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, "
260 			"flags=0x%x, ycbcr_enc=%u, quantization=%u\n",
261 			pix->width, pix->height,
262 			(pix->pixelformat & 0xff),
263 			(pix->pixelformat >>  8) & 0xff,
264 			(pix->pixelformat >> 16) & 0xff,
265 			(pix->pixelformat >> 24) & 0xff,
266 			prt_names(pix->field, v4l2_field_names),
267 			pix->bytesperline, pix->sizeimage,
268 			pix->colorspace, pix->flags, pix->ycbcr_enc,
269 			pix->quantization);
270 		break;
271 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
272 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
273 		mp = &p->fmt.pix_mp;
274 		pr_cont(", width=%u, height=%u, "
275 			"format=%c%c%c%c, field=%s, "
276 			"colorspace=%d, num_planes=%u, flags=0x%x, "
277 			"ycbcr_enc=%u, quantization=%u\n",
278 			mp->width, mp->height,
279 			(mp->pixelformat & 0xff),
280 			(mp->pixelformat >>  8) & 0xff,
281 			(mp->pixelformat >> 16) & 0xff,
282 			(mp->pixelformat >> 24) & 0xff,
283 			prt_names(mp->field, v4l2_field_names),
284 			mp->colorspace, mp->num_planes, mp->flags,
285 			mp->ycbcr_enc, mp->quantization);
286 		for (i = 0; i < mp->num_planes; i++)
287 			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
288 					mp->plane_fmt[i].bytesperline,
289 					mp->plane_fmt[i].sizeimage);
290 		break;
291 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
292 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
293 		win = &p->fmt.win;
294 		/* Note: we can't print the clip list here since the clips
295 		 * pointer is a userspace pointer, not a kernelspace
296 		 * pointer. */
297 		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",
298 			win->w.width, win->w.height, win->w.left, win->w.top,
299 			prt_names(win->field, v4l2_field_names),
300 			win->chromakey, win->clipcount, win->clips,
301 			win->bitmap, win->global_alpha);
302 		break;
303 	case V4L2_BUF_TYPE_VBI_CAPTURE:
304 	case V4L2_BUF_TYPE_VBI_OUTPUT:
305 		vbi = &p->fmt.vbi;
306 		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
307 			"sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
308 			vbi->sampling_rate, vbi->offset,
309 			vbi->samples_per_line,
310 			(vbi->sample_format & 0xff),
311 			(vbi->sample_format >>  8) & 0xff,
312 			(vbi->sample_format >> 16) & 0xff,
313 			(vbi->sample_format >> 24) & 0xff,
314 			vbi->start[0], vbi->start[1],
315 			vbi->count[0], vbi->count[1]);
316 		break;
317 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
318 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
319 		sliced = &p->fmt.sliced;
320 		pr_cont(", service_set=0x%08x, io_size=%d\n",
321 				sliced->service_set, sliced->io_size);
322 		for (i = 0; i < 24; i++)
323 			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
324 				sliced->service_lines[0][i],
325 				sliced->service_lines[1][i]);
326 		break;
327 	case V4L2_BUF_TYPE_SDR_CAPTURE:
328 		sdr = &p->fmt.sdr;
329 		pr_cont(", pixelformat=%c%c%c%c\n",
330 			(sdr->pixelformat >>  0) & 0xff,
331 			(sdr->pixelformat >>  8) & 0xff,
332 			(sdr->pixelformat >> 16) & 0xff,
333 			(sdr->pixelformat >> 24) & 0xff);
334 		break;
335 	}
336 }
337 
338 static void v4l_print_framebuffer(const void *arg, bool write_only)
339 {
340 	const struct v4l2_framebuffer *p = arg;
341 
342 	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
343 		"height=%u, pixelformat=%c%c%c%c, "
344 		"bytesperline=%u, sizeimage=%u, colorspace=%d\n",
345 			p->capability, p->flags, p->base,
346 			p->fmt.width, p->fmt.height,
347 			(p->fmt.pixelformat & 0xff),
348 			(p->fmt.pixelformat >>  8) & 0xff,
349 			(p->fmt.pixelformat >> 16) & 0xff,
350 			(p->fmt.pixelformat >> 24) & 0xff,
351 			p->fmt.bytesperline, p->fmt.sizeimage,
352 			p->fmt.colorspace);
353 }
354 
355 static void v4l_print_buftype(const void *arg, bool write_only)
356 {
357 	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
358 }
359 
360 static void v4l_print_modulator(const void *arg, bool write_only)
361 {
362 	const struct v4l2_modulator *p = arg;
363 
364 	if (write_only)
365 		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
366 	else
367 		pr_cont("index=%u, name=%.*s, capability=0x%x, "
368 			"rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
369 			p->index, (int)sizeof(p->name), p->name, p->capability,
370 			p->rangelow, p->rangehigh, p->txsubchans);
371 }
372 
373 static void v4l_print_tuner(const void *arg, bool write_only)
374 {
375 	const struct v4l2_tuner *p = arg;
376 
377 	if (write_only)
378 		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
379 	else
380 		pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
381 			"rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
382 			"rxsubchans=0x%x, audmode=%u\n",
383 			p->index, (int)sizeof(p->name), p->name, p->type,
384 			p->capability, p->rangelow,
385 			p->rangehigh, p->signal, p->afc,
386 			p->rxsubchans, p->audmode);
387 }
388 
389 static void v4l_print_frequency(const void *arg, bool write_only)
390 {
391 	const struct v4l2_frequency *p = arg;
392 
393 	pr_cont("tuner=%u, type=%u, frequency=%u\n",
394 				p->tuner, p->type, p->frequency);
395 }
396 
397 static void v4l_print_standard(const void *arg, bool write_only)
398 {
399 	const struct v4l2_standard *p = arg;
400 
401 	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
402 		"framelines=%u\n", p->index,
403 		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
404 		p->frameperiod.numerator,
405 		p->frameperiod.denominator,
406 		p->framelines);
407 }
408 
409 static void v4l_print_std(const void *arg, bool write_only)
410 {
411 	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
412 }
413 
414 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
415 {
416 	const struct v4l2_hw_freq_seek *p = arg;
417 
418 	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
419 		"rangelow=%u, rangehigh=%u\n",
420 		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
421 		p->rangelow, p->rangehigh);
422 }
423 
424 static void v4l_print_requestbuffers(const void *arg, bool write_only)
425 {
426 	const struct v4l2_requestbuffers *p = arg;
427 
428 	pr_cont("count=%d, type=%s, memory=%s\n",
429 		p->count,
430 		prt_names(p->type, v4l2_type_names),
431 		prt_names(p->memory, v4l2_memory_names));
432 }
433 
434 static void v4l_print_buffer(const void *arg, bool write_only)
435 {
436 	const struct v4l2_buffer *p = arg;
437 	const struct v4l2_timecode *tc = &p->timecode;
438 	const struct v4l2_plane *plane;
439 	int i;
440 
441 	pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
442 		"flags=0x%08x, field=%s, sequence=%d, memory=%s",
443 			p->timestamp.tv_sec / 3600,
444 			(int)(p->timestamp.tv_sec / 60) % 60,
445 			(int)(p->timestamp.tv_sec % 60),
446 			(long)p->timestamp.tv_usec,
447 			p->index,
448 			prt_names(p->type, v4l2_type_names),
449 			p->flags, prt_names(p->field, v4l2_field_names),
450 			p->sequence, prt_names(p->memory, v4l2_memory_names));
451 
452 	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
453 		pr_cont("\n");
454 		for (i = 0; i < p->length; ++i) {
455 			plane = &p->m.planes[i];
456 			printk(KERN_DEBUG
457 				"plane %d: bytesused=%d, data_offset=0x%08x, "
458 				"offset/userptr=0x%lx, length=%d\n",
459 				i, plane->bytesused, plane->data_offset,
460 				plane->m.userptr, plane->length);
461 		}
462 	} else {
463 		pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
464 			p->bytesused, p->m.userptr, p->length);
465 	}
466 
467 	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
468 		"flags=0x%08x, frames=%d, userbits=0x%08x\n",
469 			tc->hours, tc->minutes, tc->seconds,
470 			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
471 }
472 
473 static void v4l_print_exportbuffer(const void *arg, bool write_only)
474 {
475 	const struct v4l2_exportbuffer *p = arg;
476 
477 	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
478 		p->fd, prt_names(p->type, v4l2_type_names),
479 		p->index, p->plane, p->flags);
480 }
481 
482 static void v4l_print_create_buffers(const void *arg, bool write_only)
483 {
484 	const struct v4l2_create_buffers *p = arg;
485 
486 	pr_cont("index=%d, count=%d, memory=%s, ",
487 			p->index, p->count,
488 			prt_names(p->memory, v4l2_memory_names));
489 	v4l_print_format(&p->format, write_only);
490 }
491 
492 static void v4l_print_streamparm(const void *arg, bool write_only)
493 {
494 	const struct v4l2_streamparm *p = arg;
495 
496 	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
497 
498 	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
499 	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
500 		const struct v4l2_captureparm *c = &p->parm.capture;
501 
502 		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
503 			"extendedmode=%d, readbuffers=%d\n",
504 			c->capability, c->capturemode,
505 			c->timeperframe.numerator, c->timeperframe.denominator,
506 			c->extendedmode, c->readbuffers);
507 	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
508 		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
509 		const struct v4l2_outputparm *c = &p->parm.output;
510 
511 		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
512 			"extendedmode=%d, writebuffers=%d\n",
513 			c->capability, c->outputmode,
514 			c->timeperframe.numerator, c->timeperframe.denominator,
515 			c->extendedmode, c->writebuffers);
516 	} else {
517 		pr_cont("\n");
518 	}
519 }
520 
521 static void v4l_print_queryctrl(const void *arg, bool write_only)
522 {
523 	const struct v4l2_queryctrl *p = arg;
524 
525 	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
526 		"step=%d, default=%d, flags=0x%08x\n",
527 			p->id, p->type, (int)sizeof(p->name), p->name,
528 			p->minimum, p->maximum,
529 			p->step, p->default_value, p->flags);
530 }
531 
532 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
533 {
534 	const struct v4l2_query_ext_ctrl *p = arg;
535 
536 	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
537 		"step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
538 		"nr_of_dims=%u, dims=%u,%u,%u,%u\n",
539 			p->id, p->type, (int)sizeof(p->name), p->name,
540 			p->minimum, p->maximum,
541 			p->step, p->default_value, p->flags,
542 			p->elem_size, p->elems, p->nr_of_dims,
543 			p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
544 }
545 
546 static void v4l_print_querymenu(const void *arg, bool write_only)
547 {
548 	const struct v4l2_querymenu *p = arg;
549 
550 	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
551 }
552 
553 static void v4l_print_control(const void *arg, bool write_only)
554 {
555 	const struct v4l2_control *p = arg;
556 
557 	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
558 }
559 
560 static void v4l_print_ext_controls(const void *arg, bool write_only)
561 {
562 	const struct v4l2_ext_controls *p = arg;
563 	int i;
564 
565 	pr_cont("class=0x%x, count=%d, error_idx=%d",
566 			p->ctrl_class, p->count, p->error_idx);
567 	for (i = 0; i < p->count; i++) {
568 		if (!p->controls[i].size)
569 			pr_cont(", id/val=0x%x/0x%x",
570 				p->controls[i].id, p->controls[i].value);
571 		else
572 			pr_cont(", id/size=0x%x/%u",
573 				p->controls[i].id, p->controls[i].size);
574 	}
575 	pr_cont("\n");
576 }
577 
578 static void v4l_print_cropcap(const void *arg, bool write_only)
579 {
580 	const struct v4l2_cropcap *p = arg;
581 
582 	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
583 		"defrect wxh=%dx%d, x,y=%d,%d, "
584 		"pixelaspect %d/%d\n",
585 		prt_names(p->type, v4l2_type_names),
586 		p->bounds.width, p->bounds.height,
587 		p->bounds.left, p->bounds.top,
588 		p->defrect.width, p->defrect.height,
589 		p->defrect.left, p->defrect.top,
590 		p->pixelaspect.numerator, p->pixelaspect.denominator);
591 }
592 
593 static void v4l_print_crop(const void *arg, bool write_only)
594 {
595 	const struct v4l2_crop *p = arg;
596 
597 	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
598 		prt_names(p->type, v4l2_type_names),
599 		p->c.width, p->c.height,
600 		p->c.left, p->c.top);
601 }
602 
603 static void v4l_print_selection(const void *arg, bool write_only)
604 {
605 	const struct v4l2_selection *p = arg;
606 
607 	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
608 		prt_names(p->type, v4l2_type_names),
609 		p->target, p->flags,
610 		p->r.width, p->r.height, p->r.left, p->r.top);
611 }
612 
613 static void v4l_print_jpegcompression(const void *arg, bool write_only)
614 {
615 	const struct v4l2_jpegcompression *p = arg;
616 
617 	pr_cont("quality=%d, APPn=%d, APP_len=%d, "
618 		"COM_len=%d, jpeg_markers=0x%x\n",
619 		p->quality, p->APPn, p->APP_len,
620 		p->COM_len, p->jpeg_markers);
621 }
622 
623 static void v4l_print_enc_idx(const void *arg, bool write_only)
624 {
625 	const struct v4l2_enc_idx *p = arg;
626 
627 	pr_cont("entries=%d, entries_cap=%d\n",
628 			p->entries, p->entries_cap);
629 }
630 
631 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
632 {
633 	const struct v4l2_encoder_cmd *p = arg;
634 
635 	pr_cont("cmd=%d, flags=0x%x\n",
636 			p->cmd, p->flags);
637 }
638 
639 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
640 {
641 	const struct v4l2_decoder_cmd *p = arg;
642 
643 	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
644 
645 	if (p->cmd == V4L2_DEC_CMD_START)
646 		pr_info("speed=%d, format=%u\n",
647 				p->start.speed, p->start.format);
648 	else if (p->cmd == V4L2_DEC_CMD_STOP)
649 		pr_info("pts=%llu\n", p->stop.pts);
650 }
651 
652 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
653 {
654 	const struct v4l2_dbg_chip_info *p = arg;
655 
656 	pr_cont("type=%u, ", p->match.type);
657 	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
658 		pr_cont("name=%.*s, ",
659 				(int)sizeof(p->match.name), p->match.name);
660 	else
661 		pr_cont("addr=%u, ", p->match.addr);
662 	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
663 }
664 
665 static void v4l_print_dbg_register(const void *arg, bool write_only)
666 {
667 	const struct v4l2_dbg_register *p = arg;
668 
669 	pr_cont("type=%u, ", p->match.type);
670 	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
671 		pr_cont("name=%.*s, ",
672 				(int)sizeof(p->match.name), p->match.name);
673 	else
674 		pr_cont("addr=%u, ", p->match.addr);
675 	pr_cont("reg=0x%llx, val=0x%llx\n",
676 			p->reg, p->val);
677 }
678 
679 static void v4l_print_dv_timings(const void *arg, bool write_only)
680 {
681 	const struct v4l2_dv_timings *p = arg;
682 
683 	switch (p->type) {
684 	case V4L2_DV_BT_656_1120:
685 		pr_cont("type=bt-656/1120, interlaced=%u, "
686 			"pixelclock=%llu, "
687 			"width=%u, height=%u, polarities=0x%x, "
688 			"hfrontporch=%u, hsync=%u, "
689 			"hbackporch=%u, vfrontporch=%u, "
690 			"vsync=%u, vbackporch=%u, "
691 			"il_vfrontporch=%u, il_vsync=%u, "
692 			"il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
693 				p->bt.interlaced, p->bt.pixelclock,
694 				p->bt.width, p->bt.height,
695 				p->bt.polarities, p->bt.hfrontporch,
696 				p->bt.hsync, p->bt.hbackporch,
697 				p->bt.vfrontporch, p->bt.vsync,
698 				p->bt.vbackporch, p->bt.il_vfrontporch,
699 				p->bt.il_vsync, p->bt.il_vbackporch,
700 				p->bt.standards, p->bt.flags);
701 		break;
702 	default:
703 		pr_cont("type=%d\n", p->type);
704 		break;
705 	}
706 }
707 
708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
709 {
710 	const struct v4l2_enum_dv_timings *p = arg;
711 
712 	pr_cont("index=%u, ", p->index);
713 	v4l_print_dv_timings(&p->timings, write_only);
714 }
715 
716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
717 {
718 	const struct v4l2_dv_timings_cap *p = arg;
719 
720 	switch (p->type) {
721 	case V4L2_DV_BT_656_1120:
722 		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
723 			"pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
724 			p->bt.min_width, p->bt.max_width,
725 			p->bt.min_height, p->bt.max_height,
726 			p->bt.min_pixelclock, p->bt.max_pixelclock,
727 			p->bt.standards, p->bt.capabilities);
728 		break;
729 	default:
730 		pr_cont("type=%u\n", p->type);
731 		break;
732 	}
733 }
734 
735 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
736 {
737 	const struct v4l2_frmsizeenum *p = arg;
738 
739 	pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
740 			p->index,
741 			(p->pixel_format & 0xff),
742 			(p->pixel_format >>  8) & 0xff,
743 			(p->pixel_format >> 16) & 0xff,
744 			(p->pixel_format >> 24) & 0xff,
745 			p->type);
746 	switch (p->type) {
747 	case V4L2_FRMSIZE_TYPE_DISCRETE:
748 		pr_cont(", wxh=%ux%u\n",
749 			p->discrete.width, p->discrete.height);
750 		break;
751 	case V4L2_FRMSIZE_TYPE_STEPWISE:
752 		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
753 				p->stepwise.min_width,  p->stepwise.min_height,
754 				p->stepwise.step_width, p->stepwise.step_height,
755 				p->stepwise.max_width,  p->stepwise.max_height);
756 		break;
757 	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
758 		/* fall through */
759 	default:
760 		pr_cont("\n");
761 		break;
762 	}
763 }
764 
765 static void v4l_print_frmivalenum(const void *arg, bool write_only)
766 {
767 	const struct v4l2_frmivalenum *p = arg;
768 
769 	pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
770 			p->index,
771 			(p->pixel_format & 0xff),
772 			(p->pixel_format >>  8) & 0xff,
773 			(p->pixel_format >> 16) & 0xff,
774 			(p->pixel_format >> 24) & 0xff,
775 			p->width, p->height, p->type);
776 	switch (p->type) {
777 	case V4L2_FRMIVAL_TYPE_DISCRETE:
778 		pr_cont(", fps=%d/%d\n",
779 				p->discrete.numerator,
780 				p->discrete.denominator);
781 		break;
782 	case V4L2_FRMIVAL_TYPE_STEPWISE:
783 		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
784 				p->stepwise.min.numerator,
785 				p->stepwise.min.denominator,
786 				p->stepwise.max.numerator,
787 				p->stepwise.max.denominator,
788 				p->stepwise.step.numerator,
789 				p->stepwise.step.denominator);
790 		break;
791 	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
792 		/* fall through */
793 	default:
794 		pr_cont("\n");
795 		break;
796 	}
797 }
798 
799 static void v4l_print_event(const void *arg, bool write_only)
800 {
801 	const struct v4l2_event *p = arg;
802 	const struct v4l2_event_ctrl *c;
803 
804 	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
805 		"timestamp=%lu.%9.9lu\n",
806 			p->type, p->pending, p->sequence, p->id,
807 			p->timestamp.tv_sec, p->timestamp.tv_nsec);
808 	switch (p->type) {
809 	case V4L2_EVENT_VSYNC:
810 		printk(KERN_DEBUG "field=%s\n",
811 			prt_names(p->u.vsync.field, v4l2_field_names));
812 		break;
813 	case V4L2_EVENT_CTRL:
814 		c = &p->u.ctrl;
815 		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
816 			c->changes, c->type);
817 		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
818 			pr_cont("value64=%lld, ", c->value64);
819 		else
820 			pr_cont("value=%d, ", c->value);
821 		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
822 			"default_value=%d\n",
823 			c->flags, c->minimum, c->maximum,
824 			c->step, c->default_value);
825 		break;
826 	case V4L2_EVENT_FRAME_SYNC:
827 		pr_cont("frame_sequence=%u\n",
828 			p->u.frame_sync.frame_sequence);
829 		break;
830 	}
831 }
832 
833 static void v4l_print_event_subscription(const void *arg, bool write_only)
834 {
835 	const struct v4l2_event_subscription *p = arg;
836 
837 	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
838 			p->type, p->id, p->flags);
839 }
840 
841 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
842 {
843 	const struct v4l2_sliced_vbi_cap *p = arg;
844 	int i;
845 
846 	pr_cont("type=%s, service_set=0x%08x\n",
847 			prt_names(p->type, v4l2_type_names), p->service_set);
848 	for (i = 0; i < 24; i++)
849 		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
850 				p->service_lines[0][i],
851 				p->service_lines[1][i]);
852 }
853 
854 static void v4l_print_freq_band(const void *arg, bool write_only)
855 {
856 	const struct v4l2_frequency_band *p = arg;
857 
858 	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
859 		"rangelow=%u, rangehigh=%u, modulation=0x%x\n",
860 			p->tuner, p->type, p->index,
861 			p->capability, p->rangelow,
862 			p->rangehigh, p->modulation);
863 }
864 
865 static void v4l_print_edid(const void *arg, bool write_only)
866 {
867 	const struct v4l2_edid *p = arg;
868 
869 	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
870 		p->pad, p->start_block, p->blocks);
871 }
872 
873 static void v4l_print_u32(const void *arg, bool write_only)
874 {
875 	pr_cont("value=%u\n", *(const u32 *)arg);
876 }
877 
878 static void v4l_print_newline(const void *arg, bool write_only)
879 {
880 	pr_cont("\n");
881 }
882 
883 static void v4l_print_default(const void *arg, bool write_only)
884 {
885 	pr_cont("driver-specific ioctl\n");
886 }
887 
888 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
889 {
890 	__u32 i;
891 
892 	/* zero the reserved fields */
893 	c->reserved[0] = c->reserved[1] = 0;
894 	for (i = 0; i < c->count; i++)
895 		c->controls[i].reserved2[0] = 0;
896 
897 	/* V4L2_CID_PRIVATE_BASE cannot be used as control class
898 	   when using extended controls.
899 	   Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
900 	   is it allowed for backwards compatibility.
901 	 */
902 	if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
903 		return 0;
904 	if (c->ctrl_class == 0)
905 		return 1;
906 	/* Check that all controls are from the same control class. */
907 	for (i = 0; i < c->count; i++) {
908 		if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
909 			c->error_idx = i;
910 			return 0;
911 		}
912 	}
913 	return 1;
914 }
915 
916 static int check_fmt(struct file *file, enum v4l2_buf_type type)
917 {
918 	struct video_device *vfd = video_devdata(file);
919 	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
920 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
921 	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
922 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
923 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
924 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
925 
926 	if (ops == NULL)
927 		return -EINVAL;
928 
929 	switch (type) {
930 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
931 		if (is_vid && is_rx &&
932 		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
933 			return 0;
934 		break;
935 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
936 		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
937 			return 0;
938 		break;
939 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
940 		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
941 			return 0;
942 		break;
943 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
944 		if (is_vid && is_tx &&
945 		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
946 			return 0;
947 		break;
948 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
949 		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
950 			return 0;
951 		break;
952 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
953 		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
954 			return 0;
955 		break;
956 	case V4L2_BUF_TYPE_VBI_CAPTURE:
957 		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
958 			return 0;
959 		break;
960 	case V4L2_BUF_TYPE_VBI_OUTPUT:
961 		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
962 			return 0;
963 		break;
964 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
965 		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
966 			return 0;
967 		break;
968 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
969 		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
970 			return 0;
971 		break;
972 	case V4L2_BUF_TYPE_SDR_CAPTURE:
973 		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
974 			return 0;
975 		break;
976 	default:
977 		break;
978 	}
979 	return -EINVAL;
980 }
981 
982 static void v4l_sanitize_format(struct v4l2_format *fmt)
983 {
984 	unsigned int offset;
985 
986 	/*
987 	 * The v4l2_pix_format structure has been extended with fields that were
988 	 * not previously required to be set to zero by applications. The priv
989 	 * field, when set to a magic value, indicates the the extended fields
990 	 * are valid. Otherwise they will contain undefined values. To simplify
991 	 * the API towards drivers zero the extended fields and set the priv
992 	 * field to the magic value when the extended pixel format structure
993 	 * isn't used by applications.
994 	 */
995 
996 	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
997 	    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
998 		return;
999 
1000 	if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1001 		return;
1002 
1003 	fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1004 
1005 	offset = offsetof(struct v4l2_pix_format, priv)
1006 	       + sizeof(fmt->fmt.pix.priv);
1007 	memset(((void *)&fmt->fmt.pix) + offset, 0,
1008 	       sizeof(fmt->fmt.pix) - offset);
1009 }
1010 
1011 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1012 				struct file *file, void *fh, void *arg)
1013 {
1014 	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1015 	int ret;
1016 
1017 	cap->version = LINUX_VERSION_CODE;
1018 
1019 	ret = ops->vidioc_querycap(file, fh, cap);
1020 
1021 	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1022 	/*
1023 	 * Drivers MUST fill in device_caps, so check for this and
1024 	 * warn if it was forgotten.
1025 	 */
1026 	WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1027 		!cap->device_caps);
1028 	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1029 
1030 	return ret;
1031 }
1032 
1033 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1034 				struct file *file, void *fh, void *arg)
1035 {
1036 	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1037 }
1038 
1039 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1040 				struct file *file, void *fh, void *arg)
1041 {
1042 	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1043 }
1044 
1045 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1046 				struct file *file, void *fh, void *arg)
1047 {
1048 	struct video_device *vfd;
1049 	u32 *p = arg;
1050 
1051 	vfd = video_devdata(file);
1052 	*p = v4l2_prio_max(vfd->prio);
1053 	return 0;
1054 }
1055 
1056 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1057 				struct file *file, void *fh, void *arg)
1058 {
1059 	struct video_device *vfd;
1060 	struct v4l2_fh *vfh;
1061 	u32 *p = arg;
1062 
1063 	vfd = video_devdata(file);
1064 	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1065 		return -ENOTTY;
1066 	vfh = file->private_data;
1067 	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1068 }
1069 
1070 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1071 				struct file *file, void *fh, void *arg)
1072 {
1073 	struct video_device *vfd = video_devdata(file);
1074 	struct v4l2_input *p = arg;
1075 
1076 	/*
1077 	 * We set the flags for CAP_DV_TIMINGS &
1078 	 * CAP_STD here based on ioctl handler provided by the
1079 	 * driver. If the driver doesn't support these
1080 	 * for a specific input, it must override these flags.
1081 	 */
1082 	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1083 		p->capabilities |= V4L2_IN_CAP_STD;
1084 
1085 	return ops->vidioc_enum_input(file, fh, p);
1086 }
1087 
1088 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1089 				struct file *file, void *fh, void *arg)
1090 {
1091 	struct video_device *vfd = video_devdata(file);
1092 	struct v4l2_output *p = arg;
1093 
1094 	/*
1095 	 * We set the flags for CAP_DV_TIMINGS &
1096 	 * CAP_STD here based on ioctl handler provided by the
1097 	 * driver. If the driver doesn't support these
1098 	 * for a specific output, it must override these flags.
1099 	 */
1100 	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1101 		p->capabilities |= V4L2_OUT_CAP_STD;
1102 
1103 	return ops->vidioc_enum_output(file, fh, p);
1104 }
1105 
1106 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1107 				struct file *file, void *fh, void *arg)
1108 {
1109 	struct v4l2_fmtdesc *p = arg;
1110 	struct video_device *vfd = video_devdata(file);
1111 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1112 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1113 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1114 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1115 
1116 	switch (p->type) {
1117 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1118 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1119 			break;
1120 		return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1121 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1122 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1123 			break;
1124 		return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1125 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1126 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1127 			break;
1128 		return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1129 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1130 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1131 			break;
1132 		return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1133 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1134 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1135 			break;
1136 		return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1137 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1138 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1139 			break;
1140 		return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1141 	}
1142 	return -EINVAL;
1143 }
1144 
1145 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1146 				struct file *file, void *fh, void *arg)
1147 {
1148 	struct v4l2_format *p = arg;
1149 	struct video_device *vfd = video_devdata(file);
1150 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1151 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1152 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1153 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1154 	int ret;
1155 
1156 	/*
1157 	 * fmt can't be cleared for these overlay types due to the 'clips'
1158 	 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1159 	 * Those are provided by the user. So handle these two overlay types
1160 	 * first, and then just do a simple memset for the other types.
1161 	 */
1162 	switch (p->type) {
1163 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1164 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1165 		struct v4l2_clip __user *clips = p->fmt.win.clips;
1166 		u32 clipcount = p->fmt.win.clipcount;
1167 		void __user *bitmap = p->fmt.win.bitmap;
1168 
1169 		memset(&p->fmt, 0, sizeof(p->fmt));
1170 		p->fmt.win.clips = clips;
1171 		p->fmt.win.clipcount = clipcount;
1172 		p->fmt.win.bitmap = bitmap;
1173 		break;
1174 	}
1175 	default:
1176 		memset(&p->fmt, 0, sizeof(p->fmt));
1177 		break;
1178 	}
1179 
1180 	switch (p->type) {
1181 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1182 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1183 			break;
1184 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1185 		ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1186 		/* just in case the driver zeroed it again */
1187 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1188 		return ret;
1189 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1190 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1191 			break;
1192 		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1193 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1194 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1195 			break;
1196 		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1197 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1198 		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1199 			break;
1200 		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1201 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1202 		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1203 			break;
1204 		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1205 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1206 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1207 			break;
1208 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1209 		ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1210 		/* just in case the driver zeroed it again */
1211 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1212 		return ret;
1213 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1214 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1215 			break;
1216 		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1217 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1218 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1219 			break;
1220 		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1221 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1222 		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1223 			break;
1224 		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1225 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1226 		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1227 			break;
1228 		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1229 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1230 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1231 			break;
1232 		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1233 	}
1234 	return -EINVAL;
1235 }
1236 
1237 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1238 				struct file *file, void *fh, void *arg)
1239 {
1240 	struct v4l2_format *p = arg;
1241 	struct video_device *vfd = video_devdata(file);
1242 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1243 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1244 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1245 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1246 	int ret;
1247 
1248 	v4l_sanitize_format(p);
1249 
1250 	switch (p->type) {
1251 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1252 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1253 			break;
1254 		CLEAR_AFTER_FIELD(p, fmt.pix);
1255 		ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1256 		/* just in case the driver zeroed it again */
1257 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1258 		return ret;
1259 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1260 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1261 			break;
1262 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1263 		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1264 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1265 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1266 			break;
1267 		CLEAR_AFTER_FIELD(p, fmt.win);
1268 		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1269 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1270 		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1271 			break;
1272 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1273 		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1274 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1275 		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1276 			break;
1277 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1278 		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1279 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1280 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1281 			break;
1282 		CLEAR_AFTER_FIELD(p, fmt.pix);
1283 		ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1284 		/* just in case the driver zeroed it again */
1285 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1286 		return ret;
1287 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1288 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1289 			break;
1290 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1291 		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1292 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1293 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1294 			break;
1295 		CLEAR_AFTER_FIELD(p, fmt.win);
1296 		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1297 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1298 		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1299 			break;
1300 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1301 		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1302 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1303 		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1304 			break;
1305 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1306 		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1307 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1308 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1309 			break;
1310 		CLEAR_AFTER_FIELD(p, fmt.sdr);
1311 		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1312 	}
1313 	return -EINVAL;
1314 }
1315 
1316 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1317 				struct file *file, void *fh, void *arg)
1318 {
1319 	struct v4l2_format *p = arg;
1320 	struct video_device *vfd = video_devdata(file);
1321 	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1322 	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1323 	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1324 	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1325 	int ret;
1326 
1327 	v4l_sanitize_format(p);
1328 
1329 	switch (p->type) {
1330 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1331 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1332 			break;
1333 		CLEAR_AFTER_FIELD(p, fmt.pix);
1334 		ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1335 		/* just in case the driver zeroed it again */
1336 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1337 		return ret;
1338 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1339 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1340 			break;
1341 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1342 		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1343 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1344 		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1345 			break;
1346 		CLEAR_AFTER_FIELD(p, fmt.win);
1347 		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1348 	case V4L2_BUF_TYPE_VBI_CAPTURE:
1349 		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1350 			break;
1351 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1352 		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1353 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1354 		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1355 			break;
1356 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1357 		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1358 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1359 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1360 			break;
1361 		CLEAR_AFTER_FIELD(p, fmt.pix);
1362 		ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1363 		/* just in case the driver zeroed it again */
1364 		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1365 		return ret;
1366 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1367 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1368 			break;
1369 		CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1370 		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1371 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1372 		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1373 			break;
1374 		CLEAR_AFTER_FIELD(p, fmt.win);
1375 		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1376 	case V4L2_BUF_TYPE_VBI_OUTPUT:
1377 		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1378 			break;
1379 		CLEAR_AFTER_FIELD(p, fmt.vbi);
1380 		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1381 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1382 		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1383 			break;
1384 		CLEAR_AFTER_FIELD(p, fmt.sliced);
1385 		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1386 	case V4L2_BUF_TYPE_SDR_CAPTURE:
1387 		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1388 			break;
1389 		CLEAR_AFTER_FIELD(p, fmt.sdr);
1390 		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1391 	}
1392 	return -EINVAL;
1393 }
1394 
1395 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1396 				struct file *file, void *fh, void *arg)
1397 {
1398 	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1399 }
1400 
1401 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1402 				struct file *file, void *fh, void *arg)
1403 {
1404 	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1405 }
1406 
1407 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1408 				struct file *file, void *fh, void *arg)
1409 {
1410 	struct video_device *vfd = video_devdata(file);
1411 	struct v4l2_tuner *p = arg;
1412 	int err;
1413 
1414 	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1415 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1416 	err = ops->vidioc_g_tuner(file, fh, p);
1417 	if (!err)
1418 		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1419 	return err;
1420 }
1421 
1422 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1423 				struct file *file, void *fh, void *arg)
1424 {
1425 	struct video_device *vfd = video_devdata(file);
1426 	struct v4l2_tuner *p = arg;
1427 
1428 	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1429 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1430 	return ops->vidioc_s_tuner(file, fh, p);
1431 }
1432 
1433 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1434 				struct file *file, void *fh, void *arg)
1435 {
1436 	struct v4l2_modulator *p = arg;
1437 	int err;
1438 
1439 	err = ops->vidioc_g_modulator(file, fh, p);
1440 	if (!err)
1441 		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1442 	return err;
1443 }
1444 
1445 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1446 				struct file *file, void *fh, void *arg)
1447 {
1448 	struct video_device *vfd = video_devdata(file);
1449 	struct v4l2_frequency *p = arg;
1450 
1451 	if (vfd->vfl_type == VFL_TYPE_SDR)
1452 		p->type = V4L2_TUNER_ADC;
1453 	else
1454 		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1455 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1456 	return ops->vidioc_g_frequency(file, fh, p);
1457 }
1458 
1459 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1460 				struct file *file, void *fh, void *arg)
1461 {
1462 	struct video_device *vfd = video_devdata(file);
1463 	const struct v4l2_frequency *p = arg;
1464 	enum v4l2_tuner_type type;
1465 
1466 	if (vfd->vfl_type == VFL_TYPE_SDR) {
1467 		if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1468 			return -EINVAL;
1469 	} else {
1470 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1471 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1472 		if (type != p->type)
1473 			return -EINVAL;
1474 	}
1475 	return ops->vidioc_s_frequency(file, fh, p);
1476 }
1477 
1478 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1479 				struct file *file, void *fh, void *arg)
1480 {
1481 	struct video_device *vfd = video_devdata(file);
1482 	struct v4l2_standard *p = arg;
1483 	v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1484 	unsigned int index = p->index, i, j = 0;
1485 	const char *descr = "";
1486 
1487 	/* Return -ENODATA if the tvnorms for the current input
1488 	   or output is 0, meaning that it doesn't support this API. */
1489 	if (id == 0)
1490 		return -ENODATA;
1491 
1492 	/* Return norm array in a canonical way */
1493 	for (i = 0; i <= index && id; i++) {
1494 		/* last std value in the standards array is 0, so this
1495 		   while always ends there since (id & 0) == 0. */
1496 		while ((id & standards[j].std) != standards[j].std)
1497 			j++;
1498 		curr_id = standards[j].std;
1499 		descr = standards[j].descr;
1500 		j++;
1501 		if (curr_id == 0)
1502 			break;
1503 		if (curr_id != V4L2_STD_PAL &&
1504 				curr_id != V4L2_STD_SECAM &&
1505 				curr_id != V4L2_STD_NTSC)
1506 			id &= ~curr_id;
1507 	}
1508 	if (i <= index)
1509 		return -EINVAL;
1510 
1511 	v4l2_video_std_construct(p, curr_id, descr);
1512 	return 0;
1513 }
1514 
1515 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1516 				struct file *file, void *fh, void *arg)
1517 {
1518 	struct video_device *vfd = video_devdata(file);
1519 	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1520 
1521 	norm = id & vfd->tvnorms;
1522 	if (vfd->tvnorms && !norm)	/* Check if std is supported */
1523 		return -EINVAL;
1524 
1525 	/* Calls the specific handler */
1526 	return ops->vidioc_s_std(file, fh, norm);
1527 }
1528 
1529 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1530 				struct file *file, void *fh, void *arg)
1531 {
1532 	struct video_device *vfd = video_devdata(file);
1533 	v4l2_std_id *p = arg;
1534 
1535 	/*
1536 	 * If no signal is detected, then the driver should return
1537 	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1538 	 * any standards that do not apply removed.
1539 	 *
1540 	 * This means that tuners, audio and video decoders can join
1541 	 * their efforts to improve the standards detection.
1542 	 */
1543 	*p = vfd->tvnorms;
1544 	return ops->vidioc_querystd(file, fh, arg);
1545 }
1546 
1547 static int v4l_s_hw_freq_seek(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_hw_freq_seek *p = arg;
1552 	enum v4l2_tuner_type type;
1553 
1554 	/* s_hw_freq_seek is not supported for SDR for now */
1555 	if (vfd->vfl_type == VFL_TYPE_SDR)
1556 		return -EINVAL;
1557 
1558 	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1559 		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1560 	if (p->type != type)
1561 		return -EINVAL;
1562 	return ops->vidioc_s_hw_freq_seek(file, fh, p);
1563 }
1564 
1565 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1566 				struct file *file, void *fh, void *arg)
1567 {
1568 	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1569 }
1570 
1571 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1572 				struct file *file, void *fh, void *arg)
1573 {
1574 	struct v4l2_requestbuffers *p = arg;
1575 	int ret = check_fmt(file, p->type);
1576 
1577 	if (ret)
1578 		return ret;
1579 
1580 	CLEAR_AFTER_FIELD(p, memory);
1581 
1582 	return ops->vidioc_reqbufs(file, fh, p);
1583 }
1584 
1585 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1586 				struct file *file, void *fh, void *arg)
1587 {
1588 	struct v4l2_buffer *p = arg;
1589 	int ret = check_fmt(file, p->type);
1590 
1591 	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1592 }
1593 
1594 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1595 				struct file *file, void *fh, void *arg)
1596 {
1597 	struct v4l2_buffer *p = arg;
1598 	int ret = check_fmt(file, p->type);
1599 
1600 	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1601 }
1602 
1603 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1604 				struct file *file, void *fh, void *arg)
1605 {
1606 	struct v4l2_buffer *p = arg;
1607 	int ret = check_fmt(file, p->type);
1608 
1609 	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1610 }
1611 
1612 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1613 				struct file *file, void *fh, void *arg)
1614 {
1615 	struct v4l2_create_buffers *create = arg;
1616 	int ret = check_fmt(file, create->format.type);
1617 
1618 	if (ret)
1619 		return ret;
1620 
1621 	v4l_sanitize_format(&create->format);
1622 
1623 	ret = ops->vidioc_create_bufs(file, fh, create);
1624 
1625 	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1626 	    create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1627 		create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1628 
1629 	return ret;
1630 }
1631 
1632 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1633 				struct file *file, void *fh, void *arg)
1634 {
1635 	struct v4l2_buffer *b = arg;
1636 	int ret = check_fmt(file, b->type);
1637 
1638 	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1639 }
1640 
1641 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1642 				struct file *file, void *fh, void *arg)
1643 {
1644 	struct v4l2_streamparm *p = arg;
1645 	v4l2_std_id std;
1646 	int ret = check_fmt(file, p->type);
1647 
1648 	if (ret)
1649 		return ret;
1650 	if (ops->vidioc_g_parm)
1651 		return ops->vidioc_g_parm(file, fh, p);
1652 	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1653 	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1654 		return -EINVAL;
1655 	p->parm.capture.readbuffers = 2;
1656 	ret = ops->vidioc_g_std(file, fh, &std);
1657 	if (ret == 0)
1658 		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1659 	return ret;
1660 }
1661 
1662 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1663 				struct file *file, void *fh, void *arg)
1664 {
1665 	struct v4l2_streamparm *p = arg;
1666 	int ret = check_fmt(file, p->type);
1667 
1668 	return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1669 }
1670 
1671 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1672 				struct file *file, void *fh, void *arg)
1673 {
1674 	struct video_device *vfd = video_devdata(file);
1675 	struct v4l2_queryctrl *p = arg;
1676 	struct v4l2_fh *vfh =
1677 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1678 
1679 	if (vfh && vfh->ctrl_handler)
1680 		return v4l2_queryctrl(vfh->ctrl_handler, p);
1681 	if (vfd->ctrl_handler)
1682 		return v4l2_queryctrl(vfd->ctrl_handler, p);
1683 	if (ops->vidioc_queryctrl)
1684 		return ops->vidioc_queryctrl(file, fh, p);
1685 	return -ENOTTY;
1686 }
1687 
1688 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1689 				struct file *file, void *fh, void *arg)
1690 {
1691 	struct video_device *vfd = video_devdata(file);
1692 	struct v4l2_query_ext_ctrl *p = arg;
1693 	struct v4l2_fh *vfh =
1694 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1695 
1696 	if (vfh && vfh->ctrl_handler)
1697 		return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1698 	if (vfd->ctrl_handler)
1699 		return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1700 	if (ops->vidioc_query_ext_ctrl)
1701 		return ops->vidioc_query_ext_ctrl(file, fh, p);
1702 	return -ENOTTY;
1703 }
1704 
1705 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1706 				struct file *file, void *fh, void *arg)
1707 {
1708 	struct video_device *vfd = video_devdata(file);
1709 	struct v4l2_querymenu *p = arg;
1710 	struct v4l2_fh *vfh =
1711 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1712 
1713 	if (vfh && vfh->ctrl_handler)
1714 		return v4l2_querymenu(vfh->ctrl_handler, p);
1715 	if (vfd->ctrl_handler)
1716 		return v4l2_querymenu(vfd->ctrl_handler, p);
1717 	if (ops->vidioc_querymenu)
1718 		return ops->vidioc_querymenu(file, fh, p);
1719 	return -ENOTTY;
1720 }
1721 
1722 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1723 				struct file *file, void *fh, void *arg)
1724 {
1725 	struct video_device *vfd = video_devdata(file);
1726 	struct v4l2_control *p = arg;
1727 	struct v4l2_fh *vfh =
1728 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1729 	struct v4l2_ext_controls ctrls;
1730 	struct v4l2_ext_control ctrl;
1731 
1732 	if (vfh && vfh->ctrl_handler)
1733 		return v4l2_g_ctrl(vfh->ctrl_handler, p);
1734 	if (vfd->ctrl_handler)
1735 		return v4l2_g_ctrl(vfd->ctrl_handler, p);
1736 	if (ops->vidioc_g_ctrl)
1737 		return ops->vidioc_g_ctrl(file, fh, p);
1738 	if (ops->vidioc_g_ext_ctrls == NULL)
1739 		return -ENOTTY;
1740 
1741 	ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1742 	ctrls.count = 1;
1743 	ctrls.controls = &ctrl;
1744 	ctrl.id = p->id;
1745 	ctrl.value = p->value;
1746 	if (check_ext_ctrls(&ctrls, 1)) {
1747 		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1748 
1749 		if (ret == 0)
1750 			p->value = ctrl.value;
1751 		return ret;
1752 	}
1753 	return -EINVAL;
1754 }
1755 
1756 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1757 				struct file *file, void *fh, void *arg)
1758 {
1759 	struct video_device *vfd = video_devdata(file);
1760 	struct v4l2_control *p = arg;
1761 	struct v4l2_fh *vfh =
1762 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1763 	struct v4l2_ext_controls ctrls;
1764 	struct v4l2_ext_control ctrl;
1765 
1766 	if (vfh && vfh->ctrl_handler)
1767 		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1768 	if (vfd->ctrl_handler)
1769 		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1770 	if (ops->vidioc_s_ctrl)
1771 		return ops->vidioc_s_ctrl(file, fh, p);
1772 	if (ops->vidioc_s_ext_ctrls == NULL)
1773 		return -ENOTTY;
1774 
1775 	ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1776 	ctrls.count = 1;
1777 	ctrls.controls = &ctrl;
1778 	ctrl.id = p->id;
1779 	ctrl.value = p->value;
1780 	if (check_ext_ctrls(&ctrls, 1))
1781 		return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1782 	return -EINVAL;
1783 }
1784 
1785 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1786 				struct file *file, void *fh, void *arg)
1787 {
1788 	struct video_device *vfd = video_devdata(file);
1789 	struct v4l2_ext_controls *p = arg;
1790 	struct v4l2_fh *vfh =
1791 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1792 
1793 	p->error_idx = p->count;
1794 	if (vfh && vfh->ctrl_handler)
1795 		return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1796 	if (vfd->ctrl_handler)
1797 		return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1798 	if (ops->vidioc_g_ext_ctrls == NULL)
1799 		return -ENOTTY;
1800 	return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1801 					-EINVAL;
1802 }
1803 
1804 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1805 				struct file *file, void *fh, void *arg)
1806 {
1807 	struct video_device *vfd = video_devdata(file);
1808 	struct v4l2_ext_controls *p = arg;
1809 	struct v4l2_fh *vfh =
1810 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1811 
1812 	p->error_idx = p->count;
1813 	if (vfh && vfh->ctrl_handler)
1814 		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1815 	if (vfd->ctrl_handler)
1816 		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1817 	if (ops->vidioc_s_ext_ctrls == NULL)
1818 		return -ENOTTY;
1819 	return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1820 					-EINVAL;
1821 }
1822 
1823 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1824 				struct file *file, void *fh, void *arg)
1825 {
1826 	struct video_device *vfd = video_devdata(file);
1827 	struct v4l2_ext_controls *p = arg;
1828 	struct v4l2_fh *vfh =
1829 		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1830 
1831 	p->error_idx = p->count;
1832 	if (vfh && vfh->ctrl_handler)
1833 		return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1834 	if (vfd->ctrl_handler)
1835 		return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1836 	if (ops->vidioc_try_ext_ctrls == NULL)
1837 		return -ENOTTY;
1838 	return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1839 					-EINVAL;
1840 }
1841 
1842 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1843 				struct file *file, void *fh, void *arg)
1844 {
1845 	struct v4l2_crop *p = arg;
1846 	struct v4l2_selection s = {
1847 		.type = p->type,
1848 	};
1849 	int ret;
1850 
1851 	if (ops->vidioc_g_crop)
1852 		return ops->vidioc_g_crop(file, fh, p);
1853 	/* simulate capture crop using selection api */
1854 
1855 	/* crop means compose for output devices */
1856 	if (V4L2_TYPE_IS_OUTPUT(p->type))
1857 		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1858 	else
1859 		s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1860 
1861 	ret = ops->vidioc_g_selection(file, fh, &s);
1862 
1863 	/* copying results to old structure on success */
1864 	if (!ret)
1865 		p->c = s.r;
1866 	return ret;
1867 }
1868 
1869 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1870 				struct file *file, void *fh, void *arg)
1871 {
1872 	struct v4l2_crop *p = arg;
1873 	struct v4l2_selection s = {
1874 		.type = p->type,
1875 		.r = p->c,
1876 	};
1877 
1878 	if (ops->vidioc_s_crop)
1879 		return ops->vidioc_s_crop(file, fh, p);
1880 	/* simulate capture crop using selection api */
1881 
1882 	/* crop means compose for output devices */
1883 	if (V4L2_TYPE_IS_OUTPUT(p->type))
1884 		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1885 	else
1886 		s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1887 
1888 	return ops->vidioc_s_selection(file, fh, &s);
1889 }
1890 
1891 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1892 				struct file *file, void *fh, void *arg)
1893 {
1894 	struct v4l2_cropcap *p = arg;
1895 
1896 	if (ops->vidioc_g_selection) {
1897 		struct v4l2_selection s = { .type = p->type };
1898 		int ret;
1899 
1900 		/* obtaining bounds */
1901 		if (V4L2_TYPE_IS_OUTPUT(p->type))
1902 			s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1903 		else
1904 			s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1905 
1906 		ret = ops->vidioc_g_selection(file, fh, &s);
1907 		if (ret)
1908 			return ret;
1909 		p->bounds = s.r;
1910 
1911 		/* obtaining defrect */
1912 		if (V4L2_TYPE_IS_OUTPUT(p->type))
1913 			s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1914 		else
1915 			s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1916 
1917 		ret = ops->vidioc_g_selection(file, fh, &s);
1918 		if (ret)
1919 			return ret;
1920 		p->defrect = s.r;
1921 	}
1922 
1923 	/* setting trivial pixelaspect */
1924 	p->pixelaspect.numerator = 1;
1925 	p->pixelaspect.denominator = 1;
1926 
1927 	if (ops->vidioc_cropcap)
1928 		return ops->vidioc_cropcap(file, fh, p);
1929 
1930 	return 0;
1931 }
1932 
1933 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1934 				struct file *file, void *fh, void *arg)
1935 {
1936 	struct video_device *vfd = video_devdata(file);
1937 	int ret;
1938 
1939 	if (vfd->v4l2_dev)
1940 		pr_info("%s: =================  START STATUS  =================\n",
1941 			vfd->v4l2_dev->name);
1942 	ret = ops->vidioc_log_status(file, fh);
1943 	if (vfd->v4l2_dev)
1944 		pr_info("%s: ==================  END STATUS  ==================\n",
1945 			vfd->v4l2_dev->name);
1946 	return ret;
1947 }
1948 
1949 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1950 				struct file *file, void *fh, void *arg)
1951 {
1952 #ifdef CONFIG_VIDEO_ADV_DEBUG
1953 	struct v4l2_dbg_register *p = arg;
1954 	struct video_device *vfd = video_devdata(file);
1955 	struct v4l2_subdev *sd;
1956 	int idx = 0;
1957 
1958 	if (!capable(CAP_SYS_ADMIN))
1959 		return -EPERM;
1960 	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1961 		if (vfd->v4l2_dev == NULL)
1962 			return -EINVAL;
1963 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1964 			if (p->match.addr == idx++)
1965 				return v4l2_subdev_call(sd, core, g_register, p);
1966 		return -EINVAL;
1967 	}
1968 	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1969 	    (ops->vidioc_g_chip_info || p->match.addr == 0))
1970 		return ops->vidioc_g_register(file, fh, p);
1971 	return -EINVAL;
1972 #else
1973 	return -ENOTTY;
1974 #endif
1975 }
1976 
1977 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1978 				struct file *file, void *fh, void *arg)
1979 {
1980 #ifdef CONFIG_VIDEO_ADV_DEBUG
1981 	const struct v4l2_dbg_register *p = arg;
1982 	struct video_device *vfd = video_devdata(file);
1983 	struct v4l2_subdev *sd;
1984 	int idx = 0;
1985 
1986 	if (!capable(CAP_SYS_ADMIN))
1987 		return -EPERM;
1988 	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1989 		if (vfd->v4l2_dev == NULL)
1990 			return -EINVAL;
1991 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1992 			if (p->match.addr == idx++)
1993 				return v4l2_subdev_call(sd, core, s_register, p);
1994 		return -EINVAL;
1995 	}
1996 	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1997 	    (ops->vidioc_g_chip_info || p->match.addr == 0))
1998 		return ops->vidioc_s_register(file, fh, p);
1999 	return -EINVAL;
2000 #else
2001 	return -ENOTTY;
2002 #endif
2003 }
2004 
2005 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2006 				struct file *file, void *fh, void *arg)
2007 {
2008 #ifdef CONFIG_VIDEO_ADV_DEBUG
2009 	struct video_device *vfd = video_devdata(file);
2010 	struct v4l2_dbg_chip_info *p = arg;
2011 	struct v4l2_subdev *sd;
2012 	int idx = 0;
2013 
2014 	switch (p->match.type) {
2015 	case V4L2_CHIP_MATCH_BRIDGE:
2016 		if (ops->vidioc_s_register)
2017 			p->flags |= V4L2_CHIP_FL_WRITABLE;
2018 		if (ops->vidioc_g_register)
2019 			p->flags |= V4L2_CHIP_FL_READABLE;
2020 		strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2021 		if (ops->vidioc_g_chip_info)
2022 			return ops->vidioc_g_chip_info(file, fh, arg);
2023 		if (p->match.addr)
2024 			return -EINVAL;
2025 		return 0;
2026 
2027 	case V4L2_CHIP_MATCH_SUBDEV:
2028 		if (vfd->v4l2_dev == NULL)
2029 			break;
2030 		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2031 			if (p->match.addr != idx++)
2032 				continue;
2033 			if (sd->ops->core && sd->ops->core->s_register)
2034 				p->flags |= V4L2_CHIP_FL_WRITABLE;
2035 			if (sd->ops->core && sd->ops->core->g_register)
2036 				p->flags |= V4L2_CHIP_FL_READABLE;
2037 			strlcpy(p->name, sd->name, sizeof(p->name));
2038 			return 0;
2039 		}
2040 		break;
2041 	}
2042 	return -EINVAL;
2043 #else
2044 	return -ENOTTY;
2045 #endif
2046 }
2047 
2048 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2049 				struct file *file, void *fh, void *arg)
2050 {
2051 	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2052 }
2053 
2054 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2055 				struct file *file, void *fh, void *arg)
2056 {
2057 	return ops->vidioc_subscribe_event(fh, arg);
2058 }
2059 
2060 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2061 				struct file *file, void *fh, void *arg)
2062 {
2063 	return ops->vidioc_unsubscribe_event(fh, arg);
2064 }
2065 
2066 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2067 				struct file *file, void *fh, void *arg)
2068 {
2069 	struct v4l2_sliced_vbi_cap *p = arg;
2070 	int ret = check_fmt(file, p->type);
2071 
2072 	if (ret)
2073 		return ret;
2074 
2075 	/* Clear up to type, everything after type is zeroed already */
2076 	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2077 
2078 	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2079 }
2080 
2081 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2082 				struct file *file, void *fh, void *arg)
2083 {
2084 	struct video_device *vfd = video_devdata(file);
2085 	struct v4l2_frequency_band *p = arg;
2086 	enum v4l2_tuner_type type;
2087 	int err;
2088 
2089 	if (vfd->vfl_type == VFL_TYPE_SDR) {
2090 		if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
2091 			return -EINVAL;
2092 		type = p->type;
2093 	} else {
2094 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2095 				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2096 		if (type != p->type)
2097 			return -EINVAL;
2098 	}
2099 	if (ops->vidioc_enum_freq_bands) {
2100 		err = ops->vidioc_enum_freq_bands(file, fh, p);
2101 		if (err != -ENOTTY)
2102 			return err;
2103 	}
2104 	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2105 		struct v4l2_tuner t = {
2106 			.index = p->tuner,
2107 			.type = type,
2108 		};
2109 
2110 		if (p->index)
2111 			return -EINVAL;
2112 		err = ops->vidioc_g_tuner(file, fh, &t);
2113 		if (err)
2114 			return err;
2115 		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2116 		p->rangelow = t.rangelow;
2117 		p->rangehigh = t.rangehigh;
2118 		p->modulation = (type == V4L2_TUNER_RADIO) ?
2119 			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2120 		return 0;
2121 	}
2122 	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2123 		struct v4l2_modulator m = {
2124 			.index = p->tuner,
2125 		};
2126 
2127 		if (type != V4L2_TUNER_RADIO)
2128 			return -EINVAL;
2129 		if (p->index)
2130 			return -EINVAL;
2131 		err = ops->vidioc_g_modulator(file, fh, &m);
2132 		if (err)
2133 			return err;
2134 		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2135 		p->rangelow = m.rangelow;
2136 		p->rangehigh = m.rangehigh;
2137 		p->modulation = (type == V4L2_TUNER_RADIO) ?
2138 			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2139 		return 0;
2140 	}
2141 	return -ENOTTY;
2142 }
2143 
2144 struct v4l2_ioctl_info {
2145 	unsigned int ioctl;
2146 	u32 flags;
2147 	const char * const name;
2148 	union {
2149 		u32 offset;
2150 		int (*func)(const struct v4l2_ioctl_ops *ops,
2151 				struct file *file, void *fh, void *p);
2152 	} u;
2153 	void (*debug)(const void *arg, bool write_only);
2154 };
2155 
2156 /* This control needs a priority check */
2157 #define INFO_FL_PRIO	(1 << 0)
2158 /* This control can be valid if the filehandle passes a control handler. */
2159 #define INFO_FL_CTRL	(1 << 1)
2160 /* This is a standard ioctl, no need for special code */
2161 #define INFO_FL_STD	(1 << 2)
2162 /* This is ioctl has its own function */
2163 #define INFO_FL_FUNC	(1 << 3)
2164 /* Queuing ioctl */
2165 #define INFO_FL_QUEUE	(1 << 4)
2166 /* Zero struct from after the field to the end */
2167 #define INFO_FL_CLEAR(v4l2_struct, field)			\
2168 	((offsetof(struct v4l2_struct, field) +			\
2169 	  sizeof(((struct v4l2_struct *)0)->field)) << 16)
2170 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2171 
2172 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)			\
2173 	[_IOC_NR(_ioctl)] = {						\
2174 		.ioctl = _ioctl,					\
2175 		.flags = _flags | INFO_FL_STD,				\
2176 		.name = #_ioctl,					\
2177 		.u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),	\
2178 		.debug = _debug,					\
2179 	}
2180 
2181 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)			\
2182 	[_IOC_NR(_ioctl)] = {						\
2183 		.ioctl = _ioctl,					\
2184 		.flags = _flags | INFO_FL_FUNC,				\
2185 		.name = #_ioctl,					\
2186 		.u.func = _func,					\
2187 		.debug = _debug,					\
2188 	}
2189 
2190 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2191 	IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2192 	IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2193 	IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2194 	IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2195 	IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2196 	IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2197 	IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2198 	IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2199 	IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2200 	IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2201 	IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2202 	IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2203 	IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2204 	IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2205 	IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2206 	IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2207 	IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2208 	IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2209 	IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2210 	IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2211 	IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2212 	IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2213 	IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2214 	IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2215 	IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2216 	IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2217 	IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2218 	IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2219 	IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2220 	IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2221 	IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2222 	IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2223 	IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2224 	IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2225 	IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2226 	IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2227 	IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2228 	IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2229 	IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2230 	IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2231 	IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2232 	IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2233 	IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2234 	IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2235 	IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2236 	IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2237 	IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2238 	IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2239 	IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2240 	IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2241 	IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2242 	IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2243 	IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2244 	IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2245 	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)),
2246 	IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2247 	IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2248 	IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2249 	IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2250 	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2251 	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2252 	IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2253 	IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2254 	IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2255 	IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2256 	IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2257 	IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2258 	IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2259 	IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2260 	IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2261 	IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2262 	IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2263 	IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2264 	IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2265 	IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2266 	IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2267 	IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2268 	IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2269 	IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2270 	IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2271 	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)),
2272 	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)),
2273 };
2274 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2275 
2276 bool v4l2_is_known_ioctl(unsigned int cmd)
2277 {
2278 	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2279 		return false;
2280 	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2281 }
2282 
2283 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2284 {
2285 	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2286 		return vdev->lock;
2287 	if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2288 		return NULL;
2289 	if (vdev->queue && vdev->queue->lock &&
2290 			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2291 		return vdev->queue->lock;
2292 	return vdev->lock;
2293 }
2294 
2295 /* Common ioctl debug function. This function can be used by
2296    external ioctl messages as well as internal V4L ioctl */
2297 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2298 {
2299 	const char *dir, *type;
2300 
2301 	if (prefix)
2302 		printk(KERN_DEBUG "%s: ", prefix);
2303 
2304 	switch (_IOC_TYPE(cmd)) {
2305 	case 'd':
2306 		type = "v4l2_int";
2307 		break;
2308 	case 'V':
2309 		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2310 			type = "v4l2";
2311 			break;
2312 		}
2313 		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2314 		return;
2315 	default:
2316 		type = "unknown";
2317 		break;
2318 	}
2319 
2320 	switch (_IOC_DIR(cmd)) {
2321 	case _IOC_NONE:              dir = "--"; break;
2322 	case _IOC_READ:              dir = "r-"; break;
2323 	case _IOC_WRITE:             dir = "-w"; break;
2324 	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2325 	default:                     dir = "*ERR*"; break;
2326 	}
2327 	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2328 		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2329 }
2330 EXPORT_SYMBOL(v4l_printk_ioctl);
2331 
2332 static long __video_do_ioctl(struct file *file,
2333 		unsigned int cmd, void *arg)
2334 {
2335 	struct video_device *vfd = video_devdata(file);
2336 	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2337 	bool write_only = false;
2338 	struct v4l2_ioctl_info default_info;
2339 	const struct v4l2_ioctl_info *info;
2340 	void *fh = file->private_data;
2341 	struct v4l2_fh *vfh = NULL;
2342 	int dev_debug = vfd->dev_debug;
2343 	long ret = -ENOTTY;
2344 
2345 	if (ops == NULL) {
2346 		pr_warn("%s: has no ioctl_ops.\n",
2347 				video_device_node_name(vfd));
2348 		return ret;
2349 	}
2350 
2351 	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2352 		vfh = file->private_data;
2353 
2354 	if (v4l2_is_known_ioctl(cmd)) {
2355 		info = &v4l2_ioctls[_IOC_NR(cmd)];
2356 
2357 	        if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2358 		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2359 			goto done;
2360 
2361 		if (vfh && (info->flags & INFO_FL_PRIO)) {
2362 			ret = v4l2_prio_check(vfd->prio, vfh->prio);
2363 			if (ret)
2364 				goto done;
2365 		}
2366 	} else {
2367 		default_info.ioctl = cmd;
2368 		default_info.flags = 0;
2369 		default_info.debug = v4l_print_default;
2370 		info = &default_info;
2371 	}
2372 
2373 	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2374 	if (info->flags & INFO_FL_STD) {
2375 		typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2376 		const void *p = vfd->ioctl_ops;
2377 		const vidioc_op *vidioc = p + info->u.offset;
2378 
2379 		ret = (*vidioc)(file, fh, arg);
2380 	} else if (info->flags & INFO_FL_FUNC) {
2381 		ret = info->u.func(ops, file, fh, arg);
2382 	} else if (!ops->vidioc_default) {
2383 		ret = -ENOTTY;
2384 	} else {
2385 		ret = ops->vidioc_default(file, fh,
2386 			vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2387 			cmd, arg);
2388 	}
2389 
2390 done:
2391 	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2392 		if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2393 		    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2394 			return ret;
2395 
2396 		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2397 		if (ret < 0)
2398 			pr_cont(": error %ld", ret);
2399 		if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2400 			pr_cont("\n");
2401 		else if (_IOC_DIR(cmd) == _IOC_NONE)
2402 			info->debug(arg, write_only);
2403 		else {
2404 			pr_cont(": ");
2405 			info->debug(arg, write_only);
2406 		}
2407 	}
2408 
2409 	return ret;
2410 }
2411 
2412 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2413 			    void __user **user_ptr, void ***kernel_ptr)
2414 {
2415 	int ret = 0;
2416 
2417 	switch (cmd) {
2418 	case VIDIOC_PREPARE_BUF:
2419 	case VIDIOC_QUERYBUF:
2420 	case VIDIOC_QBUF:
2421 	case VIDIOC_DQBUF: {
2422 		struct v4l2_buffer *buf = parg;
2423 
2424 		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2425 			if (buf->length > VIDEO_MAX_PLANES) {
2426 				ret = -EINVAL;
2427 				break;
2428 			}
2429 			*user_ptr = (void __user *)buf->m.planes;
2430 			*kernel_ptr = (void **)&buf->m.planes;
2431 			*array_size = sizeof(struct v4l2_plane) * buf->length;
2432 			ret = 1;
2433 		}
2434 		break;
2435 	}
2436 
2437 	case VIDIOC_G_EDID:
2438 	case VIDIOC_S_EDID: {
2439 		struct v4l2_edid *edid = parg;
2440 
2441 		if (edid->blocks) {
2442 			if (edid->blocks > 256) {
2443 				ret = -EINVAL;
2444 				break;
2445 			}
2446 			*user_ptr = (void __user *)edid->edid;
2447 			*kernel_ptr = (void **)&edid->edid;
2448 			*array_size = edid->blocks * 128;
2449 			ret = 1;
2450 		}
2451 		break;
2452 	}
2453 
2454 	case VIDIOC_S_EXT_CTRLS:
2455 	case VIDIOC_G_EXT_CTRLS:
2456 	case VIDIOC_TRY_EXT_CTRLS: {
2457 		struct v4l2_ext_controls *ctrls = parg;
2458 
2459 		if (ctrls->count != 0) {
2460 			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2461 				ret = -EINVAL;
2462 				break;
2463 			}
2464 			*user_ptr = (void __user *)ctrls->controls;
2465 			*kernel_ptr = (void **)&ctrls->controls;
2466 			*array_size = sizeof(struct v4l2_ext_control)
2467 				    * ctrls->count;
2468 			ret = 1;
2469 		}
2470 		break;
2471 	}
2472 	}
2473 
2474 	return ret;
2475 }
2476 
2477 long
2478 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2479 	       v4l2_kioctl func)
2480 {
2481 	char	sbuf[128];
2482 	void    *mbuf = NULL;
2483 	void	*parg = (void *)arg;
2484 	long	err  = -EINVAL;
2485 	bool	has_array_args;
2486 	size_t  array_size = 0;
2487 	void __user *user_ptr = NULL;
2488 	void	**kernel_ptr = NULL;
2489 
2490 	/*  Copy arguments into temp kernel buffer  */
2491 	if (_IOC_DIR(cmd) != _IOC_NONE) {
2492 		if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2493 			parg = sbuf;
2494 		} else {
2495 			/* too big to allocate from stack */
2496 			mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2497 			if (NULL == mbuf)
2498 				return -ENOMEM;
2499 			parg = mbuf;
2500 		}
2501 
2502 		err = -EFAULT;
2503 		if (_IOC_DIR(cmd) & _IOC_WRITE) {
2504 			unsigned int n = _IOC_SIZE(cmd);
2505 
2506 			/*
2507 			 * In some cases, only a few fields are used as input,
2508 			 * i.e. when the app sets "index" and then the driver
2509 			 * fills in the rest of the structure for the thing
2510 			 * with that index.  We only need to copy up the first
2511 			 * non-input field.
2512 			 */
2513 			if (v4l2_is_known_ioctl(cmd)) {
2514 				u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2515 				if (flags & INFO_FL_CLEAR_MASK)
2516 					n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2517 			}
2518 
2519 			if (copy_from_user(parg, (void __user *)arg, n))
2520 				goto out;
2521 
2522 			/* zero out anything we don't copy from userspace */
2523 			if (n < _IOC_SIZE(cmd))
2524 				memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2525 		} else {
2526 			/* read-only ioctl */
2527 			memset(parg, 0, _IOC_SIZE(cmd));
2528 		}
2529 	}
2530 
2531 	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2532 	if (err < 0)
2533 		goto out;
2534 	has_array_args = err;
2535 
2536 	if (has_array_args) {
2537 		/*
2538 		 * When adding new types of array args, make sure that the
2539 		 * parent argument to ioctl (which contains the pointer to the
2540 		 * array) fits into sbuf (so that mbuf will still remain
2541 		 * unused up to here).
2542 		 */
2543 		mbuf = kmalloc(array_size, GFP_KERNEL);
2544 		err = -ENOMEM;
2545 		if (NULL == mbuf)
2546 			goto out_array_args;
2547 		err = -EFAULT;
2548 		if (copy_from_user(mbuf, user_ptr, array_size))
2549 			goto out_array_args;
2550 		*kernel_ptr = mbuf;
2551 	}
2552 
2553 	/* Handles IOCTL */
2554 	err = func(file, cmd, parg);
2555 	if (err == -ENOIOCTLCMD)
2556 		err = -ENOTTY;
2557 	if (err == 0) {
2558 		if (cmd == VIDIOC_DQBUF)
2559 			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2560 		else if (cmd == VIDIOC_QBUF)
2561 			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2562 	}
2563 
2564 	if (has_array_args) {
2565 		*kernel_ptr = (void __force *)user_ptr;
2566 		if (copy_to_user(user_ptr, mbuf, array_size))
2567 			err = -EFAULT;
2568 		goto out_array_args;
2569 	}
2570 	/* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2571 	   results that must be returned. */
2572 	if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2573 		goto out;
2574 
2575 out_array_args:
2576 	/*  Copy results into user buffer  */
2577 	switch (_IOC_DIR(cmd)) {
2578 	case _IOC_READ:
2579 	case (_IOC_WRITE | _IOC_READ):
2580 		if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2581 			err = -EFAULT;
2582 		break;
2583 	}
2584 
2585 out:
2586 	kfree(mbuf);
2587 	return err;
2588 }
2589 EXPORT_SYMBOL(video_usercopy);
2590 
2591 long video_ioctl2(struct file *file,
2592 	       unsigned int cmd, unsigned long arg)
2593 {
2594 	return video_usercopy(file, cmd, arg, __video_do_ioctl);
2595 }
2596 EXPORT_SYMBOL(video_ioctl2);
2597