1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Video capture interface for Linux version 2
4 *
5 * A generic framework to process V4L2 ioctl commands.
6 *
7 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
8 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
9 */
10
11 #include <linux/compat.h>
12 #include <linux/mm.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/version.h>
18
19 #include <linux/videodev2.h>
20
21 #include <media/v4l2-common.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/v4l2-ctrls.h>
24 #include <media/v4l2-fh.h>
25 #include <media/v4l2-event.h>
26 #include <media/v4l2-device.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/v4l2-mc.h>
29 #include <media/v4l2-mem2mem.h>
30
31 #include <trace/events/v4l2.h>
32
33 /* Zero out the end of the struct pointed to by p. Everything after, but
34 * not including, the specified field is cleared. */
35 #define CLEAR_AFTER_FIELD(p, field) \
36 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
37 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
38
39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
40
41 struct std_descr {
42 v4l2_std_id std;
43 const char *descr;
44 };
45
46 static const struct std_descr standards[] = {
47 { V4L2_STD_NTSC, "NTSC" },
48 { V4L2_STD_NTSC_M, "NTSC-M" },
49 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
50 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
51 { V4L2_STD_NTSC_443, "NTSC-443" },
52 { V4L2_STD_PAL, "PAL" },
53 { V4L2_STD_PAL_BG, "PAL-BG" },
54 { V4L2_STD_PAL_B, "PAL-B" },
55 { V4L2_STD_PAL_B1, "PAL-B1" },
56 { V4L2_STD_PAL_G, "PAL-G" },
57 { V4L2_STD_PAL_H, "PAL-H" },
58 { V4L2_STD_PAL_I, "PAL-I" },
59 { V4L2_STD_PAL_DK, "PAL-DK" },
60 { V4L2_STD_PAL_D, "PAL-D" },
61 { V4L2_STD_PAL_D1, "PAL-D1" },
62 { V4L2_STD_PAL_K, "PAL-K" },
63 { V4L2_STD_PAL_M, "PAL-M" },
64 { V4L2_STD_PAL_N, "PAL-N" },
65 { V4L2_STD_PAL_Nc, "PAL-Nc" },
66 { V4L2_STD_PAL_60, "PAL-60" },
67 { V4L2_STD_SECAM, "SECAM" },
68 { V4L2_STD_SECAM_B, "SECAM-B" },
69 { V4L2_STD_SECAM_G, "SECAM-G" },
70 { V4L2_STD_SECAM_H, "SECAM-H" },
71 { V4L2_STD_SECAM_DK, "SECAM-DK" },
72 { V4L2_STD_SECAM_D, "SECAM-D" },
73 { V4L2_STD_SECAM_K, "SECAM-K" },
74 { V4L2_STD_SECAM_K1, "SECAM-K1" },
75 { V4L2_STD_SECAM_L, "SECAM-L" },
76 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
77 { 0, "Unknown" }
78 };
79
80 /* video4linux standard ID conversion to standard name
81 */
v4l2_norm_to_name(v4l2_std_id id)82 const char *v4l2_norm_to_name(v4l2_std_id id)
83 {
84 u32 myid = id;
85 int i;
86
87 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
88 64 bit comparisons. So, on that architecture, with some gcc
89 variants, compilation fails. Currently, the max value is 30bit wide.
90 */
91 BUG_ON(myid != id);
92
93 for (i = 0; standards[i].std; i++)
94 if (myid == standards[i].std)
95 break;
96 return standards[i].descr;
97 }
98 EXPORT_SYMBOL(v4l2_norm_to_name);
99
100 /* Returns frame period for the given standard */
v4l2_video_std_frame_period(int id,struct v4l2_fract * frameperiod)101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
102 {
103 if (id & V4L2_STD_525_60) {
104 frameperiod->numerator = 1001;
105 frameperiod->denominator = 30000;
106 } else {
107 frameperiod->numerator = 1;
108 frameperiod->denominator = 25;
109 }
110 }
111 EXPORT_SYMBOL(v4l2_video_std_frame_period);
112
113 /* Fill in the fields of a v4l2_standard structure according to the
114 'id' and 'transmission' parameters. Returns negative on error. */
v4l2_video_std_construct(struct v4l2_standard * vs,int id,const char * name)115 int v4l2_video_std_construct(struct v4l2_standard *vs,
116 int id, const char *name)
117 {
118 vs->id = id;
119 v4l2_video_std_frame_period(id, &vs->frameperiod);
120 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
121 strscpy(vs->name, name, sizeof(vs->name));
122 return 0;
123 }
124 EXPORT_SYMBOL(v4l2_video_std_construct);
125
126 /* Fill in the fields of a v4l2_standard structure according to the
127 * 'id' and 'vs->index' parameters. Returns negative on error. */
v4l_video_std_enumstd(struct v4l2_standard * vs,v4l2_std_id id)128 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
129 {
130 v4l2_std_id curr_id = 0;
131 unsigned int index = vs->index, i, j = 0;
132 const char *descr = "";
133
134 /* Return -ENODATA if the id for the current input
135 or output is 0, meaning that it doesn't support this API. */
136 if (id == 0)
137 return -ENODATA;
138
139 /* Return norm array in a canonical way */
140 for (i = 0; i <= index && id; i++) {
141 /* last std value in the standards array is 0, so this
142 while always ends there since (id & 0) == 0. */
143 while ((id & standards[j].std) != standards[j].std)
144 j++;
145 curr_id = standards[j].std;
146 descr = standards[j].descr;
147 j++;
148 if (curr_id == 0)
149 break;
150 if (curr_id != V4L2_STD_PAL &&
151 curr_id != V4L2_STD_SECAM &&
152 curr_id != V4L2_STD_NTSC)
153 id &= ~curr_id;
154 }
155 if (i <= index)
156 return -EINVAL;
157
158 v4l2_video_std_construct(vs, curr_id, descr);
159 return 0;
160 }
161
162 /* ----------------------------------------------------------------- */
163 /* some arrays for pretty-printing debug messages of enum types */
164
165 const char *v4l2_field_names[] = {
166 [V4L2_FIELD_ANY] = "any",
167 [V4L2_FIELD_NONE] = "none",
168 [V4L2_FIELD_TOP] = "top",
169 [V4L2_FIELD_BOTTOM] = "bottom",
170 [V4L2_FIELD_INTERLACED] = "interlaced",
171 [V4L2_FIELD_SEQ_TB] = "seq-tb",
172 [V4L2_FIELD_SEQ_BT] = "seq-bt",
173 [V4L2_FIELD_ALTERNATE] = "alternate",
174 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
175 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
176 };
177 EXPORT_SYMBOL(v4l2_field_names);
178
179 const char *v4l2_type_names[] = {
180 [0] = "0",
181 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
182 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
183 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
184 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
185 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
186 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
187 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
188 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
189 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
190 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
191 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
192 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
193 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
194 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out",
195 };
196 EXPORT_SYMBOL(v4l2_type_names);
197
198 static const char *v4l2_memory_names[] = {
199 [V4L2_MEMORY_MMAP] = "mmap",
200 [V4L2_MEMORY_USERPTR] = "userptr",
201 [V4L2_MEMORY_OVERLAY] = "overlay",
202 [V4L2_MEMORY_DMABUF] = "dmabuf",
203 };
204
205 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
206
207 /* ------------------------------------------------------------------ */
208 /* debug help functions */
209
v4l_print_querycap(const void * arg,bool write_only)210 static void v4l_print_querycap(const void *arg, bool write_only)
211 {
212 const struct v4l2_capability *p = arg;
213
214 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
215 (int)sizeof(p->driver), p->driver,
216 (int)sizeof(p->card), p->card,
217 (int)sizeof(p->bus_info), p->bus_info,
218 p->version, p->capabilities, p->device_caps);
219 }
220
v4l_print_enuminput(const void * arg,bool write_only)221 static void v4l_print_enuminput(const void *arg, bool write_only)
222 {
223 const struct v4l2_input *p = arg;
224
225 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
226 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
227 p->tuner, (unsigned long long)p->std, p->status,
228 p->capabilities);
229 }
230
v4l_print_enumoutput(const void * arg,bool write_only)231 static void v4l_print_enumoutput(const void *arg, bool write_only)
232 {
233 const struct v4l2_output *p = arg;
234
235 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
236 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
237 p->modulator, (unsigned long long)p->std, p->capabilities);
238 }
239
v4l_print_audio(const void * arg,bool write_only)240 static void v4l_print_audio(const void *arg, bool write_only)
241 {
242 const struct v4l2_audio *p = arg;
243
244 if (write_only)
245 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
246 else
247 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
248 p->index, (int)sizeof(p->name), p->name,
249 p->capability, p->mode);
250 }
251
v4l_print_audioout(const void * arg,bool write_only)252 static void v4l_print_audioout(const void *arg, bool write_only)
253 {
254 const struct v4l2_audioout *p = arg;
255
256 if (write_only)
257 pr_cont("index=%u\n", p->index);
258 else
259 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
260 p->index, (int)sizeof(p->name), p->name,
261 p->capability, p->mode);
262 }
263
v4l_print_fmtdesc(const void * arg,bool write_only)264 static void v4l_print_fmtdesc(const void *arg, bool write_only)
265 {
266 const struct v4l2_fmtdesc *p = arg;
267
268 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
269 p->index, prt_names(p->type, v4l2_type_names),
270 p->flags, &p->pixelformat, p->mbus_code,
271 (int)sizeof(p->description), p->description);
272 }
273
v4l_print_format(const void * arg,bool write_only)274 static void v4l_print_format(const void *arg, bool write_only)
275 {
276 const struct v4l2_format *p = arg;
277 const struct v4l2_pix_format *pix;
278 const struct v4l2_pix_format_mplane *mp;
279 const struct v4l2_vbi_format *vbi;
280 const struct v4l2_sliced_vbi_format *sliced;
281 const struct v4l2_window *win;
282 const struct v4l2_sdr_format *sdr;
283 const struct v4l2_meta_format *meta;
284 u32 planes;
285 unsigned i;
286
287 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
288 switch (p->type) {
289 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
290 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
291 pix = &p->fmt.pix;
292 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
293 pix->width, pix->height, &pix->pixelformat,
294 prt_names(pix->field, v4l2_field_names),
295 pix->bytesperline, pix->sizeimage,
296 pix->colorspace, pix->flags, pix->ycbcr_enc,
297 pix->quantization, pix->xfer_func);
298 break;
299 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
300 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
301 mp = &p->fmt.pix_mp;
302 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
303 mp->width, mp->height, &mp->pixelformat,
304 prt_names(mp->field, v4l2_field_names),
305 mp->colorspace, mp->num_planes, mp->flags,
306 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
307 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
308 for (i = 0; i < planes; i++)
309 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
310 mp->plane_fmt[i].bytesperline,
311 mp->plane_fmt[i].sizeimage);
312 break;
313 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
314 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
315 win = &p->fmt.win;
316 /* Note: we can't print the clip list here since the clips
317 * pointer is a userspace pointer, not a kernelspace
318 * pointer. */
319 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",
320 win->w.width, win->w.height, win->w.left, win->w.top,
321 prt_names(win->field, v4l2_field_names),
322 win->chromakey, win->clipcount, win->clips,
323 win->bitmap, win->global_alpha);
324 break;
325 case V4L2_BUF_TYPE_VBI_CAPTURE:
326 case V4L2_BUF_TYPE_VBI_OUTPUT:
327 vbi = &p->fmt.vbi;
328 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n",
329 vbi->sampling_rate, vbi->offset,
330 vbi->samples_per_line, &vbi->sample_format,
331 vbi->start[0], vbi->start[1],
332 vbi->count[0], vbi->count[1]);
333 break;
334 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
335 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
336 sliced = &p->fmt.sliced;
337 pr_cont(", service_set=0x%08x, io_size=%d\n",
338 sliced->service_set, sliced->io_size);
339 for (i = 0; i < 24; i++)
340 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
341 sliced->service_lines[0][i],
342 sliced->service_lines[1][i]);
343 break;
344 case V4L2_BUF_TYPE_SDR_CAPTURE:
345 case V4L2_BUF_TYPE_SDR_OUTPUT:
346 sdr = &p->fmt.sdr;
347 pr_cont(", pixelformat=%p4cc\n", &sdr->pixelformat);
348 break;
349 case V4L2_BUF_TYPE_META_CAPTURE:
350 case V4L2_BUF_TYPE_META_OUTPUT:
351 meta = &p->fmt.meta;
352 pr_cont(", dataformat=%p4cc, buffersize=%u\n",
353 &meta->dataformat, meta->buffersize);
354 break;
355 }
356 }
357
v4l_print_framebuffer(const void * arg,bool write_only)358 static void v4l_print_framebuffer(const void *arg, bool write_only)
359 {
360 const struct v4l2_framebuffer *p = arg;
361
362 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
363 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
364 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage,
365 p->fmt.colorspace);
366 }
367
v4l_print_buftype(const void * arg,bool write_only)368 static void v4l_print_buftype(const void *arg, bool write_only)
369 {
370 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
371 }
372
v4l_print_modulator(const void * arg,bool write_only)373 static void v4l_print_modulator(const void *arg, bool write_only)
374 {
375 const struct v4l2_modulator *p = arg;
376
377 if (write_only)
378 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
379 else
380 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
381 p->index, (int)sizeof(p->name), p->name, p->capability,
382 p->rangelow, p->rangehigh, p->txsubchans);
383 }
384
v4l_print_tuner(const void * arg,bool write_only)385 static void v4l_print_tuner(const void *arg, bool write_only)
386 {
387 const struct v4l2_tuner *p = arg;
388
389 if (write_only)
390 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
391 else
392 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",
393 p->index, (int)sizeof(p->name), p->name, p->type,
394 p->capability, p->rangelow,
395 p->rangehigh, p->signal, p->afc,
396 p->rxsubchans, p->audmode);
397 }
398
v4l_print_frequency(const void * arg,bool write_only)399 static void v4l_print_frequency(const void *arg, bool write_only)
400 {
401 const struct v4l2_frequency *p = arg;
402
403 pr_cont("tuner=%u, type=%u, frequency=%u\n",
404 p->tuner, p->type, p->frequency);
405 }
406
v4l_print_standard(const void * arg,bool write_only)407 static void v4l_print_standard(const void *arg, bool write_only)
408 {
409 const struct v4l2_standard *p = arg;
410
411 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
412 p->index,
413 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
414 p->frameperiod.numerator,
415 p->frameperiod.denominator,
416 p->framelines);
417 }
418
v4l_print_std(const void * arg,bool write_only)419 static void v4l_print_std(const void *arg, bool write_only)
420 {
421 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
422 }
423
v4l_print_hw_freq_seek(const void * arg,bool write_only)424 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
425 {
426 const struct v4l2_hw_freq_seek *p = arg;
427
428 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
429 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
430 p->rangelow, p->rangehigh);
431 }
432
v4l_print_requestbuffers(const void * arg,bool write_only)433 static void v4l_print_requestbuffers(const void *arg, bool write_only)
434 {
435 const struct v4l2_requestbuffers *p = arg;
436
437 pr_cont("count=%d, type=%s, memory=%s\n",
438 p->count,
439 prt_names(p->type, v4l2_type_names),
440 prt_names(p->memory, v4l2_memory_names));
441 }
442
v4l_print_buffer(const void * arg,bool write_only)443 static void v4l_print_buffer(const void *arg, bool write_only)
444 {
445 const struct v4l2_buffer *p = arg;
446 const struct v4l2_timecode *tc = &p->timecode;
447 const struct v4l2_plane *plane;
448 int i;
449
450 pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
451 (int)p->timestamp.tv_sec / 3600,
452 ((int)p->timestamp.tv_sec / 60) % 60,
453 ((int)p->timestamp.tv_sec % 60),
454 (long)p->timestamp.tv_usec,
455 p->index,
456 prt_names(p->type, v4l2_type_names), p->request_fd,
457 p->flags, prt_names(p->field, v4l2_field_names),
458 p->sequence, prt_names(p->memory, v4l2_memory_names));
459
460 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
461 pr_cont("\n");
462 for (i = 0; i < p->length; ++i) {
463 plane = &p->m.planes[i];
464 printk(KERN_DEBUG
465 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
466 i, plane->bytesused, plane->data_offset,
467 plane->m.userptr, plane->length);
468 }
469 } else {
470 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
471 p->bytesused, p->m.userptr, p->length);
472 }
473
474 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
475 tc->hours, tc->minutes, tc->seconds,
476 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
477 }
478
v4l_print_exportbuffer(const void * arg,bool write_only)479 static void v4l_print_exportbuffer(const void *arg, bool write_only)
480 {
481 const struct v4l2_exportbuffer *p = arg;
482
483 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
484 p->fd, prt_names(p->type, v4l2_type_names),
485 p->index, p->plane, p->flags);
486 }
487
v4l_print_create_buffers(const void * arg,bool write_only)488 static void v4l_print_create_buffers(const void *arg, bool write_only)
489 {
490 const struct v4l2_create_buffers *p = arg;
491
492 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ",
493 p->index, p->count, prt_names(p->memory, v4l2_memory_names),
494 p->capabilities);
495 v4l_print_format(&p->format, write_only);
496 }
497
v4l_print_streamparm(const void * arg,bool write_only)498 static void v4l_print_streamparm(const void *arg, bool write_only)
499 {
500 const struct v4l2_streamparm *p = arg;
501
502 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
503
504 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
505 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
506 const struct v4l2_captureparm *c = &p->parm.capture;
507
508 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
509 c->capability, c->capturemode,
510 c->timeperframe.numerator, c->timeperframe.denominator,
511 c->extendedmode, c->readbuffers);
512 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
513 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
514 const struct v4l2_outputparm *c = &p->parm.output;
515
516 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
517 c->capability, c->outputmode,
518 c->timeperframe.numerator, c->timeperframe.denominator,
519 c->extendedmode, c->writebuffers);
520 } else {
521 pr_cont("\n");
522 }
523 }
524
v4l_print_queryctrl(const void * arg,bool write_only)525 static void v4l_print_queryctrl(const void *arg, bool write_only)
526 {
527 const struct v4l2_queryctrl *p = arg;
528
529 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
530 p->id, p->type, (int)sizeof(p->name), p->name,
531 p->minimum, p->maximum,
532 p->step, p->default_value, p->flags);
533 }
534
v4l_print_query_ext_ctrl(const void * arg,bool write_only)535 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
536 {
537 const struct v4l2_query_ext_ctrl *p = arg;
538
539 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",
540 p->id, p->type, (int)sizeof(p->name), p->name,
541 p->minimum, p->maximum,
542 p->step, p->default_value, p->flags,
543 p->elem_size, p->elems, p->nr_of_dims,
544 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
545 }
546
v4l_print_querymenu(const void * arg,bool write_only)547 static void v4l_print_querymenu(const void *arg, bool write_only)
548 {
549 const struct v4l2_querymenu *p = arg;
550
551 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
552 }
553
v4l_print_control(const void * arg,bool write_only)554 static void v4l_print_control(const void *arg, bool write_only)
555 {
556 const struct v4l2_control *p = arg;
557 const char *name = v4l2_ctrl_get_name(p->id);
558
559 if (name)
560 pr_cont("name=%s, ", name);
561 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
562 }
563
v4l_print_ext_controls(const void * arg,bool write_only)564 static void v4l_print_ext_controls(const void *arg, bool write_only)
565 {
566 const struct v4l2_ext_controls *p = arg;
567 int i;
568
569 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
570 p->which, p->count, p->error_idx, p->request_fd);
571 for (i = 0; i < p->count; i++) {
572 unsigned int id = p->controls[i].id;
573 const char *name = v4l2_ctrl_get_name(id);
574
575 if (name)
576 pr_cont(", name=%s", name);
577 if (!p->controls[i].size)
578 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
579 else
580 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size);
581 }
582 pr_cont("\n");
583 }
584
v4l_print_cropcap(const void * arg,bool write_only)585 static void v4l_print_cropcap(const void *arg, bool write_only)
586 {
587 const struct v4l2_cropcap *p = arg;
588
589 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
590 prt_names(p->type, v4l2_type_names),
591 p->bounds.width, p->bounds.height,
592 p->bounds.left, p->bounds.top,
593 p->defrect.width, p->defrect.height,
594 p->defrect.left, p->defrect.top,
595 p->pixelaspect.numerator, p->pixelaspect.denominator);
596 }
597
v4l_print_crop(const void * arg,bool write_only)598 static void v4l_print_crop(const void *arg, bool write_only)
599 {
600 const struct v4l2_crop *p = arg;
601
602 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
603 prt_names(p->type, v4l2_type_names),
604 p->c.width, p->c.height,
605 p->c.left, p->c.top);
606 }
607
v4l_print_selection(const void * arg,bool write_only)608 static void v4l_print_selection(const void *arg, bool write_only)
609 {
610 const struct v4l2_selection *p = arg;
611
612 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
613 prt_names(p->type, v4l2_type_names),
614 p->target, p->flags,
615 p->r.width, p->r.height, p->r.left, p->r.top);
616 }
617
v4l_print_jpegcompression(const void * arg,bool write_only)618 static void v4l_print_jpegcompression(const void *arg, bool write_only)
619 {
620 const struct v4l2_jpegcompression *p = arg;
621
622 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
623 p->quality, p->APPn, p->APP_len,
624 p->COM_len, p->jpeg_markers);
625 }
626
v4l_print_enc_idx(const void * arg,bool write_only)627 static void v4l_print_enc_idx(const void *arg, bool write_only)
628 {
629 const struct v4l2_enc_idx *p = arg;
630
631 pr_cont("entries=%d, entries_cap=%d\n",
632 p->entries, p->entries_cap);
633 }
634
v4l_print_encoder_cmd(const void * arg,bool write_only)635 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
636 {
637 const struct v4l2_encoder_cmd *p = arg;
638
639 pr_cont("cmd=%d, flags=0x%x\n",
640 p->cmd, p->flags);
641 }
642
v4l_print_decoder_cmd(const void * arg,bool write_only)643 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
644 {
645 const struct v4l2_decoder_cmd *p = arg;
646
647 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
648
649 if (p->cmd == V4L2_DEC_CMD_START)
650 pr_info("speed=%d, format=%u\n",
651 p->start.speed, p->start.format);
652 else if (p->cmd == V4L2_DEC_CMD_STOP)
653 pr_info("pts=%llu\n", p->stop.pts);
654 }
655
v4l_print_dbg_chip_info(const void * arg,bool write_only)656 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
657 {
658 const struct v4l2_dbg_chip_info *p = arg;
659
660 pr_cont("type=%u, ", p->match.type);
661 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
662 pr_cont("name=%.*s, ",
663 (int)sizeof(p->match.name), p->match.name);
664 else
665 pr_cont("addr=%u, ", p->match.addr);
666 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
667 }
668
v4l_print_dbg_register(const void * arg,bool write_only)669 static void v4l_print_dbg_register(const void *arg, bool write_only)
670 {
671 const struct v4l2_dbg_register *p = arg;
672
673 pr_cont("type=%u, ", p->match.type);
674 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
675 pr_cont("name=%.*s, ",
676 (int)sizeof(p->match.name), p->match.name);
677 else
678 pr_cont("addr=%u, ", p->match.addr);
679 pr_cont("reg=0x%llx, val=0x%llx\n",
680 p->reg, p->val);
681 }
682
v4l_print_dv_timings(const void * arg,bool write_only)683 static void v4l_print_dv_timings(const void *arg, bool write_only)
684 {
685 const struct v4l2_dv_timings *p = arg;
686
687 switch (p->type) {
688 case V4L2_DV_BT_656_1120:
689 pr_cont("type=bt-656/1120, interlaced=%u, 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",
690 p->bt.interlaced, p->bt.pixelclock,
691 p->bt.width, p->bt.height,
692 p->bt.polarities, p->bt.hfrontporch,
693 p->bt.hsync, p->bt.hbackporch,
694 p->bt.vfrontporch, p->bt.vsync,
695 p->bt.vbackporch, p->bt.il_vfrontporch,
696 p->bt.il_vsync, p->bt.il_vbackporch,
697 p->bt.standards, p->bt.flags);
698 break;
699 default:
700 pr_cont("type=%d\n", p->type);
701 break;
702 }
703 }
704
v4l_print_enum_dv_timings(const void * arg,bool write_only)705 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
706 {
707 const struct v4l2_enum_dv_timings *p = arg;
708
709 pr_cont("index=%u, ", p->index);
710 v4l_print_dv_timings(&p->timings, write_only);
711 }
712
v4l_print_dv_timings_cap(const void * arg,bool write_only)713 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
714 {
715 const struct v4l2_dv_timings_cap *p = arg;
716
717 switch (p->type) {
718 case V4L2_DV_BT_656_1120:
719 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
720 p->bt.min_width, p->bt.max_width,
721 p->bt.min_height, p->bt.max_height,
722 p->bt.min_pixelclock, p->bt.max_pixelclock,
723 p->bt.standards, p->bt.capabilities);
724 break;
725 default:
726 pr_cont("type=%u\n", p->type);
727 break;
728 }
729 }
730
v4l_print_frmsizeenum(const void * arg,bool write_only)731 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
732 {
733 const struct v4l2_frmsizeenum *p = arg;
734
735 pr_cont("index=%u, pixelformat=%p4cc, type=%u",
736 p->index, &p->pixel_format, p->type);
737 switch (p->type) {
738 case V4L2_FRMSIZE_TYPE_DISCRETE:
739 pr_cont(", wxh=%ux%u\n",
740 p->discrete.width, p->discrete.height);
741 break;
742 case V4L2_FRMSIZE_TYPE_STEPWISE:
743 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
744 p->stepwise.min_width,
745 p->stepwise.min_height,
746 p->stepwise.max_width,
747 p->stepwise.max_height,
748 p->stepwise.step_width,
749 p->stepwise.step_height);
750 break;
751 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
752 default:
753 pr_cont("\n");
754 break;
755 }
756 }
757
v4l_print_frmivalenum(const void * arg,bool write_only)758 static void v4l_print_frmivalenum(const void *arg, bool write_only)
759 {
760 const struct v4l2_frmivalenum *p = arg;
761
762 pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u",
763 p->index, &p->pixel_format, p->width, p->height, p->type);
764 switch (p->type) {
765 case V4L2_FRMIVAL_TYPE_DISCRETE:
766 pr_cont(", fps=%d/%d\n",
767 p->discrete.numerator,
768 p->discrete.denominator);
769 break;
770 case V4L2_FRMIVAL_TYPE_STEPWISE:
771 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
772 p->stepwise.min.numerator,
773 p->stepwise.min.denominator,
774 p->stepwise.max.numerator,
775 p->stepwise.max.denominator,
776 p->stepwise.step.numerator,
777 p->stepwise.step.denominator);
778 break;
779 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
780 default:
781 pr_cont("\n");
782 break;
783 }
784 }
785
v4l_print_event(const void * arg,bool write_only)786 static void v4l_print_event(const void *arg, bool write_only)
787 {
788 const struct v4l2_event *p = arg;
789 const struct v4l2_event_ctrl *c;
790
791 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n",
792 p->type, p->pending, p->sequence, p->id,
793 p->timestamp.tv_sec, p->timestamp.tv_nsec);
794 switch (p->type) {
795 case V4L2_EVENT_VSYNC:
796 printk(KERN_DEBUG "field=%s\n",
797 prt_names(p->u.vsync.field, v4l2_field_names));
798 break;
799 case V4L2_EVENT_CTRL:
800 c = &p->u.ctrl;
801 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
802 c->changes, c->type);
803 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
804 pr_cont("value64=%lld, ", c->value64);
805 else
806 pr_cont("value=%d, ", c->value);
807 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
808 c->flags, c->minimum, c->maximum,
809 c->step, c->default_value);
810 break;
811 case V4L2_EVENT_FRAME_SYNC:
812 pr_cont("frame_sequence=%u\n",
813 p->u.frame_sync.frame_sequence);
814 break;
815 }
816 }
817
v4l_print_event_subscription(const void * arg,bool write_only)818 static void v4l_print_event_subscription(const void *arg, bool write_only)
819 {
820 const struct v4l2_event_subscription *p = arg;
821
822 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
823 p->type, p->id, p->flags);
824 }
825
v4l_print_sliced_vbi_cap(const void * arg,bool write_only)826 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
827 {
828 const struct v4l2_sliced_vbi_cap *p = arg;
829 int i;
830
831 pr_cont("type=%s, service_set=0x%08x\n",
832 prt_names(p->type, v4l2_type_names), p->service_set);
833 for (i = 0; i < 24; i++)
834 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
835 p->service_lines[0][i],
836 p->service_lines[1][i]);
837 }
838
v4l_print_freq_band(const void * arg,bool write_only)839 static void v4l_print_freq_band(const void *arg, bool write_only)
840 {
841 const struct v4l2_frequency_band *p = arg;
842
843 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
844 p->tuner, p->type, p->index,
845 p->capability, p->rangelow,
846 p->rangehigh, p->modulation);
847 }
848
v4l_print_edid(const void * arg,bool write_only)849 static void v4l_print_edid(const void *arg, bool write_only)
850 {
851 const struct v4l2_edid *p = arg;
852
853 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
854 p->pad, p->start_block, p->blocks);
855 }
856
v4l_print_u32(const void * arg,bool write_only)857 static void v4l_print_u32(const void *arg, bool write_only)
858 {
859 pr_cont("value=%u\n", *(const u32 *)arg);
860 }
861
v4l_print_newline(const void * arg,bool write_only)862 static void v4l_print_newline(const void *arg, bool write_only)
863 {
864 pr_cont("\n");
865 }
866
v4l_print_default(const void * arg,bool write_only)867 static void v4l_print_default(const void *arg, bool write_only)
868 {
869 pr_cont("driver-specific ioctl\n");
870 }
871
check_ext_ctrls(struct v4l2_ext_controls * c,int allow_priv)872 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
873 {
874 __u32 i;
875
876 /* zero the reserved fields */
877 c->reserved[0] = 0;
878 for (i = 0; i < c->count; i++)
879 c->controls[i].reserved2[0] = 0;
880
881 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
882 when using extended controls.
883 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
884 is it allowed for backwards compatibility.
885 */
886 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
887 return 0;
888 if (!c->which)
889 return 1;
890 /* Check that all controls are from the same control class. */
891 for (i = 0; i < c->count; i++) {
892 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
893 c->error_idx = i;
894 return 0;
895 }
896 }
897 return 1;
898 }
899
check_fmt(struct file * file,enum v4l2_buf_type type)900 static int check_fmt(struct file *file, enum v4l2_buf_type type)
901 {
902 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
903 V4L2_CAP_VIDEO_CAPTURE_MPLANE |
904 V4L2_CAP_VIDEO_OUTPUT |
905 V4L2_CAP_VIDEO_OUTPUT_MPLANE |
906 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
907 const u32 meta_caps = V4L2_CAP_META_CAPTURE |
908 V4L2_CAP_META_OUTPUT;
909 struct video_device *vfd = video_devdata(file);
910 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
911 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
912 (vfd->device_caps & vid_caps);
913 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
914 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
915 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
916 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
917 (vfd->device_caps & meta_caps);
918 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
919 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
920
921 if (ops == NULL)
922 return -EINVAL;
923
924 switch (type) {
925 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
926 if ((is_vid || is_tch) && is_rx &&
927 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
928 return 0;
929 break;
930 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
931 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
932 return 0;
933 break;
934 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
935 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
936 return 0;
937 break;
938 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
939 if (is_vid && is_tx &&
940 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
941 return 0;
942 break;
943 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
944 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
945 return 0;
946 break;
947 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
948 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
949 return 0;
950 break;
951 case V4L2_BUF_TYPE_VBI_CAPTURE:
952 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
953 return 0;
954 break;
955 case V4L2_BUF_TYPE_VBI_OUTPUT:
956 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
957 return 0;
958 break;
959 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
960 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
961 return 0;
962 break;
963 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
964 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
965 return 0;
966 break;
967 case V4L2_BUF_TYPE_SDR_CAPTURE:
968 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
969 return 0;
970 break;
971 case V4L2_BUF_TYPE_SDR_OUTPUT:
972 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
973 return 0;
974 break;
975 case V4L2_BUF_TYPE_META_CAPTURE:
976 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
977 return 0;
978 break;
979 case V4L2_BUF_TYPE_META_OUTPUT:
980 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
981 return 0;
982 break;
983 default:
984 break;
985 }
986 return -EINVAL;
987 }
988
v4l_sanitize_format(struct v4l2_format * fmt)989 static void v4l_sanitize_format(struct v4l2_format *fmt)
990 {
991 unsigned int offset;
992
993 /* Make sure num_planes is not bogus */
994 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
995 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
996 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
997 VIDEO_MAX_PLANES);
998
999 /*
1000 * The v4l2_pix_format structure has been extended with fields that were
1001 * not previously required to be set to zero by applications. The priv
1002 * field, when set to a magic value, indicates the the extended fields
1003 * are valid. Otherwise they will contain undefined values. To simplify
1004 * the API towards drivers zero the extended fields and set the priv
1005 * field to the magic value when the extended pixel format structure
1006 * isn't used by applications.
1007 */
1008
1009 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1010 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1011 return;
1012
1013 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1014 return;
1015
1016 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1017
1018 offset = offsetof(struct v4l2_pix_format, priv)
1019 + sizeof(fmt->fmt.pix.priv);
1020 memset(((void *)&fmt->fmt.pix) + offset, 0,
1021 sizeof(fmt->fmt.pix) - offset);
1022 }
1023
v4l_querycap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1024 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1025 struct file *file, void *fh, void *arg)
1026 {
1027 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1028 struct video_device *vfd = video_devdata(file);
1029 int ret;
1030
1031 cap->version = LINUX_VERSION_CODE;
1032 cap->device_caps = vfd->device_caps;
1033 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1034
1035 ret = ops->vidioc_querycap(file, fh, cap);
1036
1037 /*
1038 * Drivers must not change device_caps, so check for this and
1039 * warn if this happened.
1040 */
1041 WARN_ON(cap->device_caps != vfd->device_caps);
1042 /*
1043 * Check that capabilities is a superset of
1044 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS
1045 */
1046 WARN_ON((cap->capabilities &
1047 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
1048 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
1049 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1050 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1051
1052 return ret;
1053 }
1054
v4l_g_input(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1055 static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
1056 struct file *file, void *fh, void *arg)
1057 {
1058 struct video_device *vfd = video_devdata(file);
1059
1060 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1061 *(int *)arg = 0;
1062 return 0;
1063 }
1064
1065 return ops->vidioc_g_input(file, fh, arg);
1066 }
1067
v4l_g_output(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1068 static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
1069 struct file *file, void *fh, void *arg)
1070 {
1071 struct video_device *vfd = video_devdata(file);
1072
1073 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1074 *(int *)arg = 0;
1075 return 0;
1076 }
1077
1078 return ops->vidioc_g_output(file, fh, arg);
1079 }
1080
v4l_s_input(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1081 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1082 struct file *file, void *fh, void *arg)
1083 {
1084 struct video_device *vfd = video_devdata(file);
1085 int ret;
1086
1087 ret = v4l_enable_media_source(vfd);
1088 if (ret)
1089 return ret;
1090
1091 if (vfd->device_caps & V4L2_CAP_IO_MC)
1092 return *(int *)arg ? -EINVAL : 0;
1093
1094 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1095 }
1096
v4l_s_output(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1097 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1098 struct file *file, void *fh, void *arg)
1099 {
1100 struct video_device *vfd = video_devdata(file);
1101
1102 if (vfd->device_caps & V4L2_CAP_IO_MC)
1103 return *(int *)arg ? -EINVAL : 0;
1104
1105 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1106 }
1107
v4l_g_priority(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1108 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1109 struct file *file, void *fh, void *arg)
1110 {
1111 struct video_device *vfd;
1112 u32 *p = arg;
1113
1114 vfd = video_devdata(file);
1115 *p = v4l2_prio_max(vfd->prio);
1116 return 0;
1117 }
1118
v4l_s_priority(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1119 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1120 struct file *file, void *fh, void *arg)
1121 {
1122 struct video_device *vfd;
1123 struct v4l2_fh *vfh;
1124 u32 *p = arg;
1125
1126 vfd = video_devdata(file);
1127 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1128 return -ENOTTY;
1129 vfh = file->private_data;
1130 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1131 }
1132
v4l_enuminput(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1133 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1134 struct file *file, void *fh, void *arg)
1135 {
1136 struct video_device *vfd = video_devdata(file);
1137 struct v4l2_input *p = arg;
1138
1139 /*
1140 * We set the flags for CAP_DV_TIMINGS &
1141 * CAP_STD here based on ioctl handler provided by the
1142 * driver. If the driver doesn't support these
1143 * for a specific input, it must override these flags.
1144 */
1145 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1146 p->capabilities |= V4L2_IN_CAP_STD;
1147
1148 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1149 if (p->index)
1150 return -EINVAL;
1151 strscpy(p->name, vfd->name, sizeof(p->name));
1152 p->type = V4L2_INPUT_TYPE_CAMERA;
1153 return 0;
1154 }
1155
1156 return ops->vidioc_enum_input(file, fh, p);
1157 }
1158
v4l_enumoutput(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1159 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1160 struct file *file, void *fh, void *arg)
1161 {
1162 struct video_device *vfd = video_devdata(file);
1163 struct v4l2_output *p = arg;
1164
1165 /*
1166 * We set the flags for CAP_DV_TIMINGS &
1167 * CAP_STD here based on ioctl handler provided by the
1168 * driver. If the driver doesn't support these
1169 * for a specific output, it must override these flags.
1170 */
1171 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1172 p->capabilities |= V4L2_OUT_CAP_STD;
1173
1174 if (vfd->device_caps & V4L2_CAP_IO_MC) {
1175 if (p->index)
1176 return -EINVAL;
1177 strscpy(p->name, vfd->name, sizeof(p->name));
1178 p->type = V4L2_OUTPUT_TYPE_ANALOG;
1179 return 0;
1180 }
1181
1182 return ops->vidioc_enum_output(file, fh, p);
1183 }
1184
v4l_fill_fmtdesc(struct v4l2_fmtdesc * fmt)1185 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1186 {
1187 const unsigned sz = sizeof(fmt->description);
1188 const char *descr = NULL;
1189 u32 flags = 0;
1190
1191 /*
1192 * We depart from the normal coding style here since the descriptions
1193 * should be aligned so it is easy to see which descriptions will be
1194 * longer than 31 characters (the max length for a description).
1195 * And frankly, this is easier to read anyway.
1196 *
1197 * Note that gcc will use O(log N) comparisons to find the right case.
1198 */
1199 switch (fmt->pixelformat) {
1200 /* Max description length mask: descr = "0123456789012345678901234567890" */
1201 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1202 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1203 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1204 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1205 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break;
1206 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break;
1207 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break;
1208 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break;
1209 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break;
1210 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break;
1211 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1212 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1213 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1214 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break;
1215 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break;
1216 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break;
1217 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break;
1218 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break;
1219 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break;
1220 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1221 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1222 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1223 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1224 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1225 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1226 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1227 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1228 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1229 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1230 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1231 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1232 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1233 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1234 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break;
1235 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break;
1236 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break;
1237 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break;
1238 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1239 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1240 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1241 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1242 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1243 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break;
1244 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1245 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1246 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1247 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
1248 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1249 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1250 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1251 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
1252 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
1253 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1254 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1255 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1256 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1257 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1258 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1259 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1260 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1261 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1262 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1263 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1264 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1265 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1266 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1267 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1268 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break;
1269 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1270 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break;
1271 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break;
1272 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break;
1273 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break;
1274 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1275 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1276 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1277 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1278 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1279 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1280 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1281 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1282 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1283 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1284 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1285 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1286 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1287 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1288 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1289 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1290 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1291 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1292 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1293 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1294 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1295 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1296 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1297 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1298 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1299 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1300 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1301 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1302 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1303 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1304 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1305 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1306 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1307 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1308 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1309 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1310 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1311 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1312 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1313 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1314 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1315 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1316 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1317 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1318 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1319 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1320 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1321 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1322 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1323 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1324 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1325 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1326 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1327 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1328 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1329 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break;
1330 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break;
1331 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break;
1332 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break;
1333 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1334 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1335 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1336 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1337 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1338 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1339 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1340 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1341 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1342 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1343 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1344 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1345 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1346 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1347 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1348 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1349 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1350 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1351 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1352 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1353 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1354 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1355 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1356 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
1357 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
1358 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
1359 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break;
1360 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break;
1361 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break;
1362 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break;
1363 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
1364 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
1365 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
1366 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
1367 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break;
1368 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break;
1369 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break;
1370
1371 default:
1372 /* Compressed formats */
1373 flags = V4L2_FMT_FLAG_COMPRESSED;
1374 switch (fmt->pixelformat) {
1375 /* Max description length mask: descr = "0123456789012345678901234567890" */
1376 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1377 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1378 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1379 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1380 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1381 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1382 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1383 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break;
1384 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1385 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1386 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1387 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break;
1388 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break;
1389 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1390 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1391 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1392 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1393 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
1394 case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1395 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
1396 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break;
1397 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
1398 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */
1399 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1400 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1401 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1402 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1403 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1404 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1405 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1406 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1407 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1408 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1409 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1410 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1411 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1412 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1413 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1414 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1415 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1416 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1417 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1418 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break;
1419 default:
1420 if (fmt->description[0])
1421 return;
1422 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1423 flags = 0;
1424 snprintf(fmt->description, sz, "%p4cc",
1425 &fmt->pixelformat);
1426 break;
1427 }
1428 }
1429
1430 if (descr)
1431 WARN_ON(strscpy(fmt->description, descr, sz) < 0);
1432 fmt->flags |= flags;
1433 }
1434
v4l_enum_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1435 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1436 struct file *file, void *fh, void *arg)
1437 {
1438 struct video_device *vdev = video_devdata(file);
1439 struct v4l2_fmtdesc *p = arg;
1440 int ret = check_fmt(file, p->type);
1441 u32 mbus_code;
1442 u32 cap_mask;
1443
1444 if (ret)
1445 return ret;
1446 ret = -EINVAL;
1447
1448 if (!(vdev->device_caps & V4L2_CAP_IO_MC))
1449 p->mbus_code = 0;
1450
1451 mbus_code = p->mbus_code;
1452 CLEAR_AFTER_FIELD(p, type);
1453 p->mbus_code = mbus_code;
1454
1455 switch (p->type) {
1456 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1457 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1458 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
1459 V4L2_CAP_VIDEO_M2M_MPLANE;
1460 if (!!(vdev->device_caps & cap_mask) !=
1461 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
1462 break;
1463
1464 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1465 break;
1466 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1467 break;
1468 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1469 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1470 break;
1471 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1472 break;
1473 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1474 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1475 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
1476 V4L2_CAP_VIDEO_M2M_MPLANE;
1477 if (!!(vdev->device_caps & cap_mask) !=
1478 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
1479 break;
1480
1481 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1482 break;
1483 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1484 break;
1485 case V4L2_BUF_TYPE_SDR_CAPTURE:
1486 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1487 break;
1488 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1489 break;
1490 case V4L2_BUF_TYPE_SDR_OUTPUT:
1491 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1492 break;
1493 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1494 break;
1495 case V4L2_BUF_TYPE_META_CAPTURE:
1496 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1497 break;
1498 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1499 break;
1500 case V4L2_BUF_TYPE_META_OUTPUT:
1501 if (unlikely(!ops->vidioc_enum_fmt_meta_out))
1502 break;
1503 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
1504 break;
1505 }
1506 if (ret == 0)
1507 v4l_fill_fmtdesc(p);
1508 return ret;
1509 }
1510
v4l_pix_format_touch(struct v4l2_pix_format * p)1511 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1512 {
1513 /*
1514 * The v4l2_pix_format structure contains fields that make no sense for
1515 * touch. Set them to default values in this case.
1516 */
1517
1518 p->field = V4L2_FIELD_NONE;
1519 p->colorspace = V4L2_COLORSPACE_RAW;
1520 p->flags = 0;
1521 p->ycbcr_enc = 0;
1522 p->quantization = 0;
1523 p->xfer_func = 0;
1524 }
1525
v4l_g_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1526 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1527 struct file *file, void *fh, void *arg)
1528 {
1529 struct v4l2_format *p = arg;
1530 struct video_device *vfd = video_devdata(file);
1531 int ret = check_fmt(file, p->type);
1532
1533 if (ret)
1534 return ret;
1535
1536 /*
1537 * fmt can't be cleared for these overlay types due to the 'clips'
1538 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1539 * Those are provided by the user. So handle these two overlay types
1540 * first, and then just do a simple memset for the other types.
1541 */
1542 switch (p->type) {
1543 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1544 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1545 struct v4l2_clip *clips = p->fmt.win.clips;
1546 u32 clipcount = p->fmt.win.clipcount;
1547 void __user *bitmap = p->fmt.win.bitmap;
1548
1549 memset(&p->fmt, 0, sizeof(p->fmt));
1550 p->fmt.win.clips = clips;
1551 p->fmt.win.clipcount = clipcount;
1552 p->fmt.win.bitmap = bitmap;
1553 break;
1554 }
1555 default:
1556 memset(&p->fmt, 0, sizeof(p->fmt));
1557 break;
1558 }
1559
1560 switch (p->type) {
1561 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1562 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1563 break;
1564 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1565 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1566 /* just in case the driver zeroed it again */
1567 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1568 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1569 v4l_pix_format_touch(&p->fmt.pix);
1570 return ret;
1571 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1572 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1573 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1574 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1575 case V4L2_BUF_TYPE_VBI_CAPTURE:
1576 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1577 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1578 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1579 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1580 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1581 break;
1582 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1583 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1584 /* just in case the driver zeroed it again */
1585 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1586 return ret;
1587 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1588 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1589 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1590 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1591 case V4L2_BUF_TYPE_VBI_OUTPUT:
1592 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1593 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1594 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1595 case V4L2_BUF_TYPE_SDR_CAPTURE:
1596 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1597 case V4L2_BUF_TYPE_SDR_OUTPUT:
1598 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1599 case V4L2_BUF_TYPE_META_CAPTURE:
1600 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1601 case V4L2_BUF_TYPE_META_OUTPUT:
1602 return ops->vidioc_g_fmt_meta_out(file, fh, arg);
1603 }
1604 return -EINVAL;
1605 }
1606
v4l_s_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1607 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1608 struct file *file, void *fh, void *arg)
1609 {
1610 struct v4l2_format *p = arg;
1611 struct video_device *vfd = video_devdata(file);
1612 int ret = check_fmt(file, p->type);
1613 unsigned int i;
1614
1615 if (ret)
1616 return ret;
1617
1618 ret = v4l_enable_media_source(vfd);
1619 if (ret)
1620 return ret;
1621 v4l_sanitize_format(p);
1622
1623 switch (p->type) {
1624 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1625 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1626 break;
1627 CLEAR_AFTER_FIELD(p, fmt.pix);
1628 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1629 /* just in case the driver zeroed it again */
1630 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1631 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1632 v4l_pix_format_touch(&p->fmt.pix);
1633 return ret;
1634 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1635 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1636 break;
1637 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1638 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1639 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1640 bytesperline);
1641 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1642 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1643 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1644 break;
1645 CLEAR_AFTER_FIELD(p, fmt.win);
1646 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1647 case V4L2_BUF_TYPE_VBI_CAPTURE:
1648 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1649 break;
1650 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1651 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1652 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1653 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1654 break;
1655 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1656 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1657 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1658 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1659 break;
1660 CLEAR_AFTER_FIELD(p, fmt.pix);
1661 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1662 /* just in case the driver zeroed it again */
1663 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1664 return ret;
1665 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1666 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1667 break;
1668 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1669 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1670 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1671 bytesperline);
1672 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1673 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1674 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1675 break;
1676 CLEAR_AFTER_FIELD(p, fmt.win);
1677 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1678 case V4L2_BUF_TYPE_VBI_OUTPUT:
1679 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1680 break;
1681 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1682 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1683 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1684 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1685 break;
1686 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1687 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1688 case V4L2_BUF_TYPE_SDR_CAPTURE:
1689 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1690 break;
1691 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1692 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1693 case V4L2_BUF_TYPE_SDR_OUTPUT:
1694 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1695 break;
1696 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1697 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1698 case V4L2_BUF_TYPE_META_CAPTURE:
1699 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1700 break;
1701 CLEAR_AFTER_FIELD(p, fmt.meta);
1702 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1703 case V4L2_BUF_TYPE_META_OUTPUT:
1704 if (unlikely(!ops->vidioc_s_fmt_meta_out))
1705 break;
1706 CLEAR_AFTER_FIELD(p, fmt.meta);
1707 return ops->vidioc_s_fmt_meta_out(file, fh, arg);
1708 }
1709 return -EINVAL;
1710 }
1711
v4l_try_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1712 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1713 struct file *file, void *fh, void *arg)
1714 {
1715 struct v4l2_format *p = arg;
1716 struct video_device *vfd = video_devdata(file);
1717 int ret = check_fmt(file, p->type);
1718 unsigned int i;
1719
1720 if (ret)
1721 return ret;
1722
1723 v4l_sanitize_format(p);
1724
1725 switch (p->type) {
1726 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1727 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1728 break;
1729 CLEAR_AFTER_FIELD(p, fmt.pix);
1730 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1731 /* just in case the driver zeroed it again */
1732 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1733 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1734 v4l_pix_format_touch(&p->fmt.pix);
1735 return ret;
1736 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1737 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1738 break;
1739 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1740 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1741 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1742 bytesperline);
1743 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1744 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1745 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1746 break;
1747 CLEAR_AFTER_FIELD(p, fmt.win);
1748 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1749 case V4L2_BUF_TYPE_VBI_CAPTURE:
1750 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1751 break;
1752 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1753 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1754 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1755 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1756 break;
1757 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1758 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1759 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1760 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1761 break;
1762 CLEAR_AFTER_FIELD(p, fmt.pix);
1763 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1764 /* just in case the driver zeroed it again */
1765 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1766 return ret;
1767 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1768 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1769 break;
1770 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1771 for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
1772 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
1773 bytesperline);
1774 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1775 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1776 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1777 break;
1778 CLEAR_AFTER_FIELD(p, fmt.win);
1779 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1780 case V4L2_BUF_TYPE_VBI_OUTPUT:
1781 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1782 break;
1783 CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
1784 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1785 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1786 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1787 break;
1788 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size);
1789 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1790 case V4L2_BUF_TYPE_SDR_CAPTURE:
1791 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1792 break;
1793 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1794 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1795 case V4L2_BUF_TYPE_SDR_OUTPUT:
1796 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1797 break;
1798 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
1799 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1800 case V4L2_BUF_TYPE_META_CAPTURE:
1801 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1802 break;
1803 CLEAR_AFTER_FIELD(p, fmt.meta);
1804 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1805 case V4L2_BUF_TYPE_META_OUTPUT:
1806 if (unlikely(!ops->vidioc_try_fmt_meta_out))
1807 break;
1808 CLEAR_AFTER_FIELD(p, fmt.meta);
1809 return ops->vidioc_try_fmt_meta_out(file, fh, arg);
1810 }
1811 return -EINVAL;
1812 }
1813
v4l_streamon(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1814 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1815 struct file *file, void *fh, void *arg)
1816 {
1817 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1818 }
1819
v4l_streamoff(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1820 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1821 struct file *file, void *fh, void *arg)
1822 {
1823 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1824 }
1825
v4l_g_tuner(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1826 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1827 struct file *file, void *fh, void *arg)
1828 {
1829 struct video_device *vfd = video_devdata(file);
1830 struct v4l2_tuner *p = arg;
1831 int err;
1832
1833 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1834 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1835 err = ops->vidioc_g_tuner(file, fh, p);
1836 if (!err)
1837 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1838 return err;
1839 }
1840
v4l_s_tuner(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1841 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1842 struct file *file, void *fh, void *arg)
1843 {
1844 struct video_device *vfd = video_devdata(file);
1845 struct v4l2_tuner *p = arg;
1846 int ret;
1847
1848 ret = v4l_enable_media_source(vfd);
1849 if (ret)
1850 return ret;
1851 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1852 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1853 return ops->vidioc_s_tuner(file, fh, p);
1854 }
1855
v4l_g_modulator(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1856 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1857 struct file *file, void *fh, void *arg)
1858 {
1859 struct video_device *vfd = video_devdata(file);
1860 struct v4l2_modulator *p = arg;
1861 int err;
1862
1863 if (vfd->vfl_type == VFL_TYPE_RADIO)
1864 p->type = V4L2_TUNER_RADIO;
1865
1866 err = ops->vidioc_g_modulator(file, fh, p);
1867 if (!err)
1868 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1869 return err;
1870 }
1871
v4l_s_modulator(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1872 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1873 struct file *file, void *fh, void *arg)
1874 {
1875 struct video_device *vfd = video_devdata(file);
1876 struct v4l2_modulator *p = arg;
1877
1878 if (vfd->vfl_type == VFL_TYPE_RADIO)
1879 p->type = V4L2_TUNER_RADIO;
1880
1881 return ops->vidioc_s_modulator(file, fh, p);
1882 }
1883
v4l_g_frequency(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1884 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1885 struct file *file, void *fh, void *arg)
1886 {
1887 struct video_device *vfd = video_devdata(file);
1888 struct v4l2_frequency *p = arg;
1889
1890 if (vfd->vfl_type == VFL_TYPE_SDR)
1891 p->type = V4L2_TUNER_SDR;
1892 else
1893 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1894 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1895 return ops->vidioc_g_frequency(file, fh, p);
1896 }
1897
v4l_s_frequency(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1898 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1899 struct file *file, void *fh, void *arg)
1900 {
1901 struct video_device *vfd = video_devdata(file);
1902 const struct v4l2_frequency *p = arg;
1903 enum v4l2_tuner_type type;
1904 int ret;
1905
1906 ret = v4l_enable_media_source(vfd);
1907 if (ret)
1908 return ret;
1909 if (vfd->vfl_type == VFL_TYPE_SDR) {
1910 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1911 return -EINVAL;
1912 } else {
1913 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1914 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1915 if (type != p->type)
1916 return -EINVAL;
1917 }
1918 return ops->vidioc_s_frequency(file, fh, p);
1919 }
1920
v4l_enumstd(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1921 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1922 struct file *file, void *fh, void *arg)
1923 {
1924 struct video_device *vfd = video_devdata(file);
1925 struct v4l2_standard *p = arg;
1926
1927 return v4l_video_std_enumstd(p, vfd->tvnorms);
1928 }
1929
v4l_s_std(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1930 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1931 struct file *file, void *fh, void *arg)
1932 {
1933 struct video_device *vfd = video_devdata(file);
1934 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1935 int ret;
1936
1937 ret = v4l_enable_media_source(vfd);
1938 if (ret)
1939 return ret;
1940 norm = id & vfd->tvnorms;
1941 if (vfd->tvnorms && !norm) /* Check if std is supported */
1942 return -EINVAL;
1943
1944 /* Calls the specific handler */
1945 return ops->vidioc_s_std(file, fh, norm);
1946 }
1947
v4l_querystd(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1948 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1949 struct file *file, void *fh, void *arg)
1950 {
1951 struct video_device *vfd = video_devdata(file);
1952 v4l2_std_id *p = arg;
1953 int ret;
1954
1955 ret = v4l_enable_media_source(vfd);
1956 if (ret)
1957 return ret;
1958 /*
1959 * If no signal is detected, then the driver should return
1960 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1961 * any standards that do not apply removed.
1962 *
1963 * This means that tuners, audio and video decoders can join
1964 * their efforts to improve the standards detection.
1965 */
1966 *p = vfd->tvnorms;
1967 return ops->vidioc_querystd(file, fh, arg);
1968 }
1969
v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1970 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1971 struct file *file, void *fh, void *arg)
1972 {
1973 struct video_device *vfd = video_devdata(file);
1974 struct v4l2_hw_freq_seek *p = arg;
1975 enum v4l2_tuner_type type;
1976 int ret;
1977
1978 ret = v4l_enable_media_source(vfd);
1979 if (ret)
1980 return ret;
1981 /* s_hw_freq_seek is not supported for SDR for now */
1982 if (vfd->vfl_type == VFL_TYPE_SDR)
1983 return -EINVAL;
1984
1985 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1986 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1987 if (p->type != type)
1988 return -EINVAL;
1989 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1990 }
1991
v4l_overlay(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1992 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1993 struct file *file, void *fh, void *arg)
1994 {
1995 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1996 }
1997
v4l_reqbufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1998 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1999 struct file *file, void *fh, void *arg)
2000 {
2001 struct v4l2_requestbuffers *p = arg;
2002 int ret = check_fmt(file, p->type);
2003
2004 if (ret)
2005 return ret;
2006
2007 CLEAR_AFTER_FIELD(p, capabilities);
2008
2009 return ops->vidioc_reqbufs(file, fh, p);
2010 }
2011
v4l_querybuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2012 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
2013 struct file *file, void *fh, void *arg)
2014 {
2015 struct v4l2_buffer *p = arg;
2016 int ret = check_fmt(file, p->type);
2017
2018 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
2019 }
2020
v4l_qbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2021 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
2022 struct file *file, void *fh, void *arg)
2023 {
2024 struct v4l2_buffer *p = arg;
2025 int ret = check_fmt(file, p->type);
2026
2027 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
2028 }
2029
v4l_dqbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2030 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
2031 struct file *file, void *fh, void *arg)
2032 {
2033 struct v4l2_buffer *p = arg;
2034 int ret = check_fmt(file, p->type);
2035
2036 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
2037 }
2038
v4l_create_bufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2039 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
2040 struct file *file, void *fh, void *arg)
2041 {
2042 struct v4l2_create_buffers *create = arg;
2043 int ret = check_fmt(file, create->format.type);
2044
2045 if (ret)
2046 return ret;
2047
2048 CLEAR_AFTER_FIELD(create, capabilities);
2049
2050 v4l_sanitize_format(&create->format);
2051
2052 ret = ops->vidioc_create_bufs(file, fh, create);
2053
2054 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2055 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
2056 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
2057
2058 return ret;
2059 }
2060
v4l_prepare_buf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2061 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
2062 struct file *file, void *fh, void *arg)
2063 {
2064 struct v4l2_buffer *b = arg;
2065 int ret = check_fmt(file, b->type);
2066
2067 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
2068 }
2069
v4l_g_parm(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2070 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
2071 struct file *file, void *fh, void *arg)
2072 {
2073 struct v4l2_streamparm *p = arg;
2074 v4l2_std_id std;
2075 int ret = check_fmt(file, p->type);
2076
2077 if (ret)
2078 return ret;
2079 if (ops->vidioc_g_parm)
2080 return ops->vidioc_g_parm(file, fh, p);
2081 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
2082 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2083 return -EINVAL;
2084 p->parm.capture.readbuffers = 2;
2085 ret = ops->vidioc_g_std(file, fh, &std);
2086 if (ret == 0)
2087 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
2088 return ret;
2089 }
2090
v4l_s_parm(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2091 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
2092 struct file *file, void *fh, void *arg)
2093 {
2094 struct v4l2_streamparm *p = arg;
2095 int ret = check_fmt(file, p->type);
2096
2097 if (ret)
2098 return ret;
2099
2100 /* Note: extendedmode is never used in drivers */
2101 if (V4L2_TYPE_IS_OUTPUT(p->type)) {
2102 memset(p->parm.output.reserved, 0,
2103 sizeof(p->parm.output.reserved));
2104 p->parm.output.extendedmode = 0;
2105 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
2106 } else {
2107 memset(p->parm.capture.reserved, 0,
2108 sizeof(p->parm.capture.reserved));
2109 p->parm.capture.extendedmode = 0;
2110 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
2111 }
2112 return ops->vidioc_s_parm(file, fh, p);
2113 }
2114
v4l_queryctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2115 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
2116 struct file *file, void *fh, void *arg)
2117 {
2118 struct video_device *vfd = video_devdata(file);
2119 struct v4l2_queryctrl *p = arg;
2120 struct v4l2_fh *vfh =
2121 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2122
2123 if (vfh && vfh->ctrl_handler)
2124 return v4l2_queryctrl(vfh->ctrl_handler, p);
2125 if (vfd->ctrl_handler)
2126 return v4l2_queryctrl(vfd->ctrl_handler, p);
2127 if (ops->vidioc_queryctrl)
2128 return ops->vidioc_queryctrl(file, fh, p);
2129 return -ENOTTY;
2130 }
2131
v4l_query_ext_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2132 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2133 struct file *file, void *fh, void *arg)
2134 {
2135 struct video_device *vfd = video_devdata(file);
2136 struct v4l2_query_ext_ctrl *p = arg;
2137 struct v4l2_fh *vfh =
2138 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2139
2140 if (vfh && vfh->ctrl_handler)
2141 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2142 if (vfd->ctrl_handler)
2143 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2144 if (ops->vidioc_query_ext_ctrl)
2145 return ops->vidioc_query_ext_ctrl(file, fh, p);
2146 return -ENOTTY;
2147 }
2148
v4l_querymenu(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2149 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2150 struct file *file, void *fh, void *arg)
2151 {
2152 struct video_device *vfd = video_devdata(file);
2153 struct v4l2_querymenu *p = arg;
2154 struct v4l2_fh *vfh =
2155 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2156
2157 if (vfh && vfh->ctrl_handler)
2158 return v4l2_querymenu(vfh->ctrl_handler, p);
2159 if (vfd->ctrl_handler)
2160 return v4l2_querymenu(vfd->ctrl_handler, p);
2161 if (ops->vidioc_querymenu)
2162 return ops->vidioc_querymenu(file, fh, p);
2163 return -ENOTTY;
2164 }
2165
v4l_g_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2166 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2167 struct file *file, void *fh, void *arg)
2168 {
2169 struct video_device *vfd = video_devdata(file);
2170 struct v4l2_control *p = arg;
2171 struct v4l2_fh *vfh =
2172 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2173 struct v4l2_ext_controls ctrls;
2174 struct v4l2_ext_control ctrl;
2175
2176 if (vfh && vfh->ctrl_handler)
2177 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2178 if (vfd->ctrl_handler)
2179 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2180 if (ops->vidioc_g_ctrl)
2181 return ops->vidioc_g_ctrl(file, fh, p);
2182 if (ops->vidioc_g_ext_ctrls == NULL)
2183 return -ENOTTY;
2184
2185 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2186 ctrls.count = 1;
2187 ctrls.controls = &ctrl;
2188 ctrl.id = p->id;
2189 ctrl.value = p->value;
2190 if (check_ext_ctrls(&ctrls, 1)) {
2191 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2192
2193 if (ret == 0)
2194 p->value = ctrl.value;
2195 return ret;
2196 }
2197 return -EINVAL;
2198 }
2199
v4l_s_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2200 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2201 struct file *file, void *fh, void *arg)
2202 {
2203 struct video_device *vfd = video_devdata(file);
2204 struct v4l2_control *p = arg;
2205 struct v4l2_fh *vfh =
2206 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2207 struct v4l2_ext_controls ctrls;
2208 struct v4l2_ext_control ctrl;
2209
2210 if (vfh && vfh->ctrl_handler)
2211 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2212 if (vfd->ctrl_handler)
2213 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2214 if (ops->vidioc_s_ctrl)
2215 return ops->vidioc_s_ctrl(file, fh, p);
2216 if (ops->vidioc_s_ext_ctrls == NULL)
2217 return -ENOTTY;
2218
2219 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2220 ctrls.count = 1;
2221 ctrls.controls = &ctrl;
2222 ctrl.id = p->id;
2223 ctrl.value = p->value;
2224 if (check_ext_ctrls(&ctrls, 1))
2225 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2226 return -EINVAL;
2227 }
2228
v4l_g_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2229 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2230 struct file *file, void *fh, void *arg)
2231 {
2232 struct video_device *vfd = video_devdata(file);
2233 struct v4l2_ext_controls *p = arg;
2234 struct v4l2_fh *vfh =
2235 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2236
2237 p->error_idx = p->count;
2238 if (vfh && vfh->ctrl_handler)
2239 return v4l2_g_ext_ctrls(vfh->ctrl_handler,
2240 vfd, vfd->v4l2_dev->mdev, p);
2241 if (vfd->ctrl_handler)
2242 return v4l2_g_ext_ctrls(vfd->ctrl_handler,
2243 vfd, vfd->v4l2_dev->mdev, p);
2244 if (ops->vidioc_g_ext_ctrls == NULL)
2245 return -ENOTTY;
2246 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2247 -EINVAL;
2248 }
2249
v4l_s_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2250 static int v4l_s_ext_ctrls(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_ext_controls *p = arg;
2255 struct v4l2_fh *vfh =
2256 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2257
2258 p->error_idx = p->count;
2259 if (vfh && vfh->ctrl_handler)
2260 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
2261 vfd, vfd->v4l2_dev->mdev, p);
2262 if (vfd->ctrl_handler)
2263 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
2264 vfd, vfd->v4l2_dev->mdev, p);
2265 if (ops->vidioc_s_ext_ctrls == NULL)
2266 return -ENOTTY;
2267 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2268 -EINVAL;
2269 }
2270
v4l_try_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2271 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2272 struct file *file, void *fh, void *arg)
2273 {
2274 struct video_device *vfd = video_devdata(file);
2275 struct v4l2_ext_controls *p = arg;
2276 struct v4l2_fh *vfh =
2277 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2278
2279 p->error_idx = p->count;
2280 if (vfh && vfh->ctrl_handler)
2281 return v4l2_try_ext_ctrls(vfh->ctrl_handler,
2282 vfd, vfd->v4l2_dev->mdev, p);
2283 if (vfd->ctrl_handler)
2284 return v4l2_try_ext_ctrls(vfd->ctrl_handler,
2285 vfd, vfd->v4l2_dev->mdev, p);
2286 if (ops->vidioc_try_ext_ctrls == NULL)
2287 return -ENOTTY;
2288 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2289 -EINVAL;
2290 }
2291
2292 /*
2293 * The selection API specified originally that the _MPLANE buffer types
2294 * shouldn't be used. The reasons for this are lost in the mists of time
2295 * (or just really crappy memories). Regardless, this is really annoying
2296 * for userspace. So to keep things simple we map _MPLANE buffer types
2297 * to their 'regular' counterparts before calling the driver. And we
2298 * restore it afterwards. This way applications can use either buffer
2299 * type and drivers don't need to check for both.
2300 */
v4l_g_selection(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2301 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2302 struct file *file, void *fh, void *arg)
2303 {
2304 struct v4l2_selection *p = arg;
2305 u32 old_type = p->type;
2306 int ret;
2307
2308 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2309 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2310 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2311 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2312 ret = ops->vidioc_g_selection(file, fh, p);
2313 p->type = old_type;
2314 return ret;
2315 }
2316
v4l_s_selection(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2317 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2318 struct file *file, void *fh, void *arg)
2319 {
2320 struct v4l2_selection *p = arg;
2321 u32 old_type = p->type;
2322 int ret;
2323
2324 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2325 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2326 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2327 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2328 ret = ops->vidioc_s_selection(file, fh, p);
2329 p->type = old_type;
2330 return ret;
2331 }
2332
v4l_g_crop(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2333 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2334 struct file *file, void *fh, void *arg)
2335 {
2336 struct video_device *vfd = video_devdata(file);
2337 struct v4l2_crop *p = arg;
2338 struct v4l2_selection s = {
2339 .type = p->type,
2340 };
2341 int ret;
2342
2343 /* simulate capture crop using selection api */
2344
2345 /* crop means compose for output devices */
2346 if (V4L2_TYPE_IS_OUTPUT(p->type))
2347 s.target = V4L2_SEL_TGT_COMPOSE;
2348 else
2349 s.target = V4L2_SEL_TGT_CROP;
2350
2351 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2352 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2353 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2354
2355 ret = v4l_g_selection(ops, file, fh, &s);
2356
2357 /* copying results to old structure on success */
2358 if (!ret)
2359 p->c = s.r;
2360 return ret;
2361 }
2362
v4l_s_crop(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2363 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2364 struct file *file, void *fh, void *arg)
2365 {
2366 struct video_device *vfd = video_devdata(file);
2367 struct v4l2_crop *p = arg;
2368 struct v4l2_selection s = {
2369 .type = p->type,
2370 .r = p->c,
2371 };
2372
2373 /* simulate capture crop using selection api */
2374
2375 /* crop means compose for output devices */
2376 if (V4L2_TYPE_IS_OUTPUT(p->type))
2377 s.target = V4L2_SEL_TGT_COMPOSE;
2378 else
2379 s.target = V4L2_SEL_TGT_CROP;
2380
2381 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2382 s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
2383 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
2384
2385 return v4l_s_selection(ops, file, fh, &s);
2386 }
2387
v4l_cropcap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2388 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2389 struct file *file, void *fh, void *arg)
2390 {
2391 struct video_device *vfd = video_devdata(file);
2392 struct v4l2_cropcap *p = arg;
2393 struct v4l2_selection s = { .type = p->type };
2394 int ret = 0;
2395
2396 /* setting trivial pixelaspect */
2397 p->pixelaspect.numerator = 1;
2398 p->pixelaspect.denominator = 1;
2399
2400 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2401 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2402 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2403 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2404
2405 /*
2406 * The determine_valid_ioctls() call already should ensure
2407 * that this can never happen, but just in case...
2408 */
2409 if (WARN_ON(!ops->vidioc_g_selection))
2410 return -ENOTTY;
2411
2412 if (ops->vidioc_g_pixelaspect)
2413 ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
2414 &p->pixelaspect);
2415
2416 /*
2417 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2418 * square pixel aspect ratio in that case.
2419 */
2420 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2421 return ret;
2422
2423 /* Use g_selection() to fill in the bounds and defrect rectangles */
2424
2425 /* obtaining bounds */
2426 if (V4L2_TYPE_IS_OUTPUT(p->type))
2427 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2428 else
2429 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2430
2431 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
2432 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
2433 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
2434
2435 ret = v4l_g_selection(ops, file, fh, &s);
2436 if (ret)
2437 return ret;
2438 p->bounds = s.r;
2439
2440 /* obtaining defrect */
2441 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
2442 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2443 else
2444 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2445
2446 ret = v4l_g_selection(ops, file, fh, &s);
2447 if (ret)
2448 return ret;
2449 p->defrect = s.r;
2450
2451 return 0;
2452 }
2453
v4l_log_status(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2454 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2455 struct file *file, void *fh, void *arg)
2456 {
2457 struct video_device *vfd = video_devdata(file);
2458 int ret;
2459
2460 if (vfd->v4l2_dev)
2461 pr_info("%s: ================= START STATUS =================\n",
2462 vfd->v4l2_dev->name);
2463 ret = ops->vidioc_log_status(file, fh);
2464 if (vfd->v4l2_dev)
2465 pr_info("%s: ================== END STATUS ==================\n",
2466 vfd->v4l2_dev->name);
2467 return ret;
2468 }
2469
v4l_dbg_g_register(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2470 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2471 struct file *file, void *fh, void *arg)
2472 {
2473 #ifdef CONFIG_VIDEO_ADV_DEBUG
2474 struct v4l2_dbg_register *p = arg;
2475 struct video_device *vfd = video_devdata(file);
2476 struct v4l2_subdev *sd;
2477 int idx = 0;
2478
2479 if (!capable(CAP_SYS_ADMIN))
2480 return -EPERM;
2481 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2482 if (vfd->v4l2_dev == NULL)
2483 return -EINVAL;
2484 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2485 if (p->match.addr == idx++)
2486 return v4l2_subdev_call(sd, core, g_register, p);
2487 return -EINVAL;
2488 }
2489 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2490 (ops->vidioc_g_chip_info || p->match.addr == 0))
2491 return ops->vidioc_g_register(file, fh, p);
2492 return -EINVAL;
2493 #else
2494 return -ENOTTY;
2495 #endif
2496 }
2497
v4l_dbg_s_register(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2498 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2499 struct file *file, void *fh, void *arg)
2500 {
2501 #ifdef CONFIG_VIDEO_ADV_DEBUG
2502 const struct v4l2_dbg_register *p = arg;
2503 struct video_device *vfd = video_devdata(file);
2504 struct v4l2_subdev *sd;
2505 int idx = 0;
2506
2507 if (!capable(CAP_SYS_ADMIN))
2508 return -EPERM;
2509 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2510 if (vfd->v4l2_dev == NULL)
2511 return -EINVAL;
2512 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2513 if (p->match.addr == idx++)
2514 return v4l2_subdev_call(sd, core, s_register, p);
2515 return -EINVAL;
2516 }
2517 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2518 (ops->vidioc_g_chip_info || p->match.addr == 0))
2519 return ops->vidioc_s_register(file, fh, p);
2520 return -EINVAL;
2521 #else
2522 return -ENOTTY;
2523 #endif
2524 }
2525
v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2526 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2527 struct file *file, void *fh, void *arg)
2528 {
2529 #ifdef CONFIG_VIDEO_ADV_DEBUG
2530 struct video_device *vfd = video_devdata(file);
2531 struct v4l2_dbg_chip_info *p = arg;
2532 struct v4l2_subdev *sd;
2533 int idx = 0;
2534
2535 switch (p->match.type) {
2536 case V4L2_CHIP_MATCH_BRIDGE:
2537 if (ops->vidioc_s_register)
2538 p->flags |= V4L2_CHIP_FL_WRITABLE;
2539 if (ops->vidioc_g_register)
2540 p->flags |= V4L2_CHIP_FL_READABLE;
2541 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2542 if (ops->vidioc_g_chip_info)
2543 return ops->vidioc_g_chip_info(file, fh, arg);
2544 if (p->match.addr)
2545 return -EINVAL;
2546 return 0;
2547
2548 case V4L2_CHIP_MATCH_SUBDEV:
2549 if (vfd->v4l2_dev == NULL)
2550 break;
2551 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2552 if (p->match.addr != idx++)
2553 continue;
2554 if (sd->ops->core && sd->ops->core->s_register)
2555 p->flags |= V4L2_CHIP_FL_WRITABLE;
2556 if (sd->ops->core && sd->ops->core->g_register)
2557 p->flags |= V4L2_CHIP_FL_READABLE;
2558 strscpy(p->name, sd->name, sizeof(p->name));
2559 return 0;
2560 }
2561 break;
2562 }
2563 return -EINVAL;
2564 #else
2565 return -ENOTTY;
2566 #endif
2567 }
2568
v4l_dqevent(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2569 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2570 struct file *file, void *fh, void *arg)
2571 {
2572 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2573 }
2574
v4l_subscribe_event(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2575 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2576 struct file *file, void *fh, void *arg)
2577 {
2578 return ops->vidioc_subscribe_event(fh, arg);
2579 }
2580
v4l_unsubscribe_event(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2581 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2582 struct file *file, void *fh, void *arg)
2583 {
2584 return ops->vidioc_unsubscribe_event(fh, arg);
2585 }
2586
v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2587 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2588 struct file *file, void *fh, void *arg)
2589 {
2590 struct v4l2_sliced_vbi_cap *p = arg;
2591 int ret = check_fmt(file, p->type);
2592
2593 if (ret)
2594 return ret;
2595
2596 /* Clear up to type, everything after type is zeroed already */
2597 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2598
2599 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2600 }
2601
v4l_enum_freq_bands(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2602 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2603 struct file *file, void *fh, void *arg)
2604 {
2605 struct video_device *vfd = video_devdata(file);
2606 struct v4l2_frequency_band *p = arg;
2607 enum v4l2_tuner_type type;
2608 int err;
2609
2610 if (vfd->vfl_type == VFL_TYPE_SDR) {
2611 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2612 return -EINVAL;
2613 type = p->type;
2614 } else {
2615 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2616 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2617 if (type != p->type)
2618 return -EINVAL;
2619 }
2620 if (ops->vidioc_enum_freq_bands) {
2621 err = ops->vidioc_enum_freq_bands(file, fh, p);
2622 if (err != -ENOTTY)
2623 return err;
2624 }
2625 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2626 struct v4l2_tuner t = {
2627 .index = p->tuner,
2628 .type = type,
2629 };
2630
2631 if (p->index)
2632 return -EINVAL;
2633 err = ops->vidioc_g_tuner(file, fh, &t);
2634 if (err)
2635 return err;
2636 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2637 p->rangelow = t.rangelow;
2638 p->rangehigh = t.rangehigh;
2639 p->modulation = (type == V4L2_TUNER_RADIO) ?
2640 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2641 return 0;
2642 }
2643 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2644 struct v4l2_modulator m = {
2645 .index = p->tuner,
2646 };
2647
2648 if (type != V4L2_TUNER_RADIO)
2649 return -EINVAL;
2650 if (p->index)
2651 return -EINVAL;
2652 err = ops->vidioc_g_modulator(file, fh, &m);
2653 if (err)
2654 return err;
2655 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2656 p->rangelow = m.rangelow;
2657 p->rangehigh = m.rangehigh;
2658 p->modulation = (type == V4L2_TUNER_RADIO) ?
2659 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2660 return 0;
2661 }
2662 return -ENOTTY;
2663 }
2664
2665 struct v4l2_ioctl_info {
2666 unsigned int ioctl;
2667 u32 flags;
2668 const char * const name;
2669 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2670 void *fh, void *p);
2671 void (*debug)(const void *arg, bool write_only);
2672 };
2673
2674 /* This control needs a priority check */
2675 #define INFO_FL_PRIO (1 << 0)
2676 /* This control can be valid if the filehandle passes a control handler. */
2677 #define INFO_FL_CTRL (1 << 1)
2678 /* Queuing ioctl */
2679 #define INFO_FL_QUEUE (1 << 2)
2680 /* Always copy back result, even on error */
2681 #define INFO_FL_ALWAYS_COPY (1 << 3)
2682 /* Zero struct from after the field to the end */
2683 #define INFO_FL_CLEAR(v4l2_struct, field) \
2684 ((offsetof(struct v4l2_struct, field) + \
2685 sizeof_field(struct v4l2_struct, field)) << 16)
2686 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2687
2688 #define DEFINE_V4L_STUB_FUNC(_vidioc) \
2689 static int v4l_stub_ ## _vidioc( \
2690 const struct v4l2_ioctl_ops *ops, \
2691 struct file *file, void *fh, void *p) \
2692 { \
2693 return ops->vidioc_ ## _vidioc(file, fh, p); \
2694 }
2695
2696 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
2697 [_IOC_NR(_ioctl)] = { \
2698 .ioctl = _ioctl, \
2699 .flags = _flags, \
2700 .name = #_ioctl, \
2701 .func = _func, \
2702 .debug = _debug, \
2703 }
2704
2705 DEFINE_V4L_STUB_FUNC(g_fbuf)
2706 DEFINE_V4L_STUB_FUNC(s_fbuf)
2707 DEFINE_V4L_STUB_FUNC(expbuf)
2708 DEFINE_V4L_STUB_FUNC(g_std)
2709 DEFINE_V4L_STUB_FUNC(g_audio)
2710 DEFINE_V4L_STUB_FUNC(s_audio)
2711 DEFINE_V4L_STUB_FUNC(g_edid)
2712 DEFINE_V4L_STUB_FUNC(s_edid)
2713 DEFINE_V4L_STUB_FUNC(g_audout)
2714 DEFINE_V4L_STUB_FUNC(s_audout)
2715 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2716 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2717 DEFINE_V4L_STUB_FUNC(enumaudio)
2718 DEFINE_V4L_STUB_FUNC(enumaudout)
2719 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2720 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2721 DEFINE_V4L_STUB_FUNC(g_enc_index)
2722 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2723 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2724 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2725 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2726 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2727 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2728 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2729 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2730 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2731
2732 static const struct v4l2_ioctl_info v4l2_ioctls[] = {
2733 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2734 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
2735 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2736 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2737 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2738 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2739 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2740 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2741 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2742 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2743 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2744 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2745 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2746 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2747 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2748 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2749 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2750 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2751 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2752 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2753 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2754 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2755 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2756 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2757 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2758 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2759 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2760 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2761 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
2762 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2763 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2764 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2765 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
2766 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2767 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2768 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2769 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2770 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2771 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2772 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2773 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2774 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2775 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2776 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2777 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2778 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2779 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2780 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2781 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2782 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2783 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2784 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2785 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2786 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2787 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)),
2788 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2789 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2790 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2791 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2792 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2793 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2794 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2795 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2796 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2797 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2798 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2799 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2800 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2801 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2802 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)),
2803 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2804 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2805 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2806 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2807 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2808 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2809 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2810 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2811 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2812 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2813 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)),
2814 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)),
2815 };
2816 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2817
v4l2_is_known_ioctl(unsigned int cmd)2818 static bool v4l2_is_known_ioctl(unsigned int cmd)
2819 {
2820 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2821 return false;
2822 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2823 }
2824
v4l2_ioctl_get_lock(struct video_device * vdev,struct v4l2_fh * vfh,unsigned int cmd,void * arg)2825 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2826 struct v4l2_fh *vfh, unsigned int cmd,
2827 void *arg)
2828 {
2829 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2830 return vdev->lock;
2831 if (vfh && vfh->m2m_ctx &&
2832 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2833 if (vfh->m2m_ctx->q_lock)
2834 return vfh->m2m_ctx->q_lock;
2835 }
2836 if (vdev->queue && vdev->queue->lock &&
2837 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2838 return vdev->queue->lock;
2839 return vdev->lock;
2840 }
2841
2842 /* Common ioctl debug function. This function can be used by
2843 external ioctl messages as well as internal V4L ioctl */
v4l_printk_ioctl(const char * prefix,unsigned int cmd)2844 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2845 {
2846 const char *dir, *type;
2847
2848 if (prefix)
2849 printk(KERN_DEBUG "%s: ", prefix);
2850
2851 switch (_IOC_TYPE(cmd)) {
2852 case 'd':
2853 type = "v4l2_int";
2854 break;
2855 case 'V':
2856 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2857 type = "v4l2";
2858 break;
2859 }
2860 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2861 return;
2862 default:
2863 type = "unknown";
2864 break;
2865 }
2866
2867 switch (_IOC_DIR(cmd)) {
2868 case _IOC_NONE: dir = "--"; break;
2869 case _IOC_READ: dir = "r-"; break;
2870 case _IOC_WRITE: dir = "-w"; break;
2871 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2872 default: dir = "*ERR*"; break;
2873 }
2874 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2875 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2876 }
2877 EXPORT_SYMBOL(v4l_printk_ioctl);
2878
__video_do_ioctl(struct file * file,unsigned int cmd,void * arg)2879 static long __video_do_ioctl(struct file *file,
2880 unsigned int cmd, void *arg)
2881 {
2882 struct video_device *vfd = video_devdata(file);
2883 struct mutex *req_queue_lock = NULL;
2884 struct mutex *lock; /* ioctl serialization mutex */
2885 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2886 bool write_only = false;
2887 struct v4l2_ioctl_info default_info;
2888 const struct v4l2_ioctl_info *info;
2889 void *fh = file->private_data;
2890 struct v4l2_fh *vfh = NULL;
2891 int dev_debug = vfd->dev_debug;
2892 long ret = -ENOTTY;
2893
2894 if (ops == NULL) {
2895 pr_warn("%s: has no ioctl_ops.\n",
2896 video_device_node_name(vfd));
2897 return ret;
2898 }
2899
2900 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2901 vfh = file->private_data;
2902
2903 /*
2904 * We need to serialize streamon/off with queueing new requests.
2905 * These ioctls may trigger the cancellation of a streaming
2906 * operation, and that should not be mixed with queueing a new
2907 * request at the same time.
2908 */
2909 if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
2910 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
2911 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
2912
2913 if (mutex_lock_interruptible(req_queue_lock))
2914 return -ERESTARTSYS;
2915 }
2916
2917 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2918
2919 if (lock && mutex_lock_interruptible(lock)) {
2920 if (req_queue_lock)
2921 mutex_unlock(req_queue_lock);
2922 return -ERESTARTSYS;
2923 }
2924
2925 if (!video_is_registered(vfd)) {
2926 ret = -ENODEV;
2927 goto unlock;
2928 }
2929
2930 if (v4l2_is_known_ioctl(cmd)) {
2931 info = &v4l2_ioctls[_IOC_NR(cmd)];
2932
2933 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2934 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2935 goto done;
2936
2937 if (vfh && (info->flags & INFO_FL_PRIO)) {
2938 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2939 if (ret)
2940 goto done;
2941 }
2942 } else {
2943 default_info.ioctl = cmd;
2944 default_info.flags = 0;
2945 default_info.debug = v4l_print_default;
2946 info = &default_info;
2947 }
2948
2949 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2950 if (info != &default_info) {
2951 ret = info->func(ops, file, fh, arg);
2952 } else if (!ops->vidioc_default) {
2953 ret = -ENOTTY;
2954 } else {
2955 ret = ops->vidioc_default(file, fh,
2956 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2957 cmd, arg);
2958 }
2959
2960 done:
2961 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2962 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2963 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2964 goto unlock;
2965
2966 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2967 if (ret < 0)
2968 pr_cont(": error %ld", ret);
2969 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2970 pr_cont("\n");
2971 else if (_IOC_DIR(cmd) == _IOC_NONE)
2972 info->debug(arg, write_only);
2973 else {
2974 pr_cont(": ");
2975 info->debug(arg, write_only);
2976 }
2977 }
2978
2979 unlock:
2980 if (lock)
2981 mutex_unlock(lock);
2982 if (req_queue_lock)
2983 mutex_unlock(req_queue_lock);
2984 return ret;
2985 }
2986
check_array_args(unsigned int cmd,void * parg,size_t * array_size,void __user ** user_ptr,void *** kernel_ptr)2987 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2988 void __user **user_ptr, void ***kernel_ptr)
2989 {
2990 int ret = 0;
2991
2992 switch (cmd) {
2993 case VIDIOC_PREPARE_BUF:
2994 case VIDIOC_QUERYBUF:
2995 case VIDIOC_QBUF:
2996 case VIDIOC_DQBUF: {
2997 struct v4l2_buffer *buf = parg;
2998
2999 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
3000 if (buf->length > VIDEO_MAX_PLANES) {
3001 ret = -EINVAL;
3002 break;
3003 }
3004 *user_ptr = (void __user *)buf->m.planes;
3005 *kernel_ptr = (void **)&buf->m.planes;
3006 *array_size = sizeof(struct v4l2_plane) * buf->length;
3007 ret = 1;
3008 }
3009 break;
3010 }
3011
3012 case VIDIOC_G_EDID:
3013 case VIDIOC_S_EDID: {
3014 struct v4l2_edid *edid = parg;
3015
3016 if (edid->blocks) {
3017 if (edid->blocks > 256) {
3018 ret = -EINVAL;
3019 break;
3020 }
3021 *user_ptr = (void __user *)edid->edid;
3022 *kernel_ptr = (void **)&edid->edid;
3023 *array_size = edid->blocks * 128;
3024 ret = 1;
3025 }
3026 break;
3027 }
3028
3029 case VIDIOC_S_EXT_CTRLS:
3030 case VIDIOC_G_EXT_CTRLS:
3031 case VIDIOC_TRY_EXT_CTRLS: {
3032 struct v4l2_ext_controls *ctrls = parg;
3033
3034 if (ctrls->count != 0) {
3035 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
3036 ret = -EINVAL;
3037 break;
3038 }
3039 *user_ptr = (void __user *)ctrls->controls;
3040 *kernel_ptr = (void **)&ctrls->controls;
3041 *array_size = sizeof(struct v4l2_ext_control)
3042 * ctrls->count;
3043 ret = 1;
3044 }
3045 break;
3046 }
3047 case VIDIOC_G_FMT:
3048 case VIDIOC_S_FMT:
3049 case VIDIOC_TRY_FMT: {
3050 struct v4l2_format *fmt = parg;
3051
3052 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
3053 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
3054 break;
3055 if (fmt->fmt.win.clipcount > 2048)
3056 return -EINVAL;
3057 if (!fmt->fmt.win.clipcount)
3058 break;
3059
3060 *user_ptr = (void __user *)fmt->fmt.win.clips;
3061 *kernel_ptr = (void **)&fmt->fmt.win.clips;
3062 *array_size = sizeof(struct v4l2_clip)
3063 * fmt->fmt.win.clipcount;
3064
3065 ret = 1;
3066 break;
3067 }
3068 }
3069
3070 return ret;
3071 }
3072
video_translate_cmd(unsigned int cmd)3073 static unsigned int video_translate_cmd(unsigned int cmd)
3074 {
3075 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3076 switch (cmd) {
3077 case VIDIOC_DQEVENT_TIME32:
3078 return VIDIOC_DQEVENT;
3079 case VIDIOC_QUERYBUF_TIME32:
3080 return VIDIOC_QUERYBUF;
3081 case VIDIOC_QBUF_TIME32:
3082 return VIDIOC_QBUF;
3083 case VIDIOC_DQBUF_TIME32:
3084 return VIDIOC_DQBUF;
3085 case VIDIOC_PREPARE_BUF_TIME32:
3086 return VIDIOC_PREPARE_BUF;
3087 }
3088 #endif
3089 if (in_compat_syscall())
3090 return v4l2_compat_translate_cmd(cmd);
3091
3092 return cmd;
3093 }
3094
video_get_user(void __user * arg,void * parg,unsigned int real_cmd,unsigned int cmd,bool * always_copy)3095 static int video_get_user(void __user *arg, void *parg,
3096 unsigned int real_cmd, unsigned int cmd,
3097 bool *always_copy)
3098 {
3099 unsigned int n = _IOC_SIZE(real_cmd);
3100 int err = 0;
3101
3102 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
3103 /* read-only ioctl */
3104 memset(parg, 0, n);
3105 return 0;
3106 }
3107
3108 /*
3109 * In some cases, only a few fields are used as input,
3110 * i.e. when the app sets "index" and then the driver
3111 * fills in the rest of the structure for the thing
3112 * with that index. We only need to copy up the first
3113 * non-input field.
3114 */
3115 if (v4l2_is_known_ioctl(real_cmd)) {
3116 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
3117
3118 if (flags & INFO_FL_CLEAR_MASK)
3119 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
3120 *always_copy = flags & INFO_FL_ALWAYS_COPY;
3121 }
3122
3123 if (cmd == real_cmd) {
3124 if (copy_from_user(parg, (void __user *)arg, n))
3125 err = -EFAULT;
3126 } else if (in_compat_syscall()) {
3127 memset(parg, 0, n);
3128 err = v4l2_compat_get_user(arg, parg, cmd);
3129 } else {
3130 memset(parg, 0, n);
3131 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3132 switch (cmd) {
3133 case VIDIOC_QUERYBUF_TIME32:
3134 case VIDIOC_QBUF_TIME32:
3135 case VIDIOC_DQBUF_TIME32:
3136 case VIDIOC_PREPARE_BUF_TIME32: {
3137 struct v4l2_buffer_time32 vb32;
3138 struct v4l2_buffer *vb = parg;
3139
3140 if (copy_from_user(&vb32, arg, sizeof(vb32)))
3141 return -EFAULT;
3142
3143 *vb = (struct v4l2_buffer) {
3144 .index = vb32.index,
3145 .type = vb32.type,
3146 .bytesused = vb32.bytesused,
3147 .flags = vb32.flags,
3148 .field = vb32.field,
3149 .timestamp.tv_sec = vb32.timestamp.tv_sec,
3150 .timestamp.tv_usec = vb32.timestamp.tv_usec,
3151 .timecode = vb32.timecode,
3152 .sequence = vb32.sequence,
3153 .memory = vb32.memory,
3154 .m.userptr = vb32.m.userptr,
3155 .length = vb32.length,
3156 .request_fd = vb32.request_fd,
3157 };
3158 break;
3159 }
3160 }
3161 #endif
3162 }
3163
3164 /* zero out anything we don't copy from userspace */
3165 if (!err && n < _IOC_SIZE(real_cmd))
3166 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
3167 return err;
3168 }
3169
video_put_user(void __user * arg,void * parg,unsigned int real_cmd,unsigned int cmd)3170 static int video_put_user(void __user *arg, void *parg,
3171 unsigned int real_cmd, unsigned int cmd)
3172 {
3173 if (!(_IOC_DIR(cmd) & _IOC_READ))
3174 return 0;
3175
3176 if (cmd == real_cmd) {
3177 /* Copy results into user buffer */
3178 if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
3179 return -EFAULT;
3180 return 0;
3181 }
3182
3183 if (in_compat_syscall())
3184 return v4l2_compat_put_user(arg, parg, cmd);
3185
3186 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
3187 switch (cmd) {
3188 case VIDIOC_DQEVENT_TIME32: {
3189 struct v4l2_event *ev = parg;
3190 struct v4l2_event_time32 ev32;
3191
3192 memset(&ev32, 0, sizeof(ev32));
3193
3194 ev32.type = ev->type;
3195 ev32.pending = ev->pending;
3196 ev32.sequence = ev->sequence;
3197 ev32.timestamp.tv_sec = ev->timestamp.tv_sec;
3198 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec;
3199 ev32.id = ev->id;
3200
3201 memcpy(&ev32.u, &ev->u, sizeof(ev->u));
3202 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
3203
3204 if (copy_to_user(arg, &ev32, sizeof(ev32)))
3205 return -EFAULT;
3206 break;
3207 }
3208 case VIDIOC_QUERYBUF_TIME32:
3209 case VIDIOC_QBUF_TIME32:
3210 case VIDIOC_DQBUF_TIME32:
3211 case VIDIOC_PREPARE_BUF_TIME32: {
3212 struct v4l2_buffer *vb = parg;
3213 struct v4l2_buffer_time32 vb32;
3214
3215 memset(&vb32, 0, sizeof(vb32));
3216
3217 vb32.index = vb->index;
3218 vb32.type = vb->type;
3219 vb32.bytesused = vb->bytesused;
3220 vb32.flags = vb->flags;
3221 vb32.field = vb->field;
3222 vb32.timestamp.tv_sec = vb->timestamp.tv_sec;
3223 vb32.timestamp.tv_usec = vb->timestamp.tv_usec;
3224 vb32.timecode = vb->timecode;
3225 vb32.sequence = vb->sequence;
3226 vb32.memory = vb->memory;
3227 vb32.m.userptr = vb->m.userptr;
3228 vb32.length = vb->length;
3229 vb32.request_fd = vb->request_fd;
3230
3231 if (copy_to_user(arg, &vb32, sizeof(vb32)))
3232 return -EFAULT;
3233 break;
3234 }
3235 }
3236 #endif
3237
3238 return 0;
3239 }
3240
3241 long
video_usercopy(struct file * file,unsigned int orig_cmd,unsigned long arg,v4l2_kioctl func)3242 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
3243 v4l2_kioctl func)
3244 {
3245 char sbuf[128];
3246 void *mbuf = NULL, *array_buf = NULL;
3247 void *parg = (void *)arg;
3248 long err = -EINVAL;
3249 bool has_array_args;
3250 bool always_copy = false;
3251 size_t array_size = 0;
3252 void __user *user_ptr = NULL;
3253 void **kernel_ptr = NULL;
3254 unsigned int cmd = video_translate_cmd(orig_cmd);
3255 const size_t ioc_size = _IOC_SIZE(cmd);
3256
3257 /* Copy arguments into temp kernel buffer */
3258 if (_IOC_DIR(cmd) != _IOC_NONE) {
3259 if (ioc_size <= sizeof(sbuf)) {
3260 parg = sbuf;
3261 } else {
3262 /* too big to allocate from stack */
3263 mbuf = kmalloc(ioc_size, GFP_KERNEL);
3264 if (NULL == mbuf)
3265 return -ENOMEM;
3266 parg = mbuf;
3267 }
3268
3269 err = video_get_user((void __user *)arg, parg, cmd,
3270 orig_cmd, &always_copy);
3271 if (err)
3272 goto out;
3273 }
3274
3275 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
3276 if (err < 0)
3277 goto out;
3278 has_array_args = err;
3279
3280 if (has_array_args) {
3281 array_buf = kvmalloc(array_size, GFP_KERNEL);
3282 err = -ENOMEM;
3283 if (array_buf == NULL)
3284 goto out_array_args;
3285 err = -EFAULT;
3286 if (in_compat_syscall())
3287 err = v4l2_compat_get_array_args(file, array_buf,
3288 user_ptr, array_size,
3289 orig_cmd, parg);
3290 else
3291 err = copy_from_user(array_buf, user_ptr, array_size) ?
3292 -EFAULT : 0;
3293 if (err)
3294 goto out_array_args;
3295 *kernel_ptr = array_buf;
3296 }
3297
3298 /* Handles IOCTL */
3299 err = func(file, cmd, parg);
3300 if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3301 err = -ENOTTY;
3302 goto out;
3303 }
3304
3305 if (err == 0) {
3306 if (cmd == VIDIOC_DQBUF)
3307 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3308 else if (cmd == VIDIOC_QBUF)
3309 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3310 }
3311
3312 if (has_array_args) {
3313 *kernel_ptr = (void __force *)user_ptr;
3314 if (in_compat_syscall()) {
3315 int put_err;
3316
3317 put_err = v4l2_compat_put_array_args(file, user_ptr,
3318 array_buf,
3319 array_size,
3320 orig_cmd, parg);
3321 if (put_err)
3322 err = put_err;
3323 } else if (copy_to_user(user_ptr, array_buf, array_size)) {
3324 err = -EFAULT;
3325 }
3326 goto out_array_args;
3327 }
3328 /*
3329 * Some ioctls can return an error, but still have valid
3330 * results that must be returned.
3331 */
3332 if (err < 0 && !always_copy)
3333 goto out;
3334
3335 out_array_args:
3336 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
3337 err = -EFAULT;
3338 out:
3339 kvfree(array_buf);
3340 kfree(mbuf);
3341 return err;
3342 }
3343
video_ioctl2(struct file * file,unsigned int cmd,unsigned long arg)3344 long video_ioctl2(struct file *file,
3345 unsigned int cmd, unsigned long arg)
3346 {
3347 return video_usercopy(file, cmd, arg, __video_do_ioctl);
3348 }
3349 EXPORT_SYMBOL(video_ioctl2);
3350
