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[pohmelfs.git] / drivers / media / video / v4l2-ioctl.c
blob3f623859a337126aa035df7c00817a6ad5da6fee
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
31 #define dbgarg(cmd, fmt, arg...) \
32 do { \
33 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \
34 printk(KERN_DEBUG "%s: ", vfd->name); \
35 v4l_printk_ioctl(cmd); \
36 printk(" " fmt, ## arg); \
37 } \
38 } while (0)
39
40 #define dbgarg2(fmt, arg...) \
41 do { \
42 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
43 printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
44 } while (0)
45
46 #define dbgarg3(fmt, arg...) \
47 do { \
48 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
49 printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
50 } while (0)
51
52 /* Zero out the end of the struct pointed to by p. Everything after, but
53 * not including, the specified field is cleared. */
54 #define CLEAR_AFTER_FIELD(p, field) \
55 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
56 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
57
58 #define have_fmt_ops(foo) ( \
59 ops->vidioc_##foo##_fmt_vid_cap || \
60 ops->vidioc_##foo##_fmt_vid_out || \
61 ops->vidioc_##foo##_fmt_vid_cap_mplane || \
62 ops->vidioc_##foo##_fmt_vid_out_mplane || \
63 ops->vidioc_##foo##_fmt_vid_overlay || \
64 ops->vidioc_##foo##_fmt_vbi_cap || \
65 ops->vidioc_##foo##_fmt_vid_out_overlay || \
66 ops->vidioc_##foo##_fmt_vbi_out || \
67 ops->vidioc_##foo##_fmt_sliced_vbi_cap || \
68 ops->vidioc_##foo##_fmt_sliced_vbi_out || \
69 ops->vidioc_##foo##_fmt_type_private)
70
71 struct std_descr {
72 v4l2_std_id std;
73 const char *descr;
74 };
75
76 static const struct std_descr standards[] = {
77 { V4L2_STD_NTSC, "NTSC" },
78 { V4L2_STD_NTSC_M, "NTSC-M" },
79 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
80 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
81 { V4L2_STD_NTSC_443, "NTSC-443" },
82 { V4L2_STD_PAL, "PAL" },
83 { V4L2_STD_PAL_BG, "PAL-BG" },
84 { V4L2_STD_PAL_B, "PAL-B" },
85 { V4L2_STD_PAL_B1, "PAL-B1" },
86 { V4L2_STD_PAL_G, "PAL-G" },
87 { V4L2_STD_PAL_H, "PAL-H" },
88 { V4L2_STD_PAL_I, "PAL-I" },
89 { V4L2_STD_PAL_DK, "PAL-DK" },
90 { V4L2_STD_PAL_D, "PAL-D" },
91 { V4L2_STD_PAL_D1, "PAL-D1" },
92 { V4L2_STD_PAL_K, "PAL-K" },
93 { V4L2_STD_PAL_M, "PAL-M" },
94 { V4L2_STD_PAL_N, "PAL-N" },
95 { V4L2_STD_PAL_Nc, "PAL-Nc" },
96 { V4L2_STD_PAL_60, "PAL-60" },
97 { V4L2_STD_SECAM, "SECAM" },
98 { V4L2_STD_SECAM_B, "SECAM-B" },
99 { V4L2_STD_SECAM_G, "SECAM-G" },
100 { V4L2_STD_SECAM_H, "SECAM-H" },
101 { V4L2_STD_SECAM_DK, "SECAM-DK" },
102 { V4L2_STD_SECAM_D, "SECAM-D" },
103 { V4L2_STD_SECAM_K, "SECAM-K" },
104 { V4L2_STD_SECAM_K1, "SECAM-K1" },
105 { V4L2_STD_SECAM_L, "SECAM-L" },
106 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
107 { 0, "Unknown" }
108 };
109
110 /* video4linux standard ID conversion to standard name
111 */
112 const char *v4l2_norm_to_name(v4l2_std_id id)
113 {
114 u32 myid = id;
115 int i;
116
117 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
118 64 bit comparations. So, on that architecture, with some gcc
119 variants, compilation fails. Currently, the max value is 30bit wide.
120 */
121 BUG_ON(myid != id);
122
123 for (i = 0; standards[i].std; i++)
124 if (myid == standards[i].std)
125 break;
126 return standards[i].descr;
127 }
128 EXPORT_SYMBOL(v4l2_norm_to_name);
129
130 /* Returns frame period for the given standard */
131 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
132 {
133 if (id & V4L2_STD_525_60) {
134 frameperiod->numerator = 1001;
135 frameperiod->denominator = 30000;
136 } else {
137 frameperiod->numerator = 1;
138 frameperiod->denominator = 25;
139 }
140 }
141 EXPORT_SYMBOL(v4l2_video_std_frame_period);
142
143 /* Fill in the fields of a v4l2_standard structure according to the
144 'id' and 'transmission' parameters. Returns negative on error. */
145 int v4l2_video_std_construct(struct v4l2_standard *vs,
146 int id, const char *name)
147 {
148 vs->id = id;
149 v4l2_video_std_frame_period(id, &vs->frameperiod);
150 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
151 strlcpy(vs->name, name, sizeof(vs->name));
152 return 0;
153 }
154 EXPORT_SYMBOL(v4l2_video_std_construct);
155
156 /* ----------------------------------------------------------------- */
157 /* some arrays for pretty-printing debug messages of enum types */
158
159 const char *v4l2_field_names[] = {
160 [V4L2_FIELD_ANY] = "any",
161 [V4L2_FIELD_NONE] = "none",
162 [V4L2_FIELD_TOP] = "top",
163 [V4L2_FIELD_BOTTOM] = "bottom",
164 [V4L2_FIELD_INTERLACED] = "interlaced",
165 [V4L2_FIELD_SEQ_TB] = "seq-tb",
166 [V4L2_FIELD_SEQ_BT] = "seq-bt",
167 [V4L2_FIELD_ALTERNATE] = "alternate",
168 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
169 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
170 };
171 EXPORT_SYMBOL(v4l2_field_names);
172
173 const char *v4l2_type_names[] = {
174 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
175 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
176 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
177 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
178 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
179 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
180 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
181 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
182 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
183 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
184 };
185 EXPORT_SYMBOL(v4l2_type_names);
186
187 static const char *v4l2_memory_names[] = {
188 [V4L2_MEMORY_MMAP] = "mmap",
189 [V4L2_MEMORY_USERPTR] = "userptr",
190 [V4L2_MEMORY_OVERLAY] = "overlay",
191 };
192
193 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
194 arr[a] : "unknown")
195
196 /* ------------------------------------------------------------------ */
197 /* debug help functions */
198 static const char *v4l2_ioctls[] = {
199 [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
200 [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
201 [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
202 [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
203 [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
204 [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
205 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
206 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
207 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
208 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
209 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
210 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
211 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
212 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
213 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
214 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
215 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
216 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
217 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
218 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
219 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
220 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
221 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
222 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
223 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
224 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
225 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
226 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
227 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
228 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
229 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
230 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
231 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
232 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
233 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
234 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
235 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
236 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
237 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
238 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
239 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
240 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
241 [_IOC_NR(VIDIOC_G_SELECTION)] = "VIDIOC_G_SELECTION",
242 [_IOC_NR(VIDIOC_S_SELECTION)] = "VIDIOC_S_SELECTION",
243 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
244 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
245 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
246 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
247 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
248 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
249 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
250 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
251 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
252 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
253 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
254 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
255 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
256 #if 1
257 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
258 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
259 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
260 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
261 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
262
263 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
264 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
265
266 [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
267 [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK",
268 #endif
269 [_IOC_NR(VIDIOC_ENUM_DV_PRESETS)] = "VIDIOC_ENUM_DV_PRESETS",
270 [_IOC_NR(VIDIOC_S_DV_PRESET)] = "VIDIOC_S_DV_PRESET",
271 [_IOC_NR(VIDIOC_G_DV_PRESET)] = "VIDIOC_G_DV_PRESET",
272 [_IOC_NR(VIDIOC_QUERY_DV_PRESET)] = "VIDIOC_QUERY_DV_PRESET",
273 [_IOC_NR(VIDIOC_S_DV_TIMINGS)] = "VIDIOC_S_DV_TIMINGS",
274 [_IOC_NR(VIDIOC_G_DV_TIMINGS)] = "VIDIOC_G_DV_TIMINGS",
275 [_IOC_NR(VIDIOC_DQEVENT)] = "VIDIOC_DQEVENT",
276 [_IOC_NR(VIDIOC_SUBSCRIBE_EVENT)] = "VIDIOC_SUBSCRIBE_EVENT",
277 [_IOC_NR(VIDIOC_UNSUBSCRIBE_EVENT)] = "VIDIOC_UNSUBSCRIBE_EVENT",
278 [_IOC_NR(VIDIOC_CREATE_BUFS)] = "VIDIOC_CREATE_BUFS",
279 [_IOC_NR(VIDIOC_PREPARE_BUF)] = "VIDIOC_PREPARE_BUF",
280 };
281 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
282
283 /* Common ioctl debug function. This function can be used by
284 external ioctl messages as well as internal V4L ioctl */
285 void v4l_printk_ioctl(unsigned int cmd)
286 {
287 char *dir, *type;
288
289 switch (_IOC_TYPE(cmd)) {
290 case 'd':
291 type = "v4l2_int";
292 break;
293 case 'V':
294 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
295 type = "v4l2";
296 break;
297 }
298 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
299 return;
300 default:
301 type = "unknown";
302 }
303
304 switch (_IOC_DIR(cmd)) {
305 case _IOC_NONE: dir = "--"; break;
306 case _IOC_READ: dir = "r-"; break;
307 case _IOC_WRITE: dir = "-w"; break;
308 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
309 default: dir = "*ERR*"; break;
310 }
311 printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
312 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
313 }
314 EXPORT_SYMBOL(v4l_printk_ioctl);
315
316 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
317 struct v4l2_buffer *p)
318 {
319 struct v4l2_timecode *tc = &p->timecode;
320 struct v4l2_plane *plane;
321 int i;
322
323 dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
324 "flags=0x%08d, field=%0d, sequence=%d, memory=%s\n",
325 p->timestamp.tv_sec / 3600,
326 (int)(p->timestamp.tv_sec / 60) % 60,
327 (int)(p->timestamp.tv_sec % 60),
328 (long)p->timestamp.tv_usec,
329 p->index,
330 prt_names(p->type, v4l2_type_names),
331 p->flags, p->field, p->sequence,
332 prt_names(p->memory, v4l2_memory_names));
333
334 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
335 for (i = 0; i < p->length; ++i) {
336 plane = &p->m.planes[i];
337 dbgarg2("plane %d: bytesused=%d, data_offset=0x%08x "
338 "offset/userptr=0x%08lx, length=%d\n",
339 i, plane->bytesused, plane->data_offset,
340 plane->m.userptr, plane->length);
341 }
342 } else {
343 dbgarg2("bytesused=%d, offset/userptr=0x%08lx, length=%d\n",
344 p->bytesused, p->m.userptr, p->length);
345 }
346
347 dbgarg2("timecode=%02d:%02d:%02d type=%d, "
348 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
349 tc->hours, tc->minutes, tc->seconds,
350 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
351 }
352
353 static inline void dbgrect(struct video_device *vfd, char *s,
354 struct v4l2_rect *r)
355 {
356 dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
357 r->width, r->height);
358 };
359
360 static inline void v4l_print_pix_fmt(struct video_device *vfd,
361 struct v4l2_pix_format *fmt)
362 {
363 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
364 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
365 fmt->width, fmt->height,
366 (fmt->pixelformat & 0xff),
367 (fmt->pixelformat >> 8) & 0xff,
368 (fmt->pixelformat >> 16) & 0xff,
369 (fmt->pixelformat >> 24) & 0xff,
370 prt_names(fmt->field, v4l2_field_names),
371 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
372 };
373
374 static inline void v4l_print_pix_fmt_mplane(struct video_device *vfd,
375 struct v4l2_pix_format_mplane *fmt)
376 {
377 int i;
378
379 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
380 "colorspace=%d, num_planes=%d\n",
381 fmt->width, fmt->height,
382 (fmt->pixelformat & 0xff),
383 (fmt->pixelformat >> 8) & 0xff,
384 (fmt->pixelformat >> 16) & 0xff,
385 (fmt->pixelformat >> 24) & 0xff,
386 prt_names(fmt->field, v4l2_field_names),
387 fmt->colorspace, fmt->num_planes);
388
389 for (i = 0; i < fmt->num_planes; ++i)
390 dbgarg2("plane %d: bytesperline=%d sizeimage=%d\n", i,
391 fmt->plane_fmt[i].bytesperline,
392 fmt->plane_fmt[i].sizeimage);
393 }
394
395 static inline void v4l_print_ext_ctrls(unsigned int cmd,
396 struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
397 {
398 __u32 i;
399
400 if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
401 return;
402 dbgarg(cmd, "");
403 printk(KERN_CONT "class=0x%x", c->ctrl_class);
404 for (i = 0; i < c->count; i++) {
405 if (show_vals && !c->controls[i].size)
406 printk(KERN_CONT " id/val=0x%x/0x%x",
407 c->controls[i].id, c->controls[i].value);
408 else
409 printk(KERN_CONT " id=0x%x,size=%u",
410 c->controls[i].id, c->controls[i].size);
411 }
412 printk(KERN_CONT "\n");
413 };
414
415 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
416 {
417 __u32 i;
418
419 /* zero the reserved fields */
420 c->reserved[0] = c->reserved[1] = 0;
421 for (i = 0; i < c->count; i++)
422 c->controls[i].reserved2[0] = 0;
423
424 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
425 when using extended controls.
426 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
427 is it allowed for backwards compatibility.
428 */
429 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
430 return 0;
431 /* Check that all controls are from the same control class. */
432 for (i = 0; i < c->count; i++) {
433 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
434 c->error_idx = i;
435 return 0;
436 }
437 }
438 return 1;
439 }
440
441 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
442 {
443 if (ops == NULL)
444 return -EINVAL;
445
446 switch (type) {
447 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
448 if (ops->vidioc_g_fmt_vid_cap ||
449 ops->vidioc_g_fmt_vid_cap_mplane)
450 return 0;
451 break;
452 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
453 if (ops->vidioc_g_fmt_vid_cap_mplane)
454 return 0;
455 break;
456 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
457 if (ops->vidioc_g_fmt_vid_overlay)
458 return 0;
459 break;
460 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
461 if (ops->vidioc_g_fmt_vid_out ||
462 ops->vidioc_g_fmt_vid_out_mplane)
463 return 0;
464 break;
465 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
466 if (ops->vidioc_g_fmt_vid_out_mplane)
467 return 0;
468 break;
469 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
470 if (ops->vidioc_g_fmt_vid_out_overlay)
471 return 0;
472 break;
473 case V4L2_BUF_TYPE_VBI_CAPTURE:
474 if (ops->vidioc_g_fmt_vbi_cap)
475 return 0;
476 break;
477 case V4L2_BUF_TYPE_VBI_OUTPUT:
478 if (ops->vidioc_g_fmt_vbi_out)
479 return 0;
480 break;
481 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
482 if (ops->vidioc_g_fmt_sliced_vbi_cap)
483 return 0;
484 break;
485 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
486 if (ops->vidioc_g_fmt_sliced_vbi_out)
487 return 0;
488 break;
489 case V4L2_BUF_TYPE_PRIVATE:
490 if (ops->vidioc_g_fmt_type_private)
491 return 0;
492 break;
493 }
494 return -EINVAL;
495 }
496
497 static long __video_do_ioctl(struct file *file,
498 unsigned int cmd, void *arg)
499 {
500 struct video_device *vfd = video_devdata(file);
501 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
502 void *fh = file->private_data;
503 struct v4l2_fh *vfh = NULL;
504 int use_fh_prio = 0;
505 long ret_prio = 0;
506 long ret = -ENOTTY;
507
508 if (ops == NULL) {
509 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
510 vfd->name);
511 return ret;
512 }
513
514 if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
515 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
516 v4l_print_ioctl(vfd->name, cmd);
517 printk(KERN_CONT "\n");
518 }
519
520 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
521 vfh = file->private_data;
522 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
523 }
524
525 if (use_fh_prio)
526 ret_prio = v4l2_prio_check(vfd->prio, vfh->prio);
527
528 switch (cmd) {
529
530 /* --- capabilities ------------------------------------------ */
531 case VIDIOC_QUERYCAP:
532 {
533 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
534
535 if (!ops->vidioc_querycap)
536 break;
537
538 cap->version = LINUX_VERSION_CODE;
539 ret = ops->vidioc_querycap(file, fh, cap);
540 if (!ret)
541 dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
542 "version=0x%08x, "
543 "capabilities=0x%08x\n",
544 cap->driver, cap->card, cap->bus_info,
545 cap->version,
546 cap->capabilities);
547 break;
548 }
549
550 /* --- priority ------------------------------------------ */
551 case VIDIOC_G_PRIORITY:
552 {
553 enum v4l2_priority *p = arg;
554
555 if (ops->vidioc_g_priority) {
556 ret = ops->vidioc_g_priority(file, fh, p);
557 } else if (use_fh_prio) {
558 *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
559 ret = 0;
560 }
561 if (!ret)
562 dbgarg(cmd, "priority is %d\n", *p);
563 break;
564 }
565 case VIDIOC_S_PRIORITY:
566 {
567 enum v4l2_priority *p = arg;
568
569 if (!ops->vidioc_s_priority && !use_fh_prio)
570 break;
571 dbgarg(cmd, "setting priority to %d\n", *p);
572 if (ops->vidioc_s_priority)
573 ret = ops->vidioc_s_priority(file, fh, *p);
574 else
575 ret = ret_prio ? ret_prio :
576 v4l2_prio_change(&vfd->v4l2_dev->prio,
577 &vfh->prio, *p);
578 break;
579 }
580
581 /* --- capture ioctls ---------------------------------------- */
582 case VIDIOC_ENUM_FMT:
583 {
584 struct v4l2_fmtdesc *f = arg;
585
586 switch (f->type) {
587 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
588 if (likely(ops->vidioc_enum_fmt_vid_cap))
589 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
590 break;
591 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
592 if (likely(ops->vidioc_enum_fmt_vid_cap_mplane))
593 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file,
594 fh, f);
595 break;
596 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
597 if (likely(ops->vidioc_enum_fmt_vid_overlay))
598 ret = ops->vidioc_enum_fmt_vid_overlay(file,
599 fh, f);
600 break;
601 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
602 if (likely(ops->vidioc_enum_fmt_vid_out))
603 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
604 break;
605 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
606 if (likely(ops->vidioc_enum_fmt_vid_out_mplane))
607 ret = ops->vidioc_enum_fmt_vid_out_mplane(file,
608 fh, f);
609 break;
610 case V4L2_BUF_TYPE_PRIVATE:
611 if (likely(ops->vidioc_enum_fmt_type_private))
612 ret = ops->vidioc_enum_fmt_type_private(file,
613 fh, f);
614 break;
615 default:
616 break;
617 }
618 if (likely (!ret))
619 dbgarg(cmd, "index=%d, type=%d, flags=%d, "
620 "pixelformat=%c%c%c%c, description='%s'\n",
621 f->index, f->type, f->flags,
622 (f->pixelformat & 0xff),
623 (f->pixelformat >> 8) & 0xff,
624 (f->pixelformat >> 16) & 0xff,
625 (f->pixelformat >> 24) & 0xff,
626 f->description);
627 else if (ret == -ENOTTY &&
628 (ops->vidioc_enum_fmt_vid_cap ||
629 ops->vidioc_enum_fmt_vid_out ||
630 ops->vidioc_enum_fmt_vid_cap_mplane ||
631 ops->vidioc_enum_fmt_vid_out_mplane ||
632 ops->vidioc_enum_fmt_vid_overlay ||
633 ops->vidioc_enum_fmt_type_private))
634 ret = -EINVAL;
635 break;
636 }
637 case VIDIOC_G_FMT:
638 {
639 struct v4l2_format *f = (struct v4l2_format *)arg;
640
641 /* FIXME: Should be one dump per type */
642 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
643
644 switch (f->type) {
645 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
646 if (ops->vidioc_g_fmt_vid_cap)
647 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
648 if (!ret)
649 v4l_print_pix_fmt(vfd, &f->fmt.pix);
650 break;
651 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
652 if (ops->vidioc_g_fmt_vid_cap_mplane)
653 ret = ops->vidioc_g_fmt_vid_cap_mplane(file,
654 fh, f);
655 if (!ret)
656 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
657 break;
658 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
659 if (likely(ops->vidioc_g_fmt_vid_overlay))
660 ret = ops->vidioc_g_fmt_vid_overlay(file,
661 fh, f);
662 break;
663 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
664 if (ops->vidioc_g_fmt_vid_out)
665 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
666 if (!ret)
667 v4l_print_pix_fmt(vfd, &f->fmt.pix);
668 break;
669 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
670 if (ops->vidioc_g_fmt_vid_out_mplane)
671 ret = ops->vidioc_g_fmt_vid_out_mplane(file,
672 fh, f);
673 if (!ret)
674 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
675 break;
676 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
677 if (likely(ops->vidioc_g_fmt_vid_out_overlay))
678 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
679 fh, f);
680 break;
681 case V4L2_BUF_TYPE_VBI_CAPTURE:
682 if (likely(ops->vidioc_g_fmt_vbi_cap))
683 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
684 break;
685 case V4L2_BUF_TYPE_VBI_OUTPUT:
686 if (likely(ops->vidioc_g_fmt_vbi_out))
687 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
688 break;
689 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
690 if (likely(ops->vidioc_g_fmt_sliced_vbi_cap))
691 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
692 fh, f);
693 break;
694 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
695 if (likely(ops->vidioc_g_fmt_sliced_vbi_out))
696 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
697 fh, f);
698 break;
699 case V4L2_BUF_TYPE_PRIVATE:
700 if (likely(ops->vidioc_g_fmt_type_private))
701 ret = ops->vidioc_g_fmt_type_private(file,
702 fh, f);
703 break;
704 }
705 if (unlikely(ret == -ENOTTY && have_fmt_ops(g)))
706 ret = -EINVAL;
707
708 break;
709 }
710 case VIDIOC_S_FMT:
711 {
712 struct v4l2_format *f = (struct v4l2_format *)arg;
713
714 if (!have_fmt_ops(s))
715 break;
716 if (ret_prio) {
717 ret = ret_prio;
718 break;
719 }
720 ret = -EINVAL;
721
722 /* FIXME: Should be one dump per type */
723 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
724
725 switch (f->type) {
726 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
727 CLEAR_AFTER_FIELD(f, fmt.pix);
728 v4l_print_pix_fmt(vfd, &f->fmt.pix);
729 if (ops->vidioc_s_fmt_vid_cap)
730 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
731 break;
732 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
733 CLEAR_AFTER_FIELD(f, fmt.pix_mp);
734 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
735 if (ops->vidioc_s_fmt_vid_cap_mplane)
736 ret = ops->vidioc_s_fmt_vid_cap_mplane(file,
737 fh, f);
738 break;
739 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
740 CLEAR_AFTER_FIELD(f, fmt.win);
741 if (ops->vidioc_s_fmt_vid_overlay)
742 ret = ops->vidioc_s_fmt_vid_overlay(file,
743 fh, f);
744 break;
745 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
746 CLEAR_AFTER_FIELD(f, fmt.pix);
747 v4l_print_pix_fmt(vfd, &f->fmt.pix);
748 if (ops->vidioc_s_fmt_vid_out)
749 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
750 break;
751 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
752 CLEAR_AFTER_FIELD(f, fmt.pix_mp);
753 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
754 if (ops->vidioc_s_fmt_vid_out_mplane)
755 ret = ops->vidioc_s_fmt_vid_out_mplane(file,
756 fh, f);
757 break;
758 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
759 CLEAR_AFTER_FIELD(f, fmt.win);
760 if (ops->vidioc_s_fmt_vid_out_overlay)
761 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
762 fh, f);
763 break;
764 case V4L2_BUF_TYPE_VBI_CAPTURE:
765 CLEAR_AFTER_FIELD(f, fmt.vbi);
766 if (likely(ops->vidioc_s_fmt_vbi_cap))
767 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
768 break;
769 case V4L2_BUF_TYPE_VBI_OUTPUT:
770 CLEAR_AFTER_FIELD(f, fmt.vbi);
771 if (likely(ops->vidioc_s_fmt_vbi_out))
772 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
773 break;
774 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
775 CLEAR_AFTER_FIELD(f, fmt.sliced);
776 if (likely(ops->vidioc_s_fmt_sliced_vbi_cap))
777 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
778 fh, f);
779 break;
780 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
781 CLEAR_AFTER_FIELD(f, fmt.sliced);
782 if (likely(ops->vidioc_s_fmt_sliced_vbi_out))
783 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
784 fh, f);
785
786 break;
787 case V4L2_BUF_TYPE_PRIVATE:
788 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
789 if (likely(ops->vidioc_s_fmt_type_private))
790 ret = ops->vidioc_s_fmt_type_private(file,
791 fh, f);
792 break;
793 }
794 break;
795 }
796 case VIDIOC_TRY_FMT:
797 {
798 struct v4l2_format *f = (struct v4l2_format *)arg;
799
800 /* FIXME: Should be one dump per type */
801 dbgarg(cmd, "type=%s\n", prt_names(f->type,
802 v4l2_type_names));
803 switch (f->type) {
804 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
805 CLEAR_AFTER_FIELD(f, fmt.pix);
806 if (ops->vidioc_try_fmt_vid_cap)
807 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
808 if (!ret)
809 v4l_print_pix_fmt(vfd, &f->fmt.pix);
810 break;
811 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
812 CLEAR_AFTER_FIELD(f, fmt.pix_mp);
813 if (ops->vidioc_try_fmt_vid_cap_mplane)
814 ret = ops->vidioc_try_fmt_vid_cap_mplane(file,
815 fh, f);
816 if (!ret)
817 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
818 break;
819 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
820 CLEAR_AFTER_FIELD(f, fmt.win);
821 if (likely(ops->vidioc_try_fmt_vid_overlay))
822 ret = ops->vidioc_try_fmt_vid_overlay(file,
823 fh, f);
824 break;
825 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
826 CLEAR_AFTER_FIELD(f, fmt.pix);
827 if (ops->vidioc_try_fmt_vid_out)
828 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
829 if (!ret)
830 v4l_print_pix_fmt(vfd, &f->fmt.pix);
831 break;
832 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
833 CLEAR_AFTER_FIELD(f, fmt.pix_mp);
834 if (ops->vidioc_try_fmt_vid_out_mplane)
835 ret = ops->vidioc_try_fmt_vid_out_mplane(file,
836 fh, f);
837 if (!ret)
838 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
839 break;
840 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
841 CLEAR_AFTER_FIELD(f, fmt.win);
842 if (likely(ops->vidioc_try_fmt_vid_out_overlay))
843 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
844 fh, f);
845 break;
846 case V4L2_BUF_TYPE_VBI_CAPTURE:
847 CLEAR_AFTER_FIELD(f, fmt.vbi);
848 if (likely(ops->vidioc_try_fmt_vbi_cap))
849 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
850 break;
851 case V4L2_BUF_TYPE_VBI_OUTPUT:
852 CLEAR_AFTER_FIELD(f, fmt.vbi);
853 if (likely(ops->vidioc_try_fmt_vbi_out))
854 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
855 break;
856 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
857 CLEAR_AFTER_FIELD(f, fmt.sliced);
858 if (likely(ops->vidioc_try_fmt_sliced_vbi_cap))
859 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
860 fh, f);
861 break;
862 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
863 CLEAR_AFTER_FIELD(f, fmt.sliced);
864 if (likely(ops->vidioc_try_fmt_sliced_vbi_out))
865 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
866 fh, f);
867 break;
868 case V4L2_BUF_TYPE_PRIVATE:
869 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
870 if (likely(ops->vidioc_try_fmt_type_private))
871 ret = ops->vidioc_try_fmt_type_private(file,
872 fh, f);
873 break;
874 }
875 if (unlikely(ret == -ENOTTY && have_fmt_ops(try)))
876 ret = -EINVAL;
877 break;
878 }
879 /* FIXME: Those buf reqs could be handled here,
880 with some changes on videobuf to allow its header to be included at
881 videodev2.h or being merged at videodev2.
882 */
883 case VIDIOC_REQBUFS:
884 {
885 struct v4l2_requestbuffers *p = arg;
886
887 if (!ops->vidioc_reqbufs)
888 break;
889 if (ret_prio) {
890 ret = ret_prio;
891 break;
892 }
893 ret = check_fmt(ops, p->type);
894 if (ret)
895 break;
896
897 if (p->type < V4L2_BUF_TYPE_PRIVATE)
898 CLEAR_AFTER_FIELD(p, memory);
899
900 ret = ops->vidioc_reqbufs(file, fh, p);
901 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
902 p->count,
903 prt_names(p->type, v4l2_type_names),
904 prt_names(p->memory, v4l2_memory_names));
905 break;
906 }
907 case VIDIOC_QUERYBUF:
908 {
909 struct v4l2_buffer *p = arg;
910
911 if (!ops->vidioc_querybuf)
912 break;
913 ret = check_fmt(ops, p->type);
914 if (ret)
915 break;
916
917 ret = ops->vidioc_querybuf(file, fh, p);
918 if (!ret)
919 dbgbuf(cmd, vfd, p);
920 break;
921 }
922 case VIDIOC_QBUF:
923 {
924 struct v4l2_buffer *p = arg;
925
926 if (!ops->vidioc_qbuf)
927 break;
928 ret = check_fmt(ops, p->type);
929 if (ret)
930 break;
931
932 ret = ops->vidioc_qbuf(file, fh, p);
933 if (!ret)
934 dbgbuf(cmd, vfd, p);
935 break;
936 }
937 case VIDIOC_DQBUF:
938 {
939 struct v4l2_buffer *p = arg;
940
941 if (!ops->vidioc_dqbuf)
942 break;
943 ret = check_fmt(ops, p->type);
944 if (ret)
945 break;
946
947 ret = ops->vidioc_dqbuf(file, fh, p);
948 if (!ret)
949 dbgbuf(cmd, vfd, p);
950 break;
951 }
952 case VIDIOC_OVERLAY:
953 {
954 int *i = arg;
955
956 if (!ops->vidioc_overlay)
957 break;
958 if (ret_prio) {
959 ret = ret_prio;
960 break;
961 }
962 dbgarg(cmd, "value=%d\n", *i);
963 ret = ops->vidioc_overlay(file, fh, *i);
964 break;
965 }
966 case VIDIOC_G_FBUF:
967 {
968 struct v4l2_framebuffer *p = arg;
969
970 if (!ops->vidioc_g_fbuf)
971 break;
972 ret = ops->vidioc_g_fbuf(file, fh, arg);
973 if (!ret) {
974 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
975 p->capability, p->flags,
976 (unsigned long)p->base);
977 v4l_print_pix_fmt(vfd, &p->fmt);
978 }
979 break;
980 }
981 case VIDIOC_S_FBUF:
982 {
983 struct v4l2_framebuffer *p = arg;
984
985 if (!ops->vidioc_s_fbuf)
986 break;
987 if (ret_prio) {
988 ret = ret_prio;
989 break;
990 }
991 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
992 p->capability, p->flags, (unsigned long)p->base);
993 v4l_print_pix_fmt(vfd, &p->fmt);
994 ret = ops->vidioc_s_fbuf(file, fh, arg);
995 break;
996 }
997 case VIDIOC_STREAMON:
998 {
999 enum v4l2_buf_type i = *(int *)arg;
1000
1001 if (!ops->vidioc_streamon)
1002 break;
1003 if (ret_prio) {
1004 ret = ret_prio;
1005 break;
1006 }
1007 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1008 ret = ops->vidioc_streamon(file, fh, i);
1009 break;
1010 }
1011 case VIDIOC_STREAMOFF:
1012 {
1013 enum v4l2_buf_type i = *(int *)arg;
1014
1015 if (!ops->vidioc_streamoff)
1016 break;
1017 if (ret_prio) {
1018 ret = ret_prio;
1019 break;
1020 }
1021 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1022 ret = ops->vidioc_streamoff(file, fh, i);
1023 break;
1024 }
1025 /* ---------- tv norms ---------- */
1026 case VIDIOC_ENUMSTD:
1027 {
1028 struct v4l2_standard *p = arg;
1029 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1030 unsigned int index = p->index, i, j = 0;
1031 const char *descr = "";
1032
1033 if (id == 0)
1034 break;
1035 ret = -EINVAL;
1036
1037 /* Return norm array in a canonical way */
1038 for (i = 0; i <= index && id; i++) {
1039 /* last std value in the standards array is 0, so this
1040 while always ends there since (id & 0) == 0. */
1041 while ((id & standards[j].std) != standards[j].std)
1042 j++;
1043 curr_id = standards[j].std;
1044 descr = standards[j].descr;
1045 j++;
1046 if (curr_id == 0)
1047 break;
1048 if (curr_id != V4L2_STD_PAL &&
1049 curr_id != V4L2_STD_SECAM &&
1050 curr_id != V4L2_STD_NTSC)
1051 id &= ~curr_id;
1052 }
1053 if (i <= index)
1054 break;
1055
1056 v4l2_video_std_construct(p, curr_id, descr);
1057
1058 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1059 "framelines=%d\n", p->index,
1060 (unsigned long long)p->id, p->name,
1061 p->frameperiod.numerator,
1062 p->frameperiod.denominator,
1063 p->framelines);
1064
1065 ret = 0;
1066 break;
1067 }
1068 case VIDIOC_G_STD:
1069 {
1070 v4l2_std_id *id = arg;
1071
1072 /* Calls the specific handler */
1073 if (ops->vidioc_g_std)
1074 ret = ops->vidioc_g_std(file, fh, id);
1075 else if (vfd->current_norm) {
1076 ret = 0;
1077 *id = vfd->current_norm;
1078 }
1079
1080 if (likely(!ret))
1081 dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1082 break;
1083 }
1084 case VIDIOC_S_STD:
1085 {
1086 v4l2_std_id *id = arg, norm;
1087
1088 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1089
1090 if (!ops->vidioc_s_std)
1091 break;
1092
1093 if (ret_prio) {
1094 ret = ret_prio;
1095 break;
1096 }
1097 ret = -EINVAL;
1098 norm = (*id) & vfd->tvnorms;
1099 if (vfd->tvnorms && !norm) /* Check if std is supported */
1100 break;
1101
1102 /* Calls the specific handler */
1103 ret = ops->vidioc_s_std(file, fh, &norm);
1104
1105 /* Updates standard information */
1106 if (ret >= 0)
1107 vfd->current_norm = norm;
1108 break;
1109 }
1110 case VIDIOC_QUERYSTD:
1111 {
1112 v4l2_std_id *p = arg;
1113
1114 if (!ops->vidioc_querystd)
1115 break;
1116 /*
1117 * If nothing detected, it should return all supported
1118 * Drivers just need to mask the std argument, in order
1119 * to remove the standards that don't apply from the mask.
1120 * This means that tuners, audio and video decoders can join
1121 * their efforts to improve the standards detection
1122 */
1123 *p = vfd->tvnorms;
1124 ret = ops->vidioc_querystd(file, fh, arg);
1125 if (!ret)
1126 dbgarg(cmd, "detected std=%08Lx\n",
1127 (unsigned long long)*p);
1128 break;
1129 }
1130 /* ------ input switching ---------- */
1131 /* FIXME: Inputs can be handled inside videodev2 */
1132 case VIDIOC_ENUMINPUT:
1133 {
1134 struct v4l2_input *p = arg;
1135
1136 /*
1137 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1138 * CAP_STD here based on ioctl handler provided by the
1139 * driver. If the driver doesn't support these
1140 * for a specific input, it must override these flags.
1141 */
1142 if (ops->vidioc_s_std)
1143 p->capabilities |= V4L2_IN_CAP_STD;
1144 if (ops->vidioc_s_dv_preset)
1145 p->capabilities |= V4L2_IN_CAP_PRESETS;
1146 if (ops->vidioc_s_dv_timings)
1147 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1148
1149 if (!ops->vidioc_enum_input)
1150 break;
1151
1152 ret = ops->vidioc_enum_input(file, fh, p);
1153 if (!ret)
1154 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1155 "audioset=%d, "
1156 "tuner=%d, std=%08Lx, status=%d\n",
1157 p->index, p->name, p->type, p->audioset,
1158 p->tuner,
1159 (unsigned long long)p->std,
1160 p->status);
1161 break;
1162 }
1163 case VIDIOC_G_INPUT:
1164 {
1165 unsigned int *i = arg;
1166
1167 if (!ops->vidioc_g_input)
1168 break;
1169 ret = ops->vidioc_g_input(file, fh, i);
1170 if (!ret)
1171 dbgarg(cmd, "value=%d\n", *i);
1172 break;
1173 }
1174 case VIDIOC_S_INPUT:
1175 {
1176 unsigned int *i = arg;
1177
1178 if (!ops->vidioc_s_input)
1179 break;
1180 if (ret_prio) {
1181 ret = ret_prio;
1182 break;
1183 }
1184 dbgarg(cmd, "value=%d\n", *i);
1185 ret = ops->vidioc_s_input(file, fh, *i);
1186 break;
1187 }
1188
1189 /* ------ output switching ---------- */
1190 case VIDIOC_ENUMOUTPUT:
1191 {
1192 struct v4l2_output *p = arg;
1193
1194 if (!ops->vidioc_enum_output)
1195 break;
1196
1197 /*
1198 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1199 * CAP_STD here based on ioctl handler provided by the
1200 * driver. If the driver doesn't support these
1201 * for a specific output, it must override these flags.
1202 */
1203 if (ops->vidioc_s_std)
1204 p->capabilities |= V4L2_OUT_CAP_STD;
1205 if (ops->vidioc_s_dv_preset)
1206 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1207 if (ops->vidioc_s_dv_timings)
1208 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1209
1210 ret = ops->vidioc_enum_output(file, fh, p);
1211 if (!ret)
1212 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1213 "audioset=0x%x, "
1214 "modulator=%d, std=0x%08Lx\n",
1215 p->index, p->name, p->type, p->audioset,
1216 p->modulator, (unsigned long long)p->std);
1217 break;
1218 }
1219 case VIDIOC_G_OUTPUT:
1220 {
1221 unsigned int *i = arg;
1222
1223 if (!ops->vidioc_g_output)
1224 break;
1225 ret = ops->vidioc_g_output(file, fh, i);
1226 if (!ret)
1227 dbgarg(cmd, "value=%d\n", *i);
1228 break;
1229 }
1230 case VIDIOC_S_OUTPUT:
1231 {
1232 unsigned int *i = arg;
1233
1234 if (!ops->vidioc_s_output)
1235 break;
1236 if (ret_prio) {
1237 ret = ret_prio;
1238 break;
1239 }
1240 dbgarg(cmd, "value=%d\n", *i);
1241 ret = ops->vidioc_s_output(file, fh, *i);
1242 break;
1243 }
1244
1245 /* --- controls ---------------------------------------------- */
1246 case VIDIOC_QUERYCTRL:
1247 {
1248 struct v4l2_queryctrl *p = arg;
1249
1250 if (vfh && vfh->ctrl_handler)
1251 ret = v4l2_queryctrl(vfh->ctrl_handler, p);
1252 else if (vfd->ctrl_handler)
1253 ret = v4l2_queryctrl(vfd->ctrl_handler, p);
1254 else if (ops->vidioc_queryctrl)
1255 ret = ops->vidioc_queryctrl(file, fh, p);
1256 else
1257 break;
1258 if (!ret)
1259 dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1260 "step=%d, default=%d, flags=0x%08x\n",
1261 p->id, p->type, p->name,
1262 p->minimum, p->maximum,
1263 p->step, p->default_value, p->flags);
1264 else
1265 dbgarg(cmd, "id=0x%x\n", p->id);
1266 break;
1267 }
1268 case VIDIOC_G_CTRL:
1269 {
1270 struct v4l2_control *p = arg;
1271
1272 if (vfh && vfh->ctrl_handler)
1273 ret = v4l2_g_ctrl(vfh->ctrl_handler, p);
1274 else if (vfd->ctrl_handler)
1275 ret = v4l2_g_ctrl(vfd->ctrl_handler, p);
1276 else if (ops->vidioc_g_ctrl)
1277 ret = ops->vidioc_g_ctrl(file, fh, p);
1278 else if (ops->vidioc_g_ext_ctrls) {
1279 struct v4l2_ext_controls ctrls;
1280 struct v4l2_ext_control ctrl;
1281
1282 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1283 ctrls.count = 1;
1284 ctrls.controls = &ctrl;
1285 ctrl.id = p->id;
1286 ctrl.value = p->value;
1287 if (check_ext_ctrls(&ctrls, 1)) {
1288 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1289 if (ret == 0)
1290 p->value = ctrl.value;
1291 }
1292 } else
1293 break;
1294 if (!ret)
1295 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1296 else
1297 dbgarg(cmd, "id=0x%x\n", p->id);
1298 break;
1299 }
1300 case VIDIOC_S_CTRL:
1301 {
1302 struct v4l2_control *p = arg;
1303 struct v4l2_ext_controls ctrls;
1304 struct v4l2_ext_control ctrl;
1305
1306 if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
1307 !ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1308 break;
1309 if (ret_prio) {
1310 ret = ret_prio;
1311 break;
1312 }
1313
1314 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1315
1316 if (vfh && vfh->ctrl_handler) {
1317 ret = v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1318 break;
1319 }
1320 if (vfd->ctrl_handler) {
1321 ret = v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1322 break;
1323 }
1324 if (ops->vidioc_s_ctrl) {
1325 ret = ops->vidioc_s_ctrl(file, fh, p);
1326 break;
1327 }
1328 if (!ops->vidioc_s_ext_ctrls)
1329 break;
1330
1331 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1332 ctrls.count = 1;
1333 ctrls.controls = &ctrl;
1334 ctrl.id = p->id;
1335 ctrl.value = p->value;
1336 if (check_ext_ctrls(&ctrls, 1))
1337 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1338 else
1339 ret = -EINVAL;
1340 break;
1341 }
1342 case VIDIOC_G_EXT_CTRLS:
1343 {
1344 struct v4l2_ext_controls *p = arg;
1345
1346 p->error_idx = p->count;
1347 if (vfh && vfh->ctrl_handler)
1348 ret = v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1349 else if (vfd->ctrl_handler)
1350 ret = v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1351 else if (ops->vidioc_g_ext_ctrls)
1352 ret = check_ext_ctrls(p, 0) ?
1353 ops->vidioc_g_ext_ctrls(file, fh, p) :
1354 -EINVAL;
1355 else
1356 break;
1357 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1358 break;
1359 }
1360 case VIDIOC_S_EXT_CTRLS:
1361 {
1362 struct v4l2_ext_controls *p = arg;
1363
1364 p->error_idx = p->count;
1365 if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
1366 !ops->vidioc_s_ext_ctrls)
1367 break;
1368 if (ret_prio) {
1369 ret = ret_prio;
1370 break;
1371 }
1372 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1373 if (vfh && vfh->ctrl_handler)
1374 ret = v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1375 else if (vfd->ctrl_handler)
1376 ret = v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1377 else if (check_ext_ctrls(p, 0))
1378 ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1379 else
1380 ret = -EINVAL;
1381 break;
1382 }
1383 case VIDIOC_TRY_EXT_CTRLS:
1384 {
1385 struct v4l2_ext_controls *p = arg;
1386
1387 p->error_idx = p->count;
1388 if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
1389 !ops->vidioc_try_ext_ctrls)
1390 break;
1391 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1392 if (vfh && vfh->ctrl_handler)
1393 ret = v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1394 else if (vfd->ctrl_handler)
1395 ret = v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1396 else if (check_ext_ctrls(p, 0))
1397 ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1398 else
1399 ret = -EINVAL;
1400 break;
1401 }
1402 case VIDIOC_QUERYMENU:
1403 {
1404 struct v4l2_querymenu *p = arg;
1405
1406 if (vfh && vfh->ctrl_handler)
1407 ret = v4l2_querymenu(vfh->ctrl_handler, p);
1408 else if (vfd->ctrl_handler)
1409 ret = v4l2_querymenu(vfd->ctrl_handler, p);
1410 else if (ops->vidioc_querymenu)
1411 ret = ops->vidioc_querymenu(file, fh, p);
1412 else
1413 break;
1414 if (!ret)
1415 dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1416 p->id, p->index, p->name);
1417 else
1418 dbgarg(cmd, "id=0x%x, index=%d\n",
1419 p->id, p->index);
1420 break;
1421 }
1422 /* --- audio ---------------------------------------------- */
1423 case VIDIOC_ENUMAUDIO:
1424 {
1425 struct v4l2_audio *p = arg;
1426
1427 if (!ops->vidioc_enumaudio)
1428 break;
1429 ret = ops->vidioc_enumaudio(file, fh, p);
1430 if (!ret)
1431 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1432 "mode=0x%x\n", p->index, p->name,
1433 p->capability, p->mode);
1434 else
1435 dbgarg(cmd, "index=%d\n", p->index);
1436 break;
1437 }
1438 case VIDIOC_G_AUDIO:
1439 {
1440 struct v4l2_audio *p = arg;
1441
1442 if (!ops->vidioc_g_audio)
1443 break;
1444
1445 ret = ops->vidioc_g_audio(file, fh, p);
1446 if (!ret)
1447 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1448 "mode=0x%x\n", p->index,
1449 p->name, p->capability, p->mode);
1450 else
1451 dbgarg(cmd, "index=%d\n", p->index);
1452 break;
1453 }
1454 case VIDIOC_S_AUDIO:
1455 {
1456 struct v4l2_audio *p = arg;
1457
1458 if (!ops->vidioc_s_audio)
1459 break;
1460 if (ret_prio) {
1461 ret = ret_prio;
1462 break;
1463 }
1464 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1465 "mode=0x%x\n", p->index, p->name,
1466 p->capability, p->mode);
1467 ret = ops->vidioc_s_audio(file, fh, p);
1468 break;
1469 }
1470 case VIDIOC_ENUMAUDOUT:
1471 {
1472 struct v4l2_audioout *p = arg;
1473
1474 if (!ops->vidioc_enumaudout)
1475 break;
1476 dbgarg(cmd, "Enum for index=%d\n", p->index);
1477 ret = ops->vidioc_enumaudout(file, fh, p);
1478 if (!ret)
1479 dbgarg2("index=%d, name=%s, capability=%d, "
1480 "mode=%d\n", p->index, p->name,
1481 p->capability, p->mode);
1482 break;
1483 }
1484 case VIDIOC_G_AUDOUT:
1485 {
1486 struct v4l2_audioout *p = arg;
1487
1488 if (!ops->vidioc_g_audout)
1489 break;
1490
1491 ret = ops->vidioc_g_audout(file, fh, p);
1492 if (!ret)
1493 dbgarg2("index=%d, name=%s, capability=%d, "
1494 "mode=%d\n", p->index, p->name,
1495 p->capability, p->mode);
1496 break;
1497 }
1498 case VIDIOC_S_AUDOUT:
1499 {
1500 struct v4l2_audioout *p = arg;
1501
1502 if (!ops->vidioc_s_audout)
1503 break;
1504 if (ret_prio) {
1505 ret = ret_prio;
1506 break;
1507 }
1508 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1509 "mode=%d\n", p->index, p->name,
1510 p->capability, p->mode);
1511
1512 ret = ops->vidioc_s_audout(file, fh, p);
1513 break;
1514 }
1515 case VIDIOC_G_MODULATOR:
1516 {
1517 struct v4l2_modulator *p = arg;
1518
1519 if (!ops->vidioc_g_modulator)
1520 break;
1521 ret = ops->vidioc_g_modulator(file, fh, p);
1522 if (!ret)
1523 dbgarg(cmd, "index=%d, name=%s, "
1524 "capability=%d, rangelow=%d,"
1525 " rangehigh=%d, txsubchans=%d\n",
1526 p->index, p->name, p->capability,
1527 p->rangelow, p->rangehigh,
1528 p->txsubchans);
1529 break;
1530 }
1531 case VIDIOC_S_MODULATOR:
1532 {
1533 struct v4l2_modulator *p = arg;
1534
1535 if (!ops->vidioc_s_modulator)
1536 break;
1537 if (ret_prio) {
1538 ret = ret_prio;
1539 break;
1540 }
1541 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1542 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1543 p->index, p->name, p->capability, p->rangelow,
1544 p->rangehigh, p->txsubchans);
1545 ret = ops->vidioc_s_modulator(file, fh, p);
1546 break;
1547 }
1548 case VIDIOC_G_CROP:
1549 {
1550 struct v4l2_crop *p = arg;
1551
1552 if (!ops->vidioc_g_crop && !ops->vidioc_g_selection)
1553 break;
1554
1555 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1556
1557 if (ops->vidioc_g_crop) {
1558 ret = ops->vidioc_g_crop(file, fh, p);
1559 } else {
1560 /* simulate capture crop using selection api */
1561 struct v4l2_selection s = {
1562 .type = p->type,
1563 };
1564
1565 /* crop means compose for output devices */
1566 if (V4L2_TYPE_IS_OUTPUT(p->type))
1567 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1568 else
1569 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1570
1571 ret = ops->vidioc_g_selection(file, fh, &s);
1572
1573 /* copying results to old structure on success */
1574 if (!ret)
1575 p->c = s.r;
1576 }
1577
1578 if (!ret)
1579 dbgrect(vfd, "", &p->c);
1580 break;
1581 }
1582 case VIDIOC_S_CROP:
1583 {
1584 struct v4l2_crop *p = arg;
1585
1586 if (!ops->vidioc_s_crop && !ops->vidioc_s_selection)
1587 break;
1588
1589 if (ret_prio) {
1590 ret = ret_prio;
1591 break;
1592 }
1593 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1594 dbgrect(vfd, "", &p->c);
1595
1596 if (ops->vidioc_s_crop) {
1597 ret = ops->vidioc_s_crop(file, fh, p);
1598 } else {
1599 /* simulate capture crop using selection api */
1600 struct v4l2_selection s = {
1601 .type = p->type,
1602 .r = p->c,
1603 };
1604
1605 /* crop means compose for output devices */
1606 if (V4L2_TYPE_IS_OUTPUT(p->type))
1607 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
1608 else
1609 s.target = V4L2_SEL_TGT_CROP_ACTIVE;
1610
1611 ret = ops->vidioc_s_selection(file, fh, &s);
1612 }
1613 break;
1614 }
1615 case VIDIOC_G_SELECTION:
1616 {
1617 struct v4l2_selection *p = arg;
1618
1619 if (!ops->vidioc_g_selection)
1620 break;
1621
1622 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1623
1624 ret = ops->vidioc_g_selection(file, fh, p);
1625 if (!ret)
1626 dbgrect(vfd, "", &p->r);
1627 break;
1628 }
1629 case VIDIOC_S_SELECTION:
1630 {
1631 struct v4l2_selection *p = arg;
1632
1633 if (!ops->vidioc_s_selection)
1634 break;
1635
1636 if (ret_prio) {
1637 ret = ret_prio;
1638 break;
1639 }
1640
1641 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1642 dbgrect(vfd, "", &p->r);
1643
1644 ret = ops->vidioc_s_selection(file, fh, p);
1645 break;
1646 }
1647 case VIDIOC_CROPCAP:
1648 {
1649 struct v4l2_cropcap *p = arg;
1650
1651 /*FIXME: Should also show v4l2_fract pixelaspect */
1652 if (!ops->vidioc_cropcap && !ops->vidioc_g_selection)
1653 break;
1654
1655 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1656 if (ops->vidioc_cropcap) {
1657 ret = ops->vidioc_cropcap(file, fh, p);
1658 } else {
1659 struct v4l2_selection s = { .type = p->type };
1660
1661 /* obtaining bounds */
1662 if (V4L2_TYPE_IS_OUTPUT(p->type))
1663 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
1664 else
1665 s.target = V4L2_SEL_TGT_CROP_BOUNDS;
1666
1667 ret = ops->vidioc_g_selection(file, fh, &s);
1668 if (ret)
1669 break;
1670 p->bounds = s.r;
1671
1672 /* obtaining defrect */
1673 if (V4L2_TYPE_IS_OUTPUT(p->type))
1674 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
1675 else
1676 s.target = V4L2_SEL_TGT_CROP_DEFAULT;
1677
1678 ret = ops->vidioc_g_selection(file, fh, &s);
1679 if (ret)
1680 break;
1681 p->defrect = s.r;
1682
1683 /* setting trivial pixelaspect */
1684 p->pixelaspect.numerator = 1;
1685 p->pixelaspect.denominator = 1;
1686 }
1687
1688 if (!ret) {
1689 dbgrect(vfd, "bounds ", &p->bounds);
1690 dbgrect(vfd, "defrect ", &p->defrect);
1691 }
1692 break;
1693 }
1694 case VIDIOC_G_JPEGCOMP:
1695 {
1696 struct v4l2_jpegcompression *p = arg;
1697
1698 if (!ops->vidioc_g_jpegcomp)
1699 break;
1700
1701 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1702 if (!ret)
1703 dbgarg(cmd, "quality=%d, APPn=%d, "
1704 "APP_len=%d, COM_len=%d, "
1705 "jpeg_markers=%d\n",
1706 p->quality, p->APPn, p->APP_len,
1707 p->COM_len, p->jpeg_markers);
1708 break;
1709 }
1710 case VIDIOC_S_JPEGCOMP:
1711 {
1712 struct v4l2_jpegcompression *p = arg;
1713
1714 if (!ops->vidioc_g_jpegcomp)
1715 break;
1716 if (ret_prio) {
1717 ret = ret_prio;
1718 break;
1719 }
1720 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1721 "COM_len=%d, jpeg_markers=%d\n",
1722 p->quality, p->APPn, p->APP_len,
1723 p->COM_len, p->jpeg_markers);
1724 ret = ops->vidioc_s_jpegcomp(file, fh, p);
1725 break;
1726 }
1727 case VIDIOC_G_ENC_INDEX:
1728 {
1729 struct v4l2_enc_idx *p = arg;
1730
1731 if (!ops->vidioc_g_enc_index)
1732 break;
1733 ret = ops->vidioc_g_enc_index(file, fh, p);
1734 if (!ret)
1735 dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1736 p->entries, p->entries_cap);
1737 break;
1738 }
1739 case VIDIOC_ENCODER_CMD:
1740 {
1741 struct v4l2_encoder_cmd *p = arg;
1742
1743 if (!ops->vidioc_encoder_cmd)
1744 break;
1745 if (ret_prio) {
1746 ret = ret_prio;
1747 break;
1748 }
1749 ret = ops->vidioc_encoder_cmd(file, fh, p);
1750 if (!ret)
1751 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1752 break;
1753 }
1754 case VIDIOC_TRY_ENCODER_CMD:
1755 {
1756 struct v4l2_encoder_cmd *p = arg;
1757
1758 if (!ops->vidioc_try_encoder_cmd)
1759 break;
1760 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1761 if (!ret)
1762 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1763 break;
1764 }
1765 case VIDIOC_G_PARM:
1766 {
1767 struct v4l2_streamparm *p = arg;
1768
1769 if (!ops->vidioc_g_parm && !vfd->current_norm)
1770 break;
1771 if (ops->vidioc_g_parm) {
1772 ret = check_fmt(ops, p->type);
1773 if (ret)
1774 break;
1775 ret = ops->vidioc_g_parm(file, fh, p);
1776 } else {
1777 v4l2_std_id std = vfd->current_norm;
1778
1779 ret = -EINVAL;
1780 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1781 break;
1782
1783 ret = 0;
1784 if (ops->vidioc_g_std)
1785 ret = ops->vidioc_g_std(file, fh, &std);
1786 if (ret == 0)
1787 v4l2_video_std_frame_period(std,
1788 &p->parm.capture.timeperframe);
1789 }
1790
1791 dbgarg(cmd, "type=%d\n", p->type);
1792 break;
1793 }
1794 case VIDIOC_S_PARM:
1795 {
1796 struct v4l2_streamparm *p = arg;
1797
1798 if (!ops->vidioc_s_parm)
1799 break;
1800 if (ret_prio) {
1801 ret = ret_prio;
1802 break;
1803 }
1804 ret = check_fmt(ops, p->type);
1805 if (ret)
1806 break;
1807
1808 dbgarg(cmd, "type=%d\n", p->type);
1809 ret = ops->vidioc_s_parm(file, fh, p);
1810 break;
1811 }
1812 case VIDIOC_G_TUNER:
1813 {
1814 struct v4l2_tuner *p = arg;
1815
1816 if (!ops->vidioc_g_tuner)
1817 break;
1818
1819 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1820 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1821 ret = ops->vidioc_g_tuner(file, fh, p);
1822 if (!ret)
1823 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1824 "capability=0x%x, rangelow=%d, "
1825 "rangehigh=%d, signal=%d, afc=%d, "
1826 "rxsubchans=0x%x, audmode=%d\n",
1827 p->index, p->name, p->type,
1828 p->capability, p->rangelow,
1829 p->rangehigh, p->signal, p->afc,
1830 p->rxsubchans, p->audmode);
1831 break;
1832 }
1833 case VIDIOC_S_TUNER:
1834 {
1835 struct v4l2_tuner *p = arg;
1836
1837 if (!ops->vidioc_s_tuner)
1838 break;
1839 if (ret_prio) {
1840 ret = ret_prio;
1841 break;
1842 }
1843 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1844 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1845 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1846 "capability=0x%x, rangelow=%d, "
1847 "rangehigh=%d, signal=%d, afc=%d, "
1848 "rxsubchans=0x%x, audmode=%d\n",
1849 p->index, p->name, p->type,
1850 p->capability, p->rangelow,
1851 p->rangehigh, p->signal, p->afc,
1852 p->rxsubchans, p->audmode);
1853 ret = ops->vidioc_s_tuner(file, fh, p);
1854 break;
1855 }
1856 case VIDIOC_G_FREQUENCY:
1857 {
1858 struct v4l2_frequency *p = arg;
1859
1860 if (!ops->vidioc_g_frequency)
1861 break;
1862
1863 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1864 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1865 ret = ops->vidioc_g_frequency(file, fh, p);
1866 if (!ret)
1867 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1868 p->tuner, p->type, p->frequency);
1869 break;
1870 }
1871 case VIDIOC_S_FREQUENCY:
1872 {
1873 struct v4l2_frequency *p = arg;
1874 enum v4l2_tuner_type type;
1875
1876 if (!ops->vidioc_s_frequency)
1877 break;
1878 if (ret_prio) {
1879 ret = ret_prio;
1880 break;
1881 }
1882 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1883 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1884 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1885 p->tuner, p->type, p->frequency);
1886 if (p->type != type)
1887 ret = -EINVAL;
1888 else
1889 ret = ops->vidioc_s_frequency(file, fh, p);
1890 break;
1891 }
1892 case VIDIOC_G_SLICED_VBI_CAP:
1893 {
1894 struct v4l2_sliced_vbi_cap *p = arg;
1895
1896 if (!ops->vidioc_g_sliced_vbi_cap)
1897 break;
1898
1899 /* Clear up to type, everything after type is zerod already */
1900 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1901
1902 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1903 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1904 if (!ret)
1905 dbgarg2("service_set=%d\n", p->service_set);
1906 break;
1907 }
1908 case VIDIOC_LOG_STATUS:
1909 {
1910 if (!ops->vidioc_log_status)
1911 break;
1912 ret = ops->vidioc_log_status(file, fh);
1913 break;
1914 }
1915 #ifdef CONFIG_VIDEO_ADV_DEBUG
1916 case VIDIOC_DBG_G_REGISTER:
1917 {
1918 struct v4l2_dbg_register *p = arg;
1919
1920 if (ops->vidioc_g_register) {
1921 if (!capable(CAP_SYS_ADMIN))
1922 ret = -EPERM;
1923 else
1924 ret = ops->vidioc_g_register(file, fh, p);
1925 }
1926 break;
1927 }
1928 case VIDIOC_DBG_S_REGISTER:
1929 {
1930 struct v4l2_dbg_register *p = arg;
1931
1932 if (ops->vidioc_s_register) {
1933 if (!capable(CAP_SYS_ADMIN))
1934 ret = -EPERM;
1935 else
1936 ret = ops->vidioc_s_register(file, fh, p);
1937 }
1938 break;
1939 }
1940 #endif
1941 case VIDIOC_DBG_G_CHIP_IDENT:
1942 {
1943 struct v4l2_dbg_chip_ident *p = arg;
1944
1945 if (!ops->vidioc_g_chip_ident)
1946 break;
1947 p->ident = V4L2_IDENT_NONE;
1948 p->revision = 0;
1949 ret = ops->vidioc_g_chip_ident(file, fh, p);
1950 if (!ret)
1951 dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1952 break;
1953 }
1954 case VIDIOC_S_HW_FREQ_SEEK:
1955 {
1956 struct v4l2_hw_freq_seek *p = arg;
1957 enum v4l2_tuner_type type;
1958
1959 if (!ops->vidioc_s_hw_freq_seek)
1960 break;
1961 if (ret_prio) {
1962 ret = ret_prio;
1963 break;
1964 }
1965 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1966 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1967 dbgarg(cmd,
1968 "tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
1969 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
1970 if (p->type != type)
1971 ret = -EINVAL;
1972 else
1973 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1974 break;
1975 }
1976 case VIDIOC_ENUM_FRAMESIZES:
1977 {
1978 struct v4l2_frmsizeenum *p = arg;
1979
1980 if (!ops->vidioc_enum_framesizes)
1981 break;
1982
1983 ret = ops->vidioc_enum_framesizes(file, fh, p);
1984 dbgarg(cmd,
1985 "index=%d, pixelformat=%c%c%c%c, type=%d ",
1986 p->index,
1987 (p->pixel_format & 0xff),
1988 (p->pixel_format >> 8) & 0xff,
1989 (p->pixel_format >> 16) & 0xff,
1990 (p->pixel_format >> 24) & 0xff,
1991 p->type);
1992 switch (p->type) {
1993 case V4L2_FRMSIZE_TYPE_DISCRETE:
1994 dbgarg3("width = %d, height=%d\n",
1995 p->discrete.width, p->discrete.height);
1996 break;
1997 case V4L2_FRMSIZE_TYPE_STEPWISE:
1998 dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
1999 p->stepwise.min_width, p->stepwise.min_height,
2000 p->stepwise.step_width, p->stepwise.step_height,
2001 p->stepwise.max_width, p->stepwise.max_height);
2002 break;
2003 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2004 dbgarg3("continuous\n");
2005 break;
2006 default:
2007 dbgarg3("- Unknown type!\n");
2008 }
2009
2010 break;
2011 }
2012 case VIDIOC_ENUM_FRAMEINTERVALS:
2013 {
2014 struct v4l2_frmivalenum *p = arg;
2015
2016 if (!ops->vidioc_enum_frameintervals)
2017 break;
2018
2019 ret = ops->vidioc_enum_frameintervals(file, fh, p);
2020 dbgarg(cmd,
2021 "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
2022 p->index, p->pixel_format,
2023 p->width, p->height, p->type);
2024 switch (p->type) {
2025 case V4L2_FRMIVAL_TYPE_DISCRETE:
2026 dbgarg2("fps=%d/%d\n",
2027 p->discrete.numerator,
2028 p->discrete.denominator);
2029 break;
2030 case V4L2_FRMIVAL_TYPE_STEPWISE:
2031 dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
2032 p->stepwise.min.numerator,
2033 p->stepwise.min.denominator,
2034 p->stepwise.max.numerator,
2035 p->stepwise.max.denominator,
2036 p->stepwise.step.numerator,
2037 p->stepwise.step.denominator);
2038 break;
2039 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2040 dbgarg2("continuous\n");
2041 break;
2042 default:
2043 dbgarg2("- Unknown type!\n");
2044 }
2045 break;
2046 }
2047 case VIDIOC_ENUM_DV_PRESETS:
2048 {
2049 struct v4l2_dv_enum_preset *p = arg;
2050
2051 if (!ops->vidioc_enum_dv_presets)
2052 break;
2053
2054 ret = ops->vidioc_enum_dv_presets(file, fh, p);
2055 if (!ret)
2056 dbgarg(cmd,
2057 "index=%d, preset=%d, name=%s, width=%d,"
2058 " height=%d ",
2059 p->index, p->preset, p->name, p->width,
2060 p->height);
2061 break;
2062 }
2063 case VIDIOC_S_DV_PRESET:
2064 {
2065 struct v4l2_dv_preset *p = arg;
2066
2067 if (!ops->vidioc_s_dv_preset)
2068 break;
2069 if (ret_prio) {
2070 ret = ret_prio;
2071 break;
2072 }
2073
2074 dbgarg(cmd, "preset=%d\n", p->preset);
2075 ret = ops->vidioc_s_dv_preset(file, fh, p);
2076 break;
2077 }
2078 case VIDIOC_G_DV_PRESET:
2079 {
2080 struct v4l2_dv_preset *p = arg;
2081
2082 if (!ops->vidioc_g_dv_preset)
2083 break;
2084
2085 ret = ops->vidioc_g_dv_preset(file, fh, p);
2086 if (!ret)
2087 dbgarg(cmd, "preset=%d\n", p->preset);
2088 break;
2089 }
2090 case VIDIOC_QUERY_DV_PRESET:
2091 {
2092 struct v4l2_dv_preset *p = arg;
2093
2094 if (!ops->vidioc_query_dv_preset)
2095 break;
2096
2097 ret = ops->vidioc_query_dv_preset(file, fh, p);
2098 if (!ret)
2099 dbgarg(cmd, "preset=%d\n", p->preset);
2100 break;
2101 }
2102 case VIDIOC_S_DV_TIMINGS:
2103 {
2104 struct v4l2_dv_timings *p = arg;
2105
2106 if (!ops->vidioc_s_dv_timings)
2107 break;
2108 if (ret_prio) {
2109 ret = ret_prio;
2110 break;
2111 }
2112
2113 switch (p->type) {
2114 case V4L2_DV_BT_656_1120:
2115 dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
2116 " width=%d, height=%d, polarities=%x,"
2117 " hfrontporch=%d, hsync=%d, hbackporch=%d,"
2118 " vfrontporch=%d, vsync=%d, vbackporch=%d,"
2119 " il_vfrontporch=%d, il_vsync=%d,"
2120 " il_vbackporch=%d\n",
2121 p->bt.interlaced, p->bt.pixelclock,
2122 p->bt.width, p->bt.height, p->bt.polarities,
2123 p->bt.hfrontporch, p->bt.hsync,
2124 p->bt.hbackporch, p->bt.vfrontporch,
2125 p->bt.vsync, p->bt.vbackporch,
2126 p->bt.il_vfrontporch, p->bt.il_vsync,
2127 p->bt.il_vbackporch);
2128 ret = ops->vidioc_s_dv_timings(file, fh, p);
2129 break;
2130 default:
2131 dbgarg2("Unknown type %d!\n", p->type);
2132 break;
2133 }
2134 break;
2135 }
2136 case VIDIOC_G_DV_TIMINGS:
2137 {
2138 struct v4l2_dv_timings *p = arg;
2139
2140 if (!ops->vidioc_g_dv_timings)
2141 break;
2142
2143 ret = ops->vidioc_g_dv_timings(file, fh, p);
2144 if (!ret) {
2145 switch (p->type) {
2146 case V4L2_DV_BT_656_1120:
2147 dbgarg2("bt-656/1120:interlaced=%d,"
2148 " pixelclock=%lld,"
2149 " width=%d, height=%d, polarities=%x,"
2150 " hfrontporch=%d, hsync=%d,"
2151 " hbackporch=%d, vfrontporch=%d,"
2152 " vsync=%d, vbackporch=%d,"
2153 " il_vfrontporch=%d, il_vsync=%d,"
2154 " il_vbackporch=%d\n",
2155 p->bt.interlaced, p->bt.pixelclock,
2156 p->bt.width, p->bt.height,
2157 p->bt.polarities, p->bt.hfrontporch,
2158 p->bt.hsync, p->bt.hbackporch,
2159 p->bt.vfrontporch, p->bt.vsync,
2160 p->bt.vbackporch, p->bt.il_vfrontporch,
2161 p->bt.il_vsync, p->bt.il_vbackporch);
2162 break;
2163 default:
2164 dbgarg2("Unknown type %d!\n", p->type);
2165 break;
2166 }
2167 }
2168 break;
2169 }
2170 case VIDIOC_DQEVENT:
2171 {
2172 struct v4l2_event *ev = arg;
2173
2174 if (!ops->vidioc_subscribe_event)
2175 break;
2176
2177 ret = v4l2_event_dequeue(fh, ev, file->f_flags & O_NONBLOCK);
2178 if (ret < 0) {
2179 dbgarg(cmd, "no pending events?");
2180 break;
2181 }
2182 dbgarg(cmd,
2183 "pending=%d, type=0x%8.8x, sequence=%d, "
2184 "timestamp=%lu.%9.9lu ",
2185 ev->pending, ev->type, ev->sequence,
2186 ev->timestamp.tv_sec, ev->timestamp.tv_nsec);
2187 break;
2188 }
2189 case VIDIOC_SUBSCRIBE_EVENT:
2190 {
2191 struct v4l2_event_subscription *sub = arg;
2192
2193 if (!ops->vidioc_subscribe_event)
2194 break;
2195
2196 ret = ops->vidioc_subscribe_event(fh, sub);
2197 if (ret < 0) {
2198 dbgarg(cmd, "failed, ret=%ld", ret);
2199 break;
2200 }
2201 dbgarg(cmd, "type=0x%8.8x", sub->type);
2202 break;
2203 }
2204 case VIDIOC_UNSUBSCRIBE_EVENT:
2205 {
2206 struct v4l2_event_subscription *sub = arg;
2207
2208 if (!ops->vidioc_unsubscribe_event)
2209 break;
2210
2211 ret = ops->vidioc_unsubscribe_event(fh, sub);
2212 if (ret < 0) {
2213 dbgarg(cmd, "failed, ret=%ld", ret);
2214 break;
2215 }
2216 dbgarg(cmd, "type=0x%8.8x", sub->type);
2217 break;
2218 }
2219 case VIDIOC_CREATE_BUFS:
2220 {
2221 struct v4l2_create_buffers *create = arg;
2222
2223 if (!ops->vidioc_create_bufs)
2224 break;
2225 if (ret_prio) {
2226 ret = ret_prio;
2227 break;
2228 }
2229 ret = check_fmt(ops, create->format.type);
2230 if (ret)
2231 break;
2232
2233 ret = ops->vidioc_create_bufs(file, fh, create);
2234
2235 dbgarg(cmd, "count=%d @ %d\n", create->count, create->index);
2236 break;
2237 }
2238 case VIDIOC_PREPARE_BUF:
2239 {
2240 struct v4l2_buffer *b = arg;
2241
2242 if (!ops->vidioc_prepare_buf)
2243 break;
2244 ret = check_fmt(ops, b->type);
2245 if (ret)
2246 break;
2247
2248 ret = ops->vidioc_prepare_buf(file, fh, b);
2249
2250 dbgarg(cmd, "index=%d", b->index);
2251 break;
2252 }
2253 default:
2254 if (!ops->vidioc_default)
2255 break;
2256 ret = ops->vidioc_default(file, fh, ret_prio >= 0, cmd, arg);
2257 break;
2258 } /* switch */
2259
2260 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
2261 if (ret < 0) {
2262 v4l_print_ioctl(vfd->name, cmd);
2263 printk(KERN_CONT " error %ld\n", ret);
2264 }
2265 }
2266
2267 return ret;
2268 }
2269
2270 /* In some cases, only a few fields are used as input, i.e. when the app sets
2271 * "index" and then the driver fills in the rest of the structure for the thing
2272 * with that index. We only need to copy up the first non-input field. */
2273 static unsigned long cmd_input_size(unsigned int cmd)
2274 {
2275 /* Size of structure up to and including 'field' */
2276 #define CMDINSIZE(cmd, type, field) \
2277 case VIDIOC_##cmd: \
2278 return offsetof(struct v4l2_##type, field) + \
2279 sizeof(((struct v4l2_##type *)0)->field);
2280
2281 switch (cmd) {
2282 CMDINSIZE(ENUM_FMT, fmtdesc, type);
2283 CMDINSIZE(G_FMT, format, type);
2284 CMDINSIZE(QUERYBUF, buffer, length);
2285 CMDINSIZE(G_PARM, streamparm, type);
2286 CMDINSIZE(ENUMSTD, standard, index);
2287 CMDINSIZE(ENUMINPUT, input, index);
2288 CMDINSIZE(G_CTRL, control, id);
2289 CMDINSIZE(G_TUNER, tuner, index);
2290 CMDINSIZE(QUERYCTRL, queryctrl, id);
2291 CMDINSIZE(QUERYMENU, querymenu, index);
2292 CMDINSIZE(ENUMOUTPUT, output, index);
2293 CMDINSIZE(G_MODULATOR, modulator, index);
2294 CMDINSIZE(G_FREQUENCY, frequency, tuner);
2295 CMDINSIZE(CROPCAP, cropcap, type);
2296 CMDINSIZE(G_CROP, crop, type);
2297 CMDINSIZE(ENUMAUDIO, audio, index);
2298 CMDINSIZE(ENUMAUDOUT, audioout, index);
2299 CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
2300 CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
2301 CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
2302 CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
2303 CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
2304 default:
2305 return _IOC_SIZE(cmd);
2306 }
2307 }
2308
2309 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2310 void * __user *user_ptr, void ***kernel_ptr)
2311 {
2312 int ret = 0;
2313
2314 switch (cmd) {
2315 case VIDIOC_QUERYBUF:
2316 case VIDIOC_QBUF:
2317 case VIDIOC_DQBUF: {
2318 struct v4l2_buffer *buf = parg;
2319
2320 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2321 if (buf->length > VIDEO_MAX_PLANES) {
2322 ret = -EINVAL;
2323 break;
2324 }
2325 *user_ptr = (void __user *)buf->m.planes;
2326 *kernel_ptr = (void *)&buf->m.planes;
2327 *array_size = sizeof(struct v4l2_plane) * buf->length;
2328 ret = 1;
2329 }
2330 break;
2331 }
2332
2333 case VIDIOC_S_EXT_CTRLS:
2334 case VIDIOC_G_EXT_CTRLS:
2335 case VIDIOC_TRY_EXT_CTRLS: {
2336 struct v4l2_ext_controls *ctrls = parg;
2337
2338 if (ctrls->count != 0) {
2339 if (ctrls->count > V4L2_CID_MAX_CTRLS) {
2340 ret = -EINVAL;
2341 break;
2342 }
2343 *user_ptr = (void __user *)ctrls->controls;
2344 *kernel_ptr = (void *)&ctrls->controls;
2345 *array_size = sizeof(struct v4l2_ext_control)
2346 * ctrls->count;
2347 ret = 1;
2348 }
2349 break;
2350 }
2351 }
2352
2353 return ret;
2354 }
2355
2356 long
2357 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2358 v4l2_kioctl func)
2359 {
2360 char sbuf[128];
2361 void *mbuf = NULL;
2362 void *parg = (void *)arg;
2363 long err = -EINVAL;
2364 bool has_array_args;
2365 size_t array_size = 0;
2366 void __user *user_ptr = NULL;
2367 void **kernel_ptr = NULL;
2368
2369 /* Copy arguments into temp kernel buffer */
2370 if (_IOC_DIR(cmd) != _IOC_NONE) {
2371 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2372 parg = sbuf;
2373 } else {
2374 /* too big to allocate from stack */
2375 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2376 if (NULL == mbuf)
2377 return -ENOMEM;
2378 parg = mbuf;
2379 }
2380
2381 err = -EFAULT;
2382 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2383 unsigned long n = cmd_input_size(cmd);
2384
2385 if (copy_from_user(parg, (void __user *)arg, n))
2386 goto out;
2387
2388 /* zero out anything we don't copy from userspace */
2389 if (n < _IOC_SIZE(cmd))
2390 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2391 } else {
2392 /* read-only ioctl */
2393 memset(parg, 0, _IOC_SIZE(cmd));
2394 }
2395 }
2396
2397 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2398 if (err < 0)
2399 goto out;
2400 has_array_args = err;
2401
2402 if (has_array_args) {
2403 /*
2404 * When adding new types of array args, make sure that the
2405 * parent argument to ioctl (which contains the pointer to the
2406 * array) fits into sbuf (so that mbuf will still remain
2407 * unused up to here).
2408 */
2409 mbuf = kmalloc(array_size, GFP_KERNEL);
2410 err = -ENOMEM;
2411 if (NULL == mbuf)
2412 goto out_array_args;
2413 err = -EFAULT;
2414 if (copy_from_user(mbuf, user_ptr, array_size))
2415 goto out_array_args;
2416 *kernel_ptr = mbuf;
2417 }
2418
2419 /* Handles IOCTL */
2420 err = func(file, cmd, parg);
2421 if (err == -ENOIOCTLCMD)
2422 err = -EINVAL;
2423
2424 if (has_array_args) {
2425 *kernel_ptr = user_ptr;
2426 if (copy_to_user(user_ptr, mbuf, array_size))
2427 err = -EFAULT;
2428 goto out_array_args;
2429 }
2430 if (err < 0)
2431 goto out;
2432
2433 out_array_args:
2434 /* Copy results into user buffer */
2435 switch (_IOC_DIR(cmd)) {
2436 case _IOC_READ:
2437 case (_IOC_WRITE | _IOC_READ):
2438 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2439 err = -EFAULT;
2440 break;
2441 }
2442
2443 out:
2444 kfree(mbuf);
2445 return err;
2446 }
2447 EXPORT_SYMBOL(video_usercopy);
2448
2449 long video_ioctl2(struct file *file,
2450 unsigned int cmd, unsigned long arg)
2451 {
2452 return video_usercopy(file, cmd, arg, __video_do_ioctl);
2453 }
2454 EXPORT_SYMBOL(video_ioctl2);