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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[deliverable/linux.git] / drivers / media / v4l2-core / v4l2-ioctl.c
1 /*
2 * Video capture interface for Linux version 2
3 *
4 * A generic framework to process V4L2 ioctl commands.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13 */
14
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/types.h>
18 #include <linux/kernel.h>
19 #include <linux/version.h>
20
21 #include <linux/videodev2.h>
22
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/v4l2-ctrls.h>
26 #include <media/v4l2-fh.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-device.h>
29 #include <media/videobuf2-core.h>
30
31 #define CREATE_TRACE_POINTS
32 #include <trace/events/v4l2.h>
33
34 /* Zero out the end of the struct pointed to by p. Everything after, but
35 * not including, the specified field is cleared. */
36 #define CLEAR_AFTER_FIELD(p, field) \
37 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
38 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
39
40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
41
42 struct std_descr {
43 v4l2_std_id std;
44 const char *descr;
45 };
46
47 static const struct std_descr standards[] = {
48 { V4L2_STD_NTSC, "NTSC" },
49 { V4L2_STD_NTSC_M, "NTSC-M" },
50 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
51 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
52 { V4L2_STD_NTSC_443, "NTSC-443" },
53 { V4L2_STD_PAL, "PAL" },
54 { V4L2_STD_PAL_BG, "PAL-BG" },
55 { V4L2_STD_PAL_B, "PAL-B" },
56 { V4L2_STD_PAL_B1, "PAL-B1" },
57 { V4L2_STD_PAL_G, "PAL-G" },
58 { V4L2_STD_PAL_H, "PAL-H" },
59 { V4L2_STD_PAL_I, "PAL-I" },
60 { V4L2_STD_PAL_DK, "PAL-DK" },
61 { V4L2_STD_PAL_D, "PAL-D" },
62 { V4L2_STD_PAL_D1, "PAL-D1" },
63 { V4L2_STD_PAL_K, "PAL-K" },
64 { V4L2_STD_PAL_M, "PAL-M" },
65 { V4L2_STD_PAL_N, "PAL-N" },
66 { V4L2_STD_PAL_Nc, "PAL-Nc" },
67 { V4L2_STD_PAL_60, "PAL-60" },
68 { V4L2_STD_SECAM, "SECAM" },
69 { V4L2_STD_SECAM_B, "SECAM-B" },
70 { V4L2_STD_SECAM_G, "SECAM-G" },
71 { V4L2_STD_SECAM_H, "SECAM-H" },
72 { V4L2_STD_SECAM_DK, "SECAM-DK" },
73 { V4L2_STD_SECAM_D, "SECAM-D" },
74 { V4L2_STD_SECAM_K, "SECAM-K" },
75 { V4L2_STD_SECAM_K1, "SECAM-K1" },
76 { V4L2_STD_SECAM_L, "SECAM-L" },
77 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
78 { 0, "Unknown" }
79 };
80
81 /* video4linux standard ID conversion to standard name
82 */
83 const char *v4l2_norm_to_name(v4l2_std_id id)
84 {
85 u32 myid = id;
86 int i;
87
88 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
89 64 bit comparations. So, on that architecture, with some gcc
90 variants, compilation fails. Currently, the max value is 30bit wide.
91 */
92 BUG_ON(myid != id);
93
94 for (i = 0; standards[i].std; i++)
95 if (myid == standards[i].std)
96 break;
97 return standards[i].descr;
98 }
99 EXPORT_SYMBOL(v4l2_norm_to_name);
100
101 /* Returns frame period for the given standard */
102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
103 {
104 if (id & V4L2_STD_525_60) {
105 frameperiod->numerator = 1001;
106 frameperiod->denominator = 30000;
107 } else {
108 frameperiod->numerator = 1;
109 frameperiod->denominator = 25;
110 }
111 }
112 EXPORT_SYMBOL(v4l2_video_std_frame_period);
113
114 /* Fill in the fields of a v4l2_standard structure according to the
115 'id' and 'transmission' parameters. Returns negative on error. */
116 int v4l2_video_std_construct(struct v4l2_standard *vs,
117 int id, const char *name)
118 {
119 vs->id = id;
120 v4l2_video_std_frame_period(id, &vs->frameperiod);
121 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
122 strlcpy(vs->name, name, sizeof(vs->name));
123 return 0;
124 }
125 EXPORT_SYMBOL(v4l2_video_std_construct);
126
127 /* ----------------------------------------------------------------- */
128 /* some arrays for pretty-printing debug messages of enum types */
129
130 const char *v4l2_field_names[] = {
131 [V4L2_FIELD_ANY] = "any",
132 [V4L2_FIELD_NONE] = "none",
133 [V4L2_FIELD_TOP] = "top",
134 [V4L2_FIELD_BOTTOM] = "bottom",
135 [V4L2_FIELD_INTERLACED] = "interlaced",
136 [V4L2_FIELD_SEQ_TB] = "seq-tb",
137 [V4L2_FIELD_SEQ_BT] = "seq-bt",
138 [V4L2_FIELD_ALTERNATE] = "alternate",
139 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
140 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
141 };
142 EXPORT_SYMBOL(v4l2_field_names);
143
144 const char *v4l2_type_names[] = {
145 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
146 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
147 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
148 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
149 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
150 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
151 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
153 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
154 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
155 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
156 };
157 EXPORT_SYMBOL(v4l2_type_names);
158
159 static const char *v4l2_memory_names[] = {
160 [V4L2_MEMORY_MMAP] = "mmap",
161 [V4L2_MEMORY_USERPTR] = "userptr",
162 [V4L2_MEMORY_OVERLAY] = "overlay",
163 [V4L2_MEMORY_DMABUF] = "dmabuf",
164 };
165
166 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
167
168 /* ------------------------------------------------------------------ */
169 /* debug help functions */
170
171 static void v4l_print_querycap(const void *arg, bool write_only)
172 {
173 const struct v4l2_capability *p = arg;
174
175 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
176 "capabilities=0x%08x, device_caps=0x%08x\n",
177 (int)sizeof(p->driver), p->driver,
178 (int)sizeof(p->card), p->card,
179 (int)sizeof(p->bus_info), p->bus_info,
180 p->version, p->capabilities, p->device_caps);
181 }
182
183 static void v4l_print_enuminput(const void *arg, bool write_only)
184 {
185 const struct v4l2_input *p = arg;
186
187 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
188 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
189 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
190 p->tuner, (unsigned long long)p->std, p->status,
191 p->capabilities);
192 }
193
194 static void v4l_print_enumoutput(const void *arg, bool write_only)
195 {
196 const struct v4l2_output *p = arg;
197
198 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
199 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
200 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
201 p->modulator, (unsigned long long)p->std, p->capabilities);
202 }
203
204 static void v4l_print_audio(const void *arg, bool write_only)
205 {
206 const struct v4l2_audio *p = arg;
207
208 if (write_only)
209 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
210 else
211 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
212 p->index, (int)sizeof(p->name), p->name,
213 p->capability, p->mode);
214 }
215
216 static void v4l_print_audioout(const void *arg, bool write_only)
217 {
218 const struct v4l2_audioout *p = arg;
219
220 if (write_only)
221 pr_cont("index=%u\n", p->index);
222 else
223 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
224 p->index, (int)sizeof(p->name), p->name,
225 p->capability, p->mode);
226 }
227
228 static void v4l_print_fmtdesc(const void *arg, bool write_only)
229 {
230 const struct v4l2_fmtdesc *p = arg;
231
232 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
233 p->index, prt_names(p->type, v4l2_type_names),
234 p->flags, (p->pixelformat & 0xff),
235 (p->pixelformat >> 8) & 0xff,
236 (p->pixelformat >> 16) & 0xff,
237 (p->pixelformat >> 24) & 0xff,
238 (int)sizeof(p->description), p->description);
239 }
240
241 static void v4l_print_format(const void *arg, bool write_only)
242 {
243 const struct v4l2_format *p = arg;
244 const struct v4l2_pix_format *pix;
245 const struct v4l2_pix_format_mplane *mp;
246 const struct v4l2_vbi_format *vbi;
247 const struct v4l2_sliced_vbi_format *sliced;
248 const struct v4l2_window *win;
249 const struct v4l2_sdr_format *sdr;
250 unsigned i;
251
252 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
253 switch (p->type) {
254 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
255 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
256 pix = &p->fmt.pix;
257 pr_cont(", width=%u, height=%u, "
258 "pixelformat=%c%c%c%c, field=%s, "
259 "bytesperline=%u, sizeimage=%u, colorspace=%d, "
260 "flags=0x%x, ycbcr_enc=%u, quantization=%u\n",
261 pix->width, pix->height,
262 (pix->pixelformat & 0xff),
263 (pix->pixelformat >> 8) & 0xff,
264 (pix->pixelformat >> 16) & 0xff,
265 (pix->pixelformat >> 24) & 0xff,
266 prt_names(pix->field, v4l2_field_names),
267 pix->bytesperline, pix->sizeimage,
268 pix->colorspace, pix->flags, pix->ycbcr_enc,
269 pix->quantization);
270 break;
271 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
272 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
273 mp = &p->fmt.pix_mp;
274 pr_cont(", width=%u, height=%u, "
275 "format=%c%c%c%c, field=%s, "
276 "colorspace=%d, num_planes=%u, flags=0x%x, "
277 "ycbcr_enc=%u, quantization=%u\n",
278 mp->width, mp->height,
279 (mp->pixelformat & 0xff),
280 (mp->pixelformat >> 8) & 0xff,
281 (mp->pixelformat >> 16) & 0xff,
282 (mp->pixelformat >> 24) & 0xff,
283 prt_names(mp->field, v4l2_field_names),
284 mp->colorspace, mp->num_planes, mp->flags,
285 mp->ycbcr_enc, mp->quantization);
286 for (i = 0; i < mp->num_planes; i++)
287 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
288 mp->plane_fmt[i].bytesperline,
289 mp->plane_fmt[i].sizeimage);
290 break;
291 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
292 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
293 win = &p->fmt.win;
294 /* Note: we can't print the clip list here since the clips
295 * pointer is a userspace pointer, not a kernelspace
296 * pointer. */
297 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
298 win->w.width, win->w.height, win->w.left, win->w.top,
299 prt_names(win->field, v4l2_field_names),
300 win->chromakey, win->clipcount, win->clips,
301 win->bitmap, win->global_alpha);
302 break;
303 case V4L2_BUF_TYPE_VBI_CAPTURE:
304 case V4L2_BUF_TYPE_VBI_OUTPUT:
305 vbi = &p->fmt.vbi;
306 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
307 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
308 vbi->sampling_rate, vbi->offset,
309 vbi->samples_per_line,
310 (vbi->sample_format & 0xff),
311 (vbi->sample_format >> 8) & 0xff,
312 (vbi->sample_format >> 16) & 0xff,
313 (vbi->sample_format >> 24) & 0xff,
314 vbi->start[0], vbi->start[1],
315 vbi->count[0], vbi->count[1]);
316 break;
317 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
318 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
319 sliced = &p->fmt.sliced;
320 pr_cont(", service_set=0x%08x, io_size=%d\n",
321 sliced->service_set, sliced->io_size);
322 for (i = 0; i < 24; i++)
323 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
324 sliced->service_lines[0][i],
325 sliced->service_lines[1][i]);
326 break;
327 case V4L2_BUF_TYPE_SDR_CAPTURE:
328 sdr = &p->fmt.sdr;
329 pr_cont(", pixelformat=%c%c%c%c\n",
330 (sdr->pixelformat >> 0) & 0xff,
331 (sdr->pixelformat >> 8) & 0xff,
332 (sdr->pixelformat >> 16) & 0xff,
333 (sdr->pixelformat >> 24) & 0xff);
334 break;
335 }
336 }
337
338 static void v4l_print_framebuffer(const void *arg, bool write_only)
339 {
340 const struct v4l2_framebuffer *p = arg;
341
342 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
343 "height=%u, pixelformat=%c%c%c%c, "
344 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
345 p->capability, p->flags, p->base,
346 p->fmt.width, p->fmt.height,
347 (p->fmt.pixelformat & 0xff),
348 (p->fmt.pixelformat >> 8) & 0xff,
349 (p->fmt.pixelformat >> 16) & 0xff,
350 (p->fmt.pixelformat >> 24) & 0xff,
351 p->fmt.bytesperline, p->fmt.sizeimage,
352 p->fmt.colorspace);
353 }
354
355 static void v4l_print_buftype(const void *arg, bool write_only)
356 {
357 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
358 }
359
360 static void v4l_print_modulator(const void *arg, bool write_only)
361 {
362 const struct v4l2_modulator *p = arg;
363
364 if (write_only)
365 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
366 else
367 pr_cont("index=%u, name=%.*s, capability=0x%x, "
368 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
369 p->index, (int)sizeof(p->name), p->name, p->capability,
370 p->rangelow, p->rangehigh, p->txsubchans);
371 }
372
373 static void v4l_print_tuner(const void *arg, bool write_only)
374 {
375 const struct v4l2_tuner *p = arg;
376
377 if (write_only)
378 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
379 else
380 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
381 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
382 "rxsubchans=0x%x, audmode=%u\n",
383 p->index, (int)sizeof(p->name), p->name, p->type,
384 p->capability, p->rangelow,
385 p->rangehigh, p->signal, p->afc,
386 p->rxsubchans, p->audmode);
387 }
388
389 static void v4l_print_frequency(const void *arg, bool write_only)
390 {
391 const struct v4l2_frequency *p = arg;
392
393 pr_cont("tuner=%u, type=%u, frequency=%u\n",
394 p->tuner, p->type, p->frequency);
395 }
396
397 static void v4l_print_standard(const void *arg, bool write_only)
398 {
399 const struct v4l2_standard *p = arg;
400
401 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
402 "framelines=%u\n", p->index,
403 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
404 p->frameperiod.numerator,
405 p->frameperiod.denominator,
406 p->framelines);
407 }
408
409 static void v4l_print_std(const void *arg, bool write_only)
410 {
411 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
412 }
413
414 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
415 {
416 const struct v4l2_hw_freq_seek *p = arg;
417
418 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
419 "rangelow=%u, rangehigh=%u\n",
420 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
421 p->rangelow, p->rangehigh);
422 }
423
424 static void v4l_print_requestbuffers(const void *arg, bool write_only)
425 {
426 const struct v4l2_requestbuffers *p = arg;
427
428 pr_cont("count=%d, type=%s, memory=%s\n",
429 p->count,
430 prt_names(p->type, v4l2_type_names),
431 prt_names(p->memory, v4l2_memory_names));
432 }
433
434 static void v4l_print_buffer(const void *arg, bool write_only)
435 {
436 const struct v4l2_buffer *p = arg;
437 const struct v4l2_timecode *tc = &p->timecode;
438 const struct v4l2_plane *plane;
439 int i;
440
441 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
442 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
443 p->timestamp.tv_sec / 3600,
444 (int)(p->timestamp.tv_sec / 60) % 60,
445 (int)(p->timestamp.tv_sec % 60),
446 (long)p->timestamp.tv_usec,
447 p->index,
448 prt_names(p->type, v4l2_type_names),
449 p->flags, prt_names(p->field, v4l2_field_names),
450 p->sequence, prt_names(p->memory, v4l2_memory_names));
451
452 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
453 pr_cont("\n");
454 for (i = 0; i < p->length; ++i) {
455 plane = &p->m.planes[i];
456 printk(KERN_DEBUG
457 "plane %d: bytesused=%d, data_offset=0x%08x, "
458 "offset/userptr=0x%lx, length=%d\n",
459 i, plane->bytesused, plane->data_offset,
460 plane->m.userptr, plane->length);
461 }
462 } else {
463 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
464 p->bytesused, p->m.userptr, p->length);
465 }
466
467 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
468 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
469 tc->hours, tc->minutes, tc->seconds,
470 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
471 }
472
473 static void v4l_print_exportbuffer(const void *arg, bool write_only)
474 {
475 const struct v4l2_exportbuffer *p = arg;
476
477 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
478 p->fd, prt_names(p->type, v4l2_type_names),
479 p->index, p->plane, p->flags);
480 }
481
482 static void v4l_print_create_buffers(const void *arg, bool write_only)
483 {
484 const struct v4l2_create_buffers *p = arg;
485
486 pr_cont("index=%d, count=%d, memory=%s, ",
487 p->index, p->count,
488 prt_names(p->memory, v4l2_memory_names));
489 v4l_print_format(&p->format, write_only);
490 }
491
492 static void v4l_print_streamparm(const void *arg, bool write_only)
493 {
494 const struct v4l2_streamparm *p = arg;
495
496 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
497
498 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
499 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
500 const struct v4l2_captureparm *c = &p->parm.capture;
501
502 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
503 "extendedmode=%d, readbuffers=%d\n",
504 c->capability, c->capturemode,
505 c->timeperframe.numerator, c->timeperframe.denominator,
506 c->extendedmode, c->readbuffers);
507 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
508 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
509 const struct v4l2_outputparm *c = &p->parm.output;
510
511 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
512 "extendedmode=%d, writebuffers=%d\n",
513 c->capability, c->outputmode,
514 c->timeperframe.numerator, c->timeperframe.denominator,
515 c->extendedmode, c->writebuffers);
516 } else {
517 pr_cont("\n");
518 }
519 }
520
521 static void v4l_print_queryctrl(const void *arg, bool write_only)
522 {
523 const struct v4l2_queryctrl *p = arg;
524
525 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
526 "step=%d, default=%d, flags=0x%08x\n",
527 p->id, p->type, (int)sizeof(p->name), p->name,
528 p->minimum, p->maximum,
529 p->step, p->default_value, p->flags);
530 }
531
532 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
533 {
534 const struct v4l2_query_ext_ctrl *p = arg;
535
536 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
537 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
538 "nr_of_dims=%u, dims=%u,%u,%u,%u\n",
539 p->id, p->type, (int)sizeof(p->name), p->name,
540 p->minimum, p->maximum,
541 p->step, p->default_value, p->flags,
542 p->elem_size, p->elems, p->nr_of_dims,
543 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
544 }
545
546 static void v4l_print_querymenu(const void *arg, bool write_only)
547 {
548 const struct v4l2_querymenu *p = arg;
549
550 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
551 }
552
553 static void v4l_print_control(const void *arg, bool write_only)
554 {
555 const struct v4l2_control *p = arg;
556
557 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
558 }
559
560 static void v4l_print_ext_controls(const void *arg, bool write_only)
561 {
562 const struct v4l2_ext_controls *p = arg;
563 int i;
564
565 pr_cont("class=0x%x, count=%d, error_idx=%d",
566 p->ctrl_class, p->count, p->error_idx);
567 for (i = 0; i < p->count; i++) {
568 if (!p->controls[i].size)
569 pr_cont(", id/val=0x%x/0x%x",
570 p->controls[i].id, p->controls[i].value);
571 else
572 pr_cont(", id/size=0x%x/%u",
573 p->controls[i].id, p->controls[i].size);
574 }
575 pr_cont("\n");
576 }
577
578 static void v4l_print_cropcap(const void *arg, bool write_only)
579 {
580 const struct v4l2_cropcap *p = arg;
581
582 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
583 "defrect wxh=%dx%d, x,y=%d,%d, "
584 "pixelaspect %d/%d\n",
585 prt_names(p->type, v4l2_type_names),
586 p->bounds.width, p->bounds.height,
587 p->bounds.left, p->bounds.top,
588 p->defrect.width, p->defrect.height,
589 p->defrect.left, p->defrect.top,
590 p->pixelaspect.numerator, p->pixelaspect.denominator);
591 }
592
593 static void v4l_print_crop(const void *arg, bool write_only)
594 {
595 const struct v4l2_crop *p = arg;
596
597 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
598 prt_names(p->type, v4l2_type_names),
599 p->c.width, p->c.height,
600 p->c.left, p->c.top);
601 }
602
603 static void v4l_print_selection(const void *arg, bool write_only)
604 {
605 const struct v4l2_selection *p = arg;
606
607 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
608 prt_names(p->type, v4l2_type_names),
609 p->target, p->flags,
610 p->r.width, p->r.height, p->r.left, p->r.top);
611 }
612
613 static void v4l_print_jpegcompression(const void *arg, bool write_only)
614 {
615 const struct v4l2_jpegcompression *p = arg;
616
617 pr_cont("quality=%d, APPn=%d, APP_len=%d, "
618 "COM_len=%d, jpeg_markers=0x%x\n",
619 p->quality, p->APPn, p->APP_len,
620 p->COM_len, p->jpeg_markers);
621 }
622
623 static void v4l_print_enc_idx(const void *arg, bool write_only)
624 {
625 const struct v4l2_enc_idx *p = arg;
626
627 pr_cont("entries=%d, entries_cap=%d\n",
628 p->entries, p->entries_cap);
629 }
630
631 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
632 {
633 const struct v4l2_encoder_cmd *p = arg;
634
635 pr_cont("cmd=%d, flags=0x%x\n",
636 p->cmd, p->flags);
637 }
638
639 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
640 {
641 const struct v4l2_decoder_cmd *p = arg;
642
643 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
644
645 if (p->cmd == V4L2_DEC_CMD_START)
646 pr_info("speed=%d, format=%u\n",
647 p->start.speed, p->start.format);
648 else if (p->cmd == V4L2_DEC_CMD_STOP)
649 pr_info("pts=%llu\n", p->stop.pts);
650 }
651
652 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
653 {
654 const struct v4l2_dbg_chip_info *p = arg;
655
656 pr_cont("type=%u, ", p->match.type);
657 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
658 pr_cont("name=%.*s, ",
659 (int)sizeof(p->match.name), p->match.name);
660 else
661 pr_cont("addr=%u, ", p->match.addr);
662 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
663 }
664
665 static void v4l_print_dbg_register(const void *arg, bool write_only)
666 {
667 const struct v4l2_dbg_register *p = arg;
668
669 pr_cont("type=%u, ", p->match.type);
670 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
671 pr_cont("name=%.*s, ",
672 (int)sizeof(p->match.name), p->match.name);
673 else
674 pr_cont("addr=%u, ", p->match.addr);
675 pr_cont("reg=0x%llx, val=0x%llx\n",
676 p->reg, p->val);
677 }
678
679 static void v4l_print_dv_timings(const void *arg, bool write_only)
680 {
681 const struct v4l2_dv_timings *p = arg;
682
683 switch (p->type) {
684 case V4L2_DV_BT_656_1120:
685 pr_cont("type=bt-656/1120, interlaced=%u, "
686 "pixelclock=%llu, "
687 "width=%u, height=%u, polarities=0x%x, "
688 "hfrontporch=%u, hsync=%u, "
689 "hbackporch=%u, vfrontporch=%u, "
690 "vsync=%u, vbackporch=%u, "
691 "il_vfrontporch=%u, il_vsync=%u, "
692 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
693 p->bt.interlaced, p->bt.pixelclock,
694 p->bt.width, p->bt.height,
695 p->bt.polarities, p->bt.hfrontporch,
696 p->bt.hsync, p->bt.hbackporch,
697 p->bt.vfrontporch, p->bt.vsync,
698 p->bt.vbackporch, p->bt.il_vfrontporch,
699 p->bt.il_vsync, p->bt.il_vbackporch,
700 p->bt.standards, p->bt.flags);
701 break;
702 default:
703 pr_cont("type=%d\n", p->type);
704 break;
705 }
706 }
707
708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
709 {
710 const struct v4l2_enum_dv_timings *p = arg;
711
712 pr_cont("index=%u, ", p->index);
713 v4l_print_dv_timings(&p->timings, write_only);
714 }
715
716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
717 {
718 const struct v4l2_dv_timings_cap *p = arg;
719
720 switch (p->type) {
721 case V4L2_DV_BT_656_1120:
722 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
723 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
724 p->bt.min_width, p->bt.max_width,
725 p->bt.min_height, p->bt.max_height,
726 p->bt.min_pixelclock, p->bt.max_pixelclock,
727 p->bt.standards, p->bt.capabilities);
728 break;
729 default:
730 pr_cont("type=%u\n", p->type);
731 break;
732 }
733 }
734
735 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
736 {
737 const struct v4l2_frmsizeenum *p = arg;
738
739 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
740 p->index,
741 (p->pixel_format & 0xff),
742 (p->pixel_format >> 8) & 0xff,
743 (p->pixel_format >> 16) & 0xff,
744 (p->pixel_format >> 24) & 0xff,
745 p->type);
746 switch (p->type) {
747 case V4L2_FRMSIZE_TYPE_DISCRETE:
748 pr_cont(", wxh=%ux%u\n",
749 p->discrete.width, p->discrete.height);
750 break;
751 case V4L2_FRMSIZE_TYPE_STEPWISE:
752 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
753 p->stepwise.min_width, p->stepwise.min_height,
754 p->stepwise.step_width, p->stepwise.step_height,
755 p->stepwise.max_width, p->stepwise.max_height);
756 break;
757 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
758 /* fall through */
759 default:
760 pr_cont("\n");
761 break;
762 }
763 }
764
765 static void v4l_print_frmivalenum(const void *arg, bool write_only)
766 {
767 const struct v4l2_frmivalenum *p = arg;
768
769 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
770 p->index,
771 (p->pixel_format & 0xff),
772 (p->pixel_format >> 8) & 0xff,
773 (p->pixel_format >> 16) & 0xff,
774 (p->pixel_format >> 24) & 0xff,
775 p->width, p->height, p->type);
776 switch (p->type) {
777 case V4L2_FRMIVAL_TYPE_DISCRETE:
778 pr_cont(", fps=%d/%d\n",
779 p->discrete.numerator,
780 p->discrete.denominator);
781 break;
782 case V4L2_FRMIVAL_TYPE_STEPWISE:
783 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
784 p->stepwise.min.numerator,
785 p->stepwise.min.denominator,
786 p->stepwise.max.numerator,
787 p->stepwise.max.denominator,
788 p->stepwise.step.numerator,
789 p->stepwise.step.denominator);
790 break;
791 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
792 /* fall through */
793 default:
794 pr_cont("\n");
795 break;
796 }
797 }
798
799 static void v4l_print_event(const void *arg, bool write_only)
800 {
801 const struct v4l2_event *p = arg;
802 const struct v4l2_event_ctrl *c;
803
804 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
805 "timestamp=%lu.%9.9lu\n",
806 p->type, p->pending, p->sequence, p->id,
807 p->timestamp.tv_sec, p->timestamp.tv_nsec);
808 switch (p->type) {
809 case V4L2_EVENT_VSYNC:
810 printk(KERN_DEBUG "field=%s\n",
811 prt_names(p->u.vsync.field, v4l2_field_names));
812 break;
813 case V4L2_EVENT_CTRL:
814 c = &p->u.ctrl;
815 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
816 c->changes, c->type);
817 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
818 pr_cont("value64=%lld, ", c->value64);
819 else
820 pr_cont("value=%d, ", c->value);
821 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
822 "default_value=%d\n",
823 c->flags, c->minimum, c->maximum,
824 c->step, c->default_value);
825 break;
826 case V4L2_EVENT_FRAME_SYNC:
827 pr_cont("frame_sequence=%u\n",
828 p->u.frame_sync.frame_sequence);
829 break;
830 }
831 }
832
833 static void v4l_print_event_subscription(const void *arg, bool write_only)
834 {
835 const struct v4l2_event_subscription *p = arg;
836
837 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
838 p->type, p->id, p->flags);
839 }
840
841 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
842 {
843 const struct v4l2_sliced_vbi_cap *p = arg;
844 int i;
845
846 pr_cont("type=%s, service_set=0x%08x\n",
847 prt_names(p->type, v4l2_type_names), p->service_set);
848 for (i = 0; i < 24; i++)
849 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
850 p->service_lines[0][i],
851 p->service_lines[1][i]);
852 }
853
854 static void v4l_print_freq_band(const void *arg, bool write_only)
855 {
856 const struct v4l2_frequency_band *p = arg;
857
858 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
859 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
860 p->tuner, p->type, p->index,
861 p->capability, p->rangelow,
862 p->rangehigh, p->modulation);
863 }
864
865 static void v4l_print_edid(const void *arg, bool write_only)
866 {
867 const struct v4l2_edid *p = arg;
868
869 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
870 p->pad, p->start_block, p->blocks);
871 }
872
873 static void v4l_print_u32(const void *arg, bool write_only)
874 {
875 pr_cont("value=%u\n", *(const u32 *)arg);
876 }
877
878 static void v4l_print_newline(const void *arg, bool write_only)
879 {
880 pr_cont("\n");
881 }
882
883 static void v4l_print_default(const void *arg, bool write_only)
884 {
885 pr_cont("driver-specific ioctl\n");
886 }
887
888 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
889 {
890 __u32 i;
891
892 /* zero the reserved fields */
893 c->reserved[0] = c->reserved[1] = 0;
894 for (i = 0; i < c->count; i++)
895 c->controls[i].reserved2[0] = 0;
896
897 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
898 when using extended controls.
899 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
900 is it allowed for backwards compatibility.
901 */
902 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
903 return 0;
904 if (c->ctrl_class == 0)
905 return 1;
906 /* Check that all controls are from the same control class. */
907 for (i = 0; i < c->count; i++) {
908 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
909 c->error_idx = i;
910 return 0;
911 }
912 }
913 return 1;
914 }
915
916 static int check_fmt(struct file *file, enum v4l2_buf_type type)
917 {
918 struct video_device *vfd = video_devdata(file);
919 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
920 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
921 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
922 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
923 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
924 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
925
926 if (ops == NULL)
927 return -EINVAL;
928
929 switch (type) {
930 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
931 if (is_vid && is_rx &&
932 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
933 return 0;
934 break;
935 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
936 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
937 return 0;
938 break;
939 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
940 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
941 return 0;
942 break;
943 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
944 if (is_vid && is_tx &&
945 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
946 return 0;
947 break;
948 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
949 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
950 return 0;
951 break;
952 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
953 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
954 return 0;
955 break;
956 case V4L2_BUF_TYPE_VBI_CAPTURE:
957 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
958 return 0;
959 break;
960 case V4L2_BUF_TYPE_VBI_OUTPUT:
961 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
962 return 0;
963 break;
964 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
965 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
966 return 0;
967 break;
968 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
969 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
970 return 0;
971 break;
972 case V4L2_BUF_TYPE_SDR_CAPTURE:
973 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
974 return 0;
975 break;
976 default:
977 break;
978 }
979 return -EINVAL;
980 }
981
982 static void v4l_sanitize_format(struct v4l2_format *fmt)
983 {
984 unsigned int offset;
985
986 /*
987 * The v4l2_pix_format structure has been extended with fields that were
988 * not previously required to be set to zero by applications. The priv
989 * field, when set to a magic value, indicates the the extended fields
990 * are valid. Otherwise they will contain undefined values. To simplify
991 * the API towards drivers zero the extended fields and set the priv
992 * field to the magic value when the extended pixel format structure
993 * isn't used by applications.
994 */
995
996 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
997 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
998 return;
999
1000 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1001 return;
1002
1003 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1004
1005 offset = offsetof(struct v4l2_pix_format, priv)
1006 + sizeof(fmt->fmt.pix.priv);
1007 memset(((void *)&fmt->fmt.pix) + offset, 0,
1008 sizeof(fmt->fmt.pix) - offset);
1009 }
1010
1011 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1012 struct file *file, void *fh, void *arg)
1013 {
1014 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1015 int ret;
1016
1017 cap->version = LINUX_VERSION_CODE;
1018
1019 ret = ops->vidioc_querycap(file, fh, cap);
1020
1021 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1022 /*
1023 * Drivers MUST fill in device_caps, so check for this and
1024 * warn if it was forgotten.
1025 */
1026 WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1027 !cap->device_caps);
1028 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1029
1030 return ret;
1031 }
1032
1033 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1034 struct file *file, void *fh, void *arg)
1035 {
1036 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1037 }
1038
1039 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1040 struct file *file, void *fh, void *arg)
1041 {
1042 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1043 }
1044
1045 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1046 struct file *file, void *fh, void *arg)
1047 {
1048 struct video_device *vfd;
1049 u32 *p = arg;
1050
1051 vfd = video_devdata(file);
1052 *p = v4l2_prio_max(vfd->prio);
1053 return 0;
1054 }
1055
1056 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1057 struct file *file, void *fh, void *arg)
1058 {
1059 struct video_device *vfd;
1060 struct v4l2_fh *vfh;
1061 u32 *p = arg;
1062
1063 vfd = video_devdata(file);
1064 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1065 return -ENOTTY;
1066 vfh = file->private_data;
1067 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1068 }
1069
1070 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1071 struct file *file, void *fh, void *arg)
1072 {
1073 struct video_device *vfd = video_devdata(file);
1074 struct v4l2_input *p = arg;
1075
1076 /*
1077 * We set the flags for CAP_DV_TIMINGS &
1078 * CAP_STD here based on ioctl handler provided by the
1079 * driver. If the driver doesn't support these
1080 * for a specific input, it must override these flags.
1081 */
1082 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1083 p->capabilities |= V4L2_IN_CAP_STD;
1084
1085 return ops->vidioc_enum_input(file, fh, p);
1086 }
1087
1088 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1089 struct file *file, void *fh, void *arg)
1090 {
1091 struct video_device *vfd = video_devdata(file);
1092 struct v4l2_output *p = arg;
1093
1094 /*
1095 * We set the flags for CAP_DV_TIMINGS &
1096 * CAP_STD here based on ioctl handler provided by the
1097 * driver. If the driver doesn't support these
1098 * for a specific output, it must override these flags.
1099 */
1100 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1101 p->capabilities |= V4L2_OUT_CAP_STD;
1102
1103 return ops->vidioc_enum_output(file, fh, p);
1104 }
1105
1106 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1107 struct file *file, void *fh, void *arg)
1108 {
1109 struct v4l2_fmtdesc *p = arg;
1110 struct video_device *vfd = video_devdata(file);
1111 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1112 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1113 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1114 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1115
1116 switch (p->type) {
1117 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1118 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1119 break;
1120 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1121 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1122 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1123 break;
1124 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1125 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1126 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1127 break;
1128 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1129 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1130 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1131 break;
1132 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1133 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1134 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1135 break;
1136 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1137 case V4L2_BUF_TYPE_SDR_CAPTURE:
1138 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1139 break;
1140 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1141 }
1142 return -EINVAL;
1143 }
1144
1145 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1146 struct file *file, void *fh, void *arg)
1147 {
1148 struct v4l2_format *p = arg;
1149 struct video_device *vfd = video_devdata(file);
1150 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1151 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1152 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1153 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1154 int ret;
1155
1156 /*
1157 * fmt can't be cleared for these overlay types due to the 'clips'
1158 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1159 * Those are provided by the user. So handle these two overlay types
1160 * first, and then just do a simple memset for the other types.
1161 */
1162 switch (p->type) {
1163 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1164 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1165 struct v4l2_clip __user *clips = p->fmt.win.clips;
1166 u32 clipcount = p->fmt.win.clipcount;
1167 void __user *bitmap = p->fmt.win.bitmap;
1168
1169 memset(&p->fmt, 0, sizeof(p->fmt));
1170 p->fmt.win.clips = clips;
1171 p->fmt.win.clipcount = clipcount;
1172 p->fmt.win.bitmap = bitmap;
1173 break;
1174 }
1175 default:
1176 memset(&p->fmt, 0, sizeof(p->fmt));
1177 break;
1178 }
1179
1180 switch (p->type) {
1181 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1182 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1183 break;
1184 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1185 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1186 /* just in case the driver zeroed it again */
1187 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1188 return ret;
1189 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1190 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1191 break;
1192 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1193 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1194 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1195 break;
1196 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1197 case V4L2_BUF_TYPE_VBI_CAPTURE:
1198 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1199 break;
1200 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1201 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1202 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1203 break;
1204 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1205 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1206 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1207 break;
1208 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1209 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1210 /* just in case the driver zeroed it again */
1211 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1212 return ret;
1213 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1214 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1215 break;
1216 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1217 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1218 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1219 break;
1220 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1221 case V4L2_BUF_TYPE_VBI_OUTPUT:
1222 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1223 break;
1224 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1225 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1226 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1227 break;
1228 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1229 case V4L2_BUF_TYPE_SDR_CAPTURE:
1230 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1231 break;
1232 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1233 }
1234 return -EINVAL;
1235 }
1236
1237 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1238 struct file *file, void *fh, void *arg)
1239 {
1240 struct v4l2_format *p = arg;
1241 struct video_device *vfd = video_devdata(file);
1242 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1243 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1244 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1245 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1246 int ret;
1247
1248 v4l_sanitize_format(p);
1249
1250 switch (p->type) {
1251 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1252 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1253 break;
1254 CLEAR_AFTER_FIELD(p, fmt.pix);
1255 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1256 /* just in case the driver zeroed it again */
1257 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1258 return ret;
1259 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1260 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1261 break;
1262 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1263 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1264 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1265 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1266 break;
1267 CLEAR_AFTER_FIELD(p, fmt.win);
1268 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1269 case V4L2_BUF_TYPE_VBI_CAPTURE:
1270 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1271 break;
1272 CLEAR_AFTER_FIELD(p, fmt.vbi);
1273 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1274 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1275 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1276 break;
1277 CLEAR_AFTER_FIELD(p, fmt.sliced);
1278 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1279 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1280 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1281 break;
1282 CLEAR_AFTER_FIELD(p, fmt.pix);
1283 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1284 /* just in case the driver zeroed it again */
1285 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1286 return ret;
1287 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1288 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1289 break;
1290 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1291 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1292 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1293 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1294 break;
1295 CLEAR_AFTER_FIELD(p, fmt.win);
1296 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1297 case V4L2_BUF_TYPE_VBI_OUTPUT:
1298 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1299 break;
1300 CLEAR_AFTER_FIELD(p, fmt.vbi);
1301 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1302 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1303 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1304 break;
1305 CLEAR_AFTER_FIELD(p, fmt.sliced);
1306 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1307 case V4L2_BUF_TYPE_SDR_CAPTURE:
1308 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1309 break;
1310 CLEAR_AFTER_FIELD(p, fmt.sdr);
1311 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1312 }
1313 return -EINVAL;
1314 }
1315
1316 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1317 struct file *file, void *fh, void *arg)
1318 {
1319 struct v4l2_format *p = arg;
1320 struct video_device *vfd = video_devdata(file);
1321 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1322 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1323 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1324 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1325 int ret;
1326
1327 v4l_sanitize_format(p);
1328
1329 switch (p->type) {
1330 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1331 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1332 break;
1333 CLEAR_AFTER_FIELD(p, fmt.pix);
1334 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1335 /* just in case the driver zeroed it again */
1336 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1337 return ret;
1338 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1339 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1340 break;
1341 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1342 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1343 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1344 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1345 break;
1346 CLEAR_AFTER_FIELD(p, fmt.win);
1347 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1348 case V4L2_BUF_TYPE_VBI_CAPTURE:
1349 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1350 break;
1351 CLEAR_AFTER_FIELD(p, fmt.vbi);
1352 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1353 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1354 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1355 break;
1356 CLEAR_AFTER_FIELD(p, fmt.sliced);
1357 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1358 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1359 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1360 break;
1361 CLEAR_AFTER_FIELD(p, fmt.pix);
1362 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1363 /* just in case the driver zeroed it again */
1364 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1365 return ret;
1366 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1367 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1368 break;
1369 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1370 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1371 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1372 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1373 break;
1374 CLEAR_AFTER_FIELD(p, fmt.win);
1375 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1376 case V4L2_BUF_TYPE_VBI_OUTPUT:
1377 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1378 break;
1379 CLEAR_AFTER_FIELD(p, fmt.vbi);
1380 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1381 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1382 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1383 break;
1384 CLEAR_AFTER_FIELD(p, fmt.sliced);
1385 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1386 case V4L2_BUF_TYPE_SDR_CAPTURE:
1387 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1388 break;
1389 CLEAR_AFTER_FIELD(p, fmt.sdr);
1390 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1391 }
1392 return -EINVAL;
1393 }
1394
1395 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1396 struct file *file, void *fh, void *arg)
1397 {
1398 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1399 }
1400
1401 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1402 struct file *file, void *fh, void *arg)
1403 {
1404 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1405 }
1406
1407 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1408 struct file *file, void *fh, void *arg)
1409 {
1410 struct video_device *vfd = video_devdata(file);
1411 struct v4l2_tuner *p = arg;
1412 int err;
1413
1414 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1415 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1416 err = ops->vidioc_g_tuner(file, fh, p);
1417 if (!err)
1418 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1419 return err;
1420 }
1421
1422 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1423 struct file *file, void *fh, void *arg)
1424 {
1425 struct video_device *vfd = video_devdata(file);
1426 struct v4l2_tuner *p = arg;
1427
1428 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1429 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1430 return ops->vidioc_s_tuner(file, fh, p);
1431 }
1432
1433 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1434 struct file *file, void *fh, void *arg)
1435 {
1436 struct v4l2_modulator *p = arg;
1437 int err;
1438
1439 err = ops->vidioc_g_modulator(file, fh, p);
1440 if (!err)
1441 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1442 return err;
1443 }
1444
1445 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1446 struct file *file, void *fh, void *arg)
1447 {
1448 struct video_device *vfd = video_devdata(file);
1449 struct v4l2_frequency *p = arg;
1450
1451 if (vfd->vfl_type == VFL_TYPE_SDR)
1452 p->type = V4L2_TUNER_ADC;
1453 else
1454 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1455 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1456 return ops->vidioc_g_frequency(file, fh, p);
1457 }
1458
1459 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1460 struct file *file, void *fh, void *arg)
1461 {
1462 struct video_device *vfd = video_devdata(file);
1463 const struct v4l2_frequency *p = arg;
1464 enum v4l2_tuner_type type;
1465
1466 if (vfd->vfl_type == VFL_TYPE_SDR) {
1467 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
1468 return -EINVAL;
1469 } else {
1470 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1471 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1472 if (type != p->type)
1473 return -EINVAL;
1474 }
1475 return ops->vidioc_s_frequency(file, fh, p);
1476 }
1477
1478 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1479 struct file *file, void *fh, void *arg)
1480 {
1481 struct video_device *vfd = video_devdata(file);
1482 struct v4l2_standard *p = arg;
1483 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1484 unsigned int index = p->index, i, j = 0;
1485 const char *descr = "";
1486
1487 /* Return -ENODATA if the tvnorms for the current input
1488 or output is 0, meaning that it doesn't support this API. */
1489 if (id == 0)
1490 return -ENODATA;
1491
1492 /* Return norm array in a canonical way */
1493 for (i = 0; i <= index && id; i++) {
1494 /* last std value in the standards array is 0, so this
1495 while always ends there since (id & 0) == 0. */
1496 while ((id & standards[j].std) != standards[j].std)
1497 j++;
1498 curr_id = standards[j].std;
1499 descr = standards[j].descr;
1500 j++;
1501 if (curr_id == 0)
1502 break;
1503 if (curr_id != V4L2_STD_PAL &&
1504 curr_id != V4L2_STD_SECAM &&
1505 curr_id != V4L2_STD_NTSC)
1506 id &= ~curr_id;
1507 }
1508 if (i <= index)
1509 return -EINVAL;
1510
1511 v4l2_video_std_construct(p, curr_id, descr);
1512 return 0;
1513 }
1514
1515 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1516 struct file *file, void *fh, void *arg)
1517 {
1518 struct video_device *vfd = video_devdata(file);
1519 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1520
1521 norm = id & vfd->tvnorms;
1522 if (vfd->tvnorms && !norm) /* Check if std is supported */
1523 return -EINVAL;
1524
1525 /* Calls the specific handler */
1526 return ops->vidioc_s_std(file, fh, norm);
1527 }
1528
1529 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1530 struct file *file, void *fh, void *arg)
1531 {
1532 struct video_device *vfd = video_devdata(file);
1533 v4l2_std_id *p = arg;
1534
1535 /*
1536 * If no signal is detected, then the driver should return
1537 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1538 * any standards that do not apply removed.
1539 *
1540 * This means that tuners, audio and video decoders can join
1541 * their efforts to improve the standards detection.
1542 */
1543 *p = vfd->tvnorms;
1544 return ops->vidioc_querystd(file, fh, arg);
1545 }
1546
1547 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1548 struct file *file, void *fh, void *arg)
1549 {
1550 struct video_device *vfd = video_devdata(file);
1551 struct v4l2_hw_freq_seek *p = arg;
1552 enum v4l2_tuner_type type;
1553
1554 /* s_hw_freq_seek is not supported for SDR for now */
1555 if (vfd->vfl_type == VFL_TYPE_SDR)
1556 return -EINVAL;
1557
1558 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1559 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1560 if (p->type != type)
1561 return -EINVAL;
1562 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1563 }
1564
1565 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1566 struct file *file, void *fh, void *arg)
1567 {
1568 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1569 }
1570
1571 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1572 struct file *file, void *fh, void *arg)
1573 {
1574 struct v4l2_requestbuffers *p = arg;
1575 int ret = check_fmt(file, p->type);
1576
1577 if (ret)
1578 return ret;
1579
1580 CLEAR_AFTER_FIELD(p, memory);
1581
1582 return ops->vidioc_reqbufs(file, fh, p);
1583 }
1584
1585 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1586 struct file *file, void *fh, void *arg)
1587 {
1588 struct v4l2_buffer *p = arg;
1589 int ret = check_fmt(file, p->type);
1590
1591 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1592 }
1593
1594 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1595 struct file *file, void *fh, void *arg)
1596 {
1597 struct v4l2_buffer *p = arg;
1598 int ret = check_fmt(file, p->type);
1599
1600 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1601 }
1602
1603 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1604 struct file *file, void *fh, void *arg)
1605 {
1606 struct v4l2_buffer *p = arg;
1607 int ret = check_fmt(file, p->type);
1608
1609 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1610 }
1611
1612 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1613 struct file *file, void *fh, void *arg)
1614 {
1615 struct v4l2_create_buffers *create = arg;
1616 int ret = check_fmt(file, create->format.type);
1617
1618 if (ret)
1619 return ret;
1620
1621 v4l_sanitize_format(&create->format);
1622
1623 ret = ops->vidioc_create_bufs(file, fh, create);
1624
1625 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1626 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1627 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1628
1629 return ret;
1630 }
1631
1632 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1633 struct file *file, void *fh, void *arg)
1634 {
1635 struct v4l2_buffer *b = arg;
1636 int ret = check_fmt(file, b->type);
1637
1638 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1639 }
1640
1641 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1642 struct file *file, void *fh, void *arg)
1643 {
1644 struct v4l2_streamparm *p = arg;
1645 v4l2_std_id std;
1646 int ret = check_fmt(file, p->type);
1647
1648 if (ret)
1649 return ret;
1650 if (ops->vidioc_g_parm)
1651 return ops->vidioc_g_parm(file, fh, p);
1652 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1653 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1654 return -EINVAL;
1655 p->parm.capture.readbuffers = 2;
1656 ret = ops->vidioc_g_std(file, fh, &std);
1657 if (ret == 0)
1658 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1659 return ret;
1660 }
1661
1662 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1663 struct file *file, void *fh, void *arg)
1664 {
1665 struct v4l2_streamparm *p = arg;
1666 int ret = check_fmt(file, p->type);
1667
1668 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1669 }
1670
1671 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1672 struct file *file, void *fh, void *arg)
1673 {
1674 struct video_device *vfd = video_devdata(file);
1675 struct v4l2_queryctrl *p = arg;
1676 struct v4l2_fh *vfh =
1677 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1678
1679 if (vfh && vfh->ctrl_handler)
1680 return v4l2_queryctrl(vfh->ctrl_handler, p);
1681 if (vfd->ctrl_handler)
1682 return v4l2_queryctrl(vfd->ctrl_handler, p);
1683 if (ops->vidioc_queryctrl)
1684 return ops->vidioc_queryctrl(file, fh, p);
1685 return -ENOTTY;
1686 }
1687
1688 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1689 struct file *file, void *fh, void *arg)
1690 {
1691 struct video_device *vfd = video_devdata(file);
1692 struct v4l2_query_ext_ctrl *p = arg;
1693 struct v4l2_fh *vfh =
1694 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1695
1696 if (vfh && vfh->ctrl_handler)
1697 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1698 if (vfd->ctrl_handler)
1699 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1700 if (ops->vidioc_query_ext_ctrl)
1701 return ops->vidioc_query_ext_ctrl(file, fh, p);
1702 return -ENOTTY;
1703 }
1704
1705 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1706 struct file *file, void *fh, void *arg)
1707 {
1708 struct video_device *vfd = video_devdata(file);
1709 struct v4l2_querymenu *p = arg;
1710 struct v4l2_fh *vfh =
1711 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1712
1713 if (vfh && vfh->ctrl_handler)
1714 return v4l2_querymenu(vfh->ctrl_handler, p);
1715 if (vfd->ctrl_handler)
1716 return v4l2_querymenu(vfd->ctrl_handler, p);
1717 if (ops->vidioc_querymenu)
1718 return ops->vidioc_querymenu(file, fh, p);
1719 return -ENOTTY;
1720 }
1721
1722 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1723 struct file *file, void *fh, void *arg)
1724 {
1725 struct video_device *vfd = video_devdata(file);
1726 struct v4l2_control *p = arg;
1727 struct v4l2_fh *vfh =
1728 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1729 struct v4l2_ext_controls ctrls;
1730 struct v4l2_ext_control ctrl;
1731
1732 if (vfh && vfh->ctrl_handler)
1733 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1734 if (vfd->ctrl_handler)
1735 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1736 if (ops->vidioc_g_ctrl)
1737 return ops->vidioc_g_ctrl(file, fh, p);
1738 if (ops->vidioc_g_ext_ctrls == NULL)
1739 return -ENOTTY;
1740
1741 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1742 ctrls.count = 1;
1743 ctrls.controls = &ctrl;
1744 ctrl.id = p->id;
1745 ctrl.value = p->value;
1746 if (check_ext_ctrls(&ctrls, 1)) {
1747 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1748
1749 if (ret == 0)
1750 p->value = ctrl.value;
1751 return ret;
1752 }
1753 return -EINVAL;
1754 }
1755
1756 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1757 struct file *file, void *fh, void *arg)
1758 {
1759 struct video_device *vfd = video_devdata(file);
1760 struct v4l2_control *p = arg;
1761 struct v4l2_fh *vfh =
1762 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1763 struct v4l2_ext_controls ctrls;
1764 struct v4l2_ext_control ctrl;
1765
1766 if (vfh && vfh->ctrl_handler)
1767 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1768 if (vfd->ctrl_handler)
1769 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1770 if (ops->vidioc_s_ctrl)
1771 return ops->vidioc_s_ctrl(file, fh, p);
1772 if (ops->vidioc_s_ext_ctrls == NULL)
1773 return -ENOTTY;
1774
1775 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1776 ctrls.count = 1;
1777 ctrls.controls = &ctrl;
1778 ctrl.id = p->id;
1779 ctrl.value = p->value;
1780 if (check_ext_ctrls(&ctrls, 1))
1781 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1782 return -EINVAL;
1783 }
1784
1785 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1786 struct file *file, void *fh, void *arg)
1787 {
1788 struct video_device *vfd = video_devdata(file);
1789 struct v4l2_ext_controls *p = arg;
1790 struct v4l2_fh *vfh =
1791 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1792
1793 p->error_idx = p->count;
1794 if (vfh && vfh->ctrl_handler)
1795 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1796 if (vfd->ctrl_handler)
1797 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1798 if (ops->vidioc_g_ext_ctrls == NULL)
1799 return -ENOTTY;
1800 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1801 -EINVAL;
1802 }
1803
1804 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1805 struct file *file, void *fh, void *arg)
1806 {
1807 struct video_device *vfd = video_devdata(file);
1808 struct v4l2_ext_controls *p = arg;
1809 struct v4l2_fh *vfh =
1810 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1811
1812 p->error_idx = p->count;
1813 if (vfh && vfh->ctrl_handler)
1814 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1815 if (vfd->ctrl_handler)
1816 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1817 if (ops->vidioc_s_ext_ctrls == NULL)
1818 return -ENOTTY;
1819 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1820 -EINVAL;
1821 }
1822
1823 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1824 struct file *file, void *fh, void *arg)
1825 {
1826 struct video_device *vfd = video_devdata(file);
1827 struct v4l2_ext_controls *p = arg;
1828 struct v4l2_fh *vfh =
1829 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1830
1831 p->error_idx = p->count;
1832 if (vfh && vfh->ctrl_handler)
1833 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1834 if (vfd->ctrl_handler)
1835 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1836 if (ops->vidioc_try_ext_ctrls == NULL)
1837 return -ENOTTY;
1838 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1839 -EINVAL;
1840 }
1841
1842 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1843 struct file *file, void *fh, void *arg)
1844 {
1845 struct v4l2_crop *p = arg;
1846 struct v4l2_selection s = {
1847 .type = p->type,
1848 };
1849 int ret;
1850
1851 if (ops->vidioc_g_crop)
1852 return ops->vidioc_g_crop(file, fh, p);
1853 /* simulate capture crop using selection api */
1854
1855 /* crop means compose for output devices */
1856 if (V4L2_TYPE_IS_OUTPUT(p->type))
1857 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1858 else
1859 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1860
1861 ret = ops->vidioc_g_selection(file, fh, &s);
1862
1863 /* copying results to old structure on success */
1864 if (!ret)
1865 p->c = s.r;
1866 return ret;
1867 }
1868
1869 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1870 struct file *file, void *fh, void *arg)
1871 {
1872 struct v4l2_crop *p = arg;
1873 struct v4l2_selection s = {
1874 .type = p->type,
1875 .r = p->c,
1876 };
1877
1878 if (ops->vidioc_s_crop)
1879 return ops->vidioc_s_crop(file, fh, p);
1880 /* simulate capture crop using selection api */
1881
1882 /* crop means compose for output devices */
1883 if (V4L2_TYPE_IS_OUTPUT(p->type))
1884 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1885 else
1886 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1887
1888 return ops->vidioc_s_selection(file, fh, &s);
1889 }
1890
1891 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1892 struct file *file, void *fh, void *arg)
1893 {
1894 struct v4l2_cropcap *p = arg;
1895
1896 if (ops->vidioc_g_selection) {
1897 struct v4l2_selection s = { .type = p->type };
1898 int ret;
1899
1900 /* obtaining bounds */
1901 if (V4L2_TYPE_IS_OUTPUT(p->type))
1902 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1903 else
1904 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1905
1906 ret = ops->vidioc_g_selection(file, fh, &s);
1907 if (ret)
1908 return ret;
1909 p->bounds = s.r;
1910
1911 /* obtaining defrect */
1912 if (V4L2_TYPE_IS_OUTPUT(p->type))
1913 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1914 else
1915 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1916
1917 ret = ops->vidioc_g_selection(file, fh, &s);
1918 if (ret)
1919 return ret;
1920 p->defrect = s.r;
1921 }
1922
1923 /* setting trivial pixelaspect */
1924 p->pixelaspect.numerator = 1;
1925 p->pixelaspect.denominator = 1;
1926
1927 if (ops->vidioc_cropcap)
1928 return ops->vidioc_cropcap(file, fh, p);
1929
1930 return 0;
1931 }
1932
1933 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1934 struct file *file, void *fh, void *arg)
1935 {
1936 struct video_device *vfd = video_devdata(file);
1937 int ret;
1938
1939 if (vfd->v4l2_dev)
1940 pr_info("%s: ================= START STATUS =================\n",
1941 vfd->v4l2_dev->name);
1942 ret = ops->vidioc_log_status(file, fh);
1943 if (vfd->v4l2_dev)
1944 pr_info("%s: ================== END STATUS ==================\n",
1945 vfd->v4l2_dev->name);
1946 return ret;
1947 }
1948
1949 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1950 struct file *file, void *fh, void *arg)
1951 {
1952 #ifdef CONFIG_VIDEO_ADV_DEBUG
1953 struct v4l2_dbg_register *p = arg;
1954 struct video_device *vfd = video_devdata(file);
1955 struct v4l2_subdev *sd;
1956 int idx = 0;
1957
1958 if (!capable(CAP_SYS_ADMIN))
1959 return -EPERM;
1960 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1961 if (vfd->v4l2_dev == NULL)
1962 return -EINVAL;
1963 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1964 if (p->match.addr == idx++)
1965 return v4l2_subdev_call(sd, core, g_register, p);
1966 return -EINVAL;
1967 }
1968 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1969 (ops->vidioc_g_chip_info || p->match.addr == 0))
1970 return ops->vidioc_g_register(file, fh, p);
1971 return -EINVAL;
1972 #else
1973 return -ENOTTY;
1974 #endif
1975 }
1976
1977 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1978 struct file *file, void *fh, void *arg)
1979 {
1980 #ifdef CONFIG_VIDEO_ADV_DEBUG
1981 const struct v4l2_dbg_register *p = arg;
1982 struct video_device *vfd = video_devdata(file);
1983 struct v4l2_subdev *sd;
1984 int idx = 0;
1985
1986 if (!capable(CAP_SYS_ADMIN))
1987 return -EPERM;
1988 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1989 if (vfd->v4l2_dev == NULL)
1990 return -EINVAL;
1991 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1992 if (p->match.addr == idx++)
1993 return v4l2_subdev_call(sd, core, s_register, p);
1994 return -EINVAL;
1995 }
1996 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
1997 (ops->vidioc_g_chip_info || p->match.addr == 0))
1998 return ops->vidioc_s_register(file, fh, p);
1999 return -EINVAL;
2000 #else
2001 return -ENOTTY;
2002 #endif
2003 }
2004
2005 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2006 struct file *file, void *fh, void *arg)
2007 {
2008 #ifdef CONFIG_VIDEO_ADV_DEBUG
2009 struct video_device *vfd = video_devdata(file);
2010 struct v4l2_dbg_chip_info *p = arg;
2011 struct v4l2_subdev *sd;
2012 int idx = 0;
2013
2014 switch (p->match.type) {
2015 case V4L2_CHIP_MATCH_BRIDGE:
2016 if (ops->vidioc_s_register)
2017 p->flags |= V4L2_CHIP_FL_WRITABLE;
2018 if (ops->vidioc_g_register)
2019 p->flags |= V4L2_CHIP_FL_READABLE;
2020 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2021 if (ops->vidioc_g_chip_info)
2022 return ops->vidioc_g_chip_info(file, fh, arg);
2023 if (p->match.addr)
2024 return -EINVAL;
2025 return 0;
2026
2027 case V4L2_CHIP_MATCH_SUBDEV:
2028 if (vfd->v4l2_dev == NULL)
2029 break;
2030 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2031 if (p->match.addr != idx++)
2032 continue;
2033 if (sd->ops->core && sd->ops->core->s_register)
2034 p->flags |= V4L2_CHIP_FL_WRITABLE;
2035 if (sd->ops->core && sd->ops->core->g_register)
2036 p->flags |= V4L2_CHIP_FL_READABLE;
2037 strlcpy(p->name, sd->name, sizeof(p->name));
2038 return 0;
2039 }
2040 break;
2041 }
2042 return -EINVAL;
2043 #else
2044 return -ENOTTY;
2045 #endif
2046 }
2047
2048 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2049 struct file *file, void *fh, void *arg)
2050 {
2051 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2052 }
2053
2054 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2055 struct file *file, void *fh, void *arg)
2056 {
2057 return ops->vidioc_subscribe_event(fh, arg);
2058 }
2059
2060 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2061 struct file *file, void *fh, void *arg)
2062 {
2063 return ops->vidioc_unsubscribe_event(fh, arg);
2064 }
2065
2066 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2067 struct file *file, void *fh, void *arg)
2068 {
2069 struct v4l2_sliced_vbi_cap *p = arg;
2070 int ret = check_fmt(file, p->type);
2071
2072 if (ret)
2073 return ret;
2074
2075 /* Clear up to type, everything after type is zeroed already */
2076 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2077
2078 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2079 }
2080
2081 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2082 struct file *file, void *fh, void *arg)
2083 {
2084 struct video_device *vfd = video_devdata(file);
2085 struct v4l2_frequency_band *p = arg;
2086 enum v4l2_tuner_type type;
2087 int err;
2088
2089 if (vfd->vfl_type == VFL_TYPE_SDR) {
2090 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
2091 return -EINVAL;
2092 type = p->type;
2093 } else {
2094 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2095 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2096 if (type != p->type)
2097 return -EINVAL;
2098 }
2099 if (ops->vidioc_enum_freq_bands) {
2100 err = ops->vidioc_enum_freq_bands(file, fh, p);
2101 if (err != -ENOTTY)
2102 return err;
2103 }
2104 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2105 struct v4l2_tuner t = {
2106 .index = p->tuner,
2107 .type = type,
2108 };
2109
2110 if (p->index)
2111 return -EINVAL;
2112 err = ops->vidioc_g_tuner(file, fh, &t);
2113 if (err)
2114 return err;
2115 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2116 p->rangelow = t.rangelow;
2117 p->rangehigh = t.rangehigh;
2118 p->modulation = (type == V4L2_TUNER_RADIO) ?
2119 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2120 return 0;
2121 }
2122 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2123 struct v4l2_modulator m = {
2124 .index = p->tuner,
2125 };
2126
2127 if (type != V4L2_TUNER_RADIO)
2128 return -EINVAL;
2129 if (p->index)
2130 return -EINVAL;
2131 err = ops->vidioc_g_modulator(file, fh, &m);
2132 if (err)
2133 return err;
2134 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2135 p->rangelow = m.rangelow;
2136 p->rangehigh = m.rangehigh;
2137 p->modulation = (type == V4L2_TUNER_RADIO) ?
2138 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2139 return 0;
2140 }
2141 return -ENOTTY;
2142 }
2143
2144 struct v4l2_ioctl_info {
2145 unsigned int ioctl;
2146 u32 flags;
2147 const char * const name;
2148 union {
2149 u32 offset;
2150 int (*func)(const struct v4l2_ioctl_ops *ops,
2151 struct file *file, void *fh, void *p);
2152 } u;
2153 void (*debug)(const void *arg, bool write_only);
2154 };
2155
2156 /* This control needs a priority check */
2157 #define INFO_FL_PRIO (1 << 0)
2158 /* This control can be valid if the filehandle passes a control handler. */
2159 #define INFO_FL_CTRL (1 << 1)
2160 /* This is a standard ioctl, no need for special code */
2161 #define INFO_FL_STD (1 << 2)
2162 /* This is ioctl has its own function */
2163 #define INFO_FL_FUNC (1 << 3)
2164 /* Queuing ioctl */
2165 #define INFO_FL_QUEUE (1 << 4)
2166 /* Zero struct from after the field to the end */
2167 #define INFO_FL_CLEAR(v4l2_struct, field) \
2168 ((offsetof(struct v4l2_struct, field) + \
2169 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2170 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2171
2172 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
2173 [_IOC_NR(_ioctl)] = { \
2174 .ioctl = _ioctl, \
2175 .flags = _flags | INFO_FL_STD, \
2176 .name = #_ioctl, \
2177 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
2178 .debug = _debug, \
2179 }
2180
2181 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
2182 [_IOC_NR(_ioctl)] = { \
2183 .ioctl = _ioctl, \
2184 .flags = _flags | INFO_FL_FUNC, \
2185 .name = #_ioctl, \
2186 .u.func = _func, \
2187 .debug = _debug, \
2188 }
2189
2190 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2191 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2192 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2193 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2194 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2195 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2196 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2197 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2198 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2199 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2200 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2201 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2202 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2203 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2204 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2205 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2206 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2207 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2208 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2209 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2210 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2211 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2212 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2213 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2214 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2215 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2216 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2217 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2218 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2219 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2220 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2221 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2222 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2223 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2224 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2225 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2226 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2227 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2228 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2229 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2230 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2231 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2232 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2233 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2234 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2235 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2236 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2237 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2238 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2239 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2240 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2241 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2242 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2243 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2244 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2245 IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2246 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2247 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2248 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2249 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2250 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2251 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2252 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2253 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2254 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2255 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2256 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2257 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2258 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2259 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2260 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2261 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2262 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2263 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2264 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2265 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2266 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2267 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2268 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2269 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2270 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2271 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2272 IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2273 };
2274 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2275
2276 bool v4l2_is_known_ioctl(unsigned int cmd)
2277 {
2278 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2279 return false;
2280 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2281 }
2282
2283 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2284 {
2285 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2286 return vdev->lock;
2287 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2288 return NULL;
2289 if (vdev->queue && vdev->queue->lock &&
2290 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2291 return vdev->queue->lock;
2292 return vdev->lock;
2293 }
2294
2295 /* Common ioctl debug function. This function can be used by
2296 external ioctl messages as well as internal V4L ioctl */
2297 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2298 {
2299 const char *dir, *type;
2300
2301 if (prefix)
2302 printk(KERN_DEBUG "%s: ", prefix);
2303
2304 switch (_IOC_TYPE(cmd)) {
2305 case 'd':
2306 type = "v4l2_int";
2307 break;
2308 case 'V':
2309 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2310 type = "v4l2";
2311 break;
2312 }
2313 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2314 return;
2315 default:
2316 type = "unknown";
2317 break;
2318 }
2319
2320 switch (_IOC_DIR(cmd)) {
2321 case _IOC_NONE: dir = "--"; break;
2322 case _IOC_READ: dir = "r-"; break;
2323 case _IOC_WRITE: dir = "-w"; break;
2324 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2325 default: dir = "*ERR*"; break;
2326 }
2327 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2328 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2329 }
2330 EXPORT_SYMBOL(v4l_printk_ioctl);
2331
2332 static long __video_do_ioctl(struct file *file,
2333 unsigned int cmd, void *arg)
2334 {
2335 struct video_device *vfd = video_devdata(file);
2336 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2337 bool write_only = false;
2338 struct v4l2_ioctl_info default_info;
2339 const struct v4l2_ioctl_info *info;
2340 void *fh = file->private_data;
2341 struct v4l2_fh *vfh = NULL;
2342 int dev_debug = vfd->dev_debug;
2343 long ret = -ENOTTY;
2344
2345 if (ops == NULL) {
2346 pr_warn("%s: has no ioctl_ops.\n",
2347 video_device_node_name(vfd));
2348 return ret;
2349 }
2350
2351 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2352 vfh = file->private_data;
2353
2354 if (v4l2_is_known_ioctl(cmd)) {
2355 info = &v4l2_ioctls[_IOC_NR(cmd)];
2356
2357 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2358 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2359 goto done;
2360
2361 if (vfh && (info->flags & INFO_FL_PRIO)) {
2362 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2363 if (ret)
2364 goto done;
2365 }
2366 } else {
2367 default_info.ioctl = cmd;
2368 default_info.flags = 0;
2369 default_info.debug = v4l_print_default;
2370 info = &default_info;
2371 }
2372
2373 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2374 if (info->flags & INFO_FL_STD) {
2375 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2376 const void *p = vfd->ioctl_ops;
2377 const vidioc_op *vidioc = p + info->u.offset;
2378
2379 ret = (*vidioc)(file, fh, arg);
2380 } else if (info->flags & INFO_FL_FUNC) {
2381 ret = info->u.func(ops, file, fh, arg);
2382 } else if (!ops->vidioc_default) {
2383 ret = -ENOTTY;
2384 } else {
2385 ret = ops->vidioc_default(file, fh,
2386 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2387 cmd, arg);
2388 }
2389
2390 done:
2391 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2392 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2393 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2394 return ret;
2395
2396 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2397 if (ret < 0)
2398 pr_cont(": error %ld", ret);
2399 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2400 pr_cont("\n");
2401 else if (_IOC_DIR(cmd) == _IOC_NONE)
2402 info->debug(arg, write_only);
2403 else {
2404 pr_cont(": ");
2405 info->debug(arg, write_only);
2406 }
2407 }
2408
2409 return ret;
2410 }
2411
2412 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2413 void __user **user_ptr, void ***kernel_ptr)
2414 {
2415 int ret = 0;
2416
2417 switch (cmd) {
2418 case VIDIOC_PREPARE_BUF:
2419 case VIDIOC_QUERYBUF:
2420 case VIDIOC_QBUF:
2421 case VIDIOC_DQBUF: {
2422 struct v4l2_buffer *buf = parg;
2423
2424 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2425 if (buf->length > VIDEO_MAX_PLANES) {
2426 ret = -EINVAL;
2427 break;
2428 }
2429 *user_ptr = (void __user *)buf->m.planes;
2430 *kernel_ptr = (void **)&buf->m.planes;
2431 *array_size = sizeof(struct v4l2_plane) * buf->length;
2432 ret = 1;
2433 }
2434 break;
2435 }
2436
2437 case VIDIOC_G_EDID:
2438 case VIDIOC_S_EDID: {
2439 struct v4l2_edid *edid = parg;
2440
2441 if (edid->blocks) {
2442 if (edid->blocks > 256) {
2443 ret = -EINVAL;
2444 break;
2445 }
2446 *user_ptr = (void __user *)edid->edid;
2447 *kernel_ptr = (void **)&edid->edid;
2448 *array_size = edid->blocks * 128;
2449 ret = 1;
2450 }
2451 break;
2452 }
2453
2454 case VIDIOC_S_EXT_CTRLS:
2455 case VIDIOC_G_EXT_CTRLS:
2456 case VIDIOC_TRY_EXT_CTRLS: {
2457 struct v4l2_ext_controls *ctrls = parg;
2458
2459 if (ctrls->count != 0) {
2460 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2461 ret = -EINVAL;
2462 break;
2463 }
2464 *user_ptr = (void __user *)ctrls->controls;
2465 *kernel_ptr = (void **)&ctrls->controls;
2466 *array_size = sizeof(struct v4l2_ext_control)
2467 * ctrls->count;
2468 ret = 1;
2469 }
2470 break;
2471 }
2472 }
2473
2474 return ret;
2475 }
2476
2477 long
2478 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2479 v4l2_kioctl func)
2480 {
2481 char sbuf[128];
2482 void *mbuf = NULL;
2483 void *parg = (void *)arg;
2484 long err = -EINVAL;
2485 bool has_array_args;
2486 size_t array_size = 0;
2487 void __user *user_ptr = NULL;
2488 void **kernel_ptr = NULL;
2489
2490 /* Copy arguments into temp kernel buffer */
2491 if (_IOC_DIR(cmd) != _IOC_NONE) {
2492 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2493 parg = sbuf;
2494 } else {
2495 /* too big to allocate from stack */
2496 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2497 if (NULL == mbuf)
2498 return -ENOMEM;
2499 parg = mbuf;
2500 }
2501
2502 err = -EFAULT;
2503 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2504 unsigned int n = _IOC_SIZE(cmd);
2505
2506 /*
2507 * In some cases, only a few fields are used as input,
2508 * i.e. when the app sets "index" and then the driver
2509 * fills in the rest of the structure for the thing
2510 * with that index. We only need to copy up the first
2511 * non-input field.
2512 */
2513 if (v4l2_is_known_ioctl(cmd)) {
2514 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2515 if (flags & INFO_FL_CLEAR_MASK)
2516 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2517 }
2518
2519 if (copy_from_user(parg, (void __user *)arg, n))
2520 goto out;
2521
2522 /* zero out anything we don't copy from userspace */
2523 if (n < _IOC_SIZE(cmd))
2524 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2525 } else {
2526 /* read-only ioctl */
2527 memset(parg, 0, _IOC_SIZE(cmd));
2528 }
2529 }
2530
2531 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2532 if (err < 0)
2533 goto out;
2534 has_array_args = err;
2535
2536 if (has_array_args) {
2537 /*
2538 * When adding new types of array args, make sure that the
2539 * parent argument to ioctl (which contains the pointer to the
2540 * array) fits into sbuf (so that mbuf will still remain
2541 * unused up to here).
2542 */
2543 mbuf = kmalloc(array_size, GFP_KERNEL);
2544 err = -ENOMEM;
2545 if (NULL == mbuf)
2546 goto out_array_args;
2547 err = -EFAULT;
2548 if (copy_from_user(mbuf, user_ptr, array_size))
2549 goto out_array_args;
2550 *kernel_ptr = mbuf;
2551 }
2552
2553 /* Handles IOCTL */
2554 err = func(file, cmd, parg);
2555 if (err == -ENOIOCTLCMD)
2556 err = -ENOTTY;
2557 if (err == 0) {
2558 if (cmd == VIDIOC_DQBUF)
2559 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2560 else if (cmd == VIDIOC_QBUF)
2561 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2562 }
2563
2564 if (has_array_args) {
2565 *kernel_ptr = (void __force *)user_ptr;
2566 if (copy_to_user(user_ptr, mbuf, array_size))
2567 err = -EFAULT;
2568 goto out_array_args;
2569 }
2570 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2571 results that must be returned. */
2572 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2573 goto out;
2574
2575 out_array_args:
2576 /* Copy results into user buffer */
2577 switch (_IOC_DIR(cmd)) {
2578 case _IOC_READ:
2579 case (_IOC_WRITE | _IOC_READ):
2580 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2581 err = -EFAULT;
2582 break;
2583 }
2584
2585 out:
2586 kfree(mbuf);
2587 return err;
2588 }
2589 EXPORT_SYMBOL(video_usercopy);
2590
2591 long video_ioctl2(struct file *file,
2592 unsigned int cmd, unsigned long arg)
2593 {
2594 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2595 }
2596 EXPORT_SYMBOL(video_ioctl2);
Linux kernel - Deliverables
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