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[media] Documentation/DocBook/media/v4l: fix typo, s/packet/packed/
[linux-2.6-block.git] / drivers / media / v4l2-core / v4l2-ioctl.c
CommitLineData
35ea11ff
HV		 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 *
d9b01449 11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
35ea11ff
HV		 12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13 */
14
15#include <linux/module.h>
5a0e3ad6 16#include <linux/slab.h>
35ea11ff
HV		 17#include <linux/types.h>
18#include <linux/kernel.h>
ae6db515 19#include <linux/version.h>
35ea11ff 20
35ea11ff
HV		 21#include <linux/videodev2.h>
22
35ea11ff
HV		 23#include <media/v4l2-common.h>
24#include <media/v4l2-ioctl.h>
11bbc1ca 25#include <media/v4l2-ctrls.h>
d3d7c963
SA		 26#include <media/v4l2-fh.h>
27#include <media/v4l2-event.h>
99cd47bc 28#include <media/v4l2-device.h>
5a5adf6b 29#include <media/videobuf2-core.h>
35ea11ff 30
25985edc 31/* Zero out the end of the struct pointed to by p. Everything after, but
7ecc0cf9
TP		 32 * not including, the specified field is cleared. */
33#define CLEAR_AFTER_FIELD(p, field) \
34 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
35 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
36
73f35418
HV		 37#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
38
35ea11ff
HV		 39struct std_descr {
40 v4l2_std_id std;
41 const char *descr;
42};
43
44static const struct std_descr standards[] = {
45 { V4L2_STD_NTSC, "NTSC" },
46 { V4L2_STD_NTSC_M, "NTSC-M" },
47 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
48 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
49 { V4L2_STD_NTSC_443, "NTSC-443" },
50 { V4L2_STD_PAL, "PAL" },
51 { V4L2_STD_PAL_BG, "PAL-BG" },
52 { V4L2_STD_PAL_B, "PAL-B" },
53 { V4L2_STD_PAL_B1, "PAL-B1" },
54 { V4L2_STD_PAL_G, "PAL-G" },
55 { V4L2_STD_PAL_H, "PAL-H" },
56 { V4L2_STD_PAL_I, "PAL-I" },
57 { V4L2_STD_PAL_DK, "PAL-DK" },
58 { V4L2_STD_PAL_D, "PAL-D" },
59 { V4L2_STD_PAL_D1, "PAL-D1" },
60 { V4L2_STD_PAL_K, "PAL-K" },
61 { V4L2_STD_PAL_M, "PAL-M" },
62 { V4L2_STD_PAL_N, "PAL-N" },
63 { V4L2_STD_PAL_Nc, "PAL-Nc" },
64 { V4L2_STD_PAL_60, "PAL-60" },
65 { V4L2_STD_SECAM, "SECAM" },
66 { V4L2_STD_SECAM_B, "SECAM-B" },
67 { V4L2_STD_SECAM_G, "SECAM-G" },
68 { V4L2_STD_SECAM_H, "SECAM-H" },
69 { V4L2_STD_SECAM_DK, "SECAM-DK" },
70 { V4L2_STD_SECAM_D, "SECAM-D" },
71 { V4L2_STD_SECAM_K, "SECAM-K" },
72 { V4L2_STD_SECAM_K1, "SECAM-K1" },
73 { V4L2_STD_SECAM_L, "SECAM-L" },
74 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
75 { 0, "Unknown" }
76};
77
78/* video4linux standard ID conversion to standard name
79 */
80const char *v4l2_norm_to_name(v4l2_std_id id)
81{
82 u32 myid = id;
83 int i;
84
85 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
86 64 bit comparations. So, on that architecture, with some gcc
87 variants, compilation fails. Currently, the max value is 30bit wide.
88 */
89 BUG_ON(myid != id);
90
91 for (i = 0; standards[i].std; i++)
92 if (myid == standards[i].std)
93 break;
94 return standards[i].descr;
95}
96EXPORT_SYMBOL(v4l2_norm_to_name);
97
51f0b8d5
TP		 98/* Returns frame period for the given standard */
99void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
100{
101 if (id & V4L2_STD_525_60) {
102 frameperiod->numerator = 1001;
103 frameperiod->denominator = 30000;
104 } else {
105 frameperiod->numerator = 1;
106 frameperiod->denominator = 25;
107 }
108}
109EXPORT_SYMBOL(v4l2_video_std_frame_period);
110
35ea11ff
HV		 111/* Fill in the fields of a v4l2_standard structure according to the
112 'id' and 'transmission' parameters. Returns negative on error. */
113int v4l2_video_std_construct(struct v4l2_standard *vs,
114 int id, const char *name)
115{
51f0b8d5
TP		 116 vs->id = id;
117 v4l2_video_std_frame_period(id, &vs->frameperiod);
118 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
35ea11ff
HV		 119 strlcpy(vs->name, name, sizeof(vs->name));
120 return 0;
121}
122EXPORT_SYMBOL(v4l2_video_std_construct);
123
124/* ----------------------------------------------------------------- */
125/* some arrays for pretty-printing debug messages of enum types */
126
127const char *v4l2_field_names[] = {
128 [V4L2_FIELD_ANY] = "any",
129 [V4L2_FIELD_NONE] = "none",
130 [V4L2_FIELD_TOP] = "top",
131 [V4L2_FIELD_BOTTOM] = "bottom",
132 [V4L2_FIELD_INTERLACED] = "interlaced",
133 [V4L2_FIELD_SEQ_TB] = "seq-tb",
134 [V4L2_FIELD_SEQ_BT] = "seq-bt",
135 [V4L2_FIELD_ALTERNATE] = "alternate",
136 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
137 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
138};
139EXPORT_SYMBOL(v4l2_field_names);
140
141const char *v4l2_type_names[] = {
142 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
143 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
144 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
145 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
146 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
147 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
148 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
149 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
f8f3914c
PO		 150 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
151 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
35ea11ff
HV		 152};
153EXPORT_SYMBOL(v4l2_type_names);
154
155static const char *v4l2_memory_names[] = {
156 [V4L2_MEMORY_MMAP] = "mmap",
157 [V4L2_MEMORY_USERPTR] = "userptr",
158 [V4L2_MEMORY_OVERLAY] = "overlay",
051c7788 159 [V4L2_MEMORY_DMABUF] = "dmabuf",
35ea11ff
HV		 160};
161
d9246240 162#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
35ea11ff
HV		 163
164/* ------------------------------------------------------------------ */
165/* debug help functions */
8ab75e3e 166
59076122
HV		 167static void v4l_print_querycap(const void *arg, bool write_only)
168{
169 const struct v4l2_capability *p = arg;
170
27d5a87c 171 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
59076122 172 "capabilities=0x%08x, device_caps=0x%08x\n",
27d5a87c
HV		 173 (int)sizeof(p->driver), p->driver,
174 (int)sizeof(p->card), p->card,
175 (int)sizeof(p->bus_info), p->bus_info,
59076122
HV		 176 p->version, p->capabilities, p->device_caps);
177}
178
179static void v4l_print_enuminput(const void *arg, bool write_only)
180{
181 const struct v4l2_input *p = arg;
182
27d5a87c 183 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
59076122 184 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
27d5a87c
HV		 185 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
186 p->tuner, (unsigned long long)p->std, p->status,
187 p->capabilities);
59076122
HV		 188}
189
190static void v4l_print_enumoutput(const void *arg, bool write_only)
191{
192 const struct v4l2_output *p = arg;
193
27d5a87c 194 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
59076122 195 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
27d5a87c
HV		 196 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
197 p->modulator, (unsigned long long)p->std, p->capabilities);
59076122
HV		 198}
199
200static void v4l_print_audio(const void *arg, bool write_only)
201{
202 const struct v4l2_audio *p = arg;
203
204 if (write_only)
205 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
206 else
27d5a87c
HV		 207 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
208 p->index, (int)sizeof(p->name), p->name,
209 p->capability, p->mode);
59076122
HV		 210}
211
212static void v4l_print_audioout(const void *arg, bool write_only)
213{
214 const struct v4l2_audioout *p = arg;
215
216 if (write_only)
217 pr_cont("index=%u\n", p->index);
218 else
27d5a87c
HV		 219 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
220 p->index, (int)sizeof(p->name), p->name,
221 p->capability, p->mode);
59076122
HV		 222}
223
be6c64e4
HV		 224static void v4l_print_fmtdesc(const void *arg, bool write_only)
225{
226 const struct v4l2_fmtdesc *p = arg;
227
27d5a87c 228 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
be6c64e4
HV		 229 p->index, prt_names(p->type, v4l2_type_names),
230 p->flags, (p->pixelformat & 0xff),
231 (p->pixelformat >> 8) & 0xff,
232 (p->pixelformat >> 16) & 0xff,
233 (p->pixelformat >> 24) & 0xff,
27d5a87c 234 (int)sizeof(p->description), p->description);
be6c64e4
HV		 235}
236
237static void v4l_print_format(const void *arg, bool write_only)
238{
239 const struct v4l2_format *p = arg;
240 const struct v4l2_pix_format *pix;
241 const struct v4l2_pix_format_mplane *mp;
242 const struct v4l2_vbi_format *vbi;
243 const struct v4l2_sliced_vbi_format *sliced;
244 const struct v4l2_window *win;
be6c64e4
HV		 245 unsigned i;
246
247 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
248 switch (p->type) {
249 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
250 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
251 pix = &p->fmt.pix;
252 pr_cont(", width=%u, height=%u, "
253 "pixelformat=%c%c%c%c, field=%s, "
560dde24 254 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
be6c64e4
HV		 255 pix->width, pix->height,
256 (pix->pixelformat & 0xff),
257 (pix->pixelformat >> 8) & 0xff,
258 (pix->pixelformat >> 16) & 0xff,
259 (pix->pixelformat >> 24) & 0xff,
260 prt_names(pix->field, v4l2_field_names),
261 pix->bytesperline, pix->sizeimage,
262 pix->colorspace);
263 break;
264 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
265 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
266 mp = &p->fmt.pix_mp;
267 pr_cont(", width=%u, height=%u, "
268 "format=%c%c%c%c, field=%s, "
269 "colorspace=%d, num_planes=%u\n",
270 mp->width, mp->height,
271 (mp->pixelformat & 0xff),
272 (mp->pixelformat >> 8) & 0xff,
273 (mp->pixelformat >> 16) & 0xff,
274 (mp->pixelformat >> 24) & 0xff,
275 prt_names(mp->field, v4l2_field_names),
276 mp->colorspace, mp->num_planes);
277 for (i = 0; i < mp->num_planes; i++)
278 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
279 mp->plane_fmt[i].bytesperline,
280 mp->plane_fmt[i].sizeimage);
281 break;
282 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
283 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
284 win = &p->fmt.win;
560dde24
HV		 285 /* Note: we can't print the clip list here since the clips
286 * pointer is a userspace pointer, not a kernelspace
287 * pointer. */
288 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",
289 win->w.width, win->w.height, win->w.left, win->w.top,
be6c64e4 290 prt_names(win->field, v4l2_field_names),
560dde24
HV		 291 win->chromakey, win->clipcount, win->clips,
292 win->bitmap, win->global_alpha);
be6c64e4
HV		 293 break;
294 case V4L2_BUF_TYPE_VBI_CAPTURE:
295 case V4L2_BUF_TYPE_VBI_OUTPUT:
296 vbi = &p->fmt.vbi;
297 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
298 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
299 vbi->sampling_rate, vbi->offset,
300 vbi->samples_per_line,
301 (vbi->sample_format & 0xff),
302 (vbi->sample_format >> 8) & 0xff,
303 (vbi->sample_format >> 16) & 0xff,
304 (vbi->sample_format >> 24) & 0xff,
305 vbi->start[0], vbi->start[1],
306 vbi->count[0], vbi->count[1]);
307 break;
308 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
309 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
310 sliced = &p->fmt.sliced;
311 pr_cont(", service_set=0x%08x, io_size=%d\n",
312 sliced->service_set, sliced->io_size);
313 for (i = 0; i < 24; i++)
314 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
315 sliced->service_lines[0][i],
316 sliced->service_lines[1][i]);
317 break;
be6c64e4
HV		 318 }
319}
320
321static void v4l_print_framebuffer(const void *arg, bool write_only)
322{
323 const struct v4l2_framebuffer *p = arg;
324
325 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
326 "height=%u, pixelformat=%c%c%c%c, "
560dde24 327 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
be6c64e4
HV		 328 p->capability, p->flags, p->base,
329 p->fmt.width, p->fmt.height,
330 (p->fmt.pixelformat & 0xff),
331 (p->fmt.pixelformat >> 8) & 0xff,
332 (p->fmt.pixelformat >> 16) & 0xff,
333 (p->fmt.pixelformat >> 24) & 0xff,
334 p->fmt.bytesperline, p->fmt.sizeimage,
335 p->fmt.colorspace);
336}
337
e325b244
HV		 338static void v4l_print_buftype(const void *arg, bool write_only)
339{
340 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
341}
342
4b1e2e4d
HV		 343static void v4l_print_modulator(const void *arg, bool write_only)
344{
345 const struct v4l2_modulator *p = arg;
346
347 if (write_only)
560dde24 348 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
4b1e2e4d 349 else
27d5a87c 350 pr_cont("index=%u, name=%.*s, capability=0x%x, "
4b1e2e4d 351 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
27d5a87c 352 p->index, (int)sizeof(p->name), p->name, p->capability,
4b1e2e4d
HV		 353 p->rangelow, p->rangehigh, p->txsubchans);
354}
355
356static void v4l_print_tuner(const void *arg, bool write_only)
357{
358 const struct v4l2_tuner *p = arg;
359
360 if (write_only)
361 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
362 else
27d5a87c 363 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
4b1e2e4d
HV		 364 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
365 "rxsubchans=0x%x, audmode=%u\n",
27d5a87c 366 p->index, (int)sizeof(p->name), p->name, p->type,
4b1e2e4d
HV		 367 p->capability, p->rangelow,
368 p->rangehigh, p->signal, p->afc,
369 p->rxsubchans, p->audmode);
370}
371
372static void v4l_print_frequency(const void *arg, bool write_only)
373{
374 const struct v4l2_frequency *p = arg;
375
376 pr_cont("tuner=%u, type=%u, frequency=%u\n",
377 p->tuner, p->type, p->frequency);
378}
379
380static void v4l_print_standard(const void *arg, bool write_only)
381{
382 const struct v4l2_standard *p = arg;
383
27d5a87c 384 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
4b1e2e4d 385 "framelines=%u\n", p->index,
27d5a87c 386 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
4b1e2e4d
HV		 387 p->frameperiod.numerator,
388 p->frameperiod.denominator,
389 p->framelines);
390}
391
392static void v4l_print_std(const void *arg, bool write_only)
393{
394 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
395}
396
397static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
398{
399 const struct v4l2_hw_freq_seek *p = arg;
400
5e788317
HV		 401 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
402 "rangelow=%u, rangehigh=%u\n",
403 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
404 p->rangelow, p->rangehigh);
4b1e2e4d
HV		 405}
406
eb3728ed 407static void v4l_print_requestbuffers(const void *arg, bool write_only)
59076122 408{
eb3728ed
HV		 409 const struct v4l2_requestbuffers *p = arg;
410
411 pr_cont("count=%d, type=%s, memory=%s\n",
412 p->count,
413 prt_names(p->type, v4l2_type_names),
414 prt_names(p->memory, v4l2_memory_names));
59076122
HV		 415}
416
eb3728ed 417static void v4l_print_buffer(const void *arg, bool write_only)
35ea11ff 418{
eb3728ed
HV		 419 const struct v4l2_buffer *p = arg;
420 const struct v4l2_timecode *tc = &p->timecode;
421 const struct v4l2_plane *plane;
d14e6d76 422 int i;
35ea11ff 423
eb3728ed
HV		 424 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
425 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
35ea11ff
HV		 426 p->timestamp.tv_sec / 3600,
427 (int)(p->timestamp.tv_sec / 60) % 60,
428 (int)(p->timestamp.tv_sec % 60),
b045979d 429 (long)p->timestamp.tv_usec,
35ea11ff
HV		 430 p->index,
431 prt_names(p->type, v4l2_type_names),
eb3728ed
HV		 432 p->flags, prt_names(p->field, v4l2_field_names),
433 p->sequence, prt_names(p->memory, v4l2_memory_names));
d14e6d76
PO		 434
435 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
eb3728ed 436 pr_cont("\n");
d14e6d76
PO		 437 for (i = 0; i < p->length; ++i) {
438 plane = &p->m.planes[i];
eb3728ed 439 printk(KERN_DEBUG
560dde24 440 "plane %d: bytesused=%d, data_offset=0x%08x, "
eb3728ed 441 "offset/userptr=0x%lx, length=%d\n",
d14e6d76
PO		 442 i, plane->bytesused, plane->data_offset,
443 plane->m.userptr, plane->length);
444 }
445 } else {
560dde24 446 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
d14e6d76
PO		 447 p->bytesused, p->m.userptr, p->length);
448 }
449
eb3728ed
HV		 450 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
451 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
35ea11ff
HV		 452 tc->hours, tc->minutes, tc->seconds,
453 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
454}
455
b799d09a
TS		 456static void v4l_print_exportbuffer(const void *arg, bool write_only)
457{
458 const struct v4l2_exportbuffer *p = arg;
459
460 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
461 p->fd, prt_names(p->type, v4l2_type_names),
462 p->index, p->plane, p->flags);
463}
464
eb3728ed
HV		 465static void v4l_print_create_buffers(const void *arg, bool write_only)
466{
467 const struct v4l2_create_buffers *p = arg;
468
469 pr_cont("index=%d, count=%d, memory=%s, ",
470 p->index, p->count,
471 prt_names(p->memory, v4l2_memory_names));
472 v4l_print_format(&p->format, write_only);
473}
474
475static void v4l_print_streamparm(const void *arg, bool write_only)
476{
477 const struct v4l2_streamparm *p = arg;
478
479 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
480
481 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
482 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
483 const struct v4l2_captureparm *c = &p->parm.capture;
484
485 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
486 "extendedmode=%d, readbuffers=%d\n",
487 c->capability, c->capturemode,
488 c->timeperframe.numerator, c->timeperframe.denominator,
489 c->extendedmode, c->readbuffers);
490 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
491 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
492 const struct v4l2_outputparm *c = &p->parm.output;
493
494 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
495 "extendedmode=%d, writebuffers=%d\n",
496 c->capability, c->outputmode,
497 c->timeperframe.numerator, c->timeperframe.denominator,
498 c->extendedmode, c->writebuffers);
560dde24
HV		 499 } else {
500 pr_cont("\n");
eb3728ed
HV		 501 }
502}
503
efbceecd
HV		 504static void v4l_print_queryctrl(const void *arg, bool write_only)
505{
506 const struct v4l2_queryctrl *p = arg;
507
27d5a87c 508 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
efbceecd 509 "step=%d, default=%d, flags=0x%08x\n",
27d5a87c 510 p->id, p->type, (int)sizeof(p->name), p->name,
efbceecd
HV		 511 p->minimum, p->maximum,
512 p->step, p->default_value, p->flags);
513}
514
515static void v4l_print_querymenu(const void *arg, bool write_only)
516{
517 const struct v4l2_querymenu *p = arg;
518
519 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
520}
521
522static void v4l_print_control(const void *arg, bool write_only)
523{
524 const struct v4l2_control *p = arg;
525
526 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
527}
528
529static void v4l_print_ext_controls(const void *arg, bool write_only)
530{
531 const struct v4l2_ext_controls *p = arg;
532 int i;
533
534 pr_cont("class=0x%x, count=%d, error_idx=%d",
535 p->ctrl_class, p->count, p->error_idx);
536 for (i = 0; i < p->count; i++) {
537 if (p->controls[i].size)
538 pr_cont(", id/val=0x%x/0x%x",
539 p->controls[i].id, p->controls[i].value);
540 else
541 pr_cont(", id/size=0x%x/%u",
542 p->controls[i].id, p->controls[i].size);
543 }
544 pr_cont("\n");
545}
546
d84f2d94 547static void v4l_print_cropcap(const void *arg, bool write_only)
eb3728ed 548{
d84f2d94
HV		 549 const struct v4l2_cropcap *p = arg;
550
551 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
552 "defrect wxh=%dx%d, x,y=%d,%d\n, "
553 "pixelaspect %d/%d\n",
554 prt_names(p->type, v4l2_type_names),
555 p->bounds.width, p->bounds.height,
556 p->bounds.left, p->bounds.top,
557 p->defrect.width, p->defrect.height,
558 p->defrect.left, p->defrect.top,
559 p->pixelaspect.numerator, p->pixelaspect.denominator);
eb3728ed
HV		 560}
561
d84f2d94 562static void v4l_print_crop(const void *arg, bool write_only)
35ea11ff 563{
d84f2d94
HV		 564 const struct v4l2_crop *p = arg;
565
566 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
567 prt_names(p->type, v4l2_type_names),
568 p->c.width, p->c.height,
569 p->c.left, p->c.top);
570}
571
572static void v4l_print_selection(const void *arg, bool write_only)
573{
574 const struct v4l2_selection *p = arg;
575
576 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
577 prt_names(p->type, v4l2_type_names),
578 p->target, p->flags,
579 p->r.width, p->r.height, p->r.left, p->r.top);
580}
581
d806f2df
HV		 582static void v4l_print_jpegcompression(const void *arg, bool write_only)
583{
584 const struct v4l2_jpegcompression *p = arg;
585
586 pr_cont("quality=%d, APPn=%d, APP_len=%d, "
587 "COM_len=%d, jpeg_markers=0x%x\n",
588 p->quality, p->APPn, p->APP_len,
589 p->COM_len, p->jpeg_markers);
590}
591
592static void v4l_print_enc_idx(const void *arg, bool write_only)
593{
594 const struct v4l2_enc_idx *p = arg;
595
596 pr_cont("entries=%d, entries_cap=%d\n",
597 p->entries, p->entries_cap);
598}
599
600static void v4l_print_encoder_cmd(const void *arg, bool write_only)
601{
602 const struct v4l2_encoder_cmd *p = arg;
603
604 pr_cont("cmd=%d, flags=0x%x\n",
605 p->cmd, p->flags);
606}
607
608static void v4l_print_decoder_cmd(const void *arg, bool write_only)
609{
610 const struct v4l2_decoder_cmd *p = arg;
611
612 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
613
614 if (p->cmd == V4L2_DEC_CMD_START)
615 pr_info("speed=%d, format=%u\n",
616 p->start.speed, p->start.format);
617 else if (p->cmd == V4L2_DEC_CMD_STOP)
618 pr_info("pts=%llu\n", p->stop.pts);
619}
620
96b03d2a 621static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
79b0c640 622{
96b03d2a 623 const struct v4l2_dbg_chip_info *p = arg;
79b0c640
HV		 624
625 pr_cont("type=%u, ", p->match.type);
3eef2510 626 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
79b0c640
HV		 627 pr_cont("name=%.*s, ",
628 (int)sizeof(p->match.name), p->match.name);
629 else
630 pr_cont("addr=%u, ", p->match.addr);
631 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
632}
633
f16f77b0
HV		 634static void v4l_print_dbg_register(const void *arg, bool write_only)
635{
636 const struct v4l2_dbg_register *p = arg;
637
638 pr_cont("type=%u, ", p->match.type);
3eef2510 639 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
27d5a87c
HV		 640 pr_cont("name=%.*s, ",
641 (int)sizeof(p->match.name), p->match.name);
f16f77b0
HV		 642 else
643 pr_cont("addr=%u, ", p->match.addr);
644 pr_cont("reg=0x%llx, val=0x%llx\n",
645 p->reg, p->val);
646}
647
efc626b0 648static void v4l_print_dv_timings(const void *arg, bool write_only)
5d7758ee 649{
efc626b0
HV		 650 const struct v4l2_dv_timings *p = arg;
651
5d7758ee
HV		 652 switch (p->type) {
653 case V4L2_DV_BT_656_1120:
efc626b0
HV		 654 pr_cont("type=bt-656/1120, interlaced=%u, "
655 "pixelclock=%llu, "
656 "width=%u, height=%u, polarities=0x%x, "
657 "hfrontporch=%u, hsync=%u, "
658 "hbackporch=%u, vfrontporch=%u, "
659 "vsync=%u, vbackporch=%u, "
660 "il_vfrontporch=%u, il_vsync=%u, "
661 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
5d7758ee
HV		 662 p->bt.interlaced, p->bt.pixelclock,
663 p->bt.width, p->bt.height,
664 p->bt.polarities, p->bt.hfrontporch,
665 p->bt.hsync, p->bt.hbackporch,
666 p->bt.vfrontporch, p->bt.vsync,
667 p->bt.vbackporch, p->bt.il_vfrontporch,
668 p->bt.il_vsync, p->bt.il_vbackporch,
669 p->bt.standards, p->bt.flags);
670 break;
671 default:
efc626b0 672 pr_cont("type=%d\n", p->type);
5d7758ee
HV		 673 break;
674 }
675}
676
efc626b0
HV		 677static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
678{
679 const struct v4l2_enum_dv_timings *p = arg;
680
681 pr_cont("index=%u, ", p->index);
682 v4l_print_dv_timings(&p->timings, write_only);
683}
684
685static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
686{
687 const struct v4l2_dv_timings_cap *p = arg;
688
689 switch (p->type) {
690 case V4L2_DV_BT_656_1120:
691 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
692 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
693 p->bt.min_width, p->bt.max_width,
694 p->bt.min_height, p->bt.max_height,
695 p->bt.min_pixelclock, p->bt.max_pixelclock,
696 p->bt.standards, p->bt.capabilities);
697 break;
698 default:
699 pr_cont("type=%u\n", p->type);
700 break;
701 }
702}
703
458aa4a6
HV		 704static void v4l_print_frmsizeenum(const void *arg, bool write_only)
705{
706 const struct v4l2_frmsizeenum *p = arg;
707
708 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
709 p->index,
710 (p->pixel_format & 0xff),
711 (p->pixel_format >> 8) & 0xff,
712 (p->pixel_format >> 16) & 0xff,
713 (p->pixel_format >> 24) & 0xff,
714 p->type);
715 switch (p->type) {
716 case V4L2_FRMSIZE_TYPE_DISCRETE:
560dde24 717 pr_cont(", wxh=%ux%u\n",
458aa4a6
HV		 718 p->discrete.width, p->discrete.height);
719 break;
720 case V4L2_FRMSIZE_TYPE_STEPWISE:
560dde24 721 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
458aa4a6
HV		 722 p->stepwise.min_width, p->stepwise.min_height,
723 p->stepwise.step_width, p->stepwise.step_height,
724 p->stepwise.max_width, p->stepwise.max_height);
725 break;
726 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
727 /* fall through */
728 default:
729 pr_cont("\n");
730 break;
731 }
732}
733
734static void v4l_print_frmivalenum(const void *arg, bool write_only)
735{
736 const struct v4l2_frmivalenum *p = arg;
737
738 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
739 p->index,
740 (p->pixel_format & 0xff),
741 (p->pixel_format >> 8) & 0xff,
742 (p->pixel_format >> 16) & 0xff,
743 (p->pixel_format >> 24) & 0xff,
744 p->width, p->height, p->type);
745 switch (p->type) {
746 case V4L2_FRMIVAL_TYPE_DISCRETE:
560dde24 747 pr_cont(", fps=%d/%d\n",
458aa4a6
HV		 748 p->discrete.numerator,
749 p->discrete.denominator);
750 break;
751 case V4L2_FRMIVAL_TYPE_STEPWISE:
560dde24 752 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
458aa4a6
HV		 753 p->stepwise.min.numerator,
754 p->stepwise.min.denominator,
755 p->stepwise.max.numerator,
756 p->stepwise.max.denominator,
757 p->stepwise.step.numerator,
758 p->stepwise.step.denominator);
759 break;
760 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
761 /* fall through */
762 default:
763 pr_cont("\n");
764 break;
765 }
766}
767
768static void v4l_print_event(const void *arg, bool write_only)
769{
770 const struct v4l2_event *p = arg;
771 const struct v4l2_event_ctrl *c;
772
773 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
774 "timestamp=%lu.%9.9lu\n",
775 p->type, p->pending, p->sequence, p->id,
776 p->timestamp.tv_sec, p->timestamp.tv_nsec);
777 switch (p->type) {
778 case V4L2_EVENT_VSYNC:
779 printk(KERN_DEBUG "field=%s\n",
780 prt_names(p->u.vsync.field, v4l2_field_names));
781 break;
782 case V4L2_EVENT_CTRL:
783 c = &p->u.ctrl;
784 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
785 c->changes, c->type);
786 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
787 pr_cont("value64=%lld, ", c->value64);
788 else
789 pr_cont("value=%d, ", c->value);
560dde24
HV		 790 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
791 "default_value=%d\n",
458aa4a6
HV		 792 c->flags, c->minimum, c->maximum,
793 c->step, c->default_value);
794 break;
795 case V4L2_EVENT_FRAME_SYNC:
796 pr_cont("frame_sequence=%u\n",
797 p->u.frame_sync.frame_sequence);
798 break;
799 }
800}
801
802static void v4l_print_event_subscription(const void *arg, bool write_only)
803{
804 const struct v4l2_event_subscription *p = arg;
805
806 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
807 p->type, p->id, p->flags);
808}
809
810static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
811{
812 const struct v4l2_sliced_vbi_cap *p = arg;
813 int i;
814
815 pr_cont("type=%s, service_set=0x%08x\n",
816 prt_names(p->type, v4l2_type_names), p->service_set);
817 for (i = 0; i < 24; i++)
818 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
819 p->service_lines[0][i],
820 p->service_lines[1][i]);
821}
822
82b655bf
HV		 823static void v4l_print_freq_band(const void *arg, bool write_only)
824{
825 const struct v4l2_frequency_band *p = arg;
826
827 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
560dde24 828 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
82b655bf
HV		 829 p->tuner, p->type, p->index,
830 p->capability, p->rangelow,
831 p->rangehigh, p->modulation);
832}
833
efc626b0
HV		 834static void v4l_print_u32(const void *arg, bool write_only)
835{
836 pr_cont("value=%u\n", *(const u32 *)arg);
837}
838
839static void v4l_print_newline(const void *arg, bool write_only)
840{
841 pr_cont("\n");
842}
843
f18d8e07
HV		 844static void v4l_print_default(const void *arg, bool write_only)
845{
846 pr_cont("driver-specific ioctl\n");
847}
848
efbceecd 849static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
35ea11ff
HV		 850{
851 __u32 i;
852
853 /* zero the reserved fields */
854 c->reserved[0] = c->reserved[1] = 0;
6b5a9492 855 for (i = 0; i < c->count; i++)
35ea11ff 856 c->controls[i].reserved2[0] = 0;
6b5a9492 857
35ea11ff
HV		 858 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
859 when using extended controls.
860 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
861 is it allowed for backwards compatibility.
862 */
863 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
864 return 0;
865 /* Check that all controls are from the same control class. */
866 for (i = 0; i < c->count; i++) {
867 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
868 c->error_idx = i;
869 return 0;
870 }
871 }
872 return 1;
873}
874
4b20259f 875static int check_fmt(struct file *file, enum v4l2_buf_type type)
35ea11ff 876{
4b20259f
HV		 877 struct video_device *vfd = video_devdata(file);
878 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
879 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
880 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
881 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
882 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
883
a399810c
HV		 884 if (ops == NULL)
885 return -EINVAL;
886
35ea11ff
HV		 887 switch (type) {
888 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f
HV		 889 if (is_vid && is_rx &&
890 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
d14e6d76
PO		 891 return 0;
892 break;
893 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 894 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
35ea11ff
HV		 895 return 0;
896 break;
897 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 898 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
35ea11ff
HV		 899 return 0;
900 break;
901 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f
HV		 902 if (is_vid && is_tx &&
903 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
d14e6d76
PO		 904 return 0;
905 break;
906 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 907 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
35ea11ff
HV		 908 return 0;
909 break;
910 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 911 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
35ea11ff
HV		 912 return 0;
913 break;
914 case V4L2_BUF_TYPE_VBI_CAPTURE:
4b20259f 915 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
35ea11ff
HV		 916 return 0;
917 break;
918 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 919 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
35ea11ff
HV		 920 return 0;
921 break;
922 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
4b20259f 923 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
35ea11ff
HV		 924 return 0;
925 break;
926 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 927 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
35ea11ff
HV		 928 return 0;
929 break;
633c98e5 930 default:
35ea11ff
HV		 931 break;
932 }
933 return -EINVAL;
934}
935
59076122
HV		 936static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
937 struct file *file, void *fh, void *arg)
938{
939 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
940
941 cap->version = LINUX_VERSION_CODE;
942 return ops->vidioc_querycap(file, fh, cap);
943}
944
945static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
946 struct file *file, void *fh, void *arg)
947{
948 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
949}
950
951static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
952 struct file *file, void *fh, void *arg)
953{
954 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
955}
956
d0547cba
HV		 957static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
958 struct file *file, void *fh, void *arg)
959{
960 struct video_device *vfd;
961 u32 *p = arg;
962
963 if (ops->vidioc_g_priority)
964 return ops->vidioc_g_priority(file, fh, arg);
965 vfd = video_devdata(file);
966 *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
967 return 0;
968}
969
970static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
971 struct file *file, void *fh, void *arg)
972{
973 struct video_device *vfd;
974 struct v4l2_fh *vfh;
975 u32 *p = arg;
976
977 if (ops->vidioc_s_priority)
978 return ops->vidioc_s_priority(file, fh, *p);
979 vfd = video_devdata(file);
980 vfh = file->private_data;
981 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
982}
983
59076122
HV		 984static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
985 struct file *file, void *fh, void *arg)
986{
73f35418 987 struct video_device *vfd = video_devdata(file);
59076122
HV		 988 struct v4l2_input *p = arg;
989
990 /*
02fa6282 991 * We set the flags for CAP_DV_TIMINGS &
59076122
HV		 992 * CAP_STD here based on ioctl handler provided by the
993 * driver. If the driver doesn't support these
994 * for a specific input, it must override these flags.
995 */
73f35418 996 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
59076122 997 p->capabilities |= V4L2_IN_CAP_STD;
59076122
HV		 998
999 return ops->vidioc_enum_input(file, fh, p);
1000}
1001
1002static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1003 struct file *file, void *fh, void *arg)
1004{
73f35418 1005 struct video_device *vfd = video_devdata(file);
59076122
HV		 1006 struct v4l2_output *p = arg;
1007
1008 /*
02fa6282 1009 * We set the flags for CAP_DV_TIMINGS &
59076122
HV		 1010 * CAP_STD here based on ioctl handler provided by the
1011 * driver. If the driver doesn't support these
1012 * for a specific output, it must override these flags.
1013 */
73f35418 1014 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
59076122 1015 p->capabilities |= V4L2_OUT_CAP_STD;
59076122
HV		 1016
1017 return ops->vidioc_enum_output(file, fh, p);
1018}
1019
be6c64e4
HV		 1020static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1021 struct file *file, void *fh, void *arg)
1022{
1023 struct v4l2_fmtdesc *p = arg;
4b20259f
HV		 1024 struct video_device *vfd = video_devdata(file);
1025 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1026 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1027
1028 switch (p->type) {
1029 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1030 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
be6c64e4
HV		 1031 break;
1032 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1033 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1034 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
be6c64e4
HV		 1035 break;
1036 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1037 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1038 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
be6c64e4
HV		 1039 break;
1040 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1041 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1042 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
be6c64e4
HV		 1043 break;
1044 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1045 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1046 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
be6c64e4
HV		 1047 break;
1048 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
be6c64e4
HV		 1049 }
1050 return -EINVAL;
1051}
1052
1053static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1054 struct file *file, void *fh, void *arg)
1055{
1056 struct v4l2_format *p = arg;
4b20259f
HV		 1057 struct video_device *vfd = video_devdata(file);
1058 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1059 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1060 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1061
1062 switch (p->type) {
1063 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1064 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
be6c64e4
HV		 1065 break;
1066 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1067 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1068 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
be6c64e4
HV		 1069 break;
1070 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1071 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1072 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
be6c64e4
HV		 1073 break;
1074 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
4b20259f
HV		 1075 case V4L2_BUF_TYPE_VBI_CAPTURE:
1076 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1077 break;
1078 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1079 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1080 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1081 break;
1082 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
be6c64e4 1083 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1084 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
be6c64e4
HV		 1085 break;
1086 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1087 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1088 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
be6c64e4
HV		 1089 break;
1090 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1091 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 1092 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
be6c64e4
HV		 1093 break;
1094 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
be6c64e4 1095 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 1096 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
be6c64e4
HV		 1097 break;
1098 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
be6c64e4 1099 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 1100 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
be6c64e4
HV		 1101 break;
1102 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
be6c64e4
HV		 1103 }
1104 return -EINVAL;
1105}
1106
1107static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1108 struct file *file, void *fh, void *arg)
1109{
1110 struct v4l2_format *p = arg;
4b20259f
HV		 1111 struct video_device *vfd = video_devdata(file);
1112 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1113 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1114 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1115
1116 switch (p->type) {
1117 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1118 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
be6c64e4
HV		 1119 break;
1120 CLEAR_AFTER_FIELD(p, fmt.pix);
1121 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1122 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1123 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
be6c64e4
HV		 1124 break;
1125 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1126 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1127 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1128 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
be6c64e4
HV		 1129 break;
1130 CLEAR_AFTER_FIELD(p, fmt.win);
1131 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
4b20259f
HV		 1132 case V4L2_BUF_TYPE_VBI_CAPTURE:
1133 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1134 break;
1135 CLEAR_AFTER_FIELD(p, fmt.vbi);
1136 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1137 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1138 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1139 break;
1140 CLEAR_AFTER_FIELD(p, fmt.sliced);
1141 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
be6c64e4 1142 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1143 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
be6c64e4
HV		 1144 break;
1145 CLEAR_AFTER_FIELD(p, fmt.pix);
1146 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1147 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1148 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
be6c64e4
HV		 1149 break;
1150 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1151 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1152 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 1153 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
be6c64e4
HV		 1154 break;
1155 CLEAR_AFTER_FIELD(p, fmt.win);
1156 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
be6c64e4 1157 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 1158 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
be6c64e4
HV		 1159 break;
1160 CLEAR_AFTER_FIELD(p, fmt.vbi);
1161 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
be6c64e4 1162 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 1163 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
be6c64e4
HV		 1164 break;
1165 CLEAR_AFTER_FIELD(p, fmt.sliced);
1166 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
be6c64e4
HV		 1167 }
1168 return -EINVAL;
1169}
1170
1171static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1172 struct file *file, void *fh, void *arg)
1173{
1174 struct v4l2_format *p = arg;
4b20259f
HV		 1175 struct video_device *vfd = video_devdata(file);
1176 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1177 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1178 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1179
1180 switch (p->type) {
1181 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1182 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
be6c64e4
HV		 1183 break;
1184 CLEAR_AFTER_FIELD(p, fmt.pix);
1185 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1186 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1187 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
be6c64e4
HV		 1188 break;
1189 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1190 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1191 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1192 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
be6c64e4
HV		 1193 break;
1194 CLEAR_AFTER_FIELD(p, fmt.win);
1195 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
4b20259f
HV		 1196 case V4L2_BUF_TYPE_VBI_CAPTURE:
1197 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1198 break;
1199 CLEAR_AFTER_FIELD(p, fmt.vbi);
1200 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1201 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1202 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1203 break;
1204 CLEAR_AFTER_FIELD(p, fmt.sliced);
1205 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
be6c64e4 1206 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1207 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
be6c64e4
HV		 1208 break;
1209 CLEAR_AFTER_FIELD(p, fmt.pix);
1210 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1211 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1212 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
be6c64e4
HV		 1213 break;
1214 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1215 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1216 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 1217 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
be6c64e4
HV		 1218 break;
1219 CLEAR_AFTER_FIELD(p, fmt.win);
1220 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
be6c64e4 1221 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 1222 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
be6c64e4
HV		 1223 break;
1224 CLEAR_AFTER_FIELD(p, fmt.vbi);
1225 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
be6c64e4 1226 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 1227 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
be6c64e4
HV		 1228 break;
1229 CLEAR_AFTER_FIELD(p, fmt.sliced);
1230 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
be6c64e4
HV		 1231 }
1232 return -EINVAL;
1233}
1234
e325b244
HV		 1235static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1236 struct file *file, void *fh, void *arg)
1237{
1238 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1239}
1240
1241static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1242 struct file *file, void *fh, void *arg)
1243{
1244 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1245}
1246
4b1e2e4d
HV		 1247static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1248 struct file *file, void *fh, void *arg)
1249{
1250 struct video_device *vfd = video_devdata(file);
1251 struct v4l2_tuner *p = arg;
82b655bf 1252 int err;
4b1e2e4d
HV		 1253
1254 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1255 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
82b655bf
HV		 1256 err = ops->vidioc_g_tuner(file, fh, p);
1257 if (!err)
1258 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1259 return err;
4b1e2e4d
HV		 1260}
1261
1262static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1263 struct file *file, void *fh, void *arg)
1264{
1265 struct video_device *vfd = video_devdata(file);
1266 struct v4l2_tuner *p = arg;
1267
1268 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1269 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1270 return ops->vidioc_s_tuner(file, fh, p);
1271}
1272
82b655bf
HV		 1273static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1274 struct file *file, void *fh, void *arg)
1275{
1276 struct v4l2_modulator *p = arg;
1277 int err;
1278
1279 err = ops->vidioc_g_modulator(file, fh, p);
1280 if (!err)
1281 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1282 return err;
1283}
1284
4b1e2e4d
HV		 1285static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1286 struct file *file, void *fh, void *arg)
1287{
1288 struct video_device *vfd = video_devdata(file);
1289 struct v4l2_frequency *p = arg;
1290
1291 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1292 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1293 return ops->vidioc_g_frequency(file, fh, p);
1294}
1295
1296static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1297 struct file *file, void *fh, void *arg)
1298{
1299 struct video_device *vfd = video_devdata(file);
b530a447 1300 const struct v4l2_frequency *p = arg;
4b1e2e4d
HV		 1301 enum v4l2_tuner_type type;
1302
1303 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1304 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1305 if (p->type != type)
1306 return -EINVAL;
1307 return ops->vidioc_s_frequency(file, fh, p);
1308}
1309
1310static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1311 struct file *file, void *fh, void *arg)
1312{
1313 struct video_device *vfd = video_devdata(file);
1314 struct v4l2_standard *p = arg;
1315 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1316 unsigned int index = p->index, i, j = 0;
1317 const char *descr = "";
1318
a5338190
HV		 1319 /* Return -ENODATA if the tvnorms for the current input
1320 or output is 0, meaning that it doesn't support this API. */
1321 if (id == 0)
1322 return -ENODATA;
1323
4b1e2e4d
HV		 1324 /* Return norm array in a canonical way */
1325 for (i = 0; i <= index && id; i++) {
1326 /* last std value in the standards array is 0, so this
1327 while always ends there since (id & 0) == 0. */
1328 while ((id & standards[j].std) != standards[j].std)
1329 j++;
1330 curr_id = standards[j].std;
1331 descr = standards[j].descr;
1332 j++;
1333 if (curr_id == 0)
1334 break;
1335 if (curr_id != V4L2_STD_PAL &&
1336 curr_id != V4L2_STD_SECAM &&
1337 curr_id != V4L2_STD_NTSC)
1338 id &= ~curr_id;
1339 }
1340 if (i <= index)
1341 return -EINVAL;
1342
1343 v4l2_video_std_construct(p, curr_id, descr);
1344 return 0;
1345}
1346
4b1e2e4d
HV		 1347static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1348 struct file *file, void *fh, void *arg)
1349{
1350 struct video_device *vfd = video_devdata(file);
314527ac 1351 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
4b1e2e4d 1352
314527ac 1353 norm = id & vfd->tvnorms;
4b1e2e4d
HV		 1354 if (vfd->tvnorms && !norm) /* Check if std is supported */
1355 return -EINVAL;
1356
1357 /* Calls the specific handler */
ca371575 1358 return ops->vidioc_s_std(file, fh, norm);
4b1e2e4d
HV		 1359}
1360
1361static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1362 struct file *file, void *fh, void *arg)
1363{
1364 struct video_device *vfd = video_devdata(file);
1365 v4l2_std_id *p = arg;
1366
1367 /*
1a2c6866
HV		 1368 * If no signal is detected, then the driver should return
1369 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1370 * any standards that do not apply removed.
1371 *
4b1e2e4d
HV		 1372 * This means that tuners, audio and video decoders can join
1373 * their efforts to improve the standards detection.
1374 */
1375 *p = vfd->tvnorms;
1376 return ops->vidioc_querystd(file, fh, arg);
1377}
1378
1379static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1380 struct file *file, void *fh, void *arg)
1381{
1382 struct video_device *vfd = video_devdata(file);
1383 struct v4l2_hw_freq_seek *p = arg;
1384 enum v4l2_tuner_type type;
1385
1386 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1387 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1388 if (p->type != type)
1389 return -EINVAL;
1390 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1391}
1392
737c097b
HV		 1393static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1394 struct file *file, void *fh, void *arg)
1395{
1396 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1397}
1398
eb3728ed
HV		 1399static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1400 struct file *file, void *fh, void *arg)
1401{
1402 struct v4l2_requestbuffers *p = arg;
4b20259f 1403 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1404
1405 if (ret)
1406 return ret;
1407
633c98e5 1408 CLEAR_AFTER_FIELD(p, memory);
eb3728ed
HV		 1409
1410 return ops->vidioc_reqbufs(file, fh, p);
1411}
1412
1413static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1414 struct file *file, void *fh, void *arg)
1415{
1416 struct v4l2_buffer *p = arg;
4b20259f 1417 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1418
1419 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1420}
1421
1422static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1423 struct file *file, void *fh, void *arg)
1424{
1425 struct v4l2_buffer *p = arg;
4b20259f 1426 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1427
1428 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1429}
1430
1431static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1432 struct file *file, void *fh, void *arg)
1433{
1434 struct v4l2_buffer *p = arg;
4b20259f 1435 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1436
1437 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1438}
1439
1440static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1441 struct file *file, void *fh, void *arg)
1442{
1443 struct v4l2_create_buffers *create = arg;
4b20259f 1444 int ret = check_fmt(file, create->format.type);
eb3728ed
HV		 1445
1446 return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1447}
1448
1449static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1450 struct file *file, void *fh, void *arg)
1451{
1452 struct v4l2_buffer *b = arg;
4b20259f 1453 int ret = check_fmt(file, b->type);
eb3728ed
HV		 1454
1455 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1456}
1457
1458static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1459 struct file *file, void *fh, void *arg)
1460{
eb3728ed
HV		 1461 struct v4l2_streamparm *p = arg;
1462 v4l2_std_id std;
4b20259f 1463 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1464
1465 if (ret)
1466 return ret;
1467 if (ops->vidioc_g_parm)
1468 return ops->vidioc_g_parm(file, fh, p);
eb3728ed
HV		 1469 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1470 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1471 return -EINVAL;
1472 p->parm.capture.readbuffers = 2;
ca371575 1473 ret = ops->vidioc_g_std(file, fh, &std);
eb3728ed 1474 if (ret == 0)
ca371575 1475 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
eb3728ed
HV		 1476 return ret;
1477}
1478
1479static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1480 struct file *file, void *fh, void *arg)
1481{
1482 struct v4l2_streamparm *p = arg;
4b20259f 1483 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1484
1485 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1486}
1487
efbceecd
HV		 1488static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1489 struct file *file, void *fh, void *arg)
1490{
1491 struct video_device *vfd = video_devdata(file);
1492 struct v4l2_queryctrl *p = arg;
7a3ed2d9
HV		 1493 struct v4l2_fh *vfh =
1494 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1495
1496 if (vfh && vfh->ctrl_handler)
1497 return v4l2_queryctrl(vfh->ctrl_handler, p);
1498 if (vfd->ctrl_handler)
1499 return v4l2_queryctrl(vfd->ctrl_handler, p);
1500 if (ops->vidioc_queryctrl)
1501 return ops->vidioc_queryctrl(file, fh, p);
1502 return -ENOTTY;
1503}
1504
1505static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1506 struct file *file, void *fh, void *arg)
1507{
1508 struct video_device *vfd = video_devdata(file);
1509 struct v4l2_querymenu *p = arg;
7a3ed2d9
HV		 1510 struct v4l2_fh *vfh =
1511 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1512
1513 if (vfh && vfh->ctrl_handler)
1514 return v4l2_querymenu(vfh->ctrl_handler, p);
1515 if (vfd->ctrl_handler)
1516 return v4l2_querymenu(vfd->ctrl_handler, p);
1517 if (ops->vidioc_querymenu)
1518 return ops->vidioc_querymenu(file, fh, p);
1519 return -ENOTTY;
1520}
1521
1522static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1523 struct file *file, void *fh, void *arg)
1524{
1525 struct video_device *vfd = video_devdata(file);
1526 struct v4l2_control *p = arg;
7a3ed2d9
HV		 1527 struct v4l2_fh *vfh =
1528 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1529 struct v4l2_ext_controls ctrls;
1530 struct v4l2_ext_control ctrl;
1531
1532 if (vfh && vfh->ctrl_handler)
1533 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1534 if (vfd->ctrl_handler)
1535 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1536 if (ops->vidioc_g_ctrl)
1537 return ops->vidioc_g_ctrl(file, fh, p);
1538 if (ops->vidioc_g_ext_ctrls == NULL)
1539 return -ENOTTY;
1540
1541 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1542 ctrls.count = 1;
1543 ctrls.controls = &ctrl;
1544 ctrl.id = p->id;
1545 ctrl.value = p->value;
1546 if (check_ext_ctrls(&ctrls, 1)) {
1547 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1548
1549 if (ret == 0)
1550 p->value = ctrl.value;
1551 return ret;
1552 }
1553 return -EINVAL;
1554}
1555
1556static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1557 struct file *file, void *fh, void *arg)
1558{
1559 struct video_device *vfd = video_devdata(file);
1560 struct v4l2_control *p = arg;
7a3ed2d9
HV		 1561 struct v4l2_fh *vfh =
1562 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1563 struct v4l2_ext_controls ctrls;
1564 struct v4l2_ext_control ctrl;
1565
1566 if (vfh && vfh->ctrl_handler)
1567 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1568 if (vfd->ctrl_handler)
1569 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1570 if (ops->vidioc_s_ctrl)
1571 return ops->vidioc_s_ctrl(file, fh, p);
1572 if (ops->vidioc_s_ext_ctrls == NULL)
1573 return -ENOTTY;
1574
1575 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1576 ctrls.count = 1;
1577 ctrls.controls = &ctrl;
1578 ctrl.id = p->id;
1579 ctrl.value = p->value;
1580 if (check_ext_ctrls(&ctrls, 1))
1581 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1582 return -EINVAL;
1583}
1584
1585static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1586 struct file *file, void *fh, void *arg)
1587{
1588 struct video_device *vfd = video_devdata(file);
1589 struct v4l2_ext_controls *p = arg;
7a3ed2d9
HV		 1590 struct v4l2_fh *vfh =
1591 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1592
1593 p->error_idx = p->count;
1594 if (vfh && vfh->ctrl_handler)
1595 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1596 if (vfd->ctrl_handler)
1597 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1598 if (ops->vidioc_g_ext_ctrls == NULL)
1599 return -ENOTTY;
1600 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1601 -EINVAL;
1602}
1603
1604static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1605 struct file *file, void *fh, void *arg)
1606{
1607 struct video_device *vfd = video_devdata(file);
1608 struct v4l2_ext_controls *p = arg;
7a3ed2d9
HV		 1609 struct v4l2_fh *vfh =
1610 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1611
1612 p->error_idx = p->count;
1613 if (vfh && vfh->ctrl_handler)
1614 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1615 if (vfd->ctrl_handler)
1616 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1617 if (ops->vidioc_s_ext_ctrls == NULL)
1618 return -ENOTTY;
1619 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1620 -EINVAL;
1621}
1622
1623static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1624 struct file *file, void *fh, void *arg)
1625{
1626 struct video_device *vfd = video_devdata(file);
1627 struct v4l2_ext_controls *p = arg;
7a3ed2d9
HV		 1628 struct v4l2_fh *vfh =
1629 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1630
1631 p->error_idx = p->count;
1632 if (vfh && vfh->ctrl_handler)
1633 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1634 if (vfd->ctrl_handler)
1635 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1636 if (ops->vidioc_try_ext_ctrls == NULL)
1637 return -ENOTTY;
1638 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1639 -EINVAL;
1640}
1641
d84f2d94
HV		 1642static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1643 struct file *file, void *fh, void *arg)
1644{
1645 struct v4l2_crop *p = arg;
1646 struct v4l2_selection s = {
1647 .type = p->type,
1648 };
1649 int ret;
1650
1651 if (ops->vidioc_g_crop)
1652 return ops->vidioc_g_crop(file, fh, p);
1653 /* simulate capture crop using selection api */
1654
1655 /* crop means compose for output devices */
1656 if (V4L2_TYPE_IS_OUTPUT(p->type))
1657 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1658 else
1659 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1660
1661 ret = ops->vidioc_g_selection(file, fh, &s);
1662
1663 /* copying results to old structure on success */
1664 if (!ret)
1665 p->c = s.r;
1666 return ret;
1667}
1668
1669static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1670 struct file *file, void *fh, void *arg)
1671{
1672 struct v4l2_crop *p = arg;
1673 struct v4l2_selection s = {
1674 .type = p->type,
1675 .r = p->c,
1676 };
1677
1678 if (ops->vidioc_s_crop)
1679 return ops->vidioc_s_crop(file, fh, p);
1680 /* simulate capture crop using selection api */
1681
1682 /* crop means compose for output devices */
1683 if (V4L2_TYPE_IS_OUTPUT(p->type))
1684 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1685 else
1686 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1687
1688 return ops->vidioc_s_selection(file, fh, &s);
1689}
1690
1691static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1692 struct file *file, void *fh, void *arg)
1693{
1694 struct v4l2_cropcap *p = arg;
1695 struct v4l2_selection s = { .type = p->type };
1696 int ret;
1697
1698 if (ops->vidioc_cropcap)
1699 return ops->vidioc_cropcap(file, fh, p);
1700
1701 /* obtaining bounds */
1702 if (V4L2_TYPE_IS_OUTPUT(p->type))
1703 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1704 else
1705 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1706
1707 ret = ops->vidioc_g_selection(file, fh, &s);
1708 if (ret)
1709 return ret;
1710 p->bounds = s.r;
1711
1712 /* obtaining defrect */
1713 if (V4L2_TYPE_IS_OUTPUT(p->type))
1714 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1715 else
1716 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1717
1718 ret = ops->vidioc_g_selection(file, fh, &s);
1719 if (ret)
1720 return ret;
1721 p->defrect = s.r;
1722
1723 /* setting trivial pixelaspect */
1724 p->pixelaspect.numerator = 1;
1725 p->pixelaspect.denominator = 1;
1726 return 0;
1727}
1728
f16f77b0
HV		 1729static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1730 struct file *file, void *fh, void *arg)
1731{
1732 struct video_device *vfd = video_devdata(file);
1733 int ret;
1734
1735 if (vfd->v4l2_dev)
1736 pr_info("%s: ================= START STATUS =================\n",
1737 vfd->v4l2_dev->name);
1738 ret = ops->vidioc_log_status(file, fh);
1739 if (vfd->v4l2_dev)
1740 pr_info("%s: ================== END STATUS ==================\n",
1741 vfd->v4l2_dev->name);
1742 return ret;
1743}
1744
1745static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1746 struct file *file, void *fh, void *arg)
1747{
1748#ifdef CONFIG_VIDEO_ADV_DEBUG
1749 struct v4l2_dbg_register *p = arg;
79b0c640
HV		 1750 struct video_device *vfd = video_devdata(file);
1751 struct v4l2_subdev *sd;
1752 int idx = 0;
f16f77b0
HV		 1753
1754 if (!capable(CAP_SYS_ADMIN))
1755 return -EPERM;
3eef2510 1756 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
79b0c640
HV		 1757 if (vfd->v4l2_dev == NULL)
1758 return -EINVAL;
3eef2510
HV		 1759 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1760 if (p->match.addr == idx++)
79b0c640 1761 return v4l2_subdev_call(sd, core, g_register, p);
79b0c640
HV		 1762 return -EINVAL;
1763 }
191b79b0
HV		 1764 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1765 (ops->vidioc_g_chip_info || p->match.addr == 0))
79b0c640
HV		 1766 return ops->vidioc_g_register(file, fh, p);
1767 return -EINVAL;
f16f77b0
HV		 1768#else
1769 return -ENOTTY;
1770#endif
1771}
1772
1773static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1774 struct file *file, void *fh, void *arg)
1775{
1776#ifdef CONFIG_VIDEO_ADV_DEBUG
977ba3b1 1777 const struct v4l2_dbg_register *p = arg;
79b0c640
HV		 1778 struct video_device *vfd = video_devdata(file);
1779 struct v4l2_subdev *sd;
1780 int idx = 0;
f16f77b0
HV		 1781
1782 if (!capable(CAP_SYS_ADMIN))
1783 return -EPERM;
3eef2510 1784 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
79b0c640
HV		 1785 if (vfd->v4l2_dev == NULL)
1786 return -EINVAL;
3eef2510
HV		 1787 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1788 if (p->match.addr == idx++)
79b0c640 1789 return v4l2_subdev_call(sd, core, s_register, p);
79b0c640
HV		 1790 return -EINVAL;
1791 }
191b79b0
HV		 1792 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1793 (ops->vidioc_g_chip_info || p->match.addr == 0))
79b0c640
HV		 1794 return ops->vidioc_s_register(file, fh, p);
1795 return -EINVAL;
f16f77b0
HV		 1796#else
1797 return -ENOTTY;
1798#endif
1799}
1800
96b03d2a 1801static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
79b0c640
HV		 1802 struct file *file, void *fh, void *arg)
1803{
cd634f1b 1804#ifdef CONFIG_VIDEO_ADV_DEBUG
79b0c640 1805 struct video_device *vfd = video_devdata(file);
96b03d2a 1806 struct v4l2_dbg_chip_info *p = arg;
79b0c640
HV		 1807 struct v4l2_subdev *sd;
1808 int idx = 0;
1809
1810 switch (p->match.type) {
1811 case V4L2_CHIP_MATCH_BRIDGE:
79b0c640
HV		 1812 if (ops->vidioc_s_register)
1813 p->flags |= V4L2_CHIP_FL_WRITABLE;
1814 if (ops->vidioc_g_register)
1815 p->flags |= V4L2_CHIP_FL_READABLE;
1c1d86a1 1816 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
96b03d2a
HV		 1817 if (ops->vidioc_g_chip_info)
1818 return ops->vidioc_g_chip_info(file, fh, arg);
0f0fe4b9
HV		 1819 if (p->match.addr)
1820 return -EINVAL;
79b0c640
HV		 1821 return 0;
1822
3eef2510 1823 case V4L2_CHIP_MATCH_SUBDEV:
79b0c640
HV		 1824 if (vfd->v4l2_dev == NULL)
1825 break;
1826 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
3eef2510
HV		 1827 if (p->match.addr != idx++)
1828 continue;
1829 if (sd->ops->core && sd->ops->core->s_register)
1830 p->flags |= V4L2_CHIP_FL_WRITABLE;
1831 if (sd->ops->core && sd->ops->core->g_register)
1832 p->flags |= V4L2_CHIP_FL_READABLE;
1833 strlcpy(p->name, sd->name, sizeof(p->name));
1834 return 0;
79b0c640
HV		 1835 }
1836 break;
1837 }
1838 return -EINVAL;
cd634f1b
HV		 1839#else
1840 return -ENOTTY;
1841#endif
79b0c640
HV		 1842}
1843
458aa4a6
HV		 1844static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1845 struct file *file, void *fh, void *arg)
1846{
1847 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1848}
1849
1850static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1851 struct file *file, void *fh, void *arg)
1852{
1853 return ops->vidioc_subscribe_event(fh, arg);
1854}
1855
1856static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1857 struct file *file, void *fh, void *arg)
1858{
1859 return ops->vidioc_unsubscribe_event(fh, arg);
1860}
1861
1862static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1863 struct file *file, void *fh, void *arg)
1864{
1865 struct v4l2_sliced_vbi_cap *p = arg;
4b20259f
HV		 1866 int ret = check_fmt(file, p->type);
1867
1868 if (ret)
1869 return ret;
458aa4a6
HV		 1870
1871 /* Clear up to type, everything after type is zeroed already */
1872 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1873
1874 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1875}
1876
82b655bf
HV		 1877static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1878 struct file *file, void *fh, void *arg)
1879{
1880 struct video_device *vfd = video_devdata(file);
1881 struct v4l2_frequency_band *p = arg;
1882 enum v4l2_tuner_type type;
1883 int err;
1884
1885 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1886 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1887
1888 if (type != p->type)
1889 return -EINVAL;
1890 if (ops->vidioc_enum_freq_bands)
1891 return ops->vidioc_enum_freq_bands(file, fh, p);
73f35418 1892 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
82b655bf
HV		 1893 struct v4l2_tuner t = {
1894 .index = p->tuner,
1895 .type = type,
1896 };
1897
aa4d9b53
HV		 1898 if (p->index)
1899 return -EINVAL;
82b655bf
HV		 1900 err = ops->vidioc_g_tuner(file, fh, &t);
1901 if (err)
1902 return err;
1903 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1904 p->rangelow = t.rangelow;
1905 p->rangehigh = t.rangehigh;
1906 p->modulation = (type == V4L2_TUNER_RADIO) ?
1907 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1908 return 0;
1909 }
73f35418 1910 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
82b655bf
HV		 1911 struct v4l2_modulator m = {
1912 .index = p->tuner,
1913 };
1914
1915 if (type != V4L2_TUNER_RADIO)
1916 return -EINVAL;
aa4d9b53
HV		 1917 if (p->index)
1918 return -EINVAL;
82b655bf
HV		 1919 err = ops->vidioc_g_modulator(file, fh, &m);
1920 if (err)
1921 return err;
1922 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1923 p->rangelow = m.rangelow;
1924 p->rangehigh = m.rangehigh;
1925 p->modulation = (type == V4L2_TUNER_RADIO) ?
1926 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1927 return 0;
1928 }
1929 return -ENOTTY;
1930}
1931
4839e6c2
HV		 1932struct v4l2_ioctl_info {
1933 unsigned int ioctl;
27cd2aba 1934 u32 flags;
4839e6c2 1935 const char * const name;
86748f35
HV		 1936 union {
1937 u32 offset;
1938 int (*func)(const struct v4l2_ioctl_ops *ops,
1939 struct file *file, void *fh, void *p);
26ddcbcc 1940 } u;
86748f35 1941 void (*debug)(const void *arg, bool write_only);
4839e6c2
HV		 1942};
1943
1944/* This control needs a priority check */
1945#define INFO_FL_PRIO (1 << 0)
1946/* This control can be valid if the filehandle passes a control handler. */
1947#define INFO_FL_CTRL (1 << 1)
86748f35
HV		 1948/* This is a standard ioctl, no need for special code */
1949#define INFO_FL_STD (1 << 2)
1950/* This is ioctl has its own function */
1951#define INFO_FL_FUNC (1 << 3)
5a5adf6b
HV		 1952/* Queuing ioctl */
1953#define INFO_FL_QUEUE (1 << 4)
27cd2aba
HV		 1954/* Zero struct from after the field to the end */
1955#define INFO_FL_CLEAR(v4l2_struct, field) \
1956 ((offsetof(struct v4l2_struct, field) + \
1957 sizeof(((struct v4l2_struct *)0)->field)) << 16)
1958#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
4839e6c2 1959
86748f35
HV		 1960#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
1961 [_IOC_NR(_ioctl)] = { \
1962 .ioctl = _ioctl, \
1963 .flags = _flags | INFO_FL_STD, \
1964 .name = #_ioctl, \
26ddcbcc 1965 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
86748f35
HV		 1966 .debug = _debug, \
1967 }
1968
1969#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
1970 [_IOC_NR(_ioctl)] = { \
1971 .ioctl = _ioctl, \
1972 .flags = _flags | INFO_FL_FUNC, \
1973 .name = #_ioctl, \
26ddcbcc 1974 .u.func = _func, \
86748f35
HV		 1975 .debug = _debug, \
1976 }
1977
4839e6c2 1978static struct v4l2_ioctl_info v4l2_ioctls[] = {
59076122 1979 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
be6c64e4
HV		 1980 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1981 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1982 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
5a5adf6b
HV		 1983 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1984 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
be6c64e4
HV		 1985 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1986 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
737c097b 1987 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
5a5adf6b 1988 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
b799d09a 1989 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
5a5adf6b
HV		 1990 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1991 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1992 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
eb3728ed
HV		 1993 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1994 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
ca371575 1995 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
4b1e2e4d
HV		 1996 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1997 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
59076122 1998 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
efbceecd
HV		 1999 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2000 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
4b1e2e4d
HV		 2001 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2002 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
59076122
HV		 2003 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2004 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
efbceecd
HV		 2005 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2006 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
59076122
HV		 2007 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2008 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2009 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2010 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2011 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2012 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2013 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
82b655bf 2014 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
4b1e2e4d
HV		 2015 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2016 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2017 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
d84f2d94
HV		 2018 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2019 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2020 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2021 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2022 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
d806f2df
HV		 2023 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2024 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
4b1e2e4d 2025 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
be6c64e4 2026 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
59076122
HV		 2027 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2028 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
d0547cba
HV		 2029 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2030 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
458aa4a6 2031 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)),
f16f77b0 2032 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
efbceecd
HV		 2033 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2034 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
9bc31633 2035 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
458aa4a6
HV		 2036 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2037 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
d806f2df
HV		 2038 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2039 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2040 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2041 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2042 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
f16f77b0
HV		 2043 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2044 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
4b1e2e4d 2045 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
efc626b0
HV		 2046 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2047 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
458aa4a6
HV		 2048 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2049 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2050 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
5a5adf6b
HV		 2051 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2052 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
efc626b0
HV		 2053 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2054 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
a1acb8f9 2055 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
82b655bf 2056 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
96b03d2a 2057 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)),
4839e6c2
HV		 2058};
2059#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2060
2061bool v4l2_is_known_ioctl(unsigned int cmd)
2062{
2063 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2064 return false;
2065 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2066}
2067
5a5adf6b
HV		 2068struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2069{
2070 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2071 return vdev->lock;
2072 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2073 return NULL;
2074 if (vdev->queue && vdev->queue->lock &&
2075 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2076 return vdev->queue->lock;
2077 return vdev->lock;
2078}
2079
4839e6c2
HV		 2080/* Common ioctl debug function. This function can be used by
2081 external ioctl messages as well as internal V4L ioctl */
4a085168 2082void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
4839e6c2 2083{
86748f35 2084 const char *dir, *type;
4839e6c2 2085
4a085168
HV		 2086 if (prefix)
2087 printk(KERN_DEBUG "%s: ", prefix);
2088
4839e6c2
HV		 2089 switch (_IOC_TYPE(cmd)) {
2090 case 'd':
2091 type = "v4l2_int";
2092 break;
2093 case 'V':
2094 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2095 type = "v4l2";
2096 break;
2097 }
86748f35 2098 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
4839e6c2
HV		 2099 return;
2100 default:
2101 type = "unknown";
86748f35 2102 break;
4839e6c2
HV		 2103 }
2104
2105 switch (_IOC_DIR(cmd)) {
2106 case _IOC_NONE: dir = "--"; break;
2107 case _IOC_READ: dir = "r-"; break;
2108 case _IOC_WRITE: dir = "-w"; break;
2109 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2110 default: dir = "*ERR*"; break;
2111 }
86748f35 2112 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
4839e6c2
HV		 2113 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2114}
2115EXPORT_SYMBOL(v4l_printk_ioctl);
2116
069b7479 2117static long __video_do_ioctl(struct file *file,
35ea11ff
HV		 2118 unsigned int cmd, void *arg)
2119{
2120 struct video_device *vfd = video_devdata(file);
a399810c 2121 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
86748f35
HV		 2122 bool write_only = false;
2123 struct v4l2_ioctl_info default_info;
2124 const struct v4l2_ioctl_info *info;
d5fbf32f 2125 void *fh = file->private_data;
99cd47bc 2126 struct v4l2_fh *vfh = NULL;
b1a873a3 2127 int use_fh_prio = 0;
80131fe0 2128 int debug = vfd->debug;
9190d191 2129 long ret = -ENOTTY;
35ea11ff 2130
6a717883 2131 if (ops == NULL) {
4a085168
HV		 2132 pr_warn("%s: has no ioctl_ops.\n",
2133 video_device_node_name(vfd));
9190d191 2134 return ret;
6a717883
HV		 2135 }
2136
b1a873a3 2137 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
99cd47bc 2138 vfh = file->private_data;
b1a873a3
HV		 2139 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2140 }
99cd47bc 2141
48ea0be0 2142 if (v4l2_is_known_ioctl(cmd)) {
86748f35 2143 info = &v4l2_ioctls[_IOC_NR(cmd)];
48ea0be0
HV		 2144
2145 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2146 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
86748f35 2147 goto done;
4b902fec
HV		 2148
2149 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2150 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2151 if (ret)
86748f35 2152 goto done;
4b902fec 2153 }
86748f35
HV		 2154 } else {
2155 default_info.ioctl = cmd;
2156 default_info.flags = 0;
f18d8e07 2157 default_info.debug = v4l_print_default;
86748f35 2158 info = &default_info;
48ea0be0
HV		 2159 }
2160
86748f35 2161 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
86748f35
HV		 2162 if (info->flags & INFO_FL_STD) {
2163 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2164 const void *p = vfd->ioctl_ops;
26ddcbcc 2165 const vidioc_op *vidioc = p + info->u.offset;
86748f35
HV		 2166
2167 ret = (*vidioc)(file, fh, arg);
86748f35 2168 } else if (info->flags & INFO_FL_FUNC) {
26ddcbcc 2169 ret = info->u.func(ops, file, fh, arg);
f18d8e07
HV		 2170 } else if (!ops->vidioc_default) {
2171 ret = -ENOTTY;
2172 } else {
2173 ret = ops->vidioc_default(file, fh,
2174 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2175 cmd, arg);
48ea0be0 2176 }
99cd47bc 2177
86748f35 2178done:
80131fe0 2179 if (debug) {
4a085168 2180 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
86748f35 2181 if (ret < 0)
505d04bd
HV		 2182 pr_cont(": error %ld", ret);
2183 if (debug == V4L2_DEBUG_IOCTL)
86748f35 2184 pr_cont("\n");
86748f35
HV		 2185 else if (_IOC_DIR(cmd) == _IOC_NONE)
2186 info->debug(arg, write_only);
2187 else {
2188 pr_cont(": ");
2189 info->debug(arg, write_only);
35ea11ff
HV		 2190 }
2191 }
2192
2193 return ret;
2194}
2195
d14e6d76
PO		 2196static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2197 void * __user *user_ptr, void ***kernel_ptr)
2198{
2199 int ret = 0;
2200
2201 switch (cmd) {
96b1a702 2202 case VIDIOC_PREPARE_BUF:
d14e6d76
PO		 2203 case VIDIOC_QUERYBUF:
2204 case VIDIOC_QBUF:
2205 case VIDIOC_DQBUF: {
2206 struct v4l2_buffer *buf = parg;
2207
2208 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2209 if (buf->length > VIDEO_MAX_PLANES) {
2210 ret = -EINVAL;
2211 break;
2212 }
2213 *user_ptr = (void __user *)buf->m.planes;
2ef40370 2214 *kernel_ptr = (void *)&buf->m.planes;
d14e6d76
PO		 2215 *array_size = sizeof(struct v4l2_plane) * buf->length;
2216 ret = 1;
2217 }
2218 break;
2219 }
2220
ed45ce2c
HV		 2221 case VIDIOC_SUBDEV_G_EDID:
2222 case VIDIOC_SUBDEV_S_EDID: {
2223 struct v4l2_subdev_edid *edid = parg;
2224
2225 if (edid->blocks) {
1b8b10cc
HV		 2226 if (edid->blocks > 256) {
2227 ret = -EINVAL;
2228 break;
2229 }
ed45ce2c
HV		 2230 *user_ptr = (void __user *)edid->edid;
2231 *kernel_ptr = (void *)&edid->edid;
2232 *array_size = edid->blocks * 128;
2233 ret = 1;
2234 }
2235 break;
2236 }
2237
d14e6d76
PO		 2238 case VIDIOC_S_EXT_CTRLS:
2239 case VIDIOC_G_EXT_CTRLS:
2240 case VIDIOC_TRY_EXT_CTRLS: {
2241 struct v4l2_ext_controls *ctrls = parg;
2242
2243 if (ctrls->count != 0) {
6c06108b
DC		 2244 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2245 ret = -EINVAL;
2246 break;
2247 }
d14e6d76 2248 *user_ptr = (void __user *)ctrls->controls;
2ef40370 2249 *kernel_ptr = (void *)&ctrls->controls;
d14e6d76
PO		 2250 *array_size = sizeof(struct v4l2_ext_control)
2251 * ctrls->count;
2252 ret = 1;
2253 }
2254 break;
2255 }
2256 }
2257
2258 return ret;
2259}
2260
fc0a8079
LP		 2261long
2262video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2263 v4l2_kioctl func)
35ea11ff
HV		 2264{
2265 char sbuf[128];
2266 void *mbuf = NULL;
1d94aa36 2267 void *parg = (void *)arg;
069b7479 2268 long err = -EINVAL;
d14e6d76
PO		 2269 bool has_array_args;
2270 size_t array_size = 0;
35ea11ff 2271 void __user *user_ptr = NULL;
d14e6d76 2272 void **kernel_ptr = NULL;
35ea11ff 2273
35ea11ff 2274 /* Copy arguments into temp kernel buffer */
337f9d20 2275 if (_IOC_DIR(cmd) != _IOC_NONE) {
35ea11ff
HV		 2276 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2277 parg = sbuf;
2278 } else {
2279 /* too big to allocate from stack */
2280 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2281 if (NULL == mbuf)
2282 return -ENOMEM;
2283 parg = mbuf;
2284 }
2285
2286 err = -EFAULT;
19c96e4b 2287 if (_IOC_DIR(cmd) & _IOC_WRITE) {
27cd2aba
HV		 2288 unsigned int n = _IOC_SIZE(cmd);
2289
2290 /*
2291 * In some cases, only a few fields are used as input,
2292 * i.e. when the app sets "index" and then the driver
2293 * fills in the rest of the structure for the thing
2294 * with that index. We only need to copy up the first
2295 * non-input field.
2296 */
2297 if (v4l2_is_known_ioctl(cmd)) {
2298 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2299 if (flags & INFO_FL_CLEAR_MASK)
2300 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2301 }
19c96e4b
TP		 2302
2303 if (copy_from_user(parg, (void __user *)arg, n))
35ea11ff 2304 goto out;
19c96e4b
TP		 2305
2306 /* zero out anything we don't copy from userspace */
2307 if (n < _IOC_SIZE(cmd))
2308 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
337f9d20
TP		 2309 } else {
2310 /* read-only ioctl */
2311 memset(parg, 0, _IOC_SIZE(cmd));
19c96e4b 2312 }
35ea11ff
HV		 2313 }
2314
d14e6d76
PO		 2315 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2316 if (err < 0)
2317 goto out;
2318 has_array_args = err;
35ea11ff 2319
d14e6d76
PO		 2320 if (has_array_args) {
2321 /*
2322 * When adding new types of array args, make sure that the
2323 * parent argument to ioctl (which contains the pointer to the
2324 * array) fits into sbuf (so that mbuf will still remain
2325 * unused up to here).
2326 */
2327 mbuf = kmalloc(array_size, GFP_KERNEL);
2328 err = -ENOMEM;
2329 if (NULL == mbuf)
2330 goto out_array_args;
2331 err = -EFAULT;
2332 if (copy_from_user(mbuf, user_ptr, array_size))
2333 goto out_array_args;
2334 *kernel_ptr = mbuf;
35ea11ff
HV		 2335 }
2336
2337 /* Handles IOCTL */
fc0a8079 2338 err = func(file, cmd, parg);
35ea11ff 2339 if (err == -ENOIOCTLCMD)
02bbb814 2340 err = -ENOTTY;
35ea11ff 2341
d14e6d76
PO		 2342 if (has_array_args) {
2343 *kernel_ptr = user_ptr;
2344 if (copy_to_user(user_ptr, mbuf, array_size))
35ea11ff 2345 err = -EFAULT;
d14e6d76 2346 goto out_array_args;
35ea11ff 2347 }
5d7758ee
HV		 2348 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2349 results that must be returned. */
2350 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
35ea11ff
HV		 2351 goto out;
2352
d14e6d76 2353out_array_args:
35ea11ff
HV		 2354 /* Copy results into user buffer */
2355 switch (_IOC_DIR(cmd)) {
2356 case _IOC_READ:
2357 case (_IOC_WRITE | _IOC_READ):
2358 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2359 err = -EFAULT;
2360 break;
2361 }
2362
2363out:
2364 kfree(mbuf);
2365 return err;
2366}
fc0a8079
LP		 2367EXPORT_SYMBOL(video_usercopy);
2368
2369long video_ioctl2(struct file *file,
2370 unsigned int cmd, unsigned long arg)
2371{
2372 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2373}
8a522c91 2374EXPORT_SYMBOL(video_ioctl2);
Linux 6.x block layer and io_uring tree(s)