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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
80b36e0f 29#include <media/v4l2-chip-ident.h>
5a5adf6b 30#include <media/videobuf2-core.h>
35ea11ff 31
25985edc 32/* Zero out the end of the struct pointed to by p. Everything after, but
7ecc0cf9
TP		 33 * not including, the specified field is cleared. */
34#define CLEAR_AFTER_FIELD(p, field) \
35 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
36 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
37
73f35418
HV		 38#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
39
35ea11ff
HV		 40struct std_descr {
41 v4l2_std_id std;
42 const char *descr;
43};
44
45static const struct std_descr standards[] = {
46 { V4L2_STD_NTSC, "NTSC" },
47 { V4L2_STD_NTSC_M, "NTSC-M" },
48 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
49 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
50 { V4L2_STD_NTSC_443, "NTSC-443" },
51 { V4L2_STD_PAL, "PAL" },
52 { V4L2_STD_PAL_BG, "PAL-BG" },
53 { V4L2_STD_PAL_B, "PAL-B" },
54 { V4L2_STD_PAL_B1, "PAL-B1" },
55 { V4L2_STD_PAL_G, "PAL-G" },
56 { V4L2_STD_PAL_H, "PAL-H" },
57 { V4L2_STD_PAL_I, "PAL-I" },
58 { V4L2_STD_PAL_DK, "PAL-DK" },
59 { V4L2_STD_PAL_D, "PAL-D" },
60 { V4L2_STD_PAL_D1, "PAL-D1" },
61 { V4L2_STD_PAL_K, "PAL-K" },
62 { V4L2_STD_PAL_M, "PAL-M" },
63 { V4L2_STD_PAL_N, "PAL-N" },
64 { V4L2_STD_PAL_Nc, "PAL-Nc" },
65 { V4L2_STD_PAL_60, "PAL-60" },
66 { V4L2_STD_SECAM, "SECAM" },
67 { V4L2_STD_SECAM_B, "SECAM-B" },
68 { V4L2_STD_SECAM_G, "SECAM-G" },
69 { V4L2_STD_SECAM_H, "SECAM-H" },
70 { V4L2_STD_SECAM_DK, "SECAM-DK" },
71 { V4L2_STD_SECAM_D, "SECAM-D" },
72 { V4L2_STD_SECAM_K, "SECAM-K" },
73 { V4L2_STD_SECAM_K1, "SECAM-K1" },
74 { V4L2_STD_SECAM_L, "SECAM-L" },
75 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
76 { 0, "Unknown" }
77};
78
79/* video4linux standard ID conversion to standard name
80 */
81const char *v4l2_norm_to_name(v4l2_std_id id)
82{
83 u32 myid = id;
84 int i;
85
86 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
87 64 bit comparations. So, on that architecture, with some gcc
88 variants, compilation fails. Currently, the max value is 30bit wide.
89 */
90 BUG_ON(myid != id);
91
92 for (i = 0; standards[i].std; i++)
93 if (myid == standards[i].std)
94 break;
95 return standards[i].descr;
96}
97EXPORT_SYMBOL(v4l2_norm_to_name);
98
51f0b8d5
TP		 99/* Returns frame period for the given standard */
100void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
101{
102 if (id & V4L2_STD_525_60) {
103 frameperiod->numerator = 1001;
104 frameperiod->denominator = 30000;
105 } else {
106 frameperiod->numerator = 1;
107 frameperiod->denominator = 25;
108 }
109}
110EXPORT_SYMBOL(v4l2_video_std_frame_period);
111
35ea11ff
HV		 112/* Fill in the fields of a v4l2_standard structure according to the
113 'id' and 'transmission' parameters. Returns negative on error. */
114int v4l2_video_std_construct(struct v4l2_standard *vs,
115 int id, const char *name)
116{
51f0b8d5
TP		 117 vs->id = id;
118 v4l2_video_std_frame_period(id, &vs->frameperiod);
119 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
35ea11ff
HV		 120 strlcpy(vs->name, name, sizeof(vs->name));
121 return 0;
122}
123EXPORT_SYMBOL(v4l2_video_std_construct);
124
125/* ----------------------------------------------------------------- */
126/* some arrays for pretty-printing debug messages of enum types */
127
128const char *v4l2_field_names[] = {
129 [V4L2_FIELD_ANY] = "any",
130 [V4L2_FIELD_NONE] = "none",
131 [V4L2_FIELD_TOP] = "top",
132 [V4L2_FIELD_BOTTOM] = "bottom",
133 [V4L2_FIELD_INTERLACED] = "interlaced",
134 [V4L2_FIELD_SEQ_TB] = "seq-tb",
135 [V4L2_FIELD_SEQ_BT] = "seq-bt",
136 [V4L2_FIELD_ALTERNATE] = "alternate",
137 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
138 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
139};
140EXPORT_SYMBOL(v4l2_field_names);
141
142const char *v4l2_type_names[] = {
143 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
144 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
145 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
146 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
147 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
148 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
149 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
150 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
f8f3914c
PO		 151 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
35ea11ff
HV		 153};
154EXPORT_SYMBOL(v4l2_type_names);
155
156static const char *v4l2_memory_names[] = {
157 [V4L2_MEMORY_MMAP] = "mmap",
158 [V4L2_MEMORY_USERPTR] = "userptr",
159 [V4L2_MEMORY_OVERLAY] = "overlay",
051c7788 160 [V4L2_MEMORY_DMABUF] = "dmabuf",
35ea11ff
HV		 161};
162
d9246240 163#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
35ea11ff
HV		 164
165/* ------------------------------------------------------------------ */
166/* debug help functions */
8ab75e3e 167
59076122
HV		 168static void v4l_print_querycap(const void *arg, bool write_only)
169{
170 const struct v4l2_capability *p = arg;
171
27d5a87c 172 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
59076122 173 "capabilities=0x%08x, device_caps=0x%08x\n",
27d5a87c
HV		 174 (int)sizeof(p->driver), p->driver,
175 (int)sizeof(p->card), p->card,
176 (int)sizeof(p->bus_info), p->bus_info,
59076122
HV		 177 p->version, p->capabilities, p->device_caps);
178}
179
180static void v4l_print_enuminput(const void *arg, bool write_only)
181{
182 const struct v4l2_input *p = arg;
183
27d5a87c 184 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
59076122 185 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
27d5a87c
HV		 186 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
187 p->tuner, (unsigned long long)p->std, p->status,
188 p->capabilities);
59076122
HV		 189}
190
191static void v4l_print_enumoutput(const void *arg, bool write_only)
192{
193 const struct v4l2_output *p = arg;
194
27d5a87c 195 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
59076122 196 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
27d5a87c
HV		 197 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
198 p->modulator, (unsigned long long)p->std, p->capabilities);
59076122
HV		 199}
200
201static void v4l_print_audio(const void *arg, bool write_only)
202{
203 const struct v4l2_audio *p = arg;
204
205 if (write_only)
206 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
207 else
27d5a87c
HV		 208 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
209 p->index, (int)sizeof(p->name), p->name,
210 p->capability, p->mode);
59076122
HV		 211}
212
213static void v4l_print_audioout(const void *arg, bool write_only)
214{
215 const struct v4l2_audioout *p = arg;
216
217 if (write_only)
218 pr_cont("index=%u\n", p->index);
219 else
27d5a87c
HV		 220 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
221 p->index, (int)sizeof(p->name), p->name,
222 p->capability, p->mode);
59076122
HV		 223}
224
be6c64e4
HV		 225static void v4l_print_fmtdesc(const void *arg, bool write_only)
226{
227 const struct v4l2_fmtdesc *p = arg;
228
27d5a87c 229 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
be6c64e4
HV		 230 p->index, prt_names(p->type, v4l2_type_names),
231 p->flags, (p->pixelformat & 0xff),
232 (p->pixelformat >> 8) & 0xff,
233 (p->pixelformat >> 16) & 0xff,
234 (p->pixelformat >> 24) & 0xff,
27d5a87c 235 (int)sizeof(p->description), p->description);
be6c64e4
HV		 236}
237
238static void v4l_print_format(const void *arg, bool write_only)
239{
240 const struct v4l2_format *p = arg;
241 const struct v4l2_pix_format *pix;
242 const struct v4l2_pix_format_mplane *mp;
243 const struct v4l2_vbi_format *vbi;
244 const struct v4l2_sliced_vbi_format *sliced;
245 const struct v4l2_window *win;
be6c64e4
HV		 246 unsigned i;
247
248 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
249 switch (p->type) {
250 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
251 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
252 pix = &p->fmt.pix;
253 pr_cont(", width=%u, height=%u, "
254 "pixelformat=%c%c%c%c, field=%s, "
560dde24 255 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
be6c64e4
HV		 256 pix->width, pix->height,
257 (pix->pixelformat & 0xff),
258 (pix->pixelformat >> 8) & 0xff,
259 (pix->pixelformat >> 16) & 0xff,
260 (pix->pixelformat >> 24) & 0xff,
261 prt_names(pix->field, v4l2_field_names),
262 pix->bytesperline, pix->sizeimage,
263 pix->colorspace);
264 break;
265 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
266 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
267 mp = &p->fmt.pix_mp;
268 pr_cont(", width=%u, height=%u, "
269 "format=%c%c%c%c, field=%s, "
270 "colorspace=%d, num_planes=%u\n",
271 mp->width, mp->height,
272 (mp->pixelformat & 0xff),
273 (mp->pixelformat >> 8) & 0xff,
274 (mp->pixelformat >> 16) & 0xff,
275 (mp->pixelformat >> 24) & 0xff,
276 prt_names(mp->field, v4l2_field_names),
277 mp->colorspace, mp->num_planes);
278 for (i = 0; i < mp->num_planes; i++)
279 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
280 mp->plane_fmt[i].bytesperline,
281 mp->plane_fmt[i].sizeimage);
282 break;
283 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
284 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
285 win = &p->fmt.win;
560dde24
HV		 286 /* Note: we can't print the clip list here since the clips
287 * pointer is a userspace pointer, not a kernelspace
288 * pointer. */
289 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",
290 win->w.width, win->w.height, win->w.left, win->w.top,
be6c64e4 291 prt_names(win->field, v4l2_field_names),
560dde24
HV		 292 win->chromakey, win->clipcount, win->clips,
293 win->bitmap, win->global_alpha);
be6c64e4
HV		 294 break;
295 case V4L2_BUF_TYPE_VBI_CAPTURE:
296 case V4L2_BUF_TYPE_VBI_OUTPUT:
297 vbi = &p->fmt.vbi;
298 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
299 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
300 vbi->sampling_rate, vbi->offset,
301 vbi->samples_per_line,
302 (vbi->sample_format & 0xff),
303 (vbi->sample_format >> 8) & 0xff,
304 (vbi->sample_format >> 16) & 0xff,
305 (vbi->sample_format >> 24) & 0xff,
306 vbi->start[0], vbi->start[1],
307 vbi->count[0], vbi->count[1]);
308 break;
309 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
310 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
311 sliced = &p->fmt.sliced;
312 pr_cont(", service_set=0x%08x, io_size=%d\n",
313 sliced->service_set, sliced->io_size);
314 for (i = 0; i < 24; i++)
315 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
316 sliced->service_lines[0][i],
317 sliced->service_lines[1][i]);
318 break;
be6c64e4
HV		 319 }
320}
321
322static void v4l_print_framebuffer(const void *arg, bool write_only)
323{
324 const struct v4l2_framebuffer *p = arg;
325
326 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
327 "height=%u, pixelformat=%c%c%c%c, "
560dde24 328 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
be6c64e4
HV		 329 p->capability, p->flags, p->base,
330 p->fmt.width, p->fmt.height,
331 (p->fmt.pixelformat & 0xff),
332 (p->fmt.pixelformat >> 8) & 0xff,
333 (p->fmt.pixelformat >> 16) & 0xff,
334 (p->fmt.pixelformat >> 24) & 0xff,
335 p->fmt.bytesperline, p->fmt.sizeimage,
336 p->fmt.colorspace);
337}
338
e325b244
HV		 339static void v4l_print_buftype(const void *arg, bool write_only)
340{
341 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
342}
343
4b1e2e4d
HV		 344static void v4l_print_modulator(const void *arg, bool write_only)
345{
346 const struct v4l2_modulator *p = arg;
347
348 if (write_only)
560dde24 349 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
4b1e2e4d 350 else
27d5a87c 351 pr_cont("index=%u, name=%.*s, capability=0x%x, "
4b1e2e4d 352 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
27d5a87c 353 p->index, (int)sizeof(p->name), p->name, p->capability,
4b1e2e4d
HV		 354 p->rangelow, p->rangehigh, p->txsubchans);
355}
356
357static void v4l_print_tuner(const void *arg, bool write_only)
358{
359 const struct v4l2_tuner *p = arg;
360
361 if (write_only)
362 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
363 else
27d5a87c 364 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
4b1e2e4d
HV		 365 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
366 "rxsubchans=0x%x, audmode=%u\n",
27d5a87c 367 p->index, (int)sizeof(p->name), p->name, p->type,
4b1e2e4d
HV		 368 p->capability, p->rangelow,
369 p->rangehigh, p->signal, p->afc,
370 p->rxsubchans, p->audmode);
371}
372
373static void v4l_print_frequency(const void *arg, bool write_only)
374{
375 const struct v4l2_frequency *p = arg;
376
377 pr_cont("tuner=%u, type=%u, frequency=%u\n",
378 p->tuner, p->type, p->frequency);
379}
380
381static void v4l_print_standard(const void *arg, bool write_only)
382{
383 const struct v4l2_standard *p = arg;
384
27d5a87c 385 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
4b1e2e4d 386 "framelines=%u\n", p->index,
27d5a87c 387 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
4b1e2e4d
HV		 388 p->frameperiod.numerator,
389 p->frameperiod.denominator,
390 p->framelines);
391}
392
393static void v4l_print_std(const void *arg, bool write_only)
394{
395 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
396}
397
398static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
399{
400 const struct v4l2_hw_freq_seek *p = arg;
401
5e788317
HV		 402 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
403 "rangelow=%u, rangehigh=%u\n",
404 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
405 p->rangelow, p->rangehigh);
4b1e2e4d
HV		 406}
407
eb3728ed 408static void v4l_print_requestbuffers(const void *arg, bool write_only)
59076122 409{
eb3728ed
HV		 410 const struct v4l2_requestbuffers *p = arg;
411
412 pr_cont("count=%d, type=%s, memory=%s\n",
413 p->count,
414 prt_names(p->type, v4l2_type_names),
415 prt_names(p->memory, v4l2_memory_names));
59076122
HV		 416}
417
eb3728ed 418static void v4l_print_buffer(const void *arg, bool write_only)
35ea11ff 419{
eb3728ed
HV		 420 const struct v4l2_buffer *p = arg;
421 const struct v4l2_timecode *tc = &p->timecode;
422 const struct v4l2_plane *plane;
d14e6d76 423 int i;
35ea11ff 424
eb3728ed
HV		 425 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
426 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
35ea11ff
HV		 427 p->timestamp.tv_sec / 3600,
428 (int)(p->timestamp.tv_sec / 60) % 60,
429 (int)(p->timestamp.tv_sec % 60),
b045979d 430 (long)p->timestamp.tv_usec,
35ea11ff
HV		 431 p->index,
432 prt_names(p->type, v4l2_type_names),
eb3728ed
HV		 433 p->flags, prt_names(p->field, v4l2_field_names),
434 p->sequence, prt_names(p->memory, v4l2_memory_names));
d14e6d76
PO		 435
436 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
eb3728ed 437 pr_cont("\n");
d14e6d76
PO		 438 for (i = 0; i < p->length; ++i) {
439 plane = &p->m.planes[i];
eb3728ed 440 printk(KERN_DEBUG
560dde24 441 "plane %d: bytesused=%d, data_offset=0x%08x, "
eb3728ed 442 "offset/userptr=0x%lx, length=%d\n",
d14e6d76
PO		 443 i, plane->bytesused, plane->data_offset,
444 plane->m.userptr, plane->length);
445 }
446 } else {
560dde24 447 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
d14e6d76
PO		 448 p->bytesused, p->m.userptr, p->length);
449 }
450
eb3728ed
HV		 451 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
452 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
35ea11ff
HV		 453 tc->hours, tc->minutes, tc->seconds,
454 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
455}
456
b799d09a
TS		 457static void v4l_print_exportbuffer(const void *arg, bool write_only)
458{
459 const struct v4l2_exportbuffer *p = arg;
460
461 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
462 p->fd, prt_names(p->type, v4l2_type_names),
463 p->index, p->plane, p->flags);
464}
465
eb3728ed
HV		 466static void v4l_print_create_buffers(const void *arg, bool write_only)
467{
468 const struct v4l2_create_buffers *p = arg;
469
470 pr_cont("index=%d, count=%d, memory=%s, ",
471 p->index, p->count,
472 prt_names(p->memory, v4l2_memory_names));
473 v4l_print_format(&p->format, write_only);
474}
475
476static void v4l_print_streamparm(const void *arg, bool write_only)
477{
478 const struct v4l2_streamparm *p = arg;
479
480 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
481
482 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
483 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
484 const struct v4l2_captureparm *c = &p->parm.capture;
485
486 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
487 "extendedmode=%d, readbuffers=%d\n",
488 c->capability, c->capturemode,
489 c->timeperframe.numerator, c->timeperframe.denominator,
490 c->extendedmode, c->readbuffers);
491 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
492 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
493 const struct v4l2_outputparm *c = &p->parm.output;
494
495 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
496 "extendedmode=%d, writebuffers=%d\n",
497 c->capability, c->outputmode,
498 c->timeperframe.numerator, c->timeperframe.denominator,
499 c->extendedmode, c->writebuffers);
560dde24
HV		 500 } else {
501 pr_cont("\n");
eb3728ed
HV		 502 }
503}
504
efbceecd
HV		 505static void v4l_print_queryctrl(const void *arg, bool write_only)
506{
507 const struct v4l2_queryctrl *p = arg;
508
27d5a87c 509 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
efbceecd 510 "step=%d, default=%d, flags=0x%08x\n",
27d5a87c 511 p->id, p->type, (int)sizeof(p->name), p->name,
efbceecd
HV		 512 p->minimum, p->maximum,
513 p->step, p->default_value, p->flags);
514}
515
516static void v4l_print_querymenu(const void *arg, bool write_only)
517{
518 const struct v4l2_querymenu *p = arg;
519
520 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
521}
522
523static void v4l_print_control(const void *arg, bool write_only)
524{
525 const struct v4l2_control *p = arg;
526
527 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
528}
529
530static void v4l_print_ext_controls(const void *arg, bool write_only)
531{
532 const struct v4l2_ext_controls *p = arg;
533 int i;
534
535 pr_cont("class=0x%x, count=%d, error_idx=%d",
536 p->ctrl_class, p->count, p->error_idx);
537 for (i = 0; i < p->count; i++) {
538 if (p->controls[i].size)
539 pr_cont(", id/val=0x%x/0x%x",
540 p->controls[i].id, p->controls[i].value);
541 else
542 pr_cont(", id/size=0x%x/%u",
543 p->controls[i].id, p->controls[i].size);
544 }
545 pr_cont("\n");
546}
547
d84f2d94 548static void v4l_print_cropcap(const void *arg, bool write_only)
eb3728ed 549{
d84f2d94
HV		 550 const struct v4l2_cropcap *p = arg;
551
552 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
553 "defrect wxh=%dx%d, x,y=%d,%d\n, "
554 "pixelaspect %d/%d\n",
555 prt_names(p->type, v4l2_type_names),
556 p->bounds.width, p->bounds.height,
557 p->bounds.left, p->bounds.top,
558 p->defrect.width, p->defrect.height,
559 p->defrect.left, p->defrect.top,
560 p->pixelaspect.numerator, p->pixelaspect.denominator);
eb3728ed
HV		 561}
562
d84f2d94 563static void v4l_print_crop(const void *arg, bool write_only)
35ea11ff 564{
d84f2d94
HV		 565 const struct v4l2_crop *p = arg;
566
567 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
568 prt_names(p->type, v4l2_type_names),
569 p->c.width, p->c.height,
570 p->c.left, p->c.top);
571}
572
573static void v4l_print_selection(const void *arg, bool write_only)
574{
575 const struct v4l2_selection *p = arg;
576
577 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
578 prt_names(p->type, v4l2_type_names),
579 p->target, p->flags,
580 p->r.width, p->r.height, p->r.left, p->r.top);
581}
582
d806f2df
HV		 583static void v4l_print_jpegcompression(const void *arg, bool write_only)
584{
585 const struct v4l2_jpegcompression *p = arg;
586
587 pr_cont("quality=%d, APPn=%d, APP_len=%d, "
588 "COM_len=%d, jpeg_markers=0x%x\n",
589 p->quality, p->APPn, p->APP_len,
590 p->COM_len, p->jpeg_markers);
591}
592
593static void v4l_print_enc_idx(const void *arg, bool write_only)
594{
595 const struct v4l2_enc_idx *p = arg;
596
597 pr_cont("entries=%d, entries_cap=%d\n",
598 p->entries, p->entries_cap);
599}
600
601static void v4l_print_encoder_cmd(const void *arg, bool write_only)
602{
603 const struct v4l2_encoder_cmd *p = arg;
604
605 pr_cont("cmd=%d, flags=0x%x\n",
606 p->cmd, p->flags);
607}
608
609static void v4l_print_decoder_cmd(const void *arg, bool write_only)
610{
611 const struct v4l2_decoder_cmd *p = arg;
612
613 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
614
615 if (p->cmd == V4L2_DEC_CMD_START)
616 pr_info("speed=%d, format=%u\n",
617 p->start.speed, p->start.format);
618 else if (p->cmd == V4L2_DEC_CMD_STOP)
619 pr_info("pts=%llu\n", p->stop.pts);
620}
621
f16f77b0
HV		 622static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
623{
624 const struct v4l2_dbg_chip_ident *p = arg;
625
626 pr_cont("type=%u, ", p->match.type);
3eef2510 627 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
27d5a87c
HV		 628 pr_cont("name=%.*s, ",
629 (int)sizeof(p->match.name), p->match.name);
f16f77b0
HV		 630 else
631 pr_cont("addr=%u, ", p->match.addr);
632 pr_cont("chip_ident=%u, revision=0x%x\n",
633 p->ident, p->revision);
634}
635
96b03d2a 636static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
79b0c640 637{
96b03d2a 638 const struct v4l2_dbg_chip_info *p = arg;
79b0c640
HV		 639
640 pr_cont("type=%u, ", p->match.type);
3eef2510 641 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
79b0c640
HV		 642 pr_cont("name=%.*s, ",
643 (int)sizeof(p->match.name), p->match.name);
644 else
645 pr_cont("addr=%u, ", p->match.addr);
646 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
647}
648
f16f77b0
HV		 649static void v4l_print_dbg_register(const void *arg, bool write_only)
650{
651 const struct v4l2_dbg_register *p = arg;
652
653 pr_cont("type=%u, ", p->match.type);
3eef2510 654 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
27d5a87c
HV		 655 pr_cont("name=%.*s, ",
656 (int)sizeof(p->match.name), p->match.name);
f16f77b0
HV		 657 else
658 pr_cont("addr=%u, ", p->match.addr);
659 pr_cont("reg=0x%llx, val=0x%llx\n",
660 p->reg, p->val);
661}
662
efc626b0 663static void v4l_print_dv_timings(const void *arg, bool write_only)
5d7758ee 664{
efc626b0
HV		 665 const struct v4l2_dv_timings *p = arg;
666
5d7758ee
HV		 667 switch (p->type) {
668 case V4L2_DV_BT_656_1120:
efc626b0
HV		 669 pr_cont("type=bt-656/1120, interlaced=%u, "
670 "pixelclock=%llu, "
671 "width=%u, height=%u, polarities=0x%x, "
672 "hfrontporch=%u, hsync=%u, "
673 "hbackporch=%u, vfrontporch=%u, "
674 "vsync=%u, vbackporch=%u, "
675 "il_vfrontporch=%u, il_vsync=%u, "
676 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
5d7758ee
HV		 677 p->bt.interlaced, p->bt.pixelclock,
678 p->bt.width, p->bt.height,
679 p->bt.polarities, p->bt.hfrontporch,
680 p->bt.hsync, p->bt.hbackporch,
681 p->bt.vfrontporch, p->bt.vsync,
682 p->bt.vbackporch, p->bt.il_vfrontporch,
683 p->bt.il_vsync, p->bt.il_vbackporch,
684 p->bt.standards, p->bt.flags);
685 break;
686 default:
efc626b0 687 pr_cont("type=%d\n", p->type);
5d7758ee
HV		 688 break;
689 }
690}
691
efc626b0
HV		 692static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
693{
694 const struct v4l2_enum_dv_timings *p = arg;
695
696 pr_cont("index=%u, ", p->index);
697 v4l_print_dv_timings(&p->timings, write_only);
698}
699
700static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
701{
702 const struct v4l2_dv_timings_cap *p = arg;
703
704 switch (p->type) {
705 case V4L2_DV_BT_656_1120:
706 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
707 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
708 p->bt.min_width, p->bt.max_width,
709 p->bt.min_height, p->bt.max_height,
710 p->bt.min_pixelclock, p->bt.max_pixelclock,
711 p->bt.standards, p->bt.capabilities);
712 break;
713 default:
714 pr_cont("type=%u\n", p->type);
715 break;
716 }
717}
718
458aa4a6
HV		 719static void v4l_print_frmsizeenum(const void *arg, bool write_only)
720{
721 const struct v4l2_frmsizeenum *p = arg;
722
723 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
724 p->index,
725 (p->pixel_format & 0xff),
726 (p->pixel_format >> 8) & 0xff,
727 (p->pixel_format >> 16) & 0xff,
728 (p->pixel_format >> 24) & 0xff,
729 p->type);
730 switch (p->type) {
731 case V4L2_FRMSIZE_TYPE_DISCRETE:
560dde24 732 pr_cont(", wxh=%ux%u\n",
458aa4a6
HV		 733 p->discrete.width, p->discrete.height);
734 break;
735 case V4L2_FRMSIZE_TYPE_STEPWISE:
560dde24 736 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
458aa4a6
HV		 737 p->stepwise.min_width, p->stepwise.min_height,
738 p->stepwise.step_width, p->stepwise.step_height,
739 p->stepwise.max_width, p->stepwise.max_height);
740 break;
741 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
742 /* fall through */
743 default:
744 pr_cont("\n");
745 break;
746 }
747}
748
749static void v4l_print_frmivalenum(const void *arg, bool write_only)
750{
751 const struct v4l2_frmivalenum *p = arg;
752
753 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
754 p->index,
755 (p->pixel_format & 0xff),
756 (p->pixel_format >> 8) & 0xff,
757 (p->pixel_format >> 16) & 0xff,
758 (p->pixel_format >> 24) & 0xff,
759 p->width, p->height, p->type);
760 switch (p->type) {
761 case V4L2_FRMIVAL_TYPE_DISCRETE:
560dde24 762 pr_cont(", fps=%d/%d\n",
458aa4a6
HV		 763 p->discrete.numerator,
764 p->discrete.denominator);
765 break;
766 case V4L2_FRMIVAL_TYPE_STEPWISE:
560dde24 767 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
458aa4a6
HV		 768 p->stepwise.min.numerator,
769 p->stepwise.min.denominator,
770 p->stepwise.max.numerator,
771 p->stepwise.max.denominator,
772 p->stepwise.step.numerator,
773 p->stepwise.step.denominator);
774 break;
775 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
776 /* fall through */
777 default:
778 pr_cont("\n");
779 break;
780 }
781}
782
783static void v4l_print_event(const void *arg, bool write_only)
784{
785 const struct v4l2_event *p = arg;
786 const struct v4l2_event_ctrl *c;
787
788 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
789 "timestamp=%lu.%9.9lu\n",
790 p->type, p->pending, p->sequence, p->id,
791 p->timestamp.tv_sec, p->timestamp.tv_nsec);
792 switch (p->type) {
793 case V4L2_EVENT_VSYNC:
794 printk(KERN_DEBUG "field=%s\n",
795 prt_names(p->u.vsync.field, v4l2_field_names));
796 break;
797 case V4L2_EVENT_CTRL:
798 c = &p->u.ctrl;
799 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
800 c->changes, c->type);
801 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
802 pr_cont("value64=%lld, ", c->value64);
803 else
804 pr_cont("value=%d, ", c->value);
560dde24
HV		 805 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
806 "default_value=%d\n",
458aa4a6
HV		 807 c->flags, c->minimum, c->maximum,
808 c->step, c->default_value);
809 break;
810 case V4L2_EVENT_FRAME_SYNC:
811 pr_cont("frame_sequence=%u\n",
812 p->u.frame_sync.frame_sequence);
813 break;
814 }
815}
816
817static void v4l_print_event_subscription(const void *arg, bool write_only)
818{
819 const struct v4l2_event_subscription *p = arg;
820
821 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
822 p->type, p->id, p->flags);
823}
824
825static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
826{
827 const struct v4l2_sliced_vbi_cap *p = arg;
828 int i;
829
830 pr_cont("type=%s, service_set=0x%08x\n",
831 prt_names(p->type, v4l2_type_names), p->service_set);
832 for (i = 0; i < 24; i++)
833 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
834 p->service_lines[0][i],
835 p->service_lines[1][i]);
836}
837
82b655bf
HV		 838static void v4l_print_freq_band(const void *arg, bool write_only)
839{
840 const struct v4l2_frequency_band *p = arg;
841
842 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
560dde24 843 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
82b655bf
HV		 844 p->tuner, p->type, p->index,
845 p->capability, p->rangelow,
846 p->rangehigh, p->modulation);
847}
848
efc626b0
HV		 849static void v4l_print_u32(const void *arg, bool write_only)
850{
851 pr_cont("value=%u\n", *(const u32 *)arg);
852}
853
854static void v4l_print_newline(const void *arg, bool write_only)
855{
856 pr_cont("\n");
857}
858
f18d8e07
HV		 859static void v4l_print_default(const void *arg, bool write_only)
860{
861 pr_cont("driver-specific ioctl\n");
862}
863
efbceecd 864static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
35ea11ff
HV		 865{
866 __u32 i;
867
868 /* zero the reserved fields */
869 c->reserved[0] = c->reserved[1] = 0;
6b5a9492 870 for (i = 0; i < c->count; i++)
35ea11ff 871 c->controls[i].reserved2[0] = 0;
6b5a9492 872
35ea11ff
HV		 873 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
874 when using extended controls.
875 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
876 is it allowed for backwards compatibility.
877 */
878 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
879 return 0;
880 /* Check that all controls are from the same control class. */
881 for (i = 0; i < c->count; i++) {
882 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
883 c->error_idx = i;
884 return 0;
885 }
886 }
887 return 1;
888}
889
4b20259f 890static int check_fmt(struct file *file, enum v4l2_buf_type type)
35ea11ff 891{
4b20259f
HV		 892 struct video_device *vfd = video_devdata(file);
893 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
894 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
895 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
896 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
897 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
898
a399810c
HV		 899 if (ops == NULL)
900 return -EINVAL;
901
35ea11ff
HV		 902 switch (type) {
903 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f
HV		 904 if (is_vid && is_rx &&
905 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
d14e6d76
PO		 906 return 0;
907 break;
908 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 909 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
35ea11ff
HV		 910 return 0;
911 break;
912 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 913 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
35ea11ff
HV		 914 return 0;
915 break;
916 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f
HV		 917 if (is_vid && is_tx &&
918 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
d14e6d76
PO		 919 return 0;
920 break;
921 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 922 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
35ea11ff
HV		 923 return 0;
924 break;
925 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 926 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
35ea11ff
HV		 927 return 0;
928 break;
929 case V4L2_BUF_TYPE_VBI_CAPTURE:
4b20259f 930 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
35ea11ff
HV		 931 return 0;
932 break;
933 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 934 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
35ea11ff
HV		 935 return 0;
936 break;
937 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
4b20259f 938 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
35ea11ff
HV		 939 return 0;
940 break;
941 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 942 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
35ea11ff
HV		 943 return 0;
944 break;
633c98e5 945 default:
35ea11ff
HV		 946 break;
947 }
948 return -EINVAL;
949}
950
59076122
HV		 951static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
952 struct file *file, void *fh, void *arg)
953{
954 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
955
956 cap->version = LINUX_VERSION_CODE;
957 return ops->vidioc_querycap(file, fh, cap);
958}
959
960static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
961 struct file *file, void *fh, void *arg)
962{
963 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
964}
965
966static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
967 struct file *file, void *fh, void *arg)
968{
969 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
970}
971
d0547cba
HV		 972static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
973 struct file *file, void *fh, void *arg)
974{
975 struct video_device *vfd;
976 u32 *p = arg;
977
978 if (ops->vidioc_g_priority)
979 return ops->vidioc_g_priority(file, fh, arg);
980 vfd = video_devdata(file);
981 *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
982 return 0;
983}
984
985static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
986 struct file *file, void *fh, void *arg)
987{
988 struct video_device *vfd;
989 struct v4l2_fh *vfh;
990 u32 *p = arg;
991
992 if (ops->vidioc_s_priority)
993 return ops->vidioc_s_priority(file, fh, *p);
994 vfd = video_devdata(file);
995 vfh = file->private_data;
996 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
997}
998
59076122
HV		 999static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1000 struct file *file, void *fh, void *arg)
1001{
73f35418 1002 struct video_device *vfd = video_devdata(file);
59076122
HV		 1003 struct v4l2_input *p = arg;
1004
1005 /*
02fa6282 1006 * We set the flags for CAP_DV_TIMINGS &
59076122
HV		 1007 * CAP_STD here based on ioctl handler provided by the
1008 * driver. If the driver doesn't support these
1009 * for a specific input, it must override these flags.
1010 */
73f35418 1011 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
59076122 1012 p->capabilities |= V4L2_IN_CAP_STD;
59076122
HV		 1013
1014 return ops->vidioc_enum_input(file, fh, p);
1015}
1016
1017static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1018 struct file *file, void *fh, void *arg)
1019{
73f35418 1020 struct video_device *vfd = video_devdata(file);
59076122
HV		 1021 struct v4l2_output *p = arg;
1022
1023 /*
02fa6282 1024 * We set the flags for CAP_DV_TIMINGS &
59076122
HV		 1025 * CAP_STD here based on ioctl handler provided by the
1026 * driver. If the driver doesn't support these
1027 * for a specific output, it must override these flags.
1028 */
73f35418 1029 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
59076122 1030 p->capabilities |= V4L2_OUT_CAP_STD;
59076122
HV		 1031
1032 return ops->vidioc_enum_output(file, fh, p);
1033}
1034
be6c64e4
HV		 1035static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1036 struct file *file, void *fh, void *arg)
1037{
1038 struct v4l2_fmtdesc *p = arg;
4b20259f
HV		 1039 struct video_device *vfd = video_devdata(file);
1040 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1041 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1042
1043 switch (p->type) {
1044 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1045 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
be6c64e4
HV		 1046 break;
1047 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1048 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1049 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
be6c64e4
HV		 1050 break;
1051 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1052 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1053 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
be6c64e4
HV		 1054 break;
1055 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1056 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1057 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
be6c64e4
HV		 1058 break;
1059 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1060 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1061 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
be6c64e4
HV		 1062 break;
1063 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
be6c64e4
HV		 1064 }
1065 return -EINVAL;
1066}
1067
1068static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1069 struct file *file, void *fh, void *arg)
1070{
1071 struct v4l2_format *p = arg;
4b20259f
HV		 1072 struct video_device *vfd = video_devdata(file);
1073 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1074 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1075 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1076
1077 switch (p->type) {
1078 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1079 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
be6c64e4
HV		 1080 break;
1081 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1082 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1083 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
be6c64e4
HV		 1084 break;
1085 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1086 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1087 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
be6c64e4
HV		 1088 break;
1089 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
4b20259f
HV		 1090 case V4L2_BUF_TYPE_VBI_CAPTURE:
1091 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1092 break;
1093 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1094 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1095 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1096 break;
1097 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
be6c64e4 1098 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1099 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
be6c64e4
HV		 1100 break;
1101 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1102 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1103 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
be6c64e4
HV		 1104 break;
1105 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1106 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 1107 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
be6c64e4
HV		 1108 break;
1109 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
be6c64e4 1110 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 1111 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
be6c64e4
HV		 1112 break;
1113 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
be6c64e4 1114 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 1115 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
be6c64e4
HV		 1116 break;
1117 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
be6c64e4
HV		 1118 }
1119 return -EINVAL;
1120}
1121
1122static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1123 struct file *file, void *fh, void *arg)
1124{
1125 struct v4l2_format *p = arg;
4b20259f
HV		 1126 struct video_device *vfd = video_devdata(file);
1127 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1128 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1129 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1130
1131 switch (p->type) {
1132 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1133 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
be6c64e4
HV		 1134 break;
1135 CLEAR_AFTER_FIELD(p, fmt.pix);
1136 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1137 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1138 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
be6c64e4
HV		 1139 break;
1140 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1141 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1142 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1143 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
be6c64e4
HV		 1144 break;
1145 CLEAR_AFTER_FIELD(p, fmt.win);
1146 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
4b20259f
HV		 1147 case V4L2_BUF_TYPE_VBI_CAPTURE:
1148 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1149 break;
1150 CLEAR_AFTER_FIELD(p, fmt.vbi);
1151 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1152 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1153 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1154 break;
1155 CLEAR_AFTER_FIELD(p, fmt.sliced);
1156 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
be6c64e4 1157 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1158 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
be6c64e4
HV		 1159 break;
1160 CLEAR_AFTER_FIELD(p, fmt.pix);
1161 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1162 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1163 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
be6c64e4
HV		 1164 break;
1165 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1166 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1167 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 1168 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
be6c64e4
HV		 1169 break;
1170 CLEAR_AFTER_FIELD(p, fmt.win);
1171 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
be6c64e4 1172 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 1173 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
be6c64e4
HV		 1174 break;
1175 CLEAR_AFTER_FIELD(p, fmt.vbi);
1176 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
be6c64e4 1177 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 1178 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
be6c64e4
HV		 1179 break;
1180 CLEAR_AFTER_FIELD(p, fmt.sliced);
1181 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
be6c64e4
HV		 1182 }
1183 return -EINVAL;
1184}
1185
1186static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1187 struct file *file, void *fh, void *arg)
1188{
1189 struct v4l2_format *p = arg;
4b20259f
HV		 1190 struct video_device *vfd = video_devdata(file);
1191 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1192 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1193 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
be6c64e4
HV		 1194
1195 switch (p->type) {
1196 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
4b20259f 1197 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
be6c64e4
HV		 1198 break;
1199 CLEAR_AFTER_FIELD(p, fmt.pix);
1200 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1201 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
4b20259f 1202 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
be6c64e4
HV		 1203 break;
1204 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1205 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1206 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
4b20259f 1207 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
be6c64e4
HV		 1208 break;
1209 CLEAR_AFTER_FIELD(p, fmt.win);
1210 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
4b20259f
HV		 1211 case V4L2_BUF_TYPE_VBI_CAPTURE:
1212 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1213 break;
1214 CLEAR_AFTER_FIELD(p, fmt.vbi);
1215 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1216 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1217 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1218 break;
1219 CLEAR_AFTER_FIELD(p, fmt.sliced);
1220 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
be6c64e4 1221 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
4b20259f 1222 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
be6c64e4
HV		 1223 break;
1224 CLEAR_AFTER_FIELD(p, fmt.pix);
1225 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1226 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
4b20259f 1227 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
be6c64e4
HV		 1228 break;
1229 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1230 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1231 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
4b20259f 1232 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
be6c64e4
HV		 1233 break;
1234 CLEAR_AFTER_FIELD(p, fmt.win);
1235 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
be6c64e4 1236 case V4L2_BUF_TYPE_VBI_OUTPUT:
4b20259f 1237 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
be6c64e4
HV		 1238 break;
1239 CLEAR_AFTER_FIELD(p, fmt.vbi);
1240 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
be6c64e4 1241 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
4b20259f 1242 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
be6c64e4
HV		 1243 break;
1244 CLEAR_AFTER_FIELD(p, fmt.sliced);
1245 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
be6c64e4
HV		 1246 }
1247 return -EINVAL;
1248}
1249
e325b244
HV		 1250static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1251 struct file *file, void *fh, void *arg)
1252{
1253 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1254}
1255
1256static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1257 struct file *file, void *fh, void *arg)
1258{
1259 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1260}
1261
4b1e2e4d
HV		 1262static int v4l_g_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;
82b655bf 1267 int err;
4b1e2e4d
HV		 1268
1269 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1270 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
82b655bf
HV		 1271 err = ops->vidioc_g_tuner(file, fh, p);
1272 if (!err)
1273 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1274 return err;
4b1e2e4d
HV		 1275}
1276
1277static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1278 struct file *file, void *fh, void *arg)
1279{
1280 struct video_device *vfd = video_devdata(file);
1281 struct v4l2_tuner *p = arg;
1282
1283 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1284 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1285 return ops->vidioc_s_tuner(file, fh, p);
1286}
1287
82b655bf
HV		 1288static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1289 struct file *file, void *fh, void *arg)
1290{
1291 struct v4l2_modulator *p = arg;
1292 int err;
1293
1294 err = ops->vidioc_g_modulator(file, fh, p);
1295 if (!err)
1296 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1297 return err;
1298}
1299
4b1e2e4d
HV		 1300static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1301 struct file *file, void *fh, void *arg)
1302{
1303 struct video_device *vfd = video_devdata(file);
1304 struct v4l2_frequency *p = arg;
1305
1306 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1307 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1308 return ops->vidioc_g_frequency(file, fh, p);
1309}
1310
1311static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1312 struct file *file, void *fh, void *arg)
1313{
1314 struct video_device *vfd = video_devdata(file);
b530a447 1315 const struct v4l2_frequency *p = arg;
4b1e2e4d
HV		 1316 enum v4l2_tuner_type type;
1317
1318 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1319 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1320 if (p->type != type)
1321 return -EINVAL;
1322 return ops->vidioc_s_frequency(file, fh, p);
1323}
1324
1325static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1326 struct file *file, void *fh, void *arg)
1327{
1328 struct video_device *vfd = video_devdata(file);
1329 struct v4l2_standard *p = arg;
1330 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1331 unsigned int index = p->index, i, j = 0;
1332 const char *descr = "";
1333
a5338190
HV		 1334 /* Return -ENODATA if the tvnorms for the current input
1335 or output is 0, meaning that it doesn't support this API. */
1336 if (id == 0)
1337 return -ENODATA;
1338
4b1e2e4d
HV		 1339 /* Return norm array in a canonical way */
1340 for (i = 0; i <= index && id; i++) {
1341 /* last std value in the standards array is 0, so this
1342 while always ends there since (id & 0) == 0. */
1343 while ((id & standards[j].std) != standards[j].std)
1344 j++;
1345 curr_id = standards[j].std;
1346 descr = standards[j].descr;
1347 j++;
1348 if (curr_id == 0)
1349 break;
1350 if (curr_id != V4L2_STD_PAL &&
1351 curr_id != V4L2_STD_SECAM &&
1352 curr_id != V4L2_STD_NTSC)
1353 id &= ~curr_id;
1354 }
1355 if (i <= index)
1356 return -EINVAL;
1357
1358 v4l2_video_std_construct(p, curr_id, descr);
1359 return 0;
1360}
1361
1362static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1363 struct file *file, void *fh, void *arg)
1364{
1365 struct video_device *vfd = video_devdata(file);
1366 v4l2_std_id *id = arg;
1367
1368 /* Calls the specific handler */
1369 if (ops->vidioc_g_std)
1370 return ops->vidioc_g_std(file, fh, arg);
1371 if (vfd->current_norm) {
1372 *id = vfd->current_norm;
1373 return 0;
1374 }
1375 return -ENOTTY;
1376}
1377
1378static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1379 struct file *file, void *fh, void *arg)
1380{
1381 struct video_device *vfd = video_devdata(file);
314527ac 1382 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
4b1e2e4d
HV		 1383 int ret;
1384
314527ac 1385 norm = id & vfd->tvnorms;
4b1e2e4d
HV		 1386 if (vfd->tvnorms && !norm) /* Check if std is supported */
1387 return -EINVAL;
1388
1389 /* Calls the specific handler */
314527ac 1390 ret = ops->vidioc_s_std(file, fh, norm);
4b1e2e4d
HV		 1391
1392 /* Updates standard information */
1393 if (ret >= 0)
1394 vfd->current_norm = norm;
1395 return ret;
1396}
1397
1398static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1399 struct file *file, void *fh, void *arg)
1400{
1401 struct video_device *vfd = video_devdata(file);
1402 v4l2_std_id *p = arg;
1403
1404 /*
1405 * If nothing detected, it should return all supported
1406 * standard.
1407 * Drivers just need to mask the std argument, in order
1408 * to remove the standards that don't apply from the mask.
1409 * This means that tuners, audio and video decoders can join
1410 * their efforts to improve the standards detection.
1411 */
1412 *p = vfd->tvnorms;
1413 return ops->vidioc_querystd(file, fh, arg);
1414}
1415
1416static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1417 struct file *file, void *fh, void *arg)
1418{
1419 struct video_device *vfd = video_devdata(file);
1420 struct v4l2_hw_freq_seek *p = arg;
1421 enum v4l2_tuner_type type;
1422
1423 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1424 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1425 if (p->type != type)
1426 return -EINVAL;
1427 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1428}
1429
737c097b
HV		 1430static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1431 struct file *file, void *fh, void *arg)
1432{
1433 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1434}
1435
eb3728ed
HV		 1436static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1437 struct file *file, void *fh, void *arg)
1438{
1439 struct v4l2_requestbuffers *p = arg;
4b20259f 1440 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1441
1442 if (ret)
1443 return ret;
1444
633c98e5 1445 CLEAR_AFTER_FIELD(p, memory);
eb3728ed
HV		 1446
1447 return ops->vidioc_reqbufs(file, fh, p);
1448}
1449
1450static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1451 struct file *file, void *fh, void *arg)
1452{
1453 struct v4l2_buffer *p = arg;
4b20259f 1454 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1455
1456 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1457}
1458
1459static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1460 struct file *file, void *fh, void *arg)
1461{
1462 struct v4l2_buffer *p = arg;
4b20259f 1463 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1464
1465 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1466}
1467
1468static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1469 struct file *file, void *fh, void *arg)
1470{
1471 struct v4l2_buffer *p = arg;
4b20259f 1472 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1473
1474 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1475}
1476
1477static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1478 struct file *file, void *fh, void *arg)
1479{
1480 struct v4l2_create_buffers *create = arg;
4b20259f 1481 int ret = check_fmt(file, create->format.type);
eb3728ed
HV		 1482
1483 return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1484}
1485
1486static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1487 struct file *file, void *fh, void *arg)
1488{
1489 struct v4l2_buffer *b = arg;
4b20259f 1490 int ret = check_fmt(file, b->type);
eb3728ed
HV		 1491
1492 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1493}
1494
1495static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1496 struct file *file, void *fh, void *arg)
1497{
1498 struct video_device *vfd = video_devdata(file);
1499 struct v4l2_streamparm *p = arg;
1500 v4l2_std_id std;
4b20259f 1501 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1502
1503 if (ret)
1504 return ret;
1505 if (ops->vidioc_g_parm)
1506 return ops->vidioc_g_parm(file, fh, p);
1507 std = vfd->current_norm;
1508 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1509 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1510 return -EINVAL;
1511 p->parm.capture.readbuffers = 2;
73f35418 1512 if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std)
eb3728ed
HV		 1513 ret = ops->vidioc_g_std(file, fh, &std);
1514 if (ret == 0)
1515 v4l2_video_std_frame_period(std,
1516 &p->parm.capture.timeperframe);
1517 return ret;
1518}
1519
1520static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1521 struct file *file, void *fh, void *arg)
1522{
1523 struct v4l2_streamparm *p = arg;
4b20259f 1524 int ret = check_fmt(file, p->type);
eb3728ed
HV		 1525
1526 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1527}
1528
efbceecd
HV		 1529static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1530 struct file *file, void *fh, void *arg)
1531{
1532 struct video_device *vfd = video_devdata(file);
1533 struct v4l2_queryctrl *p = arg;
7a3ed2d9
HV		 1534 struct v4l2_fh *vfh =
1535 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1536
1537 if (vfh && vfh->ctrl_handler)
1538 return v4l2_queryctrl(vfh->ctrl_handler, p);
1539 if (vfd->ctrl_handler)
1540 return v4l2_queryctrl(vfd->ctrl_handler, p);
1541 if (ops->vidioc_queryctrl)
1542 return ops->vidioc_queryctrl(file, fh, p);
1543 return -ENOTTY;
1544}
1545
1546static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1547 struct file *file, void *fh, void *arg)
1548{
1549 struct video_device *vfd = video_devdata(file);
1550 struct v4l2_querymenu *p = arg;
7a3ed2d9
HV		 1551 struct v4l2_fh *vfh =
1552 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1553
1554 if (vfh && vfh->ctrl_handler)
1555 return v4l2_querymenu(vfh->ctrl_handler, p);
1556 if (vfd->ctrl_handler)
1557 return v4l2_querymenu(vfd->ctrl_handler, p);
1558 if (ops->vidioc_querymenu)
1559 return ops->vidioc_querymenu(file, fh, p);
1560 return -ENOTTY;
1561}
1562
1563static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1564 struct file *file, void *fh, void *arg)
1565{
1566 struct video_device *vfd = video_devdata(file);
1567 struct v4l2_control *p = arg;
7a3ed2d9
HV		 1568 struct v4l2_fh *vfh =
1569 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1570 struct v4l2_ext_controls ctrls;
1571 struct v4l2_ext_control ctrl;
1572
1573 if (vfh && vfh->ctrl_handler)
1574 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1575 if (vfd->ctrl_handler)
1576 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1577 if (ops->vidioc_g_ctrl)
1578 return ops->vidioc_g_ctrl(file, fh, p);
1579 if (ops->vidioc_g_ext_ctrls == NULL)
1580 return -ENOTTY;
1581
1582 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1583 ctrls.count = 1;
1584 ctrls.controls = &ctrl;
1585 ctrl.id = p->id;
1586 ctrl.value = p->value;
1587 if (check_ext_ctrls(&ctrls, 1)) {
1588 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1589
1590 if (ret == 0)
1591 p->value = ctrl.value;
1592 return ret;
1593 }
1594 return -EINVAL;
1595}
1596
1597static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1598 struct file *file, void *fh, void *arg)
1599{
1600 struct video_device *vfd = video_devdata(file);
1601 struct v4l2_control *p = arg;
7a3ed2d9
HV		 1602 struct v4l2_fh *vfh =
1603 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1604 struct v4l2_ext_controls ctrls;
1605 struct v4l2_ext_control ctrl;
1606
1607 if (vfh && vfh->ctrl_handler)
1608 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1609 if (vfd->ctrl_handler)
1610 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1611 if (ops->vidioc_s_ctrl)
1612 return ops->vidioc_s_ctrl(file, fh, p);
1613 if (ops->vidioc_s_ext_ctrls == NULL)
1614 return -ENOTTY;
1615
1616 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1617 ctrls.count = 1;
1618 ctrls.controls = &ctrl;
1619 ctrl.id = p->id;
1620 ctrl.value = p->value;
1621 if (check_ext_ctrls(&ctrls, 1))
1622 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1623 return -EINVAL;
1624}
1625
1626static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1627 struct file *file, void *fh, void *arg)
1628{
1629 struct video_device *vfd = video_devdata(file);
1630 struct v4l2_ext_controls *p = arg;
7a3ed2d9
HV		 1631 struct v4l2_fh *vfh =
1632 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1633
1634 p->error_idx = p->count;
1635 if (vfh && vfh->ctrl_handler)
1636 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1637 if (vfd->ctrl_handler)
1638 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1639 if (ops->vidioc_g_ext_ctrls == NULL)
1640 return -ENOTTY;
1641 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1642 -EINVAL;
1643}
1644
1645static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1646 struct file *file, void *fh, void *arg)
1647{
1648 struct video_device *vfd = video_devdata(file);
1649 struct v4l2_ext_controls *p = arg;
7a3ed2d9
HV		 1650 struct v4l2_fh *vfh =
1651 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1652
1653 p->error_idx = p->count;
1654 if (vfh && vfh->ctrl_handler)
1655 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1656 if (vfd->ctrl_handler)
1657 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1658 if (ops->vidioc_s_ext_ctrls == NULL)
1659 return -ENOTTY;
1660 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1661 -EINVAL;
1662}
1663
1664static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1665 struct file *file, void *fh, void *arg)
1666{
1667 struct video_device *vfd = video_devdata(file);
1668 struct v4l2_ext_controls *p = arg;
7a3ed2d9
HV		 1669 struct v4l2_fh *vfh =
1670 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
efbceecd
HV		 1671
1672 p->error_idx = p->count;
1673 if (vfh && vfh->ctrl_handler)
1674 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1675 if (vfd->ctrl_handler)
1676 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1677 if (ops->vidioc_try_ext_ctrls == NULL)
1678 return -ENOTTY;
1679 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1680 -EINVAL;
1681}
1682
d84f2d94
HV		 1683static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1684 struct file *file, void *fh, void *arg)
1685{
1686 struct v4l2_crop *p = arg;
1687 struct v4l2_selection s = {
1688 .type = p->type,
1689 };
1690 int ret;
1691
1692 if (ops->vidioc_g_crop)
1693 return ops->vidioc_g_crop(file, fh, p);
1694 /* simulate capture crop using selection api */
1695
1696 /* crop means compose for output devices */
1697 if (V4L2_TYPE_IS_OUTPUT(p->type))
1698 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1699 else
1700 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1701
1702 ret = ops->vidioc_g_selection(file, fh, &s);
1703
1704 /* copying results to old structure on success */
1705 if (!ret)
1706 p->c = s.r;
1707 return ret;
1708}
1709
1710static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1711 struct file *file, void *fh, void *arg)
1712{
1713 struct v4l2_crop *p = arg;
1714 struct v4l2_selection s = {
1715 .type = p->type,
1716 .r = p->c,
1717 };
1718
1719 if (ops->vidioc_s_crop)
1720 return ops->vidioc_s_crop(file, fh, p);
1721 /* simulate capture crop using selection api */
1722
1723 /* crop means compose for output devices */
1724 if (V4L2_TYPE_IS_OUTPUT(p->type))
1725 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1726 else
1727 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1728
1729 return ops->vidioc_s_selection(file, fh, &s);
1730}
1731
1732static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1733 struct file *file, void *fh, void *arg)
1734{
1735 struct v4l2_cropcap *p = arg;
1736 struct v4l2_selection s = { .type = p->type };
1737 int ret;
1738
1739 if (ops->vidioc_cropcap)
1740 return ops->vidioc_cropcap(file, fh, p);
1741
1742 /* obtaining bounds */
1743 if (V4L2_TYPE_IS_OUTPUT(p->type))
1744 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1745 else
1746 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1747
1748 ret = ops->vidioc_g_selection(file, fh, &s);
1749 if (ret)
1750 return ret;
1751 p->bounds = s.r;
1752
1753 /* obtaining defrect */
1754 if (V4L2_TYPE_IS_OUTPUT(p->type))
1755 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1756 else
1757 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1758
1759 ret = ops->vidioc_g_selection(file, fh, &s);
1760 if (ret)
1761 return ret;
1762 p->defrect = s.r;
1763
1764 /* setting trivial pixelaspect */
1765 p->pixelaspect.numerator = 1;
1766 p->pixelaspect.denominator = 1;
1767 return 0;
1768}
1769
f16f77b0
HV		 1770static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1771 struct file *file, void *fh, void *arg)
1772{
1773 struct video_device *vfd = video_devdata(file);
1774 int ret;
1775
1776 if (vfd->v4l2_dev)
1777 pr_info("%s: ================= START STATUS =================\n",
1778 vfd->v4l2_dev->name);
1779 ret = ops->vidioc_log_status(file, fh);
1780 if (vfd->v4l2_dev)
1781 pr_info("%s: ================== END STATUS ==================\n",
1782 vfd->v4l2_dev->name);
1783 return ret;
1784}
1785
1786static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1787 struct file *file, void *fh, void *arg)
1788{
1789#ifdef CONFIG_VIDEO_ADV_DEBUG
1790 struct v4l2_dbg_register *p = arg;
79b0c640
HV		 1791 struct video_device *vfd = video_devdata(file);
1792 struct v4l2_subdev *sd;
1793 int idx = 0;
f16f77b0
HV		 1794
1795 if (!capable(CAP_SYS_ADMIN))
1796 return -EPERM;
3eef2510 1797 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
79b0c640
HV		 1798 if (vfd->v4l2_dev == NULL)
1799 return -EINVAL;
3eef2510
HV		 1800 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1801 if (p->match.addr == idx++)
79b0c640 1802 return v4l2_subdev_call(sd, core, g_register, p);
79b0c640
HV		 1803 return -EINVAL;
1804 }
1805 if (ops->vidioc_g_register)
1806 return ops->vidioc_g_register(file, fh, p);
1807 return -EINVAL;
f16f77b0
HV		 1808#else
1809 return -ENOTTY;
1810#endif
1811}
1812
1813static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1814 struct file *file, void *fh, void *arg)
1815{
1816#ifdef CONFIG_VIDEO_ADV_DEBUG
977ba3b1 1817 const struct v4l2_dbg_register *p = arg;
79b0c640
HV		 1818 struct video_device *vfd = video_devdata(file);
1819 struct v4l2_subdev *sd;
1820 int idx = 0;
f16f77b0
HV		 1821
1822 if (!capable(CAP_SYS_ADMIN))
1823 return -EPERM;
3eef2510 1824 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
79b0c640
HV		 1825 if (vfd->v4l2_dev == NULL)
1826 return -EINVAL;
3eef2510
HV		 1827 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1828 if (p->match.addr == idx++)
79b0c640 1829 return v4l2_subdev_call(sd, core, s_register, p);
79b0c640
HV		 1830 return -EINVAL;
1831 }
1832 if (ops->vidioc_s_register)
1833 return ops->vidioc_s_register(file, fh, p);
1834 return -EINVAL;
f16f77b0
HV		 1835#else
1836 return -ENOTTY;
1837#endif
1838}
1839
1840static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1841 struct file *file, void *fh, void *arg)
1842{
1843 struct v4l2_dbg_chip_ident *p = arg;
1844
1845 p->ident = V4L2_IDENT_NONE;
1846 p->revision = 0;
3eef2510 1847 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV)
79b0c640 1848 return -EINVAL;
f16f77b0
HV		 1849 return ops->vidioc_g_chip_ident(file, fh, p);
1850}
1851
96b03d2a 1852static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
79b0c640
HV		 1853 struct file *file, void *fh, void *arg)
1854{
cd634f1b 1855#ifdef CONFIG_VIDEO_ADV_DEBUG
79b0c640 1856 struct video_device *vfd = video_devdata(file);
96b03d2a 1857 struct v4l2_dbg_chip_info *p = arg;
79b0c640
HV		 1858 struct v4l2_subdev *sd;
1859 int idx = 0;
1860
1861 switch (p->match.type) {
1862 case V4L2_CHIP_MATCH_BRIDGE:
79b0c640
HV		 1863 if (ops->vidioc_s_register)
1864 p->flags |= V4L2_CHIP_FL_WRITABLE;
1865 if (ops->vidioc_g_register)
1866 p->flags |= V4L2_CHIP_FL_READABLE;
79b0c640
HV		 1867 if (vfd->v4l2_dev)
1868 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1869 else if (vfd->parent)
1870 strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name));
1871 else
1872 strlcpy(p->name, "bridge", sizeof(p->name));
96b03d2a
HV		 1873 if (ops->vidioc_g_chip_info)
1874 return ops->vidioc_g_chip_info(file, fh, arg);
0f0fe4b9
HV		 1875 if (p->match.addr)
1876 return -EINVAL;
79b0c640
HV		 1877 return 0;
1878
3eef2510 1879 case V4L2_CHIP_MATCH_SUBDEV:
79b0c640
HV		 1880 if (vfd->v4l2_dev == NULL)
1881 break;
1882 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
3eef2510
HV		 1883 if (p->match.addr != idx++)
1884 continue;
1885 if (sd->ops->core && sd->ops->core->s_register)
1886 p->flags |= V4L2_CHIP_FL_WRITABLE;
1887 if (sd->ops->core && sd->ops->core->g_register)
1888 p->flags |= V4L2_CHIP_FL_READABLE;
1889 strlcpy(p->name, sd->name, sizeof(p->name));
1890 return 0;
79b0c640
HV		 1891 }
1892 break;
1893 }
1894 return -EINVAL;
cd634f1b
HV		 1895#else
1896 return -ENOTTY;
1897#endif
79b0c640
HV		 1898}
1899
458aa4a6
HV		 1900static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1901 struct file *file, void *fh, void *arg)
1902{
1903 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1904}
1905
1906static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1907 struct file *file, void *fh, void *arg)
1908{
1909 return ops->vidioc_subscribe_event(fh, arg);
1910}
1911
1912static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1913 struct file *file, void *fh, void *arg)
1914{
1915 return ops->vidioc_unsubscribe_event(fh, arg);
1916}
1917
1918static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1919 struct file *file, void *fh, void *arg)
1920{
1921 struct v4l2_sliced_vbi_cap *p = arg;
4b20259f
HV		 1922 int ret = check_fmt(file, p->type);
1923
1924 if (ret)
1925 return ret;
458aa4a6
HV		 1926
1927 /* Clear up to type, everything after type is zeroed already */
1928 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1929
1930 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1931}
1932
82b655bf
HV		 1933static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1934 struct file *file, void *fh, void *arg)
1935{
1936 struct video_device *vfd = video_devdata(file);
1937 struct v4l2_frequency_band *p = arg;
1938 enum v4l2_tuner_type type;
1939 int err;
1940
1941 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1942 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1943
1944 if (type != p->type)
1945 return -EINVAL;
1946 if (ops->vidioc_enum_freq_bands)
1947 return ops->vidioc_enum_freq_bands(file, fh, p);
73f35418 1948 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
82b655bf
HV		 1949 struct v4l2_tuner t = {
1950 .index = p->tuner,
1951 .type = type,
1952 };
1953
aa4d9b53
HV		 1954 if (p->index)
1955 return -EINVAL;
82b655bf
HV		 1956 err = ops->vidioc_g_tuner(file, fh, &t);
1957 if (err)
1958 return err;
1959 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1960 p->rangelow = t.rangelow;
1961 p->rangehigh = t.rangehigh;
1962 p->modulation = (type == V4L2_TUNER_RADIO) ?
1963 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1964 return 0;
1965 }
73f35418 1966 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
82b655bf
HV		 1967 struct v4l2_modulator m = {
1968 .index = p->tuner,
1969 };
1970
1971 if (type != V4L2_TUNER_RADIO)
1972 return -EINVAL;
aa4d9b53
HV		 1973 if (p->index)
1974 return -EINVAL;
82b655bf
HV		 1975 err = ops->vidioc_g_modulator(file, fh, &m);
1976 if (err)
1977 return err;
1978 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1979 p->rangelow = m.rangelow;
1980 p->rangehigh = m.rangehigh;
1981 p->modulation = (type == V4L2_TUNER_RADIO) ?
1982 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1983 return 0;
1984 }
1985 return -ENOTTY;
1986}
1987
4839e6c2
HV		 1988struct v4l2_ioctl_info {
1989 unsigned int ioctl;
27cd2aba 1990 u32 flags;
4839e6c2 1991 const char * const name;
86748f35
HV		 1992 union {
1993 u32 offset;
1994 int (*func)(const struct v4l2_ioctl_ops *ops,
1995 struct file *file, void *fh, void *p);
26ddcbcc 1996 } u;
86748f35 1997 void (*debug)(const void *arg, bool write_only);
4839e6c2
HV		 1998};
1999
2000/* This control needs a priority check */
2001#define INFO_FL_PRIO (1 << 0)
2002/* This control can be valid if the filehandle passes a control handler. */
2003#define INFO_FL_CTRL (1 << 1)
86748f35
HV		 2004/* This is a standard ioctl, no need for special code */
2005#define INFO_FL_STD (1 << 2)
2006/* This is ioctl has its own function */
2007#define INFO_FL_FUNC (1 << 3)
5a5adf6b
HV		 2008/* Queuing ioctl */
2009#define INFO_FL_QUEUE (1 << 4)
27cd2aba
HV		 2010/* Zero struct from after the field to the end */
2011#define INFO_FL_CLEAR(v4l2_struct, field) \
2012 ((offsetof(struct v4l2_struct, field) + \
2013 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2014#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
4839e6c2 2015
86748f35
HV		 2016#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
2017 [_IOC_NR(_ioctl)] = { \
2018 .ioctl = _ioctl, \
2019 .flags = _flags | INFO_FL_STD, \
2020 .name = #_ioctl, \
26ddcbcc 2021 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
86748f35
HV		 2022 .debug = _debug, \
2023 }
2024
2025#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
2026 [_IOC_NR(_ioctl)] = { \
2027 .ioctl = _ioctl, \
2028 .flags = _flags | INFO_FL_FUNC, \
2029 .name = #_ioctl, \
26ddcbcc 2030 .u.func = _func, \
86748f35
HV		 2031 .debug = _debug, \
2032 }
2033
4839e6c2 2034static struct v4l2_ioctl_info v4l2_ioctls[] = {
59076122 2035 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
be6c64e4
HV		 2036 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2037 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2038 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
5a5adf6b
HV		 2039 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2040 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
be6c64e4
HV		 2041 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2042 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
737c097b 2043 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
5a5adf6b 2044 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
b799d09a 2045 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
5a5adf6b
HV		 2046 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2047 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2048 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
eb3728ed
HV		 2049 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2050 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
4b1e2e4d
HV		 2051 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
2052 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2053 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
59076122 2054 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
efbceecd
HV		 2055 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2056 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
4b1e2e4d
HV		 2057 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2058 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
59076122
HV		 2059 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2060 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
efbceecd
HV		 2061 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2062 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
59076122
HV		 2063 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2064 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2065 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2066 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2067 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2068 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2069 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
82b655bf 2070 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
4b1e2e4d
HV		 2071 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2072 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2073 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
d84f2d94
HV		 2074 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2075 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2076 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2077 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2078 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
d806f2df
HV		 2079 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2080 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
4b1e2e4d 2081 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
be6c64e4 2082 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
59076122
HV		 2083 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2084 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
d0547cba
HV		 2085 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2086 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
458aa4a6 2087 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 2088 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
efbceecd
HV		 2089 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2090 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
9bc31633 2091 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
458aa4a6
HV		 2092 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2093 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
d806f2df
HV		 2094 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2095 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2096 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2097 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2098 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
f16f77b0
HV		 2099 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2100 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2101 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
4b1e2e4d 2102 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
efc626b0
HV		 2103 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2104 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
458aa4a6
HV		 2105 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2106 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2107 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
5a5adf6b
HV		 2108 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2109 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
efc626b0
HV		 2110 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2111 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
a1acb8f9 2112 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 2113 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
96b03d2a 2114 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		 2115};
2116#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2117
2118bool v4l2_is_known_ioctl(unsigned int cmd)
2119{
2120 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2121 return false;
2122 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2123}
2124
5a5adf6b
HV		 2125struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2126{
2127 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2128 return vdev->lock;
2129 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2130 return NULL;
2131 if (vdev->queue && vdev->queue->lock &&
2132 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2133 return vdev->queue->lock;
2134 return vdev->lock;
2135}
2136
4839e6c2
HV		 2137/* Common ioctl debug function. This function can be used by
2138 external ioctl messages as well as internal V4L ioctl */
4a085168 2139void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
4839e6c2 2140{
86748f35 2141 const char *dir, *type;
4839e6c2 2142
4a085168
HV		 2143 if (prefix)
2144 printk(KERN_DEBUG "%s: ", prefix);
2145
4839e6c2
HV		 2146 switch (_IOC_TYPE(cmd)) {
2147 case 'd':
2148 type = "v4l2_int";
2149 break;
2150 case 'V':
2151 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2152 type = "v4l2";
2153 break;
2154 }
86748f35 2155 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
4839e6c2
HV		 2156 return;
2157 default:
2158 type = "unknown";
86748f35 2159 break;
4839e6c2
HV		 2160 }
2161
2162 switch (_IOC_DIR(cmd)) {
2163 case _IOC_NONE: dir = "--"; break;
2164 case _IOC_READ: dir = "r-"; break;
2165 case _IOC_WRITE: dir = "-w"; break;
2166 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2167 default: dir = "*ERR*"; break;
2168 }
86748f35 2169 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
4839e6c2
HV		 2170 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2171}
2172EXPORT_SYMBOL(v4l_printk_ioctl);
2173
069b7479 2174static long __video_do_ioctl(struct file *file,
35ea11ff
HV		 2175 unsigned int cmd, void *arg)
2176{
2177 struct video_device *vfd = video_devdata(file);
a399810c 2178 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
86748f35
HV		 2179 bool write_only = false;
2180 struct v4l2_ioctl_info default_info;
2181 const struct v4l2_ioctl_info *info;
d5fbf32f 2182 void *fh = file->private_data;
99cd47bc 2183 struct v4l2_fh *vfh = NULL;
b1a873a3 2184 int use_fh_prio = 0;
80131fe0 2185 int debug = vfd->debug;
9190d191 2186 long ret = -ENOTTY;
35ea11ff 2187
6a717883 2188 if (ops == NULL) {
4a085168
HV		 2189 pr_warn("%s: has no ioctl_ops.\n",
2190 video_device_node_name(vfd));
9190d191 2191 return ret;
6a717883
HV		 2192 }
2193
b1a873a3 2194 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
99cd47bc 2195 vfh = file->private_data;
b1a873a3
HV		 2196 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2197 }
99cd47bc 2198
48ea0be0 2199 if (v4l2_is_known_ioctl(cmd)) {
86748f35 2200 info = &v4l2_ioctls[_IOC_NR(cmd)];
48ea0be0
HV		 2201
2202 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2203 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
86748f35 2204 goto done;
4b902fec
HV		 2205
2206 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2207 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2208 if (ret)
86748f35 2209 goto done;
4b902fec 2210 }
86748f35
HV		 2211 } else {
2212 default_info.ioctl = cmd;
2213 default_info.flags = 0;
f18d8e07 2214 default_info.debug = v4l_print_default;
86748f35 2215 info = &default_info;
48ea0be0
HV		 2216 }
2217
86748f35 2218 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
86748f35
HV		 2219 if (info->flags & INFO_FL_STD) {
2220 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2221 const void *p = vfd->ioctl_ops;
26ddcbcc 2222 const vidioc_op *vidioc = p + info->u.offset;
86748f35
HV		 2223
2224 ret = (*vidioc)(file, fh, arg);
86748f35 2225 } else if (info->flags & INFO_FL_FUNC) {
26ddcbcc 2226 ret = info->u.func(ops, file, fh, arg);
f18d8e07
HV		 2227 } else if (!ops->vidioc_default) {
2228 ret = -ENOTTY;
2229 } else {
2230 ret = ops->vidioc_default(file, fh,
2231 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2232 cmd, arg);
48ea0be0 2233 }
99cd47bc 2234
86748f35 2235done:
80131fe0 2236 if (debug) {
4a085168 2237 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
86748f35 2238 if (ret < 0)
505d04bd
HV		 2239 pr_cont(": error %ld", ret);
2240 if (debug == V4L2_DEBUG_IOCTL)
86748f35 2241 pr_cont("\n");
86748f35
HV		 2242 else if (_IOC_DIR(cmd) == _IOC_NONE)
2243 info->debug(arg, write_only);
2244 else {
2245 pr_cont(": ");
2246 info->debug(arg, write_only);
35ea11ff
HV		 2247 }
2248 }
2249
2250 return ret;
2251}
2252
d14e6d76
PO		 2253static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2254 void * __user *user_ptr, void ***kernel_ptr)
2255{
2256 int ret = 0;
2257
2258 switch (cmd) {
96b1a702 2259 case VIDIOC_PREPARE_BUF:
d14e6d76
PO		 2260 case VIDIOC_QUERYBUF:
2261 case VIDIOC_QBUF:
2262 case VIDIOC_DQBUF: {
2263 struct v4l2_buffer *buf = parg;
2264
2265 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2266 if (buf->length > VIDEO_MAX_PLANES) {
2267 ret = -EINVAL;
2268 break;
2269 }
2270 *user_ptr = (void __user *)buf->m.planes;
2ef40370 2271 *kernel_ptr = (void *)&buf->m.planes;
d14e6d76
PO		 2272 *array_size = sizeof(struct v4l2_plane) * buf->length;
2273 ret = 1;
2274 }
2275 break;
2276 }
2277
ed45ce2c
HV		 2278 case VIDIOC_SUBDEV_G_EDID:
2279 case VIDIOC_SUBDEV_S_EDID: {
2280 struct v4l2_subdev_edid *edid = parg;
2281
2282 if (edid->blocks) {
1b8b10cc
HV		 2283 if (edid->blocks > 256) {
2284 ret = -EINVAL;
2285 break;
2286 }
ed45ce2c
HV		 2287 *user_ptr = (void __user *)edid->edid;
2288 *kernel_ptr = (void *)&edid->edid;
2289 *array_size = edid->blocks * 128;
2290 ret = 1;
2291 }
2292 break;
2293 }
2294
d14e6d76
PO		 2295 case VIDIOC_S_EXT_CTRLS:
2296 case VIDIOC_G_EXT_CTRLS:
2297 case VIDIOC_TRY_EXT_CTRLS: {
2298 struct v4l2_ext_controls *ctrls = parg;
2299
2300 if (ctrls->count != 0) {
6c06108b
DC		 2301 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2302 ret = -EINVAL;
2303 break;
2304 }
d14e6d76 2305 *user_ptr = (void __user *)ctrls->controls;
2ef40370 2306 *kernel_ptr = (void *)&ctrls->controls;
d14e6d76
PO		 2307 *array_size = sizeof(struct v4l2_ext_control)
2308 * ctrls->count;
2309 ret = 1;
2310 }
2311 break;
2312 }
2313 }
2314
2315 return ret;
2316}
2317
fc0a8079
LP		 2318long
2319video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2320 v4l2_kioctl func)
35ea11ff
HV		 2321{
2322 char sbuf[128];
2323 void *mbuf = NULL;
1d94aa36 2324 void *parg = (void *)arg;
069b7479 2325 long err = -EINVAL;
d14e6d76
PO		 2326 bool has_array_args;
2327 size_t array_size = 0;
35ea11ff 2328 void __user *user_ptr = NULL;
d14e6d76 2329 void **kernel_ptr = NULL;
35ea11ff 2330
35ea11ff 2331 /* Copy arguments into temp kernel buffer */
337f9d20 2332 if (_IOC_DIR(cmd) != _IOC_NONE) {
35ea11ff
HV		 2333 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2334 parg = sbuf;
2335 } else {
2336 /* too big to allocate from stack */
2337 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2338 if (NULL == mbuf)
2339 return -ENOMEM;
2340 parg = mbuf;
2341 }
2342
2343 err = -EFAULT;
19c96e4b 2344 if (_IOC_DIR(cmd) & _IOC_WRITE) {
27cd2aba
HV		 2345 unsigned int n = _IOC_SIZE(cmd);
2346
2347 /*
2348 * In some cases, only a few fields are used as input,
2349 * i.e. when the app sets "index" and then the driver
2350 * fills in the rest of the structure for the thing
2351 * with that index. We only need to copy up the first
2352 * non-input field.
2353 */
2354 if (v4l2_is_known_ioctl(cmd)) {
2355 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2356 if (flags & INFO_FL_CLEAR_MASK)
2357 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2358 }
19c96e4b
TP		 2359
2360 if (copy_from_user(parg, (void __user *)arg, n))
35ea11ff 2361 goto out;
19c96e4b
TP		 2362
2363 /* zero out anything we don't copy from userspace */
2364 if (n < _IOC_SIZE(cmd))
2365 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
337f9d20
TP		 2366 } else {
2367 /* read-only ioctl */
2368 memset(parg, 0, _IOC_SIZE(cmd));
19c96e4b 2369 }
35ea11ff
HV		 2370 }
2371
d14e6d76
PO		 2372 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2373 if (err < 0)
2374 goto out;
2375 has_array_args = err;
35ea11ff 2376
d14e6d76
PO		 2377 if (has_array_args) {
2378 /*
2379 * When adding new types of array args, make sure that the
2380 * parent argument to ioctl (which contains the pointer to the
2381 * array) fits into sbuf (so that mbuf will still remain
2382 * unused up to here).
2383 */
2384 mbuf = kmalloc(array_size, GFP_KERNEL);
2385 err = -ENOMEM;
2386 if (NULL == mbuf)
2387 goto out_array_args;
2388 err = -EFAULT;
2389 if (copy_from_user(mbuf, user_ptr, array_size))
2390 goto out_array_args;
2391 *kernel_ptr = mbuf;
35ea11ff
HV		 2392 }
2393
2394 /* Handles IOCTL */
fc0a8079 2395 err = func(file, cmd, parg);
35ea11ff 2396 if (err == -ENOIOCTLCMD)
02bbb814 2397 err = -ENOTTY;
35ea11ff 2398
d14e6d76
PO		 2399 if (has_array_args) {
2400 *kernel_ptr = user_ptr;
2401 if (copy_to_user(user_ptr, mbuf, array_size))
35ea11ff 2402 err = -EFAULT;
d14e6d76 2403 goto out_array_args;
35ea11ff 2404 }
5d7758ee
HV		 2405 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2406 results that must be returned. */
2407 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
35ea11ff
HV		 2408 goto out;
2409
d14e6d76 2410out_array_args:
35ea11ff
HV		 2411 /* Copy results into user buffer */
2412 switch (_IOC_DIR(cmd)) {
2413 case _IOC_READ:
2414 case (_IOC_WRITE | _IOC_READ):
2415 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2416 err = -EFAULT;
2417 break;
2418 }
2419
2420out:
2421 kfree(mbuf);
2422 return err;
2423}
fc0a8079
LP		 2424EXPORT_SYMBOL(video_usercopy);
2425
2426long video_ioctl2(struct file *file,
2427 unsigned int cmd, unsigned long arg)
2428{
2429 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2430}
8a522c91 2431EXPORT_SYMBOL(video_ioctl2);
kernel source for telekom puls (alcatel/mediatek)