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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / v4l2-core / v4l2-ioctl.c
blob170dd68d27f40176758950f4a999b811e231d914
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_rx = vfd->vfl_dir != VFL_DIR_TX;
928 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
929
930 if (ops == NULL)
931 return -EINVAL;
932
933 switch (type) {
934 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
935 if (is_vid && is_rx &&
936 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
937 return 0;
938 break;
939 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
940 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
941 return 0;
942 break;
943 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
944 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
945 return 0;
946 break;
947 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
948 if (is_vid && is_tx &&
949 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
950 return 0;
951 break;
952 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
953 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
954 return 0;
955 break;
956 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
957 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
958 return 0;
959 break;
960 case V4L2_BUF_TYPE_VBI_CAPTURE:
961 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
962 return 0;
963 break;
964 case V4L2_BUF_TYPE_VBI_OUTPUT:
965 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
966 return 0;
967 break;
968 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
969 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
970 return 0;
971 break;
972 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
973 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
974 return 0;
975 break;
976 case V4L2_BUF_TYPE_SDR_CAPTURE:
977 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
978 return 0;
979 break;
980 case V4L2_BUF_TYPE_SDR_OUTPUT:
981 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
982 return 0;
983 break;
984 default:
985 break;
986 }
987 return -EINVAL;
988 }
989
990 static void v4l_sanitize_format(struct v4l2_format *fmt)
991 {
992 unsigned int offset;
993
994 /*
995 * The v4l2_pix_format structure has been extended with fields that were
996 * not previously required to be set to zero by applications. The priv
997 * field, when set to a magic value, indicates the the extended fields
998 * are valid. Otherwise they will contain undefined values. To simplify
999 * the API towards drivers zero the extended fields and set the priv
1000 * field to the magic value when the extended pixel format structure
1001 * isn't used by applications.
1002 */
1003
1004 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1005 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1006 return;
1007
1008 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1009 return;
1010
1011 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1012
1013 offset = offsetof(struct v4l2_pix_format, priv)
1014 + sizeof(fmt->fmt.pix.priv);
1015 memset(((void *)&fmt->fmt.pix) + offset, 0,
1016 sizeof(fmt->fmt.pix) - offset);
1017 }
1018
1019 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1020 struct file *file, void *fh, void *arg)
1021 {
1022 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1023 int ret;
1024
1025 cap->version = LINUX_VERSION_CODE;
1026
1027 ret = ops->vidioc_querycap(file, fh, cap);
1028
1029 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1030 /*
1031 * Drivers MUST fill in device_caps, so check for this and
1032 * warn if it was forgotten.
1033 */
1034 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1035 !cap->device_caps, "Bad caps for driver %s, %x %x",
1036 cap->driver, cap->capabilities, cap->device_caps);
1037 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1038
1039 return ret;
1040 }
1041
1042 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1043 struct file *file, void *fh, void *arg)
1044 {
1045 struct video_device *vfd = video_devdata(file);
1046 int ret;
1047
1048 ret = v4l_enable_media_source(vfd);
1049 if (ret)
1050 return ret;
1051 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1052 }
1053
1054 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1055 struct file *file, void *fh, void *arg)
1056 {
1057 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1058 }
1059
1060 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1061 struct file *file, void *fh, void *arg)
1062 {
1063 struct video_device *vfd;
1064 u32 *p = arg;
1065
1066 vfd = video_devdata(file);
1067 *p = v4l2_prio_max(vfd->prio);
1068 return 0;
1069 }
1070
1071 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1072 struct file *file, void *fh, void *arg)
1073 {
1074 struct video_device *vfd;
1075 struct v4l2_fh *vfh;
1076 u32 *p = arg;
1077
1078 vfd = video_devdata(file);
1079 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1080 return -ENOTTY;
1081 vfh = file->private_data;
1082 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1083 }
1084
1085 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1086 struct file *file, void *fh, void *arg)
1087 {
1088 struct video_device *vfd = video_devdata(file);
1089 struct v4l2_input *p = arg;
1090
1091 /*
1092 * We set the flags for CAP_DV_TIMINGS &
1093 * CAP_STD here based on ioctl handler provided by the
1094 * driver. If the driver doesn't support these
1095 * for a specific input, it must override these flags.
1096 */
1097 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1098 p->capabilities |= V4L2_IN_CAP_STD;
1099
1100 return ops->vidioc_enum_input(file, fh, p);
1101 }
1102
1103 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1104 struct file *file, void *fh, void *arg)
1105 {
1106 struct video_device *vfd = video_devdata(file);
1107 struct v4l2_output *p = arg;
1108
1109 /*
1110 * We set the flags for CAP_DV_TIMINGS &
1111 * CAP_STD here based on ioctl handler provided by the
1112 * driver. If the driver doesn't support these
1113 * for a specific output, it must override these flags.
1114 */
1115 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1116 p->capabilities |= V4L2_OUT_CAP_STD;
1117
1118 return ops->vidioc_enum_output(file, fh, p);
1119 }
1120
1121 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1122 {
1123 const unsigned sz = sizeof(fmt->description);
1124 const char *descr = NULL;
1125 u32 flags = 0;
1126
1127 /*
1128 * We depart from the normal coding style here since the descriptions
1129 * should be aligned so it is easy to see which descriptions will be
1130 * longer than 31 characters (the max length for a description).
1131 * And frankly, this is easier to read anyway.
1132 *
1133 * Note that gcc will use O(log N) comparisons to find the right case.
1134 */
1135 switch (fmt->pixelformat) {
1136 /* Max description length mask: descr = "0123456789012345678901234567890" */
1137 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1138 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1139 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1140 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1141 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1142 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1143 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1144 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1145 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1146 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1147 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1148 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1149 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1150 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1151 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1152 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1153 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1154 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1155 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1156 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1157 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1158 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1159 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1160 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1161 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1162 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1163 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1164 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1165 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1166 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1167 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1168 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1169 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1170 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1171 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1172 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1173 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1174 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1175 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1176 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1177 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1178 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1179 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1180 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1181 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1182 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1183 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1184 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1185 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1186 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1187 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1188 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1189 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1190 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1191 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1192 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1193 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1194 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1195 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1196 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1197 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1198 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1199 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1200 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1201 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1202 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1203 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1204 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1205 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1206 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1207 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1208 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1209 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1210 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1211 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1212 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1213 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1214 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1215 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1216 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1217 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1218 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1219 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1220 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1221 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1222 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1223 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1224 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1225 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1226 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1227 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1228 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1229 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
1230 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1231 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1232 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1233 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1234 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1235 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1236 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1237 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1238 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1239 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1240 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1241 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1242 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1243
1244 default:
1245 /* Compressed formats */
1246 flags = V4L2_FMT_FLAG_COMPRESSED;
1247 switch (fmt->pixelformat) {
1248 /* Max description length mask: descr = "0123456789012345678901234567890" */
1249 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1250 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1251 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1252 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1253 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1254 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1255 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1256 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1257 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1258 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1259 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break;
1260 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1261 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1262 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1263 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1264 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1265 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1266 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1267 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1268 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1269 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1270 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1271 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1272 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1273 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1274 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1275 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1276 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1277 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1278 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1279 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1280 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1281 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1282 default:
1283 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1284 if (fmt->description[0])
1285 return;
1286 flags = 0;
1287 snprintf(fmt->description, sz, "%c%c%c%c%s",
1288 (char)(fmt->pixelformat & 0x7f),
1289 (char)((fmt->pixelformat >> 8) & 0x7f),
1290 (char)((fmt->pixelformat >> 16) & 0x7f),
1291 (char)((fmt->pixelformat >> 24) & 0x7f),
1292 (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1293 break;
1294 }
1295 }
1296
1297 if (descr)
1298 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1299 fmt->flags = flags;
1300 }
1301
1302 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1303 struct file *file, void *fh, void *arg)
1304 {
1305 struct v4l2_fmtdesc *p = arg;
1306 struct video_device *vfd = video_devdata(file);
1307 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1308 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1309 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1310 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1311 int ret = -EINVAL;
1312
1313 switch (p->type) {
1314 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1315 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap))
1316 break;
1317 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1318 break;
1319 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1320 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1321 break;
1322 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1323 break;
1324 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1325 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1326 break;
1327 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1328 break;
1329 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1330 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1331 break;
1332 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1333 break;
1334 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1335 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1336 break;
1337 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1338 break;
1339 case V4L2_BUF_TYPE_SDR_CAPTURE:
1340 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1341 break;
1342 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1343 break;
1344 case V4L2_BUF_TYPE_SDR_OUTPUT:
1345 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1346 break;
1347 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1348 break;
1349 }
1350 if (ret == 0)
1351 v4l_fill_fmtdesc(p);
1352 return ret;
1353 }
1354
1355 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1356 struct file *file, void *fh, void *arg)
1357 {
1358 struct v4l2_format *p = arg;
1359 struct video_device *vfd = video_devdata(file);
1360 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1361 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1362 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1363 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1364 int ret;
1365
1366 /*
1367 * fmt can't be cleared for these overlay types due to the 'clips'
1368 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1369 * Those are provided by the user. So handle these two overlay types
1370 * first, and then just do a simple memset for the other types.
1371 */
1372 switch (p->type) {
1373 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1374 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1375 struct v4l2_clip __user *clips = p->fmt.win.clips;
1376 u32 clipcount = p->fmt.win.clipcount;
1377 void __user *bitmap = p->fmt.win.bitmap;
1378
1379 memset(&p->fmt, 0, sizeof(p->fmt));
1380 p->fmt.win.clips = clips;
1381 p->fmt.win.clipcount = clipcount;
1382 p->fmt.win.bitmap = bitmap;
1383 break;
1384 }
1385 default:
1386 memset(&p->fmt, 0, sizeof(p->fmt));
1387 break;
1388 }
1389
1390 switch (p->type) {
1391 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1392 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1393 break;
1394 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1395 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1396 /* just in case the driver zeroed it again */
1397 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1398 return ret;
1399 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1400 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1401 break;
1402 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1403 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1404 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1405 break;
1406 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1407 case V4L2_BUF_TYPE_VBI_CAPTURE:
1408 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1409 break;
1410 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1411 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1412 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1413 break;
1414 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1415 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1416 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1417 break;
1418 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1419 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1420 /* just in case the driver zeroed it again */
1421 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1422 return ret;
1423 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1424 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1425 break;
1426 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1427 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1428 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1429 break;
1430 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1431 case V4L2_BUF_TYPE_VBI_OUTPUT:
1432 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1433 break;
1434 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1435 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1436 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1437 break;
1438 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1439 case V4L2_BUF_TYPE_SDR_CAPTURE:
1440 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1441 break;
1442 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1443 case V4L2_BUF_TYPE_SDR_OUTPUT:
1444 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1445 break;
1446 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1447 }
1448 return -EINVAL;
1449 }
1450
1451 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1452 struct file *file, void *fh, void *arg)
1453 {
1454 struct v4l2_format *p = arg;
1455 struct video_device *vfd = video_devdata(file);
1456 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1457 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1458 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1459 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1460 int ret;
1461
1462 ret = v4l_enable_media_source(vfd);
1463 if (ret)
1464 return ret;
1465 v4l_sanitize_format(p);
1466
1467 switch (p->type) {
1468 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1469 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1470 break;
1471 CLEAR_AFTER_FIELD(p, fmt.pix);
1472 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1473 /* just in case the driver zeroed it again */
1474 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1475 return ret;
1476 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1477 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1478 break;
1479 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1480 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1481 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1482 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1483 break;
1484 CLEAR_AFTER_FIELD(p, fmt.win);
1485 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1486 case V4L2_BUF_TYPE_VBI_CAPTURE:
1487 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1488 break;
1489 CLEAR_AFTER_FIELD(p, fmt.vbi);
1490 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1491 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1492 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1493 break;
1494 CLEAR_AFTER_FIELD(p, fmt.sliced);
1495 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1496 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1497 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1498 break;
1499 CLEAR_AFTER_FIELD(p, fmt.pix);
1500 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1501 /* just in case the driver zeroed it again */
1502 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1503 return ret;
1504 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1505 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1506 break;
1507 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1508 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1509 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1510 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1511 break;
1512 CLEAR_AFTER_FIELD(p, fmt.win);
1513 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1514 case V4L2_BUF_TYPE_VBI_OUTPUT:
1515 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1516 break;
1517 CLEAR_AFTER_FIELD(p, fmt.vbi);
1518 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1519 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1520 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1521 break;
1522 CLEAR_AFTER_FIELD(p, fmt.sliced);
1523 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1524 case V4L2_BUF_TYPE_SDR_CAPTURE:
1525 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1526 break;
1527 CLEAR_AFTER_FIELD(p, fmt.sdr);
1528 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1529 case V4L2_BUF_TYPE_SDR_OUTPUT:
1530 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1531 break;
1532 CLEAR_AFTER_FIELD(p, fmt.sdr);
1533 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1534 }
1535 return -EINVAL;
1536 }
1537
1538 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1539 struct file *file, void *fh, void *arg)
1540 {
1541 struct v4l2_format *p = arg;
1542 struct video_device *vfd = video_devdata(file);
1543 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1544 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1545 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1546 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1547 int ret;
1548
1549 v4l_sanitize_format(p);
1550
1551 switch (p->type) {
1552 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1553 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1554 break;
1555 CLEAR_AFTER_FIELD(p, fmt.pix);
1556 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1557 /* just in case the driver zeroed it again */
1558 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1559 return ret;
1560 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1561 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1562 break;
1563 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1564 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1565 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1566 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1567 break;
1568 CLEAR_AFTER_FIELD(p, fmt.win);
1569 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1570 case V4L2_BUF_TYPE_VBI_CAPTURE:
1571 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1572 break;
1573 CLEAR_AFTER_FIELD(p, fmt.vbi);
1574 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1575 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1576 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1577 break;
1578 CLEAR_AFTER_FIELD(p, fmt.sliced);
1579 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1580 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1581 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1582 break;
1583 CLEAR_AFTER_FIELD(p, fmt.pix);
1584 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1585 /* just in case the driver zeroed it again */
1586 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1587 return ret;
1588 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1589 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1590 break;
1591 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1592 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1593 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1594 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1595 break;
1596 CLEAR_AFTER_FIELD(p, fmt.win);
1597 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1598 case V4L2_BUF_TYPE_VBI_OUTPUT:
1599 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1600 break;
1601 CLEAR_AFTER_FIELD(p, fmt.vbi);
1602 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1603 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1604 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1605 break;
1606 CLEAR_AFTER_FIELD(p, fmt.sliced);
1607 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1608 case V4L2_BUF_TYPE_SDR_CAPTURE:
1609 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
1610 break;
1611 CLEAR_AFTER_FIELD(p, fmt.sdr);
1612 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1613 case V4L2_BUF_TYPE_SDR_OUTPUT:
1614 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
1615 break;
1616 CLEAR_AFTER_FIELD(p, fmt.sdr);
1617 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1618 }
1619 return -EINVAL;
1620 }
1621
1622 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1623 struct file *file, void *fh, void *arg)
1624 {
1625 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1626 }
1627
1628 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1629 struct file *file, void *fh, void *arg)
1630 {
1631 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1632 }
1633
1634 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1635 struct file *file, void *fh, void *arg)
1636 {
1637 struct video_device *vfd = video_devdata(file);
1638 struct v4l2_tuner *p = arg;
1639 int err;
1640
1641 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1642 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1643 err = ops->vidioc_g_tuner(file, fh, p);
1644 if (!err)
1645 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1646 return err;
1647 }
1648
1649 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1650 struct file *file, void *fh, void *arg)
1651 {
1652 struct video_device *vfd = video_devdata(file);
1653 struct v4l2_tuner *p = arg;
1654 int ret;
1655
1656 ret = v4l_enable_media_source(vfd);
1657 if (ret)
1658 return ret;
1659 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1660 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1661 return ops->vidioc_s_tuner(file, fh, p);
1662 }
1663
1664 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1665 struct file *file, void *fh, void *arg)
1666 {
1667 struct video_device *vfd = video_devdata(file);
1668 struct v4l2_modulator *p = arg;
1669 int err;
1670
1671 if (vfd->vfl_type == VFL_TYPE_RADIO)
1672 p->type = V4L2_TUNER_RADIO;
1673
1674 err = ops->vidioc_g_modulator(file, fh, p);
1675 if (!err)
1676 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1677 return err;
1678 }
1679
1680 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1681 struct file *file, void *fh, void *arg)
1682 {
1683 struct video_device *vfd = video_devdata(file);
1684 struct v4l2_modulator *p = arg;
1685
1686 if (vfd->vfl_type == VFL_TYPE_RADIO)
1687 p->type = V4L2_TUNER_RADIO;
1688
1689 return ops->vidioc_s_modulator(file, fh, p);
1690 }
1691
1692 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1693 struct file *file, void *fh, void *arg)
1694 {
1695 struct video_device *vfd = video_devdata(file);
1696 struct v4l2_frequency *p = arg;
1697
1698 if (vfd->vfl_type == VFL_TYPE_SDR)
1699 p->type = V4L2_TUNER_SDR;
1700 else
1701 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1702 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1703 return ops->vidioc_g_frequency(file, fh, p);
1704 }
1705
1706 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1707 struct file *file, void *fh, void *arg)
1708 {
1709 struct video_device *vfd = video_devdata(file);
1710 const struct v4l2_frequency *p = arg;
1711 enum v4l2_tuner_type type;
1712 int ret;
1713
1714 ret = v4l_enable_media_source(vfd);
1715 if (ret)
1716 return ret;
1717 if (vfd->vfl_type == VFL_TYPE_SDR) {
1718 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1719 return -EINVAL;
1720 } else {
1721 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1722 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1723 if (type != p->type)
1724 return -EINVAL;
1725 }
1726 return ops->vidioc_s_frequency(file, fh, p);
1727 }
1728
1729 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1730 struct file *file, void *fh, void *arg)
1731 {
1732 struct video_device *vfd = video_devdata(file);
1733 struct v4l2_standard *p = arg;
1734 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1735 unsigned int index = p->index, i, j = 0;
1736 const char *descr = "";
1737
1738 /* Return -ENODATA if the tvnorms for the current input
1739 or output is 0, meaning that it doesn't support this API. */
1740 if (id == 0)
1741 return -ENODATA;
1742
1743 /* Return norm array in a canonical way */
1744 for (i = 0; i <= index && id; i++) {
1745 /* last std value in the standards array is 0, so this
1746 while always ends there since (id & 0) == 0. */
1747 while ((id & standards[j].std) != standards[j].std)
1748 j++;
1749 curr_id = standards[j].std;
1750 descr = standards[j].descr;
1751 j++;
1752 if (curr_id == 0)
1753 break;
1754 if (curr_id != V4L2_STD_PAL &&
1755 curr_id != V4L2_STD_SECAM &&
1756 curr_id != V4L2_STD_NTSC)
1757 id &= ~curr_id;
1758 }
1759 if (i <= index)
1760 return -EINVAL;
1761
1762 v4l2_video_std_construct(p, curr_id, descr);
1763 return 0;
1764 }
1765
1766 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1767 struct file *file, void *fh, void *arg)
1768 {
1769 struct video_device *vfd = video_devdata(file);
1770 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1771 int ret;
1772
1773 ret = v4l_enable_media_source(vfd);
1774 if (ret)
1775 return ret;
1776 norm = id & vfd->tvnorms;
1777 if (vfd->tvnorms && !norm) /* Check if std is supported */
1778 return -EINVAL;
1779
1780 /* Calls the specific handler */
1781 return ops->vidioc_s_std(file, fh, norm);
1782 }
1783
1784 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1785 struct file *file, void *fh, void *arg)
1786 {
1787 struct video_device *vfd = video_devdata(file);
1788 v4l2_std_id *p = arg;
1789 int ret;
1790
1791 ret = v4l_enable_media_source(vfd);
1792 if (ret)
1793 return ret;
1794 /*
1795 * If no signal is detected, then the driver should return
1796 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1797 * any standards that do not apply removed.
1798 *
1799 * This means that tuners, audio and video decoders can join
1800 * their efforts to improve the standards detection.
1801 */
1802 *p = vfd->tvnorms;
1803 return ops->vidioc_querystd(file, fh, arg);
1804 }
1805
1806 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1807 struct file *file, void *fh, void *arg)
1808 {
1809 struct video_device *vfd = video_devdata(file);
1810 struct v4l2_hw_freq_seek *p = arg;
1811 enum v4l2_tuner_type type;
1812 int ret;
1813
1814 ret = v4l_enable_media_source(vfd);
1815 if (ret)
1816 return ret;
1817 /* s_hw_freq_seek is not supported for SDR for now */
1818 if (vfd->vfl_type == VFL_TYPE_SDR)
1819 return -EINVAL;
1820
1821 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1822 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1823 if (p->type != type)
1824 return -EINVAL;
1825 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1826 }
1827
1828 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1829 struct file *file, void *fh, void *arg)
1830 {
1831 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1832 }
1833
1834 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1835 struct file *file, void *fh, void *arg)
1836 {
1837 struct v4l2_requestbuffers *p = arg;
1838 int ret = check_fmt(file, p->type);
1839
1840 if (ret)
1841 return ret;
1842
1843 CLEAR_AFTER_FIELD(p, memory);
1844
1845 return ops->vidioc_reqbufs(file, fh, p);
1846 }
1847
1848 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1849 struct file *file, void *fh, void *arg)
1850 {
1851 struct v4l2_buffer *p = arg;
1852 int ret = check_fmt(file, p->type);
1853
1854 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1855 }
1856
1857 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1858 struct file *file, void *fh, void *arg)
1859 {
1860 struct v4l2_buffer *p = arg;
1861 int ret = check_fmt(file, p->type);
1862
1863 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1864 }
1865
1866 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1867 struct file *file, void *fh, void *arg)
1868 {
1869 struct v4l2_buffer *p = arg;
1870 int ret = check_fmt(file, p->type);
1871
1872 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1873 }
1874
1875 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1876 struct file *file, void *fh, void *arg)
1877 {
1878 struct v4l2_create_buffers *create = arg;
1879 int ret = check_fmt(file, create->format.type);
1880
1881 if (ret)
1882 return ret;
1883
1884 CLEAR_AFTER_FIELD(create, format);
1885
1886 v4l_sanitize_format(&create->format);
1887
1888 ret = ops->vidioc_create_bufs(file, fh, create);
1889
1890 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1891 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1892 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1893
1894 return ret;
1895 }
1896
1897 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1898 struct file *file, void *fh, void *arg)
1899 {
1900 struct v4l2_buffer *b = arg;
1901 int ret = check_fmt(file, b->type);
1902
1903 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1904 }
1905
1906 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1907 struct file *file, void *fh, void *arg)
1908 {
1909 struct v4l2_streamparm *p = arg;
1910 v4l2_std_id std;
1911 int ret = check_fmt(file, p->type);
1912
1913 if (ret)
1914 return ret;
1915 if (ops->vidioc_g_parm)
1916 return ops->vidioc_g_parm(file, fh, p);
1917 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1918 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1919 return -EINVAL;
1920 p->parm.capture.readbuffers = 2;
1921 ret = ops->vidioc_g_std(file, fh, &std);
1922 if (ret == 0)
1923 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1924 return ret;
1925 }
1926
1927 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1928 struct file *file, void *fh, void *arg)
1929 {
1930 struct v4l2_streamparm *p = arg;
1931 int ret = check_fmt(file, p->type);
1932
1933 return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1934 }
1935
1936 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1937 struct file *file, void *fh, void *arg)
1938 {
1939 struct video_device *vfd = video_devdata(file);
1940 struct v4l2_queryctrl *p = arg;
1941 struct v4l2_fh *vfh =
1942 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1943
1944 if (vfh && vfh->ctrl_handler)
1945 return v4l2_queryctrl(vfh->ctrl_handler, p);
1946 if (vfd->ctrl_handler)
1947 return v4l2_queryctrl(vfd->ctrl_handler, p);
1948 if (ops->vidioc_queryctrl)
1949 return ops->vidioc_queryctrl(file, fh, p);
1950 return -ENOTTY;
1951 }
1952
1953 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
1954 struct file *file, void *fh, void *arg)
1955 {
1956 struct video_device *vfd = video_devdata(file);
1957 struct v4l2_query_ext_ctrl *p = arg;
1958 struct v4l2_fh *vfh =
1959 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1960
1961 if (vfh && vfh->ctrl_handler)
1962 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
1963 if (vfd->ctrl_handler)
1964 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
1965 if (ops->vidioc_query_ext_ctrl)
1966 return ops->vidioc_query_ext_ctrl(file, fh, p);
1967 return -ENOTTY;
1968 }
1969
1970 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1971 struct file *file, void *fh, void *arg)
1972 {
1973 struct video_device *vfd = video_devdata(file);
1974 struct v4l2_querymenu *p = arg;
1975 struct v4l2_fh *vfh =
1976 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1977
1978 if (vfh && vfh->ctrl_handler)
1979 return v4l2_querymenu(vfh->ctrl_handler, p);
1980 if (vfd->ctrl_handler)
1981 return v4l2_querymenu(vfd->ctrl_handler, p);
1982 if (ops->vidioc_querymenu)
1983 return ops->vidioc_querymenu(file, fh, p);
1984 return -ENOTTY;
1985 }
1986
1987 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1988 struct file *file, void *fh, void *arg)
1989 {
1990 struct video_device *vfd = video_devdata(file);
1991 struct v4l2_control *p = arg;
1992 struct v4l2_fh *vfh =
1993 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1994 struct v4l2_ext_controls ctrls;
1995 struct v4l2_ext_control ctrl;
1996
1997 if (vfh && vfh->ctrl_handler)
1998 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1999 if (vfd->ctrl_handler)
2000 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2001 if (ops->vidioc_g_ctrl)
2002 return ops->vidioc_g_ctrl(file, fh, p);
2003 if (ops->vidioc_g_ext_ctrls == NULL)
2004 return -ENOTTY;
2005
2006 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2007 ctrls.count = 1;
2008 ctrls.controls = &ctrl;
2009 ctrl.id = p->id;
2010 ctrl.value = p->value;
2011 if (check_ext_ctrls(&ctrls, 1)) {
2012 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2013
2014 if (ret == 0)
2015 p->value = ctrl.value;
2016 return ret;
2017 }
2018 return -EINVAL;
2019 }
2020
2021 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2022 struct file *file, void *fh, void *arg)
2023 {
2024 struct video_device *vfd = video_devdata(file);
2025 struct v4l2_control *p = arg;
2026 struct v4l2_fh *vfh =
2027 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2028 struct v4l2_ext_controls ctrls;
2029 struct v4l2_ext_control ctrl;
2030
2031 if (vfh && vfh->ctrl_handler)
2032 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2033 if (vfd->ctrl_handler)
2034 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2035 if (ops->vidioc_s_ctrl)
2036 return ops->vidioc_s_ctrl(file, fh, p);
2037 if (ops->vidioc_s_ext_ctrls == NULL)
2038 return -ENOTTY;
2039
2040 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2041 ctrls.count = 1;
2042 ctrls.controls = &ctrl;
2043 ctrl.id = p->id;
2044 ctrl.value = p->value;
2045 if (check_ext_ctrls(&ctrls, 1))
2046 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2047 return -EINVAL;
2048 }
2049
2050 static int v4l_g_ext_ctrls(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_ext_controls *p = arg;
2055 struct v4l2_fh *vfh =
2056 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2057
2058 p->error_idx = p->count;
2059 if (vfh && vfh->ctrl_handler)
2060 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2061 if (vfd->ctrl_handler)
2062 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2063 if (ops->vidioc_g_ext_ctrls == NULL)
2064 return -ENOTTY;
2065 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2066 -EINVAL;
2067 }
2068
2069 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2070 struct file *file, void *fh, void *arg)
2071 {
2072 struct video_device *vfd = video_devdata(file);
2073 struct v4l2_ext_controls *p = arg;
2074 struct v4l2_fh *vfh =
2075 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2076
2077 p->error_idx = p->count;
2078 if (vfh && vfh->ctrl_handler)
2079 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2080 if (vfd->ctrl_handler)
2081 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2082 if (ops->vidioc_s_ext_ctrls == NULL)
2083 return -ENOTTY;
2084 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2085 -EINVAL;
2086 }
2087
2088 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2089 struct file *file, void *fh, void *arg)
2090 {
2091 struct video_device *vfd = video_devdata(file);
2092 struct v4l2_ext_controls *p = arg;
2093 struct v4l2_fh *vfh =
2094 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2095
2096 p->error_idx = p->count;
2097 if (vfh && vfh->ctrl_handler)
2098 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2099 if (vfd->ctrl_handler)
2100 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2101 if (ops->vidioc_try_ext_ctrls == NULL)
2102 return -ENOTTY;
2103 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2104 -EINVAL;
2105 }
2106
2107 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2108 struct file *file, void *fh, void *arg)
2109 {
2110 struct v4l2_crop *p = arg;
2111 struct v4l2_selection s = {
2112 .type = p->type,
2113 };
2114 int ret;
2115
2116 if (ops->vidioc_g_crop)
2117 return ops->vidioc_g_crop(file, fh, p);
2118 /* simulate capture crop using selection api */
2119
2120 /* crop means compose for output devices */
2121 if (V4L2_TYPE_IS_OUTPUT(p->type))
2122 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2123 else
2124 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2125
2126 ret = ops->vidioc_g_selection(file, fh, &s);
2127
2128 /* copying results to old structure on success */
2129 if (!ret)
2130 p->c = s.r;
2131 return ret;
2132 }
2133
2134 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2135 struct file *file, void *fh, void *arg)
2136 {
2137 struct v4l2_crop *p = arg;
2138 struct v4l2_selection s = {
2139 .type = p->type,
2140 .r = p->c,
2141 };
2142
2143 if (ops->vidioc_s_crop)
2144 return ops->vidioc_s_crop(file, fh, p);
2145 /* simulate capture crop using selection api */
2146
2147 /* crop means compose for output devices */
2148 if (V4L2_TYPE_IS_OUTPUT(p->type))
2149 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2150 else
2151 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2152
2153 return ops->vidioc_s_selection(file, fh, &s);
2154 }
2155
2156 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2157 struct file *file, void *fh, void *arg)
2158 {
2159 struct v4l2_cropcap *p = arg;
2160
2161 if (ops->vidioc_g_selection) {
2162 struct v4l2_selection s = { .type = p->type };
2163 int ret;
2164
2165 /* obtaining bounds */
2166 if (V4L2_TYPE_IS_OUTPUT(p->type))
2167 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2168 else
2169 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2170
2171 ret = ops->vidioc_g_selection(file, fh, &s);
2172 if (ret)
2173 return ret;
2174 p->bounds = s.r;
2175
2176 /* obtaining defrect */
2177 if (V4L2_TYPE_IS_OUTPUT(p->type))
2178 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2179 else
2180 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2181
2182 ret = ops->vidioc_g_selection(file, fh, &s);
2183 if (ret)
2184 return ret;
2185 p->defrect = s.r;
2186 }
2187
2188 /* setting trivial pixelaspect */
2189 p->pixelaspect.numerator = 1;
2190 p->pixelaspect.denominator = 1;
2191
2192 if (ops->vidioc_cropcap)
2193 return ops->vidioc_cropcap(file, fh, p);
2194
2195 return 0;
2196 }
2197
2198 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2199 struct file *file, void *fh, void *arg)
2200 {
2201 struct video_device *vfd = video_devdata(file);
2202 int ret;
2203
2204 if (vfd->v4l2_dev)
2205 pr_info("%s: ================= START STATUS =================\n",
2206 vfd->v4l2_dev->name);
2207 ret = ops->vidioc_log_status(file, fh);
2208 if (vfd->v4l2_dev)
2209 pr_info("%s: ================== END STATUS ==================\n",
2210 vfd->v4l2_dev->name);
2211 return ret;
2212 }
2213
2214 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2215 struct file *file, void *fh, void *arg)
2216 {
2217 #ifdef CONFIG_VIDEO_ADV_DEBUG
2218 struct v4l2_dbg_register *p = arg;
2219 struct video_device *vfd = video_devdata(file);
2220 struct v4l2_subdev *sd;
2221 int idx = 0;
2222
2223 if (!capable(CAP_SYS_ADMIN))
2224 return -EPERM;
2225 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2226 if (vfd->v4l2_dev == NULL)
2227 return -EINVAL;
2228 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2229 if (p->match.addr == idx++)
2230 return v4l2_subdev_call(sd, core, g_register, p);
2231 return -EINVAL;
2232 }
2233 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2234 (ops->vidioc_g_chip_info || p->match.addr == 0))
2235 return ops->vidioc_g_register(file, fh, p);
2236 return -EINVAL;
2237 #else
2238 return -ENOTTY;
2239 #endif
2240 }
2241
2242 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2243 struct file *file, void *fh, void *arg)
2244 {
2245 #ifdef CONFIG_VIDEO_ADV_DEBUG
2246 const struct v4l2_dbg_register *p = arg;
2247 struct video_device *vfd = video_devdata(file);
2248 struct v4l2_subdev *sd;
2249 int idx = 0;
2250
2251 if (!capable(CAP_SYS_ADMIN))
2252 return -EPERM;
2253 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2254 if (vfd->v4l2_dev == NULL)
2255 return -EINVAL;
2256 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2257 if (p->match.addr == idx++)
2258 return v4l2_subdev_call(sd, core, s_register, p);
2259 return -EINVAL;
2260 }
2261 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2262 (ops->vidioc_g_chip_info || p->match.addr == 0))
2263 return ops->vidioc_s_register(file, fh, p);
2264 return -EINVAL;
2265 #else
2266 return -ENOTTY;
2267 #endif
2268 }
2269
2270 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2271 struct file *file, void *fh, void *arg)
2272 {
2273 #ifdef CONFIG_VIDEO_ADV_DEBUG
2274 struct video_device *vfd = video_devdata(file);
2275 struct v4l2_dbg_chip_info *p = arg;
2276 struct v4l2_subdev *sd;
2277 int idx = 0;
2278
2279 switch (p->match.type) {
2280 case V4L2_CHIP_MATCH_BRIDGE:
2281 if (ops->vidioc_s_register)
2282 p->flags |= V4L2_CHIP_FL_WRITABLE;
2283 if (ops->vidioc_g_register)
2284 p->flags |= V4L2_CHIP_FL_READABLE;
2285 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2286 if (ops->vidioc_g_chip_info)
2287 return ops->vidioc_g_chip_info(file, fh, arg);
2288 if (p->match.addr)
2289 return -EINVAL;
2290 return 0;
2291
2292 case V4L2_CHIP_MATCH_SUBDEV:
2293 if (vfd->v4l2_dev == NULL)
2294 break;
2295 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2296 if (p->match.addr != idx++)
2297 continue;
2298 if (sd->ops->core && sd->ops->core->s_register)
2299 p->flags |= V4L2_CHIP_FL_WRITABLE;
2300 if (sd->ops->core && sd->ops->core->g_register)
2301 p->flags |= V4L2_CHIP_FL_READABLE;
2302 strlcpy(p->name, sd->name, sizeof(p->name));
2303 return 0;
2304 }
2305 break;
2306 }
2307 return -EINVAL;
2308 #else
2309 return -ENOTTY;
2310 #endif
2311 }
2312
2313 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2314 struct file *file, void *fh, void *arg)
2315 {
2316 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2317 }
2318
2319 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2320 struct file *file, void *fh, void *arg)
2321 {
2322 return ops->vidioc_subscribe_event(fh, arg);
2323 }
2324
2325 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2326 struct file *file, void *fh, void *arg)
2327 {
2328 return ops->vidioc_unsubscribe_event(fh, arg);
2329 }
2330
2331 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2332 struct file *file, void *fh, void *arg)
2333 {
2334 struct v4l2_sliced_vbi_cap *p = arg;
2335 int ret = check_fmt(file, p->type);
2336
2337 if (ret)
2338 return ret;
2339
2340 /* Clear up to type, everything after type is zeroed already */
2341 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2342
2343 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2344 }
2345
2346 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2347 struct file *file, void *fh, void *arg)
2348 {
2349 struct video_device *vfd = video_devdata(file);
2350 struct v4l2_frequency_band *p = arg;
2351 enum v4l2_tuner_type type;
2352 int err;
2353
2354 if (vfd->vfl_type == VFL_TYPE_SDR) {
2355 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2356 return -EINVAL;
2357 type = p->type;
2358 } else {
2359 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2360 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2361 if (type != p->type)
2362 return -EINVAL;
2363 }
2364 if (ops->vidioc_enum_freq_bands) {
2365 err = ops->vidioc_enum_freq_bands(file, fh, p);
2366 if (err != -ENOTTY)
2367 return err;
2368 }
2369 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2370 struct v4l2_tuner t = {
2371 .index = p->tuner,
2372 .type = type,
2373 };
2374
2375 if (p->index)
2376 return -EINVAL;
2377 err = ops->vidioc_g_tuner(file, fh, &t);
2378 if (err)
2379 return err;
2380 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2381 p->rangelow = t.rangelow;
2382 p->rangehigh = t.rangehigh;
2383 p->modulation = (type == V4L2_TUNER_RADIO) ?
2384 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2385 return 0;
2386 }
2387 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2388 struct v4l2_modulator m = {
2389 .index = p->tuner,
2390 };
2391
2392 if (type != V4L2_TUNER_RADIO)
2393 return -EINVAL;
2394 if (p->index)
2395 return -EINVAL;
2396 err = ops->vidioc_g_modulator(file, fh, &m);
2397 if (err)
2398 return err;
2399 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2400 p->rangelow = m.rangelow;
2401 p->rangehigh = m.rangehigh;
2402 p->modulation = (type == V4L2_TUNER_RADIO) ?
2403 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2404 return 0;
2405 }
2406 return -ENOTTY;
2407 }
2408
2409 struct v4l2_ioctl_info {
2410 unsigned int ioctl;
2411 u32 flags;
2412 const char * const name;
2413 union {
2414 u32 offset;
2415 int (*func)(const struct v4l2_ioctl_ops *ops,
2416 struct file *file, void *fh, void *p);
2417 } u;
2418 void (*debug)(const void *arg, bool write_only);
2419 };
2420
2421 /* This control needs a priority check */
2422 #define INFO_FL_PRIO (1 << 0)
2423 /* This control can be valid if the filehandle passes a control handler. */
2424 #define INFO_FL_CTRL (1 << 1)
2425 /* This is a standard ioctl, no need for special code */
2426 #define INFO_FL_STD (1 << 2)
2427 /* This is ioctl has its own function */
2428 #define INFO_FL_FUNC (1 << 3)
2429 /* Queuing ioctl */
2430 #define INFO_FL_QUEUE (1 << 4)
2431 /* Zero struct from after the field to the end */
2432 #define INFO_FL_CLEAR(v4l2_struct, field) \
2433 ((offsetof(struct v4l2_struct, field) + \
2434 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2435 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2436
2437 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
2438 [_IOC_NR(_ioctl)] = { \
2439 .ioctl = _ioctl, \
2440 .flags = _flags | INFO_FL_STD, \
2441 .name = #_ioctl, \
2442 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
2443 .debug = _debug, \
2444 }
2445
2446 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
2447 [_IOC_NR(_ioctl)] = { \
2448 .ioctl = _ioctl, \
2449 .flags = _flags | INFO_FL_FUNC, \
2450 .name = #_ioctl, \
2451 .u.func = _func, \
2452 .debug = _debug, \
2453 }
2454
2455 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2456 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2457 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2458 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2459 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2460 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2461 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2462 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2463 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2464 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2465 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2466 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2467 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2468 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2469 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2470 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2471 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2472 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2473 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2474 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2475 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2476 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2477 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2478 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2479 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2480 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2481 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2482 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2483 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2484 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2485 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2486 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2487 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2488 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2489 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2490 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2491 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2492 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2493 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2494 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2495 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2496 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2497 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2498 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2499 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2500 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2501 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2502 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2503 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2504 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2505 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2506 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2507 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2508 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2509 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2510 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)),
2511 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2512 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2513 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2514 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2515 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2516 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2517 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2518 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2519 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2520 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2521 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2522 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2523 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2524 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2525 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2526 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2527 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2528 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2529 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2530 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2531 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2532 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2533 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2534 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2535 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2536 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)),
2537 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)),
2538 };
2539 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2540
2541 bool v4l2_is_known_ioctl(unsigned int cmd)
2542 {
2543 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2544 return false;
2545 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2546 }
2547
2548 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2549 {
2550 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2551 return vdev->lock;
2552 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2553 return NULL;
2554 if (vdev->queue && vdev->queue->lock &&
2555 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2556 return vdev->queue->lock;
2557 return vdev->lock;
2558 }
2559
2560 /* Common ioctl debug function. This function can be used by
2561 external ioctl messages as well as internal V4L ioctl */
2562 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2563 {
2564 const char *dir, *type;
2565
2566 if (prefix)
2567 printk(KERN_DEBUG "%s: ", prefix);
2568
2569 switch (_IOC_TYPE(cmd)) {
2570 case 'd':
2571 type = "v4l2_int";
2572 break;
2573 case 'V':
2574 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2575 type = "v4l2";
2576 break;
2577 }
2578 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2579 return;
2580 default:
2581 type = "unknown";
2582 break;
2583 }
2584
2585 switch (_IOC_DIR(cmd)) {
2586 case _IOC_NONE: dir = "--"; break;
2587 case _IOC_READ: dir = "r-"; break;
2588 case _IOC_WRITE: dir = "-w"; break;
2589 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2590 default: dir = "*ERR*"; break;
2591 }
2592 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2593 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2594 }
2595 EXPORT_SYMBOL(v4l_printk_ioctl);
2596
2597 static long __video_do_ioctl(struct file *file,
2598 unsigned int cmd, void *arg)
2599 {
2600 struct video_device *vfd = video_devdata(file);
2601 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2602 bool write_only = false;
2603 struct v4l2_ioctl_info default_info;
2604 const struct v4l2_ioctl_info *info;
2605 void *fh = file->private_data;
2606 struct v4l2_fh *vfh = NULL;
2607 int dev_debug = vfd->dev_debug;
2608 long ret = -ENOTTY;
2609
2610 if (ops == NULL) {
2611 pr_warn("%s: has no ioctl_ops.\n",
2612 video_device_node_name(vfd));
2613 return ret;
2614 }
2615
2616 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2617 vfh = file->private_data;
2618
2619 if (v4l2_is_known_ioctl(cmd)) {
2620 info = &v4l2_ioctls[_IOC_NR(cmd)];
2621
2622 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2623 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2624 goto done;
2625
2626 if (vfh && (info->flags & INFO_FL_PRIO)) {
2627 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2628 if (ret)
2629 goto done;
2630 }
2631 } else {
2632 default_info.ioctl = cmd;
2633 default_info.flags = 0;
2634 default_info.debug = v4l_print_default;
2635 info = &default_info;
2636 }
2637
2638 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2639 if (info->flags & INFO_FL_STD) {
2640 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2641 const void *p = vfd->ioctl_ops;
2642 const vidioc_op *vidioc = p + info->u.offset;
2643
2644 ret = (*vidioc)(file, fh, arg);
2645 } else if (info->flags & INFO_FL_FUNC) {
2646 ret = info->u.func(ops, file, fh, arg);
2647 } else if (!ops->vidioc_default) {
2648 ret = -ENOTTY;
2649 } else {
2650 ret = ops->vidioc_default(file, fh,
2651 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2652 cmd, arg);
2653 }
2654
2655 done:
2656 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2657 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2658 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2659 return ret;
2660
2661 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2662 if (ret < 0)
2663 pr_cont(": error %ld", ret);
2664 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2665 pr_cont("\n");
2666 else if (_IOC_DIR(cmd) == _IOC_NONE)
2667 info->debug(arg, write_only);
2668 else {
2669 pr_cont(": ");
2670 info->debug(arg, write_only);
2671 }
2672 }
2673
2674 return ret;
2675 }
2676
2677 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2678 void __user **user_ptr, void ***kernel_ptr)
2679 {
2680 int ret = 0;
2681
2682 switch (cmd) {
2683 case VIDIOC_PREPARE_BUF:
2684 case VIDIOC_QUERYBUF:
2685 case VIDIOC_QBUF:
2686 case VIDIOC_DQBUF: {
2687 struct v4l2_buffer *buf = parg;
2688
2689 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2690 if (buf->length > VIDEO_MAX_PLANES) {
2691 ret = -EINVAL;
2692 break;
2693 }
2694 *user_ptr = (void __user *)buf->m.planes;
2695 *kernel_ptr = (void **)&buf->m.planes;
2696 *array_size = sizeof(struct v4l2_plane) * buf->length;
2697 ret = 1;
2698 }
2699 break;
2700 }
2701
2702 case VIDIOC_G_EDID:
2703 case VIDIOC_S_EDID: {
2704 struct v4l2_edid *edid = parg;
2705
2706 if (edid->blocks) {
2707 if (edid->blocks > 256) {
2708 ret = -EINVAL;
2709 break;
2710 }
2711 *user_ptr = (void __user *)edid->edid;
2712 *kernel_ptr = (void **)&edid->edid;
2713 *array_size = edid->blocks * 128;
2714 ret = 1;
2715 }
2716 break;
2717 }
2718
2719 case VIDIOC_S_EXT_CTRLS:
2720 case VIDIOC_G_EXT_CTRLS:
2721 case VIDIOC_TRY_EXT_CTRLS: {
2722 struct v4l2_ext_controls *ctrls = parg;
2723
2724 if (ctrls->count != 0) {
2725 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2726 ret = -EINVAL;
2727 break;
2728 }
2729 *user_ptr = (void __user *)ctrls->controls;
2730 *kernel_ptr = (void **)&ctrls->controls;
2731 *array_size = sizeof(struct v4l2_ext_control)
2732 * ctrls->count;
2733 ret = 1;
2734 }
2735 break;
2736 }
2737 }
2738
2739 return ret;
2740 }
2741
2742 long
2743 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2744 v4l2_kioctl func)
2745 {
2746 char sbuf[128];
2747 void *mbuf = NULL;
2748 void *parg = (void *)arg;
2749 long err = -EINVAL;
2750 bool has_array_args;
2751 size_t array_size = 0;
2752 void __user *user_ptr = NULL;
2753 void **kernel_ptr = NULL;
2754
2755 /* Copy arguments into temp kernel buffer */
2756 if (_IOC_DIR(cmd) != _IOC_NONE) {
2757 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2758 parg = sbuf;
2759 } else {
2760 /* too big to allocate from stack */
2761 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2762 if (NULL == mbuf)
2763 return -ENOMEM;
2764 parg = mbuf;
2765 }
2766
2767 err = -EFAULT;
2768 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2769 unsigned int n = _IOC_SIZE(cmd);
2770
2771 /*
2772 * In some cases, only a few fields are used as input,
2773 * i.e. when the app sets "index" and then the driver
2774 * fills in the rest of the structure for the thing
2775 * with that index. We only need to copy up the first
2776 * non-input field.
2777 */
2778 if (v4l2_is_known_ioctl(cmd)) {
2779 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2780 if (flags & INFO_FL_CLEAR_MASK)
2781 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2782 }
2783
2784 if (copy_from_user(parg, (void __user *)arg, n))
2785 goto out;
2786
2787 /* zero out anything we don't copy from userspace */
2788 if (n < _IOC_SIZE(cmd))
2789 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2790 } else {
2791 /* read-only ioctl */
2792 memset(parg, 0, _IOC_SIZE(cmd));
2793 }
2794 }
2795
2796 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2797 if (err < 0)
2798 goto out;
2799 has_array_args = err;
2800
2801 if (has_array_args) {
2802 /*
2803 * When adding new types of array args, make sure that the
2804 * parent argument to ioctl (which contains the pointer to the
2805 * array) fits into sbuf (so that mbuf will still remain
2806 * unused up to here).
2807 */
2808 mbuf = kmalloc(array_size, GFP_KERNEL);
2809 err = -ENOMEM;
2810 if (NULL == mbuf)
2811 goto out_array_args;
2812 err = -EFAULT;
2813 if (copy_from_user(mbuf, user_ptr, array_size))
2814 goto out_array_args;
2815 *kernel_ptr = mbuf;
2816 }
2817
2818 /* Handles IOCTL */
2819 err = func(file, cmd, parg);
2820 if (err == -ENOIOCTLCMD)
2821 err = -ENOTTY;
2822 if (err == 0) {
2823 if (cmd == VIDIOC_DQBUF)
2824 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2825 else if (cmd == VIDIOC_QBUF)
2826 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2827 }
2828
2829 if (has_array_args) {
2830 *kernel_ptr = (void __force *)user_ptr;
2831 if (copy_to_user(user_ptr, mbuf, array_size))
2832 err = -EFAULT;
2833 goto out_array_args;
2834 }
2835 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2836 results that must be returned. */
2837 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2838 goto out;
2839
2840 out_array_args:
2841 /* Copy results into user buffer */
2842 switch (_IOC_DIR(cmd)) {
2843 case _IOC_READ:
2844 case (_IOC_WRITE | _IOC_READ):
2845 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2846 err = -EFAULT;
2847 break;
2848 }
2849
2850 out:
2851 kfree(mbuf);
2852 return err;
2853 }
2854 EXPORT_SYMBOL(video_usercopy);
2855
2856 long video_ioctl2(struct file *file,
2857 unsigned int cmd, unsigned long arg)
2858 {
2859 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2860 }
2861 EXPORT_SYMBOL(video_ioctl2);
Linux with added FPC-III support