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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
[karo-tx-linux.git] / drivers / media / v4l2-core / v4l2-ioctl.c
1 /*
2  * Video capture interface for Linux version 2
3  *
4  * A generic framework to process V4L2 ioctl commands.
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version
9  * 2 of the License, or (at your option) any later version.
10  *
11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12  *              Mauro Carvalho Chehab <mchehab@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 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
39
40 struct std_descr {
41         v4l2_std_id std;
42         const char *descr;
43 };
44
45 static const struct std_descr standards[] = {
46         { V4L2_STD_NTSC,        "NTSC"      },
47         { V4L2_STD_NTSC_M,      "NTSC-M"    },
48         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
49         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
50         { V4L2_STD_NTSC_443,    "NTSC-443"  },
51         { V4L2_STD_PAL,         "PAL"       },
52         { V4L2_STD_PAL_BG,      "PAL-BG"    },
53         { V4L2_STD_PAL_B,       "PAL-B"     },
54         { V4L2_STD_PAL_B1,      "PAL-B1"    },
55         { V4L2_STD_PAL_G,       "PAL-G"     },
56         { V4L2_STD_PAL_H,       "PAL-H"     },
57         { V4L2_STD_PAL_I,       "PAL-I"     },
58         { V4L2_STD_PAL_DK,      "PAL-DK"    },
59         { V4L2_STD_PAL_D,       "PAL-D"     },
60         { V4L2_STD_PAL_D1,      "PAL-D1"    },
61         { V4L2_STD_PAL_K,       "PAL-K"     },
62         { V4L2_STD_PAL_M,       "PAL-M"     },
63         { V4L2_STD_PAL_N,       "PAL-N"     },
64         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
65         { V4L2_STD_PAL_60,      "PAL-60"    },
66         { V4L2_STD_SECAM,       "SECAM"     },
67         { V4L2_STD_SECAM_B,     "SECAM-B"   },
68         { V4L2_STD_SECAM_G,     "SECAM-G"   },
69         { V4L2_STD_SECAM_H,     "SECAM-H"   },
70         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
71         { V4L2_STD_SECAM_D,     "SECAM-D"   },
72         { V4L2_STD_SECAM_K,     "SECAM-K"   },
73         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
74         { V4L2_STD_SECAM_L,     "SECAM-L"   },
75         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
76         { 0,                    "Unknown"   }
77 };
78
79 /* video4linux standard ID conversion to standard name
80  */
81 const char *v4l2_norm_to_name(v4l2_std_id id)
82 {
83         u32 myid = id;
84         int i;
85
86         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
87            64 bit comparations. So, on that architecture, with some gcc
88            variants, compilation fails. Currently, the max value is 30bit wide.
89          */
90         BUG_ON(myid != id);
91
92         for (i = 0; standards[i].std; i++)
93                 if (myid == standards[i].std)
94                         break;
95         return standards[i].descr;
96 }
97 EXPORT_SYMBOL(v4l2_norm_to_name);
98
99 /* Returns frame period for the given standard */
100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
101 {
102         if (id & V4L2_STD_525_60) {
103                 frameperiod->numerator = 1001;
104                 frameperiod->denominator = 30000;
105         } else {
106                 frameperiod->numerator = 1;
107                 frameperiod->denominator = 25;
108         }
109 }
110 EXPORT_SYMBOL(v4l2_video_std_frame_period);
111
112 /* Fill in the fields of a v4l2_standard structure according to the
113    'id' and 'transmission' parameters.  Returns negative on error.  */
114 int v4l2_video_std_construct(struct v4l2_standard *vs,
115                              int id, const char *name)
116 {
117         vs->id = id;
118         v4l2_video_std_frame_period(id, &vs->frameperiod);
119         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
120         strlcpy(vs->name, name, sizeof(vs->name));
121         return 0;
122 }
123 EXPORT_SYMBOL(v4l2_video_std_construct);
124
125 /* ----------------------------------------------------------------- */
126 /* some arrays for pretty-printing debug messages of enum types      */
127
128 const char *v4l2_field_names[] = {
129         [V4L2_FIELD_ANY]        = "any",
130         [V4L2_FIELD_NONE]       = "none",
131         [V4L2_FIELD_TOP]        = "top",
132         [V4L2_FIELD_BOTTOM]     = "bottom",
133         [V4L2_FIELD_INTERLACED] = "interlaced",
134         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
135         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
136         [V4L2_FIELD_ALTERNATE]  = "alternate",
137         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
138         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
139 };
140 EXPORT_SYMBOL(v4l2_field_names);
141
142 const char *v4l2_type_names[] = {
143         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
144         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
145         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
146         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
147         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
148         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
149         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
150         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
151         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
153 };
154 EXPORT_SYMBOL(v4l2_type_names);
155
156 static const char *v4l2_memory_names[] = {
157         [V4L2_MEMORY_MMAP]    = "mmap",
158         [V4L2_MEMORY_USERPTR] = "userptr",
159         [V4L2_MEMORY_OVERLAY] = "overlay",
160         [V4L2_MEMORY_DMABUF] = "dmabuf",
161 };
162
163 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
164
165 /* ------------------------------------------------------------------ */
166 /* debug help functions                                               */
167
168 static void v4l_print_querycap(const void *arg, bool write_only)
169 {
170         const struct v4l2_capability *p = arg;
171
172         pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, "
173                 "capabilities=0x%08x, device_caps=0x%08x\n",
174                 (int)sizeof(p->driver), p->driver,
175                 (int)sizeof(p->card), p->card,
176                 (int)sizeof(p->bus_info), p->bus_info,
177                 p->version, p->capabilities, p->device_caps);
178 }
179
180 static void v4l_print_enuminput(const void *arg, bool write_only)
181 {
182         const struct v4l2_input *p = arg;
183
184         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, "
185                 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
186                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
187                 p->tuner, (unsigned long long)p->std, p->status,
188                 p->capabilities);
189 }
190
191 static void v4l_print_enumoutput(const void *arg, bool write_only)
192 {
193         const struct v4l2_output *p = arg;
194
195         pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, "
196                 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
197                 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
198                 p->modulator, (unsigned long long)p->std, p->capabilities);
199 }
200
201 static void v4l_print_audio(const void *arg, bool write_only)
202 {
203         const struct v4l2_audio *p = arg;
204
205         if (write_only)
206                 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
207         else
208                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
209                         p->index, (int)sizeof(p->name), p->name,
210                         p->capability, p->mode);
211 }
212
213 static void v4l_print_audioout(const void *arg, bool write_only)
214 {
215         const struct v4l2_audioout *p = arg;
216
217         if (write_only)
218                 pr_cont("index=%u\n", p->index);
219         else
220                 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
221                         p->index, (int)sizeof(p->name), p->name,
222                         p->capability, p->mode);
223 }
224
225 static void v4l_print_fmtdesc(const void *arg, bool write_only)
226 {
227         const struct v4l2_fmtdesc *p = arg;
228
229         pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
230                 p->index, prt_names(p->type, v4l2_type_names),
231                 p->flags, (p->pixelformat & 0xff),
232                 (p->pixelformat >>  8) & 0xff,
233                 (p->pixelformat >> 16) & 0xff,
234                 (p->pixelformat >> 24) & 0xff,
235                 (int)sizeof(p->description), p->description);
236 }
237
238 static void v4l_print_format(const void *arg, bool write_only)
239 {
240         const struct v4l2_format *p = arg;
241         const struct v4l2_pix_format *pix;
242         const struct v4l2_pix_format_mplane *mp;
243         const struct v4l2_vbi_format *vbi;
244         const struct v4l2_sliced_vbi_format *sliced;
245         const struct v4l2_window *win;
246         const struct v4l2_clip *clip;
247         unsigned i;
248
249         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
250         switch (p->type) {
251         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
252         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
253                 pix = &p->fmt.pix;
254                 pr_cont(", width=%u, height=%u, "
255                         "pixelformat=%c%c%c%c, field=%s, "
256                         "bytesperline=%u sizeimage=%u, colorspace=%d\n",
257                         pix->width, pix->height,
258                         (pix->pixelformat & 0xff),
259                         (pix->pixelformat >>  8) & 0xff,
260                         (pix->pixelformat >> 16) & 0xff,
261                         (pix->pixelformat >> 24) & 0xff,
262                         prt_names(pix->field, v4l2_field_names),
263                         pix->bytesperline, pix->sizeimage,
264                         pix->colorspace);
265                 break;
266         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
267         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
268                 mp = &p->fmt.pix_mp;
269                 pr_cont(", width=%u, height=%u, "
270                         "format=%c%c%c%c, field=%s, "
271                         "colorspace=%d, num_planes=%u\n",
272                         mp->width, mp->height,
273                         (mp->pixelformat & 0xff),
274                         (mp->pixelformat >>  8) & 0xff,
275                         (mp->pixelformat >> 16) & 0xff,
276                         (mp->pixelformat >> 24) & 0xff,
277                         prt_names(mp->field, v4l2_field_names),
278                         mp->colorspace, mp->num_planes);
279                 for (i = 0; i < mp->num_planes; i++)
280                         printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
281                                         mp->plane_fmt[i].bytesperline,
282                                         mp->plane_fmt[i].sizeimage);
283                 break;
284         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
285         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
286                 win = &p->fmt.win;
287                 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
288                         "chromakey=0x%08x, bitmap=%p, "
289                         "global_alpha=0x%02x\n",
290                         win->w.width, win->w.height,
291                         win->w.left, win->w.top,
292                         prt_names(win->field, v4l2_field_names),
293                         win->chromakey, win->bitmap, win->global_alpha);
294                 clip = win->clips;
295                 for (i = 0; i < win->clipcount; i++) {
296                         printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
297                                         i, clip->c.width, clip->c.height,
298                                         clip->c.left, clip->c.top);
299                         clip = clip->next;
300                 }
301                 break;
302         case V4L2_BUF_TYPE_VBI_CAPTURE:
303         case V4L2_BUF_TYPE_VBI_OUTPUT:
304                 vbi = &p->fmt.vbi;
305                 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
306                         "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
307                         vbi->sampling_rate, vbi->offset,
308                         vbi->samples_per_line,
309                         (vbi->sample_format & 0xff),
310                         (vbi->sample_format >>  8) & 0xff,
311                         (vbi->sample_format >> 16) & 0xff,
312                         (vbi->sample_format >> 24) & 0xff,
313                         vbi->start[0], vbi->start[1],
314                         vbi->count[0], vbi->count[1]);
315                 break;
316         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
317         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
318                 sliced = &p->fmt.sliced;
319                 pr_cont(", service_set=0x%08x, io_size=%d\n",
320                                 sliced->service_set, sliced->io_size);
321                 for (i = 0; i < 24; i++)
322                         printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
323                                 sliced->service_lines[0][i],
324                                 sliced->service_lines[1][i]);
325                 break;
326         }
327 }
328
329 static void v4l_print_framebuffer(const void *arg, bool write_only)
330 {
331         const struct v4l2_framebuffer *p = arg;
332
333         pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
334                 "height=%u, pixelformat=%c%c%c%c, "
335                 "bytesperline=%u sizeimage=%u, colorspace=%d\n",
336                         p->capability, p->flags, p->base,
337                         p->fmt.width, p->fmt.height,
338                         (p->fmt.pixelformat & 0xff),
339                         (p->fmt.pixelformat >>  8) & 0xff,
340                         (p->fmt.pixelformat >> 16) & 0xff,
341                         (p->fmt.pixelformat >> 24) & 0xff,
342                         p->fmt.bytesperline, p->fmt.sizeimage,
343                         p->fmt.colorspace);
344 }
345
346 static void v4l_print_buftype(const void *arg, bool write_only)
347 {
348         pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
349 }
350
351 static void v4l_print_modulator(const void *arg, bool write_only)
352 {
353         const struct v4l2_modulator *p = arg;
354
355         if (write_only)
356                 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
357         else
358                 pr_cont("index=%u, name=%.*s, capability=0x%x, "
359                         "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
360                         p->index, (int)sizeof(p->name), p->name, p->capability,
361                         p->rangelow, p->rangehigh, p->txsubchans);
362 }
363
364 static void v4l_print_tuner(const void *arg, bool write_only)
365 {
366         const struct v4l2_tuner *p = arg;
367
368         if (write_only)
369                 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
370         else
371                 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, "
372                         "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
373                         "rxsubchans=0x%x, audmode=%u\n",
374                         p->index, (int)sizeof(p->name), p->name, p->type,
375                         p->capability, p->rangelow,
376                         p->rangehigh, p->signal, p->afc,
377                         p->rxsubchans, p->audmode);
378 }
379
380 static void v4l_print_frequency(const void *arg, bool write_only)
381 {
382         const struct v4l2_frequency *p = arg;
383
384         pr_cont("tuner=%u, type=%u, frequency=%u\n",
385                                 p->tuner, p->type, p->frequency);
386 }
387
388 static void v4l_print_standard(const void *arg, bool write_only)
389 {
390         const struct v4l2_standard *p = arg;
391
392         pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, "
393                 "framelines=%u\n", p->index,
394                 (unsigned long long)p->id, (int)sizeof(p->name), p->name,
395                 p->frameperiod.numerator,
396                 p->frameperiod.denominator,
397                 p->framelines);
398 }
399
400 static void v4l_print_std(const void *arg, bool write_only)
401 {
402         pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
403 }
404
405 static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
406 {
407         const struct v4l2_hw_freq_seek *p = arg;
408
409         pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, "
410                 "rangelow=%u, rangehigh=%u\n",
411                 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
412                 p->rangelow, p->rangehigh);
413 }
414
415 static void v4l_print_requestbuffers(const void *arg, bool write_only)
416 {
417         const struct v4l2_requestbuffers *p = arg;
418
419         pr_cont("count=%d, type=%s, memory=%s\n",
420                 p->count,
421                 prt_names(p->type, v4l2_type_names),
422                 prt_names(p->memory, v4l2_memory_names));
423 }
424
425 static void v4l_print_buffer(const void *arg, bool write_only)
426 {
427         const struct v4l2_buffer *p = arg;
428         const struct v4l2_timecode *tc = &p->timecode;
429         const struct v4l2_plane *plane;
430         int i;
431
432         pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
433                 "flags=0x%08x, field=%s, sequence=%d, memory=%s",
434                         p->timestamp.tv_sec / 3600,
435                         (int)(p->timestamp.tv_sec / 60) % 60,
436                         (int)(p->timestamp.tv_sec % 60),
437                         (long)p->timestamp.tv_usec,
438                         p->index,
439                         prt_names(p->type, v4l2_type_names),
440                         p->flags, prt_names(p->field, v4l2_field_names),
441                         p->sequence, prt_names(p->memory, v4l2_memory_names));
442
443         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
444                 pr_cont("\n");
445                 for (i = 0; i < p->length; ++i) {
446                         plane = &p->m.planes[i];
447                         printk(KERN_DEBUG
448                                 "plane %d: bytesused=%d, data_offset=0x%08x "
449                                 "offset/userptr=0x%lx, length=%d\n",
450                                 i, plane->bytesused, plane->data_offset,
451                                 plane->m.userptr, plane->length);
452                 }
453         } else {
454                 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
455                         p->bytesused, p->m.userptr, p->length);
456         }
457
458         printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
459                 "flags=0x%08x, frames=%d, userbits=0x%08x\n",
460                         tc->hours, tc->minutes, tc->seconds,
461                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
462 }
463
464 static void v4l_print_exportbuffer(const void *arg, bool write_only)
465 {
466         const struct v4l2_exportbuffer *p = arg;
467
468         pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
469                 p->fd, prt_names(p->type, v4l2_type_names),
470                 p->index, p->plane, p->flags);
471 }
472
473 static void v4l_print_create_buffers(const void *arg, bool write_only)
474 {
475         const struct v4l2_create_buffers *p = arg;
476
477         pr_cont("index=%d, count=%d, memory=%s, ",
478                         p->index, p->count,
479                         prt_names(p->memory, v4l2_memory_names));
480         v4l_print_format(&p->format, write_only);
481 }
482
483 static void v4l_print_streamparm(const void *arg, bool write_only)
484 {
485         const struct v4l2_streamparm *p = arg;
486
487         pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
488
489         if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
490             p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
491                 const struct v4l2_captureparm *c = &p->parm.capture;
492
493                 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
494                         "extendedmode=%d, readbuffers=%d\n",
495                         c->capability, c->capturemode,
496                         c->timeperframe.numerator, c->timeperframe.denominator,
497                         c->extendedmode, c->readbuffers);
498         } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
499                    p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
500                 const struct v4l2_outputparm *c = &p->parm.output;
501
502                 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
503                         "extendedmode=%d, writebuffers=%d\n",
504                         c->capability, c->outputmode,
505                         c->timeperframe.numerator, c->timeperframe.denominator,
506                         c->extendedmode, c->writebuffers);
507         }
508 }
509
510 static void v4l_print_queryctrl(const void *arg, bool write_only)
511 {
512         const struct v4l2_queryctrl *p = arg;
513
514         pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, "
515                 "step=%d, default=%d, flags=0x%08x\n",
516                         p->id, p->type, (int)sizeof(p->name), p->name,
517                         p->minimum, p->maximum,
518                         p->step, p->default_value, p->flags);
519 }
520
521 static void v4l_print_querymenu(const void *arg, bool write_only)
522 {
523         const struct v4l2_querymenu *p = arg;
524
525         pr_cont("id=0x%x, index=%d\n", p->id, p->index);
526 }
527
528 static void v4l_print_control(const void *arg, bool write_only)
529 {
530         const struct v4l2_control *p = arg;
531
532         pr_cont("id=0x%x, value=%d\n", p->id, p->value);
533 }
534
535 static void v4l_print_ext_controls(const void *arg, bool write_only)
536 {
537         const struct v4l2_ext_controls *p = arg;
538         int i;
539
540         pr_cont("class=0x%x, count=%d, error_idx=%d",
541                         p->ctrl_class, p->count, p->error_idx);
542         for (i = 0; i < p->count; i++) {
543                 if (p->controls[i].size)
544                         pr_cont(", id/val=0x%x/0x%x",
545                                 p->controls[i].id, p->controls[i].value);
546                 else
547                         pr_cont(", id/size=0x%x/%u",
548                                 p->controls[i].id, p->controls[i].size);
549         }
550         pr_cont("\n");
551 }
552
553 static void v4l_print_cropcap(const void *arg, bool write_only)
554 {
555         const struct v4l2_cropcap *p = arg;
556
557         pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
558                 "defrect wxh=%dx%d, x,y=%d,%d\n, "
559                 "pixelaspect %d/%d\n",
560                 prt_names(p->type, v4l2_type_names),
561                 p->bounds.width, p->bounds.height,
562                 p->bounds.left, p->bounds.top,
563                 p->defrect.width, p->defrect.height,
564                 p->defrect.left, p->defrect.top,
565                 p->pixelaspect.numerator, p->pixelaspect.denominator);
566 }
567
568 static void v4l_print_crop(const void *arg, bool write_only)
569 {
570         const struct v4l2_crop *p = arg;
571
572         pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
573                 prt_names(p->type, v4l2_type_names),
574                 p->c.width, p->c.height,
575                 p->c.left, p->c.top);
576 }
577
578 static void v4l_print_selection(const void *arg, bool write_only)
579 {
580         const struct v4l2_selection *p = arg;
581
582         pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
583                 prt_names(p->type, v4l2_type_names),
584                 p->target, p->flags,
585                 p->r.width, p->r.height, p->r.left, p->r.top);
586 }
587
588 static void v4l_print_jpegcompression(const void *arg, bool write_only)
589 {
590         const struct v4l2_jpegcompression *p = arg;
591
592         pr_cont("quality=%d, APPn=%d, APP_len=%d, "
593                 "COM_len=%d, jpeg_markers=0x%x\n",
594                 p->quality, p->APPn, p->APP_len,
595                 p->COM_len, p->jpeg_markers);
596 }
597
598 static void v4l_print_enc_idx(const void *arg, bool write_only)
599 {
600         const struct v4l2_enc_idx *p = arg;
601
602         pr_cont("entries=%d, entries_cap=%d\n",
603                         p->entries, p->entries_cap);
604 }
605
606 static void v4l_print_encoder_cmd(const void *arg, bool write_only)
607 {
608         const struct v4l2_encoder_cmd *p = arg;
609
610         pr_cont("cmd=%d, flags=0x%x\n",
611                         p->cmd, p->flags);
612 }
613
614 static void v4l_print_decoder_cmd(const void *arg, bool write_only)
615 {
616         const struct v4l2_decoder_cmd *p = arg;
617
618         pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
619
620         if (p->cmd == V4L2_DEC_CMD_START)
621                 pr_info("speed=%d, format=%u\n",
622                                 p->start.speed, p->start.format);
623         else if (p->cmd == V4L2_DEC_CMD_STOP)
624                 pr_info("pts=%llu\n", p->stop.pts);
625 }
626
627 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
628 {
629         const struct v4l2_dbg_chip_ident *p = arg;
630
631         pr_cont("type=%u, ", p->match.type);
632         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
633                 pr_cont("name=%.*s, ",
634                                 (int)sizeof(p->match.name), p->match.name);
635         else
636                 pr_cont("addr=%u, ", p->match.addr);
637         pr_cont("chip_ident=%u, revision=0x%x\n",
638                         p->ident, p->revision);
639 }
640
641 static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
642 {
643         const struct v4l2_dbg_chip_info *p = arg;
644
645         pr_cont("type=%u, ", p->match.type);
646         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
647                 pr_cont("name=%.*s, ",
648                                 (int)sizeof(p->match.name), p->match.name);
649         else
650                 pr_cont("addr=%u, ", p->match.addr);
651         pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
652 }
653
654 static void v4l_print_dbg_register(const void *arg, bool write_only)
655 {
656         const struct v4l2_dbg_register *p = arg;
657
658         pr_cont("type=%u, ", p->match.type);
659         if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
660                 pr_cont("name=%.*s, ",
661                                 (int)sizeof(p->match.name), p->match.name);
662         else
663                 pr_cont("addr=%u, ", p->match.addr);
664         pr_cont("reg=0x%llx, val=0x%llx\n",
665                         p->reg, p->val);
666 }
667
668 static void v4l_print_dv_timings(const void *arg, bool write_only)
669 {
670         const struct v4l2_dv_timings *p = arg;
671
672         switch (p->type) {
673         case V4L2_DV_BT_656_1120:
674                 pr_cont("type=bt-656/1120, interlaced=%u, "
675                         "pixelclock=%llu, "
676                         "width=%u, height=%u, polarities=0x%x, "
677                         "hfrontporch=%u, hsync=%u, "
678                         "hbackporch=%u, vfrontporch=%u, "
679                         "vsync=%u, vbackporch=%u, "
680                         "il_vfrontporch=%u, il_vsync=%u, "
681                         "il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
682                                 p->bt.interlaced, p->bt.pixelclock,
683                                 p->bt.width, p->bt.height,
684                                 p->bt.polarities, p->bt.hfrontporch,
685                                 p->bt.hsync, p->bt.hbackporch,
686                                 p->bt.vfrontporch, p->bt.vsync,
687                                 p->bt.vbackporch, p->bt.il_vfrontporch,
688                                 p->bt.il_vsync, p->bt.il_vbackporch,
689                                 p->bt.standards, p->bt.flags);
690                 break;
691         default:
692                 pr_cont("type=%d\n", p->type);
693                 break;
694         }
695 }
696
697 static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
698 {
699         const struct v4l2_enum_dv_timings *p = arg;
700
701         pr_cont("index=%u, ", p->index);
702         v4l_print_dv_timings(&p->timings, write_only);
703 }
704
705 static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
706 {
707         const struct v4l2_dv_timings_cap *p = arg;
708
709         switch (p->type) {
710         case V4L2_DV_BT_656_1120:
711                 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
712                         "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
713                         p->bt.min_width, p->bt.max_width,
714                         p->bt.min_height, p->bt.max_height,
715                         p->bt.min_pixelclock, p->bt.max_pixelclock,
716                         p->bt.standards, p->bt.capabilities);
717                 break;
718         default:
719                 pr_cont("type=%u\n", p->type);
720                 break;
721         }
722 }
723
724 static void v4l_print_frmsizeenum(const void *arg, bool write_only)
725 {
726         const struct v4l2_frmsizeenum *p = arg;
727
728         pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
729                         p->index,
730                         (p->pixel_format & 0xff),
731                         (p->pixel_format >>  8) & 0xff,
732                         (p->pixel_format >> 16) & 0xff,
733                         (p->pixel_format >> 24) & 0xff,
734                         p->type);
735         switch (p->type) {
736         case V4L2_FRMSIZE_TYPE_DISCRETE:
737                 pr_cont(" wxh=%ux%u\n",
738                         p->discrete.width, p->discrete.height);
739                 break;
740         case V4L2_FRMSIZE_TYPE_STEPWISE:
741                 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n",
742                                 p->stepwise.min_width,  p->stepwise.min_height,
743                                 p->stepwise.step_width, p->stepwise.step_height,
744                                 p->stepwise.max_width,  p->stepwise.max_height);
745                 break;
746         case V4L2_FRMSIZE_TYPE_CONTINUOUS:
747                 /* fall through */
748         default:
749                 pr_cont("\n");
750                 break;
751         }
752 }
753
754 static void v4l_print_frmivalenum(const void *arg, bool write_only)
755 {
756         const struct v4l2_frmivalenum *p = arg;
757
758         pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
759                         p->index,
760                         (p->pixel_format & 0xff),
761                         (p->pixel_format >>  8) & 0xff,
762                         (p->pixel_format >> 16) & 0xff,
763                         (p->pixel_format >> 24) & 0xff,
764                         p->width, p->height, p->type);
765         switch (p->type) {
766         case V4L2_FRMIVAL_TYPE_DISCRETE:
767                 pr_cont(" fps=%d/%d\n",
768                                 p->discrete.numerator,
769                                 p->discrete.denominator);
770                 break;
771         case V4L2_FRMIVAL_TYPE_STEPWISE:
772                 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n",
773                                 p->stepwise.min.numerator,
774                                 p->stepwise.min.denominator,
775                                 p->stepwise.max.numerator,
776                                 p->stepwise.max.denominator,
777                                 p->stepwise.step.numerator,
778                                 p->stepwise.step.denominator);
779                 break;
780         case V4L2_FRMIVAL_TYPE_CONTINUOUS:
781                 /* fall through */
782         default:
783                 pr_cont("\n");
784                 break;
785         }
786 }
787
788 static void v4l_print_event(const void *arg, bool write_only)
789 {
790         const struct v4l2_event *p = arg;
791         const struct v4l2_event_ctrl *c;
792
793         pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
794                 "timestamp=%lu.%9.9lu\n",
795                         p->type, p->pending, p->sequence, p->id,
796                         p->timestamp.tv_sec, p->timestamp.tv_nsec);
797         switch (p->type) {
798         case V4L2_EVENT_VSYNC:
799                 printk(KERN_DEBUG "field=%s\n",
800                         prt_names(p->u.vsync.field, v4l2_field_names));
801                 break;
802         case V4L2_EVENT_CTRL:
803                 c = &p->u.ctrl;
804                 printk(KERN_DEBUG "changes=0x%x, type=%u, ",
805                         c->changes, c->type);
806                 if (c->type == V4L2_CTRL_TYPE_INTEGER64)
807                         pr_cont("value64=%lld, ", c->value64);
808                 else
809                         pr_cont("value=%d, ", c->value);
810                 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
811                                 " default_value=%d\n",
812                         c->flags, c->minimum, c->maximum,
813                         c->step, c->default_value);
814                 break;
815         case V4L2_EVENT_FRAME_SYNC:
816                 pr_cont("frame_sequence=%u\n",
817                         p->u.frame_sync.frame_sequence);
818                 break;
819         }
820 }
821
822 static void v4l_print_event_subscription(const void *arg, bool write_only)
823 {
824         const struct v4l2_event_subscription *p = arg;
825
826         pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
827                         p->type, p->id, p->flags);
828 }
829
830 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
831 {
832         const struct v4l2_sliced_vbi_cap *p = arg;
833         int i;
834
835         pr_cont("type=%s, service_set=0x%08x\n",
836                         prt_names(p->type, v4l2_type_names), p->service_set);
837         for (i = 0; i < 24; i++)
838                 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
839                                 p->service_lines[0][i],
840                                 p->service_lines[1][i]);
841 }
842
843 static void v4l_print_freq_band(const void *arg, bool write_only)
844 {
845         const struct v4l2_frequency_band *p = arg;
846
847         pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
848                         "rangelow=%u, rangehigh=%u, modulation=0x%x\n",
849                         p->tuner, p->type, p->index,
850                         p->capability, p->rangelow,
851                         p->rangehigh, p->modulation);
852 }
853
854 static void v4l_print_u32(const void *arg, bool write_only)
855 {
856         pr_cont("value=%u\n", *(const u32 *)arg);
857 }
858
859 static void v4l_print_newline(const void *arg, bool write_only)
860 {
861         pr_cont("\n");
862 }
863
864 static void v4l_print_default(const void *arg, bool write_only)
865 {
866         pr_cont("driver-specific ioctl\n");
867 }
868
869 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
870 {
871         __u32 i;
872
873         /* zero the reserved fields */
874         c->reserved[0] = c->reserved[1] = 0;
875         for (i = 0; i < c->count; i++)
876                 c->controls[i].reserved2[0] = 0;
877
878         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
879            when using extended controls.
880            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
881            is it allowed for backwards compatibility.
882          */
883         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
884                 return 0;
885         /* Check that all controls are from the same control class. */
886         for (i = 0; i < c->count; i++) {
887                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
888                         c->error_idx = i;
889                         return 0;
890                 }
891         }
892         return 1;
893 }
894
895 static int check_fmt(struct file *file, enum v4l2_buf_type type)
896 {
897         struct video_device *vfd = video_devdata(file);
898         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
899         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
900         bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
901         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
902         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
903
904         if (ops == NULL)
905                 return -EINVAL;
906
907         switch (type) {
908         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
909                 if (is_vid && is_rx &&
910                     (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
911                         return 0;
912                 break;
913         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
914                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
915                         return 0;
916                 break;
917         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
918                 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
919                         return 0;
920                 break;
921         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
922                 if (is_vid && is_tx &&
923                     (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
924                         return 0;
925                 break;
926         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
927                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
928                         return 0;
929                 break;
930         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
931                 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
932                         return 0;
933                 break;
934         case V4L2_BUF_TYPE_VBI_CAPTURE:
935                 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
936                         return 0;
937                 break;
938         case V4L2_BUF_TYPE_VBI_OUTPUT:
939                 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
940                         return 0;
941                 break;
942         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
943                 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
944                         return 0;
945                 break;
946         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
947                 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
948                         return 0;
949                 break;
950         default:
951                 break;
952         }
953         return -EINVAL;
954 }
955
956 static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
957                                 struct file *file, void *fh, void *arg)
958 {
959         struct v4l2_capability *cap = (struct v4l2_capability *)arg;
960
961         cap->version = LINUX_VERSION_CODE;
962         return ops->vidioc_querycap(file, fh, cap);
963 }
964
965 static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
966                                 struct file *file, void *fh, void *arg)
967 {
968         return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
969 }
970
971 static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
972                                 struct file *file, void *fh, void *arg)
973 {
974         return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
975 }
976
977 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
978                                 struct file *file, void *fh, void *arg)
979 {
980         struct video_device *vfd;
981         u32 *p = arg;
982
983         if (ops->vidioc_g_priority)
984                 return ops->vidioc_g_priority(file, fh, arg);
985         vfd = video_devdata(file);
986         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
987         return 0;
988 }
989
990 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
991                                 struct file *file, void *fh, void *arg)
992 {
993         struct video_device *vfd;
994         struct v4l2_fh *vfh;
995         u32 *p = arg;
996
997         if (ops->vidioc_s_priority)
998                 return ops->vidioc_s_priority(file, fh, *p);
999         vfd = video_devdata(file);
1000         vfh = file->private_data;
1001         return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
1002 }
1003
1004 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
1005                                 struct file *file, void *fh, void *arg)
1006 {
1007         struct video_device *vfd = video_devdata(file);
1008         struct v4l2_input *p = arg;
1009
1010         /*
1011          * We set the flags for CAP_DV_TIMINGS &
1012          * CAP_STD here based on ioctl handler provided by the
1013          * driver. If the driver doesn't support these
1014          * for a specific input, it must override these flags.
1015          */
1016         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1017                 p->capabilities |= V4L2_IN_CAP_STD;
1018
1019         return ops->vidioc_enum_input(file, fh, p);
1020 }
1021
1022 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
1023                                 struct file *file, void *fh, void *arg)
1024 {
1025         struct video_device *vfd = video_devdata(file);
1026         struct v4l2_output *p = arg;
1027
1028         /*
1029          * We set the flags for CAP_DV_TIMINGS &
1030          * CAP_STD here based on ioctl handler provided by the
1031          * driver. If the driver doesn't support these
1032          * for a specific output, it must override these flags.
1033          */
1034         if (is_valid_ioctl(vfd, VIDIOC_S_STD))
1035                 p->capabilities |= V4L2_OUT_CAP_STD;
1036
1037         return ops->vidioc_enum_output(file, fh, p);
1038 }
1039
1040 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
1041                                 struct file *file, void *fh, void *arg)
1042 {
1043         struct v4l2_fmtdesc *p = arg;
1044         struct video_device *vfd = video_devdata(file);
1045         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1046         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1047
1048         switch (p->type) {
1049         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1050                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap))
1051                         break;
1052                 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
1053         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1054                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane))
1055                         break;
1056                 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
1057         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1058                 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay))
1059                         break;
1060                 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
1061         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1062                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out))
1063                         break;
1064                 return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
1065         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1066                 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
1067                         break;
1068                 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
1069         }
1070         return -EINVAL;
1071 }
1072
1073 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
1074                                 struct file *file, void *fh, void *arg)
1075 {
1076         struct v4l2_format *p = arg;
1077         struct video_device *vfd = video_devdata(file);
1078         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1079         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1080         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1081
1082         switch (p->type) {
1083         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1084                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap))
1085                         break;
1086                 return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
1087         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1088                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
1089                         break;
1090                 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
1091         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1092                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
1093                         break;
1094                 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
1095         case V4L2_BUF_TYPE_VBI_CAPTURE:
1096                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
1097                         break;
1098                 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
1099         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1100                 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
1101                         break;
1102                 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
1103         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1104                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
1105                         break;
1106                 return ops->vidioc_g_fmt_vid_out(file, fh, arg);
1107         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1108                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
1109                         break;
1110                 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
1111         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1112                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
1113                         break;
1114                 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
1115         case V4L2_BUF_TYPE_VBI_OUTPUT:
1116                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
1117                         break;
1118                 return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
1119         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1120                 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
1121                         break;
1122                 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
1123         }
1124         return -EINVAL;
1125 }
1126
1127 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
1128                                 struct file *file, void *fh, void *arg)
1129 {
1130         struct v4l2_format *p = arg;
1131         struct video_device *vfd = video_devdata(file);
1132         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1133         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1134         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1135
1136         switch (p->type) {
1137         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1138                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap))
1139                         break;
1140                 CLEAR_AFTER_FIELD(p, fmt.pix);
1141                 return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
1142         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1143                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
1144                         break;
1145                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1146                 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
1147         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1148                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
1149                         break;
1150                 CLEAR_AFTER_FIELD(p, fmt.win);
1151                 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
1152         case V4L2_BUF_TYPE_VBI_CAPTURE:
1153                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
1154                         break;
1155                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1156                 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
1157         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1158                 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
1159                         break;
1160                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1161                 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
1162         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1163                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
1164                         break;
1165                 CLEAR_AFTER_FIELD(p, fmt.pix);
1166                 return ops->vidioc_s_fmt_vid_out(file, fh, arg);
1167         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1168                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
1169                         break;
1170                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1171                 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
1172         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1173                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
1174                         break;
1175                 CLEAR_AFTER_FIELD(p, fmt.win);
1176                 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
1177         case V4L2_BUF_TYPE_VBI_OUTPUT:
1178                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
1179                         break;
1180                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1181                 return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
1182         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1183                 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
1184                         break;
1185                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1186                 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
1187         }
1188         return -EINVAL;
1189 }
1190
1191 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
1192                                 struct file *file, void *fh, void *arg)
1193 {
1194         struct v4l2_format *p = arg;
1195         struct video_device *vfd = video_devdata(file);
1196         bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
1197         bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
1198         bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
1199
1200         switch (p->type) {
1201         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1202                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap))
1203                         break;
1204                 CLEAR_AFTER_FIELD(p, fmt.pix);
1205                 return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
1206         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1207                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
1208                         break;
1209                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1210                 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
1211         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1212                 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
1213                         break;
1214                 CLEAR_AFTER_FIELD(p, fmt.win);
1215                 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
1216         case V4L2_BUF_TYPE_VBI_CAPTURE:
1217                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
1218                         break;
1219                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1220                 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
1221         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1222                 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
1223                         break;
1224                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1225                 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
1226         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1227                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
1228                         break;
1229                 CLEAR_AFTER_FIELD(p, fmt.pix);
1230                 return ops->vidioc_try_fmt_vid_out(file, fh, arg);
1231         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1232                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
1233                         break;
1234                 CLEAR_AFTER_FIELD(p, fmt.pix_mp);
1235                 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
1236         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1237                 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
1238                         break;
1239                 CLEAR_AFTER_FIELD(p, fmt.win);
1240                 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
1241         case V4L2_BUF_TYPE_VBI_OUTPUT:
1242                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
1243                         break;
1244                 CLEAR_AFTER_FIELD(p, fmt.vbi);
1245                 return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
1246         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1247                 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
1248                         break;
1249                 CLEAR_AFTER_FIELD(p, fmt.sliced);
1250                 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
1251         }
1252         return -EINVAL;
1253 }
1254
1255 static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
1256                                 struct file *file, void *fh, void *arg)
1257 {
1258         return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
1259 }
1260
1261 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
1262                                 struct file *file, void *fh, void *arg)
1263 {
1264         return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
1265 }
1266
1267 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
1268                                 struct file *file, void *fh, void *arg)
1269 {
1270         struct video_device *vfd = video_devdata(file);
1271         struct v4l2_tuner *p = arg;
1272         int err;
1273
1274         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1275                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1276         err = ops->vidioc_g_tuner(file, fh, p);
1277         if (!err)
1278                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1279         return err;
1280 }
1281
1282 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
1283                                 struct file *file, void *fh, void *arg)
1284 {
1285         struct video_device *vfd = video_devdata(file);
1286         struct v4l2_tuner *p = arg;
1287
1288         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1289                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1290         return ops->vidioc_s_tuner(file, fh, p);
1291 }
1292
1293 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
1294                                 struct file *file, void *fh, void *arg)
1295 {
1296         struct v4l2_modulator *p = arg;
1297         int err;
1298
1299         err = ops->vidioc_g_modulator(file, fh, p);
1300         if (!err)
1301                 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
1302         return err;
1303 }
1304
1305 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
1306                                 struct file *file, void *fh, void *arg)
1307 {
1308         struct video_device *vfd = video_devdata(file);
1309         struct v4l2_frequency *p = arg;
1310
1311         p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1312                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1313         return ops->vidioc_g_frequency(file, fh, p);
1314 }
1315
1316 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
1317                                 struct file *file, void *fh, void *arg)
1318 {
1319         struct video_device *vfd = video_devdata(file);
1320         const struct v4l2_frequency *p = arg;
1321         enum v4l2_tuner_type type;
1322
1323         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1324                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1325         if (p->type != type)
1326                 return -EINVAL;
1327         return ops->vidioc_s_frequency(file, fh, p);
1328 }
1329
1330 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
1331                                 struct file *file, void *fh, void *arg)
1332 {
1333         struct video_device *vfd = video_devdata(file);
1334         struct v4l2_standard *p = arg;
1335         v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1336         unsigned int index = p->index, i, j = 0;
1337         const char *descr = "";
1338
1339         /* Return -ENODATA if the tvnorms for the current input
1340            or output is 0, meaning that it doesn't support this API. */
1341         if (id == 0)
1342                 return -ENODATA;
1343
1344         /* Return norm array in a canonical way */
1345         for (i = 0; i <= index && id; i++) {
1346                 /* last std value in the standards array is 0, so this
1347                    while always ends there since (id & 0) == 0. */
1348                 while ((id & standards[j].std) != standards[j].std)
1349                         j++;
1350                 curr_id = standards[j].std;
1351                 descr = standards[j].descr;
1352                 j++;
1353                 if (curr_id == 0)
1354                         break;
1355                 if (curr_id != V4L2_STD_PAL &&
1356                                 curr_id != V4L2_STD_SECAM &&
1357                                 curr_id != V4L2_STD_NTSC)
1358                         id &= ~curr_id;
1359         }
1360         if (i <= index)
1361                 return -EINVAL;
1362
1363         v4l2_video_std_construct(p, curr_id, descr);
1364         return 0;
1365 }
1366
1367 static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
1368                                 struct file *file, void *fh, void *arg)
1369 {
1370         struct video_device *vfd = video_devdata(file);
1371         v4l2_std_id *id = arg;
1372
1373         /* Calls the specific handler */
1374         if (ops->vidioc_g_std)
1375                 return ops->vidioc_g_std(file, fh, arg);
1376         if (vfd->current_norm) {
1377                 *id = vfd->current_norm;
1378                 return 0;
1379         }
1380         return -ENOTTY;
1381 }
1382
1383 static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
1384                                 struct file *file, void *fh, void *arg)
1385 {
1386         struct video_device *vfd = video_devdata(file);
1387         v4l2_std_id id = *(v4l2_std_id *)arg, norm;
1388         int ret;
1389
1390         norm = id & vfd->tvnorms;
1391         if (vfd->tvnorms && !norm)      /* Check if std is supported */
1392                 return -EINVAL;
1393
1394         /* Calls the specific handler */
1395         ret = ops->vidioc_s_std(file, fh, norm);
1396
1397         /* Updates standard information */
1398         if (ret >= 0)
1399                 vfd->current_norm = norm;
1400         return ret;
1401 }
1402
1403 static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
1404                                 struct file *file, void *fh, void *arg)
1405 {
1406         struct video_device *vfd = video_devdata(file);
1407         v4l2_std_id *p = arg;
1408
1409         /*
1410          * If nothing detected, it should return all supported
1411          * standard.
1412          * Drivers just need to mask the std argument, in order
1413          * to remove the standards that don't apply from the mask.
1414          * This means that tuners, audio and video decoders can join
1415          * their efforts to improve the standards detection.
1416          */
1417         *p = vfd->tvnorms;
1418         return ops->vidioc_querystd(file, fh, arg);
1419 }
1420
1421 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
1422                                 struct file *file, void *fh, void *arg)
1423 {
1424         struct video_device *vfd = video_devdata(file);
1425         struct v4l2_hw_freq_seek *p = arg;
1426         enum v4l2_tuner_type type;
1427
1428         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1429                 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1430         if (p->type != type)
1431                 return -EINVAL;
1432         return ops->vidioc_s_hw_freq_seek(file, fh, p);
1433 }
1434
1435 static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
1436                                 struct file *file, void *fh, void *arg)
1437 {
1438         return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
1439 }
1440
1441 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
1442                                 struct file *file, void *fh, void *arg)
1443 {
1444         struct v4l2_requestbuffers *p = arg;
1445         int ret = check_fmt(file, p->type);
1446
1447         if (ret)
1448                 return ret;
1449
1450         CLEAR_AFTER_FIELD(p, memory);
1451
1452         return ops->vidioc_reqbufs(file, fh, p);
1453 }
1454
1455 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
1456                                 struct file *file, void *fh, void *arg)
1457 {
1458         struct v4l2_buffer *p = arg;
1459         int ret = check_fmt(file, p->type);
1460
1461         return ret ? ret : ops->vidioc_querybuf(file, fh, p);
1462 }
1463
1464 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
1465                                 struct file *file, void *fh, void *arg)
1466 {
1467         struct v4l2_buffer *p = arg;
1468         int ret = check_fmt(file, p->type);
1469
1470         return ret ? ret : ops->vidioc_qbuf(file, fh, p);
1471 }
1472
1473 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
1474                                 struct file *file, void *fh, void *arg)
1475 {
1476         struct v4l2_buffer *p = arg;
1477         int ret = check_fmt(file, p->type);
1478
1479         return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
1480 }
1481
1482 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
1483                                 struct file *file, void *fh, void *arg)
1484 {
1485         struct v4l2_create_buffers *create = arg;
1486         int ret = check_fmt(file, create->format.type);
1487
1488         return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
1489 }
1490
1491 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
1492                                 struct file *file, void *fh, void *arg)
1493 {
1494         struct v4l2_buffer *b = arg;
1495         int ret = check_fmt(file, b->type);
1496
1497         return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
1498 }
1499
1500 static int v4l_g_parm(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_streamparm *p = arg;
1505         v4l2_std_id std;
1506         int ret = check_fmt(file, p->type);
1507
1508         if (ret)
1509                 return ret;
1510         if (ops->vidioc_g_parm)
1511                 return ops->vidioc_g_parm(file, fh, p);
1512         std = vfd->current_norm;
1513         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
1514             p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
1515                 return -EINVAL;
1516         p->parm.capture.readbuffers = 2;
1517         if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std)
1518                 ret = ops->vidioc_g_std(file, fh, &std);
1519         if (ret == 0)
1520                 v4l2_video_std_frame_period(std,
1521                             &p->parm.capture.timeperframe);
1522         return ret;
1523 }
1524
1525 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
1526                                 struct file *file, void *fh, void *arg)
1527 {
1528         struct v4l2_streamparm *p = arg;
1529         int ret = check_fmt(file, p->type);
1530
1531         return ret ? ret : ops->vidioc_s_parm(file, fh, p);
1532 }
1533
1534 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
1535                                 struct file *file, void *fh, void *arg)
1536 {
1537         struct video_device *vfd = video_devdata(file);
1538         struct v4l2_queryctrl *p = arg;
1539         struct v4l2_fh *vfh =
1540                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1541
1542         if (vfh && vfh->ctrl_handler)
1543                 return v4l2_queryctrl(vfh->ctrl_handler, p);
1544         if (vfd->ctrl_handler)
1545                 return v4l2_queryctrl(vfd->ctrl_handler, p);
1546         if (ops->vidioc_queryctrl)
1547                 return ops->vidioc_queryctrl(file, fh, p);
1548         return -ENOTTY;
1549 }
1550
1551 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
1552                                 struct file *file, void *fh, void *arg)
1553 {
1554         struct video_device *vfd = video_devdata(file);
1555         struct v4l2_querymenu *p = arg;
1556         struct v4l2_fh *vfh =
1557                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1558
1559         if (vfh && vfh->ctrl_handler)
1560                 return v4l2_querymenu(vfh->ctrl_handler, p);
1561         if (vfd->ctrl_handler)
1562                 return v4l2_querymenu(vfd->ctrl_handler, p);
1563         if (ops->vidioc_querymenu)
1564                 return ops->vidioc_querymenu(file, fh, p);
1565         return -ENOTTY;
1566 }
1567
1568 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
1569                                 struct file *file, void *fh, void *arg)
1570 {
1571         struct video_device *vfd = video_devdata(file);
1572         struct v4l2_control *p = arg;
1573         struct v4l2_fh *vfh =
1574                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1575         struct v4l2_ext_controls ctrls;
1576         struct v4l2_ext_control ctrl;
1577
1578         if (vfh && vfh->ctrl_handler)
1579                 return v4l2_g_ctrl(vfh->ctrl_handler, p);
1580         if (vfd->ctrl_handler)
1581                 return v4l2_g_ctrl(vfd->ctrl_handler, p);
1582         if (ops->vidioc_g_ctrl)
1583                 return ops->vidioc_g_ctrl(file, fh, p);
1584         if (ops->vidioc_g_ext_ctrls == NULL)
1585                 return -ENOTTY;
1586
1587         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1588         ctrls.count = 1;
1589         ctrls.controls = &ctrl;
1590         ctrl.id = p->id;
1591         ctrl.value = p->value;
1592         if (check_ext_ctrls(&ctrls, 1)) {
1593                 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1594
1595                 if (ret == 0)
1596                         p->value = ctrl.value;
1597                 return ret;
1598         }
1599         return -EINVAL;
1600 }
1601
1602 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
1603                                 struct file *file, void *fh, void *arg)
1604 {
1605         struct video_device *vfd = video_devdata(file);
1606         struct v4l2_control *p = arg;
1607         struct v4l2_fh *vfh =
1608                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1609         struct v4l2_ext_controls ctrls;
1610         struct v4l2_ext_control ctrl;
1611
1612         if (vfh && vfh->ctrl_handler)
1613                 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1614         if (vfd->ctrl_handler)
1615                 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1616         if (ops->vidioc_s_ctrl)
1617                 return ops->vidioc_s_ctrl(file, fh, p);
1618         if (ops->vidioc_s_ext_ctrls == NULL)
1619                 return -ENOTTY;
1620
1621         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1622         ctrls.count = 1;
1623         ctrls.controls = &ctrl;
1624         ctrl.id = p->id;
1625         ctrl.value = p->value;
1626         if (check_ext_ctrls(&ctrls, 1))
1627                 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1628         return -EINVAL;
1629 }
1630
1631 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1632                                 struct file *file, void *fh, void *arg)
1633 {
1634         struct video_device *vfd = video_devdata(file);
1635         struct v4l2_ext_controls *p = arg;
1636         struct v4l2_fh *vfh =
1637                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1638
1639         p->error_idx = p->count;
1640         if (vfh && vfh->ctrl_handler)
1641                 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1642         if (vfd->ctrl_handler)
1643                 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1644         if (ops->vidioc_g_ext_ctrls == NULL)
1645                 return -ENOTTY;
1646         return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
1647                                         -EINVAL;
1648 }
1649
1650 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1651                                 struct file *file, void *fh, void *arg)
1652 {
1653         struct video_device *vfd = video_devdata(file);
1654         struct v4l2_ext_controls *p = arg;
1655         struct v4l2_fh *vfh =
1656                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1657
1658         p->error_idx = p->count;
1659         if (vfh && vfh->ctrl_handler)
1660                 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1661         if (vfd->ctrl_handler)
1662                 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1663         if (ops->vidioc_s_ext_ctrls == NULL)
1664                 return -ENOTTY;
1665         return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
1666                                         -EINVAL;
1667 }
1668
1669 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
1670                                 struct file *file, void *fh, void *arg)
1671 {
1672         struct video_device *vfd = video_devdata(file);
1673         struct v4l2_ext_controls *p = arg;
1674         struct v4l2_fh *vfh =
1675                 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
1676
1677         p->error_idx = p->count;
1678         if (vfh && vfh->ctrl_handler)
1679                 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1680         if (vfd->ctrl_handler)
1681                 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1682         if (ops->vidioc_try_ext_ctrls == NULL)
1683                 return -ENOTTY;
1684         return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
1685                                         -EINVAL;
1686 }
1687
1688 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
1689                                 struct file *file, void *fh, void *arg)
1690 {
1691         struct v4l2_crop *p = arg;
1692         struct v4l2_selection s = {
1693                 .type = p->type,
1694         };
1695         int ret;
1696
1697         if (ops->vidioc_g_crop)
1698                 return ops->vidioc_g_crop(file, fh, p);
1699         /* simulate capture crop using selection api */
1700
1701         /* crop means compose for output devices */
1702         if (V4L2_TYPE_IS_OUTPUT(p->type))
1703                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1704         else
1705                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1706
1707         ret = ops->vidioc_g_selection(file, fh, &s);
1708
1709         /* copying results to old structure on success */
1710         if (!ret)
1711                 p->c = s.r;
1712         return ret;
1713 }
1714
1715 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
1716                                 struct file *file, void *fh, void *arg)
1717 {
1718         struct v4l2_crop *p = arg;
1719         struct v4l2_selection s = {
1720                 .type = p->type,
1721                 .r = p->c,
1722         };
1723
1724         if (ops->vidioc_s_crop)
1725                 return ops->vidioc_s_crop(file, fh, p);
1726         /* simulate capture crop using selection api */
1727
1728         /* crop means compose for output devices */
1729         if (V4L2_TYPE_IS_OUTPUT(p->type))
1730                 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1731         else
1732                 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1733
1734         return ops->vidioc_s_selection(file, fh, &s);
1735 }
1736
1737 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
1738                                 struct file *file, void *fh, void *arg)
1739 {
1740         struct v4l2_cropcap *p = arg;
1741         struct v4l2_selection s = { .type = p->type };
1742         int ret;
1743
1744         if (ops->vidioc_cropcap)
1745                 return ops->vidioc_cropcap(file, fh, p);
1746
1747         /* obtaining bounds */
1748         if (V4L2_TYPE_IS_OUTPUT(p->type))
1749                 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1750         else
1751                 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1752
1753         ret = ops->vidioc_g_selection(file, fh, &s);
1754         if (ret)
1755                 return ret;
1756         p->bounds = s.r;
1757
1758         /* obtaining defrect */
1759         if (V4L2_TYPE_IS_OUTPUT(p->type))
1760                 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1761         else
1762                 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1763
1764         ret = ops->vidioc_g_selection(file, fh, &s);
1765         if (ret)
1766                 return ret;
1767         p->defrect = s.r;
1768
1769         /* setting trivial pixelaspect */
1770         p->pixelaspect.numerator = 1;
1771         p->pixelaspect.denominator = 1;
1772         return 0;
1773 }
1774
1775 static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
1776                                 struct file *file, void *fh, void *arg)
1777 {
1778         struct video_device *vfd = video_devdata(file);
1779         int ret;
1780
1781         if (vfd->v4l2_dev)
1782                 pr_info("%s: =================  START STATUS  =================\n",
1783                         vfd->v4l2_dev->name);
1784         ret = ops->vidioc_log_status(file, fh);
1785         if (vfd->v4l2_dev)
1786                 pr_info("%s: ==================  END STATUS  ==================\n",
1787                         vfd->v4l2_dev->name);
1788         return ret;
1789 }
1790
1791 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
1792                                 struct file *file, void *fh, void *arg)
1793 {
1794 #ifdef CONFIG_VIDEO_ADV_DEBUG
1795         struct v4l2_dbg_register *p = arg;
1796         struct video_device *vfd = video_devdata(file);
1797         struct v4l2_subdev *sd;
1798         int idx = 0;
1799
1800         if (!capable(CAP_SYS_ADMIN))
1801                 return -EPERM;
1802         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1803                 if (vfd->v4l2_dev == NULL)
1804                         return -EINVAL;
1805                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1806                         if (p->match.addr == idx++)
1807                                 return v4l2_subdev_call(sd, core, g_register, p);
1808                 return -EINVAL;
1809         }
1810         if (ops->vidioc_g_register)
1811                 return ops->vidioc_g_register(file, fh, p);
1812         return -EINVAL;
1813 #else
1814         return -ENOTTY;
1815 #endif
1816 }
1817
1818 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
1819                                 struct file *file, void *fh, void *arg)
1820 {
1821 #ifdef CONFIG_VIDEO_ADV_DEBUG
1822         const struct v4l2_dbg_register *p = arg;
1823         struct video_device *vfd = video_devdata(file);
1824         struct v4l2_subdev *sd;
1825         int idx = 0;
1826
1827         if (!capable(CAP_SYS_ADMIN))
1828                 return -EPERM;
1829         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
1830                 if (vfd->v4l2_dev == NULL)
1831                         return -EINVAL;
1832                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
1833                         if (p->match.addr == idx++)
1834                                 return v4l2_subdev_call(sd, core, s_register, p);
1835                 return -EINVAL;
1836         }
1837         if (ops->vidioc_s_register)
1838                 return ops->vidioc_s_register(file, fh, p);
1839         return -EINVAL;
1840 #else
1841         return -ENOTTY;
1842 #endif
1843 }
1844
1845 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
1846                                 struct file *file, void *fh, void *arg)
1847 {
1848         struct v4l2_dbg_chip_ident *p = arg;
1849
1850         p->ident = V4L2_IDENT_NONE;
1851         p->revision = 0;
1852         if (p->match.type == V4L2_CHIP_MATCH_SUBDEV)
1853                 return -EINVAL;
1854         return ops->vidioc_g_chip_ident(file, fh, p);
1855 }
1856
1857 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
1858                                 struct file *file, void *fh, void *arg)
1859 {
1860 #ifdef CONFIG_VIDEO_ADV_DEBUG
1861         struct video_device *vfd = video_devdata(file);
1862         struct v4l2_dbg_chip_info *p = arg;
1863         struct v4l2_subdev *sd;
1864         int idx = 0;
1865
1866         switch (p->match.type) {
1867         case V4L2_CHIP_MATCH_BRIDGE:
1868                 if (ops->vidioc_s_register)
1869                         p->flags |= V4L2_CHIP_FL_WRITABLE;
1870                 if (ops->vidioc_g_register)
1871                         p->flags |= V4L2_CHIP_FL_READABLE;
1872                 if (vfd->v4l2_dev)
1873                         strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
1874                 else if (vfd->parent)
1875                         strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name));
1876                 else
1877                         strlcpy(p->name, "bridge", sizeof(p->name));
1878                 if (ops->vidioc_g_chip_info)
1879                         return ops->vidioc_g_chip_info(file, fh, arg);
1880                 if (p->match.addr)
1881                         return -EINVAL;
1882                 return 0;
1883
1884         case V4L2_CHIP_MATCH_SUBDEV:
1885                 if (vfd->v4l2_dev == NULL)
1886                         break;
1887                 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
1888                         if (p->match.addr != idx++)
1889                                 continue;
1890                         if (sd->ops->core && sd->ops->core->s_register)
1891                                 p->flags |= V4L2_CHIP_FL_WRITABLE;
1892                         if (sd->ops->core && sd->ops->core->g_register)
1893                                 p->flags |= V4L2_CHIP_FL_READABLE;
1894                         strlcpy(p->name, sd->name, sizeof(p->name));
1895                         return 0;
1896                 }
1897                 break;
1898         }
1899         return -EINVAL;
1900 #else
1901         return -ENOTTY;
1902 #endif
1903 }
1904
1905 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
1906                                 struct file *file, void *fh, void *arg)
1907 {
1908         return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
1909 }
1910
1911 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
1912                                 struct file *file, void *fh, void *arg)
1913 {
1914         return ops->vidioc_subscribe_event(fh, arg);
1915 }
1916
1917 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
1918                                 struct file *file, void *fh, void *arg)
1919 {
1920         return ops->vidioc_unsubscribe_event(fh, arg);
1921 }
1922
1923 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
1924                                 struct file *file, void *fh, void *arg)
1925 {
1926         struct v4l2_sliced_vbi_cap *p = arg;
1927         int ret = check_fmt(file, p->type);
1928
1929         if (ret)
1930                 return ret;
1931
1932         /* Clear up to type, everything after type is zeroed already */
1933         memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1934
1935         return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1936 }
1937
1938 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
1939                                 struct file *file, void *fh, void *arg)
1940 {
1941         struct video_device *vfd = video_devdata(file);
1942         struct v4l2_frequency_band *p = arg;
1943         enum v4l2_tuner_type type;
1944         int err;
1945
1946         type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1947                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1948
1949         if (type != p->type)
1950                 return -EINVAL;
1951         if (ops->vidioc_enum_freq_bands)
1952                 return ops->vidioc_enum_freq_bands(file, fh, p);
1953         if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
1954                 struct v4l2_tuner t = {
1955                         .index = p->tuner,
1956                         .type = type,
1957                 };
1958
1959                 if (p->index)
1960                         return -EINVAL;
1961                 err = ops->vidioc_g_tuner(file, fh, &t);
1962                 if (err)
1963                         return err;
1964                 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1965                 p->rangelow = t.rangelow;
1966                 p->rangehigh = t.rangehigh;
1967                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1968                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1969                 return 0;
1970         }
1971         if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
1972                 struct v4l2_modulator m = {
1973                         .index = p->tuner,
1974                 };
1975
1976                 if (type != V4L2_TUNER_RADIO)
1977                         return -EINVAL;
1978                 if (p->index)
1979                         return -EINVAL;
1980                 err = ops->vidioc_g_modulator(file, fh, &m);
1981                 if (err)
1982                         return err;
1983                 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
1984                 p->rangelow = m.rangelow;
1985                 p->rangehigh = m.rangehigh;
1986                 p->modulation = (type == V4L2_TUNER_RADIO) ?
1987                         V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
1988                 return 0;
1989         }
1990         return -ENOTTY;
1991 }
1992
1993 struct v4l2_ioctl_info {
1994         unsigned int ioctl;
1995         u32 flags;
1996         const char * const name;
1997         union {
1998                 u32 offset;
1999                 int (*func)(const struct v4l2_ioctl_ops *ops,
2000                                 struct file *file, void *fh, void *p);
2001         } u;
2002         void (*debug)(const void *arg, bool write_only);
2003 };
2004
2005 /* This control needs a priority check */
2006 #define INFO_FL_PRIO    (1 << 0)
2007 /* This control can be valid if the filehandle passes a control handler. */
2008 #define INFO_FL_CTRL    (1 << 1)
2009 /* This is a standard ioctl, no need for special code */
2010 #define INFO_FL_STD     (1 << 2)
2011 /* This is ioctl has its own function */
2012 #define INFO_FL_FUNC    (1 << 3)
2013 /* Queuing ioctl */
2014 #define INFO_FL_QUEUE   (1 << 4)
2015 /* Zero struct from after the field to the end */
2016 #define INFO_FL_CLEAR(v4l2_struct, field)                       \
2017         ((offsetof(struct v4l2_struct, field) +                 \
2018           sizeof(((struct v4l2_struct *)0)->field)) << 16)
2019 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
2020
2021 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)                 \
2022         [_IOC_NR(_ioctl)] = {                                           \
2023                 .ioctl = _ioctl,                                        \
2024                 .flags = _flags | INFO_FL_STD,                          \
2025                 .name = #_ioctl,                                        \
2026                 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),   \
2027                 .debug = _debug,                                        \
2028         }
2029
2030 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)                   \
2031         [_IOC_NR(_ioctl)] = {                                           \
2032                 .ioctl = _ioctl,                                        \
2033                 .flags = _flags | INFO_FL_FUNC,                         \
2034                 .name = #_ioctl,                                        \
2035                 .u.func = _func,                                        \
2036                 .debug = _debug,                                        \
2037         }
2038
2039 static struct v4l2_ioctl_info v4l2_ioctls[] = {
2040         IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
2041         IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
2042         IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
2043         IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
2044         IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2045         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
2046         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
2047         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
2048         IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
2049         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
2050         IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
2051         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
2052         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2053         IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
2054         IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
2055         IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
2056         IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
2057         IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
2058         IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
2059         IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
2060         IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
2061         IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
2062         IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
2063         IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
2064         IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
2065         IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
2066         IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
2067         IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
2068         IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
2069         IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
2070         IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
2071         IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
2072         IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
2073         IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
2074         IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
2075         IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
2076         IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
2077         IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
2078         IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
2079         IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
2080         IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
2081         IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
2082         IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
2083         IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
2084         IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
2085         IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
2086         IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
2087         IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
2088         IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
2089         IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
2090         IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
2091         IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
2092         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)),
2093         IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
2094         IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2095         IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
2096         IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
2097         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
2098         IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
2099         IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
2100         IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2101         IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
2102         IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
2103         IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
2104         IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
2105         IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
2106         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
2107         IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
2108         IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
2109         IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
2110         IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
2111         IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
2112         IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
2113         IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
2114         IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
2115         IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
2116         IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
2117         IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
2118         IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
2119         IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
2120 };
2121 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
2122
2123 bool v4l2_is_known_ioctl(unsigned int cmd)
2124 {
2125         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2126                 return false;
2127         return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
2128 }
2129
2130 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
2131 {
2132         if (_IOC_NR(cmd) >= V4L2_IOCTLS)
2133                 return vdev->lock;
2134         if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
2135                 return NULL;
2136         if (vdev->queue && vdev->queue->lock &&
2137                         (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
2138                 return vdev->queue->lock;
2139         return vdev->lock;
2140 }
2141
2142 /* Common ioctl debug function. This function can be used by
2143    external ioctl messages as well as internal V4L ioctl */
2144 void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
2145 {
2146         const char *dir, *type;
2147
2148         if (prefix)
2149                 printk(KERN_DEBUG "%s: ", prefix);
2150
2151         switch (_IOC_TYPE(cmd)) {
2152         case 'd':
2153                 type = "v4l2_int";
2154                 break;
2155         case 'V':
2156                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
2157                         type = "v4l2";
2158                         break;
2159                 }
2160                 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
2161                 return;
2162         default:
2163                 type = "unknown";
2164                 break;
2165         }
2166
2167         switch (_IOC_DIR(cmd)) {
2168         case _IOC_NONE:              dir = "--"; break;
2169         case _IOC_READ:              dir = "r-"; break;
2170         case _IOC_WRITE:             dir = "-w"; break;
2171         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
2172         default:                     dir = "*ERR*"; break;
2173         }
2174         pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
2175                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
2176 }
2177 EXPORT_SYMBOL(v4l_printk_ioctl);
2178
2179 static long __video_do_ioctl(struct file *file,
2180                 unsigned int cmd, void *arg)
2181 {
2182         struct video_device *vfd = video_devdata(file);
2183         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
2184         bool write_only = false;
2185         struct v4l2_ioctl_info default_info;
2186         const struct v4l2_ioctl_info *info;
2187         void *fh = file->private_data;
2188         struct v4l2_fh *vfh = NULL;
2189         int use_fh_prio = 0;
2190         int debug = vfd->debug;
2191         long ret = -ENOTTY;
2192
2193         if (ops == NULL) {
2194                 pr_warn("%s: has no ioctl_ops.\n",
2195                                 video_device_node_name(vfd));
2196                 return ret;
2197         }
2198
2199         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
2200                 vfh = file->private_data;
2201                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
2202         }
2203
2204         if (v4l2_is_known_ioctl(cmd)) {
2205                 info = &v4l2_ioctls[_IOC_NR(cmd)];
2206
2207                 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
2208                     !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
2209                         goto done;
2210
2211                 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
2212                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
2213                         if (ret)
2214                                 goto done;
2215                 }
2216         } else {
2217                 default_info.ioctl = cmd;
2218                 default_info.flags = 0;
2219                 default_info.debug = v4l_print_default;
2220                 info = &default_info;
2221         }
2222
2223         write_only = _IOC_DIR(cmd) == _IOC_WRITE;
2224         if (info->flags & INFO_FL_STD) {
2225                 typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
2226                 const void *p = vfd->ioctl_ops;
2227                 const vidioc_op *vidioc = p + info->u.offset;
2228
2229                 ret = (*vidioc)(file, fh, arg);
2230         } else if (info->flags & INFO_FL_FUNC) {
2231                 ret = info->u.func(ops, file, fh, arg);
2232         } else if (!ops->vidioc_default) {
2233                 ret = -ENOTTY;
2234         } else {
2235                 ret = ops->vidioc_default(file, fh,
2236                         use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
2237                         cmd, arg);
2238         }
2239
2240 done:
2241         if (debug) {
2242                 v4l_printk_ioctl(video_device_node_name(vfd), cmd);
2243                 if (ret < 0)
2244                         pr_cont(": error %ld", ret);
2245                 if (debug == V4L2_DEBUG_IOCTL)
2246                         pr_cont("\n");
2247                 else if (_IOC_DIR(cmd) == _IOC_NONE)
2248                         info->debug(arg, write_only);
2249                 else {
2250                         pr_cont(": ");
2251                         info->debug(arg, write_only);
2252                 }
2253         }
2254
2255         return ret;
2256 }
2257
2258 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2259                             void * __user *user_ptr, void ***kernel_ptr)
2260 {
2261         int ret = 0;
2262
2263         switch (cmd) {
2264         case VIDIOC_PREPARE_BUF:
2265         case VIDIOC_QUERYBUF:
2266         case VIDIOC_QBUF:
2267         case VIDIOC_DQBUF: {
2268                 struct v4l2_buffer *buf = parg;
2269
2270                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2271                         if (buf->length > VIDEO_MAX_PLANES) {
2272                                 ret = -EINVAL;
2273                                 break;
2274                         }
2275                         *user_ptr = (void __user *)buf->m.planes;
2276                         *kernel_ptr = (void *)&buf->m.planes;
2277                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2278                         ret = 1;
2279                 }
2280                 break;
2281         }
2282
2283         case VIDIOC_SUBDEV_G_EDID:
2284         case VIDIOC_SUBDEV_S_EDID: {
2285                 struct v4l2_subdev_edid *edid = parg;
2286
2287                 if (edid->blocks) {
2288                         if (edid->blocks > 256) {
2289                                 ret = -EINVAL;
2290                                 break;
2291                         }
2292                         *user_ptr = (void __user *)edid->edid;
2293                         *kernel_ptr = (void *)&edid->edid;
2294                         *array_size = edid->blocks * 128;
2295                         ret = 1;
2296                 }
2297                 break;
2298         }
2299
2300         case VIDIOC_S_EXT_CTRLS:
2301         case VIDIOC_G_EXT_CTRLS:
2302         case VIDIOC_TRY_EXT_CTRLS: {
2303                 struct v4l2_ext_controls *ctrls = parg;
2304
2305                 if (ctrls->count != 0) {
2306                         if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2307                                 ret = -EINVAL;
2308                                 break;
2309                         }
2310                         *user_ptr = (void __user *)ctrls->controls;
2311                         *kernel_ptr = (void *)&ctrls->controls;
2312                         *array_size = sizeof(struct v4l2_ext_control)
2313                                     * ctrls->count;
2314                         ret = 1;
2315                 }
2316                 break;
2317         }
2318         }
2319
2320         return ret;
2321 }
2322
2323 long
2324 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2325                v4l2_kioctl func)
2326 {
2327         char    sbuf[128];
2328         void    *mbuf = NULL;
2329         void    *parg = (void *)arg;
2330         long    err  = -EINVAL;
2331         bool    has_array_args;
2332         size_t  array_size = 0;
2333         void __user *user_ptr = NULL;
2334         void    **kernel_ptr = NULL;
2335
2336         /*  Copy arguments into temp kernel buffer  */
2337         if (_IOC_DIR(cmd) != _IOC_NONE) {
2338                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2339                         parg = sbuf;
2340                 } else {
2341                         /* too big to allocate from stack */
2342                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2343                         if (NULL == mbuf)
2344                                 return -ENOMEM;
2345                         parg = mbuf;
2346                 }
2347
2348                 err = -EFAULT;
2349                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2350                         unsigned int n = _IOC_SIZE(cmd);
2351
2352                         /*
2353                          * In some cases, only a few fields are used as input,
2354                          * i.e. when the app sets "index" and then the driver
2355                          * fills in the rest of the structure for the thing
2356                          * with that index.  We only need to copy up the first
2357                          * non-input field.
2358                          */
2359                         if (v4l2_is_known_ioctl(cmd)) {
2360                                 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
2361                                 if (flags & INFO_FL_CLEAR_MASK)
2362                                         n = (flags & INFO_FL_CLEAR_MASK) >> 16;
2363                         }
2364
2365                         if (copy_from_user(parg, (void __user *)arg, n))
2366                                 goto out;
2367
2368                         /* zero out anything we don't copy from userspace */
2369                         if (n < _IOC_SIZE(cmd))
2370                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2371                 } else {
2372                         /* read-only ioctl */
2373                         memset(parg, 0, _IOC_SIZE(cmd));
2374                 }
2375         }
2376
2377         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2378         if (err < 0)
2379                 goto out;
2380         has_array_args = err;
2381
2382         if (has_array_args) {
2383                 /*
2384                  * When adding new types of array args, make sure that the
2385                  * parent argument to ioctl (which contains the pointer to the
2386                  * array) fits into sbuf (so that mbuf will still remain
2387                  * unused up to here).
2388                  */
2389                 mbuf = kmalloc(array_size, GFP_KERNEL);
2390                 err = -ENOMEM;
2391                 if (NULL == mbuf)
2392                         goto out_array_args;
2393                 err = -EFAULT;
2394                 if (copy_from_user(mbuf, user_ptr, array_size))
2395                         goto out_array_args;
2396                 *kernel_ptr = mbuf;
2397         }
2398
2399         /* Handles IOCTL */
2400         err = func(file, cmd, parg);
2401         if (err == -ENOIOCTLCMD)
2402                 err = -ENOTTY;
2403
2404         if (has_array_args) {
2405                 *kernel_ptr = user_ptr;
2406                 if (copy_to_user(user_ptr, mbuf, array_size))
2407                         err = -EFAULT;
2408                 goto out_array_args;
2409         }
2410         /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
2411            results that must be returned. */
2412         if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
2413                 goto out;
2414
2415 out_array_args:
2416         /*  Copy results into user buffer  */
2417         switch (_IOC_DIR(cmd)) {
2418         case _IOC_READ:
2419         case (_IOC_WRITE | _IOC_READ):
2420                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2421                         err = -EFAULT;
2422                 break;
2423         }
2424
2425 out:
2426         kfree(mbuf);
2427         return err;
2428 }
2429 EXPORT_SYMBOL(video_usercopy);
2430
2431 long video_ioctl2(struct file *file,
2432                unsigned int cmd, unsigned long arg)
2433 {
2434         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2435 }
2436 EXPORT_SYMBOL(video_ioctl2);