1 /*
2 * Video capture interface for Linux version 2
3 *
4 * A generic framework to process V4L2 ioctl commands.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
13 */
14
15 #include <linux/mm.h>
16 #include <linux/module.h>
17 #include <linux/slab.h>
18 #include <linux/types.h>
19 #include <linux/kernel.h>
20 #include <linux/version.h>
21
22 #include <linux/videodev2.h>
23
24 #include <media/v4l2-common.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-fh.h>
28 #include <media/v4l2-event.h>
29 #include <media/v4l2-device.h>
30 #include <media/videobuf2-v4l2.h>
31 #include <media/v4l2-mc.h>
32 #include <media/v4l2-mem2mem.h>
33
34 #include <trace/events/v4l2.h>
35
36 /* Zero out the end of the struct pointed to by p. Everything after, but
37 * not including, the specified field is cleared. */
38 #define CLEAR_AFTER_FIELD(p, field) \
39 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
40 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
41
42 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
43
44 struct std_descr {
45 v4l2_std_id std;
46 const char *descr;
47 };
48
49 static const struct std_descr standards[] = {
50 { V4L2_STD_NTSC, "NTSC" },
51 { V4L2_STD_NTSC_M, "NTSC-M" },
52 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
53 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
54 { V4L2_STD_NTSC_443, "NTSC-443" },
55 { V4L2_STD_PAL, "PAL" },
56 { V4L2_STD_PAL_BG, "PAL-BG" },
57 { V4L2_STD_PAL_B, "PAL-B" },
58 { V4L2_STD_PAL_B1, "PAL-B1" },
59 { V4L2_STD_PAL_G, "PAL-G" },
60 { V4L2_STD_PAL_H, "PAL-H" },
61 { V4L2_STD_PAL_I, "PAL-I" },
62 { V4L2_STD_PAL_DK, "PAL-DK" },
63 { V4L2_STD_PAL_D, "PAL-D" },
64 { V4L2_STD_PAL_D1, "PAL-D1" },
65 { V4L2_STD_PAL_K, "PAL-K" },
66 { V4L2_STD_PAL_M, "PAL-M" },
67 { V4L2_STD_PAL_N, "PAL-N" },
68 { V4L2_STD_PAL_Nc, "PAL-Nc" },
69 { V4L2_STD_PAL_60, "PAL-60" },
70 { V4L2_STD_SECAM, "SECAM" },
71 { V4L2_STD_SECAM_B, "SECAM-B" },
72 { V4L2_STD_SECAM_G, "SECAM-G" },
73 { V4L2_STD_SECAM_H, "SECAM-H" },
74 { V4L2_STD_SECAM_DK, "SECAM-DK" },
75 { V4L2_STD_SECAM_D, "SECAM-D" },
76 { V4L2_STD_SECAM_K, "SECAM-K" },
77 { V4L2_STD_SECAM_K1, "SECAM-K1" },
78 { V4L2_STD_SECAM_L, "SECAM-L" },
79 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
80 { 0, "Unknown" }
81 };
82
83 /* video4linux standard ID conversion to standard name
84 */
v4l2_norm_to_name(v4l2_std_id id)85 const char *v4l2_norm_to_name(v4l2_std_id id)
86 {
87 u32 myid = id;
88 int i;
89
90 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
91 64 bit comparations. So, on that architecture, with some gcc
92 variants, compilation fails. Currently, the max value is 30bit wide.
93 */
94 BUG_ON(myid != id);
95
96 for (i = 0; standards[i].std; i++)
97 if (myid == standards[i].std)
98 break;
99 return standards[i].descr;
100 }
101 EXPORT_SYMBOL(v4l2_norm_to_name);
102
103 /* Returns frame period for the given standard */
v4l2_video_std_frame_period(int id,struct v4l2_fract * frameperiod)104 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
105 {
106 if (id & V4L2_STD_525_60) {
107 frameperiod->numerator = 1001;
108 frameperiod->denominator = 30000;
109 } else {
110 frameperiod->numerator = 1;
111 frameperiod->denominator = 25;
112 }
113 }
114 EXPORT_SYMBOL(v4l2_video_std_frame_period);
115
116 /* Fill in the fields of a v4l2_standard structure according to the
117 'id' and 'transmission' parameters. Returns negative on error. */
v4l2_video_std_construct(struct v4l2_standard * vs,int id,const char * name)118 int v4l2_video_std_construct(struct v4l2_standard *vs,
119 int id, const char *name)
120 {
121 vs->id = id;
122 v4l2_video_std_frame_period(id, &vs->frameperiod);
123 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
124 strlcpy(vs->name, name, sizeof(vs->name));
125 return 0;
126 }
127 EXPORT_SYMBOL(v4l2_video_std_construct);
128
129 /* Fill in the fields of a v4l2_standard structure according to the
130 * 'id' and 'vs->index' parameters. Returns negative on error. */
v4l_video_std_enumstd(struct v4l2_standard * vs,v4l2_std_id id)131 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
132 {
133 v4l2_std_id curr_id = 0;
134 unsigned int index = vs->index, i, j = 0;
135 const char *descr = "";
136
137 /* Return -ENODATA if the id for the current input
138 or output is 0, meaning that it doesn't support this API. */
139 if (id == 0)
140 return -ENODATA;
141
142 /* Return norm array in a canonical way */
143 for (i = 0; i <= index && id; i++) {
144 /* last std value in the standards array is 0, so this
145 while always ends there since (id & 0) == 0. */
146 while ((id & standards[j].std) != standards[j].std)
147 j++;
148 curr_id = standards[j].std;
149 descr = standards[j].descr;
150 j++;
151 if (curr_id == 0)
152 break;
153 if (curr_id != V4L2_STD_PAL &&
154 curr_id != V4L2_STD_SECAM &&
155 curr_id != V4L2_STD_NTSC)
156 id &= ~curr_id;
157 }
158 if (i <= index)
159 return -EINVAL;
160
161 v4l2_video_std_construct(vs, curr_id, descr);
162 return 0;
163 }
164
165 /* ----------------------------------------------------------------- */
166 /* some arrays for pretty-printing debug messages of enum types */
167
168 const char *v4l2_field_names[] = {
169 [V4L2_FIELD_ANY] = "any",
170 [V4L2_FIELD_NONE] = "none",
171 [V4L2_FIELD_TOP] = "top",
172 [V4L2_FIELD_BOTTOM] = "bottom",
173 [V4L2_FIELD_INTERLACED] = "interlaced",
174 [V4L2_FIELD_SEQ_TB] = "seq-tb",
175 [V4L2_FIELD_SEQ_BT] = "seq-bt",
176 [V4L2_FIELD_ALTERNATE] = "alternate",
177 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
178 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
179 };
180 EXPORT_SYMBOL(v4l2_field_names);
181
182 const char *v4l2_type_names[] = {
183 [0] = "0",
184 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
185 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
186 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
187 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
188 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
189 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
190 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
191 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
192 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
193 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
194 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
195 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
196 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
197 };
198 EXPORT_SYMBOL(v4l2_type_names);
199
200 static const char *v4l2_memory_names[] = {
201 [V4L2_MEMORY_MMAP] = "mmap",
202 [V4L2_MEMORY_USERPTR] = "userptr",
203 [V4L2_MEMORY_OVERLAY] = "overlay",
204 [V4L2_MEMORY_DMABUF] = "dmabuf",
205 };
206
207 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
208
209 /* ------------------------------------------------------------------ */
210 /* debug help functions */
211
v4l_print_querycap(const void * arg,bool write_only)212 static void v4l_print_querycap(const void *arg, bool write_only)
213 {
214 const struct v4l2_capability *p = arg;
215
216 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
217 (int)sizeof(p->driver), p->driver,
218 (int)sizeof(p->card), p->card,
219 (int)sizeof(p->bus_info), p->bus_info,
220 p->version, p->capabilities, p->device_caps);
221 }
222
v4l_print_enuminput(const void * arg,bool write_only)223 static void v4l_print_enuminput(const void *arg, bool write_only)
224 {
225 const struct v4l2_input *p = arg;
226
227 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
228 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
229 p->tuner, (unsigned long long)p->std, p->status,
230 p->capabilities);
231 }
232
v4l_print_enumoutput(const void * arg,bool write_only)233 static void v4l_print_enumoutput(const void *arg, bool write_only)
234 {
235 const struct v4l2_output *p = arg;
236
237 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
238 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
239 p->modulator, (unsigned long long)p->std, p->capabilities);
240 }
241
v4l_print_audio(const void * arg,bool write_only)242 static void v4l_print_audio(const void *arg, bool write_only)
243 {
244 const struct v4l2_audio *p = arg;
245
246 if (write_only)
247 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
248 else
249 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
250 p->index, (int)sizeof(p->name), p->name,
251 p->capability, p->mode);
252 }
253
v4l_print_audioout(const void * arg,bool write_only)254 static void v4l_print_audioout(const void *arg, bool write_only)
255 {
256 const struct v4l2_audioout *p = arg;
257
258 if (write_only)
259 pr_cont("index=%u\n", p->index);
260 else
261 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
262 p->index, (int)sizeof(p->name), p->name,
263 p->capability, p->mode);
264 }
265
v4l_print_fmtdesc(const void * arg,bool write_only)266 static void v4l_print_fmtdesc(const void *arg, bool write_only)
267 {
268 const struct v4l2_fmtdesc *p = arg;
269
270 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
271 p->index, prt_names(p->type, v4l2_type_names),
272 p->flags, (p->pixelformat & 0xff),
273 (p->pixelformat >> 8) & 0xff,
274 (p->pixelformat >> 16) & 0xff,
275 (p->pixelformat >> 24) & 0xff,
276 (int)sizeof(p->description), p->description);
277 }
278
v4l_print_format(const void * arg,bool write_only)279 static void v4l_print_format(const void *arg, bool write_only)
280 {
281 const struct v4l2_format *p = arg;
282 const struct v4l2_pix_format *pix;
283 const struct v4l2_pix_format_mplane *mp;
284 const struct v4l2_vbi_format *vbi;
285 const struct v4l2_sliced_vbi_format *sliced;
286 const struct v4l2_window *win;
287 const struct v4l2_sdr_format *sdr;
288 const struct v4l2_meta_format *meta;
289 unsigned i;
290
291 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
292 switch (p->type) {
293 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
294 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
295 pix = &p->fmt.pix;
296 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
297 pix->width, pix->height,
298 (pix->pixelformat & 0xff),
299 (pix->pixelformat >> 8) & 0xff,
300 (pix->pixelformat >> 16) & 0xff,
301 (pix->pixelformat >> 24) & 0xff,
302 prt_names(pix->field, v4l2_field_names),
303 pix->bytesperline, pix->sizeimage,
304 pix->colorspace, pix->flags, pix->ycbcr_enc,
305 pix->quantization, pix->xfer_func);
306 break;
307 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
308 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
309 mp = &p->fmt.pix_mp;
310 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
311 mp->width, mp->height,
312 (mp->pixelformat & 0xff),
313 (mp->pixelformat >> 8) & 0xff,
314 (mp->pixelformat >> 16) & 0xff,
315 (mp->pixelformat >> 24) & 0xff,
316 prt_names(mp->field, v4l2_field_names),
317 mp->colorspace, mp->num_planes, mp->flags,
318 mp->ycbcr_enc, mp->quantization, mp->xfer_func);
319 for (i = 0; i < mp->num_planes; i++)
320 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
321 mp->plane_fmt[i].bytesperline,
322 mp->plane_fmt[i].sizeimage);
323 break;
324 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
325 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
326 win = &p->fmt.win;
327 /* Note: we can't print the clip list here since the clips
328 * pointer is a userspace pointer, not a kernelspace
329 * pointer. */
330 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",
331 win->w.width, win->w.height, win->w.left, win->w.top,
332 prt_names(win->field, v4l2_field_names),
333 win->chromakey, win->clipcount, win->clips,
334 win->bitmap, win->global_alpha);
335 break;
336 case V4L2_BUF_TYPE_VBI_CAPTURE:
337 case V4L2_BUF_TYPE_VBI_OUTPUT:
338 vbi = &p->fmt.vbi;
339 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
340 vbi->sampling_rate, vbi->offset,
341 vbi->samples_per_line,
342 (vbi->sample_format & 0xff),
343 (vbi->sample_format >> 8) & 0xff,
344 (vbi->sample_format >> 16) & 0xff,
345 (vbi->sample_format >> 24) & 0xff,
346 vbi->start[0], vbi->start[1],
347 vbi->count[0], vbi->count[1]);
348 break;
349 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
350 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
351 sliced = &p->fmt.sliced;
352 pr_cont(", service_set=0x%08x, io_size=%d\n",
353 sliced->service_set, sliced->io_size);
354 for (i = 0; i < 24; i++)
355 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
356 sliced->service_lines[0][i],
357 sliced->service_lines[1][i]);
358 break;
359 case V4L2_BUF_TYPE_SDR_CAPTURE:
360 case V4L2_BUF_TYPE_SDR_OUTPUT:
361 sdr = &p->fmt.sdr;
362 pr_cont(", pixelformat=%c%c%c%c\n",
363 (sdr->pixelformat >> 0) & 0xff,
364 (sdr->pixelformat >> 8) & 0xff,
365 (sdr->pixelformat >> 16) & 0xff,
366 (sdr->pixelformat >> 24) & 0xff);
367 break;
368 case V4L2_BUF_TYPE_META_CAPTURE:
369 meta = &p->fmt.meta;
370 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n",
371 (meta->dataformat >> 0) & 0xff,
372 (meta->dataformat >> 8) & 0xff,
373 (meta->dataformat >> 16) & 0xff,
374 (meta->dataformat >> 24) & 0xff,
375 meta->buffersize);
376 break;
377 }
378 }
379
v4l_print_framebuffer(const void * arg,bool write_only)380 static void v4l_print_framebuffer(const void *arg, bool write_only)
381 {
382 const struct v4l2_framebuffer *p = arg;
383
384 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
385 p->capability, p->flags, p->base,
386 p->fmt.width, p->fmt.height,
387 (p->fmt.pixelformat & 0xff),
388 (p->fmt.pixelformat >> 8) & 0xff,
389 (p->fmt.pixelformat >> 16) & 0xff,
390 (p->fmt.pixelformat >> 24) & 0xff,
391 p->fmt.bytesperline, p->fmt.sizeimage,
392 p->fmt.colorspace);
393 }
394
v4l_print_buftype(const void * arg,bool write_only)395 static void v4l_print_buftype(const void *arg, bool write_only)
396 {
397 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
398 }
399
v4l_print_modulator(const void * arg,bool write_only)400 static void v4l_print_modulator(const void *arg, bool write_only)
401 {
402 const struct v4l2_modulator *p = arg;
403
404 if (write_only)
405 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
406 else
407 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
408 p->index, (int)sizeof(p->name), p->name, p->capability,
409 p->rangelow, p->rangehigh, p->txsubchans);
410 }
411
v4l_print_tuner(const void * arg,bool write_only)412 static void v4l_print_tuner(const void *arg, bool write_only)
413 {
414 const struct v4l2_tuner *p = arg;
415
416 if (write_only)
417 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
418 else
419 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",
420 p->index, (int)sizeof(p->name), p->name, p->type,
421 p->capability, p->rangelow,
422 p->rangehigh, p->signal, p->afc,
423 p->rxsubchans, p->audmode);
424 }
425
v4l_print_frequency(const void * arg,bool write_only)426 static void v4l_print_frequency(const void *arg, bool write_only)
427 {
428 const struct v4l2_frequency *p = arg;
429
430 pr_cont("tuner=%u, type=%u, frequency=%u\n",
431 p->tuner, p->type, p->frequency);
432 }
433
v4l_print_standard(const void * arg,bool write_only)434 static void v4l_print_standard(const void *arg, bool write_only)
435 {
436 const struct v4l2_standard *p = arg;
437
438 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
439 p->index,
440 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
441 p->frameperiod.numerator,
442 p->frameperiod.denominator,
443 p->framelines);
444 }
445
v4l_print_std(const void * arg,bool write_only)446 static void v4l_print_std(const void *arg, bool write_only)
447 {
448 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
449 }
450
v4l_print_hw_freq_seek(const void * arg,bool write_only)451 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
452 {
453 const struct v4l2_hw_freq_seek *p = arg;
454
455 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
456 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
457 p->rangelow, p->rangehigh);
458 }
459
v4l_print_requestbuffers(const void * arg,bool write_only)460 static void v4l_print_requestbuffers(const void *arg, bool write_only)
461 {
462 const struct v4l2_requestbuffers *p = arg;
463
464 pr_cont("count=%d, type=%s, memory=%s\n",
465 p->count,
466 prt_names(p->type, v4l2_type_names),
467 prt_names(p->memory, v4l2_memory_names));
468 }
469
v4l_print_buffer(const void * arg,bool write_only)470 static void v4l_print_buffer(const void *arg, bool write_only)
471 {
472 const struct v4l2_buffer *p = arg;
473 const struct v4l2_timecode *tc = &p->timecode;
474 const struct v4l2_plane *plane;
475 int i;
476
477 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
478 p->timestamp.tv_sec / 3600,
479 (int)(p->timestamp.tv_sec / 60) % 60,
480 (int)(p->timestamp.tv_sec % 60),
481 (long)p->timestamp.tv_usec,
482 p->index,
483 prt_names(p->type, v4l2_type_names),
484 p->flags, prt_names(p->field, v4l2_field_names),
485 p->sequence, prt_names(p->memory, v4l2_memory_names));
486
487 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
488 pr_cont("\n");
489 for (i = 0; i < p->length; ++i) {
490 plane = &p->m.planes[i];
491 printk(KERN_DEBUG
492 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
493 i, plane->bytesused, plane->data_offset,
494 plane->m.userptr, plane->length);
495 }
496 } else {
497 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
498 p->bytesused, p->m.userptr, p->length);
499 }
500
501 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
502 tc->hours, tc->minutes, tc->seconds,
503 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
504 }
505
v4l_print_exportbuffer(const void * arg,bool write_only)506 static void v4l_print_exportbuffer(const void *arg, bool write_only)
507 {
508 const struct v4l2_exportbuffer *p = arg;
509
510 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
511 p->fd, prt_names(p->type, v4l2_type_names),
512 p->index, p->plane, p->flags);
513 }
514
v4l_print_create_buffers(const void * arg,bool write_only)515 static void v4l_print_create_buffers(const void *arg, bool write_only)
516 {
517 const struct v4l2_create_buffers *p = arg;
518
519 pr_cont("index=%d, count=%d, memory=%s, ",
520 p->index, p->count,
521 prt_names(p->memory, v4l2_memory_names));
522 v4l_print_format(&p->format, write_only);
523 }
524
v4l_print_streamparm(const void * arg,bool write_only)525 static void v4l_print_streamparm(const void *arg, bool write_only)
526 {
527 const struct v4l2_streamparm *p = arg;
528
529 pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
530
531 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
532 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
533 const struct v4l2_captureparm *c = &p->parm.capture;
534
535 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
536 c->capability, c->capturemode,
537 c->timeperframe.numerator, c->timeperframe.denominator,
538 c->extendedmode, c->readbuffers);
539 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
540 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
541 const struct v4l2_outputparm *c = &p->parm.output;
542
543 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
544 c->capability, c->outputmode,
545 c->timeperframe.numerator, c->timeperframe.denominator,
546 c->extendedmode, c->writebuffers);
547 } else {
548 pr_cont("\n");
549 }
550 }
551
v4l_print_queryctrl(const void * arg,bool write_only)552 static void v4l_print_queryctrl(const void *arg, bool write_only)
553 {
554 const struct v4l2_queryctrl *p = arg;
555
556 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
557 p->id, p->type, (int)sizeof(p->name), p->name,
558 p->minimum, p->maximum,
559 p->step, p->default_value, p->flags);
560 }
561
v4l_print_query_ext_ctrl(const void * arg,bool write_only)562 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
563 {
564 const struct v4l2_query_ext_ctrl *p = arg;
565
566 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",
567 p->id, p->type, (int)sizeof(p->name), p->name,
568 p->minimum, p->maximum,
569 p->step, p->default_value, p->flags,
570 p->elem_size, p->elems, p->nr_of_dims,
571 p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
572 }
573
v4l_print_querymenu(const void * arg,bool write_only)574 static void v4l_print_querymenu(const void *arg, bool write_only)
575 {
576 const struct v4l2_querymenu *p = arg;
577
578 pr_cont("id=0x%x, index=%d\n", p->id, p->index);
579 }
580
v4l_print_control(const void * arg,bool write_only)581 static void v4l_print_control(const void *arg, bool write_only)
582 {
583 const struct v4l2_control *p = arg;
584
585 pr_cont("id=0x%x, value=%d\n", p->id, p->value);
586 }
587
v4l_print_ext_controls(const void * arg,bool write_only)588 static void v4l_print_ext_controls(const void *arg, bool write_only)
589 {
590 const struct v4l2_ext_controls *p = arg;
591 int i;
592
593 pr_cont("which=0x%x, count=%d, error_idx=%d",
594 p->which, p->count, p->error_idx);
595 for (i = 0; i < p->count; i++) {
596 if (!p->controls[i].size)
597 pr_cont(", id/val=0x%x/0x%x",
598 p->controls[i].id, p->controls[i].value);
599 else
600 pr_cont(", id/size=0x%x/%u",
601 p->controls[i].id, p->controls[i].size);
602 }
603 pr_cont("\n");
604 }
605
v4l_print_cropcap(const void * arg,bool write_only)606 static void v4l_print_cropcap(const void *arg, bool write_only)
607 {
608 const struct v4l2_cropcap *p = arg;
609
610 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
611 prt_names(p->type, v4l2_type_names),
612 p->bounds.width, p->bounds.height,
613 p->bounds.left, p->bounds.top,
614 p->defrect.width, p->defrect.height,
615 p->defrect.left, p->defrect.top,
616 p->pixelaspect.numerator, p->pixelaspect.denominator);
617 }
618
v4l_print_crop(const void * arg,bool write_only)619 static void v4l_print_crop(const void *arg, bool write_only)
620 {
621 const struct v4l2_crop *p = arg;
622
623 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
624 prt_names(p->type, v4l2_type_names),
625 p->c.width, p->c.height,
626 p->c.left, p->c.top);
627 }
628
v4l_print_selection(const void * arg,bool write_only)629 static void v4l_print_selection(const void *arg, bool write_only)
630 {
631 const struct v4l2_selection *p = arg;
632
633 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
634 prt_names(p->type, v4l2_type_names),
635 p->target, p->flags,
636 p->r.width, p->r.height, p->r.left, p->r.top);
637 }
638
v4l_print_jpegcompression(const void * arg,bool write_only)639 static void v4l_print_jpegcompression(const void *arg, bool write_only)
640 {
641 const struct v4l2_jpegcompression *p = arg;
642
643 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
644 p->quality, p->APPn, p->APP_len,
645 p->COM_len, p->jpeg_markers);
646 }
647
v4l_print_enc_idx(const void * arg,bool write_only)648 static void v4l_print_enc_idx(const void *arg, bool write_only)
649 {
650 const struct v4l2_enc_idx *p = arg;
651
652 pr_cont("entries=%d, entries_cap=%d\n",
653 p->entries, p->entries_cap);
654 }
655
v4l_print_encoder_cmd(const void * arg,bool write_only)656 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
657 {
658 const struct v4l2_encoder_cmd *p = arg;
659
660 pr_cont("cmd=%d, flags=0x%x\n",
661 p->cmd, p->flags);
662 }
663
v4l_print_decoder_cmd(const void * arg,bool write_only)664 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
665 {
666 const struct v4l2_decoder_cmd *p = arg;
667
668 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
669
670 if (p->cmd == V4L2_DEC_CMD_START)
671 pr_info("speed=%d, format=%u\n",
672 p->start.speed, p->start.format);
673 else if (p->cmd == V4L2_DEC_CMD_STOP)
674 pr_info("pts=%llu\n", p->stop.pts);
675 }
676
v4l_print_dbg_chip_info(const void * arg,bool write_only)677 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
678 {
679 const struct v4l2_dbg_chip_info *p = arg;
680
681 pr_cont("type=%u, ", p->match.type);
682 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
683 pr_cont("name=%.*s, ",
684 (int)sizeof(p->match.name), p->match.name);
685 else
686 pr_cont("addr=%u, ", p->match.addr);
687 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
688 }
689
v4l_print_dbg_register(const void * arg,bool write_only)690 static void v4l_print_dbg_register(const void *arg, bool write_only)
691 {
692 const struct v4l2_dbg_register *p = arg;
693
694 pr_cont("type=%u, ", p->match.type);
695 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
696 pr_cont("name=%.*s, ",
697 (int)sizeof(p->match.name), p->match.name);
698 else
699 pr_cont("addr=%u, ", p->match.addr);
700 pr_cont("reg=0x%llx, val=0x%llx\n",
701 p->reg, p->val);
702 }
703
v4l_print_dv_timings(const void * arg,bool write_only)704 static void v4l_print_dv_timings(const void *arg, bool write_only)
705 {
706 const struct v4l2_dv_timings *p = arg;
707
708 switch (p->type) {
709 case V4L2_DV_BT_656_1120:
710 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",
711 p->bt.interlaced, p->bt.pixelclock,
712 p->bt.width, p->bt.height,
713 p->bt.polarities, p->bt.hfrontporch,
714 p->bt.hsync, p->bt.hbackporch,
715 p->bt.vfrontporch, p->bt.vsync,
716 p->bt.vbackporch, p->bt.il_vfrontporch,
717 p->bt.il_vsync, p->bt.il_vbackporch,
718 p->bt.standards, p->bt.flags);
719 break;
720 default:
721 pr_cont("type=%d\n", p->type);
722 break;
723 }
724 }
725
v4l_print_enum_dv_timings(const void * arg,bool write_only)726 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
727 {
728 const struct v4l2_enum_dv_timings *p = arg;
729
730 pr_cont("index=%u, ", p->index);
731 v4l_print_dv_timings(&p->timings, write_only);
732 }
733
v4l_print_dv_timings_cap(const void * arg,bool write_only)734 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
735 {
736 const struct v4l2_dv_timings_cap *p = arg;
737
738 switch (p->type) {
739 case V4L2_DV_BT_656_1120:
740 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
741 p->bt.min_width, p->bt.max_width,
742 p->bt.min_height, p->bt.max_height,
743 p->bt.min_pixelclock, p->bt.max_pixelclock,
744 p->bt.standards, p->bt.capabilities);
745 break;
746 default:
747 pr_cont("type=%u\n", p->type);
748 break;
749 }
750 }
751
v4l_print_frmsizeenum(const void * arg,bool write_only)752 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
753 {
754 const struct v4l2_frmsizeenum *p = arg;
755
756 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
757 p->index,
758 (p->pixel_format & 0xff),
759 (p->pixel_format >> 8) & 0xff,
760 (p->pixel_format >> 16) & 0xff,
761 (p->pixel_format >> 24) & 0xff,
762 p->type);
763 switch (p->type) {
764 case V4L2_FRMSIZE_TYPE_DISCRETE:
765 pr_cont(", wxh=%ux%u\n",
766 p->discrete.width, p->discrete.height);
767 break;
768 case V4L2_FRMSIZE_TYPE_STEPWISE:
769 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
770 p->stepwise.min_width,
771 p->stepwise.min_height,
772 p->stepwise.max_width,
773 p->stepwise.max_height,
774 p->stepwise.step_width,
775 p->stepwise.step_height);
776 break;
777 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
778 /* fall through */
779 default:
780 pr_cont("\n");
781 break;
782 }
783 }
784
v4l_print_frmivalenum(const void * arg,bool write_only)785 static void v4l_print_frmivalenum(const void *arg, bool write_only)
786 {
787 const struct v4l2_frmivalenum *p = arg;
788
789 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
790 p->index,
791 (p->pixel_format & 0xff),
792 (p->pixel_format >> 8) & 0xff,
793 (p->pixel_format >> 16) & 0xff,
794 (p->pixel_format >> 24) & 0xff,
795 p->width, p->height, p->type);
796 switch (p->type) {
797 case V4L2_FRMIVAL_TYPE_DISCRETE:
798 pr_cont(", fps=%d/%d\n",
799 p->discrete.numerator,
800 p->discrete.denominator);
801 break;
802 case V4L2_FRMIVAL_TYPE_STEPWISE:
803 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
804 p->stepwise.min.numerator,
805 p->stepwise.min.denominator,
806 p->stepwise.max.numerator,
807 p->stepwise.max.denominator,
808 p->stepwise.step.numerator,
809 p->stepwise.step.denominator);
810 break;
811 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
812 /* fall through */
813 default:
814 pr_cont("\n");
815 break;
816 }
817 }
818
v4l_print_event(const void * arg,bool write_only)819 static void v4l_print_event(const void *arg, bool write_only)
820 {
821 const struct v4l2_event *p = arg;
822 const struct v4l2_event_ctrl *c;
823
824 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
825 p->type, p->pending, p->sequence, p->id,
826 p->timestamp.tv_sec, p->timestamp.tv_nsec);
827 switch (p->type) {
828 case V4L2_EVENT_VSYNC:
829 printk(KERN_DEBUG "field=%s\n",
830 prt_names(p->u.vsync.field, v4l2_field_names));
831 break;
832 case V4L2_EVENT_CTRL:
833 c = &p->u.ctrl;
834 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
835 c->changes, c->type);
836 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
837 pr_cont("value64=%lld, ", c->value64);
838 else
839 pr_cont("value=%d, ", c->value);
840 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
841 c->flags, c->minimum, c->maximum,
842 c->step, c->default_value);
843 break;
844 case V4L2_EVENT_FRAME_SYNC:
845 pr_cont("frame_sequence=%u\n",
846 p->u.frame_sync.frame_sequence);
847 break;
848 }
849 }
850
v4l_print_event_subscription(const void * arg,bool write_only)851 static void v4l_print_event_subscription(const void *arg, bool write_only)
852 {
853 const struct v4l2_event_subscription *p = arg;
854
855 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
856 p->type, p->id, p->flags);
857 }
858
v4l_print_sliced_vbi_cap(const void * arg,bool write_only)859 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
860 {
861 const struct v4l2_sliced_vbi_cap *p = arg;
862 int i;
863
864 pr_cont("type=%s, service_set=0x%08x\n",
865 prt_names(p->type, v4l2_type_names), p->service_set);
866 for (i = 0; i < 24; i++)
867 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
868 p->service_lines[0][i],
869 p->service_lines[1][i]);
870 }
871
v4l_print_freq_band(const void * arg,bool write_only)872 static void v4l_print_freq_band(const void *arg, bool write_only)
873 {
874 const struct v4l2_frequency_band *p = arg;
875
876 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
877 p->tuner, p->type, p->index,
878 p->capability, p->rangelow,
879 p->rangehigh, p->modulation);
880 }
881
v4l_print_edid(const void * arg,bool write_only)882 static void v4l_print_edid(const void *arg, bool write_only)
883 {
884 const struct v4l2_edid *p = arg;
885
886 pr_cont("pad=%u, start_block=%u, blocks=%u\n",
887 p->pad, p->start_block, p->blocks);
888 }
889
v4l_print_u32(const void * arg,bool write_only)890 static void v4l_print_u32(const void *arg, bool write_only)
891 {
892 pr_cont("value=%u\n", *(const u32 *)arg);
893 }
894
v4l_print_newline(const void * arg,bool write_only)895 static void v4l_print_newline(const void *arg, bool write_only)
896 {
897 pr_cont("\n");
898 }
899
v4l_print_default(const void * arg,bool write_only)900 static void v4l_print_default(const void *arg, bool write_only)
901 {
902 pr_cont("driver-specific ioctl\n");
903 }
904
check_ext_ctrls(struct v4l2_ext_controls * c,int allow_priv)905 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
906 {
907 __u32 i;
908
909 /* zero the reserved fields */
910 c->reserved[0] = c->reserved[1] = 0;
911 for (i = 0; i < c->count; i++)
912 c->controls[i].reserved2[0] = 0;
913
914 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
915 when using extended controls.
916 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
917 is it allowed for backwards compatibility.
918 */
919 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
920 return 0;
921 if (!c->which)
922 return 1;
923 /* Check that all controls are from the same control class. */
924 for (i = 0; i < c->count; i++) {
925 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
926 c->error_idx = i;
927 return 0;
928 }
929 }
930 return 1;
931 }
932
check_fmt(struct file * file,enum v4l2_buf_type type)933 static int check_fmt(struct file *file, enum v4l2_buf_type type)
934 {
935 struct video_device *vfd = video_devdata(file);
936 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
937 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
938 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
939 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
940 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
941 bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
942 bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
943
944 if (ops == NULL)
945 return -EINVAL;
946
947 switch (type) {
948 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
949 if ((is_vid || is_tch) && is_rx &&
950 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
951 return 0;
952 break;
953 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
954 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
955 return 0;
956 break;
957 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
958 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
959 return 0;
960 break;
961 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
962 if (is_vid && is_tx &&
963 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
964 return 0;
965 break;
966 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
967 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
968 return 0;
969 break;
970 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
971 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
972 return 0;
973 break;
974 case V4L2_BUF_TYPE_VBI_CAPTURE:
975 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
976 return 0;
977 break;
978 case V4L2_BUF_TYPE_VBI_OUTPUT:
979 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
980 return 0;
981 break;
982 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
983 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
984 return 0;
985 break;
986 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
987 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
988 return 0;
989 break;
990 case V4L2_BUF_TYPE_SDR_CAPTURE:
991 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
992 return 0;
993 break;
994 case V4L2_BUF_TYPE_SDR_OUTPUT:
995 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
996 return 0;
997 break;
998 case V4L2_BUF_TYPE_META_CAPTURE:
999 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap)
1000 return 0;
1001 break;
1002 default:
1003 break;
1004 }
1005 return -EINVAL;
1006 }
1007
v4l_sanitize_format(struct v4l2_format * fmt)1008 static void v4l_sanitize_format(struct v4l2_format *fmt)
1009 {
1010 unsigned int offset;
1011
1012 /*
1013 * The v4l2_pix_format structure has been extended with fields that were
1014 * not previously required to be set to zero by applications. The priv
1015 * field, when set to a magic value, indicates the the extended fields
1016 * are valid. Otherwise they will contain undefined values. To simplify
1017 * the API towards drivers zero the extended fields and set the priv
1018 * field to the magic value when the extended pixel format structure
1019 * isn't used by applications.
1020 */
1021
1022 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1023 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1024 return;
1025
1026 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
1027 return;
1028
1029 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1030
1031 offset = offsetof(struct v4l2_pix_format, priv)
1032 + sizeof(fmt->fmt.pix.priv);
1033 memset(((void *)&fmt->fmt.pix) + offset, 0,
1034 sizeof(fmt->fmt.pix) - offset);
1035 }
1036
v4l_querycap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1037 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
1038 struct file *file, void *fh, void *arg)
1039 {
1040 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
1041 struct video_device *vfd = video_devdata(file);
1042 int ret;
1043
1044 cap->version = LINUX_VERSION_CODE;
1045 cap->device_caps = vfd->device_caps;
1046 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
1047
1048 ret = ops->vidioc_querycap(file, fh, cap);
1049
1050 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
1051 /*
1052 * Drivers MUST fill in device_caps, so check for this and
1053 * warn if it was forgotten.
1054 */
1055 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
1056 !cap->device_caps, "Bad caps for driver %s, %x %x",
1057 cap->driver, cap->capabilities, cap->device_caps);
1058 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
1059
1060 return ret;
1061 }
1062
v4l_s_input(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1063 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
1064 struct file *file, void *fh, void *arg)
1065 {
1066 struct video_device *vfd = video_devdata(file);
1067 int ret;
1068
1069 ret = v4l_enable_media_source(vfd);
1070 if (ret)
1071 return ret;
1072 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
1073 }
1074
v4l_s_output(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1075 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
1076 struct file *file, void *fh, void *arg)
1077 {
1078 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
1079 }
1080
v4l_g_priority(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1081 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
1082 struct file *file, void *fh, void *arg)
1083 {
1084 struct video_device *vfd;
1085 u32 *p = arg;
1086
1087 vfd = video_devdata(file);
1088 *p = v4l2_prio_max(vfd->prio);
1089 return 0;
1090 }
1091
v4l_s_priority(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1092 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
1093 struct file *file, void *fh, void *arg)
1094 {
1095 struct video_device *vfd;
1096 struct v4l2_fh *vfh;
1097 u32 *p = arg;
1098
1099 vfd = video_devdata(file);
1100 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
1101 return -ENOTTY;
1102 vfh = file->private_data;
1103 return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
1104 }
1105
v4l_enuminput(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1106 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1107 struct file *file, void *fh, void *arg)
1108 {
1109 struct video_device *vfd = video_devdata(file);
1110 struct v4l2_input *p = arg;
1111
1112 /*
1113 * We set the flags for CAP_DV_TIMINGS &
1114 * CAP_STD here based on ioctl handler provided by the
1115 * driver. If the driver doesn't support these
1116 * for a specific input, it must override these flags.
1117 */
1118 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1119 p->capabilities |= V4L2_IN_CAP_STD;
1120
1121 return ops->vidioc_enum_input(file, fh, p);
1122 }
1123
v4l_enumoutput(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1124 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1125 struct file *file, void *fh, void *arg)
1126 {
1127 struct video_device *vfd = video_devdata(file);
1128 struct v4l2_output *p = arg;
1129
1130 /*
1131 * We set the flags for CAP_DV_TIMINGS &
1132 * CAP_STD here based on ioctl handler provided by the
1133 * driver. If the driver doesn't support these
1134 * for a specific output, it must override these flags.
1135 */
1136 if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1137 p->capabilities |= V4L2_OUT_CAP_STD;
1138
1139 return ops->vidioc_enum_output(file, fh, p);
1140 }
1141
v4l_fill_fmtdesc(struct v4l2_fmtdesc * fmt)1142 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
1143 {
1144 const unsigned sz = sizeof(fmt->description);
1145 const char *descr = NULL;
1146 u32 flags = 0;
1147
1148 /*
1149 * We depart from the normal coding style here since the descriptions
1150 * should be aligned so it is easy to see which descriptions will be
1151 * longer than 31 characters (the max length for a description).
1152 * And frankly, this is easier to read anyway.
1153 *
1154 * Note that gcc will use O(log N) comparisons to find the right case.
1155 */
1156 switch (fmt->pixelformat) {
1157 /* Max description length mask: descr = "0123456789012345678901234567890" */
1158 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
1159 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
1160 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
1161 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
1162 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
1163 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
1164 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
1165 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
1166 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
1167 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
1168 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
1169 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
1170 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
1171 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
1172 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
1173 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
1174 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
1175 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
1176 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
1177 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
1178 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
1179 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
1180 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
1181 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
1182 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
1183 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
1184 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
1185 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
1186 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
1187 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
1188 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
1189 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
1190 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
1191 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
1192 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
1193 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
1194 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
1195 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
1196 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
1197 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
1198 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
1199 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
1200 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
1201 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
1202 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
1203 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
1204 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
1205 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
1206 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
1207 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
1208 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
1209 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
1210 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
1211 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
1212 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
1213 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break;
1214 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break;
1215 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break;
1216 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break;
1217 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break;
1218 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break;
1219 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break;
1220 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break;
1221 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break;
1222 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break;
1223 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
1224 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
1225 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
1226 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
1227 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
1228 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
1229 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
1230 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
1231 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
1232 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
1233 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
1234 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
1235 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
1236 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
1237 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
1238 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
1239 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
1240 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
1241 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
1242 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
1243 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
1244 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
1245 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
1246 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
1247 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
1248 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
1249 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
1250 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
1251 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
1252 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
1253 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
1254 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
1255 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
1256 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
1257 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
1258 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
1259 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
1260 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
1261 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
1262 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
1263 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
1264 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
1265 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
1266 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
1267 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
1268 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
1269 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
1270 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
1271 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
1272 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
1273 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
1274 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
1275 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
1276 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
1277 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
1278 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
1279 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
1280 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
1281 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
1282 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
1283 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
1284 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
1285 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
1286 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
1287 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
1288 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
1289 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break;
1290 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break;
1291 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break;
1292 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break;
1293 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
1294 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
1295 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break;
1296
1297 default:
1298 /* Compressed formats */
1299 flags = V4L2_FMT_FLAG_COMPRESSED;
1300 switch (fmt->pixelformat) {
1301 /* Max description length mask: descr = "0123456789012345678901234567890" */
1302 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
1303 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
1304 case V4L2_PIX_FMT_DV: descr = "1394"; break;
1305 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
1306 case V4L2_PIX_FMT_H264: descr = "H.264"; break;
1307 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
1308 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
1309 case V4L2_PIX_FMT_H263: descr = "H.263"; break;
1310 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
1311 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
1312 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break;
1313 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
1314 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
1315 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
1316 case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
1317 case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
1318 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
1319 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
1320 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
1321 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
1322 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
1323 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
1324 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
1325 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
1326 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
1327 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
1328 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
1329 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
1330 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
1331 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
1332 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
1333 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
1334 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
1335 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
1336 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
1337 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
1338 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
1339 default:
1340 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
1341 if (fmt->description[0])
1342 return;
1343 flags = 0;
1344 snprintf(fmt->description, sz, "%c%c%c%c%s",
1345 (char)(fmt->pixelformat & 0x7f),
1346 (char)((fmt->pixelformat >> 8) & 0x7f),
1347 (char)((fmt->pixelformat >> 16) & 0x7f),
1348 (char)((fmt->pixelformat >> 24) & 0x7f),
1349 (fmt->pixelformat & (1 << 31)) ? "-BE" : "");
1350 break;
1351 }
1352 }
1353
1354 if (descr)
1355 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
1356 fmt->flags = flags;
1357 }
1358
v4l_enum_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1359 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1360 struct file *file, void *fh, void *arg)
1361 {
1362 struct v4l2_fmtdesc *p = arg;
1363 int ret = check_fmt(file, p->type);
1364
1365 if (ret)
1366 return ret;
1367 ret = -EINVAL;
1368
1369 switch (p->type) {
1370 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1371 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1372 break;
1373 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1374 break;
1375 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1376 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1377 break;
1378 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1379 break;
1380 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1381 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1382 break;
1383 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1384 break;
1385 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1386 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1387 break;
1388 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1389 break;
1390 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1391 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1392 break;
1393 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1394 break;
1395 case V4L2_BUF_TYPE_SDR_CAPTURE:
1396 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
1397 break;
1398 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
1399 break;
1400 case V4L2_BUF_TYPE_SDR_OUTPUT:
1401 if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
1402 break;
1403 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
1404 break;
1405 case V4L2_BUF_TYPE_META_CAPTURE:
1406 if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
1407 break;
1408 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
1409 break;
1410 }
1411 if (ret == 0)
1412 v4l_fill_fmtdesc(p);
1413 return ret;
1414 }
1415
v4l_g_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1416 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1417 struct file *file, void *fh, void *arg)
1418 {
1419 struct v4l2_format *p = arg;
1420 int ret = check_fmt(file, p->type);
1421
1422 if (ret)
1423 return ret;
1424
1425 /*
1426 * fmt can't be cleared for these overlay types due to the 'clips'
1427 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
1428 * Those are provided by the user. So handle these two overlay types
1429 * first, and then just do a simple memset for the other types.
1430 */
1431 switch (p->type) {
1432 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1433 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
1434 struct v4l2_clip __user *clips = p->fmt.win.clips;
1435 u32 clipcount = p->fmt.win.clipcount;
1436 void __user *bitmap = p->fmt.win.bitmap;
1437
1438 memset(&p->fmt, 0, sizeof(p->fmt));
1439 p->fmt.win.clips = clips;
1440 p->fmt.win.clipcount = clipcount;
1441 p->fmt.win.bitmap = bitmap;
1442 break;
1443 }
1444 default:
1445 memset(&p->fmt, 0, sizeof(p->fmt));
1446 break;
1447 }
1448
1449 switch (p->type) {
1450 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1451 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1452 break;
1453 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1454 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1455 /* just in case the driver zeroed it again */
1456 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1457 return ret;
1458 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1459 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1460 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1461 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1462 case V4L2_BUF_TYPE_VBI_CAPTURE:
1463 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1464 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1465 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1466 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1467 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1468 break;
1469 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1470 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
1471 /* just in case the driver zeroed it again */
1472 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1473 return ret;
1474 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1475 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1476 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1477 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1478 case V4L2_BUF_TYPE_VBI_OUTPUT:
1479 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1480 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1481 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1482 case V4L2_BUF_TYPE_SDR_CAPTURE:
1483 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
1484 case V4L2_BUF_TYPE_SDR_OUTPUT:
1485 return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
1486 case V4L2_BUF_TYPE_META_CAPTURE:
1487 return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
1488 }
1489 return -EINVAL;
1490 }
1491
v4l_pix_format_touch(struct v4l2_pix_format * p)1492 static void v4l_pix_format_touch(struct v4l2_pix_format *p)
1493 {
1494 /*
1495 * The v4l2_pix_format structure contains fields that make no sense for
1496 * touch. Set them to default values in this case.
1497 */
1498
1499 p->field = V4L2_FIELD_NONE;
1500 p->colorspace = V4L2_COLORSPACE_RAW;
1501 p->flags = 0;
1502 p->ycbcr_enc = 0;
1503 p->quantization = 0;
1504 p->xfer_func = 0;
1505 }
1506
v4l_s_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1507 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1508 struct file *file, void *fh, void *arg)
1509 {
1510 struct v4l2_format *p = arg;
1511 struct video_device *vfd = video_devdata(file);
1512 int ret = check_fmt(file, p->type);
1513
1514 if (ret)
1515 return ret;
1516
1517 ret = v4l_enable_media_source(vfd);
1518 if (ret)
1519 return ret;
1520 v4l_sanitize_format(p);
1521
1522 switch (p->type) {
1523 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1524 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1525 break;
1526 CLEAR_AFTER_FIELD(p, fmt.pix);
1527 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1528 /* just in case the driver zeroed it again */
1529 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1530 if (vfd->vfl_type == VFL_TYPE_TOUCH)
1531 v4l_pix_format_touch(&p->fmt.pix);
1532 return ret;
1533 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1534 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1535 break;
1536 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1537 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1538 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1539 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1540 break;
1541 CLEAR_AFTER_FIELD(p, fmt.win);
1542 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1543 case V4L2_BUF_TYPE_VBI_CAPTURE:
1544 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1545 break;
1546 CLEAR_AFTER_FIELD(p, fmt.vbi);
1547 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1548 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1549 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1550 break;
1551 CLEAR_AFTER_FIELD(p, fmt.sliced);
1552 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1553 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1554 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1555 break;
1556 CLEAR_AFTER_FIELD(p, fmt.pix);
1557 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
1558 /* just in case the driver zeroed it again */
1559 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1560 return ret;
1561 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1562 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1563 break;
1564 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1565 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1566 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1567 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1568 break;
1569 CLEAR_AFTER_FIELD(p, fmt.win);
1570 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1571 case V4L2_BUF_TYPE_VBI_OUTPUT:
1572 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1573 break;
1574 CLEAR_AFTER_FIELD(p, fmt.vbi);
1575 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1576 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1577 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1578 break;
1579 CLEAR_AFTER_FIELD(p, fmt.sliced);
1580 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1581 case V4L2_BUF_TYPE_SDR_CAPTURE:
1582 if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
1583 break;
1584 CLEAR_AFTER_FIELD(p, fmt.sdr);
1585 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
1586 case V4L2_BUF_TYPE_SDR_OUTPUT:
1587 if (unlikely(!ops->vidioc_s_fmt_sdr_out))
1588 break;
1589 CLEAR_AFTER_FIELD(p, fmt.sdr);
1590 return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
1591 case V4L2_BUF_TYPE_META_CAPTURE:
1592 if (unlikely(!ops->vidioc_s_fmt_meta_cap))
1593 break;
1594 CLEAR_AFTER_FIELD(p, fmt.meta);
1595 return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
1596 }
1597 return -EINVAL;
1598 }
1599
v4l_try_fmt(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1600 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1601 struct file *file, void *fh, void *arg)
1602 {
1603 struct v4l2_format *p = arg;
1604 int ret = check_fmt(file, p->type);
1605
1606 if (ret)
1607 return ret;
1608
1609 v4l_sanitize_format(p);
1610
1611 switch (p->type) {
1612 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1613 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1614 break;
1615 CLEAR_AFTER_FIELD(p, fmt.pix);
1616 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1617 /* just in case the driver zeroed it again */
1618 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1619 return ret;
1620 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1621 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1622 break;
1623 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1624 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1625 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1626 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1627 break;
1628 CLEAR_AFTER_FIELD(p, fmt.win);
1629 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1630 case V4L2_BUF_TYPE_VBI_CAPTURE:
1631 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1632 break;
1633 CLEAR_AFTER_FIELD(p, fmt.vbi);
1634 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1635 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1636 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1637 break;
1638 CLEAR_AFTER_FIELD(p, fmt.sliced);
1639 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1640 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1641 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1642 break;
1643 CLEAR_AFTER_FIELD(p, fmt.pix);
1644 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
1645 /* just in case the driver zeroed it again */
1646 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1647 return ret;
1648 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1649 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1650 break;
1651 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
1652 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1653 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1654 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1655 break;
1656 CLEAR_AFTER_FIELD(p, fmt.win);
1657 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1658 case V4L2_BUF_TYPE_VBI_OUTPUT:
1659 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1660 break;
1661 CLEAR_AFTER_FIELD(p, fmt.vbi);
1662 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1663 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1664 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1665 break;
1666 CLEAR_AFTER_FIELD(p, fmt.sliced);
1667 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1668 case V4L2_BUF_TYPE_SDR_CAPTURE:
1669 if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
1670 break;
1671 CLEAR_AFTER_FIELD(p, fmt.sdr);
1672 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
1673 case V4L2_BUF_TYPE_SDR_OUTPUT:
1674 if (unlikely(!ops->vidioc_try_fmt_sdr_out))
1675 break;
1676 CLEAR_AFTER_FIELD(p, fmt.sdr);
1677 return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
1678 case V4L2_BUF_TYPE_META_CAPTURE:
1679 if (unlikely(!ops->vidioc_try_fmt_meta_cap))
1680 break;
1681 CLEAR_AFTER_FIELD(p, fmt.meta);
1682 return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
1683 }
1684 return -EINVAL;
1685 }
1686
v4l_streamon(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1687 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1688 struct file *file, void *fh, void *arg)
1689 {
1690 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1691 }
1692
v4l_streamoff(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1693 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1694 struct file *file, void *fh, void *arg)
1695 {
1696 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1697 }
1698
v4l_g_tuner(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1699 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1700 struct file *file, void *fh, void *arg)
1701 {
1702 struct video_device *vfd = video_devdata(file);
1703 struct v4l2_tuner *p = arg;
1704 int err;
1705
1706 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1707 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1708 err = ops->vidioc_g_tuner(file, fh, p);
1709 if (!err)
1710 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1711 return err;
1712 }
1713
v4l_s_tuner(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1714 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1715 struct file *file, void *fh, void *arg)
1716 {
1717 struct video_device *vfd = video_devdata(file);
1718 struct v4l2_tuner *p = arg;
1719 int ret;
1720
1721 ret = v4l_enable_media_source(vfd);
1722 if (ret)
1723 return ret;
1724 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1725 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1726 return ops->vidioc_s_tuner(file, fh, p);
1727 }
1728
v4l_g_modulator(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1729 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1730 struct file *file, void *fh, void *arg)
1731 {
1732 struct video_device *vfd = video_devdata(file);
1733 struct v4l2_modulator *p = arg;
1734 int err;
1735
1736 if (vfd->vfl_type == VFL_TYPE_RADIO)
1737 p->type = V4L2_TUNER_RADIO;
1738
1739 err = ops->vidioc_g_modulator(file, fh, p);
1740 if (!err)
1741 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1742 return err;
1743 }
1744
v4l_s_modulator(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1745 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
1746 struct file *file, void *fh, void *arg)
1747 {
1748 struct video_device *vfd = video_devdata(file);
1749 struct v4l2_modulator *p = arg;
1750
1751 if (vfd->vfl_type == VFL_TYPE_RADIO)
1752 p->type = V4L2_TUNER_RADIO;
1753
1754 return ops->vidioc_s_modulator(file, fh, p);
1755 }
1756
v4l_g_frequency(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1757 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1758 struct file *file, void *fh, void *arg)
1759 {
1760 struct video_device *vfd = video_devdata(file);
1761 struct v4l2_frequency *p = arg;
1762
1763 if (vfd->vfl_type == VFL_TYPE_SDR)
1764 p->type = V4L2_TUNER_SDR;
1765 else
1766 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1767 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1768 return ops->vidioc_g_frequency(file, fh, p);
1769 }
1770
v4l_s_frequency(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1771 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1772 struct file *file, void *fh, void *arg)
1773 {
1774 struct video_device *vfd = video_devdata(file);
1775 const struct v4l2_frequency *p = arg;
1776 enum v4l2_tuner_type type;
1777 int ret;
1778
1779 ret = v4l_enable_media_source(vfd);
1780 if (ret)
1781 return ret;
1782 if (vfd->vfl_type == VFL_TYPE_SDR) {
1783 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
1784 return -EINVAL;
1785 } else {
1786 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1787 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1788 if (type != p->type)
1789 return -EINVAL;
1790 }
1791 return ops->vidioc_s_frequency(file, fh, p);
1792 }
1793
v4l_enumstd(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1794 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1795 struct file *file, void *fh, void *arg)
1796 {
1797 struct video_device *vfd = video_devdata(file);
1798 struct v4l2_standard *p = arg;
1799
1800 return v4l_video_std_enumstd(p, vfd->tvnorms);
1801 }
1802
v4l_s_std(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1803 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1804 struct file *file, void *fh, void *arg)
1805 {
1806 struct video_device *vfd = video_devdata(file);
1807 v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1808 int ret;
1809
1810 ret = v4l_enable_media_source(vfd);
1811 if (ret)
1812 return ret;
1813 norm = id & vfd->tvnorms;
1814 if (vfd->tvnorms && !norm) /* Check if std is supported */
1815 return -EINVAL;
1816
1817 /* Calls the specific handler */
1818 return ops->vidioc_s_std(file, fh, norm);
1819 }
1820
v4l_querystd(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1821 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1822 struct file *file, void *fh, void *arg)
1823 {
1824 struct video_device *vfd = video_devdata(file);
1825 v4l2_std_id *p = arg;
1826 int ret;
1827
1828 ret = v4l_enable_media_source(vfd);
1829 if (ret)
1830 return ret;
1831 /*
1832 * If no signal is detected, then the driver should return
1833 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
1834 * any standards that do not apply removed.
1835 *
1836 * This means that tuners, audio and video decoders can join
1837 * their efforts to improve the standards detection.
1838 */
1839 *p = vfd->tvnorms;
1840 return ops->vidioc_querystd(file, fh, arg);
1841 }
1842
v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1843 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1844 struct file *file, void *fh, void *arg)
1845 {
1846 struct video_device *vfd = video_devdata(file);
1847 struct v4l2_hw_freq_seek *p = arg;
1848 enum v4l2_tuner_type type;
1849 int ret;
1850
1851 ret = v4l_enable_media_source(vfd);
1852 if (ret)
1853 return ret;
1854 /* s_hw_freq_seek is not supported for SDR for now */
1855 if (vfd->vfl_type == VFL_TYPE_SDR)
1856 return -EINVAL;
1857
1858 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1859 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1860 if (p->type != type)
1861 return -EINVAL;
1862 return ops->vidioc_s_hw_freq_seek(file, fh, p);
1863 }
1864
v4l_overlay(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1865 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1866 struct file *file, void *fh, void *arg)
1867 {
1868 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1869 }
1870
v4l_reqbufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1871 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1872 struct file *file, void *fh, void *arg)
1873 {
1874 struct v4l2_requestbuffers *p = arg;
1875 int ret = check_fmt(file, p->type);
1876
1877 if (ret)
1878 return ret;
1879
1880 CLEAR_AFTER_FIELD(p, memory);
1881
1882 return ops->vidioc_reqbufs(file, fh, p);
1883 }
1884
v4l_querybuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1885 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1886 struct file *file, void *fh, void *arg)
1887 {
1888 struct v4l2_buffer *p = arg;
1889 int ret = check_fmt(file, p->type);
1890
1891 return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1892 }
1893
v4l_qbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1894 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1895 struct file *file, void *fh, void *arg)
1896 {
1897 struct v4l2_buffer *p = arg;
1898 int ret = check_fmt(file, p->type);
1899
1900 return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1901 }
1902
v4l_dqbuf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1903 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1904 struct file *file, void *fh, void *arg)
1905 {
1906 struct v4l2_buffer *p = arg;
1907 int ret = check_fmt(file, p->type);
1908
1909 return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1910 }
1911
v4l_create_bufs(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1912 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1913 struct file *file, void *fh, void *arg)
1914 {
1915 struct v4l2_create_buffers *create = arg;
1916 int ret = check_fmt(file, create->format.type);
1917
1918 if (ret)
1919 return ret;
1920
1921 CLEAR_AFTER_FIELD(create, format);
1922
1923 v4l_sanitize_format(&create->format);
1924
1925 ret = ops->vidioc_create_bufs(file, fh, create);
1926
1927 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1928 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1929 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
1930
1931 return ret;
1932 }
1933
v4l_prepare_buf(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1934 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1935 struct file *file, void *fh, void *arg)
1936 {
1937 struct v4l2_buffer *b = arg;
1938 int ret = check_fmt(file, b->type);
1939
1940 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1941 }
1942
v4l_g_parm(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1943 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1944 struct file *file, void *fh, void *arg)
1945 {
1946 struct v4l2_streamparm *p = arg;
1947 v4l2_std_id std;
1948 int ret = check_fmt(file, p->type);
1949
1950 if (ret)
1951 return ret;
1952 if (ops->vidioc_g_parm)
1953 return ops->vidioc_g_parm(file, fh, p);
1954 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1955 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1956 return -EINVAL;
1957 p->parm.capture.readbuffers = 2;
1958 ret = ops->vidioc_g_std(file, fh, &std);
1959 if (ret == 0)
1960 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
1961 return ret;
1962 }
1963
v4l_s_parm(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1964 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1965 struct file *file, void *fh, void *arg)
1966 {
1967 struct v4l2_streamparm *p = arg;
1968 int ret = check_fmt(file, p->type);
1969
1970 if (ret)
1971 return ret;
1972
1973 /* Note: extendedmode is never used in drivers */
1974 if (V4L2_TYPE_IS_OUTPUT(p->type)) {
1975 memset(p->parm.output.reserved, 0,
1976 sizeof(p->parm.output.reserved));
1977 p->parm.output.extendedmode = 0;
1978 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
1979 } else {
1980 memset(p->parm.capture.reserved, 0,
1981 sizeof(p->parm.capture.reserved));
1982 p->parm.capture.extendedmode = 0;
1983 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
1984 }
1985 return ops->vidioc_s_parm(file, fh, p);
1986 }
1987
v4l_queryctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)1988 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1989 struct file *file, void *fh, void *arg)
1990 {
1991 struct video_device *vfd = video_devdata(file);
1992 struct v4l2_queryctrl *p = arg;
1993 struct v4l2_fh *vfh =
1994 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1995
1996 if (vfh && vfh->ctrl_handler)
1997 return v4l2_queryctrl(vfh->ctrl_handler, p);
1998 if (vfd->ctrl_handler)
1999 return v4l2_queryctrl(vfd->ctrl_handler, p);
2000 if (ops->vidioc_queryctrl)
2001 return ops->vidioc_queryctrl(file, fh, p);
2002 return -ENOTTY;
2003 }
2004
v4l_query_ext_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2005 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
2006 struct file *file, void *fh, void *arg)
2007 {
2008 struct video_device *vfd = video_devdata(file);
2009 struct v4l2_query_ext_ctrl *p = arg;
2010 struct v4l2_fh *vfh =
2011 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2012
2013 if (vfh && vfh->ctrl_handler)
2014 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
2015 if (vfd->ctrl_handler)
2016 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
2017 if (ops->vidioc_query_ext_ctrl)
2018 return ops->vidioc_query_ext_ctrl(file, fh, p);
2019 return -ENOTTY;
2020 }
2021
v4l_querymenu(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2022 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
2023 struct file *file, void *fh, void *arg)
2024 {
2025 struct video_device *vfd = video_devdata(file);
2026 struct v4l2_querymenu *p = arg;
2027 struct v4l2_fh *vfh =
2028 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2029
2030 if (vfh && vfh->ctrl_handler)
2031 return v4l2_querymenu(vfh->ctrl_handler, p);
2032 if (vfd->ctrl_handler)
2033 return v4l2_querymenu(vfd->ctrl_handler, p);
2034 if (ops->vidioc_querymenu)
2035 return ops->vidioc_querymenu(file, fh, p);
2036 return -ENOTTY;
2037 }
2038
v4l_g_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2039 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
2040 struct file *file, void *fh, void *arg)
2041 {
2042 struct video_device *vfd = video_devdata(file);
2043 struct v4l2_control *p = arg;
2044 struct v4l2_fh *vfh =
2045 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2046 struct v4l2_ext_controls ctrls;
2047 struct v4l2_ext_control ctrl;
2048
2049 if (vfh && vfh->ctrl_handler)
2050 return v4l2_g_ctrl(vfh->ctrl_handler, p);
2051 if (vfd->ctrl_handler)
2052 return v4l2_g_ctrl(vfd->ctrl_handler, p);
2053 if (ops->vidioc_g_ctrl)
2054 return ops->vidioc_g_ctrl(file, fh, p);
2055 if (ops->vidioc_g_ext_ctrls == NULL)
2056 return -ENOTTY;
2057
2058 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2059 ctrls.count = 1;
2060 ctrls.controls = &ctrl;
2061 ctrl.id = p->id;
2062 ctrl.value = p->value;
2063 if (check_ext_ctrls(&ctrls, 1)) {
2064 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
2065
2066 if (ret == 0)
2067 p->value = ctrl.value;
2068 return ret;
2069 }
2070 return -EINVAL;
2071 }
2072
v4l_s_ctrl(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2073 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
2074 struct file *file, void *fh, void *arg)
2075 {
2076 struct video_device *vfd = video_devdata(file);
2077 struct v4l2_control *p = arg;
2078 struct v4l2_fh *vfh =
2079 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2080 struct v4l2_ext_controls ctrls;
2081 struct v4l2_ext_control ctrl;
2082
2083 if (vfh && vfh->ctrl_handler)
2084 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
2085 if (vfd->ctrl_handler)
2086 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
2087 if (ops->vidioc_s_ctrl)
2088 return ops->vidioc_s_ctrl(file, fh, p);
2089 if (ops->vidioc_s_ext_ctrls == NULL)
2090 return -ENOTTY;
2091
2092 ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
2093 ctrls.count = 1;
2094 ctrls.controls = &ctrl;
2095 ctrl.id = p->id;
2096 ctrl.value = p->value;
2097 if (check_ext_ctrls(&ctrls, 1))
2098 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
2099 return -EINVAL;
2100 }
2101
v4l_g_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2102 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2103 struct file *file, void *fh, void *arg)
2104 {
2105 struct video_device *vfd = video_devdata(file);
2106 struct v4l2_ext_controls *p = arg;
2107 struct v4l2_fh *vfh =
2108 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2109
2110 p->error_idx = p->count;
2111 if (vfh && vfh->ctrl_handler)
2112 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
2113 if (vfd->ctrl_handler)
2114 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
2115 if (ops->vidioc_g_ext_ctrls == NULL)
2116 return -ENOTTY;
2117 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
2118 -EINVAL;
2119 }
2120
v4l_s_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2121 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2122 struct file *file, void *fh, void *arg)
2123 {
2124 struct video_device *vfd = video_devdata(file);
2125 struct v4l2_ext_controls *p = arg;
2126 struct v4l2_fh *vfh =
2127 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2128
2129 p->error_idx = p->count;
2130 if (vfh && vfh->ctrl_handler)
2131 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
2132 if (vfd->ctrl_handler)
2133 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
2134 if (ops->vidioc_s_ext_ctrls == NULL)
2135 return -ENOTTY;
2136 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
2137 -EINVAL;
2138 }
2139
v4l_try_ext_ctrls(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2140 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
2141 struct file *file, void *fh, void *arg)
2142 {
2143 struct video_device *vfd = video_devdata(file);
2144 struct v4l2_ext_controls *p = arg;
2145 struct v4l2_fh *vfh =
2146 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
2147
2148 p->error_idx = p->count;
2149 if (vfh && vfh->ctrl_handler)
2150 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
2151 if (vfd->ctrl_handler)
2152 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
2153 if (ops->vidioc_try_ext_ctrls == NULL)
2154 return -ENOTTY;
2155 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
2156 -EINVAL;
2157 }
2158
2159 /*
2160 * The selection API specified originally that the _MPLANE buffer types
2161 * shouldn't be used. The reasons for this are lost in the mists of time
2162 * (or just really crappy memories). Regardless, this is really annoying
2163 * for userspace. So to keep things simple we map _MPLANE buffer types
2164 * to their 'regular' counterparts before calling the driver. And we
2165 * restore it afterwards. This way applications can use either buffer
2166 * type and drivers don't need to check for both.
2167 */
v4l_g_selection(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2168 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
2169 struct file *file, void *fh, void *arg)
2170 {
2171 struct v4l2_selection *p = arg;
2172 u32 old_type = p->type;
2173 int ret;
2174
2175 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2176 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2177 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2178 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2179 ret = ops->vidioc_g_selection(file, fh, p);
2180 p->type = old_type;
2181 return ret;
2182 }
2183
v4l_s_selection(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2184 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
2185 struct file *file, void *fh, void *arg)
2186 {
2187 struct v4l2_selection *p = arg;
2188 u32 old_type = p->type;
2189 int ret;
2190
2191 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
2192 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2193 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
2194 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
2195 ret = ops->vidioc_s_selection(file, fh, p);
2196 p->type = old_type;
2197 return ret;
2198 }
2199
v4l_g_crop(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2200 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
2201 struct file *file, void *fh, void *arg)
2202 {
2203 struct v4l2_crop *p = arg;
2204 struct v4l2_selection s = {
2205 .type = p->type,
2206 };
2207 int ret;
2208
2209 if (ops->vidioc_g_crop)
2210 return ops->vidioc_g_crop(file, fh, p);
2211 /* simulate capture crop using selection api */
2212
2213 /* crop means compose for output devices */
2214 if (V4L2_TYPE_IS_OUTPUT(p->type))
2215 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2216 else
2217 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2218
2219 ret = v4l_g_selection(ops, file, fh, &s);
2220
2221 /* copying results to old structure on success */
2222 if (!ret)
2223 p->c = s.r;
2224 return ret;
2225 }
2226
v4l_s_crop(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2227 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
2228 struct file *file, void *fh, void *arg)
2229 {
2230 struct v4l2_crop *p = arg;
2231 struct v4l2_selection s = {
2232 .type = p->type,
2233 .r = p->c,
2234 };
2235
2236 if (ops->vidioc_s_crop)
2237 return ops->vidioc_s_crop(file, fh, p);
2238 /* simulate capture crop using selection api */
2239
2240 /* crop means compose for output devices */
2241 if (V4L2_TYPE_IS_OUTPUT(p->type))
2242 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
2243 else
2244 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
2245
2246 return v4l_s_selection(ops, file, fh, &s);
2247 }
2248
v4l_cropcap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2249 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
2250 struct file *file, void *fh, void *arg)
2251 {
2252 struct v4l2_cropcap *p = arg;
2253 struct v4l2_selection s = { .type = p->type };
2254 int ret = 0;
2255
2256 /* setting trivial pixelaspect */
2257 p->pixelaspect.numerator = 1;
2258 p->pixelaspect.denominator = 1;
2259
2260 /*
2261 * The determine_valid_ioctls() call already should ensure
2262 * that this can never happen, but just in case...
2263 */
2264 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
2265 return -ENOTTY;
2266
2267 if (ops->vidioc_cropcap)
2268 ret = ops->vidioc_cropcap(file, fh, p);
2269
2270 if (!ops->vidioc_g_selection)
2271 return ret;
2272
2273 /*
2274 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
2275 * square pixel aspect ratio in that case.
2276 */
2277 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
2278 return ret;
2279
2280 /* Use g_selection() to fill in the bounds and defrect rectangles */
2281
2282 /* obtaining bounds */
2283 if (V4L2_TYPE_IS_OUTPUT(p->type))
2284 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
2285 else
2286 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
2287
2288 ret = v4l_g_selection(ops, file, fh, &s);
2289 if (ret)
2290 return ret;
2291 p->bounds = s.r;
2292
2293 /* obtaining defrect */
2294 if (V4L2_TYPE_IS_OUTPUT(p->type))
2295 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
2296 else
2297 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
2298
2299 ret = v4l_g_selection(ops, file, fh, &s);
2300 if (ret)
2301 return ret;
2302 p->defrect = s.r;
2303
2304 return 0;
2305 }
2306
v4l_log_status(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2307 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
2308 struct file *file, void *fh, void *arg)
2309 {
2310 struct video_device *vfd = video_devdata(file);
2311 int ret;
2312
2313 if (vfd->v4l2_dev)
2314 pr_info("%s: ================= START STATUS =================\n",
2315 vfd->v4l2_dev->name);
2316 ret = ops->vidioc_log_status(file, fh);
2317 if (vfd->v4l2_dev)
2318 pr_info("%s: ================== END STATUS ==================\n",
2319 vfd->v4l2_dev->name);
2320 return ret;
2321 }
2322
v4l_dbg_g_register(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2323 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
2324 struct file *file, void *fh, void *arg)
2325 {
2326 #ifdef CONFIG_VIDEO_ADV_DEBUG
2327 struct v4l2_dbg_register *p = arg;
2328 struct video_device *vfd = video_devdata(file);
2329 struct v4l2_subdev *sd;
2330 int idx = 0;
2331
2332 if (!capable(CAP_SYS_ADMIN))
2333 return -EPERM;
2334 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2335 if (vfd->v4l2_dev == NULL)
2336 return -EINVAL;
2337 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2338 if (p->match.addr == idx++)
2339 return v4l2_subdev_call(sd, core, g_register, p);
2340 return -EINVAL;
2341 }
2342 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2343 (ops->vidioc_g_chip_info || p->match.addr == 0))
2344 return ops->vidioc_g_register(file, fh, p);
2345 return -EINVAL;
2346 #else
2347 return -ENOTTY;
2348 #endif
2349 }
2350
v4l_dbg_s_register(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2351 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
2352 struct file *file, void *fh, void *arg)
2353 {
2354 #ifdef CONFIG_VIDEO_ADV_DEBUG
2355 const struct v4l2_dbg_register *p = arg;
2356 struct video_device *vfd = video_devdata(file);
2357 struct v4l2_subdev *sd;
2358 int idx = 0;
2359
2360 if (!capable(CAP_SYS_ADMIN))
2361 return -EPERM;
2362 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
2363 if (vfd->v4l2_dev == NULL)
2364 return -EINVAL;
2365 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
2366 if (p->match.addr == idx++)
2367 return v4l2_subdev_call(sd, core, s_register, p);
2368 return -EINVAL;
2369 }
2370 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
2371 (ops->vidioc_g_chip_info || p->match.addr == 0))
2372 return ops->vidioc_s_register(file, fh, p);
2373 return -EINVAL;
2374 #else
2375 return -ENOTTY;
2376 #endif
2377 }
2378
v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2379 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
2380 struct file *file, void *fh, void *arg)
2381 {
2382 #ifdef CONFIG_VIDEO_ADV_DEBUG
2383 struct video_device *vfd = video_devdata(file);
2384 struct v4l2_dbg_chip_info *p = arg;
2385 struct v4l2_subdev *sd;
2386 int idx = 0;
2387
2388 switch (p->match.type) {
2389 case V4L2_CHIP_MATCH_BRIDGE:
2390 if (ops->vidioc_s_register)
2391 p->flags |= V4L2_CHIP_FL_WRITABLE;
2392 if (ops->vidioc_g_register)
2393 p->flags |= V4L2_CHIP_FL_READABLE;
2394 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
2395 if (ops->vidioc_g_chip_info)
2396 return ops->vidioc_g_chip_info(file, fh, arg);
2397 if (p->match.addr)
2398 return -EINVAL;
2399 return 0;
2400
2401 case V4L2_CHIP_MATCH_SUBDEV:
2402 if (vfd->v4l2_dev == NULL)
2403 break;
2404 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
2405 if (p->match.addr != idx++)
2406 continue;
2407 if (sd->ops->core && sd->ops->core->s_register)
2408 p->flags |= V4L2_CHIP_FL_WRITABLE;
2409 if (sd->ops->core && sd->ops->core->g_register)
2410 p->flags |= V4L2_CHIP_FL_READABLE;
2411 strlcpy(p->name, sd->name, sizeof(p->name));
2412 return 0;
2413 }
2414 break;
2415 }
2416 return -EINVAL;
2417 #else
2418 return -ENOTTY;
2419 #endif
2420 }
2421
v4l_dqevent(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2422 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
2423 struct file *file, void *fh, void *arg)
2424 {
2425 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
2426 }
2427
v4l_subscribe_event(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2428 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
2429 struct file *file, void *fh, void *arg)
2430 {
2431 return ops->vidioc_subscribe_event(fh, arg);
2432 }
2433
v4l_unsubscribe_event(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2434 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
2435 struct file *file, void *fh, void *arg)
2436 {
2437 return ops->vidioc_unsubscribe_event(fh, arg);
2438 }
2439
v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2440 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
2441 struct file *file, void *fh, void *arg)
2442 {
2443 struct v4l2_sliced_vbi_cap *p = arg;
2444 int ret = check_fmt(file, p->type);
2445
2446 if (ret)
2447 return ret;
2448
2449 /* Clear up to type, everything after type is zeroed already */
2450 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
2451
2452 return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
2453 }
2454
v4l_enum_freq_bands(const struct v4l2_ioctl_ops * ops,struct file * file,void * fh,void * arg)2455 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
2456 struct file *file, void *fh, void *arg)
2457 {
2458 struct video_device *vfd = video_devdata(file);
2459 struct v4l2_frequency_band *p = arg;
2460 enum v4l2_tuner_type type;
2461 int err;
2462
2463 if (vfd->vfl_type == VFL_TYPE_SDR) {
2464 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
2465 return -EINVAL;
2466 type = p->type;
2467 } else {
2468 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
2469 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
2470 if (type != p->type)
2471 return -EINVAL;
2472 }
2473 if (ops->vidioc_enum_freq_bands) {
2474 err = ops->vidioc_enum_freq_bands(file, fh, p);
2475 if (err != -ENOTTY)
2476 return err;
2477 }
2478 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
2479 struct v4l2_tuner t = {
2480 .index = p->tuner,
2481 .type = type,
2482 };
2483
2484 if (p->index)
2485 return -EINVAL;
2486 err = ops->vidioc_g_tuner(file, fh, &t);
2487 if (err)
2488 return err;
2489 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2490 p->rangelow = t.rangelow;
2491 p->rangehigh = t.rangehigh;
2492 p->modulation = (type == V4L2_TUNER_RADIO) ?
2493 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2494 return 0;
2495 }
2496 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
2497 struct v4l2_modulator m = {
2498 .index = p->tuner,
2499 };
2500
2501 if (type != V4L2_TUNER_RADIO)
2502 return -EINVAL;
2503 if (p->index)
2504 return -EINVAL;
2505 err = ops->vidioc_g_modulator(file, fh, &m);
2506 if (err)
2507 return err;
2508 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
2509 p->rangelow = m.rangelow;
2510 p->rangehigh = m.rangehigh;
2511 p->modulation = (type == V4L2_TUNER_RADIO) ?
2512 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
2513 return 0;
2514 }
2515 return -ENOTTY;
2516 }
2517
2518 struct v4l2_ioctl_info {
2519 unsigned int ioctl;
2520 u32 flags;
2521 const char * const name;
2522 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
2523 void *fh, void *p);
2524 void (*debug)(const void *arg, bool write_only);
2525 };
2526
2527 /* This control needs a priority check */
2528 #define INFO_FL_PRIO (1 << 0)
2529 /* This control can be valid if the filehandle passes a control handler. */
2530 #define INFO_FL_CTRL (1 << 1)
2531 /* Queuing ioctl */
2532 #define INFO_FL_QUEUE (1 << 2)
2533 /* Always copy back result, even on error */
2534 #define INFO_FL_ALWAYS_COPY (1 << 3)
2535 /* Zero struct from after the field to the end */
2536 #define INFO_FL_CLEAR(v4l2_struct, field) \
2537 ((offsetof(struct v4l2_struct, field) + \
2538 sizeof(((struct v4l2_struct *)0)->field)) << 16)
2539 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2540
2541 #define DEFINE_V4L_STUB_FUNC(_vidioc) \
2542 static int v4l_stub_ ## _vidioc( \
2543 const struct v4l2_ioctl_ops *ops, \
2544 struct file *file, void *fh, void *p) \
2545 { \
2546 return ops->vidioc_ ## _vidioc(file, fh, p); \
2547 }
2548
2549 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
2550 [_IOC_NR(_ioctl)] = { \
2551 .ioctl = _ioctl, \
2552 .flags = _flags, \
2553 .name = #_ioctl, \
2554 .func = _func, \
2555 .debug = _debug, \
2556 }
2557
2558 DEFINE_V4L_STUB_FUNC(g_fbuf)
2559 DEFINE_V4L_STUB_FUNC(s_fbuf)
2560 DEFINE_V4L_STUB_FUNC(expbuf)
2561 DEFINE_V4L_STUB_FUNC(g_std)
2562 DEFINE_V4L_STUB_FUNC(g_audio)
2563 DEFINE_V4L_STUB_FUNC(s_audio)
2564 DEFINE_V4L_STUB_FUNC(g_input)
2565 DEFINE_V4L_STUB_FUNC(g_edid)
2566 DEFINE_V4L_STUB_FUNC(s_edid)
2567 DEFINE_V4L_STUB_FUNC(g_output)
2568 DEFINE_V4L_STUB_FUNC(g_audout)
2569 DEFINE_V4L_STUB_FUNC(s_audout)
2570 DEFINE_V4L_STUB_FUNC(g_jpegcomp)
2571 DEFINE_V4L_STUB_FUNC(s_jpegcomp)
2572 DEFINE_V4L_STUB_FUNC(enumaudio)
2573 DEFINE_V4L_STUB_FUNC(enumaudout)
2574 DEFINE_V4L_STUB_FUNC(enum_framesizes)
2575 DEFINE_V4L_STUB_FUNC(enum_frameintervals)
2576 DEFINE_V4L_STUB_FUNC(g_enc_index)
2577 DEFINE_V4L_STUB_FUNC(encoder_cmd)
2578 DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
2579 DEFINE_V4L_STUB_FUNC(decoder_cmd)
2580 DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
2581 DEFINE_V4L_STUB_FUNC(s_dv_timings)
2582 DEFINE_V4L_STUB_FUNC(g_dv_timings)
2583 DEFINE_V4L_STUB_FUNC(enum_dv_timings)
2584 DEFINE_V4L_STUB_FUNC(query_dv_timings)
2585 DEFINE_V4L_STUB_FUNC(dv_timings_cap)
2586
2587 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2588 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2589 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2590 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
2591 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2592 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2593 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2594 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
2595 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2596 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2597 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2598 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2599 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2600 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2601 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2602 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2603 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2604 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
2605 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2606 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2607 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2608 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2609 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2610 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2611 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2612 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
2613 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
2614 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2615 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2616 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0),
2617 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2618 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
2619 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
2620 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0),
2621 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2622 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2623 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
2624 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2625 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2626 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2627 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2628 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2629 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2630 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2631 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2632 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
2633 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
2634 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
2635 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2636 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2637 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2638 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2639 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2640 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2641 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2642 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)),
2643 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2644 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2645 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2646 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2647 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2648 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2649 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
2650 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2651 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2652 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2653 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2654 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2655 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2656 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2657 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)),
2658 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
2659 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2660 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2661 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2662 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2663 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2664 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
2665 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
2666 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
2667 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2668 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)),
2669 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)),
2670 };
2671 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2672
v4l2_is_known_ioctl(unsigned int cmd)2673 static bool v4l2_is_known_ioctl(unsigned int cmd)
2674 {
2675 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2676 return false;
2677 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2678 }
2679
2680 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
v4l2_ioctl_m2m_queue_is_output(unsigned int cmd,void * arg)2681 static bool v4l2_ioctl_m2m_queue_is_output(unsigned int cmd, void *arg)
2682 {
2683 switch (cmd) {
2684 case VIDIOC_CREATE_BUFS: {
2685 struct v4l2_create_buffers *cbufs = arg;
2686
2687 return V4L2_TYPE_IS_OUTPUT(cbufs->format.type);
2688 }
2689 case VIDIOC_REQBUFS: {
2690 struct v4l2_requestbuffers *rbufs = arg;
2691
2692 return V4L2_TYPE_IS_OUTPUT(rbufs->type);
2693 }
2694 case VIDIOC_QBUF:
2695 case VIDIOC_DQBUF:
2696 case VIDIOC_QUERYBUF:
2697 case VIDIOC_PREPARE_BUF: {
2698 struct v4l2_buffer *buf = arg;
2699
2700 return V4L2_TYPE_IS_OUTPUT(buf->type);
2701 }
2702 case VIDIOC_EXPBUF: {
2703 struct v4l2_exportbuffer *expbuf = arg;
2704
2705 return V4L2_TYPE_IS_OUTPUT(expbuf->type);
2706 }
2707 case VIDIOC_STREAMON:
2708 case VIDIOC_STREAMOFF: {
2709 int *type = arg;
2710
2711 return V4L2_TYPE_IS_OUTPUT(*type);
2712 }
2713 default:
2714 return false;
2715 }
2716 }
2717 #endif
2718
v4l2_ioctl_get_lock(struct video_device * vdev,struct v4l2_fh * vfh,unsigned int cmd,void * arg)2719 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
2720 struct v4l2_fh *vfh, unsigned int cmd,
2721 void *arg)
2722 {
2723 if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2724 return vdev->lock;
2725 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
2726 if (vfh && vfh->m2m_ctx &&
2727 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
2728 bool is_output = v4l2_ioctl_m2m_queue_is_output(cmd, arg);
2729 struct v4l2_m2m_queue_ctx *ctx = is_output ?
2730 &vfh->m2m_ctx->out_q_ctx : &vfh->m2m_ctx->cap_q_ctx;
2731
2732 if (ctx->q.lock)
2733 return ctx->q.lock;
2734 }
2735 #endif
2736 if (vdev->queue && vdev->queue->lock &&
2737 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2738 return vdev->queue->lock;
2739 return vdev->lock;
2740 }
2741
2742 /* Common ioctl debug function. This function can be used by
2743 external ioctl messages as well as internal V4L ioctl */
v4l_printk_ioctl(const char * prefix,unsigned int cmd)2744 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2745 {
2746 const char *dir, *type;
2747
2748 if (prefix)
2749 printk(KERN_DEBUG "%s: ", prefix);
2750
2751 switch (_IOC_TYPE(cmd)) {
2752 case 'd':
2753 type = "v4l2_int";
2754 break;
2755 case 'V':
2756 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2757 type = "v4l2";
2758 break;
2759 }
2760 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2761 return;
2762 default:
2763 type = "unknown";
2764 break;
2765 }
2766
2767 switch (_IOC_DIR(cmd)) {
2768 case _IOC_NONE: dir = "--"; break;
2769 case _IOC_READ: dir = "r-"; break;
2770 case _IOC_WRITE: dir = "-w"; break;
2771 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2772 default: dir = "*ERR*"; break;
2773 }
2774 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2775 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2776 }
2777 EXPORT_SYMBOL(v4l_printk_ioctl);
2778
__video_do_ioctl(struct file * file,unsigned int cmd,void * arg)2779 static long __video_do_ioctl(struct file *file,
2780 unsigned int cmd, void *arg)
2781 {
2782 struct video_device *vfd = video_devdata(file);
2783 struct mutex *lock; /* ioctl serialization mutex */
2784 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2785 bool write_only = false;
2786 struct v4l2_ioctl_info default_info;
2787 const struct v4l2_ioctl_info *info;
2788 void *fh = file->private_data;
2789 struct v4l2_fh *vfh = NULL;
2790 int dev_debug = vfd->dev_debug;
2791 long ret = -ENOTTY;
2792
2793 if (ops == NULL) {
2794 pr_warn("%s: has no ioctl_ops.\n",
2795 video_device_node_name(vfd));
2796 return ret;
2797 }
2798
2799 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
2800 vfh = file->private_data;
2801
2802 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
2803
2804 if (lock && mutex_lock_interruptible(lock))
2805 return -ERESTARTSYS;
2806
2807 if (!video_is_registered(vfd)) {
2808 ret = -ENODEV;
2809 goto unlock;
2810 }
2811
2812 if (v4l2_is_known_ioctl(cmd)) {
2813 info = &v4l2_ioctls[_IOC_NR(cmd)];
2814
2815 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2816 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2817 goto done;
2818
2819 if (vfh && (info->flags & INFO_FL_PRIO)) {
2820 ret = v4l2_prio_check(vfd->prio, vfh->prio);
2821 if (ret)
2822 goto done;
2823 }
2824 } else {
2825 default_info.ioctl = cmd;
2826 default_info.flags = 0;
2827 default_info.debug = v4l_print_default;
2828 info = &default_info;
2829 }
2830
2831 write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2832 if (info != &default_info) {
2833 ret = info->func(ops, file, fh, arg);
2834 } else if (!ops->vidioc_default) {
2835 ret = -ENOTTY;
2836 } else {
2837 ret = ops->vidioc_default(file, fh,
2838 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2839 cmd, arg);
2840 }
2841
2842 done:
2843 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
2844 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
2845 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
2846 goto unlock;
2847
2848 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2849 if (ret < 0)
2850 pr_cont(": error %ld", ret);
2851 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
2852 pr_cont("\n");
2853 else if (_IOC_DIR(cmd) == _IOC_NONE)
2854 info->debug(arg, write_only);
2855 else {
2856 pr_cont(": ");
2857 info->debug(arg, write_only);
2858 }
2859 }
2860
2861 unlock:
2862 if (lock)
2863 mutex_unlock(lock);
2864 return ret;
2865 }
2866
check_array_args(unsigned int cmd,void * parg,size_t * array_size,void __user ** user_ptr,void *** kernel_ptr)2867 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2868 void __user **user_ptr, void ***kernel_ptr)
2869 {
2870 int ret = 0;
2871
2872 switch (cmd) {
2873 case VIDIOC_PREPARE_BUF:
2874 case VIDIOC_QUERYBUF:
2875 case VIDIOC_QBUF:
2876 case VIDIOC_DQBUF: {
2877 struct v4l2_buffer *buf = parg;
2878
2879 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2880 if (buf->length > VIDEO_MAX_PLANES) {
2881 ret = -EINVAL;
2882 break;
2883 }
2884 *user_ptr = (void __user *)buf->m.planes;
2885 *kernel_ptr = (void **)&buf->m.planes;
2886 *array_size = sizeof(struct v4l2_plane) * buf->length;
2887 ret = 1;
2888 }
2889 break;
2890 }
2891
2892 case VIDIOC_G_EDID:
2893 case VIDIOC_S_EDID: {
2894 struct v4l2_edid *edid = parg;
2895
2896 if (edid->blocks) {
2897 if (edid->blocks > 256) {
2898 ret = -EINVAL;
2899 break;
2900 }
2901 *user_ptr = (void __user *)edid->edid;
2902 *kernel_ptr = (void **)&edid->edid;
2903 *array_size = edid->blocks * 128;
2904 ret = 1;
2905 }
2906 break;
2907 }
2908
2909 case VIDIOC_S_EXT_CTRLS:
2910 case VIDIOC_G_EXT_CTRLS:
2911 case VIDIOC_TRY_EXT_CTRLS: {
2912 struct v4l2_ext_controls *ctrls = parg;
2913
2914 if (ctrls->count != 0) {
2915 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2916 ret = -EINVAL;
2917 break;
2918 }
2919 *user_ptr = (void __user *)ctrls->controls;
2920 *kernel_ptr = (void **)&ctrls->controls;
2921 *array_size = sizeof(struct v4l2_ext_control)
2922 * ctrls->count;
2923 ret = 1;
2924 }
2925 break;
2926 }
2927 }
2928
2929 return ret;
2930 }
2931
2932 long
video_usercopy(struct file * file,unsigned int cmd,unsigned long arg,v4l2_kioctl func)2933 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2934 v4l2_kioctl func)
2935 {
2936 char sbuf[128];
2937 void *mbuf = NULL;
2938 void *parg = (void *)arg;
2939 long err = -EINVAL;
2940 bool has_array_args;
2941 bool always_copy = false;
2942 size_t array_size = 0;
2943 void __user *user_ptr = NULL;
2944 void **kernel_ptr = NULL;
2945 const size_t ioc_size = _IOC_SIZE(cmd);
2946
2947 /* Copy arguments into temp kernel buffer */
2948 if (_IOC_DIR(cmd) != _IOC_NONE) {
2949 if (ioc_size <= sizeof(sbuf)) {
2950 parg = sbuf;
2951 } else {
2952 /* too big to allocate from stack */
2953 mbuf = kvmalloc(ioc_size, GFP_KERNEL);
2954 if (NULL == mbuf)
2955 return -ENOMEM;
2956 parg = mbuf;
2957 }
2958
2959 err = -EFAULT;
2960 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2961 unsigned int n = ioc_size;
2962
2963 /*
2964 * In some cases, only a few fields are used as input,
2965 * i.e. when the app sets "index" and then the driver
2966 * fills in the rest of the structure for the thing
2967 * with that index. We only need to copy up the first
2968 * non-input field.
2969 */
2970 if (v4l2_is_known_ioctl(cmd)) {
2971 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2972
2973 if (flags & INFO_FL_CLEAR_MASK)
2974 n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2975 always_copy = flags & INFO_FL_ALWAYS_COPY;
2976 }
2977
2978 if (copy_from_user(parg, (void __user *)arg, n))
2979 goto out;
2980
2981 /* zero out anything we don't copy from userspace */
2982 if (n < ioc_size)
2983 memset((u8 *)parg + n, 0, ioc_size - n);
2984 } else {
2985 /* read-only ioctl */
2986 memset(parg, 0, ioc_size);
2987 }
2988 }
2989
2990 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2991 if (err < 0)
2992 goto out;
2993 has_array_args = err;
2994
2995 if (has_array_args) {
2996 /*
2997 * When adding new types of array args, make sure that the
2998 * parent argument to ioctl (which contains the pointer to the
2999 * array) fits into sbuf (so that mbuf will still remain
3000 * unused up to here).
3001 */
3002 mbuf = kvmalloc(array_size, GFP_KERNEL);
3003 err = -ENOMEM;
3004 if (NULL == mbuf)
3005 goto out_array_args;
3006 err = -EFAULT;
3007 if (copy_from_user(mbuf, user_ptr, array_size))
3008 goto out_array_args;
3009 *kernel_ptr = mbuf;
3010 }
3011
3012 /* Handles IOCTL */
3013 err = func(file, cmd, parg);
3014 if (err == -ENOTTY || err == -ENOIOCTLCMD) {
3015 err = -ENOTTY;
3016 goto out;
3017 }
3018
3019 if (err == 0) {
3020 if (cmd == VIDIOC_DQBUF)
3021 trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
3022 else if (cmd == VIDIOC_QBUF)
3023 trace_v4l2_qbuf(video_devdata(file)->minor, parg);
3024 }
3025
3026 if (has_array_args) {
3027 *kernel_ptr = (void __force *)user_ptr;
3028 if (copy_to_user(user_ptr, mbuf, array_size))
3029 err = -EFAULT;
3030 goto out_array_args;
3031 }
3032 /*
3033 * Some ioctls can return an error, but still have valid
3034 * results that must be returned.
3035 */
3036 if (err < 0 && !always_copy)
3037 goto out;
3038
3039 out_array_args:
3040 /* Copy results into user buffer */
3041 switch (_IOC_DIR(cmd)) {
3042 case _IOC_READ:
3043 case (_IOC_WRITE | _IOC_READ):
3044 if (copy_to_user((void __user *)arg, parg, ioc_size))
3045 err = -EFAULT;
3046 break;
3047 }
3048
3049 out:
3050 kvfree(mbuf);
3051 return err;
3052 }
3053
video_ioctl2(struct file * file,unsigned int cmd,unsigned long arg)3054 long video_ioctl2(struct file *file,
3055 unsigned int cmd, unsigned long arg)
3056 {
3057 return video_usercopy(file, cmd, arg, __video_do_ioctl);
3058 }
3059 EXPORT_SYMBOL(video_ioctl2);
3060
