1/*
   2 * Video capture interface for Linux version 2
   3 *
   4 * A generic framework to process V4L2 ioctl commands.
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 *
  11 * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12 *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/slab.h>
  17#include <linux/types.h>
  18#include <linux/kernel.h>
  19#include <linux/version.h>
  20
  21#include <linux/videodev2.h>
  22
  23#include <media/v4l2-common.h>
  24#include <media/v4l2-ioctl.h>
  25#include <media/v4l2-ctrls.h>
  26#include <media/v4l2-fh.h>
  27#include <media/v4l2-event.h>
  28#include <media/v4l2-device.h>
  29#include <media/videobuf2-v4l2.h>
  30#include <media/v4l2-mc.h>
  31
  32#include <trace/events/v4l2.h>
  33
  34/* Zero out the end of the struct pointed to by p.  Everything after, but
  35 * not including, the specified field is cleared. */
  36#define CLEAR_AFTER_FIELD(p, field) \
  37	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  38	0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  39
  40#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
  41
  42struct std_descr {
  43	v4l2_std_id std;
  44	const char *descr;
  45};
  46
  47static const struct std_descr standards[] = {
  48	{ V4L2_STD_NTSC, 	"NTSC"      },
  49	{ V4L2_STD_NTSC_M, 	"NTSC-M"    },
  50	{ V4L2_STD_NTSC_M_JP, 	"NTSC-M-JP" },
  51	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
  52	{ V4L2_STD_NTSC_443, 	"NTSC-443"  },
  53	{ V4L2_STD_PAL, 	"PAL"       },
  54	{ V4L2_STD_PAL_BG, 	"PAL-BG"    },
  55	{ V4L2_STD_PAL_B, 	"PAL-B"     },
  56	{ V4L2_STD_PAL_B1, 	"PAL-B1"    },
  57	{ V4L2_STD_PAL_G, 	"PAL-G"     },
  58	{ V4L2_STD_PAL_H, 	"PAL-H"     },
  59	{ V4L2_STD_PAL_I, 	"PAL-I"     },
  60	{ V4L2_STD_PAL_DK, 	"PAL-DK"    },
  61	{ V4L2_STD_PAL_D, 	"PAL-D"     },
  62	{ V4L2_STD_PAL_D1, 	"PAL-D1"    },
  63	{ V4L2_STD_PAL_K, 	"PAL-K"     },
  64	{ V4L2_STD_PAL_M, 	"PAL-M"     },
  65	{ V4L2_STD_PAL_N, 	"PAL-N"     },
  66	{ V4L2_STD_PAL_Nc, 	"PAL-Nc"    },
  67	{ V4L2_STD_PAL_60, 	"PAL-60"    },
  68	{ V4L2_STD_SECAM, 	"SECAM"     },
  69	{ V4L2_STD_SECAM_B, 	"SECAM-B"   },
  70	{ V4L2_STD_SECAM_G, 	"SECAM-G"   },
  71	{ V4L2_STD_SECAM_H, 	"SECAM-H"   },
  72	{ V4L2_STD_SECAM_DK, 	"SECAM-DK"  },
  73	{ V4L2_STD_SECAM_D, 	"SECAM-D"   },
  74	{ V4L2_STD_SECAM_K, 	"SECAM-K"   },
  75	{ V4L2_STD_SECAM_K1, 	"SECAM-K1"  },
  76	{ V4L2_STD_SECAM_L, 	"SECAM-L"   },
  77	{ V4L2_STD_SECAM_LC, 	"SECAM-Lc"  },
  78	{ 0, 			"Unknown"   }
  79};
  80
  81/* video4linux standard ID conversion to standard name
  82 */
  83const char *v4l2_norm_to_name(v4l2_std_id id)
  84{
  85	u32 myid = id;
  86	int i;
  87
  88	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
  89	   64 bit comparations. So, on that architecture, with some gcc
  90	   variants, compilation fails. Currently, the max value is 30bit wide.
  91	 */
  92	BUG_ON(myid != id);
  93
  94	for (i = 0; standards[i].std; i++)
  95		if (myid == standards[i].std)
  96			break;
  97	return standards[i].descr;
  98}
  99EXPORT_SYMBOL(v4l2_norm_to_name);
 100
 101/* Returns frame period for the given standard */
 102void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 103{
 104	if (id & V4L2_STD_525_60) {
 105		frameperiod->numerator = 1001;
 106		frameperiod->denominator = 30000;
 107	} else {
 108		frameperiod->numerator = 1;
 109		frameperiod->denominator = 25;
 110	}
 111}
 112EXPORT_SYMBOL(v4l2_video_std_frame_period);
 113
 114/* Fill in the fields of a v4l2_standard structure according to the
 115   'id' and 'transmission' parameters.  Returns negative on error.  */
 116int v4l2_video_std_construct(struct v4l2_standard *vs,
 117			     int id, const char *name)
 118{
 119	vs->id = id;
 120	v4l2_video_std_frame_period(id, &vs->frameperiod);
 121	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 122	strlcpy(vs->name, name, sizeof(vs->name));
 123	return 0;
 124}
 125EXPORT_SYMBOL(v4l2_video_std_construct);
 126
 127/* ----------------------------------------------------------------- */
 128/* some arrays for pretty-printing debug messages of enum types      */
 129
 130const char *v4l2_field_names[] = {
 131	[V4L2_FIELD_ANY]        = "any",
 132	[V4L2_FIELD_NONE]       = "none",
 133	[V4L2_FIELD_TOP]        = "top",
 134	[V4L2_FIELD_BOTTOM]     = "bottom",
 135	[V4L2_FIELD_INTERLACED] = "interlaced",
 136	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
 137	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
 138	[V4L2_FIELD_ALTERNATE]  = "alternate",
 139	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 140	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 141};
 142EXPORT_SYMBOL(v4l2_field_names);
 143
 144const char *v4l2_type_names[] = {
 145	[0]				   = "0",
 146	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 147	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 148	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 149	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 150	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 151	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 152	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 153	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 154	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 155	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 156	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
 157	[V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
 158};
 159EXPORT_SYMBOL(v4l2_type_names);
 160
 161static const char *v4l2_memory_names[] = {
 162	[V4L2_MEMORY_MMAP]    = "mmap",
 163	[V4L2_MEMORY_USERPTR] = "userptr",
 164	[V4L2_MEMORY_OVERLAY] = "overlay",
 165	[V4L2_MEMORY_DMABUF] = "dmabuf",
 166};
 167
 168#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
 169
 170/* ------------------------------------------------------------------ */
 171/* debug help functions                                               */
 172
 173static void v4l_print_querycap(const void *arg, bool write_only)
 174{
 175	const struct v4l2_capability *p = arg;
 176
 177	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
 178		"capabilities=0x%08x, device_caps=0x%08x\n",
 179		(int)sizeof(p->driver), p->driver,
 180		(int)sizeof(p->card), p->card,
 181		(int)sizeof(p->bus_info), p->bus_info,
 182		p->version, p->capabilities, p->device_caps);
 183}
 184
 185static void v4l_print_enuminput(const void *arg, bool write_only)
 186{
 187	const struct v4l2_input *p = arg;
 188
 189	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
 190		"std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
 191		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 192		p->tuner, (unsigned long long)p->std, p->status,
 193		p->capabilities);
 194}
 195
 196static void v4l_print_enumoutput(const void *arg, bool write_only)
 197{
 198	const struct v4l2_output *p = arg;
 199
 200	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
 201		"modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
 202		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
 203		p->modulator, (unsigned long long)p->std, p->capabilities);
 204}
 205
 206static void v4l_print_audio(const void *arg, bool write_only)
 207{
 208	const struct v4l2_audio *p = arg;
 209
 210	if (write_only)
 211		pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
 212	else
 213		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 214			p->index, (int)sizeof(p->name), p->name,
 215			p->capability, p->mode);
 216}
 217
 218static void v4l_print_audioout(const void *arg, bool write_only)
 219{
 220	const struct v4l2_audioout *p = arg;
 221
 222	if (write_only)
 223		pr_cont("index=%u\n", p->index);
 224	else
 225		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
 226			p->index, (int)sizeof(p->name), p->name,
 227			p->capability, p->mode);
 228}
 229
 230static void v4l_print_fmtdesc(const void *arg, bool write_only)
 231{
 232	const struct v4l2_fmtdesc *p = arg;
 233
 234	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
 235		p->index, prt_names(p->type, v4l2_type_names),
 236		p->flags, (p->pixelformat & 0xff),
 237		(p->pixelformat >>  8) & 0xff,
 238		(p->pixelformat >> 16) & 0xff,
 239		(p->pixelformat >> 24) & 0xff,
 240		(int)sizeof(p->description), p->description);
 241}
 242
 243static void v4l_print_format(const void *arg, bool write_only)
 244{
 245	const struct v4l2_format *p = arg;
 246	const struct v4l2_pix_format *pix;
 247	const struct v4l2_pix_format_mplane *mp;
 248	const struct v4l2_vbi_format *vbi;
 249	const struct v4l2_sliced_vbi_format *sliced;
 250	const struct v4l2_window *win;
 251	const struct v4l2_sdr_format *sdr;
 252	unsigned i;
 253
 254	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 255	switch (p->type) {
 256	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 257	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 258		pix = &p->fmt.pix;
 259		pr_cont(", width=%u, height=%u, "
 260			"pixelformat=%c%c%c%c, field=%s, "
 261			"bytesperline=%u, sizeimage=%u, colorspace=%d, "
 262			"flags=0x%x, ycbcr_enc=%u, quantization=%u, "
 263			"xfer_func=%u\n",
 264			pix->width, pix->height,
 265			(pix->pixelformat & 0xff),
 266			(pix->pixelformat >>  8) & 0xff,
 267			(pix->pixelformat >> 16) & 0xff,
 268			(pix->pixelformat >> 24) & 0xff,
 269			prt_names(pix->field, v4l2_field_names),
 270			pix->bytesperline, pix->sizeimage,
 271			pix->colorspace, pix->flags, pix->ycbcr_enc,
 272			pix->quantization, pix->xfer_func);
 273		break;
 274	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 275	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 276		mp = &p->fmt.pix_mp;
 277		pr_cont(", width=%u, height=%u, "
 278			"format=%c%c%c%c, field=%s, "
 279			"colorspace=%d, num_planes=%u, flags=0x%x, "
 280			"ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
 281			mp->width, mp->height,
 282			(mp->pixelformat & 0xff),
 283			(mp->pixelformat >>  8) & 0xff,
 284			(mp->pixelformat >> 16) & 0xff,
 285			(mp->pixelformat >> 24) & 0xff,
 286			prt_names(mp->field, v4l2_field_names),
 287			mp->colorspace, mp->num_planes, mp->flags,
 288			mp->ycbcr_enc, mp->quantization, mp->xfer_func);
 289		for (i = 0; i < mp->num_planes; i++)
 290			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
 291					mp->plane_fmt[i].bytesperline,
 292					mp->plane_fmt[i].sizeimage);
 293		break;
 294	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 295	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 296		win = &p->fmt.win;
 297		/* Note: we can't print the clip list here since the clips
 298		 * pointer is a userspace pointer, not a kernelspace
 299		 * pointer. */
 300		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",
 301			win->w.width, win->w.height, win->w.left, win->w.top,
 302			prt_names(win->field, v4l2_field_names),
 303			win->chromakey, win->clipcount, win->clips,
 304			win->bitmap, win->global_alpha);
 305		break;
 306	case V4L2_BUF_TYPE_VBI_CAPTURE:
 307	case V4L2_BUF_TYPE_VBI_OUTPUT:
 308		vbi = &p->fmt.vbi;
 309		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
 310			"sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
 311			vbi->sampling_rate, vbi->offset,
 312			vbi->samples_per_line,
 313			(vbi->sample_format & 0xff),
 314			(vbi->sample_format >>  8) & 0xff,
 315			(vbi->sample_format >> 16) & 0xff,
 316			(vbi->sample_format >> 24) & 0xff,
 317			vbi->start[0], vbi->start[1],
 318			vbi->count[0], vbi->count[1]);
 319		break;
 320	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 321	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 322		sliced = &p->fmt.sliced;
 323		pr_cont(", service_set=0x%08x, io_size=%d\n",
 324				sliced->service_set, sliced->io_size);
 325		for (i = 0; i < 24; i++)
 326			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 327				sliced->service_lines[0][i],
 328				sliced->service_lines[1][i]);
 329		break;
 330	case V4L2_BUF_TYPE_SDR_CAPTURE:
 331	case V4L2_BUF_TYPE_SDR_OUTPUT:
 332		sdr = &p->fmt.sdr;
 333		pr_cont(", pixelformat=%c%c%c%c\n",
 334			(sdr->pixelformat >>  0) & 0xff,
 335			(sdr->pixelformat >>  8) & 0xff,
 336			(sdr->pixelformat >> 16) & 0xff,
 337			(sdr->pixelformat >> 24) & 0xff);
 338		break;
 339	}
 340}
 341
 342static void v4l_print_framebuffer(const void *arg, bool write_only)
 343{
 344	const struct v4l2_framebuffer *p = arg;
 345
 346	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
 347		"height=%u, pixelformat=%c%c%c%c, "
 348		"bytesperline=%u, sizeimage=%u, colorspace=%d\n",
 349			p->capability, p->flags, p->base,
 350			p->fmt.width, p->fmt.height,
 351			(p->fmt.pixelformat & 0xff),
 352			(p->fmt.pixelformat >>  8) & 0xff,
 353			(p->fmt.pixelformat >> 16) & 0xff,
 354			(p->fmt.pixelformat >> 24) & 0xff,
 355			p->fmt.bytesperline, p->fmt.sizeimage,
 356			p->fmt.colorspace);
 357}
 358
 359static void v4l_print_buftype(const void *arg, bool write_only)
 360{
 361	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
 362}
 363
 364static void v4l_print_modulator(const void *arg, bool write_only)
 365{
 366	const struct v4l2_modulator *p = arg;
 367
 368	if (write_only)
 369		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
 370	else
 371		pr_cont("index=%u, name=%.*s, capability=0x%x, "
 372			"rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
 373			p->index, (int)sizeof(p->name), p->name, p->capability,
 374			p->rangelow, p->rangehigh, p->txsubchans);
 375}
 376
 377static void v4l_print_tuner(const void *arg, bool write_only)
 378{
 379	const struct v4l2_tuner *p = arg;
 380
 381	if (write_only)
 382		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
 383	else
 384		pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
 385			"rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
 386			"rxsubchans=0x%x, audmode=%u\n",
 387			p->index, (int)sizeof(p->name), p->name, p->type,
 388			p->capability, p->rangelow,
 389			p->rangehigh, p->signal, p->afc,
 390			p->rxsubchans, p->audmode);
 391}
 392
 393static void v4l_print_frequency(const void *arg, bool write_only)
 394{
 395	const struct v4l2_frequency *p = arg;
 396
 397	pr_cont("tuner=%u, type=%u, frequency=%u\n",
 398				p->tuner, p->type, p->frequency);
 399}
 400
 401static void v4l_print_standard(const void *arg, bool write_only)
 402{
 403	const struct v4l2_standard *p = arg;
 404
 405	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
 406		"framelines=%u\n", p->index,
 407		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
 408		p->frameperiod.numerator,
 409		p->frameperiod.denominator,
 410		p->framelines);
 411}
 412
 413static void v4l_print_std(const void *arg, bool write_only)
 414{
 415	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
 416}
 417
 418static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
 419{
 420	const struct v4l2_hw_freq_seek *p = arg;
 421
 422	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
 423		"rangelow=%u, rangehigh=%u\n",
 424		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
 425		p->rangelow, p->rangehigh);
 426}
 427
 428static void v4l_print_requestbuffers(const void *arg, bool write_only)
 429{
 430	const struct v4l2_requestbuffers *p = arg;
 431
 432	pr_cont("count=%d, type=%s, memory=%s\n",
 433		p->count,
 434		prt_names(p->type, v4l2_type_names),
 435		prt_names(p->memory, v4l2_memory_names));
 436}
 437
 438static void v4l_print_buffer(const void *arg, bool write_only)
 439{
 440	const struct v4l2_buffer *p = arg;
 441	const struct v4l2_timecode *tc = &p->timecode;
 442	const struct v4l2_plane *plane;
 443	int i;
 444
 445	pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 446		"flags=0x%08x, field=%s, sequence=%d, memory=%s",
 447			p->timestamp.tv_sec / 3600,
 448			(int)(p->timestamp.tv_sec / 60) % 60,
 449			(int)(p->timestamp.tv_sec % 60),
 450			(long)p->timestamp.tv_usec,
 451			p->index,
 452			prt_names(p->type, v4l2_type_names),
 453			p->flags, prt_names(p->field, v4l2_field_names),
 454			p->sequence, prt_names(p->memory, v4l2_memory_names));
 455
 456	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 457		pr_cont("\n");
 458		for (i = 0; i < p->length; ++i) {
 459			plane = &p->m.planes[i];
 460			printk(KERN_DEBUG
 461				"plane %d: bytesused=%d, data_offset=0x%08x, "
 462				"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, "
 472		"flags=0x%08x, frames=%d, userbits=0x%08x\n",
 473			tc->hours, tc->minutes, tc->seconds,
 474			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 475}
 476
 477static void v4l_print_exportbuffer(const void *arg, bool write_only)
 478{
 479	const struct v4l2_exportbuffer *p = arg;
 480
 481	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
 482		p->fd, prt_names(p->type, v4l2_type_names),
 483		p->index, p->plane, p->flags);
 484}
 485
 486static void v4l_print_create_buffers(const void *arg, bool write_only)
 487{
 488	const struct v4l2_create_buffers *p = arg;
 489
 490	pr_cont("index=%d, count=%d, memory=%s, ",
 491			p->index, p->count,
 492			prt_names(p->memory, v4l2_memory_names));
 493	v4l_print_format(&p->format, write_only);
 494}
 495
 496static void v4l_print_streamparm(const void *arg, bool write_only)
 497{
 498	const struct v4l2_streamparm *p = arg;
 499
 500	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
 501
 502	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
 503	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 504		const struct v4l2_captureparm *c = &p->parm.capture;
 505
 506		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
 507			"extendedmode=%d, readbuffers=%d\n",
 508			c->capability, c->capturemode,
 509			c->timeperframe.numerator, c->timeperframe.denominator,
 510			c->extendedmode, c->readbuffers);
 511	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 512		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 513		const struct v4l2_outputparm *c = &p->parm.output;
 514
 515		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
 516			"extendedmode=%d, writebuffers=%d\n",
 517			c->capability, c->outputmode,
 518			c->timeperframe.numerator, c->timeperframe.denominator,
 519			c->extendedmode, c->writebuffers);
 520	} else {
 521		pr_cont("\n");
 522	}
 523}
 524
 525static void v4l_print_queryctrl(const void *arg, bool write_only)
 526{
 527	const struct v4l2_queryctrl *p = arg;
 528
 529	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
 530		"step=%d, default=%d, flags=0x%08x\n",
 531			p->id, p->type, (int)sizeof(p->name), p->name,
 532			p->minimum, p->maximum,
 533			p->step, p->default_value, p->flags);
 534}
 535
 536static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
 537{
 538	const struct v4l2_query_ext_ctrl *p = arg;
 539
 540	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
 541		"step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
 542		"nr_of_dims=%u, dims=%u,%u,%u,%u\n",
 543			p->id, p->type, (int)sizeof(p->name), p->name,
 544			p->minimum, p->maximum,
 545			p->step, p->default_value, p->flags,
 546			p->elem_size, p->elems, p->nr_of_dims,
 547			p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
 548}
 549
 550static void v4l_print_querymenu(const void *arg, bool write_only)
 551{
 552	const struct v4l2_querymenu *p = arg;
 553
 554	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
 555}
 556
 557static void v4l_print_control(const void *arg, bool write_only)
 558{
 559	const struct v4l2_control *p = arg;
 560
 561	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
 562}
 563
 564static void v4l_print_ext_controls(const void *arg, bool write_only)
 565{
 566	const struct v4l2_ext_controls *p = arg;
 567	int i;
 568
 569	pr_cont("which=0x%x, count=%d, error_idx=%d",
 570			p->which, p->count, p->error_idx);
 571	for (i = 0; i < p->count; i++) {
 572		if (!p->controls[i].size)
 573			pr_cont(", id/val=0x%x/0x%x",
 574				p->controls[i].id, p->controls[i].value);
 575		else
 576			pr_cont(", id/size=0x%x/%u",
 577				p->controls[i].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, "
 587		"defrect wxh=%dx%d, x,y=%d,%d, "
 588		"pixelaspect %d/%d\n",
 589		prt_names(p->type, v4l2_type_names),
 590		p->bounds.width, p->bounds.height,
 591		p->bounds.left, p->bounds.top,
 592		p->defrect.width, p->defrect.height,
 593		p->defrect.left, p->defrect.top,
 594		p->pixelaspect.numerator, p->pixelaspect.denominator);
 595}
 596
 597static void v4l_print_crop(const void *arg, bool write_only)
 598{
 599	const struct v4l2_crop *p = arg;
 600
 601	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
 602		prt_names(p->type, v4l2_type_names),
 603		p->c.width, p->c.height,
 604		p->c.left, p->c.top);
 605}
 606
 607static void v4l_print_selection(const void *arg, bool write_only)
 608{
 609	const struct v4l2_selection *p = arg;
 610
 611	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
 612		prt_names(p->type, v4l2_type_names),
 613		p->target, p->flags,
 614		p->r.width, p->r.height, p->r.left, p->r.top);
 615}
 616
 617static void v4l_print_jpegcompression(const void *arg, bool write_only)
 618{
 619	const struct v4l2_jpegcompression *p = arg;
 620
 621	pr_cont("quality=%d, APPn=%d, APP_len=%d, "
 622		"COM_len=%d, jpeg_markers=0x%x\n",
 623		p->quality, p->APPn, p->APP_len,
 624		p->COM_len, p->jpeg_markers);
 625}
 626
 627static void v4l_print_enc_idx(const void *arg, bool write_only)
 628{
 629	const struct v4l2_enc_idx *p = arg;
 630
 631	pr_cont("entries=%d, entries_cap=%d\n",
 632			p->entries, p->entries_cap);
 633}
 634
 635static void v4l_print_encoder_cmd(const void *arg, bool write_only)
 636{
 637	const struct v4l2_encoder_cmd *p = arg;
 638
 639	pr_cont("cmd=%d, flags=0x%x\n",
 640			p->cmd, p->flags);
 641}
 642
 643static void v4l_print_decoder_cmd(const void *arg, bool write_only)
 644{
 645	const struct v4l2_decoder_cmd *p = arg;
 646
 647	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
 648
 649	if (p->cmd == V4L2_DEC_CMD_START)
 650		pr_info("speed=%d, format=%u\n",
 651				p->start.speed, p->start.format);
 652	else if (p->cmd == V4L2_DEC_CMD_STOP)
 653		pr_info("pts=%llu\n", p->stop.pts);
 654}
 655
 656static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
 657{
 658	const struct v4l2_dbg_chip_info *p = arg;
 659
 660	pr_cont("type=%u, ", p->match.type);
 661	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 662		pr_cont("name=%.*s, ",
 663				(int)sizeof(p->match.name), p->match.name);
 664	else
 665		pr_cont("addr=%u, ", p->match.addr);
 666	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
 667}
 668
 669static void v4l_print_dbg_register(const void *arg, bool write_only)
 670{
 671	const struct v4l2_dbg_register *p = arg;
 672
 673	pr_cont("type=%u, ", p->match.type);
 674	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
 675		pr_cont("name=%.*s, ",
 676				(int)sizeof(p->match.name), p->match.name);
 677	else
 678		pr_cont("addr=%u, ", p->match.addr);
 679	pr_cont("reg=0x%llx, val=0x%llx\n",
 680			p->reg, p->val);
 681}
 682
 683static void v4l_print_dv_timings(const void *arg, bool write_only)
 684{
 685	const struct v4l2_dv_timings *p = arg;
 686
 687	switch (p->type) {
 688	case V4L2_DV_BT_656_1120:
 689		pr_cont("type=bt-656/1120, interlaced=%u, "
 690			"pixelclock=%llu, "
 691			"width=%u, height=%u, polarities=0x%x, "
 692			"hfrontporch=%u, hsync=%u, "
 693			"hbackporch=%u, vfrontporch=%u, "
 694			"vsync=%u, vbackporch=%u, "
 695			"il_vfrontporch=%u, il_vsync=%u, "
 696			"il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
 697				p->bt.interlaced, p->bt.pixelclock,
 698				p->bt.width, p->bt.height,
 699				p->bt.polarities, p->bt.hfrontporch,
 700				p->bt.hsync, p->bt.hbackporch,
 701				p->bt.vfrontporch, p->bt.vsync,
 702				p->bt.vbackporch, p->bt.il_vfrontporch,
 703				p->bt.il_vsync, p->bt.il_vbackporch,
 704				p->bt.standards, p->bt.flags);
 705		break;
 706	default:
 707		pr_cont("type=%d\n", p->type);
 708		break;
 709	}
 710}
 711
 712static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
 713{
 714	const struct v4l2_enum_dv_timings *p = arg;
 715
 716	pr_cont("index=%u, ", p->index);
 717	v4l_print_dv_timings(&p->timings, write_only);
 718}
 719
 720static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
 721{
 722	const struct v4l2_dv_timings_cap *p = arg;
 723
 724	switch (p->type) {
 725	case V4L2_DV_BT_656_1120:
 726		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
 727			"pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
 728			p->bt.min_width, p->bt.max_width,
 729			p->bt.min_height, p->bt.max_height,
 730			p->bt.min_pixelclock, p->bt.max_pixelclock,
 731			p->bt.standards, p->bt.capabilities);
 732		break;
 733	default:
 734		pr_cont("type=%u\n", p->type);
 735		break;
 736	}
 737}
 738
 739static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 740{
 741	const struct v4l2_frmsizeenum *p = arg;
 742
 743	pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
 744			p->index,
 745			(p->pixel_format & 0xff),
 746			(p->pixel_format >>  8) & 0xff,
 747			(p->pixel_format >> 16) & 0xff,
 748			(p->pixel_format >> 24) & 0xff,
 749			p->type);
 750	switch (p->type) {
 751	case V4L2_FRMSIZE_TYPE_DISCRETE:
 752		pr_cont(", wxh=%ux%u\n",
 753			p->discrete.width, p->discrete.height);
 754		break;
 755	case V4L2_FRMSIZE_TYPE_STEPWISE:
 756		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
 757				p->stepwise.min_width,  p->stepwise.min_height,
 758				p->stepwise.step_width, p->stepwise.step_height,
 759				p->stepwise.max_width,  p->stepwise.max_height);
 760		break;
 761	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
 762		/* fall through */
 763	default:
 764		pr_cont("\n");
 765		break;
 766	}
 767}
 768
 769static void v4l_print_frmivalenum(const void *arg, bool write_only)
 770{
 771	const struct v4l2_frmivalenum *p = arg;
 772
 773	pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
 774			p->index,
 775			(p->pixel_format & 0xff),
 776			(p->pixel_format >>  8) & 0xff,
 777			(p->pixel_format >> 16) & 0xff,
 778			(p->pixel_format >> 24) & 0xff,
 779			p->width, p->height, p->type);
 780	switch (p->type) {
 781	case V4L2_FRMIVAL_TYPE_DISCRETE:
 782		pr_cont(", fps=%d/%d\n",
 783				p->discrete.numerator,
 784				p->discrete.denominator);
 785		break;
 786	case V4L2_FRMIVAL_TYPE_STEPWISE:
 787		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
 788				p->stepwise.min.numerator,
 789				p->stepwise.min.denominator,
 790				p->stepwise.max.numerator,
 791				p->stepwise.max.denominator,
 792				p->stepwise.step.numerator,
 793				p->stepwise.step.denominator);
 794		break;
 795	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
 796		/* fall through */
 797	default:
 798		pr_cont("\n");
 799		break;
 800	}
 801}
 802
 803static void v4l_print_event(const void *arg, bool write_only)
 804{
 805	const struct v4l2_event *p = arg;
 806	const struct v4l2_event_ctrl *c;
 807
 808	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
 809		"timestamp=%lu.%9.9lu\n",
 810			p->type, p->pending, p->sequence, p->id,
 811			p->timestamp.tv_sec, p->timestamp.tv_nsec);
 812	switch (p->type) {
 813	case V4L2_EVENT_VSYNC:
 814		printk(KERN_DEBUG "field=%s\n",
 815			prt_names(p->u.vsync.field, v4l2_field_names));
 816		break;
 817	case V4L2_EVENT_CTRL:
 818		c = &p->u.ctrl;
 819		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
 820			c->changes, c->type);
 821		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
 822			pr_cont("value64=%lld, ", c->value64);
 823		else
 824			pr_cont("value=%d, ", c->value);
 825		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
 826			"default_value=%d\n",
 827			c->flags, c->minimum, c->maximum,
 828			c->step, c->default_value);
 829		break;
 830	case V4L2_EVENT_FRAME_SYNC:
 831		pr_cont("frame_sequence=%u\n",
 832			p->u.frame_sync.frame_sequence);
 833		break;
 834	}
 835}
 836
 837static void v4l_print_event_subscription(const void *arg, bool write_only)
 838{
 839	const struct v4l2_event_subscription *p = arg;
 840
 841	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
 842			p->type, p->id, p->flags);
 843}
 844
 845static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
 846{
 847	const struct v4l2_sliced_vbi_cap *p = arg;
 848	int i;
 849
 850	pr_cont("type=%s, service_set=0x%08x\n",
 851			prt_names(p->type, v4l2_type_names), p->service_set);
 852	for (i = 0; i < 24; i++)
 853		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
 854				p->service_lines[0][i],
 855				p->service_lines[1][i]);
 856}
 857
 858static void v4l_print_freq_band(const void *arg, bool write_only)
 859{
 860	const struct v4l2_frequency_band *p = arg;
 861
 862	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
 863		"rangelow=%u, rangehigh=%u, modulation=0x%x\n",
 864			p->tuner, p->type, p->index,
 865			p->capability, p->rangelow,
 866			p->rangehigh, p->modulation);
 867}
 868
 869static void v4l_print_edid(const void *arg, bool write_only)
 870{
 871	const struct v4l2_edid *p = arg;
 872
 873	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
 874		p->pad, p->start_block, p->blocks);
 875}
 876
 877static void v4l_print_u32(const void *arg, bool write_only)
 878{
 879	pr_cont("value=%u\n", *(const u32 *)arg);
 880}
 881
 882static void v4l_print_newline(const void *arg, bool write_only)
 883{
 884	pr_cont("\n");
 885}
 886
 887static void v4l_print_default(const void *arg, bool write_only)
 888{
 889	pr_cont("driver-specific ioctl\n");
 890}
 891
 892static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 893{
 894	__u32 i;
 895
 896	/* zero the reserved fields */
 897	c->reserved[0] = c->reserved[1] = 0;
 898	for (i = 0; i < c->count; i++)
 899		c->controls[i].reserved2[0] = 0;
 900
 901	/* V4L2_CID_PRIVATE_BASE cannot be used as control class
 902	   when using extended controls.
 903	   Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 904	   is it allowed for backwards compatibility.
 905	 */
 906	if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
 907		return 0;
 908	if (!c->which)
 909		return 1;
 910	/* Check that all controls are from the same control class. */
 911	for (i = 0; i < c->count; i++) {
 912		if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
 913			c->error_idx = i;
 914			return 0;
 915		}
 916	}
 917	return 1;
 918}
 919
 920static int check_fmt(struct file *file, enum v4l2_buf_type type)
 921{
 922	struct video_device *vfd = video_devdata(file);
 923	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 924	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
 925	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
 926	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
 927	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
 928	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
 929
 930	if (ops == NULL)
 931		return -EINVAL;
 932
 933	switch (type) {
 934	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 935		if (is_vid && is_rx &&
 936		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
 937			return 0;
 938		break;
 939	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 940		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
 941			return 0;
 942		break;
 943	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 944		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
 945			return 0;
 946		break;
 947	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 948		if (is_vid && is_tx &&
 949		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
 950			return 0;
 951		break;
 952	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 953		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
 954			return 0;
 955		break;
 956	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 957		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
 958			return 0;
 959		break;
 960	case V4L2_BUF_TYPE_VBI_CAPTURE:
 961		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
 962			return 0;
 963		break;
 964	case V4L2_BUF_TYPE_VBI_OUTPUT:
 965		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
 966			return 0;
 967		break;
 968	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 969		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
 970			return 0;
 971		break;
 972	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 973		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
 974			return 0;
 975		break;
 976	case V4L2_BUF_TYPE_SDR_CAPTURE:
 977		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
 978			return 0;
 979		break;
 980	case V4L2_BUF_TYPE_SDR_OUTPUT:
 981		if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
 982			return 0;
 983		break;
 984	default:
 985		break;
 986	}
 987	return -EINVAL;
 988}
 989
 990static void v4l_sanitize_format(struct v4l2_format *fmt)
 991{
 992	unsigned int offset;
 993
 994	/*
 995	 * The v4l2_pix_format structure has been extended with fields that were
 996	 * not previously required to be set to zero by applications. The priv
 997	 * field, when set to a magic value, indicates the the extended fields
 998	 * are valid. Otherwise they will contain undefined values. To simplify
 999	 * the API towards drivers zero the extended fields and set the priv
1000	 * field to the magic value when the extended pixel format structure
1001	 * isn't used by applications.
1002	 */
1003
1004	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1005	    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1006		return;
1007
1008	if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1009		return;
1010
1011	fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1012
1013	offset = offsetof(struct v4l2_pix_format, priv)
1014	       + sizeof(fmt->fmt.pix.priv);
1015	memset(((void *)&fmt->fmt.pix) + offset, 0,
1016	       sizeof(fmt->fmt.pix) - offset);
1017}
1018
1019static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1020				struct file *file, void *fh, void *arg)
1021{
1022	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1023	int ret;
1024
1025	cap->version = LINUX_VERSION_CODE;
1026
1027	ret = ops->vidioc_querycap(file, fh, cap);
1028
1029	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1030	/*
1031	 * Drivers MUST fill in device_caps, so check for this and
1032	 * warn if it was forgotten.
1033	 */
1034	WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1035		!cap->device_caps, "Bad caps for driver %s, %x %x",
1036		cap->driver, cap->capabilities, cap->device_caps);
1037	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1038
1039	return ret;
1040}
1041
1042static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1043				struct file *file, void *fh, void *arg)
1044{
1045	struct video_device *vfd = video_devdata(file);
1046	int ret;
1047
1048	ret = v4l_enable_media_source(vfd);
1049	if (ret)
1050		return ret;
1051	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1052}
1053
1054static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1055				struct file *file, void *fh, void *arg)
1056{
1057	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1058}
1059
1060static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1061				struct file *file, void *fh, void *arg)
1062{
1063	struct video_device *vfd;
1064	u32 *p = arg;
1065
1066	vfd = video_devdata(file);
1067	*p = v4l2_prio_max(vfd->prio);
1068	return 0;
1069}
1070
1071static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1072				struct file *file, void *fh, void *arg)
1073{
1074	struct video_device *vfd;
1075	struct v4l2_fh *vfh;
1076	u32 *p = arg;
1077
1078	vfd = video_devdata(file);
1079	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1080		return -ENOTTY;
1081	vfh = file->private_data;
1082	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1083}
1084
1085static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1086				struct file *file, void *fh, void *arg)
1087{
1088	struct video_device *vfd = video_devdata(file);
1089	struct v4l2_input *p = arg;
1090
1091	/*
1092	 * We set the flags for CAP_DV_TIMINGS &
1093	 * CAP_STD here based on ioctl handler provided by the
1094	 * driver. If the driver doesn't support these
1095	 * for a specific input, it must override these flags.
1096	 */
1097	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1098		p->capabilities |= V4L2_IN_CAP_STD;
1099
1100	return ops->vidioc_enum_input(file, fh, p);
1101}
1102
1103static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1104				struct file *file, void *fh, void *arg)
1105{
1106	struct video_device *vfd = video_devdata(file);
1107	struct v4l2_output *p = arg;
1108
1109	/*
1110	 * We set the flags for CAP_DV_TIMINGS &
1111	 * CAP_STD here based on ioctl handler provided by the
1112	 * driver. If the driver doesn't support these
1113	 * for a specific output, it must override these flags.
1114	 */
1115	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1116		p->capabilities |= V4L2_OUT_CAP_STD;
1117
1118	return ops->vidioc_enum_output(file, fh, p);
1119}
1120
1121static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1122{
1123	const unsigned sz = sizeof(fmt->description);
1124	const char *descr = NULL;
1125	u32 flags = 0;
1126
1127	/*
1128	 * We depart from the normal coding style here since the descriptions
1129	 * should be aligned so it is easy to see which descriptions will be
1130	 * longer than 31 characters (the max length for a description).
1131	 * And frankly, this is easier to read anyway.
1132	 *
1133	 * Note that gcc will use O(log N) comparisons to find the right case.
1134	 */
1135	switch (fmt->pixelformat) {
1136	/* Max description length mask:	descr = "0123456789012345678901234567890" */
1137	case V4L2_PIX_FMT_RGB332:	descr = "8-bit RGB 3-3-2"; break;
1138	case V4L2_PIX_FMT_RGB444:	descr = "16-bit A/XRGB 4-4-4-4"; break;
1139	case V4L2_PIX_FMT_ARGB444:	descr = "16-bit ARGB 4-4-4-4"; break;
1140	case V4L2_PIX_FMT_XRGB444:	descr = "16-bit XRGB 4-4-4-4"; break;
1141	case V4L2_PIX_FMT_RGB555:	descr = "16-bit A/XRGB 1-5-5-5"; break;
1142	case V4L2_PIX_FMT_ARGB555:	descr = "16-bit ARGB 1-5-5-5"; break;
1143	case V4L2_PIX_FMT_XRGB555:	descr = "16-bit XRGB 1-5-5-5"; break;
1144	case V4L2_PIX_FMT_RGB565:	descr = "16-bit RGB 5-6-5"; break;
1145	case V4L2_PIX_FMT_RGB555X:	descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1146	case V4L2_PIX_FMT_ARGB555X:	descr = "16-bit ARGB 1-5-5-5 BE"; break;
1147	case V4L2_PIX_FMT_XRGB555X:	descr = "16-bit XRGB 1-5-5-5 BE"; break;
1148	case V4L2_PIX_FMT_RGB565X:	descr = "16-bit RGB 5-6-5 BE"; break;
1149	case V4L2_PIX_FMT_BGR666:	descr = "18-bit BGRX 6-6-6-14"; break;
1150	case V4L2_PIX_FMT_BGR24:	descr = "24-bit BGR 8-8-8"; break;
1151	case V4L2_PIX_FMT_RGB24:	descr = "24-bit RGB 8-8-8"; break;
1152	case V4L2_PIX_FMT_BGR32:	descr = "32-bit BGRA/X 8-8-8-8"; break;
1153	case V4L2_PIX_FMT_ABGR32:	descr = "32-bit BGRA 8-8-8-8"; break;
1154	case V4L2_PIX_FMT_XBGR32:	descr = "32-bit BGRX 8-8-8-8"; break;
1155	case V4L2_PIX_FMT_RGB32:	descr = "32-bit A/XRGB 8-8-8-8"; break;
1156	case V4L2_PIX_FMT_ARGB32:	descr = "32-bit ARGB 8-8-8-8"; break;
1157	case V4L2_PIX_FMT_XRGB32:	descr = "32-bit XRGB 8-8-8-8"; break;
1158	case V4L2_PIX_FMT_GREY:		descr = "8-bit Greyscale"; break;
1159	case V4L2_PIX_FMT_Y4:		descr = "4-bit Greyscale"; break;
1160	case V4L2_PIX_FMT_Y6:		descr = "6-bit Greyscale"; break;
1161	case V4L2_PIX_FMT_Y10:		descr = "10-bit Greyscale"; break;
1162	case V4L2_PIX_FMT_Y12:		descr = "12-bit Greyscale"; break;
1163	case V4L2_PIX_FMT_Y16:		descr = "16-bit Greyscale"; break;
1164	case V4L2_PIX_FMT_Y16_BE:	descr = "16-bit Greyscale BE"; break;
1165	case V4L2_PIX_FMT_Y10BPACK:	descr = "10-bit Greyscale (Packed)"; break;
1166	case V4L2_PIX_FMT_PAL8:		descr = "8-bit Palette"; break;
1167	case V4L2_PIX_FMT_UV8:		descr = "8-bit Chrominance UV 4-4"; break;
1168	case V4L2_PIX_FMT_YVU410:	descr = "Planar YVU 4:1:0"; break;
1169	case V4L2_PIX_FMT_YVU420:	descr = "Planar YVU 4:2:0"; break;
1170	case V4L2_PIX_FMT_YUYV:		descr = "YUYV 4:2:2"; break;
1171	case V4L2_PIX_FMT_YYUV:		descr = "YYUV 4:2:2"; break;
1172	case V4L2_PIX_FMT_YVYU:		descr = "YVYU 4:2:2"; break;
1173	case V4L2_PIX_FMT_UYVY:		descr = "UYVY 4:2:2"; break;
1174	case V4L2_PIX_FMT_VYUY:		descr = "VYUY 4:2:2"; break;
1175	case V4L2_PIX_FMT_YUV422P:	descr = "Planar YUV 4:2:2"; break;
1176	case V4L2_PIX_FMT_YUV411P:	descr = "Planar YUV 4:1:1"; break;
1177	case V4L2_PIX_FMT_Y41P:		descr = "YUV 4:1:1 (Packed)"; break;
1178	case V4L2_PIX_FMT_YUV444:	descr = "16-bit A/XYUV 4-4-4-4"; break;
1179	case V4L2_PIX_FMT_YUV555:	descr = "16-bit A/XYUV 1-5-5-5"; break;
1180	case V4L2_PIX_FMT_YUV565:	descr = "16-bit YUV 5-6-5"; break;
1181	case V4L2_PIX_FMT_YUV32:	descr = "32-bit A/XYUV 8-8-8-8"; break;
1182	case V4L2_PIX_FMT_YUV410:	descr = "Planar YUV 4:1:0"; break;
1183	case V4L2_PIX_FMT_YUV420:	descr = "Planar YUV 4:2:0"; break;
1184	case V4L2_PIX_FMT_HI240:	descr = "8-bit Dithered RGB (BTTV)"; break;
1185	case V4L2_PIX_FMT_HM12:		descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1186	case V4L2_PIX_FMT_M420:		descr = "YUV 4:2:0 (M420)"; break;
1187	case V4L2_PIX_FMT_NV12:		descr = "Y/CbCr 4:2:0"; break;
1188	case V4L2_PIX_FMT_NV21:		descr = "Y/CrCb 4:2:0"; break;
1189	case V4L2_PIX_FMT_NV16:		descr = "Y/CbCr 4:2:2"; break;
1190	case V4L2_PIX_FMT_NV61:		descr = "Y/CrCb 4:2:2"; break;
1191	case V4L2_PIX_FMT_NV24:		descr = "Y/CbCr 4:4:4"; break;
1192	case V4L2_PIX_FMT_NV42:		descr = "Y/CrCb 4:4:4"; break;
1193	case V4L2_PIX_FMT_NV12M:	descr = "Y/CbCr 4:2:0 (N-C)"; break;
1194	case V4L2_PIX_FMT_NV21M:	descr = "Y/CrCb 4:2:0 (N-C)"; break;
1195	case V4L2_PIX_FMT_NV16M:	descr = "Y/CbCr 4:2:2 (N-C)"; break;
1196	case V4L2_PIX_FMT_NV61M:	descr = "Y/CrCb 4:2:2 (N-C)"; break;
1197	case V4L2_PIX_FMT_NV12MT:	descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1198	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1199	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
1200	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
1201	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
1202	case V4L2_PIX_FMT_YVU422M:	descr = "Planar YVU 4:2:2 (N-C)"; break;
1203	case V4L2_PIX_FMT_YUV444M:	descr = "Planar YUV 4:4:4 (N-C)"; break;
1204	case V4L2_PIX_FMT_YVU444M:	descr = "Planar YVU 4:4:4 (N-C)"; break;
1205	case V4L2_PIX_FMT_SBGGR8:	descr = "8-bit Bayer BGBG/GRGR"; break;
1206	case V4L2_PIX_FMT_SGBRG8:	descr = "8-bit Bayer GBGB/RGRG"; break;
1207	case V4L2_PIX_FMT_SGRBG8:	descr = "8-bit Bayer GRGR/BGBG"; break;
1208	case V4L2_PIX_FMT_SRGGB8:	descr = "8-bit Bayer RGRG/GBGB"; break;
1209	case V4L2_PIX_FMT_SBGGR10:	descr = "10-bit Bayer BGBG/GRGR"; break;
1210	case V4L2_PIX_FMT_SGBRG10:	descr = "10-bit Bayer GBGB/RGRG"; break;
1211	case V4L2_PIX_FMT_SGRBG10:	descr = "10-bit Bayer GRGR/BGBG"; break;
1212	case V4L2_PIX_FMT_SRGGB10:	descr = "10-bit Bayer RGRG/GBGB"; break;
1213	case V4L2_PIX_FMT_SBGGR12:	descr = "12-bit Bayer BGBG/GRGR"; break;
1214	case V4L2_PIX_FMT_SGBRG12:	descr = "12-bit Bayer GBGB/RGRG"; break;
1215	case V4L2_PIX_FMT_SGRBG12:	descr = "12-bit Bayer GRGR/BGBG"; break;
1216	case V4L2_PIX_FMT_SRGGB12:	descr = "12-bit Bayer RGRG/GBGB"; break;
1217	case V4L2_PIX_FMT_SBGGR10P:	descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1218	case V4L2_PIX_FMT_SGBRG10P:	descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1219	case V4L2_PIX_FMT_SGRBG10P:	descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1220	case V4L2_PIX_FMT_SRGGB10P:	descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1221	case V4L2_PIX_FMT_SBGGR10ALAW8:	descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1222	case V4L2_PIX_FMT_SGBRG10ALAW8:	descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1223	case V4L2_PIX_FMT_SGRBG10ALAW8:	descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1224	case V4L2_PIX_FMT_SRGGB10ALAW8:	descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1225	case V4L2_PIX_FMT_SBGGR10DPCM8:	descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1226	case V4L2_PIX_FMT_SGBRG10DPCM8:	descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1227	case V4L2_PIX_FMT_SGRBG10DPCM8:	descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1228	case V4L2_PIX_FMT_SRGGB10DPCM8:	descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1229	case V4L2_PIX_FMT_SBGGR16:	descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
1230	case V4L2_PIX_FMT_SN9C20X_I420:	descr = "GSPCA SN9C20X I420"; break;
1231	case V4L2_PIX_FMT_SPCA501:	descr = "GSPCA SPCA501"; break;
1232	case V4L2_PIX_FMT_SPCA505:	descr = "GSPCA SPCA505"; break;
1233	case V4L2_PIX_FMT_SPCA508:	descr = "GSPCA SPCA508"; break;
1234	case V4L2_PIX_FMT_STV0680:	descr = "GSPCA STV0680"; break;
1235	case V4L2_PIX_FMT_TM6000:	descr = "A/V + VBI Mux Packet"; break;
1236	case V4L2_PIX_FMT_CIT_YYVYUY:	descr = "GSPCA CIT YYVYUY"; break;
1237	case V4L2_PIX_FMT_KONICA420:	descr = "GSPCA KONICA420"; break;
1238	case V4L2_SDR_FMT_CU8:		descr = "Complex U8"; break;
1239	case V4L2_SDR_FMT_CU16LE:	descr = "Complex U16LE"; break;
1240	case V4L2_SDR_FMT_CS8:		descr = "Complex S8"; break;
1241	case V4L2_SDR_FMT_CS14LE:	descr = "Complex S14LE"; break;
1242	case V4L2_SDR_FMT_RU12LE:	descr = "Real U12LE"; break;
1243
1244	default:
1245		/* Compressed formats */
1246		flags = V4L2_FMT_FLAG_COMPRESSED;
1247		switch (fmt->pixelformat) {
1248		/* Max description length mask:	descr = "0123456789012345678901234567890" */
1249		case V4L2_PIX_FMT_MJPEG:	descr = "Motion-JPEG"; break;
1250		case V4L2_PIX_FMT_JPEG:		descr = "JFIF JPEG"; break;
1251		case V4L2_PIX_FMT_DV:		descr = "1394"; break;
1252		case V4L2_PIX_FMT_MPEG:		descr = "MPEG-1/2/4"; break;
1253		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
1254		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
1255		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
1256		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
1257		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
1258		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
1259		case V4L2_PIX_FMT_MPEG4:	descr = "MPEG-4 part 2 ES"; break;
1260		case V4L2_PIX_FMT_XVID:		descr = "Xvid"; break;
1261		case V4L2_PIX_FMT_VC1_ANNEX_G:	descr = "VC-1 (SMPTE 412M Annex G)"; break;
1262		case V4L2_PIX_FMT_VC1_ANNEX_L:	descr = "VC-1 (SMPTE 412M Annex L)"; break;
1263		case V4L2_PIX_FMT_VP8:		descr = "VP8"; break;
1264		case V4L2_PIX_FMT_CPIA1:	descr = "GSPCA CPiA YUV"; break;
1265		case V4L2_PIX_FMT_WNVA:		descr = "WNVA"; break;
1266		case V4L2_PIX_FMT_SN9C10X:	descr = "GSPCA SN9C10X"; break;
1267		case V4L2_PIX_FMT_PWC1:		descr = "Raw Philips Webcam Type (Old)"; break;
1268		case V4L2_PIX_FMT_PWC2:		descr = "Raw Philips Webcam Type (New)"; break;
1269		case V4L2_PIX_FMT_ET61X251:	descr = "GSPCA ET61X251"; break;
1270		case V4L2_PIX_FMT_SPCA561:	descr = "GSPCA SPCA561"; break;
1271		case V4L2_PIX_FMT_PAC207:	descr = "GSPCA PAC207"; break;
1272		case V4L2_PIX_FMT_MR97310A:	descr = "GSPCA MR97310A"; break;
1273		case V4L2_PIX_FMT_JL2005BCD:	descr = "GSPCA JL2005BCD"; break;
1274		case V4L2_PIX_FMT_SN9C2028:	descr = "GSPCA SN9C2028"; break;
1275		case V4L2_PIX_FMT_SQ905C:	descr = "GSPCA SQ905C"; break;
1276		case V4L2_PIX_FMT_PJPG:		descr = "GSPCA PJPG"; break;
1277		case V4L2_PIX_FMT_OV511:	descr = "GSPCA OV511"; break;
1278		case V4L2_PIX_FMT_OV518:	descr = "GSPCA OV518"; break;
1279		case V4L2_PIX_FMT_JPGL:		descr = "JPEG Lite"; break;
1280		case V4L2_PIX_FMT_SE401:	descr = "GSPCA SE401"; break;
1281		case V4L2_PIX_FMT_S5C_UYVY_JPG:	descr = "S5C73MX interleaved UYVY/JPEG"; break;
1282		default:
1283			WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1284			if (fmt->description[0])
1285				return;
1286			flags = 0;
1287			snprintf(fmt->description, sz, "%c%c%c%c%s",
1288					(char)(fmt->pixelformat & 0x7f),
1289					(char)((fmt->pixelformat >> 8) & 0x7f),
1290					(char)((fmt->pixelformat >> 16) & 0x7f),
1291					(char)((fmt->pixelformat >> 24) & 0x7f),
1292					(fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1293			break;
1294		}
1295	}
1296
1297	if (descr)
1298		WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1299	fmt->flags = flags;
1300}
1301
1302static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1303				struct file *file, void *fh, void *arg)
1304{
1305	struct v4l2_fmtdesc *p = arg;
1306	struct video_device *vfd = video_devdata(file);
1307	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1308	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1309	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1310	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1311	int ret = -EINVAL;
1312
1313	switch (p->type) {
1314	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1315		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1316			break;
1317		ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1318		break;
1319	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1320		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1321			break;
1322		ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1323		break;
1324	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1325		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1326			break;
1327		ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1328		break;
1329	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1330		if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1331			break;
1332		ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1333		break;
1334	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1335		if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1336			break;
1337		ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1338		break;
1339	case V4L2_BUF_TYPE_SDR_CAPTURE:
1340		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1341			break;
1342		ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1343		break;
1344	case V4L2_BUF_TYPE_SDR_OUTPUT:
1345		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1346			break;
1347		ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1348		break;
1349	}
1350	if (ret == 0)
1351		v4l_fill_fmtdesc(p);
1352	return ret;
1353}
1354
1355static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1356				struct file *file, void *fh, void *arg)
1357{
1358	struct v4l2_format *p = arg;
1359	struct video_device *vfd = video_devdata(file);
1360	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1361	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1362	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1363	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1364	int ret;
1365
1366	/*
1367	 * fmt can't be cleared for these overlay types due to the 'clips'
1368	 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1369	 * Those are provided by the user. So handle these two overlay types
1370	 * first, and then just do a simple memset for the other types.
1371	 */
1372	switch (p->type) {
1373	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1374	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1375		struct v4l2_clip __user *clips = p->fmt.win.clips;
1376		u32 clipcount = p->fmt.win.clipcount;
1377		void __user *bitmap = p->fmt.win.bitmap;
1378
1379		memset(&p->fmt, 0, sizeof(p->fmt));
1380		p->fmt.win.clips = clips;
1381		p->fmt.win.clipcount = clipcount;
1382		p->fmt.win.bitmap = bitmap;
1383		break;
1384	}
1385	default:
1386		memset(&p->fmt, 0, sizeof(p->fmt));
1387		break;
1388	}
1389
1390	switch (p->type) {
1391	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1392		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1393			break;
1394		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1395		ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1396		/* just in case the driver zeroed it again */
1397		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1398		return ret;
1399	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1400		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1401			break;
1402		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1403	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1404		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1405			break;
1406		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1407	case V4L2_BUF_TYPE_VBI_CAPTURE:
1408		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1409			break;
1410		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1411	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1412		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1413			break;
1414		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1415	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1416		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1417			break;
1418		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1419		ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1420		/* just in case the driver zeroed it again */
1421		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1422		return ret;
1423	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1424		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1425			break;
1426		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1427	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1428		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1429			break;
1430		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1431	case V4L2_BUF_TYPE_VBI_OUTPUT:
1432		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1433			break;
1434		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1435	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1436		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1437			break;
1438		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1439	case V4L2_BUF_TYPE_SDR_CAPTURE:
1440		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1441			break;
1442		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1443	case V4L2_BUF_TYPE_SDR_OUTPUT:
1444		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1445			break;
1446		return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1447	}
1448	return -EINVAL;
1449}
1450
1451static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1452				struct file *file, void *fh, void *arg)
1453{
1454	struct v4l2_format *p = arg;
1455	struct video_device *vfd = video_devdata(file);
1456	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1457	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1458	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1459	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1460	int ret;
1461
1462	ret = v4l_enable_media_source(vfd);
1463	if (ret)
1464		return ret;
1465	v4l_sanitize_format(p);
1466
1467	switch (p->type) {
1468	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1469		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1470			break;
1471		CLEAR_AFTER_FIELD(p, fmt.pix);
1472		ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1473		/* just in case the driver zeroed it again */
1474		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1475		return ret;
1476	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1477		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1478			break;
1479		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1480		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1481	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1482		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1483			break;
1484		CLEAR_AFTER_FIELD(p, fmt.win);
1485		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1486	case V4L2_BUF_TYPE_VBI_CAPTURE:
1487		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1488			break;
1489		CLEAR_AFTER_FIELD(p, fmt.vbi);
1490		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1491	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1492		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1493			break;
1494		CLEAR_AFTER_FIELD(p, fmt.sliced);
1495		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1496	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1497		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1498			break;
1499		CLEAR_AFTER_FIELD(p, fmt.pix);
1500		ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1501		/* just in case the driver zeroed it again */
1502		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1503		return ret;
1504	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1505		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1506			break;
1507		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1508		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1509	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1510		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1511			break;
1512		CLEAR_AFTER_FIELD(p, fmt.win);
1513		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1514	case V4L2_BUF_TYPE_VBI_OUTPUT:
1515		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1516			break;
1517		CLEAR_AFTER_FIELD(p, fmt.vbi);
1518		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1519	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1520		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1521			break;
1522		CLEAR_AFTER_FIELD(p, fmt.sliced);
1523		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1524	case V4L2_BUF_TYPE_SDR_CAPTURE:
1525		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1526			break;
1527		CLEAR_AFTER_FIELD(p, fmt.sdr);
1528		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1529	case V4L2_BUF_TYPE_SDR_OUTPUT:
1530		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1531			break;
1532		CLEAR_AFTER_FIELD(p, fmt.sdr);
1533		return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1534	}
1535	return -EINVAL;
1536}
1537
1538static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1539				struct file *file, void *fh, void *arg)
1540{
1541	struct v4l2_format *p = arg;
1542	struct video_device *vfd = video_devdata(file);
1543	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1544	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1545	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1546	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1547	int ret;
1548
1549	v4l_sanitize_format(p);
1550
1551	switch (p->type) {
1552	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1553		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1554			break;
1555		CLEAR_AFTER_FIELD(p, fmt.pix);
1556		ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1557		/* just in case the driver zeroed it again */
1558		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1559		return ret;
1560	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1561		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1562			break;
1563		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1564		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1565	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1566		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1567			break;
1568		CLEAR_AFTER_FIELD(p, fmt.win);
1569		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1570	case V4L2_BUF_TYPE_VBI_CAPTURE:
1571		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1572			break;
1573		CLEAR_AFTER_FIELD(p, fmt.vbi);
1574		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1575	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1576		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1577			break;
1578		CLEAR_AFTER_FIELD(p, fmt.sliced);
1579		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1580	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1581		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1582			break;
1583		CLEAR_AFTER_FIELD(p, fmt.pix);
1584		ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1585		/* just in case the driver zeroed it again */
1586		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1587		return ret;
1588	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1589		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1590			break;
1591		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1592		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1593	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1594		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1595			break;
1596		CLEAR_AFTER_FIELD(p, fmt.win);
1597		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1598	case V4L2_BUF_TYPE_VBI_OUTPUT:
1599		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1600			break;
1601		CLEAR_AFTER_FIELD(p, fmt.vbi);
1602		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1603	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1604		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1605			break;
1606		CLEAR_AFTER_FIELD(p, fmt.sliced);
1607		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1608	case V4L2_BUF_TYPE_SDR_CAPTURE:
1609		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1610			break;
1611		CLEAR_AFTER_FIELD(p, fmt.sdr);
1612		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1613	case V4L2_BUF_TYPE_SDR_OUTPUT:
1614		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1615			break;
1616		CLEAR_AFTER_FIELD(p, fmt.sdr);
1617		return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1618	}
1619	return -EINVAL;
1620}
1621
1622static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1623				struct file *file, void *fh, void *arg)
1624{
1625	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1626}
1627
1628static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1629				struct file *file, void *fh, void *arg)
1630{
1631	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1632}
1633
1634static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1635				struct file *file, void *fh, void *arg)
1636{
1637	struct video_device *vfd = video_devdata(file);
1638	struct v4l2_tuner *p = arg;
1639	int err;
1640
1641	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1642			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1643	err = ops->vidioc_g_tuner(file, fh, p);
1644	if (!err)
1645		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1646	return err;
1647}
1648
1649static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1650				struct file *file, void *fh, void *arg)
1651{
1652	struct video_device *vfd = video_devdata(file);
1653	struct v4l2_tuner *p = arg;
1654	int ret;
1655
1656	ret = v4l_enable_media_source(vfd);
1657	if (ret)
1658		return ret;
1659	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1660			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1661	return ops->vidioc_s_tuner(file, fh, p);
1662}
1663
1664static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1665				struct file *file, void *fh, void *arg)
1666{
1667	struct video_device *vfd = video_devdata(file);
1668	struct v4l2_modulator *p = arg;
1669	int err;
1670
1671	if (vfd->vfl_type == VFL_TYPE_RADIO)
1672		p->type = V4L2_TUNER_RADIO;
1673
1674	err = ops->vidioc_g_modulator(file, fh, p);
1675	if (!err)
1676		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1677	return err;
1678}
1679
1680static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1681				struct file *file, void *fh, void *arg)
1682{
1683	struct video_device *vfd = video_devdata(file);
1684	struct v4l2_modulator *p = arg;
1685
1686	if (vfd->vfl_type == VFL_TYPE_RADIO)
1687		p->type = V4L2_TUNER_RADIO;
1688
1689	return ops->vidioc_s_modulator(file, fh, p);
1690}
1691
1692static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1693				struct file *file, void *fh, void *arg)
1694{
1695	struct video_device *vfd = video_devdata(file);
1696	struct v4l2_frequency *p = arg;
1697
1698	if (vfd->vfl_type == VFL_TYPE_SDR)
1699		p->type = V4L2_TUNER_SDR;
1700	else
1701		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1702				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1703	return ops->vidioc_g_frequency(file, fh, p);
1704}
1705
1706static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1707				struct file *file, void *fh, void *arg)
1708{
1709	struct video_device *vfd = video_devdata(file);
1710	const struct v4l2_frequency *p = arg;
1711	enum v4l2_tuner_type type;
1712	int ret;
1713
1714	ret = v4l_enable_media_source(vfd);
1715	if (ret)
1716		return ret;
1717	if (vfd->vfl_type == VFL_TYPE_SDR) {
1718		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1719			return -EINVAL;
1720	} else {
1721		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1722				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1723		if (type != p->type)
1724			return -EINVAL;
1725	}
1726	return ops->vidioc_s_frequency(file, fh, p);
1727}
1728
1729static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1730				struct file *file, void *fh, void *arg)
1731{
1732	struct video_device *vfd = video_devdata(file);
1733	struct v4l2_standard *p = arg;
1734	v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1735	unsigned int index = p->index, i, j = 0;
1736	const char *descr = "";
1737
1738	/* Return -ENODATA if the tvnorms for the current input
1739	   or output is 0, meaning that it doesn't support this API. */
1740	if (id == 0)
1741		return -ENODATA;
1742
1743	/* Return norm array in a canonical way */
1744	for (i = 0; i <= index && id; i++) {
1745		/* last std value in the standards array is 0, so this
1746		   while always ends there since (id & 0) == 0. */
1747		while ((id & standards[j].std) != standards[j].std)
1748			j++;
1749		curr_id = standards[j].std;
1750		descr = standards[j].descr;
1751		j++;
1752		if (curr_id == 0)
1753			break;
1754		if (curr_id != V4L2_STD_PAL &&
1755				curr_id != V4L2_STD_SECAM &&
1756				curr_id != V4L2_STD_NTSC)
1757			id &= ~curr_id;
1758	}
1759	if (i <= index)
1760		return -EINVAL;
1761
1762	v4l2_video_std_construct(p, curr_id, descr);
1763	return 0;
1764}
1765
1766static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1767				struct file *file, void *fh, void *arg)
1768{
1769	struct video_device *vfd = video_devdata(file);
1770	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1771	int ret;
1772
1773	ret = v4l_enable_media_source(vfd);
1774	if (ret)
1775		return ret;
1776	norm = id & vfd->tvnorms;
1777	if (vfd->tvnorms && !norm)	/* Check if std is supported */
1778		return -EINVAL;
1779
1780	/* Calls the specific handler */
1781	return ops->vidioc_s_std(file, fh, norm);
1782}
1783
1784static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1785				struct file *file, void *fh, void *arg)
1786{
1787	struct video_device *vfd = video_devdata(file);
1788	v4l2_std_id *p = arg;
1789	int ret;
1790
1791	ret = v4l_enable_media_source(vfd);
1792	if (ret)
1793		return ret;
1794	/*
1795	 * If no signal is detected, then the driver should return
1796	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1797	 * any standards that do not apply removed.
1798	 *
1799	 * This means that tuners, audio and video decoders can join
1800	 * their efforts to improve the standards detection.
1801	 */
1802	*p = vfd->tvnorms;
1803	return ops->vidioc_querystd(file, fh, arg);
1804}
1805
1806static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1807				struct file *file, void *fh, void *arg)
1808{
1809	struct video_device *vfd = video_devdata(file);
1810	struct v4l2_hw_freq_seek *p = arg;
1811	enum v4l2_tuner_type type;
1812	int ret;
1813
1814	ret = v4l_enable_media_source(vfd);
1815	if (ret)
1816		return ret;
1817	/* s_hw_freq_seek is not supported for SDR for now */
1818	if (vfd->vfl_type == VFL_TYPE_SDR)
1819		return -EINVAL;
1820
1821	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1822		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1823	if (p->type != type)
1824		return -EINVAL;
1825	return ops->vidioc_s_hw_freq_seek(file, fh, p);
1826}
1827
1828static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1829				struct file *file, void *fh, void *arg)
1830{
1831	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1832}
1833
1834static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1835				struct file *file, void *fh, void *arg)
1836{
1837	struct v4l2_requestbuffers *p = arg;
1838	int ret = check_fmt(file, p->type);
1839
1840	if (ret)
1841		return ret;
1842
1843	CLEAR_AFTER_FIELD(p, memory);
1844
1845	return ops->vidioc_reqbufs(file, fh, p);
1846}
1847
1848static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1849				struct file *file, void *fh, void *arg)
1850{
1851	struct v4l2_buffer *p = arg;
1852	int ret = check_fmt(file, p->type);
1853
1854	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1855}
1856
1857static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1858				struct file *file, void *fh, void *arg)
1859{
1860	struct v4l2_buffer *p = arg;
1861	int ret = check_fmt(file, p->type);
1862
1863	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1864}
1865
1866static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1867				struct file *file, void *fh, void *arg)
1868{
1869	struct v4l2_buffer *p = arg;
1870	int ret = check_fmt(file, p->type);
1871
1872	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1873}
1874
1875static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1876				struct file *file, void *fh, void *arg)
1877{
1878	struct v4l2_create_buffers *create = arg;
1879	int ret = check_fmt(file, create->format.type);
1880
1881	if (ret)
1882		return ret;
1883
1884	CLEAR_AFTER_FIELD(create, format);
1885
1886	v4l_sanitize_format(&create->format);
1887
1888	ret = ops->vidioc_create_bufs(file, fh, create);
1889
1890	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1891	    create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1892		create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1893
1894	return ret;
1895}
1896
1897static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1898				struct file *file, void *fh, void *arg)
1899{
1900	struct v4l2_buffer *b = arg;
1901	int ret = check_fmt(file, b->type);
1902
1903	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1904}
1905
1906static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1907				struct file *file, void *fh, void *arg)
1908{
1909	struct v4l2_streamparm *p = arg;
1910	v4l2_std_id std;
1911	int ret = check_fmt(file, p->type);
1912
1913	if (ret)
1914		return ret;
1915	if (ops->vidioc_g_parm)
1916		return ops->vidioc_g_parm(file, fh, p);
1917	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1918	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1919		return -EINVAL;
1920	p->parm.capture.readbuffers = 2;
1921	ret = ops->vidioc_g_std(file, fh, &std);
1922	if (ret == 0)
1923		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1924	return ret;
1925}
1926
1927static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1928				struct file *file, void *fh, void *arg)
1929{
1930	struct v4l2_streamparm *p = arg;
1931	int ret = check_fmt(file, p->type);
1932
1933	return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1934}
1935
1936static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1937				struct file *file, void *fh, void *arg)
1938{
1939	struct video_device *vfd = video_devdata(file);
1940	struct v4l2_queryctrl *p = arg;
1941	struct v4l2_fh *vfh =
1942		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1943
1944	if (vfh && vfh->ctrl_handler)
1945		return v4l2_queryctrl(vfh->ctrl_handler, p);
1946	if (vfd->ctrl_handler)
1947		return v4l2_queryctrl(vfd->ctrl_handler, p);
1948	if (ops->vidioc_queryctrl)
1949		return ops->vidioc_queryctrl(file, fh, p);
1950	return -ENOTTY;
1951}
1952
1953static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1954				struct file *file, void *fh, void *arg)
1955{
1956	struct video_device *vfd = video_devdata(file);
1957	struct v4l2_query_ext_ctrl *p = arg;
1958	struct v4l2_fh *vfh =
1959		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1960
1961	if (vfh && vfh->ctrl_handler)
1962		return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1963	if (vfd->ctrl_handler)
1964		return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1965	if (ops->vidioc_query_ext_ctrl)
1966		return ops->vidioc_query_ext_ctrl(file, fh, p);
1967	return -ENOTTY;
1968}
1969
1970static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1971				struct file *file, void *fh, void *arg)
1972{
1973	struct video_device *vfd = video_devdata(file);
1974	struct v4l2_querymenu *p = arg;
1975	struct v4l2_fh *vfh =
1976		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1977
1978	if (vfh && vfh->ctrl_handler)
1979		return v4l2_querymenu(vfh->ctrl_handler, p);
1980	if (vfd->ctrl_handler)
1981		return v4l2_querymenu(vfd->ctrl_handler, p);
1982	if (ops->vidioc_querymenu)
1983		return ops->vidioc_querymenu(file, fh, p);
1984	return -ENOTTY;
1985}
1986
1987static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1988				struct file *file, void *fh, void *arg)
1989{
1990	struct video_device *vfd = video_devdata(file);
1991	struct v4l2_control *p = arg;
1992	struct v4l2_fh *vfh =
1993		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1994	struct v4l2_ext_controls ctrls;
1995	struct v4l2_ext_control ctrl;
1996
1997	if (vfh && vfh->ctrl_handler)
1998		return v4l2_g_ctrl(vfh->ctrl_handler, p);
1999	if (vfd->ctrl_handler)
2000		return v4l2_g_ctrl(vfd->ctrl_handler, p);
2001	if (ops->vidioc_g_ctrl)
2002		return ops->vidioc_g_ctrl(file, fh, p);
2003	if (ops->vidioc_g_ext_ctrls == NULL)
2004		return -ENOTTY;
2005
2006	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2007	ctrls.count = 1;
2008	ctrls.controls = &ctrl;
2009	ctrl.id = p->id;
2010	ctrl.value = p->value;
2011	if (check_ext_ctrls(&ctrls, 1)) {
2012		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2013
2014		if (ret == 0)
2015			p->value = ctrl.value;
2016		return ret;
2017	}
2018	return -EINVAL;
2019}
2020
2021static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2022				struct file *file, void *fh, void *arg)
2023{
2024	struct video_device *vfd = video_devdata(file);
2025	struct v4l2_control *p = arg;
2026	struct v4l2_fh *vfh =
2027		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2028	struct v4l2_ext_controls ctrls;
2029	struct v4l2_ext_control ctrl;
2030
2031	if (vfh && vfh->ctrl_handler)
2032		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2033	if (vfd->ctrl_handler)
2034		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2035	if (ops->vidioc_s_ctrl)
2036		return ops->vidioc_s_ctrl(file, fh, p);
2037	if (ops->vidioc_s_ext_ctrls == NULL)
2038		return -ENOTTY;
2039
2040	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2041	ctrls.count = 1;
2042	ctrls.controls = &ctrl;
2043	ctrl.id = p->id;
2044	ctrl.value = p->value;
2045	if (check_ext_ctrls(&ctrls, 1))
2046		return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2047	return -EINVAL;
2048}
2049
2050static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2051				struct file *file, void *fh, void *arg)
2052{
2053	struct video_device *vfd = video_devdata(file);
2054	struct v4l2_ext_controls *p = arg;
2055	struct v4l2_fh *vfh =
2056		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2057
2058	p->error_idx = p->count;
2059	if (vfh && vfh->ctrl_handler)
2060		return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2061	if (vfd->ctrl_handler)
2062		return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2063	if (ops->vidioc_g_ext_ctrls == NULL)
2064		return -ENOTTY;
2065	return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2066					-EINVAL;
2067}
2068
2069static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2070				struct file *file, void *fh, void *arg)
2071{
2072	struct video_device *vfd = video_devdata(file);
2073	struct v4l2_ext_controls *p = arg;
2074	struct v4l2_fh *vfh =
2075		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2076
2077	p->error_idx = p->count;
2078	if (vfh && vfh->ctrl_handler)
2079		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2080	if (vfd->ctrl_handler)
2081		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2082	if (ops->vidioc_s_ext_ctrls == NULL)
2083		return -ENOTTY;
2084	return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2085					-EINVAL;
2086}
2087
2088static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2089				struct file *file, void *fh, void *arg)
2090{
2091	struct video_device *vfd = video_devdata(file);
2092	struct v4l2_ext_controls *p = arg;
2093	struct v4l2_fh *vfh =
2094		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2095
2096	p->error_idx = p->count;
2097	if (vfh && vfh->ctrl_handler)
2098		return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2099	if (vfd->ctrl_handler)
2100		return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2101	if (ops->vidioc_try_ext_ctrls == NULL)
2102		return -ENOTTY;
2103	return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2104					-EINVAL;
2105}
2106
2107static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2108				struct file *file, void *fh, void *arg)
2109{
2110	struct v4l2_crop *p = arg;
2111	struct v4l2_selection s = {
2112		.type = p->type,
2113	};
2114	int ret;
2115
2116	if (ops->vidioc_g_crop)
2117		return ops->vidioc_g_crop(file, fh, p);
2118	/* simulate capture crop using selection api */
2119
2120	/* crop means compose for output devices */
2121	if (V4L2_TYPE_IS_OUTPUT(p->type))
2122		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2123	else
2124		s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2125
2126	ret = ops->vidioc_g_selection(file, fh, &s);
2127
2128	/* copying results to old structure on success */
2129	if (!ret)
2130		p->c = s.r;
2131	return ret;
2132}
2133
2134static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2135				struct file *file, void *fh, void *arg)
2136{
2137	struct v4l2_crop *p = arg;
2138	struct v4l2_selection s = {
2139		.type = p->type,
2140		.r = p->c,
2141	};
2142
2143	if (ops->vidioc_s_crop)
2144		return ops->vidioc_s_crop(file, fh, p);
2145	/* simulate capture crop using selection api */
2146
2147	/* crop means compose for output devices */
2148	if (V4L2_TYPE_IS_OUTPUT(p->type))
2149		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2150	else
2151		s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2152
2153	return ops->vidioc_s_selection(file, fh, &s);
2154}
2155
2156static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2157				struct file *file, void *fh, void *arg)
2158{
2159	struct v4l2_cropcap *p = arg;
2160
2161	if (ops->vidioc_g_selection) {
2162		struct v4l2_selection s = { .type = p->type };
2163		int ret;
2164
2165		/* obtaining bounds */
2166		if (V4L2_TYPE_IS_OUTPUT(p->type))
2167			s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2168		else
2169			s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2170
2171		ret = ops->vidioc_g_selection(file, fh, &s);
2172		if (ret)
2173			return ret;
2174		p->bounds = s.r;
2175
2176		/* obtaining defrect */
2177		if (V4L2_TYPE_IS_OUTPUT(p->type))
2178			s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2179		else
2180			s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2181
2182		ret = ops->vidioc_g_selection(file, fh, &s);
2183		if (ret)
2184			return ret;
2185		p->defrect = s.r;
2186	}
2187
2188	/* setting trivial pixelaspect */
2189	p->pixelaspect.numerator = 1;
2190	p->pixelaspect.denominator = 1;
2191
2192	if (ops->vidioc_cropcap)
2193		return ops->vidioc_cropcap(file, fh, p);
2194
2195	return 0;
2196}
2197
2198static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2199				struct file *file, void *fh, void *arg)
2200{
2201	struct video_device *vfd = video_devdata(file);
2202	int ret;
2203
2204	if (vfd->v4l2_dev)
2205		pr_info("%s: =================  START STATUS  =================\n",
2206			vfd->v4l2_dev->name);
2207	ret = ops->vidioc_log_status(file, fh);
2208	if (vfd->v4l2_dev)
2209		pr_info("%s: ==================  END STATUS  ==================\n",
2210			vfd->v4l2_dev->name);
2211	return ret;
2212}
2213
2214static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2215				struct file *file, void *fh, void *arg)
2216{
2217#ifdef CONFIG_VIDEO_ADV_DEBUG
2218	struct v4l2_dbg_register *p = arg;
2219	struct video_device *vfd = video_devdata(file);
2220	struct v4l2_subdev *sd;
2221	int idx = 0;
2222
2223	if (!capable(CAP_SYS_ADMIN))
2224		return -EPERM;
2225	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2226		if (vfd->v4l2_dev == NULL)
2227			return -EINVAL;
2228		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2229			if (p->match.addr == idx++)
2230				return v4l2_subdev_call(sd, core, g_register, p);
2231		return -EINVAL;
2232	}
2233	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2234	    (ops->vidioc_g_chip_info || p->match.addr == 0))
2235		return ops->vidioc_g_register(file, fh, p);
2236	return -EINVAL;
2237#else
2238	return -ENOTTY;
2239#endif
2240}
2241
2242static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2243				struct file *file, void *fh, void *arg)
2244{
2245#ifdef CONFIG_VIDEO_ADV_DEBUG
2246	const struct v4l2_dbg_register *p = arg;
2247	struct video_device *vfd = video_devdata(file);
2248	struct v4l2_subdev *sd;
2249	int idx = 0;
2250
2251	if (!capable(CAP_SYS_ADMIN))
2252		return -EPERM;
2253	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2254		if (vfd->v4l2_dev == NULL)
2255			return -EINVAL;
2256		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2257			if (p->match.addr == idx++)
2258				return v4l2_subdev_call(sd, core, s_register, p);
2259		return -EINVAL;
2260	}
2261	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2262	    (ops->vidioc_g_chip_info || p->match.addr == 0))
2263		return ops->vidioc_s_register(file, fh, p);
2264	return -EINVAL;
2265#else
2266	return -ENOTTY;
2267#endif
2268}
2269
2270static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2271				struct file *file, void *fh, void *arg)
2272{
2273#ifdef CONFIG_VIDEO_ADV_DEBUG
2274	struct video_device *vfd = video_devdata(file);
2275	struct v4l2_dbg_chip_info *p = arg;
2276	struct v4l2_subdev *sd;
2277	int idx = 0;
2278
2279	switch (p->match.type) {
2280	case V4L2_CHIP_MATCH_BRIDGE:
2281		if (ops->vidioc_s_register)
2282			p->flags |= V4L2_CHIP_FL_WRITABLE;
2283		if (ops->vidioc_g_register)
2284			p->flags |= V4L2_CHIP_FL_READABLE;
2285		strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2286		if (ops->vidioc_g_chip_info)
2287			return ops->vidioc_g_chip_info(file, fh, arg);
2288		if (p->match.addr)
2289			return -EINVAL;
2290		return 0;
2291
2292	case V4L2_CHIP_MATCH_SUBDEV:
2293		if (vfd->v4l2_dev == NULL)
2294			break;
2295		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2296			if (p->match.addr != idx++)
2297				continue;
2298			if (sd->ops->core && sd->ops->core->s_register)
2299				p->flags |= V4L2_CHIP_FL_WRITABLE;
2300			if (sd->ops->core && sd->ops->core->g_register)
2301				p->flags |= V4L2_CHIP_FL_READABLE;
2302			strlcpy(p->name, sd->name, sizeof(p->name));
2303			return 0;
2304		}
2305		break;
2306	}
2307	return -EINVAL;
2308#else
2309	return -ENOTTY;
2310#endif
2311}
2312
2313static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2314				struct file *file, void *fh, void *arg)
2315{
2316	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2317}
2318
2319static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2320				struct file *file, void *fh, void *arg)
2321{
2322	return ops->vidioc_subscribe_event(fh, arg);
2323}
2324
2325static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2326				struct file *file, void *fh, void *arg)
2327{
2328	return ops->vidioc_unsubscribe_event(fh, arg);
2329}
2330
2331static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2332				struct file *file, void *fh, void *arg)
2333{
2334	struct v4l2_sliced_vbi_cap *p = arg;
2335	int ret = check_fmt(file, p->type);
2336
2337	if (ret)
2338		return ret;
2339
2340	/* Clear up to type, everything after type is zeroed already */
2341	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2342
2343	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2344}
2345
2346static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2347				struct file *file, void *fh, void *arg)
2348{
2349	struct video_device *vfd = video_devdata(file);
2350	struct v4l2_frequency_band *p = arg;
2351	enum v4l2_tuner_type type;
2352	int err;
2353
2354	if (vfd->vfl_type == VFL_TYPE_SDR) {
2355		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2356			return -EINVAL;
2357		type = p->type;
2358	} else {
2359		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2360				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2361		if (type != p->type)
2362			return -EINVAL;
2363	}
2364	if (ops->vidioc_enum_freq_bands) {
2365		err = ops->vidioc_enum_freq_bands(file, fh, p);
2366		if (err != -ENOTTY)
2367			return err;
2368	}
2369	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2370		struct v4l2_tuner t = {
2371			.index = p->tuner,
2372			.type = type,
2373		};
2374
2375		if (p->index)
2376			return -EINVAL;
2377		err = ops->vidioc_g_tuner(file, fh, &t);
2378		if (err)
2379			return err;
2380		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2381		p->rangelow = t.rangelow;
2382		p->rangehigh = t.rangehigh;
2383		p->modulation = (type == V4L2_TUNER_RADIO) ?
2384			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2385		return 0;
2386	}
2387	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2388		struct v4l2_modulator m = {
2389			.index = p->tuner,
2390		};
2391
2392		if (type != V4L2_TUNER_RADIO)
2393			return -EINVAL;
2394		if (p->index)
2395			return -EINVAL;
2396		err = ops->vidioc_g_modulator(file, fh, &m);
2397		if (err)
2398			return err;
2399		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2400		p->rangelow = m.rangelow;
2401		p->rangehigh = m.rangehigh;
2402		p->modulation = (type == V4L2_TUNER_RADIO) ?
2403			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2404		return 0;
2405	}
2406	return -ENOTTY;
2407}
2408
2409struct v4l2_ioctl_info {
2410	unsigned int ioctl;
2411	u32 flags;
2412	const char * const name;
2413	union {
2414		u32 offset;
2415		int (*func)(const struct v4l2_ioctl_ops *ops,
2416				struct file *file, void *fh, void *p);
2417	} u;
2418	void (*debug)(const void *arg, bool write_only);
2419};
2420
2421/* This control needs a priority check */
2422#define INFO_FL_PRIO	(1 << 0)
2423/* This control can be valid if the filehandle passes a control handler. */
2424#define INFO_FL_CTRL	(1 << 1)
2425/* This is a standard ioctl, no need for special code */
2426#define INFO_FL_STD	(1 << 2)
2427/* This is ioctl has its own function */
2428#define INFO_FL_FUNC	(1 << 3)
2429/* Queuing ioctl */
2430#define INFO_FL_QUEUE	(1 << 4)
2431/* Zero struct from after the field to the end */
2432#define INFO_FL_CLEAR(v4l2_struct, field)			\
2433	((offsetof(struct v4l2_struct, field) +			\
2434	  sizeof(((struct v4l2_struct *)0)->field)) << 16)
2435#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2436
2437#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)			\
2438	[_IOC_NR(_ioctl)] = {						\
2439		.ioctl = _ioctl,					\
2440		.flags = _flags | INFO_FL_STD,				\
2441		.name = #_ioctl,					\
2442		.u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),	\
2443		.debug = _debug,					\
2444	}
2445
2446#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)			\
2447	[_IOC_NR(_ioctl)] = {						\
2448		.ioctl = _ioctl,					\
2449		.flags = _flags | INFO_FL_FUNC,				\
2450		.name = #_ioctl,					\
2451		.u.func = _func,					\
2452		.debug = _debug,					\
2453	}
2454
2455static struct v4l2_ioctl_info v4l2_ioctls[] = {
2456	IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2457	IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2458	IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2459	IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2460	IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2461	IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2462	IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2463	IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2464	IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2465	IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2466	IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2467	IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2468	IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2469	IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2470	IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2471	IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2472	IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2473	IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2474	IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2475	IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2476	IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2477	IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2478	IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2479	IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2480	IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2481	IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2482	IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2483	IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2484	IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2485	IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2486	IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2487	IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2488	IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2489	IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2490	IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2491	IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2492	IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2493	IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2494	IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2495	IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2496	IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2497	IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2498	IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2499	IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2500	IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2501	IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2502	IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2503	IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2504	IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2505	IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2506	IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2507	IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2508	IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2509	IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2510	IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2511	IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2512	IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2513	IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2514	IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2515	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2516	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2517	IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2518	IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2519	IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2520	IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2521	IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2522	IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2523	IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2524	IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2525	IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2526	IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2527	IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2528	IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2529	IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2530	IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2531	IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2532	IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2533	IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2534	IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2535	IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2536	IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2537	IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2538};
2539#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2540
2541bool v4l2_is_known_ioctl(unsigned int cmd)
2542{
2543	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2544		return false;
2545	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2546}
2547
2548struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2549{
2550	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2551		return vdev->lock;
2552	if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2553		return NULL;
2554	if (vdev->queue && vdev->queue->lock &&
2555			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2556		return vdev->queue->lock;
2557	return vdev->lock;
2558}
2559
2560/* Common ioctl debug function. This function can be used by
2561   external ioctl messages as well as internal V4L ioctl */
2562void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2563{
2564	const char *dir, *type;
2565
2566	if (prefix)
2567		printk(KERN_DEBUG "%s: ", prefix);
2568
2569	switch (_IOC_TYPE(cmd)) {
2570	case 'd':
2571		type = "v4l2_int";
2572		break;
2573	case 'V':
2574		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2575			type = "v4l2";
2576			break;
2577		}
2578		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2579		return;
2580	default:
2581		type = "unknown";
2582		break;
2583	}
2584
2585	switch (_IOC_DIR(cmd)) {
2586	case _IOC_NONE:              dir = "--"; break;
2587	case _IOC_READ:              dir = "r-"; break;
2588	case _IOC_WRITE:             dir = "-w"; break;
2589	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2590	default:                     dir = "*ERR*"; break;
2591	}
2592	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2593		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2594}
2595EXPORT_SYMBOL(v4l_printk_ioctl);
2596
2597static long __video_do_ioctl(struct file *file,
2598		unsigned int cmd, void *arg)
2599{
2600	struct video_device *vfd = video_devdata(file);
2601	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2602	bool write_only = false;
2603	struct v4l2_ioctl_info default_info;
2604	const struct v4l2_ioctl_info *info;
2605	void *fh = file->private_data;
2606	struct v4l2_fh *vfh = NULL;
2607	int dev_debug = vfd->dev_debug;
2608	long ret = -ENOTTY;
2609
2610	if (ops == NULL) {
2611		pr_warn("%s: has no ioctl_ops.\n",
2612				video_device_node_name(vfd));
2613		return ret;
2614	}
2615
2616	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2617		vfh = file->private_data;
2618
2619	if (v4l2_is_known_ioctl(cmd)) {
2620		info = &v4l2_ioctls[_IOC_NR(cmd)];
2621
2622		if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2623		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2624			goto done;
2625
2626		if (vfh && (info->flags & INFO_FL_PRIO)) {
2627			ret = v4l2_prio_check(vfd->prio, vfh->prio);
2628			if (ret)
2629				goto done;
2630		}
2631	} else {
2632		default_info.ioctl = cmd;
2633		default_info.flags = 0;
2634		default_info.debug = v4l_print_default;
2635		info = &default_info;
2636	}
2637
2638	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2639	if (info->flags & INFO_FL_STD) {
2640		typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2641		const void *p = vfd->ioctl_ops;
2642		const vidioc_op *vidioc = p + info->u.offset;
2643
2644		ret = (*vidioc)(file, fh, arg);
2645	} else if (info->flags & INFO_FL_FUNC) {
2646		ret = info->u.func(ops, file, fh, arg);
2647	} else if (!ops->vidioc_default) {
2648		ret = -ENOTTY;
2649	} else {
2650		ret = ops->vidioc_default(file, fh,
2651			vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2652			cmd, arg);
2653	}
2654
2655done:
2656	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2657		if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2658		    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2659			return ret;
2660
2661		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2662		if (ret < 0)
2663			pr_cont(": error %ld", ret);
2664		if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2665			pr_cont("\n");
2666		else if (_IOC_DIR(cmd) == _IOC_NONE)
2667			info->debug(arg, write_only);
2668		else {
2669			pr_cont(": ");
2670			info->debug(arg, write_only);
2671		}
2672	}
2673
2674	return ret;
2675}
2676
2677static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2678			    void __user **user_ptr, void ***kernel_ptr)
2679{
2680	int ret = 0;
2681
2682	switch (cmd) {
2683	case VIDIOC_PREPARE_BUF:
2684	case VIDIOC_QUERYBUF:
2685	case VIDIOC_QBUF:
2686	case VIDIOC_DQBUF: {
2687		struct v4l2_buffer *buf = parg;
2688
2689		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2690			if (buf->length > VIDEO_MAX_PLANES) {
2691				ret = -EINVAL;
2692				break;
2693			}
2694			*user_ptr = (void __user *)buf->m.planes;
2695			*kernel_ptr = (void **)&buf->m.planes;
2696			*array_size = sizeof(struct v4l2_plane) * buf->length;
2697			ret = 1;
2698		}
2699		break;
2700	}
2701
2702	case VIDIOC_G_EDID:
2703	case VIDIOC_S_EDID: {
2704		struct v4l2_edid *edid = parg;
2705
2706		if (edid->blocks) {
2707			if (edid->blocks > 256) {
2708				ret = -EINVAL;
2709				break;
2710			}
2711			*user_ptr = (void __user *)edid->edid;
2712			*kernel_ptr = (void **)&edid->edid;
2713			*array_size = edid->blocks * 128;
2714			ret = 1;
2715		}
2716		break;
2717	}
2718
2719	case VIDIOC_S_EXT_CTRLS:
2720	case VIDIOC_G_EXT_CTRLS:
2721	case VIDIOC_TRY_EXT_CTRLS: {
2722		struct v4l2_ext_controls *ctrls = parg;
2723
2724		if (ctrls->count != 0) {
2725			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2726				ret = -EINVAL;
2727				break;
2728			}
2729			*user_ptr = (void __user *)ctrls->controls;
2730			*kernel_ptr = (void **)&ctrls->controls;
2731			*array_size = sizeof(struct v4l2_ext_control)
2732				    * ctrls->count;
2733			ret = 1;
2734		}
2735		break;
2736	}
2737	}
2738
2739	return ret;
2740}
2741
2742long
2743video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2744	       v4l2_kioctl func)
2745{
2746	char	sbuf[128];
2747	void    *mbuf = NULL;
2748	void	*parg = (void *)arg;
2749	long	err  = -EINVAL;
2750	bool	has_array_args;
2751	size_t  array_size = 0;
2752	void __user *user_ptr = NULL;
2753	void	**kernel_ptr = NULL;
2754
2755	/*  Copy arguments into temp kernel buffer  */
2756	if (_IOC_DIR(cmd) != _IOC_NONE) {
2757		if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2758			parg = sbuf;
2759		} else {
2760			/* too big to allocate from stack */
2761			mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2762			if (NULL == mbuf)
2763				return -ENOMEM;
2764			parg = mbuf;
2765		}
2766
2767		err = -EFAULT;
2768		if (_IOC_DIR(cmd) & _IOC_WRITE) {
2769			unsigned int n = _IOC_SIZE(cmd);
2770
2771			/*
2772			 * In some cases, only a few fields are used as input,
2773			 * i.e. when the app sets "index" and then the driver
2774			 * fills in the rest of the structure for the thing
2775			 * with that index.  We only need to copy up the first
2776			 * non-input field.
2777			 */
2778			if (v4l2_is_known_ioctl(cmd)) {
2779				u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2780				if (flags & INFO_FL_CLEAR_MASK)
2781					n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2782			}
2783
2784			if (copy_from_user(parg, (void __user *)arg, n))
2785				goto out;
2786
2787			/* zero out anything we don't copy from userspace */
2788			if (n < _IOC_SIZE(cmd))
2789				memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2790		} else {
2791			/* read-only ioctl */
2792			memset(parg, 0, _IOC_SIZE(cmd));
2793		}
2794	}
2795
2796	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2797	if (err < 0)
2798		goto out;
2799	has_array_args = err;
2800
2801	if (has_array_args) {
2802		/*
2803		 * When adding new types of array args, make sure that the
2804		 * parent argument to ioctl (which contains the pointer to the
2805		 * array) fits into sbuf (so that mbuf will still remain
2806		 * unused up to here).
2807		 */
2808		mbuf = kmalloc(array_size, GFP_KERNEL);
2809		err = -ENOMEM;
2810		if (NULL == mbuf)
2811			goto out_array_args;
2812		err = -EFAULT;
2813		if (copy_from_user(mbuf, user_ptr, array_size))
2814			goto out_array_args;
2815		*kernel_ptr = mbuf;
2816	}
2817
2818	/* Handles IOCTL */
2819	err = func(file, cmd, parg);
2820	if (err == -ENOIOCTLCMD)
2821		err = -ENOTTY;
2822	if (err == 0) {
2823		if (cmd == VIDIOC_DQBUF)
2824			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2825		else if (cmd == VIDIOC_QBUF)
2826			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2827	}
2828
2829	if (has_array_args) {
2830		*kernel_ptr = (void __force *)user_ptr;
2831		if (copy_to_user(user_ptr, mbuf, array_size))
2832			err = -EFAULT;
2833		goto out_array_args;
2834	}
2835	/* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2836	   results that must be returned. */
2837	if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2838		goto out;
2839
2840out_array_args:
2841	/*  Copy results into user buffer  */
2842	switch (_IOC_DIR(cmd)) {
2843	case _IOC_READ:
2844	case (_IOC_WRITE | _IOC_READ):
2845		if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2846			err = -EFAULT;
2847		break;
2848	}
2849
2850out:
2851	kfree(mbuf);
2852	return err;
2853}
2854EXPORT_SYMBOL(video_usercopy);
2855
2856long video_ioctl2(struct file *file,
2857	       unsigned int cmd, unsigned long arg)
2858{
2859	return video_usercopy(file, cmd, arg, __video_do_ioctl);
2860}
2861EXPORT_SYMBOL(video_ioctl2);