Merge branch 'v4l_for_linus' into staging/for_v3.6
[linux-3.10.git] / drivers / media / video / v4l2-ioctl.c
1 /*
2  * Video capture interface for Linux version 2
3  *
4  * A generic framework to process V4L2 ioctl commands.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  *
11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13  */
14
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/types.h>
18 #include <linux/kernel.h>
19 #include <linux/version.h>
20
21 #include <linux/videodev2.h>
22
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/v4l2-ctrls.h>
26 #include <media/v4l2-fh.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <media/videobuf2-core.h>
31
32 /* Zero out the end of the struct pointed to by p.  Everything after, but
33  * not including, the specified field is cleared. */
34 #define CLEAR_AFTER_FIELD(p, field) \
35         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
36         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
37
38 struct std_descr {
39         v4l2_std_id std;
40         const char *descr;
41 };
42
43 static const struct std_descr standards[] = {
44         { V4L2_STD_NTSC,        "NTSC"      },
45         { V4L2_STD_NTSC_M,      "NTSC-M"    },
46         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
47         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
48         { V4L2_STD_NTSC_443,    "NTSC-443"  },
49         { V4L2_STD_PAL,         "PAL"       },
50         { V4L2_STD_PAL_BG,      "PAL-BG"    },
51         { V4L2_STD_PAL_B,       "PAL-B"     },
52         { V4L2_STD_PAL_B1,      "PAL-B1"    },
53         { V4L2_STD_PAL_G,       "PAL-G"     },
54         { V4L2_STD_PAL_H,       "PAL-H"     },
55         { V4L2_STD_PAL_I,       "PAL-I"     },
56         { V4L2_STD_PAL_DK,      "PAL-DK"    },
57         { V4L2_STD_PAL_D,       "PAL-D"     },
58         { V4L2_STD_PAL_D1,      "PAL-D1"    },
59         { V4L2_STD_PAL_K,       "PAL-K"     },
60         { V4L2_STD_PAL_M,       "PAL-M"     },
61         { V4L2_STD_PAL_N,       "PAL-N"     },
62         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
63         { V4L2_STD_PAL_60,      "PAL-60"    },
64         { V4L2_STD_SECAM,       "SECAM"     },
65         { V4L2_STD_SECAM_B,     "SECAM-B"   },
66         { V4L2_STD_SECAM_G,     "SECAM-G"   },
67         { V4L2_STD_SECAM_H,     "SECAM-H"   },
68         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
69         { V4L2_STD_SECAM_D,     "SECAM-D"   },
70         { V4L2_STD_SECAM_K,     "SECAM-K"   },
71         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
72         { V4L2_STD_SECAM_L,     "SECAM-L"   },
73         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
74         { 0,                    "Unknown"   }
75 };
76
77 /* video4linux standard ID conversion to standard name
78  */
79 const char *v4l2_norm_to_name(v4l2_std_id id)
80 {
81         u32 myid = id;
82         int i;
83
84         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
85            64 bit comparations. So, on that architecture, with some gcc
86            variants, compilation fails. Currently, the max value is 30bit wide.
87          */
88         BUG_ON(myid != id);
89
90         for (i = 0; standards[i].std; i++)
91                 if (myid == standards[i].std)
92                         break;
93         return standards[i].descr;
94 }
95 EXPORT_SYMBOL(v4l2_norm_to_name);
96
97 /* Returns frame period for the given standard */
98 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
99 {
100         if (id & V4L2_STD_525_60) {
101                 frameperiod->numerator = 1001;
102                 frameperiod->denominator = 30000;
103         } else {
104                 frameperiod->numerator = 1;
105                 frameperiod->denominator = 25;
106         }
107 }
108 EXPORT_SYMBOL(v4l2_video_std_frame_period);
109
110 /* Fill in the fields of a v4l2_standard structure according to the
111    'id' and 'transmission' parameters.  Returns negative on error.  */
112 int v4l2_video_std_construct(struct v4l2_standard *vs,
113                              int id, const char *name)
114 {
115         vs->id = id;
116         v4l2_video_std_frame_period(id, &vs->frameperiod);
117         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
118         strlcpy(vs->name, name, sizeof(vs->name));
119         return 0;
120 }
121 EXPORT_SYMBOL(v4l2_video_std_construct);
122
123 /* ----------------------------------------------------------------- */
124 /* some arrays for pretty-printing debug messages of enum types      */
125
126 const char *v4l2_field_names[] = {
127         [V4L2_FIELD_ANY]        = "any",
128         [V4L2_FIELD_NONE]       = "none",
129         [V4L2_FIELD_TOP]        = "top",
130         [V4L2_FIELD_BOTTOM]     = "bottom",
131         [V4L2_FIELD_INTERLACED] = "interlaced",
132         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
133         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
134         [V4L2_FIELD_ALTERNATE]  = "alternate",
135         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
136         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
137 };
138 EXPORT_SYMBOL(v4l2_field_names);
139
140 const char *v4l2_type_names[] = {
141         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
142         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
143         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
144         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
145         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
146         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
147         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
148         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
149         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
151 };
152 EXPORT_SYMBOL(v4l2_type_names);
153
154 static const char *v4l2_memory_names[] = {
155         [V4L2_MEMORY_MMAP]    = "mmap",
156         [V4L2_MEMORY_USERPTR] = "userptr",
157         [V4L2_MEMORY_OVERLAY] = "overlay",
158 };
159
160 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
161                            arr[a] : "unknown")
162
163 /* ------------------------------------------------------------------ */
164 /* debug help functions                                               */
165
166 static void v4l_print_querycap(const void *arg, bool write_only)
167 {
168         const struct v4l2_capability *p = arg;
169
170         pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, "
171                 "capabilities=0x%08x, device_caps=0x%08x\n",
172                 p->driver, p->card, p->bus_info,
173                 p->version, p->capabilities, p->device_caps);
174 }
175
176 static void v4l_print_enuminput(const void *arg, bool write_only)
177 {
178         const struct v4l2_input *p = arg;
179
180         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, "
181                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
182                 p->index, p->name, p->type, p->audioset, p->tuner,
183                 (unsigned long long)p->std, p->status, p->capabilities);
184 }
185
186 static void v4l_print_enumoutput(const void *arg, bool write_only)
187 {
188         const struct v4l2_output *p = arg;
189
190         pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, "
191                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
192                 p->index, p->name, p->type, p->audioset, p->modulator,
193                 (unsigned long long)p->std, p->capabilities);
194 }
195
196 static void v4l_print_audio(const void *arg, bool write_only)
197 {
198         const struct v4l2_audio *p = arg;
199
200         if (write_only)
201                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
202         else
203                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
204                         p->index, p->name, p->capability, p->mode);
205 }
206
207 static void v4l_print_audioout(const void *arg, bool write_only)
208 {
209         const struct v4l2_audioout *p = arg;
210
211         if (write_only)
212                 pr_cont("index=%u\n", p->index);
213         else
214                 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
215                         p->index, p->name, p->capability, p->mode);
216 }
217
218 static void v4l_print_fmtdesc(const void *arg, bool write_only)
219 {
220         const struct v4l2_fmtdesc *p = arg;
221
222         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n",
223                 p->index, prt_names(p->type, v4l2_type_names),
224                 p->flags, (p->pixelformat & 0xff),
225                 (p->pixelformat >>  8) & 0xff,
226                 (p->pixelformat >> 16) & 0xff,
227                 (p->pixelformat >> 24) & 0xff,
228                 p->description);
229 }
230
231 static void v4l_print_format(const void *arg, bool write_only)
232 {
233         const struct v4l2_format *p = arg;
234         const struct v4l2_pix_format *pix;
235         const struct v4l2_pix_format_mplane *mp;
236         const struct v4l2_vbi_format *vbi;
237         const struct v4l2_sliced_vbi_format *sliced;
238         const struct v4l2_window *win;
239         const struct v4l2_clip *clip;
240         unsigned i;
241
242         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
243         switch (p->type) {
244         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
245         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
246                 pix = &p->fmt.pix;
247                 pr_cont(", width=%u, height=%u, "
248                         "pixelformat=%c%c%c%c, field=%s, "
249                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
250                         pix->width, pix->height,
251                         (pix->pixelformat & 0xff),
252                         (pix->pixelformat >>  8) & 0xff,
253                         (pix->pixelformat >> 16) & 0xff,
254                         (pix->pixelformat >> 24) & 0xff,
255                         prt_names(pix->field, v4l2_field_names),
256                         pix->bytesperline, pix->sizeimage,
257                         pix->colorspace);
258                 break;
259         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
260         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
261                 mp = &p->fmt.pix_mp;
262                 pr_cont(", width=%u, height=%u, "
263                         "format=%c%c%c%c, field=%s, "
264                         "colorspace=%d, num_planes=%u\n",
265                         mp->width, mp->height,
266                         (mp->pixelformat & 0xff),
267                         (mp->pixelformat >>  8) & 0xff,
268                         (mp->pixelformat >> 16) & 0xff,
269                         (mp->pixelformat >> 24) & 0xff,
270                         prt_names(mp->field, v4l2_field_names),
271                         mp->colorspace, mp->num_planes);
272                 for (i = 0; i < mp->num_planes; i++)
273                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
274                                         mp->plane_fmt[i].bytesperline,
275                                         mp->plane_fmt[i].sizeimage);
276                 break;
277         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
278         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
279                 win = &p->fmt.win;
280                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
281                         "chromakey=0x%08x, bitmap=%p, "
282                         "global_alpha=0x%02x\n",
283                         win->w.width, win->w.height,
284                         win->w.left, win->w.top,
285                         prt_names(win->field, v4l2_field_names),
286                         win->chromakey, win->bitmap, win->global_alpha);
287                 clip = win->clips;
288                 for (i = 0; i < win->clipcount; i++) {
289                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
290                                         i, clip->c.width, clip->c.height,
291                                         clip->c.left, clip->c.top);
292                         clip = clip->next;
293                 }
294                 break;
295         case V4L2_BUF_TYPE_VBI_CAPTURE:
296         case V4L2_BUF_TYPE_VBI_OUTPUT:
297                 vbi = &p->fmt.vbi;
298                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
299                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
300                         vbi->sampling_rate, vbi->offset,
301                         vbi->samples_per_line,
302                         (vbi->sample_format & 0xff),
303                         (vbi->sample_format >>  8) & 0xff,
304                         (vbi->sample_format >> 16) & 0xff,
305                         (vbi->sample_format >> 24) & 0xff,
306                         vbi->start[0], vbi->start[1],
307                         vbi->count[0], vbi->count[1]);
308                 break;
309         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
310         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
311                 sliced = &p->fmt.sliced;
312                 pr_cont(", service_set=0x%08x, io_size=%d\n",
313                                 sliced->service_set, sliced->io_size);
314                 for (i = 0; i < 24; i++)
315                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
316                                 sliced->service_lines[0][i],
317                                 sliced->service_lines[1][i]);
318                 break;
319         case V4L2_BUF_TYPE_PRIVATE:
320                 pr_cont("\n");
321                 break;
322         }
323 }
324
325 static void v4l_print_framebuffer(const void *arg, bool write_only)
326 {
327         const struct v4l2_framebuffer *p = arg;
328
329         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
330                 "height=%u, pixelformat=%c%c%c%c, "
331                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
332                         p->capability, p->flags, p->base,
333                         p->fmt.width, p->fmt.height,
334                         (p->fmt.pixelformat & 0xff),
335                         (p->fmt.pixelformat >>  8) & 0xff,
336                         (p->fmt.pixelformat >> 16) & 0xff,
337                         (p->fmt.pixelformat >> 24) & 0xff,
338                         p->fmt.bytesperline, p->fmt.sizeimage,
339                         p->fmt.colorspace);
340 }
341
342 static void v4l_print_buftype(const void *arg, bool write_only)
343 {
344         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
345 }
346
347 static void v4l_print_modulator(const void *arg, bool write_only)
348 {
349         const struct v4l2_modulator *p = arg;
350
351         if (write_only)
352                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
353         else
354                 pr_cont("index=%u, name=%s, capability=0x%x, "
355                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
356                         p->index, p->name, p->capability,
357                         p->rangelow, p->rangehigh, p->txsubchans);
358 }
359
360 static void v4l_print_tuner(const void *arg, bool write_only)
361 {
362         const struct v4l2_tuner *p = arg;
363
364         if (write_only)
365                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
366         else
367                 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, "
368                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
369                         "rxsubchans=0x%x, audmode=%u\n",
370                         p->index, p->name, p->type,
371                         p->capability, p->rangelow,
372                         p->rangehigh, p->signal, p->afc,
373                         p->rxsubchans, p->audmode);
374 }
375
376 static void v4l_print_frequency(const void *arg, bool write_only)
377 {
378         const struct v4l2_frequency *p = arg;
379
380         pr_cont("tuner=%u, type=%u, frequency=%u\n",
381                                 p->tuner, p->type, p->frequency);
382 }
383
384 static void v4l_print_standard(const void *arg, bool write_only)
385 {
386         const struct v4l2_standard *p = arg;
387
388         pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, "
389                 "framelines=%u\n", p->index,
390                 (unsigned long long)p->id, p->name,
391                 p->frameperiod.numerator,
392                 p->frameperiod.denominator,
393                 p->framelines);
394 }
395
396 static void v4l_print_std(const void *arg, bool write_only)
397 {
398         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
399 }
400
401 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
402 {
403         const struct v4l2_hw_freq_seek *p = arg;
404
405         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
406                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
407 }
408
409 static void v4l_print_requestbuffers(const void *arg, bool write_only)
410 {
411         const struct v4l2_requestbuffers *p = arg;
412
413         pr_cont("count=%d, type=%s, memory=%s\n",
414                 p->count,
415                 prt_names(p->type, v4l2_type_names),
416                 prt_names(p->memory, v4l2_memory_names));
417 }
418
419 static void v4l_print_buffer(const void *arg, bool write_only)
420 {
421         const struct v4l2_buffer *p = arg;
422         const struct v4l2_timecode *tc = &p->timecode;
423         const struct v4l2_plane *plane;
424         int i;
425
426         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
427                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
428                         p->timestamp.tv_sec / 3600,
429                         (int)(p->timestamp.tv_sec / 60) % 60,
430                         (int)(p->timestamp.tv_sec % 60),
431                         (long)p->timestamp.tv_usec,
432                         p->index,
433                         prt_names(p->type, v4l2_type_names),
434                         p->flags, prt_names(p->field, v4l2_field_names),
435                         p->sequence, prt_names(p->memory, v4l2_memory_names));
436
437         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
438                 pr_cont("\n");
439                 for (i = 0; i < p->length; ++i) {
440                         plane = &p->m.planes[i];
441                         printk(KERN_DEBUG
442                                 "plane %d: bytesused=%d, data_offset=0x%08x "
443                                 "offset/userptr=0x%lx, length=%d\n",
444                                 i, plane->bytesused, plane->data_offset,
445                                 plane->m.userptr, plane->length);
446                 }
447         } else {
448                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
449                         p->bytesused, p->m.userptr, p->length);
450         }
451
452         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
453                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
454                         tc->hours, tc->minutes, tc->seconds,
455                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
456 }
457
458 static void v4l_print_create_buffers(const void *arg, bool write_only)
459 {
460         const struct v4l2_create_buffers *p = arg;
461
462         pr_cont("index=%d, count=%d, memory=%s, ",
463                         p->index, p->count,
464                         prt_names(p->memory, v4l2_memory_names));
465         v4l_print_format(&p->format, write_only);
466 }
467
468 static void v4l_print_streamparm(const void *arg, bool write_only)
469 {
470         const struct v4l2_streamparm *p = arg;
471
472         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
473
474         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
475             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
476                 const struct v4l2_captureparm *c = &p->parm.capture;
477
478                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
479                         "extendedmode=%d, readbuffers=%d\n",
480                         c->capability, c->capturemode,
481                         c->timeperframe.numerator, c->timeperframe.denominator,
482                         c->extendedmode, c->readbuffers);
483         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
484                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
485                 const struct v4l2_outputparm *c = &p->parm.output;
486
487                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
488                         "extendedmode=%d, writebuffers=%d\n",
489                         c->capability, c->outputmode,
490                         c->timeperframe.numerator, c->timeperframe.denominator,
491                         c->extendedmode, c->writebuffers);
492         }
493 }
494
495 static void v4l_print_queryctrl(const void *arg, bool write_only)
496 {
497         const struct v4l2_queryctrl *p = arg;
498
499         pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, "
500                 "step=%d, default=%d, flags=0x%08x\n",
501                         p->id, p->type, p->name,
502                         p->minimum, p->maximum,
503                         p->step, p->default_value, p->flags);
504 }
505
506 static void v4l_print_querymenu(const void *arg, bool write_only)
507 {
508         const struct v4l2_querymenu *p = arg;
509
510         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
511 }
512
513 static void v4l_print_control(const void *arg, bool write_only)
514 {
515         const struct v4l2_control *p = arg;
516
517         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
518 }
519
520 static void v4l_print_ext_controls(const void *arg, bool write_only)
521 {
522         const struct v4l2_ext_controls *p = arg;
523         int i;
524
525         pr_cont("class=0x%x, count=%d, error_idx=%d",
526                         p->ctrl_class, p->count, p->error_idx);
527         for (i = 0; i < p->count; i++) {
528                 if (p->controls[i].size)
529                         pr_cont(", id/val=0x%x/0x%x",
530                                 p->controls[i].id, p->controls[i].value);
531                 else
532                         pr_cont(", id/size=0x%x/%u",
533                                 p->controls[i].id, p->controls[i].size);
534         }
535         pr_cont("\n");
536 }
537
538 static void v4l_print_cropcap(const void *arg, bool write_only)
539 {
540         const struct v4l2_cropcap *p = arg;
541
542         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
543                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
544                 "pixelaspect %d/%d\n",
545                 prt_names(p->type, v4l2_type_names),
546                 p->bounds.width, p->bounds.height,
547                 p->bounds.left, p->bounds.top,
548                 p->defrect.width, p->defrect.height,
549                 p->defrect.left, p->defrect.top,
550                 p->pixelaspect.numerator, p->pixelaspect.denominator);
551 }
552
553 static void v4l_print_crop(const void *arg, bool write_only)
554 {
555         const struct v4l2_crop *p = arg;
556
557         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
558                 prt_names(p->type, v4l2_type_names),
559                 p->c.width, p->c.height,
560                 p->c.left, p->c.top);
561 }
562
563 static void v4l_print_selection(const void *arg, bool write_only)
564 {
565         const struct v4l2_selection *p = arg;
566
567         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
568                 prt_names(p->type, v4l2_type_names),
569                 p->target, p->flags,
570                 p->r.width, p->r.height, p->r.left, p->r.top);
571 }
572
573 static void v4l_print_jpegcompression(const void *arg, bool write_only)
574 {
575         const struct v4l2_jpegcompression *p = arg;
576
577         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
578                 "COM_len=%d, jpeg_markers=0x%x\n",
579                 p->quality, p->APPn, p->APP_len,
580                 p->COM_len, p->jpeg_markers);
581 }
582
583 static void v4l_print_enc_idx(const void *arg, bool write_only)
584 {
585         const struct v4l2_enc_idx *p = arg;
586
587         pr_cont("entries=%d, entries_cap=%d\n",
588                         p->entries, p->entries_cap);
589 }
590
591 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
592 {
593         const struct v4l2_encoder_cmd *p = arg;
594
595         pr_cont("cmd=%d, flags=0x%x\n",
596                         p->cmd, p->flags);
597 }
598
599 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
600 {
601         const struct v4l2_decoder_cmd *p = arg;
602
603         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
604
605         if (p->cmd == V4L2_DEC_CMD_START)
606                 pr_info("speed=%d, format=%u\n",
607                                 p->start.speed, p->start.format);
608         else if (p->cmd == V4L2_DEC_CMD_STOP)
609                 pr_info("pts=%llu\n", p->stop.pts);
610 }
611
612 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
613 {
614         const struct v4l2_dbg_chip_ident *p = arg;
615
616         pr_cont("type=%u, ", p->match.type);
617         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
618                 pr_cont("name=%s, ", p->match.name);
619         else
620                 pr_cont("addr=%u, ", p->match.addr);
621         pr_cont("chip_ident=%u, revision=0x%x\n",
622                         p->ident, p->revision);
623 }
624
625 static void v4l_print_dbg_register(const void *arg, bool write_only)
626 {
627         const struct v4l2_dbg_register *p = arg;
628
629         pr_cont("type=%u, ", p->match.type);
630         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
631                 pr_cont("name=%s, ", p->match.name);
632         else
633                 pr_cont("addr=%u, ", p->match.addr);
634         pr_cont("reg=0x%llx, val=0x%llx\n",
635                         p->reg, p->val);
636 }
637
638 static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
639 {
640         const struct v4l2_dv_enum_preset *p = arg;
641
642         pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n",
643                         p->index, p->preset, p->name, p->width, p->height);
644 }
645
646 static void v4l_print_dv_preset(const void *arg, bool write_only)
647 {
648         const struct v4l2_dv_preset *p = arg;
649
650         pr_cont("preset=%u\n", p->preset);
651 }
652
653 static void v4l_print_dv_timings(const void *arg, bool write_only)
654 {
655         const struct v4l2_dv_timings *p = arg;
656
657         switch (p->type) {
658         case V4L2_DV_BT_656_1120:
659                 pr_cont("type=bt-656/1120, interlaced=%u, "
660                         "pixelclock=%llu, "
661                         "width=%u, height=%u, polarities=0x%x, "
662                         "hfrontporch=%u, hsync=%u, "
663                         "hbackporch=%u, vfrontporch=%u, "
664                         "vsync=%u, vbackporch=%u, "
665                         "il_vfrontporch=%u, il_vsync=%u, "
666                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
667                                 p->bt.interlaced, p->bt.pixelclock,
668                                 p->bt.width, p->bt.height,
669                                 p->bt.polarities, p->bt.hfrontporch,
670                                 p->bt.hsync, p->bt.hbackporch,
671                                 p->bt.vfrontporch, p->bt.vsync,
672                                 p->bt.vbackporch, p->bt.il_vfrontporch,
673                                 p->bt.il_vsync, p->bt.il_vbackporch,
674                                 p->bt.standards, p->bt.flags);
675                 break;
676         default:
677                 pr_cont("type=%d\n", p->type);
678                 break;
679         }
680 }
681
682 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
683 {
684         const struct v4l2_enum_dv_timings *p = arg;
685
686         pr_cont("index=%u, ", p->index);
687         v4l_print_dv_timings(&p->timings, write_only);
688 }
689
690 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
691 {
692         const struct v4l2_dv_timings_cap *p = arg;
693
694         switch (p->type) {
695         case V4L2_DV_BT_656_1120:
696                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
697                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
698                         p->bt.min_width, p->bt.max_width,
699                         p->bt.min_height, p->bt.max_height,
700                         p->bt.min_pixelclock, p->bt.max_pixelclock,
701                         p->bt.standards, p->bt.capabilities);
702                 break;
703         default:
704                 pr_cont("type=%u\n", p->type);
705                 break;
706         }
707 }
708
709 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
710 {
711         const struct v4l2_frmsizeenum *p = arg;
712
713         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
714                         p->index,
715                         (p->pixel_format & 0xff),
716                         (p->pixel_format >>  8) & 0xff,
717                         (p->pixel_format >> 16) & 0xff,
718                         (p->pixel_format >> 24) & 0xff,
719                         p->type);
720         switch (p->type) {
721         case V4L2_FRMSIZE_TYPE_DISCRETE:
722                 pr_cont(" wxh=%ux%u\n",
723                         p->discrete.width, p->discrete.height);
724                 break;
725         case V4L2_FRMSIZE_TYPE_STEPWISE:
726                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
727                                 p->stepwise.min_width,  p->stepwise.min_height,
728                                 p->stepwise.step_width, p->stepwise.step_height,
729                                 p->stepwise.max_width,  p->stepwise.max_height);
730                 break;
731         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
732                 /* fall through */
733         default:
734                 pr_cont("\n");
735                 break;
736         }
737 }
738
739 static void v4l_print_frmivalenum(const void *arg, bool write_only)
740 {
741         const struct v4l2_frmivalenum *p = arg;
742
743         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
744                         p->index,
745                         (p->pixel_format & 0xff),
746                         (p->pixel_format >>  8) & 0xff,
747                         (p->pixel_format >> 16) & 0xff,
748                         (p->pixel_format >> 24) & 0xff,
749                         p->width, p->height, p->type);
750         switch (p->type) {
751         case V4L2_FRMIVAL_TYPE_DISCRETE:
752                 pr_cont(" fps=%d/%d\n",
753                                 p->discrete.numerator,
754                                 p->discrete.denominator);
755                 break;
756         case V4L2_FRMIVAL_TYPE_STEPWISE:
757                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
758                                 p->stepwise.min.numerator,
759                                 p->stepwise.min.denominator,
760                                 p->stepwise.max.numerator,
761                                 p->stepwise.max.denominator,
762                                 p->stepwise.step.numerator,
763                                 p->stepwise.step.denominator);
764                 break;
765         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
766                 /* fall through */
767         default:
768                 pr_cont("\n");
769                 break;
770         }
771 }
772
773 static void v4l_print_event(const void *arg, bool write_only)
774 {
775         const struct v4l2_event *p = arg;
776         const struct v4l2_event_ctrl *c;
777
778         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
779                 "timestamp=%lu.%9.9lu\n",
780                         p->type, p->pending, p->sequence, p->id,
781                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
782         switch (p->type) {
783         case V4L2_EVENT_VSYNC:
784                 printk(KERN_DEBUG "field=%s\n",
785                         prt_names(p->u.vsync.field, v4l2_field_names));
786                 break;
787         case V4L2_EVENT_CTRL:
788                 c = &p->u.ctrl;
789                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
790                         c->changes, c->type);
791                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
792                         pr_cont("value64=%lld, ", c->value64);
793                 else
794                         pr_cont("value=%d, ", c->value);
795                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
796                                 " default_value=%d\n",
797                         c->flags, c->minimum, c->maximum,
798                         c->step, c->default_value);
799                 break;
800         case V4L2_EVENT_FRAME_SYNC:
801                 pr_cont("frame_sequence=%u\n",
802                         p->u.frame_sync.frame_sequence);
803                 break;
804         }
805 }
806
807 static void v4l_print_event_subscription(const void *arg, bool write_only)
808 {
809         const struct v4l2_event_subscription *p = arg;
810
811         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
812                         p->type, p->id, p->flags);
813 }
814
815 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
816 {
817         const struct v4l2_sliced_vbi_cap *p = arg;
818         int i;
819
820         pr_cont("type=%s, service_set=0x%08x\n",
821                         prt_names(p->type, v4l2_type_names), p->service_set);
822         for (i = 0; i < 24; i++)
823                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
824                                 p->service_lines[0][i],
825                                 p->service_lines[1][i]);
826 }
827
828 static void v4l_print_u32(const void *arg, bool write_only)
829 {
830         pr_cont("value=%u\n", *(const u32 *)arg);
831 }
832
833 static void v4l_print_newline(const void *arg, bool write_only)
834 {
835         pr_cont("\n");
836 }
837
838 static void v4l_print_default(const void *arg, bool write_only)
839 {
840         pr_cont("driver-specific ioctl\n");
841 }
842
843 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
844 {
845         __u32 i;
846
847         /* zero the reserved fields */
848         c->reserved[0] = c->reserved[1] = 0;
849         for (i = 0; i < c->count; i++)
850                 c->controls[i].reserved2[0] = 0;
851
852         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
853            when using extended controls.
854            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
855            is it allowed for backwards compatibility.
856          */
857         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
858                 return 0;
859         /* Check that all controls are from the same control class. */
860         for (i = 0; i < c->count; i++) {
861                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
862                         c->error_idx = i;
863                         return 0;
864                 }
865         }
866         return 1;
867 }
868
869 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
870 {
871         if (ops == NULL)
872                 return -EINVAL;
873
874         switch (type) {
875         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
876                 if (ops->vidioc_g_fmt_vid_cap ||
877                                 ops->vidioc_g_fmt_vid_cap_mplane)
878                         return 0;
879                 break;
880         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
881                 if (ops->vidioc_g_fmt_vid_cap_mplane)
882                         return 0;
883                 break;
884         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
885                 if (ops->vidioc_g_fmt_vid_overlay)
886                         return 0;
887                 break;
888         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
889                 if (ops->vidioc_g_fmt_vid_out ||
890                                 ops->vidioc_g_fmt_vid_out_mplane)
891                         return 0;
892                 break;
893         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
894                 if (ops->vidioc_g_fmt_vid_out_mplane)
895                         return 0;
896                 break;
897         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
898                 if (ops->vidioc_g_fmt_vid_out_overlay)
899                         return 0;
900                 break;
901         case V4L2_BUF_TYPE_VBI_CAPTURE:
902                 if (ops->vidioc_g_fmt_vbi_cap)
903                         return 0;
904                 break;
905         case V4L2_BUF_TYPE_VBI_OUTPUT:
906                 if (ops->vidioc_g_fmt_vbi_out)
907                         return 0;
908                 break;
909         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
910                 if (ops->vidioc_g_fmt_sliced_vbi_cap)
911                         return 0;
912                 break;
913         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
914                 if (ops->vidioc_g_fmt_sliced_vbi_out)
915                         return 0;
916                 break;
917         case V4L2_BUF_TYPE_PRIVATE:
918                 if (ops->vidioc_g_fmt_type_private)
919                         return 0;
920                 break;
921         }
922         return -EINVAL;
923 }
924
925 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
926                                 struct file *file, void *fh, void *arg)
927 {
928         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
929
930         cap->version = LINUX_VERSION_CODE;
931         return ops->vidioc_querycap(file, fh, cap);
932 }
933
934 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
935                                 struct file *file, void *fh, void *arg)
936 {
937         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
938 }
939
940 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
941                                 struct file *file, void *fh, void *arg)
942 {
943         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
944 }
945
946 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
947                                 struct file *file, void *fh, void *arg)
948 {
949         struct video_device *vfd;
950         u32 *p = arg;
951
952         if (ops->vidioc_g_priority)
953                 return ops->vidioc_g_priority(file, fh, arg);
954         vfd = video_devdata(file);
955         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
956         return 0;
957 }
958
959 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
960                                 struct file *file, void *fh, void *arg)
961 {
962         struct video_device *vfd;
963         struct v4l2_fh *vfh;
964         u32 *p = arg;
965
966         if (ops->vidioc_s_priority)
967                 return ops->vidioc_s_priority(file, fh, *p);
968         vfd = video_devdata(file);
969         vfh = file->private_data;
970         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
971 }
972
973 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
974                                 struct file *file, void *fh, void *arg)
975 {
976         struct v4l2_input *p = arg;
977
978         /*
979          * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
980          * CAP_STD here based on ioctl handler provided by the
981          * driver. If the driver doesn't support these
982          * for a specific input, it must override these flags.
983          */
984         if (ops->vidioc_s_std)
985                 p->capabilities |= V4L2_IN_CAP_STD;
986         if (ops->vidioc_s_dv_preset)
987                 p->capabilities |= V4L2_IN_CAP_PRESETS;
988         if (ops->vidioc_s_dv_timings)
989                 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
990
991         return ops->vidioc_enum_input(file, fh, p);
992 }
993
994 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
995                                 struct file *file, void *fh, void *arg)
996 {
997         struct v4l2_output *p = arg;
998
999         /*
1000          * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1001          * CAP_STD here based on ioctl handler provided by the
1002          * driver. If the driver doesn't support these
1003          * for a specific output, it must override these flags.
1004          */
1005         if (ops->vidioc_s_std)
1006                 p->capabilities |= V4L2_OUT_CAP_STD;
1007         if (ops->vidioc_s_dv_preset)
1008                 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1009         if (ops->vidioc_s_dv_timings)
1010                 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1011
1012         return ops->vidioc_enum_output(file, fh, p);
1013 }
1014
1015 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1016                                 struct file *file, void *fh, void *arg)
1017 {
1018         struct v4l2_fmtdesc *p = arg;
1019
1020         switch (p->type) {
1021         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1022                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
1023                         break;
1024                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1025         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1026                 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
1027                         break;
1028                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1029         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1030                 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
1031                         break;
1032                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1033         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1034                 if (unlikely(!ops->vidioc_enum_fmt_vid_out))
1035                         break;
1036                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1037         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1038                 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
1039                         break;
1040                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1041         case V4L2_BUF_TYPE_PRIVATE:
1042                 if (unlikely(!ops->vidioc_enum_fmt_type_private))
1043                         break;
1044                 return ops->vidioc_enum_fmt_type_private(file, fh, arg);
1045         }
1046         return -EINVAL;
1047 }
1048
1049 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1050                                 struct file *file, void *fh, void *arg)
1051 {
1052         struct v4l2_format *p = arg;
1053
1054         switch (p->type) {
1055         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1056                 if (unlikely(!ops->vidioc_g_fmt_vid_cap))
1057                         break;
1058                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1059         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1060                 if (unlikely(!ops->vidioc_g_fmt_vid_cap_mplane))
1061                         break;
1062                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1063         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1064                 if (unlikely(!ops->vidioc_g_fmt_vid_overlay))
1065                         break;
1066                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1067         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1068                 if (unlikely(!ops->vidioc_g_fmt_vid_out))
1069                         break;
1070                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1071         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1072                 if (unlikely(!ops->vidioc_g_fmt_vid_out_mplane))
1073                         break;
1074                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1075         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1076                 if (unlikely(!ops->vidioc_g_fmt_vid_out_overlay))
1077                         break;
1078                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1079         case V4L2_BUF_TYPE_VBI_CAPTURE:
1080                 if (unlikely(!ops->vidioc_g_fmt_vbi_cap))
1081                         break;
1082                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1083         case V4L2_BUF_TYPE_VBI_OUTPUT:
1084                 if (unlikely(!ops->vidioc_g_fmt_vbi_out))
1085                         break;
1086                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1087         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1088                 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_cap))
1089                         break;
1090                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1091         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1092                 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_out))
1093                         break;
1094                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1095         case V4L2_BUF_TYPE_PRIVATE:
1096                 if (unlikely(!ops->vidioc_g_fmt_type_private))
1097                         break;
1098                 return ops->vidioc_g_fmt_type_private(file, fh, arg);
1099         }
1100         return -EINVAL;
1101 }
1102
1103 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1104                                 struct file *file, void *fh, void *arg)
1105 {
1106         struct v4l2_format *p = arg;
1107
1108         switch (p->type) {
1109         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1110                 if (unlikely(!ops->vidioc_s_fmt_vid_cap))
1111                         break;
1112                 CLEAR_AFTER_FIELD(p, fmt.pix);
1113                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1114         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1115                 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
1116                         break;
1117                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1118                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1119         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1120                 if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
1121                         break;
1122                 CLEAR_AFTER_FIELD(p, fmt.win);
1123                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1124         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1125                 if (unlikely(!ops->vidioc_s_fmt_vid_out))
1126                         break;
1127                 CLEAR_AFTER_FIELD(p, fmt.pix);
1128                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1129         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1130                 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
1131                         break;
1132                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1133                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1134         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1135                 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
1136                         break;
1137                 CLEAR_AFTER_FIELD(p, fmt.win);
1138                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1139         case V4L2_BUF_TYPE_VBI_CAPTURE:
1140                 if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
1141                         break;
1142                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1143                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1144         case V4L2_BUF_TYPE_VBI_OUTPUT:
1145                 if (unlikely(!ops->vidioc_s_fmt_vbi_out))
1146                         break;
1147                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1148                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1149         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1150                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
1151                         break;
1152                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1153                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1154         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1155                 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
1156                         break;
1157                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1158                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1159         case V4L2_BUF_TYPE_PRIVATE:
1160                 if (unlikely(!ops->vidioc_s_fmt_type_private))
1161                         break;
1162                 return ops->vidioc_s_fmt_type_private(file, fh, arg);
1163         }
1164         return -EINVAL;
1165 }
1166
1167 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1168                                 struct file *file, void *fh, void *arg)
1169 {
1170         struct v4l2_format *p = arg;
1171
1172         switch (p->type) {
1173         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1174                 if (unlikely(!ops->vidioc_try_fmt_vid_cap))
1175                         break;
1176                 CLEAR_AFTER_FIELD(p, fmt.pix);
1177                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1178         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1179                 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
1180                         break;
1181                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1182                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1183         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1184                 if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
1185                         break;
1186                 CLEAR_AFTER_FIELD(p, fmt.win);
1187                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1188         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1189                 if (unlikely(!ops->vidioc_try_fmt_vid_out))
1190                         break;
1191                 CLEAR_AFTER_FIELD(p, fmt.pix);
1192                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1193         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1194                 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
1195                         break;
1196                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1197                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1198         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1199                 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
1200                         break;
1201                 CLEAR_AFTER_FIELD(p, fmt.win);
1202                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1203         case V4L2_BUF_TYPE_VBI_CAPTURE:
1204                 if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
1205                         break;
1206                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1207                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1208         case V4L2_BUF_TYPE_VBI_OUTPUT:
1209                 if (unlikely(!ops->vidioc_try_fmt_vbi_out))
1210                         break;
1211                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1212                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1213         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1214                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
1215                         break;
1216                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1217                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1218         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1219                 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
1220                         break;
1221                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1222                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1223         case V4L2_BUF_TYPE_PRIVATE:
1224                 if (unlikely(!ops->vidioc_try_fmt_type_private))
1225                         break;
1226                 return ops->vidioc_try_fmt_type_private(file, fh, arg);
1227         }
1228         return -EINVAL;
1229 }
1230
1231 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1232                                 struct file *file, void *fh, void *arg)
1233 {
1234         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1235 }
1236
1237 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1238                                 struct file *file, void *fh, void *arg)
1239 {
1240         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1241 }
1242
1243 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1244                                 struct file *file, void *fh, void *arg)
1245 {
1246         struct video_device *vfd = video_devdata(file);
1247         struct v4l2_tuner *p = arg;
1248
1249         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1250                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1251         return ops->vidioc_g_tuner(file, fh, p);
1252 }
1253
1254 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1255                                 struct file *file, void *fh, void *arg)
1256 {
1257         struct video_device *vfd = video_devdata(file);
1258         struct v4l2_tuner *p = arg;
1259
1260         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1261                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1262         return ops->vidioc_s_tuner(file, fh, p);
1263 }
1264
1265 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1266                                 struct file *file, void *fh, void *arg)
1267 {
1268         struct video_device *vfd = video_devdata(file);
1269         struct v4l2_frequency *p = arg;
1270
1271         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1272                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1273         return ops->vidioc_g_frequency(file, fh, p);
1274 }
1275
1276 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1277                                 struct file *file, void *fh, void *arg)
1278 {
1279         struct video_device *vfd = video_devdata(file);
1280         struct v4l2_frequency *p = arg;
1281         enum v4l2_tuner_type type;
1282
1283         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1284                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1285         if (p->type != type)
1286                 return -EINVAL;
1287         return ops->vidioc_s_frequency(file, fh, p);
1288 }
1289
1290 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1291                                 struct file *file, void *fh, void *arg)
1292 {
1293         struct video_device *vfd = video_devdata(file);
1294         struct v4l2_standard *p = arg;
1295         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1296         unsigned int index = p->index, i, j = 0;
1297         const char *descr = "";
1298
1299         /* Return norm array in a canonical way */
1300         for (i = 0; i <= index && id; i++) {
1301                 /* last std value in the standards array is 0, so this
1302                    while always ends there since (id & 0) == 0. */
1303                 while ((id & standards[j].std) != standards[j].std)
1304                         j++;
1305                 curr_id = standards[j].std;
1306                 descr = standards[j].descr;
1307                 j++;
1308                 if (curr_id == 0)
1309                         break;
1310                 if (curr_id != V4L2_STD_PAL &&
1311                                 curr_id != V4L2_STD_SECAM &&
1312                                 curr_id != V4L2_STD_NTSC)
1313                         id &= ~curr_id;
1314         }
1315         if (i <= index)
1316                 return -EINVAL;
1317
1318         v4l2_video_std_construct(p, curr_id, descr);
1319         return 0;
1320 }
1321
1322 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1323                                 struct file *file, void *fh, void *arg)
1324 {
1325         struct video_device *vfd = video_devdata(file);
1326         v4l2_std_id *id = arg;
1327
1328         /* Calls the specific handler */
1329         if (ops->vidioc_g_std)
1330                 return ops->vidioc_g_std(file, fh, arg);
1331         if (vfd->current_norm) {
1332                 *id = vfd->current_norm;
1333                 return 0;
1334         }
1335         return -ENOTTY;
1336 }
1337
1338 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1339                                 struct file *file, void *fh, void *arg)
1340 {
1341         struct video_device *vfd = video_devdata(file);
1342         v4l2_std_id *id = arg, norm;
1343         int ret;
1344
1345         norm = (*id) & vfd->tvnorms;
1346         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1347                 return -EINVAL;
1348
1349         /* Calls the specific handler */
1350         ret = ops->vidioc_s_std(file, fh, &norm);
1351
1352         /* Updates standard information */
1353         if (ret >= 0)
1354                 vfd->current_norm = norm;
1355         return ret;
1356 }
1357
1358 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1359                                 struct file *file, void *fh, void *arg)
1360 {
1361         struct video_device *vfd = video_devdata(file);
1362         v4l2_std_id *p = arg;
1363
1364         /*
1365          * If nothing detected, it should return all supported
1366          * standard.
1367          * Drivers just need to mask the std argument, in order
1368          * to remove the standards that don't apply from the mask.
1369          * This means that tuners, audio and video decoders can join
1370          * their efforts to improve the standards detection.
1371          */
1372         *p = vfd->tvnorms;
1373         return ops->vidioc_querystd(file, fh, arg);
1374 }
1375
1376 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1377                                 struct file *file, void *fh, void *arg)
1378 {
1379         struct video_device *vfd = video_devdata(file);
1380         struct v4l2_hw_freq_seek *p = arg;
1381         enum v4l2_tuner_type type;
1382
1383         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1384                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1385         if (p->type != type)
1386                 return -EINVAL;
1387         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1388 }
1389
1390 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1391                                 struct file *file, void *fh, void *arg)
1392 {
1393         struct v4l2_requestbuffers *p = arg;
1394         int ret = check_fmt(ops, p->type);
1395
1396         if (ret)
1397                 return ret;
1398
1399         if (p->type < V4L2_BUF_TYPE_PRIVATE)
1400                 CLEAR_AFTER_FIELD(p, memory);
1401
1402         return ops->vidioc_reqbufs(file, fh, p);
1403 }
1404
1405 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1406                                 struct file *file, void *fh, void *arg)
1407 {
1408         struct v4l2_buffer *p = arg;
1409         int ret = check_fmt(ops, p->type);
1410
1411         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1412 }
1413
1414 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1415                                 struct file *file, void *fh, void *arg)
1416 {
1417         struct v4l2_buffer *p = arg;
1418         int ret = check_fmt(ops, p->type);
1419
1420         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1421 }
1422
1423 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1424                                 struct file *file, void *fh, void *arg)
1425 {
1426         struct v4l2_buffer *p = arg;
1427         int ret = check_fmt(ops, p->type);
1428
1429         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1430 }
1431
1432 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1433                                 struct file *file, void *fh, void *arg)
1434 {
1435         struct v4l2_create_buffers *create = arg;
1436         int ret = check_fmt(ops, create->format.type);
1437
1438         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1439 }
1440
1441 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1442                                 struct file *file, void *fh, void *arg)
1443 {
1444         struct v4l2_buffer *b = arg;
1445         int ret = check_fmt(ops, b->type);
1446
1447         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1448 }
1449
1450 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
1451                                 struct file *file, void *fh, void *arg)
1452 {
1453         struct video_device *vfd = video_devdata(file);
1454         struct v4l2_streamparm *p = arg;
1455         v4l2_std_id std;
1456         int ret = check_fmt(ops, p->type);
1457
1458         if (ret)
1459                 return ret;
1460         if (ops->vidioc_g_parm)
1461                 return ops->vidioc_g_parm(file, fh, p);
1462         std = vfd->current_norm;
1463         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1464             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1465                 return -EINVAL;
1466         p->parm.capture.readbuffers = 2;
1467         if (ops->vidioc_g_std)
1468                 ret = ops->vidioc_g_std(file, fh, &std);
1469         if (ret == 0)
1470                 v4l2_video_std_frame_period(std,
1471                             &p->parm.capture.timeperframe);
1472         return ret;
1473 }
1474
1475 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1476                                 struct file *file, void *fh, void *arg)
1477 {
1478         struct v4l2_streamparm *p = arg;
1479         int ret = check_fmt(ops, p->type);
1480
1481         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1482 }
1483
1484 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1485                                 struct file *file, void *fh, void *arg)
1486 {
1487         struct video_device *vfd = video_devdata(file);
1488         struct v4l2_queryctrl *p = arg;
1489         struct v4l2_fh *vfh = fh;
1490
1491         if (vfh && vfh->ctrl_handler)
1492                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1493         if (vfd->ctrl_handler)
1494                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1495         if (ops->vidioc_queryctrl)
1496                 return ops->vidioc_queryctrl(file, fh, p);
1497         return -ENOTTY;
1498 }
1499
1500 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1501                                 struct file *file, void *fh, void *arg)
1502 {
1503         struct video_device *vfd = video_devdata(file);
1504         struct v4l2_querymenu *p = arg;
1505         struct v4l2_fh *vfh = fh;
1506
1507         if (vfh && vfh->ctrl_handler)
1508                 return v4l2_querymenu(vfh->ctrl_handler, p);
1509         if (vfd->ctrl_handler)
1510                 return v4l2_querymenu(vfd->ctrl_handler, p);
1511         if (ops->vidioc_querymenu)
1512                 return ops->vidioc_querymenu(file, fh, p);
1513         return -ENOTTY;
1514 }
1515
1516 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1517                                 struct file *file, void *fh, void *arg)
1518 {
1519         struct video_device *vfd = video_devdata(file);
1520         struct v4l2_control *p = arg;
1521         struct v4l2_fh *vfh = fh;
1522         struct v4l2_ext_controls ctrls;
1523         struct v4l2_ext_control ctrl;
1524
1525         if (vfh && vfh->ctrl_handler)
1526                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1527         if (vfd->ctrl_handler)
1528                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1529         if (ops->vidioc_g_ctrl)
1530                 return ops->vidioc_g_ctrl(file, fh, p);
1531         if (ops->vidioc_g_ext_ctrls == NULL)
1532                 return -ENOTTY;
1533
1534         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1535         ctrls.count = 1;
1536         ctrls.controls = &ctrl;
1537         ctrl.id = p->id;
1538         ctrl.value = p->value;
1539         if (check_ext_ctrls(&ctrls, 1)) {
1540                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1541
1542                 if (ret == 0)
1543                         p->value = ctrl.value;
1544                 return ret;
1545         }
1546         return -EINVAL;
1547 }
1548
1549 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1550                                 struct file *file, void *fh, void *arg)
1551 {
1552         struct video_device *vfd = video_devdata(file);
1553         struct v4l2_control *p = arg;
1554         struct v4l2_fh *vfh = fh;
1555         struct v4l2_ext_controls ctrls;
1556         struct v4l2_ext_control ctrl;
1557
1558         if (vfh && vfh->ctrl_handler)
1559                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1560         if (vfd->ctrl_handler)
1561                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1562         if (ops->vidioc_s_ctrl)
1563                 return ops->vidioc_s_ctrl(file, fh, p);
1564         if (ops->vidioc_s_ext_ctrls == NULL)
1565                 return -ENOTTY;
1566
1567         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1568         ctrls.count = 1;
1569         ctrls.controls = &ctrl;
1570         ctrl.id = p->id;
1571         ctrl.value = p->value;
1572         if (check_ext_ctrls(&ctrls, 1))
1573                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1574         return -EINVAL;
1575 }
1576
1577 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1578                                 struct file *file, void *fh, void *arg)
1579 {
1580         struct video_device *vfd = video_devdata(file);
1581         struct v4l2_ext_controls *p = arg;
1582         struct v4l2_fh *vfh = fh;
1583
1584         p->error_idx = p->count;
1585         if (vfh && vfh->ctrl_handler)
1586                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1587         if (vfd->ctrl_handler)
1588                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1589         if (ops->vidioc_g_ext_ctrls == NULL)
1590                 return -ENOTTY;
1591         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1592                                         -EINVAL;
1593 }
1594
1595 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1596                                 struct file *file, void *fh, void *arg)
1597 {
1598         struct video_device *vfd = video_devdata(file);
1599         struct v4l2_ext_controls *p = arg;
1600         struct v4l2_fh *vfh = fh;
1601
1602         p->error_idx = p->count;
1603         if (vfh && vfh->ctrl_handler)
1604                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1605         if (vfd->ctrl_handler)
1606                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1607         if (ops->vidioc_s_ext_ctrls == NULL)
1608                 return -ENOTTY;
1609         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1610                                         -EINVAL;
1611 }
1612
1613 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1614                                 struct file *file, void *fh, void *arg)
1615 {
1616         struct video_device *vfd = video_devdata(file);
1617         struct v4l2_ext_controls *p = arg;
1618         struct v4l2_fh *vfh = fh;
1619
1620         p->error_idx = p->count;
1621         if (vfh && vfh->ctrl_handler)
1622                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1623         if (vfd->ctrl_handler)
1624                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1625         if (ops->vidioc_try_ext_ctrls == NULL)
1626                 return -ENOTTY;
1627         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1628                                         -EINVAL;
1629 }
1630
1631 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1632                                 struct file *file, void *fh, void *arg)
1633 {
1634         struct v4l2_crop *p = arg;
1635         struct v4l2_selection s = {
1636                 .type = p->type,
1637         };
1638         int ret;
1639
1640         if (ops->vidioc_g_crop)
1641                 return ops->vidioc_g_crop(file, fh, p);
1642         /* simulate capture crop using selection api */
1643
1644         /* crop means compose for output devices */
1645         if (V4L2_TYPE_IS_OUTPUT(p->type))
1646                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1647         else
1648                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1649
1650         ret = ops->vidioc_g_selection(file, fh, &s);
1651
1652         /* copying results to old structure on success */
1653         if (!ret)
1654                 p->c = s.r;
1655         return ret;
1656 }
1657
1658 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1659                                 struct file *file, void *fh, void *arg)
1660 {
1661         struct v4l2_crop *p = arg;
1662         struct v4l2_selection s = {
1663                 .type = p->type,
1664                 .r = p->c,
1665         };
1666
1667         if (ops->vidioc_s_crop)
1668                 return ops->vidioc_s_crop(file, fh, p);
1669         /* simulate capture crop using selection api */
1670
1671         /* crop means compose for output devices */
1672         if (V4L2_TYPE_IS_OUTPUT(p->type))
1673                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1674         else
1675                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1676
1677         return ops->vidioc_s_selection(file, fh, &s);
1678 }
1679
1680 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1681                                 struct file *file, void *fh, void *arg)
1682 {
1683         struct v4l2_cropcap *p = arg;
1684         struct v4l2_selection s = { .type = p->type };
1685         int ret;
1686
1687         if (ops->vidioc_cropcap)
1688                 return ops->vidioc_cropcap(file, fh, p);
1689
1690         /* obtaining bounds */
1691         if (V4L2_TYPE_IS_OUTPUT(p->type))
1692                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1693         else
1694                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1695
1696         ret = ops->vidioc_g_selection(file, fh, &s);
1697         if (ret)
1698                 return ret;
1699         p->bounds = s.r;
1700
1701         /* obtaining defrect */
1702         if (V4L2_TYPE_IS_OUTPUT(p->type))
1703                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1704         else
1705                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1706
1707         ret = ops->vidioc_g_selection(file, fh, &s);
1708         if (ret)
1709                 return ret;
1710         p->defrect = s.r;
1711
1712         /* setting trivial pixelaspect */
1713         p->pixelaspect.numerator = 1;
1714         p->pixelaspect.denominator = 1;
1715         return 0;
1716 }
1717
1718 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1719                                 struct file *file, void *fh, void *arg)
1720 {
1721         struct video_device *vfd = video_devdata(file);
1722         int ret;
1723
1724         if (vfd->v4l2_dev)
1725                 pr_info("%s: =================  START STATUS  =================\n",
1726                         vfd->v4l2_dev->name);
1727         ret = ops->vidioc_log_status(file, fh);
1728         if (vfd->v4l2_dev)
1729                 pr_info("%s: ==================  END STATUS  ==================\n",
1730                         vfd->v4l2_dev->name);
1731         return ret;
1732 }
1733
1734 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1735                                 struct file *file, void *fh, void *arg)
1736 {
1737 #ifdef CONFIG_VIDEO_ADV_DEBUG
1738         struct v4l2_dbg_register *p = arg;
1739
1740         if (!capable(CAP_SYS_ADMIN))
1741                 return -EPERM;
1742         return ops->vidioc_g_register(file, fh, p);
1743 #else
1744         return -ENOTTY;
1745 #endif
1746 }
1747
1748 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1749                                 struct file *file, void *fh, void *arg)
1750 {
1751 #ifdef CONFIG_VIDEO_ADV_DEBUG
1752         struct v4l2_dbg_register *p = arg;
1753
1754         if (!capable(CAP_SYS_ADMIN))
1755                 return -EPERM;
1756         return ops->vidioc_s_register(file, fh, p);
1757 #else
1758         return -ENOTTY;
1759 #endif
1760 }
1761
1762 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1763                                 struct file *file, void *fh, void *arg)
1764 {
1765         struct v4l2_dbg_chip_ident *p = arg;
1766
1767         p->ident = V4L2_IDENT_NONE;
1768         p->revision = 0;
1769         return ops->vidioc_g_chip_ident(file, fh, p);
1770 }
1771
1772 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1773                                 struct file *file, void *fh, void *arg)
1774 {
1775         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1776 }
1777
1778 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1779                                 struct file *file, void *fh, void *arg)
1780 {
1781         return ops->vidioc_subscribe_event(fh, arg);
1782 }
1783
1784 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1785                                 struct file *file, void *fh, void *arg)
1786 {
1787         return ops->vidioc_unsubscribe_event(fh, arg);
1788 }
1789
1790 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1791                                 struct file *file, void *fh, void *arg)
1792 {
1793         struct v4l2_sliced_vbi_cap *p = arg;
1794
1795         /* Clear up to type, everything after type is zeroed already */
1796         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1797
1798         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1799 }
1800
1801 struct v4l2_ioctl_info {
1802         unsigned int ioctl;
1803         u32 flags;
1804         const char * const name;
1805         union {
1806                 u32 offset;
1807                 int (*func)(const struct v4l2_ioctl_ops *ops,
1808                                 struct file *file, void *fh, void *p);
1809         };
1810         void (*debug)(const void *arg, bool write_only);
1811 };
1812
1813 /* This control needs a priority check */
1814 #define INFO_FL_PRIO    (1 << 0)
1815 /* This control can be valid if the filehandle passes a control handler. */
1816 #define INFO_FL_CTRL    (1 << 1)
1817 /* This is a standard ioctl, no need for special code */
1818 #define INFO_FL_STD     (1 << 2)
1819 /* This is ioctl has its own function */
1820 #define INFO_FL_FUNC    (1 << 3)
1821 /* Queuing ioctl */
1822 #define INFO_FL_QUEUE   (1 << 4)
1823 /* Zero struct from after the field to the end */
1824 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
1825         ((offsetof(struct v4l2_struct, field) +                 \
1826           sizeof(((struct v4l2_struct *)0)->field)) << 16)
1827 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
1828
1829 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
1830         [_IOC_NR(_ioctl)] = {                                           \
1831                 .ioctl = _ioctl,                                        \
1832                 .flags = _flags | INFO_FL_STD,                          \
1833                 .name = #_ioctl,                                        \
1834                 .offset = offsetof(struct v4l2_ioctl_ops, _vidioc),     \
1835                 .debug = _debug,                                        \
1836         }
1837
1838 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
1839         [_IOC_NR(_ioctl)] = {                                           \
1840                 .ioctl = _ioctl,                                        \
1841                 .flags = _flags | INFO_FL_FUNC,                         \
1842                 .name = #_ioctl,                                        \
1843                 .func = _func,                                          \
1844                 .debug = _debug,                                        \
1845         }
1846
1847 static struct v4l2_ioctl_info v4l2_ioctls[] = {
1848         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
1849         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
1850         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
1851         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
1852         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1853         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
1854         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
1855         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
1856         IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO),
1857         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
1858         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
1859         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1860         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
1861         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
1862         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
1863         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
1864         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
1865         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
1866         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
1867         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
1868         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
1869         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
1870         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
1871         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
1872         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
1873         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
1874         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
1875         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
1876         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
1877         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
1878         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
1879         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
1880         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
1881         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
1882         IOCTL_INFO_STD(VIDIOC_G_MODULATOR, vidioc_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
1883         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
1884         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
1885         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
1886         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
1887         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
1888         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
1889         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
1890         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
1891         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
1892         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
1893         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
1894         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
1895         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
1896         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
1897         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
1898         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
1899         IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
1900         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
1901         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
1902         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
1903         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, 0),
1904         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
1905         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
1906         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
1907         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1908         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
1909         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
1910         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
1911         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
1912         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
1913         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
1914         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
1915         IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
1916         IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
1917         IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
1918         IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
1919         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
1920         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
1921         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
1922         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
1923         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
1924         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
1925         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
1926         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
1927         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
1928         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, 0),
1929 };
1930 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
1931
1932 bool v4l2_is_known_ioctl(unsigned int cmd)
1933 {
1934         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
1935                 return false;
1936         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
1937 }
1938
1939 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
1940 {
1941         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
1942                 return vdev->lock;
1943         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
1944                 return NULL;
1945         if (vdev->queue && vdev->queue->lock &&
1946                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
1947                 return vdev->queue->lock;
1948         return vdev->lock;
1949 }
1950
1951 /* Common ioctl debug function. This function can be used by
1952    external ioctl messages as well as internal V4L ioctl */
1953 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
1954 {
1955         const char *dir, *type;
1956
1957         if (prefix)
1958                 printk(KERN_DEBUG "%s: ", prefix);
1959
1960         switch (_IOC_TYPE(cmd)) {
1961         case 'd':
1962                 type = "v4l2_int";
1963                 break;
1964         case 'V':
1965                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
1966                         type = "v4l2";
1967                         break;
1968                 }
1969                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
1970                 return;
1971         default:
1972                 type = "unknown";
1973                 break;
1974         }
1975
1976         switch (_IOC_DIR(cmd)) {
1977         case _IOC_NONE:              dir = "--"; break;
1978         case _IOC_READ:              dir = "r-"; break;
1979         case _IOC_WRITE:             dir = "-w"; break;
1980         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
1981         default:                     dir = "*ERR*"; break;
1982         }
1983         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
1984                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
1985 }
1986 EXPORT_SYMBOL(v4l_printk_ioctl);
1987
1988 static long __video_do_ioctl(struct file *file,
1989                 unsigned int cmd, void *arg)
1990 {
1991         struct video_device *vfd = video_devdata(file);
1992         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
1993         bool write_only = false;
1994         struct v4l2_ioctl_info default_info;
1995         const struct v4l2_ioctl_info *info;
1996         void *fh = file->private_data;
1997         struct v4l2_fh *vfh = NULL;
1998         int use_fh_prio = 0;
1999         int debug = vfd->debug;
2000         long ret = -ENOTTY;
2001
2002         if (ops == NULL) {
2003                 pr_warn("%s: has no ioctl_ops.\n",
2004                                 video_device_node_name(vfd));
2005                 return ret;
2006         }
2007
2008         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2009                 vfh = file->private_data;
2010                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2011         }
2012
2013         if (v4l2_is_known_ioctl(cmd)) {
2014                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2015
2016                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2017                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2018                         goto done;
2019
2020                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2021                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2022                         if (ret)
2023                                 goto done;
2024                 }
2025         } else {
2026                 default_info.ioctl = cmd;
2027                 default_info.flags = 0;
2028                 default_info.debug = v4l_print_default;
2029                 info = &default_info;
2030         }
2031
2032         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2033         if (write_only && debug > V4L2_DEBUG_IOCTL) {
2034                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2035                 pr_cont(": ");
2036                 info->debug(arg, write_only);
2037         }
2038         if (info->flags & INFO_FL_STD) {
2039                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2040                 const void *p = vfd->ioctl_ops;
2041                 const vidioc_op *vidioc = p + info->offset;
2042
2043                 ret = (*vidioc)(file, fh, arg);
2044         } else if (info->flags & INFO_FL_FUNC) {
2045                 ret = info->func(ops, file, fh, arg);
2046         } else if (!ops->vidioc_default) {
2047                 ret = -ENOTTY;
2048         } else {
2049                 ret = ops->vidioc_default(file, fh,
2050                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2051                         cmd, arg);
2052         }
2053
2054 done:
2055         if (debug) {
2056                 if (write_only && debug > V4L2_DEBUG_IOCTL) {
2057                         if (ret < 0)
2058                                 printk(KERN_DEBUG "%s: error %ld\n",
2059                                         video_device_node_name(vfd), ret);
2060                         return ret;
2061                 }
2062                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2063                 if (ret < 0)
2064                         pr_cont(": error %ld\n", ret);
2065                 else if (debug == V4L2_DEBUG_IOCTL)
2066                         pr_cont("\n");
2067                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2068                         info->debug(arg, write_only);
2069                 else {
2070                         pr_cont(": ");
2071                         info->debug(arg, write_only);
2072                 }
2073         }
2074
2075         return ret;
2076 }
2077
2078 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2079                             void * __user *user_ptr, void ***kernel_ptr)
2080 {
2081         int ret = 0;
2082
2083         switch (cmd) {
2084         case VIDIOC_QUERYBUF:
2085         case VIDIOC_QBUF:
2086         case VIDIOC_DQBUF: {
2087                 struct v4l2_buffer *buf = parg;
2088
2089                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2090                         if (buf->length > VIDEO_MAX_PLANES) {
2091                                 ret = -EINVAL;
2092                                 break;
2093                         }
2094                         *user_ptr = (void __user *)buf->m.planes;
2095                         *kernel_ptr = (void *)&buf->m.planes;
2096                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2097                         ret = 1;
2098                 }
2099                 break;
2100         }
2101
2102         case VIDIOC_S_EXT_CTRLS:
2103         case VIDIOC_G_EXT_CTRLS:
2104         case VIDIOC_TRY_EXT_CTRLS: {
2105                 struct v4l2_ext_controls *ctrls = parg;
2106
2107                 if (ctrls->count != 0) {
2108                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2109                                 ret = -EINVAL;
2110                                 break;
2111                         }
2112                         *user_ptr = (void __user *)ctrls->controls;
2113                         *kernel_ptr = (void *)&ctrls->controls;
2114                         *array_size = sizeof(struct v4l2_ext_control)
2115                                     * ctrls->count;
2116                         ret = 1;
2117                 }
2118                 break;
2119         }
2120         }
2121
2122         return ret;
2123 }
2124
2125 long
2126 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2127                v4l2_kioctl func)
2128 {
2129         char    sbuf[128];
2130         void    *mbuf = NULL;
2131         void    *parg = (void *)arg;
2132         long    err  = -EINVAL;
2133         bool    has_array_args;
2134         size_t  array_size = 0;
2135         void __user *user_ptr = NULL;
2136         void    **kernel_ptr = NULL;
2137
2138         /*  Copy arguments into temp kernel buffer  */
2139         if (_IOC_DIR(cmd) != _IOC_NONE) {
2140                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2141                         parg = sbuf;
2142                 } else {
2143                         /* too big to allocate from stack */
2144                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2145                         if (NULL == mbuf)
2146                                 return -ENOMEM;
2147                         parg = mbuf;
2148                 }
2149
2150                 err = -EFAULT;
2151                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2152                         unsigned int n = _IOC_SIZE(cmd);
2153
2154                         /*
2155                          * In some cases, only a few fields are used as input,
2156                          * i.e. when the app sets "index" and then the driver
2157                          * fills in the rest of the structure for the thing
2158                          * with that index.  We only need to copy up the first
2159                          * non-input field.
2160                          */
2161                         if (v4l2_is_known_ioctl(cmd)) {
2162                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2163                                 if (flags & INFO_FL_CLEAR_MASK)
2164                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2165                         }
2166
2167                         if (copy_from_user(parg, (void __user *)arg, n))
2168                                 goto out;
2169
2170                         /* zero out anything we don't copy from userspace */
2171                         if (n < _IOC_SIZE(cmd))
2172                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2173                 } else {
2174                         /* read-only ioctl */
2175                         memset(parg, 0, _IOC_SIZE(cmd));
2176                 }
2177         }
2178
2179         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2180         if (err < 0)
2181                 goto out;
2182         has_array_args = err;
2183
2184         if (has_array_args) {
2185                 /*
2186                  * When adding new types of array args, make sure that the
2187                  * parent argument to ioctl (which contains the pointer to the
2188                  * array) fits into sbuf (so that mbuf will still remain
2189                  * unused up to here).
2190                  */
2191                 mbuf = kmalloc(array_size, GFP_KERNEL);
2192                 err = -ENOMEM;
2193                 if (NULL == mbuf)
2194                         goto out_array_args;
2195                 err = -EFAULT;
2196                 if (copy_from_user(mbuf, user_ptr, array_size))
2197                         goto out_array_args;
2198                 *kernel_ptr = mbuf;
2199         }
2200
2201         /* Handles IOCTL */
2202         err = func(file, cmd, parg);
2203         if (err == -ENOIOCTLCMD)
2204                 err = -ENOTTY;
2205
2206         if (has_array_args) {
2207                 *kernel_ptr = user_ptr;
2208                 if (copy_to_user(user_ptr, mbuf, array_size))
2209                         err = -EFAULT;
2210                 goto out_array_args;
2211         }
2212         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2213            results that must be returned. */
2214         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2215                 goto out;
2216
2217 out_array_args:
2218         /*  Copy results into user buffer  */
2219         switch (_IOC_DIR(cmd)) {
2220         case _IOC_READ:
2221         case (_IOC_WRITE | _IOC_READ):
2222                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2223                         err = -EFAULT;
2224                 break;
2225         }
2226
2227 out:
2228         kfree(mbuf);
2229         return err;
2230 }
2231 EXPORT_SYMBOL(video_usercopy);
2232
2233 long video_ioctl2(struct file *file,
2234                unsigned int cmd, unsigned long arg)
2235 {
2236         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2237 }
2238 EXPORT_SYMBOL(video_ioctl2);