tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#define dbgarg3(fmt, arg...) \
46 do { \
47 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
48 printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
49 } while (0)
50
51/* Zero out the end of the struct pointed to by p. Everthing after, but
52 * not including, the specified field is cleared. */
53#define CLEAR_AFTER_FIELD(p, field) \
54 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
55 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
56
57struct std_descr {
58 v4l2_std_id std;
59 const char *descr;
60};
61
62static const struct std_descr standards[] = {
63 { V4L2_STD_NTSC, "NTSC" },
64 { V4L2_STD_NTSC_M, "NTSC-M" },
65 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
66 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
67 { V4L2_STD_NTSC_443, "NTSC-443" },
68 { V4L2_STD_PAL, "PAL" },
69 { V4L2_STD_PAL_BG, "PAL-BG" },
70 { V4L2_STD_PAL_B, "PAL-B" },
71 { V4L2_STD_PAL_B1, "PAL-B1" },
72 { V4L2_STD_PAL_G, "PAL-G" },
73 { V4L2_STD_PAL_H, "PAL-H" },
74 { V4L2_STD_PAL_I, "PAL-I" },
75 { V4L2_STD_PAL_DK, "PAL-DK" },
76 { V4L2_STD_PAL_D, "PAL-D" },
77 { V4L2_STD_PAL_D1, "PAL-D1" },
78 { V4L2_STD_PAL_K, "PAL-K" },
79 { V4L2_STD_PAL_M, "PAL-M" },
80 { V4L2_STD_PAL_N, "PAL-N" },
81 { V4L2_STD_PAL_Nc, "PAL-Nc" },
82 { V4L2_STD_PAL_60, "PAL-60" },
83 { V4L2_STD_SECAM, "SECAM" },
84 { V4L2_STD_SECAM_B, "SECAM-B" },
85 { V4L2_STD_SECAM_G, "SECAM-G" },
86 { V4L2_STD_SECAM_H, "SECAM-H" },
87 { V4L2_STD_SECAM_DK, "SECAM-DK" },
88 { V4L2_STD_SECAM_D, "SECAM-D" },
89 { V4L2_STD_SECAM_K, "SECAM-K" },
90 { V4L2_STD_SECAM_K1, "SECAM-K1" },
91 { V4L2_STD_SECAM_L, "SECAM-L" },
92 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
93 { 0, "Unknown" }
94};
95
96/* video4linux standard ID conversion to standard name
97 */
98const char *v4l2_norm_to_name(v4l2_std_id id)
99{
100 u32 myid = id;
101 int i;
102
103 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
104 64 bit comparations. So, on that architecture, with some gcc
105 variants, compilation fails. Currently, the max value is 30bit wide.
106 */
107 BUG_ON(myid != id);
108
109 for (i = 0; standards[i].std; i++)
110 if (myid == standards[i].std)
111 break;
112 return standards[i].descr;
113}
114EXPORT_SYMBOL(v4l2_norm_to_name);
115
116/* Returns frame period for the given standard */
117void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
118{
119 if (id & V4L2_STD_525_60) {
120 frameperiod->numerator = 1001;
121 frameperiod->denominator = 30000;
122 } else {
123 frameperiod->numerator = 1;
124 frameperiod->denominator = 25;
125 }
126}
127EXPORT_SYMBOL(v4l2_video_std_frame_period);
128
129/* Fill in the fields of a v4l2_standard structure according to the
130 'id' and 'transmission' parameters. Returns negative on error. */
131int v4l2_video_std_construct(struct v4l2_standard *vs,
132 int id, const char *name)
133{
134 vs->id = id;
135 v4l2_video_std_frame_period(id, &vs->frameperiod);
136 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
137 strlcpy(vs->name, name, sizeof(vs->name));
138 return 0;
139}
140EXPORT_SYMBOL(v4l2_video_std_construct);
141
142/* ----------------------------------------------------------------- */
143/* some arrays for pretty-printing debug messages of enum types */
144
145const char *v4l2_field_names[] = {
146 [V4L2_FIELD_ANY] = "any",
147 [V4L2_FIELD_NONE] = "none",
148 [V4L2_FIELD_TOP] = "top",
149 [V4L2_FIELD_BOTTOM] = "bottom",
150 [V4L2_FIELD_INTERLACED] = "interlaced",
151 [V4L2_FIELD_SEQ_TB] = "seq-tb",
152 [V4L2_FIELD_SEQ_BT] = "seq-bt",
153 [V4L2_FIELD_ALTERNATE] = "alternate",
154 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
155 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
156};
157EXPORT_SYMBOL(v4l2_field_names);
158
159const char *v4l2_type_names[] = {
160 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
161 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
162 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
163 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
164 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
165 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
166 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
167 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
168};
169EXPORT_SYMBOL(v4l2_type_names);
170
171static const char *v4l2_memory_names[] = {
172 [V4L2_MEMORY_MMAP] = "mmap",
173 [V4L2_MEMORY_USERPTR] = "userptr",
174 [V4L2_MEMORY_OVERLAY] = "overlay",
175};
176
177#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
178 arr[a] : "unknown")
179
180/* ------------------------------------------------------------------ */
181/* debug help functions */
182
183#ifdef CONFIG_VIDEO_V4L1_COMPAT
184static const char *v4l1_ioctls[] = {
185 [_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
186 [_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
187 [_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
188 [_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
189 [_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
190 [_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
191 [_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
192 [_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
193 [_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
194 [_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
195 [_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
196 [_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
197 [_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
198 [_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
199 [_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
200 [_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
201 [_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
202 [_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
203 [_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
204 [_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
205 [_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
206 [_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
207 [_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
208 [_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
209 [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
210 [_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
211 [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
212 [_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
213 [_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
214};
215#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
216#endif
217
218static const char *v4l2_ioctls[] = {
219 [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
220 [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
221 [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
222 [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
223 [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
224 [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
225 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
226 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
227 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
228 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
229 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
230 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
231 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
232 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
233 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
234 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
235 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
236 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
237 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
238 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
239 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
240 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
241 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
242 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
243 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
244 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
245 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
246 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
247 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
248 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
249 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
250 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
251 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
252 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
253 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
254 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
255 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
256 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
257 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
258 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
259 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
260 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
261 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
262 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
263 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
264 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
265 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
266 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
267 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
268 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
269 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
270 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
271 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
272 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
273 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
274#if 1
275 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
276 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
277 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
278 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
279 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
280
281 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
282 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
283
284 [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
285 [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK",
286#endif
287};
288#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
289
290/* Common ioctl debug function. This function can be used by
291 external ioctl messages as well as internal V4L ioctl */
292void v4l_printk_ioctl(unsigned int cmd)
293{
294 char *dir, *type;
295
296 switch (_IOC_TYPE(cmd)) {
297 case 'd':
298 type = "v4l2_int";
299 break;
300#ifdef CONFIG_VIDEO_V4L1_COMPAT
301 case 'v':
302 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
303 type = "v4l1";
304 break;
305 }
306 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
307 return;
308#endif
309 case 'V':
310 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
311 type = "v4l2";
312 break;
313 }
314 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
315 return;
316 default:
317 type = "unknown";
318 }
319
320 switch (_IOC_DIR(cmd)) {
321 case _IOC_NONE: dir = "--"; break;
322 case _IOC_READ: dir = "r-"; break;
323 case _IOC_WRITE: dir = "-w"; break;
324 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
325 default: dir = "*ERR*"; break;
326 }
327 printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
328 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
329}
330EXPORT_SYMBOL(v4l_printk_ioctl);
331
332/*
333 * helper function -- handles userspace copying for ioctl arguments
334 */
335
336#ifdef __OLD_VIDIOC_
337static unsigned int
338video_fix_command(unsigned int cmd)
339{
340 switch (cmd) {
341 case VIDIOC_OVERLAY_OLD:
342 cmd = VIDIOC_OVERLAY;
343 break;
344 case VIDIOC_S_PARM_OLD:
345 cmd = VIDIOC_S_PARM;
346 break;
347 case VIDIOC_S_CTRL_OLD:
348 cmd = VIDIOC_S_CTRL;
349 break;
350 case VIDIOC_G_AUDIO_OLD:
351 cmd = VIDIOC_G_AUDIO;
352 break;
353 case VIDIOC_G_AUDOUT_OLD:
354 cmd = VIDIOC_G_AUDOUT;
355 break;
356 case VIDIOC_CROPCAP_OLD:
357 cmd = VIDIOC_CROPCAP;
358 break;
359 }
360 return cmd;
361}
362#endif
363
364/*
365 * Obsolete usercopy function - Should be removed soon
366 */
367long
368video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
369 v4l2_kioctl func)
370{
371 char sbuf[128];
372 void *mbuf = NULL;
373 void *parg = NULL;
374 long err = -EINVAL;
375 int is_ext_ctrl;
376 size_t ctrls_size = 0;
377 void __user *user_ptr = NULL;
378
379#ifdef __OLD_VIDIOC_
380 cmd = video_fix_command(cmd);
381#endif
382 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
383 cmd == VIDIOC_TRY_EXT_CTRLS);
384
385 /* Copy arguments into temp kernel buffer */
386 switch (_IOC_DIR(cmd)) {
387 case _IOC_NONE:
388 parg = NULL;
389 break;
390 case _IOC_READ:
391 case _IOC_WRITE:
392 case (_IOC_WRITE | _IOC_READ):
393 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
394 parg = sbuf;
395 } else {
396 /* too big to allocate from stack */
397 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
398 if (NULL == mbuf)
399 return -ENOMEM;
400 parg = mbuf;
401 }
402
403 err = -EFAULT;
404 if (_IOC_DIR(cmd) & _IOC_WRITE)
405 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
406 goto out;
407 break;
408 }
409 if (is_ext_ctrl) {
410 struct v4l2_ext_controls *p = parg;
411
412 /* In case of an error, tell the caller that it wasn't
413 a specific control that caused it. */
414 p->error_idx = p->count;
415 user_ptr = (void __user *)p->controls;
416 if (p->count) {
417 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
418 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
419 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
420 err = -ENOMEM;
421 if (NULL == mbuf)
422 goto out_ext_ctrl;
423 err = -EFAULT;
424 if (copy_from_user(mbuf, user_ptr, ctrls_size))
425 goto out_ext_ctrl;
426 p->controls = mbuf;
427 }
428 }
429
430 /* call driver */
431 err = func(file, cmd, parg);
432 if (err == -ENOIOCTLCMD)
433 err = -EINVAL;
434 if (is_ext_ctrl) {
435 struct v4l2_ext_controls *p = parg;
436
437 p->controls = (void *)user_ptr;
438 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
439 err = -EFAULT;
440 goto out_ext_ctrl;
441 }
442 if (err < 0)
443 goto out;
444
445out_ext_ctrl:
446 /* Copy results into user buffer */
447 switch (_IOC_DIR(cmd)) {
448 case _IOC_READ:
449 case (_IOC_WRITE | _IOC_READ):
450 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
451 err = -EFAULT;
452 break;
453 }
454
455out:
456 kfree(mbuf);
457 return err;
458}
459EXPORT_SYMBOL(video_usercopy);
460
461static void dbgbuf(unsigned int cmd, struct video_device *vfd,
462 struct v4l2_buffer *p)
463{
464 struct v4l2_timecode *tc = &p->timecode;
465
466 dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
467 "bytesused=%d, flags=0x%08d, "
468 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
469 p->timestamp.tv_sec / 3600,
470 (int)(p->timestamp.tv_sec / 60) % 60,
471 (int)(p->timestamp.tv_sec % 60),
472 (long)p->timestamp.tv_usec,
473 p->index,
474 prt_names(p->type, v4l2_type_names),
475 p->bytesused, p->flags,
476 p->field, p->sequence,
477 prt_names(p->memory, v4l2_memory_names),
478 p->m.userptr, p->length);
479 dbgarg2("timecode=%02d:%02d:%02d type=%d, "
480 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
481 tc->hours, tc->minutes, tc->seconds,
482 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
483}
484
485static inline void dbgrect(struct video_device *vfd, char *s,
486 struct v4l2_rect *r)
487{
488 dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
489 r->width, r->height);
490};
491
492static inline void v4l_print_pix_fmt(struct video_device *vfd,
493 struct v4l2_pix_format *fmt)
494{
495 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
496 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
497 fmt->width, fmt->height,
498 (fmt->pixelformat & 0xff),
499 (fmt->pixelformat >> 8) & 0xff,
500 (fmt->pixelformat >> 16) & 0xff,
501 (fmt->pixelformat >> 24) & 0xff,
502 prt_names(fmt->field, v4l2_field_names),
503 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
504};
505
506static inline void v4l_print_ext_ctrls(unsigned int cmd,
507 struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
508{
509 __u32 i;
510
511 if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
512 return;
513 dbgarg(cmd, "");
514 printk(KERN_CONT "class=0x%x", c->ctrl_class);
515 for (i = 0; i < c->count; i++) {
516 if (show_vals && !c->controls[i].size)
517 printk(KERN_CONT " id/val=0x%x/0x%x",
518 c->controls[i].id, c->controls[i].value);
519 else
520 printk(KERN_CONT " id=0x%x,size=%u",
521 c->controls[i].id, c->controls[i].size);
522 }
523 printk(KERN_CONT "\n");
524};
525
526static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
527{
528 __u32 i;
529
530 /* zero the reserved fields */
531 c->reserved[0] = c->reserved[1] = 0;
532 for (i = 0; i < c->count; i++)
533 c->controls[i].reserved2[0] = 0;
534
535 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
536 when using extended controls.
537 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
538 is it allowed for backwards compatibility.
539 */
540 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
541 return 0;
542 /* Check that all controls are from the same control class. */
543 for (i = 0; i < c->count; i++) {
544 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
545 c->error_idx = i;
546 return 0;
547 }
548 }
549 return 1;
550}
551
552static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
553{
554 if (ops == NULL)
555 return -EINVAL;
556
557 switch (type) {
558 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
559 if (ops->vidioc_g_fmt_vid_cap)
560 return 0;
561 break;
562 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
563 if (ops->vidioc_g_fmt_vid_overlay)
564 return 0;
565 break;
566 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
567 if (ops->vidioc_g_fmt_vid_out)
568 return 0;
569 break;
570 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
571 if (ops->vidioc_g_fmt_vid_out_overlay)
572 return 0;
573 break;
574 case V4L2_BUF_TYPE_VBI_CAPTURE:
575 if (ops->vidioc_g_fmt_vbi_cap)
576 return 0;
577 break;
578 case V4L2_BUF_TYPE_VBI_OUTPUT:
579 if (ops->vidioc_g_fmt_vbi_out)
580 return 0;
581 break;
582 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
583 if (ops->vidioc_g_fmt_sliced_vbi_cap)
584 return 0;
585 break;
586 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
587 if (ops->vidioc_g_fmt_sliced_vbi_out)
588 return 0;
589 break;
590 case V4L2_BUF_TYPE_PRIVATE:
591 if (ops->vidioc_g_fmt_type_private)
592 return 0;
593 break;
594 }
595 return -EINVAL;
596}
597
598static long __video_do_ioctl(struct file *file,
599 unsigned int cmd, void *arg)
600{
601 struct video_device *vfd = video_devdata(file);
602 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
603 void *fh = file->private_data;
604 long ret = -EINVAL;
605
606 if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
607 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
608 v4l_print_ioctl(vfd->name, cmd);
609 printk(KERN_CONT "\n");
610 }
611
612 if (ops == NULL) {
613 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
614 vfd->name);
615 return -EINVAL;
616 }
617
618#ifdef CONFIG_VIDEO_V4L1_COMPAT
619 /***********************************************************
620 Handles calls to the obsoleted V4L1 API
621 Due to the nature of VIDIOCGMBUF, each driver that supports
622 V4L1 should implement its own handler for this ioctl.
623 ***********************************************************/
624
625 /* --- streaming capture ------------------------------------- */
626 if (cmd == VIDIOCGMBUF) {
627 struct video_mbuf *p = arg;
628
629 if (!ops->vidiocgmbuf)
630 return ret;
631 ret = ops->vidiocgmbuf(file, fh, p);
632 if (!ret)
633 dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
634 p->size, p->frames,
635 (unsigned long)p->offsets);
636 return ret;
637 }
638
639 /********************************************************
640 All other V4L1 calls are handled by v4l1_compat module.
641 Those calls will be translated into V4L2 calls, and
642 __video_do_ioctl will be called again, with one or more
643 V4L2 ioctls.
644 ********************************************************/
645 if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
646 return v4l_compat_translate_ioctl(file, cmd, arg,
647 __video_do_ioctl);
648#endif
649
650 switch (cmd) {
651 /* --- capabilities ------------------------------------------ */
652 case VIDIOC_QUERYCAP:
653 {
654 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
655
656 if (!ops->vidioc_querycap)
657 break;
658
659 ret = ops->vidioc_querycap(file, fh, cap);
660 if (!ret)
661 dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
662 "version=0x%08x, "
663 "capabilities=0x%08x\n",
664 cap->driver, cap->card, cap->bus_info,
665 cap->version,
666 cap->capabilities);
667 break;
668 }
669
670 /* --- priority ------------------------------------------ */
671 case VIDIOC_G_PRIORITY:
672 {
673 enum v4l2_priority *p = arg;
674
675 if (!ops->vidioc_g_priority)
676 break;
677 ret = ops->vidioc_g_priority(file, fh, p);
678 if (!ret)
679 dbgarg(cmd, "priority is %d\n", *p);
680 break;
681 }
682 case VIDIOC_S_PRIORITY:
683 {
684 enum v4l2_priority *p = arg;
685
686 if (!ops->vidioc_s_priority)
687 break;
688 dbgarg(cmd, "setting priority to %d\n", *p);
689 ret = ops->vidioc_s_priority(file, fh, *p);
690 break;
691 }
692
693 /* --- capture ioctls ---------------------------------------- */
694 case VIDIOC_ENUM_FMT:
695 {
696 struct v4l2_fmtdesc *f = arg;
697
698 switch (f->type) {
699 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
700 if (ops->vidioc_enum_fmt_vid_cap)
701 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
702 break;
703 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
704 if (ops->vidioc_enum_fmt_vid_overlay)
705 ret = ops->vidioc_enum_fmt_vid_overlay(file,
706 fh, f);
707 break;
708 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
709 if (ops->vidioc_enum_fmt_vid_out)
710 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
711 break;
712 case V4L2_BUF_TYPE_PRIVATE:
713 if (ops->vidioc_enum_fmt_type_private)
714 ret = ops->vidioc_enum_fmt_type_private(file,
715 fh, f);
716 break;
717 default:
718 break;
719 }
720 if (!ret)
721 dbgarg(cmd, "index=%d, type=%d, flags=%d, "
722 "pixelformat=%c%c%c%c, description='%s'\n",
723 f->index, f->type, f->flags,
724 (f->pixelformat & 0xff),
725 (f->pixelformat >> 8) & 0xff,
726 (f->pixelformat >> 16) & 0xff,
727 (f->pixelformat >> 24) & 0xff,
728 f->description);
729 break;
730 }
731 case VIDIOC_G_FMT:
732 {
733 struct v4l2_format *f = (struct v4l2_format *)arg;
734
735 /* FIXME: Should be one dump per type */
736 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
737
738 switch (f->type) {
739 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
740 if (ops->vidioc_g_fmt_vid_cap)
741 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
742 if (!ret)
743 v4l_print_pix_fmt(vfd, &f->fmt.pix);
744 break;
745 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
746 if (ops->vidioc_g_fmt_vid_overlay)
747 ret = ops->vidioc_g_fmt_vid_overlay(file,
748 fh, f);
749 break;
750 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
751 if (ops->vidioc_g_fmt_vid_out)
752 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
753 if (!ret)
754 v4l_print_pix_fmt(vfd, &f->fmt.pix);
755 break;
756 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
757 if (ops->vidioc_g_fmt_vid_out_overlay)
758 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
759 fh, f);
760 break;
761 case V4L2_BUF_TYPE_VBI_CAPTURE:
762 if (ops->vidioc_g_fmt_vbi_cap)
763 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
764 break;
765 case V4L2_BUF_TYPE_VBI_OUTPUT:
766 if (ops->vidioc_g_fmt_vbi_out)
767 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
768 break;
769 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
770 if (ops->vidioc_g_fmt_sliced_vbi_cap)
771 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
772 fh, f);
773 break;
774 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
775 if (ops->vidioc_g_fmt_sliced_vbi_out)
776 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
777 fh, f);
778 break;
779 case V4L2_BUF_TYPE_PRIVATE:
780 if (ops->vidioc_g_fmt_type_private)
781 ret = ops->vidioc_g_fmt_type_private(file,
782 fh, f);
783 break;
784 }
785
786 break;
787 }
788 case VIDIOC_S_FMT:
789 {
790 struct v4l2_format *f = (struct v4l2_format *)arg;
791
792 /* FIXME: Should be one dump per type */
793 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
794
795 switch (f->type) {
796 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
797 CLEAR_AFTER_FIELD(f, fmt.pix);
798 v4l_print_pix_fmt(vfd, &f->fmt.pix);
799 if (ops->vidioc_s_fmt_vid_cap)
800 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
801 break;
802 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
803 CLEAR_AFTER_FIELD(f, fmt.win);
804 if (ops->vidioc_s_fmt_vid_overlay)
805 ret = ops->vidioc_s_fmt_vid_overlay(file,
806 fh, f);
807 break;
808 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
809 CLEAR_AFTER_FIELD(f, fmt.pix);
810 v4l_print_pix_fmt(vfd, &f->fmt.pix);
811 if (ops->vidioc_s_fmt_vid_out)
812 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
813 break;
814 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
815 CLEAR_AFTER_FIELD(f, fmt.win);
816 if (ops->vidioc_s_fmt_vid_out_overlay)
817 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
818 fh, f);
819 break;
820 case V4L2_BUF_TYPE_VBI_CAPTURE:
821 CLEAR_AFTER_FIELD(f, fmt.vbi);
822 if (ops->vidioc_s_fmt_vbi_cap)
823 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
824 break;
825 case V4L2_BUF_TYPE_VBI_OUTPUT:
826 CLEAR_AFTER_FIELD(f, fmt.vbi);
827 if (ops->vidioc_s_fmt_vbi_out)
828 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
829 break;
830 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
831 CLEAR_AFTER_FIELD(f, fmt.sliced);
832 if (ops->vidioc_s_fmt_sliced_vbi_cap)
833 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
834 fh, f);
835 break;
836 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
837 CLEAR_AFTER_FIELD(f, fmt.sliced);
838 if (ops->vidioc_s_fmt_sliced_vbi_out)
839 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
840 fh, f);
841 break;
842 case V4L2_BUF_TYPE_PRIVATE:
843 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
844 if (ops->vidioc_s_fmt_type_private)
845 ret = ops->vidioc_s_fmt_type_private(file,
846 fh, f);
847 break;
848 }
849 break;
850 }
851 case VIDIOC_TRY_FMT:
852 {
853 struct v4l2_format *f = (struct v4l2_format *)arg;
854
855 /* FIXME: Should be one dump per type */
856 dbgarg(cmd, "type=%s\n", prt_names(f->type,
857 v4l2_type_names));
858 switch (f->type) {
859 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
860 CLEAR_AFTER_FIELD(f, fmt.pix);
861 if (ops->vidioc_try_fmt_vid_cap)
862 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
863 if (!ret)
864 v4l_print_pix_fmt(vfd, &f->fmt.pix);
865 break;
866 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
867 CLEAR_AFTER_FIELD(f, fmt.win);
868 if (ops->vidioc_try_fmt_vid_overlay)
869 ret = ops->vidioc_try_fmt_vid_overlay(file,
870 fh, f);
871 break;
872 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
873 CLEAR_AFTER_FIELD(f, fmt.pix);
874 if (ops->vidioc_try_fmt_vid_out)
875 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
876 if (!ret)
877 v4l_print_pix_fmt(vfd, &f->fmt.pix);
878 break;
879 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
880 CLEAR_AFTER_FIELD(f, fmt.win);
881 if (ops->vidioc_try_fmt_vid_out_overlay)
882 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
883 fh, f);
884 break;
885 case V4L2_BUF_TYPE_VBI_CAPTURE:
886 CLEAR_AFTER_FIELD(f, fmt.vbi);
887 if (ops->vidioc_try_fmt_vbi_cap)
888 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
889 break;
890 case V4L2_BUF_TYPE_VBI_OUTPUT:
891 CLEAR_AFTER_FIELD(f, fmt.vbi);
892 if (ops->vidioc_try_fmt_vbi_out)
893 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
894 break;
895 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
896 CLEAR_AFTER_FIELD(f, fmt.sliced);
897 if (ops->vidioc_try_fmt_sliced_vbi_cap)
898 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
899 fh, f);
900 break;
901 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
902 CLEAR_AFTER_FIELD(f, fmt.sliced);
903 if (ops->vidioc_try_fmt_sliced_vbi_out)
904 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
905 fh, f);
906 break;
907 case V4L2_BUF_TYPE_PRIVATE:
908 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
909 if (ops->vidioc_try_fmt_type_private)
910 ret = ops->vidioc_try_fmt_type_private(file,
911 fh, f);
912 break;
913 }
914
915 break;
916 }
917 /* FIXME: Those buf reqs could be handled here,
918 with some changes on videobuf to allow its header to be included at
919 videodev2.h or being merged at videodev2.
920 */
921 case VIDIOC_REQBUFS:
922 {
923 struct v4l2_requestbuffers *p = arg;
924
925 if (!ops->vidioc_reqbufs)
926 break;
927 ret = check_fmt(ops, p->type);
928 if (ret)
929 break;
930
931 if (p->type < V4L2_BUF_TYPE_PRIVATE)
932 CLEAR_AFTER_FIELD(p, memory);
933
934 ret = ops->vidioc_reqbufs(file, fh, p);
935 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
936 p->count,
937 prt_names(p->type, v4l2_type_names),
938 prt_names(p->memory, v4l2_memory_names));
939 break;
940 }
941 case VIDIOC_QUERYBUF:
942 {
943 struct v4l2_buffer *p = arg;
944
945 if (!ops->vidioc_querybuf)
946 break;
947 ret = check_fmt(ops, p->type);
948 if (ret)
949 break;
950
951 ret = ops->vidioc_querybuf(file, fh, p);
952 if (!ret)
953 dbgbuf(cmd, vfd, p);
954 break;
955 }
956 case VIDIOC_QBUF:
957 {
958 struct v4l2_buffer *p = arg;
959
960 if (!ops->vidioc_qbuf)
961 break;
962 ret = check_fmt(ops, p->type);
963 if (ret)
964 break;
965
966 ret = ops->vidioc_qbuf(file, fh, p);
967 if (!ret)
968 dbgbuf(cmd, vfd, p);
969 break;
970 }
971 case VIDIOC_DQBUF:
972 {
973 struct v4l2_buffer *p = arg;
974
975 if (!ops->vidioc_dqbuf)
976 break;
977 ret = check_fmt(ops, p->type);
978 if (ret)
979 break;
980
981 ret = ops->vidioc_dqbuf(file, fh, p);
982 if (!ret)
983 dbgbuf(cmd, vfd, p);
984 break;
985 }
986 case VIDIOC_OVERLAY:
987 {
988 int *i = arg;
989
990 if (!ops->vidioc_overlay)
991 break;
992 dbgarg(cmd, "value=%d\n", *i);
993 ret = ops->vidioc_overlay(file, fh, *i);
994 break;
995 }
996 case VIDIOC_G_FBUF:
997 {
998 struct v4l2_framebuffer *p = arg;
999
1000 if (!ops->vidioc_g_fbuf)
1001 break;
1002 ret = ops->vidioc_g_fbuf(file, fh, arg);
1003 if (!ret) {
1004 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1005 p->capability, p->flags,
1006 (unsigned long)p->base);
1007 v4l_print_pix_fmt(vfd, &p->fmt);
1008 }
1009 break;
1010 }
1011 case VIDIOC_S_FBUF:
1012 {
1013 struct v4l2_framebuffer *p = arg;
1014
1015 if (!ops->vidioc_s_fbuf)
1016 break;
1017 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1018 p->capability, p->flags, (unsigned long)p->base);
1019 v4l_print_pix_fmt(vfd, &p->fmt);
1020 ret = ops->vidioc_s_fbuf(file, fh, arg);
1021 break;
1022 }
1023 case VIDIOC_STREAMON:
1024 {
1025 enum v4l2_buf_type i = *(int *)arg;
1026
1027 if (!ops->vidioc_streamon)
1028 break;
1029 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1030 ret = ops->vidioc_streamon(file, fh, i);
1031 break;
1032 }
1033 case VIDIOC_STREAMOFF:
1034 {
1035 enum v4l2_buf_type i = *(int *)arg;
1036
1037 if (!ops->vidioc_streamoff)
1038 break;
1039 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1040 ret = ops->vidioc_streamoff(file, fh, i);
1041 break;
1042 }
1043 /* ---------- tv norms ---------- */
1044 case VIDIOC_ENUMSTD:
1045 {
1046 struct v4l2_standard *p = arg;
1047 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1048 unsigned int index = p->index, i, j = 0;
1049 const char *descr = "";
1050
1051 /* Return norm array in a canonical way */
1052 for (i = 0; i <= index && id; i++) {
1053 /* last std value in the standards array is 0, so this
1054 while always ends there since (id & 0) == 0. */
1055 while ((id & standards[j].std) != standards[j].std)
1056 j++;
1057 curr_id = standards[j].std;
1058 descr = standards[j].descr;
1059 j++;
1060 if (curr_id == 0)
1061 break;
1062 if (curr_id != V4L2_STD_PAL &&
1063 curr_id != V4L2_STD_SECAM &&
1064 curr_id != V4L2_STD_NTSC)
1065 id &= ~curr_id;
1066 }
1067 if (i <= index)
1068 return -EINVAL;
1069
1070 v4l2_video_std_construct(p, curr_id, descr);
1071
1072 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1073 "framelines=%d\n", p->index,
1074 (unsigned long long)p->id, p->name,
1075 p->frameperiod.numerator,
1076 p->frameperiod.denominator,
1077 p->framelines);
1078
1079 ret = 0;
1080 break;
1081 }
1082 case VIDIOC_G_STD:
1083 {
1084 v4l2_std_id *id = arg;
1085
1086 ret = 0;
1087 /* Calls the specific handler */
1088 if (ops->vidioc_g_std)
1089 ret = ops->vidioc_g_std(file, fh, id);
1090 else if (vfd->current_norm)
1091 *id = vfd->current_norm;
1092 else
1093 ret = -EINVAL;
1094
1095 if (!ret)
1096 dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1097 break;
1098 }
1099 case VIDIOC_S_STD:
1100 {
1101 v4l2_std_id *id = arg, norm;
1102
1103 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1104
1105 norm = (*id) & vfd->tvnorms;
1106 if (vfd->tvnorms && !norm) /* Check if std is supported */
1107 break;
1108
1109 /* Calls the specific handler */
1110 if (ops->vidioc_s_std)
1111 ret = ops->vidioc_s_std(file, fh, &norm);
1112 else
1113 ret = -EINVAL;
1114
1115 /* Updates standard information */
1116 if (ret >= 0)
1117 vfd->current_norm = norm;
1118 break;
1119 }
1120 case VIDIOC_QUERYSTD:
1121 {
1122 v4l2_std_id *p = arg;
1123
1124 if (!ops->vidioc_querystd)
1125 break;
1126 ret = ops->vidioc_querystd(file, fh, arg);
1127 if (!ret)
1128 dbgarg(cmd, "detected std=%08Lx\n",
1129 (unsigned long long)*p);
1130 break;
1131 }
1132 /* ------ input switching ---------- */
1133 /* FIXME: Inputs can be handled inside videodev2 */
1134 case VIDIOC_ENUMINPUT:
1135 {
1136 struct v4l2_input *p = arg;
1137
1138 if (!ops->vidioc_enum_input)
1139 break;
1140
1141 ret = ops->vidioc_enum_input(file, fh, p);
1142 if (!ret)
1143 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1144 "audioset=%d, "
1145 "tuner=%d, std=%08Lx, status=%d\n",
1146 p->index, p->name, p->type, p->audioset,
1147 p->tuner,
1148 (unsigned long long)p->std,
1149 p->status);
1150 break;
1151 }
1152 case VIDIOC_G_INPUT:
1153 {
1154 unsigned int *i = arg;
1155
1156 if (!ops->vidioc_g_input)
1157 break;
1158 ret = ops->vidioc_g_input(file, fh, i);
1159 if (!ret)
1160 dbgarg(cmd, "value=%d\n", *i);
1161 break;
1162 }
1163 case VIDIOC_S_INPUT:
1164 {
1165 unsigned int *i = arg;
1166
1167 if (!ops->vidioc_s_input)
1168 break;
1169 dbgarg(cmd, "value=%d\n", *i);
1170 ret = ops->vidioc_s_input(file, fh, *i);
1171 break;
1172 }
1173
1174 /* ------ output switching ---------- */
1175 case VIDIOC_ENUMOUTPUT:
1176 {
1177 struct v4l2_output *p = arg;
1178
1179 if (!ops->vidioc_enum_output)
1180 break;
1181
1182 ret = ops->vidioc_enum_output(file, fh, p);
1183 if (!ret)
1184 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1185 "audioset=0x%x, "
1186 "modulator=%d, std=0x%08Lx\n",
1187 p->index, p->name, p->type, p->audioset,
1188 p->modulator, (unsigned long long)p->std);
1189 break;
1190 }
1191 case VIDIOC_G_OUTPUT:
1192 {
1193 unsigned int *i = arg;
1194
1195 if (!ops->vidioc_g_output)
1196 break;
1197 ret = ops->vidioc_g_output(file, fh, i);
1198 if (!ret)
1199 dbgarg(cmd, "value=%d\n", *i);
1200 break;
1201 }
1202 case VIDIOC_S_OUTPUT:
1203 {
1204 unsigned int *i = arg;
1205
1206 if (!ops->vidioc_s_output)
1207 break;
1208 dbgarg(cmd, "value=%d\n", *i);
1209 ret = ops->vidioc_s_output(file, fh, *i);
1210 break;
1211 }
1212
1213 /* --- controls ---------------------------------------------- */
1214 case VIDIOC_QUERYCTRL:
1215 {
1216 struct v4l2_queryctrl *p = arg;
1217
1218 if (!ops->vidioc_queryctrl)
1219 break;
1220 ret = ops->vidioc_queryctrl(file, fh, p);
1221 if (!ret)
1222 dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1223 "step=%d, default=%d, flags=0x%08x\n",
1224 p->id, p->type, p->name,
1225 p->minimum, p->maximum,
1226 p->step, p->default_value, p->flags);
1227 else
1228 dbgarg(cmd, "id=0x%x\n", p->id);
1229 break;
1230 }
1231 case VIDIOC_G_CTRL:
1232 {
1233 struct v4l2_control *p = arg;
1234
1235 if (ops->vidioc_g_ctrl)
1236 ret = ops->vidioc_g_ctrl(file, fh, p);
1237 else if (ops->vidioc_g_ext_ctrls) {
1238 struct v4l2_ext_controls ctrls;
1239 struct v4l2_ext_control ctrl;
1240
1241 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1242 ctrls.count = 1;
1243 ctrls.controls = &ctrl;
1244 ctrl.id = p->id;
1245 ctrl.value = p->value;
1246 if (check_ext_ctrls(&ctrls, 1)) {
1247 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1248 if (ret == 0)
1249 p->value = ctrl.value;
1250 }
1251 } else
1252 break;
1253 if (!ret)
1254 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1255 else
1256 dbgarg(cmd, "id=0x%x\n", p->id);
1257 break;
1258 }
1259 case VIDIOC_S_CTRL:
1260 {
1261 struct v4l2_control *p = arg;
1262 struct v4l2_ext_controls ctrls;
1263 struct v4l2_ext_control ctrl;
1264
1265 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1266 break;
1267
1268 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1269
1270 if (ops->vidioc_s_ctrl) {
1271 ret = ops->vidioc_s_ctrl(file, fh, p);
1272 break;
1273 }
1274 if (!ops->vidioc_s_ext_ctrls)
1275 break;
1276
1277 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1278 ctrls.count = 1;
1279 ctrls.controls = &ctrl;
1280 ctrl.id = p->id;
1281 ctrl.value = p->value;
1282 if (check_ext_ctrls(&ctrls, 1))
1283 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1284 break;
1285 }
1286 case VIDIOC_G_EXT_CTRLS:
1287 {
1288 struct v4l2_ext_controls *p = arg;
1289
1290 p->error_idx = p->count;
1291 if (!ops->vidioc_g_ext_ctrls)
1292 break;
1293 if (check_ext_ctrls(p, 0))
1294 ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1295 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1296 break;
1297 }
1298 case VIDIOC_S_EXT_CTRLS:
1299 {
1300 struct v4l2_ext_controls *p = arg;
1301
1302 p->error_idx = p->count;
1303 if (!ops->vidioc_s_ext_ctrls)
1304 break;
1305 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1306 if (check_ext_ctrls(p, 0))
1307 ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1308 break;
1309 }
1310 case VIDIOC_TRY_EXT_CTRLS:
1311 {
1312 struct v4l2_ext_controls *p = arg;
1313
1314 p->error_idx = p->count;
1315 if (!ops->vidioc_try_ext_ctrls)
1316 break;
1317 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1318 if (check_ext_ctrls(p, 0))
1319 ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1320 break;
1321 }
1322 case VIDIOC_QUERYMENU:
1323 {
1324 struct v4l2_querymenu *p = arg;
1325
1326 if (!ops->vidioc_querymenu)
1327 break;
1328 ret = ops->vidioc_querymenu(file, fh, p);
1329 if (!ret)
1330 dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1331 p->id, p->index, p->name);
1332 else
1333 dbgarg(cmd, "id=0x%x, index=%d\n",
1334 p->id, p->index);
1335 break;
1336 }
1337 /* --- audio ---------------------------------------------- */
1338 case VIDIOC_ENUMAUDIO:
1339 {
1340 struct v4l2_audio *p = arg;
1341
1342 if (!ops->vidioc_enumaudio)
1343 break;
1344 ret = ops->vidioc_enumaudio(file, fh, p);
1345 if (!ret)
1346 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1347 "mode=0x%x\n", p->index, p->name,
1348 p->capability, p->mode);
1349 else
1350 dbgarg(cmd, "index=%d\n", p->index);
1351 break;
1352 }
1353 case VIDIOC_G_AUDIO:
1354 {
1355 struct v4l2_audio *p = arg;
1356
1357 if (!ops->vidioc_g_audio)
1358 break;
1359
1360 ret = ops->vidioc_g_audio(file, fh, p);
1361 if (!ret)
1362 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1363 "mode=0x%x\n", p->index,
1364 p->name, p->capability, p->mode);
1365 else
1366 dbgarg(cmd, "index=%d\n", p->index);
1367 break;
1368 }
1369 case VIDIOC_S_AUDIO:
1370 {
1371 struct v4l2_audio *p = arg;
1372
1373 if (!ops->vidioc_s_audio)
1374 break;
1375 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1376 "mode=0x%x\n", p->index, p->name,
1377 p->capability, p->mode);
1378 ret = ops->vidioc_s_audio(file, fh, p);
1379 break;
1380 }
1381 case VIDIOC_ENUMAUDOUT:
1382 {
1383 struct v4l2_audioout *p = arg;
1384
1385 if (!ops->vidioc_enumaudout)
1386 break;
1387 dbgarg(cmd, "Enum for index=%d\n", p->index);
1388 ret = ops->vidioc_enumaudout(file, fh, p);
1389 if (!ret)
1390 dbgarg2("index=%d, name=%s, capability=%d, "
1391 "mode=%d\n", p->index, p->name,
1392 p->capability, p->mode);
1393 break;
1394 }
1395 case VIDIOC_G_AUDOUT:
1396 {
1397 struct v4l2_audioout *p = arg;
1398
1399 if (!ops->vidioc_g_audout)
1400 break;
1401
1402 ret = ops->vidioc_g_audout(file, fh, p);
1403 if (!ret)
1404 dbgarg2("index=%d, name=%s, capability=%d, "
1405 "mode=%d\n", p->index, p->name,
1406 p->capability, p->mode);
1407 break;
1408 }
1409 case VIDIOC_S_AUDOUT:
1410 {
1411 struct v4l2_audioout *p = arg;
1412
1413 if (!ops->vidioc_s_audout)
1414 break;
1415 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1416 "mode=%d\n", p->index, p->name,
1417 p->capability, p->mode);
1418
1419 ret = ops->vidioc_s_audout(file, fh, p);
1420 break;
1421 }
1422 case VIDIOC_G_MODULATOR:
1423 {
1424 struct v4l2_modulator *p = arg;
1425
1426 if (!ops->vidioc_g_modulator)
1427 break;
1428 ret = ops->vidioc_g_modulator(file, fh, p);
1429 if (!ret)
1430 dbgarg(cmd, "index=%d, name=%s, "
1431 "capability=%d, rangelow=%d,"
1432 " rangehigh=%d, txsubchans=%d\n",
1433 p->index, p->name, p->capability,
1434 p->rangelow, p->rangehigh,
1435 p->txsubchans);
1436 break;
1437 }
1438 case VIDIOC_S_MODULATOR:
1439 {
1440 struct v4l2_modulator *p = arg;
1441
1442 if (!ops->vidioc_s_modulator)
1443 break;
1444 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1445 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1446 p->index, p->name, p->capability, p->rangelow,
1447 p->rangehigh, p->txsubchans);
1448 ret = ops->vidioc_s_modulator(file, fh, p);
1449 break;
1450 }
1451 case VIDIOC_G_CROP:
1452 {
1453 struct v4l2_crop *p = arg;
1454
1455 if (!ops->vidioc_g_crop)
1456 break;
1457
1458 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1459 ret = ops->vidioc_g_crop(file, fh, p);
1460 if (!ret)
1461 dbgrect(vfd, "", &p->c);
1462 break;
1463 }
1464 case VIDIOC_S_CROP:
1465 {
1466 struct v4l2_crop *p = arg;
1467
1468 if (!ops->vidioc_s_crop)
1469 break;
1470 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1471 dbgrect(vfd, "", &p->c);
1472 ret = ops->vidioc_s_crop(file, fh, p);
1473 break;
1474 }
1475 case VIDIOC_CROPCAP:
1476 {
1477 struct v4l2_cropcap *p = arg;
1478
1479 /*FIXME: Should also show v4l2_fract pixelaspect */
1480 if (!ops->vidioc_cropcap)
1481 break;
1482
1483 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1484 ret = ops->vidioc_cropcap(file, fh, p);
1485 if (!ret) {
1486 dbgrect(vfd, "bounds ", &p->bounds);
1487 dbgrect(vfd, "defrect ", &p->defrect);
1488 }
1489 break;
1490 }
1491 case VIDIOC_G_JPEGCOMP:
1492 {
1493 struct v4l2_jpegcompression *p = arg;
1494
1495 if (!ops->vidioc_g_jpegcomp)
1496 break;
1497
1498 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1499 if (!ret)
1500 dbgarg(cmd, "quality=%d, APPn=%d, "
1501 "APP_len=%d, COM_len=%d, "
1502 "jpeg_markers=%d\n",
1503 p->quality, p->APPn, p->APP_len,
1504 p->COM_len, p->jpeg_markers);
1505 break;
1506 }
1507 case VIDIOC_S_JPEGCOMP:
1508 {
1509 struct v4l2_jpegcompression *p = arg;
1510
1511 if (!ops->vidioc_g_jpegcomp)
1512 break;
1513 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1514 "COM_len=%d, jpeg_markers=%d\n",
1515 p->quality, p->APPn, p->APP_len,
1516 p->COM_len, p->jpeg_markers);
1517 ret = ops->vidioc_s_jpegcomp(file, fh, p);
1518 break;
1519 }
1520 case VIDIOC_G_ENC_INDEX:
1521 {
1522 struct v4l2_enc_idx *p = arg;
1523
1524 if (!ops->vidioc_g_enc_index)
1525 break;
1526 ret = ops->vidioc_g_enc_index(file, fh, p);
1527 if (!ret)
1528 dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1529 p->entries, p->entries_cap);
1530 break;
1531 }
1532 case VIDIOC_ENCODER_CMD:
1533 {
1534 struct v4l2_encoder_cmd *p = arg;
1535
1536 if (!ops->vidioc_encoder_cmd)
1537 break;
1538 ret = ops->vidioc_encoder_cmd(file, fh, p);
1539 if (!ret)
1540 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1541 break;
1542 }
1543 case VIDIOC_TRY_ENCODER_CMD:
1544 {
1545 struct v4l2_encoder_cmd *p = arg;
1546
1547 if (!ops->vidioc_try_encoder_cmd)
1548 break;
1549 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1550 if (!ret)
1551 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1552 break;
1553 }
1554 case VIDIOC_G_PARM:
1555 {
1556 struct v4l2_streamparm *p = arg;
1557
1558 if (ops->vidioc_g_parm) {
1559 ret = check_fmt(ops, p->type);
1560 if (ret)
1561 break;
1562 ret = ops->vidioc_g_parm(file, fh, p);
1563 } else {
1564 v4l2_std_id std = vfd->current_norm;
1565
1566 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1567 return -EINVAL;
1568
1569 ret = 0;
1570 if (ops->vidioc_g_std)
1571 ret = ops->vidioc_g_std(file, fh, &std);
1572 else if (std == 0)
1573 ret = -EINVAL;
1574 if (ret == 0)
1575 v4l2_video_std_frame_period(std,
1576 &p->parm.capture.timeperframe);
1577 }
1578
1579 dbgarg(cmd, "type=%d\n", p->type);
1580 break;
1581 }
1582 case VIDIOC_S_PARM:
1583 {
1584 struct v4l2_streamparm *p = arg;
1585
1586 if (!ops->vidioc_s_parm)
1587 break;
1588 ret = check_fmt(ops, p->type);
1589 if (ret)
1590 break;
1591
1592 dbgarg(cmd, "type=%d\n", p->type);
1593 ret = ops->vidioc_s_parm(file, fh, p);
1594 break;
1595 }
1596 case VIDIOC_G_TUNER:
1597 {
1598 struct v4l2_tuner *p = arg;
1599
1600 if (!ops->vidioc_g_tuner)
1601 break;
1602
1603 ret = ops->vidioc_g_tuner(file, fh, p);
1604 if (!ret)
1605 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1606 "capability=0x%x, rangelow=%d, "
1607 "rangehigh=%d, signal=%d, afc=%d, "
1608 "rxsubchans=0x%x, audmode=%d\n",
1609 p->index, p->name, p->type,
1610 p->capability, p->rangelow,
1611 p->rangehigh, p->signal, p->afc,
1612 p->rxsubchans, p->audmode);
1613 break;
1614 }
1615 case VIDIOC_S_TUNER:
1616 {
1617 struct v4l2_tuner *p = arg;
1618
1619 if (!ops->vidioc_s_tuner)
1620 break;
1621 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1622 "capability=0x%x, rangelow=%d, "
1623 "rangehigh=%d, signal=%d, afc=%d, "
1624 "rxsubchans=0x%x, audmode=%d\n",
1625 p->index, p->name, p->type,
1626 p->capability, p->rangelow,
1627 p->rangehigh, p->signal, p->afc,
1628 p->rxsubchans, p->audmode);
1629 ret = ops->vidioc_s_tuner(file, fh, p);
1630 break;
1631 }
1632 case VIDIOC_G_FREQUENCY:
1633 {
1634 struct v4l2_frequency *p = arg;
1635
1636 if (!ops->vidioc_g_frequency)
1637 break;
1638
1639 ret = ops->vidioc_g_frequency(file, fh, p);
1640 if (!ret)
1641 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1642 p->tuner, p->type, p->frequency);
1643 break;
1644 }
1645 case VIDIOC_S_FREQUENCY:
1646 {
1647 struct v4l2_frequency *p = arg;
1648
1649 if (!ops->vidioc_s_frequency)
1650 break;
1651 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1652 p->tuner, p->type, p->frequency);
1653 ret = ops->vidioc_s_frequency(file, fh, p);
1654 break;
1655 }
1656 case VIDIOC_G_SLICED_VBI_CAP:
1657 {
1658 struct v4l2_sliced_vbi_cap *p = arg;
1659
1660 if (!ops->vidioc_g_sliced_vbi_cap)
1661 break;
1662
1663 /* Clear up to type, everything after type is zerod already */
1664 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1665
1666 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1667 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1668 if (!ret)
1669 dbgarg2("service_set=%d\n", p->service_set);
1670 break;
1671 }
1672 case VIDIOC_LOG_STATUS:
1673 {
1674 if (!ops->vidioc_log_status)
1675 break;
1676 ret = ops->vidioc_log_status(file, fh);
1677 break;
1678 }
1679#ifdef CONFIG_VIDEO_ADV_DEBUG
1680 case VIDIOC_DBG_G_REGISTER:
1681 {
1682 struct v4l2_dbg_register *p = arg;
1683
1684 if (!capable(CAP_SYS_ADMIN))
1685 ret = -EPERM;
1686 else if (ops->vidioc_g_register)
1687 ret = ops->vidioc_g_register(file, fh, p);
1688 break;
1689 }
1690 case VIDIOC_DBG_S_REGISTER:
1691 {
1692 struct v4l2_dbg_register *p = arg;
1693
1694 if (!capable(CAP_SYS_ADMIN))
1695 ret = -EPERM;
1696 else if (ops->vidioc_s_register)
1697 ret = ops->vidioc_s_register(file, fh, p);
1698 break;
1699 }
1700#endif
1701 case VIDIOC_DBG_G_CHIP_IDENT:
1702 {
1703 struct v4l2_dbg_chip_ident *p = arg;
1704
1705 if (!ops->vidioc_g_chip_ident)
1706 break;
1707 p->ident = V4L2_IDENT_NONE;
1708 p->revision = 0;
1709 ret = ops->vidioc_g_chip_ident(file, fh, p);
1710 if (!ret)
1711 dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1712 break;
1713 }
1714 case VIDIOC_S_HW_FREQ_SEEK:
1715 {
1716 struct v4l2_hw_freq_seek *p = arg;
1717
1718 if (!ops->vidioc_s_hw_freq_seek)
1719 break;
1720 dbgarg(cmd,
1721 "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1722 p->tuner, p->type, p->seek_upward, p->wrap_around);
1723 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1724 break;
1725 }
1726 case VIDIOC_ENUM_FRAMESIZES:
1727 {
1728 struct v4l2_frmsizeenum *p = arg;
1729
1730 if (!ops->vidioc_enum_framesizes)
1731 break;
1732
1733 ret = ops->vidioc_enum_framesizes(file, fh, p);
1734 dbgarg(cmd,
1735 "index=%d, pixelformat=%c%c%c%c, type=%d ",
1736 p->index,
1737 (p->pixel_format & 0xff),
1738 (p->pixel_format >> 8) & 0xff,
1739 (p->pixel_format >> 16) & 0xff,
1740 (p->pixel_format >> 24) & 0xff,
1741 p->type);
1742 switch (p->type) {
1743 case V4L2_FRMSIZE_TYPE_DISCRETE:
1744 dbgarg3("width = %d, height=%d\n",
1745 p->discrete.width, p->discrete.height);
1746 break;
1747 case V4L2_FRMSIZE_TYPE_STEPWISE:
1748 dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
1749 p->stepwise.min_width, p->stepwise.min_height,
1750 p->stepwise.step_width, p->stepwise.step_height,
1751 p->stepwise.max_width, p->stepwise.max_height);
1752 break;
1753 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1754 dbgarg3("continuous\n");
1755 break;
1756 default:
1757 dbgarg3("- Unknown type!\n");
1758 }
1759
1760 break;
1761 }
1762 case VIDIOC_ENUM_FRAMEINTERVALS:
1763 {
1764 struct v4l2_frmivalenum *p = arg;
1765
1766 if (!ops->vidioc_enum_frameintervals)
1767 break;
1768
1769 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1770 dbgarg(cmd,
1771 "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1772 p->index, p->pixel_format,
1773 p->width, p->height, p->type);
1774 switch (p->type) {
1775 case V4L2_FRMIVAL_TYPE_DISCRETE:
1776 dbgarg2("fps=%d/%d\n",
1777 p->discrete.numerator,
1778 p->discrete.denominator);
1779 break;
1780 case V4L2_FRMIVAL_TYPE_STEPWISE:
1781 dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1782 p->stepwise.min.numerator,
1783 p->stepwise.min.denominator,
1784 p->stepwise.max.numerator,
1785 p->stepwise.max.denominator,
1786 p->stepwise.step.numerator,
1787 p->stepwise.step.denominator);
1788 break;
1789 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1790 dbgarg2("continuous\n");
1791 break;
1792 default:
1793 dbgarg2("- Unknown type!\n");
1794 }
1795 break;
1796 }
1797
1798 default:
1799 {
1800 if (!ops->vidioc_default)
1801 break;
1802 ret = ops->vidioc_default(file, fh, cmd, arg);
1803 break;
1804 }
1805 } /* switch */
1806
1807 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1808 if (ret < 0) {
1809 v4l_print_ioctl(vfd->name, cmd);
1810 printk(KERN_CONT " error %ld\n", ret);
1811 }
1812 }
1813
1814 return ret;
1815}
1816
1817/* In some cases, only a few fields are used as input, i.e. when the app sets
1818 * "index" and then the driver fills in the rest of the structure for the thing
1819 * with that index. We only need to copy up the first non-input field. */
1820static unsigned long cmd_input_size(unsigned int cmd)
1821{
1822 /* Size of structure up to and including 'field' */
1823#define CMDINSIZE(cmd, type, field) \
1824 case VIDIOC_##cmd: \
1825 return offsetof(struct v4l2_##type, field) + \
1826 sizeof(((struct v4l2_##type *)0)->field);
1827
1828 switch (cmd) {
1829 CMDINSIZE(ENUM_FMT, fmtdesc, type);
1830 CMDINSIZE(G_FMT, format, type);
1831 CMDINSIZE(QUERYBUF, buffer, type);
1832 CMDINSIZE(G_PARM, streamparm, type);
1833 CMDINSIZE(ENUMSTD, standard, index);
1834 CMDINSIZE(ENUMINPUT, input, index);
1835 CMDINSIZE(G_CTRL, control, id);
1836 CMDINSIZE(G_TUNER, tuner, index);
1837 CMDINSIZE(QUERYCTRL, queryctrl, id);
1838 CMDINSIZE(QUERYMENU, querymenu, index);
1839 CMDINSIZE(ENUMOUTPUT, output, index);
1840 CMDINSIZE(G_MODULATOR, modulator, index);
1841 CMDINSIZE(G_FREQUENCY, frequency, tuner);
1842 CMDINSIZE(CROPCAP, cropcap, type);
1843 CMDINSIZE(G_CROP, crop, type);
1844 CMDINSIZE(ENUMAUDIO, audio, index);
1845 CMDINSIZE(ENUMAUDOUT, audioout, index);
1846 CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
1847 CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
1848 CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
1849 CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
1850 CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
1851 default:
1852 return _IOC_SIZE(cmd);
1853 }
1854}
1855
1856long video_ioctl2(struct file *file,
1857 unsigned int cmd, unsigned long arg)
1858{
1859 char sbuf[128];
1860 void *mbuf = NULL;
1861 void *parg = NULL;
1862 long err = -EINVAL;
1863 int is_ext_ctrl;
1864 size_t ctrls_size = 0;
1865 void __user *user_ptr = NULL;
1866
1867#ifdef __OLD_VIDIOC_
1868 cmd = video_fix_command(cmd);
1869#endif
1870 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1871 cmd == VIDIOC_TRY_EXT_CTRLS);
1872
1873 /* Copy arguments into temp kernel buffer */
1874 if (_IOC_DIR(cmd) != _IOC_NONE) {
1875 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1876 parg = sbuf;
1877 } else {
1878 /* too big to allocate from stack */
1879 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1880 if (NULL == mbuf)
1881 return -ENOMEM;
1882 parg = mbuf;
1883 }
1884
1885 err = -EFAULT;
1886 if (_IOC_DIR(cmd) & _IOC_WRITE) {
1887 unsigned long n = cmd_input_size(cmd);
1888
1889 if (copy_from_user(parg, (void __user *)arg, n))
1890 goto out;
1891
1892 /* zero out anything we don't copy from userspace */
1893 if (n < _IOC_SIZE(cmd))
1894 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
1895 } else {
1896 /* read-only ioctl */
1897 memset(parg, 0, _IOC_SIZE(cmd));
1898 }
1899 }
1900
1901 if (is_ext_ctrl) {
1902 struct v4l2_ext_controls *p = parg;
1903
1904 /* In case of an error, tell the caller that it wasn't
1905 a specific control that caused it. */
1906 p->error_idx = p->count;
1907 user_ptr = (void __user *)p->controls;
1908 if (p->count) {
1909 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1910 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1911 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1912 err = -ENOMEM;
1913 if (NULL == mbuf)
1914 goto out_ext_ctrl;
1915 err = -EFAULT;
1916 if (copy_from_user(mbuf, user_ptr, ctrls_size))
1917 goto out_ext_ctrl;
1918 p->controls = mbuf;
1919 }
1920 }
1921
1922 /* Handles IOCTL */
1923 err = __video_do_ioctl(file, cmd, parg);
1924 if (err == -ENOIOCTLCMD)
1925 err = -EINVAL;
1926 if (is_ext_ctrl) {
1927 struct v4l2_ext_controls *p = parg;
1928
1929 p->controls = (void *)user_ptr;
1930 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1931 err = -EFAULT;
1932 goto out_ext_ctrl;
1933 }
1934 if (err < 0)
1935 goto out;
1936
1937out_ext_ctrl:
1938 /* Copy results into user buffer */
1939 switch (_IOC_DIR(cmd)) {
1940 case _IOC_READ:
1941 case (_IOC_WRITE | _IOC_READ):
1942 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1943 err = -EFAULT;
1944 break;
1945 }
1946
1947out:
1948 kfree(mbuf);
1949 return err;
1950}
1951EXPORT_SYMBOL(video_ioctl2);