2 * Video capture interface for Linux version 2
4 * A generic framework to process V4L2 ioctl commands.
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.
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
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>
21 #include <linux/videodev2.h>
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>
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))
38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
45 static 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" },
79 /* video4linux standard ID conversion to standard name
81 const char *v4l2_norm_to_name(v4l2_std_id id)
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.
92 for (i = 0; standards[i].std; i++)
93 if (myid == standards[i].std)
95 return standards[i].descr;
97 EXPORT_SYMBOL(v4l2_norm_to_name);
99 /* Returns frame period for the given standard */
100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
102 if (id & V4L2_STD_525_60) {
103 frameperiod->numerator = 1001;
104 frameperiod->denominator = 30000;
106 frameperiod->numerator = 1;
107 frameperiod->denominator = 25;
110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
112 /* Fill in the fields of a v4l2_standard structure according to the
113 'id' and 'transmission' parameters. Returns negative on error. */
114 int v4l2_video_std_construct(struct v4l2_standard *vs,
115 int id, const char *name)
118 v4l2_video_std_frame_period(id, &vs->frameperiod);
119 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
120 strlcpy(vs->name, name, sizeof(vs->name));
123 EXPORT_SYMBOL(v4l2_video_std_construct);
125 /* ----------------------------------------------------------------- */
126 /* some arrays for pretty-printing debug messages of enum types */
128 const 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",
140 EXPORT_SYMBOL(v4l2_field_names);
142 const 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",
151 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
154 EXPORT_SYMBOL(v4l2_type_names);
156 static const char *v4l2_memory_names[] = {
157 [V4L2_MEMORY_MMAP] = "mmap",
158 [V4L2_MEMORY_USERPTR] = "userptr",
159 [V4L2_MEMORY_OVERLAY] = "overlay",
160 [V4L2_MEMORY_DMABUF] = "dmabuf",
163 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
165 /* ------------------------------------------------------------------ */
166 /* debug help functions */
168 static void v4l_print_querycap(const void *arg, bool write_only)
170 const struct v4l2_capability *p = arg;
172 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
173 "capabilities=0x%08x, device_caps=0x%08x\n",
174 (int)sizeof(p->driver), p->driver,
175 (int)sizeof(p->card), p->card,
176 (int)sizeof(p->bus_info), p->bus_info,
177 p->version, p->capabilities, p->device_caps);
180 static void v4l_print_enuminput(const void *arg, bool write_only)
182 const struct v4l2_input *p = arg;
184 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
185 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
186 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
187 p->tuner, (unsigned long long)p->std, p->status,
191 static void v4l_print_enumoutput(const void *arg, bool write_only)
193 const struct v4l2_output *p = arg;
195 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
196 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
197 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
198 p->modulator, (unsigned long long)p->std, p->capabilities);
201 static void v4l_print_audio(const void *arg, bool write_only)
203 const struct v4l2_audio *p = arg;
206 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
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);
213 static void v4l_print_audioout(const void *arg, bool write_only)
215 const struct v4l2_audioout *p = arg;
218 pr_cont("index=%u\n", p->index);
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);
225 static void v4l_print_fmtdesc(const void *arg, bool write_only)
227 const struct v4l2_fmtdesc *p = arg;
229 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
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,
235 (int)sizeof(p->description), p->description);
238 static void v4l_print_format(const void *arg, bool write_only)
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;
246 const struct v4l2_clip *clip;
249 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
251 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
252 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
254 pr_cont(", width=%u, height=%u, "
255 "pixelformat=%c%c%c%c, field=%s, "
256 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
257 pix->width, pix->height,
258 (pix->pixelformat & 0xff),
259 (pix->pixelformat >> 8) & 0xff,
260 (pix->pixelformat >> 16) & 0xff,
261 (pix->pixelformat >> 24) & 0xff,
262 prt_names(pix->field, v4l2_field_names),
263 pix->bytesperline, pix->sizeimage,
266 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
267 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
269 pr_cont(", width=%u, height=%u, "
270 "format=%c%c%c%c, field=%s, "
271 "colorspace=%d, num_planes=%u\n",
272 mp->width, mp->height,
273 (mp->pixelformat & 0xff),
274 (mp->pixelformat >> 8) & 0xff,
275 (mp->pixelformat >> 16) & 0xff,
276 (mp->pixelformat >> 24) & 0xff,
277 prt_names(mp->field, v4l2_field_names),
278 mp->colorspace, mp->num_planes);
279 for (i = 0; i < mp->num_planes; i++)
280 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
281 mp->plane_fmt[i].bytesperline,
282 mp->plane_fmt[i].sizeimage);
284 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
285 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
287 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
288 "chromakey=0x%08x, bitmap=%p, "
289 "global_alpha=0x%02x\n",
290 win->w.width, win->w.height,
291 win->w.left, win->w.top,
292 prt_names(win->field, v4l2_field_names),
293 win->chromakey, win->bitmap, win->global_alpha);
295 for (i = 0; i < win->clipcount; i++) {
296 printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
297 i, clip->c.width, clip->c.height,
298 clip->c.left, clip->c.top);
302 case V4L2_BUF_TYPE_VBI_CAPTURE:
303 case V4L2_BUF_TYPE_VBI_OUTPUT:
305 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
306 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
307 vbi->sampling_rate, vbi->offset,
308 vbi->samples_per_line,
309 (vbi->sample_format & 0xff),
310 (vbi->sample_format >> 8) & 0xff,
311 (vbi->sample_format >> 16) & 0xff,
312 (vbi->sample_format >> 24) & 0xff,
313 vbi->start[0], vbi->start[1],
314 vbi->count[0], vbi->count[1]);
316 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
317 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
318 sliced = &p->fmt.sliced;
319 pr_cont(", service_set=0x%08x, io_size=%d\n",
320 sliced->service_set, sliced->io_size);
321 for (i = 0; i < 24; i++)
322 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
323 sliced->service_lines[0][i],
324 sliced->service_lines[1][i]);
329 static void v4l_print_framebuffer(const void *arg, bool write_only)
331 const struct v4l2_framebuffer *p = arg;
333 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
334 "height=%u, pixelformat=%c%c%c%c, "
335 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
336 p->capability, p->flags, p->base,
337 p->fmt.width, p->fmt.height,
338 (p->fmt.pixelformat & 0xff),
339 (p->fmt.pixelformat >> 8) & 0xff,
340 (p->fmt.pixelformat >> 16) & 0xff,
341 (p->fmt.pixelformat >> 24) & 0xff,
342 p->fmt.bytesperline, p->fmt.sizeimage,
346 static void v4l_print_buftype(const void *arg, bool write_only)
348 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
351 static void v4l_print_modulator(const void *arg, bool write_only)
353 const struct v4l2_modulator *p = arg;
356 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
358 pr_cont("index=%u, name=%.*s, capability=0x%x, "
359 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
360 p->index, (int)sizeof(p->name), p->name, p->capability,
361 p->rangelow, p->rangehigh, p->txsubchans);
364 static void v4l_print_tuner(const void *arg, bool write_only)
366 const struct v4l2_tuner *p = arg;
369 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
371 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
372 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
373 "rxsubchans=0x%x, audmode=%u\n",
374 p->index, (int)sizeof(p->name), p->name, p->type,
375 p->capability, p->rangelow,
376 p->rangehigh, p->signal, p->afc,
377 p->rxsubchans, p->audmode);
380 static void v4l_print_frequency(const void *arg, bool write_only)
382 const struct v4l2_frequency *p = arg;
384 pr_cont("tuner=%u, type=%u, frequency=%u\n",
385 p->tuner, p->type, p->frequency);
388 static void v4l_print_standard(const void *arg, bool write_only)
390 const struct v4l2_standard *p = arg;
392 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
393 "framelines=%u\n", p->index,
394 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
395 p->frameperiod.numerator,
396 p->frameperiod.denominator,
400 static void v4l_print_std(const void *arg, bool write_only)
402 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
405 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
407 const struct v4l2_hw_freq_seek *p = arg;
409 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
410 "rangelow=%u, rangehigh=%u\n",
411 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
412 p->rangelow, p->rangehigh);
415 static void v4l_print_requestbuffers(const void *arg, bool write_only)
417 const struct v4l2_requestbuffers *p = arg;
419 pr_cont("count=%d, type=%s, memory=%s\n",
421 prt_names(p->type, v4l2_type_names),
422 prt_names(p->memory, v4l2_memory_names));
425 static void v4l_print_buffer(const void *arg, bool write_only)
427 const struct v4l2_buffer *p = arg;
428 const struct v4l2_timecode *tc = &p->timecode;
429 const struct v4l2_plane *plane;
432 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
433 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
434 p->timestamp.tv_sec / 3600,
435 (int)(p->timestamp.tv_sec / 60) % 60,
436 (int)(p->timestamp.tv_sec % 60),
437 (long)p->timestamp.tv_usec,
439 prt_names(p->type, v4l2_type_names),
440 p->flags, prt_names(p->field, v4l2_field_names),
441 p->sequence, prt_names(p->memory, v4l2_memory_names));
443 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
445 for (i = 0; i < p->length; ++i) {
446 plane = &p->m.planes[i];
448 "plane %d: bytesused=%d, data_offset=0x%08x "
449 "offset/userptr=0x%lx, length=%d\n",
450 i, plane->bytesused, plane->data_offset,
451 plane->m.userptr, plane->length);
454 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
455 p->bytesused, p->m.userptr, p->length);
458 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
459 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
460 tc->hours, tc->minutes, tc->seconds,
461 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
464 static void v4l_print_exportbuffer(const void *arg, bool write_only)
466 const struct v4l2_exportbuffer *p = arg;
468 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
469 p->fd, prt_names(p->type, v4l2_type_names),
470 p->index, p->plane, p->flags);
473 static void v4l_print_create_buffers(const void *arg, bool write_only)
475 const struct v4l2_create_buffers *p = arg;
477 pr_cont("index=%d, count=%d, memory=%s, ",
479 prt_names(p->memory, v4l2_memory_names));
480 v4l_print_format(&p->format, write_only);
483 static void v4l_print_streamparm(const void *arg, bool write_only)
485 const struct v4l2_streamparm *p = arg;
487 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
489 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
490 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
491 const struct v4l2_captureparm *c = &p->parm.capture;
493 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
494 "extendedmode=%d, readbuffers=%d\n",
495 c->capability, c->capturemode,
496 c->timeperframe.numerator, c->timeperframe.denominator,
497 c->extendedmode, c->readbuffers);
498 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
499 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
500 const struct v4l2_outputparm *c = &p->parm.output;
502 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
503 "extendedmode=%d, writebuffers=%d\n",
504 c->capability, c->outputmode,
505 c->timeperframe.numerator, c->timeperframe.denominator,
506 c->extendedmode, c->writebuffers);
510 static void v4l_print_queryctrl(const void *arg, bool write_only)
512 const struct v4l2_queryctrl *p = arg;
514 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
515 "step=%d, default=%d, flags=0x%08x\n",
516 p->id, p->type, (int)sizeof(p->name), p->name,
517 p->minimum, p->maximum,
518 p->step, p->default_value, p->flags);
521 static void v4l_print_querymenu(const void *arg, bool write_only)
523 const struct v4l2_querymenu *p = arg;
525 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
528 static void v4l_print_control(const void *arg, bool write_only)
530 const struct v4l2_control *p = arg;
532 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
535 static void v4l_print_ext_controls(const void *arg, bool write_only)
537 const struct v4l2_ext_controls *p = arg;
540 pr_cont("class=0x%x, count=%d, error_idx=%d",
541 p->ctrl_class, p->count, p->error_idx);
542 for (i = 0; i < p->count; i++) {
543 if (p->controls[i].size)
544 pr_cont(", id/val=0x%x/0x%x",
545 p->controls[i].id, p->controls[i].value);
547 pr_cont(", id/size=0x%x/%u",
548 p->controls[i].id, p->controls[i].size);
553 static void v4l_print_cropcap(const void *arg, bool write_only)
555 const struct v4l2_cropcap *p = arg;
557 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
558 "defrect wxh=%dx%d, x,y=%d,%d\n, "
559 "pixelaspect %d/%d\n",
560 prt_names(p->type, v4l2_type_names),
561 p->bounds.width, p->bounds.height,
562 p->bounds.left, p->bounds.top,
563 p->defrect.width, p->defrect.height,
564 p->defrect.left, p->defrect.top,
565 p->pixelaspect.numerator, p->pixelaspect.denominator);
568 static void v4l_print_crop(const void *arg, bool write_only)
570 const struct v4l2_crop *p = arg;
572 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
573 prt_names(p->type, v4l2_type_names),
574 p->c.width, p->c.height,
575 p->c.left, p->c.top);
578 static void v4l_print_selection(const void *arg, bool write_only)
580 const struct v4l2_selection *p = arg;
582 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
583 prt_names(p->type, v4l2_type_names),
585 p->r.width, p->r.height, p->r.left, p->r.top);
588 static void v4l_print_jpegcompression(const void *arg, bool write_only)
590 const struct v4l2_jpegcompression *p = arg;
592 pr_cont("quality=%d, APPn=%d, APP_len=%d, "
593 "COM_len=%d, jpeg_markers=0x%x\n",
594 p->quality, p->APPn, p->APP_len,
595 p->COM_len, p->jpeg_markers);
598 static void v4l_print_enc_idx(const void *arg, bool write_only)
600 const struct v4l2_enc_idx *p = arg;
602 pr_cont("entries=%d, entries_cap=%d\n",
603 p->entries, p->entries_cap);
606 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
608 const struct v4l2_encoder_cmd *p = arg;
610 pr_cont("cmd=%d, flags=0x%x\n",
614 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
616 const struct v4l2_decoder_cmd *p = arg;
618 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
620 if (p->cmd == V4L2_DEC_CMD_START)
621 pr_info("speed=%d, format=%u\n",
622 p->start.speed, p->start.format);
623 else if (p->cmd == V4L2_DEC_CMD_STOP)
624 pr_info("pts=%llu\n", p->stop.pts);
627 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
629 const struct v4l2_dbg_chip_ident *p = arg;
631 pr_cont("type=%u, ", p->match.type);
632 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
633 pr_cont("name=%.*s, ",
634 (int)sizeof(p->match.name), p->match.name);
636 pr_cont("addr=%u, ", p->match.addr);
637 pr_cont("chip_ident=%u, revision=0x%x\n",
638 p->ident, p->revision);
641 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
643 const struct v4l2_dbg_chip_info *p = arg;
645 pr_cont("type=%u, ", p->match.type);
646 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
647 pr_cont("name=%.*s, ",
648 (int)sizeof(p->match.name), p->match.name);
650 pr_cont("addr=%u, ", p->match.addr);
651 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
654 static void v4l_print_dbg_register(const void *arg, bool write_only)
656 const struct v4l2_dbg_register *p = arg;
658 pr_cont("type=%u, ", p->match.type);
659 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
660 pr_cont("name=%.*s, ",
661 (int)sizeof(p->match.name), p->match.name);
663 pr_cont("addr=%u, ", p->match.addr);
664 pr_cont("reg=0x%llx, val=0x%llx\n",
668 static void v4l_print_dv_timings(const void *arg, bool write_only)
670 const struct v4l2_dv_timings *p = arg;
673 case V4L2_DV_BT_656_1120:
674 pr_cont("type=bt-656/1120, interlaced=%u, "
676 "width=%u, height=%u, polarities=0x%x, "
677 "hfrontporch=%u, hsync=%u, "
678 "hbackporch=%u, vfrontporch=%u, "
679 "vsync=%u, vbackporch=%u, "
680 "il_vfrontporch=%u, il_vsync=%u, "
681 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
682 p->bt.interlaced, p->bt.pixelclock,
683 p->bt.width, p->bt.height,
684 p->bt.polarities, p->bt.hfrontporch,
685 p->bt.hsync, p->bt.hbackporch,
686 p->bt.vfrontporch, p->bt.vsync,
687 p->bt.vbackporch, p->bt.il_vfrontporch,
688 p->bt.il_vsync, p->bt.il_vbackporch,
689 p->bt.standards, p->bt.flags);
692 pr_cont("type=%d\n", p->type);
697 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
699 const struct v4l2_enum_dv_timings *p = arg;
701 pr_cont("index=%u, ", p->index);
702 v4l_print_dv_timings(&p->timings, write_only);
705 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
707 const struct v4l2_dv_timings_cap *p = arg;
710 case V4L2_DV_BT_656_1120:
711 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
712 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
713 p->bt.min_width, p->bt.max_width,
714 p->bt.min_height, p->bt.max_height,
715 p->bt.min_pixelclock, p->bt.max_pixelclock,
716 p->bt.standards, p->bt.capabilities);
719 pr_cont("type=%u\n", p->type);
724 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
726 const struct v4l2_frmsizeenum *p = arg;
728 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
730 (p->pixel_format & 0xff),
731 (p->pixel_format >> 8) & 0xff,
732 (p->pixel_format >> 16) & 0xff,
733 (p->pixel_format >> 24) & 0xff,
736 case V4L2_FRMSIZE_TYPE_DISCRETE:
737 pr_cont(" wxh=%ux%u\n",
738 p->discrete.width, p->discrete.height);
740 case V4L2_FRMSIZE_TYPE_STEPWISE:
741 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
742 p->stepwise.min_width, p->stepwise.min_height,
743 p->stepwise.step_width, p->stepwise.step_height,
744 p->stepwise.max_width, p->stepwise.max_height);
746 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
754 static void v4l_print_frmivalenum(const void *arg, bool write_only)
756 const struct v4l2_frmivalenum *p = arg;
758 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
760 (p->pixel_format & 0xff),
761 (p->pixel_format >> 8) & 0xff,
762 (p->pixel_format >> 16) & 0xff,
763 (p->pixel_format >> 24) & 0xff,
764 p->width, p->height, p->type);
766 case V4L2_FRMIVAL_TYPE_DISCRETE:
767 pr_cont(" fps=%d/%d\n",
768 p->discrete.numerator,
769 p->discrete.denominator);
771 case V4L2_FRMIVAL_TYPE_STEPWISE:
772 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
773 p->stepwise.min.numerator,
774 p->stepwise.min.denominator,
775 p->stepwise.max.numerator,
776 p->stepwise.max.denominator,
777 p->stepwise.step.numerator,
778 p->stepwise.step.denominator);
780 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
788 static void v4l_print_event(const void *arg, bool write_only)
790 const struct v4l2_event *p = arg;
791 const struct v4l2_event_ctrl *c;
793 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
794 "timestamp=%lu.%9.9lu\n",
795 p->type, p->pending, p->sequence, p->id,
796 p->timestamp.tv_sec, p->timestamp.tv_nsec);
798 case V4L2_EVENT_VSYNC:
799 printk(KERN_DEBUG "field=%s\n",
800 prt_names(p->u.vsync.field, v4l2_field_names));
802 case V4L2_EVENT_CTRL:
804 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
805 c->changes, c->type);
806 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
807 pr_cont("value64=%lld, ", c->value64);
809 pr_cont("value=%d, ", c->value);
810 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
811 " default_value=%d\n",
812 c->flags, c->minimum, c->maximum,
813 c->step, c->default_value);
815 case V4L2_EVENT_FRAME_SYNC:
816 pr_cont("frame_sequence=%u\n",
817 p->u.frame_sync.frame_sequence);
822 static void v4l_print_event_subscription(const void *arg, bool write_only)
824 const struct v4l2_event_subscription *p = arg;
826 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
827 p->type, p->id, p->flags);
830 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
832 const struct v4l2_sliced_vbi_cap *p = arg;
835 pr_cont("type=%s, service_set=0x%08x\n",
836 prt_names(p->type, v4l2_type_names), p->service_set);
837 for (i = 0; i < 24; i++)
838 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
839 p->service_lines[0][i],
840 p->service_lines[1][i]);
843 static void v4l_print_freq_band(const void *arg, bool write_only)
845 const struct v4l2_frequency_band *p = arg;
847 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
848 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
849 p->tuner, p->type, p->index,
850 p->capability, p->rangelow,
851 p->rangehigh, p->modulation);
854 static void v4l_print_u32(const void *arg, bool write_only)
856 pr_cont("value=%u\n", *(const u32 *)arg);
859 static void v4l_print_newline(const void *arg, bool write_only)
864 static void v4l_print_default(const void *arg, bool write_only)
866 pr_cont("driver-specific ioctl\n");
869 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
873 /* zero the reserved fields */
874 c->reserved[0] = c->reserved[1] = 0;
875 for (i = 0; i < c->count; i++)
876 c->controls[i].reserved2[0] = 0;
878 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
879 when using extended controls.
880 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
881 is it allowed for backwards compatibility.
883 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
885 /* Check that all controls are from the same control class. */
886 for (i = 0; i < c->count; i++) {
887 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
895 static int check_fmt(struct file *file, enum v4l2_buf_type type)
897 struct video_device *vfd = video_devdata(file);
898 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
899 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
900 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
901 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
902 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
908 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
909 if (is_vid && is_rx &&
910 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
913 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
914 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
917 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
918 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
921 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
922 if (is_vid && is_tx &&
923 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
926 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
927 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
930 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
931 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
934 case V4L2_BUF_TYPE_VBI_CAPTURE:
935 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
938 case V4L2_BUF_TYPE_VBI_OUTPUT:
939 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
942 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
943 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
946 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
947 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
956 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
957 struct file *file, void *fh, void *arg)
959 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
961 cap->version = LINUX_VERSION_CODE;
962 return ops->vidioc_querycap(file, fh, cap);
965 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
966 struct file *file, void *fh, void *arg)
968 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
971 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
972 struct file *file, void *fh, void *arg)
974 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
977 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
978 struct file *file, void *fh, void *arg)
980 struct video_device *vfd;
983 if (ops->vidioc_g_priority)
984 return ops->vidioc_g_priority(file, fh, arg);
985 vfd = video_devdata(file);
986 *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
990 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
991 struct file *file, void *fh, void *arg)
993 struct video_device *vfd;
997 if (ops->vidioc_s_priority)
998 return ops->vidioc_s_priority(file, fh, *p);
999 vfd = video_devdata(file);
1000 vfh = file->private_data;
1001 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1004 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1005 struct file *file, void *fh, void *arg)
1007 struct video_device *vfd = video_devdata(file);
1008 struct v4l2_input *p = arg;
1011 * We set the flags for CAP_DV_TIMINGS &
1012 * CAP_STD here based on ioctl handler provided by the
1013 * driver. If the driver doesn't support these
1014 * for a specific input, it must override these flags.
1016 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1017 p->capabilities |= V4L2_IN_CAP_STD;
1019 return ops->vidioc_enum_input(file, fh, p);
1022 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1023 struct file *file, void *fh, void *arg)
1025 struct video_device *vfd = video_devdata(file);
1026 struct v4l2_output *p = arg;
1029 * We set the flags for CAP_DV_TIMINGS &
1030 * CAP_STD here based on ioctl handler provided by the
1031 * driver. If the driver doesn't support these
1032 * for a specific output, it must override these flags.
1034 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1035 p->capabilities |= V4L2_OUT_CAP_STD;
1037 return ops->vidioc_enum_output(file, fh, p);
1040 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1041 struct file *file, void *fh, void *arg)
1043 struct v4l2_fmtdesc *p = arg;
1044 struct video_device *vfd = video_devdata(file);
1045 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1046 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1049 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1050 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1052 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1053 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1054 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1056 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1057 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1058 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1060 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1061 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1062 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1064 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1065 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1066 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1068 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1073 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1074 struct file *file, void *fh, void *arg)
1076 struct v4l2_format *p = arg;
1077 struct video_device *vfd = video_devdata(file);
1078 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1079 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1080 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1083 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1084 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1086 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1087 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1088 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1090 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1091 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1092 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1094 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1095 case V4L2_BUF_TYPE_VBI_CAPTURE:
1096 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1098 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1099 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1100 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1102 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1103 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1104 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1106 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1107 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1108 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1110 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1111 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1112 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1114 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1115 case V4L2_BUF_TYPE_VBI_OUTPUT:
1116 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1118 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1119 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1120 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1122 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1127 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1128 struct file *file, void *fh, void *arg)
1130 struct v4l2_format *p = arg;
1131 struct video_device *vfd = video_devdata(file);
1132 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1133 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1134 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1137 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1138 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1140 CLEAR_AFTER_FIELD(p, fmt.pix);
1141 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1142 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1143 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1145 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1146 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1147 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1148 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1150 CLEAR_AFTER_FIELD(p, fmt.win);
1151 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1152 case V4L2_BUF_TYPE_VBI_CAPTURE:
1153 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1155 CLEAR_AFTER_FIELD(p, fmt.vbi);
1156 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1157 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1158 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1160 CLEAR_AFTER_FIELD(p, fmt.sliced);
1161 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1162 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1163 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1165 CLEAR_AFTER_FIELD(p, fmt.pix);
1166 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1167 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1168 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1170 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1171 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1172 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1173 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1175 CLEAR_AFTER_FIELD(p, fmt.win);
1176 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1177 case V4L2_BUF_TYPE_VBI_OUTPUT:
1178 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1180 CLEAR_AFTER_FIELD(p, fmt.vbi);
1181 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1182 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1183 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1185 CLEAR_AFTER_FIELD(p, fmt.sliced);
1186 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1191 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1192 struct file *file, void *fh, void *arg)
1194 struct v4l2_format *p = arg;
1195 struct video_device *vfd = video_devdata(file);
1196 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1197 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1198 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1201 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1202 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1204 CLEAR_AFTER_FIELD(p, fmt.pix);
1205 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1206 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1207 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1209 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1210 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1211 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1212 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1214 CLEAR_AFTER_FIELD(p, fmt.win);
1215 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1216 case V4L2_BUF_TYPE_VBI_CAPTURE:
1217 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1219 CLEAR_AFTER_FIELD(p, fmt.vbi);
1220 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1221 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1222 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1224 CLEAR_AFTER_FIELD(p, fmt.sliced);
1225 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1226 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1227 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1229 CLEAR_AFTER_FIELD(p, fmt.pix);
1230 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1231 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1232 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1234 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1235 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1236 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1237 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1239 CLEAR_AFTER_FIELD(p, fmt.win);
1240 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1241 case V4L2_BUF_TYPE_VBI_OUTPUT:
1242 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1244 CLEAR_AFTER_FIELD(p, fmt.vbi);
1245 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1246 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1247 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1249 CLEAR_AFTER_FIELD(p, fmt.sliced);
1250 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1255 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1256 struct file *file, void *fh, void *arg)
1258 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1261 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1262 struct file *file, void *fh, void *arg)
1264 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1267 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1268 struct file *file, void *fh, void *arg)
1270 struct video_device *vfd = video_devdata(file);
1271 struct v4l2_tuner *p = arg;
1274 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1275 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1276 err = ops->vidioc_g_tuner(file, fh, p);
1278 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1282 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1283 struct file *file, void *fh, void *arg)
1285 struct video_device *vfd = video_devdata(file);
1286 struct v4l2_tuner *p = arg;
1288 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1289 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1290 return ops->vidioc_s_tuner(file, fh, p);
1293 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1294 struct file *file, void *fh, void *arg)
1296 struct v4l2_modulator *p = arg;
1299 err = ops->vidioc_g_modulator(file, fh, p);
1301 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1305 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1306 struct file *file, void *fh, void *arg)
1308 struct video_device *vfd = video_devdata(file);
1309 struct v4l2_frequency *p = arg;
1311 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1312 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1313 return ops->vidioc_g_frequency(file, fh, p);
1316 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1317 struct file *file, void *fh, void *arg)
1319 struct video_device *vfd = video_devdata(file);
1320 const struct v4l2_frequency *p = arg;
1321 enum v4l2_tuner_type type;
1323 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1324 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1325 if (p->type != type)
1327 return ops->vidioc_s_frequency(file, fh, p);
1330 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1331 struct file *file, void *fh, void *arg)
1333 struct video_device *vfd = video_devdata(file);
1334 struct v4l2_standard *p = arg;
1335 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1336 unsigned int index = p->index, i, j = 0;
1337 const char *descr = "";
1339 /* Return -ENODATA if the tvnorms for the current input
1340 or output is 0, meaning that it doesn't support this API. */
1344 /* Return norm array in a canonical way */
1345 for (i = 0; i <= index && id; i++) {
1346 /* last std value in the standards array is 0, so this
1347 while always ends there since (id & 0) == 0. */
1348 while ((id & standards[j].std) != standards[j].std)
1350 curr_id = standards[j].std;
1351 descr = standards[j].descr;
1355 if (curr_id != V4L2_STD_PAL &&
1356 curr_id != V4L2_STD_SECAM &&
1357 curr_id != V4L2_STD_NTSC)
1363 v4l2_video_std_construct(p, curr_id, descr);
1367 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1368 struct file *file, void *fh, void *arg)
1370 struct video_device *vfd = video_devdata(file);
1371 v4l2_std_id *id = arg;
1373 /* Calls the specific handler */
1374 if (ops->vidioc_g_std)
1375 return ops->vidioc_g_std(file, fh, arg);
1376 if (vfd->current_norm) {
1377 *id = vfd->current_norm;
1383 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1384 struct file *file, void *fh, void *arg)
1386 struct video_device *vfd = video_devdata(file);
1387 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1390 norm = id & vfd->tvnorms;
1391 if (vfd->tvnorms && !norm) /* Check if std is supported */
1394 /* Calls the specific handler */
1395 ret = ops->vidioc_s_std(file, fh, norm);
1397 /* Updates standard information */
1399 vfd->current_norm = norm;
1403 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1404 struct file *file, void *fh, void *arg)
1406 struct video_device *vfd = video_devdata(file);
1407 v4l2_std_id *p = arg;
1410 * If nothing detected, it should return all supported
1412 * Drivers just need to mask the std argument, in order
1413 * to remove the standards that don't apply from the mask.
1414 * This means that tuners, audio and video decoders can join
1415 * their efforts to improve the standards detection.
1418 return ops->vidioc_querystd(file, fh, arg);
1421 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1422 struct file *file, void *fh, void *arg)
1424 struct video_device *vfd = video_devdata(file);
1425 struct v4l2_hw_freq_seek *p = arg;
1426 enum v4l2_tuner_type type;
1428 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1429 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1430 if (p->type != type)
1432 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1435 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1436 struct file *file, void *fh, void *arg)
1438 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1441 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1442 struct file *file, void *fh, void *arg)
1444 struct v4l2_requestbuffers *p = arg;
1445 int ret = check_fmt(file, p->type);
1450 CLEAR_AFTER_FIELD(p, memory);
1452 return ops->vidioc_reqbufs(file, fh, p);
1455 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1456 struct file *file, void *fh, void *arg)
1458 struct v4l2_buffer *p = arg;
1459 int ret = check_fmt(file, p->type);
1461 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1464 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1465 struct file *file, void *fh, void *arg)
1467 struct v4l2_buffer *p = arg;
1468 int ret = check_fmt(file, p->type);
1470 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1473 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1474 struct file *file, void *fh, void *arg)
1476 struct v4l2_buffer *p = arg;
1477 int ret = check_fmt(file, p->type);
1479 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1482 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1483 struct file *file, void *fh, void *arg)
1485 struct v4l2_create_buffers *create = arg;
1486 int ret = check_fmt(file, create->format.type);
1488 return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1491 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1492 struct file *file, void *fh, void *arg)
1494 struct v4l2_buffer *b = arg;
1495 int ret = check_fmt(file, b->type);
1497 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1500 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1501 struct file *file, void *fh, void *arg)
1503 struct video_device *vfd = video_devdata(file);
1504 struct v4l2_streamparm *p = arg;
1506 int ret = check_fmt(file, p->type);
1510 if (ops->vidioc_g_parm)
1511 return ops->vidioc_g_parm(file, fh, p);
1512 std = vfd->current_norm;
1513 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1514 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1516 p->parm.capture.readbuffers = 2;
1517 if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std)
1518 ret = ops->vidioc_g_std(file, fh, &std);
1520 v4l2_video_std_frame_period(std,
1521 &p->parm.capture.timeperframe);
1525 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1526 struct file *file, void *fh, void *arg)
1528 struct v4l2_streamparm *p = arg;
1529 int ret = check_fmt(file, p->type);
1531 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1534 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1535 struct file *file, void *fh, void *arg)
1537 struct video_device *vfd = video_devdata(file);
1538 struct v4l2_queryctrl *p = arg;
1539 struct v4l2_fh *vfh =
1540 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1542 if (vfh && vfh->ctrl_handler)
1543 return v4l2_queryctrl(vfh->ctrl_handler, p);
1544 if (vfd->ctrl_handler)
1545 return v4l2_queryctrl(vfd->ctrl_handler, p);
1546 if (ops->vidioc_queryctrl)
1547 return ops->vidioc_queryctrl(file, fh, p);
1551 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1552 struct file *file, void *fh, void *arg)
1554 struct video_device *vfd = video_devdata(file);
1555 struct v4l2_querymenu *p = arg;
1556 struct v4l2_fh *vfh =
1557 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1559 if (vfh && vfh->ctrl_handler)
1560 return v4l2_querymenu(vfh->ctrl_handler, p);
1561 if (vfd->ctrl_handler)
1562 return v4l2_querymenu(vfd->ctrl_handler, p);
1563 if (ops->vidioc_querymenu)
1564 return ops->vidioc_querymenu(file, fh, p);
1568 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1569 struct file *file, void *fh, void *arg)
1571 struct video_device *vfd = video_devdata(file);
1572 struct v4l2_control *p = arg;
1573 struct v4l2_fh *vfh =
1574 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1575 struct v4l2_ext_controls ctrls;
1576 struct v4l2_ext_control ctrl;
1578 if (vfh && vfh->ctrl_handler)
1579 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1580 if (vfd->ctrl_handler)
1581 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1582 if (ops->vidioc_g_ctrl)
1583 return ops->vidioc_g_ctrl(file, fh, p);
1584 if (ops->vidioc_g_ext_ctrls == NULL)
1587 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1589 ctrls.controls = &ctrl;
1591 ctrl.value = p->value;
1592 if (check_ext_ctrls(&ctrls, 1)) {
1593 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1596 p->value = ctrl.value;
1602 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1603 struct file *file, void *fh, void *arg)
1605 struct video_device *vfd = video_devdata(file);
1606 struct v4l2_control *p = arg;
1607 struct v4l2_fh *vfh =
1608 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1609 struct v4l2_ext_controls ctrls;
1610 struct v4l2_ext_control ctrl;
1612 if (vfh && vfh->ctrl_handler)
1613 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1614 if (vfd->ctrl_handler)
1615 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1616 if (ops->vidioc_s_ctrl)
1617 return ops->vidioc_s_ctrl(file, fh, p);
1618 if (ops->vidioc_s_ext_ctrls == NULL)
1621 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1623 ctrls.controls = &ctrl;
1625 ctrl.value = p->value;
1626 if (check_ext_ctrls(&ctrls, 1))
1627 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1631 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1632 struct file *file, void *fh, void *arg)
1634 struct video_device *vfd = video_devdata(file);
1635 struct v4l2_ext_controls *p = arg;
1636 struct v4l2_fh *vfh =
1637 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1639 p->error_idx = p->count;
1640 if (vfh && vfh->ctrl_handler)
1641 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1642 if (vfd->ctrl_handler)
1643 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1644 if (ops->vidioc_g_ext_ctrls == NULL)
1646 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1650 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1651 struct file *file, void *fh, void *arg)
1653 struct video_device *vfd = video_devdata(file);
1654 struct v4l2_ext_controls *p = arg;
1655 struct v4l2_fh *vfh =
1656 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1658 p->error_idx = p->count;
1659 if (vfh && vfh->ctrl_handler)
1660 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1661 if (vfd->ctrl_handler)
1662 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1663 if (ops->vidioc_s_ext_ctrls == NULL)
1665 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1669 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1670 struct file *file, void *fh, void *arg)
1672 struct video_device *vfd = video_devdata(file);
1673 struct v4l2_ext_controls *p = arg;
1674 struct v4l2_fh *vfh =
1675 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1677 p->error_idx = p->count;
1678 if (vfh && vfh->ctrl_handler)
1679 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1680 if (vfd->ctrl_handler)
1681 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1682 if (ops->vidioc_try_ext_ctrls == NULL)
1684 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1688 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1689 struct file *file, void *fh, void *arg)
1691 struct v4l2_crop *p = arg;
1692 struct v4l2_selection s = {
1697 if (ops->vidioc_g_crop)
1698 return ops->vidioc_g_crop(file, fh, p);
1699 /* simulate capture crop using selection api */
1701 /* crop means compose for output devices */
1702 if (V4L2_TYPE_IS_OUTPUT(p->type))
1703 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1705 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1707 ret = ops->vidioc_g_selection(file, fh, &s);
1709 /* copying results to old structure on success */
1715 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1716 struct file *file, void *fh, void *arg)
1718 struct v4l2_crop *p = arg;
1719 struct v4l2_selection s = {
1724 if (ops->vidioc_s_crop)
1725 return ops->vidioc_s_crop(file, fh, p);
1726 /* simulate capture crop using selection api */
1728 /* crop means compose for output devices */
1729 if (V4L2_TYPE_IS_OUTPUT(p->type))
1730 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1732 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1734 return ops->vidioc_s_selection(file, fh, &s);
1737 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1738 struct file *file, void *fh, void *arg)
1740 struct v4l2_cropcap *p = arg;
1741 struct v4l2_selection s = { .type = p->type };
1744 if (ops->vidioc_cropcap)
1745 return ops->vidioc_cropcap(file, fh, p);
1747 /* obtaining bounds */
1748 if (V4L2_TYPE_IS_OUTPUT(p->type))
1749 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1751 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1753 ret = ops->vidioc_g_selection(file, fh, &s);
1758 /* obtaining defrect */
1759 if (V4L2_TYPE_IS_OUTPUT(p->type))
1760 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1762 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1764 ret = ops->vidioc_g_selection(file, fh, &s);
1769 /* setting trivial pixelaspect */
1770 p->pixelaspect.numerator = 1;
1771 p->pixelaspect.denominator = 1;
1775 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1776 struct file *file, void *fh, void *arg)
1778 struct video_device *vfd = video_devdata(file);
1782 pr_info("%s: ================= START STATUS =================\n",
1783 vfd->v4l2_dev->name);
1784 ret = ops->vidioc_log_status(file, fh);
1786 pr_info("%s: ================== END STATUS ==================\n",
1787 vfd->v4l2_dev->name);
1791 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1792 struct file *file, void *fh, void *arg)
1794 #ifdef CONFIG_VIDEO_ADV_DEBUG
1795 struct v4l2_dbg_register *p = arg;
1796 struct video_device *vfd = video_devdata(file);
1797 struct v4l2_subdev *sd;
1800 if (!capable(CAP_SYS_ADMIN))
1802 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1803 if (vfd->v4l2_dev == NULL)
1805 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1806 if (p->match.addr == idx++)
1807 return v4l2_subdev_call(sd, core, g_register, p);
1810 if (ops->vidioc_g_register)
1811 return ops->vidioc_g_register(file, fh, p);
1818 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1819 struct file *file, void *fh, void *arg)
1821 #ifdef CONFIG_VIDEO_ADV_DEBUG
1822 const struct v4l2_dbg_register *p = arg;
1823 struct video_device *vfd = video_devdata(file);
1824 struct v4l2_subdev *sd;
1827 if (!capable(CAP_SYS_ADMIN))
1829 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1830 if (vfd->v4l2_dev == NULL)
1832 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1833 if (p->match.addr == idx++)
1834 return v4l2_subdev_call(sd, core, s_register, p);
1837 if (ops->vidioc_s_register)
1838 return ops->vidioc_s_register(file, fh, p);
1845 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1846 struct file *file, void *fh, void *arg)
1848 struct v4l2_dbg_chip_ident *p = arg;
1850 p->ident = V4L2_IDENT_NONE;
1852 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV)
1854 return ops->vidioc_g_chip_ident(file, fh, p);
1857 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1858 struct file *file, void *fh, void *arg)
1860 #ifdef CONFIG_VIDEO_ADV_DEBUG
1861 struct video_device *vfd = video_devdata(file);
1862 struct v4l2_dbg_chip_info *p = arg;
1863 struct v4l2_subdev *sd;
1866 switch (p->match.type) {
1867 case V4L2_CHIP_MATCH_BRIDGE:
1868 if (ops->vidioc_s_register)
1869 p->flags |= V4L2_CHIP_FL_WRITABLE;
1870 if (ops->vidioc_g_register)
1871 p->flags |= V4L2_CHIP_FL_READABLE;
1873 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1874 else if (vfd->parent)
1875 strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name));
1877 strlcpy(p->name, "bridge", sizeof(p->name));
1878 if (ops->vidioc_g_chip_info)
1879 return ops->vidioc_g_chip_info(file, fh, arg);
1884 case V4L2_CHIP_MATCH_SUBDEV:
1885 if (vfd->v4l2_dev == NULL)
1887 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1888 if (p->match.addr != idx++)
1890 if (sd->ops->core && sd->ops->core->s_register)
1891 p->flags |= V4L2_CHIP_FL_WRITABLE;
1892 if (sd->ops->core && sd->ops->core->g_register)
1893 p->flags |= V4L2_CHIP_FL_READABLE;
1894 strlcpy(p->name, sd->name, sizeof(p->name));
1905 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1906 struct file *file, void *fh, void *arg)
1908 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1911 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1912 struct file *file, void *fh, void *arg)
1914 return ops->vidioc_subscribe_event(fh, arg);
1917 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1918 struct file *file, void *fh, void *arg)
1920 return ops->vidioc_unsubscribe_event(fh, arg);
1923 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1924 struct file *file, void *fh, void *arg)
1926 struct v4l2_sliced_vbi_cap *p = arg;
1927 int ret = check_fmt(file, p->type);
1932 /* Clear up to type, everything after type is zeroed already */
1933 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1935 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1938 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1939 struct file *file, void *fh, void *arg)
1941 struct video_device *vfd = video_devdata(file);
1942 struct v4l2_frequency_band *p = arg;
1943 enum v4l2_tuner_type type;
1946 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1947 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1949 if (type != p->type)
1951 if (ops->vidioc_enum_freq_bands)
1952 return ops->vidioc_enum_freq_bands(file, fh, p);
1953 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1954 struct v4l2_tuner t = {
1961 err = ops->vidioc_g_tuner(file, fh, &t);
1964 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1965 p->rangelow = t.rangelow;
1966 p->rangehigh = t.rangehigh;
1967 p->modulation = (type == V4L2_TUNER_RADIO) ?
1968 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1971 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1972 struct v4l2_modulator m = {
1976 if (type != V4L2_TUNER_RADIO)
1980 err = ops->vidioc_g_modulator(file, fh, &m);
1983 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1984 p->rangelow = m.rangelow;
1985 p->rangehigh = m.rangehigh;
1986 p->modulation = (type == V4L2_TUNER_RADIO) ?
1987 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1993 struct v4l2_ioctl_info {
1996 const char * const name;
1999 int (*func)(const struct v4l2_ioctl_ops *ops,
2000 struct file *file, void *fh, void *p);
2002 void (*debug)(const void *arg, bool write_only);
2005 /* This control needs a priority check */
2006 #define INFO_FL_PRIO (1 << 0)
2007 /* This control can be valid if the filehandle passes a control handler. */
2008 #define INFO_FL_CTRL (1 << 1)
2009 /* This is a standard ioctl, no need for special code */
2010 #define INFO_FL_STD (1 << 2)
2011 /* This is ioctl has its own function */
2012 #define INFO_FL_FUNC (1 << 3)
2014 #define INFO_FL_QUEUE (1 << 4)
2015 /* Zero struct from after the field to the end */
2016 #define INFO_FL_CLEAR(v4l2_struct, field) \
2017 ((offsetof(struct v4l2_struct, field) + \
2018 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2019 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2021 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
2022 [_IOC_NR(_ioctl)] = { \
2024 .flags = _flags | INFO_FL_STD, \
2026 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
2030 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
2031 [_IOC_NR(_ioctl)] = { \
2033 .flags = _flags | INFO_FL_FUNC, \
2039 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2040 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2041 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2042 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2043 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2044 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2045 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2046 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2047 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2048 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2049 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2050 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2051 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2052 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2053 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2054 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2055 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2056 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
2057 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2058 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2059 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2060 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2061 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2062 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2063 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2064 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2065 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2066 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2067 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2068 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2069 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2070 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2071 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2072 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2073 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2074 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2075 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2076 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2077 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2078 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2079 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2080 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2081 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2082 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2083 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2084 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2085 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2086 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2087 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2088 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2089 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2090 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2091 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2092 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)),
2093 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2094 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2095 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2096 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2097 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2098 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2099 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2100 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2101 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2102 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2103 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2104 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2105 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2106 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2107 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2108 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2109 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2110 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2111 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2112 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2113 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2114 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2115 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2116 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2117 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2118 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2119 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)),
2121 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2123 bool v4l2_is_known_ioctl(unsigned int cmd)
2125 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2127 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2130 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2132 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2134 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2136 if (vdev->queue && vdev->queue->lock &&
2137 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2138 return vdev->queue->lock;
2142 /* Common ioctl debug function. This function can be used by
2143 external ioctl messages as well as internal V4L ioctl */
2144 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2146 const char *dir, *type;
2149 printk(KERN_DEBUG "%s: ", prefix);
2151 switch (_IOC_TYPE(cmd)) {
2156 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2160 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2167 switch (_IOC_DIR(cmd)) {
2168 case _IOC_NONE: dir = "--"; break;
2169 case _IOC_READ: dir = "r-"; break;
2170 case _IOC_WRITE: dir = "-w"; break;
2171 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2172 default: dir = "*ERR*"; break;
2174 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2175 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2177 EXPORT_SYMBOL(v4l_printk_ioctl);
2179 static long __video_do_ioctl(struct file *file,
2180 unsigned int cmd, void *arg)
2182 struct video_device *vfd = video_devdata(file);
2183 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2184 bool write_only = false;
2185 struct v4l2_ioctl_info default_info;
2186 const struct v4l2_ioctl_info *info;
2187 void *fh = file->private_data;
2188 struct v4l2_fh *vfh = NULL;
2189 int use_fh_prio = 0;
2190 int debug = vfd->debug;
2194 pr_warn("%s: has no ioctl_ops.\n",
2195 video_device_node_name(vfd));
2199 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2200 vfh = file->private_data;
2201 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2204 if (v4l2_is_known_ioctl(cmd)) {
2205 info = &v4l2_ioctls[_IOC_NR(cmd)];
2207 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2208 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2211 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2212 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2217 default_info.ioctl = cmd;
2218 default_info.flags = 0;
2219 default_info.debug = v4l_print_default;
2220 info = &default_info;
2223 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2224 if (info->flags & INFO_FL_STD) {
2225 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2226 const void *p = vfd->ioctl_ops;
2227 const vidioc_op *vidioc = p + info->u.offset;
2229 ret = (*vidioc)(file, fh, arg);
2230 } else if (info->flags & INFO_FL_FUNC) {
2231 ret = info->u.func(ops, file, fh, arg);
2232 } else if (!ops->vidioc_default) {
2235 ret = ops->vidioc_default(file, fh,
2236 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2242 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2244 pr_cont(": error %ld", ret);
2245 if (debug == V4L2_DEBUG_IOCTL)
2247 else if (_IOC_DIR(cmd) == _IOC_NONE)
2248 info->debug(arg, write_only);
2251 info->debug(arg, write_only);
2258 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2259 void * __user *user_ptr, void ***kernel_ptr)
2264 case VIDIOC_PREPARE_BUF:
2265 case VIDIOC_QUERYBUF:
2267 case VIDIOC_DQBUF: {
2268 struct v4l2_buffer *buf = parg;
2270 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2271 if (buf->length > VIDEO_MAX_PLANES) {
2275 *user_ptr = (void __user *)buf->m.planes;
2276 *kernel_ptr = (void *)&buf->m.planes;
2277 *array_size = sizeof(struct v4l2_plane) * buf->length;
2283 case VIDIOC_SUBDEV_G_EDID:
2284 case VIDIOC_SUBDEV_S_EDID: {
2285 struct v4l2_subdev_edid *edid = parg;
2288 if (edid->blocks > 256) {
2292 *user_ptr = (void __user *)edid->edid;
2293 *kernel_ptr = (void *)&edid->edid;
2294 *array_size = edid->blocks * 128;
2300 case VIDIOC_S_EXT_CTRLS:
2301 case VIDIOC_G_EXT_CTRLS:
2302 case VIDIOC_TRY_EXT_CTRLS: {
2303 struct v4l2_ext_controls *ctrls = parg;
2305 if (ctrls->count != 0) {
2306 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2310 *user_ptr = (void __user *)ctrls->controls;
2311 *kernel_ptr = (void *)&ctrls->controls;
2312 *array_size = sizeof(struct v4l2_ext_control)
2324 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2329 void *parg = (void *)arg;
2331 bool has_array_args;
2332 size_t array_size = 0;
2333 void __user *user_ptr = NULL;
2334 void **kernel_ptr = NULL;
2336 /* Copy arguments into temp kernel buffer */
2337 if (_IOC_DIR(cmd) != _IOC_NONE) {
2338 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2341 /* too big to allocate from stack */
2342 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2349 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2350 unsigned int n = _IOC_SIZE(cmd);
2353 * In some cases, only a few fields are used as input,
2354 * i.e. when the app sets "index" and then the driver
2355 * fills in the rest of the structure for the thing
2356 * with that index. We only need to copy up the first
2359 if (v4l2_is_known_ioctl(cmd)) {
2360 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2361 if (flags & INFO_FL_CLEAR_MASK)
2362 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2365 if (copy_from_user(parg, (void __user *)arg, n))
2368 /* zero out anything we don't copy from userspace */
2369 if (n < _IOC_SIZE(cmd))
2370 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2372 /* read-only ioctl */
2373 memset(parg, 0, _IOC_SIZE(cmd));
2377 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2380 has_array_args = err;
2382 if (has_array_args) {
2384 * When adding new types of array args, make sure that the
2385 * parent argument to ioctl (which contains the pointer to the
2386 * array) fits into sbuf (so that mbuf will still remain
2387 * unused up to here).
2389 mbuf = kmalloc(array_size, GFP_KERNEL);
2392 goto out_array_args;
2394 if (copy_from_user(mbuf, user_ptr, array_size))
2395 goto out_array_args;
2400 err = func(file, cmd, parg);
2401 if (err == -ENOIOCTLCMD)
2404 if (has_array_args) {
2405 *kernel_ptr = user_ptr;
2406 if (copy_to_user(user_ptr, mbuf, array_size))
2408 goto out_array_args;
2410 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2411 results that must be returned. */
2412 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2416 /* Copy results into user buffer */
2417 switch (_IOC_DIR(cmd)) {
2419 case (_IOC_WRITE | _IOC_READ):
2420 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2429 EXPORT_SYMBOL(video_usercopy);
2431 long video_ioctl2(struct file *file,
2432 unsigned int cmd, unsigned long arg)
2434 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2436 EXPORT_SYMBOL(video_ioctl2);