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Merge tag 'iommu-fixes-v5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-focal-kernel.git] / drivers / media / v4l2-core / v4l2-ioctl.c
1 /*
2 * Video capture interface for Linux version 2
3 *
4 * A generic framework to process V4L2 ioctl commands.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
13 */
14
15 #include <linux/mm.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/types.h>
19 #include <linux/kernel.h>
20 #include <linux/version.h>
21
22 #include <linux/videodev2.h>
23
24 #include <media/v4l2-common.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-fh.h>
28 #include <media/v4l2-event.h>
29 #include <media/v4l2-device.h>
30 #include <media/videobuf2-v4l2.h>
31 #include <media/v4l2-mc.h>
32 #include <media/v4l2-mem2mem.h>
33
34 #include <trace/events/v4l2.h>
35
36 /* Zero out the end of the struct pointed to by p. Everything after, but
37 * not including, the specified field is cleared. */
38 #define CLEAR_AFTER_FIELD(p, field) \
39 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
40 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
41
42 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
43
44 struct std_descr {
45 v4l2_std_id std;
46 const char *descr;
47 };
48
49 static const struct std_descr standards[] = {
50 { V4L2_STD_NTSC, "NTSC" },
51 { V4L2_STD_NTSC_M, "NTSC-M" },
52 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
53 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
54 { V4L2_STD_NTSC_443, "NTSC-443" },
55 { V4L2_STD_PAL, "PAL" },
56 { V4L2_STD_PAL_BG, "PAL-BG" },
57 { V4L2_STD_PAL_B, "PAL-B" },
58 { V4L2_STD_PAL_B1, "PAL-B1" },
59 { V4L2_STD_PAL_G, "PAL-G" },
60 { V4L2_STD_PAL_H, "PAL-H" },
61 { V4L2_STD_PAL_I, "PAL-I" },
62 { V4L2_STD_PAL_DK, "PAL-DK" },
63 { V4L2_STD_PAL_D, "PAL-D" },
64 { V4L2_STD_PAL_D1, "PAL-D1" },
65 { V4L2_STD_PAL_K, "PAL-K" },
66 { V4L2_STD_PAL_M, "PAL-M" },
67 { V4L2_STD_PAL_N, "PAL-N" },
68 { V4L2_STD_PAL_Nc, "PAL-Nc" },
69 { V4L2_STD_PAL_60, "PAL-60" },
70 { V4L2_STD_SECAM, "SECAM" },
71 { V4L2_STD_SECAM_B, "SECAM-B" },
72 { V4L2_STD_SECAM_G, "SECAM-G" },
73 { V4L2_STD_SECAM_H, "SECAM-H" },
74 { V4L2_STD_SECAM_DK, "SECAM-DK" },
75 { V4L2_STD_SECAM_D, "SECAM-D" },
76 { V4L2_STD_SECAM_K, "SECAM-K" },
77 { V4L2_STD_SECAM_K1, "SECAM-K1" },
78 { V4L2_STD_SECAM_L, "SECAM-L" },
79 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
80 { 0, "Unknown" }
81 };
82
83 /* video4linux standard ID conversion to standard name
84 */
85 const char *v4l2_norm_to_name(v4l2_std_id id)
86 {
87 u32 myid = id;
88 int i;
89
90 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
91 64 bit comparations. So, on that architecture, with some gcc
92 variants, compilation fails. Currently, the max value is 30bit wide.
93 */
94 BUG_ON(myid != id);
95
96 for (i = 0; standards[i].std; i++)
97 if (myid == standards[i].std)
98 break;
99 return standards[i].descr;
100 }
101 EXPORT_SYMBOL(v4l2_norm_to_name);
102
103 /* Returns frame period for the given standard */
104 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
105 {
106 if (id & V4L2_STD_525_60) {
107 frameperiod->numerator = 1001;
108 frameperiod->denominator = 30000;
109 } else {
110 frameperiod->numerator = 1;
111 frameperiod->denominator = 25;
112 }
113 }
114 EXPORT_SYMBOL(v4l2_video_std_frame_period);
115
116 /* Fill in the fields of a v4l2_standard structure according to the
117 'id' and 'transmission' parameters. Returns negative on error. */
118 int v4l2_video_std_construct(struct v4l2_standard *vs,
119 int id, const char *name)
120 {
121 vs->id = id;
122 v4l2_video_std_frame_period(id, &vs->frameperiod);
123 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
124 strscpy(vs->name, name, sizeof(vs->name));
125 return 0;
126 }
127 EXPORT_SYMBOL(v4l2_video_std_construct);
128
129 /* Fill in the fields of a v4l2_standard structure according to the
130 * 'id' and 'vs->index' parameters. Returns negative on error. */
131 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
132 {
133 v4l2_std_id curr_id = 0;
134 unsigned int index = vs->index, i, j = 0;
135 const char *descr = "";
136
137 /* Return -ENODATA if the id for the current input
138 or output is 0, meaning that it doesn't support this API. */
139 if (id == 0)
140 return -ENODATA;
141
142 /* Return norm array in a canonical way */
143 for (i = 0; i <= index && id; i++) {
144 /* last std value in the standards array is 0, so this
145 while always ends there since (id & 0) == 0. */
146 while ((id & standards[j].std) != standards[j].std)
147 j++;
148 curr_id = standards[j].std;
149 descr = standards[j].descr;
150 j++;
151 if (curr_id == 0)
152 break;
153 if (curr_id != V4L2_STD_PAL &&
154 curr_id != V4L2_STD_SECAM &&
155 curr_id != V4L2_STD_NTSC)
156 id &= ~curr_id;
157 }
158 if (i <= index)
159 return -EINVAL;
160
161 v4l2_video_std_construct(vs, curr_id, descr);
162 return 0;
163 }
164
165 /* ----------------------------------------------------------------- */
166 /* some arrays for pretty-printing debug messages of enum types */
167
168 const char *v4l2_field_names[] = {
169 [V4L2_FIELD_ANY] = "any",
170 [V4L2_FIELD_NONE] = "none",
171 [V4L2_FIELD_TOP] = "top",
172 [V4L2_FIELD_BOTTOM] = "bottom",
173 [V4L2_FIELD_INTERLACED] = "interlaced",
174 [V4L2_FIELD_SEQ_TB] = "seq-tb",
175 [V4L2_FIELD_SEQ_BT] = "seq-bt",
176 [V4L2_FIELD_ALTERNATE] = "alternate",
177 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
178 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
179 };
180 EXPORT_SYMBOL(v4l2_field_names);
181
182 const char *v4l2_type_names[] = {
183 [0] = "0",
184 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
185 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
186 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
187 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
188 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
189 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
190 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
191 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
192 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
193 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
194 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
195 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
196 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
197 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out",
198 };
199 EXPORT_SYMBOL(v4l2_type_names);
200
201 static const char *v4l2_memory_names[] = {
202 [V4L2_MEMORY_MMAP] = "mmap",
203 [V4L2_MEMORY_USERPTR] = "userptr",
204 [V4L2_MEMORY_OVERLAY] = "overlay",
205 [V4L2_MEMORY_DMABUF] = "dmabuf",
206 };
207
208 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
209
210 /* ------------------------------------------------------------------ */
211 /* debug help functions */
212
213 static void v4l_print_querycap(const void *arg, bool write_only)
214 {
215 const struct v4l2_capability *p = arg;
216
217 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
218 (int)sizeof(p->driver), p->driver,
219 (int)sizeof(p->card), p->card,
220 (int)sizeof(p->bus_info), p->bus_info,
221 p->version, p->capabilities, p->device_caps);
222 }
223
224 static void v4l_print_enuminput(const void *arg, bool write_only)
225 {
226 const struct v4l2_input *p = arg;
227
228 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
229 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
230 p->tuner, (unsigned long long)p->std, p->status,
231 p->capabilities);
232 }
233
234 static void v4l_print_enumoutput(const void *arg, bool write_only)
235 {
236 const struct v4l2_output *p = arg;
237
238 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
239 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
240 p->modulator, (unsigned long long)p->std, p->capabilities);
241 }
242
243 static void v4l_print_audio(const void *arg, bool write_only)
244 {
245 const struct v4l2_audio *p = arg;
246
247 if (write_only)
248 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
249 else
250 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
251 p->index, (int)sizeof(p->name), p->name,
252 p->capability, p->mode);
253 }
254
255 static void v4l_print_audioout(const void *arg, bool write_only)
256 {
257 const struct v4l2_audioout *p = arg;
258
259 if (write_only)
260 pr_cont("index=%u\n", p->index);
261 else
262 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
263 p->index, (int)sizeof(p->name), p->name,
264 p->capability, p->mode);
265 }
266
267 static void v4l_print_fmtdesc(const void *arg, bool write_only)
268 {
269 const struct v4l2_fmtdesc *p = arg;
270
271 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
272 p->index, prt_names(p->type, v4l2_type_names),
273 p->flags, (p->pixelformat & 0xff),
274 (p->pixelformat >> 8) & 0xff,
275 (p->pixelformat >> 16) & 0xff,
276 (p->pixelformat >> 24) & 0xff,
277 (int)sizeof(p->description), p->description);
278 }
279
280 static void v4l_print_format(const void *arg, bool write_only)
281 {
282 const struct v4l2_format *p = arg;
283 const struct v4l2_pix_format *pix;
284 const struct v4l2_pix_format_mplane *mp;
285 const struct v4l2_vbi_format *vbi;
286 const struct v4l2_sliced_vbi_format *sliced;
287 const struct v4l2_window *win;
288 const struct v4l2_sdr_format *sdr;
289 const struct v4l2_meta_format *meta;
290 u32 planes;
291 unsigned i;
292
293 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
294 switch (p->type) {
295 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
296 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
297 pix = &p->fmt.pix;
298 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",
299 pix->width, pix->height,
300 (pix->pixelformat & 0xff),
301 (pix->pixelformat >> 8) & 0xff,
302 (pix->pixelformat >> 16) & 0xff,
303 (pix->pixelformat >> 24) & 0xff,
304 prt_names(pix->field, v4l2_field_names),
305 pix->bytesperline, pix->sizeimage,
306 pix->colorspace, pix->flags, pix->ycbcr_enc,
307 pix->quantization, pix->xfer_func);
308 break;
309 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
310 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
311 mp = &p->fmt.pix_mp;
312 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",
313 mp->width, mp->height,
314 (mp->pixelformat & 0xff),
315 (mp->pixelformat >> 8) & 0xff,
316 (mp->pixelformat >> 16) & 0xff,
317 (mp->pixelformat >> 24) & 0xff,
318 prt_names(mp->field, v4l2_field_names),
319 mp->colorspace, mp->num_planes, mp->flags,
320 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
321 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
322 for (i = 0; i < planes; i++)
323 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
324 mp->plane_fmt[i].bytesperline,
325 mp->plane_fmt[i].sizeimage);
326 break;
327 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
328 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
329 win = &p->fmt.win;
330 /* Note: we can't print the clip list here since the clips
331 * pointer is a userspace pointer, not a kernelspace
332 * pointer. */
333 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",
334 win->w.width, win->w.height, win->w.left, win->w.top,
335 prt_names(win->field, v4l2_field_names),
336 win->chromakey, win->clipcount, win->clips,
337 win->bitmap, win->global_alpha);
338 break;
339 case V4L2_BUF_TYPE_VBI_CAPTURE:
340 case V4L2_BUF_TYPE_VBI_OUTPUT:
341 vbi = &p->fmt.vbi;
342 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
343 vbi->sampling_rate, vbi->offset,
344 vbi->samples_per_line,
345 (vbi->sample_format & 0xff),
346 (vbi->sample_format >> 8) & 0xff,
347 (vbi->sample_format >> 16) & 0xff,
348 (vbi->sample_format >> 24) & 0xff,
349 vbi->start[0], vbi->start[1],
350 vbi->count[0], vbi->count[1]);
351 break;
352 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
353 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
354 sliced = &p->fmt.sliced;
355 pr_cont(", service_set=0x%08x, io_size=%d\n",
356 sliced->service_set, sliced->io_size);
357 for (i = 0; i < 24; i++)
358 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
359 sliced->service_lines[0][i],
360 sliced->service_lines[1][i]);
361 break;
362 case V4L2_BUF_TYPE_SDR_CAPTURE:
363 case V4L2_BUF_TYPE_SDR_OUTPUT:
364 sdr = &p->fmt.sdr;
365 pr_cont(", pixelformat=%c%c%c%c\n",
366 (sdr->pixelformat >> 0) & 0xff,
367 (sdr->pixelformat >> 8) & 0xff,
368 (sdr->pixelformat >> 16) & 0xff,
369 (sdr->pixelformat >> 24) & 0xff);
370 break;
371 case V4L2_BUF_TYPE_META_CAPTURE:
372 case V4L2_BUF_TYPE_META_OUTPUT:
373 meta = &p->fmt.meta;
374 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
375 (meta->dataformat >> 0) & 0xff,
376 (meta->dataformat >> 8) & 0xff,
377 (meta->dataformat >> 16) & 0xff,
378 (meta->dataformat >> 24) & 0xff,
379 meta->buffersize);
380 break;
381 }
382 }
383
384 static void v4l_print_framebuffer(const void *arg, bool write_only)
385 {
386 const struct v4l2_framebuffer *p = arg;
387
388 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",
389 p->capability, p->flags, p->base,
390 p->fmt.width, p->fmt.height,
391 (p->fmt.pixelformat & 0xff),
392 (p->fmt.pixelformat >> 8) & 0xff,
393 (p->fmt.pixelformat >> 16) & 0xff,
394 (p->fmt.pixelformat >> 24) & 0xff,
395 p->fmt.bytesperline, p->fmt.sizeimage,
396 p->fmt.colorspace);
397 }
398
399 static void v4l_print_buftype(const void *arg, bool write_only)
400 {
401 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
402 }
403
404 static void v4l_print_modulator(const void *arg, bool write_only)
405 {
406 const struct v4l2_modulator *p = arg;
407
408 if (write_only)
409 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
410 else
411 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
412 p->index, (int)sizeof(p->name), p->name, p->capability,
413 p->rangelow, p->rangehigh, p->txsubchans);
414 }
415
416 static void v4l_print_tuner(const void *arg, bool write_only)
417 {
418 const struct v4l2_tuner *p = arg;
419
420 if (write_only)
421 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
422 else
423 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",
424 p->index, (int)sizeof(p->name), p->name, p->type,
425 p->capability, p->rangelow,
426 p->rangehigh, p->signal, p->afc,
427 p->rxsubchans, p->audmode);
428 }
429
430 static void v4l_print_frequency(const void *arg, bool write_only)
431 {
432 const struct v4l2_frequency *p = arg;
433
434 pr_cont("tuner=%u, type=%u, frequency=%u\n",
435 p->tuner, p->type, p->frequency);
436 }
437
438 static void v4l_print_standard(const void *arg, bool write_only)
439 {
440 const struct v4l2_standard *p = arg;
441
442 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
443 p->index,
444 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
445 p->frameperiod.numerator,
446 p->frameperiod.denominator,
447 p->framelines);
448 }
449
450 static void v4l_print_std(const void *arg, bool write_only)
451 {
452 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
453 }
454
455 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
456 {
457 const struct v4l2_hw_freq_seek *p = arg;
458
459 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
460 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
461 p->rangelow, p->rangehigh);
462 }
463
464 static void v4l_print_requestbuffers(const void *arg, bool write_only)
465 {
466 const struct v4l2_requestbuffers *p = arg;
467
468 pr_cont("count=%d, type=%s, memory=%s\n",
469 p->count,
470 prt_names(p->type, v4l2_type_names),
471 prt_names(p->memory, v4l2_memory_names));
472 }
473
474 static void v4l_print_buffer(const void *arg, bool write_only)
475 {
476 const struct v4l2_buffer *p = arg;
477 const struct v4l2_timecode *tc = &p->timecode;
478 const struct v4l2_plane *plane;
479 int i;
480
481 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
482 p->timestamp.tv_sec / 3600,
483 (int)(p->timestamp.tv_sec / 60) % 60,
484 (int)(p->timestamp.tv_sec % 60),
485 (long)p->timestamp.tv_usec,
486 p->index,
487 prt_names(p->type, v4l2_type_names), p->request_fd,
488 p->flags, prt_names(p->field, v4l2_field_names),
489 p->sequence, prt_names(p->memory, v4l2_memory_names));
490
491 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
492 pr_cont("\n");
493 for (i = 0; i < p->length; ++i) {
494 plane = &p->m.planes[i];
495 printk(KERN_DEBUG
496 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
497 i, plane->bytesused, plane->data_offset,
498 plane->m.userptr, plane->length);
499 }
500 } else {
501 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
502 p->bytesused, p->m.userptr, p->length);
503 }
504
505 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
506 tc->hours, tc->minutes, tc->seconds,
507 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
508 }
509
510 static void v4l_print_exportbuffer(const void *arg, bool write_only)
511 {
512 const struct v4l2_exportbuffer *p = arg;
513
514 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
515 p->fd, prt_names(p->type, v4l2_type_names),
516 p->index, p->plane, p->flags);
517 }
518
519 static void v4l_print_create_buffers(const void *arg, bool write_only)
520 {
521 const struct v4l2_create_buffers *p = arg;
522
523 pr_cont("index=%d, count=%d, memory=%s, ",
524 p->index, p->count,
525 prt_names(p->memory, v4l2_memory_names));
526 v4l_print_format(&p->format, write_only);
527 }
528
529 static void v4l_print_streamparm(const void *arg, bool write_only)
530 {
531 const struct v4l2_streamparm *p = arg;
532
533 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
534
535 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
536 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
537 const struct v4l2_captureparm *c = &p->parm.capture;
538
539 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
540 c->capability, c->capturemode,
541 c->timeperframe.numerator, c->timeperframe.denominator,
542 c->extendedmode, c->readbuffers);
543 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
544 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
545 const struct v4l2_outputparm *c = &p->parm.output;
546
547 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
548 c->capability, c->outputmode,
549 c->timeperframe.numerator, c->timeperframe.denominator,
550 c->extendedmode, c->writebuffers);
551 } else {
552 pr_cont("\n");
553 }
554 }
555
556 static void v4l_print_queryctrl(const void *arg, bool write_only)
557 {
558 const struct v4l2_queryctrl *p = arg;
559
560 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
561 p->id, p->type, (int)sizeof(p->name), p->name,
562 p->minimum, p->maximum,
563 p->step, p->default_value, p->flags);
564 }
565
566 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
567 {
568 const struct v4l2_query_ext_ctrl *p = arg;
569
570 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",
571 p->id, p->type, (int)sizeof(p->name), p->name,
572 p->minimum, p->maximum,
573 p->step, p->default_value, p->flags,
574 p->elem_size, p->elems, p->nr_of_dims,
575 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
576 }
577
578 static void v4l_print_querymenu(const void *arg, bool write_only)
579 {
580 const struct v4l2_querymenu *p = arg;
581
582 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
583 }
584
585 static void v4l_print_control(const void *arg, bool write_only)
586 {
587 const struct v4l2_control *p = arg;
588
589 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
590 }
591
592 static void v4l_print_ext_controls(const void *arg, bool write_only)
593 {
594 const struct v4l2_ext_controls *p = arg;
595 int i;
596
597 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
598 p->which, p->count, p->error_idx, p->request_fd);
599 for (i = 0; i < p->count; i++) {
600 if (!p->controls[i].size)
601 pr_cont(", id/val=0x%x/0x%x",
602 p->controls[i].id, p->controls[i].value);
603 else
604 pr_cont(", id/size=0x%x/%u",
605 p->controls[i].id, p->controls[i].size);
606 }
607 pr_cont("\n");
608 }
609
610 static void v4l_print_cropcap(const void *arg, bool write_only)
611 {
612 const struct v4l2_cropcap *p = arg;
613
614 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
615 prt_names(p->type, v4l2_type_names),
616 p->bounds.width, p->bounds.height,
617 p->bounds.left, p->bounds.top,
618 p->defrect.width, p->defrect.height,
619 p->defrect.left, p->defrect.top,
620 p->pixelaspect.numerator, p->pixelaspect.denominator);
621 }
622
623 static void v4l_print_crop(const void *arg, bool write_only)
624 {
625 const struct v4l2_crop *p = arg;
626
627 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
628 prt_names(p->type, v4l2_type_names),
629 p->c.width, p->c.height,
630 p->c.left, p->c.top);
631 }
632
633 static void v4l_print_selection(const void *arg, bool write_only)
634 {
635 const struct v4l2_selection *p = arg;
636
637 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
638 prt_names(p->type, v4l2_type_names),
639 p->target, p->flags,
640 p->r.width, p->r.height, p->r.left, p->r.top);
641 }
642
643 static void v4l_print_jpegcompression(const void *arg, bool write_only)
644 {
645 const struct v4l2_jpegcompression *p = arg;
646
647 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
648 p->quality, p->APPn, p->APP_len,
649 p->COM_len, p->jpeg_markers);
650 }
651
652 static void v4l_print_enc_idx(const void *arg, bool write_only)
653 {
654 const struct v4l2_enc_idx *p = arg;
655
656 pr_cont("entries=%d, entries_cap=%d\n",
657 p->entries, p->entries_cap);
658 }
659
660 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
661 {
662 const struct v4l2_encoder_cmd *p = arg;
663
664 pr_cont("cmd=%d, flags=0x%x\n",
665 p->cmd, p->flags);
666 }
667
668 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
669 {
670 const struct v4l2_decoder_cmd *p = arg;
671
672 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
673
674 if (p->cmd == V4L2_DEC_CMD_START)
675 pr_info("speed=%d, format=%u\n",
676 p->start.speed, p->start.format);
677 else if (p->cmd == V4L2_DEC_CMD_STOP)
678 pr_info("pts=%llu\n", p->stop.pts);
679 }
680
681 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
682 {
683 const struct v4l2_dbg_chip_info *p = arg;
684
685 pr_cont("type=%u, ", p->match.type);
686 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
687 pr_cont("name=%.*s, ",
688 (int)sizeof(p->match.name), p->match.name);
689 else
690 pr_cont("addr=%u, ", p->match.addr);
691 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
692 }
693
694 static void v4l_print_dbg_register(const void *arg, bool write_only)
695 {
696 const struct v4l2_dbg_register *p = arg;
697
698 pr_cont("type=%u, ", p->match.type);
699 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
700 pr_cont("name=%.*s, ",
701 (int)sizeof(p->match.name), p->match.name);
702 else
703 pr_cont("addr=%u, ", p->match.addr);
704 pr_cont("reg=0x%llx, val=0x%llx\n",
705 p->reg, p->val);
706 }
707
708 static void v4l_print_dv_timings(const void *arg, bool write_only)
709 {
710 const struct v4l2_dv_timings *p = arg;
711
712 switch (p->type) {
713 case V4L2_DV_BT_656_1120:
714 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",
715 p->bt.interlaced, p->bt.pixelclock,
716 p->bt.width, p->bt.height,
717 p->bt.polarities, p->bt.hfrontporch,
718 p->bt.hsync, p->bt.hbackporch,
719 p->bt.vfrontporch, p->bt.vsync,
720 p->bt.vbackporch, p->bt.il_vfrontporch,
721 p->bt.il_vsync, p->bt.il_vbackporch,
722 p->bt.standards, p->bt.flags);
723 break;
724 default:
725 pr_cont("type=%d\n", p->type);
726 break;
727 }
728 }
729
730 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
731 {
732 const struct v4l2_enum_dv_timings *p = arg;
733
734 pr_cont("index=%u, ", p->index);
735 v4l_print_dv_timings(&p->timings, write_only);
736 }
737
738 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
739 {
740 const struct v4l2_dv_timings_cap *p = arg;
741
742 switch (p->type) {
743 case V4L2_DV_BT_656_1120:
744 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
745 p->bt.min_width, p->bt.max_width,
746 p->bt.min_height, p->bt.max_height,
747 p->bt.min_pixelclock, p->bt.max_pixelclock,
748 p->bt.standards, p->bt.capabilities);
749 break;
750 default:
751 pr_cont("type=%u\n", p->type);
752 break;
753 }
754 }
755
756 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
757 {
758 const struct v4l2_frmsizeenum *p = arg;
759
760 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
761 p->index,
762 (p->pixel_format & 0xff),
763 (p->pixel_format >> 8) & 0xff,
764 (p->pixel_format >> 16) & 0xff,
765 (p->pixel_format >> 24) & 0xff,
766 p->type);
767 switch (p->type) {
768 case V4L2_FRMSIZE_TYPE_DISCRETE:
769 pr_cont(", wxh=%ux%u\n",
770 p->discrete.width, p->discrete.height);
771 break;
772 case V4L2_FRMSIZE_TYPE_STEPWISE:
773 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
774 p->stepwise.min_width,
775 p->stepwise.min_height,
776 p->stepwise.max_width,
777 p->stepwise.max_height,
778 p->stepwise.step_width,
779 p->stepwise.step_height);
780 break;
781 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
782 /* fall through */
783 default:
784 pr_cont("\n");
785 break;
786 }
787 }
788
789 static void v4l_print_frmivalenum(const void *arg, bool write_only)
790 {
791 const struct v4l2_frmivalenum *p = arg;
792
793 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
794 p->index,
795 (p->pixel_format & 0xff),
796 (p->pixel_format >> 8) & 0xff,
797 (p->pixel_format >> 16) & 0xff,
798 (p->pixel_format >> 24) & 0xff,
799 p->width, p->height, p->type);
800 switch (p->type) {
801 case V4L2_FRMIVAL_TYPE_DISCRETE:
802 pr_cont(", fps=%d/%d\n",
803 p->discrete.numerator,
804 p->discrete.denominator);
805 break;
806 case V4L2_FRMIVAL_TYPE_STEPWISE:
807 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
808 p->stepwise.min.numerator,
809 p->stepwise.min.denominator,
810 p->stepwise.max.numerator,
811 p->stepwise.max.denominator,
812 p->stepwise.step.numerator,
813 p->stepwise.step.denominator);
814 break;
815 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
816 /* fall through */
817 default:
818 pr_cont("\n");
819 break;
820 }
821 }
822
823 static void v4l_print_event(const void *arg, bool write_only)
824 {
825 const struct v4l2_event *p = arg;
826 const struct v4l2_event_ctrl *c;
827
828 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
829 p->type, p->pending, p->sequence, p->id,
830 p->timestamp.tv_sec, p->timestamp.tv_nsec);
831 switch (p->type) {
832 case V4L2_EVENT_VSYNC:
833 printk(KERN_DEBUG "field=%s\n",
834 prt_names(p->u.vsync.field, v4l2_field_names));
835 break;
836 case V4L2_EVENT_CTRL:
837 c = &p->u.ctrl;
838 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
839 c->changes, c->type);
840 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
841 pr_cont("value64=%lld, ", c->value64);
842 else
843 pr_cont("value=%d, ", c->value);
844 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
845 c->flags, c->minimum, c->maximum,
846 c->step, c->default_value);
847 break;
848 case V4L2_EVENT_FRAME_SYNC:
849 pr_cont("frame_sequence=%u\n",
850 p->u.frame_sync.frame_sequence);
851 break;
852 }
853 }
854
855 static void v4l_print_event_subscription(const void *arg, bool write_only)
856 {
857 const struct v4l2_event_subscription *p = arg;
858
859 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
860 p->type, p->id, p->flags);
861 }
862
863 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
864 {
865 const struct v4l2_sliced_vbi_cap *p = arg;
866 int i;
867
868 pr_cont("type=%s, service_set=0x%08x\n",
869 prt_names(p->type, v4l2_type_names), p->service_set);
870 for (i = 0; i < 24; i++)
871 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
872 p->service_lines[0][i],
873 p->service_lines[1][i]);
874 }
875
876 static void v4l_print_freq_band(const void *arg, bool write_only)
877 {
878 const struct v4l2_frequency_band *p = arg;
879
880 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
881 p->tuner, p->type, p->index,
882 p->capability, p->rangelow,
883 p->rangehigh, p->modulation);
884 }
885
886 static void v4l_print_edid(const void *arg, bool write_only)
887 {
888 const struct v4l2_edid *p = arg;
889
890 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
891 p->pad, p->start_block, p->blocks);
892 }
893
894 static void v4l_print_u32(const void *arg, bool write_only)
895 {
896 pr_cont("value=%u\n", *(const u32 *)arg);
897 }
898
899 static void v4l_print_newline(const void *arg, bool write_only)
900 {
901 pr_cont("\n");
902 }
903
904 static void v4l_print_default(const void *arg, bool write_only)
905 {
906 pr_cont("driver-specific ioctl\n");
907 }
908
909 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
910 {
911 __u32 i;
912
913 /* zero the reserved fields */
914 c->reserved[0] = 0;
915 for (i = 0; i < c->count; i++)
916 c->controls[i].reserved2[0] = 0;
917
918 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
919 when using extended controls.
920 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
921 is it allowed for backwards compatibility.
922 */
923 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
924 return 0;
925 if (!c->which)
926 return 1;
927 /* Check that all controls are from the same control class. */
928 for (i = 0; i < c->count; i++) {
929 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
930 c->error_idx = i;
931 return 0;
932 }
933 }
934 return 1;
935 }
936
937 static int check_fmt(struct file *file, enum v4l2_buf_type type)
938 {
939 struct video_device *vfd = video_devdata(file);
940 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
941 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
942 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
943 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
944 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
945 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
946 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
947
948 if (ops == NULL)
949 return -EINVAL;
950
951 switch (type) {
952 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
953 if ((is_vid || is_tch) && is_rx &&
954 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
955 return 0;
956 break;
957 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
958 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
959 return 0;
960 break;
961 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
962 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
963 return 0;
964 break;
965 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
966 if (is_vid && is_tx &&
967 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
968 return 0;
969 break;
970 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
971 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
972 return 0;
973 break;
974 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
975 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
976 return 0;
977 break;
978 case V4L2_BUF_TYPE_VBI_CAPTURE:
979 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
980 return 0;
981 break;
982 case V4L2_BUF_TYPE_VBI_OUTPUT:
983 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
984 return 0;
985 break;
986 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
987 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
988 return 0;
989 break;
990 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
991 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
992 return 0;
993 break;
994 case V4L2_BUF_TYPE_SDR_CAPTURE:
995 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
996 return 0;
997 break;
998 case V4L2_BUF_TYPE_SDR_OUTPUT:
999 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
1000 return 0;
1001 break;
1002 case V4L2_BUF_TYPE_META_CAPTURE:
1003 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
1004 return 0;
1005 break;
1006 case V4L2_BUF_TYPE_META_OUTPUT:
1007 if (is_vid && is_tx && ops->vidioc_g_fmt_meta_out)
1008 return 0;
1009 break;
1010 default:
1011 break;
1012 }
1013 return -EINVAL;
1014 }
1015
1016 static void v4l_sanitize_format(struct v4l2_format *fmt)
1017 {
1018 unsigned int offset;
1019
1020 /*
1021 * The v4l2_pix_format structure has been extended with fields that were
1022 * not previously required to be set to zero by applications. The priv
1023 * field, when set to a magic value, indicates the the extended fields
1024 * are valid. Otherwise they will contain undefined values. To simplify
1025 * the API towards drivers zero the extended fields and set the priv
1026 * field to the magic value when the extended pixel format structure
1027 * isn't used by applications.
1028 */
1029
1030 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1031 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1032 return;
1033
1034 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1035 return;
1036
1037 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1038
1039 offset = offsetof(struct v4l2_pix_format, priv)
1040 + sizeof(fmt->fmt.pix.priv);
1041 memset(((void *)&fmt->fmt.pix) + offset, 0,
1042 sizeof(fmt->fmt.pix) - offset);
1043 }
1044
1045 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1046 struct file *file, void *fh, void *arg)
1047 {
1048 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1049 struct video_device *vfd = video_devdata(file);
1050 int ret;
1051
1052 cap->version = LINUX_VERSION_CODE;
1053 cap->device_caps = vfd->device_caps;
1054 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1055
1056 ret = ops->vidioc_querycap(file, fh, cap);
1057
1058 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1059 /*
1060 * Drivers MUST fill in device_caps, so check for this and
1061 * warn if it was forgotten.
1062 */
1063 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1064 !cap->device_caps, "Bad caps for driver %s, %x %x",
1065 cap->driver, cap->capabilities, cap->device_caps);
1066 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1067
1068 return ret;
1069 }
1070
1071 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1072 struct file *file, void *fh, void *arg)
1073 {
1074 struct video_device *vfd = video_devdata(file);
1075 int ret;
1076
1077 ret = v4l_enable_media_source(vfd);
1078 if (ret)
1079 return ret;
1080 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1081 }
1082
1083 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1084 struct file *file, void *fh, void *arg)
1085 {
1086 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1087 }
1088
1089 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1090 struct file *file, void *fh, void *arg)
1091 {
1092 struct video_device *vfd;
1093 u32 *p = arg;
1094
1095 vfd = video_devdata(file);
1096 *p = v4l2_prio_max(vfd->prio);
1097 return 0;
1098 }
1099
1100 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1101 struct file *file, void *fh, void *arg)
1102 {
1103 struct video_device *vfd;
1104 struct v4l2_fh *vfh;
1105 u32 *p = arg;
1106
1107 vfd = video_devdata(file);
1108 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1109 return -ENOTTY;
1110 vfh = file->private_data;
1111 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1112 }
1113
1114 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1115 struct file *file, void *fh, void *arg)
1116 {
1117 struct video_device *vfd = video_devdata(file);
1118 struct v4l2_input *p = arg;
1119
1120 /*
1121 * We set the flags for CAP_DV_TIMINGS &
1122 * CAP_STD here based on ioctl handler provided by the
1123 * driver. If the driver doesn't support these
1124 * for a specific input, it must override these flags.
1125 */
1126 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1127 p->capabilities |= V4L2_IN_CAP_STD;
1128
1129 return ops->vidioc_enum_input(file, fh, p);
1130 }
1131
1132 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1133 struct file *file, void *fh, void *arg)
1134 {
1135 struct video_device *vfd = video_devdata(file);
1136 struct v4l2_output *p = arg;
1137
1138 /*
1139 * We set the flags for CAP_DV_TIMINGS &
1140 * CAP_STD here based on ioctl handler provided by the
1141 * driver. If the driver doesn't support these
1142 * for a specific output, it must override these flags.
1143 */
1144 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1145 p->capabilities |= V4L2_OUT_CAP_STD;
1146
1147 return ops->vidioc_enum_output(file, fh, p);
1148 }
1149
1150 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1151 {
1152 const unsigned sz = sizeof(fmt->description);
1153 const char *descr = NULL;
1154 u32 flags = 0;
1155
1156 /*
1157 * We depart from the normal coding style here since the descriptions
1158 * should be aligned so it is easy to see which descriptions will be
1159 * longer than 31 characters (the max length for a description).
1160 * And frankly, this is easier to read anyway.
1161 *
1162 * Note that gcc will use O(log N) comparisons to find the right case.
1163 */
1164 switch (fmt->pixelformat) {
1165 /* Max description length mask: descr = "0123456789012345678901234567890" */
1166 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1167 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1168 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1169 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1170 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1171 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1172 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1173 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1174 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1175 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1176 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1177 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1178 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1179 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1180 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1181 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1182 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1183 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1184 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1185 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1186 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1187 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1188 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1189 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1190 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1191 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1192 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1193 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1194 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1195 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
1196 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1197 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1198 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1199 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
1200 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
1201 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1202 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1203 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1204 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1205 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1206 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1207 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1208 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1209 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1210 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1211 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1212 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1213 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1214 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1215 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1216 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1217 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1218 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1219 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1220 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1221 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1222 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1223 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1224 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1225 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1226 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1227 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1228 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1229 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1230 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1231 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1232 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1233 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1234 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1235 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1236 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1237 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1238 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1239 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1240 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1241 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1242 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1243 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1244 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1245 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1246 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1247 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1248 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1249 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1250 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1251 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1252 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1253 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1254 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1255 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1256 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1257 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1258 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1259 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1260 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1261 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1262 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1263 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1264 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1265 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1266 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1267 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1268 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1269 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1270 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1271 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1272 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1273 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1274 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1275 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1276 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1277 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1278 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1279 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1280 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1281 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1282 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1283 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1284 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1285 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1286 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1287 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1288 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1289 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1290 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1291 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1292 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1293 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1294 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1295 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
1296 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
1297 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
1298 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break;
1299 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break;
1300 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break;
1301 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break;
1302 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
1303 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
1304 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break;
1305
1306 default:
1307 /* Compressed formats */
1308 flags = V4L2_FMT_FLAG_COMPRESSED;
1309 switch (fmt->pixelformat) {
1310 /* Max description length mask: descr = "0123456789012345678901234567890" */
1311 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1312 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1313 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1314 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1315 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1316 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1317 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1318 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1319 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1320 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1321 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break;
1322 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break;
1323 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1324 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1325 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1326 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1327 case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1328 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
1329 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
1330 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1331 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1332 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1333 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1334 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1335 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1336 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1337 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1338 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1339 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1340 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1341 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1342 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1343 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1344 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1345 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1346 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1347 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1348 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1349 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1350 default:
1351 if (fmt->description[0])
1352 return;
1353 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1354 flags = 0;
1355 snprintf(fmt->description, sz, "%c%c%c%c%s",
1356 (char)(fmt->pixelformat & 0x7f),
1357 (char)((fmt->pixelformat >> 8) & 0x7f),
1358 (char)((fmt->pixelformat >> 16) & 0x7f),
1359 (char)((fmt->pixelformat >> 24) & 0x7f),
1360 (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1361 break;
1362 }
1363 }
1364
1365 if (descr)
1366 WARN_ON(strscpy(fmt->description, descr, sz) >= sz);
1367 fmt->flags = flags;
1368 }
1369
1370 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1371 struct file *file, void *fh, void *arg)
1372 {
1373 struct v4l2_fmtdesc *p = arg;
1374 int ret = check_fmt(file, p->type);
1375
1376 if (ret)
1377 return ret;
1378 ret = -EINVAL;
1379
1380 switch (p->type) {
1381 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1382 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1383 break;
1384 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1385 break;
1386 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1387 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1388 break;
1389 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1390 break;
1391 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1392 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1393 break;
1394 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1395 break;
1396 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1397 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1398 break;
1399 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1400 break;
1401 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1402 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1403 break;
1404 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1405 break;
1406 case V4L2_BUF_TYPE_SDR_CAPTURE:
1407 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1408 break;
1409 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1410 break;
1411 case V4L2_BUF_TYPE_SDR_OUTPUT:
1412 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1413 break;
1414 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1415 break;
1416 case V4L2_BUF_TYPE_META_CAPTURE:
1417 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1418 break;
1419 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1420 break;
1421 case V4L2_BUF_TYPE_META_OUTPUT:
1422 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1423 break;
1424 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1425 break;
1426 }
1427 if (ret == 0)
1428 v4l_fill_fmtdesc(p);
1429 return ret;
1430 }
1431
1432 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1433 struct file *file, void *fh, void *arg)
1434 {
1435 struct v4l2_format *p = arg;
1436 int ret = check_fmt(file, p->type);
1437
1438 if (ret)
1439 return ret;
1440
1441 /*
1442 * fmt can't be cleared for these overlay types due to the 'clips'
1443 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1444 * Those are provided by the user. So handle these two overlay types
1445 * first, and then just do a simple memset for the other types.
1446 */
1447 switch (p->type) {
1448 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1449 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1450 struct v4l2_clip __user *clips = p->fmt.win.clips;
1451 u32 clipcount = p->fmt.win.clipcount;
1452 void __user *bitmap = p->fmt.win.bitmap;
1453
1454 memset(&p->fmt, 0, sizeof(p->fmt));
1455 p->fmt.win.clips = clips;
1456 p->fmt.win.clipcount = clipcount;
1457 p->fmt.win.bitmap = bitmap;
1458 break;
1459 }
1460 default:
1461 memset(&p->fmt, 0, sizeof(p->fmt));
1462 break;
1463 }
1464
1465 switch (p->type) {
1466 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1467 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1468 break;
1469 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1470 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1471 /* just in case the driver zeroed it again */
1472 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1473 return ret;
1474 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1475 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1476 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1477 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1478 case V4L2_BUF_TYPE_VBI_CAPTURE:
1479 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1480 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1481 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1482 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1483 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1484 break;
1485 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1486 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1487 /* just in case the driver zeroed it again */
1488 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1489 return ret;
1490 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1491 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1492 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1493 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1494 case V4L2_BUF_TYPE_VBI_OUTPUT:
1495 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1496 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1497 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1498 case V4L2_BUF_TYPE_SDR_CAPTURE:
1499 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1500 case V4L2_BUF_TYPE_SDR_OUTPUT:
1501 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1502 case V4L2_BUF_TYPE_META_CAPTURE:
1503 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1504 case V4L2_BUF_TYPE_META_OUTPUT:
1505 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1506 }
1507 return -EINVAL;
1508 }
1509
1510 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1511 {
1512 /*
1513 * The v4l2_pix_format structure contains fields that make no sense for
1514 * touch. Set them to default values in this case.
1515 */
1516
1517 p->field = V4L2_FIELD_NONE;
1518 p->colorspace = V4L2_COLORSPACE_RAW;
1519 p->flags = 0;
1520 p->ycbcr_enc = 0;
1521 p->quantization = 0;
1522 p->xfer_func = 0;
1523 }
1524
1525 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1526 struct file *file, void *fh, void *arg)
1527 {
1528 struct v4l2_format *p = arg;
1529 struct video_device *vfd = video_devdata(file);
1530 int ret = check_fmt(file, p->type);
1531 unsigned int i;
1532
1533 if (ret)
1534 return ret;
1535
1536 ret = v4l_enable_media_source(vfd);
1537 if (ret)
1538 return ret;
1539 v4l_sanitize_format(p);
1540
1541 switch (p->type) {
1542 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1543 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1544 break;
1545 CLEAR_AFTER_FIELD(p, fmt.pix);
1546 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1547 /* just in case the driver zeroed it again */
1548 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1549 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1550 v4l_pix_format_touch(&p->fmt.pix);
1551 return ret;
1552 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1553 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1554 break;
1555 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1556 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES)
1557 break;
1558 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1559 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1560 bytesperline);
1561 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1562 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1563 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1564 break;
1565 CLEAR_AFTER_FIELD(p, fmt.win);
1566 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1567 case V4L2_BUF_TYPE_VBI_CAPTURE:
1568 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1569 break;
1570 CLEAR_AFTER_FIELD(p, fmt.vbi);
1571 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1572 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1573 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1574 break;
1575 CLEAR_AFTER_FIELD(p, fmt.sliced);
1576 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1577 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1578 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1579 break;
1580 CLEAR_AFTER_FIELD(p, fmt.pix);
1581 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1582 /* just in case the driver zeroed it again */
1583 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1584 return ret;
1585 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1586 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1587 break;
1588 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1589 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES)
1590 break;
1591 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1592 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1593 bytesperline);
1594 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1595 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1596 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1597 break;
1598 CLEAR_AFTER_FIELD(p, fmt.win);
1599 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1600 case V4L2_BUF_TYPE_VBI_OUTPUT:
1601 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1602 break;
1603 CLEAR_AFTER_FIELD(p, fmt.vbi);
1604 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1605 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1606 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1607 break;
1608 CLEAR_AFTER_FIELD(p, fmt.sliced);
1609 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1610 case V4L2_BUF_TYPE_SDR_CAPTURE:
1611 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1612 break;
1613 CLEAR_AFTER_FIELD(p, fmt.sdr);
1614 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1615 case V4L2_BUF_TYPE_SDR_OUTPUT:
1616 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1617 break;
1618 CLEAR_AFTER_FIELD(p, fmt.sdr);
1619 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1620 case V4L2_BUF_TYPE_META_CAPTURE:
1621 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1622 break;
1623 CLEAR_AFTER_FIELD(p, fmt.meta);
1624 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1625 case V4L2_BUF_TYPE_META_OUTPUT:
1626 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1627 break;
1628 CLEAR_AFTER_FIELD(p, fmt.meta);
1629 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1630 }
1631 return -EINVAL;
1632 }
1633
1634 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1635 struct file *file, void *fh, void *arg)
1636 {
1637 struct v4l2_format *p = arg;
1638 int ret = check_fmt(file, p->type);
1639 unsigned int i;
1640
1641 if (ret)
1642 return ret;
1643
1644 v4l_sanitize_format(p);
1645
1646 switch (p->type) {
1647 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1648 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1649 break;
1650 CLEAR_AFTER_FIELD(p, fmt.pix);
1651 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1652 /* just in case the driver zeroed it again */
1653 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1654 return ret;
1655 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1656 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1657 break;
1658 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1659 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES)
1660 break;
1661 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1662 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1663 bytesperline);
1664 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1665 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1666 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1667 break;
1668 CLEAR_AFTER_FIELD(p, fmt.win);
1669 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1670 case V4L2_BUF_TYPE_VBI_CAPTURE:
1671 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1672 break;
1673 CLEAR_AFTER_FIELD(p, fmt.vbi);
1674 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1675 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1676 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1677 break;
1678 CLEAR_AFTER_FIELD(p, fmt.sliced);
1679 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1680 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1681 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1682 break;
1683 CLEAR_AFTER_FIELD(p, fmt.pix);
1684 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1685 /* just in case the driver zeroed it again */
1686 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1687 return ret;
1688 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1689 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1690 break;
1691 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1692 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES)
1693 break;
1694 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1695 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1696 bytesperline);
1697 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1698 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1699 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1700 break;
1701 CLEAR_AFTER_FIELD(p, fmt.win);
1702 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1703 case V4L2_BUF_TYPE_VBI_OUTPUT:
1704 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1705 break;
1706 CLEAR_AFTER_FIELD(p, fmt.vbi);
1707 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1708 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1709 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1710 break;
1711 CLEAR_AFTER_FIELD(p, fmt.sliced);
1712 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1713 case V4L2_BUF_TYPE_SDR_CAPTURE:
1714 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1715 break;
1716 CLEAR_AFTER_FIELD(p, fmt.sdr);
1717 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1718 case V4L2_BUF_TYPE_SDR_OUTPUT:
1719 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1720 break;
1721 CLEAR_AFTER_FIELD(p, fmt.sdr);
1722 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1723 case V4L2_BUF_TYPE_META_CAPTURE:
1724 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1725 break;
1726 CLEAR_AFTER_FIELD(p, fmt.meta);
1727 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1728 case V4L2_BUF_TYPE_META_OUTPUT:
1729 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1730 break;
1731 CLEAR_AFTER_FIELD(p, fmt.meta);
1732 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1733 }
1734 return -EINVAL;
1735 }
1736
1737 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1738 struct file *file, void *fh, void *arg)
1739 {
1740 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1741 }
1742
1743 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1744 struct file *file, void *fh, void *arg)
1745 {
1746 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1747 }
1748
1749 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1750 struct file *file, void *fh, void *arg)
1751 {
1752 struct video_device *vfd = video_devdata(file);
1753 struct v4l2_tuner *p = arg;
1754 int err;
1755
1756 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1757 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1758 err = ops->vidioc_g_tuner(file, fh, p);
1759 if (!err)
1760 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1761 return err;
1762 }
1763
1764 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1765 struct file *file, void *fh, void *arg)
1766 {
1767 struct video_device *vfd = video_devdata(file);
1768 struct v4l2_tuner *p = arg;
1769 int ret;
1770
1771 ret = v4l_enable_media_source(vfd);
1772 if (ret)
1773 return ret;
1774 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1775 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1776 return ops->vidioc_s_tuner(file, fh, p);
1777 }
1778
1779 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1780 struct file *file, void *fh, void *arg)
1781 {
1782 struct video_device *vfd = video_devdata(file);
1783 struct v4l2_modulator *p = arg;
1784 int err;
1785
1786 if (vfd->vfl_type == VFL_TYPE_RADIO)
1787 p->type = V4L2_TUNER_RADIO;
1788
1789 err = ops->vidioc_g_modulator(file, fh, p);
1790 if (!err)
1791 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1792 return err;
1793 }
1794
1795 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1796 struct file *file, void *fh, void *arg)
1797 {
1798 struct video_device *vfd = video_devdata(file);
1799 struct v4l2_modulator *p = arg;
1800
1801 if (vfd->vfl_type == VFL_TYPE_RADIO)
1802 p->type = V4L2_TUNER_RADIO;
1803
1804 return ops->vidioc_s_modulator(file, fh, p);
1805 }
1806
1807 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1808 struct file *file, void *fh, void *arg)
1809 {
1810 struct video_device *vfd = video_devdata(file);
1811 struct v4l2_frequency *p = arg;
1812
1813 if (vfd->vfl_type == VFL_TYPE_SDR)
1814 p->type = V4L2_TUNER_SDR;
1815 else
1816 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1817 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1818 return ops->vidioc_g_frequency(file, fh, p);
1819 }
1820
1821 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1822 struct file *file, void *fh, void *arg)
1823 {
1824 struct video_device *vfd = video_devdata(file);
1825 const struct v4l2_frequency *p = arg;
1826 enum v4l2_tuner_type type;
1827 int ret;
1828
1829 ret = v4l_enable_media_source(vfd);
1830 if (ret)
1831 return ret;
1832 if (vfd->vfl_type == VFL_TYPE_SDR) {
1833 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1834 return -EINVAL;
1835 } else {
1836 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1837 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1838 if (type != p->type)
1839 return -EINVAL;
1840 }
1841 return ops->vidioc_s_frequency(file, fh, p);
1842 }
1843
1844 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1845 struct file *file, void *fh, void *arg)
1846 {
1847 struct video_device *vfd = video_devdata(file);
1848 struct v4l2_standard *p = arg;
1849
1850 return v4l_video_std_enumstd(p, vfd->tvnorms);
1851 }
1852
1853 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1854 struct file *file, void *fh, void *arg)
1855 {
1856 struct video_device *vfd = video_devdata(file);
1857 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1858 int ret;
1859
1860 ret = v4l_enable_media_source(vfd);
1861 if (ret)
1862 return ret;
1863 norm = id & vfd->tvnorms;
1864 if (vfd->tvnorms && !norm) /* Check if std is supported */
1865 return -EINVAL;
1866
1867 /* Calls the specific handler */
1868 return ops->vidioc_s_std(file, fh, norm);
1869 }
1870
1871 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1872 struct file *file, void *fh, void *arg)
1873 {
1874 struct video_device *vfd = video_devdata(file);
1875 v4l2_std_id *p = arg;
1876 int ret;
1877
1878 ret = v4l_enable_media_source(vfd);
1879 if (ret)
1880 return ret;
1881 /*
1882 * If no signal is detected, then the driver should return
1883 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1884 * any standards that do not apply removed.
1885 *
1886 * This means that tuners, audio and video decoders can join
1887 * their efforts to improve the standards detection.
1888 */
1889 *p = vfd->tvnorms;
1890 return ops->vidioc_querystd(file, fh, arg);
1891 }
1892
1893 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1894 struct file *file, void *fh, void *arg)
1895 {
1896 struct video_device *vfd = video_devdata(file);
1897 struct v4l2_hw_freq_seek *p = arg;
1898 enum v4l2_tuner_type type;
1899 int ret;
1900
1901 ret = v4l_enable_media_source(vfd);
1902 if (ret)
1903 return ret;
1904 /* s_hw_freq_seek is not supported for SDR for now */
1905 if (vfd->vfl_type == VFL_TYPE_SDR)
1906 return -EINVAL;
1907
1908 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1909 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1910 if (p->type != type)
1911 return -EINVAL;
1912 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1913 }
1914
1915 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1916 struct file *file, void *fh, void *arg)
1917 {
1918 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1919 }
1920
1921 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1922 struct file *file, void *fh, void *arg)
1923 {
1924 struct v4l2_requestbuffers *p = arg;
1925 int ret = check_fmt(file, p->type);
1926
1927 if (ret)
1928 return ret;
1929
1930 CLEAR_AFTER_FIELD(p, capabilities);
1931
1932 return ops->vidioc_reqbufs(file, fh, p);
1933 }
1934
1935 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1936 struct file *file, void *fh, void *arg)
1937 {
1938 struct v4l2_buffer *p = arg;
1939 int ret = check_fmt(file, p->type);
1940
1941 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1942 }
1943
1944 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1945 struct file *file, void *fh, void *arg)
1946 {
1947 struct v4l2_buffer *p = arg;
1948 int ret = check_fmt(file, p->type);
1949
1950 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1951 }
1952
1953 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1954 struct file *file, void *fh, void *arg)
1955 {
1956 struct v4l2_buffer *p = arg;
1957 int ret = check_fmt(file, p->type);
1958
1959 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1960 }
1961
1962 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1963 struct file *file, void *fh, void *arg)
1964 {
1965 struct v4l2_create_buffers *create = arg;
1966 int ret = check_fmt(file, create->format.type);
1967
1968 if (ret)
1969 return ret;
1970
1971 CLEAR_AFTER_FIELD(create, capabilities);
1972
1973 v4l_sanitize_format(&create->format);
1974
1975 ret = ops->vidioc_create_bufs(file, fh, create);
1976
1977 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1978 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1979 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1980
1981 return ret;
1982 }
1983
1984 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1985 struct file *file, void *fh, void *arg)
1986 {
1987 struct v4l2_buffer *b = arg;
1988 int ret = check_fmt(file, b->type);
1989
1990 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1991 }
1992
1993 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1994 struct file *file, void *fh, void *arg)
1995 {
1996 struct v4l2_streamparm *p = arg;
1997 v4l2_std_id std;
1998 int ret = check_fmt(file, p->type);
1999
2000 if (ret)
2001 return ret;
2002 if (ops->vidioc_g_parm)
2003 return ops->vidioc_g_parm(file, fh, p);
2004 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2005 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2006 return -EINVAL;
2007 p->parm.capture.readbuffers = 2;
2008 ret = ops->vidioc_g_std(file, fh, &std);
2009 if (ret == 0)
2010 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2011 return ret;
2012 }
2013
2014 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2015 struct file *file, void *fh, void *arg)
2016 {
2017 struct v4l2_streamparm *p = arg;
2018 int ret = check_fmt(file, p->type);
2019
2020 if (ret)
2021 return ret;
2022
2023 /* Note: extendedmode is never used in drivers */
2024 if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2025 memset(p->parm.output.reserved, 0,
2026 sizeof(p->parm.output.reserved));
2027 p->parm.output.extendedmode = 0;
2028 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2029 } else {
2030 memset(p->parm.capture.reserved, 0,
2031 sizeof(p->parm.capture.reserved));
2032 p->parm.capture.extendedmode = 0;
2033 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2034 }
2035 return ops->vidioc_s_parm(file, fh, p);
2036 }
2037
2038 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2039 struct file *file, void *fh, void *arg)
2040 {
2041 struct video_device *vfd = video_devdata(file);
2042 struct v4l2_queryctrl *p = arg;
2043 struct v4l2_fh *vfh =
2044 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2045
2046 if (vfh && vfh->ctrl_handler)
2047 return v4l2_queryctrl(vfh->ctrl_handler, p);
2048 if (vfd->ctrl_handler)
2049 return v4l2_queryctrl(vfd->ctrl_handler, p);
2050 if (ops->vidioc_queryctrl)
2051 return ops->vidioc_queryctrl(file, fh, p);
2052 return -ENOTTY;
2053 }
2054
2055 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2056 struct file *file, void *fh, void *arg)
2057 {
2058 struct video_device *vfd = video_devdata(file);
2059 struct v4l2_query_ext_ctrl *p = arg;
2060 struct v4l2_fh *vfh =
2061 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2062
2063 if (vfh && vfh->ctrl_handler)
2064 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2065 if (vfd->ctrl_handler)
2066 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2067 if (ops->vidioc_query_ext_ctrl)
2068 return ops->vidioc_query_ext_ctrl(file, fh, p);
2069 return -ENOTTY;
2070 }
2071
2072 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2073 struct file *file, void *fh, void *arg)
2074 {
2075 struct video_device *vfd = video_devdata(file);
2076 struct v4l2_querymenu *p = arg;
2077 struct v4l2_fh *vfh =
2078 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2079
2080 if (vfh && vfh->ctrl_handler)
2081 return v4l2_querymenu(vfh->ctrl_handler, p);
2082 if (vfd->ctrl_handler)
2083 return v4l2_querymenu(vfd->ctrl_handler, p);
2084 if (ops->vidioc_querymenu)
2085 return ops->vidioc_querymenu(file, fh, p);
2086 return -ENOTTY;
2087 }
2088
2089 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2090 struct file *file, void *fh, void *arg)
2091 {
2092 struct video_device *vfd = video_devdata(file);
2093 struct v4l2_control *p = arg;
2094 struct v4l2_fh *vfh =
2095 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2096 struct v4l2_ext_controls ctrls;
2097 struct v4l2_ext_control ctrl;
2098
2099 if (vfh && vfh->ctrl_handler)
2100 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2101 if (vfd->ctrl_handler)
2102 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2103 if (ops->vidioc_g_ctrl)
2104 return ops->vidioc_g_ctrl(file, fh, p);
2105 if (ops->vidioc_g_ext_ctrls == NULL)
2106 return -ENOTTY;
2107
2108 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2109 ctrls.count = 1;
2110 ctrls.controls = &ctrl;
2111 ctrl.id = p->id;
2112 ctrl.value = p->value;
2113 if (check_ext_ctrls(&ctrls, 1)) {
2114 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2115
2116 if (ret == 0)
2117 p->value = ctrl.value;
2118 return ret;
2119 }
2120 return -EINVAL;
2121 }
2122
2123 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2124 struct file *file, void *fh, void *arg)
2125 {
2126 struct video_device *vfd = video_devdata(file);
2127 struct v4l2_control *p = arg;
2128 struct v4l2_fh *vfh =
2129 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2130 struct v4l2_ext_controls ctrls;
2131 struct v4l2_ext_control ctrl;
2132
2133 if (vfh && vfh->ctrl_handler)
2134 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2135 if (vfd->ctrl_handler)
2136 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2137 if (ops->vidioc_s_ctrl)
2138 return ops->vidioc_s_ctrl(file, fh, p);
2139 if (ops->vidioc_s_ext_ctrls == NULL)
2140 return -ENOTTY;
2141
2142 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2143 ctrls.count = 1;
2144 ctrls.controls = &ctrl;
2145 ctrl.id = p->id;
2146 ctrl.value = p->value;
2147 if (check_ext_ctrls(&ctrls, 1))
2148 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2149 return -EINVAL;
2150 }
2151
2152 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2153 struct file *file, void *fh, void *arg)
2154 {
2155 struct video_device *vfd = video_devdata(file);
2156 struct v4l2_ext_controls *p = arg;
2157 struct v4l2_fh *vfh =
2158 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2159
2160 p->error_idx = p->count;
2161 if (vfh && vfh->ctrl_handler)
2162 return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
2163 if (vfd->ctrl_handler)
2164 return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
2165 if (ops->vidioc_g_ext_ctrls == NULL)
2166 return -ENOTTY;
2167 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2168 -EINVAL;
2169 }
2170
2171 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2172 struct file *file, void *fh, void *arg)
2173 {
2174 struct video_device *vfd = video_devdata(file);
2175 struct v4l2_ext_controls *p = arg;
2176 struct v4l2_fh *vfh =
2177 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2178
2179 p->error_idx = p->count;
2180 if (vfh && vfh->ctrl_handler)
2181 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
2182 if (vfd->ctrl_handler)
2183 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
2184 if (ops->vidioc_s_ext_ctrls == NULL)
2185 return -ENOTTY;
2186 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2187 -EINVAL;
2188 }
2189
2190 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2191 struct file *file, void *fh, void *arg)
2192 {
2193 struct video_device *vfd = video_devdata(file);
2194 struct v4l2_ext_controls *p = arg;
2195 struct v4l2_fh *vfh =
2196 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2197
2198 p->error_idx = p->count;
2199 if (vfh && vfh->ctrl_handler)
2200 return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
2201 if (vfd->ctrl_handler)
2202 return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
2203 if (ops->vidioc_try_ext_ctrls == NULL)
2204 return -ENOTTY;
2205 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2206 -EINVAL;
2207 }
2208
2209 /*
2210 * The selection API specified originally that the _MPLANE buffer types
2211 * shouldn't be used. The reasons for this are lost in the mists of time
2212 * (or just really crappy memories). Regardless, this is really annoying
2213 * for userspace. So to keep things simple we map _MPLANE buffer types
2214 * to their 'regular' counterparts before calling the driver. And we
2215 * restore it afterwards. This way applications can use either buffer
2216 * type and drivers don't need to check for both.
2217 */
2218 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2219 struct file *file, void *fh, void *arg)
2220 {
2221 struct v4l2_selection *p = arg;
2222 u32 old_type = p->type;
2223 int ret;
2224
2225 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2226 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2227 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2228 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2229 ret = ops->vidioc_g_selection(file, fh, p);
2230 p->type = old_type;
2231 return ret;
2232 }
2233
2234 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2235 struct file *file, void *fh, void *arg)
2236 {
2237 struct v4l2_selection *p = arg;
2238 u32 old_type = p->type;
2239 int ret;
2240
2241 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2242 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2243 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2244 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2245 ret = ops->vidioc_s_selection(file, fh, p);
2246 p->type = old_type;
2247 return ret;
2248 }
2249
2250 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2251 struct file *file, void *fh, void *arg)
2252 {
2253 struct video_device *vfd = video_devdata(file);
2254 struct v4l2_crop *p = arg;
2255 struct v4l2_selection s = {
2256 .type = p->type,
2257 };
2258 int ret;
2259
2260 /* simulate capture crop using selection api */
2261
2262 /* crop means compose for output devices */
2263 if (V4L2_TYPE_IS_OUTPUT(p->type))
2264 s.target = V4L2_SEL_TGT_COMPOSE;
2265 else
2266 s.target = V4L2_SEL_TGT_CROP;
2267
2268 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2269 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2270 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2271
2272 ret = v4l_g_selection(ops, file, fh, &s);
2273
2274 /* copying results to old structure on success */
2275 if (!ret)
2276 p->c = s.r;
2277 return ret;
2278 }
2279
2280 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2281 struct file *file, void *fh, void *arg)
2282 {
2283 struct video_device *vfd = video_devdata(file);
2284 struct v4l2_crop *p = arg;
2285 struct v4l2_selection s = {
2286 .type = p->type,
2287 .r = p->c,
2288 };
2289
2290 /* simulate capture crop using selection api */
2291
2292 /* crop means compose for output devices */
2293 if (V4L2_TYPE_IS_OUTPUT(p->type))
2294 s.target = V4L2_SEL_TGT_COMPOSE;
2295 else
2296 s.target = V4L2_SEL_TGT_CROP;
2297
2298 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2299 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2300 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2301
2302 return v4l_s_selection(ops, file, fh, &s);
2303 }
2304
2305 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2306 struct file *file, void *fh, void *arg)
2307 {
2308 struct video_device *vfd = video_devdata(file);
2309 struct v4l2_cropcap *p = arg;
2310 struct v4l2_selection s = { .type = p->type };
2311 int ret = 0;
2312
2313 /* setting trivial pixelaspect */
2314 p->pixelaspect.numerator = 1;
2315 p->pixelaspect.denominator = 1;
2316
2317 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2318 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2319 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2320 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2321
2322 /*
2323 * The determine_valid_ioctls() call already should ensure
2324 * that this can never happen, but just in case...
2325 */
2326 if (WARN_ON(!ops->vidioc_g_selection))
2327 return -ENOTTY;
2328
2329 if (ops->vidioc_g_pixelaspect)
2330 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2331 &p->pixelaspect);
2332
2333 /*
2334 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2335 * square pixel aspect ratio in that case.
2336 */
2337 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2338 return ret;
2339
2340 /* Use g_selection() to fill in the bounds and defrect rectangles */
2341
2342 /* obtaining bounds */
2343 if (V4L2_TYPE_IS_OUTPUT(p->type))
2344 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2345 else
2346 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2347
2348 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2349 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2350 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2351
2352 ret = v4l_g_selection(ops, file, fh, &s);
2353 if (ret)
2354 return ret;
2355 p->bounds = s.r;
2356
2357 /* obtaining defrect */
2358 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2359 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2360 else
2361 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2362
2363 ret = v4l_g_selection(ops, file, fh, &s);
2364 if (ret)
2365 return ret;
2366 p->defrect = s.r;
2367
2368 return 0;
2369 }
2370
2371 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2372 struct file *file, void *fh, void *arg)
2373 {
2374 struct video_device *vfd = video_devdata(file);
2375 int ret;
2376
2377 if (vfd->v4l2_dev)
2378 pr_info("%s: ================= START STATUS =================\n",
2379 vfd->v4l2_dev->name);
2380 ret = ops->vidioc_log_status(file, fh);
2381 if (vfd->v4l2_dev)
2382 pr_info("%s: ================== END STATUS ==================\n",
2383 vfd->v4l2_dev->name);
2384 return ret;
2385 }
2386
2387 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2388 struct file *file, void *fh, void *arg)
2389 {
2390 #ifdef CONFIG_VIDEO_ADV_DEBUG
2391 struct v4l2_dbg_register *p = arg;
2392 struct video_device *vfd = video_devdata(file);
2393 struct v4l2_subdev *sd;
2394 int idx = 0;
2395
2396 if (!capable(CAP_SYS_ADMIN))
2397 return -EPERM;
2398 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2399 if (vfd->v4l2_dev == NULL)
2400 return -EINVAL;
2401 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2402 if (p->match.addr == idx++)
2403 return v4l2_subdev_call(sd, core, g_register, p);
2404 return -EINVAL;
2405 }
2406 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2407 (ops->vidioc_g_chip_info || p->match.addr == 0))
2408 return ops->vidioc_g_register(file, fh, p);
2409 return -EINVAL;
2410 #else
2411 return -ENOTTY;
2412 #endif
2413 }
2414
2415 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2416 struct file *file, void *fh, void *arg)
2417 {
2418 #ifdef CONFIG_VIDEO_ADV_DEBUG
2419 const struct v4l2_dbg_register *p = arg;
2420 struct video_device *vfd = video_devdata(file);
2421 struct v4l2_subdev *sd;
2422 int idx = 0;
2423
2424 if (!capable(CAP_SYS_ADMIN))
2425 return -EPERM;
2426 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2427 if (vfd->v4l2_dev == NULL)
2428 return -EINVAL;
2429 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2430 if (p->match.addr == idx++)
2431 return v4l2_subdev_call(sd, core, s_register, p);
2432 return -EINVAL;
2433 }
2434 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2435 (ops->vidioc_g_chip_info || p->match.addr == 0))
2436 return ops->vidioc_s_register(file, fh, p);
2437 return -EINVAL;
2438 #else
2439 return -ENOTTY;
2440 #endif
2441 }
2442
2443 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2444 struct file *file, void *fh, void *arg)
2445 {
2446 #ifdef CONFIG_VIDEO_ADV_DEBUG
2447 struct video_device *vfd = video_devdata(file);
2448 struct v4l2_dbg_chip_info *p = arg;
2449 struct v4l2_subdev *sd;
2450 int idx = 0;
2451
2452 switch (p->match.type) {
2453 case V4L2_CHIP_MATCH_BRIDGE:
2454 if (ops->vidioc_s_register)
2455 p->flags |= V4L2_CHIP_FL_WRITABLE;
2456 if (ops->vidioc_g_register)
2457 p->flags |= V4L2_CHIP_FL_READABLE;
2458 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2459 if (ops->vidioc_g_chip_info)
2460 return ops->vidioc_g_chip_info(file, fh, arg);
2461 if (p->match.addr)
2462 return -EINVAL;
2463 return 0;
2464
2465 case V4L2_CHIP_MATCH_SUBDEV:
2466 if (vfd->v4l2_dev == NULL)
2467 break;
2468 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2469 if (p->match.addr != idx++)
2470 continue;
2471 if (sd->ops->core && sd->ops->core->s_register)
2472 p->flags |= V4L2_CHIP_FL_WRITABLE;
2473 if (sd->ops->core && sd->ops->core->g_register)
2474 p->flags |= V4L2_CHIP_FL_READABLE;
2475 strscpy(p->name, sd->name, sizeof(p->name));
2476 return 0;
2477 }
2478 break;
2479 }
2480 return -EINVAL;
2481 #else
2482 return -ENOTTY;
2483 #endif
2484 }
2485
2486 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2487 struct file *file, void *fh, void *arg)
2488 {
2489 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2490 }
2491
2492 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2493 struct file *file, void *fh, void *arg)
2494 {
2495 return ops->vidioc_subscribe_event(fh, arg);
2496 }
2497
2498 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2499 struct file *file, void *fh, void *arg)
2500 {
2501 return ops->vidioc_unsubscribe_event(fh, arg);
2502 }
2503
2504 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2505 struct file *file, void *fh, void *arg)
2506 {
2507 struct v4l2_sliced_vbi_cap *p = arg;
2508 int ret = check_fmt(file, p->type);
2509
2510 if (ret)
2511 return ret;
2512
2513 /* Clear up to type, everything after type is zeroed already */
2514 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2515
2516 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2517 }
2518
2519 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2520 struct file *file, void *fh, void *arg)
2521 {
2522 struct video_device *vfd = video_devdata(file);
2523 struct v4l2_frequency_band *p = arg;
2524 enum v4l2_tuner_type type;
2525 int err;
2526
2527 if (vfd->vfl_type == VFL_TYPE_SDR) {
2528 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2529 return -EINVAL;
2530 type = p->type;
2531 } else {
2532 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2533 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2534 if (type != p->type)
2535 return -EINVAL;
2536 }
2537 if (ops->vidioc_enum_freq_bands) {
2538 err = ops->vidioc_enum_freq_bands(file, fh, p);
2539 if (err != -ENOTTY)
2540 return err;
2541 }
2542 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2543 struct v4l2_tuner t = {
2544 .index = p->tuner,
2545 .type = type,
2546 };
2547
2548 if (p->index)
2549 return -EINVAL;
2550 err = ops->vidioc_g_tuner(file, fh, &t);
2551 if (err)
2552 return err;
2553 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2554 p->rangelow = t.rangelow;
2555 p->rangehigh = t.rangehigh;
2556 p->modulation = (type == V4L2_TUNER_RADIO) ?
2557 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2558 return 0;
2559 }
2560 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2561 struct v4l2_modulator m = {
2562 .index = p->tuner,
2563 };
2564
2565 if (type != V4L2_TUNER_RADIO)
2566 return -EINVAL;
2567 if (p->index)
2568 return -EINVAL;
2569 err = ops->vidioc_g_modulator(file, fh, &m);
2570 if (err)
2571 return err;
2572 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2573 p->rangelow = m.rangelow;
2574 p->rangehigh = m.rangehigh;
2575 p->modulation = (type == V4L2_TUNER_RADIO) ?
2576 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2577 return 0;
2578 }
2579 return -ENOTTY;
2580 }
2581
2582 struct v4l2_ioctl_info {
2583 unsigned int ioctl;
2584 u32 flags;
2585 const char * const name;
2586 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2587 void *fh, void *p);
2588 void (*debug)(const void *arg, bool write_only);
2589 };
2590
2591 /* This control needs a priority check */
2592 #define INFO_FL_PRIO (1 << 0)
2593 /* This control can be valid if the filehandle passes a control handler. */
2594 #define INFO_FL_CTRL (1 << 1)
2595 /* Queuing ioctl */
2596 #define INFO_FL_QUEUE (1 << 2)
2597 /* Always copy back result, even on error */
2598 #define INFO_FL_ALWAYS_COPY (1 << 3)
2599 /* Zero struct from after the field to the end */
2600 #define INFO_FL_CLEAR(v4l2_struct, field) \
2601 ((offsetof(struct v4l2_struct, field) + \
2602 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2603 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2604
2605 #define DEFINE_V4L_STUB_FUNC(_vidioc) \
2606 static int v4l_stub_ ## _vidioc( \
2607 const struct v4l2_ioctl_ops *ops, \
2608 struct file *file, void *fh, void *p) \
2609 { \
2610 return ops->vidioc_ ## _vidioc(file, fh, p); \
2611 }
2612
2613 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
2614 [_IOC_NR(_ioctl)] = { \
2615 .ioctl = _ioctl, \
2616 .flags = _flags, \
2617 .name = #_ioctl, \
2618 .func = _func, \
2619 .debug = _debug, \
2620 }
2621
2622 DEFINE_V4L_STUB_FUNC(g_fbuf)
2623 DEFINE_V4L_STUB_FUNC(s_fbuf)
2624 DEFINE_V4L_STUB_FUNC(expbuf)
2625 DEFINE_V4L_STUB_FUNC(g_std)
2626 DEFINE_V4L_STUB_FUNC(g_audio)
2627 DEFINE_V4L_STUB_FUNC(s_audio)
2628 DEFINE_V4L_STUB_FUNC(g_input)
2629 DEFINE_V4L_STUB_FUNC(g_edid)
2630 DEFINE_V4L_STUB_FUNC(s_edid)
2631 DEFINE_V4L_STUB_FUNC(g_output)
2632 DEFINE_V4L_STUB_FUNC(g_audout)
2633 DEFINE_V4L_STUB_FUNC(s_audout)
2634 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2635 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2636 DEFINE_V4L_STUB_FUNC(enumaudio)
2637 DEFINE_V4L_STUB_FUNC(enumaudout)
2638 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2639 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2640 DEFINE_V4L_STUB_FUNC(g_enc_index)
2641 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2642 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2643 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2644 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2645 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2646 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2647 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2648 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2649 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2650
2651 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2652 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2653 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2654 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2655 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2656 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2657 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2658 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2659 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2660 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2661 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2662 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2663 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2664 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2665 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2666 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2667 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2668 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2669 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2670 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2671 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2672 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2673 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2674 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2675 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2676 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2677 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2678 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2679 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2680 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2681 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2682 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2683 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2684 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2685 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2686 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2687 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2688 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2689 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2690 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2691 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2692 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2693 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2694 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2695 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2696 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2697 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2698 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2699 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2700 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2701 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2702 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2703 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2704 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2705 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2706 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)),
2707 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2708 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2709 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2710 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2711 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2712 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2713 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2714 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2715 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2716 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2717 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2718 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2719 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2720 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2721 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)),
2722 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2723 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2724 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2725 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2726 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2727 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2728 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2729 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2730 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2731 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2732 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)),
2733 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)),
2734 };
2735 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2736
2737 static bool v4l2_is_known_ioctl(unsigned int cmd)
2738 {
2739 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2740 return false;
2741 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2742 }
2743
2744 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2745 struct v4l2_fh *vfh, unsigned int cmd,
2746 void *arg)
2747 {
2748 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2749 return vdev->lock;
2750 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2751 if (vfh && vfh->m2m_ctx &&
2752 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2753 if (vfh->m2m_ctx->q_lock)
2754 return vfh->m2m_ctx->q_lock;
2755 }
2756 #endif
2757 if (vdev->queue && vdev->queue->lock &&
2758 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2759 return vdev->queue->lock;
2760 return vdev->lock;
2761 }
2762
2763 /* Common ioctl debug function. This function can be used by
2764 external ioctl messages as well as internal V4L ioctl */
2765 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2766 {
2767 const char *dir, *type;
2768
2769 if (prefix)
2770 printk(KERN_DEBUG "%s: ", prefix);
2771
2772 switch (_IOC_TYPE(cmd)) {
2773 case 'd':
2774 type = "v4l2_int";
2775 break;
2776 case 'V':
2777 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2778 type = "v4l2";
2779 break;
2780 }
2781 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2782 return;
2783 default:
2784 type = "unknown";
2785 break;
2786 }
2787
2788 switch (_IOC_DIR(cmd)) {
2789 case _IOC_NONE: dir = "--"; break;
2790 case _IOC_READ: dir = "r-"; break;
2791 case _IOC_WRITE: dir = "-w"; break;
2792 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2793 default: dir = "*ERR*"; break;
2794 }
2795 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2796 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2797 }
2798 EXPORT_SYMBOL(v4l_printk_ioctl);
2799
2800 static long __video_do_ioctl(struct file *file,
2801 unsigned int cmd, void *arg)
2802 {
2803 struct video_device *vfd = video_devdata(file);
2804 struct mutex *req_queue_lock = NULL;
2805 struct mutex *lock; /* ioctl serialization mutex */
2806 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2807 bool write_only = false;
2808 struct v4l2_ioctl_info default_info;
2809 const struct v4l2_ioctl_info *info;
2810 void *fh = file->private_data;
2811 struct v4l2_fh *vfh = NULL;
2812 int dev_debug = vfd->dev_debug;
2813 long ret = -ENOTTY;
2814
2815 if (ops == NULL) {
2816 pr_warn("%s: has no ioctl_ops.\n",
2817 video_device_node_name(vfd));
2818 return ret;
2819 }
2820
2821 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2822 vfh = file->private_data;
2823
2824 /*
2825 * We need to serialize streamon/off with queueing new requests.
2826 * These ioctls may trigger the cancellation of a streaming
2827 * operation, and that should not be mixed with queueing a new
2828 * request at the same time.
2829 */
2830 if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2831 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2832 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2833
2834 if (mutex_lock_interruptible(req_queue_lock))
2835 return -ERESTARTSYS;
2836 }
2837
2838 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2839
2840 if (lock && mutex_lock_interruptible(lock)) {
2841 if (req_queue_lock)
2842 mutex_unlock(req_queue_lock);
2843 return -ERESTARTSYS;
2844 }
2845
2846 if (!video_is_registered(vfd)) {
2847 ret = -ENODEV;
2848 goto unlock;
2849 }
2850
2851 if (v4l2_is_known_ioctl(cmd)) {
2852 info = &v4l2_ioctls[_IOC_NR(cmd)];
2853
2854 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2855 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2856 goto done;
2857
2858 if (vfh && (info->flags & INFO_FL_PRIO)) {
2859 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2860 if (ret)
2861 goto done;
2862 }
2863 } else {
2864 default_info.ioctl = cmd;
2865 default_info.flags = 0;
2866 default_info.debug = v4l_print_default;
2867 info = &default_info;
2868 }
2869
2870 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2871 if (info != &default_info) {
2872 ret = info->func(ops, file, fh, arg);
2873 } else if (!ops->vidioc_default) {
2874 ret = -ENOTTY;
2875 } else {
2876 ret = ops->vidioc_default(file, fh,
2877 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2878 cmd, arg);
2879 }
2880
2881 done:
2882 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2883 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2884 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2885 goto unlock;
2886
2887 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2888 if (ret < 0)
2889 pr_cont(": error %ld", ret);
2890 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2891 pr_cont("\n");
2892 else if (_IOC_DIR(cmd) == _IOC_NONE)
2893 info->debug(arg, write_only);
2894 else {
2895 pr_cont(": ");
2896 info->debug(arg, write_only);
2897 }
2898 }
2899
2900 unlock:
2901 if (lock)
2902 mutex_unlock(lock);
2903 if (req_queue_lock)
2904 mutex_unlock(req_queue_lock);
2905 return ret;
2906 }
2907
2908 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2909 void __user **user_ptr, void ***kernel_ptr)
2910 {
2911 int ret = 0;
2912
2913 switch (cmd) {
2914 case VIDIOC_PREPARE_BUF:
2915 case VIDIOC_QUERYBUF:
2916 case VIDIOC_QBUF:
2917 case VIDIOC_DQBUF: {
2918 struct v4l2_buffer *buf = parg;
2919
2920 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2921 if (buf->length > VIDEO_MAX_PLANES) {
2922 ret = -EINVAL;
2923 break;
2924 }
2925 *user_ptr = (void __user *)buf->m.planes;
2926 *kernel_ptr = (void **)&buf->m.planes;
2927 *array_size = sizeof(struct v4l2_plane) * buf->length;
2928 ret = 1;
2929 }
2930 break;
2931 }
2932
2933 case VIDIOC_G_EDID:
2934 case VIDIOC_S_EDID: {
2935 struct v4l2_edid *edid = parg;
2936
2937 if (edid->blocks) {
2938 if (edid->blocks > 256) {
2939 ret = -EINVAL;
2940 break;
2941 }
2942 *user_ptr = (void __user *)edid->edid;
2943 *kernel_ptr = (void **)&edid->edid;
2944 *array_size = edid->blocks * 128;
2945 ret = 1;
2946 }
2947 break;
2948 }
2949
2950 case VIDIOC_S_EXT_CTRLS:
2951 case VIDIOC_G_EXT_CTRLS:
2952 case VIDIOC_TRY_EXT_CTRLS: {
2953 struct v4l2_ext_controls *ctrls = parg;
2954
2955 if (ctrls->count != 0) {
2956 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2957 ret = -EINVAL;
2958 break;
2959 }
2960 *user_ptr = (void __user *)ctrls->controls;
2961 *kernel_ptr = (void **)&ctrls->controls;
2962 *array_size = sizeof(struct v4l2_ext_control)
2963 * ctrls->count;
2964 ret = 1;
2965 }
2966 break;
2967 }
2968 }
2969
2970 return ret;
2971 }
2972
2973 long
2974 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2975 v4l2_kioctl func)
2976 {
2977 char sbuf[128];
2978 void *mbuf = NULL;
2979 void *parg = (void *)arg;
2980 long err = -EINVAL;
2981 bool has_array_args;
2982 bool always_copy = false;
2983 size_t array_size = 0;
2984 void __user *user_ptr = NULL;
2985 void **kernel_ptr = NULL;
2986 const size_t ioc_size = _IOC_SIZE(cmd);
2987
2988 /* Copy arguments into temp kernel buffer */
2989 if (_IOC_DIR(cmd) != _IOC_NONE) {
2990 if (ioc_size <= sizeof(sbuf)) {
2991 parg = sbuf;
2992 } else {
2993 /* too big to allocate from stack */
2994 mbuf = kvmalloc(ioc_size, GFP_KERNEL);
2995 if (NULL == mbuf)
2996 return -ENOMEM;
2997 parg = mbuf;
2998 }
2999
3000 err = -EFAULT;
3001 if (_IOC_DIR(cmd) & _IOC_WRITE) {
3002 unsigned int n = ioc_size;
3003
3004 /*
3005 * In some cases, only a few fields are used as input,
3006 * i.e. when the app sets "index" and then the driver
3007 * fills in the rest of the structure for the thing
3008 * with that index. We only need to copy up the first
3009 * non-input field.
3010 */
3011 if (v4l2_is_known_ioctl(cmd)) {
3012 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
3013
3014 if (flags & INFO_FL_CLEAR_MASK)
3015 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3016 always_copy = flags & INFO_FL_ALWAYS_COPY;
3017 }
3018
3019 if (copy_from_user(parg, (void __user *)arg, n))
3020 goto out;
3021
3022 /* zero out anything we don't copy from userspace */
3023 if (n < ioc_size)
3024 memset((u8 *)parg + n, 0, ioc_size - n);
3025 } else {
3026 /* read-only ioctl */
3027 memset(parg, 0, ioc_size);
3028 }
3029 }
3030
3031 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3032 if (err < 0)
3033 goto out;
3034 has_array_args = err;
3035
3036 if (has_array_args) {
3037 /*
3038 * When adding new types of array args, make sure that the
3039 * parent argument to ioctl (which contains the pointer to the
3040 * array) fits into sbuf (so that mbuf will still remain
3041 * unused up to here).
3042 */
3043 mbuf = kvmalloc(array_size, GFP_KERNEL);
3044 err = -ENOMEM;
3045 if (NULL == mbuf)
3046 goto out_array_args;
3047 err = -EFAULT;
3048 if (copy_from_user(mbuf, user_ptr, array_size))
3049 goto out_array_args;
3050 *kernel_ptr = mbuf;
3051 }
3052
3053 /* Handles IOCTL */
3054 err = func(file, cmd, parg);
3055 if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3056 err = -ENOTTY;
3057 goto out;
3058 }
3059
3060 if (err == 0) {
3061 if (cmd == VIDIOC_DQBUF)
3062 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3063 else if (cmd == VIDIOC_QBUF)
3064 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3065 }
3066
3067 if (has_array_args) {
3068 *kernel_ptr = (void __force *)user_ptr;
3069 if (copy_to_user(user_ptr, mbuf, array_size))
3070 err = -EFAULT;
3071 goto out_array_args;
3072 }
3073 /*
3074 * Some ioctls can return an error, but still have valid
3075 * results that must be returned.
3076 */
3077 if (err < 0 && !always_copy)
3078 goto out;
3079
3080 out_array_args:
3081 /* Copy results into user buffer */
3082 switch (_IOC_DIR(cmd)) {
3083 case _IOC_READ:
3084 case (_IOC_WRITE | _IOC_READ):
3085 if (copy_to_user((void __user *)arg, parg, ioc_size))
3086 err = -EFAULT;
3087 break;
3088 }
3089
3090 out:
3091 kvfree(mbuf);
3092 return err;
3093 }
3094
3095 long video_ioctl2(struct file *file,
3096 unsigned int cmd, unsigned long arg)
3097 {
3098 return video_usercopy(file, cmd, arg, __video_do_ioctl);
3099 }
3100 EXPORT_SYMBOL(video_ioctl2);
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