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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / media / v4l2-core / v4l2-ioctl.c
blob0c3f238a2e7647d84b7135f5a7622aa69f2425f8
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, capabilities=0x%08x, device_caps=0x%08x\n",
178 (int)sizeof(p->driver), p->driver,
179 (int)sizeof(p->card), p->card,
180 (int)sizeof(p->bus_info), p->bus_info,
181 p->version, p->capabilities, p->device_caps);
182 }
183
184 static void v4l_print_enuminput(const void *arg, bool write_only)
185 {
186 const struct v4l2_input *p = arg;
187
188 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
189 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
190 p->tuner, (unsigned long long)p->std, p->status,
191 p->capabilities);
192 }
193
194 static void v4l_print_enumoutput(const void *arg, bool write_only)
195 {
196 const struct v4l2_output *p = arg;
197
198 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
199 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
200 p->modulator, (unsigned long long)p->std, p->capabilities);
201 }
202
203 static void v4l_print_audio(const void *arg, bool write_only)
204 {
205 const struct v4l2_audio *p = arg;
206
207 if (write_only)
208 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
209 else
210 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
211 p->index, (int)sizeof(p->name), p->name,
212 p->capability, p->mode);
213 }
214
215 static void v4l_print_audioout(const void *arg, bool write_only)
216 {
217 const struct v4l2_audioout *p = arg;
218
219 if (write_only)
220 pr_cont("index=%u\n", p->index);
221 else
222 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
223 p->index, (int)sizeof(p->name), p->name,
224 p->capability, p->mode);
225 }
226
227 static void v4l_print_fmtdesc(const void *arg, bool write_only)
228 {
229 const struct v4l2_fmtdesc *p = arg;
230
231 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
232 p->index, prt_names(p->type, v4l2_type_names),
233 p->flags, (p->pixelformat & 0xff),
234 (p->pixelformat >> 8) & 0xff,
235 (p->pixelformat >> 16) & 0xff,
236 (p->pixelformat >> 24) & 0xff,
237 (int)sizeof(p->description), p->description);
238 }
239
240 static void v4l_print_format(const void *arg, bool write_only)
241 {
242 const struct v4l2_format *p = arg;
243 const struct v4l2_pix_format *pix;
244 const struct v4l2_pix_format_mplane *mp;
245 const struct v4l2_vbi_format *vbi;
246 const struct v4l2_sliced_vbi_format *sliced;
247 const struct v4l2_window *win;
248 const struct v4l2_sdr_format *sdr;
249 unsigned i;
250
251 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
252 switch (p->type) {
253 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
254 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
255 pix = &p->fmt.pix;
256 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
257 pix->width, pix->height,
258 (pix->pixelformat & 0xff),
259 (pix->pixelformat >> 8) & 0xff,
260 (pix->pixelformat >> 16) & 0xff,
261 (pix->pixelformat >> 24) & 0xff,
262 prt_names(pix->field, v4l2_field_names),
263 pix->bytesperline, pix->sizeimage,
264 pix->colorspace, pix->flags, pix->ycbcr_enc,
265 pix->quantization, pix->xfer_func);
266 break;
267 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
268 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
269 mp = &p->fmt.pix_mp;
270 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
271 mp->width, mp->height,
272 (mp->pixelformat & 0xff),
273 (mp->pixelformat >> 8) & 0xff,
274 (mp->pixelformat >> 16) & 0xff,
275 (mp->pixelformat >> 24) & 0xff,
276 prt_names(mp->field, v4l2_field_names),
277 mp->colorspace, mp->num_planes, mp->flags,
278 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
279 for (i = 0; i < mp->num_planes; i++)
280 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
281 mp->plane_fmt[i].bytesperline,
282 mp->plane_fmt[i].sizeimage);
283 break;
284 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
285 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
286 win = &p->fmt.win;
287 /* Note: we can't print the clip list here since the clips
288 * pointer is a userspace pointer, not a kernelspace
289 * pointer. */
290 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",
291 win->w.width, win->w.height, win->w.left, win->w.top,
292 prt_names(win->field, v4l2_field_names),
293 win->chromakey, win->clipcount, win->clips,
294 win->bitmap, win->global_alpha);
295 break;
296 case V4L2_BUF_TYPE_VBI_CAPTURE:
297 case V4L2_BUF_TYPE_VBI_OUTPUT:
298 vbi = &p->fmt.vbi;
299 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
300 vbi->sampling_rate, vbi->offset,
301 vbi->samples_per_line,
302 (vbi->sample_format & 0xff),
303 (vbi->sample_format >> 8) & 0xff,
304 (vbi->sample_format >> 16) & 0xff,
305 (vbi->sample_format >> 24) & 0xff,
306 vbi->start[0], vbi->start[1],
307 vbi->count[0], vbi->count[1]);
308 break;
309 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
310 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
311 sliced = &p->fmt.sliced;
312 pr_cont(", service_set=0x%08x, io_size=%d\n",
313 sliced->service_set, sliced->io_size);
314 for (i = 0; i < 24; i++)
315 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
316 sliced->service_lines[0][i],
317 sliced->service_lines[1][i]);
318 break;
319 case V4L2_BUF_TYPE_SDR_CAPTURE:
320 case V4L2_BUF_TYPE_SDR_OUTPUT:
321 sdr = &p->fmt.sdr;
322 pr_cont(", pixelformat=%c%c%c%c\n",
323 (sdr->pixelformat >> 0) & 0xff,
324 (sdr->pixelformat >> 8) & 0xff,
325 (sdr->pixelformat >> 16) & 0xff,
326 (sdr->pixelformat >> 24) & 0xff);
327 break;
328 }
329 }
330
331 static void v4l_print_framebuffer(const void *arg, bool write_only)
332 {
333 const struct v4l2_framebuffer *p = arg;
334
335 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
336 p->capability, p->flags, p->base,
337 p->fmt.width, p->fmt.height,
338 (p->fmt.pixelformat & 0xff),
339 (p->fmt.pixelformat >> 8) & 0xff,
340 (p->fmt.pixelformat >> 16) & 0xff,
341 (p->fmt.pixelformat >> 24) & 0xff,
342 p->fmt.bytesperline, p->fmt.sizeimage,
343 p->fmt.colorspace);
344 }
345
346 static void v4l_print_buftype(const void *arg, bool write_only)
347 {
348 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
349 }
350
351 static void v4l_print_modulator(const void *arg, bool write_only)
352 {
353 const struct v4l2_modulator *p = arg;
354
355 if (write_only)
356 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
357 else
358 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
359 p->index, (int)sizeof(p->name), p->name, p->capability,
360 p->rangelow, p->rangehigh, p->txsubchans);
361 }
362
363 static void v4l_print_tuner(const void *arg, bool write_only)
364 {
365 const struct v4l2_tuner *p = arg;
366
367 if (write_only)
368 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
369 else
370 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
371 p->index, (int)sizeof(p->name), p->name, p->type,
372 p->capability, p->rangelow,
373 p->rangehigh, p->signal, p->afc,
374 p->rxsubchans, p->audmode);
375 }
376
377 static void v4l_print_frequency(const void *arg, bool write_only)
378 {
379 const struct v4l2_frequency *p = arg;
380
381 pr_cont("tuner=%u, type=%u, frequency=%u\n",
382 p->tuner, p->type, p->frequency);
383 }
384
385 static void v4l_print_standard(const void *arg, bool write_only)
386 {
387 const struct v4l2_standard *p = arg;
388
389 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
390 p->index,
391 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
392 p->frameperiod.numerator,
393 p->frameperiod.denominator,
394 p->framelines);
395 }
396
397 static void v4l_print_std(const void *arg, bool write_only)
398 {
399 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
400 }
401
402 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
403 {
404 const struct v4l2_hw_freq_seek *p = arg;
405
406 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
407 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
408 p->rangelow, p->rangehigh);
409 }
410
411 static void v4l_print_requestbuffers(const void *arg, bool write_only)
412 {
413 const struct v4l2_requestbuffers *p = arg;
414
415 pr_cont("count=%d, type=%s, memory=%s\n",
416 p->count,
417 prt_names(p->type, v4l2_type_names),
418 prt_names(p->memory, v4l2_memory_names));
419 }
420
421 static void v4l_print_buffer(const void *arg, bool write_only)
422 {
423 const struct v4l2_buffer *p = arg;
424 const struct v4l2_timecode *tc = &p->timecode;
425 const struct v4l2_plane *plane;
426 int i;
427
428 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
429 p->timestamp.tv_sec / 3600,
430 (int)(p->timestamp.tv_sec / 60) % 60,
431 (int)(p->timestamp.tv_sec % 60),
432 (long)p->timestamp.tv_usec,
433 p->index,
434 prt_names(p->type, v4l2_type_names),
435 p->flags, prt_names(p->field, v4l2_field_names),
436 p->sequence, prt_names(p->memory, v4l2_memory_names));
437
438 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
439 pr_cont("\n");
440 for (i = 0; i < p->length; ++i) {
441 plane = &p->m.planes[i];
442 printk(KERN_DEBUG
443 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
444 i, plane->bytesused, plane->data_offset,
445 plane->m.userptr, plane->length);
446 }
447 } else {
448 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
449 p->bytesused, p->m.userptr, p->length);
450 }
451
452 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
453 tc->hours, tc->minutes, tc->seconds,
454 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
455 }
456
457 static void v4l_print_exportbuffer(const void *arg, bool write_only)
458 {
459 const struct v4l2_exportbuffer *p = arg;
460
461 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
462 p->fd, prt_names(p->type, v4l2_type_names),
463 p->index, p->plane, p->flags);
464 }
465
466 static void v4l_print_create_buffers(const void *arg, bool write_only)
467 {
468 const struct v4l2_create_buffers *p = arg;
469
470 pr_cont("index=%d, count=%d, memory=%s, ",
471 p->index, p->count,
472 prt_names(p->memory, v4l2_memory_names));
473 v4l_print_format(&p->format, write_only);
474 }
475
476 static void v4l_print_streamparm(const void *arg, bool write_only)
477 {
478 const struct v4l2_streamparm *p = arg;
479
480 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
481
482 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
483 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
484 const struct v4l2_captureparm *c = &p->parm.capture;
485
486 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
487 c->capability, c->capturemode,
488 c->timeperframe.numerator, c->timeperframe.denominator,
489 c->extendedmode, c->readbuffers);
490 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
491 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
492 const struct v4l2_outputparm *c = &p->parm.output;
493
494 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
495 c->capability, c->outputmode,
496 c->timeperframe.numerator, c->timeperframe.denominator,
497 c->extendedmode, c->writebuffers);
498 } else {
499 pr_cont("\n");
500 }
501 }
502
503 static void v4l_print_queryctrl(const void *arg, bool write_only)
504 {
505 const struct v4l2_queryctrl *p = arg;
506
507 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
508 p->id, p->type, (int)sizeof(p->name), p->name,
509 p->minimum, p->maximum,
510 p->step, p->default_value, p->flags);
511 }
512
513 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
514 {
515 const struct v4l2_query_ext_ctrl *p = arg;
516
517 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
518 p->id, p->type, (int)sizeof(p->name), p->name,
519 p->minimum, p->maximum,
520 p->step, p->default_value, p->flags,
521 p->elem_size, p->elems, p->nr_of_dims,
522 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
523 }
524
525 static void v4l_print_querymenu(const void *arg, bool write_only)
526 {
527 const struct v4l2_querymenu *p = arg;
528
529 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
530 }
531
532 static void v4l_print_control(const void *arg, bool write_only)
533 {
534 const struct v4l2_control *p = arg;
535
536 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
537 }
538
539 static void v4l_print_ext_controls(const void *arg, bool write_only)
540 {
541 const struct v4l2_ext_controls *p = arg;
542 int i;
543
544 pr_cont("which=0x%x, count=%d, error_idx=%d",
545 p->which, p->count, p->error_idx);
546 for (i = 0; i < p->count; i++) {
547 if (!p->controls[i].size)
548 pr_cont(", id/val=0x%x/0x%x",
549 p->controls[i].id, p->controls[i].value);
550 else
551 pr_cont(", id/size=0x%x/%u",
552 p->controls[i].id, p->controls[i].size);
553 }
554 pr_cont("\n");
555 }
556
557 static void v4l_print_cropcap(const void *arg, bool write_only)
558 {
559 const struct v4l2_cropcap *p = arg;
560
561 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
562 prt_names(p->type, v4l2_type_names),
563 p->bounds.width, p->bounds.height,
564 p->bounds.left, p->bounds.top,
565 p->defrect.width, p->defrect.height,
566 p->defrect.left, p->defrect.top,
567 p->pixelaspect.numerator, p->pixelaspect.denominator);
568 }
569
570 static void v4l_print_crop(const void *arg, bool write_only)
571 {
572 const struct v4l2_crop *p = arg;
573
574 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
575 prt_names(p->type, v4l2_type_names),
576 p->c.width, p->c.height,
577 p->c.left, p->c.top);
578 }
579
580 static void v4l_print_selection(const void *arg, bool write_only)
581 {
582 const struct v4l2_selection *p = arg;
583
584 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
585 prt_names(p->type, v4l2_type_names),
586 p->target, p->flags,
587 p->r.width, p->r.height, p->r.left, p->r.top);
588 }
589
590 static void v4l_print_jpegcompression(const void *arg, bool write_only)
591 {
592 const struct v4l2_jpegcompression *p = arg;
593
594 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
595 p->quality, p->APPn, p->APP_len,
596 p->COM_len, p->jpeg_markers);
597 }
598
599 static void v4l_print_enc_idx(const void *arg, bool write_only)
600 {
601 const struct v4l2_enc_idx *p = arg;
602
603 pr_cont("entries=%d, entries_cap=%d\n",
604 p->entries, p->entries_cap);
605 }
606
607 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
608 {
609 const struct v4l2_encoder_cmd *p = arg;
610
611 pr_cont("cmd=%d, flags=0x%x\n",
612 p->cmd, p->flags);
613 }
614
615 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
616 {
617 const struct v4l2_decoder_cmd *p = arg;
618
619 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
620
621 if (p->cmd == V4L2_DEC_CMD_START)
622 pr_info("speed=%d, format=%u\n",
623 p->start.speed, p->start.format);
624 else if (p->cmd == V4L2_DEC_CMD_STOP)
625 pr_info("pts=%llu\n", p->stop.pts);
626 }
627
628 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
629 {
630 const struct v4l2_dbg_chip_info *p = arg;
631
632 pr_cont("type=%u, ", p->match.type);
633 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
634 pr_cont("name=%.*s, ",
635 (int)sizeof(p->match.name), p->match.name);
636 else
637 pr_cont("addr=%u, ", p->match.addr);
638 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
639 }
640
641 static void v4l_print_dbg_register(const void *arg, bool write_only)
642 {
643 const struct v4l2_dbg_register *p = arg;
644
645 pr_cont("type=%u, ", p->match.type);
646 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
647 pr_cont("name=%.*s, ",
648 (int)sizeof(p->match.name), p->match.name);
649 else
650 pr_cont("addr=%u, ", p->match.addr);
651 pr_cont("reg=0x%llx, val=0x%llx\n",
652 p->reg, p->val);
653 }
654
655 static void v4l_print_dv_timings(const void *arg, bool write_only)
656 {
657 const struct v4l2_dv_timings *p = arg;
658
659 switch (p->type) {
660 case V4L2_DV_BT_656_1120:
661 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
662 p->bt.interlaced, p->bt.pixelclock,
663 p->bt.width, p->bt.height,
664 p->bt.polarities, p->bt.hfrontporch,
665 p->bt.hsync, p->bt.hbackporch,
666 p->bt.vfrontporch, p->bt.vsync,
667 p->bt.vbackporch, p->bt.il_vfrontporch,
668 p->bt.il_vsync, p->bt.il_vbackporch,
669 p->bt.standards, p->bt.flags);
670 break;
671 default:
672 pr_cont("type=%d\n", p->type);
673 break;
674 }
675 }
676
677 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
678 {
679 const struct v4l2_enum_dv_timings *p = arg;
680
681 pr_cont("index=%u, ", p->index);
682 v4l_print_dv_timings(&p->timings, write_only);
683 }
684
685 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
686 {
687 const struct v4l2_dv_timings_cap *p = arg;
688
689 switch (p->type) {
690 case V4L2_DV_BT_656_1120:
691 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
692 p->bt.min_width, p->bt.max_width,
693 p->bt.min_height, p->bt.max_height,
694 p->bt.min_pixelclock, p->bt.max_pixelclock,
695 p->bt.standards, p->bt.capabilities);
696 break;
697 default:
698 pr_cont("type=%u\n", p->type);
699 break;
700 }
701 }
702
703 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
704 {
705 const struct v4l2_frmsizeenum *p = arg;
706
707 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
708 p->index,
709 (p->pixel_format & 0xff),
710 (p->pixel_format >> 8) & 0xff,
711 (p->pixel_format >> 16) & 0xff,
712 (p->pixel_format >> 24) & 0xff,
713 p->type);
714 switch (p->type) {
715 case V4L2_FRMSIZE_TYPE_DISCRETE:
716 pr_cont(", wxh=%ux%u\n",
717 p->discrete.width, p->discrete.height);
718 break;
719 case V4L2_FRMSIZE_TYPE_STEPWISE:
720 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
721 p->stepwise.min_width, p->stepwise.min_height,
722 p->stepwise.step_width, p->stepwise.step_height,
723 p->stepwise.max_width, p->stepwise.max_height);
724 break;
725 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
726 /* fall through */
727 default:
728 pr_cont("\n");
729 break;
730 }
731 }
732
733 static void v4l_print_frmivalenum(const void *arg, bool write_only)
734 {
735 const struct v4l2_frmivalenum *p = arg;
736
737 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
738 p->index,
739 (p->pixel_format & 0xff),
740 (p->pixel_format >> 8) & 0xff,
741 (p->pixel_format >> 16) & 0xff,
742 (p->pixel_format >> 24) & 0xff,
743 p->width, p->height, p->type);
744 switch (p->type) {
745 case V4L2_FRMIVAL_TYPE_DISCRETE:
746 pr_cont(", fps=%d/%d\n",
747 p->discrete.numerator,
748 p->discrete.denominator);
749 break;
750 case V4L2_FRMIVAL_TYPE_STEPWISE:
751 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
752 p->stepwise.min.numerator,
753 p->stepwise.min.denominator,
754 p->stepwise.max.numerator,
755 p->stepwise.max.denominator,
756 p->stepwise.step.numerator,
757 p->stepwise.step.denominator);
758 break;
759 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
760 /* fall through */
761 default:
762 pr_cont("\n");
763 break;
764 }
765 }
766
767 static void v4l_print_event(const void *arg, bool write_only)
768 {
769 const struct v4l2_event *p = arg;
770 const struct v4l2_event_ctrl *c;
771
772 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
773 p->type, p->pending, p->sequence, p->id,
774 p->timestamp.tv_sec, p->timestamp.tv_nsec);
775 switch (p->type) {
776 case V4L2_EVENT_VSYNC:
777 printk(KERN_DEBUG "field=%s\n",
778 prt_names(p->u.vsync.field, v4l2_field_names));
779 break;
780 case V4L2_EVENT_CTRL:
781 c = &p->u.ctrl;
782 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
783 c->changes, c->type);
784 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
785 pr_cont("value64=%lld, ", c->value64);
786 else
787 pr_cont("value=%d, ", c->value);
788 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
789 c->flags, c->minimum, c->maximum,
790 c->step, c->default_value);
791 break;
792 case V4L2_EVENT_FRAME_SYNC:
793 pr_cont("frame_sequence=%u\n",
794 p->u.frame_sync.frame_sequence);
795 break;
796 }
797 }
798
799 static void v4l_print_event_subscription(const void *arg, bool write_only)
800 {
801 const struct v4l2_event_subscription *p = arg;
802
803 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
804 p->type, p->id, p->flags);
805 }
806
807 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
808 {
809 const struct v4l2_sliced_vbi_cap *p = arg;
810 int i;
811
812 pr_cont("type=%s, service_set=0x%08x\n",
813 prt_names(p->type, v4l2_type_names), p->service_set);
814 for (i = 0; i < 24; i++)
815 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
816 p->service_lines[0][i],
817 p->service_lines[1][i]);
818 }
819
820 static void v4l_print_freq_band(const void *arg, bool write_only)
821 {
822 const struct v4l2_frequency_band *p = arg;
823
824 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
825 p->tuner, p->type, p->index,
826 p->capability, p->rangelow,
827 p->rangehigh, p->modulation);
828 }
829
830 static void v4l_print_edid(const void *arg, bool write_only)
831 {
832 const struct v4l2_edid *p = arg;
833
834 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
835 p->pad, p->start_block, p->blocks);
836 }
837
838 static void v4l_print_u32(const void *arg, bool write_only)
839 {
840 pr_cont("value=%u\n", *(const u32 *)arg);
841 }
842
843 static void v4l_print_newline(const void *arg, bool write_only)
844 {
845 pr_cont("\n");
846 }
847
848 static void v4l_print_default(const void *arg, bool write_only)
849 {
850 pr_cont("driver-specific ioctl\n");
851 }
852
853 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
854 {
855 __u32 i;
856
857 /* zero the reserved fields */
858 c->reserved[0] = c->reserved[1] = 0;
859 for (i = 0; i < c->count; i++)
860 c->controls[i].reserved2[0] = 0;
861
862 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
863 when using extended controls.
864 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
865 is it allowed for backwards compatibility.
866 */
867 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
868 return 0;
869 if (!c->which)
870 return 1;
871 /* Check that all controls are from the same control class. */
872 for (i = 0; i < c->count; i++) {
873 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
874 c->error_idx = i;
875 return 0;
876 }
877 }
878 return 1;
879 }
880
881 static int check_fmt(struct file *file, enum v4l2_buf_type type)
882 {
883 struct video_device *vfd = video_devdata(file);
884 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
885 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
886 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
887 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
888 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
889 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
890 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
891
892 if (ops == NULL)
893 return -EINVAL;
894
895 switch (type) {
896 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
897 if ((is_vid || is_tch) && is_rx &&
898 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
899 return 0;
900 break;
901 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
902 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
903 return 0;
904 break;
905 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
906 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
907 return 0;
908 break;
909 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
910 if (is_vid && is_tx &&
911 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
912 return 0;
913 break;
914 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
915 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
916 return 0;
917 break;
918 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
919 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
920 return 0;
921 break;
922 case V4L2_BUF_TYPE_VBI_CAPTURE:
923 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
924 return 0;
925 break;
926 case V4L2_BUF_TYPE_VBI_OUTPUT:
927 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
928 return 0;
929 break;
930 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
931 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
932 return 0;
933 break;
934 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
935 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
936 return 0;
937 break;
938 case V4L2_BUF_TYPE_SDR_CAPTURE:
939 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
940 return 0;
941 break;
942 case V4L2_BUF_TYPE_SDR_OUTPUT:
943 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
944 return 0;
945 break;
946 default:
947 break;
948 }
949 return -EINVAL;
950 }
951
952 static void v4l_sanitize_format(struct v4l2_format *fmt)
953 {
954 unsigned int offset;
955
956 /*
957 * The v4l2_pix_format structure has been extended with fields that were
958 * not previously required to be set to zero by applications. The priv
959 * field, when set to a magic value, indicates the the extended fields
960 * are valid. Otherwise they will contain undefined values. To simplify
961 * the API towards drivers zero the extended fields and set the priv
962 * field to the magic value when the extended pixel format structure
963 * isn't used by applications.
964 */
965
966 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
967 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
968 return;
969
970 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
971 return;
972
973 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
974
975 offset = offsetof(struct v4l2_pix_format, priv)
976 + sizeof(fmt->fmt.pix.priv);
977 memset(((void *)&fmt->fmt.pix) + offset, 0,
978 sizeof(fmt->fmt.pix) - offset);
979 }
980
981 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
982 struct file *file, void *fh, void *arg)
983 {
984 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
985 struct video_device *vfd = video_devdata(file);
986 int ret;
987
988 cap->version = LINUX_VERSION_CODE;
989 cap->device_caps = vfd->device_caps;
990 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
991
992 ret = ops->vidioc_querycap(file, fh, cap);
993
994 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
995 /*
996 * Drivers MUST fill in device_caps, so check for this and
997 * warn if it was forgotten.
998 */
999 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1000 !cap->device_caps, "Bad caps for driver %s, %x %x",
1001 cap->driver, cap->capabilities, cap->device_caps);
1002 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1003
1004 return ret;
1005 }
1006
1007 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1008 struct file *file, void *fh, void *arg)
1009 {
1010 struct video_device *vfd = video_devdata(file);
1011 int ret;
1012
1013 ret = v4l_enable_media_source(vfd);
1014 if (ret)
1015 return ret;
1016 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1017 }
1018
1019 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1020 struct file *file, void *fh, void *arg)
1021 {
1022 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1023 }
1024
1025 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1026 struct file *file, void *fh, void *arg)
1027 {
1028 struct video_device *vfd;
1029 u32 *p = arg;
1030
1031 vfd = video_devdata(file);
1032 *p = v4l2_prio_max(vfd->prio);
1033 return 0;
1034 }
1035
1036 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1037 struct file *file, void *fh, void *arg)
1038 {
1039 struct video_device *vfd;
1040 struct v4l2_fh *vfh;
1041 u32 *p = arg;
1042
1043 vfd = video_devdata(file);
1044 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1045 return -ENOTTY;
1046 vfh = file->private_data;
1047 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1048 }
1049
1050 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1051 struct file *file, void *fh, void *arg)
1052 {
1053 struct video_device *vfd = video_devdata(file);
1054 struct v4l2_input *p = arg;
1055
1056 /*
1057 * We set the flags for CAP_DV_TIMINGS &
1058 * CAP_STD here based on ioctl handler provided by the
1059 * driver. If the driver doesn't support these
1060 * for a specific input, it must override these flags.
1061 */
1062 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1063 p->capabilities |= V4L2_IN_CAP_STD;
1064
1065 return ops->vidioc_enum_input(file, fh, p);
1066 }
1067
1068 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1069 struct file *file, void *fh, void *arg)
1070 {
1071 struct video_device *vfd = video_devdata(file);
1072 struct v4l2_output *p = arg;
1073
1074 /*
1075 * We set the flags for CAP_DV_TIMINGS &
1076 * CAP_STD here based on ioctl handler provided by the
1077 * driver. If the driver doesn't support these
1078 * for a specific output, it must override these flags.
1079 */
1080 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1081 p->capabilities |= V4L2_OUT_CAP_STD;
1082
1083 return ops->vidioc_enum_output(file, fh, p);
1084 }
1085
1086 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1087 {
1088 const unsigned sz = sizeof(fmt->description);
1089 const char *descr = NULL;
1090 u32 flags = 0;
1091
1092 /*
1093 * We depart from the normal coding style here since the descriptions
1094 * should be aligned so it is easy to see which descriptions will be
1095 * longer than 31 characters (the max length for a description).
1096 * And frankly, this is easier to read anyway.
1097 *
1098 * Note that gcc will use O(log N) comparisons to find the right case.
1099 */
1100 switch (fmt->pixelformat) {
1101 /* Max description length mask: descr = "0123456789012345678901234567890" */
1102 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1103 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1104 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1105 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1106 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1107 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1108 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1109 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1110 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1111 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1112 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1113 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1114 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1115 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1116 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1117 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1118 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1119 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1120 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1121 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1122 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1123 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1124 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1125 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1126 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1127 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1128 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1129 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1130 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1131 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1132 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1133 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1134 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1135 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1136 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1137 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1138 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1139 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1140 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1141 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1142 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1143 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1144 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1145 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1146 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1147 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1148 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1149 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1150 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1151 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1152 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1153 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1154 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1155 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1156 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1157 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1158 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1159 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1160 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1161 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1162 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1163 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1164 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1165 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1166 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1167 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1168 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1169 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1170 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1171 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1172 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1173 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1174 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1175 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1176 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1177 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1178 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1179 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1180 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1181 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1182 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1183 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1184 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1185 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1186 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1187 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1188 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1189 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1190 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1191 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1192 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1193 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1194 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1195 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1196 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1197 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1198 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1199 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1200 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1201 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1202 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1203 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1204 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1205 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1206 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1207 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1208 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1209 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1210 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1211 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1212 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1213 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1214 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1215 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1216 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break;
1217 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break;
1218 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break;
1219 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break;
1220
1221 default:
1222 /* Compressed formats */
1223 flags = V4L2_FMT_FLAG_COMPRESSED;
1224 switch (fmt->pixelformat) {
1225 /* Max description length mask: descr = "0123456789012345678901234567890" */
1226 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1227 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1228 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1229 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1230 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1231 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1232 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1233 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1234 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1235 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1236 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break;
1237 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1238 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1239 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1240 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1241 case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1242 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1243 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1244 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1245 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1246 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1247 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1248 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1249 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1250 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1251 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1252 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1253 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1254 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1255 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1256 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1257 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1258 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1259 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1260 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1261 default:
1262 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1263 if (fmt->description[0])
1264 return;
1265 flags = 0;
1266 snprintf(fmt->description, sz, "%c%c%c%c%s",
1267 (char)(fmt->pixelformat & 0x7f),
1268 (char)((fmt->pixelformat >> 8) & 0x7f),
1269 (char)((fmt->pixelformat >> 16) & 0x7f),
1270 (char)((fmt->pixelformat >> 24) & 0x7f),
1271 (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1272 break;
1273 }
1274 }
1275
1276 if (descr)
1277 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1278 fmt->flags = flags;
1279 }
1280
1281 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1282 struct file *file, void *fh, void *arg)
1283 {
1284 struct v4l2_fmtdesc *p = arg;
1285 struct video_device *vfd = video_devdata(file);
1286 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1287 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1288 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1289 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1290 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1291 int ret = -EINVAL;
1292
1293 switch (p->type) {
1294 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1295 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
1296 break;
1297 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1298 break;
1299 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1300 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
1301 break;
1302 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1303 break;
1304 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1305 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
1306 break;
1307 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1308 break;
1309 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1310 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
1311 break;
1312 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1313 break;
1314 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1315 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
1316 break;
1317 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1318 break;
1319 case V4L2_BUF_TYPE_SDR_CAPTURE:
1320 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
1321 break;
1322 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1323 break;
1324 case V4L2_BUF_TYPE_SDR_OUTPUT:
1325 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
1326 break;
1327 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1328 break;
1329 }
1330 if (ret == 0)
1331 v4l_fill_fmtdesc(p);
1332 return ret;
1333 }
1334
1335 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1336 struct file *file, void *fh, void *arg)
1337 {
1338 struct v4l2_format *p = arg;
1339 struct video_device *vfd = video_devdata(file);
1340 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1341 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1342 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1343 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1344 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1345 int ret;
1346
1347 /*
1348 * fmt can't be cleared for these overlay types due to the 'clips'
1349 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1350 * Those are provided by the user. So handle these two overlay types
1351 * first, and then just do a simple memset for the other types.
1352 */
1353 switch (p->type) {
1354 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1355 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1356 struct v4l2_clip __user *clips = p->fmt.win.clips;
1357 u32 clipcount = p->fmt.win.clipcount;
1358 void __user *bitmap = p->fmt.win.bitmap;
1359
1360 memset(&p->fmt, 0, sizeof(p->fmt));
1361 p->fmt.win.clips = clips;
1362 p->fmt.win.clipcount = clipcount;
1363 p->fmt.win.bitmap = bitmap;
1364 break;
1365 }
1366 default:
1367 memset(&p->fmt, 0, sizeof(p->fmt));
1368 break;
1369 }
1370
1371 switch (p->type) {
1372 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1373 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
1374 break;
1375 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1376 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1377 /* just in case the driver zeroed it again */
1378 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1379 return ret;
1380 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1381 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1382 break;
1383 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1384 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1385 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1386 break;
1387 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1388 case V4L2_BUF_TYPE_VBI_CAPTURE:
1389 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1390 break;
1391 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1392 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1393 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1394 break;
1395 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1396 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1397 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1398 break;
1399 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1400 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1401 /* just in case the driver zeroed it again */
1402 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1403 return ret;
1404 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1405 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1406 break;
1407 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1408 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1409 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1410 break;
1411 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1412 case V4L2_BUF_TYPE_VBI_OUTPUT:
1413 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1414 break;
1415 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1416 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1417 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1418 break;
1419 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1420 case V4L2_BUF_TYPE_SDR_CAPTURE:
1421 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
1422 break;
1423 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1424 case V4L2_BUF_TYPE_SDR_OUTPUT:
1425 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
1426 break;
1427 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1428 }
1429 return -EINVAL;
1430 }
1431
1432 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1433 {
1434 /*
1435 * The v4l2_pix_format structure contains fields that make no sense for
1436 * touch. Set them to default values in this case.
1437 */
1438
1439 p->field = V4L2_FIELD_NONE;
1440 p->colorspace = V4L2_COLORSPACE_RAW;
1441 p->flags = 0;
1442 p->ycbcr_enc = 0;
1443 p->quantization = 0;
1444 p->xfer_func = 0;
1445 }
1446
1447 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1448 struct file *file, void *fh, void *arg)
1449 {
1450 struct v4l2_format *p = arg;
1451 struct video_device *vfd = video_devdata(file);
1452 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1453 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1454 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
1455 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1456 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1457 int ret;
1458
1459 ret = v4l_enable_media_source(vfd);
1460 if (ret)
1461 return ret;
1462 v4l_sanitize_format(p);
1463
1464 switch (p->type) {
1465 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1466 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
1467 break;
1468 CLEAR_AFTER_FIELD(p, fmt.pix);
1469 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1470 /* just in case the driver zeroed it again */
1471 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1472 if (is_tch)
1473 v4l_pix_format_touch(&p->fmt.pix);
1474 return ret;
1475 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1476 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1477 break;
1478 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1479 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1480 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1481 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1482 break;
1483 CLEAR_AFTER_FIELD(p, fmt.win);
1484 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1485 case V4L2_BUF_TYPE_VBI_CAPTURE:
1486 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1487 break;
1488 CLEAR_AFTER_FIELD(p, fmt.vbi);
1489 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1490 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1491 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1492 break;
1493 CLEAR_AFTER_FIELD(p, fmt.sliced);
1494 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1495 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1496 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1497 break;
1498 CLEAR_AFTER_FIELD(p, fmt.pix);
1499 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1500 /* just in case the driver zeroed it again */
1501 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1502 return ret;
1503 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1504 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1505 break;
1506 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1507 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1508 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1509 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1510 break;
1511 CLEAR_AFTER_FIELD(p, fmt.win);
1512 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1513 case V4L2_BUF_TYPE_VBI_OUTPUT:
1514 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1515 break;
1516 CLEAR_AFTER_FIELD(p, fmt.vbi);
1517 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1518 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1519 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1520 break;
1521 CLEAR_AFTER_FIELD(p, fmt.sliced);
1522 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1523 case V4L2_BUF_TYPE_SDR_CAPTURE:
1524 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
1525 break;
1526 CLEAR_AFTER_FIELD(p, fmt.sdr);
1527 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1528 case V4L2_BUF_TYPE_SDR_OUTPUT:
1529 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
1530 break;
1531 CLEAR_AFTER_FIELD(p, fmt.sdr);
1532 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1533 }
1534 return -EINVAL;
1535 }
1536
1537 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1538 struct file *file, void *fh, void *arg)
1539 {
1540 struct v4l2_format *p = arg;
1541 struct video_device *vfd = video_devdata(file);
1542 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1543 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
1544 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
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 && !is_tch) || !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.xfer_func);
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.xfer_func);
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 struct v4l2_selection s = { .type = p->type };
2161 int ret = 0;
2162
2163 /* setting trivial pixelaspect */
2164 p->pixelaspect.numerator = 1;
2165 p->pixelaspect.denominator = 1;
2166
2167 /*
2168 * The determine_valid_ioctls() call already should ensure
2169 * that this can never happen, but just in case...
2170 */
2171 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2172 return -ENOTTY;
2173
2174 if (ops->vidioc_cropcap)
2175 ret = ops->vidioc_cropcap(file, fh, p);
2176
2177 if (!ops->vidioc_g_selection)
2178 return ret;
2179
2180 /*
2181 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2182 * square pixel aspect ratio in that case.
2183 */
2184 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2185 return ret;
2186
2187 /* Use g_selection() to fill in the bounds and defrect rectangles */
2188
2189 /* obtaining bounds */
2190 if (V4L2_TYPE_IS_OUTPUT(p->type))
2191 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2192 else
2193 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2194
2195 ret = ops->vidioc_g_selection(file, fh, &s);
2196 if (ret)
2197 return ret;
2198 p->bounds = s.r;
2199
2200 /* obtaining defrect */
2201 if (V4L2_TYPE_IS_OUTPUT(p->type))
2202 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2203 else
2204 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2205
2206 ret = ops->vidioc_g_selection(file, fh, &s);
2207 if (ret)
2208 return ret;
2209 p->defrect = s.r;
2210
2211 return 0;
2212 }
2213
2214 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2215 struct file *file, void *fh, void *arg)
2216 {
2217 struct video_device *vfd = video_devdata(file);
2218 int ret;
2219
2220 if (vfd->v4l2_dev)
2221 pr_info("%s: ================= START STATUS =================\n",
2222 vfd->v4l2_dev->name);
2223 ret = ops->vidioc_log_status(file, fh);
2224 if (vfd->v4l2_dev)
2225 pr_info("%s: ================== END STATUS ==================\n",
2226 vfd->v4l2_dev->name);
2227 return ret;
2228 }
2229
2230 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2231 struct file *file, void *fh, void *arg)
2232 {
2233 #ifdef CONFIG_VIDEO_ADV_DEBUG
2234 struct v4l2_dbg_register *p = arg;
2235 struct video_device *vfd = video_devdata(file);
2236 struct v4l2_subdev *sd;
2237 int idx = 0;
2238
2239 if (!capable(CAP_SYS_ADMIN))
2240 return -EPERM;
2241 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2242 if (vfd->v4l2_dev == NULL)
2243 return -EINVAL;
2244 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2245 if (p->match.addr == idx++)
2246 return v4l2_subdev_call(sd, core, g_register, p);
2247 return -EINVAL;
2248 }
2249 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2250 (ops->vidioc_g_chip_info || p->match.addr == 0))
2251 return ops->vidioc_g_register(file, fh, p);
2252 return -EINVAL;
2253 #else
2254 return -ENOTTY;
2255 #endif
2256 }
2257
2258 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2259 struct file *file, void *fh, void *arg)
2260 {
2261 #ifdef CONFIG_VIDEO_ADV_DEBUG
2262 const struct v4l2_dbg_register *p = arg;
2263 struct video_device *vfd = video_devdata(file);
2264 struct v4l2_subdev *sd;
2265 int idx = 0;
2266
2267 if (!capable(CAP_SYS_ADMIN))
2268 return -EPERM;
2269 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2270 if (vfd->v4l2_dev == NULL)
2271 return -EINVAL;
2272 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2273 if (p->match.addr == idx++)
2274 return v4l2_subdev_call(sd, core, s_register, p);
2275 return -EINVAL;
2276 }
2277 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2278 (ops->vidioc_g_chip_info || p->match.addr == 0))
2279 return ops->vidioc_s_register(file, fh, p);
2280 return -EINVAL;
2281 #else
2282 return -ENOTTY;
2283 #endif
2284 }
2285
2286 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2287 struct file *file, void *fh, void *arg)
2288 {
2289 #ifdef CONFIG_VIDEO_ADV_DEBUG
2290 struct video_device *vfd = video_devdata(file);
2291 struct v4l2_dbg_chip_info *p = arg;
2292 struct v4l2_subdev *sd;
2293 int idx = 0;
2294
2295 switch (p->match.type) {
2296 case V4L2_CHIP_MATCH_BRIDGE:
2297 if (ops->vidioc_s_register)
2298 p->flags |= V4L2_CHIP_FL_WRITABLE;
2299 if (ops->vidioc_g_register)
2300 p->flags |= V4L2_CHIP_FL_READABLE;
2301 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2302 if (ops->vidioc_g_chip_info)
2303 return ops->vidioc_g_chip_info(file, fh, arg);
2304 if (p->match.addr)
2305 return -EINVAL;
2306 return 0;
2307
2308 case V4L2_CHIP_MATCH_SUBDEV:
2309 if (vfd->v4l2_dev == NULL)
2310 break;
2311 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2312 if (p->match.addr != idx++)
2313 continue;
2314 if (sd->ops->core && sd->ops->core->s_register)
2315 p->flags |= V4L2_CHIP_FL_WRITABLE;
2316 if (sd->ops->core && sd->ops->core->g_register)
2317 p->flags |= V4L2_CHIP_FL_READABLE;
2318 strlcpy(p->name, sd->name, sizeof(p->name));
2319 return 0;
2320 }
2321 break;
2322 }
2323 return -EINVAL;
2324 #else
2325 return -ENOTTY;
2326 #endif
2327 }
2328
2329 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2330 struct file *file, void *fh, void *arg)
2331 {
2332 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2333 }
2334
2335 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2336 struct file *file, void *fh, void *arg)
2337 {
2338 return ops->vidioc_subscribe_event(fh, arg);
2339 }
2340
2341 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2342 struct file *file, void *fh, void *arg)
2343 {
2344 return ops->vidioc_unsubscribe_event(fh, arg);
2345 }
2346
2347 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2348 struct file *file, void *fh, void *arg)
2349 {
2350 struct v4l2_sliced_vbi_cap *p = arg;
2351 int ret = check_fmt(file, p->type);
2352
2353 if (ret)
2354 return ret;
2355
2356 /* Clear up to type, everything after type is zeroed already */
2357 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2358
2359 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2360 }
2361
2362 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2363 struct file *file, void *fh, void *arg)
2364 {
2365 struct video_device *vfd = video_devdata(file);
2366 struct v4l2_frequency_band *p = arg;
2367 enum v4l2_tuner_type type;
2368 int err;
2369
2370 if (vfd->vfl_type == VFL_TYPE_SDR) {
2371 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2372 return -EINVAL;
2373 type = p->type;
2374 } else {
2375 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2376 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2377 if (type != p->type)
2378 return -EINVAL;
2379 }
2380 if (ops->vidioc_enum_freq_bands) {
2381 err = ops->vidioc_enum_freq_bands(file, fh, p);
2382 if (err != -ENOTTY)
2383 return err;
2384 }
2385 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2386 struct v4l2_tuner t = {
2387 .index = p->tuner,
2388 .type = type,
2389 };
2390
2391 if (p->index)
2392 return -EINVAL;
2393 err = ops->vidioc_g_tuner(file, fh, &t);
2394 if (err)
2395 return err;
2396 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2397 p->rangelow = t.rangelow;
2398 p->rangehigh = t.rangehigh;
2399 p->modulation = (type == V4L2_TUNER_RADIO) ?
2400 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2401 return 0;
2402 }
2403 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2404 struct v4l2_modulator m = {
2405 .index = p->tuner,
2406 };
2407
2408 if (type != V4L2_TUNER_RADIO)
2409 return -EINVAL;
2410 if (p->index)
2411 return -EINVAL;
2412 err = ops->vidioc_g_modulator(file, fh, &m);
2413 if (err)
2414 return err;
2415 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2416 p->rangelow = m.rangelow;
2417 p->rangehigh = m.rangehigh;
2418 p->modulation = (type == V4L2_TUNER_RADIO) ?
2419 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2420 return 0;
2421 }
2422 return -ENOTTY;
2423 }
2424
2425 struct v4l2_ioctl_info {
2426 unsigned int ioctl;
2427 u32 flags;
2428 const char * const name;
2429 union {
2430 u32 offset;
2431 int (*func)(const struct v4l2_ioctl_ops *ops,
2432 struct file *file, void *fh, void *p);
2433 } u;
2434 void (*debug)(const void *arg, bool write_only);
2435 };
2436
2437 /* This control needs a priority check */
2438 #define INFO_FL_PRIO (1 << 0)
2439 /* This control can be valid if the filehandle passes a control handler. */
2440 #define INFO_FL_CTRL (1 << 1)
2441 /* This is a standard ioctl, no need for special code */
2442 #define INFO_FL_STD (1 << 2)
2443 /* This is ioctl has its own function */
2444 #define INFO_FL_FUNC (1 << 3)
2445 /* Queuing ioctl */
2446 #define INFO_FL_QUEUE (1 << 4)
2447 /* Zero struct from after the field to the end */
2448 #define INFO_FL_CLEAR(v4l2_struct, field) \
2449 ((offsetof(struct v4l2_struct, field) + \
2450 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2451 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2452
2453 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
2454 [_IOC_NR(_ioctl)] = { \
2455 .ioctl = _ioctl, \
2456 .flags = _flags | INFO_FL_STD, \
2457 .name = #_ioctl, \
2458 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
2459 .debug = _debug, \
2460 }
2461
2462 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
2463 [_IOC_NR(_ioctl)] = { \
2464 .ioctl = _ioctl, \
2465 .flags = _flags | INFO_FL_FUNC, \
2466 .name = #_ioctl, \
2467 .u.func = _func, \
2468 .debug = _debug, \
2469 }
2470
2471 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2472 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2473 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2474 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2475 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2476 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2477 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2478 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2479 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2480 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2481 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2482 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2483 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2484 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2485 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2486 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2487 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2488 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
2489 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2490 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2491 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2492 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2493 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2494 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2495 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2496 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2497 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2498 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2499 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2500 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2501 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2502 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
2503 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
2504 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2505 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2506 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2507 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2508 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2509 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2510 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2511 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2512 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2513 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2514 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2515 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2516 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2517 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2518 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2519 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2520 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2521 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2522 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2523 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2524 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2525 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2526 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)),
2527 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2528 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2529 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2530 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2531 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2532 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2533 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2534 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2535 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2536 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2537 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2538 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2539 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2540 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2541 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2542 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2543 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2544 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2545 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2546 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2547 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2548 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2549 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2550 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2551 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2552 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)),
2553 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)),
2554 };
2555 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2556
2557 bool v4l2_is_known_ioctl(unsigned int cmd)
2558 {
2559 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2560 return false;
2561 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2562 }
2563
2564 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2565 {
2566 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2567 return vdev->lock;
2568 if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2569 return NULL;
2570 if (vdev->queue && vdev->queue->lock &&
2571 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2572 return vdev->queue->lock;
2573 return vdev->lock;
2574 }
2575
2576 /* Common ioctl debug function. This function can be used by
2577 external ioctl messages as well as internal V4L ioctl */
2578 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2579 {
2580 const char *dir, *type;
2581
2582 if (prefix)
2583 printk(KERN_DEBUG "%s: ", prefix);
2584
2585 switch (_IOC_TYPE(cmd)) {
2586 case 'd':
2587 type = "v4l2_int";
2588 break;
2589 case 'V':
2590 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2591 type = "v4l2";
2592 break;
2593 }
2594 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2595 return;
2596 default:
2597 type = "unknown";
2598 break;
2599 }
2600
2601 switch (_IOC_DIR(cmd)) {
2602 case _IOC_NONE: dir = "--"; break;
2603 case _IOC_READ: dir = "r-"; break;
2604 case _IOC_WRITE: dir = "-w"; break;
2605 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2606 default: dir = "*ERR*"; break;
2607 }
2608 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2609 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2610 }
2611 EXPORT_SYMBOL(v4l_printk_ioctl);
2612
2613 static long __video_do_ioctl(struct file *file,
2614 unsigned int cmd, void *arg)
2615 {
2616 struct video_device *vfd = video_devdata(file);
2617 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2618 bool write_only = false;
2619 struct v4l2_ioctl_info default_info;
2620 const struct v4l2_ioctl_info *info;
2621 void *fh = file->private_data;
2622 struct v4l2_fh *vfh = NULL;
2623 int dev_debug = vfd->dev_debug;
2624 long ret = -ENOTTY;
2625
2626 if (ops == NULL) {
2627 pr_warn("%s: has no ioctl_ops.\n",
2628 video_device_node_name(vfd));
2629 return ret;
2630 }
2631
2632 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2633 vfh = file->private_data;
2634
2635 if (v4l2_is_known_ioctl(cmd)) {
2636 info = &v4l2_ioctls[_IOC_NR(cmd)];
2637
2638 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2639 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2640 goto done;
2641
2642 if (vfh && (info->flags & INFO_FL_PRIO)) {
2643 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2644 if (ret)
2645 goto done;
2646 }
2647 } else {
2648 default_info.ioctl = cmd;
2649 default_info.flags = 0;
2650 default_info.debug = v4l_print_default;
2651 info = &default_info;
2652 }
2653
2654 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2655 if (info->flags & INFO_FL_STD) {
2656 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2657 const void *p = vfd->ioctl_ops;
2658 const vidioc_op *vidioc = p + info->u.offset;
2659
2660 ret = (*vidioc)(file, fh, arg);
2661 } else if (info->flags & INFO_FL_FUNC) {
2662 ret = info->u.func(ops, file, fh, arg);
2663 } else if (!ops->vidioc_default) {
2664 ret = -ENOTTY;
2665 } else {
2666 ret = ops->vidioc_default(file, fh,
2667 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2668 cmd, arg);
2669 }
2670
2671 done:
2672 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2673 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2674 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2675 return ret;
2676
2677 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2678 if (ret < 0)
2679 pr_cont(": error %ld", ret);
2680 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2681 pr_cont("\n");
2682 else if (_IOC_DIR(cmd) == _IOC_NONE)
2683 info->debug(arg, write_only);
2684 else {
2685 pr_cont(": ");
2686 info->debug(arg, write_only);
2687 }
2688 }
2689
2690 return ret;
2691 }
2692
2693 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2694 void __user **user_ptr, void ***kernel_ptr)
2695 {
2696 int ret = 0;
2697
2698 switch (cmd) {
2699 case VIDIOC_PREPARE_BUF:
2700 case VIDIOC_QUERYBUF:
2701 case VIDIOC_QBUF:
2702 case VIDIOC_DQBUF: {
2703 struct v4l2_buffer *buf = parg;
2704
2705 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2706 if (buf->length > VIDEO_MAX_PLANES) {
2707 ret = -EINVAL;
2708 break;
2709 }
2710 *user_ptr = (void __user *)buf->m.planes;
2711 *kernel_ptr = (void **)&buf->m.planes;
2712 *array_size = sizeof(struct v4l2_plane) * buf->length;
2713 ret = 1;
2714 }
2715 break;
2716 }
2717
2718 case VIDIOC_G_EDID:
2719 case VIDIOC_S_EDID: {
2720 struct v4l2_edid *edid = parg;
2721
2722 if (edid->blocks) {
2723 if (edid->blocks > 256) {
2724 ret = -EINVAL;
2725 break;
2726 }
2727 *user_ptr = (void __user *)edid->edid;
2728 *kernel_ptr = (void **)&edid->edid;
2729 *array_size = edid->blocks * 128;
2730 ret = 1;
2731 }
2732 break;
2733 }
2734
2735 case VIDIOC_S_EXT_CTRLS:
2736 case VIDIOC_G_EXT_CTRLS:
2737 case VIDIOC_TRY_EXT_CTRLS: {
2738 struct v4l2_ext_controls *ctrls = parg;
2739
2740 if (ctrls->count != 0) {
2741 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2742 ret = -EINVAL;
2743 break;
2744 }
2745 *user_ptr = (void __user *)ctrls->controls;
2746 *kernel_ptr = (void **)&ctrls->controls;
2747 *array_size = sizeof(struct v4l2_ext_control)
2748 * ctrls->count;
2749 ret = 1;
2750 }
2751 break;
2752 }
2753 }
2754
2755 return ret;
2756 }
2757
2758 long
2759 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2760 v4l2_kioctl func)
2761 {
2762 char sbuf[128];
2763 void *mbuf = NULL;
2764 void *parg = (void *)arg;
2765 long err = -EINVAL;
2766 bool has_array_args;
2767 size_t array_size = 0;
2768 void __user *user_ptr = NULL;
2769 void **kernel_ptr = NULL;
2770
2771 /* Copy arguments into temp kernel buffer */
2772 if (_IOC_DIR(cmd) != _IOC_NONE) {
2773 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2774 parg = sbuf;
2775 } else {
2776 /* too big to allocate from stack */
2777 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2778 if (NULL == mbuf)
2779 return -ENOMEM;
2780 parg = mbuf;
2781 }
2782
2783 err = -EFAULT;
2784 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2785 unsigned int n = _IOC_SIZE(cmd);
2786
2787 /*
2788 * In some cases, only a few fields are used as input,
2789 * i.e. when the app sets "index" and then the driver
2790 * fills in the rest of the structure for the thing
2791 * with that index. We only need to copy up the first
2792 * non-input field.
2793 */
2794 if (v4l2_is_known_ioctl(cmd)) {
2795 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2796 if (flags & INFO_FL_CLEAR_MASK)
2797 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2798 }
2799
2800 if (copy_from_user(parg, (void __user *)arg, n))
2801 goto out;
2802
2803 /* zero out anything we don't copy from userspace */
2804 if (n < _IOC_SIZE(cmd))
2805 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2806 } else {
2807 /* read-only ioctl */
2808 memset(parg, 0, _IOC_SIZE(cmd));
2809 }
2810 }
2811
2812 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2813 if (err < 0)
2814 goto out;
2815 has_array_args = err;
2816
2817 if (has_array_args) {
2818 /*
2819 * When adding new types of array args, make sure that the
2820 * parent argument to ioctl (which contains the pointer to the
2821 * array) fits into sbuf (so that mbuf will still remain
2822 * unused up to here).
2823 */
2824 mbuf = kmalloc(array_size, GFP_KERNEL);
2825 err = -ENOMEM;
2826 if (NULL == mbuf)
2827 goto out_array_args;
2828 err = -EFAULT;
2829 if (copy_from_user(mbuf, user_ptr, array_size))
2830 goto out_array_args;
2831 *kernel_ptr = mbuf;
2832 }
2833
2834 /* Handles IOCTL */
2835 err = func(file, cmd, parg);
2836 if (err == -ENOIOCTLCMD)
2837 err = -ENOTTY;
2838 if (err == 0) {
2839 if (cmd == VIDIOC_DQBUF)
2840 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
2841 else if (cmd == VIDIOC_QBUF)
2842 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
2843 }
2844
2845 if (has_array_args) {
2846 *kernel_ptr = (void __force *)user_ptr;
2847 if (copy_to_user(user_ptr, mbuf, array_size))
2848 err = -EFAULT;
2849 goto out_array_args;
2850 }
2851 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2852 results that must be returned. */
2853 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2854 goto out;
2855
2856 out_array_args:
2857 /* Copy results into user buffer */
2858 switch (_IOC_DIR(cmd)) {
2859 case _IOC_READ:
2860 case (_IOC_WRITE | _IOC_READ):
2861 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2862 err = -EFAULT;
2863 break;
2864 }
2865
2866 out:
2867 kfree(mbuf);
2868 return err;
2869 }
2870 EXPORT_SYMBOL(video_usercopy);
2871
2872 long video_ioctl2(struct file *file,
2873 unsigned int cmd, unsigned long arg)
2874 {
2875 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2876 }
2877 EXPORT_SYMBOL(video_ioctl2);
Linux with added FPC-III support