projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-2.6
[deliverable/linux.git] / drivers / media / video / v4l2-ioctl.c
1 /*
2 * Video capture interface for Linux version 2
3 *
4 * A generic framework to process V4L2 ioctl commands.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13 */
14
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18
19 #define __OLD_VIDIOC_ /* To allow fixing old calls */
20 #include <linux/videodev.h>
21 #include <linux/videodev2.h>
22
23 #ifdef CONFIG_VIDEO_V4L1
24 #include <linux/videodev.h>
25 #endif
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-ioctl.h>
28 #include <media/v4l2-chip-ident.h>
29
30 #define dbgarg(cmd, fmt, arg...) \
31 do { \
32 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \
33 printk(KERN_DEBUG "%s: ", vfd->name); \
34 v4l_printk_ioctl(cmd); \
35 printk(" " fmt, ## arg); \
36 } \
37 } while (0)
38
39 #define dbgarg2(fmt, arg...) \
40 do { \
41 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
42 printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
43 } while (0)
44
45 struct std_descr {
46 v4l2_std_id std;
47 const char *descr;
48 };
49
50 static const struct std_descr standards[] = {
51 { V4L2_STD_NTSC, "NTSC" },
52 { V4L2_STD_NTSC_M, "NTSC-M" },
53 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
54 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
55 { V4L2_STD_NTSC_443, "NTSC-443" },
56 { V4L2_STD_PAL, "PAL" },
57 { V4L2_STD_PAL_BG, "PAL-BG" },
58 { V4L2_STD_PAL_B, "PAL-B" },
59 { V4L2_STD_PAL_B1, "PAL-B1" },
60 { V4L2_STD_PAL_G, "PAL-G" },
61 { V4L2_STD_PAL_H, "PAL-H" },
62 { V4L2_STD_PAL_I, "PAL-I" },
63 { V4L2_STD_PAL_DK, "PAL-DK" },
64 { V4L2_STD_PAL_D, "PAL-D" },
65 { V4L2_STD_PAL_D1, "PAL-D1" },
66 { V4L2_STD_PAL_K, "PAL-K" },
67 { V4L2_STD_PAL_M, "PAL-M" },
68 { V4L2_STD_PAL_N, "PAL-N" },
69 { V4L2_STD_PAL_Nc, "PAL-Nc" },
70 { V4L2_STD_PAL_60, "PAL-60" },
71 { V4L2_STD_SECAM, "SECAM" },
72 { V4L2_STD_SECAM_B, "SECAM-B" },
73 { V4L2_STD_SECAM_G, "SECAM-G" },
74 { V4L2_STD_SECAM_H, "SECAM-H" },
75 { V4L2_STD_SECAM_DK, "SECAM-DK" },
76 { V4L2_STD_SECAM_D, "SECAM-D" },
77 { V4L2_STD_SECAM_K, "SECAM-K" },
78 { V4L2_STD_SECAM_K1, "SECAM-K1" },
79 { V4L2_STD_SECAM_L, "SECAM-L" },
80 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
81 { 0, "Unknown" }
82 };
83
84 /* video4linux standard ID conversion to standard name
85 */
86 const char *v4l2_norm_to_name(v4l2_std_id id)
87 {
88 u32 myid = id;
89 int i;
90
91 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
92 64 bit comparations. So, on that architecture, with some gcc
93 variants, compilation fails. Currently, the max value is 30bit wide.
94 */
95 BUG_ON(myid != id);
96
97 for (i = 0; standards[i].std; i++)
98 if (myid == standards[i].std)
99 break;
100 return standards[i].descr;
101 }
102 EXPORT_SYMBOL(v4l2_norm_to_name);
103
104 /* Returns frame period for the given standard */
105 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
106 {
107 if (id & V4L2_STD_525_60) {
108 frameperiod->numerator = 1001;
109 frameperiod->denominator = 30000;
110 } else {
111 frameperiod->numerator = 1;
112 frameperiod->denominator = 25;
113 }
114 }
115 EXPORT_SYMBOL(v4l2_video_std_frame_period);
116
117 /* Fill in the fields of a v4l2_standard structure according to the
118 'id' and 'transmission' parameters. Returns negative on error. */
119 int v4l2_video_std_construct(struct v4l2_standard *vs,
120 int id, const char *name)
121 {
122 vs->id = id;
123 v4l2_video_std_frame_period(id, &vs->frameperiod);
124 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
125 strlcpy(vs->name, name, sizeof(vs->name));
126 return 0;
127 }
128 EXPORT_SYMBOL(v4l2_video_std_construct);
129
130 /* ----------------------------------------------------------------- */
131 /* some arrays for pretty-printing debug messages of enum types */
132
133 const char *v4l2_field_names[] = {
134 [V4L2_FIELD_ANY] = "any",
135 [V4L2_FIELD_NONE] = "none",
136 [V4L2_FIELD_TOP] = "top",
137 [V4L2_FIELD_BOTTOM] = "bottom",
138 [V4L2_FIELD_INTERLACED] = "interlaced",
139 [V4L2_FIELD_SEQ_TB] = "seq-tb",
140 [V4L2_FIELD_SEQ_BT] = "seq-bt",
141 [V4L2_FIELD_ALTERNATE] = "alternate",
142 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
143 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
144 };
145 EXPORT_SYMBOL(v4l2_field_names);
146
147 const char *v4l2_type_names[] = {
148 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
149 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
150 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
151 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
152 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
153 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
154 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
155 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
156 };
157 EXPORT_SYMBOL(v4l2_type_names);
158
159 static const char *v4l2_memory_names[] = {
160 [V4L2_MEMORY_MMAP] = "mmap",
161 [V4L2_MEMORY_USERPTR] = "userptr",
162 [V4L2_MEMORY_OVERLAY] = "overlay",
163 };
164
165 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
166 arr[a] : "unknown")
167
168 /* ------------------------------------------------------------------ */
169 /* debug help functions */
170
171 #ifdef CONFIG_VIDEO_V4L1_COMPAT
172 static const char *v4l1_ioctls[] = {
173 [_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
174 [_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
175 [_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
176 [_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
177 [_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
178 [_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
179 [_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
180 [_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
181 [_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
182 [_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
183 [_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
184 [_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
185 [_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
186 [_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
187 [_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
188 [_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
189 [_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
190 [_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
191 [_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
192 [_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
193 [_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
194 [_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
195 [_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
196 [_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
197 [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
198 [_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
199 [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
200 [_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
201 [_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
202 };
203 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
204 #endif
205
206 static const char *v4l2_ioctls[] = {
207 [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
208 [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
209 [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
210 [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
211 [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
212 [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
213 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
214 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
215 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
216 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
217 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
218 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
219 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
220 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
221 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
222 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
223 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
224 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
225 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
226 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
227 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
228 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
229 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
230 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
231 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
232 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
233 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
234 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
235 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
236 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
237 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
238 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
239 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
240 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
241 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
242 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
243 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
244 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
245 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
246 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
247 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
248 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
249 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
250 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
251 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
252 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
253 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
254 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
255 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
256 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
257 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
258 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
259 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
260 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
261 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
262 #if 1
263 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
264 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
265 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
266 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
267 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
268
269 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
270 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
271
272 [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
273 [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK",
274 #endif
275 };
276 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
277
278 /* Common ioctl debug function. This function can be used by
279 external ioctl messages as well as internal V4L ioctl */
280 void v4l_printk_ioctl(unsigned int cmd)
281 {
282 char *dir, *type;
283
284 switch (_IOC_TYPE(cmd)) {
285 case 'd':
286 type = "v4l2_int";
287 break;
288 #ifdef CONFIG_VIDEO_V4L1_COMPAT
289 case 'v':
290 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
291 type = "v4l1";
292 break;
293 }
294 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
295 return;
296 #endif
297 case 'V':
298 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
299 type = "v4l2";
300 break;
301 }
302 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
303 return;
304 default:
305 type = "unknown";
306 }
307
308 switch (_IOC_DIR(cmd)) {
309 case _IOC_NONE: dir = "--"; break;
310 case _IOC_READ: dir = "r-"; break;
311 case _IOC_WRITE: dir = "-w"; break;
312 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
313 default: dir = "*ERR*"; break;
314 }
315 printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
316 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
317 }
318 EXPORT_SYMBOL(v4l_printk_ioctl);
319
320 /*
321 * helper function -- handles userspace copying for ioctl arguments
322 */
323
324 #ifdef __OLD_VIDIOC_
325 static unsigned int
326 video_fix_command(unsigned int cmd)
327 {
328 switch (cmd) {
329 case VIDIOC_OVERLAY_OLD:
330 cmd = VIDIOC_OVERLAY;
331 break;
332 case VIDIOC_S_PARM_OLD:
333 cmd = VIDIOC_S_PARM;
334 break;
335 case VIDIOC_S_CTRL_OLD:
336 cmd = VIDIOC_S_CTRL;
337 break;
338 case VIDIOC_G_AUDIO_OLD:
339 cmd = VIDIOC_G_AUDIO;
340 break;
341 case VIDIOC_G_AUDOUT_OLD:
342 cmd = VIDIOC_G_AUDOUT;
343 break;
344 case VIDIOC_CROPCAP_OLD:
345 cmd = VIDIOC_CROPCAP;
346 break;
347 }
348 return cmd;
349 }
350 #endif
351
352 /*
353 * Obsolete usercopy function - Should be removed soon
354 */
355 long
356 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
357 v4l2_kioctl func)
358 {
359 char sbuf[128];
360 void *mbuf = NULL;
361 void *parg = NULL;
362 long err = -EINVAL;
363 int is_ext_ctrl;
364 size_t ctrls_size = 0;
365 void __user *user_ptr = NULL;
366
367 #ifdef __OLD_VIDIOC_
368 cmd = video_fix_command(cmd);
369 #endif
370 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
371 cmd == VIDIOC_TRY_EXT_CTRLS);
372
373 /* Copy arguments into temp kernel buffer */
374 switch (_IOC_DIR(cmd)) {
375 case _IOC_NONE:
376 parg = NULL;
377 break;
378 case _IOC_READ:
379 case _IOC_WRITE:
380 case (_IOC_WRITE | _IOC_READ):
381 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
382 parg = sbuf;
383 } else {
384 /* too big to allocate from stack */
385 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
386 if (NULL == mbuf)
387 return -ENOMEM;
388 parg = mbuf;
389 }
390
391 err = -EFAULT;
392 if (_IOC_DIR(cmd) & _IOC_WRITE)
393 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
394 goto out;
395 break;
396 }
397 if (is_ext_ctrl) {
398 struct v4l2_ext_controls *p = parg;
399
400 /* In case of an error, tell the caller that it wasn't
401 a specific control that caused it. */
402 p->error_idx = p->count;
403 user_ptr = (void __user *)p->controls;
404 if (p->count) {
405 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
406 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
407 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
408 err = -ENOMEM;
409 if (NULL == mbuf)
410 goto out_ext_ctrl;
411 err = -EFAULT;
412 if (copy_from_user(mbuf, user_ptr, ctrls_size))
413 goto out_ext_ctrl;
414 p->controls = mbuf;
415 }
416 }
417
418 /* call driver */
419 err = func(file, cmd, parg);
420 if (err == -ENOIOCTLCMD)
421 err = -EINVAL;
422 if (is_ext_ctrl) {
423 struct v4l2_ext_controls *p = parg;
424
425 p->controls = (void *)user_ptr;
426 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
427 err = -EFAULT;
428 goto out_ext_ctrl;
429 }
430 if (err < 0)
431 goto out;
432
433 out_ext_ctrl:
434 /* Copy results into user buffer */
435 switch (_IOC_DIR(cmd)) {
436 case _IOC_READ:
437 case (_IOC_WRITE | _IOC_READ):
438 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
439 err = -EFAULT;
440 break;
441 }
442
443 out:
444 kfree(mbuf);
445 return err;
446 }
447 EXPORT_SYMBOL(video_usercopy);
448
449 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
450 struct v4l2_buffer *p)
451 {
452 struct v4l2_timecode *tc = &p->timecode;
453
454 dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
455 "bytesused=%d, flags=0x%08d, "
456 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
457 p->timestamp.tv_sec / 3600,
458 (int)(p->timestamp.tv_sec / 60) % 60,
459 (int)(p->timestamp.tv_sec % 60),
460 (long)p->timestamp.tv_usec,
461 p->index,
462 prt_names(p->type, v4l2_type_names),
463 p->bytesused, p->flags,
464 p->field, p->sequence,
465 prt_names(p->memory, v4l2_memory_names),
466 p->m.userptr, p->length);
467 dbgarg2("timecode=%02d:%02d:%02d type=%d, "
468 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
469 tc->hours, tc->minutes, tc->seconds,
470 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
471 }
472
473 static inline void dbgrect(struct video_device *vfd, char *s,
474 struct v4l2_rect *r)
475 {
476 dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
477 r->width, r->height);
478 };
479
480 static inline void v4l_print_pix_fmt(struct video_device *vfd,
481 struct v4l2_pix_format *fmt)
482 {
483 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
484 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
485 fmt->width, fmt->height,
486 (fmt->pixelformat & 0xff),
487 (fmt->pixelformat >> 8) & 0xff,
488 (fmt->pixelformat >> 16) & 0xff,
489 (fmt->pixelformat >> 24) & 0xff,
490 prt_names(fmt->field, v4l2_field_names),
491 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
492 };
493
494 static inline void v4l_print_ext_ctrls(unsigned int cmd,
495 struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
496 {
497 __u32 i;
498
499 if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
500 return;
501 dbgarg(cmd, "");
502 printk(KERN_CONT "class=0x%x", c->ctrl_class);
503 for (i = 0; i < c->count; i++) {
504 if (show_vals)
505 printk(KERN_CONT " id/val=0x%x/0x%x",
506 c->controls[i].id, c->controls[i].value);
507 else
508 printk(KERN_CONT " id=0x%x", c->controls[i].id);
509 }
510 printk(KERN_CONT "\n");
511 };
512
513 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
514 {
515 __u32 i;
516
517 /* zero the reserved fields */
518 c->reserved[0] = c->reserved[1] = 0;
519 for (i = 0; i < c->count; i++) {
520 c->controls[i].reserved2[0] = 0;
521 c->controls[i].reserved2[1] = 0;
522 }
523 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
524 when using extended controls.
525 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
526 is it allowed for backwards compatibility.
527 */
528 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
529 return 0;
530 /* Check that all controls are from the same control class. */
531 for (i = 0; i < c->count; i++) {
532 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
533 c->error_idx = i;
534 return 0;
535 }
536 }
537 return 1;
538 }
539
540 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
541 {
542 if (ops == NULL)
543 return -EINVAL;
544
545 switch (type) {
546 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
547 if (ops->vidioc_try_fmt_vid_cap)
548 return 0;
549 break;
550 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
551 if (ops->vidioc_try_fmt_vid_overlay)
552 return 0;
553 break;
554 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
555 if (ops->vidioc_try_fmt_vid_out)
556 return 0;
557 break;
558 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
559 if (ops->vidioc_try_fmt_vid_out_overlay)
560 return 0;
561 break;
562 case V4L2_BUF_TYPE_VBI_CAPTURE:
563 if (ops->vidioc_try_fmt_vbi_cap)
564 return 0;
565 break;
566 case V4L2_BUF_TYPE_VBI_OUTPUT:
567 if (ops->vidioc_try_fmt_vbi_out)
568 return 0;
569 break;
570 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
571 if (ops->vidioc_try_fmt_sliced_vbi_cap)
572 return 0;
573 break;
574 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
575 if (ops->vidioc_try_fmt_sliced_vbi_out)
576 return 0;
577 break;
578 case V4L2_BUF_TYPE_PRIVATE:
579 if (ops->vidioc_try_fmt_type_private)
580 return 0;
581 break;
582 }
583 return -EINVAL;
584 }
585
586 static long __video_do_ioctl(struct file *file,
587 unsigned int cmd, void *arg)
588 {
589 struct video_device *vfd = video_devdata(file);
590 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
591 void *fh = file->private_data;
592 long ret = -EINVAL;
593
594 if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
595 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
596 v4l_print_ioctl(vfd->name, cmd);
597 printk(KERN_CONT "\n");
598 }
599
600 if (ops == NULL) {
601 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
602 vfd->name);
603 return -EINVAL;
604 }
605
606 #ifdef CONFIG_VIDEO_V4L1_COMPAT
607 /***********************************************************
608 Handles calls to the obsoleted V4L1 API
609 Due to the nature of VIDIOCGMBUF, each driver that supports
610 V4L1 should implement its own handler for this ioctl.
611 ***********************************************************/
612
613 /* --- streaming capture ------------------------------------- */
614 if (cmd == VIDIOCGMBUF) {
615 struct video_mbuf *p = arg;
616
617 if (!ops->vidiocgmbuf)
618 return ret;
619 ret = ops->vidiocgmbuf(file, fh, p);
620 if (!ret)
621 dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
622 p->size, p->frames,
623 (unsigned long)p->offsets);
624 return ret;
625 }
626
627 /********************************************************
628 All other V4L1 calls are handled by v4l1_compat module.
629 Those calls will be translated into V4L2 calls, and
630 __video_do_ioctl will be called again, with one or more
631 V4L2 ioctls.
632 ********************************************************/
633 if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
634 return v4l_compat_translate_ioctl(file, cmd, arg,
635 __video_do_ioctl);
636 #endif
637
638 switch (cmd) {
639 /* --- capabilities ------------------------------------------ */
640 case VIDIOC_QUERYCAP:
641 {
642 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
643
644 if (!ops->vidioc_querycap)
645 break;
646
647 ret = ops->vidioc_querycap(file, fh, cap);
648 if (!ret)
649 dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
650 "version=0x%08x, "
651 "capabilities=0x%08x\n",
652 cap->driver, cap->card, cap->bus_info,
653 cap->version,
654 cap->capabilities);
655 break;
656 }
657
658 /* --- priority ------------------------------------------ */
659 case VIDIOC_G_PRIORITY:
660 {
661 enum v4l2_priority *p = arg;
662
663 if (!ops->vidioc_g_priority)
664 break;
665 ret = ops->vidioc_g_priority(file, fh, p);
666 if (!ret)
667 dbgarg(cmd, "priority is %d\n", *p);
668 break;
669 }
670 case VIDIOC_S_PRIORITY:
671 {
672 enum v4l2_priority *p = arg;
673
674 if (!ops->vidioc_s_priority)
675 break;
676 dbgarg(cmd, "setting priority to %d\n", *p);
677 ret = ops->vidioc_s_priority(file, fh, *p);
678 break;
679 }
680
681 /* --- capture ioctls ---------------------------------------- */
682 case VIDIOC_ENUM_FMT:
683 {
684 struct v4l2_fmtdesc *f = arg;
685
686 switch (f->type) {
687 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
688 if (ops->vidioc_enum_fmt_vid_cap)
689 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
690 break;
691 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
692 if (ops->vidioc_enum_fmt_vid_overlay)
693 ret = ops->vidioc_enum_fmt_vid_overlay(file,
694 fh, f);
695 break;
696 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
697 if (ops->vidioc_enum_fmt_vid_out)
698 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
699 break;
700 case V4L2_BUF_TYPE_PRIVATE:
701 if (ops->vidioc_enum_fmt_type_private)
702 ret = ops->vidioc_enum_fmt_type_private(file,
703 fh, f);
704 break;
705 default:
706 break;
707 }
708 if (!ret)
709 dbgarg(cmd, "index=%d, type=%d, flags=%d, "
710 "pixelformat=%c%c%c%c, description='%s'\n",
711 f->index, f->type, f->flags,
712 (f->pixelformat & 0xff),
713 (f->pixelformat >> 8) & 0xff,
714 (f->pixelformat >> 16) & 0xff,
715 (f->pixelformat >> 24) & 0xff,
716 f->description);
717 break;
718 }
719 case VIDIOC_G_FMT:
720 {
721 struct v4l2_format *f = (struct v4l2_format *)arg;
722
723 /* FIXME: Should be one dump per type */
724 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
725
726 switch (f->type) {
727 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
728 if (ops->vidioc_g_fmt_vid_cap)
729 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
730 if (!ret)
731 v4l_print_pix_fmt(vfd, &f->fmt.pix);
732 break;
733 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
734 if (ops->vidioc_g_fmt_vid_overlay)
735 ret = ops->vidioc_g_fmt_vid_overlay(file,
736 fh, f);
737 break;
738 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
739 if (ops->vidioc_g_fmt_vid_out)
740 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
741 if (!ret)
742 v4l_print_pix_fmt(vfd, &f->fmt.pix);
743 break;
744 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
745 if (ops->vidioc_g_fmt_vid_out_overlay)
746 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
747 fh, f);
748 break;
749 case V4L2_BUF_TYPE_VBI_CAPTURE:
750 if (ops->vidioc_g_fmt_vbi_cap)
751 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
752 break;
753 case V4L2_BUF_TYPE_VBI_OUTPUT:
754 if (ops->vidioc_g_fmt_vbi_out)
755 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
756 break;
757 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
758 if (ops->vidioc_g_fmt_sliced_vbi_cap)
759 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
760 fh, f);
761 break;
762 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
763 if (ops->vidioc_g_fmt_sliced_vbi_out)
764 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
765 fh, f);
766 break;
767 case V4L2_BUF_TYPE_PRIVATE:
768 if (ops->vidioc_g_fmt_type_private)
769 ret = ops->vidioc_g_fmt_type_private(file,
770 fh, f);
771 break;
772 }
773
774 break;
775 }
776 case VIDIOC_S_FMT:
777 {
778 struct v4l2_format *f = (struct v4l2_format *)arg;
779
780 /* FIXME: Should be one dump per type */
781 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
782
783 switch (f->type) {
784 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
785 v4l_print_pix_fmt(vfd, &f->fmt.pix);
786 if (ops->vidioc_s_fmt_vid_cap)
787 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
788 break;
789 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
790 if (ops->vidioc_s_fmt_vid_overlay)
791 ret = ops->vidioc_s_fmt_vid_overlay(file,
792 fh, f);
793 break;
794 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
795 v4l_print_pix_fmt(vfd, &f->fmt.pix);
796 if (ops->vidioc_s_fmt_vid_out)
797 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
798 break;
799 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
800 if (ops->vidioc_s_fmt_vid_out_overlay)
801 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
802 fh, f);
803 break;
804 case V4L2_BUF_TYPE_VBI_CAPTURE:
805 if (ops->vidioc_s_fmt_vbi_cap)
806 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
807 break;
808 case V4L2_BUF_TYPE_VBI_OUTPUT:
809 if (ops->vidioc_s_fmt_vbi_out)
810 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
811 break;
812 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
813 if (ops->vidioc_s_fmt_sliced_vbi_cap)
814 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
815 fh, f);
816 break;
817 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
818 if (ops->vidioc_s_fmt_sliced_vbi_out)
819 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
820 fh, f);
821 break;
822 case V4L2_BUF_TYPE_PRIVATE:
823 if (ops->vidioc_s_fmt_type_private)
824 ret = ops->vidioc_s_fmt_type_private(file,
825 fh, f);
826 break;
827 }
828 break;
829 }
830 case VIDIOC_TRY_FMT:
831 {
832 struct v4l2_format *f = (struct v4l2_format *)arg;
833
834 /* FIXME: Should be one dump per type */
835 dbgarg(cmd, "type=%s\n", prt_names(f->type,
836 v4l2_type_names));
837 switch (f->type) {
838 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
839 if (ops->vidioc_try_fmt_vid_cap)
840 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
841 if (!ret)
842 v4l_print_pix_fmt(vfd, &f->fmt.pix);
843 break;
844 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
845 if (ops->vidioc_try_fmt_vid_overlay)
846 ret = ops->vidioc_try_fmt_vid_overlay(file,
847 fh, f);
848 break;
849 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
850 if (ops->vidioc_try_fmt_vid_out)
851 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
852 if (!ret)
853 v4l_print_pix_fmt(vfd, &f->fmt.pix);
854 break;
855 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
856 if (ops->vidioc_try_fmt_vid_out_overlay)
857 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
858 fh, f);
859 break;
860 case V4L2_BUF_TYPE_VBI_CAPTURE:
861 if (ops->vidioc_try_fmt_vbi_cap)
862 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
863 break;
864 case V4L2_BUF_TYPE_VBI_OUTPUT:
865 if (ops->vidioc_try_fmt_vbi_out)
866 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
867 break;
868 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
869 if (ops->vidioc_try_fmt_sliced_vbi_cap)
870 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
871 fh, f);
872 break;
873 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
874 if (ops->vidioc_try_fmt_sliced_vbi_out)
875 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
876 fh, f);
877 break;
878 case V4L2_BUF_TYPE_PRIVATE:
879 if (ops->vidioc_try_fmt_type_private)
880 ret = ops->vidioc_try_fmt_type_private(file,
881 fh, f);
882 break;
883 }
884
885 break;
886 }
887 /* FIXME: Those buf reqs could be handled here,
888 with some changes on videobuf to allow its header to be included at
889 videodev2.h or being merged at videodev2.
890 */
891 case VIDIOC_REQBUFS:
892 {
893 struct v4l2_requestbuffers *p = arg;
894
895 if (!ops->vidioc_reqbufs)
896 break;
897 ret = check_fmt(ops, p->type);
898 if (ret)
899 break;
900
901 ret = ops->vidioc_reqbufs(file, fh, p);
902 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
903 p->count,
904 prt_names(p->type, v4l2_type_names),
905 prt_names(p->memory, v4l2_memory_names));
906 break;
907 }
908 case VIDIOC_QUERYBUF:
909 {
910 struct v4l2_buffer *p = arg;
911
912 if (!ops->vidioc_querybuf)
913 break;
914 ret = check_fmt(ops, p->type);
915 if (ret)
916 break;
917
918 ret = ops->vidioc_querybuf(file, fh, p);
919 if (!ret)
920 dbgbuf(cmd, vfd, p);
921 break;
922 }
923 case VIDIOC_QBUF:
924 {
925 struct v4l2_buffer *p = arg;
926
927 if (!ops->vidioc_qbuf)
928 break;
929 ret = check_fmt(ops, p->type);
930 if (ret)
931 break;
932
933 ret = ops->vidioc_qbuf(file, fh, p);
934 if (!ret)
935 dbgbuf(cmd, vfd, p);
936 break;
937 }
938 case VIDIOC_DQBUF:
939 {
940 struct v4l2_buffer *p = arg;
941
942 if (!ops->vidioc_dqbuf)
943 break;
944 ret = check_fmt(ops, p->type);
945 if (ret)
946 break;
947
948 ret = ops->vidioc_dqbuf(file, fh, p);
949 if (!ret)
950 dbgbuf(cmd, vfd, p);
951 break;
952 }
953 case VIDIOC_OVERLAY:
954 {
955 int *i = arg;
956
957 if (!ops->vidioc_overlay)
958 break;
959 dbgarg(cmd, "value=%d\n", *i);
960 ret = ops->vidioc_overlay(file, fh, *i);
961 break;
962 }
963 case VIDIOC_G_FBUF:
964 {
965 struct v4l2_framebuffer *p = arg;
966
967 if (!ops->vidioc_g_fbuf)
968 break;
969 ret = ops->vidioc_g_fbuf(file, fh, arg);
970 if (!ret) {
971 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
972 p->capability, p->flags,
973 (unsigned long)p->base);
974 v4l_print_pix_fmt(vfd, &p->fmt);
975 }
976 break;
977 }
978 case VIDIOC_S_FBUF:
979 {
980 struct v4l2_framebuffer *p = arg;
981
982 if (!ops->vidioc_s_fbuf)
983 break;
984 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
985 p->capability, p->flags, (unsigned long)p->base);
986 v4l_print_pix_fmt(vfd, &p->fmt);
987 ret = ops->vidioc_s_fbuf(file, fh, arg);
988 break;
989 }
990 case VIDIOC_STREAMON:
991 {
992 enum v4l2_buf_type i = *(int *)arg;
993
994 if (!ops->vidioc_streamon)
995 break;
996 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
997 ret = ops->vidioc_streamon(file, fh, i);
998 break;
999 }
1000 case VIDIOC_STREAMOFF:
1001 {
1002 enum v4l2_buf_type i = *(int *)arg;
1003
1004 if (!ops->vidioc_streamoff)
1005 break;
1006 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1007 ret = ops->vidioc_streamoff(file, fh, i);
1008 break;
1009 }
1010 /* ---------- tv norms ---------- */
1011 case VIDIOC_ENUMSTD:
1012 {
1013 struct v4l2_standard *p = arg;
1014 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1015 unsigned int index = p->index, i, j = 0;
1016 const char *descr = "";
1017
1018 /* Return norm array in a canonical way */
1019 for (i = 0; i <= index && id; i++) {
1020 /* last std value in the standards array is 0, so this
1021 while always ends there since (id & 0) == 0. */
1022 while ((id & standards[j].std) != standards[j].std)
1023 j++;
1024 curr_id = standards[j].std;
1025 descr = standards[j].descr;
1026 j++;
1027 if (curr_id == 0)
1028 break;
1029 if (curr_id != V4L2_STD_PAL &&
1030 curr_id != V4L2_STD_SECAM &&
1031 curr_id != V4L2_STD_NTSC)
1032 id &= ~curr_id;
1033 }
1034 if (i <= index)
1035 return -EINVAL;
1036
1037 v4l2_video_std_construct(p, curr_id, descr);
1038
1039 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1040 "framelines=%d\n", p->index,
1041 (unsigned long long)p->id, p->name,
1042 p->frameperiod.numerator,
1043 p->frameperiod.denominator,
1044 p->framelines);
1045
1046 ret = 0;
1047 break;
1048 }
1049 case VIDIOC_G_STD:
1050 {
1051 v4l2_std_id *id = arg;
1052
1053 ret = 0;
1054 /* Calls the specific handler */
1055 if (ops->vidioc_g_std)
1056 ret = ops->vidioc_g_std(file, fh, id);
1057 else
1058 *id = vfd->current_norm;
1059
1060 if (!ret)
1061 dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1062 break;
1063 }
1064 case VIDIOC_S_STD:
1065 {
1066 v4l2_std_id *id = arg, norm;
1067
1068 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1069
1070 norm = (*id) & vfd->tvnorms;
1071 if (vfd->tvnorms && !norm) /* Check if std is supported */
1072 break;
1073
1074 /* Calls the specific handler */
1075 if (ops->vidioc_s_std)
1076 ret = ops->vidioc_s_std(file, fh, &norm);
1077 else
1078 ret = -EINVAL;
1079
1080 /* Updates standard information */
1081 if (ret >= 0)
1082 vfd->current_norm = norm;
1083 break;
1084 }
1085 case VIDIOC_QUERYSTD:
1086 {
1087 v4l2_std_id *p = arg;
1088
1089 if (!ops->vidioc_querystd)
1090 break;
1091 ret = ops->vidioc_querystd(file, fh, arg);
1092 if (!ret)
1093 dbgarg(cmd, "detected std=%08Lx\n",
1094 (unsigned long long)*p);
1095 break;
1096 }
1097 /* ------ input switching ---------- */
1098 /* FIXME: Inputs can be handled inside videodev2 */
1099 case VIDIOC_ENUMINPUT:
1100 {
1101 struct v4l2_input *p = arg;
1102
1103 if (!ops->vidioc_enum_input)
1104 break;
1105
1106 ret = ops->vidioc_enum_input(file, fh, p);
1107 if (!ret)
1108 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1109 "audioset=%d, "
1110 "tuner=%d, std=%08Lx, status=%d\n",
1111 p->index, p->name, p->type, p->audioset,
1112 p->tuner,
1113 (unsigned long long)p->std,
1114 p->status);
1115 break;
1116 }
1117 case VIDIOC_G_INPUT:
1118 {
1119 unsigned int *i = arg;
1120
1121 if (!ops->vidioc_g_input)
1122 break;
1123 ret = ops->vidioc_g_input(file, fh, i);
1124 if (!ret)
1125 dbgarg(cmd, "value=%d\n", *i);
1126 break;
1127 }
1128 case VIDIOC_S_INPUT:
1129 {
1130 unsigned int *i = arg;
1131
1132 if (!ops->vidioc_s_input)
1133 break;
1134 dbgarg(cmd, "value=%d\n", *i);
1135 ret = ops->vidioc_s_input(file, fh, *i);
1136 break;
1137 }
1138
1139 /* ------ output switching ---------- */
1140 case VIDIOC_ENUMOUTPUT:
1141 {
1142 struct v4l2_output *p = arg;
1143
1144 if (!ops->vidioc_enum_output)
1145 break;
1146
1147 ret = ops->vidioc_enum_output(file, fh, p);
1148 if (!ret)
1149 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1150 "audioset=0x%x, "
1151 "modulator=%d, std=0x%08Lx\n",
1152 p->index, p->name, p->type, p->audioset,
1153 p->modulator, (unsigned long long)p->std);
1154 break;
1155 }
1156 case VIDIOC_G_OUTPUT:
1157 {
1158 unsigned int *i = arg;
1159
1160 if (!ops->vidioc_g_output)
1161 break;
1162 ret = ops->vidioc_g_output(file, fh, i);
1163 if (!ret)
1164 dbgarg(cmd, "value=%d\n", *i);
1165 break;
1166 }
1167 case VIDIOC_S_OUTPUT:
1168 {
1169 unsigned int *i = arg;
1170
1171 if (!ops->vidioc_s_output)
1172 break;
1173 dbgarg(cmd, "value=%d\n", *i);
1174 ret = ops->vidioc_s_output(file, fh, *i);
1175 break;
1176 }
1177
1178 /* --- controls ---------------------------------------------- */
1179 case VIDIOC_QUERYCTRL:
1180 {
1181 struct v4l2_queryctrl *p = arg;
1182
1183 if (!ops->vidioc_queryctrl)
1184 break;
1185 ret = ops->vidioc_queryctrl(file, fh, p);
1186 if (!ret)
1187 dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1188 "step=%d, default=%d, flags=0x%08x\n",
1189 p->id, p->type, p->name,
1190 p->minimum, p->maximum,
1191 p->step, p->default_value, p->flags);
1192 else
1193 dbgarg(cmd, "id=0x%x\n", p->id);
1194 break;
1195 }
1196 case VIDIOC_G_CTRL:
1197 {
1198 struct v4l2_control *p = arg;
1199
1200 if (ops->vidioc_g_ctrl)
1201 ret = ops->vidioc_g_ctrl(file, fh, p);
1202 else if (ops->vidioc_g_ext_ctrls) {
1203 struct v4l2_ext_controls ctrls;
1204 struct v4l2_ext_control ctrl;
1205
1206 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1207 ctrls.count = 1;
1208 ctrls.controls = &ctrl;
1209 ctrl.id = p->id;
1210 ctrl.value = p->value;
1211 if (check_ext_ctrls(&ctrls, 1)) {
1212 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1213 if (ret == 0)
1214 p->value = ctrl.value;
1215 }
1216 } else
1217 break;
1218 if (!ret)
1219 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1220 else
1221 dbgarg(cmd, "id=0x%x\n", p->id);
1222 break;
1223 }
1224 case VIDIOC_S_CTRL:
1225 {
1226 struct v4l2_control *p = arg;
1227 struct v4l2_ext_controls ctrls;
1228 struct v4l2_ext_control ctrl;
1229
1230 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1231 break;
1232
1233 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1234
1235 if (ops->vidioc_s_ctrl) {
1236 ret = ops->vidioc_s_ctrl(file, fh, p);
1237 break;
1238 }
1239 if (!ops->vidioc_s_ext_ctrls)
1240 break;
1241
1242 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1243 ctrls.count = 1;
1244 ctrls.controls = &ctrl;
1245 ctrl.id = p->id;
1246 ctrl.value = p->value;
1247 if (check_ext_ctrls(&ctrls, 1))
1248 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1249 break;
1250 }
1251 case VIDIOC_G_EXT_CTRLS:
1252 {
1253 struct v4l2_ext_controls *p = arg;
1254
1255 p->error_idx = p->count;
1256 if (!ops->vidioc_g_ext_ctrls)
1257 break;
1258 if (check_ext_ctrls(p, 0))
1259 ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1260 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1261 break;
1262 }
1263 case VIDIOC_S_EXT_CTRLS:
1264 {
1265 struct v4l2_ext_controls *p = arg;
1266
1267 p->error_idx = p->count;
1268 if (!ops->vidioc_s_ext_ctrls)
1269 break;
1270 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1271 if (check_ext_ctrls(p, 0))
1272 ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1273 break;
1274 }
1275 case VIDIOC_TRY_EXT_CTRLS:
1276 {
1277 struct v4l2_ext_controls *p = arg;
1278
1279 p->error_idx = p->count;
1280 if (!ops->vidioc_try_ext_ctrls)
1281 break;
1282 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1283 if (check_ext_ctrls(p, 0))
1284 ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1285 break;
1286 }
1287 case VIDIOC_QUERYMENU:
1288 {
1289 struct v4l2_querymenu *p = arg;
1290
1291 if (!ops->vidioc_querymenu)
1292 break;
1293 ret = ops->vidioc_querymenu(file, fh, p);
1294 if (!ret)
1295 dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1296 p->id, p->index, p->name);
1297 else
1298 dbgarg(cmd, "id=0x%x, index=%d\n",
1299 p->id, p->index);
1300 break;
1301 }
1302 /* --- audio ---------------------------------------------- */
1303 case VIDIOC_ENUMAUDIO:
1304 {
1305 struct v4l2_audio *p = arg;
1306
1307 if (!ops->vidioc_enumaudio)
1308 break;
1309 ret = ops->vidioc_enumaudio(file, fh, p);
1310 if (!ret)
1311 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1312 "mode=0x%x\n", p->index, p->name,
1313 p->capability, p->mode);
1314 else
1315 dbgarg(cmd, "index=%d\n", p->index);
1316 break;
1317 }
1318 case VIDIOC_G_AUDIO:
1319 {
1320 struct v4l2_audio *p = arg;
1321
1322 if (!ops->vidioc_g_audio)
1323 break;
1324
1325 ret = ops->vidioc_g_audio(file, fh, p);
1326 if (!ret)
1327 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1328 "mode=0x%x\n", p->index,
1329 p->name, p->capability, p->mode);
1330 else
1331 dbgarg(cmd, "index=%d\n", p->index);
1332 break;
1333 }
1334 case VIDIOC_S_AUDIO:
1335 {
1336 struct v4l2_audio *p = arg;
1337
1338 if (!ops->vidioc_s_audio)
1339 break;
1340 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1341 "mode=0x%x\n", p->index, p->name,
1342 p->capability, p->mode);
1343 ret = ops->vidioc_s_audio(file, fh, p);
1344 break;
1345 }
1346 case VIDIOC_ENUMAUDOUT:
1347 {
1348 struct v4l2_audioout *p = arg;
1349
1350 if (!ops->vidioc_enumaudout)
1351 break;
1352 dbgarg(cmd, "Enum for index=%d\n", p->index);
1353 ret = ops->vidioc_enumaudout(file, fh, p);
1354 if (!ret)
1355 dbgarg2("index=%d, name=%s, capability=%d, "
1356 "mode=%d\n", p->index, p->name,
1357 p->capability, p->mode);
1358 break;
1359 }
1360 case VIDIOC_G_AUDOUT:
1361 {
1362 struct v4l2_audioout *p = arg;
1363
1364 if (!ops->vidioc_g_audout)
1365 break;
1366
1367 ret = ops->vidioc_g_audout(file, fh, p);
1368 if (!ret)
1369 dbgarg2("index=%d, name=%s, capability=%d, "
1370 "mode=%d\n", p->index, p->name,
1371 p->capability, p->mode);
1372 break;
1373 }
1374 case VIDIOC_S_AUDOUT:
1375 {
1376 struct v4l2_audioout *p = arg;
1377
1378 if (!ops->vidioc_s_audout)
1379 break;
1380 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1381 "mode=%d\n", p->index, p->name,
1382 p->capability, p->mode);
1383
1384 ret = ops->vidioc_s_audout(file, fh, p);
1385 break;
1386 }
1387 case VIDIOC_G_MODULATOR:
1388 {
1389 struct v4l2_modulator *p = arg;
1390
1391 if (!ops->vidioc_g_modulator)
1392 break;
1393 ret = ops->vidioc_g_modulator(file, fh, p);
1394 if (!ret)
1395 dbgarg(cmd, "index=%d, name=%s, "
1396 "capability=%d, rangelow=%d,"
1397 " rangehigh=%d, txsubchans=%d\n",
1398 p->index, p->name, p->capability,
1399 p->rangelow, p->rangehigh,
1400 p->txsubchans);
1401 break;
1402 }
1403 case VIDIOC_S_MODULATOR:
1404 {
1405 struct v4l2_modulator *p = arg;
1406
1407 if (!ops->vidioc_s_modulator)
1408 break;
1409 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1410 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1411 p->index, p->name, p->capability, p->rangelow,
1412 p->rangehigh, p->txsubchans);
1413 ret = ops->vidioc_s_modulator(file, fh, p);
1414 break;
1415 }
1416 case VIDIOC_G_CROP:
1417 {
1418 struct v4l2_crop *p = arg;
1419
1420 if (!ops->vidioc_g_crop)
1421 break;
1422
1423 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1424 ret = ops->vidioc_g_crop(file, fh, p);
1425 if (!ret)
1426 dbgrect(vfd, "", &p->c);
1427 break;
1428 }
1429 case VIDIOC_S_CROP:
1430 {
1431 struct v4l2_crop *p = arg;
1432
1433 if (!ops->vidioc_s_crop)
1434 break;
1435 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1436 dbgrect(vfd, "", &p->c);
1437 ret = ops->vidioc_s_crop(file, fh, p);
1438 break;
1439 }
1440 case VIDIOC_CROPCAP:
1441 {
1442 struct v4l2_cropcap *p = arg;
1443
1444 /*FIXME: Should also show v4l2_fract pixelaspect */
1445 if (!ops->vidioc_cropcap)
1446 break;
1447
1448 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1449 ret = ops->vidioc_cropcap(file, fh, p);
1450 if (!ret) {
1451 dbgrect(vfd, "bounds ", &p->bounds);
1452 dbgrect(vfd, "defrect ", &p->defrect);
1453 }
1454 break;
1455 }
1456 case VIDIOC_G_JPEGCOMP:
1457 {
1458 struct v4l2_jpegcompression *p = arg;
1459
1460 if (!ops->vidioc_g_jpegcomp)
1461 break;
1462
1463 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1464 if (!ret)
1465 dbgarg(cmd, "quality=%d, APPn=%d, "
1466 "APP_len=%d, COM_len=%d, "
1467 "jpeg_markers=%d\n",
1468 p->quality, p->APPn, p->APP_len,
1469 p->COM_len, p->jpeg_markers);
1470 break;
1471 }
1472 case VIDIOC_S_JPEGCOMP:
1473 {
1474 struct v4l2_jpegcompression *p = arg;
1475
1476 if (!ops->vidioc_g_jpegcomp)
1477 break;
1478 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1479 "COM_len=%d, jpeg_markers=%d\n",
1480 p->quality, p->APPn, p->APP_len,
1481 p->COM_len, p->jpeg_markers);
1482 ret = ops->vidioc_s_jpegcomp(file, fh, p);
1483 break;
1484 }
1485 case VIDIOC_G_ENC_INDEX:
1486 {
1487 struct v4l2_enc_idx *p = arg;
1488
1489 if (!ops->vidioc_g_enc_index)
1490 break;
1491 ret = ops->vidioc_g_enc_index(file, fh, p);
1492 if (!ret)
1493 dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1494 p->entries, p->entries_cap);
1495 break;
1496 }
1497 case VIDIOC_ENCODER_CMD:
1498 {
1499 struct v4l2_encoder_cmd *p = arg;
1500
1501 if (!ops->vidioc_encoder_cmd)
1502 break;
1503 ret = ops->vidioc_encoder_cmd(file, fh, p);
1504 if (!ret)
1505 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1506 break;
1507 }
1508 case VIDIOC_TRY_ENCODER_CMD:
1509 {
1510 struct v4l2_encoder_cmd *p = arg;
1511
1512 if (!ops->vidioc_try_encoder_cmd)
1513 break;
1514 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1515 if (!ret)
1516 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1517 break;
1518 }
1519 case VIDIOC_G_PARM:
1520 {
1521 struct v4l2_streamparm *p = arg;
1522
1523 if (ops->vidioc_g_parm) {
1524 ret = check_fmt(ops, p->type);
1525 if (ret)
1526 break;
1527 ret = ops->vidioc_g_parm(file, fh, p);
1528 } else {
1529 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1530 return -EINVAL;
1531
1532 v4l2_video_std_frame_period(vfd->current_norm,
1533 &p->parm.capture.timeperframe);
1534 ret = 0;
1535 }
1536
1537 dbgarg(cmd, "type=%d\n", p->type);
1538 break;
1539 }
1540 case VIDIOC_S_PARM:
1541 {
1542 struct v4l2_streamparm *p = arg;
1543
1544 if (!ops->vidioc_s_parm)
1545 break;
1546 ret = check_fmt(ops, p->type);
1547 if (ret)
1548 break;
1549
1550 dbgarg(cmd, "type=%d\n", p->type);
1551 ret = ops->vidioc_s_parm(file, fh, p);
1552 break;
1553 }
1554 case VIDIOC_G_TUNER:
1555 {
1556 struct v4l2_tuner *p = arg;
1557
1558 if (!ops->vidioc_g_tuner)
1559 break;
1560
1561 ret = ops->vidioc_g_tuner(file, fh, p);
1562 if (!ret)
1563 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1564 "capability=0x%x, rangelow=%d, "
1565 "rangehigh=%d, signal=%d, afc=%d, "
1566 "rxsubchans=0x%x, audmode=%d\n",
1567 p->index, p->name, p->type,
1568 p->capability, p->rangelow,
1569 p->rangehigh, p->signal, p->afc,
1570 p->rxsubchans, p->audmode);
1571 break;
1572 }
1573 case VIDIOC_S_TUNER:
1574 {
1575 struct v4l2_tuner *p = arg;
1576
1577 if (!ops->vidioc_s_tuner)
1578 break;
1579 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1580 "capability=0x%x, rangelow=%d, "
1581 "rangehigh=%d, signal=%d, afc=%d, "
1582 "rxsubchans=0x%x, audmode=%d\n",
1583 p->index, p->name, p->type,
1584 p->capability, p->rangelow,
1585 p->rangehigh, p->signal, p->afc,
1586 p->rxsubchans, p->audmode);
1587 ret = ops->vidioc_s_tuner(file, fh, p);
1588 break;
1589 }
1590 case VIDIOC_G_FREQUENCY:
1591 {
1592 struct v4l2_frequency *p = arg;
1593
1594 if (!ops->vidioc_g_frequency)
1595 break;
1596
1597 ret = ops->vidioc_g_frequency(file, fh, p);
1598 if (!ret)
1599 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1600 p->tuner, p->type, p->frequency);
1601 break;
1602 }
1603 case VIDIOC_S_FREQUENCY:
1604 {
1605 struct v4l2_frequency *p = arg;
1606
1607 if (!ops->vidioc_s_frequency)
1608 break;
1609 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1610 p->tuner, p->type, p->frequency);
1611 ret = ops->vidioc_s_frequency(file, fh, p);
1612 break;
1613 }
1614 case VIDIOC_G_SLICED_VBI_CAP:
1615 {
1616 struct v4l2_sliced_vbi_cap *p = arg;
1617
1618 if (!ops->vidioc_g_sliced_vbi_cap)
1619 break;
1620
1621 /* Clear up to type, everything after type is zerod already */
1622 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1623
1624 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1625 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1626 if (!ret)
1627 dbgarg2("service_set=%d\n", p->service_set);
1628 break;
1629 }
1630 case VIDIOC_LOG_STATUS:
1631 {
1632 if (!ops->vidioc_log_status)
1633 break;
1634 ret = ops->vidioc_log_status(file, fh);
1635 break;
1636 }
1637 #ifdef CONFIG_VIDEO_ADV_DEBUG
1638 case VIDIOC_DBG_G_REGISTER:
1639 {
1640 struct v4l2_dbg_register *p = arg;
1641
1642 if (!capable(CAP_SYS_ADMIN))
1643 ret = -EPERM;
1644 else if (ops->vidioc_g_register)
1645 ret = ops->vidioc_g_register(file, fh, p);
1646 break;
1647 }
1648 case VIDIOC_DBG_S_REGISTER:
1649 {
1650 struct v4l2_dbg_register *p = arg;
1651
1652 if (!capable(CAP_SYS_ADMIN))
1653 ret = -EPERM;
1654 else if (ops->vidioc_s_register)
1655 ret = ops->vidioc_s_register(file, fh, p);
1656 break;
1657 }
1658 #endif
1659 case VIDIOC_DBG_G_CHIP_IDENT:
1660 {
1661 struct v4l2_dbg_chip_ident *p = arg;
1662
1663 if (!ops->vidioc_g_chip_ident)
1664 break;
1665 p->ident = V4L2_IDENT_NONE;
1666 p->revision = 0;
1667 ret = ops->vidioc_g_chip_ident(file, fh, p);
1668 if (!ret)
1669 dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1670 break;
1671 }
1672 case VIDIOC_S_HW_FREQ_SEEK:
1673 {
1674 struct v4l2_hw_freq_seek *p = arg;
1675
1676 if (!ops->vidioc_s_hw_freq_seek)
1677 break;
1678 dbgarg(cmd,
1679 "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1680 p->tuner, p->type, p->seek_upward, p->wrap_around);
1681 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1682 break;
1683 }
1684 case VIDIOC_ENUM_FRAMESIZES:
1685 {
1686 struct v4l2_frmsizeenum *p = arg;
1687
1688 if (!ops->vidioc_enum_framesizes)
1689 break;
1690
1691 ret = ops->vidioc_enum_framesizes(file, fh, p);
1692 dbgarg(cmd,
1693 "index=%d, pixelformat=%d, type=%d ",
1694 p->index, p->pixel_format, p->type);
1695 switch (p->type) {
1696 case V4L2_FRMSIZE_TYPE_DISCRETE:
1697 dbgarg2("width = %d, height=%d\n",
1698 p->discrete.width, p->discrete.height);
1699 break;
1700 case V4L2_FRMSIZE_TYPE_STEPWISE:
1701 dbgarg2("min %dx%d, max %dx%d, step %dx%d\n",
1702 p->stepwise.min_width, p->stepwise.min_height,
1703 p->stepwise.step_width, p->stepwise.step_height,
1704 p->stepwise.max_width, p->stepwise.max_height);
1705 break;
1706 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1707 dbgarg2("continuous\n");
1708 break;
1709 default:
1710 dbgarg2("- Unknown type!\n");
1711 }
1712
1713 break;
1714 }
1715 case VIDIOC_ENUM_FRAMEINTERVALS:
1716 {
1717 struct v4l2_frmivalenum *p = arg;
1718
1719 if (!ops->vidioc_enum_frameintervals)
1720 break;
1721
1722 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1723 dbgarg(cmd,
1724 "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1725 p->index, p->pixel_format,
1726 p->width, p->height, p->type);
1727 switch (p->type) {
1728 case V4L2_FRMIVAL_TYPE_DISCRETE:
1729 dbgarg2("fps=%d/%d\n",
1730 p->discrete.numerator,
1731 p->discrete.denominator);
1732 break;
1733 case V4L2_FRMIVAL_TYPE_STEPWISE:
1734 dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1735 p->stepwise.min.numerator,
1736 p->stepwise.min.denominator,
1737 p->stepwise.max.numerator,
1738 p->stepwise.max.denominator,
1739 p->stepwise.step.numerator,
1740 p->stepwise.step.denominator);
1741 break;
1742 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1743 dbgarg2("continuous\n");
1744 break;
1745 default:
1746 dbgarg2("- Unknown type!\n");
1747 }
1748 break;
1749 }
1750
1751 default:
1752 {
1753 if (!ops->vidioc_default)
1754 break;
1755 ret = ops->vidioc_default(file, fh, cmd, arg);
1756 break;
1757 }
1758 } /* switch */
1759
1760 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1761 if (ret < 0) {
1762 v4l_print_ioctl(vfd->name, cmd);
1763 printk(KERN_CONT " error %ld\n", ret);
1764 }
1765 }
1766
1767 return ret;
1768 }
1769
1770 /* In some cases, only a few fields are used as input, i.e. when the app sets
1771 * "index" and then the driver fills in the rest of the structure for the thing
1772 * with that index. We only need to copy up the first non-input field. */
1773 static unsigned long cmd_input_size(unsigned int cmd)
1774 {
1775 /* Size of structure up to and including 'field' */
1776 #define CMDINSIZE(cmd, type, field) \
1777 case VIDIOC_##cmd: \
1778 return offsetof(struct v4l2_##type, field) + \
1779 sizeof(((struct v4l2_##type *)0)->field);
1780
1781 switch (cmd) {
1782 CMDINSIZE(ENUM_FMT, fmtdesc, type);
1783 CMDINSIZE(G_FMT, format, type);
1784 CMDINSIZE(QUERYBUF, buffer, type);
1785 CMDINSIZE(G_PARM, streamparm, type);
1786 CMDINSIZE(ENUMSTD, standard, index);
1787 CMDINSIZE(ENUMINPUT, input, index);
1788 CMDINSIZE(G_CTRL, control, id);
1789 CMDINSIZE(G_TUNER, tuner, index);
1790 CMDINSIZE(QUERYCTRL, queryctrl, id);
1791 CMDINSIZE(QUERYMENU, querymenu, index);
1792 CMDINSIZE(ENUMOUTPUT, output, index);
1793 CMDINSIZE(G_MODULATOR, modulator, index);
1794 CMDINSIZE(G_FREQUENCY, frequency, tuner);
1795 CMDINSIZE(CROPCAP, cropcap, type);
1796 CMDINSIZE(G_CROP, crop, type);
1797 CMDINSIZE(ENUMAUDIO, audio, index);
1798 CMDINSIZE(ENUMAUDOUT, audioout, index);
1799 CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
1800 CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
1801 CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
1802 CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
1803 CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
1804 default:
1805 return _IOC_SIZE(cmd);
1806 }
1807 }
1808
1809 long video_ioctl2(struct file *file,
1810 unsigned int cmd, unsigned long arg)
1811 {
1812 char sbuf[128];
1813 void *mbuf = NULL;
1814 void *parg = NULL;
1815 long err = -EINVAL;
1816 int is_ext_ctrl;
1817 size_t ctrls_size = 0;
1818 void __user *user_ptr = NULL;
1819
1820 #ifdef __OLD_VIDIOC_
1821 cmd = video_fix_command(cmd);
1822 #endif
1823 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1824 cmd == VIDIOC_TRY_EXT_CTRLS);
1825
1826 /* Copy arguments into temp kernel buffer */
1827 if (_IOC_DIR(cmd) != _IOC_NONE) {
1828 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1829 parg = sbuf;
1830 } else {
1831 /* too big to allocate from stack */
1832 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1833 if (NULL == mbuf)
1834 return -ENOMEM;
1835 parg = mbuf;
1836 }
1837
1838 err = -EFAULT;
1839 if (_IOC_DIR(cmd) & _IOC_WRITE) {
1840 unsigned long n = cmd_input_size(cmd);
1841
1842 if (copy_from_user(parg, (void __user *)arg, n))
1843 goto out;
1844
1845 /* zero out anything we don't copy from userspace */
1846 if (n < _IOC_SIZE(cmd))
1847 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
1848 } else {
1849 /* read-only ioctl */
1850 memset(parg, 0, _IOC_SIZE(cmd));
1851 }
1852 }
1853
1854 if (is_ext_ctrl) {
1855 struct v4l2_ext_controls *p = parg;
1856
1857 /* In case of an error, tell the caller that it wasn't
1858 a specific control that caused it. */
1859 p->error_idx = p->count;
1860 user_ptr = (void __user *)p->controls;
1861 if (p->count) {
1862 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1863 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1864 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1865 err = -ENOMEM;
1866 if (NULL == mbuf)
1867 goto out_ext_ctrl;
1868 err = -EFAULT;
1869 if (copy_from_user(mbuf, user_ptr, ctrls_size))
1870 goto out_ext_ctrl;
1871 p->controls = mbuf;
1872 }
1873 }
1874
1875 /* Handles IOCTL */
1876 err = __video_do_ioctl(file, cmd, parg);
1877 if (err == -ENOIOCTLCMD)
1878 err = -EINVAL;
1879 if (is_ext_ctrl) {
1880 struct v4l2_ext_controls *p = parg;
1881
1882 p->controls = (void *)user_ptr;
1883 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1884 err = -EFAULT;
1885 goto out_ext_ctrl;
1886 }
1887 if (err < 0)
1888 goto out;
1889
1890 out_ext_ctrl:
1891 /* Copy results into user buffer */
1892 switch (_IOC_DIR(cmd)) {
1893 case _IOC_READ:
1894 case (_IOC_WRITE | _IOC_READ):
1895 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1896 err = -EFAULT;
1897 break;
1898 }
1899
1900 out:
1901 kfree(mbuf);
1902 return err;
1903 }
1904 EXPORT_SYMBOL(video_ioctl2);
Linux kernel - Deliverables
This page took 0.069172 seconds and 6 git commands to generate.