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-core.h>
30 
31 #define CREATE_TRACE_POINTS
32 #include <trace/events/v4l2.h>
33 
34 /* Zero out the end of the struct pointed to by p.  Everything after, but
35  * not including, the specified field is cleared. */
36 #define CLEAR_AFTER_FIELD(p, field) \
37 	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
38 	0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
39 
40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
41 
42 struct std_descr {
43 	v4l2_std_id std;
44 	const char *descr;
45 };
46 
47 static const struct std_descr standards[] = {
48 	{ V4L2_STD_NTSC, 	"NTSC"      },
49 	{ V4L2_STD_NTSC_M, 	"NTSC-M"    },
50 	{ V4L2_STD_NTSC_M_JP, 	"NTSC-M-JP" },
51 	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
52 	{ V4L2_STD_NTSC_443, 	"NTSC-443"  },
53 	{ V4L2_STD_PAL, 	"PAL"       },
54 	{ V4L2_STD_PAL_BG, 	"PAL-BG"    },
55 	{ V4L2_STD_PAL_B, 	"PAL-B"     },
56 	{ V4L2_STD_PAL_B1, 	"PAL-B1"    },
57 	{ V4L2_STD_PAL_G, 	"PAL-G"     },
58 	{ V4L2_STD_PAL_H, 	"PAL-H"     },
59 	{ V4L2_STD_PAL_I, 	"PAL-I"     },
60 	{ V4L2_STD_PAL_DK, 	"PAL-DK"    },
61 	{ V4L2_STD_PAL_D, 	"PAL-D"     },
62 	{ V4L2_STD_PAL_D1, 	"PAL-D1"    },
63 	{ V4L2_STD_PAL_K, 	"PAL-K"     },
64 	{ V4L2_STD_PAL_M, 	"PAL-M"     },
65 	{ V4L2_STD_PAL_N, 	"PAL-N"     },
66 	{ V4L2_STD_PAL_Nc, 	"PAL-Nc"    },
67 	{ V4L2_STD_PAL_60, 	"PAL-60"    },
68 	{ V4L2_STD_SECAM, 	"SECAM"     },
69 	{ V4L2_STD_SECAM_B, 	"SECAM-B"   },
70 	{ V4L2_STD_SECAM_G, 	"SECAM-G"   },
71 	{ V4L2_STD_SECAM_H, 	"SECAM-H"   },
72 	{ V4L2_STD_SECAM_DK, 	"SECAM-DK"  },
73 	{ V4L2_STD_SECAM_D, 	"SECAM-D"   },
74 	{ V4L2_STD_SECAM_K, 	"SECAM-K"   },
75 	{ V4L2_STD_SECAM_K1, 	"SECAM-K1"  },
76 	{ V4L2_STD_SECAM_L, 	"SECAM-L"   },
77 	{ V4L2_STD_SECAM_LC, 	"SECAM-Lc"  },
78 	{ 0, 			"Unknown"   }
79 };
80 
81 /* video4linux standard ID conversion to standard name
82  */
83 const char *v4l2_norm_to_name(v4l2_std_id id)
84 {
85 	u32 myid = id;
86 	int i;
87 
88 	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
89 	   64 bit comparations. So, on that architecture, with some gcc
90 	   variants, compilation fails. Currently, the max value is 30bit wide.
91 	 */
92 	BUG_ON(myid != id);
93 
94 	for (i = 0; standards[i].std; i++)
95 		if (myid == standards[i].std)
96 			break;
97 	return standards[i].descr;
98 }
99 EXPORT_SYMBOL(v4l2_norm_to_name);
100 
101 /* Returns frame period for the given standard */
102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
103 {
104 	if (id & V4L2_STD_525_60) {
105 		frameperiod->numerator = 1001;
106 		frameperiod->denominator = 30000;
107 	} else {
108 		frameperiod->numerator = 1;
109 		frameperiod->denominator = 25;
110 	}
111 }
112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
113 
114 /* Fill in the fields of a v4l2_standard structure according to the
115    'id' and 'transmission' parameters.  Returns negative on error.  */
116 int v4l2_video_std_construct(struct v4l2_standard *vs,
117 			     int id, const char *name)
118 {
119 	vs->id = id;
120 	v4l2_video_std_frame_period(id, &vs->frameperiod);
121 	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
122 	strlcpy(vs->name, name, sizeof(vs->name));
123 	return 0;
124 }
125 EXPORT_SYMBOL(v4l2_video_std_construct);
126 
127 /* ----------------------------------------------------------------- */
128 /* some arrays for pretty-printing debug messages of enum types      */
129 
130 const char *v4l2_field_names[] = {
131 	[V4L2_FIELD_ANY]        = "any",
132 	[V4L2_FIELD_NONE]       = "none",
133 	[V4L2_FIELD_TOP]        = "top",
134 	[V4L2_FIELD_BOTTOM]     = "bottom",
135 	[V4L2_FIELD_INTERLACED] = "interlaced",
136 	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
137 	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
138 	[V4L2_FIELD_ALTERNATE]  = "alternate",
139 	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
140 	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
141 };
142 EXPORT_SYMBOL(v4l2_field_names);
143 
144 const char *v4l2_type_names[] = {
145 	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
146 	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
147 	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
148 	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
149 	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
150 	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
151 	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
152 	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
153 	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
154 	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
155 	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
156 };
157 EXPORT_SYMBOL(v4l2_type_names);
158 
159 static const char *v4l2_memory_names[] = {
160 	[V4L2_MEMORY_MMAP]    = "mmap",
161 	[V4L2_MEMORY_USERPTR] = "userptr",
162 	[V4L2_MEMORY_OVERLAY] = "overlay",
163 	[V4L2_MEMORY_DMABUF] = "dmabuf",
164 };
165 
166 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
167 
168 /* ------------------------------------------------------------------ */
169 /* debug help functions                                               */
170 
171 static void v4l_print_querycap(const void *arg, bool write_only)
172 {
173 	const struct v4l2_capability *p = arg;
174 
175 	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
176 		"capabilities=0x%08x, device_caps=0x%08x\n",
177 		(int)sizeof(p->driver), p->driver,
178 		(int)sizeof(p->card), p->card,
179 		(int)sizeof(p->bus_info), p->bus_info,
180 		p->version, p->capabilities, p->device_caps);
181 }
182 
183 static void v4l_print_enuminput(const void *arg, bool write_only)
184 {
185 	const struct v4l2_input *p = arg;
186 
187 	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
188 		"std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
189 		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
190 		p->tuner, (unsigned long long)p->std, p->status,
191 		p->capabilities);
192 }
193 
194 static void v4l_print_enumoutput(const void *arg, bool write_only)
195 {
196 	const struct v4l2_output *p = arg;
197 
198 	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
199 		"modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
200 		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
201 		p->modulator, (unsigned long long)p->std, p->capabilities);
202 }
203 
204 static void v4l_print_audio(const void *arg, bool write_only)
205 {
206 	const struct v4l2_audio *p = arg;
207 
208 	if (write_only)
209 		pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
210 	else
211 		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
212 			p->index, (int)sizeof(p->name), p->name,
213 			p->capability, p->mode);
214 }
215 
216 static void v4l_print_audioout(const void *arg, bool write_only)
217 {
218 	const struct v4l2_audioout *p = arg;
219 
220 	if (write_only)
221 		pr_cont("index=%u\n", p->index);
222 	else
223 		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
224 			p->index, (int)sizeof(p->name), p->name,
225 			p->capability, p->mode);
226 }
227 
228 static void v4l_print_fmtdesc(const void *arg, bool write_only)
229 {
230 	const struct v4l2_fmtdesc *p = arg;
231 
232 	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
233 		p->index, prt_names(p->type, v4l2_type_names),
234 		p->flags, (p->pixelformat & 0xff),
235 		(p->pixelformat >>  8) & 0xff,
236 		(p->pixelformat >> 16) & 0xff,
237 		(p->pixelformat >> 24) & 0xff,
238 		(int)sizeof(p->description), p->description);
239 }
240 
241 static void v4l_print_format(const void *arg, bool write_only)
242 {
243 	const struct v4l2_format *p = arg;
244 	const struct v4l2_pix_format *pix;
245 	const struct v4l2_pix_format_mplane *mp;
246 	const struct v4l2_vbi_format *vbi;
247 	const struct v4l2_sliced_vbi_format *sliced;
248 	const struct v4l2_window *win;
249 	const struct v4l2_sdr_format *sdr;
250 	unsigned i;
251 
252 	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
253 	switch (p->type) {
254 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
255 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
256 		pix = &p->fmt.pix;
257 		pr_cont(", width=%u, height=%u, "
258 			"pixelformat=%c%c%c%c, field=%s, "
259 			"bytesperline=%u, sizeimage=%u, colorspace=%d\n",
260 			pix->width, pix->height,
261 			(pix->pixelformat & 0xff),
262 			(pix->pixelformat >>  8) & 0xff,
263 			(pix->pixelformat >> 16) & 0xff,
264 			(pix->pixelformat >> 24) & 0xff,
265 			prt_names(pix->field, v4l2_field_names),
266 			pix->bytesperline, pix->sizeimage,
267 			pix->colorspace);
268 		break;
269 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
270 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
271 		mp = &p->fmt.pix_mp;
272 		pr_cont(", width=%u, height=%u, "
273 			"format=%c%c%c%c, field=%s, "
274 			"colorspace=%d, num_planes=%u\n",
275 			mp->width, mp->height,
276 			(mp->pixelformat & 0xff),
277 			(mp->pixelformat >>  8) & 0xff,
278 			(mp->pixelformat >> 16) & 0xff,
279 			(mp->pixelformat >> 24) & 0xff,
280 			prt_names(mp->field, v4l2_field_names),
281 			mp->colorspace, mp->num_planes);
282 		for (i = 0; i < mp->num_planes; i++)
283 			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
284 					mp->plane_fmt[i].bytesperline,
285 					mp->plane_fmt[i].sizeimage);
286 		break;
287 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
288 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
289 		win = &p->fmt.win;
290 		/* Note: we can't print the clip list here since the clips
291 		 * pointer is a userspace pointer, not a kernelspace
292 		 * pointer. */
293 		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",
294 			win->w.width, win->w.height, win->w.left, win->w.top,
295 			prt_names(win->field, v4l2_field_names),
296 			win->chromakey, win->clipcount, win->clips,
297 			win->bitmap, win->global_alpha);
298 		break;
299 	case V4L2_BUF_TYPE_VBI_CAPTURE:
300 	case V4L2_BUF_TYPE_VBI_OUTPUT:
301 		vbi = &p->fmt.vbi;
302 		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
303 			"sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
304 			vbi->sampling_rate, vbi->offset,
305 			vbi->samples_per_line,
306 			(vbi->sample_format & 0xff),
307 			(vbi->sample_format >>  8) & 0xff,
308 			(vbi->sample_format >> 16) & 0xff,
309 			(vbi->sample_format >> 24) & 0xff,
310 			vbi->start[0], vbi->start[1],
311 			vbi->count[0], vbi->count[1]);
312 		break;
313 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
314 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
315 		sliced = &p->fmt.sliced;
316 		pr_cont(", service_set=0x%08x, io_size=%d\n",
317 				sliced->service_set, sliced->io_size);
318 		for (i = 0; i < 24; i++)
319 			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
320 				sliced->service_lines[0][i],
321 				sliced->service_lines[1][i]);
322 		break;
323 	case V4L2_BUF_TYPE_SDR_CAPTURE:
324 		sdr = &p->fmt.sdr;
325 		pr_cont(", pixelformat=%c%c%c%c\n",
326 			(sdr->pixelformat >>  0) & 0xff,
327 			(sdr->pixelformat >>  8) & 0xff,
328 			(sdr->pixelformat >> 16) & 0xff,
329 			(sdr->pixelformat >> 24) & 0xff);
330 		break;
331 	}
332 }
333 
334 static void v4l_print_framebuffer(const void *arg, bool write_only)
335 {
336 	const struct v4l2_framebuffer *p = arg;
337 
338 	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
339 		"height=%u, pixelformat=%c%c%c%c, "
340 		"bytesperline=%u, sizeimage=%u, colorspace=%d\n",
341 			p->capability, p->flags, p->base,
342 			p->fmt.width, p->fmt.height,
343 			(p->fmt.pixelformat & 0xff),
344 			(p->fmt.pixelformat >>  8) & 0xff,
345 			(p->fmt.pixelformat >> 16) & 0xff,
346 			(p->fmt.pixelformat >> 24) & 0xff,
347 			p->fmt.bytesperline, p->fmt.sizeimage,
348 			p->fmt.colorspace);
349 }
350 
351 static void v4l_print_buftype(const void *arg, bool write_only)
352 {
353 	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
354 }
355 
356 static void v4l_print_modulator(const void *arg, bool write_only)
357 {
358 	const struct v4l2_modulator *p = arg;
359 
360 	if (write_only)
361 		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
362 	else
363 		pr_cont("index=%u, name=%.*s, capability=0x%x, "
364 			"rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
365 			p->index, (int)sizeof(p->name), p->name, p->capability,
366 			p->rangelow, p->rangehigh, p->txsubchans);
367 }
368 
369 static void v4l_print_tuner(const void *arg, bool write_only)
370 {
371 	const struct v4l2_tuner *p = arg;
372 
373 	if (write_only)
374 		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
375 	else
376 		pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
377 			"rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
378 			"rxsubchans=0x%x, audmode=%u\n",
379 			p->index, (int)sizeof(p->name), p->name, p->type,
380 			p->capability, p->rangelow,
381 			p->rangehigh, p->signal, p->afc,
382 			p->rxsubchans, p->audmode);
383 }
384 
385 static void v4l_print_frequency(const void *arg, bool write_only)
386 {
387 	const struct v4l2_frequency *p = arg;
388 
389 	pr_cont("tuner=%u, type=%u, frequency=%u\n",
390 				p->tuner, p->type, p->frequency);
391 }
392 
393 static void v4l_print_standard(const void *arg, bool write_only)
394 {
395 	const struct v4l2_standard *p = arg;
396 
397 	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
398 		"framelines=%u\n", p->index,
399 		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
400 		p->frameperiod.numerator,
401 		p->frameperiod.denominator,
402 		p->framelines);
403 }
404 
405 static void v4l_print_std(const void *arg, bool write_only)
406 {
407 	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
408 }
409 
410 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
411 {
412 	const struct v4l2_hw_freq_seek *p = arg;
413 
414 	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
415 		"rangelow=%u, rangehigh=%u\n",
416 		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
417 		p->rangelow, p->rangehigh);
418 }
419 
420 static void v4l_print_requestbuffers(const void *arg, bool write_only)
421 {
422 	const struct v4l2_requestbuffers *p = arg;
423 
424 	pr_cont("count=%d, type=%s, memory=%s\n",
425 		p->count,
426 		prt_names(p->type, v4l2_type_names),
427 		prt_names(p->memory, v4l2_memory_names));
428 }
429 
430 static void v4l_print_buffer(const void *arg, bool write_only)
431 {
432 	const struct v4l2_buffer *p = arg;
433 	const struct v4l2_timecode *tc = &p->timecode;
434 	const struct v4l2_plane *plane;
435 	int i;
436 
437 	pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
438 		"flags=0x%08x, field=%s, sequence=%d, memory=%s",
439 			p->timestamp.tv_sec / 3600,
440 			(int)(p->timestamp.tv_sec / 60) % 60,
441 			(int)(p->timestamp.tv_sec % 60),
442 			(long)p->timestamp.tv_usec,
443 			p->index,
444 			prt_names(p->type, v4l2_type_names),
445 			p->flags, prt_names(p->field, v4l2_field_names),
446 			p->sequence, prt_names(p->memory, v4l2_memory_names));
447 
448 	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
449 		pr_cont("\n");
450 		for (i = 0; i < p->length; ++i) {
451 			plane = &p->m.planes[i];
452 			printk(KERN_DEBUG
453 				"plane %d: bytesused=%d, data_offset=0x%08x, "
454 				"offset/userptr=0x%lx, length=%d\n",
455 				i, plane->bytesused, plane->data_offset,
456 				plane->m.userptr, plane->length);
457 		}
458 	} else {
459 		pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
460 			p->bytesused, p->m.userptr, p->length);
461 	}
462 
463 	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
464 		"flags=0x%08x, frames=%d, userbits=0x%08x\n",
465 			tc->hours, tc->minutes, tc->seconds,
466 			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
467 }
468 
469 static void v4l_print_exportbuffer(const void *arg, bool write_only)
470 {
471 	const struct v4l2_exportbuffer *p = arg;
472 
473 	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
474 		p->fd, prt_names(p->type, v4l2_type_names),
475 		p->index, p->plane, p->flags);
476 }
477 
478 static void v4l_print_create_buffers(const void *arg, bool write_only)
479 {
480 	const struct v4l2_create_buffers *p = arg;
481 
482 	pr_cont("index=%d, count=%d, memory=%s, ",
483 			p->index, p->count,
484 			prt_names(p->memory, v4l2_memory_names));
485 	v4l_print_format(&p->format, write_only);
486 }
487 
488 static void v4l_print_streamparm(const void *arg, bool write_only)
489 {
490 	const struct v4l2_streamparm *p = arg;
491 
492 	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
493 
494 	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
495 	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
496 		const struct v4l2_captureparm *c = &p->parm.capture;
497 
498 		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
499 			"extendedmode=%d, readbuffers=%d\n",
500 			c->capability, c->capturemode,
501 			c->timeperframe.numerator, c->timeperframe.denominator,
502 			c->extendedmode, c->readbuffers);
503 	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
504 		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
505 		const struct v4l2_outputparm *c = &p->parm.output;
506 
507 		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
508 			"extendedmode=%d, writebuffers=%d\n",
509 			c->capability, c->outputmode,
510 			c->timeperframe.numerator, c->timeperframe.denominator,
511 			c->extendedmode, c->writebuffers);
512 	} else {
513 		pr_cont("\n");
514 	}
515 }
516 
517 static void v4l_print_queryctrl(const void *arg, bool write_only)
518 {
519 	const struct v4l2_queryctrl *p = arg;
520 
521 	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
522 		"step=%d, default=%d, flags=0x%08x\n",
523 			p->id, p->type, (int)sizeof(p->name), p->name,
524 			p->minimum, p->maximum,
525 			p->step, p->default_value, p->flags);
526 }
527 
528 static void v4l_print_querymenu(const void *arg, bool write_only)
529 {
530 	const struct v4l2_querymenu *p = arg;
531 
532 	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
533 }
534 
535 static void v4l_print_control(const void *arg, bool write_only)
536 {
537 	const struct v4l2_control *p = arg;
538 
539 	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
540 }
541 
542 static void v4l_print_ext_controls(const void *arg, bool write_only)
543 {
544 	const struct v4l2_ext_controls *p = arg;
545 	int i;
546 
547 	pr_cont("class=0x%x, count=%d, error_idx=%d",
548 			p->ctrl_class, p->count, p->error_idx);
549 	for (i = 0; i < p->count; i++) {
550 		if (p->controls[i].size)
551 			pr_cont(", id/val=0x%x/0x%x",
552 				p->controls[i].id, p->controls[i].value);
553 		else
554 			pr_cont(", id/size=0x%x/%u",
555 				p->controls[i].id, p->controls[i].size);
556 	}
557 	pr_cont("\n");
558 }
559 
560 static void v4l_print_cropcap(const void *arg, bool write_only)
561 {
562 	const struct v4l2_cropcap *p = arg;
563 
564 	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
565 		"defrect wxh=%dx%d, x,y=%d,%d, "
566 		"pixelaspect %d/%d\n",
567 		prt_names(p->type, v4l2_type_names),
568 		p->bounds.width, p->bounds.height,
569 		p->bounds.left, p->bounds.top,
570 		p->defrect.width, p->defrect.height,
571 		p->defrect.left, p->defrect.top,
572 		p->pixelaspect.numerator, p->pixelaspect.denominator);
573 }
574 
575 static void v4l_print_crop(const void *arg, bool write_only)
576 {
577 	const struct v4l2_crop *p = arg;
578 
579 	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
580 		prt_names(p->type, v4l2_type_names),
581 		p->c.width, p->c.height,
582 		p->c.left, p->c.top);
583 }
584 
585 static void v4l_print_selection(const void *arg, bool write_only)
586 {
587 	const struct v4l2_selection *p = arg;
588 
589 	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
590 		prt_names(p->type, v4l2_type_names),
591 		p->target, p->flags,
592 		p->r.width, p->r.height, p->r.left, p->r.top);
593 }
594 
595 static void v4l_print_jpegcompression(const void *arg, bool write_only)
596 {
597 	const struct v4l2_jpegcompression *p = arg;
598 
599 	pr_cont("quality=%d, APPn=%d, APP_len=%d, "
600 		"COM_len=%d, jpeg_markers=0x%x\n",
601 		p->quality, p->APPn, p->APP_len,
602 		p->COM_len, p->jpeg_markers);
603 }
604 
605 static void v4l_print_enc_idx(const void *arg, bool write_only)
606 {
607 	const struct v4l2_enc_idx *p = arg;
608 
609 	pr_cont("entries=%d, entries_cap=%d\n",
610 			p->entries, p->entries_cap);
611 }
612 
613 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
614 {
615 	const struct v4l2_encoder_cmd *p = arg;
616 
617 	pr_cont("cmd=%d, flags=0x%x\n",
618 			p->cmd, p->flags);
619 }
620 
621 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
622 {
623 	const struct v4l2_decoder_cmd *p = arg;
624 
625 	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
626 
627 	if (p->cmd == V4L2_DEC_CMD_START)
628 		pr_info("speed=%d, format=%u\n",
629 				p->start.speed, p->start.format);
630 	else if (p->cmd == V4L2_DEC_CMD_STOP)
631 		pr_info("pts=%llu\n", p->stop.pts);
632 }
633 
634 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
635 {
636 	const struct v4l2_dbg_chip_info *p = arg;
637 
638 	pr_cont("type=%u, ", p->match.type);
639 	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
640 		pr_cont("name=%.*s, ",
641 				(int)sizeof(p->match.name), p->match.name);
642 	else
643 		pr_cont("addr=%u, ", p->match.addr);
644 	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
645 }
646 
647 static void v4l_print_dbg_register(const void *arg, bool write_only)
648 {
649 	const struct v4l2_dbg_register *p = arg;
650 
651 	pr_cont("type=%u, ", p->match.type);
652 	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
653 		pr_cont("name=%.*s, ",
654 				(int)sizeof(p->match.name), p->match.name);
655 	else
656 		pr_cont("addr=%u, ", p->match.addr);
657 	pr_cont("reg=0x%llx, val=0x%llx\n",
658 			p->reg, p->val);
659 }
660 
661 static void v4l_print_dv_timings(const void *arg, bool write_only)
662 {
663 	const struct v4l2_dv_timings *p = arg;
664 
665 	switch (p->type) {
666 	case V4L2_DV_BT_656_1120:
667 		pr_cont("type=bt-656/1120, interlaced=%u, "
668 			"pixelclock=%llu, "
669 			"width=%u, height=%u, polarities=0x%x, "
670 			"hfrontporch=%u, hsync=%u, "
671 			"hbackporch=%u, vfrontporch=%u, "
672 			"vsync=%u, vbackporch=%u, "
673 			"il_vfrontporch=%u, il_vsync=%u, "
674 			"il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
675 				p->bt.interlaced, p->bt.pixelclock,
676 				p->bt.width, p->bt.height,
677 				p->bt.polarities, p->bt.hfrontporch,
678 				p->bt.hsync, p->bt.hbackporch,
679 				p->bt.vfrontporch, p->bt.vsync,
680 				p->bt.vbackporch, p->bt.il_vfrontporch,
681 				p->bt.il_vsync, p->bt.il_vbackporch,
682 				p->bt.standards, p->bt.flags);
683 		break;
684 	default:
685 		pr_cont("type=%d\n", p->type);
686 		break;
687 	}
688 }
689 
690 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
691 {
692 	const struct v4l2_enum_dv_timings *p = arg;
693 
694 	pr_cont("index=%u, ", p->index);
695 	v4l_print_dv_timings(&p->timings, write_only);
696 }
697 
698 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
699 {
700 	const struct v4l2_dv_timings_cap *p = arg;
701 
702 	switch (p->type) {
703 	case V4L2_DV_BT_656_1120:
704 		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
705 			"pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
706 			p->bt.min_width, p->bt.max_width,
707 			p->bt.min_height, p->bt.max_height,
708 			p->bt.min_pixelclock, p->bt.max_pixelclock,
709 			p->bt.standards, p->bt.capabilities);
710 		break;
711 	default:
712 		pr_cont("type=%u\n", p->type);
713 		break;
714 	}
715 }
716 
717 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
718 {
719 	const struct v4l2_frmsizeenum *p = arg;
720 
721 	pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
722 			p->index,
723 			(p->pixel_format & 0xff),
724 			(p->pixel_format >>  8) & 0xff,
725 			(p->pixel_format >> 16) & 0xff,
726 			(p->pixel_format >> 24) & 0xff,
727 			p->type);
728 	switch (p->type) {
729 	case V4L2_FRMSIZE_TYPE_DISCRETE:
730 		pr_cont(", wxh=%ux%u\n",
731 			p->discrete.width, p->discrete.height);
732 		break;
733 	case V4L2_FRMSIZE_TYPE_STEPWISE:
734 		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
735 				p->stepwise.min_width,  p->stepwise.min_height,
736 				p->stepwise.step_width, p->stepwise.step_height,
737 				p->stepwise.max_width,  p->stepwise.max_height);
738 		break;
739 	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
740 		/* fall through */
741 	default:
742 		pr_cont("\n");
743 		break;
744 	}
745 }
746 
747 static void v4l_print_frmivalenum(const void *arg, bool write_only)
748 {
749 	const struct v4l2_frmivalenum *p = arg;
750 
751 	pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
752 			p->index,
753 			(p->pixel_format & 0xff),
754 			(p->pixel_format >>  8) & 0xff,
755 			(p->pixel_format >> 16) & 0xff,
756 			(p->pixel_format >> 24) & 0xff,
757 			p->width, p->height, p->type);
758 	switch (p->type) {
759 	case V4L2_FRMIVAL_TYPE_DISCRETE:
760 		pr_cont(", fps=%d/%d\n",
761 				p->discrete.numerator,
762 				p->discrete.denominator);
763 		break;
764 	case V4L2_FRMIVAL_TYPE_STEPWISE:
765 		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
766 				p->stepwise.min.numerator,
767 				p->stepwise.min.denominator,
768 				p->stepwise.max.numerator,
769 				p->stepwise.max.denominator,
770 				p->stepwise.step.numerator,
771 				p->stepwise.step.denominator);
772 		break;
773 	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
774 		/* fall through */
775 	default:
776 		pr_cont("\n");
777 		break;
778 	}
779 }
780 
781 static void v4l_print_event(const void *arg, bool write_only)
782 {
783 	const struct v4l2_event *p = arg;
784 	const struct v4l2_event_ctrl *c;
785 
786 	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
787 		"timestamp=%lu.%9.9lu\n",
788 			p->type, p->pending, p->sequence, p->id,
789 			p->timestamp.tv_sec, p->timestamp.tv_nsec);
790 	switch (p->type) {
791 	case V4L2_EVENT_VSYNC:
792 		printk(KERN_DEBUG "field=%s\n",
793 			prt_names(p->u.vsync.field, v4l2_field_names));
794 		break;
795 	case V4L2_EVENT_CTRL:
796 		c = &p->u.ctrl;
797 		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
798 			c->changes, c->type);
799 		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
800 			pr_cont("value64=%lld, ", c->value64);
801 		else
802 			pr_cont("value=%d, ", c->value);
803 		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
804 			"default_value=%d\n",
805 			c->flags, c->minimum, c->maximum,
806 			c->step, c->default_value);
807 		break;
808 	case V4L2_EVENT_FRAME_SYNC:
809 		pr_cont("frame_sequence=%u\n",
810 			p->u.frame_sync.frame_sequence);
811 		break;
812 	}
813 }
814 
815 static void v4l_print_event_subscription(const void *arg, bool write_only)
816 {
817 	const struct v4l2_event_subscription *p = arg;
818 
819 	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
820 			p->type, p->id, p->flags);
821 }
822 
823 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
824 {
825 	const struct v4l2_sliced_vbi_cap *p = arg;
826 	int i;
827 
828 	pr_cont("type=%s, service_set=0x%08x\n",
829 			prt_names(p->type, v4l2_type_names), p->service_set);
830 	for (i = 0; i < 24; i++)
831 		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
832 				p->service_lines[0][i],
833 				p->service_lines[1][i]);
834 }
835 
836 static void v4l_print_freq_band(const void *arg, bool write_only)
837 {
838 	const struct v4l2_frequency_band *p = arg;
839 
840 	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
841 		"rangelow=%u, rangehigh=%u, modulation=0x%x\n",
842 			p->tuner, p->type, p->index,
843 			p->capability, p->rangelow,
844 			p->rangehigh, p->modulation);
845 }
846 
847 static void v4l_print_edid(const void *arg, bool write_only)
848 {
849 	const struct v4l2_edid *p = arg;
850 
851 	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
852 		p->pad, p->start_block, p->blocks);
853 }
854 
855 static void v4l_print_u32(const void *arg, bool write_only)
856 {
857 	pr_cont("value=%u\n", *(const u32 *)arg);
858 }
859 
860 static void v4l_print_newline(const void *arg, bool write_only)
861 {
862 	pr_cont("\n");
863 }
864 
865 static void v4l_print_default(const void *arg, bool write_only)
866 {
867 	pr_cont("driver-specific ioctl\n");
868 }
869 
870 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
871 {
872 	__u32 i;
873 
874 	/* zero the reserved fields */
875 	c->reserved[0] = c->reserved[1] = 0;
876 	for (i = 0; i < c->count; i++)
877 		c->controls[i].reserved2[0] = 0;
878 
879 	/* V4L2_CID_PRIVATE_BASE cannot be used as control class
880 	   when using extended controls.
881 	   Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
882 	   is it allowed for backwards compatibility.
883 	 */
884 	if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
885 		return 0;
886 	/* Check that all controls are from the same control class. */
887 	for (i = 0; i < c->count; i++) {
888 		if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
889 			c->error_idx = i;
890 			return 0;
891 		}
892 	}
893 	return 1;
894 }
895 
896 static int check_fmt(struct file *file, enum v4l2_buf_type type)
897 {
898 	struct video_device *vfd = video_devdata(file);
899 	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
900 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
901 	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
902 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
903 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
904 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
905 
906 	if (ops == NULL)
907 		return -EINVAL;
908 
909 	switch (type) {
910 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
911 		if (is_vid && is_rx &&
912 		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
913 			return 0;
914 		break;
915 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
916 		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
917 			return 0;
918 		break;
919 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
920 		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
921 			return 0;
922 		break;
923 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
924 		if (is_vid && is_tx &&
925 		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
926 			return 0;
927 		break;
928 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
929 		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
930 			return 0;
931 		break;
932 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
933 		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
934 			return 0;
935 		break;
936 	case V4L2_BUF_TYPE_VBI_CAPTURE:
937 		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
938 			return 0;
939 		break;
940 	case V4L2_BUF_TYPE_VBI_OUTPUT:
941 		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
942 			return 0;
943 		break;
944 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
945 		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
946 			return 0;
947 		break;
948 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
949 		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
950 			return 0;
951 		break;
952 	case V4L2_BUF_TYPE_SDR_CAPTURE:
953 		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
954 			return 0;
955 		break;
956 	default:
957 		break;
958 	}
959 	return -EINVAL;
960 }
961 
962 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
963 				struct file *file, void *fh, void *arg)
964 {
965 	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
966 
967 	cap->version = LINUX_VERSION_CODE;
968 	return ops->vidioc_querycap(file, fh, cap);
969 }
970 
971 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
972 				struct file *file, void *fh, void *arg)
973 {
974 	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
975 }
976 
977 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
978 				struct file *file, void *fh, void *arg)
979 {
980 	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
981 }
982 
983 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
984 				struct file *file, void *fh, void *arg)
985 {
986 	struct video_device *vfd;
987 	u32 *p = arg;
988 
989 	if (ops->vidioc_g_priority)
990 		return ops->vidioc_g_priority(file, fh, arg);
991 	vfd = video_devdata(file);
992 	*p = v4l2_prio_max(&vfd->v4l2_dev->prio);
993 	return 0;
994 }
995 
996 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
997 				struct file *file, void *fh, void *arg)
998 {
999 	struct video_device *vfd;
1000 	struct v4l2_fh *vfh;
1001 	u32 *p = arg;
1002 
1003 	if (ops->vidioc_s_priority)
1004 		return ops->vidioc_s_priority(file, fh, *p);
1005 	vfd = video_devdata(file);
1006 	vfh = file->private_data;
1007 	return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1008 }
1009 
1010 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1011 				struct file *file, void *fh, void *arg)
1012 {
1013 	struct video_device *vfd = video_devdata(file);
1014 	struct v4l2_input *p = arg;
1015 
1016 	/*
1017 	 * We set the flags for CAP_DV_TIMINGS &
1018 	 * CAP_STD here based on ioctl handler provided by the
1019 	 * driver. If the driver doesn't support these
1020 	 * for a specific input, it must override these flags.
1021 	 */
1022 	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1023 		p->capabilities |= V4L2_IN_CAP_STD;
1024 
1025 	return ops->vidioc_enum_input(file, fh, p);
1026 }
1027 
1028 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1029 				struct file *file, void *fh, void *arg)
1030 {
1031 	struct video_device *vfd = video_devdata(file);
1032 	struct v4l2_output *p = arg;
1033 
1034 	/*
1035 	 * We set the flags for CAP_DV_TIMINGS &
1036 	 * CAP_STD here based on ioctl handler provided by the
1037 	 * driver. If the driver doesn't support these
1038 	 * for a specific output, it must override these flags.
1039 	 */
1040 	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1041 		p->capabilities |= V4L2_OUT_CAP_STD;
1042 
1043 	return ops->vidioc_enum_output(file, fh, p);
1044 }
1045 
1046 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1047 				struct file *file, void *fh, void *arg)
1048 {
1049 	struct v4l2_fmtdesc *p = arg;
1050 	struct video_device *vfd = video_devdata(file);
1051 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1052 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1053 
1054 	switch (p->type) {
1055 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1056 		if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1057 			break;
1058 		return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1059 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1060 		if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1061 			break;
1062 		return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1063 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1064 		if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1065 			break;
1066 		return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1067 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1068 		if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1069 			break;
1070 		return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1071 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1072 		if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1073 			break;
1074 		return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1075 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1076 		if (unlikely(!is_rx || !ops->vidioc_enum_fmt_sdr_cap))
1077 			break;
1078 		return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1079 	}
1080 	return -EINVAL;
1081 }
1082 
1083 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1084 				struct file *file, void *fh, void *arg)
1085 {
1086 	struct v4l2_format *p = arg;
1087 	struct video_device *vfd = video_devdata(file);
1088 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1089 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1090 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1091 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1092 
1093 	switch (p->type) {
1094 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1095 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1096 			break;
1097 		return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1098 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1099 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1100 			break;
1101 		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1102 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1103 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1104 			break;
1105 		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1106 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1107 		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1108 			break;
1109 		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1110 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1111 		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1112 			break;
1113 		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1114 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1115 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1116 			break;
1117 		return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1118 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1119 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1120 			break;
1121 		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1122 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1123 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1124 			break;
1125 		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1126 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1127 		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1128 			break;
1129 		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1130 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1131 		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1132 			break;
1133 		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1134 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1135 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1136 			break;
1137 		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1138 	}
1139 	return -EINVAL;
1140 }
1141 
1142 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1143 				struct file *file, void *fh, void *arg)
1144 {
1145 	struct v4l2_format *p = arg;
1146 	struct video_device *vfd = video_devdata(file);
1147 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1148 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1149 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1150 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1151 
1152 	switch (p->type) {
1153 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1154 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1155 			break;
1156 		CLEAR_AFTER_FIELD(p, fmt.pix);
1157 		return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1158 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1159 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1160 			break;
1161 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1162 		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1163 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1164 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1165 			break;
1166 		CLEAR_AFTER_FIELD(p, fmt.win);
1167 		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1168 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1169 		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1170 			break;
1171 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1172 		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1173 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1174 		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1175 			break;
1176 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1177 		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1178 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1179 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1180 			break;
1181 		CLEAR_AFTER_FIELD(p, fmt.pix);
1182 		return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1183 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1184 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1185 			break;
1186 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1187 		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1188 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1189 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1190 			break;
1191 		CLEAR_AFTER_FIELD(p, fmt.win);
1192 		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1193 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1194 		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1195 			break;
1196 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1197 		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1198 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1199 		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1200 			break;
1201 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1202 		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1203 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1204 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1205 			break;
1206 		CLEAR_AFTER_FIELD(p, fmt.sdr);
1207 		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1208 	}
1209 	return -EINVAL;
1210 }
1211 
1212 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1213 				struct file *file, void *fh, void *arg)
1214 {
1215 	struct v4l2_format *p = arg;
1216 	struct video_device *vfd = video_devdata(file);
1217 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1218 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1219 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1220 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1221 
1222 	switch (p->type) {
1223 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1224 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1225 			break;
1226 		CLEAR_AFTER_FIELD(p, fmt.pix);
1227 		return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1228 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1229 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1230 			break;
1231 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1232 		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1233 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1234 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1235 			break;
1236 		CLEAR_AFTER_FIELD(p, fmt.win);
1237 		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1238 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1239 		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1240 			break;
1241 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1242 		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1243 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1244 		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1245 			break;
1246 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1247 		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1248 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1249 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1250 			break;
1251 		CLEAR_AFTER_FIELD(p, fmt.pix);
1252 		return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1253 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1254 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1255 			break;
1256 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1257 		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1258 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1259 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1260 			break;
1261 		CLEAR_AFTER_FIELD(p, fmt.win);
1262 		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1263 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1264 		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1265 			break;
1266 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1267 		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1268 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1269 		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1270 			break;
1271 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1272 		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1273 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1274 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1275 			break;
1276 		CLEAR_AFTER_FIELD(p, fmt.sdr);
1277 		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1278 	}
1279 	return -EINVAL;
1280 }
1281 
1282 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1283 				struct file *file, void *fh, void *arg)
1284 {
1285 	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1286 }
1287 
1288 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1289 				struct file *file, void *fh, void *arg)
1290 {
1291 	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1292 }
1293 
1294 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1295 				struct file *file, void *fh, void *arg)
1296 {
1297 	struct video_device *vfd = video_devdata(file);
1298 	struct v4l2_tuner *p = arg;
1299 	int err;
1300 
1301 	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1302 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1303 	err = ops->vidioc_g_tuner(file, fh, p);
1304 	if (!err)
1305 		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1306 	return err;
1307 }
1308 
1309 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1310 				struct file *file, void *fh, void *arg)
1311 {
1312 	struct video_device *vfd = video_devdata(file);
1313 	struct v4l2_tuner *p = arg;
1314 
1315 	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1316 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1317 	return ops->vidioc_s_tuner(file, fh, p);
1318 }
1319 
1320 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1321 				struct file *file, void *fh, void *arg)
1322 {
1323 	struct v4l2_modulator *p = arg;
1324 	int err;
1325 
1326 	err = ops->vidioc_g_modulator(file, fh, p);
1327 	if (!err)
1328 		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1329 	return err;
1330 }
1331 
1332 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1333 				struct file *file, void *fh, void *arg)
1334 {
1335 	struct video_device *vfd = video_devdata(file);
1336 	struct v4l2_frequency *p = arg;
1337 
1338 	if (vfd->vfl_type == VFL_TYPE_SDR)
1339 		p->type = V4L2_TUNER_ADC;
1340 	else
1341 		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1342 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1343 	return ops->vidioc_g_frequency(file, fh, p);
1344 }
1345 
1346 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1347 				struct file *file, void *fh, void *arg)
1348 {
1349 	struct video_device *vfd = video_devdata(file);
1350 	const struct v4l2_frequency *p = arg;
1351 	enum v4l2_tuner_type type;
1352 
1353 	if (vfd->vfl_type == VFL_TYPE_SDR) {
1354 		if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1355 			return -EINVAL;
1356 	} else {
1357 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1358 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1359 		if (type != p->type)
1360 			return -EINVAL;
1361 	}
1362 	return ops->vidioc_s_frequency(file, fh, p);
1363 }
1364 
1365 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1366 				struct file *file, void *fh, void *arg)
1367 {
1368 	struct video_device *vfd = video_devdata(file);
1369 	struct v4l2_standard *p = arg;
1370 	v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1371 	unsigned int index = p->index, i, j = 0;
1372 	const char *descr = "";
1373 
1374 	/* Return -ENODATA if the tvnorms for the current input
1375 	   or output is 0, meaning that it doesn't support this API. */
1376 	if (id == 0)
1377 		return -ENODATA;
1378 
1379 	/* Return norm array in a canonical way */
1380 	for (i = 0; i <= index && id; i++) {
1381 		/* last std value in the standards array is 0, so this
1382 		   while always ends there since (id & 0) == 0. */
1383 		while ((id & standards[j].std) != standards[j].std)
1384 			j++;
1385 		curr_id = standards[j].std;
1386 		descr = standards[j].descr;
1387 		j++;
1388 		if (curr_id == 0)
1389 			break;
1390 		if (curr_id != V4L2_STD_PAL &&
1391 				curr_id != V4L2_STD_SECAM &&
1392 				curr_id != V4L2_STD_NTSC)
1393 			id &= ~curr_id;
1394 	}
1395 	if (i <= index)
1396 		return -EINVAL;
1397 
1398 	v4l2_video_std_construct(p, curr_id, descr);
1399 	return 0;
1400 }
1401 
1402 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1403 				struct file *file, void *fh, void *arg)
1404 {
1405 	struct video_device *vfd = video_devdata(file);
1406 	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1407 
1408 	norm = id & vfd->tvnorms;
1409 	if (vfd->tvnorms && !norm)	/* Check if std is supported */
1410 		return -EINVAL;
1411 
1412 	/* Calls the specific handler */
1413 	return ops->vidioc_s_std(file, fh, norm);
1414 }
1415 
1416 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1417 				struct file *file, void *fh, void *arg)
1418 {
1419 	struct video_device *vfd = video_devdata(file);
1420 	v4l2_std_id *p = arg;
1421 
1422 	/*
1423 	 * If no signal is detected, then the driver should return
1424 	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1425 	 * any standards that do not apply removed.
1426 	 *
1427 	 * This means that tuners, audio and video decoders can join
1428 	 * their efforts to improve the standards detection.
1429 	 */
1430 	*p = vfd->tvnorms;
1431 	return ops->vidioc_querystd(file, fh, arg);
1432 }
1433 
1434 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1435 				struct file *file, void *fh, void *arg)
1436 {
1437 	struct video_device *vfd = video_devdata(file);
1438 	struct v4l2_hw_freq_seek *p = arg;
1439 	enum v4l2_tuner_type type;
1440 
1441 	/* s_hw_freq_seek is not supported for SDR for now */
1442 	if (vfd->vfl_type == VFL_TYPE_SDR)
1443 		return -EINVAL;
1444 
1445 	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1446 		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1447 	if (p->type != type)
1448 		return -EINVAL;
1449 	return ops->vidioc_s_hw_freq_seek(file, fh, p);
1450 }
1451 
1452 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1453 				struct file *file, void *fh, void *arg)
1454 {
1455 	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1456 }
1457 
1458 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1459 				struct file *file, void *fh, void *arg)
1460 {
1461 	struct v4l2_requestbuffers *p = arg;
1462 	int ret = check_fmt(file, p->type);
1463 
1464 	if (ret)
1465 		return ret;
1466 
1467 	CLEAR_AFTER_FIELD(p, memory);
1468 
1469 	return ops->vidioc_reqbufs(file, fh, p);
1470 }
1471 
1472 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1473 				struct file *file, void *fh, void *arg)
1474 {
1475 	struct v4l2_buffer *p = arg;
1476 	int ret = check_fmt(file, p->type);
1477 
1478 	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1479 }
1480 
1481 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1482 				struct file *file, void *fh, void *arg)
1483 {
1484 	struct v4l2_buffer *p = arg;
1485 	int ret = check_fmt(file, p->type);
1486 
1487 	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1488 }
1489 
1490 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1491 				struct file *file, void *fh, void *arg)
1492 {
1493 	struct v4l2_buffer *p = arg;
1494 	int ret = check_fmt(file, p->type);
1495 
1496 	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1497 }
1498 
1499 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1500 				struct file *file, void *fh, void *arg)
1501 {
1502 	struct v4l2_create_buffers *create = arg;
1503 	int ret = check_fmt(file, create->format.type);
1504 
1505 	return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1506 }
1507 
1508 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1509 				struct file *file, void *fh, void *arg)
1510 {
1511 	struct v4l2_buffer *b = arg;
1512 	int ret = check_fmt(file, b->type);
1513 
1514 	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1515 }
1516 
1517 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1518 				struct file *file, void *fh, void *arg)
1519 {
1520 	struct v4l2_streamparm *p = arg;
1521 	v4l2_std_id std;
1522 	int ret = check_fmt(file, p->type);
1523 
1524 	if (ret)
1525 		return ret;
1526 	if (ops->vidioc_g_parm)
1527 		return ops->vidioc_g_parm(file, fh, p);
1528 	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1529 	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1530 		return -EINVAL;
1531 	p->parm.capture.readbuffers = 2;
1532 	ret = ops->vidioc_g_std(file, fh, &std);
1533 	if (ret == 0)
1534 		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1535 	return ret;
1536 }
1537 
1538 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1539 				struct file *file, void *fh, void *arg)
1540 {
1541 	struct v4l2_streamparm *p = arg;
1542 	int ret = check_fmt(file, p->type);
1543 
1544 	return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1545 }
1546 
1547 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1548 				struct file *file, void *fh, void *arg)
1549 {
1550 	struct video_device *vfd = video_devdata(file);
1551 	struct v4l2_queryctrl *p = arg;
1552 	struct v4l2_fh *vfh =
1553 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1554 
1555 	if (vfh && vfh->ctrl_handler)
1556 		return v4l2_queryctrl(vfh->ctrl_handler, p);
1557 	if (vfd->ctrl_handler)
1558 		return v4l2_queryctrl(vfd->ctrl_handler, p);
1559 	if (ops->vidioc_queryctrl)
1560 		return ops->vidioc_queryctrl(file, fh, p);
1561 	return -ENOTTY;
1562 }
1563 
1564 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1565 				struct file *file, void *fh, void *arg)
1566 {
1567 	struct video_device *vfd = video_devdata(file);
1568 	struct v4l2_querymenu *p = arg;
1569 	struct v4l2_fh *vfh =
1570 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1571 
1572 	if (vfh && vfh->ctrl_handler)
1573 		return v4l2_querymenu(vfh->ctrl_handler, p);
1574 	if (vfd->ctrl_handler)
1575 		return v4l2_querymenu(vfd->ctrl_handler, p);
1576 	if (ops->vidioc_querymenu)
1577 		return ops->vidioc_querymenu(file, fh, p);
1578 	return -ENOTTY;
1579 }
1580 
1581 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1582 				struct file *file, void *fh, void *arg)
1583 {
1584 	struct video_device *vfd = video_devdata(file);
1585 	struct v4l2_control *p = arg;
1586 	struct v4l2_fh *vfh =
1587 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1588 	struct v4l2_ext_controls ctrls;
1589 	struct v4l2_ext_control ctrl;
1590 
1591 	if (vfh && vfh->ctrl_handler)
1592 		return v4l2_g_ctrl(vfh->ctrl_handler, p);
1593 	if (vfd->ctrl_handler)
1594 		return v4l2_g_ctrl(vfd->ctrl_handler, p);
1595 	if (ops->vidioc_g_ctrl)
1596 		return ops->vidioc_g_ctrl(file, fh, p);
1597 	if (ops->vidioc_g_ext_ctrls == NULL)
1598 		return -ENOTTY;
1599 
1600 	ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1601 	ctrls.count = 1;
1602 	ctrls.controls = &ctrl;
1603 	ctrl.id = p->id;
1604 	ctrl.value = p->value;
1605 	if (check_ext_ctrls(&ctrls, 1)) {
1606 		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1607 
1608 		if (ret == 0)
1609 			p->value = ctrl.value;
1610 		return ret;
1611 	}
1612 	return -EINVAL;
1613 }
1614 
1615 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1616 				struct file *file, void *fh, void *arg)
1617 {
1618 	struct video_device *vfd = video_devdata(file);
1619 	struct v4l2_control *p = arg;
1620 	struct v4l2_fh *vfh =
1621 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1622 	struct v4l2_ext_controls ctrls;
1623 	struct v4l2_ext_control ctrl;
1624 
1625 	if (vfh && vfh->ctrl_handler)
1626 		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1627 	if (vfd->ctrl_handler)
1628 		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1629 	if (ops->vidioc_s_ctrl)
1630 		return ops->vidioc_s_ctrl(file, fh, p);
1631 	if (ops->vidioc_s_ext_ctrls == NULL)
1632 		return -ENOTTY;
1633 
1634 	ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1635 	ctrls.count = 1;
1636 	ctrls.controls = &ctrl;
1637 	ctrl.id = p->id;
1638 	ctrl.value = p->value;
1639 	if (check_ext_ctrls(&ctrls, 1))
1640 		return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1641 	return -EINVAL;
1642 }
1643 
1644 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1645 				struct file *file, void *fh, void *arg)
1646 {
1647 	struct video_device *vfd = video_devdata(file);
1648 	struct v4l2_ext_controls *p = arg;
1649 	struct v4l2_fh *vfh =
1650 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1651 
1652 	p->error_idx = p->count;
1653 	if (vfh && vfh->ctrl_handler)
1654 		return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1655 	if (vfd->ctrl_handler)
1656 		return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1657 	if (ops->vidioc_g_ext_ctrls == NULL)
1658 		return -ENOTTY;
1659 	return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1660 					-EINVAL;
1661 }
1662 
1663 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1664 				struct file *file, void *fh, void *arg)
1665 {
1666 	struct video_device *vfd = video_devdata(file);
1667 	struct v4l2_ext_controls *p = arg;
1668 	struct v4l2_fh *vfh =
1669 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1670 
1671 	p->error_idx = p->count;
1672 	if (vfh && vfh->ctrl_handler)
1673 		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1674 	if (vfd->ctrl_handler)
1675 		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1676 	if (ops->vidioc_s_ext_ctrls == NULL)
1677 		return -ENOTTY;
1678 	return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1679 					-EINVAL;
1680 }
1681 
1682 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1683 				struct file *file, void *fh, void *arg)
1684 {
1685 	struct video_device *vfd = video_devdata(file);
1686 	struct v4l2_ext_controls *p = arg;
1687 	struct v4l2_fh *vfh =
1688 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1689 
1690 	p->error_idx = p->count;
1691 	if (vfh && vfh->ctrl_handler)
1692 		return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1693 	if (vfd->ctrl_handler)
1694 		return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1695 	if (ops->vidioc_try_ext_ctrls == NULL)
1696 		return -ENOTTY;
1697 	return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1698 					-EINVAL;
1699 }
1700 
1701 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1702 				struct file *file, void *fh, void *arg)
1703 {
1704 	struct v4l2_crop *p = arg;
1705 	struct v4l2_selection s = {
1706 		.type = p->type,
1707 	};
1708 	int ret;
1709 
1710 	if (ops->vidioc_g_crop)
1711 		return ops->vidioc_g_crop(file, fh, p);
1712 	/* simulate capture crop using selection api */
1713 
1714 	/* crop means compose for output devices */
1715 	if (V4L2_TYPE_IS_OUTPUT(p->type))
1716 		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1717 	else
1718 		s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1719 
1720 	ret = ops->vidioc_g_selection(file, fh, &s);
1721 
1722 	/* copying results to old structure on success */
1723 	if (!ret)
1724 		p->c = s.r;
1725 	return ret;
1726 }
1727 
1728 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1729 				struct file *file, void *fh, void *arg)
1730 {
1731 	struct v4l2_crop *p = arg;
1732 	struct v4l2_selection s = {
1733 		.type = p->type,
1734 		.r = p->c,
1735 	};
1736 
1737 	if (ops->vidioc_s_crop)
1738 		return ops->vidioc_s_crop(file, fh, p);
1739 	/* simulate capture crop using selection api */
1740 
1741 	/* crop means compose for output devices */
1742 	if (V4L2_TYPE_IS_OUTPUT(p->type))
1743 		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1744 	else
1745 		s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1746 
1747 	return ops->vidioc_s_selection(file, fh, &s);
1748 }
1749 
1750 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1751 				struct file *file, void *fh, void *arg)
1752 {
1753 	struct v4l2_cropcap *p = arg;
1754 	struct v4l2_selection s = { .type = p->type };
1755 	int ret;
1756 
1757 	if (ops->vidioc_cropcap)
1758 		return ops->vidioc_cropcap(file, fh, p);
1759 
1760 	/* obtaining bounds */
1761 	if (V4L2_TYPE_IS_OUTPUT(p->type))
1762 		s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1763 	else
1764 		s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1765 
1766 	ret = ops->vidioc_g_selection(file, fh, &s);
1767 	if (ret)
1768 		return ret;
1769 	p->bounds = s.r;
1770 
1771 	/* obtaining defrect */
1772 	if (V4L2_TYPE_IS_OUTPUT(p->type))
1773 		s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1774 	else
1775 		s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1776 
1777 	ret = ops->vidioc_g_selection(file, fh, &s);
1778 	if (ret)
1779 		return ret;
1780 	p->defrect = s.r;
1781 
1782 	/* setting trivial pixelaspect */
1783 	p->pixelaspect.numerator = 1;
1784 	p->pixelaspect.denominator = 1;
1785 	return 0;
1786 }
1787 
1788 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1789 				struct file *file, void *fh, void *arg)
1790 {
1791 	struct video_device *vfd = video_devdata(file);
1792 	int ret;
1793 
1794 	if (vfd->v4l2_dev)
1795 		pr_info("%s: =================  START STATUS  =================\n",
1796 			vfd->v4l2_dev->name);
1797 	ret = ops->vidioc_log_status(file, fh);
1798 	if (vfd->v4l2_dev)
1799 		pr_info("%s: ==================  END STATUS  ==================\n",
1800 			vfd->v4l2_dev->name);
1801 	return ret;
1802 }
1803 
1804 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1805 				struct file *file, void *fh, void *arg)
1806 {
1807 #ifdef CONFIG_VIDEO_ADV_DEBUG
1808 	struct v4l2_dbg_register *p = arg;
1809 	struct video_device *vfd = video_devdata(file);
1810 	struct v4l2_subdev *sd;
1811 	int idx = 0;
1812 
1813 	if (!capable(CAP_SYS_ADMIN))
1814 		return -EPERM;
1815 	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1816 		if (vfd->v4l2_dev == NULL)
1817 			return -EINVAL;
1818 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1819 			if (p->match.addr == idx++)
1820 				return v4l2_subdev_call(sd, core, g_register, p);
1821 		return -EINVAL;
1822 	}
1823 	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1824 	    (ops->vidioc_g_chip_info || p->match.addr == 0))
1825 		return ops->vidioc_g_register(file, fh, p);
1826 	return -EINVAL;
1827 #else
1828 	return -ENOTTY;
1829 #endif
1830 }
1831 
1832 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1833 				struct file *file, void *fh, void *arg)
1834 {
1835 #ifdef CONFIG_VIDEO_ADV_DEBUG
1836 	const struct v4l2_dbg_register *p = arg;
1837 	struct video_device *vfd = video_devdata(file);
1838 	struct v4l2_subdev *sd;
1839 	int idx = 0;
1840 
1841 	if (!capable(CAP_SYS_ADMIN))
1842 		return -EPERM;
1843 	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1844 		if (vfd->v4l2_dev == NULL)
1845 			return -EINVAL;
1846 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1847 			if (p->match.addr == idx++)
1848 				return v4l2_subdev_call(sd, core, s_register, p);
1849 		return -EINVAL;
1850 	}
1851 	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1852 	    (ops->vidioc_g_chip_info || p->match.addr == 0))
1853 		return ops->vidioc_s_register(file, fh, p);
1854 	return -EINVAL;
1855 #else
1856 	return -ENOTTY;
1857 #endif
1858 }
1859 
1860 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1861 				struct file *file, void *fh, void *arg)
1862 {
1863 #ifdef CONFIG_VIDEO_ADV_DEBUG
1864 	struct video_device *vfd = video_devdata(file);
1865 	struct v4l2_dbg_chip_info *p = arg;
1866 	struct v4l2_subdev *sd;
1867 	int idx = 0;
1868 
1869 	switch (p->match.type) {
1870 	case V4L2_CHIP_MATCH_BRIDGE:
1871 		if (ops->vidioc_s_register)
1872 			p->flags |= V4L2_CHIP_FL_WRITABLE;
1873 		if (ops->vidioc_g_register)
1874 			p->flags |= V4L2_CHIP_FL_READABLE;
1875 		strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1876 		if (ops->vidioc_g_chip_info)
1877 			return ops->vidioc_g_chip_info(file, fh, arg);
1878 		if (p->match.addr)
1879 			return -EINVAL;
1880 		return 0;
1881 
1882 	case V4L2_CHIP_MATCH_SUBDEV:
1883 		if (vfd->v4l2_dev == NULL)
1884 			break;
1885 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1886 			if (p->match.addr != idx++)
1887 				continue;
1888 			if (sd->ops->core && sd->ops->core->s_register)
1889 				p->flags |= V4L2_CHIP_FL_WRITABLE;
1890 			if (sd->ops->core && sd->ops->core->g_register)
1891 				p->flags |= V4L2_CHIP_FL_READABLE;
1892 			strlcpy(p->name, sd->name, sizeof(p->name));
1893 			return 0;
1894 		}
1895 		break;
1896 	}
1897 	return -EINVAL;
1898 #else
1899 	return -ENOTTY;
1900 #endif
1901 }
1902 
1903 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1904 				struct file *file, void *fh, void *arg)
1905 {
1906 	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1907 }
1908 
1909 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1910 				struct file *file, void *fh, void *arg)
1911 {
1912 	return ops->vidioc_subscribe_event(fh, arg);
1913 }
1914 
1915 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1916 				struct file *file, void *fh, void *arg)
1917 {
1918 	return ops->vidioc_unsubscribe_event(fh, arg);
1919 }
1920 
1921 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1922 				struct file *file, void *fh, void *arg)
1923 {
1924 	struct v4l2_sliced_vbi_cap *p = arg;
1925 	int ret = check_fmt(file, p->type);
1926 
1927 	if (ret)
1928 		return ret;
1929 
1930 	/* Clear up to type, everything after type is zeroed already */
1931 	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1932 
1933 	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1934 }
1935 
1936 static int v4l_enum_freq_bands(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_frequency_band *p = arg;
1941 	enum v4l2_tuner_type type;
1942 	int err;
1943 
1944 	if (vfd->vfl_type == VFL_TYPE_SDR) {
1945 		if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1946 			return -EINVAL;
1947 		type = p->type;
1948 	} else {
1949 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1950 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1951 		if (type != p->type)
1952 			return -EINVAL;
1953 	}
1954 	if (ops->vidioc_enum_freq_bands)
1955 		return ops->vidioc_enum_freq_bands(file, fh, p);
1956 	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1957 		struct v4l2_tuner t = {
1958 			.index = p->tuner,
1959 			.type = type,
1960 		};
1961 
1962 		if (p->index)
1963 			return -EINVAL;
1964 		err = ops->vidioc_g_tuner(file, fh, &t);
1965 		if (err)
1966 			return err;
1967 		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1968 		p->rangelow = t.rangelow;
1969 		p->rangehigh = t.rangehigh;
1970 		p->modulation = (type == V4L2_TUNER_RADIO) ?
1971 			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1972 		return 0;
1973 	}
1974 	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1975 		struct v4l2_modulator m = {
1976 			.index = p->tuner,
1977 		};
1978 
1979 		if (type != V4L2_TUNER_RADIO)
1980 			return -EINVAL;
1981 		if (p->index)
1982 			return -EINVAL;
1983 		err = ops->vidioc_g_modulator(file, fh, &m);
1984 		if (err)
1985 			return err;
1986 		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1987 		p->rangelow = m.rangelow;
1988 		p->rangehigh = m.rangehigh;
1989 		p->modulation = (type == V4L2_TUNER_RADIO) ?
1990 			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1991 		return 0;
1992 	}
1993 	return -ENOTTY;
1994 }
1995 
1996 struct v4l2_ioctl_info {
1997 	unsigned int ioctl;
1998 	u32 flags;
1999 	const char * const name;
2000 	union {
2001 		u32 offset;
2002 		int (*func)(const struct v4l2_ioctl_ops *ops,
2003 				struct file *file, void *fh, void *p);
2004 	} u;
2005 	void (*debug)(const void *arg, bool write_only);
2006 };
2007 
2008 /* This control needs a priority check */
2009 #define INFO_FL_PRIO	(1 << 0)
2010 /* This control can be valid if the filehandle passes a control handler. */
2011 #define INFO_FL_CTRL	(1 << 1)
2012 /* This is a standard ioctl, no need for special code */
2013 #define INFO_FL_STD	(1 << 2)
2014 /* This is ioctl has its own function */
2015 #define INFO_FL_FUNC	(1 << 3)
2016 /* Queuing ioctl */
2017 #define INFO_FL_QUEUE	(1 << 4)
2018 /* Zero struct from after the field to the end */
2019 #define INFO_FL_CLEAR(v4l2_struct, field)			\
2020 	((offsetof(struct v4l2_struct, field) +			\
2021 	  sizeof(((struct v4l2_struct *)0)->field)) << 16)
2022 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2023 
2024 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)			\
2025 	[_IOC_NR(_ioctl)] = {						\
2026 		.ioctl = _ioctl,					\
2027 		.flags = _flags | INFO_FL_STD,				\
2028 		.name = #_ioctl,					\
2029 		.u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),	\
2030 		.debug = _debug,					\
2031 	}
2032 
2033 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)			\
2034 	[_IOC_NR(_ioctl)] = {						\
2035 		.ioctl = _ioctl,					\
2036 		.flags = _flags | INFO_FL_FUNC,				\
2037 		.name = #_ioctl,					\
2038 		.u.func = _func,					\
2039 		.debug = _debug,					\
2040 	}
2041 
2042 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2043 	IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2044 	IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2045 	IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2046 	IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2047 	IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2048 	IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2049 	IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2050 	IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2051 	IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2052 	IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2053 	IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2054 	IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2055 	IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2056 	IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2057 	IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2058 	IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2059 	IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2060 	IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2061 	IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2062 	IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2063 	IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2064 	IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2065 	IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2066 	IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2067 	IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2068 	IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2069 	IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2070 	IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2071 	IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2072 	IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2073 	IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_CLEAR(v4l2_edid, edid)),
2074 	IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_edid, edid)),
2075 	IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2076 	IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2077 	IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2078 	IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2079 	IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2080 	IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2081 	IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2082 	IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2083 	IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2084 	IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2085 	IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2086 	IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2087 	IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2088 	IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2089 	IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2090 	IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2091 	IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2092 	IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2093 	IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2094 	IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2095 	IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2096 	IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2097 	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)),
2098 	IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2099 	IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2100 	IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2101 	IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2102 	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2103 	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2104 	IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2105 	IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2106 	IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2107 	IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2108 	IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2109 	IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2110 	IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2111 	IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2112 	IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2113 	IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2114 	IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2115 	IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2116 	IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2117 	IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2118 	IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2119 	IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2120 	IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2121 	IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2122 	IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2123 	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)),
2124 };
2125 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2126 
2127 bool v4l2_is_known_ioctl(unsigned int cmd)
2128 {
2129 	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2130 		return false;
2131 	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2132 }
2133 
2134 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2135 {
2136 	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2137 		return vdev->lock;
2138 	if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2139 		return NULL;
2140 	if (vdev->queue && vdev->queue->lock &&
2141 			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2142 		return vdev->queue->lock;
2143 	return vdev->lock;
2144 }
2145 
2146 /* Common ioctl debug function. This function can be used by
2147    external ioctl messages as well as internal V4L ioctl */
2148 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2149 {
2150 	const char *dir, *type;
2151 
2152 	if (prefix)
2153 		printk(KERN_DEBUG "%s: ", prefix);
2154 
2155 	switch (_IOC_TYPE(cmd)) {
2156 	case 'd':
2157 		type = "v4l2_int";
2158 		break;
2159 	case 'V':
2160 		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2161 			type = "v4l2";
2162 			break;
2163 		}
2164 		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2165 		return;
2166 	default:
2167 		type = "unknown";
2168 		break;
2169 	}
2170 
2171 	switch (_IOC_DIR(cmd)) {
2172 	case _IOC_NONE:              dir = "--"; break;
2173 	case _IOC_READ:              dir = "r-"; break;
2174 	case _IOC_WRITE:             dir = "-w"; break;
2175 	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2176 	default:                     dir = "*ERR*"; break;
2177 	}
2178 	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2179 		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2180 }
2181 EXPORT_SYMBOL(v4l_printk_ioctl);
2182 
2183 static long __video_do_ioctl(struct file *file,
2184 		unsigned int cmd, void *arg)
2185 {
2186 	struct video_device *vfd = video_devdata(file);
2187 	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2188 	bool write_only = false;
2189 	struct v4l2_ioctl_info default_info;
2190 	const struct v4l2_ioctl_info *info;
2191 	void *fh = file->private_data;
2192 	struct v4l2_fh *vfh = NULL;
2193 	int use_fh_prio = 0;
2194 	int debug = vfd->debug;
2195 	long ret = -ENOTTY;
2196 
2197 	if (ops == NULL) {
2198 		pr_warn("%s: has no ioctl_ops.\n",
2199 				video_device_node_name(vfd));
2200 		return ret;
2201 	}
2202 
2203 	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2204 		vfh = file->private_data;
2205 		use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2206 	}
2207 
2208 	if (v4l2_is_known_ioctl(cmd)) {
2209 		info = &v4l2_ioctls[_IOC_NR(cmd)];
2210 
2211 	        if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2212 		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2213 			goto done;
2214 
2215 		if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2216 			ret = v4l2_prio_check(vfd->prio, vfh->prio);
2217 			if (ret)
2218 				goto done;
2219 		}
2220 	} else {
2221 		default_info.ioctl = cmd;
2222 		default_info.flags = 0;
2223 		default_info.debug = v4l_print_default;
2224 		info = &default_info;
2225 	}
2226 
2227 	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2228 	if (info->flags & INFO_FL_STD) {
2229 		typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2230 		const void *p = vfd->ioctl_ops;
2231 		const vidioc_op *vidioc = p + info->u.offset;
2232 
2233 		ret = (*vidioc)(file, fh, arg);
2234 	} else if (info->flags & INFO_FL_FUNC) {
2235 		ret = info->u.func(ops, file, fh, arg);
2236 	} else if (!ops->vidioc_default) {
2237 		ret = -ENOTTY;
2238 	} else {
2239 		ret = ops->vidioc_default(file, fh,
2240 			use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2241 			cmd, arg);
2242 	}
2243 
2244 done:
2245 	if (debug) {
2246 		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2247 		if (ret < 0)
2248 			pr_cont(": error %ld", ret);
2249 		if (debug == V4L2_DEBUG_IOCTL)
2250 			pr_cont("\n");
2251 		else if (_IOC_DIR(cmd) == _IOC_NONE)
2252 			info->debug(arg, write_only);
2253 		else {
2254 			pr_cont(": ");
2255 			info->debug(arg, write_only);
2256 		}
2257 	}
2258 
2259 	return ret;
2260 }
2261 
2262 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2263 			    void __user **user_ptr, void ***kernel_ptr)
2264 {
2265 	int ret = 0;
2266 
2267 	switch (cmd) {
2268 	case VIDIOC_PREPARE_BUF:
2269 	case VIDIOC_QUERYBUF:
2270 	case VIDIOC_QBUF:
2271 	case VIDIOC_DQBUF: {
2272 		struct v4l2_buffer *buf = parg;
2273 
2274 		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2275 			if (buf->length > VIDEO_MAX_PLANES) {
2276 				ret = -EINVAL;
2277 				break;
2278 			}
2279 			*user_ptr = (void __user *)buf->m.planes;
2280 			*kernel_ptr = (void **)&buf->m.planes;
2281 			*array_size = sizeof(struct v4l2_plane) * buf->length;
2282 			ret = 1;
2283 		}
2284 		break;
2285 	}
2286 
2287 	case VIDIOC_G_EDID:
2288 	case VIDIOC_S_EDID: {
2289 		struct v4l2_edid *edid = parg;
2290 
2291 		if (edid->blocks) {
2292 			if (edid->blocks > 256) {
2293 				ret = -EINVAL;
2294 				break;
2295 			}
2296 			*user_ptr = (void __user *)edid->edid;
2297 			*kernel_ptr = (void **)&edid->edid;
2298 			*array_size = edid->blocks * 128;
2299 			ret = 1;
2300 		}
2301 		break;
2302 	}
2303 
2304 	case VIDIOC_S_EXT_CTRLS:
2305 	case VIDIOC_G_EXT_CTRLS:
2306 	case VIDIOC_TRY_EXT_CTRLS: {
2307 		struct v4l2_ext_controls *ctrls = parg;
2308 
2309 		if (ctrls->count != 0) {
2310 			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2311 				ret = -EINVAL;
2312 				break;
2313 			}
2314 			*user_ptr = (void __user *)ctrls->controls;
2315 			*kernel_ptr = (void **)&ctrls->controls;
2316 			*array_size = sizeof(struct v4l2_ext_control)
2317 				    * ctrls->count;
2318 			ret = 1;
2319 		}
2320 		break;
2321 	}
2322 	}
2323 
2324 	return ret;
2325 }
2326 
2327 long
2328 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2329 	       v4l2_kioctl func)
2330 {
2331 	char	sbuf[128];
2332 	void    *mbuf = NULL;
2333 	void	*parg = (void *)arg;
2334 	long	err  = -EINVAL;
2335 	bool	has_array_args;
2336 	size_t  array_size = 0;
2337 	void __user *user_ptr = NULL;
2338 	void	**kernel_ptr = NULL;
2339 
2340 	/*  Copy arguments into temp kernel buffer  */
2341 	if (_IOC_DIR(cmd) != _IOC_NONE) {
2342 		if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2343 			parg = sbuf;
2344 		} else {
2345 			/* too big to allocate from stack */
2346 			mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2347 			if (NULL == mbuf)
2348 				return -ENOMEM;
2349 			parg = mbuf;
2350 		}
2351 
2352 		err = -EFAULT;
2353 		if (_IOC_DIR(cmd) & _IOC_WRITE) {
2354 			unsigned int n = _IOC_SIZE(cmd);
2355 
2356 			/*
2357 			 * In some cases, only a few fields are used as input,
2358 			 * i.e. when the app sets "index" and then the driver
2359 			 * fills in the rest of the structure for the thing
2360 			 * with that index.  We only need to copy up the first
2361 			 * non-input field.
2362 			 */
2363 			if (v4l2_is_known_ioctl(cmd)) {
2364 				u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2365 				if (flags & INFO_FL_CLEAR_MASK)
2366 					n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2367 			}
2368 
2369 			if (copy_from_user(parg, (void __user *)arg, n))
2370 				goto out;
2371 
2372 			/* zero out anything we don't copy from userspace */
2373 			if (n < _IOC_SIZE(cmd))
2374 				memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2375 		} else {
2376 			/* read-only ioctl */
2377 			memset(parg, 0, _IOC_SIZE(cmd));
2378 		}
2379 	}
2380 
2381 	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2382 	if (err < 0)
2383 		goto out;
2384 	has_array_args = err;
2385 
2386 	if (has_array_args) {
2387 		/*
2388 		 * When adding new types of array args, make sure that the
2389 		 * parent argument to ioctl (which contains the pointer to the
2390 		 * array) fits into sbuf (so that mbuf will still remain
2391 		 * unused up to here).
2392 		 */
2393 		mbuf = kmalloc(array_size, GFP_KERNEL);
2394 		err = -ENOMEM;
2395 		if (NULL == mbuf)
2396 			goto out_array_args;
2397 		err = -EFAULT;
2398 		if (copy_from_user(mbuf, user_ptr, array_size))
2399 			goto out_array_args;
2400 		*kernel_ptr = mbuf;
2401 	}
2402 
2403 	/* Handles IOCTL */
2404 	err = func(file, cmd, parg);
2405 	if (err == -ENOIOCTLCMD)
2406 		err = -ENOTTY;
2407 	if (err == 0) {
2408 		if (cmd == VIDIOC_DQBUF)
2409 			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2410 		else if (cmd == VIDIOC_QBUF)
2411 			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2412 	}
2413 
2414 	if (has_array_args) {
2415 		*kernel_ptr = (void __force *)user_ptr;
2416 		if (copy_to_user(user_ptr, mbuf, array_size))
2417 			err = -EFAULT;
2418 		goto out_array_args;
2419 	}
2420 	/* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2421 	   results that must be returned. */
2422 	if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2423 		goto out;
2424 
2425 out_array_args:
2426 	/*  Copy results into user buffer  */
2427 	switch (_IOC_DIR(cmd)) {
2428 	case _IOC_READ:
2429 	case (_IOC_WRITE | _IOC_READ):
2430 		if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2431 			err = -EFAULT;
2432 		break;
2433 	}
2434 
2435 out:
2436 	kfree(mbuf);
2437 	return err;
2438 }
2439 EXPORT_SYMBOL(video_usercopy);
2440 
2441 long video_ioctl2(struct file *file,
2442 	       unsigned int cmd, unsigned long arg)
2443 {
2444 	return video_usercopy(file, cmd, arg, __video_do_ioctl);
2445 }
2446 EXPORT_SYMBOL(video_ioctl2);
2447