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WIP FPC-III support
[linux/fpc-iii.git] / drivers / media / v4l2-core / v4l2-ioctl.c
blob3198abdd538ce401cd53db28acd04fba8ac6822a
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Video capture interface for Linux version 2
4 *
5 * A generic framework to process V4L2 ioctl commands.
6 *
7 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
8 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
9 */
10
11 #include <linux/compat.h>
12 #include <linux/mm.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/version.h>
18
19 #include <linux/videodev2.h>
20
21 #include <media/v4l2-common.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/v4l2-ctrls.h>
24 #include <media/v4l2-fh.h>
25 #include <media/v4l2-event.h>
26 #include <media/v4l2-device.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/v4l2-mc.h>
29 #include <media/v4l2-mem2mem.h>
30
31 #include <trace/events/v4l2.h>
32
33 /* Zero out the end of the struct pointed to by p. Everything after, but
34 * not including, the specified field is cleared. */
35 #define CLEAR_AFTER_FIELD(p, field) \
36 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
37 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
38
39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
40
41 struct std_descr {
42 v4l2_std_id std;
43 const char *descr;
44 };
45
46 static const struct std_descr standards[] = {
47 { V4L2_STD_NTSC, "NTSC" },
48 { V4L2_STD_NTSC_M, "NTSC-M" },
49 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
50 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
51 { V4L2_STD_NTSC_443, "NTSC-443" },
52 { V4L2_STD_PAL, "PAL" },
53 { V4L2_STD_PAL_BG, "PAL-BG" },
54 { V4L2_STD_PAL_B, "PAL-B" },
55 { V4L2_STD_PAL_B1, "PAL-B1" },
56 { V4L2_STD_PAL_G, "PAL-G" },
57 { V4L2_STD_PAL_H, "PAL-H" },
58 { V4L2_STD_PAL_I, "PAL-I" },
59 { V4L2_STD_PAL_DK, "PAL-DK" },
60 { V4L2_STD_PAL_D, "PAL-D" },
61 { V4L2_STD_PAL_D1, "PAL-D1" },
62 { V4L2_STD_PAL_K, "PAL-K" },
63 { V4L2_STD_PAL_M, "PAL-M" },
64 { V4L2_STD_PAL_N, "PAL-N" },
65 { V4L2_STD_PAL_Nc, "PAL-Nc" },
66 { V4L2_STD_PAL_60, "PAL-60" },
67 { V4L2_STD_SECAM, "SECAM" },
68 { V4L2_STD_SECAM_B, "SECAM-B" },
69 { V4L2_STD_SECAM_G, "SECAM-G" },
70 { V4L2_STD_SECAM_H, "SECAM-H" },
71 { V4L2_STD_SECAM_DK, "SECAM-DK" },
72 { V4L2_STD_SECAM_D, "SECAM-D" },
73 { V4L2_STD_SECAM_K, "SECAM-K" },
74 { V4L2_STD_SECAM_K1, "SECAM-K1" },
75 { V4L2_STD_SECAM_L, "SECAM-L" },
76 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
77 { 0, "Unknown" }
78 };
79
80 /* video4linux standard ID conversion to standard name
81 */
82 const char *v4l2_norm_to_name(v4l2_std_id id)
83 {
84 u32 myid = id;
85 int i;
86
87 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
88 64 bit comparisons. So, on that architecture, with some gcc
89 variants, compilation fails. Currently, the max value is 30bit wide.
90 */
91 BUG_ON(myid != id);
92
93 for (i = 0; standards[i].std; i++)
94 if (myid == standards[i].std)
95 break;
96 return standards[i].descr;
97 }
98 EXPORT_SYMBOL(v4l2_norm_to_name);
99
100 /* Returns frame period for the given standard */
101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
102 {
103 if (id & V4L2_STD_525_60) {
104 frameperiod->numerator = 1001;
105 frameperiod->denominator = 30000;
106 } else {
107 frameperiod->numerator = 1;
108 frameperiod->denominator = 25;
109 }
110 }
111 EXPORT_SYMBOL(v4l2_video_std_frame_period);
112
113 /* Fill in the fields of a v4l2_standard structure according to the
114 'id' and 'transmission' parameters. Returns negative on error. */
115 int v4l2_video_std_construct(struct v4l2_standard *vs,
116 int id, const char *name)
117 {
118 vs->id = id;
119 v4l2_video_std_frame_period(id, &vs->frameperiod);
120 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
121 strscpy(vs->name, name, sizeof(vs->name));
122 return 0;
123 }
124 EXPORT_SYMBOL(v4l2_video_std_construct);
125
126 /* Fill in the fields of a v4l2_standard structure according to the
127 * 'id' and 'vs->index' parameters. Returns negative on error. */
128 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
129 {
130 v4l2_std_id curr_id = 0;
131 unsigned int index = vs->index, i, j = 0;
132 const char *descr = "";
133
134 /* Return -ENODATA if the id for the current input
135 or output is 0, meaning that it doesn't support this API. */
136 if (id == 0)
137 return -ENODATA;
138
139 /* Return norm array in a canonical way */
140 for (i = 0; i <= index && id; i++) {
141 /* last std value in the standards array is 0, so this
142 while always ends there since (id & 0) == 0. */
143 while ((id & standards[j].std) != standards[j].std)
144 j++;
145 curr_id = standards[j].std;
146 descr = standards[j].descr;
147 j++;
148 if (curr_id == 0)
149 break;
150 if (curr_id != V4L2_STD_PAL &&
151 curr_id != V4L2_STD_SECAM &&
152 curr_id != V4L2_STD_NTSC)
153 id &= ~curr_id;
154 }
155 if (i <= index)
156 return -EINVAL;
157
158 v4l2_video_std_construct(vs, curr_id, descr);
159 return 0;
160 }
161
162 /* ----------------------------------------------------------------- */
163 /* some arrays for pretty-printing debug messages of enum types */
164
165 const char *v4l2_field_names[] = {
166 [V4L2_FIELD_ANY] = "any",
167 [V4L2_FIELD_NONE] = "none",
168 [V4L2_FIELD_TOP] = "top",
169 [V4L2_FIELD_BOTTOM] = "bottom",
170 [V4L2_FIELD_INTERLACED] = "interlaced",
171 [V4L2_FIELD_SEQ_TB] = "seq-tb",
172 [V4L2_FIELD_SEQ_BT] = "seq-bt",
173 [V4L2_FIELD_ALTERNATE] = "alternate",
174 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
175 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
176 };
177 EXPORT_SYMBOL(v4l2_field_names);
178
179 const char *v4l2_type_names[] = {
180 [0] = "0",
181 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
182 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
183 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
184 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
185 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
186 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
187 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
188 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
189 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
190 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
191 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
192 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
193 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
194 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out",
195 };
196 EXPORT_SYMBOL(v4l2_type_names);
197
198 static const char *v4l2_memory_names[] = {
199 [V4L2_MEMORY_MMAP] = "mmap",
200 [V4L2_MEMORY_USERPTR] = "userptr",
201 [V4L2_MEMORY_OVERLAY] = "overlay",
202 [V4L2_MEMORY_DMABUF] = "dmabuf",
203 };
204
205 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
206
207 /* ------------------------------------------------------------------ */
208 /* debug help functions */
209
210 static void v4l_print_querycap(const void *arg, bool write_only)
211 {
212 const struct v4l2_capability *p = arg;
213
214 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
215 (int)sizeof(p->driver), p->driver,
216 (int)sizeof(p->card), p->card,
217 (int)sizeof(p->bus_info), p->bus_info,
218 p->version, p->capabilities, p->device_caps);
219 }
220
221 static void v4l_print_enuminput(const void *arg, bool write_only)
222 {
223 const struct v4l2_input *p = arg;
224
225 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
226 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
227 p->tuner, (unsigned long long)p->std, p->status,
228 p->capabilities);
229 }
230
231 static void v4l_print_enumoutput(const void *arg, bool write_only)
232 {
233 const struct v4l2_output *p = arg;
234
235 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
236 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
237 p->modulator, (unsigned long long)p->std, p->capabilities);
238 }
239
240 static void v4l_print_audio(const void *arg, bool write_only)
241 {
242 const struct v4l2_audio *p = arg;
243
244 if (write_only)
245 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
246 else
247 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
248 p->index, (int)sizeof(p->name), p->name,
249 p->capability, p->mode);
250 }
251
252 static void v4l_print_audioout(const void *arg, bool write_only)
253 {
254 const struct v4l2_audioout *p = arg;
255
256 if (write_only)
257 pr_cont("index=%u\n", p->index);
258 else
259 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
260 p->index, (int)sizeof(p->name), p->name,
261 p->capability, p->mode);
262 }
263
264 static void v4l_print_fmtdesc(const void *arg, bool write_only)
265 {
266 const struct v4l2_fmtdesc *p = arg;
267
268 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n",
269 p->index, prt_names(p->type, v4l2_type_names),
270 p->flags, (p->pixelformat & 0xff),
271 (p->pixelformat >> 8) & 0xff,
272 (p->pixelformat >> 16) & 0xff,
273 (p->pixelformat >> 24) & 0xff,
274 p->mbus_code,
275 (int)sizeof(p->description), p->description);
276 }
277
278 static void v4l_print_format(const void *arg, bool write_only)
279 {
280 const struct v4l2_format *p = arg;
281 const struct v4l2_pix_format *pix;
282 const struct v4l2_pix_format_mplane *mp;
283 const struct v4l2_vbi_format *vbi;
284 const struct v4l2_sliced_vbi_format *sliced;
285 const struct v4l2_window *win;
286 const struct v4l2_sdr_format *sdr;
287 const struct v4l2_meta_format *meta;
288 u32 planes;
289 unsigned i;
290
291 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
292 switch (p->type) {
293 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
294 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
295 pix = &p->fmt.pix;
296 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",
297 pix->width, pix->height,
298 (pix->pixelformat & 0xff),
299 (pix->pixelformat >> 8) & 0xff,
300 (pix->pixelformat >> 16) & 0xff,
301 (pix->pixelformat >> 24) & 0xff,
302 prt_names(pix->field, v4l2_field_names),
303 pix->bytesperline, pix->sizeimage,
304 pix->colorspace, pix->flags, pix->ycbcr_enc,
305 pix->quantization, pix->xfer_func);
306 break;
307 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
308 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
309 mp = &p->fmt.pix_mp;
310 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",
311 mp->width, mp->height,
312 (mp->pixelformat & 0xff),
313 (mp->pixelformat >> 8) & 0xff,
314 (mp->pixelformat >> 16) & 0xff,
315 (mp->pixelformat >> 24) & 0xff,
316 prt_names(mp->field, v4l2_field_names),
317 mp->colorspace, mp->num_planes, mp->flags,
318 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
319 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
320 for (i = 0; i < planes; i++)
321 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
322 mp->plane_fmt[i].bytesperline,
323 mp->plane_fmt[i].sizeimage);
324 break;
325 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
326 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
327 win = &p->fmt.win;
328 /* Note: we can't print the clip list here since the clips
329 * pointer is a userspace pointer, not a kernelspace
330 * pointer. */
331 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",
332 win->w.width, win->w.height, win->w.left, win->w.top,
333 prt_names(win->field, v4l2_field_names),
334 win->chromakey, win->clipcount, win->clips,
335 win->bitmap, win->global_alpha);
336 break;
337 case V4L2_BUF_TYPE_VBI_CAPTURE:
338 case V4L2_BUF_TYPE_VBI_OUTPUT:
339 vbi = &p->fmt.vbi;
340 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
341 vbi->sampling_rate, vbi->offset,
342 vbi->samples_per_line,
343 (vbi->sample_format & 0xff),
344 (vbi->sample_format >> 8) & 0xff,
345 (vbi->sample_format >> 16) & 0xff,
346 (vbi->sample_format >> 24) & 0xff,
347 vbi->start[0], vbi->start[1],
348 vbi->count[0], vbi->count[1]);
349 break;
350 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
351 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
352 sliced = &p->fmt.sliced;
353 pr_cont(", service_set=0x%08x, io_size=%d\n",
354 sliced->service_set, sliced->io_size);
355 for (i = 0; i < 24; i++)
356 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
357 sliced->service_lines[0][i],
358 sliced->service_lines[1][i]);
359 break;
360 case V4L2_BUF_TYPE_SDR_CAPTURE:
361 case V4L2_BUF_TYPE_SDR_OUTPUT:
362 sdr = &p->fmt.sdr;
363 pr_cont(", pixelformat=%c%c%c%c\n",
364 (sdr->pixelformat >> 0) & 0xff,
365 (sdr->pixelformat >> 8) & 0xff,
366 (sdr->pixelformat >> 16) & 0xff,
367 (sdr->pixelformat >> 24) & 0xff);
368 break;
369 case V4L2_BUF_TYPE_META_CAPTURE:
370 case V4L2_BUF_TYPE_META_OUTPUT:
371 meta = &p->fmt.meta;
372 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
373 (meta->dataformat >> 0) & 0xff,
374 (meta->dataformat >> 8) & 0xff,
375 (meta->dataformat >> 16) & 0xff,
376 (meta->dataformat >> 24) & 0xff,
377 meta->buffersize);
378 break;
379 }
380 }
381
382 static void v4l_print_framebuffer(const void *arg, bool write_only)
383 {
384 const struct v4l2_framebuffer *p = arg;
385
386 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",
387 p->capability, p->flags, p->base,
388 p->fmt.width, p->fmt.height,
389 (p->fmt.pixelformat & 0xff),
390 (p->fmt.pixelformat >> 8) & 0xff,
391 (p->fmt.pixelformat >> 16) & 0xff,
392 (p->fmt.pixelformat >> 24) & 0xff,
393 p->fmt.bytesperline, p->fmt.sizeimage,
394 p->fmt.colorspace);
395 }
396
397 static void v4l_print_buftype(const void *arg, bool write_only)
398 {
399 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
400 }
401
402 static void v4l_print_modulator(const void *arg, bool write_only)
403 {
404 const struct v4l2_modulator *p = arg;
405
406 if (write_only)
407 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
408 else
409 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
410 p->index, (int)sizeof(p->name), p->name, p->capability,
411 p->rangelow, p->rangehigh, p->txsubchans);
412 }
413
414 static void v4l_print_tuner(const void *arg, bool write_only)
415 {
416 const struct v4l2_tuner *p = arg;
417
418 if (write_only)
419 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
420 else
421 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",
422 p->index, (int)sizeof(p->name), p->name, p->type,
423 p->capability, p->rangelow,
424 p->rangehigh, p->signal, p->afc,
425 p->rxsubchans, p->audmode);
426 }
427
428 static void v4l_print_frequency(const void *arg, bool write_only)
429 {
430 const struct v4l2_frequency *p = arg;
431
432 pr_cont("tuner=%u, type=%u, frequency=%u\n",
433 p->tuner, p->type, p->frequency);
434 }
435
436 static void v4l_print_standard(const void *arg, bool write_only)
437 {
438 const struct v4l2_standard *p = arg;
439
440 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
441 p->index,
442 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
443 p->frameperiod.numerator,
444 p->frameperiod.denominator,
445 p->framelines);
446 }
447
448 static void v4l_print_std(const void *arg, bool write_only)
449 {
450 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
451 }
452
453 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
454 {
455 const struct v4l2_hw_freq_seek *p = arg;
456
457 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
458 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
459 p->rangelow, p->rangehigh);
460 }
461
462 static void v4l_print_requestbuffers(const void *arg, bool write_only)
463 {
464 const struct v4l2_requestbuffers *p = arg;
465
466 pr_cont("count=%d, type=%s, memory=%s\n",
467 p->count,
468 prt_names(p->type, v4l2_type_names),
469 prt_names(p->memory, v4l2_memory_names));
470 }
471
472 static void v4l_print_buffer(const void *arg, bool write_only)
473 {
474 const struct v4l2_buffer *p = arg;
475 const struct v4l2_timecode *tc = &p->timecode;
476 const struct v4l2_plane *plane;
477 int i;
478
479 pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
480 (int)p->timestamp.tv_sec / 3600,
481 ((int)p->timestamp.tv_sec / 60) % 60,
482 ((int)p->timestamp.tv_sec % 60),
483 (long)p->timestamp.tv_usec,
484 p->index,
485 prt_names(p->type, v4l2_type_names), p->request_fd,
486 p->flags, prt_names(p->field, v4l2_field_names),
487 p->sequence, prt_names(p->memory, v4l2_memory_names));
488
489 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
490 pr_cont("\n");
491 for (i = 0; i < p->length; ++i) {
492 plane = &p->m.planes[i];
493 printk(KERN_DEBUG
494 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
495 i, plane->bytesused, plane->data_offset,
496 plane->m.userptr, plane->length);
497 }
498 } else {
499 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
500 p->bytesused, p->m.userptr, p->length);
501 }
502
503 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
504 tc->hours, tc->minutes, tc->seconds,
505 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
506 }
507
508 static void v4l_print_exportbuffer(const void *arg, bool write_only)
509 {
510 const struct v4l2_exportbuffer *p = arg;
511
512 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
513 p->fd, prt_names(p->type, v4l2_type_names),
514 p->index, p->plane, p->flags);
515 }
516
517 static void v4l_print_create_buffers(const void *arg, bool write_only)
518 {
519 const struct v4l2_create_buffers *p = arg;
520
521 pr_cont("index=%d, count=%d, memory=%s, ",
522 p->index, p->count,
523 prt_names(p->memory, v4l2_memory_names));
524 v4l_print_format(&p->format, write_only);
525 }
526
527 static void v4l_print_streamparm(const void *arg, bool write_only)
528 {
529 const struct v4l2_streamparm *p = arg;
530
531 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
532
533 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
534 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
535 const struct v4l2_captureparm *c = &p->parm.capture;
536
537 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
538 c->capability, c->capturemode,
539 c->timeperframe.numerator, c->timeperframe.denominator,
540 c->extendedmode, c->readbuffers);
541 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
542 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
543 const struct v4l2_outputparm *c = &p->parm.output;
544
545 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
546 c->capability, c->outputmode,
547 c->timeperframe.numerator, c->timeperframe.denominator,
548 c->extendedmode, c->writebuffers);
549 } else {
550 pr_cont("\n");
551 }
552 }
553
554 static void v4l_print_queryctrl(const void *arg, bool write_only)
555 {
556 const struct v4l2_queryctrl *p = arg;
557
558 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
559 p->id, p->type, (int)sizeof(p->name), p->name,
560 p->minimum, p->maximum,
561 p->step, p->default_value, p->flags);
562 }
563
564 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
565 {
566 const struct v4l2_query_ext_ctrl *p = arg;
567
568 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",
569 p->id, p->type, (int)sizeof(p->name), p->name,
570 p->minimum, p->maximum,
571 p->step, p->default_value, p->flags,
572 p->elem_size, p->elems, p->nr_of_dims,
573 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
574 }
575
576 static void v4l_print_querymenu(const void *arg, bool write_only)
577 {
578 const struct v4l2_querymenu *p = arg;
579
580 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
581 }
582
583 static void v4l_print_control(const void *arg, bool write_only)
584 {
585 const struct v4l2_control *p = arg;
586 const char *name = v4l2_ctrl_get_name(p->id);
587
588 if (name)
589 pr_cont("name=%s, ", name);
590 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
591 }
592
593 static void v4l_print_ext_controls(const void *arg, bool write_only)
594 {
595 const struct v4l2_ext_controls *p = arg;
596 int i;
597
598 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
599 p->which, p->count, p->error_idx, p->request_fd);
600 for (i = 0; i < p->count; i++) {
601 unsigned int id = p->controls[i].id;
602 const char *name = v4l2_ctrl_get_name(id);
603
604 if (name)
605 pr_cont(", name=%s", name);
606 if (!p->controls[i].size)
607 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
608 else
609 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
610 }
611 pr_cont("\n");
612 }
613
614 static void v4l_print_cropcap(const void *arg, bool write_only)
615 {
616 const struct v4l2_cropcap *p = arg;
617
618 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
619 prt_names(p->type, v4l2_type_names),
620 p->bounds.width, p->bounds.height,
621 p->bounds.left, p->bounds.top,
622 p->defrect.width, p->defrect.height,
623 p->defrect.left, p->defrect.top,
624 p->pixelaspect.numerator, p->pixelaspect.denominator);
625 }
626
627 static void v4l_print_crop(const void *arg, bool write_only)
628 {
629 const struct v4l2_crop *p = arg;
630
631 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
632 prt_names(p->type, v4l2_type_names),
633 p->c.width, p->c.height,
634 p->c.left, p->c.top);
635 }
636
637 static void v4l_print_selection(const void *arg, bool write_only)
638 {
639 const struct v4l2_selection *p = arg;
640
641 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
642 prt_names(p->type, v4l2_type_names),
643 p->target, p->flags,
644 p->r.width, p->r.height, p->r.left, p->r.top);
645 }
646
647 static void v4l_print_jpegcompression(const void *arg, bool write_only)
648 {
649 const struct v4l2_jpegcompression *p = arg;
650
651 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
652 p->quality, p->APPn, p->APP_len,
653 p->COM_len, p->jpeg_markers);
654 }
655
656 static void v4l_print_enc_idx(const void *arg, bool write_only)
657 {
658 const struct v4l2_enc_idx *p = arg;
659
660 pr_cont("entries=%d, entries_cap=%d\n",
661 p->entries, p->entries_cap);
662 }
663
664 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
665 {
666 const struct v4l2_encoder_cmd *p = arg;
667
668 pr_cont("cmd=%d, flags=0x%x\n",
669 p->cmd, p->flags);
670 }
671
672 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
673 {
674 const struct v4l2_decoder_cmd *p = arg;
675
676 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
677
678 if (p->cmd == V4L2_DEC_CMD_START)
679 pr_info("speed=%d, format=%u\n",
680 p->start.speed, p->start.format);
681 else if (p->cmd == V4L2_DEC_CMD_STOP)
682 pr_info("pts=%llu\n", p->stop.pts);
683 }
684
685 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
686 {
687 const struct v4l2_dbg_chip_info *p = arg;
688
689 pr_cont("type=%u, ", p->match.type);
690 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
691 pr_cont("name=%.*s, ",
692 (int)sizeof(p->match.name), p->match.name);
693 else
694 pr_cont("addr=%u, ", p->match.addr);
695 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
696 }
697
698 static void v4l_print_dbg_register(const void *arg, bool write_only)
699 {
700 const struct v4l2_dbg_register *p = arg;
701
702 pr_cont("type=%u, ", p->match.type);
703 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
704 pr_cont("name=%.*s, ",
705 (int)sizeof(p->match.name), p->match.name);
706 else
707 pr_cont("addr=%u, ", p->match.addr);
708 pr_cont("reg=0x%llx, val=0x%llx\n",
709 p->reg, p->val);
710 }
711
712 static void v4l_print_dv_timings(const void *arg, bool write_only)
713 {
714 const struct v4l2_dv_timings *p = arg;
715
716 switch (p->type) {
717 case V4L2_DV_BT_656_1120:
718 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",
719 p->bt.interlaced, p->bt.pixelclock,
720 p->bt.width, p->bt.height,
721 p->bt.polarities, p->bt.hfrontporch,
722 p->bt.hsync, p->bt.hbackporch,
723 p->bt.vfrontporch, p->bt.vsync,
724 p->bt.vbackporch, p->bt.il_vfrontporch,
725 p->bt.il_vsync, p->bt.il_vbackporch,
726 p->bt.standards, p->bt.flags);
727 break;
728 default:
729 pr_cont("type=%d\n", p->type);
730 break;
731 }
732 }
733
734 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
735 {
736 const struct v4l2_enum_dv_timings *p = arg;
737
738 pr_cont("index=%u, ", p->index);
739 v4l_print_dv_timings(&p->timings, write_only);
740 }
741
742 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
743 {
744 const struct v4l2_dv_timings_cap *p = arg;
745
746 switch (p->type) {
747 case V4L2_DV_BT_656_1120:
748 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
749 p->bt.min_width, p->bt.max_width,
750 p->bt.min_height, p->bt.max_height,
751 p->bt.min_pixelclock, p->bt.max_pixelclock,
752 p->bt.standards, p->bt.capabilities);
753 break;
754 default:
755 pr_cont("type=%u\n", p->type);
756 break;
757 }
758 }
759
760 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
761 {
762 const struct v4l2_frmsizeenum *p = arg;
763
764 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
765 p->index,
766 (p->pixel_format & 0xff),
767 (p->pixel_format >> 8) & 0xff,
768 (p->pixel_format >> 16) & 0xff,
769 (p->pixel_format >> 24) & 0xff,
770 p->type);
771 switch (p->type) {
772 case V4L2_FRMSIZE_TYPE_DISCRETE:
773 pr_cont(", wxh=%ux%u\n",
774 p->discrete.width, p->discrete.height);
775 break;
776 case V4L2_FRMSIZE_TYPE_STEPWISE:
777 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
778 p->stepwise.min_width,
779 p->stepwise.min_height,
780 p->stepwise.max_width,
781 p->stepwise.max_height,
782 p->stepwise.step_width,
783 p->stepwise.step_height);
784 break;
785 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
786 default:
787 pr_cont("\n");
788 break;
789 }
790 }
791
792 static void v4l_print_frmivalenum(const void *arg, bool write_only)
793 {
794 const struct v4l2_frmivalenum *p = arg;
795
796 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
797 p->index,
798 (p->pixel_format & 0xff),
799 (p->pixel_format >> 8) & 0xff,
800 (p->pixel_format >> 16) & 0xff,
801 (p->pixel_format >> 24) & 0xff,
802 p->width, p->height, p->type);
803 switch (p->type) {
804 case V4L2_FRMIVAL_TYPE_DISCRETE:
805 pr_cont(", fps=%d/%d\n",
806 p->discrete.numerator,
807 p->discrete.denominator);
808 break;
809 case V4L2_FRMIVAL_TYPE_STEPWISE:
810 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
811 p->stepwise.min.numerator,
812 p->stepwise.min.denominator,
813 p->stepwise.max.numerator,
814 p->stepwise.max.denominator,
815 p->stepwise.step.numerator,
816 p->stepwise.step.denominator);
817 break;
818 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
819 default:
820 pr_cont("\n");
821 break;
822 }
823 }
824
825 static void v4l_print_event(const void *arg, bool write_only)
826 {
827 const struct v4l2_event *p = arg;
828 const struct v4l2_event_ctrl *c;
829
830 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
831 p->type, p->pending, p->sequence, p->id,
832 p->timestamp.tv_sec, p->timestamp.tv_nsec);
833 switch (p->type) {
834 case V4L2_EVENT_VSYNC:
835 printk(KERN_DEBUG "field=%s\n",
836 prt_names(p->u.vsync.field, v4l2_field_names));
837 break;
838 case V4L2_EVENT_CTRL:
839 c = &p->u.ctrl;
840 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
841 c->changes, c->type);
842 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
843 pr_cont("value64=%lld, ", c->value64);
844 else
845 pr_cont("value=%d, ", c->value);
846 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
847 c->flags, c->minimum, c->maximum,
848 c->step, c->default_value);
849 break;
850 case V4L2_EVENT_FRAME_SYNC:
851 pr_cont("frame_sequence=%u\n",
852 p->u.frame_sync.frame_sequence);
853 break;
854 }
855 }
856
857 static void v4l_print_event_subscription(const void *arg, bool write_only)
858 {
859 const struct v4l2_event_subscription *p = arg;
860
861 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
862 p->type, p->id, p->flags);
863 }
864
865 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
866 {
867 const struct v4l2_sliced_vbi_cap *p = arg;
868 int i;
869
870 pr_cont("type=%s, service_set=0x%08x\n",
871 prt_names(p->type, v4l2_type_names), p->service_set);
872 for (i = 0; i < 24; i++)
873 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
874 p->service_lines[0][i],
875 p->service_lines[1][i]);
876 }
877
878 static void v4l_print_freq_band(const void *arg, bool write_only)
879 {
880 const struct v4l2_frequency_band *p = arg;
881
882 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
883 p->tuner, p->type, p->index,
884 p->capability, p->rangelow,
885 p->rangehigh, p->modulation);
886 }
887
888 static void v4l_print_edid(const void *arg, bool write_only)
889 {
890 const struct v4l2_edid *p = arg;
891
892 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
893 p->pad, p->start_block, p->blocks);
894 }
895
896 static void v4l_print_u32(const void *arg, bool write_only)
897 {
898 pr_cont("value=%u\n", *(const u32 *)arg);
899 }
900
901 static void v4l_print_newline(const void *arg, bool write_only)
902 {
903 pr_cont("\n");
904 }
905
906 static void v4l_print_default(const void *arg, bool write_only)
907 {
908 pr_cont("driver-specific ioctl\n");
909 }
910
911 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
912 {
913 __u32 i;
914
915 /* zero the reserved fields */
916 c->reserved[0] = 0;
917 for (i = 0; i < c->count; i++)
918 c->controls[i].reserved2[0] = 0;
919
920 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
921 when using extended controls.
922 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
923 is it allowed for backwards compatibility.
924 */
925 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
926 return 0;
927 if (!c->which)
928 return 1;
929 /* Check that all controls are from the same control class. */
930 for (i = 0; i < c->count; i++) {
931 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
932 c->error_idx = i;
933 return 0;
934 }
935 }
936 return 1;
937 }
938
939 static int check_fmt(struct file *file, enum v4l2_buf_type type)
940 {
941 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
942 V4L2_CAP_VIDEO_CAPTURE_MPLANE |
943 V4L2_CAP_VIDEO_OUTPUT |
944 V4L2_CAP_VIDEO_OUTPUT_MPLANE |
945 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
946 const u32 meta_caps = V4L2_CAP_META_CAPTURE |
947 V4L2_CAP_META_OUTPUT;
948 struct video_device *vfd = video_devdata(file);
949 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
950 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
951 (vfd->device_caps & vid_caps);
952 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
953 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
954 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
955 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
956 (vfd->device_caps & meta_caps);
957 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
958 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
959
960 if (ops == NULL)
961 return -EINVAL;
962
963 switch (type) {
964 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
965 if ((is_vid || is_tch) && is_rx &&
966 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
967 return 0;
968 break;
969 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
970 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
971 return 0;
972 break;
973 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
974 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
975 return 0;
976 break;
977 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
978 if (is_vid && is_tx &&
979 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
980 return 0;
981 break;
982 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
983 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
984 return 0;
985 break;
986 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
987 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
988 return 0;
989 break;
990 case V4L2_BUF_TYPE_VBI_CAPTURE:
991 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
992 return 0;
993 break;
994 case V4L2_BUF_TYPE_VBI_OUTPUT:
995 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
996 return 0;
997 break;
998 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
999 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
1000 return 0;
1001 break;
1002 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1003 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
1004 return 0;
1005 break;
1006 case V4L2_BUF_TYPE_SDR_CAPTURE:
1007 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
1008 return 0;
1009 break;
1010 case V4L2_BUF_TYPE_SDR_OUTPUT:
1011 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
1012 return 0;
1013 break;
1014 case V4L2_BUF_TYPE_META_CAPTURE:
1015 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
1016 return 0;
1017 break;
1018 case V4L2_BUF_TYPE_META_OUTPUT:
1019 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
1020 return 0;
1021 break;
1022 default:
1023 break;
1024 }
1025 return -EINVAL;
1026 }
1027
1028 static void v4l_sanitize_format(struct v4l2_format *fmt)
1029 {
1030 unsigned int offset;
1031
1032 /* Make sure num_planes is not bogus */
1033 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
1034 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
1035 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
1036 VIDEO_MAX_PLANES);
1037
1038 /*
1039 * The v4l2_pix_format structure has been extended with fields that were
1040 * not previously required to be set to zero by applications. The priv
1041 * field, when set to a magic value, indicates the the extended fields
1042 * are valid. Otherwise they will contain undefined values. To simplify
1043 * the API towards drivers zero the extended fields and set the priv
1044 * field to the magic value when the extended pixel format structure
1045 * isn't used by applications.
1046 */
1047
1048 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1049 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1050 return;
1051
1052 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1053 return;
1054
1055 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1056
1057 offset = offsetof(struct v4l2_pix_format, priv)
1058 + sizeof(fmt->fmt.pix.priv);
1059 memset(((void *)&fmt->fmt.pix) + offset, 0,
1060 sizeof(fmt->fmt.pix) - offset);
1061 }
1062
1063 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1064 struct file *file, void *fh, void *arg)
1065 {
1066 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1067 struct video_device *vfd = video_devdata(file);
1068 int ret;
1069
1070 cap->version = LINUX_VERSION_CODE;
1071 cap->device_caps = vfd->device_caps;
1072 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1073
1074 ret = ops->vidioc_querycap(file, fh, cap);
1075
1076 /*
1077 * Drivers must not change device_caps, so check for this and
1078 * warn if this happened.
1079 */
1080 WARN_ON(cap->device_caps != vfd->device_caps);
1081 /*
1082 * Check that capabilities is a superset of
1083 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1084 */
1085 WARN_ON((cap->capabilities &
1086 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1087 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1088 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1089 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1090
1091 return ret;
1092 }
1093
1094 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1095 struct file *file, void *fh, void *arg)
1096 {
1097 struct video_device *vfd = video_devdata(file);
1098
1099 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1100 *(int *)arg = 0;
1101 return 0;
1102 }
1103
1104 return ops->vidioc_g_input(file, fh, arg);
1105 }
1106
1107 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1108 struct file *file, void *fh, void *arg)
1109 {
1110 struct video_device *vfd = video_devdata(file);
1111
1112 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1113 *(int *)arg = 0;
1114 return 0;
1115 }
1116
1117 return ops->vidioc_g_output(file, fh, arg);
1118 }
1119
1120 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1121 struct file *file, void *fh, void *arg)
1122 {
1123 struct video_device *vfd = video_devdata(file);
1124 int ret;
1125
1126 ret = v4l_enable_media_source(vfd);
1127 if (ret)
1128 return ret;
1129
1130 if (vfd->device_caps & V4L2_CAP_IO_MC)
1131 return *(int *)arg ? -EINVAL : 0;
1132
1133 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1134 }
1135
1136 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1137 struct file *file, void *fh, void *arg)
1138 {
1139 struct video_device *vfd = video_devdata(file);
1140
1141 if (vfd->device_caps & V4L2_CAP_IO_MC)
1142 return *(int *)arg ? -EINVAL : 0;
1143
1144 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1145 }
1146
1147 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1148 struct file *file, void *fh, void *arg)
1149 {
1150 struct video_device *vfd;
1151 u32 *p = arg;
1152
1153 vfd = video_devdata(file);
1154 *p = v4l2_prio_max(vfd->prio);
1155 return 0;
1156 }
1157
1158 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1159 struct file *file, void *fh, void *arg)
1160 {
1161 struct video_device *vfd;
1162 struct v4l2_fh *vfh;
1163 u32 *p = arg;
1164
1165 vfd = video_devdata(file);
1166 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1167 return -ENOTTY;
1168 vfh = file->private_data;
1169 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1170 }
1171
1172 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1173 struct file *file, void *fh, void *arg)
1174 {
1175 struct video_device *vfd = video_devdata(file);
1176 struct v4l2_input *p = arg;
1177
1178 /*
1179 * We set the flags for CAP_DV_TIMINGS &
1180 * CAP_STD here based on ioctl handler provided by the
1181 * driver. If the driver doesn't support these
1182 * for a specific input, it must override these flags.
1183 */
1184 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1185 p->capabilities |= V4L2_IN_CAP_STD;
1186
1187 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1188 if (p->index)
1189 return -EINVAL;
1190 strscpy(p->name, vfd->name, sizeof(p->name));
1191 p->type = V4L2_INPUT_TYPE_CAMERA;
1192 return 0;
1193 }
1194
1195 return ops->vidioc_enum_input(file, fh, p);
1196 }
1197
1198 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1199 struct file *file, void *fh, void *arg)
1200 {
1201 struct video_device *vfd = video_devdata(file);
1202 struct v4l2_output *p = arg;
1203
1204 /*
1205 * We set the flags for CAP_DV_TIMINGS &
1206 * CAP_STD here based on ioctl handler provided by the
1207 * driver. If the driver doesn't support these
1208 * for a specific output, it must override these flags.
1209 */
1210 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1211 p->capabilities |= V4L2_OUT_CAP_STD;
1212
1213 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1214 if (p->index)
1215 return -EINVAL;
1216 strscpy(p->name, vfd->name, sizeof(p->name));
1217 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1218 return 0;
1219 }
1220
1221 return ops->vidioc_enum_output(file, fh, p);
1222 }
1223
1224 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1225 {
1226 const unsigned sz = sizeof(fmt->description);
1227 const char *descr = NULL;
1228 u32 flags = 0;
1229
1230 /*
1231 * We depart from the normal coding style here since the descriptions
1232 * should be aligned so it is easy to see which descriptions will be
1233 * longer than 31 characters (the max length for a description).
1234 * And frankly, this is easier to read anyway.
1235 *
1236 * Note that gcc will use O(log N) comparisons to find the right case.
1237 */
1238 switch (fmt->pixelformat) {
1239 /* Max description length mask: descr = "0123456789012345678901234567890" */
1240 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1241 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1242 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1243 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1244 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break;
1245 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break;
1246 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break;
1247 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break;
1248 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break;
1249 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break;
1250 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1251 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1252 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1253 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break;
1254 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break;
1255 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break;
1256 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break;
1257 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break;
1258 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break;
1259 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1260 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1261 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1262 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1263 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1264 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1265 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1266 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1267 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1268 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1269 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1270 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1271 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1272 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1273 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break;
1274 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break;
1275 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break;
1276 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break;
1277 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1278 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1279 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1280 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1281 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1282 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break;
1283 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1284 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1285 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1286 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
1287 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1288 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1289 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1290 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
1291 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
1292 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1293 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1294 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1295 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1296 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1297 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1298 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1299 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1300 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1301 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1302 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1303 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1304 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1305 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1306 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1307 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1308 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break;
1309 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break;
1310 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break;
1311 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break;
1312 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1313 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1314 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1315 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1316 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1317 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1318 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1319 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1320 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1321 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1322 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1323 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1324 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1325 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1326 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1327 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1328 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1329 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1330 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1331 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1332 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1333 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1334 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1335 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1336 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1337 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1338 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1339 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1340 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1341 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1342 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1343 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1344 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1345 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1346 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1347 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1348 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1349 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1350 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1351 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1352 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1353 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1354 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1355 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1356 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1357 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1358 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1359 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1360 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1361 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1362 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1363 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1364 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1365 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1366 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1367 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break;
1368 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break;
1369 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break;
1370 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break;
1371 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1372 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1373 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1374 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1375 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1376 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1377 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1378 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1379 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1380 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1381 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1382 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1383 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1384 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1385 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1386 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1387 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1388 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1389 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1390 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1391 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1392 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1393 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1394 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
1395 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
1396 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
1397 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break;
1398 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break;
1399 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break;
1400 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break;
1401 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
1402 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
1403 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
1404 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
1405 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break;
1406 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break;
1407 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break;
1408
1409 default:
1410 /* Compressed formats */
1411 flags = V4L2_FMT_FLAG_COMPRESSED;
1412 switch (fmt->pixelformat) {
1413 /* Max description length mask: descr = "0123456789012345678901234567890" */
1414 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1415 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1416 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1417 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1418 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1419 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1420 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1421 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break;
1422 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1423 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1424 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1425 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break;
1426 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break;
1427 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1428 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1429 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1430 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1431 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
1432 case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1433 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
1434 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break;
1435 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
1436 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */
1437 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1438 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1439 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1440 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1441 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1442 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1443 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1444 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1445 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1446 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1447 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1448 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1449 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1450 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1451 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1452 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1453 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1454 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1455 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1456 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1457 default:
1458 if (fmt->description[0])
1459 return;
1460 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1461 flags = 0;
1462 snprintf(fmt->description, sz, "%c%c%c%c%s",
1463 (char)(fmt->pixelformat & 0x7f),
1464 (char)((fmt->pixelformat >> 8) & 0x7f),
1465 (char)((fmt->pixelformat >> 16) & 0x7f),
1466 (char)((fmt->pixelformat >> 24) & 0x7f),
1467 (fmt->pixelformat & (1UL << 31)) ? "-BE" : "");
1468 break;
1469 }
1470 }
1471
1472 if (descr)
1473 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1474 fmt->flags |= flags;
1475 }
1476
1477 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1478 struct file *file, void *fh, void *arg)
1479 {
1480 struct video_device *vdev = video_devdata(file);
1481 struct v4l2_fmtdesc *p = arg;
1482 int ret = check_fmt(file, p->type);
1483 u32 mbus_code;
1484 u32 cap_mask;
1485
1486 if (ret)
1487 return ret;
1488 ret = -EINVAL;
1489
1490 if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1491 p->mbus_code = 0;
1492
1493 mbus_code = p->mbus_code;
1494 CLEAR_AFTER_FIELD(p, type);
1495 p->mbus_code = mbus_code;
1496
1497 switch (p->type) {
1498 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1499 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1500 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1501 V4L2_CAP_VIDEO_M2M_MPLANE;
1502 if (!!(vdev->device_caps & cap_mask) !=
1503 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1504 break;
1505
1506 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1507 break;
1508 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1509 break;
1510 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1511 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1512 break;
1513 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1514 break;
1515 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1516 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1517 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1518 V4L2_CAP_VIDEO_M2M_MPLANE;
1519 if (!!(vdev->device_caps & cap_mask) !=
1520 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1521 break;
1522
1523 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1524 break;
1525 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1526 break;
1527 case V4L2_BUF_TYPE_SDR_CAPTURE:
1528 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1529 break;
1530 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1531 break;
1532 case V4L2_BUF_TYPE_SDR_OUTPUT:
1533 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1534 break;
1535 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1536 break;
1537 case V4L2_BUF_TYPE_META_CAPTURE:
1538 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1539 break;
1540 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1541 break;
1542 case V4L2_BUF_TYPE_META_OUTPUT:
1543 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1544 break;
1545 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1546 break;
1547 }
1548 if (ret == 0)
1549 v4l_fill_fmtdesc(p);
1550 return ret;
1551 }
1552
1553 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1554 {
1555 /*
1556 * The v4l2_pix_format structure contains fields that make no sense for
1557 * touch. Set them to default values in this case.
1558 */
1559
1560 p->field = V4L2_FIELD_NONE;
1561 p->colorspace = V4L2_COLORSPACE_RAW;
1562 p->flags = 0;
1563 p->ycbcr_enc = 0;
1564 p->quantization = 0;
1565 p->xfer_func = 0;
1566 }
1567
1568 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1569 struct file *file, void *fh, void *arg)
1570 {
1571 struct v4l2_format *p = arg;
1572 struct video_device *vfd = video_devdata(file);
1573 int ret = check_fmt(file, p->type);
1574
1575 if (ret)
1576 return ret;
1577
1578 /*
1579 * fmt can't be cleared for these overlay types due to the 'clips'
1580 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1581 * Those are provided by the user. So handle these two overlay types
1582 * first, and then just do a simple memset for the other types.
1583 */
1584 switch (p->type) {
1585 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1586 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1587 struct v4l2_clip *clips = p->fmt.win.clips;
1588 u32 clipcount = p->fmt.win.clipcount;
1589 void __user *bitmap = p->fmt.win.bitmap;
1590
1591 memset(&p->fmt, 0, sizeof(p->fmt));
1592 p->fmt.win.clips = clips;
1593 p->fmt.win.clipcount = clipcount;
1594 p->fmt.win.bitmap = bitmap;
1595 break;
1596 }
1597 default:
1598 memset(&p->fmt, 0, sizeof(p->fmt));
1599 break;
1600 }
1601
1602 switch (p->type) {
1603 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1604 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1605 break;
1606 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1607 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1608 /* just in case the driver zeroed it again */
1609 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1610 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1611 v4l_pix_format_touch(&p->fmt.pix);
1612 return ret;
1613 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1614 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1615 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1616 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1617 case V4L2_BUF_TYPE_VBI_CAPTURE:
1618 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1619 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1620 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1621 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1622 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1623 break;
1624 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1625 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1626 /* just in case the driver zeroed it again */
1627 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1628 return ret;
1629 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1630 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1631 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1632 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1633 case V4L2_BUF_TYPE_VBI_OUTPUT:
1634 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1635 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1636 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1637 case V4L2_BUF_TYPE_SDR_CAPTURE:
1638 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1639 case V4L2_BUF_TYPE_SDR_OUTPUT:
1640 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1641 case V4L2_BUF_TYPE_META_CAPTURE:
1642 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1643 case V4L2_BUF_TYPE_META_OUTPUT:
1644 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1645 }
1646 return -EINVAL;
1647 }
1648
1649 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1650 struct file *file, void *fh, void *arg)
1651 {
1652 struct v4l2_format *p = arg;
1653 struct video_device *vfd = video_devdata(file);
1654 int ret = check_fmt(file, p->type);
1655 unsigned int i;
1656
1657 if (ret)
1658 return ret;
1659
1660 ret = v4l_enable_media_source(vfd);
1661 if (ret)
1662 return ret;
1663 v4l_sanitize_format(p);
1664
1665 switch (p->type) {
1666 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1667 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1668 break;
1669 CLEAR_AFTER_FIELD(p, fmt.pix);
1670 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1671 /* just in case the driver zeroed it again */
1672 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1673 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1674 v4l_pix_format_touch(&p->fmt.pix);
1675 return ret;
1676 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1677 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1678 break;
1679 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1680 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1681 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1682 bytesperline);
1683 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1684 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1685 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1686 break;
1687 CLEAR_AFTER_FIELD(p, fmt.win);
1688 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1689 case V4L2_BUF_TYPE_VBI_CAPTURE:
1690 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1691 break;
1692 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1693 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1694 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1695 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1696 break;
1697 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1698 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1699 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1700 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1701 break;
1702 CLEAR_AFTER_FIELD(p, fmt.pix);
1703 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1704 /* just in case the driver zeroed it again */
1705 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1706 return ret;
1707 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1708 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1709 break;
1710 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1711 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1712 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1713 bytesperline);
1714 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1715 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1716 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1717 break;
1718 CLEAR_AFTER_FIELD(p, fmt.win);
1719 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1720 case V4L2_BUF_TYPE_VBI_OUTPUT:
1721 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1722 break;
1723 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1724 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1725 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1726 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1727 break;
1728 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1729 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1730 case V4L2_BUF_TYPE_SDR_CAPTURE:
1731 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1732 break;
1733 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1734 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1735 case V4L2_BUF_TYPE_SDR_OUTPUT:
1736 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1737 break;
1738 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1739 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1740 case V4L2_BUF_TYPE_META_CAPTURE:
1741 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1742 break;
1743 CLEAR_AFTER_FIELD(p, fmt.meta);
1744 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1745 case V4L2_BUF_TYPE_META_OUTPUT:
1746 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1747 break;
1748 CLEAR_AFTER_FIELD(p, fmt.meta);
1749 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1750 }
1751 return -EINVAL;
1752 }
1753
1754 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1755 struct file *file, void *fh, void *arg)
1756 {
1757 struct v4l2_format *p = arg;
1758 struct video_device *vfd = video_devdata(file);
1759 int ret = check_fmt(file, p->type);
1760 unsigned int i;
1761
1762 if (ret)
1763 return ret;
1764
1765 v4l_sanitize_format(p);
1766
1767 switch (p->type) {
1768 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1769 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1770 break;
1771 CLEAR_AFTER_FIELD(p, fmt.pix);
1772 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1773 /* just in case the driver zeroed it again */
1774 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1775 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1776 v4l_pix_format_touch(&p->fmt.pix);
1777 return ret;
1778 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1779 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1780 break;
1781 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1782 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1783 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1784 bytesperline);
1785 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1786 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1787 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1788 break;
1789 CLEAR_AFTER_FIELD(p, fmt.win);
1790 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1791 case V4L2_BUF_TYPE_VBI_CAPTURE:
1792 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1793 break;
1794 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1795 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1796 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1797 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1798 break;
1799 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1800 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1801 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1802 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1803 break;
1804 CLEAR_AFTER_FIELD(p, fmt.pix);
1805 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1806 /* just in case the driver zeroed it again */
1807 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1808 return ret;
1809 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1810 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1811 break;
1812 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1813 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1814 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1815 bytesperline);
1816 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1817 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1818 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1819 break;
1820 CLEAR_AFTER_FIELD(p, fmt.win);
1821 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1822 case V4L2_BUF_TYPE_VBI_OUTPUT:
1823 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1824 break;
1825 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1826 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1827 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1828 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1829 break;
1830 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1831 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1832 case V4L2_BUF_TYPE_SDR_CAPTURE:
1833 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1834 break;
1835 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1836 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1837 case V4L2_BUF_TYPE_SDR_OUTPUT:
1838 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1839 break;
1840 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1841 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1842 case V4L2_BUF_TYPE_META_CAPTURE:
1843 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1844 break;
1845 CLEAR_AFTER_FIELD(p, fmt.meta);
1846 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1847 case V4L2_BUF_TYPE_META_OUTPUT:
1848 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1849 break;
1850 CLEAR_AFTER_FIELD(p, fmt.meta);
1851 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1852 }
1853 return -EINVAL;
1854 }
1855
1856 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1857 struct file *file, void *fh, void *arg)
1858 {
1859 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1860 }
1861
1862 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1863 struct file *file, void *fh, void *arg)
1864 {
1865 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1866 }
1867
1868 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1869 struct file *file, void *fh, void *arg)
1870 {
1871 struct video_device *vfd = video_devdata(file);
1872 struct v4l2_tuner *p = arg;
1873 int err;
1874
1875 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1876 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1877 err = ops->vidioc_g_tuner(file, fh, p);
1878 if (!err)
1879 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1880 return err;
1881 }
1882
1883 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1884 struct file *file, void *fh, void *arg)
1885 {
1886 struct video_device *vfd = video_devdata(file);
1887 struct v4l2_tuner *p = arg;
1888 int ret;
1889
1890 ret = v4l_enable_media_source(vfd);
1891 if (ret)
1892 return ret;
1893 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1894 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1895 return ops->vidioc_s_tuner(file, fh, p);
1896 }
1897
1898 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1899 struct file *file, void *fh, void *arg)
1900 {
1901 struct video_device *vfd = video_devdata(file);
1902 struct v4l2_modulator *p = arg;
1903 int err;
1904
1905 if (vfd->vfl_type == VFL_TYPE_RADIO)
1906 p->type = V4L2_TUNER_RADIO;
1907
1908 err = ops->vidioc_g_modulator(file, fh, p);
1909 if (!err)
1910 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1911 return err;
1912 }
1913
1914 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1915 struct file *file, void *fh, void *arg)
1916 {
1917 struct video_device *vfd = video_devdata(file);
1918 struct v4l2_modulator *p = arg;
1919
1920 if (vfd->vfl_type == VFL_TYPE_RADIO)
1921 p->type = V4L2_TUNER_RADIO;
1922
1923 return ops->vidioc_s_modulator(file, fh, p);
1924 }
1925
1926 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1927 struct file *file, void *fh, void *arg)
1928 {
1929 struct video_device *vfd = video_devdata(file);
1930 struct v4l2_frequency *p = arg;
1931
1932 if (vfd->vfl_type == VFL_TYPE_SDR)
1933 p->type = V4L2_TUNER_SDR;
1934 else
1935 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1936 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1937 return ops->vidioc_g_frequency(file, fh, p);
1938 }
1939
1940 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1941 struct file *file, void *fh, void *arg)
1942 {
1943 struct video_device *vfd = video_devdata(file);
1944 const struct v4l2_frequency *p = arg;
1945 enum v4l2_tuner_type type;
1946 int ret;
1947
1948 ret = v4l_enable_media_source(vfd);
1949 if (ret)
1950 return ret;
1951 if (vfd->vfl_type == VFL_TYPE_SDR) {
1952 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1953 return -EINVAL;
1954 } else {
1955 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1956 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1957 if (type != p->type)
1958 return -EINVAL;
1959 }
1960 return ops->vidioc_s_frequency(file, fh, p);
1961 }
1962
1963 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1964 struct file *file, void *fh, void *arg)
1965 {
1966 struct video_device *vfd = video_devdata(file);
1967 struct v4l2_standard *p = arg;
1968
1969 return v4l_video_std_enumstd(p, vfd->tvnorms);
1970 }
1971
1972 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1973 struct file *file, void *fh, void *arg)
1974 {
1975 struct video_device *vfd = video_devdata(file);
1976 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1977 int ret;
1978
1979 ret = v4l_enable_media_source(vfd);
1980 if (ret)
1981 return ret;
1982 norm = id & vfd->tvnorms;
1983 if (vfd->tvnorms && !norm) /* Check if std is supported */
1984 return -EINVAL;
1985
1986 /* Calls the specific handler */
1987 return ops->vidioc_s_std(file, fh, norm);
1988 }
1989
1990 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1991 struct file *file, void *fh, void *arg)
1992 {
1993 struct video_device *vfd = video_devdata(file);
1994 v4l2_std_id *p = arg;
1995 int ret;
1996
1997 ret = v4l_enable_media_source(vfd);
1998 if (ret)
1999 return ret;
2000 /*
2001 * If no signal is detected, then the driver should return
2002 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
2003 * any standards that do not apply removed.
2004 *
2005 * This means that tuners, audio and video decoders can join
2006 * their efforts to improve the standards detection.
2007 */
2008 *p = vfd->tvnorms;
2009 return ops->vidioc_querystd(file, fh, arg);
2010 }
2011
2012 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
2013 struct file *file, void *fh, void *arg)
2014 {
2015 struct video_device *vfd = video_devdata(file);
2016 struct v4l2_hw_freq_seek *p = arg;
2017 enum v4l2_tuner_type type;
2018 int ret;
2019
2020 ret = v4l_enable_media_source(vfd);
2021 if (ret)
2022 return ret;
2023 /* s_hw_freq_seek is not supported for SDR for now */
2024 if (vfd->vfl_type == VFL_TYPE_SDR)
2025 return -EINVAL;
2026
2027 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2028 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2029 if (p->type != type)
2030 return -EINVAL;
2031 return ops->vidioc_s_hw_freq_seek(file, fh, p);
2032 }
2033
2034 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
2035 struct file *file, void *fh, void *arg)
2036 {
2037 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
2038 }
2039
2040 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
2041 struct file *file, void *fh, void *arg)
2042 {
2043 struct v4l2_requestbuffers *p = arg;
2044 int ret = check_fmt(file, p->type);
2045
2046 if (ret)
2047 return ret;
2048
2049 CLEAR_AFTER_FIELD(p, capabilities);
2050
2051 return ops->vidioc_reqbufs(file, fh, p);
2052 }
2053
2054 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2055 struct file *file, void *fh, void *arg)
2056 {
2057 struct v4l2_buffer *p = arg;
2058 int ret = check_fmt(file, p->type);
2059
2060 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2061 }
2062
2063 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2064 struct file *file, void *fh, void *arg)
2065 {
2066 struct v4l2_buffer *p = arg;
2067 int ret = check_fmt(file, p->type);
2068
2069 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2070 }
2071
2072 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2073 struct file *file, void *fh, void *arg)
2074 {
2075 struct v4l2_buffer *p = arg;
2076 int ret = check_fmt(file, p->type);
2077
2078 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2079 }
2080
2081 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2082 struct file *file, void *fh, void *arg)
2083 {
2084 struct v4l2_create_buffers *create = arg;
2085 int ret = check_fmt(file, create->format.type);
2086
2087 if (ret)
2088 return ret;
2089
2090 CLEAR_AFTER_FIELD(create, capabilities);
2091
2092 v4l_sanitize_format(&create->format);
2093
2094 ret = ops->vidioc_create_bufs(file, fh, create);
2095
2096 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2097 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2098 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2099
2100 return ret;
2101 }
2102
2103 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2104 struct file *file, void *fh, void *arg)
2105 {
2106 struct v4l2_buffer *b = arg;
2107 int ret = check_fmt(file, b->type);
2108
2109 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2110 }
2111
2112 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2113 struct file *file, void *fh, void *arg)
2114 {
2115 struct v4l2_streamparm *p = arg;
2116 v4l2_std_id std;
2117 int ret = check_fmt(file, p->type);
2118
2119 if (ret)
2120 return ret;
2121 if (ops->vidioc_g_parm)
2122 return ops->vidioc_g_parm(file, fh, p);
2123 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2124 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2125 return -EINVAL;
2126 p->parm.capture.readbuffers = 2;
2127 ret = ops->vidioc_g_std(file, fh, &std);
2128 if (ret == 0)
2129 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2130 return ret;
2131 }
2132
2133 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2134 struct file *file, void *fh, void *arg)
2135 {
2136 struct v4l2_streamparm *p = arg;
2137 int ret = check_fmt(file, p->type);
2138
2139 if (ret)
2140 return ret;
2141
2142 /* Note: extendedmode is never used in drivers */
2143 if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2144 memset(p->parm.output.reserved, 0,
2145 sizeof(p->parm.output.reserved));
2146 p->parm.output.extendedmode = 0;
2147 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2148 } else {
2149 memset(p->parm.capture.reserved, 0,
2150 sizeof(p->parm.capture.reserved));
2151 p->parm.capture.extendedmode = 0;
2152 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2153 }
2154 return ops->vidioc_s_parm(file, fh, p);
2155 }
2156
2157 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2158 struct file *file, void *fh, void *arg)
2159 {
2160 struct video_device *vfd = video_devdata(file);
2161 struct v4l2_queryctrl *p = arg;
2162 struct v4l2_fh *vfh =
2163 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2164
2165 if (vfh && vfh->ctrl_handler)
2166 return v4l2_queryctrl(vfh->ctrl_handler, p);
2167 if (vfd->ctrl_handler)
2168 return v4l2_queryctrl(vfd->ctrl_handler, p);
2169 if (ops->vidioc_queryctrl)
2170 return ops->vidioc_queryctrl(file, fh, p);
2171 return -ENOTTY;
2172 }
2173
2174 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2175 struct file *file, void *fh, void *arg)
2176 {
2177 struct video_device *vfd = video_devdata(file);
2178 struct v4l2_query_ext_ctrl *p = arg;
2179 struct v4l2_fh *vfh =
2180 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2181
2182 if (vfh && vfh->ctrl_handler)
2183 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2184 if (vfd->ctrl_handler)
2185 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2186 if (ops->vidioc_query_ext_ctrl)
2187 return ops->vidioc_query_ext_ctrl(file, fh, p);
2188 return -ENOTTY;
2189 }
2190
2191 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2192 struct file *file, void *fh, void *arg)
2193 {
2194 struct video_device *vfd = video_devdata(file);
2195 struct v4l2_querymenu *p = arg;
2196 struct v4l2_fh *vfh =
2197 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2198
2199 if (vfh && vfh->ctrl_handler)
2200 return v4l2_querymenu(vfh->ctrl_handler, p);
2201 if (vfd->ctrl_handler)
2202 return v4l2_querymenu(vfd->ctrl_handler, p);
2203 if (ops->vidioc_querymenu)
2204 return ops->vidioc_querymenu(file, fh, p);
2205 return -ENOTTY;
2206 }
2207
2208 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2209 struct file *file, void *fh, void *arg)
2210 {
2211 struct video_device *vfd = video_devdata(file);
2212 struct v4l2_control *p = arg;
2213 struct v4l2_fh *vfh =
2214 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2215 struct v4l2_ext_controls ctrls;
2216 struct v4l2_ext_control ctrl;
2217
2218 if (vfh && vfh->ctrl_handler)
2219 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2220 if (vfd->ctrl_handler)
2221 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2222 if (ops->vidioc_g_ctrl)
2223 return ops->vidioc_g_ctrl(file, fh, p);
2224 if (ops->vidioc_g_ext_ctrls == NULL)
2225 return -ENOTTY;
2226
2227 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2228 ctrls.count = 1;
2229 ctrls.controls = &ctrl;
2230 ctrl.id = p->id;
2231 ctrl.value = p->value;
2232 if (check_ext_ctrls(&ctrls, 1)) {
2233 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2234
2235 if (ret == 0)
2236 p->value = ctrl.value;
2237 return ret;
2238 }
2239 return -EINVAL;
2240 }
2241
2242 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2243 struct file *file, void *fh, void *arg)
2244 {
2245 struct video_device *vfd = video_devdata(file);
2246 struct v4l2_control *p = arg;
2247 struct v4l2_fh *vfh =
2248 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2249 struct v4l2_ext_controls ctrls;
2250 struct v4l2_ext_control ctrl;
2251
2252 if (vfh && vfh->ctrl_handler)
2253 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2254 if (vfd->ctrl_handler)
2255 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2256 if (ops->vidioc_s_ctrl)
2257 return ops->vidioc_s_ctrl(file, fh, p);
2258 if (ops->vidioc_s_ext_ctrls == NULL)
2259 return -ENOTTY;
2260
2261 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2262 ctrls.count = 1;
2263 ctrls.controls = &ctrl;
2264 ctrl.id = p->id;
2265 ctrl.value = p->value;
2266 if (check_ext_ctrls(&ctrls, 1))
2267 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2268 return -EINVAL;
2269 }
2270
2271 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2272 struct file *file, void *fh, void *arg)
2273 {
2274 struct video_device *vfd = video_devdata(file);
2275 struct v4l2_ext_controls *p = arg;
2276 struct v4l2_fh *vfh =
2277 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2278
2279 p->error_idx = p->count;
2280 if (vfh && vfh->ctrl_handler)
2281 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2282 vfd, vfd->v4l2_dev->mdev, p);
2283 if (vfd->ctrl_handler)
2284 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2285 vfd, vfd->v4l2_dev->mdev, p);
2286 if (ops->vidioc_g_ext_ctrls == NULL)
2287 return -ENOTTY;
2288 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2289 -EINVAL;
2290 }
2291
2292 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2293 struct file *file, void *fh, void *arg)
2294 {
2295 struct video_device *vfd = video_devdata(file);
2296 struct v4l2_ext_controls *p = arg;
2297 struct v4l2_fh *vfh =
2298 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2299
2300 p->error_idx = p->count;
2301 if (vfh && vfh->ctrl_handler)
2302 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2303 vfd, vfd->v4l2_dev->mdev, p);
2304 if (vfd->ctrl_handler)
2305 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2306 vfd, vfd->v4l2_dev->mdev, p);
2307 if (ops->vidioc_s_ext_ctrls == NULL)
2308 return -ENOTTY;
2309 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2310 -EINVAL;
2311 }
2312
2313 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2314 struct file *file, void *fh, void *arg)
2315 {
2316 struct video_device *vfd = video_devdata(file);
2317 struct v4l2_ext_controls *p = arg;
2318 struct v4l2_fh *vfh =
2319 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2320
2321 p->error_idx = p->count;
2322 if (vfh && vfh->ctrl_handler)
2323 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2324 vfd, vfd->v4l2_dev->mdev, p);
2325 if (vfd->ctrl_handler)
2326 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2327 vfd, vfd->v4l2_dev->mdev, p);
2328 if (ops->vidioc_try_ext_ctrls == NULL)
2329 return -ENOTTY;
2330 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2331 -EINVAL;
2332 }
2333
2334 /*
2335 * The selection API specified originally that the _MPLANE buffer types
2336 * shouldn't be used. The reasons for this are lost in the mists of time
2337 * (or just really crappy memories). Regardless, this is really annoying
2338 * for userspace. So to keep things simple we map _MPLANE buffer types
2339 * to their 'regular' counterparts before calling the driver. And we
2340 * restore it afterwards. This way applications can use either buffer
2341 * type and drivers don't need to check for both.
2342 */
2343 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2344 struct file *file, void *fh, void *arg)
2345 {
2346 struct v4l2_selection *p = arg;
2347 u32 old_type = p->type;
2348 int ret;
2349
2350 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2351 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2352 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2353 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2354 ret = ops->vidioc_g_selection(file, fh, p);
2355 p->type = old_type;
2356 return ret;
2357 }
2358
2359 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2360 struct file *file, void *fh, void *arg)
2361 {
2362 struct v4l2_selection *p = arg;
2363 u32 old_type = p->type;
2364 int ret;
2365
2366 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2367 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2368 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2369 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2370 ret = ops->vidioc_s_selection(file, fh, p);
2371 p->type = old_type;
2372 return ret;
2373 }
2374
2375 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2376 struct file *file, void *fh, void *arg)
2377 {
2378 struct video_device *vfd = video_devdata(file);
2379 struct v4l2_crop *p = arg;
2380 struct v4l2_selection s = {
2381 .type = p->type,
2382 };
2383 int ret;
2384
2385 /* simulate capture crop using selection api */
2386
2387 /* crop means compose for output devices */
2388 if (V4L2_TYPE_IS_OUTPUT(p->type))
2389 s.target = V4L2_SEL_TGT_COMPOSE;
2390 else
2391 s.target = V4L2_SEL_TGT_CROP;
2392
2393 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2394 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2395 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2396
2397 ret = v4l_g_selection(ops, file, fh, &s);
2398
2399 /* copying results to old structure on success */
2400 if (!ret)
2401 p->c = s.r;
2402 return ret;
2403 }
2404
2405 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2406 struct file *file, void *fh, void *arg)
2407 {
2408 struct video_device *vfd = video_devdata(file);
2409 struct v4l2_crop *p = arg;
2410 struct v4l2_selection s = {
2411 .type = p->type,
2412 .r = p->c,
2413 };
2414
2415 /* simulate capture crop using selection api */
2416
2417 /* crop means compose for output devices */
2418 if (V4L2_TYPE_IS_OUTPUT(p->type))
2419 s.target = V4L2_SEL_TGT_COMPOSE;
2420 else
2421 s.target = V4L2_SEL_TGT_CROP;
2422
2423 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2424 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2425 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2426
2427 return v4l_s_selection(ops, file, fh, &s);
2428 }
2429
2430 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2431 struct file *file, void *fh, void *arg)
2432 {
2433 struct video_device *vfd = video_devdata(file);
2434 struct v4l2_cropcap *p = arg;
2435 struct v4l2_selection s = { .type = p->type };
2436 int ret = 0;
2437
2438 /* setting trivial pixelaspect */
2439 p->pixelaspect.numerator = 1;
2440 p->pixelaspect.denominator = 1;
2441
2442 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2443 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2444 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2445 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2446
2447 /*
2448 * The determine_valid_ioctls() call already should ensure
2449 * that this can never happen, but just in case...
2450 */
2451 if (WARN_ON(!ops->vidioc_g_selection))
2452 return -ENOTTY;
2453
2454 if (ops->vidioc_g_pixelaspect)
2455 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2456 &p->pixelaspect);
2457
2458 /*
2459 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2460 * square pixel aspect ratio in that case.
2461 */
2462 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2463 return ret;
2464
2465 /* Use g_selection() to fill in the bounds and defrect rectangles */
2466
2467 /* obtaining bounds */
2468 if (V4L2_TYPE_IS_OUTPUT(p->type))
2469 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2470 else
2471 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2472
2473 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2474 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2475 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2476
2477 ret = v4l_g_selection(ops, file, fh, &s);
2478 if (ret)
2479 return ret;
2480 p->bounds = s.r;
2481
2482 /* obtaining defrect */
2483 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2484 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2485 else
2486 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2487
2488 ret = v4l_g_selection(ops, file, fh, &s);
2489 if (ret)
2490 return ret;
2491 p->defrect = s.r;
2492
2493 return 0;
2494 }
2495
2496 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2497 struct file *file, void *fh, void *arg)
2498 {
2499 struct video_device *vfd = video_devdata(file);
2500 int ret;
2501
2502 if (vfd->v4l2_dev)
2503 pr_info("%s: ================= START STATUS =================\n",
2504 vfd->v4l2_dev->name);
2505 ret = ops->vidioc_log_status(file, fh);
2506 if (vfd->v4l2_dev)
2507 pr_info("%s: ================== END STATUS ==================\n",
2508 vfd->v4l2_dev->name);
2509 return ret;
2510 }
2511
2512 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2513 struct file *file, void *fh, void *arg)
2514 {
2515 #ifdef CONFIG_VIDEO_ADV_DEBUG
2516 struct v4l2_dbg_register *p = arg;
2517 struct video_device *vfd = video_devdata(file);
2518 struct v4l2_subdev *sd;
2519 int idx = 0;
2520
2521 if (!capable(CAP_SYS_ADMIN))
2522 return -EPERM;
2523 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2524 if (vfd->v4l2_dev == NULL)
2525 return -EINVAL;
2526 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2527 if (p->match.addr == idx++)
2528 return v4l2_subdev_call(sd, core, g_register, p);
2529 return -EINVAL;
2530 }
2531 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2532 (ops->vidioc_g_chip_info || p->match.addr == 0))
2533 return ops->vidioc_g_register(file, fh, p);
2534 return -EINVAL;
2535 #else
2536 return -ENOTTY;
2537 #endif
2538 }
2539
2540 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2541 struct file *file, void *fh, void *arg)
2542 {
2543 #ifdef CONFIG_VIDEO_ADV_DEBUG
2544 const struct v4l2_dbg_register *p = arg;
2545 struct video_device *vfd = video_devdata(file);
2546 struct v4l2_subdev *sd;
2547 int idx = 0;
2548
2549 if (!capable(CAP_SYS_ADMIN))
2550 return -EPERM;
2551 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2552 if (vfd->v4l2_dev == NULL)
2553 return -EINVAL;
2554 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2555 if (p->match.addr == idx++)
2556 return v4l2_subdev_call(sd, core, s_register, p);
2557 return -EINVAL;
2558 }
2559 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2560 (ops->vidioc_g_chip_info || p->match.addr == 0))
2561 return ops->vidioc_s_register(file, fh, p);
2562 return -EINVAL;
2563 #else
2564 return -ENOTTY;
2565 #endif
2566 }
2567
2568 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2569 struct file *file, void *fh, void *arg)
2570 {
2571 #ifdef CONFIG_VIDEO_ADV_DEBUG
2572 struct video_device *vfd = video_devdata(file);
2573 struct v4l2_dbg_chip_info *p = arg;
2574 struct v4l2_subdev *sd;
2575 int idx = 0;
2576
2577 switch (p->match.type) {
2578 case V4L2_CHIP_MATCH_BRIDGE:
2579 if (ops->vidioc_s_register)
2580 p->flags |= V4L2_CHIP_FL_WRITABLE;
2581 if (ops->vidioc_g_register)
2582 p->flags |= V4L2_CHIP_FL_READABLE;
2583 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2584 if (ops->vidioc_g_chip_info)
2585 return ops->vidioc_g_chip_info(file, fh, arg);
2586 if (p->match.addr)
2587 return -EINVAL;
2588 return 0;
2589
2590 case V4L2_CHIP_MATCH_SUBDEV:
2591 if (vfd->v4l2_dev == NULL)
2592 break;
2593 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2594 if (p->match.addr != idx++)
2595 continue;
2596 if (sd->ops->core && sd->ops->core->s_register)
2597 p->flags |= V4L2_CHIP_FL_WRITABLE;
2598 if (sd->ops->core && sd->ops->core->g_register)
2599 p->flags |= V4L2_CHIP_FL_READABLE;
2600 strscpy(p->name, sd->name, sizeof(p->name));
2601 return 0;
2602 }
2603 break;
2604 }
2605 return -EINVAL;
2606 #else
2607 return -ENOTTY;
2608 #endif
2609 }
2610
2611 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2612 struct file *file, void *fh, void *arg)
2613 {
2614 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2615 }
2616
2617 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2618 struct file *file, void *fh, void *arg)
2619 {
2620 return ops->vidioc_subscribe_event(fh, arg);
2621 }
2622
2623 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2624 struct file *file, void *fh, void *arg)
2625 {
2626 return ops->vidioc_unsubscribe_event(fh, arg);
2627 }
2628
2629 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2630 struct file *file, void *fh, void *arg)
2631 {
2632 struct v4l2_sliced_vbi_cap *p = arg;
2633 int ret = check_fmt(file, p->type);
2634
2635 if (ret)
2636 return ret;
2637
2638 /* Clear up to type, everything after type is zeroed already */
2639 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2640
2641 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2642 }
2643
2644 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2645 struct file *file, void *fh, void *arg)
2646 {
2647 struct video_device *vfd = video_devdata(file);
2648 struct v4l2_frequency_band *p = arg;
2649 enum v4l2_tuner_type type;
2650 int err;
2651
2652 if (vfd->vfl_type == VFL_TYPE_SDR) {
2653 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2654 return -EINVAL;
2655 type = p->type;
2656 } else {
2657 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2658 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2659 if (type != p->type)
2660 return -EINVAL;
2661 }
2662 if (ops->vidioc_enum_freq_bands) {
2663 err = ops->vidioc_enum_freq_bands(file, fh, p);
2664 if (err != -ENOTTY)
2665 return err;
2666 }
2667 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2668 struct v4l2_tuner t = {
2669 .index = p->tuner,
2670 .type = type,
2671 };
2672
2673 if (p->index)
2674 return -EINVAL;
2675 err = ops->vidioc_g_tuner(file, fh, &t);
2676 if (err)
2677 return err;
2678 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2679 p->rangelow = t.rangelow;
2680 p->rangehigh = t.rangehigh;
2681 p->modulation = (type == V4L2_TUNER_RADIO) ?
2682 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2683 return 0;
2684 }
2685 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2686 struct v4l2_modulator m = {
2687 .index = p->tuner,
2688 };
2689
2690 if (type != V4L2_TUNER_RADIO)
2691 return -EINVAL;
2692 if (p->index)
2693 return -EINVAL;
2694 err = ops->vidioc_g_modulator(file, fh, &m);
2695 if (err)
2696 return err;
2697 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2698 p->rangelow = m.rangelow;
2699 p->rangehigh = m.rangehigh;
2700 p->modulation = (type == V4L2_TUNER_RADIO) ?
2701 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2702 return 0;
2703 }
2704 return -ENOTTY;
2705 }
2706
2707 struct v4l2_ioctl_info {
2708 unsigned int ioctl;
2709 u32 flags;
2710 const char * const name;
2711 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2712 void *fh, void *p);
2713 void (*debug)(const void *arg, bool write_only);
2714 };
2715
2716 /* This control needs a priority check */
2717 #define INFO_FL_PRIO (1 << 0)
2718 /* This control can be valid if the filehandle passes a control handler. */
2719 #define INFO_FL_CTRL (1 << 1)
2720 /* Queuing ioctl */
2721 #define INFO_FL_QUEUE (1 << 2)
2722 /* Always copy back result, even on error */
2723 #define INFO_FL_ALWAYS_COPY (1 << 3)
2724 /* Zero struct from after the field to the end */
2725 #define INFO_FL_CLEAR(v4l2_struct, field) \
2726 ((offsetof(struct v4l2_struct, field) + \
2727 sizeof_field(struct v4l2_struct, field)) << 16)
2728 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2729
2730 #define DEFINE_V4L_STUB_FUNC(_vidioc) \
2731 static int v4l_stub_ ## _vidioc( \
2732 const struct v4l2_ioctl_ops *ops, \
2733 struct file *file, void *fh, void *p) \
2734 { \
2735 return ops->vidioc_ ## _vidioc(file, fh, p); \
2736 }
2737
2738 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
2739 [_IOC_NR(_ioctl)] = { \
2740 .ioctl = _ioctl, \
2741 .flags = _flags, \
2742 .name = #_ioctl, \
2743 .func = _func, \
2744 .debug = _debug, \
2745 }
2746
2747 DEFINE_V4L_STUB_FUNC(g_fbuf)
2748 DEFINE_V4L_STUB_FUNC(s_fbuf)
2749 DEFINE_V4L_STUB_FUNC(expbuf)
2750 DEFINE_V4L_STUB_FUNC(g_std)
2751 DEFINE_V4L_STUB_FUNC(g_audio)
2752 DEFINE_V4L_STUB_FUNC(s_audio)
2753 DEFINE_V4L_STUB_FUNC(g_edid)
2754 DEFINE_V4L_STUB_FUNC(s_edid)
2755 DEFINE_V4L_STUB_FUNC(g_audout)
2756 DEFINE_V4L_STUB_FUNC(s_audout)
2757 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2758 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2759 DEFINE_V4L_STUB_FUNC(enumaudio)
2760 DEFINE_V4L_STUB_FUNC(enumaudout)
2761 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2762 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2763 DEFINE_V4L_STUB_FUNC(g_enc_index)
2764 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2765 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2766 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2767 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2768 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2769 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2770 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2771 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2772 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2773
2774 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2775 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2776 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2777 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2778 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2779 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2780 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2781 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2782 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2783 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2784 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2785 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2786 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2787 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2788 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2789 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2790 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2791 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2792 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2793 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2794 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2795 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2796 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2797 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2798 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2799 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2800 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2801 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2802 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2803 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2804 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2805 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2806 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2807 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2808 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2809 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2810 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2811 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2812 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2813 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2814 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2815 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2816 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2817 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2818 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2819 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2820 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2821 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2822 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2823 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2824 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2825 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2826 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2827 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2828 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2829 IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
2830 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2831 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2832 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2833 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2834 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2835 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2836 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2837 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2838 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2839 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2840 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2841 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2842 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2843 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2844 IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
2845 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2846 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2847 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2848 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2849 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2850 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2851 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2852 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2853 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2854 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2855 IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2856 IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
2857 };
2858 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2859
2860 static bool v4l2_is_known_ioctl(unsigned int cmd)
2861 {
2862 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2863 return false;
2864 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2865 }
2866
2867 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2868 struct v4l2_fh *vfh, unsigned int cmd,
2869 void *arg)
2870 {
2871 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2872 return vdev->lock;
2873 if (vfh && vfh->m2m_ctx &&
2874 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2875 if (vfh->m2m_ctx->q_lock)
2876 return vfh->m2m_ctx->q_lock;
2877 }
2878 if (vdev->queue && vdev->queue->lock &&
2879 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2880 return vdev->queue->lock;
2881 return vdev->lock;
2882 }
2883
2884 /* Common ioctl debug function. This function can be used by
2885 external ioctl messages as well as internal V4L ioctl */
2886 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2887 {
2888 const char *dir, *type;
2889
2890 if (prefix)
2891 printk(KERN_DEBUG "%s: ", prefix);
2892
2893 switch (_IOC_TYPE(cmd)) {
2894 case 'd':
2895 type = "v4l2_int";
2896 break;
2897 case 'V':
2898 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2899 type = "v4l2";
2900 break;
2901 }
2902 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2903 return;
2904 default:
2905 type = "unknown";
2906 break;
2907 }
2908
2909 switch (_IOC_DIR(cmd)) {
2910 case _IOC_NONE: dir = "--"; break;
2911 case _IOC_READ: dir = "r-"; break;
2912 case _IOC_WRITE: dir = "-w"; break;
2913 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2914 default: dir = "*ERR*"; break;
2915 }
2916 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2917 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2918 }
2919 EXPORT_SYMBOL(v4l_printk_ioctl);
2920
2921 static long __video_do_ioctl(struct file *file,
2922 unsigned int cmd, void *arg)
2923 {
2924 struct video_device *vfd = video_devdata(file);
2925 struct mutex *req_queue_lock = NULL;
2926 struct mutex *lock; /* ioctl serialization mutex */
2927 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2928 bool write_only = false;
2929 struct v4l2_ioctl_info default_info;
2930 const struct v4l2_ioctl_info *info;
2931 void *fh = file->private_data;
2932 struct v4l2_fh *vfh = NULL;
2933 int dev_debug = vfd->dev_debug;
2934 long ret = -ENOTTY;
2935
2936 if (ops == NULL) {
2937 pr_warn("%s: has no ioctl_ops.\n",
2938 video_device_node_name(vfd));
2939 return ret;
2940 }
2941
2942 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2943 vfh = file->private_data;
2944
2945 /*
2946 * We need to serialize streamon/off with queueing new requests.
2947 * These ioctls may trigger the cancellation of a streaming
2948 * operation, and that should not be mixed with queueing a new
2949 * request at the same time.
2950 */
2951 if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2952 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2953 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2954
2955 if (mutex_lock_interruptible(req_queue_lock))
2956 return -ERESTARTSYS;
2957 }
2958
2959 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2960
2961 if (lock && mutex_lock_interruptible(lock)) {
2962 if (req_queue_lock)
2963 mutex_unlock(req_queue_lock);
2964 return -ERESTARTSYS;
2965 }
2966
2967 if (!video_is_registered(vfd)) {
2968 ret = -ENODEV;
2969 goto unlock;
2970 }
2971
2972 if (v4l2_is_known_ioctl(cmd)) {
2973 info = &v4l2_ioctls[_IOC_NR(cmd)];
2974
2975 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2976 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2977 goto done;
2978
2979 if (vfh && (info->flags & INFO_FL_PRIO)) {
2980 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2981 if (ret)
2982 goto done;
2983 }
2984 } else {
2985 default_info.ioctl = cmd;
2986 default_info.flags = 0;
2987 default_info.debug = v4l_print_default;
2988 info = &default_info;
2989 }
2990
2991 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2992 if (info != &default_info) {
2993 ret = info->func(ops, file, fh, arg);
2994 } else if (!ops->vidioc_default) {
2995 ret = -ENOTTY;
2996 } else {
2997 ret = ops->vidioc_default(file, fh,
2998 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2999 cmd, arg);
3000 }
3001
3002 done:
3003 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
3004 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
3005 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
3006 goto unlock;
3007
3008 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
3009 if (ret < 0)
3010 pr_cont(": error %ld", ret);
3011 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
3012 pr_cont("\n");
3013 else if (_IOC_DIR(cmd) == _IOC_NONE)
3014 info->debug(arg, write_only);
3015 else {
3016 pr_cont(": ");
3017 info->debug(arg, write_only);
3018 }
3019 }
3020
3021 unlock:
3022 if (lock)
3023 mutex_unlock(lock);
3024 if (req_queue_lock)
3025 mutex_unlock(req_queue_lock);
3026 return ret;
3027 }
3028
3029 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
3030 void __user **user_ptr, void ***kernel_ptr)
3031 {
3032 int ret = 0;
3033
3034 switch (cmd) {
3035 case VIDIOC_PREPARE_BUF:
3036 case VIDIOC_QUERYBUF:
3037 case VIDIOC_QBUF:
3038 case VIDIOC_DQBUF: {
3039 struct v4l2_buffer *buf = parg;
3040
3041 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3042 if (buf->length > VIDEO_MAX_PLANES) {
3043 ret = -EINVAL;
3044 break;
3045 }
3046 *user_ptr = (void __user *)buf->m.planes;
3047 *kernel_ptr = (void **)&buf->m.planes;
3048 *array_size = sizeof(struct v4l2_plane) * buf->length;
3049 ret = 1;
3050 }
3051 break;
3052 }
3053
3054 case VIDIOC_G_EDID:
3055 case VIDIOC_S_EDID: {
3056 struct v4l2_edid *edid = parg;
3057
3058 if (edid->blocks) {
3059 if (edid->blocks > 256) {
3060 ret = -EINVAL;
3061 break;
3062 }
3063 *user_ptr = (void __user *)edid->edid;
3064 *kernel_ptr = (void **)&edid->edid;
3065 *array_size = edid->blocks * 128;
3066 ret = 1;
3067 }
3068 break;
3069 }
3070
3071 case VIDIOC_S_EXT_CTRLS:
3072 case VIDIOC_G_EXT_CTRLS:
3073 case VIDIOC_TRY_EXT_CTRLS: {
3074 struct v4l2_ext_controls *ctrls = parg;
3075
3076 if (ctrls->count != 0) {
3077 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3078 ret = -EINVAL;
3079 break;
3080 }
3081 *user_ptr = (void __user *)ctrls->controls;
3082 *kernel_ptr = (void **)&ctrls->controls;
3083 *array_size = sizeof(struct v4l2_ext_control)
3084 * ctrls->count;
3085 ret = 1;
3086 }
3087 break;
3088 }
3089 case VIDIOC_G_FMT:
3090 case VIDIOC_S_FMT:
3091 case VIDIOC_TRY_FMT: {
3092 struct v4l2_format *fmt = parg;
3093
3094 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3095 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3096 break;
3097 if (fmt->fmt.win.clipcount > 2048)
3098 return -EINVAL;
3099 if (!fmt->fmt.win.clipcount)
3100 break;
3101
3102 *user_ptr = (void __user *)fmt->fmt.win.clips;
3103 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3104 *array_size = sizeof(struct v4l2_clip)
3105 * fmt->fmt.win.clipcount;
3106
3107 ret = 1;
3108 break;
3109 }
3110 }
3111
3112 return ret;
3113 }
3114
3115 static unsigned int video_translate_cmd(unsigned int cmd)
3116 {
3117 switch (cmd) {
3118 #ifdef CONFIG_COMPAT_32BIT_TIME
3119 case VIDIOC_DQEVENT_TIME32:
3120 return VIDIOC_DQEVENT;
3121 case VIDIOC_QUERYBUF_TIME32:
3122 return VIDIOC_QUERYBUF;
3123 case VIDIOC_QBUF_TIME32:
3124 return VIDIOC_QBUF;
3125 case VIDIOC_DQBUF_TIME32:
3126 return VIDIOC_DQBUF;
3127 case VIDIOC_PREPARE_BUF_TIME32:
3128 return VIDIOC_PREPARE_BUF;
3129 #endif
3130 }
3131 if (in_compat_syscall())
3132 return v4l2_compat_translate_cmd(cmd);
3133
3134 return cmd;
3135 }
3136
3137 static int video_get_user(void __user *arg, void *parg,
3138 unsigned int real_cmd, unsigned int cmd,
3139 bool *always_copy)
3140 {
3141 unsigned int n = _IOC_SIZE(real_cmd);
3142 int err = 0;
3143
3144 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3145 /* read-only ioctl */
3146 memset(parg, 0, n);
3147 return 0;
3148 }
3149
3150 /*
3151 * In some cases, only a few fields are used as input,
3152 * i.e. when the app sets "index" and then the driver
3153 * fills in the rest of the structure for the thing
3154 * with that index. We only need to copy up the first
3155 * non-input field.
3156 */
3157 if (v4l2_is_known_ioctl(real_cmd)) {
3158 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3159
3160 if (flags & INFO_FL_CLEAR_MASK)
3161 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3162 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3163 }
3164
3165 if (cmd == real_cmd) {
3166 if (copy_from_user(parg, (void __user *)arg, n))
3167 err = -EFAULT;
3168 } else if (in_compat_syscall()) {
3169 err = v4l2_compat_get_user(arg, parg, cmd);
3170 } else {
3171 switch (cmd) {
3172 #ifdef CONFIG_COMPAT_32BIT_TIME
3173 case VIDIOC_QUERYBUF_TIME32:
3174 case VIDIOC_QBUF_TIME32:
3175 case VIDIOC_DQBUF_TIME32:
3176 case VIDIOC_PREPARE_BUF_TIME32: {
3177 struct v4l2_buffer_time32 vb32;
3178 struct v4l2_buffer *vb = parg;
3179
3180 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3181 return -EFAULT;
3182
3183 *vb = (struct v4l2_buffer) {
3184 .index = vb32.index,
3185 .type = vb32.type,
3186 .bytesused = vb32.bytesused,
3187 .flags = vb32.flags,
3188 .field = vb32.field,
3189 .timestamp.tv_sec = vb32.timestamp.tv_sec,
3190 .timestamp.tv_usec = vb32.timestamp.tv_usec,
3191 .timecode = vb32.timecode,
3192 .sequence = vb32.sequence,
3193 .memory = vb32.memory,
3194 .m.userptr = vb32.m.userptr,
3195 .length = vb32.length,
3196 .request_fd = vb32.request_fd,
3197 };
3198 break;
3199 }
3200 #endif
3201 }
3202 }
3203
3204 /* zero out anything we don't copy from userspace */
3205 if (!err && n < _IOC_SIZE(real_cmd))
3206 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3207 return err;
3208 }
3209
3210 static int video_put_user(void __user *arg, void *parg,
3211 unsigned int real_cmd, unsigned int cmd)
3212 {
3213 if (!(_IOC_DIR(cmd) & _IOC_READ))
3214 return 0;
3215
3216 if (cmd == real_cmd) {
3217 /* Copy results into user buffer */
3218 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3219 return -EFAULT;
3220 return 0;
3221 }
3222
3223 if (in_compat_syscall())
3224 return v4l2_compat_put_user(arg, parg, cmd);
3225
3226 switch (cmd) {
3227 #ifdef CONFIG_COMPAT_32BIT_TIME
3228 case VIDIOC_DQEVENT_TIME32: {
3229 struct v4l2_event *ev = parg;
3230 struct v4l2_event_time32 ev32;
3231
3232 memset(&ev32, 0, sizeof(ev32));
3233
3234 ev32.type = ev->type;
3235 ev32.pending = ev->pending;
3236 ev32.sequence = ev->sequence;
3237 ev32.timestamp.tv_sec = ev->timestamp.tv_sec;
3238 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec;
3239 ev32.id = ev->id;
3240
3241 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3242 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3243
3244 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3245 return -EFAULT;
3246 break;
3247 }
3248 case VIDIOC_QUERYBUF_TIME32:
3249 case VIDIOC_QBUF_TIME32:
3250 case VIDIOC_DQBUF_TIME32:
3251 case VIDIOC_PREPARE_BUF_TIME32: {
3252 struct v4l2_buffer *vb = parg;
3253 struct v4l2_buffer_time32 vb32;
3254
3255 memset(&vb32, 0, sizeof(vb32));
3256
3257 vb32.index = vb->index;
3258 vb32.type = vb->type;
3259 vb32.bytesused = vb->bytesused;
3260 vb32.flags = vb->flags;
3261 vb32.field = vb->field;
3262 vb32.timestamp.tv_sec = vb->timestamp.tv_sec;
3263 vb32.timestamp.tv_usec = vb->timestamp.tv_usec;
3264 vb32.timecode = vb->timecode;
3265 vb32.sequence = vb->sequence;
3266 vb32.memory = vb->memory;
3267 vb32.m.userptr = vb->m.userptr;
3268 vb32.length = vb->length;
3269 vb32.request_fd = vb->request_fd;
3270
3271 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3272 return -EFAULT;
3273 break;
3274 }
3275 #endif
3276 }
3277
3278 return 0;
3279 }
3280
3281 long
3282 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3283 v4l2_kioctl func)
3284 {
3285 char sbuf[128];
3286 void *mbuf = NULL;
3287 void *parg = (void *)arg;
3288 long err = -EINVAL;
3289 bool has_array_args;
3290 bool always_copy = false;
3291 size_t array_size = 0;
3292 void __user *user_ptr = NULL;
3293 void **kernel_ptr = NULL;
3294 unsigned int cmd = video_translate_cmd(orig_cmd);
3295 const size_t ioc_size = _IOC_SIZE(cmd);
3296
3297 /* Copy arguments into temp kernel buffer */
3298 if (_IOC_DIR(cmd) != _IOC_NONE) {
3299 if (ioc_size <= sizeof(sbuf)) {
3300 parg = sbuf;
3301 } else {
3302 /* too big to allocate from stack */
3303 mbuf = kvmalloc(ioc_size, GFP_KERNEL);
3304 if (NULL == mbuf)
3305 return -ENOMEM;
3306 parg = mbuf;
3307 }
3308
3309 err = video_get_user((void __user *)arg, parg, cmd,
3310 orig_cmd, &always_copy);
3311 if (err)
3312 goto out;
3313 }
3314
3315 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3316 if (err < 0)
3317 goto out;
3318 has_array_args = err;
3319
3320 if (has_array_args) {
3321 /*
3322 * When adding new types of array args, make sure that the
3323 * parent argument to ioctl (which contains the pointer to the
3324 * array) fits into sbuf (so that mbuf will still remain
3325 * unused up to here).
3326 */
3327 mbuf = kvmalloc(array_size, GFP_KERNEL);
3328 err = -ENOMEM;
3329 if (NULL == mbuf)
3330 goto out_array_args;
3331 err = -EFAULT;
3332 if (in_compat_syscall())
3333 err = v4l2_compat_get_array_args(file, mbuf, user_ptr,
3334 array_size, orig_cmd,
3335 parg);
3336 else
3337 err = copy_from_user(mbuf, user_ptr, array_size) ?
3338 -EFAULT : 0;
3339 if (err)
3340 goto out_array_args;
3341 *kernel_ptr = mbuf;
3342 }
3343
3344 /* Handles IOCTL */
3345 err = func(file, cmd, parg);
3346 if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3347 err = -ENOTTY;
3348 goto out;
3349 }
3350
3351 if (err == 0) {
3352 if (cmd == VIDIOC_DQBUF)
3353 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3354 else if (cmd == VIDIOC_QBUF)
3355 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3356 }
3357
3358 if (has_array_args) {
3359 *kernel_ptr = (void __force *)user_ptr;
3360 if (in_compat_syscall()) {
3361 int put_err;
3362
3363 put_err = v4l2_compat_put_array_args(file, user_ptr, mbuf,
3364 array_size, orig_cmd,
3365 parg);
3366 if (put_err)
3367 err = put_err;
3368 } else if (copy_to_user(user_ptr, mbuf, array_size)) {
3369 err = -EFAULT;
3370 }
3371 goto out_array_args;
3372 }
3373 /*
3374 * Some ioctls can return an error, but still have valid
3375 * results that must be returned.
3376 */
3377 if (err < 0 && !always_copy)
3378 goto out;
3379
3380 out_array_args:
3381 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3382 err = -EFAULT;
3383 out:
3384 kvfree(mbuf);
3385 return err;
3386 }
3387
3388 long video_ioctl2(struct file *file,
3389 unsigned int cmd, unsigned long arg)
3390 {
3391 return video_usercopy(file, cmd, arg, __video_do_ioctl);
3392 }
3393 EXPORT_SYMBOL(video_ioctl2);
Linux with added FPC-III support