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initial commit with v3.6.7
[linux-3.6.7-moxart.git] / drivers / media / video / v4l2-ioctl.c
blob6bc47fc82fe2f799bfff8a3f885fae27bf1a0aa0
1 /*
2 * Video capture interface for Linux version 2
3 *
4 * A generic framework to process V4L2 ioctl commands.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13 */
14
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/types.h>
18 #include <linux/kernel.h>
19 #include <linux/version.h>
20
21 #include <linux/videodev2.h>
22
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/v4l2-ctrls.h>
26 #include <media/v4l2-fh.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <media/videobuf2-core.h>
31
32 /* Zero out the end of the struct pointed to by p. Everything after, but
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
38 struct std_descr {
39 v4l2_std_id std;
40 const char *descr;
41 };
42
43 static const struct std_descr standards[] = {
44 { V4L2_STD_NTSC, "NTSC" },
45 { V4L2_STD_NTSC_M, "NTSC-M" },
46 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
47 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
48 { V4L2_STD_NTSC_443, "NTSC-443" },
49 { V4L2_STD_PAL, "PAL" },
50 { V4L2_STD_PAL_BG, "PAL-BG" },
51 { V4L2_STD_PAL_B, "PAL-B" },
52 { V4L2_STD_PAL_B1, "PAL-B1" },
53 { V4L2_STD_PAL_G, "PAL-G" },
54 { V4L2_STD_PAL_H, "PAL-H" },
55 { V4L2_STD_PAL_I, "PAL-I" },
56 { V4L2_STD_PAL_DK, "PAL-DK" },
57 { V4L2_STD_PAL_D, "PAL-D" },
58 { V4L2_STD_PAL_D1, "PAL-D1" },
59 { V4L2_STD_PAL_K, "PAL-K" },
60 { V4L2_STD_PAL_M, "PAL-M" },
61 { V4L2_STD_PAL_N, "PAL-N" },
62 { V4L2_STD_PAL_Nc, "PAL-Nc" },
63 { V4L2_STD_PAL_60, "PAL-60" },
64 { V4L2_STD_SECAM, "SECAM" },
65 { V4L2_STD_SECAM_B, "SECAM-B" },
66 { V4L2_STD_SECAM_G, "SECAM-G" },
67 { V4L2_STD_SECAM_H, "SECAM-H" },
68 { V4L2_STD_SECAM_DK, "SECAM-DK" },
69 { V4L2_STD_SECAM_D, "SECAM-D" },
70 { V4L2_STD_SECAM_K, "SECAM-K" },
71 { V4L2_STD_SECAM_K1, "SECAM-K1" },
72 { V4L2_STD_SECAM_L, "SECAM-L" },
73 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
74 { 0, "Unknown" }
75 };
76
77 /* video4linux standard ID conversion to standard name
78 */
79 const char *v4l2_norm_to_name(v4l2_std_id id)
80 {
81 u32 myid = id;
82 int i;
83
84 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
85 64 bit comparations. So, on that architecture, with some gcc
86 variants, compilation fails. Currently, the max value is 30bit wide.
87 */
88 BUG_ON(myid != id);
89
90 for (i = 0; standards[i].std; i++)
91 if (myid == standards[i].std)
92 break;
93 return standards[i].descr;
94 }
95 EXPORT_SYMBOL(v4l2_norm_to_name);
96
97 /* Returns frame period for the given standard */
98 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
99 {
100 if (id & V4L2_STD_525_60) {
101 frameperiod->numerator = 1001;
102 frameperiod->denominator = 30000;
103 } else {
104 frameperiod->numerator = 1;
105 frameperiod->denominator = 25;
106 }
107 }
108 EXPORT_SYMBOL(v4l2_video_std_frame_period);
109
110 /* Fill in the fields of a v4l2_standard structure according to the
111 'id' and 'transmission' parameters. Returns negative on error. */
112 int v4l2_video_std_construct(struct v4l2_standard *vs,
113 int id, const char *name)
114 {
115 vs->id = id;
116 v4l2_video_std_frame_period(id, &vs->frameperiod);
117 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
118 strlcpy(vs->name, name, sizeof(vs->name));
119 return 0;
120 }
121 EXPORT_SYMBOL(v4l2_video_std_construct);
122
123 /* ----------------------------------------------------------------- */
124 /* some arrays for pretty-printing debug messages of enum types */
125
126 const char *v4l2_field_names[] = {
127 [V4L2_FIELD_ANY] = "any",
128 [V4L2_FIELD_NONE] = "none",
129 [V4L2_FIELD_TOP] = "top",
130 [V4L2_FIELD_BOTTOM] = "bottom",
131 [V4L2_FIELD_INTERLACED] = "interlaced",
132 [V4L2_FIELD_SEQ_TB] = "seq-tb",
133 [V4L2_FIELD_SEQ_BT] = "seq-bt",
134 [V4L2_FIELD_ALTERNATE] = "alternate",
135 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
136 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
137 };
138 EXPORT_SYMBOL(v4l2_field_names);
139
140 const char *v4l2_type_names[] = {
141 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
142 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
143 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
144 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
145 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
146 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
147 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
148 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
149 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
150 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
151 };
152 EXPORT_SYMBOL(v4l2_type_names);
153
154 static const char *v4l2_memory_names[] = {
155 [V4L2_MEMORY_MMAP] = "mmap",
156 [V4L2_MEMORY_USERPTR] = "userptr",
157 [V4L2_MEMORY_OVERLAY] = "overlay",
158 };
159
160 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
161 arr[a] : "unknown")
162
163 /* ------------------------------------------------------------------ */
164 /* debug help functions */
165
166 static void v4l_print_querycap(const void *arg, bool write_only)
167 {
168 const struct v4l2_capability *p = arg;
169
170 pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, "
171 "capabilities=0x%08x, device_caps=0x%08x\n",
172 p->driver, p->card, p->bus_info,
173 p->version, p->capabilities, p->device_caps);
174 }
175
176 static void v4l_print_enuminput(const void *arg, bool write_only)
177 {
178 const struct v4l2_input *p = arg;
179
180 pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, "
181 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
182 p->index, p->name, p->type, p->audioset, p->tuner,
183 (unsigned long long)p->std, p->status, p->capabilities);
184 }
185
186 static void v4l_print_enumoutput(const void *arg, bool write_only)
187 {
188 const struct v4l2_output *p = arg;
189
190 pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, "
191 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
192 p->index, p->name, p->type, p->audioset, p->modulator,
193 (unsigned long long)p->std, p->capabilities);
194 }
195
196 static void v4l_print_audio(const void *arg, bool write_only)
197 {
198 const struct v4l2_audio *p = arg;
199
200 if (write_only)
201 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
202 else
203 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
204 p->index, p->name, p->capability, p->mode);
205 }
206
207 static void v4l_print_audioout(const void *arg, bool write_only)
208 {
209 const struct v4l2_audioout *p = arg;
210
211 if (write_only)
212 pr_cont("index=%u\n", p->index);
213 else
214 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
215 p->index, p->name, p->capability, p->mode);
216 }
217
218 static void v4l_print_fmtdesc(const void *arg, bool write_only)
219 {
220 const struct v4l2_fmtdesc *p = arg;
221
222 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n",
223 p->index, prt_names(p->type, v4l2_type_names),
224 p->flags, (p->pixelformat & 0xff),
225 (p->pixelformat >> 8) & 0xff,
226 (p->pixelformat >> 16) & 0xff,
227 (p->pixelformat >> 24) & 0xff,
228 p->description);
229 }
230
231 static void v4l_print_format(const void *arg, bool write_only)
232 {
233 const struct v4l2_format *p = arg;
234 const struct v4l2_pix_format *pix;
235 const struct v4l2_pix_format_mplane *mp;
236 const struct v4l2_vbi_format *vbi;
237 const struct v4l2_sliced_vbi_format *sliced;
238 const struct v4l2_window *win;
239 const struct v4l2_clip *clip;
240 unsigned i;
241
242 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
243 switch (p->type) {
244 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
245 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
246 pix = &p->fmt.pix;
247 pr_cont(", width=%u, height=%u, "
248 "pixelformat=%c%c%c%c, field=%s, "
249 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
250 pix->width, pix->height,
251 (pix->pixelformat & 0xff),
252 (pix->pixelformat >> 8) & 0xff,
253 (pix->pixelformat >> 16) & 0xff,
254 (pix->pixelformat >> 24) & 0xff,
255 prt_names(pix->field, v4l2_field_names),
256 pix->bytesperline, pix->sizeimage,
257 pix->colorspace);
258 break;
259 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
260 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
261 mp = &p->fmt.pix_mp;
262 pr_cont(", width=%u, height=%u, "
263 "format=%c%c%c%c, field=%s, "
264 "colorspace=%d, num_planes=%u\n",
265 mp->width, mp->height,
266 (mp->pixelformat & 0xff),
267 (mp->pixelformat >> 8) & 0xff,
268 (mp->pixelformat >> 16) & 0xff,
269 (mp->pixelformat >> 24) & 0xff,
270 prt_names(mp->field, v4l2_field_names),
271 mp->colorspace, mp->num_planes);
272 for (i = 0; i < mp->num_planes; i++)
273 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
274 mp->plane_fmt[i].bytesperline,
275 mp->plane_fmt[i].sizeimage);
276 break;
277 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
278 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
279 win = &p->fmt.win;
280 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
281 "chromakey=0x%08x, bitmap=%p, "
282 "global_alpha=0x%02x\n",
283 win->w.width, win->w.height,
284 win->w.left, win->w.top,
285 prt_names(win->field, v4l2_field_names),
286 win->chromakey, win->bitmap, win->global_alpha);
287 clip = win->clips;
288 for (i = 0; i < win->clipcount; i++) {
289 printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
290 i, clip->c.width, clip->c.height,
291 clip->c.left, clip->c.top);
292 clip = clip->next;
293 }
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;
319 case V4L2_BUF_TYPE_PRIVATE:
320 pr_cont("\n");
321 break;
322 }
323 }
324
325 static void v4l_print_framebuffer(const void *arg, bool write_only)
326 {
327 const struct v4l2_framebuffer *p = arg;
328
329 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
330 "height=%u, pixelformat=%c%c%c%c, "
331 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
332 p->capability, p->flags, p->base,
333 p->fmt.width, p->fmt.height,
334 (p->fmt.pixelformat & 0xff),
335 (p->fmt.pixelformat >> 8) & 0xff,
336 (p->fmt.pixelformat >> 16) & 0xff,
337 (p->fmt.pixelformat >> 24) & 0xff,
338 p->fmt.bytesperline, p->fmt.sizeimage,
339 p->fmt.colorspace);
340 }
341
342 static void v4l_print_buftype(const void *arg, bool write_only)
343 {
344 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
345 }
346
347 static void v4l_print_modulator(const void *arg, bool write_only)
348 {
349 const struct v4l2_modulator *p = arg;
350
351 if (write_only)
352 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
353 else
354 pr_cont("index=%u, name=%s, capability=0x%x, "
355 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
356 p->index, p->name, p->capability,
357 p->rangelow, p->rangehigh, p->txsubchans);
358 }
359
360 static void v4l_print_tuner(const void *arg, bool write_only)
361 {
362 const struct v4l2_tuner *p = arg;
363
364 if (write_only)
365 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
366 else
367 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, "
368 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
369 "rxsubchans=0x%x, audmode=%u\n",
370 p->index, p->name, p->type,
371 p->capability, p->rangelow,
372 p->rangehigh, p->signal, p->afc,
373 p->rxsubchans, p->audmode);
374 }
375
376 static void v4l_print_frequency(const void *arg, bool write_only)
377 {
378 const struct v4l2_frequency *p = arg;
379
380 pr_cont("tuner=%u, type=%u, frequency=%u\n",
381 p->tuner, p->type, p->frequency);
382 }
383
384 static void v4l_print_standard(const void *arg, bool write_only)
385 {
386 const struct v4l2_standard *p = arg;
387
388 pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, "
389 "framelines=%u\n", p->index,
390 (unsigned long long)p->id, p->name,
391 p->frameperiod.numerator,
392 p->frameperiod.denominator,
393 p->framelines);
394 }
395
396 static void v4l_print_std(const void *arg, bool write_only)
397 {
398 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
399 }
400
401 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
402 {
403 const struct v4l2_hw_freq_seek *p = arg;
404
405 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
406 "rangelow=%u, rangehigh=%u\n",
407 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
408 p->rangelow, p->rangehigh);
409 }
410
411 static void v4l_print_requestbuffers(const void *arg, bool write_only)
412 {
413 const struct v4l2_requestbuffers *p = arg;
414
415 pr_cont("count=%d, type=%s, memory=%s\n",
416 p->count,
417 prt_names(p->type, v4l2_type_names),
418 prt_names(p->memory, v4l2_memory_names));
419 }
420
421 static void v4l_print_buffer(const void *arg, bool write_only)
422 {
423 const struct v4l2_buffer *p = arg;
424 const struct v4l2_timecode *tc = &p->timecode;
425 const struct v4l2_plane *plane;
426 int i;
427
428 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
429 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
430 p->timestamp.tv_sec / 3600,
431 (int)(p->timestamp.tv_sec / 60) % 60,
432 (int)(p->timestamp.tv_sec % 60),
433 (long)p->timestamp.tv_usec,
434 p->index,
435 prt_names(p->type, v4l2_type_names),
436 p->flags, prt_names(p->field, v4l2_field_names),
437 p->sequence, prt_names(p->memory, v4l2_memory_names));
438
439 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
440 pr_cont("\n");
441 for (i = 0; i < p->length; ++i) {
442 plane = &p->m.planes[i];
443 printk(KERN_DEBUG
444 "plane %d: bytesused=%d, data_offset=0x%08x "
445 "offset/userptr=0x%lx, length=%d\n",
446 i, plane->bytesused, plane->data_offset,
447 plane->m.userptr, plane->length);
448 }
449 } else {
450 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
451 p->bytesused, p->m.userptr, p->length);
452 }
453
454 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
455 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
456 tc->hours, tc->minutes, tc->seconds,
457 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
458 }
459
460 static void v4l_print_create_buffers(const void *arg, bool write_only)
461 {
462 const struct v4l2_create_buffers *p = arg;
463
464 pr_cont("index=%d, count=%d, memory=%s, ",
465 p->index, p->count,
466 prt_names(p->memory, v4l2_memory_names));
467 v4l_print_format(&p->format, write_only);
468 }
469
470 static void v4l_print_streamparm(const void *arg, bool write_only)
471 {
472 const struct v4l2_streamparm *p = arg;
473
474 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
475
476 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
477 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
478 const struct v4l2_captureparm *c = &p->parm.capture;
479
480 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
481 "extendedmode=%d, readbuffers=%d\n",
482 c->capability, c->capturemode,
483 c->timeperframe.numerator, c->timeperframe.denominator,
484 c->extendedmode, c->readbuffers);
485 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
486 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
487 const struct v4l2_outputparm *c = &p->parm.output;
488
489 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
490 "extendedmode=%d, writebuffers=%d\n",
491 c->capability, c->outputmode,
492 c->timeperframe.numerator, c->timeperframe.denominator,
493 c->extendedmode, c->writebuffers);
494 }
495 }
496
497 static void v4l_print_queryctrl(const void *arg, bool write_only)
498 {
499 const struct v4l2_queryctrl *p = arg;
500
501 pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, "
502 "step=%d, default=%d, flags=0x%08x\n",
503 p->id, p->type, p->name,
504 p->minimum, p->maximum,
505 p->step, p->default_value, p->flags);
506 }
507
508 static void v4l_print_querymenu(const void *arg, bool write_only)
509 {
510 const struct v4l2_querymenu *p = arg;
511
512 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
513 }
514
515 static void v4l_print_control(const void *arg, bool write_only)
516 {
517 const struct v4l2_control *p = arg;
518
519 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
520 }
521
522 static void v4l_print_ext_controls(const void *arg, bool write_only)
523 {
524 const struct v4l2_ext_controls *p = arg;
525 int i;
526
527 pr_cont("class=0x%x, count=%d, error_idx=%d",
528 p->ctrl_class, p->count, p->error_idx);
529 for (i = 0; i < p->count; i++) {
530 if (p->controls[i].size)
531 pr_cont(", id/val=0x%x/0x%x",
532 p->controls[i].id, p->controls[i].value);
533 else
534 pr_cont(", id/size=0x%x/%u",
535 p->controls[i].id, p->controls[i].size);
536 }
537 pr_cont("\n");
538 }
539
540 static void v4l_print_cropcap(const void *arg, bool write_only)
541 {
542 const struct v4l2_cropcap *p = arg;
543
544 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
545 "defrect wxh=%dx%d, x,y=%d,%d\n, "
546 "pixelaspect %d/%d\n",
547 prt_names(p->type, v4l2_type_names),
548 p->bounds.width, p->bounds.height,
549 p->bounds.left, p->bounds.top,
550 p->defrect.width, p->defrect.height,
551 p->defrect.left, p->defrect.top,
552 p->pixelaspect.numerator, p->pixelaspect.denominator);
553 }
554
555 static void v4l_print_crop(const void *arg, bool write_only)
556 {
557 const struct v4l2_crop *p = arg;
558
559 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
560 prt_names(p->type, v4l2_type_names),
561 p->c.width, p->c.height,
562 p->c.left, p->c.top);
563 }
564
565 static void v4l_print_selection(const void *arg, bool write_only)
566 {
567 const struct v4l2_selection *p = arg;
568
569 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
570 prt_names(p->type, v4l2_type_names),
571 p->target, p->flags,
572 p->r.width, p->r.height, p->r.left, p->r.top);
573 }
574
575 static void v4l_print_jpegcompression(const void *arg, bool write_only)
576 {
577 const struct v4l2_jpegcompression *p = arg;
578
579 pr_cont("quality=%d, APPn=%d, APP_len=%d, "
580 "COM_len=%d, jpeg_markers=0x%x\n",
581 p->quality, p->APPn, p->APP_len,
582 p->COM_len, p->jpeg_markers);
583 }
584
585 static void v4l_print_enc_idx(const void *arg, bool write_only)
586 {
587 const struct v4l2_enc_idx *p = arg;
588
589 pr_cont("entries=%d, entries_cap=%d\n",
590 p->entries, p->entries_cap);
591 }
592
593 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
594 {
595 const struct v4l2_encoder_cmd *p = arg;
596
597 pr_cont("cmd=%d, flags=0x%x\n",
598 p->cmd, p->flags);
599 }
600
601 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
602 {
603 const struct v4l2_decoder_cmd *p = arg;
604
605 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
606
607 if (p->cmd == V4L2_DEC_CMD_START)
608 pr_info("speed=%d, format=%u\n",
609 p->start.speed, p->start.format);
610 else if (p->cmd == V4L2_DEC_CMD_STOP)
611 pr_info("pts=%llu\n", p->stop.pts);
612 }
613
614 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
615 {
616 const struct v4l2_dbg_chip_ident *p = arg;
617
618 pr_cont("type=%u, ", p->match.type);
619 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
620 pr_cont("name=%s, ", p->match.name);
621 else
622 pr_cont("addr=%u, ", p->match.addr);
623 pr_cont("chip_ident=%u, revision=0x%x\n",
624 p->ident, p->revision);
625 }
626
627 static void v4l_print_dbg_register(const void *arg, bool write_only)
628 {
629 const struct v4l2_dbg_register *p = arg;
630
631 pr_cont("type=%u, ", p->match.type);
632 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
633 pr_cont("name=%s, ", p->match.name);
634 else
635 pr_cont("addr=%u, ", p->match.addr);
636 pr_cont("reg=0x%llx, val=0x%llx\n",
637 p->reg, p->val);
638 }
639
640 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
641 {
642 const struct v4l2_dv_enum_preset *p = arg;
643
644 pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n",
645 p->index, p->preset, p->name, p->width, p->height);
646 }
647
648 static void v4l_print_dv_preset(const void *arg, bool write_only)
649 {
650 const struct v4l2_dv_preset *p = arg;
651
652 pr_cont("preset=%u\n", p->preset);
653 }
654
655 static void v4l_print_dv_timings(const void *arg, bool write_only)
656 {
657 const struct v4l2_dv_timings *p = arg;
658
659 switch (p->type) {
660 case V4L2_DV_BT_656_1120:
661 pr_cont("type=bt-656/1120, interlaced=%u, "
662 "pixelclock=%llu, "
663 "width=%u, height=%u, polarities=0x%x, "
664 "hfrontporch=%u, hsync=%u, "
665 "hbackporch=%u, vfrontporch=%u, "
666 "vsync=%u, vbackporch=%u, "
667 "il_vfrontporch=%u, il_vsync=%u, "
668 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
669 p->bt.interlaced, p->bt.pixelclock,
670 p->bt.width, p->bt.height,
671 p->bt.polarities, p->bt.hfrontporch,
672 p->bt.hsync, p->bt.hbackporch,
673 p->bt.vfrontporch, p->bt.vsync,
674 p->bt.vbackporch, p->bt.il_vfrontporch,
675 p->bt.il_vsync, p->bt.il_vbackporch,
676 p->bt.standards, p->bt.flags);
677 break;
678 default:
679 pr_cont("type=%d\n", p->type);
680 break;
681 }
682 }
683
684 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
685 {
686 const struct v4l2_enum_dv_timings *p = arg;
687
688 pr_cont("index=%u, ", p->index);
689 v4l_print_dv_timings(&p->timings, write_only);
690 }
691
692 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
693 {
694 const struct v4l2_dv_timings_cap *p = arg;
695
696 switch (p->type) {
697 case V4L2_DV_BT_656_1120:
698 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
699 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
700 p->bt.min_width, p->bt.max_width,
701 p->bt.min_height, p->bt.max_height,
702 p->bt.min_pixelclock, p->bt.max_pixelclock,
703 p->bt.standards, p->bt.capabilities);
704 break;
705 default:
706 pr_cont("type=%u\n", p->type);
707 break;
708 }
709 }
710
711 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
712 {
713 const struct v4l2_frmsizeenum *p = arg;
714
715 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
716 p->index,
717 (p->pixel_format & 0xff),
718 (p->pixel_format >> 8) & 0xff,
719 (p->pixel_format >> 16) & 0xff,
720 (p->pixel_format >> 24) & 0xff,
721 p->type);
722 switch (p->type) {
723 case V4L2_FRMSIZE_TYPE_DISCRETE:
724 pr_cont(" wxh=%ux%u\n",
725 p->discrete.width, p->discrete.height);
726 break;
727 case V4L2_FRMSIZE_TYPE_STEPWISE:
728 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
729 p->stepwise.min_width, p->stepwise.min_height,
730 p->stepwise.step_width, p->stepwise.step_height,
731 p->stepwise.max_width, p->stepwise.max_height);
732 break;
733 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
734 /* fall through */
735 default:
736 pr_cont("\n");
737 break;
738 }
739 }
740
741 static void v4l_print_frmivalenum(const void *arg, bool write_only)
742 {
743 const struct v4l2_frmivalenum *p = arg;
744
745 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
746 p->index,
747 (p->pixel_format & 0xff),
748 (p->pixel_format >> 8) & 0xff,
749 (p->pixel_format >> 16) & 0xff,
750 (p->pixel_format >> 24) & 0xff,
751 p->width, p->height, p->type);
752 switch (p->type) {
753 case V4L2_FRMIVAL_TYPE_DISCRETE:
754 pr_cont(" fps=%d/%d\n",
755 p->discrete.numerator,
756 p->discrete.denominator);
757 break;
758 case V4L2_FRMIVAL_TYPE_STEPWISE:
759 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
760 p->stepwise.min.numerator,
761 p->stepwise.min.denominator,
762 p->stepwise.max.numerator,
763 p->stepwise.max.denominator,
764 p->stepwise.step.numerator,
765 p->stepwise.step.denominator);
766 break;
767 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
768 /* fall through */
769 default:
770 pr_cont("\n");
771 break;
772 }
773 }
774
775 static void v4l_print_event(const void *arg, bool write_only)
776 {
777 const struct v4l2_event *p = arg;
778 const struct v4l2_event_ctrl *c;
779
780 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
781 "timestamp=%lu.%9.9lu\n",
782 p->type, p->pending, p->sequence, p->id,
783 p->timestamp.tv_sec, p->timestamp.tv_nsec);
784 switch (p->type) {
785 case V4L2_EVENT_VSYNC:
786 printk(KERN_DEBUG "field=%s\n",
787 prt_names(p->u.vsync.field, v4l2_field_names));
788 break;
789 case V4L2_EVENT_CTRL:
790 c = &p->u.ctrl;
791 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
792 c->changes, c->type);
793 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
794 pr_cont("value64=%lld, ", c->value64);
795 else
796 pr_cont("value=%d, ", c->value);
797 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
798 " default_value=%d\n",
799 c->flags, c->minimum, c->maximum,
800 c->step, c->default_value);
801 break;
802 case V4L2_EVENT_FRAME_SYNC:
803 pr_cont("frame_sequence=%u\n",
804 p->u.frame_sync.frame_sequence);
805 break;
806 }
807 }
808
809 static void v4l_print_event_subscription(const void *arg, bool write_only)
810 {
811 const struct v4l2_event_subscription *p = arg;
812
813 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
814 p->type, p->id, p->flags);
815 }
816
817 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
818 {
819 const struct v4l2_sliced_vbi_cap *p = arg;
820 int i;
821
822 pr_cont("type=%s, service_set=0x%08x\n",
823 prt_names(p->type, v4l2_type_names), p->service_set);
824 for (i = 0; i < 24; i++)
825 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
826 p->service_lines[0][i],
827 p->service_lines[1][i]);
828 }
829
830 static void v4l_print_freq_band(const void *arg, bool write_only)
831 {
832 const struct v4l2_frequency_band *p = arg;
833
834 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
835 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
836 p->tuner, p->type, p->index,
837 p->capability, p->rangelow,
838 p->rangehigh, p->modulation);
839 }
840
841 static void v4l_print_u32(const void *arg, bool write_only)
842 {
843 pr_cont("value=%u\n", *(const u32 *)arg);
844 }
845
846 static void v4l_print_newline(const void *arg, bool write_only)
847 {
848 pr_cont("\n");
849 }
850
851 static void v4l_print_default(const void *arg, bool write_only)
852 {
853 pr_cont("driver-specific ioctl\n");
854 }
855
856 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
857 {
858 __u32 i;
859
860 /* zero the reserved fields */
861 c->reserved[0] = c->reserved[1] = 0;
862 for (i = 0; i < c->count; i++)
863 c->controls[i].reserved2[0] = 0;
864
865 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
866 when using extended controls.
867 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
868 is it allowed for backwards compatibility.
869 */
870 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
871 return 0;
872 /* Check that all controls are from the same control class. */
873 for (i = 0; i < c->count; i++) {
874 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
875 c->error_idx = i;
876 return 0;
877 }
878 }
879 return 1;
880 }
881
882 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
883 {
884 if (ops == NULL)
885 return -EINVAL;
886
887 switch (type) {
888 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
889 if (ops->vidioc_g_fmt_vid_cap ||
890 ops->vidioc_g_fmt_vid_cap_mplane)
891 return 0;
892 break;
893 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
894 if (ops->vidioc_g_fmt_vid_cap_mplane)
895 return 0;
896 break;
897 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
898 if (ops->vidioc_g_fmt_vid_overlay)
899 return 0;
900 break;
901 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
902 if (ops->vidioc_g_fmt_vid_out ||
903 ops->vidioc_g_fmt_vid_out_mplane)
904 return 0;
905 break;
906 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
907 if (ops->vidioc_g_fmt_vid_out_mplane)
908 return 0;
909 break;
910 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
911 if (ops->vidioc_g_fmt_vid_out_overlay)
912 return 0;
913 break;
914 case V4L2_BUF_TYPE_VBI_CAPTURE:
915 if (ops->vidioc_g_fmt_vbi_cap)
916 return 0;
917 break;
918 case V4L2_BUF_TYPE_VBI_OUTPUT:
919 if (ops->vidioc_g_fmt_vbi_out)
920 return 0;
921 break;
922 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
923 if (ops->vidioc_g_fmt_sliced_vbi_cap)
924 return 0;
925 break;
926 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
927 if (ops->vidioc_g_fmt_sliced_vbi_out)
928 return 0;
929 break;
930 case V4L2_BUF_TYPE_PRIVATE:
931 if (ops->vidioc_g_fmt_type_private)
932 return 0;
933 break;
934 }
935 return -EINVAL;
936 }
937
938 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
939 struct file *file, void *fh, void *arg)
940 {
941 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
942
943 cap->version = LINUX_VERSION_CODE;
944 return ops->vidioc_querycap(file, fh, cap);
945 }
946
947 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
948 struct file *file, void *fh, void *arg)
949 {
950 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
951 }
952
953 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
954 struct file *file, void *fh, void *arg)
955 {
956 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
957 }
958
959 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
960 struct file *file, void *fh, void *arg)
961 {
962 struct video_device *vfd;
963 u32 *p = arg;
964
965 if (ops->vidioc_g_priority)
966 return ops->vidioc_g_priority(file, fh, arg);
967 vfd = video_devdata(file);
968 *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
969 return 0;
970 }
971
972 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
973 struct file *file, void *fh, void *arg)
974 {
975 struct video_device *vfd;
976 struct v4l2_fh *vfh;
977 u32 *p = arg;
978
979 if (ops->vidioc_s_priority)
980 return ops->vidioc_s_priority(file, fh, *p);
981 vfd = video_devdata(file);
982 vfh = file->private_data;
983 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
984 }
985
986 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
987 struct file *file, void *fh, void *arg)
988 {
989 struct v4l2_input *p = arg;
990
991 /*
992 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
993 * CAP_STD here based on ioctl handler provided by the
994 * driver. If the driver doesn't support these
995 * for a specific input, it must override these flags.
996 */
997 if (ops->vidioc_s_std)
998 p->capabilities |= V4L2_IN_CAP_STD;
999 if (ops->vidioc_s_dv_preset)
1000 p->capabilities |= V4L2_IN_CAP_PRESETS;
1001 if (ops->vidioc_s_dv_timings)
1002 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1003
1004 return ops->vidioc_enum_input(file, fh, p);
1005 }
1006
1007 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1008 struct file *file, void *fh, void *arg)
1009 {
1010 struct v4l2_output *p = arg;
1011
1012 /*
1013 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1014 * CAP_STD here based on ioctl handler provided by the
1015 * driver. If the driver doesn't support these
1016 * for a specific output, it must override these flags.
1017 */
1018 if (ops->vidioc_s_std)
1019 p->capabilities |= V4L2_OUT_CAP_STD;
1020 if (ops->vidioc_s_dv_preset)
1021 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1022 if (ops->vidioc_s_dv_timings)
1023 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1024
1025 return ops->vidioc_enum_output(file, fh, p);
1026 }
1027
1028 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1029 struct file *file, void *fh, void *arg)
1030 {
1031 struct v4l2_fmtdesc *p = arg;
1032
1033 switch (p->type) {
1034 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1035 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1036 break;
1037 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1038 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1039 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1040 break;
1041 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1042 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1043 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1044 break;
1045 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1046 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1047 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1048 break;
1049 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1050 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1051 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1052 break;
1053 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1054 case V4L2_BUF_TYPE_PRIVATE:
1055 if (unlikely(!ops->vidioc_enum_fmt_type_private))
1056 break;
1057 return ops->vidioc_enum_fmt_type_private(file, fh, arg);
1058 }
1059 return -EINVAL;
1060 }
1061
1062 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1063 struct file *file, void *fh, void *arg)
1064 {
1065 struct v4l2_format *p = arg;
1066
1067 switch (p->type) {
1068 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1069 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1070 break;
1071 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1072 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1073 if (unlikely(!ops->vidioc_g_fmt_vid_cap_mplane))
1074 break;
1075 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1076 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1077 if (unlikely(!ops->vidioc_g_fmt_vid_overlay))
1078 break;
1079 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1080 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1081 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1082 break;
1083 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1084 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1085 if (unlikely(!ops->vidioc_g_fmt_vid_out_mplane))
1086 break;
1087 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1088 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1089 if (unlikely(!ops->vidioc_g_fmt_vid_out_overlay))
1090 break;
1091 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1092 case V4L2_BUF_TYPE_VBI_CAPTURE:
1093 if (unlikely(!ops->vidioc_g_fmt_vbi_cap))
1094 break;
1095 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1096 case V4L2_BUF_TYPE_VBI_OUTPUT:
1097 if (unlikely(!ops->vidioc_g_fmt_vbi_out))
1098 break;
1099 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1100 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1101 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_cap))
1102 break;
1103 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1104 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1105 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_out))
1106 break;
1107 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1108 case V4L2_BUF_TYPE_PRIVATE:
1109 if (unlikely(!ops->vidioc_g_fmt_type_private))
1110 break;
1111 return ops->vidioc_g_fmt_type_private(file, fh, arg);
1112 }
1113 return -EINVAL;
1114 }
1115
1116 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1117 struct file *file, void *fh, void *arg)
1118 {
1119 struct v4l2_format *p = arg;
1120
1121 switch (p->type) {
1122 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1123 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1124 break;
1125 CLEAR_AFTER_FIELD(p, fmt.pix);
1126 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1127 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1128 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1129 break;
1130 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1131 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1132 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1133 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1134 break;
1135 CLEAR_AFTER_FIELD(p, fmt.win);
1136 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1137 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1138 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1139 break;
1140 CLEAR_AFTER_FIELD(p, fmt.pix);
1141 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1142 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1143 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1144 break;
1145 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1146 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1147 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1148 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1149 break;
1150 CLEAR_AFTER_FIELD(p, fmt.win);
1151 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1152 case V4L2_BUF_TYPE_VBI_CAPTURE:
1153 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1154 break;
1155 CLEAR_AFTER_FIELD(p, fmt.vbi);
1156 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1157 case V4L2_BUF_TYPE_VBI_OUTPUT:
1158 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1159 break;
1160 CLEAR_AFTER_FIELD(p, fmt.vbi);
1161 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1162 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1163 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1164 break;
1165 CLEAR_AFTER_FIELD(p, fmt.sliced);
1166 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1167 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1168 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1169 break;
1170 CLEAR_AFTER_FIELD(p, fmt.sliced);
1171 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1172 case V4L2_BUF_TYPE_PRIVATE:
1173 if (unlikely(!ops->vidioc_s_fmt_type_private))
1174 break;
1175 return ops->vidioc_s_fmt_type_private(file, fh, arg);
1176 }
1177 return -EINVAL;
1178 }
1179
1180 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1181 struct file *file, void *fh, void *arg)
1182 {
1183 struct v4l2_format *p = arg;
1184
1185 switch (p->type) {
1186 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1187 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1188 break;
1189 CLEAR_AFTER_FIELD(p, fmt.pix);
1190 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1191 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1192 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1193 break;
1194 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1195 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1196 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1197 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1198 break;
1199 CLEAR_AFTER_FIELD(p, fmt.win);
1200 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1201 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1202 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1203 break;
1204 CLEAR_AFTER_FIELD(p, fmt.pix);
1205 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1206 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1207 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1208 break;
1209 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1210 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1211 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1212 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1213 break;
1214 CLEAR_AFTER_FIELD(p, fmt.win);
1215 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1216 case V4L2_BUF_TYPE_VBI_CAPTURE:
1217 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1218 break;
1219 CLEAR_AFTER_FIELD(p, fmt.vbi);
1220 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1221 case V4L2_BUF_TYPE_VBI_OUTPUT:
1222 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1223 break;
1224 CLEAR_AFTER_FIELD(p, fmt.vbi);
1225 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1226 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1227 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1228 break;
1229 CLEAR_AFTER_FIELD(p, fmt.sliced);
1230 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1231 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1232 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1233 break;
1234 CLEAR_AFTER_FIELD(p, fmt.sliced);
1235 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1236 case V4L2_BUF_TYPE_PRIVATE:
1237 if (unlikely(!ops->vidioc_try_fmt_type_private))
1238 break;
1239 return ops->vidioc_try_fmt_type_private(file, fh, arg);
1240 }
1241 return -EINVAL;
1242 }
1243
1244 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1245 struct file *file, void *fh, void *arg)
1246 {
1247 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1248 }
1249
1250 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1251 struct file *file, void *fh, void *arg)
1252 {
1253 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1254 }
1255
1256 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1257 struct file *file, void *fh, void *arg)
1258 {
1259 struct video_device *vfd = video_devdata(file);
1260 struct v4l2_tuner *p = arg;
1261 int err;
1262
1263 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1264 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1265 err = ops->vidioc_g_tuner(file, fh, p);
1266 if (!err)
1267 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1268 return err;
1269 }
1270
1271 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1272 struct file *file, void *fh, void *arg)
1273 {
1274 struct video_device *vfd = video_devdata(file);
1275 struct v4l2_tuner *p = arg;
1276
1277 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1278 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1279 return ops->vidioc_s_tuner(file, fh, p);
1280 }
1281
1282 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1283 struct file *file, void *fh, void *arg)
1284 {
1285 struct v4l2_modulator *p = arg;
1286 int err;
1287
1288 err = ops->vidioc_g_modulator(file, fh, p);
1289 if (!err)
1290 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1291 return err;
1292 }
1293
1294 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1295 struct file *file, void *fh, void *arg)
1296 {
1297 struct video_device *vfd = video_devdata(file);
1298 struct v4l2_frequency *p = arg;
1299
1300 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1301 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1302 return ops->vidioc_g_frequency(file, fh, p);
1303 }
1304
1305 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1306 struct file *file, void *fh, void *arg)
1307 {
1308 struct video_device *vfd = video_devdata(file);
1309 struct v4l2_frequency *p = arg;
1310 enum v4l2_tuner_type type;
1311
1312 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1313 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1314 if (p->type != type)
1315 return -EINVAL;
1316 return ops->vidioc_s_frequency(file, fh, p);
1317 }
1318
1319 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1320 struct file *file, void *fh, void *arg)
1321 {
1322 struct video_device *vfd = video_devdata(file);
1323 struct v4l2_standard *p = arg;
1324 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1325 unsigned int index = p->index, i, j = 0;
1326 const char *descr = "";
1327
1328 /* Return norm array in a canonical way */
1329 for (i = 0; i <= index && id; i++) {
1330 /* last std value in the standards array is 0, so this
1331 while always ends there since (id & 0) == 0. */
1332 while ((id & standards[j].std) != standards[j].std)
1333 j++;
1334 curr_id = standards[j].std;
1335 descr = standards[j].descr;
1336 j++;
1337 if (curr_id == 0)
1338 break;
1339 if (curr_id != V4L2_STD_PAL &&
1340 curr_id != V4L2_STD_SECAM &&
1341 curr_id != V4L2_STD_NTSC)
1342 id &= ~curr_id;
1343 }
1344 if (i <= index)
1345 return -EINVAL;
1346
1347 v4l2_video_std_construct(p, curr_id, descr);
1348 return 0;
1349 }
1350
1351 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1352 struct file *file, void *fh, void *arg)
1353 {
1354 struct video_device *vfd = video_devdata(file);
1355 v4l2_std_id *id = arg;
1356
1357 /* Calls the specific handler */
1358 if (ops->vidioc_g_std)
1359 return ops->vidioc_g_std(file, fh, arg);
1360 if (vfd->current_norm) {
1361 *id = vfd->current_norm;
1362 return 0;
1363 }
1364 return -ENOTTY;
1365 }
1366
1367 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1368 struct file *file, void *fh, void *arg)
1369 {
1370 struct video_device *vfd = video_devdata(file);
1371 v4l2_std_id *id = arg, norm;
1372 int ret;
1373
1374 norm = (*id) & vfd->tvnorms;
1375 if (vfd->tvnorms && !norm) /* Check if std is supported */
1376 return -EINVAL;
1377
1378 /* Calls the specific handler */
1379 ret = ops->vidioc_s_std(file, fh, &norm);
1380
1381 /* Updates standard information */
1382 if (ret >= 0)
1383 vfd->current_norm = norm;
1384 return ret;
1385 }
1386
1387 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1388 struct file *file, void *fh, void *arg)
1389 {
1390 struct video_device *vfd = video_devdata(file);
1391 v4l2_std_id *p = arg;
1392
1393 /*
1394 * If nothing detected, it should return all supported
1395 * standard.
1396 * Drivers just need to mask the std argument, in order
1397 * to remove the standards that don't apply from the mask.
1398 * This means that tuners, audio and video decoders can join
1399 * their efforts to improve the standards detection.
1400 */
1401 *p = vfd->tvnorms;
1402 return ops->vidioc_querystd(file, fh, arg);
1403 }
1404
1405 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1406 struct file *file, void *fh, void *arg)
1407 {
1408 struct video_device *vfd = video_devdata(file);
1409 struct v4l2_hw_freq_seek *p = arg;
1410 enum v4l2_tuner_type type;
1411
1412 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1413 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1414 if (p->type != type)
1415 return -EINVAL;
1416 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1417 }
1418
1419 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1420 struct file *file, void *fh, void *arg)
1421 {
1422 struct v4l2_requestbuffers *p = arg;
1423 int ret = check_fmt(ops, p->type);
1424
1425 if (ret)
1426 return ret;
1427
1428 if (p->type < V4L2_BUF_TYPE_PRIVATE)
1429 CLEAR_AFTER_FIELD(p, memory);
1430
1431 return ops->vidioc_reqbufs(file, fh, p);
1432 }
1433
1434 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1435 struct file *file, void *fh, void *arg)
1436 {
1437 struct v4l2_buffer *p = arg;
1438 int ret = check_fmt(ops, p->type);
1439
1440 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1441 }
1442
1443 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1444 struct file *file, void *fh, void *arg)
1445 {
1446 struct v4l2_buffer *p = arg;
1447 int ret = check_fmt(ops, p->type);
1448
1449 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1450 }
1451
1452 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1453 struct file *file, void *fh, void *arg)
1454 {
1455 struct v4l2_buffer *p = arg;
1456 int ret = check_fmt(ops, p->type);
1457
1458 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1459 }
1460
1461 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1462 struct file *file, void *fh, void *arg)
1463 {
1464 struct v4l2_create_buffers *create = arg;
1465 int ret = check_fmt(ops, create->format.type);
1466
1467 return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1468 }
1469
1470 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1471 struct file *file, void *fh, void *arg)
1472 {
1473 struct v4l2_buffer *b = arg;
1474 int ret = check_fmt(ops, b->type);
1475
1476 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1477 }
1478
1479 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1480 struct file *file, void *fh, void *arg)
1481 {
1482 struct video_device *vfd = video_devdata(file);
1483 struct v4l2_streamparm *p = arg;
1484 v4l2_std_id std;
1485 int ret = check_fmt(ops, p->type);
1486
1487 if (ret)
1488 return ret;
1489 if (ops->vidioc_g_parm)
1490 return ops->vidioc_g_parm(file, fh, p);
1491 std = vfd->current_norm;
1492 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1493 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1494 return -EINVAL;
1495 p->parm.capture.readbuffers = 2;
1496 if (ops->vidioc_g_std)
1497 ret = ops->vidioc_g_std(file, fh, &std);
1498 if (ret == 0)
1499 v4l2_video_std_frame_period(std,
1500 &p->parm.capture.timeperframe);
1501 return ret;
1502 }
1503
1504 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1505 struct file *file, void *fh, void *arg)
1506 {
1507 struct v4l2_streamparm *p = arg;
1508 int ret = check_fmt(ops, p->type);
1509
1510 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1511 }
1512
1513 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1514 struct file *file, void *fh, void *arg)
1515 {
1516 struct video_device *vfd = video_devdata(file);
1517 struct v4l2_queryctrl *p = arg;
1518 struct v4l2_fh *vfh =
1519 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1520
1521 if (vfh && vfh->ctrl_handler)
1522 return v4l2_queryctrl(vfh->ctrl_handler, p);
1523 if (vfd->ctrl_handler)
1524 return v4l2_queryctrl(vfd->ctrl_handler, p);
1525 if (ops->vidioc_queryctrl)
1526 return ops->vidioc_queryctrl(file, fh, p);
1527 return -ENOTTY;
1528 }
1529
1530 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1531 struct file *file, void *fh, void *arg)
1532 {
1533 struct video_device *vfd = video_devdata(file);
1534 struct v4l2_querymenu *p = arg;
1535 struct v4l2_fh *vfh =
1536 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1537
1538 if (vfh && vfh->ctrl_handler)
1539 return v4l2_querymenu(vfh->ctrl_handler, p);
1540 if (vfd->ctrl_handler)
1541 return v4l2_querymenu(vfd->ctrl_handler, p);
1542 if (ops->vidioc_querymenu)
1543 return ops->vidioc_querymenu(file, fh, p);
1544 return -ENOTTY;
1545 }
1546
1547 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1548 struct file *file, void *fh, void *arg)
1549 {
1550 struct video_device *vfd = video_devdata(file);
1551 struct v4l2_control *p = arg;
1552 struct v4l2_fh *vfh =
1553 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1554 struct v4l2_ext_controls ctrls;
1555 struct v4l2_ext_control ctrl;
1556
1557 if (vfh && vfh->ctrl_handler)
1558 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1559 if (vfd->ctrl_handler)
1560 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1561 if (ops->vidioc_g_ctrl)
1562 return ops->vidioc_g_ctrl(file, fh, p);
1563 if (ops->vidioc_g_ext_ctrls == NULL)
1564 return -ENOTTY;
1565
1566 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1567 ctrls.count = 1;
1568 ctrls.controls = &ctrl;
1569 ctrl.id = p->id;
1570 ctrl.value = p->value;
1571 if (check_ext_ctrls(&ctrls, 1)) {
1572 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1573
1574 if (ret == 0)
1575 p->value = ctrl.value;
1576 return ret;
1577 }
1578 return -EINVAL;
1579 }
1580
1581 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1582 struct file *file, void *fh, void *arg)
1583 {
1584 struct video_device *vfd = video_devdata(file);
1585 struct v4l2_control *p = arg;
1586 struct v4l2_fh *vfh =
1587 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1588 struct v4l2_ext_controls ctrls;
1589 struct v4l2_ext_control ctrl;
1590
1591 if (vfh && vfh->ctrl_handler)
1592 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1593 if (vfd->ctrl_handler)
1594 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1595 if (ops->vidioc_s_ctrl)
1596 return ops->vidioc_s_ctrl(file, fh, p);
1597 if (ops->vidioc_s_ext_ctrls == NULL)
1598 return -ENOTTY;
1599
1600 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1601 ctrls.count = 1;
1602 ctrls.controls = &ctrl;
1603 ctrl.id = p->id;
1604 ctrl.value = p->value;
1605 if (check_ext_ctrls(&ctrls, 1))
1606 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1607 return -EINVAL;
1608 }
1609
1610 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1611 struct file *file, void *fh, void *arg)
1612 {
1613 struct video_device *vfd = video_devdata(file);
1614 struct v4l2_ext_controls *p = arg;
1615 struct v4l2_fh *vfh =
1616 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1617
1618 p->error_idx = p->count;
1619 if (vfh && vfh->ctrl_handler)
1620 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1621 if (vfd->ctrl_handler)
1622 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1623 if (ops->vidioc_g_ext_ctrls == NULL)
1624 return -ENOTTY;
1625 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1626 -EINVAL;
1627 }
1628
1629 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1630 struct file *file, void *fh, void *arg)
1631 {
1632 struct video_device *vfd = video_devdata(file);
1633 struct v4l2_ext_controls *p = arg;
1634 struct v4l2_fh *vfh =
1635 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1636
1637 p->error_idx = p->count;
1638 if (vfh && vfh->ctrl_handler)
1639 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1640 if (vfd->ctrl_handler)
1641 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1642 if (ops->vidioc_s_ext_ctrls == NULL)
1643 return -ENOTTY;
1644 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1645 -EINVAL;
1646 }
1647
1648 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1649 struct file *file, void *fh, void *arg)
1650 {
1651 struct video_device *vfd = video_devdata(file);
1652 struct v4l2_ext_controls *p = arg;
1653 struct v4l2_fh *vfh =
1654 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1655
1656 p->error_idx = p->count;
1657 if (vfh && vfh->ctrl_handler)
1658 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1659 if (vfd->ctrl_handler)
1660 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1661 if (ops->vidioc_try_ext_ctrls == NULL)
1662 return -ENOTTY;
1663 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1664 -EINVAL;
1665 }
1666
1667 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1668 struct file *file, void *fh, void *arg)
1669 {
1670 struct v4l2_crop *p = arg;
1671 struct v4l2_selection s = {
1672 .type = p->type,
1673 };
1674 int ret;
1675
1676 if (ops->vidioc_g_crop)
1677 return ops->vidioc_g_crop(file, fh, p);
1678 /* simulate capture crop using selection api */
1679
1680 /* crop means compose for output devices */
1681 if (V4L2_TYPE_IS_OUTPUT(p->type))
1682 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1683 else
1684 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1685
1686 ret = ops->vidioc_g_selection(file, fh, &s);
1687
1688 /* copying results to old structure on success */
1689 if (!ret)
1690 p->c = s.r;
1691 return ret;
1692 }
1693
1694 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1695 struct file *file, void *fh, void *arg)
1696 {
1697 struct v4l2_crop *p = arg;
1698 struct v4l2_selection s = {
1699 .type = p->type,
1700 .r = p->c,
1701 };
1702
1703 if (ops->vidioc_s_crop)
1704 return ops->vidioc_s_crop(file, fh, p);
1705 /* simulate capture crop using selection api */
1706
1707 /* crop means compose for output devices */
1708 if (V4L2_TYPE_IS_OUTPUT(p->type))
1709 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1710 else
1711 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1712
1713 return ops->vidioc_s_selection(file, fh, &s);
1714 }
1715
1716 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1717 struct file *file, void *fh, void *arg)
1718 {
1719 struct v4l2_cropcap *p = arg;
1720 struct v4l2_selection s = { .type = p->type };
1721 int ret;
1722
1723 if (ops->vidioc_cropcap)
1724 return ops->vidioc_cropcap(file, fh, p);
1725
1726 /* obtaining bounds */
1727 if (V4L2_TYPE_IS_OUTPUT(p->type))
1728 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1729 else
1730 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1731
1732 ret = ops->vidioc_g_selection(file, fh, &s);
1733 if (ret)
1734 return ret;
1735 p->bounds = s.r;
1736
1737 /* obtaining defrect */
1738 if (V4L2_TYPE_IS_OUTPUT(p->type))
1739 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1740 else
1741 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1742
1743 ret = ops->vidioc_g_selection(file, fh, &s);
1744 if (ret)
1745 return ret;
1746 p->defrect = s.r;
1747
1748 /* setting trivial pixelaspect */
1749 p->pixelaspect.numerator = 1;
1750 p->pixelaspect.denominator = 1;
1751 return 0;
1752 }
1753
1754 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1755 struct file *file, void *fh, void *arg)
1756 {
1757 struct video_device *vfd = video_devdata(file);
1758 int ret;
1759
1760 if (vfd->v4l2_dev)
1761 pr_info("%s: ================= START STATUS =================\n",
1762 vfd->v4l2_dev->name);
1763 ret = ops->vidioc_log_status(file, fh);
1764 if (vfd->v4l2_dev)
1765 pr_info("%s: ================== END STATUS ==================\n",
1766 vfd->v4l2_dev->name);
1767 return ret;
1768 }
1769
1770 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1771 struct file *file, void *fh, void *arg)
1772 {
1773 #ifdef CONFIG_VIDEO_ADV_DEBUG
1774 struct v4l2_dbg_register *p = arg;
1775
1776 if (!capable(CAP_SYS_ADMIN))
1777 return -EPERM;
1778 return ops->vidioc_g_register(file, fh, p);
1779 #else
1780 return -ENOTTY;
1781 #endif
1782 }
1783
1784 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1785 struct file *file, void *fh, void *arg)
1786 {
1787 #ifdef CONFIG_VIDEO_ADV_DEBUG
1788 struct v4l2_dbg_register *p = arg;
1789
1790 if (!capable(CAP_SYS_ADMIN))
1791 return -EPERM;
1792 return ops->vidioc_s_register(file, fh, p);
1793 #else
1794 return -ENOTTY;
1795 #endif
1796 }
1797
1798 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1799 struct file *file, void *fh, void *arg)
1800 {
1801 struct v4l2_dbg_chip_ident *p = arg;
1802
1803 p->ident = V4L2_IDENT_NONE;
1804 p->revision = 0;
1805 return ops->vidioc_g_chip_ident(file, fh, p);
1806 }
1807
1808 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1809 struct file *file, void *fh, void *arg)
1810 {
1811 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1812 }
1813
1814 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1815 struct file *file, void *fh, void *arg)
1816 {
1817 return ops->vidioc_subscribe_event(fh, arg);
1818 }
1819
1820 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1821 struct file *file, void *fh, void *arg)
1822 {
1823 return ops->vidioc_unsubscribe_event(fh, arg);
1824 }
1825
1826 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1827 struct file *file, void *fh, void *arg)
1828 {
1829 struct v4l2_sliced_vbi_cap *p = arg;
1830
1831 /* Clear up to type, everything after type is zeroed already */
1832 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1833
1834 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1835 }
1836
1837 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1838 struct file *file, void *fh, void *arg)
1839 {
1840 struct video_device *vfd = video_devdata(file);
1841 struct v4l2_frequency_band *p = arg;
1842 enum v4l2_tuner_type type;
1843 int err;
1844
1845 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1846 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1847
1848 if (type != p->type)
1849 return -EINVAL;
1850 if (ops->vidioc_enum_freq_bands)
1851 return ops->vidioc_enum_freq_bands(file, fh, p);
1852 if (ops->vidioc_g_tuner) {
1853 struct v4l2_tuner t = {
1854 .index = p->tuner,
1855 .type = type,
1856 };
1857
1858 if (p->index)
1859 return -EINVAL;
1860 err = ops->vidioc_g_tuner(file, fh, &t);
1861 if (err)
1862 return err;
1863 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1864 p->rangelow = t.rangelow;
1865 p->rangehigh = t.rangehigh;
1866 p->modulation = (type == V4L2_TUNER_RADIO) ?
1867 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1868 return 0;
1869 }
1870 if (ops->vidioc_g_modulator) {
1871 struct v4l2_modulator m = {
1872 .index = p->tuner,
1873 };
1874
1875 if (type != V4L2_TUNER_RADIO)
1876 return -EINVAL;
1877 if (p->index)
1878 return -EINVAL;
1879 err = ops->vidioc_g_modulator(file, fh, &m);
1880 if (err)
1881 return err;
1882 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1883 p->rangelow = m.rangelow;
1884 p->rangehigh = m.rangehigh;
1885 p->modulation = (type == V4L2_TUNER_RADIO) ?
1886 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1887 return 0;
1888 }
1889 return -ENOTTY;
1890 }
1891
1892 struct v4l2_ioctl_info {
1893 unsigned int ioctl;
1894 u32 flags;
1895 const char * const name;
1896 union {
1897 u32 offset;
1898 int (*func)(const struct v4l2_ioctl_ops *ops,
1899 struct file *file, void *fh, void *p);
1900 } u;
1901 void (*debug)(const void *arg, bool write_only);
1902 };
1903
1904 /* This control needs a priority check */
1905 #define INFO_FL_PRIO (1 << 0)
1906 /* This control can be valid if the filehandle passes a control handler. */
1907 #define INFO_FL_CTRL (1 << 1)
1908 /* This is a standard ioctl, no need for special code */
1909 #define INFO_FL_STD (1 << 2)
1910 /* This is ioctl has its own function */
1911 #define INFO_FL_FUNC (1 << 3)
1912 /* Queuing ioctl */
1913 #define INFO_FL_QUEUE (1 << 4)
1914 /* Zero struct from after the field to the end */
1915 #define INFO_FL_CLEAR(v4l2_struct, field) \
1916 ((offsetof(struct v4l2_struct, field) + \
1917 sizeof(((struct v4l2_struct *)0)->field)) << 16)
1918 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1919
1920 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
1921 [_IOC_NR(_ioctl)] = { \
1922 .ioctl = _ioctl, \
1923 .flags = _flags | INFO_FL_STD, \
1924 .name = #_ioctl, \
1925 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
1926 .debug = _debug, \
1927 }
1928
1929 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
1930 [_IOC_NR(_ioctl)] = { \
1931 .ioctl = _ioctl, \
1932 .flags = _flags | INFO_FL_FUNC, \
1933 .name = #_ioctl, \
1934 .u.func = _func, \
1935 .debug = _debug, \
1936 }
1937
1938 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1939 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1940 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1941 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1942 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1943 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1944 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1945 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1946 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1947 IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO),
1948 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1949 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1950 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1951 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1952 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1953 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1954 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1955 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1956 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1957 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1958 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1959 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1960 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1961 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1962 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1963 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1964 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1965 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1966 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
1967 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
1968 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
1969 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
1970 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
1971 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
1972 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
1973 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
1974 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
1975 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
1976 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
1977 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
1978 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
1979 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
1980 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
1981 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
1982 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
1983 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
1984 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
1985 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
1986 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
1987 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
1988 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
1989 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
1990 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)),
1991 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
1992 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
1993 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
1994 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
1995 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
1996 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
1997 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
1998 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1999 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2000 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2001 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2002 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2003 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2004 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2005 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2006 IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
2007 IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
2008 IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
2009 IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
2010 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2011 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2012 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2013 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2014 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2015 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2016 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2017 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2018 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2019 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2020 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2021 };
2022 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2023
2024 bool v4l2_is_known_ioctl(unsigned int cmd)
2025 {
2026 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2027 return false;
2028 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2029 }
2030
2031 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2032 {
2033 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2034 return vdev->lock;
2035 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2036 return NULL;
2037 if (vdev->queue && vdev->queue->lock &&
2038 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2039 return vdev->queue->lock;
2040 return vdev->lock;
2041 }
2042
2043 /* Common ioctl debug function. This function can be used by
2044 external ioctl messages as well as internal V4L ioctl */
2045 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2046 {
2047 const char *dir, *type;
2048
2049 if (prefix)
2050 printk(KERN_DEBUG "%s: ", prefix);
2051
2052 switch (_IOC_TYPE(cmd)) {
2053 case 'd':
2054 type = "v4l2_int";
2055 break;
2056 case 'V':
2057 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2058 type = "v4l2";
2059 break;
2060 }
2061 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2062 return;
2063 default:
2064 type = "unknown";
2065 break;
2066 }
2067
2068 switch (_IOC_DIR(cmd)) {
2069 case _IOC_NONE: dir = "--"; break;
2070 case _IOC_READ: dir = "r-"; break;
2071 case _IOC_WRITE: dir = "-w"; break;
2072 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2073 default: dir = "*ERR*"; break;
2074 }
2075 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2076 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2077 }
2078 EXPORT_SYMBOL(v4l_printk_ioctl);
2079
2080 static long __video_do_ioctl(struct file *file,
2081 unsigned int cmd, void *arg)
2082 {
2083 struct video_device *vfd = video_devdata(file);
2084 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2085 bool write_only = false;
2086 struct v4l2_ioctl_info default_info;
2087 const struct v4l2_ioctl_info *info;
2088 void *fh = file->private_data;
2089 struct v4l2_fh *vfh = NULL;
2090 int use_fh_prio = 0;
2091 int debug = vfd->debug;
2092 long ret = -ENOTTY;
2093
2094 if (ops == NULL) {
2095 pr_warn("%s: has no ioctl_ops.\n",
2096 video_device_node_name(vfd));
2097 return ret;
2098 }
2099
2100 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2101 vfh = file->private_data;
2102 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2103 }
2104
2105 if (v4l2_is_known_ioctl(cmd)) {
2106 info = &v4l2_ioctls[_IOC_NR(cmd)];
2107
2108 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2109 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2110 goto done;
2111
2112 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2113 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2114 if (ret)
2115 goto done;
2116 }
2117 } else {
2118 default_info.ioctl = cmd;
2119 default_info.flags = 0;
2120 default_info.debug = v4l_print_default;
2121 info = &default_info;
2122 }
2123
2124 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2125 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2126 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2127 pr_cont(": ");
2128 info->debug(arg, write_only);
2129 }
2130 if (info->flags & INFO_FL_STD) {
2131 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2132 const void *p = vfd->ioctl_ops;
2133 const vidioc_op *vidioc = p + info->u.offset;
2134
2135 ret = (*vidioc)(file, fh, arg);
2136 } else if (info->flags & INFO_FL_FUNC) {
2137 ret = info->u.func(ops, file, fh, arg);
2138 } else if (!ops->vidioc_default) {
2139 ret = -ENOTTY;
2140 } else {
2141 ret = ops->vidioc_default(file, fh,
2142 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2143 cmd, arg);
2144 }
2145
2146 done:
2147 if (debug) {
2148 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2149 if (ret < 0)
2150 printk(KERN_DEBUG "%s: error %ld\n",
2151 video_device_node_name(vfd), ret);
2152 return ret;
2153 }
2154 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2155 if (ret < 0)
2156 pr_cont(": error %ld\n", ret);
2157 else if (debug == V4L2_DEBUG_IOCTL)
2158 pr_cont("\n");
2159 else if (_IOC_DIR(cmd) == _IOC_NONE)
2160 info->debug(arg, write_only);
2161 else {
2162 pr_cont(": ");
2163 info->debug(arg, write_only);
2164 }
2165 }
2166
2167 return ret;
2168 }
2169
2170 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2171 void * __user *user_ptr, void ***kernel_ptr)
2172 {
2173 int ret = 0;
2174
2175 switch (cmd) {
2176 case VIDIOC_QUERYBUF:
2177 case VIDIOC_QBUF:
2178 case VIDIOC_DQBUF: {
2179 struct v4l2_buffer *buf = parg;
2180
2181 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2182 if (buf->length > VIDEO_MAX_PLANES) {
2183 ret = -EINVAL;
2184 break;
2185 }
2186 *user_ptr = (void __user *)buf->m.planes;
2187 *kernel_ptr = (void *)&buf->m.planes;
2188 *array_size = sizeof(struct v4l2_plane) * buf->length;
2189 ret = 1;
2190 }
2191 break;
2192 }
2193
2194 case VIDIOC_S_EXT_CTRLS:
2195 case VIDIOC_G_EXT_CTRLS:
2196 case VIDIOC_TRY_EXT_CTRLS: {
2197 struct v4l2_ext_controls *ctrls = parg;
2198
2199 if (ctrls->count != 0) {
2200 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2201 ret = -EINVAL;
2202 break;
2203 }
2204 *user_ptr = (void __user *)ctrls->controls;
2205 *kernel_ptr = (void *)&ctrls->controls;
2206 *array_size = sizeof(struct v4l2_ext_control)
2207 * ctrls->count;
2208 ret = 1;
2209 }
2210 break;
2211 }
2212 }
2213
2214 return ret;
2215 }
2216
2217 long
2218 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2219 v4l2_kioctl func)
2220 {
2221 char sbuf[128];
2222 void *mbuf = NULL;
2223 void *parg = (void *)arg;
2224 long err = -EINVAL;
2225 bool has_array_args;
2226 size_t array_size = 0;
2227 void __user *user_ptr = NULL;
2228 void **kernel_ptr = NULL;
2229
2230 /* Copy arguments into temp kernel buffer */
2231 if (_IOC_DIR(cmd) != _IOC_NONE) {
2232 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2233 parg = sbuf;
2234 } else {
2235 /* too big to allocate from stack */
2236 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2237 if (NULL == mbuf)
2238 return -ENOMEM;
2239 parg = mbuf;
2240 }
2241
2242 err = -EFAULT;
2243 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2244 unsigned int n = _IOC_SIZE(cmd);
2245
2246 /*
2247 * In some cases, only a few fields are used as input,
2248 * i.e. when the app sets "index" and then the driver
2249 * fills in the rest of the structure for the thing
2250 * with that index. We only need to copy up the first
2251 * non-input field.
2252 */
2253 if (v4l2_is_known_ioctl(cmd)) {
2254 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2255 if (flags & INFO_FL_CLEAR_MASK)
2256 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2257 }
2258
2259 if (copy_from_user(parg, (void __user *)arg, n))
2260 goto out;
2261
2262 /* zero out anything we don't copy from userspace */
2263 if (n < _IOC_SIZE(cmd))
2264 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2265 } else {
2266 /* read-only ioctl */
2267 memset(parg, 0, _IOC_SIZE(cmd));
2268 }
2269 }
2270
2271 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2272 if (err < 0)
2273 goto out;
2274 has_array_args = err;
2275
2276 if (has_array_args) {
2277 /*
2278 * When adding new types of array args, make sure that the
2279 * parent argument to ioctl (which contains the pointer to the
2280 * array) fits into sbuf (so that mbuf will still remain
2281 * unused up to here).
2282 */
2283 mbuf = kmalloc(array_size, GFP_KERNEL);
2284 err = -ENOMEM;
2285 if (NULL == mbuf)
2286 goto out_array_args;
2287 err = -EFAULT;
2288 if (copy_from_user(mbuf, user_ptr, array_size))
2289 goto out_array_args;
2290 *kernel_ptr = mbuf;
2291 }
2292
2293 /* Handles IOCTL */
2294 err = func(file, cmd, parg);
2295 if (err == -ENOIOCTLCMD)
2296 err = -ENOTTY;
2297
2298 if (has_array_args) {
2299 *kernel_ptr = user_ptr;
2300 if (copy_to_user(user_ptr, mbuf, array_size))
2301 err = -EFAULT;
2302 goto out_array_args;
2303 }
2304 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2305 results that must be returned. */
2306 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2307 goto out;
2308
2309 out_array_args:
2310 /* Copy results into user buffer */
2311 switch (_IOC_DIR(cmd)) {
2312 case _IOC_READ:
2313 case (_IOC_WRITE | _IOC_READ):
2314 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2315 err = -EFAULT;
2316 break;
2317 }
2318
2319 out:
2320 kfree(mbuf);
2321 return err;
2322 }
2323 EXPORT_SYMBOL(video_usercopy);
2324
2325 long video_ioctl2(struct file *file,
2326 unsigned int cmd, unsigned long arg)
2327 {
2328 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2329 }
2330 EXPORT_SYMBOL(video_ioctl2);
Linux ARM platform port for MOXA ART SoC