694		return ret;
1695
1696	ret = v4l_enable_media_source(vfd);
1697	if (ret)
1698		return ret;
1699	v4l_sanitize_format(p);
1700
1701	switch (p->type) {
1702	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1703		if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1704			break;
1705		memset_after(p, 0, fmt.pix);
1706		ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1707		/* just in case the driver zeroed it again */
1708		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1709		if (vfd->vfl_type == VFL_TYPE_TOUCH)
1710			v4l_pix_format_touch(&p->fmt.pix);
1711		return ret;
1712	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1713		if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1714			break;
1715		memset_after(p, 0, fmt.pix_mp.xfer_func);
1716		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1717			memset_after(&p->fmt.pix_mp.plane_fmt[i],
1718				     0, bytesperline);
1719		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1720	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1721		if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1722			break;
1723		memset_after(p, 0, fmt.win);
1724		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1725	case V4L2_BUF_TYPE_VBI_CAPTURE:
1726		if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1727			break;
1728		memset_after(p, 0, fmt.vbi.flags);
1729		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1730	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1731		if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1732			break;
1733		memset_after(p, 0, fmt.sliced.io_size);
1734		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1735	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1736		if (unlikely(!ops->vidioc_s_fmt_vid_out))
1737			break;
1738		memset_after(p, 0, fmt.pix);
1739		ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1740		/* just in case the driver zeroed it again */
1741		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1742		return ret;
1743	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1744		if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1745			break;
1746		memset_after(p, 0, fmt.pix_mp.xfer_func);
1747		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1748			memset_after(&p->fmt.pix_mp.plane_fmt[i],
1749				     0, bytesperline);
1750		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1751	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1752		if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1753			break;
1754		memset_after(p, 0, fmt.win);
1755		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1756	case V4L2_BUF_TYPE_VBI_OUTPUT:
1757		if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1758			break;
1759		memset_after(p, 0, fmt.vbi.flags);
1760		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1761	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1762		if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1763			break;
1764		memset_after(p, 0, fmt.sliced.io_size);
1765		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1766	case V4L2_BUF_TYPE_SDR_CAPTURE:
1767		if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1768			break;
1769		memset_after(p, 0, fmt.sdr.buffersize);
1770		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1771	case V4L2_BUF_TYPE_SDR_OUTPUT:
1772		if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1773			break;
1774		memset_after(p, 0, fmt.sdr.buffersize);
1775		return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1776	case V4L2_BUF_TYPE_META_CAPTURE:
1777		if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1778			break;
1779		memset_after(p, 0, fmt.meta);
1780		return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1781	case V4L2_BUF_TYPE_META_OUTPUT:
1782		if (unlikely(!ops->vidioc_s_fmt_meta_out))
1783			break;
1784		memset_after(p, 0, fmt.meta);
1785		return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1786	}
1787	return -EINVAL;
1788}
1789
1790static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1791				struct file *file, void *fh, void *arg)
1792{
1793	struct v4l2_format *p = arg;
1794	struct video_device *vfd = video_devdata(file);
1795	int ret = check_fmt(file, p->type);
1796	unsigned int i;
1797
1798	if (ret)
1799		return ret;
1800
1801	v4l_sanitize_format(p);
1802
1803	switch (p->type) {
1804	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1805		if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1806			break;
1807		memset_after(p, 0, fmt.pix);
1808		ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1809		/* just in case the driver zeroed it again */
1810		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1811		if (vfd->vfl_type == VFL_TYPE_TOUCH)
1812			v4l_pix_format_touch(&p->fmt.pix);
1813		return ret;
1814	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1815		if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1816			break;
1817		memset_after(p, 0, fmt.pix_mp.xfer_func);
1818		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1819			memset_after(&p->fmt.pix_mp.plane_fmt[i],
1820				     0, bytesperline);
1821		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1822	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1823		if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1824			break;
1825		memset_after(p, 0, fmt.win);
1826		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1827	case V4L2_BUF_TYPE_VBI_CAPTURE:
1828		if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1829			break;
1830		memset_after(p, 0, fmt.vbi.flags);
1831		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1832	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1833		if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1834			break;
1835		memset_after(p, 0, fmt.sliced.io_size);
1836		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1837	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1838		if (unlikely(!ops->vidioc_try_fmt_vid_out))
1839			break;
1840		memset_after(p, 0, fmt.pix);
1841		ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1842		/* just in case the driver zeroed it again */
1843		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1844		return ret;
1845	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1846		if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1847			break;
1848		memset_after(p, 0, fmt.pix_mp.xfer_func);
1849		for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1850			memset_after(&p->fmt.pix_mp.plane_fmt[i],
1851				     0, bytesperline);
1852		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1853	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1854		if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1855			break;
1856		memset_after(p, 0, fmt.win);
1857		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1858	case V4L2_BUF_TYPE_VBI_OUTPUT:
1859		if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1860			break;
1861		memset_after(p, 0, fmt.vbi.flags);
1862		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1863	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1864		if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1865			break;
1866		memset_after(p, 0, fmt.sliced.io_size);
1867		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1868	case V4L2_BUF_TYPE_SDR_CAPTURE:
1869		if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1870			break;
1871		memset_after(p, 0, fmt.sdr.buffersize);
1872		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1873	case V4L2_BUF_TYPE_SDR_OUTPUT:
1874		if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1875			break;
1876		memset_after(p, 0, fmt.sdr.buffersize);
1877		return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1878	case V4L2_BUF_TYPE_META_CAPTURE:
1879		if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1880			break;
1881		memset_after(p, 0, fmt.meta);
1882		return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1883	case V4L2_BUF_TYPE_META_OUTPUT:
1884		if (unlikely(!ops->vidioc_try_fmt_meta_out))
1885			break;
1886		memset_after(p, 0, fmt.meta);
1887		return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1888	}
1889	return -EINVAL;
1890}
1891
1892static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1893				struct file *file, void *fh, void *arg)
1894{
1895	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1896}
1897
1898static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1899				struct file *file, void *fh, void *arg)
1900{
1901	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1902}
1903
1904static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1905				struct file *file, void *fh, void *arg)
1906{
1907	struct video_device *vfd = video_devdata(file);
1908	struct v4l2_tuner *p = arg;
1909	int err;
1910
1911	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1912			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1913	err = ops->vidioc_g_tuner(file, fh, p);
1914	if (!err)
1915		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1916	return err;
1917}
1918
1919static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1920				struct file *file, void *fh, void *arg)
1921{
1922	struct video_device *vfd = video_devdata(file);
1923	struct v4l2_tuner *p = arg;
1924	int ret;
1925
1926	ret = v4l_enable_media_source(vfd);
1927	if (ret)
1928		return ret;
1929	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1930			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1931	return ops->vidioc_s_tuner(file, fh, p);
1932}
1933
1934static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1935				struct file *file, void *fh, void *arg)
1936{
1937	struct video_device *vfd = video_devdata(file);
1938	struct v4l2_modulator *p = arg;
1939	int err;
1940
1941	if (vfd->vfl_type == VFL_TYPE_RADIO)
1942		p->type = V4L2_TUNER_RADIO;
1943
1944	err = ops->vidioc_g_modulator(file, fh, p);
1945	if (!err)
1946		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1947	return err;
1948}
1949
1950static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1951				struct file *file, void *fh, void *arg)
1952{
1953	struct video_device *vfd = video_devdata(file);
1954	struct v4l2_modulator *p = arg;
1955
1956	if (vfd->vfl_type == VFL_TYPE_RADIO)
1957		p->type = V4L2_TUNER_RADIO;
1958
1959	return ops->vidioc_s_modulator(file, fh, p);
1960}
1961
1962static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1963				struct file *file, void *fh, void *arg)
1964{
1965	struct video_device *vfd = video_devdata(file);
1966	struct v4l2_frequency *p = arg;
1967
1968	if (vfd->vfl_type == VFL_TYPE_SDR)
1969		p->type = V4L2_TUNER_SDR;
1970	else
1971		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1972				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1973	return ops->vidioc_g_frequency(file, fh, p);
1974}
1975
1976static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1977				struct file *file, void *fh, void *arg)
1978{
1979	struct video_device *vfd = video_devdata(file);
1980	const struct v4l2_frequency *p = arg;
1981	enum v4l2_tuner_type type;
1982	int ret;
1983
1984	ret = v4l_enable_media_source(vfd);
1985	if (ret)
1986		return ret;
1987	if (vfd->vfl_type == VFL_TYPE_SDR) {
1988		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1989			return -EINVAL;
1990	} else {
1991		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1992				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1993		if (type != p->type)
1994			return -EINVAL;
1995	}
1996	return ops->vidioc_s_frequency(file, fh, p);
1997}
1998
1999static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
2000				struct file *file, void *fh, void *arg)
2001{
2002	struct video_device *vfd = video_devdata(file);
2003	struct v4l2_standard *p = arg;
2004
2005	return v4l_video_std_enumstd(p, vfd->tvnorms);
2006}
2007
2008static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
2009				struct file *file, void *fh, void *arg)
2010{
2011	struct video_device *vfd = video_devdata(file);
2012	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
2013	int ret;
2014
2015	ret = v4l_enable_media_source(vfd);
2016	if (ret)
2017		return ret;
2018	norm = id & vfd->tvnorms;
2019	if (vfd->tvnorms && !norm)	/* Check if std is supported */
2020		return -EINVAL;
2021
2022	/* Calls the specific handler */
2023	return ops->vidioc_s_std(file, fh, norm);
2024}
2025
2026static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
2027				struct file *file, void *fh, void *arg)
2028{
2029	struct video_device *vfd = video_devdata(file);
2030	v4l2_std_id *p = arg;
2031	int ret;
2032
2033	ret = v4l_enable_media_source(vfd);
2034	if (ret)
2035		return ret;
2036	/*
2037	 * If no signal is detected, then the driver should return
2038	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2039	 * any standards that do not apply removed.
2040	 *
2041	 * This means that tuners, audio and video decoders can join
2042	 * their efforts to improve the standards detection.
2043	 */
2044	*p = vfd->tvnorms;
2045	return ops->vidioc_querystd(file, fh, arg);
2046}
2047
2048static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2049				struct file *file, void *fh, void *arg)
2050{
2051	struct video_device *vfd = video_devdata(file);
2052	struct v4l2_hw_freq_seek *p = arg;
2053	enum v4l2_tuner_type type;
2054	int ret;
2055
2056	ret = v4l_enable_media_source(vfd);
2057	if (ret)
2058		return ret;
2059	/* s_hw_freq_seek is not supported for SDR for now */
2060	if (vfd->vfl_type == VFL_TYPE_SDR)
2061		return -EINVAL;
2062
2063	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2064		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2065	if (p->type != type)
2066		return -EINVAL;
2067	return ops->vidioc_s_hw_freq_seek(file, fh, p);
2068}
2069
2070static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2071				struct file *file, void *fh, void *arg)
2072{
2073	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2074}
2075
2076static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2077				struct file *file, void *fh, void *arg)
2078{
2079	struct v4l2_requestbuffers *p = arg;
2080	int ret = check_fmt(file, p->type);
2081
2082	if (ret)
2083		return ret;
2084
2085	memset_after(p, 0, flags);
2086
2087	return ops->vidioc_reqbufs(file, fh, p);
2088}
2089
2090static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2091				struct file *file, void *fh, void *arg)
2092{
2093	struct v4l2_buffer *p = arg;
2094	int ret = check_fmt(file, p->type);
2095
2096	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2097}
2098
2099static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2100				struct file *file, void *fh, void *arg)
2101{
2102	struct v4l2_buffer *p = arg;
2103	int ret = check_fmt(file, p->type);
2104
2105	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2106}
2107
2108static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2109				struct file *file, void *fh, void *arg)
2110{
2111	struct v4l2_buffer *p = arg;
2112	int ret = check_fmt(file, p->type);
2113
2114	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2115}
2116
2117static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2118				struct file *file, void *fh, void *arg)
2119{
2120	struct v4l2_create_buffers *create = arg;
2121	int ret = check_fmt(file, create->format.type);
2122
2123	if (ret)
2124		return ret;
2125
2126	memset_after(create, 0, flags);
2127
2128	v4l_sanitize_format(&create->format);
2129
2130	ret = ops->vidioc_create_bufs(file, fh, create);
2131
2132	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2133	    create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2134		create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2135
2136	return ret;
2137}
2138
2139static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2140				struct file *file, void *fh, void *arg)
2141{
2142	struct v4l2_buffer *b = arg;
2143	int ret = check_fmt(file, b->type);
2144
2145	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2146}
2147
2148static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2149				struct file *file, void *fh, void *arg)
2150{
2151	struct video_device *vfd = video_devdata(file);
2152	struct v4l2_streamparm *p = arg;
2153	v4l2_std_id std;
2154	int ret = check_fmt(file, p->type);
2155
2156	if (ret)
2157		return ret;
2158	if (ops->vidioc_g_parm)
2159		return ops->vidioc_g_parm(file, fh, p);
2160	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2161	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2162		return -EINVAL;
2163	if (vfd->device_caps & V4L2_CAP_READWRITE)
2164		p->parm.capture.readbuffers = 2;
2165	ret = ops->vidioc_g_std(file, fh, &std);
2166	if (ret == 0)
2167		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2168	return ret;
2169}
2170
2171static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2172				struct file *file, void *fh, void *arg)
2173{
2174	struct v4l2_streamparm *p = arg;
2175	int ret = check_fmt(file, p->type);
2176
2177	if (ret)
2178		return ret;
2179
2180	/* Note: extendedmode is never used in drivers */
2181	if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2182		memset(p->parm.output.reserved, 0,
2183		       sizeof(p->parm.output.reserved));
2184		p->parm.output.extendedmode = 0;
2185		p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2186	} else {
2187		memset(p->parm.capture.reserved, 0,
2188		       sizeof(p->parm.capture.reserved));
2189		p->parm.capture.extendedmode = 0;
2190		p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2191	}
2192	return ops->vidioc_s_parm(file, fh, p);
2193}
2194
2195static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2196				struct file *file, void *fh, void *arg)
2197{
2198	struct video_device *vfd = video_devdata(file);
2199	struct v4l2_queryctrl *p = arg;
2200	struct v4l2_fh *vfh =
2201		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2202
2203	if (vfh && vfh->ctrl_handler)
2204		return v4l2_queryctrl(vfh->ctrl_handler, p);
2205	if (vfd->ctrl_handler)
2206		return v4l2_queryctrl(vfd->ctrl_handler, p);
2207	if (ops->vidioc_queryctrl)
2208		return ops->vidioc_queryctrl(file, fh, p);
2209	return -ENOTTY;
2210}
2211
2212static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2213				struct file *file, void *fh, void *arg)
2214{
2215	struct video_device *vfd = video_devdata(file);
2216	struct v4l2_query_ext_ctrl *p = arg;
2217	struct v4l2_fh *vfh =
2218		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2219
2220	if (vfh && vfh->ctrl_handler)
2221		return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2222	if (vfd->ctrl_handler)
2223		return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2224	if (ops->vidioc_query_ext_ctrl)
2225		return ops->vidioc_query_ext_ctrl(file, fh, p);
2226	return -ENOTTY;
2227}
2228
2229static int v4l_querymenu(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_querymenu *p = arg;
2234	struct v4l2_fh *vfh =
2235		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2236
2237	if (vfh && vfh->ctrl_handler)
2238		return v4l2_querymenu(vfh->ctrl_handler, p);
2239	if (vfd->ctrl_handler)
2240		return v4l2_querymenu(vfd->ctrl_handler, p);
2241	if (ops->vidioc_querymenu)
2242		return ops->vidioc_querymenu(file, fh, p);
2243	return -ENOTTY;
2244}
2245
2246static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2247				struct file *file, void *fh, void *arg)
2248{
2249	struct video_device *vfd = video_devdata(file);
2250	struct v4l2_control *p = arg;
2251	struct v4l2_fh *vfh =
2252		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2253	struct v4l2_ext_controls ctrls;
2254	struct v4l2_ext_control ctrl;
2255
2256	if (vfh && vfh->ctrl_handler)
2257		return v4l2_g_ctrl(vfh->ctrl_handler, p);
2258	if (vfd->ctrl_handler)
2259		return v4l2_g_ctrl(vfd->ctrl_handler, p);
2260	if (ops->vidioc_g_ctrl)
2261		return ops->vidioc_g_ctrl(file, fh, p);
2262	if (ops->vidioc_g_ext_ctrls == NULL)
2263		return -ENOTTY;
2264
2265	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2266	ctrls.count = 1;
2267	ctrls.controls = &ctrl;
2268	ctrl.id = p->id;
2269	ctrl.value = p->value;
2270	if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
2271		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2272
2273		if (ret == 0)
2274			p->value = ctrl.value;
2275		return ret;
2276	}
2277	return -EINVAL;
2278}
2279
2280static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2281				struct file *file, void *fh, void *arg)
2282{
2283	struct video_device *vfd = video_devdata(file);
2284	struct v4l2_control *p = arg;
2285	struct v4l2_fh *vfh =
2286		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2287	struct v4l2_ext_controls ctrls;
2288	struct v4l2_ext_control ctrl;
2289	int ret;
2290
2291	if (vfh && vfh->ctrl_handler)
2292		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2293	if (vfd->ctrl_handler)
2294		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2295	if (ops->vidioc_s_ctrl)
2296		return ops->vidioc_s_ctrl(file, fh, p);
2297	if (ops->vidioc_s_ext_ctrls == NULL)
2298		return -ENOTTY;
2299
2300	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2301	ctrls.count = 1;
2302	ctrls.controls = &ctrl;
2303	ctrl.id = p->id;
2304	ctrl.value = p->value;
2305	if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
2306		return -EINVAL;
2307	ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2308	p->value = ctrl.value;
2309	return ret;
2310}
2311
2312static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2313				struct file *file, void *fh, void *arg)
2314{
2315	struct video_device *vfd = video_devdata(file);
2316	struct v4l2_ext_controls *p = arg;
2317	struct v4l2_fh *vfh =
2318		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2319
2320	p->error_idx = p->count;
2321	if (vfh && vfh->ctrl_handler)
2322		return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2323					vfd, vfd->v4l2_dev->mdev, p);
2324	if (vfd->ctrl_handler)
2325		return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2326					vfd, vfd->v4l2_dev->mdev, p);
2327	if (ops->vidioc_g_ext_ctrls == NULL)
2328		return -ENOTTY;
2329	return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
2330				ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL;
2331}
2332
2333static int v4l_s_ext_ctrls(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_ext_controls *p = arg;
2338	struct v4l2_fh *vfh =
2339		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2340
2341	p->error_idx = p->count;
2342	if (vfh && vfh->ctrl_handler)
2343		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2344					vfd, vfd->v4l2_dev->mdev, p);
2345	if (vfd->ctrl_handler)
2346		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2347					vfd, vfd->v4l2_dev->mdev, p);
2348	if (ops->vidioc_s_ext_ctrls == NULL)
2349		return -ENOTTY;
2350	return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
2351				ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL;
2352}
2353
2354static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2355				struct file *file, void *fh, void *arg)
2356{
2357	struct video_device *vfd = video_devdata(file);
2358	struct v4l2_ext_controls *p = arg;
2359	struct v4l2_fh *vfh =
2360		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2361
2362	p->error_idx = p->count;
2363	if (vfh && vfh->ctrl_handler)
2364		return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2365					  vfd, vfd->v4l2_dev->mdev, p);
2366	if (vfd->ctrl_handler)
2367		return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2368					  vfd, vfd->v4l2_dev->mdev, p);
2369	if (ops->vidioc_try_ext_ctrls == NULL)
2370		return -ENOTTY;
2371	return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
2372			ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
2373}
2374
2375/*
2376 * The selection API specified originally that the _MPLANE buffer types
2377 * shouldn't be used. The reasons for this are lost in the mists of time
2378 * (or just really crappy memories). Regardless, this is really annoying
2379 * for userspace. So to keep things simple we map _MPLANE buffer types
2380 * to their 'regular' counterparts before calling the driver. And we
2381 * restore it afterwards. This way applications can use either buffer
2382 * type and drivers don't need to check for both.
2383 */
2384static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2385			   struct file *file, void *fh, void *arg)
2386{
2387	struct v4l2_selection *p = arg;
2388	u32 old_type = p->type;
2389	int ret;
2390
2391	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2392		p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2393	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2394		p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2395	ret = ops->vidioc_g_selection(file, fh, p);
2396	p->type = old_type;
2397	return ret;
2398}
2399
2400static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2401			   struct file *file, void *fh, void *arg)
2402{
2403	struct v4l2_selection *p = arg;
2404	u32 old_type = p->type;
2405	int ret;
2406
2407	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2408		p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2409	else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2410		p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2411	ret = ops->vidioc_s_selection(file, fh, p);
2412	p->type = old_type;
2413	return ret;
2414}
2415
2416static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2417				struct file *file, void *fh, void *arg)
2418{
2419	struct video_device *vfd = video_devdata(file);
2420	struct v4l2_crop *p = arg;
2421	struct v4l2_selection s = {
2422		.type = p->type,
2423	};
2424	int ret;
2425
2426	/* simulate capture crop using selection api */
2427
2428	/* crop means compose for output devices */
2429	if (V4L2_TYPE_IS_OUTPUT(p->type))
2430		s.target = V4L2_SEL_TGT_COMPOSE;
2431	else
2432		s.target = V4L2_SEL_TGT_CROP;
2433
2434	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2435		s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2436			V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2437
2438	ret = v4l_g_selection(ops, file, fh, &s);
2439
2440	/* copying results to old structure on success */
2441	if (!ret)
2442		p->c = s.r;
2443	return ret;
2444}
2445
2446static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2447				struct file *file, void *fh, void *arg)
2448{
2449	struct video_device *vfd = video_devdata(file);
2450	struct v4l2_crop *p = arg;
2451	struct v4l2_selection s = {
2452		.type = p->type,
2453		.r = p->c,
2454	};
2455
2456	/* simulate capture crop using selection api */
2457
2458	/* crop means compose for output devices */
2459	if (V4L2_TYPE_IS_OUTPUT(p->type))
2460		s.target = V4L2_SEL_TGT_COMPOSE;
2461	else
2462		s.target = V4L2_SEL_TGT_CROP;
2463
2464	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2465		s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2466			V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2467
2468	return v4l_s_selection(ops, file, fh, &s);
2469}
2470
2471static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2472				struct file *file, void *fh, void *arg)
2473{
2474	struct video_device *vfd = video_devdata(file);
2475	struct v4l2_cropcap *p = arg;
2476	struct v4l2_selection s = { .type = p->type };
2477	int ret = 0;
2478
2479	/* setting trivial pixelaspect */
2480	p->pixelaspect.numerator = 1;
2481	p->pixelaspect.denominator = 1;
2482
2483	if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2484		s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2485	else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2486		s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2487
2488	/*
2489	 * The determine_valid_ioctls() call already should ensure
2490	 * that this can never happen, but just in case...
2491	 */
2492	if (WARN_ON(!ops->vidioc_g_selection))
2493		return -ENOTTY;
2494
2495	if (ops->vidioc_g_pixelaspect)
2496		ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2497						&p->pixelaspect);
2498
2499	/*
2500	 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2501	 * square pixel aspect ratio in that case.
2502	 */
2503	if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2504		return ret;
2505
2506	/* Use g_selection() to fill in the bounds and defrect rectangles */
2507
2508	/* obtaining bounds */
2509	if (V4L2_TYPE_IS_OUTPUT(p->type))
2510		s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2511	else
2512		s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2513
2514	if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2515		s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2516			V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2517
2518	ret = v4l_g_selection(ops, file, fh, &s);
2519	if (ret)
2520		return ret;
2521	p->bounds = s.r;
2522
2523	/* obtaining defrect */
2524	if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2525		s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2526	else
2527		s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2528
2529	ret = v4l_g_selection(ops, file, fh, &s);
2530	if (ret)
2531		return ret;
2532	p->defrect = s.r;
2533
2534	return 0;
2535}
2536
2537static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2538				struct file *file, void *fh, void *arg)
2539{
2540	struct video_device *vfd = video_devdata(file);
2541	int ret;
2542
2543	if (vfd->v4l2_dev)
2544		pr_info("%s: =================  START STATUS  =================\n",
2545			vfd->v4l2_dev->name);
2546	ret = ops->vidioc_log_status(file, fh);
2547	if (vfd->v4l2_dev)
2548		pr_info("%s: ==================  END STATUS  ==================\n",
2549			vfd->v4l2_dev->name);
2550	return ret;
2551}
2552
2553static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2554				struct file *file, void *fh, void *arg)
2555{
2556#ifdef CONFIG_VIDEO_ADV_DEBUG
2557	struct v4l2_dbg_register *p = arg;
2558	struct video_device *vfd = video_devdata(file);
2559	struct v4l2_subdev *sd;
2560	int idx = 0;
2561
2562	if (!capable(CAP_SYS_ADMIN))
2563		return -EPERM;
2564	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2565		if (vfd->v4l2_dev == NULL)
2566			return -EINVAL;
2567		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2568			if (p->match.addr == idx++)
2569				return v4l2_subdev_call(sd, core, g_register, p);
2570		return -EINVAL;
2571	}
2572	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2573	    (ops->vidioc_g_chip_info || p->match.addr == 0))
2574		return ops->vidioc_g_register(file, fh, p);
2575	return -EINVAL;
2576#else
2577	return -ENOTTY;
2578#endif
2579}
2580
2581static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2582				struct file *file, void *fh, void *arg)
2583{
2584#ifdef CONFIG_VIDEO_ADV_DEBUG
2585	const struct v4l2_dbg_register *p = arg;
2586	struct video_device *vfd = video_devdata(file);
2587	struct v4l2_subdev *sd;
2588	int idx = 0;
2589
2590	if (!capable(CAP_SYS_ADMIN))
2591		return -EPERM;
2592	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2593		if (vfd->v4l2_dev == NULL)
2594			return -EINVAL;
2595		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2596			if (p->match.addr == idx++)
2597				return v4l2_subdev_call(sd, core, s_register, p);
2598		return -EINVAL;
2599	}
2600	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2601	    (ops->vidioc_g_chip_info || p->match.addr == 0))
2602		return ops->vidioc_s_register(file, fh, p);
2603	return -EINVAL;
2604#else
2605	return -ENOTTY;
2606#endif
2607}
2608
2609static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2610				struct file *file, void *fh, void *arg)
2611{
2612#ifdef CONFIG_VIDEO_ADV_DEBUG
2613	struct video_device *vfd = video_devdata(file);
2614	struct v4l2_dbg_chip_info *p = arg;
2615	struct v4l2_subdev *sd;
2616	int idx = 0;
2617
2618	switch (p->match.type) {
2619	case V4L2_CHIP_MATCH_BRIDGE:
2620		if (ops->vidioc_s_register)
2621			p->flags |= V4L2_CHIP_FL_WRITABLE;
2622		if (ops->vidioc_g_register)
2623			p->flags |= V4L2_CHIP_FL_READABLE;
2624		strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2625		if (ops->vidioc_g_chip_info)
2626			return ops->vidioc_g_chip_info(file, fh, arg);
2627		if (p->match.addr)
2628			return -EINVAL;
2629		return 0;
2630
2631	case V4L2_CHIP_MATCH_SUBDEV:
2632		if (vfd->v4l2_dev == NULL)
2633			break;
2634		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2635			if (p->match.addr != idx++)
2636				continue;
2637			if (sd->ops->core && sd->ops->core->s_register)
2638				p->flags |= V4L2_CHIP_FL_WRITABLE;
2639			if (sd->ops->core && sd->ops->core->g_register)
2640				p->flags |= V4L2_CHIP_FL_READABLE;
2641			strscpy(p->name, sd->name, sizeof(p->name));
2642			return 0;
2643		}
2644		break;
2645	}
2646	return -EINVAL;
2647#else
2648	return -ENOTTY;
2649#endif
2650}
2651
2652static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2653				struct file *file, void *fh, void *arg)
2654{
2655	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2656}
2657
2658static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2659				struct file *file, void *fh, void *arg)
2660{
2661	return ops->vidioc_subscribe_event(fh, arg);
2662}
2663
2664static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2665				struct file *file, void *fh, void *arg)
2666{
2667	return ops->vidioc_unsubscribe_event(fh, arg);
2668}
2669
2670static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2671				struct file *file, void *fh, void *arg)
2672{
2673	struct v4l2_sliced_vbi_cap *p = arg;
2674	int ret = check_fmt(file, p->type);
2675
2676	if (ret)
2677		return ret;
2678
2679	/* Clear up to type, everything after type is zeroed already */
2680	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2681
2682	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2683}
2684
2685static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2686				struct file *file, void *fh, void *arg)
2687{
2688	struct video_device *vfd = video_devdata(file);
2689	struct v4l2_frequency_band *p = arg;
2690	enum v4l2_tuner_type type;
2691	int err;
2692
2693	if (vfd->vfl_type == VFL_TYPE_SDR) {
2694		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2695			return -EINVAL;
2696		type = p->type;
2697	} else {
2698		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2699				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2700		if (type != p->type)
2701			return -EINVAL;
2702	}
2703	if (ops->vidioc_enum_freq_bands) {
2704		err = ops->vidioc_enum_freq_bands(file, fh, p);
2705		if (err != -ENOTTY)
2706			return err;
2707	}
2708	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2709		struct v4l2_tuner t = {
2710			.index = p->tuner,
2711			.type = type,
2712		};
2713
2714		if (p->index)
2715			return -EINVAL;
2716		err = ops->vidioc_g_tuner(file, fh, &t);
2717		if (err)
2718			return err;
2719		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2720		p->rangelow = t.rangelow;
2721		p->rangehigh = t.rangehigh;
2722		p->modulation = (type == V4L2_TUNER_RADIO) ?
2723			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2724		return 0;
2725	}
2726	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2727		struct v4l2_modulator m = {
2728			.index = p->tuner,
2729		};
2730
2731		if (type != V4L2_TUNER_RADIO)
2732			return -EINVAL;
2733		if (p->index)
2734			return -EINVAL;
2735		err = ops->vidioc_g_modulator(file, fh, &m);
2736		if (err)
2737			return err;
2738		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2739		p->rangelow = m.rangelow;
2740		p->rangehigh = m.rangehigh;
2741		p->modulation = (type == V4L2_TUNER_RADIO) ?
2742			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2743		return 0;
2744	}
2745	return -ENOTTY;
2746}
2747
2748struct v4l2_ioctl_info {
2749	unsigned int ioctl;
2750	u32 flags;
2751	const char * const name;
2752	int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2753		    void *fh, void *p);
2754	void (*debug)(const void *arg, bool write_only);
2755};
2756
2757/* This control needs a priority check */
2758#define INFO_FL_PRIO		(1 << 0)
2759/* This control can be valid if the filehandle passes a control handler. */
2760#define INFO_FL_CTRL		(1 << 1)
2761/* Queuing ioctl */
2762#define INFO_FL_QUEUE		(1 << 2)
2763/* Always copy back result, even on error */
2764#define INFO_FL_ALWAYS_COPY	(1 << 3)
2765/* Zero struct from after the field to the end */
2766#define INFO_FL_CLEAR(v4l2_struct, field)			\
2767	((offsetof(struct v4l2_struct, field) +			\
2768	  sizeof_field(struct v4l2_struct, field)) << 16)
2769#define INFO_FL_CLEAR_MASK	(_IOC_SIZEMASK << 16)
2770
2771#define DEFINE_V4L_STUB_FUNC(_vidioc)				\
2772	static int v4l_stub_ ## _vidioc(			\
2773			const struct v4l2_ioctl_ops *ops,	\
2774			struct file *file, void *fh, void *p)	\
2775	{							\
2776		return ops->vidioc_ ## _vidioc(file, fh, p);	\
2777	}
2778
2779#define IOCTL_INFO(_ioctl, _func, _debug, _flags)		\
2780	[_IOC_NR(_ioctl)] = {					\
2781		.ioctl = _ioctl,				\
2782		.flags = _flags,				\
2783		.name = #_ioctl,				\
2784		.func = _func,					\
2785		.debug = _debug,				\
2786	}
2787
2788DEFINE_V4L_STUB_FUNC(g_fbuf)
2789DEFINE_V4L_STUB_FUNC(s_fbuf)
2790DEFINE_V4L_STUB_FUNC(expbuf)
2791DEFINE_V4L_STUB_FUNC(g_std)
2792DEFINE_V4L_STUB_FUNC(g_audio)
2793DEFINE_V4L_STUB_FUNC(s_audio)
2794DEFINE_V4L_STUB_FUNC(g_edid)
2795DEFINE_V4L_STUB_FUNC(s_edid)
2796DEFINE_V4L_STUB_FUNC(g_audout)
2797DEFINE_V4L_STUB_FUNC(s_audout)
2798DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2799DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2800DEFINE_V4L_STUB_FUNC(enumaudio)
2801DEFINE_V4L_STUB_FUNC(enumaudout)
2802DEFINE_V4L_STUB_FUNC(enum_framesizes)
2803DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2804DEFINE_V4L_STUB_FUNC(g_enc_index)
2805DEFINE_V4L_STUB_FUNC(encoder_cmd)
2806DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2807DEFINE_V4L_STUB_FUNC(decoder_cmd)
2808DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2809DEFINE_V4L_STUB_FUNC(s_dv_timings)
2810DEFINE_V4L_STUB_FUNC(g_dv_timings)
2811DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2812DEFINE_V4L_STUB_FUNC(query_dv_timings)
2813DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2814
2815static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2816	IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2817	IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2818	IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2819	IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2820	IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2821	IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2822	IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2823	IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2824	IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2825	IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2826	IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2827	IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2828	IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2829	IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2830	IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2831	IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2832	IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2833	IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2834	IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2835	IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2836	IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2837	IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2838	IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2839	IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2840	IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2841	IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2842	IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2843	IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2844	IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2845	IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2846	IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2847	IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2848	IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2849	IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2850	IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2851	IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2852	IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2853	IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2854	IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2855	IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2856	IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2857	IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2858	IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2859	IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2860	IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2861	IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2862	IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2863	IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2864	IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2865	IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2866	IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2867	IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2868	IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2869	IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2870	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)),
2871	IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2872	IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2873	IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2874	IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
2875	IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2876	IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2877	IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2878	IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2879	IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2880	IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2881	IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2882	IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2883	IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2884	IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2885	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)),
2886	IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2887	IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2888	IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2889	IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2890	IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2891	IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2892	IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2893	IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2894	IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2895	IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2896	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)),
2897	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)),
2898};
2899#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2900
2901static bool v4l2_is_known_ioctl(unsigned int cmd)
2902{
2903	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2904		return false;
2905	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2906}
2907
2908static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2909					 struct v4l2_fh *vfh, unsigned int cmd,
2910					 void *arg)
2911{
2912	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2913		return vdev->lock;
2914	if (vfh && vfh->m2m_ctx &&
2915	    (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2916		if (vfh->m2m_ctx->q_lock)
2917			return vfh->m2m_ctx->q_lock;
2918	}
2919	if (vdev->queue && vdev->queue->lock &&
2920			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2921		return vdev->queue->lock;
2922	return vdev->lock;
2923}
2924
2925/* Common ioctl debug function. This function can be used by
2926   external ioctl messages as well as internal V4L ioctl */
2927void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2928{
2929	const char *dir, *type;
2930
2931	if (prefix)
2932		printk(KERN_DEBUG "%s: ", prefix);
2933
2934	switch (_IOC_TYPE(cmd)) {
2935	case 'd':
2936		type = "v4l2_int";
2937		break;
2938	case 'V':
2939		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2940			type = "v4l2";
2941			break;
2942		}
2943		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2944		return;
2945	default:
2946		type = "unknown";
2947		break;
2948	}
2949
2950	switch (_IOC_DIR(cmd)) {
2951	case _IOC_NONE:              dir = "--"; break;
2952	case _IOC_READ:              dir = "r-"; break;
2953	case _IOC_WRITE:             dir = "-w"; break;
2954	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2955	default:                     dir = "*ERR*"; break;
2956	}
2957	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2958		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2959}
2960EXPORT_SYMBOL(v4l_printk_ioctl);
2961
2962static long __video_do_ioctl(struct file *file,
2963		unsigned int cmd, void *arg)
2964{
2965	struct video_device *vfd = video_devdata(file);
2966	struct mutex *req_queue_lock = NULL;
2967	struct mutex *lock; /* ioctl serialization mutex */
2968	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2969	bool write_only = false;
2970	struct v4l2_ioctl_info default_info;
2971	const struct v4l2_ioctl_info *info;
2972	void *fh = file->private_data;
2973	struct v4l2_fh *vfh = NULL;
2974	int dev_debug = vfd->dev_debug;
2975	long ret = -ENOTTY;
2976
2977	if (ops == NULL) {
2978		pr_warn("%s: has no ioctl_ops.\n",
2979				video_device_node_name(vfd));
2980		return ret;
2981	}
2982
2983	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2984		vfh = file->private_data;
2985
2986	/*
2987	 * We need to serialize streamon/off with queueing new requests.
2988	 * These ioctls may trigger the cancellation of a streaming
2989	 * operation, and that should not be mixed with queueing a new
2990	 * request at the same time.
2991	 */
2992	if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2993	    (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2994		req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2995
2996		if (mutex_lock_interruptible(req_queue_lock))
2997			return -ERESTARTSYS;
2998	}
2999
3000	lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
3001
3002	if (lock && mutex_lock_interruptible(lock)) {
3003		if (req_queue_lock)
3004			mutex_unlock(req_queue_lock);
3005		return -ERESTARTSYS;
3006	}
3007
3008	if (!video_is_registered(vfd)) {
3009		ret = -ENODEV;
3010		goto unlock;
3011	}
3012
3013	if (v4l2_is_known_ioctl(cmd)) {
3014		info = &v4l2_ioctls[_IOC_NR(cmd)];
3015
3016		if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
3017		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
3018			goto done;
3019
3020		if (vfh && (info->flags & INFO_FL_PRIO)) {
3021			ret = v4l2_prio_check(vfd->prio, vfh->prio);
3022			if (ret)
3023				goto done;
3024		}
3025	} else {
3026		default_info.ioctl = cmd;
3027		default_info.flags = 0;
3028		default_info.debug = v4l_print_default;
3029		info = &default_info;
3030	}
3031
3032	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
3033	if (info != &default_info) {
3034		ret = info->func(ops, file, fh, arg);
3035	} else if (!ops->vidioc_default) {
3036		ret = -ENOTTY;
3037	} else {
3038		ret = ops->vidioc_default(file, fh,
3039			vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
3040			cmd, arg);
3041	}
3042
3043done:
3044	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3045		if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3046		    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3047			goto unlock;
3048
3049		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3050		if (ret < 0)
3051			pr_cont(": error %ld", ret);
3052		if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3053			pr_cont("\n");
3054		else if (_IOC_DIR(cmd) == _IOC_NONE)
3055			info->debug(arg, write_only);
3056		else {
3057			pr_cont(": ");
3058			info->debug(arg, write_only);
3059		}
3060	}
3061
3062unlock:
3063	if (lock)
3064		mutex_unlock(lock);
3065	if (req_queue_lock)
3066		mutex_unlock(req_queue_lock);
3067	return ret;
3068}
3069
3070static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3071			    void __user **user_ptr, void ***kernel_ptr)
3072{
3073	int ret = 0;
3074
3075	switch (cmd) {
3076	case VIDIOC_PREPARE_BUF:
3077	case VIDIOC_QUERYBUF:
3078	case VIDIOC_QBUF:
3079	case VIDIOC_DQBUF: {
3080		struct v4l2_buffer *buf = parg;
3081
3082		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3083			if (buf->length > VIDEO_MAX_PLANES) {
3084				ret = -EINVAL;
3085				break;
3086			}
3087			*user_ptr = (void __user *)buf->m.planes;
3088			*kernel_ptr = (void **)&buf->m.planes;
3089			*array_size = sizeof(struct v4l2_plane) * buf->length;
3090			ret = 1;
3091		}
3092		break;
3093	}
3094
3095	case VIDIOC_G_EDID:
3096	case VIDIOC_S_EDID: {
3097		struct v4l2_edid *edid = parg;
3098
3099		if (edid->blocks) {
3100			if (edid->blocks > 256) {
3101				ret = -EINVAL;
3102				break;
3103			}
3104			*user_ptr = (void __user *)edid->edid;
3105			*kernel_ptr = (void **)&edid->edid;
3106			*array_size = edid->blocks * 128;
3107			ret = 1;
3108		}
3109		break;
3110	}
3111
3112	case VIDIOC_S_EXT_CTRLS:
3113	case VIDIOC_G_EXT_CTRLS:
3114	case VIDIOC_TRY_EXT_CTRLS: {
3115		struct v4l2_ext_controls *ctrls = parg;
3116
3117		if (ctrls->count != 0) {
3118			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3119				ret = -EINVAL;
3120				break;
3121			}
3122			*user_ptr = (void __user *)ctrls->controls;
3123			*kernel_ptr = (void **)&ctrls->controls;
3124			*array_size = sizeof(struct v4l2_ext_control)
3125				    * ctrls->count;
3126			ret = 1;
3127		}
3128		break;
3129	}
3130	case VIDIOC_G_FMT:
3131	case VIDIOC_S_FMT:
3132	case VIDIOC_TRY_FMT: {
3133		struct v4l2_format *fmt = parg;
3134
3135		if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3136		    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3137			break;
3138		if (fmt->fmt.win.clipcount > 2048)
3139			return -EINVAL;
3140		if (!fmt->fmt.win.clipcount)
3141			break;
3142
3143		*user_ptr = (void __user *)fmt->fmt.win.clips;
3144		*kernel_ptr = (void **)&fmt->fmt.win.clips;
3145		*array_size = sizeof(struct v4l2_clip)
3146				* fmt->fmt.win.clipcount;
3147
3148		ret = 1;
3149		break;
3150	}
3151	}
3152
3153	return ret;
3154}
3155
3156static unsigned int video_translate_cmd(unsigned int cmd)
3157{
3158#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3159	switch (cmd) {
3160	case VIDIOC_DQEVENT_TIME32:
3161		return VIDIOC_DQEVENT;
3162	case VIDIOC_QUERYBUF_TIME32:
3163		return VIDIOC_QUERYBUF;
3164	case VIDIOC_QBUF_TIME32:
3165		return VIDIOC_QBUF;
3166	case VIDIOC_DQBUF_TIME32:
3167		return VIDIOC_DQBUF;
3168	case VIDIOC_PREPARE_BUF_TIME32:
3169		return VIDIOC_PREPARE_BUF;
3170	}
3171#endif
3172	if (in_compat_syscall())
3173		return v4l2_compat_translate_cmd(cmd);
3174
3175	return cmd;
3176}
3177
3178static int video_get_user(void __user *arg, void *parg,
3179			  unsigned int real_cmd, unsigned int cmd,
3180			  bool *always_copy)
3181{
3182	unsigned int n = _IOC_SIZE(real_cmd);
3183	int err = 0;
3184
3185	if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3186		/* read-only ioctl */
3187		memset(parg, 0, n);
3188		return 0;
3189	}
3190
3191	/*
3192	 * In some cases, only a few fields are used as input,
3193	 * i.e. when the app sets "index" and then the driver
3194	 * fills in the rest of the structure for the thing
3195	 * with that index.  We only need to copy up the first
3196	 * non-input field.
3197	 */
3198	if (v4l2_is_known_ioctl(real_cmd)) {
3199		u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3200
3201		if (flags & INFO_FL_CLEAR_MASK)
3202			n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3203		*always_copy = flags & INFO_FL_ALWAYS_COPY;
3204	}
3205
3206	if (cmd == real_cmd) {
3207		if (copy_from_user(parg, (void __user *)arg, n))
3208			err = -EFAULT;
3209	} else if (in_compat_syscall()) {
3210		memset(parg, 0, n);
3211		err = v4l2_compat_get_user(arg, parg, cmd);
3212	} else {
3213		memset(parg, 0, n);
3214#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3215		switch (cmd) {
3216		case VIDIOC_QUERYBUF_TIME32:
3217		case VIDIOC_QBUF_TIME32:
3218		case VIDIOC_DQBUF_TIME32:
3219		case VIDIOC_PREPARE_BUF_TIME32: {
3220			struct v4l2_buffer_time32 vb32;
3221			struct v4l2_buffer *vb = parg;
3222
3223			if (copy_from_user(&vb32, arg, sizeof(vb32)))
3224				return -EFAULT;
3225
3226			*vb = (struct v4l2_buffer) {
3227				.index		= vb32.index,
3228				.type		= vb32.type,
3229				.bytesused	= vb32.bytesused,
3230				.flags		= vb32.flags,
3231				.field		= vb32.field,
3232				.timestamp.tv_sec	= vb32.timestamp.tv_sec,
3233				.timestamp.tv_usec	= vb32.timestamp.tv_usec,
3234				.timecode	= vb32.timecode,
3235				.sequence	= vb32.sequence,
3236				.memory		= vb32.memory,
3237				.m.userptr	= vb32.m.userptr,
3238				.length		= vb32.length,
3239				.request_fd	= vb32.request_fd,
3240			};
3241			break;
3242		}
3243		}
3244#endif
3245	}
3246
3247	/* zero out anything we don't copy from userspace */
3248	if (!err && n < _IOC_SIZE(real_cmd))
3249		memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3250	return err;
3251}
3252
3253static int video_put_user(void __user *arg, void *parg,
3254			  unsigned int real_cmd, unsigned int cmd)
3255{
3256	if (!(_IOC_DIR(cmd) & _IOC_READ))
3257		return 0;
3258
3259	if (cmd == real_cmd) {
3260		/*  Copy results into user buffer  */
3261		if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3262			return -EFAULT;
3263		return 0;
3264	}
3265
3266	if (in_compat_syscall())
3267		return v4l2_compat_put_user(arg, parg, cmd);
3268
3269#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3270	switch (cmd) {
3271	case VIDIOC_DQEVENT_TIME32: {
3272		struct v4l2_event *ev = parg;
3273		struct v4l2_event_time32 ev32;
3274
3275		memset(&ev32, 0, sizeof(ev32));
3276
3277		ev32.type	= ev->type;
3278		ev32.pending	= ev->pending;
3279		ev32.sequence	= ev->sequence;
3280		ev32.timestamp.tv_sec	= ev->timestamp.tv_sec;
3281		ev32.timestamp.tv_nsec	= ev->timestamp.tv_nsec;
3282		ev32.id		= ev->id;
3283
3284		memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3285		memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3286
3287		if (copy_to_user(arg, &ev32, sizeof(ev32)))
3288			return -EFAULT;
3289		break;
3290	}
3291	case VIDIOC_QUERYBUF_TIME32:
3292	case VIDIOC_QBUF_TIME32:
3293	case VIDIOC_DQBUF_TIME32:
3294	case VIDIOC_PREPARE_BUF_TIME32: {
3295		struct v4l2_buffer *vb = parg;
3296		struct v4l2_buffer_time32 vb32;
3297
3298		memset(&vb32, 0, sizeof(vb32));
3299
3300		vb32.index	= vb->index;
3301		vb32.type	= vb->type;
3302		vb32.bytesused	= vb->bytesused;
3303		vb32.flags	= vb->flags;
3304		vb32.field	= vb->field;
3305		vb32.timestamp.tv_sec	= vb->timestamp.tv_sec;
3306		vb32.timestamp.tv_usec	= vb->timestamp.tv_usec;
3307		vb32.timecode	= vb->timecode;
3308		vb32.sequence	= vb->sequence;
3309		vb32.memory	= vb->memory;
3310		vb32.m.userptr	= vb->m.userptr;
3311		vb32.length	= vb->length;
3312		vb32.request_fd	= vb->request_fd;
3313
3314		if (copy_to_user(arg, &vb32, sizeof(vb32)))
3315			return -EFAULT;
3316		break;
3317	}
3318	}
3319#endif
3320
3321	return 0;
3322}
3323
3324long
3325video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3326	       v4l2_kioctl func)
3327{
3328	char	sbuf[128];
3329	void    *mbuf = NULL, *array_buf = NULL;
3330	void	*parg = (void *)arg;
3331	long	err  = -EINVAL;
3332	bool	has_array_args;
3333	bool	always_copy = false;
3334	size_t  array_size = 0;
3335	void __user *user_ptr = NULL;
3336	void	**kernel_ptr = NULL;
3337	unsigned int cmd = video_translate_cmd(orig_cmd);
3338	const size_t ioc_size = _IOC_SIZE(cmd);
3339
3340	/*  Copy arguments into temp kernel buffer  */
3341	if (_IOC_DIR(cmd) != _IOC_NONE) {
3342		if (ioc_size <= sizeof(sbuf)) {
3343			parg = sbuf;
3344		} else {
3345			/* too big to allocate from stack */
3346			mbuf = kmalloc(ioc_size, GFP_KERNEL);
3347			if (NULL == mbuf)
3348				return -ENOMEM;
3349			parg = mbuf;
3350		}
3351
3352		err = video_get_user((void __user *)arg, parg, cmd,
3353				     orig_cmd, &always_copy);
3354		if (err)
3355			goto out;
3356	}
3357
3358	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3359	if (err < 0)
3360		goto out;
3361	has_array_args = err;
3362
3363	if (has_array_args) {
3364		array_buf = kvmalloc(array_size, GFP_KERNEL);
3365		err = -ENOMEM;
3366		if (array_buf == NULL)
3367			goto out;
3368		if (in_compat_syscall())
3369			err = v4l2_compat_get_array_args(file, array_buf,
3370							 user_ptr, array_size,
3371							 orig_cmd, parg);
3372		else
3373			err = copy_from_user(array_buf, user_ptr, array_size) ?
3374								-EFAULT : 0;
3375		if (err)
3376			goto out;
3377		*kernel_ptr = array_buf;
3378	}
3379
3380	/* Handles IOCTL */
3381	err = func(file, cmd, parg);
3382	if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3383		err = -ENOTTY;
3384		goto out;
3385	}
3386
3387	if (err == 0) {
3388		if (cmd == VIDIOC_DQBUF)
3389			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3390		else if (cmd == VIDIOC_QBUF)
3391			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3392	}
3393
3394	/*
3395	 * Some ioctls can return an error, but still have valid
3396	 * results that must be returned.
3397	 */
3398	if (err < 0 && !always_copy)
3399		goto out;
3400
3401	if (has_array_args) {
3402		*kernel_ptr = (void __force *)user_ptr;
3403		if (in_compat_syscall()) {
3404			int put_err;
3405
3406			put_err = v4l2_compat_put_array_args(file, user_ptr,
3407							     array_buf,
3408							     array_size,
3409							     orig_cmd, parg);
3410			if (put_err)
3411				err = put_err;
3412		} else if (copy_to_user(user_ptr, array_buf, array_size)) {
3413			err = -EFAULT;
3414		}
3415	}
3416
3417	if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3418		err = -EFAULT;
3419out:
3420	kvfree(array_buf);
3421	kfree(mbuf);
3422	return err;
3423}
3424
3425long video_ioctl2(struct file *file,
3426	       unsigned int cmd, unsigned long arg)
3427{
3428	return video_usercopy(file, cmd, arg, __video_do_ioctl);
3429}
3430EXPORT_SYMBOL(video_ioctl2);