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Merge remote-tracking branch 'mailbox/mailbox-for-next'
[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-v4l2.h>
30 #include <media/v4l2-mc.h>
31
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 [0] = "0",
146 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
147 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
148 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
149 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
150 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
151 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
152 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
153 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
154 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
155 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
156 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
157 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
158 };
159 EXPORT_SYMBOL(v4l2_type_names);
160
161 static const char *v4l2_memory_names[] = {
162 [V4L2_MEMORY_MMAP] = "mmap",
163 [V4L2_MEMORY_USERPTR] = "userptr",
164 [V4L2_MEMORY_OVERLAY] = "overlay",
165 [V4L2_MEMORY_DMABUF] = "dmabuf",
166 };
167
168 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
169
170 /* ------------------------------------------------------------------ */
171 /* debug help functions */
172
173 static void v4l_print_querycap(const void *arg, bool write_only)
174 {
175 const struct v4l2_capability *p = arg;
176
177 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
178 "capabilities=0x%08x, device_caps=0x%08x\n",
179 (int)sizeof(p->driver), p->driver,
180 (int)sizeof(p->card), p->card,
181 (int)sizeof(p->bus_info), p->bus_info,
182 p->version, p->capabilities, p->device_caps);
183 }
184
185 static void v4l_print_enuminput(const void *arg, bool write_only)
186 {
187 const struct v4l2_input *p = arg;
188
189 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
190 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
191 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
192 p->tuner, (unsigned long long)p->std, p->status,
193 p->capabilities);
194 }
195
196 static void v4l_print_enumoutput(const void *arg, bool write_only)
197 {
198 const struct v4l2_output *p = arg;
199
200 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
201 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
202 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
203 p->modulator, (unsigned long long)p->std, p->capabilities);
204 }
205
206 static void v4l_print_audio(const void *arg, bool write_only)
207 {
208 const struct v4l2_audio *p = arg;
209
210 if (write_only)
211 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
212 else
213 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
214 p->index, (int)sizeof(p->name), p->name,
215 p->capability, p->mode);
216 }
217
218 static void v4l_print_audioout(const void *arg, bool write_only)
219 {
220 const struct v4l2_audioout *p = arg;
221
222 if (write_only)
223 pr_cont("index=%u\n", p->index);
224 else
225 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
226 p->index, (int)sizeof(p->name), p->name,
227 p->capability, p->mode);
228 }
229
230 static void v4l_print_fmtdesc(const void *arg, bool write_only)
231 {
232 const struct v4l2_fmtdesc *p = arg;
233
234 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
235 p->index, prt_names(p->type, v4l2_type_names),
236 p->flags, (p->pixelformat & 0xff),
237 (p->pixelformat >> 8) & 0xff,
238 (p->pixelformat >> 16) & 0xff,
239 (p->pixelformat >> 24) & 0xff,
240 (int)sizeof(p->description), p->description);
241 }
242
243 static void v4l_print_format(const void *arg, bool write_only)
244 {
245 const struct v4l2_format *p = arg;
246 const struct v4l2_pix_format *pix;
247 const struct v4l2_pix_format_mplane *mp;
248 const struct v4l2_vbi_format *vbi;
249 const struct v4l2_sliced_vbi_format *sliced;
250 const struct v4l2_window *win;
251 const struct v4l2_sdr_format *sdr;
252 unsigned i;
253
254 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
255 switch (p->type) {
256 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
257 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
258 pix = &p->fmt.pix;
259 pr_cont(", width=%u, height=%u, "
260 "pixelformat=%c%c%c%c, field=%s, "
261 "bytesperline=%u, sizeimage=%u, colorspace=%d, "
262 "flags=0x%x, ycbcr_enc=%u, quantization=%u, "
263 "xfer_func=%u\n",
264 pix->width, pix->height,
265 (pix->pixelformat & 0xff),
266 (pix->pixelformat >> 8) & 0xff,
267 (pix->pixelformat >> 16) & 0xff,
268 (pix->pixelformat >> 24) & 0xff,
269 prt_names(pix->field, v4l2_field_names),
270 pix->bytesperline, pix->sizeimage,
271 pix->colorspace, pix->flags, pix->ycbcr_enc,
272 pix->quantization, pix->xfer_func);
273 break;
274 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
275 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
276 mp = &p->fmt.pix_mp;
277 pr_cont(", width=%u, height=%u, "
278 "format=%c%c%c%c, field=%s, "
279 "colorspace=%d, num_planes=%u, flags=0x%x, "
280 "ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
281 mp->width, mp->height,
282 (mp->pixelformat & 0xff),
283 (mp->pixelformat >> 8) & 0xff,
284 (mp->pixelformat >> 16) & 0xff,
285 (mp->pixelformat >> 24) & 0xff,
286 prt_names(mp->field, v4l2_field_names),
287 mp->colorspace, mp->num_planes, mp->flags,
288 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
289 for (i = 0; i < mp->num_planes; i++)
290 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
291 mp->plane_fmt[i].bytesperline,
292 mp->plane_fmt[i].sizeimage);
293 break;
294 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
295 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
296 win = &p->fmt.win;
297 /* Note: we can't print the clip list here since the clips
298 * pointer is a userspace pointer, not a kernelspace
299 * pointer. */
300 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",
301 win->w.width, win->w.height, win->w.left, win->w.top,
302 prt_names(win->field, v4l2_field_names),
303 win->chromakey, win->clipcount, win->clips,
304 win->bitmap, win->global_alpha);
305 break;
306 case V4L2_BUF_TYPE_VBI_CAPTURE:
307 case V4L2_BUF_TYPE_VBI_OUTPUT:
308 vbi = &p->fmt.vbi;
309 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
310 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
311 vbi->sampling_rate, vbi->offset,
312 vbi->samples_per_line,
313 (vbi->sample_format & 0xff),
314 (vbi->sample_format >> 8) & 0xff,
315 (vbi->sample_format >> 16) & 0xff,
316 (vbi->sample_format >> 24) & 0xff,
317 vbi->start[0], vbi->start[1],
318 vbi->count[0], vbi->count[1]);
319 break;
320 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
321 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
322 sliced = &p->fmt.sliced;
323 pr_cont(", service_set=0x%08x, io_size=%d\n",
324 sliced->service_set, sliced->io_size);
325 for (i = 0; i < 24; i++)
326 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
327 sliced->service_lines[0][i],
328 sliced->service_lines[1][i]);
329 break;
330 case V4L2_BUF_TYPE_SDR_CAPTURE:
331 case V4L2_BUF_TYPE_SDR_OUTPUT:
332 sdr = &p->fmt.sdr;
333 pr_cont(", pixelformat=%c%c%c%c\n",
334 (sdr->pixelformat >> 0) & 0xff,
335 (sdr->pixelformat >> 8) & 0xff,
336 (sdr->pixelformat >> 16) & 0xff,
337 (sdr->pixelformat >> 24) & 0xff);
338 break;
339 }
340 }
341
342 static void v4l_print_framebuffer(const void *arg, bool write_only)
343 {
344 const struct v4l2_framebuffer *p = arg;
345
346 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
347 "height=%u, pixelformat=%c%c%c%c, "
348 "bytesperline=%u, sizeimage=%u, colorspace=%d\n",
349 p->capability, p->flags, p->base,
350 p->fmt.width, p->fmt.height,
351 (p->fmt.pixelformat & 0xff),
352 (p->fmt.pixelformat >> 8) & 0xff,
353 (p->fmt.pixelformat >> 16) & 0xff,
354 (p->fmt.pixelformat >> 24) & 0xff,
355 p->fmt.bytesperline, p->fmt.sizeimage,
356 p->fmt.colorspace);
357 }
358
359 static void v4l_print_buftype(const void *arg, bool write_only)
360 {
361 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
362 }
363
364 static void v4l_print_modulator(const void *arg, bool write_only)
365 {
366 const struct v4l2_modulator *p = arg;
367
368 if (write_only)
369 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
370 else
371 pr_cont("index=%u, name=%.*s, capability=0x%x, "
372 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
373 p->index, (int)sizeof(p->name), p->name, p->capability,
374 p->rangelow, p->rangehigh, p->txsubchans);
375 }
376
377 static void v4l_print_tuner(const void *arg, bool write_only)
378 {
379 const struct v4l2_tuner *p = arg;
380
381 if (write_only)
382 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
383 else
384 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
385 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
386 "rxsubchans=0x%x, audmode=%u\n",
387 p->index, (int)sizeof(p->name), p->name, p->type,
388 p->capability, p->rangelow,
389 p->rangehigh, p->signal, p->afc,
390 p->rxsubchans, p->audmode);
391 }
392
393 static void v4l_print_frequency(const void *arg, bool write_only)
394 {
395 const struct v4l2_frequency *p = arg;
396
397 pr_cont("tuner=%u, type=%u, frequency=%u\n",
398 p->tuner, p->type, p->frequency);
399 }
400
401 static void v4l_print_standard(const void *arg, bool write_only)
402 {
403 const struct v4l2_standard *p = arg;
404
405 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
406 "framelines=%u\n", p->index,
407 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
408 p->frameperiod.numerator,
409 p->frameperiod.denominator,
410 p->framelines);
411 }
412
413 static void v4l_print_std(const void *arg, bool write_only)
414 {
415 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
416 }
417
418 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
419 {
420 const struct v4l2_hw_freq_seek *p = arg;
421
422 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
423 "rangelow=%u, rangehigh=%u\n",
424 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
425 p->rangelow, p->rangehigh);
426 }
427
428 static void v4l_print_requestbuffers(const void *arg, bool write_only)
429 {
430 const struct v4l2_requestbuffers *p = arg;
431
432 pr_cont("count=%d, type=%s, memory=%s\n",
433 p->count,
434 prt_names(p->type, v4l2_type_names),
435 prt_names(p->memory, v4l2_memory_names));
436 }
437
438 static void v4l_print_buffer(const void *arg, bool write_only)
439 {
440 const struct v4l2_buffer *p = arg;
441 const struct v4l2_timecode *tc = &p->timecode;
442 const struct v4l2_plane *plane;
443 int i;
444
445 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
446 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
447 p->timestamp.tv_sec / 3600,
448 (int)(p->timestamp.tv_sec / 60) % 60,
449 (int)(p->timestamp.tv_sec % 60),
450 (long)p->timestamp.tv_usec,
451 p->index,
452 prt_names(p->type, v4l2_type_names),
453 p->flags, prt_names(p->field, v4l2_field_names),
454 p->sequence, prt_names(p->memory, v4l2_memory_names));
455
456 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
457 pr_cont("\n");
458 for (i = 0; i < p->length; ++i) {
459 plane = &p->m.planes[i];
460 printk(KERN_DEBUG
461 "plane %d: bytesused=%d, data_offset=0x%08x, "
462 "offset/userptr=0x%lx, length=%d\n",
463 i, plane->bytesused, plane->data_offset,
464 plane->m.userptr, plane->length);
465 }
466 } else {
467 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
468 p->bytesused, p->m.userptr, p->length);
469 }
470
471 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
472 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
473 tc->hours, tc->minutes, tc->seconds,
474 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
475 }
476
477 static void v4l_print_exportbuffer(const void *arg, bool write_only)
478 {
479 const struct v4l2_exportbuffer *p = arg;
480
481 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
482 p->fd, prt_names(p->type, v4l2_type_names),
483 p->index, p->plane, p->flags);
484 }
485
486 static void v4l_print_create_buffers(const void *arg, bool write_only)
487 {
488 const struct v4l2_create_buffers *p = arg;
489
490 pr_cont("index=%d, count=%d, memory=%s, ",
491 p->index, p->count,
492 prt_names(p->memory, v4l2_memory_names));
493 v4l_print_format(&p->format, write_only);
494 }
495
496 static void v4l_print_streamparm(const void *arg, bool write_only)
497 {
498 const struct v4l2_streamparm *p = arg;
499
500 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
501
502 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
503 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
504 const struct v4l2_captureparm *c = &p->parm.capture;
505
506 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
507 "extendedmode=%d, readbuffers=%d\n",
508 c->capability, c->capturemode,
509 c->timeperframe.numerator, c->timeperframe.denominator,
510 c->extendedmode, c->readbuffers);
511 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
512 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
513 const struct v4l2_outputparm *c = &p->parm.output;
514
515 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
516 "extendedmode=%d, writebuffers=%d\n",
517 c->capability, c->outputmode,
518 c->timeperframe.numerator, c->timeperframe.denominator,
519 c->extendedmode, c->writebuffers);
520 } else {
521 pr_cont("\n");
522 }
523 }
524
525 static void v4l_print_queryctrl(const void *arg, bool write_only)
526 {
527 const struct v4l2_queryctrl *p = arg;
528
529 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
530 "step=%d, default=%d, flags=0x%08x\n",
531 p->id, p->type, (int)sizeof(p->name), p->name,
532 p->minimum, p->maximum,
533 p->step, p->default_value, p->flags);
534 }
535
536 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
537 {
538 const struct v4l2_query_ext_ctrl *p = arg;
539
540 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, "
541 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, "
542 "nr_of_dims=%u, dims=%u,%u,%u,%u\n",
543 p->id, p->type, (int)sizeof(p->name), p->name,
544 p->minimum, p->maximum,
545 p->step, p->default_value, p->flags,
546 p->elem_size, p->elems, p->nr_of_dims,
547 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
548 }
549
550 static void v4l_print_querymenu(const void *arg, bool write_only)
551 {
552 const struct v4l2_querymenu *p = arg;
553
554 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
555 }
556
557 static void v4l_print_control(const void *arg, bool write_only)
558 {
559 const struct v4l2_control *p = arg;
560
561 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
562 }
563
564 static void v4l_print_ext_controls(const void *arg, bool write_only)
565 {
566 const struct v4l2_ext_controls *p = arg;
567 int i;
568
569 pr_cont("which=0x%x, count=%d, error_idx=%d",
570 p->which, p->count, p->error_idx);
571 for (i = 0; i < p->count; i++) {
572 if (!p->controls[i].size)
573 pr_cont(", id/val=0x%x/0x%x",
574 p->controls[i].id, p->controls[i].value);
575 else
576 pr_cont(", id/size=0x%x/%u",
577 p->controls[i].id, p->controls[i].size);
578 }
579 pr_cont("\n");
580 }
581
582 static void v4l_print_cropcap(const void *arg, bool write_only)
583 {
584 const struct v4l2_cropcap *p = arg;
585
586 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
587 "defrect wxh=%dx%d, x,y=%d,%d, "
588 "pixelaspect %d/%d\n",
589 prt_names(p->type, v4l2_type_names),
590 p->bounds.width, p->bounds.height,
591 p->bounds.left, p->bounds.top,
592 p->defrect.width, p->defrect.height,
593 p->defrect.left, p->defrect.top,
594 p->pixelaspect.numerator, p->pixelaspect.denominator);
595 }
596
597 static void v4l_print_crop(const void *arg, bool write_only)
598 {
599 const struct v4l2_crop *p = arg;
600
601 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
602 prt_names(p->type, v4l2_type_names),
603 p->c.width, p->c.height,
604 p->c.left, p->c.top);
605 }
606
607 static void v4l_print_selection(const void *arg, bool write_only)
608 {
609 const struct v4l2_selection *p = arg;
610
611 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
612 prt_names(p->type, v4l2_type_names),
613 p->target, p->flags,
614 p->r.width, p->r.height, p->r.left, p->r.top);
615 }
616
617 static void v4l_print_jpegcompression(const void *arg, bool write_only)
618 {
619 const struct v4l2_jpegcompression *p = arg;
620
621 pr_cont("quality=%d, APPn=%d, APP_len=%d, "
622 "COM_len=%d, jpeg_markers=0x%x\n",
623 p->quality, p->APPn, p->APP_len,
624 p->COM_len, p->jpeg_markers);
625 }
626
627 static void v4l_print_enc_idx(const void *arg, bool write_only)
628 {
629 const struct v4l2_enc_idx *p = arg;
630
631 pr_cont("entries=%d, entries_cap=%d\n",
632 p->entries, p->entries_cap);
633 }
634
635 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
636 {
637 const struct v4l2_encoder_cmd *p = arg;
638
639 pr_cont("cmd=%d, flags=0x%x\n",
640 p->cmd, p->flags);
641 }
642
643 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
644 {
645 const struct v4l2_decoder_cmd *p = arg;
646
647 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
648
649 if (p->cmd == V4L2_DEC_CMD_START)
650 pr_info("speed=%d, format=%u\n",
651 p->start.speed, p->start.format);
652 else if (p->cmd == V4L2_DEC_CMD_STOP)
653 pr_info("pts=%llu\n", p->stop.pts);
654 }
655
656 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
657 {
658 const struct v4l2_dbg_chip_info *p = arg;
659
660 pr_cont("type=%u, ", p->match.type);
661 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
662 pr_cont("name=%.*s, ",
663 (int)sizeof(p->match.name), p->match.name);
664 else
665 pr_cont("addr=%u, ", p->match.addr);
666 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
667 }
668
669 static void v4l_print_dbg_register(const void *arg, bool write_only)
670 {
671 const struct v4l2_dbg_register *p = arg;
672
673 pr_cont("type=%u, ", p->match.type);
674 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
675 pr_cont("name=%.*s, ",
676 (int)sizeof(p->match.name), p->match.name);
677 else
678 pr_cont("addr=%u, ", p->match.addr);
679 pr_cont("reg=0x%llx, val=0x%llx\n",
680 p->reg, p->val);
681 }
682
683 static void v4l_print_dv_timings(const void *arg, bool write_only)
684 {
685 const struct v4l2_dv_timings *p = arg;
686
687 switch (p->type) {
688 case V4L2_DV_BT_656_1120:
689 pr_cont("type=bt-656/1120, interlaced=%u, "
690 "pixelclock=%llu, "
691 "width=%u, height=%u, polarities=0x%x, "
692 "hfrontporch=%u, hsync=%u, "
693 "hbackporch=%u, vfrontporch=%u, "
694 "vsync=%u, vbackporch=%u, "
695 "il_vfrontporch=%u, il_vsync=%u, "
696 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
697 p->bt.interlaced, p->bt.pixelclock,
698 p->bt.width, p->bt.height,
699 p->bt.polarities, p->bt.hfrontporch,
700 p->bt.hsync, p->bt.hbackporch,
701 p->bt.vfrontporch, p->bt.vsync,
702 p->bt.vbackporch, p->bt.il_vfrontporch,
703 p->bt.il_vsync, p->bt.il_vbackporch,
704 p->bt.standards, p->bt.flags);
705 break;
706 default:
707 pr_cont("type=%d\n", p->type);
708 break;
709 }
710 }
711
712 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
713 {
714 const struct v4l2_enum_dv_timings *p = arg;
715
716 pr_cont("index=%u, ", p->index);
717 v4l_print_dv_timings(&p->timings, write_only);
718 }
719
720 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
721 {
722 const struct v4l2_dv_timings_cap *p = arg;
723
724 switch (p->type) {
725 case V4L2_DV_BT_656_1120:
726 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
727 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
728 p->bt.min_width, p->bt.max_width,
729 p->bt.min_height, p->bt.max_height,
730 p->bt.min_pixelclock, p->bt.max_pixelclock,
731 p->bt.standards, p->bt.capabilities);
732 break;
733 default:
734 pr_cont("type=%u\n", p->type);
735 break;
736 }
737 }
738
739 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
740 {
741 const struct v4l2_frmsizeenum *p = arg;
742
743 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
744 p->index,
745 (p->pixel_format & 0xff),
746 (p->pixel_format >> 8) & 0xff,
747 (p->pixel_format >> 16) & 0xff,
748 (p->pixel_format >> 24) & 0xff,
749 p->type);
750 switch (p->type) {
751 case V4L2_FRMSIZE_TYPE_DISCRETE:
752 pr_cont(", wxh=%ux%u\n",
753 p->discrete.width, p->discrete.height);
754 break;
755 case V4L2_FRMSIZE_TYPE_STEPWISE:
756 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
757 p->stepwise.min_width, p->stepwise.min_height,
758 p->stepwise.step_width, p->stepwise.step_height,
759 p->stepwise.max_width, p->stepwise.max_height);
760 break;
761 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
762 /* fall through */
763 default:
764 pr_cont("\n");
765 break;
766 }
767 }
768
769 static void v4l_print_frmivalenum(const void *arg, bool write_only)
770 {
771 const struct v4l2_frmivalenum *p = arg;
772
773 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
774 p->index,
775 (p->pixel_format & 0xff),
776 (p->pixel_format >> 8) & 0xff,
777 (p->pixel_format >> 16) & 0xff,
778 (p->pixel_format >> 24) & 0xff,
779 p->width, p->height, p->type);
780 switch (p->type) {
781 case V4L2_FRMIVAL_TYPE_DISCRETE:
782 pr_cont(", fps=%d/%d\n",
783 p->discrete.numerator,
784 p->discrete.denominator);
785 break;
786 case V4L2_FRMIVAL_TYPE_STEPWISE:
787 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
788 p->stepwise.min.numerator,
789 p->stepwise.min.denominator,
790 p->stepwise.max.numerator,
791 p->stepwise.max.denominator,
792 p->stepwise.step.numerator,
793 p->stepwise.step.denominator);
794 break;
795 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
796 /* fall through */
797 default:
798 pr_cont("\n");
799 break;
800 }
801 }
802
803 static void v4l_print_event(const void *arg, bool write_only)
804 {
805 const struct v4l2_event *p = arg;
806 const struct v4l2_event_ctrl *c;
807
808 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
809 "timestamp=%lu.%9.9lu\n",
810 p->type, p->pending, p->sequence, p->id,
811 p->timestamp.tv_sec, p->timestamp.tv_nsec);
812 switch (p->type) {
813 case V4L2_EVENT_VSYNC:
814 printk(KERN_DEBUG "field=%s\n",
815 prt_names(p->u.vsync.field, v4l2_field_names));
816 break;
817 case V4L2_EVENT_CTRL:
818 c = &p->u.ctrl;
819 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
820 c->changes, c->type);
821 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
822 pr_cont("value64=%lld, ", c->value64);
823 else
824 pr_cont("value=%d, ", c->value);
825 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, "
826 "default_value=%d\n",
827 c->flags, c->minimum, c->maximum,
828 c->step, c->default_value);
829 break;
830 case V4L2_EVENT_FRAME_SYNC:
831 pr_cont("frame_sequence=%u\n",
832 p->u.frame_sync.frame_sequence);
833 break;
834 }
835 }
836
837 static void v4l_print_event_subscription(const void *arg, bool write_only)
838 {
839 const struct v4l2_event_subscription *p = arg;
840
841 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
842 p->type, p->id, p->flags);
843 }
844
845 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
846 {
847 const struct v4l2_sliced_vbi_cap *p = arg;
848 int i;
849
850 pr_cont("type=%s, service_set=0x%08x\n",
851 prt_names(p->type, v4l2_type_names), p->service_set);
852 for (i = 0; i < 24; i++)
853 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
854 p->service_lines[0][i],
855 p->service_lines[1][i]);
856 }
857
858 static void v4l_print_freq_band(const void *arg, bool write_only)
859 {
860 const struct v4l2_frequency_band *p = arg;
861
862 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
863 "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
864 p->tuner, p->type, p->index,
865 p->capability, p->rangelow,
866 p->rangehigh, p->modulation);
867 }
868
869 static void v4l_print_edid(const void *arg, bool write_only)
870 {
871 const struct v4l2_edid *p = arg;
872
873 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
874 p->pad, p->start_block, p->blocks);
875 }
876
877 static void v4l_print_u32(const void *arg, bool write_only)
878 {
879 pr_cont("value=%u\n", *(const u32 *)arg);
880 }
881
882 static void v4l_print_newline(const void *arg, bool write_only)
883 {
884 pr_cont("\n");
885 }
886
887 static void v4l_print_default(const void *arg, bool write_only)
888 {
889 pr_cont("driver-specific ioctl\n");
890 }
891
892 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
893 {
894 __u32 i;
895
896 /* zero the reserved fields */
897 c->reserved[0] = c->reserved[1] = 0;
898 for (i = 0; i < c->count; i++)
899 c->controls[i].reserved2[0] = 0;
900
901 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
902 when using extended controls.
903 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
904 is it allowed for backwards compatibility.
905 */
906 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
907 return 0;
908 if (!c->which)
909 return 1;
910 /* Check that all controls are from the same control class. */
911 for (i = 0; i < c->count; i++) {
912 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
913 c->error_idx = i;
914 return 0;
915 }
916 }
917 return 1;
918 }
919
920 static int check_fmt(struct file *file, enum v4l2_buf_type type)
921 {
922 struct video_device *vfd = video_devdata(file);
923 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
924 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
925 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
926 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
927 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
928 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
929 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
930
931 if (ops == NULL)
932 return -EINVAL;
933
934 switch (type) {
935 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
936 if ((is_vid || is_tch) && is_rx &&
937 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
938 return 0;
939 break;
940 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
941 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
942 return 0;
943 break;
944 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
945 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
946 return 0;
947 break;
948 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
949 if (is_vid && is_tx &&
950 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
951 return 0;
952 break;
953 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
954 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
955 return 0;
956 break;
957 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
958 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
959 return 0;
960 break;
961 case V4L2_BUF_TYPE_VBI_CAPTURE:
962 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
963 return 0;
964 break;
965 case V4L2_BUF_TYPE_VBI_OUTPUT:
966 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
967 return 0;
968 break;
969 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
970 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
971 return 0;
972 break;
973 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
974 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
975 return 0;
976 break;
977 case V4L2_BUF_TYPE_SDR_CAPTURE:
978 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
979 return 0;
980 break;
981 case V4L2_BUF_TYPE_SDR_OUTPUT:
982 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
983 return 0;
984 break;
985 default:
986 break;
987 }
988 return -EINVAL;
989 }
990
991 static void v4l_sanitize_format(struct v4l2_format *fmt)
992 {
993 unsigned int offset;
994
995 /*
996 * The v4l2_pix_format structure has been extended with fields that were
997 * not previously required to be set to zero by applications. The priv
998 * field, when set to a magic value, indicates the the extended fields
999 * are valid. Otherwise they will contain undefined values. To simplify
1000 * the API towards drivers zero the extended fields and set the priv
1001 * field to the magic value when the extended pixel format structure
1002 * isn't used by applications.
1003 */
1004
1005 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1006 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1007 return;
1008
1009 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1010 return;
1011
1012 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1013
1014 offset = offsetof(struct v4l2_pix_format, priv)
1015 + sizeof(fmt->fmt.pix.priv);
1016 memset(((void *)&fmt->fmt.pix) + offset, 0,
1017 sizeof(fmt->fmt.pix) - offset);
1018 }
1019
1020 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1021 struct file *file, void *fh, void *arg)
1022 {
1023 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1024 struct video_device *vfd = video_devdata(file);
1025 int ret;
1026
1027 cap->version = LINUX_VERSION_CODE;
1028 cap->device_caps = vfd->device_caps;
1029 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1030
1031 ret = ops->vidioc_querycap(file, fh, cap);
1032
1033 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1034 /*
1035 * Drivers MUST fill in device_caps, so check for this and
1036 * warn if it was forgotten.
1037 */
1038 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1039 !cap->device_caps, "Bad caps for driver %s, %x %x",
1040 cap->driver, cap->capabilities, cap->device_caps);
1041 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1042
1043 return ret;
1044 }
1045
1046 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1047 struct file *file, void *fh, void *arg)
1048 {
1049 struct video_device *vfd = video_devdata(file);
1050 int ret;
1051
1052 ret = v4l_enable_media_source(vfd);
1053 if (ret)
1054 return ret;
1055 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1056 }
1057
1058 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1059 struct file *file, void *fh, void *arg)
1060 {
1061 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1062 }
1063
1064 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1065 struct file *file, void *fh, void *arg)
1066 {
1067 struct video_device *vfd;
1068 u32 *p = arg;
1069
1070 vfd = video_devdata(file);
1071 *p = v4l2_prio_max(vfd->prio);
1072 return 0;
1073 }
1074
1075 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1076 struct file *file, void *fh, void *arg)
1077 {
1078 struct video_device *vfd;
1079 struct v4l2_fh *vfh;
1080 u32 *p = arg;
1081
1082 vfd = video_devdata(file);
1083 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1084 return -ENOTTY;
1085 vfh = file->private_data;
1086 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1087 }
1088
1089 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1090 struct file *file, void *fh, void *arg)
1091 {
1092 struct video_device *vfd = video_devdata(file);
1093 struct v4l2_input *p = arg;
1094
1095 /*
1096 * We set the flags for CAP_DV_TIMINGS &
1097 * CAP_STD here based on ioctl handler provided by the
1098 * driver. If the driver doesn't support these
1099 * for a specific input, it must override these flags.
1100 */
1101 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1102 p->capabilities |= V4L2_IN_CAP_STD;
1103
1104 return ops->vidioc_enum_input(file, fh, p);
1105 }
1106
1107 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1108 struct file *file, void *fh, void *arg)
1109 {
1110 struct video_device *vfd = video_devdata(file);
1111 struct v4l2_output *p = arg;
1112
1113 /*
1114 * We set the flags for CAP_DV_TIMINGS &
1115 * CAP_STD here based on ioctl handler provided by the
1116 * driver. If the driver doesn't support these
1117 * for a specific output, it must override these flags.
1118 */
1119 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1120 p->capabilities |= V4L2_OUT_CAP_STD;
1121
1122 return ops->vidioc_enum_output(file, fh, p);
1123 }
1124
1125 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1126 {
1127 const unsigned sz = sizeof(fmt->description);
1128 const char *descr = NULL;
1129 u32 flags = 0;
1130
1131 /*
1132 * We depart from the normal coding style here since the descriptions
1133 * should be aligned so it is easy to see which descriptions will be
1134 * longer than 31 characters (the max length for a description).
1135 * And frankly, this is easier to read anyway.
1136 *
1137 * Note that gcc will use O(log N) comparisons to find the right case.
1138 */
1139 switch (fmt->pixelformat) {
1140 /* Max description length mask: descr = "0123456789012345678901234567890" */
1141 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1142 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1143 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1144 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1145 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1146 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1147 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1148 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1149 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1150 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1151 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1152 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1153 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1154 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1155 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1156 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1157 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1158 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1159 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1160 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1161 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1162 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1163 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1164 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1165 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1166 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1167 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1168 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1169 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1170 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1171 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1172 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1173 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1174 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1175 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1176 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1177 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1178 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1179 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1180 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1181 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1182 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1183 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1184 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1185 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1186 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1187 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1188 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1189 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1190 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1191 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1192 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1193 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1194 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1195 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1196 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1197 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1198 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1199 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1200 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1201 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1202 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1203 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1204 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1205 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1206 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1207 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1208 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1209 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1210 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1211 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1212 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1213 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1214 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1215 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1216 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1217 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1218 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1219 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1220 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1221 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1222 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1223 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1224 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1225 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1226 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1227 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1228 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1229 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1230 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1231 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1232 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1233 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
1234 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1235 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1236 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1237 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1238 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1239 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1240 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1241 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1242 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1243 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1244 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1245 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1246 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1247 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break;
1248 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break;
1249 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break;
1250 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break;
1251
1252 default:
1253 /* Compressed formats */
1254 flags = V4L2_FMT_FLAG_COMPRESSED;
1255 switch (fmt->pixelformat) {
1256 /* Max description length mask: descr = "0123456789012345678901234567890" */
1257 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1258 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1259 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1260 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1261 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1262 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1263 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1264 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1265 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1266 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1267 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break;
1268 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1269 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1270 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1271 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1272 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1273 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1274 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1275 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1276 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1277 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1278 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1279 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1280 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1281 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1282 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1283 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1284 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1285 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1286 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1287 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1288 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1289 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1290 default:
1291 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1292 if (fmt->description[0])
1293 return;
1294 flags = 0;
1295 snprintf(fmt->description, sz, "%c%c%c%c%s",
1296 (char)(fmt->pixelformat & 0x7f),
1297 (char)((fmt->pixelformat >> 8) & 0x7f),
1298 (char)((fmt->pixelformat >> 16) & 0x7f),
1299 (char)((fmt->pixelformat >> 24) & 0x7f),
1300 (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1301 break;
1302 }
1303 }
1304
1305 if (descr)
1306 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1307 fmt->flags = flags;
1308 }
1309
1310 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1311 struct file *file, void *fh, void *arg)
1312 {
1313 struct v4l2_fmtdesc *p = arg;
1314 struct video_device *vfd = video_devdata(file);
1315 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1316 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1317 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1318 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1319 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1320 int ret = -EINVAL;
1321
1322 switch (p->type) {
1323 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1324 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
1325 break;
1326 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1327 break;
1328 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1329 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1330 break;
1331 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1332 break;
1333 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1334 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1335 break;
1336 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1337 break;
1338 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1339 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1340 break;
1341 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1342 break;
1343 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1344 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1345 break;
1346 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1347 break;
1348 case V4L2_BUF_TYPE_SDR_CAPTURE:
1349 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1350 break;
1351 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1352 break;
1353 case V4L2_BUF_TYPE_SDR_OUTPUT:
1354 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1355 break;
1356 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1357 break;
1358 }
1359 if (ret == 0)
1360 v4l_fill_fmtdesc(p);
1361 return ret;
1362 }
1363
1364 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1365 struct file *file, void *fh, void *arg)
1366 {
1367 struct v4l2_format *p = arg;
1368 struct video_device *vfd = video_devdata(file);
1369 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1370 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1371 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1372 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1373 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1374 int ret;
1375
1376 /*
1377 * fmt can't be cleared for these overlay types due to the 'clips'
1378 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1379 * Those are provided by the user. So handle these two overlay types
1380 * first, and then just do a simple memset for the other types.
1381 */
1382 switch (p->type) {
1383 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1384 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1385 struct v4l2_clip __user *clips = p->fmt.win.clips;
1386 u32 clipcount = p->fmt.win.clipcount;
1387 void __user *bitmap = p->fmt.win.bitmap;
1388
1389 memset(&p->fmt, 0, sizeof(p->fmt));
1390 p->fmt.win.clips = clips;
1391 p->fmt.win.clipcount = clipcount;
1392 p->fmt.win.bitmap = bitmap;
1393 break;
1394 }
1395 default:
1396 memset(&p->fmt, 0, sizeof(p->fmt));
1397 break;
1398 }
1399
1400 switch (p->type) {
1401 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1402 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
1403 break;
1404 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1405 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1406 /* just in case the driver zeroed it again */
1407 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1408 return ret;
1409 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1410 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1411 break;
1412 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1413 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1414 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1415 break;
1416 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1417 case V4L2_BUF_TYPE_VBI_CAPTURE:
1418 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1419 break;
1420 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1421 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1422 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1423 break;
1424 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1425 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1426 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1427 break;
1428 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1429 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1430 /* just in case the driver zeroed it again */
1431 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1432 return ret;
1433 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1434 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1435 break;
1436 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1437 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1438 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1439 break;
1440 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1441 case V4L2_BUF_TYPE_VBI_OUTPUT:
1442 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1443 break;
1444 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1445 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1446 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1447 break;
1448 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1449 case V4L2_BUF_TYPE_SDR_CAPTURE:
1450 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1451 break;
1452 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1453 case V4L2_BUF_TYPE_SDR_OUTPUT:
1454 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1455 break;
1456 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1457 }
1458 return -EINVAL;
1459 }
1460
1461 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1462 {
1463 /*
1464 * The v4l2_pix_format structure contains fields that make no sense for
1465 * touch. Set them to default values in this case.
1466 */
1467
1468 p->field = V4L2_FIELD_NONE;
1469 p->colorspace = V4L2_COLORSPACE_RAW;
1470 p->flags = 0;
1471 p->ycbcr_enc = 0;
1472 p->quantization = 0;
1473 p->xfer_func = 0;
1474 }
1475
1476 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1477 struct file *file, void *fh, void *arg)
1478 {
1479 struct v4l2_format *p = arg;
1480 struct video_device *vfd = video_devdata(file);
1481 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1482 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1483 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1484 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1485 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1486 int ret;
1487
1488 ret = v4l_enable_media_source(vfd);
1489 if (ret)
1490 return ret;
1491 v4l_sanitize_format(p);
1492
1493 switch (p->type) {
1494 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1495 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
1496 break;
1497 CLEAR_AFTER_FIELD(p, fmt.pix);
1498 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1499 /* just in case the driver zeroed it again */
1500 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1501 if (is_tch)
1502 v4l_pix_format_touch(&p->fmt.pix);
1503 return ret;
1504 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1505 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1506 break;
1507 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1508 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1509 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1510 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1511 break;
1512 CLEAR_AFTER_FIELD(p, fmt.win);
1513 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1514 case V4L2_BUF_TYPE_VBI_CAPTURE:
1515 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1516 break;
1517 CLEAR_AFTER_FIELD(p, fmt.vbi);
1518 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1519 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1520 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1521 break;
1522 CLEAR_AFTER_FIELD(p, fmt.sliced);
1523 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1524 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1525 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1526 break;
1527 CLEAR_AFTER_FIELD(p, fmt.pix);
1528 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1529 /* just in case the driver zeroed it again */
1530 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1531 return ret;
1532 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1533 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1534 break;
1535 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1536 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1537 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1538 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1539 break;
1540 CLEAR_AFTER_FIELD(p, fmt.win);
1541 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1542 case V4L2_BUF_TYPE_VBI_OUTPUT:
1543 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1544 break;
1545 CLEAR_AFTER_FIELD(p, fmt.vbi);
1546 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1547 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1548 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1549 break;
1550 CLEAR_AFTER_FIELD(p, fmt.sliced);
1551 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1552 case V4L2_BUF_TYPE_SDR_CAPTURE:
1553 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1554 break;
1555 CLEAR_AFTER_FIELD(p, fmt.sdr);
1556 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1557 case V4L2_BUF_TYPE_SDR_OUTPUT:
1558 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1559 break;
1560 CLEAR_AFTER_FIELD(p, fmt.sdr);
1561 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1562 }
1563 return -EINVAL;
1564 }
1565
1566 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1567 struct file *file, void *fh, void *arg)
1568 {
1569 struct v4l2_format *p = arg;
1570 struct video_device *vfd = video_devdata(file);
1571 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1572 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1573 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1574 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1575 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1576 int ret;
1577
1578 v4l_sanitize_format(p);
1579
1580 switch (p->type) {
1581 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1582 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap))
1583 break;
1584 CLEAR_AFTER_FIELD(p, fmt.pix);
1585 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1586 /* just in case the driver zeroed it again */
1587 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1588 return ret;
1589 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1590 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1591 break;
1592 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1593 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1594 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1595 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1596 break;
1597 CLEAR_AFTER_FIELD(p, fmt.win);
1598 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1599 case V4L2_BUF_TYPE_VBI_CAPTURE:
1600 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1601 break;
1602 CLEAR_AFTER_FIELD(p, fmt.vbi);
1603 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1604 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1605 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1606 break;
1607 CLEAR_AFTER_FIELD(p, fmt.sliced);
1608 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1609 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1610 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1611 break;
1612 CLEAR_AFTER_FIELD(p, fmt.pix);
1613 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1614 /* just in case the driver zeroed it again */
1615 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1616 return ret;
1617 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1618 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1619 break;
1620 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1621 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1622 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1623 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1624 break;
1625 CLEAR_AFTER_FIELD(p, fmt.win);
1626 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1627 case V4L2_BUF_TYPE_VBI_OUTPUT:
1628 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1629 break;
1630 CLEAR_AFTER_FIELD(p, fmt.vbi);
1631 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1632 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1633 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1634 break;
1635 CLEAR_AFTER_FIELD(p, fmt.sliced);
1636 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1637 case V4L2_BUF_TYPE_SDR_CAPTURE:
1638 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1639 break;
1640 CLEAR_AFTER_FIELD(p, fmt.sdr);
1641 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1642 case V4L2_BUF_TYPE_SDR_OUTPUT:
1643 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1644 break;
1645 CLEAR_AFTER_FIELD(p, fmt.sdr);
1646 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1647 }
1648 return -EINVAL;
1649 }
1650
1651 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1652 struct file *file, void *fh, void *arg)
1653 {
1654 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1655 }
1656
1657 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1658 struct file *file, void *fh, void *arg)
1659 {
1660 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1661 }
1662
1663 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1664 struct file *file, void *fh, void *arg)
1665 {
1666 struct video_device *vfd = video_devdata(file);
1667 struct v4l2_tuner *p = arg;
1668 int err;
1669
1670 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1671 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1672 err = ops->vidioc_g_tuner(file, fh, p);
1673 if (!err)
1674 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1675 return err;
1676 }
1677
1678 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1679 struct file *file, void *fh, void *arg)
1680 {
1681 struct video_device *vfd = video_devdata(file);
1682 struct v4l2_tuner *p = arg;
1683 int ret;
1684
1685 ret = v4l_enable_media_source(vfd);
1686 if (ret)
1687 return ret;
1688 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1689 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1690 return ops->vidioc_s_tuner(file, fh, p);
1691 }
1692
1693 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1694 struct file *file, void *fh, void *arg)
1695 {
1696 struct video_device *vfd = video_devdata(file);
1697 struct v4l2_modulator *p = arg;
1698 int err;
1699
1700 if (vfd->vfl_type == VFL_TYPE_RADIO)
1701 p->type = V4L2_TUNER_RADIO;
1702
1703 err = ops->vidioc_g_modulator(file, fh, p);
1704 if (!err)
1705 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1706 return err;
1707 }
1708
1709 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1710 struct file *file, void *fh, void *arg)
1711 {
1712 struct video_device *vfd = video_devdata(file);
1713 struct v4l2_modulator *p = arg;
1714
1715 if (vfd->vfl_type == VFL_TYPE_RADIO)
1716 p->type = V4L2_TUNER_RADIO;
1717
1718 return ops->vidioc_s_modulator(file, fh, p);
1719 }
1720
1721 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1722 struct file *file, void *fh, void *arg)
1723 {
1724 struct video_device *vfd = video_devdata(file);
1725 struct v4l2_frequency *p = arg;
1726
1727 if (vfd->vfl_type == VFL_TYPE_SDR)
1728 p->type = V4L2_TUNER_SDR;
1729 else
1730 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1731 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1732 return ops->vidioc_g_frequency(file, fh, p);
1733 }
1734
1735 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1736 struct file *file, void *fh, void *arg)
1737 {
1738 struct video_device *vfd = video_devdata(file);
1739 const struct v4l2_frequency *p = arg;
1740 enum v4l2_tuner_type type;
1741 int ret;
1742
1743 ret = v4l_enable_media_source(vfd);
1744 if (ret)
1745 return ret;
1746 if (vfd->vfl_type == VFL_TYPE_SDR) {
1747 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1748 return -EINVAL;
1749 } else {
1750 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1751 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1752 if (type != p->type)
1753 return -EINVAL;
1754 }
1755 return ops->vidioc_s_frequency(file, fh, p);
1756 }
1757
1758 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1759 struct file *file, void *fh, void *arg)
1760 {
1761 struct video_device *vfd = video_devdata(file);
1762 struct v4l2_standard *p = arg;
1763 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1764 unsigned int index = p->index, i, j = 0;
1765 const char *descr = "";
1766
1767 /* Return -ENODATA if the tvnorms for the current input
1768 or output is 0, meaning that it doesn't support this API. */
1769 if (id == 0)
1770 return -ENODATA;
1771
1772 /* Return norm array in a canonical way */
1773 for (i = 0; i <= index && id; i++) {
1774 /* last std value in the standards array is 0, so this
1775 while always ends there since (id & 0) == 0. */
1776 while ((id & standards[j].std) != standards[j].std)
1777 j++;
1778 curr_id = standards[j].std;
1779 descr = standards[j].descr;
1780 j++;
1781 if (curr_id == 0)
1782 break;
1783 if (curr_id != V4L2_STD_PAL &&
1784 curr_id != V4L2_STD_SECAM &&
1785 curr_id != V4L2_STD_NTSC)
1786 id &= ~curr_id;
1787 }
1788 if (i <= index)
1789 return -EINVAL;
1790
1791 v4l2_video_std_construct(p, curr_id, descr);
1792 return 0;
1793 }
1794
1795 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1796 struct file *file, void *fh, void *arg)
1797 {
1798 struct video_device *vfd = video_devdata(file);
1799 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1800 int ret;
1801
1802 ret = v4l_enable_media_source(vfd);
1803 if (ret)
1804 return ret;
1805 norm = id & vfd->tvnorms;
1806 if (vfd->tvnorms && !norm) /* Check if std is supported */
1807 return -EINVAL;
1808
1809 /* Calls the specific handler */
1810 return ops->vidioc_s_std(file, fh, norm);
1811 }
1812
1813 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1814 struct file *file, void *fh, void *arg)
1815 {
1816 struct video_device *vfd = video_devdata(file);
1817 v4l2_std_id *p = arg;
1818 int ret;
1819
1820 ret = v4l_enable_media_source(vfd);
1821 if (ret)
1822 return ret;
1823 /*
1824 * If no signal is detected, then the driver should return
1825 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1826 * any standards that do not apply removed.
1827 *
1828 * This means that tuners, audio and video decoders can join
1829 * their efforts to improve the standards detection.
1830 */
1831 *p = vfd->tvnorms;
1832 return ops->vidioc_querystd(file, fh, arg);
1833 }
1834
1835 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1836 struct file *file, void *fh, void *arg)
1837 {
1838 struct video_device *vfd = video_devdata(file);
1839 struct v4l2_hw_freq_seek *p = arg;
1840 enum v4l2_tuner_type type;
1841 int ret;
1842
1843 ret = v4l_enable_media_source(vfd);
1844 if (ret)
1845 return ret;
1846 /* s_hw_freq_seek is not supported for SDR for now */
1847 if (vfd->vfl_type == VFL_TYPE_SDR)
1848 return -EINVAL;
1849
1850 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1851 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1852 if (p->type != type)
1853 return -EINVAL;
1854 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1855 }
1856
1857 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1858 struct file *file, void *fh, void *arg)
1859 {
1860 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1861 }
1862
1863 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1864 struct file *file, void *fh, void *arg)
1865 {
1866 struct v4l2_requestbuffers *p = arg;
1867 int ret = check_fmt(file, p->type);
1868
1869 if (ret)
1870 return ret;
1871
1872 CLEAR_AFTER_FIELD(p, memory);
1873
1874 return ops->vidioc_reqbufs(file, fh, p);
1875 }
1876
1877 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1878 struct file *file, void *fh, void *arg)
1879 {
1880 struct v4l2_buffer *p = arg;
1881 int ret = check_fmt(file, p->type);
1882
1883 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1884 }
1885
1886 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1887 struct file *file, void *fh, void *arg)
1888 {
1889 struct v4l2_buffer *p = arg;
1890 int ret = check_fmt(file, p->type);
1891
1892 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1893 }
1894
1895 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1896 struct file *file, void *fh, void *arg)
1897 {
1898 struct v4l2_buffer *p = arg;
1899 int ret = check_fmt(file, p->type);
1900
1901 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1902 }
1903
1904 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1905 struct file *file, void *fh, void *arg)
1906 {
1907 struct v4l2_create_buffers *create = arg;
1908 int ret = check_fmt(file, create->format.type);
1909
1910 if (ret)
1911 return ret;
1912
1913 CLEAR_AFTER_FIELD(create, format);
1914
1915 v4l_sanitize_format(&create->format);
1916
1917 ret = ops->vidioc_create_bufs(file, fh, create);
1918
1919 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1920 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1921 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1922
1923 return ret;
1924 }
1925
1926 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1927 struct file *file, void *fh, void *arg)
1928 {
1929 struct v4l2_buffer *b = arg;
1930 int ret = check_fmt(file, b->type);
1931
1932 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1933 }
1934
1935 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1936 struct file *file, void *fh, void *arg)
1937 {
1938 struct v4l2_streamparm *p = arg;
1939 v4l2_std_id std;
1940 int ret = check_fmt(file, p->type);
1941
1942 if (ret)
1943 return ret;
1944 if (ops->vidioc_g_parm)
1945 return ops->vidioc_g_parm(file, fh, p);
1946 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1947 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1948 return -EINVAL;
1949 p->parm.capture.readbuffers = 2;
1950 ret = ops->vidioc_g_std(file, fh, &std);
1951 if (ret == 0)
1952 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1953 return ret;
1954 }
1955
1956 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1957 struct file *file, void *fh, void *arg)
1958 {
1959 struct v4l2_streamparm *p = arg;
1960 int ret = check_fmt(file, p->type);
1961
1962 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1963 }
1964
1965 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1966 struct file *file, void *fh, void *arg)
1967 {
1968 struct video_device *vfd = video_devdata(file);
1969 struct v4l2_queryctrl *p = arg;
1970 struct v4l2_fh *vfh =
1971 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1972
1973 if (vfh && vfh->ctrl_handler)
1974 return v4l2_queryctrl(vfh->ctrl_handler, p);
1975 if (vfd->ctrl_handler)
1976 return v4l2_queryctrl(vfd->ctrl_handler, p);
1977 if (ops->vidioc_queryctrl)
1978 return ops->vidioc_queryctrl(file, fh, p);
1979 return -ENOTTY;
1980 }
1981
1982 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1983 struct file *file, void *fh, void *arg)
1984 {
1985 struct video_device *vfd = video_devdata(file);
1986 struct v4l2_query_ext_ctrl *p = arg;
1987 struct v4l2_fh *vfh =
1988 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1989
1990 if (vfh && vfh->ctrl_handler)
1991 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1992 if (vfd->ctrl_handler)
1993 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1994 if (ops->vidioc_query_ext_ctrl)
1995 return ops->vidioc_query_ext_ctrl(file, fh, p);
1996 return -ENOTTY;
1997 }
1998
1999 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2000 struct file *file, void *fh, void *arg)
2001 {
2002 struct video_device *vfd = video_devdata(file);
2003 struct v4l2_querymenu *p = arg;
2004 struct v4l2_fh *vfh =
2005 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2006
2007 if (vfh && vfh->ctrl_handler)
2008 return v4l2_querymenu(vfh->ctrl_handler, p);
2009 if (vfd->ctrl_handler)
2010 return v4l2_querymenu(vfd->ctrl_handler, p);
2011 if (ops->vidioc_querymenu)
2012 return ops->vidioc_querymenu(file, fh, p);
2013 return -ENOTTY;
2014 }
2015
2016 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2017 struct file *file, void *fh, void *arg)
2018 {
2019 struct video_device *vfd = video_devdata(file);
2020 struct v4l2_control *p = arg;
2021 struct v4l2_fh *vfh =
2022 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2023 struct v4l2_ext_controls ctrls;
2024 struct v4l2_ext_control ctrl;
2025
2026 if (vfh && vfh->ctrl_handler)
2027 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2028 if (vfd->ctrl_handler)
2029 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2030 if (ops->vidioc_g_ctrl)
2031 return ops->vidioc_g_ctrl(file, fh, p);
2032 if (ops->vidioc_g_ext_ctrls == NULL)
2033 return -ENOTTY;
2034
2035 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2036 ctrls.count = 1;
2037 ctrls.controls = &ctrl;
2038 ctrl.id = p->id;
2039 ctrl.value = p->value;
2040 if (check_ext_ctrls(&ctrls, 1)) {
2041 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2042
2043 if (ret == 0)
2044 p->value = ctrl.value;
2045 return ret;
2046 }
2047 return -EINVAL;
2048 }
2049
2050 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2051 struct file *file, void *fh, void *arg)
2052 {
2053 struct video_device *vfd = video_devdata(file);
2054 struct v4l2_control *p = arg;
2055 struct v4l2_fh *vfh =
2056 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2057 struct v4l2_ext_controls ctrls;
2058 struct v4l2_ext_control ctrl;
2059
2060 if (vfh && vfh->ctrl_handler)
2061 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2062 if (vfd->ctrl_handler)
2063 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2064 if (ops->vidioc_s_ctrl)
2065 return ops->vidioc_s_ctrl(file, fh, p);
2066 if (ops->vidioc_s_ext_ctrls == NULL)
2067 return -ENOTTY;
2068
2069 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2070 ctrls.count = 1;
2071 ctrls.controls = &ctrl;
2072 ctrl.id = p->id;
2073 ctrl.value = p->value;
2074 if (check_ext_ctrls(&ctrls, 1))
2075 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2076 return -EINVAL;
2077 }
2078
2079 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2080 struct file *file, void *fh, void *arg)
2081 {
2082 struct video_device *vfd = video_devdata(file);
2083 struct v4l2_ext_controls *p = arg;
2084 struct v4l2_fh *vfh =
2085 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2086
2087 p->error_idx = p->count;
2088 if (vfh && vfh->ctrl_handler)
2089 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2090 if (vfd->ctrl_handler)
2091 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2092 if (ops->vidioc_g_ext_ctrls == NULL)
2093 return -ENOTTY;
2094 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2095 -EINVAL;
2096 }
2097
2098 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2099 struct file *file, void *fh, void *arg)
2100 {
2101 struct video_device *vfd = video_devdata(file);
2102 struct v4l2_ext_controls *p = arg;
2103 struct v4l2_fh *vfh =
2104 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2105
2106 p->error_idx = p->count;
2107 if (vfh && vfh->ctrl_handler)
2108 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2109 if (vfd->ctrl_handler)
2110 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2111 if (ops->vidioc_s_ext_ctrls == NULL)
2112 return -ENOTTY;
2113 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2114 -EINVAL;
2115 }
2116
2117 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2118 struct file *file, void *fh, void *arg)
2119 {
2120 struct video_device *vfd = video_devdata(file);
2121 struct v4l2_ext_controls *p = arg;
2122 struct v4l2_fh *vfh =
2123 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2124
2125 p->error_idx = p->count;
2126 if (vfh && vfh->ctrl_handler)
2127 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2128 if (vfd->ctrl_handler)
2129 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2130 if (ops->vidioc_try_ext_ctrls == NULL)
2131 return -ENOTTY;
2132 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2133 -EINVAL;
2134 }
2135
2136 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2137 struct file *file, void *fh, void *arg)
2138 {
2139 struct v4l2_crop *p = arg;
2140 struct v4l2_selection s = {
2141 .type = p->type,
2142 };
2143 int ret;
2144
2145 if (ops->vidioc_g_crop)
2146 return ops->vidioc_g_crop(file, fh, p);
2147 /* simulate capture crop using selection api */
2148
2149 /* crop means compose for output devices */
2150 if (V4L2_TYPE_IS_OUTPUT(p->type))
2151 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2152 else
2153 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2154
2155 ret = ops->vidioc_g_selection(file, fh, &s);
2156
2157 /* copying results to old structure on success */
2158 if (!ret)
2159 p->c = s.r;
2160 return ret;
2161 }
2162
2163 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2164 struct file *file, void *fh, void *arg)
2165 {
2166 struct v4l2_crop *p = arg;
2167 struct v4l2_selection s = {
2168 .type = p->type,
2169 .r = p->c,
2170 };
2171
2172 if (ops->vidioc_s_crop)
2173 return ops->vidioc_s_crop(file, fh, p);
2174 /* simulate capture crop using selection api */
2175
2176 /* crop means compose for output devices */
2177 if (V4L2_TYPE_IS_OUTPUT(p->type))
2178 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2179 else
2180 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2181
2182 return ops->vidioc_s_selection(file, fh, &s);
2183 }
2184
2185 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2186 struct file *file, void *fh, void *arg)
2187 {
2188 struct v4l2_cropcap *p = arg;
2189 struct v4l2_selection s = { .type = p->type };
2190 int ret = 0;
2191
2192 /* setting trivial pixelaspect */
2193 p->pixelaspect.numerator = 1;
2194 p->pixelaspect.denominator = 1;
2195
2196 /*
2197 * The determine_valid_ioctls() call already should ensure
2198 * that this can never happen, but just in case...
2199 */
2200 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2201 return -ENOTTY;
2202
2203 if (ops->vidioc_cropcap)
2204 ret = ops->vidioc_cropcap(file, fh, p);
2205
2206 if (!ops->vidioc_g_selection)
2207 return ret;
2208
2209 /*
2210 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2211 * square pixel aspect ratio in that case.
2212 */
2213 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2214 return ret;
2215
2216 /* Use g_selection() to fill in the bounds and defrect rectangles */
2217
2218 /* obtaining bounds */
2219 if (V4L2_TYPE_IS_OUTPUT(p->type))
2220 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2221 else
2222 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2223
2224 ret = ops->vidioc_g_selection(file, fh, &s);
2225 if (ret)
2226 return ret;
2227 p->bounds = s.r;
2228
2229 /* obtaining defrect */
2230 if (V4L2_TYPE_IS_OUTPUT(p->type))
2231 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2232 else
2233 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2234
2235 ret = ops->vidioc_g_selection(file, fh, &s);
2236 if (ret)
2237 return ret;
2238 p->defrect = s.r;
2239
2240 return 0;
2241 }
2242
2243 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2244 struct file *file, void *fh, void *arg)
2245 {
2246 struct video_device *vfd = video_devdata(file);
2247 int ret;
2248
2249 if (vfd->v4l2_dev)
2250 pr_info("%s: ================= START STATUS =================\n",
2251 vfd->v4l2_dev->name);
2252 ret = ops->vidioc_log_status(file, fh);
2253 if (vfd->v4l2_dev)
2254 pr_info("%s: ================== END STATUS ==================\n",
2255 vfd->v4l2_dev->name);
2256 return ret;
2257 }
2258
2259 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2260 struct file *file, void *fh, void *arg)
2261 {
2262 #ifdef CONFIG_VIDEO_ADV_DEBUG
2263 struct v4l2_dbg_register *p = arg;
2264 struct video_device *vfd = video_devdata(file);
2265 struct v4l2_subdev *sd;
2266 int idx = 0;
2267
2268 if (!capable(CAP_SYS_ADMIN))
2269 return -EPERM;
2270 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2271 if (vfd->v4l2_dev == NULL)
2272 return -EINVAL;
2273 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2274 if (p->match.addr == idx++)
2275 return v4l2_subdev_call(sd, core, g_register, p);
2276 return -EINVAL;
2277 }
2278 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2279 (ops->vidioc_g_chip_info || p->match.addr == 0))
2280 return ops->vidioc_g_register(file, fh, p);
2281 return -EINVAL;
2282 #else
2283 return -ENOTTY;
2284 #endif
2285 }
2286
2287 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2288 struct file *file, void *fh, void *arg)
2289 {
2290 #ifdef CONFIG_VIDEO_ADV_DEBUG
2291 const struct v4l2_dbg_register *p = arg;
2292 struct video_device *vfd = video_devdata(file);
2293 struct v4l2_subdev *sd;
2294 int idx = 0;
2295
2296 if (!capable(CAP_SYS_ADMIN))
2297 return -EPERM;
2298 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2299 if (vfd->v4l2_dev == NULL)
2300 return -EINVAL;
2301 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2302 if (p->match.addr == idx++)
2303 return v4l2_subdev_call(sd, core, s_register, p);
2304 return -EINVAL;
2305 }
2306 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2307 (ops->vidioc_g_chip_info || p->match.addr == 0))
2308 return ops->vidioc_s_register(file, fh, p);
2309 return -EINVAL;
2310 #else
2311 return -ENOTTY;
2312 #endif
2313 }
2314
2315 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2316 struct file *file, void *fh, void *arg)
2317 {
2318 #ifdef CONFIG_VIDEO_ADV_DEBUG
2319 struct video_device *vfd = video_devdata(file);
2320 struct v4l2_dbg_chip_info *p = arg;
2321 struct v4l2_subdev *sd;
2322 int idx = 0;
2323
2324 switch (p->match.type) {
2325 case V4L2_CHIP_MATCH_BRIDGE:
2326 if (ops->vidioc_s_register)
2327 p->flags |= V4L2_CHIP_FL_WRITABLE;
2328 if (ops->vidioc_g_register)
2329 p->flags |= V4L2_CHIP_FL_READABLE;
2330 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2331 if (ops->vidioc_g_chip_info)
2332 return ops->vidioc_g_chip_info(file, fh, arg);
2333 if (p->match.addr)
2334 return -EINVAL;
2335 return 0;
2336
2337 case V4L2_CHIP_MATCH_SUBDEV:
2338 if (vfd->v4l2_dev == NULL)
2339 break;
2340 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2341 if (p->match.addr != idx++)
2342 continue;
2343 if (sd->ops->core && sd->ops->core->s_register)
2344 p->flags |= V4L2_CHIP_FL_WRITABLE;
2345 if (sd->ops->core && sd->ops->core->g_register)
2346 p->flags |= V4L2_CHIP_FL_READABLE;
2347 strlcpy(p->name, sd->name, sizeof(p->name));
2348 return 0;
2349 }
2350 break;
2351 }
2352 return -EINVAL;
2353 #else
2354 return -ENOTTY;
2355 #endif
2356 }
2357
2358 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2359 struct file *file, void *fh, void *arg)
2360 {
2361 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2362 }
2363
2364 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2365 struct file *file, void *fh, void *arg)
2366 {
2367 return ops->vidioc_subscribe_event(fh, arg);
2368 }
2369
2370 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2371 struct file *file, void *fh, void *arg)
2372 {
2373 return ops->vidioc_unsubscribe_event(fh, arg);
2374 }
2375
2376 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2377 struct file *file, void *fh, void *arg)
2378 {
2379 struct v4l2_sliced_vbi_cap *p = arg;
2380 int ret = check_fmt(file, p->type);
2381
2382 if (ret)
2383 return ret;
2384
2385 /* Clear up to type, everything after type is zeroed already */
2386 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2387
2388 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2389 }
2390
2391 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2392 struct file *file, void *fh, void *arg)
2393 {
2394 struct video_device *vfd = video_devdata(file);
2395 struct v4l2_frequency_band *p = arg;
2396 enum v4l2_tuner_type type;
2397 int err;
2398
2399 if (vfd->vfl_type == VFL_TYPE_SDR) {
2400 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2401 return -EINVAL;
2402 type = p->type;
2403 } else {
2404 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2405 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2406 if (type != p->type)
2407 return -EINVAL;
2408 }
2409 if (ops->vidioc_enum_freq_bands) {
2410 err = ops->vidioc_enum_freq_bands(file, fh, p);
2411 if (err != -ENOTTY)
2412 return err;
2413 }
2414 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2415 struct v4l2_tuner t = {
2416 .index = p->tuner,
2417 .type = type,
2418 };
2419
2420 if (p->index)
2421 return -EINVAL;
2422 err = ops->vidioc_g_tuner(file, fh, &t);
2423 if (err)
2424 return err;
2425 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2426 p->rangelow = t.rangelow;
2427 p->rangehigh = t.rangehigh;
2428 p->modulation = (type == V4L2_TUNER_RADIO) ?
2429 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2430 return 0;
2431 }
2432 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2433 struct v4l2_modulator m = {
2434 .index = p->tuner,
2435 };
2436
2437 if (type != V4L2_TUNER_RADIO)
2438 return -EINVAL;
2439 if (p->index)
2440 return -EINVAL;
2441 err = ops->vidioc_g_modulator(file, fh, &m);
2442 if (err)
2443 return err;
2444 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2445 p->rangelow = m.rangelow;
2446 p->rangehigh = m.rangehigh;
2447 p->modulation = (type == V4L2_TUNER_RADIO) ?
2448 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2449 return 0;
2450 }
2451 return -ENOTTY;
2452 }
2453
2454 struct v4l2_ioctl_info {
2455 unsigned int ioctl;
2456 u32 flags;
2457 const char * const name;
2458 union {
2459 u32 offset;
2460 int (*func)(const struct v4l2_ioctl_ops *ops,
2461 struct file *file, void *fh, void *p);
2462 } u;
2463 void (*debug)(const void *arg, bool write_only);
2464 };
2465
2466 /* This control needs a priority check */
2467 #define INFO_FL_PRIO (1 << 0)
2468 /* This control can be valid if the filehandle passes a control handler. */
2469 #define INFO_FL_CTRL (1 << 1)
2470 /* This is a standard ioctl, no need for special code */
2471 #define INFO_FL_STD (1 << 2)
2472 /* This is ioctl has its own function */
2473 #define INFO_FL_FUNC (1 << 3)
2474 /* Queuing ioctl */
2475 #define INFO_FL_QUEUE (1 << 4)
2476 /* Zero struct from after the field to the end */
2477 #define INFO_FL_CLEAR(v4l2_struct, field) \
2478 ((offsetof(struct v4l2_struct, field) + \
2479 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2480 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2481
2482 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
2483 [_IOC_NR(_ioctl)] = { \
2484 .ioctl = _ioctl, \
2485 .flags = _flags | INFO_FL_STD, \
2486 .name = #_ioctl, \
2487 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
2488 .debug = _debug, \
2489 }
2490
2491 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
2492 [_IOC_NR(_ioctl)] = { \
2493 .ioctl = _ioctl, \
2494 .flags = _flags | INFO_FL_FUNC, \
2495 .name = #_ioctl, \
2496 .u.func = _func, \
2497 .debug = _debug, \
2498 }
2499
2500 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2501 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2502 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2503 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2504 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2505 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2506 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2507 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2508 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2509 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2510 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2511 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2512 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2513 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2514 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2515 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2516 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2517 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2518 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2519 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2520 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2521 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2522 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2523 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2524 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2525 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2526 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2527 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2528 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2529 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2530 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2531 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2532 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2533 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2534 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2535 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2536 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2537 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2538 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2539 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2540 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2541 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2542 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2543 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2544 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2545 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2546 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2547 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2548 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2549 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2550 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2551 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2552 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2553 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2554 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2555 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)),
2556 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2557 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2558 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2559 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2560 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2561 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2562 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2563 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2564 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2565 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2566 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2567 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2568 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2569 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2570 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2571 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2572 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2573 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2574 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2575 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2576 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2577 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2578 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2579 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2580 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2581 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)),
2582 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)),
2583 };
2584 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2585
2586 bool v4l2_is_known_ioctl(unsigned int cmd)
2587 {
2588 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2589 return false;
2590 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2591 }
2592
2593 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2594 {
2595 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2596 return vdev->lock;
2597 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2598 return NULL;
2599 if (vdev->queue && vdev->queue->lock &&
2600 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2601 return vdev->queue->lock;
2602 return vdev->lock;
2603 }
2604
2605 /* Common ioctl debug function. This function can be used by
2606 external ioctl messages as well as internal V4L ioctl */
2607 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2608 {
2609 const char *dir, *type;
2610
2611 if (prefix)
2612 printk(KERN_DEBUG "%s: ", prefix);
2613
2614 switch (_IOC_TYPE(cmd)) {
2615 case 'd':
2616 type = "v4l2_int";
2617 break;
2618 case 'V':
2619 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2620 type = "v4l2";
2621 break;
2622 }
2623 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2624 return;
2625 default:
2626 type = "unknown";
2627 break;
2628 }
2629
2630 switch (_IOC_DIR(cmd)) {
2631 case _IOC_NONE: dir = "--"; break;
2632 case _IOC_READ: dir = "r-"; break;
2633 case _IOC_WRITE: dir = "-w"; break;
2634 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2635 default: dir = "*ERR*"; break;
2636 }
2637 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2638 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2639 }
2640 EXPORT_SYMBOL(v4l_printk_ioctl);
2641
2642 static long __video_do_ioctl(struct file *file,
2643 unsigned int cmd, void *arg)
2644 {
2645 struct video_device *vfd = video_devdata(file);
2646 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2647 bool write_only = false;
2648 struct v4l2_ioctl_info default_info;
2649 const struct v4l2_ioctl_info *info;
2650 void *fh = file->private_data;
2651 struct v4l2_fh *vfh = NULL;
2652 int dev_debug = vfd->dev_debug;
2653 long ret = -ENOTTY;
2654
2655 if (ops == NULL) {
2656 pr_warn("%s: has no ioctl_ops.\n",
2657 video_device_node_name(vfd));
2658 return ret;
2659 }
2660
2661 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2662 vfh = file->private_data;
2663
2664 if (v4l2_is_known_ioctl(cmd)) {
2665 info = &v4l2_ioctls[_IOC_NR(cmd)];
2666
2667 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2668 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2669 goto done;
2670
2671 if (vfh && (info->flags & INFO_FL_PRIO)) {
2672 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2673 if (ret)
2674 goto done;
2675 }
2676 } else {
2677 default_info.ioctl = cmd;
2678 default_info.flags = 0;
2679 default_info.debug = v4l_print_default;
2680 info = &default_info;
2681 }
2682
2683 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2684 if (info->flags & INFO_FL_STD) {
2685 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2686 const void *p = vfd->ioctl_ops;
2687 const vidioc_op *vidioc = p + info->u.offset;
2688
2689 ret = (*vidioc)(file, fh, arg);
2690 } else if (info->flags & INFO_FL_FUNC) {
2691 ret = info->u.func(ops, file, fh, arg);
2692 } else if (!ops->vidioc_default) {
2693 ret = -ENOTTY;
2694 } else {
2695 ret = ops->vidioc_default(file, fh,
2696 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2697 cmd, arg);
2698 }
2699
2700 done:
2701 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2702 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2703 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2704 return ret;
2705
2706 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2707 if (ret < 0)
2708 pr_cont(": error %ld", ret);
2709 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2710 pr_cont("\n");
2711 else if (_IOC_DIR(cmd) == _IOC_NONE)
2712 info->debug(arg, write_only);
2713 else {
2714 pr_cont(": ");
2715 info->debug(arg, write_only);
2716 }
2717 }
2718
2719 return ret;
2720 }
2721
2722 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2723 void __user **user_ptr, void ***kernel_ptr)
2724 {
2725 int ret = 0;
2726
2727 switch (cmd) {
2728 case VIDIOC_PREPARE_BUF:
2729 case VIDIOC_QUERYBUF:
2730 case VIDIOC_QBUF:
2731 case VIDIOC_DQBUF: {
2732 struct v4l2_buffer *buf = parg;
2733
2734 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2735 if (buf->length > VIDEO_MAX_PLANES) {
2736 ret = -EINVAL;
2737 break;
2738 }
2739 *user_ptr = (void __user *)buf->m.planes;
2740 *kernel_ptr = (void **)&buf->m.planes;
2741 *array_size = sizeof(struct v4l2_plane) * buf->length;
2742 ret = 1;
2743 }
2744 break;
2745 }
2746
2747 case VIDIOC_G_EDID:
2748 case VIDIOC_S_EDID: {
2749 struct v4l2_edid *edid = parg;
2750
2751 if (edid->blocks) {
2752 if (edid->blocks > 256) {
2753 ret = -EINVAL;
2754 break;
2755 }
2756 *user_ptr = (void __user *)edid->edid;
2757 *kernel_ptr = (void **)&edid->edid;
2758 *array_size = edid->blocks * 128;
2759 ret = 1;
2760 }
2761 break;
2762 }
2763
2764 case VIDIOC_S_EXT_CTRLS:
2765 case VIDIOC_G_EXT_CTRLS:
2766 case VIDIOC_TRY_EXT_CTRLS: {
2767 struct v4l2_ext_controls *ctrls = parg;
2768
2769 if (ctrls->count != 0) {
2770 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2771 ret = -EINVAL;
2772 break;
2773 }
2774 *user_ptr = (void __user *)ctrls->controls;
2775 *kernel_ptr = (void **)&ctrls->controls;
2776 *array_size = sizeof(struct v4l2_ext_control)
2777 * ctrls->count;
2778 ret = 1;
2779 }
2780 break;
2781 }
2782 }
2783
2784 return ret;
2785 }
2786
2787 long
2788 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2789 v4l2_kioctl func)
2790 {
2791 char sbuf[128];
2792 void *mbuf = NULL;
2793 void *parg = (void *)arg;
2794 long err = -EINVAL;
2795 bool has_array_args;
2796 size_t array_size = 0;
2797 void __user *user_ptr = NULL;
2798 void **kernel_ptr = NULL;
2799
2800 /* Copy arguments into temp kernel buffer */
2801 if (_IOC_DIR(cmd) != _IOC_NONE) {
2802 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2803 parg = sbuf;
2804 } else {
2805 /* too big to allocate from stack */
2806 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2807 if (NULL == mbuf)
2808 return -ENOMEM;
2809 parg = mbuf;
2810 }
2811
2812 err = -EFAULT;
2813 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2814 unsigned int n = _IOC_SIZE(cmd);
2815
2816 /*
2817 * In some cases, only a few fields are used as input,
2818 * i.e. when the app sets "index" and then the driver
2819 * fills in the rest of the structure for the thing
2820 * with that index. We only need to copy up the first
2821 * non-input field.
2822 */
2823 if (v4l2_is_known_ioctl(cmd)) {
2824 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2825 if (flags & INFO_FL_CLEAR_MASK)
2826 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2827 }
2828
2829 if (copy_from_user(parg, (void __user *)arg, n))
2830 goto out;
2831
2832 /* zero out anything we don't copy from userspace */
2833 if (n < _IOC_SIZE(cmd))
2834 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2835 } else {
2836 /* read-only ioctl */
2837 memset(parg, 0, _IOC_SIZE(cmd));
2838 }
2839 }
2840
2841 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2842 if (err < 0)
2843 goto out;
2844 has_array_args = err;
2845
2846 if (has_array_args) {
2847 /*
2848 * When adding new types of array args, make sure that the
2849 * parent argument to ioctl (which contains the pointer to the
2850 * array) fits into sbuf (so that mbuf will still remain
2851 * unused up to here).
2852 */
2853 mbuf = kmalloc(array_size, GFP_KERNEL);
2854 err = -ENOMEM;
2855 if (NULL == mbuf)
2856 goto out_array_args;
2857 err = -EFAULT;
2858 if (copy_from_user(mbuf, user_ptr, array_size))
2859 goto out_array_args;
2860 *kernel_ptr = mbuf;
2861 }
2862
2863 /* Handles IOCTL */
2864 err = func(file, cmd, parg);
2865 if (err == -ENOIOCTLCMD)
2866 err = -ENOTTY;
2867 if (err == 0) {
2868 if (cmd == VIDIOC_DQBUF)
2869 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2870 else if (cmd == VIDIOC_QBUF)
2871 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2872 }
2873
2874 if (has_array_args) {
2875 *kernel_ptr = (void __force *)user_ptr;
2876 if (copy_to_user(user_ptr, mbuf, array_size))
2877 err = -EFAULT;
2878 goto out_array_args;
2879 }
2880 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2881 results that must be returned. */
2882 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2883 goto out;
2884
2885 out_array_args:
2886 /* Copy results into user buffer */
2887 switch (_IOC_DIR(cmd)) {
2888 case _IOC_READ:
2889 case (_IOC_WRITE | _IOC_READ):
2890 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2891 err = -EFAULT;
2892 break;
2893 }
2894
2895 out:
2896 kfree(mbuf);
2897 return err;
2898 }
2899 EXPORT_SYMBOL(video_usercopy);
2900
2901 long video_ioctl2(struct file *file,
2902 unsigned int cmd, unsigned long arg)
2903 {
2904 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2905 }
2906 EXPORT_SYMBOL(video_ioctl2);
Linux kernel - Deliverables
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