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 [_IOC_NR(VIDIOC_ENUM_DV_PRESETS)] = "VIDIOC_ENUM_DV_PRESETS",
288 [_IOC_NR(VIDIOC_S_DV_PRESET)] = "VIDIOC_S_DV_PRESET",
289 [_IOC_NR(VIDIOC_G_DV_PRESET)] = "VIDIOC_G_DV_PRESET",
290 [_IOC_NR(VIDIOC_QUERY_DV_PRESET)] = "VIDIOC_QUERY_DV_PRESET",
291 [_IOC_NR(VIDIOC_S_DV_TIMINGS)] = "VIDIOC_S_DV_TIMINGS",
292 [_IOC_NR(VIDIOC_G_DV_TIMINGS)] = "VIDIOC_G_DV_TIMINGS",
293};
294#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
295
296/* Common ioctl debug function. This function can be used by
297 external ioctl messages as well as internal V4L ioctl */
298void v4l_printk_ioctl(unsigned int cmd)
299{
300 char *dir, *type;
301
302 switch (_IOC_TYPE(cmd)) {
303 case 'd':
304 type = "v4l2_int";
305 break;
306#ifdef CONFIG_VIDEO_V4L1_COMPAT
307 case 'v':
308 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
309 type = "v4l1";
310 break;
311 }
312 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
313 return;
314#endif
315 case 'V':
316 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
317 type = "v4l2";
318 break;
319 }
320 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
321 return;
322 default:
323 type = "unknown";
324 }
325
326 switch (_IOC_DIR(cmd)) {
327 case _IOC_NONE: dir = "--"; break;
328 case _IOC_READ: dir = "r-"; break;
329 case _IOC_WRITE: dir = "-w"; break;
330 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
331 default: dir = "*ERR*"; break;
332 }
333 printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
334 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
335}
336EXPORT_SYMBOL(v4l_printk_ioctl);
337
338/*
339 * helper function -- handles userspace copying for ioctl arguments
340 */
341
342#ifdef __OLD_VIDIOC_
343static unsigned int
344video_fix_command(unsigned int cmd)
345{
346 switch (cmd) {
347 case VIDIOC_OVERLAY_OLD:
348 cmd = VIDIOC_OVERLAY;
349 break;
350 case VIDIOC_S_PARM_OLD:
351 cmd = VIDIOC_S_PARM;
352 break;
353 case VIDIOC_S_CTRL_OLD:
354 cmd = VIDIOC_S_CTRL;
355 break;
356 case VIDIOC_G_AUDIO_OLD:
357 cmd = VIDIOC_G_AUDIO;
358 break;
359 case VIDIOC_G_AUDOUT_OLD:
360 cmd = VIDIOC_G_AUDOUT;
361 break;
362 case VIDIOC_CROPCAP_OLD:
363 cmd = VIDIOC_CROPCAP;
364 break;
365 }
366 return cmd;
367}
368#endif
369
370/*
371 * Obsolete usercopy function - Should be removed soon
372 */
373long
374video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
375 v4l2_kioctl func)
376{
377 char sbuf[128];
378 void *mbuf = NULL;
379 void *parg = NULL;
380 long err = -EINVAL;
381 int is_ext_ctrl;
382 size_t ctrls_size = 0;
383 void __user *user_ptr = NULL;
384
385#ifdef __OLD_VIDIOC_
386 cmd = video_fix_command(cmd);
387#endif
388 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
389 cmd == VIDIOC_TRY_EXT_CTRLS);
390
391 /* Copy arguments into temp kernel buffer */
392 switch (_IOC_DIR(cmd)) {
393 case _IOC_NONE:
394 parg = NULL;
395 break;
396 case _IOC_READ:
397 case _IOC_WRITE:
398 case (_IOC_WRITE | _IOC_READ):
399 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
400 parg = sbuf;
401 } else {
402 /* too big to allocate from stack */
403 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
404 if (NULL == mbuf)
405 return -ENOMEM;
406 parg = mbuf;
407 }
408
409 err = -EFAULT;
410 if (_IOC_DIR(cmd) & _IOC_WRITE)
411 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
412 goto out;
413 break;
414 }
415 if (is_ext_ctrl) {
416 struct v4l2_ext_controls *p = parg;
417
418 /* In case of an error, tell the caller that it wasn't
419 a specific control that caused it. */
420 p->error_idx = p->count;
421 user_ptr = (void __user *)p->controls;
422 if (p->count) {
423 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
424 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
425 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
426 err = -ENOMEM;
427 if (NULL == mbuf)
428 goto out_ext_ctrl;
429 err = -EFAULT;
430 if (copy_from_user(mbuf, user_ptr, ctrls_size))
431 goto out_ext_ctrl;
432 p->controls = mbuf;
433 }
434 }
435
436 /* call driver */
437 err = func(file, cmd, parg);
438 if (err == -ENOIOCTLCMD)
439 err = -EINVAL;
440 if (is_ext_ctrl) {
441 struct v4l2_ext_controls *p = parg;
442
443 p->controls = (void *)user_ptr;
444 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
445 err = -EFAULT;
446 goto out_ext_ctrl;
447 }
448 if (err < 0)
449 goto out;
450
451out_ext_ctrl:
452 /* Copy results into user buffer */
453 switch (_IOC_DIR(cmd)) {
454 case _IOC_READ:
455 case (_IOC_WRITE | _IOC_READ):
456 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
457 err = -EFAULT;
458 break;
459 }
460
461out:
462 kfree(mbuf);
463 return err;
464}
465EXPORT_SYMBOL(video_usercopy);
466
467static void dbgbuf(unsigned int cmd, struct video_device *vfd,
468 struct v4l2_buffer *p)
469{
470 struct v4l2_timecode *tc = &p->timecode;
471
472 dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
473 "bytesused=%d, flags=0x%08d, "
474 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
475 p->timestamp.tv_sec / 3600,
476 (int)(p->timestamp.tv_sec / 60) % 60,
477 (int)(p->timestamp.tv_sec % 60),
478 (long)p->timestamp.tv_usec,
479 p->index,
480 prt_names(p->type, v4l2_type_names),
481 p->bytesused, p->flags,
482 p->field, p->sequence,
483 prt_names(p->memory, v4l2_memory_names),
484 p->m.userptr, p->length);
485 dbgarg2("timecode=%02d:%02d:%02d type=%d, "
486 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
487 tc->hours, tc->minutes, tc->seconds,
488 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
489}
490
491static inline void dbgrect(struct video_device *vfd, char *s,
492 struct v4l2_rect *r)
493{
494 dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
495 r->width, r->height);
496};
497
498static inline void v4l_print_pix_fmt(struct video_device *vfd,
499 struct v4l2_pix_format *fmt)
500{
501 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
502 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
503 fmt->width, fmt->height,
504 (fmt->pixelformat & 0xff),
505 (fmt->pixelformat >> 8) & 0xff,
506 (fmt->pixelformat >> 16) & 0xff,
507 (fmt->pixelformat >> 24) & 0xff,
508 prt_names(fmt->field, v4l2_field_names),
509 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
510};
511
512static inline void v4l_print_ext_ctrls(unsigned int cmd,
513 struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
514{
515 __u32 i;
516
517 if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
518 return;
519 dbgarg(cmd, "");
520 printk(KERN_CONT "class=0x%x", c->ctrl_class);
521 for (i = 0; i < c->count; i++) {
522 if (show_vals && !c->controls[i].size)
523 printk(KERN_CONT " id/val=0x%x/0x%x",
524 c->controls[i].id, c->controls[i].value);
525 else
526 printk(KERN_CONT " id=0x%x,size=%u",
527 c->controls[i].id, c->controls[i].size);
528 }
529 printk(KERN_CONT "\n");
530};
531
532static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
533{
534 __u32 i;
535
536 /* zero the reserved fields */
537 c->reserved[0] = c->reserved[1] = 0;
538 for (i = 0; i < c->count; i++)
539 c->controls[i].reserved2[0] = 0;
540
541 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
542 when using extended controls.
543 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
544 is it allowed for backwards compatibility.
545 */
546 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
547 return 0;
548 /* Check that all controls are from the same control class. */
549 for (i = 0; i < c->count; i++) {
550 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
551 c->error_idx = i;
552 return 0;
553 }
554 }
555 return 1;
556}
557
558static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
559{
560 if (ops == NULL)
561 return -EINVAL;
562
563 switch (type) {
564 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
565 if (ops->vidioc_g_fmt_vid_cap)
566 return 0;
567 break;
568 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
569 if (ops->vidioc_g_fmt_vid_overlay)
570 return 0;
571 break;
572 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
573 if (ops->vidioc_g_fmt_vid_out)
574 return 0;
575 break;
576 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
577 if (ops->vidioc_g_fmt_vid_out_overlay)
578 return 0;
579 break;
580 case V4L2_BUF_TYPE_VBI_CAPTURE:
581 if (ops->vidioc_g_fmt_vbi_cap)
582 return 0;
583 break;
584 case V4L2_BUF_TYPE_VBI_OUTPUT:
585 if (ops->vidioc_g_fmt_vbi_out)
586 return 0;
587 break;
588 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
589 if (ops->vidioc_g_fmt_sliced_vbi_cap)
590 return 0;
591 break;
592 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
593 if (ops->vidioc_g_fmt_sliced_vbi_out)
594 return 0;
595 break;
596 case V4L2_BUF_TYPE_PRIVATE:
597 if (ops->vidioc_g_fmt_type_private)
598 return 0;
599 break;
600 }
601 return -EINVAL;
602}
603
604static long __video_do_ioctl(struct file *file,
605 unsigned int cmd, void *arg)
606{
607 struct video_device *vfd = video_devdata(file);
608 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
609 void *fh = file->private_data;
610 long ret = -EINVAL;
611
612 if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
613 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
614 v4l_print_ioctl(vfd->name, cmd);
615 printk(KERN_CONT "\n");
616 }
617
618 if (ops == NULL) {
619 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
620 vfd->name);
621 return -EINVAL;
622 }
623
624#ifdef CONFIG_VIDEO_V4L1_COMPAT
625 /***********************************************************
626 Handles calls to the obsoleted V4L1 API
627 Due to the nature of VIDIOCGMBUF, each driver that supports
628 V4L1 should implement its own handler for this ioctl.
629 ***********************************************************/
630
631 /* --- streaming capture ------------------------------------- */
632 if (cmd == VIDIOCGMBUF) {
633 struct video_mbuf *p = arg;
634
635 if (!ops->vidiocgmbuf)
636 return ret;
637 ret = ops->vidiocgmbuf(file, fh, p);
638 if (!ret)
639 dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
640 p->size, p->frames,
641 (unsigned long)p->offsets);
642 return ret;
643 }
644
645 /********************************************************
646 All other V4L1 calls are handled by v4l1_compat module.
647 Those calls will be translated into V4L2 calls, and
648 __video_do_ioctl will be called again, with one or more
649 V4L2 ioctls.
650 ********************************************************/
651 if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
652 return v4l_compat_translate_ioctl(file, cmd, arg,
653 __video_do_ioctl);
654#endif
655
656 switch (cmd) {
657 /* --- capabilities ------------------------------------------ */
658 case VIDIOC_QUERYCAP:
659 {
660 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
661
662 if (!ops->vidioc_querycap)
663 break;
664
665 ret = ops->vidioc_querycap(file, fh, cap);
666 if (!ret)
667 dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
668 "version=0x%08x, "
669 "capabilities=0x%08x\n",
670 cap->driver, cap->card, cap->bus_info,
671 cap->version,
672 cap->capabilities);
673 break;
674 }
675
676 /* --- priority ------------------------------------------ */
677 case VIDIOC_G_PRIORITY:
678 {
679 enum v4l2_priority *p = arg;
680
681 if (!ops->vidioc_g_priority)
682 break;
683 ret = ops->vidioc_g_priority(file, fh, p);
684 if (!ret)
685 dbgarg(cmd, "priority is %d\n", *p);
686 break;
687 }
688 case VIDIOC_S_PRIORITY:
689 {
690 enum v4l2_priority *p = arg;
691
692 if (!ops->vidioc_s_priority)
693 break;
694 dbgarg(cmd, "setting priority to %d\n", *p);
695 ret = ops->vidioc_s_priority(file, fh, *p);
696 break;
697 }
698
699 /* --- capture ioctls ---------------------------------------- */
700 case VIDIOC_ENUM_FMT:
701 {
702 struct v4l2_fmtdesc *f = arg;
703
704 switch (f->type) {
705 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
706 if (ops->vidioc_enum_fmt_vid_cap)
707 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
708 break;
709 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
710 if (ops->vidioc_enum_fmt_vid_overlay)
711 ret = ops->vidioc_enum_fmt_vid_overlay(file,
712 fh, f);
713 break;
714 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
715 if (ops->vidioc_enum_fmt_vid_out)
716 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
717 break;
718 case V4L2_BUF_TYPE_PRIVATE:
719 if (ops->vidioc_enum_fmt_type_private)
720 ret = ops->vidioc_enum_fmt_type_private(file,
721 fh, f);
722 break;
723 default:
724 break;
725 }
726 if (!ret)
727 dbgarg(cmd, "index=%d, type=%d, flags=%d, "
728 "pixelformat=%c%c%c%c, description='%s'\n",
729 f->index, f->type, f->flags,
730 (f->pixelformat & 0xff),
731 (f->pixelformat >> 8) & 0xff,
732 (f->pixelformat >> 16) & 0xff,
733 (f->pixelformat >> 24) & 0xff,
734 f->description);
735 break;
736 }
737 case VIDIOC_G_FMT:
738 {
739 struct v4l2_format *f = (struct v4l2_format *)arg;
740
741 /* FIXME: Should be one dump per type */
742 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
743
744 switch (f->type) {
745 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
746 if (ops->vidioc_g_fmt_vid_cap)
747 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
748 if (!ret)
749 v4l_print_pix_fmt(vfd, &f->fmt.pix);
750 break;
751 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
752 if (ops->vidioc_g_fmt_vid_overlay)
753 ret = ops->vidioc_g_fmt_vid_overlay(file,
754 fh, f);
755 break;
756 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
757 if (ops->vidioc_g_fmt_vid_out)
758 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
759 if (!ret)
760 v4l_print_pix_fmt(vfd, &f->fmt.pix);
761 break;
762 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
763 if (ops->vidioc_g_fmt_vid_out_overlay)
764 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
765 fh, f);
766 break;
767 case V4L2_BUF_TYPE_VBI_CAPTURE:
768 if (ops->vidioc_g_fmt_vbi_cap)
769 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
770 break;
771 case V4L2_BUF_TYPE_VBI_OUTPUT:
772 if (ops->vidioc_g_fmt_vbi_out)
773 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
774 break;
775 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
776 if (ops->vidioc_g_fmt_sliced_vbi_cap)
777 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
778 fh, f);
779 break;
780 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
781 if (ops->vidioc_g_fmt_sliced_vbi_out)
782 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
783 fh, f);
784 break;
785 case V4L2_BUF_TYPE_PRIVATE:
786 if (ops->vidioc_g_fmt_type_private)
787 ret = ops->vidioc_g_fmt_type_private(file,
788 fh, f);
789 break;
790 }
791
792 break;
793 }
794 case VIDIOC_S_FMT:
795 {
796 struct v4l2_format *f = (struct v4l2_format *)arg;
797
798 /* FIXME: Should be one dump per type */
799 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
800
801 switch (f->type) {
802 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
803 CLEAR_AFTER_FIELD(f, fmt.pix);
804 v4l_print_pix_fmt(vfd, &f->fmt.pix);
805 if (ops->vidioc_s_fmt_vid_cap)
806 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
807 break;
808 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
809 CLEAR_AFTER_FIELD(f, fmt.win);
810 if (ops->vidioc_s_fmt_vid_overlay)
811 ret = ops->vidioc_s_fmt_vid_overlay(file,
812 fh, f);
813 break;
814 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
815 CLEAR_AFTER_FIELD(f, fmt.pix);
816 v4l_print_pix_fmt(vfd, &f->fmt.pix);
817 if (ops->vidioc_s_fmt_vid_out)
818 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
819 break;
820 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
821 CLEAR_AFTER_FIELD(f, fmt.win);
822 if (ops->vidioc_s_fmt_vid_out_overlay)
823 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
824 fh, f);
825 break;
826 case V4L2_BUF_TYPE_VBI_CAPTURE:
827 CLEAR_AFTER_FIELD(f, fmt.vbi);
828 if (ops->vidioc_s_fmt_vbi_cap)
829 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
830 break;
831 case V4L2_BUF_TYPE_VBI_OUTPUT:
832 CLEAR_AFTER_FIELD(f, fmt.vbi);
833 if (ops->vidioc_s_fmt_vbi_out)
834 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
835 break;
836 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
837 CLEAR_AFTER_FIELD(f, fmt.sliced);
838 if (ops->vidioc_s_fmt_sliced_vbi_cap)
839 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
840 fh, f);
841 break;
842 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
843 CLEAR_AFTER_FIELD(f, fmt.sliced);
844 if (ops->vidioc_s_fmt_sliced_vbi_out)
845 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
846 fh, f);
847 break;
848 case V4L2_BUF_TYPE_PRIVATE:
849 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
850 if (ops->vidioc_s_fmt_type_private)
851 ret = ops->vidioc_s_fmt_type_private(file,
852 fh, f);
853 break;
854 }
855 break;
856 }
857 case VIDIOC_TRY_FMT:
858 {
859 struct v4l2_format *f = (struct v4l2_format *)arg;
860
861 /* FIXME: Should be one dump per type */
862 dbgarg(cmd, "type=%s\n", prt_names(f->type,
863 v4l2_type_names));
864 switch (f->type) {
865 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
866 CLEAR_AFTER_FIELD(f, fmt.pix);
867 if (ops->vidioc_try_fmt_vid_cap)
868 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
869 if (!ret)
870 v4l_print_pix_fmt(vfd, &f->fmt.pix);
871 break;
872 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
873 CLEAR_AFTER_FIELD(f, fmt.win);
874 if (ops->vidioc_try_fmt_vid_overlay)
875 ret = ops->vidioc_try_fmt_vid_overlay(file,
876 fh, f);
877 break;
878 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
879 CLEAR_AFTER_FIELD(f, fmt.pix);
880 if (ops->vidioc_try_fmt_vid_out)
881 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
882 if (!ret)
883 v4l_print_pix_fmt(vfd, &f->fmt.pix);
884 break;
885 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
886 CLEAR_AFTER_FIELD(f, fmt.win);
887 if (ops->vidioc_try_fmt_vid_out_overlay)
888 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
889 fh, f);
890 break;
891 case V4L2_BUF_TYPE_VBI_CAPTURE:
892 CLEAR_AFTER_FIELD(f, fmt.vbi);
893 if (ops->vidioc_try_fmt_vbi_cap)
894 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
895 break;
896 case V4L2_BUF_TYPE_VBI_OUTPUT:
897 CLEAR_AFTER_FIELD(f, fmt.vbi);
898 if (ops->vidioc_try_fmt_vbi_out)
899 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
900 break;
901 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
902 CLEAR_AFTER_FIELD(f, fmt.sliced);
903 if (ops->vidioc_try_fmt_sliced_vbi_cap)
904 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
905 fh, f);
906 break;
907 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
908 CLEAR_AFTER_FIELD(f, fmt.sliced);
909 if (ops->vidioc_try_fmt_sliced_vbi_out)
910 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
911 fh, f);
912 break;
913 case V4L2_BUF_TYPE_PRIVATE:
914 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
915 if (ops->vidioc_try_fmt_type_private)
916 ret = ops->vidioc_try_fmt_type_private(file,
917 fh, f);
918 break;
919 }
920
921 break;
922 }
923 /* FIXME: Those buf reqs could be handled here,
924 with some changes on videobuf to allow its header to be included at
925 videodev2.h or being merged at videodev2.
926 */
927 case VIDIOC_REQBUFS:
928 {
929 struct v4l2_requestbuffers *p = arg;
930
931 if (!ops->vidioc_reqbufs)
932 break;
933 ret = check_fmt(ops, p->type);
934 if (ret)
935 break;
936
937 if (p->type < V4L2_BUF_TYPE_PRIVATE)
938 CLEAR_AFTER_FIELD(p, memory);
939
940 ret = ops->vidioc_reqbufs(file, fh, p);
941 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
942 p->count,
943 prt_names(p->type, v4l2_type_names),
944 prt_names(p->memory, v4l2_memory_names));
945 break;
946 }
947 case VIDIOC_QUERYBUF:
948 {
949 struct v4l2_buffer *p = arg;
950
951 if (!ops->vidioc_querybuf)
952 break;
953 ret = check_fmt(ops, p->type);
954 if (ret)
955 break;
956
957 ret = ops->vidioc_querybuf(file, fh, p);
958 if (!ret)
959 dbgbuf(cmd, vfd, p);
960 break;
961 }
962 case VIDIOC_QBUF:
963 {
964 struct v4l2_buffer *p = arg;
965
966 if (!ops->vidioc_qbuf)
967 break;
968 ret = check_fmt(ops, p->type);
969 if (ret)
970 break;
971
972 ret = ops->vidioc_qbuf(file, fh, p);
973 if (!ret)
974 dbgbuf(cmd, vfd, p);
975 break;
976 }
977 case VIDIOC_DQBUF:
978 {
979 struct v4l2_buffer *p = arg;
980
981 if (!ops->vidioc_dqbuf)
982 break;
983 ret = check_fmt(ops, p->type);
984 if (ret)
985 break;
986
987 ret = ops->vidioc_dqbuf(file, fh, p);
988 if (!ret)
989 dbgbuf(cmd, vfd, p);
990 break;
991 }
992 case VIDIOC_OVERLAY:
993 {
994 int *i = arg;
995
996 if (!ops->vidioc_overlay)
997 break;
998 dbgarg(cmd, "value=%d\n", *i);
999 ret = ops->vidioc_overlay(file, fh, *i);
1000 break;
1001 }
1002 case VIDIOC_G_FBUF:
1003 {
1004 struct v4l2_framebuffer *p = arg;
1005
1006 if (!ops->vidioc_g_fbuf)
1007 break;
1008 ret = ops->vidioc_g_fbuf(file, fh, arg);
1009 if (!ret) {
1010 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1011 p->capability, p->flags,
1012 (unsigned long)p->base);
1013 v4l_print_pix_fmt(vfd, &p->fmt);
1014 }
1015 break;
1016 }
1017 case VIDIOC_S_FBUF:
1018 {
1019 struct v4l2_framebuffer *p = arg;
1020
1021 if (!ops->vidioc_s_fbuf)
1022 break;
1023 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1024 p->capability, p->flags, (unsigned long)p->base);
1025 v4l_print_pix_fmt(vfd, &p->fmt);
1026 ret = ops->vidioc_s_fbuf(file, fh, arg);
1027 break;
1028 }
1029 case VIDIOC_STREAMON:
1030 {
1031 enum v4l2_buf_type i = *(int *)arg;
1032
1033 if (!ops->vidioc_streamon)
1034 break;
1035 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1036 ret = ops->vidioc_streamon(file, fh, i);
1037 break;
1038 }
1039 case VIDIOC_STREAMOFF:
1040 {
1041 enum v4l2_buf_type i = *(int *)arg;
1042
1043 if (!ops->vidioc_streamoff)
1044 break;
1045 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1046 ret = ops->vidioc_streamoff(file, fh, i);
1047 break;
1048 }
1049 /* ---------- tv norms ---------- */
1050 case VIDIOC_ENUMSTD:
1051 {
1052 struct v4l2_standard *p = arg;
1053 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1054 unsigned int index = p->index, i, j = 0;
1055 const char *descr = "";
1056
1057 /* Return norm array in a canonical way */
1058 for (i = 0; i <= index && id; i++) {
1059 /* last std value in the standards array is 0, so this
1060 while always ends there since (id & 0) == 0. */
1061 while ((id & standards[j].std) != standards[j].std)
1062 j++;
1063 curr_id = standards[j].std;
1064 descr = standards[j].descr;
1065 j++;
1066 if (curr_id == 0)
1067 break;
1068 if (curr_id != V4L2_STD_PAL &&
1069 curr_id != V4L2_STD_SECAM &&
1070 curr_id != V4L2_STD_NTSC)
1071 id &= ~curr_id;
1072 }
1073 if (i <= index)
1074 return -EINVAL;
1075
1076 v4l2_video_std_construct(p, curr_id, descr);
1077
1078 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1079 "framelines=%d\n", p->index,
1080 (unsigned long long)p->id, p->name,
1081 p->frameperiod.numerator,
1082 p->frameperiod.denominator,
1083 p->framelines);
1084
1085 ret = 0;
1086 break;
1087 }
1088 case VIDIOC_G_STD:
1089 {
1090 v4l2_std_id *id = arg;
1091
1092 ret = 0;
1093 /* Calls the specific handler */
1094 if (ops->vidioc_g_std)
1095 ret = ops->vidioc_g_std(file, fh, id);
1096 else if (vfd->current_norm)
1097 *id = vfd->current_norm;
1098 else
1099 ret = -EINVAL;
1100
1101 if (!ret)
1102 dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1103 break;
1104 }
1105 case VIDIOC_S_STD:
1106 {
1107 v4l2_std_id *id = arg, norm;
1108
1109 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1110
1111 norm = (*id) & vfd->tvnorms;
1112 if (vfd->tvnorms && !norm) /* Check if std is supported */
1113 break;
1114
1115 /* Calls the specific handler */
1116 if (ops->vidioc_s_std)
1117 ret = ops->vidioc_s_std(file, fh, &norm);
1118 else
1119 ret = -EINVAL;
1120
1121 /* Updates standard information */
1122 if (ret >= 0)
1123 vfd->current_norm = norm;
1124 break;
1125 }
1126 case VIDIOC_QUERYSTD:
1127 {
1128 v4l2_std_id *p = arg;
1129
1130 if (!ops->vidioc_querystd)
1131 break;
1132 ret = ops->vidioc_querystd(file, fh, arg);
1133 if (!ret)
1134 dbgarg(cmd, "detected std=%08Lx\n",
1135 (unsigned long long)*p);
1136 break;
1137 }
1138 /* ------ input switching ---------- */
1139 /* FIXME: Inputs can be handled inside videodev2 */
1140 case VIDIOC_ENUMINPUT:
1141 {
1142 struct v4l2_input *p = arg;
1143
1144 /*
1145 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1146 * CAP_STD here based on ioctl handler provided by the
1147 * driver. If the driver doesn't support these
1148 * for a specific input, it must override these flags.
1149 */
1150 if (ops->vidioc_s_std)
1151 p->capabilities |= V4L2_IN_CAP_STD;
1152 if (ops->vidioc_s_dv_preset)
1153 p->capabilities |= V4L2_IN_CAP_PRESETS;
1154 if (ops->vidioc_s_dv_timings)
1155 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1156
1157 if (!ops->vidioc_enum_input)
1158 break;
1159
1160 ret = ops->vidioc_enum_input(file, fh, p);
1161 if (!ret)
1162 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1163 "audioset=%d, "
1164 "tuner=%d, std=%08Lx, status=%d\n",
1165 p->index, p->name, p->type, p->audioset,
1166 p->tuner,
1167 (unsigned long long)p->std,
1168 p->status);
1169 break;
1170 }
1171 case VIDIOC_G_INPUT:
1172 {
1173 unsigned int *i = arg;
1174
1175 if (!ops->vidioc_g_input)
1176 break;
1177 ret = ops->vidioc_g_input(file, fh, i);
1178 if (!ret)
1179 dbgarg(cmd, "value=%d\n", *i);
1180 break;
1181 }
1182 case VIDIOC_S_INPUT:
1183 {
1184 unsigned int *i = arg;
1185
1186 if (!ops->vidioc_s_input)
1187 break;
1188 dbgarg(cmd, "value=%d\n", *i);
1189 ret = ops->vidioc_s_input(file, fh, *i);
1190 break;
1191 }
1192
1193 /* ------ output switching ---------- */
1194 case VIDIOC_ENUMOUTPUT:
1195 {
1196 struct v4l2_output *p = arg;
1197
1198 if (!ops->vidioc_enum_output)
1199 break;
1200
1201 /*
1202 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1203 * CAP_STD here based on ioctl handler provided by the
1204 * driver. If the driver doesn't support these
1205 * for a specific output, it must override these flags.
1206 */
1207 if (ops->vidioc_s_std)
1208 p->capabilities |= V4L2_OUT_CAP_STD;
1209 if (ops->vidioc_s_dv_preset)
1210 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1211 if (ops->vidioc_s_dv_timings)
1212 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1213
1214 ret = ops->vidioc_enum_output(file, fh, p);
1215 if (!ret)
1216 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1217 "audioset=0x%x, "
1218 "modulator=%d, std=0x%08Lx\n",
1219 p->index, p->name, p->type, p->audioset,
1220 p->modulator, (unsigned long long)p->std);
1221 break;
1222 }
1223 case VIDIOC_G_OUTPUT:
1224 {
1225 unsigned int *i = arg;
1226
1227 if (!ops->vidioc_g_output)
1228 break;
1229 ret = ops->vidioc_g_output(file, fh, i);
1230 if (!ret)
1231 dbgarg(cmd, "value=%d\n", *i);
1232 break;
1233 }
1234 case VIDIOC_S_OUTPUT:
1235 {
1236 unsigned int *i = arg;
1237
1238 if (!ops->vidioc_s_output)
1239 break;
1240 dbgarg(cmd, "value=%d\n", *i);
1241 ret = ops->vidioc_s_output(file, fh, *i);
1242 break;
1243 }
1244
1245 /* --- controls ---------------------------------------------- */
1246 case VIDIOC_QUERYCTRL:
1247 {
1248 struct v4l2_queryctrl *p = arg;
1249
1250 if (!ops->vidioc_queryctrl)
1251 break;
1252 ret = ops->vidioc_queryctrl(file, fh, p);
1253 if (!ret)
1254 dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1255 "step=%d, default=%d, flags=0x%08x\n",
1256 p->id, p->type, p->name,
1257 p->minimum, p->maximum,
1258 p->step, p->default_value, p->flags);
1259 else
1260 dbgarg(cmd, "id=0x%x\n", p->id);
1261 break;
1262 }
1263 case VIDIOC_G_CTRL:
1264 {
1265 struct v4l2_control *p = arg;
1266
1267 if (ops->vidioc_g_ctrl)
1268 ret = ops->vidioc_g_ctrl(file, fh, p);
1269 else if (ops->vidioc_g_ext_ctrls) {
1270 struct v4l2_ext_controls ctrls;
1271 struct v4l2_ext_control ctrl;
1272
1273 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1274 ctrls.count = 1;
1275 ctrls.controls = &ctrl;
1276 ctrl.id = p->id;
1277 ctrl.value = p->value;
1278 if (check_ext_ctrls(&ctrls, 1)) {
1279 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1280 if (ret == 0)
1281 p->value = ctrl.value;
1282 }
1283 } else
1284 break;
1285 if (!ret)
1286 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1287 else
1288 dbgarg(cmd, "id=0x%x\n", p->id);
1289 break;
1290 }
1291 case VIDIOC_S_CTRL:
1292 {
1293 struct v4l2_control *p = arg;
1294 struct v4l2_ext_controls ctrls;
1295 struct v4l2_ext_control ctrl;
1296
1297 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1298 break;
1299
1300 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1301
1302 if (ops->vidioc_s_ctrl) {
1303 ret = ops->vidioc_s_ctrl(file, fh, p);
1304 break;
1305 }
1306 if (!ops->vidioc_s_ext_ctrls)
1307 break;
1308
1309 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1310 ctrls.count = 1;
1311 ctrls.controls = &ctrl;
1312 ctrl.id = p->id;
1313 ctrl.value = p->value;
1314 if (check_ext_ctrls(&ctrls, 1))
1315 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1316 break;
1317 }
1318 case VIDIOC_G_EXT_CTRLS:
1319 {
1320 struct v4l2_ext_controls *p = arg;
1321
1322 p->error_idx = p->count;
1323 if (!ops->vidioc_g_ext_ctrls)
1324 break;
1325 if (check_ext_ctrls(p, 0))
1326 ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1327 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1328 break;
1329 }
1330 case VIDIOC_S_EXT_CTRLS:
1331 {
1332 struct v4l2_ext_controls *p = arg;
1333
1334 p->error_idx = p->count;
1335 if (!ops->vidioc_s_ext_ctrls)
1336 break;
1337 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1338 if (check_ext_ctrls(p, 0))
1339 ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1340 break;
1341 }
1342 case VIDIOC_TRY_EXT_CTRLS:
1343 {
1344 struct v4l2_ext_controls *p = arg;
1345
1346 p->error_idx = p->count;
1347 if (!ops->vidioc_try_ext_ctrls)
1348 break;
1349 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1350 if (check_ext_ctrls(p, 0))
1351 ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1352 break;
1353 }
1354 case VIDIOC_QUERYMENU:
1355 {
1356 struct v4l2_querymenu *p = arg;
1357
1358 if (!ops->vidioc_querymenu)
1359 break;
1360 ret = ops->vidioc_querymenu(file, fh, p);
1361 if (!ret)
1362 dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1363 p->id, p->index, p->name);
1364 else
1365 dbgarg(cmd, "id=0x%x, index=%d\n",
1366 p->id, p->index);
1367 break;
1368 }
1369 /* --- audio ---------------------------------------------- */
1370 case VIDIOC_ENUMAUDIO:
1371 {
1372 struct v4l2_audio *p = arg;
1373
1374 if (!ops->vidioc_enumaudio)
1375 break;
1376 ret = ops->vidioc_enumaudio(file, fh, p);
1377 if (!ret)
1378 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1379 "mode=0x%x\n", p->index, p->name,
1380 p->capability, p->mode);
1381 else
1382 dbgarg(cmd, "index=%d\n", p->index);
1383 break;
1384 }
1385 case VIDIOC_G_AUDIO:
1386 {
1387 struct v4l2_audio *p = arg;
1388
1389 if (!ops->vidioc_g_audio)
1390 break;
1391
1392 ret = ops->vidioc_g_audio(file, fh, p);
1393 if (!ret)
1394 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1395 "mode=0x%x\n", p->index,
1396 p->name, p->capability, p->mode);
1397 else
1398 dbgarg(cmd, "index=%d\n", p->index);
1399 break;
1400 }
1401 case VIDIOC_S_AUDIO:
1402 {
1403 struct v4l2_audio *p = arg;
1404
1405 if (!ops->vidioc_s_audio)
1406 break;
1407 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1408 "mode=0x%x\n", p->index, p->name,
1409 p->capability, p->mode);
1410 ret = ops->vidioc_s_audio(file, fh, p);
1411 break;
1412 }
1413 case VIDIOC_ENUMAUDOUT:
1414 {
1415 struct v4l2_audioout *p = arg;
1416
1417 if (!ops->vidioc_enumaudout)
1418 break;
1419 dbgarg(cmd, "Enum for index=%d\n", p->index);
1420 ret = ops->vidioc_enumaudout(file, fh, p);
1421 if (!ret)
1422 dbgarg2("index=%d, name=%s, capability=%d, "
1423 "mode=%d\n", p->index, p->name,
1424 p->capability, p->mode);
1425 break;
1426 }
1427 case VIDIOC_G_AUDOUT:
1428 {
1429 struct v4l2_audioout *p = arg;
1430
1431 if (!ops->vidioc_g_audout)
1432 break;
1433
1434 ret = ops->vidioc_g_audout(file, fh, p);
1435 if (!ret)
1436 dbgarg2("index=%d, name=%s, capability=%d, "
1437 "mode=%d\n", p->index, p->name,
1438 p->capability, p->mode);
1439 break;
1440 }
1441 case VIDIOC_S_AUDOUT:
1442 {
1443 struct v4l2_audioout *p = arg;
1444
1445 if (!ops->vidioc_s_audout)
1446 break;
1447 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1448 "mode=%d\n", p->index, p->name,
1449 p->capability, p->mode);
1450
1451 ret = ops->vidioc_s_audout(file, fh, p);
1452 break;
1453 }
1454 case VIDIOC_G_MODULATOR:
1455 {
1456 struct v4l2_modulator *p = arg;
1457
1458 if (!ops->vidioc_g_modulator)
1459 break;
1460 ret = ops->vidioc_g_modulator(file, fh, p);
1461 if (!ret)
1462 dbgarg(cmd, "index=%d, name=%s, "
1463 "capability=%d, rangelow=%d,"
1464 " rangehigh=%d, txsubchans=%d\n",
1465 p->index, p->name, p->capability,
1466 p->rangelow, p->rangehigh,
1467 p->txsubchans);
1468 break;
1469 }
1470 case VIDIOC_S_MODULATOR:
1471 {
1472 struct v4l2_modulator *p = arg;
1473
1474 if (!ops->vidioc_s_modulator)
1475 break;
1476 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1477 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1478 p->index, p->name, p->capability, p->rangelow,
1479 p->rangehigh, p->txsubchans);
1480 ret = ops->vidioc_s_modulator(file, fh, p);
1481 break;
1482 }
1483 case VIDIOC_G_CROP:
1484 {
1485 struct v4l2_crop *p = arg;
1486
1487 if (!ops->vidioc_g_crop)
1488 break;
1489
1490 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1491 ret = ops->vidioc_g_crop(file, fh, p);
1492 if (!ret)
1493 dbgrect(vfd, "", &p->c);
1494 break;
1495 }
1496 case VIDIOC_S_CROP:
1497 {
1498 struct v4l2_crop *p = arg;
1499
1500 if (!ops->vidioc_s_crop)
1501 break;
1502 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1503 dbgrect(vfd, "", &p->c);
1504 ret = ops->vidioc_s_crop(file, fh, p);
1505 break;
1506 }
1507 case VIDIOC_CROPCAP:
1508 {
1509 struct v4l2_cropcap *p = arg;
1510
1511 /*FIXME: Should also show v4l2_fract pixelaspect */
1512 if (!ops->vidioc_cropcap)
1513 break;
1514
1515 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1516 ret = ops->vidioc_cropcap(file, fh, p);
1517 if (!ret) {
1518 dbgrect(vfd, "bounds ", &p->bounds);
1519 dbgrect(vfd, "defrect ", &p->defrect);
1520 }
1521 break;
1522 }
1523 case VIDIOC_G_JPEGCOMP:
1524 {
1525 struct v4l2_jpegcompression *p = arg;
1526
1527 if (!ops->vidioc_g_jpegcomp)
1528 break;
1529
1530 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1531 if (!ret)
1532 dbgarg(cmd, "quality=%d, APPn=%d, "
1533 "APP_len=%d, COM_len=%d, "
1534 "jpeg_markers=%d\n",
1535 p->quality, p->APPn, p->APP_len,
1536 p->COM_len, p->jpeg_markers);
1537 break;
1538 }
1539 case VIDIOC_S_JPEGCOMP:
1540 {
1541 struct v4l2_jpegcompression *p = arg;
1542
1543 if (!ops->vidioc_g_jpegcomp)
1544 break;
1545 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1546 "COM_len=%d, jpeg_markers=%d\n",
1547 p->quality, p->APPn, p->APP_len,
1548 p->COM_len, p->jpeg_markers);
1549 ret = ops->vidioc_s_jpegcomp(file, fh, p);
1550 break;
1551 }
1552 case VIDIOC_G_ENC_INDEX:
1553 {
1554 struct v4l2_enc_idx *p = arg;
1555
1556 if (!ops->vidioc_g_enc_index)
1557 break;
1558 ret = ops->vidioc_g_enc_index(file, fh, p);
1559 if (!ret)
1560 dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1561 p->entries, p->entries_cap);
1562 break;
1563 }
1564 case VIDIOC_ENCODER_CMD:
1565 {
1566 struct v4l2_encoder_cmd *p = arg;
1567
1568 if (!ops->vidioc_encoder_cmd)
1569 break;
1570 ret = ops->vidioc_encoder_cmd(file, fh, p);
1571 if (!ret)
1572 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1573 break;
1574 }
1575 case VIDIOC_TRY_ENCODER_CMD:
1576 {
1577 struct v4l2_encoder_cmd *p = arg;
1578
1579 if (!ops->vidioc_try_encoder_cmd)
1580 break;
1581 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1582 if (!ret)
1583 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1584 break;
1585 }
1586 case VIDIOC_G_PARM:
1587 {
1588 struct v4l2_streamparm *p = arg;
1589
1590 if (ops->vidioc_g_parm) {
1591 ret = check_fmt(ops, p->type);
1592 if (ret)
1593 break;
1594 ret = ops->vidioc_g_parm(file, fh, p);
1595 } else {
1596 v4l2_std_id std = vfd->current_norm;
1597
1598 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1599 return -EINVAL;
1600
1601 ret = 0;
1602 if (ops->vidioc_g_std)
1603 ret = ops->vidioc_g_std(file, fh, &std);
1604 else if (std == 0)
1605 ret = -EINVAL;
1606 if (ret == 0)
1607 v4l2_video_std_frame_period(std,
1608 &p->parm.capture.timeperframe);
1609 }
1610
1611 dbgarg(cmd, "type=%d\n", p->type);
1612 break;
1613 }
1614 case VIDIOC_S_PARM:
1615 {
1616 struct v4l2_streamparm *p = arg;
1617
1618 if (!ops->vidioc_s_parm)
1619 break;
1620 ret = check_fmt(ops, p->type);
1621 if (ret)
1622 break;
1623
1624 dbgarg(cmd, "type=%d\n", p->type);
1625 ret = ops->vidioc_s_parm(file, fh, p);
1626 break;
1627 }
1628 case VIDIOC_G_TUNER:
1629 {
1630 struct v4l2_tuner *p = arg;
1631
1632 if (!ops->vidioc_g_tuner)
1633 break;
1634
1635 ret = ops->vidioc_g_tuner(file, fh, p);
1636 if (!ret)
1637 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1638 "capability=0x%x, rangelow=%d, "
1639 "rangehigh=%d, signal=%d, afc=%d, "
1640 "rxsubchans=0x%x, audmode=%d\n",
1641 p->index, p->name, p->type,
1642 p->capability, p->rangelow,
1643 p->rangehigh, p->signal, p->afc,
1644 p->rxsubchans, p->audmode);
1645 break;
1646 }
1647 case VIDIOC_S_TUNER:
1648 {
1649 struct v4l2_tuner *p = arg;
1650
1651 if (!ops->vidioc_s_tuner)
1652 break;
1653 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1654 "capability=0x%x, rangelow=%d, "
1655 "rangehigh=%d, signal=%d, afc=%d, "
1656 "rxsubchans=0x%x, audmode=%d\n",
1657 p->index, p->name, p->type,
1658 p->capability, p->rangelow,
1659 p->rangehigh, p->signal, p->afc,
1660 p->rxsubchans, p->audmode);
1661 ret = ops->vidioc_s_tuner(file, fh, p);
1662 break;
1663 }
1664 case VIDIOC_G_FREQUENCY:
1665 {
1666 struct v4l2_frequency *p = arg;
1667
1668 if (!ops->vidioc_g_frequency)
1669 break;
1670
1671 ret = ops->vidioc_g_frequency(file, fh, p);
1672 if (!ret)
1673 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1674 p->tuner, p->type, p->frequency);
1675 break;
1676 }
1677 case VIDIOC_S_FREQUENCY:
1678 {
1679 struct v4l2_frequency *p = arg;
1680
1681 if (!ops->vidioc_s_frequency)
1682 break;
1683 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1684 p->tuner, p->type, p->frequency);
1685 ret = ops->vidioc_s_frequency(file, fh, p);
1686 break;
1687 }
1688 case VIDIOC_G_SLICED_VBI_CAP:
1689 {
1690 struct v4l2_sliced_vbi_cap *p = arg;
1691
1692 if (!ops->vidioc_g_sliced_vbi_cap)
1693 break;
1694
1695 /* Clear up to type, everything after type is zerod already */
1696 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1697
1698 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1699 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1700 if (!ret)
1701 dbgarg2("service_set=%d\n", p->service_set);
1702 break;
1703 }
1704 case VIDIOC_LOG_STATUS:
1705 {
1706 if (!ops->vidioc_log_status)
1707 break;
1708 ret = ops->vidioc_log_status(file, fh);
1709 break;
1710 }
1711#ifdef CONFIG_VIDEO_ADV_DEBUG
1712 case VIDIOC_DBG_G_REGISTER:
1713 {
1714 struct v4l2_dbg_register *p = arg;
1715
1716 if (!capable(CAP_SYS_ADMIN))
1717 ret = -EPERM;
1718 else if (ops->vidioc_g_register)
1719 ret = ops->vidioc_g_register(file, fh, p);
1720 break;
1721 }
1722 case VIDIOC_DBG_S_REGISTER:
1723 {
1724 struct v4l2_dbg_register *p = arg;
1725
1726 if (!capable(CAP_SYS_ADMIN))
1727 ret = -EPERM;
1728 else if (ops->vidioc_s_register)
1729 ret = ops->vidioc_s_register(file, fh, p);
1730 break;
1731 }
1732#endif
1733 case VIDIOC_DBG_G_CHIP_IDENT:
1734 {
1735 struct v4l2_dbg_chip_ident *p = arg;
1736
1737 if (!ops->vidioc_g_chip_ident)
1738 break;
1739 p->ident = V4L2_IDENT_NONE;
1740 p->revision = 0;
1741 ret = ops->vidioc_g_chip_ident(file, fh, p);
1742 if (!ret)
1743 dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1744 break;
1745 }
1746 case VIDIOC_S_HW_FREQ_SEEK:
1747 {
1748 struct v4l2_hw_freq_seek *p = arg;
1749
1750 if (!ops->vidioc_s_hw_freq_seek)
1751 break;
1752 dbgarg(cmd,
1753 "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1754 p->tuner, p->type, p->seek_upward, p->wrap_around);
1755 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1756 break;
1757 }
1758 case VIDIOC_ENUM_FRAMESIZES:
1759 {
1760 struct v4l2_frmsizeenum *p = arg;
1761
1762 if (!ops->vidioc_enum_framesizes)
1763 break;
1764
1765 ret = ops->vidioc_enum_framesizes(file, fh, p);
1766 dbgarg(cmd,
1767 "index=%d, pixelformat=%c%c%c%c, type=%d ",
1768 p->index,
1769 (p->pixel_format & 0xff),
1770 (p->pixel_format >> 8) & 0xff,
1771 (p->pixel_format >> 16) & 0xff,
1772 (p->pixel_format >> 24) & 0xff,
1773 p->type);
1774 switch (p->type) {
1775 case V4L2_FRMSIZE_TYPE_DISCRETE:
1776 dbgarg3("width = %d, height=%d\n",
1777 p->discrete.width, p->discrete.height);
1778 break;
1779 case V4L2_FRMSIZE_TYPE_STEPWISE:
1780 dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
1781 p->stepwise.min_width, p->stepwise.min_height,
1782 p->stepwise.step_width, p->stepwise.step_height,
1783 p->stepwise.max_width, p->stepwise.max_height);
1784 break;
1785 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1786 dbgarg3("continuous\n");
1787 break;
1788 default:
1789 dbgarg3("- Unknown type!\n");
1790 }
1791
1792 break;
1793 }
1794 case VIDIOC_ENUM_FRAMEINTERVALS:
1795 {
1796 struct v4l2_frmivalenum *p = arg;
1797
1798 if (!ops->vidioc_enum_frameintervals)
1799 break;
1800
1801 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1802 dbgarg(cmd,
1803 "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1804 p->index, p->pixel_format,
1805 p->width, p->height, p->type);
1806 switch (p->type) {
1807 case V4L2_FRMIVAL_TYPE_DISCRETE:
1808 dbgarg2("fps=%d/%d\n",
1809 p->discrete.numerator,
1810 p->discrete.denominator);
1811 break;
1812 case V4L2_FRMIVAL_TYPE_STEPWISE:
1813 dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1814 p->stepwise.min.numerator,
1815 p->stepwise.min.denominator,
1816 p->stepwise.max.numerator,
1817 p->stepwise.max.denominator,
1818 p->stepwise.step.numerator,
1819 p->stepwise.step.denominator);
1820 break;
1821 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1822 dbgarg2("continuous\n");
1823 break;
1824 default:
1825 dbgarg2("- Unknown type!\n");
1826 }
1827 break;
1828 }
1829 case VIDIOC_ENUM_DV_PRESETS:
1830 {
1831 struct v4l2_dv_enum_preset *p = arg;
1832
1833 if (!ops->vidioc_enum_dv_presets)
1834 break;
1835
1836 ret = ops->vidioc_enum_dv_presets(file, fh, p);
1837 if (!ret)
1838 dbgarg(cmd,
1839 "index=%d, preset=%d, name=%s, width=%d,"
1840 " height=%d ",
1841 p->index, p->preset, p->name, p->width,
1842 p->height);
1843 break;
1844 }
1845 case VIDIOC_S_DV_PRESET:
1846 {
1847 struct v4l2_dv_preset *p = arg;
1848
1849 if (!ops->vidioc_s_dv_preset)
1850 break;
1851
1852 dbgarg(cmd, "preset=%d\n", p->preset);
1853 ret = ops->vidioc_s_dv_preset(file, fh, p);
1854 break;
1855 }
1856 case VIDIOC_G_DV_PRESET:
1857 {
1858 struct v4l2_dv_preset *p = arg;
1859
1860 if (!ops->vidioc_g_dv_preset)
1861 break;
1862
1863 ret = ops->vidioc_g_dv_preset(file, fh, p);
1864 if (!ret)
1865 dbgarg(cmd, "preset=%d\n", p->preset);
1866 break;
1867 }
1868 case VIDIOC_QUERY_DV_PRESET:
1869 {
1870 struct v4l2_dv_preset *p = arg;
1871
1872 if (!ops->vidioc_query_dv_preset)
1873 break;
1874
1875 ret = ops->vidioc_query_dv_preset(file, fh, p);
1876 if (!ret)
1877 dbgarg(cmd, "preset=%d\n", p->preset);
1878 break;
1879 }
1880 case VIDIOC_S_DV_TIMINGS:
1881 {
1882 struct v4l2_dv_timings *p = arg;
1883
1884 if (!ops->vidioc_s_dv_timings)
1885 break;
1886
1887 switch (p->type) {
1888 case V4L2_DV_BT_656_1120:
1889 dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
1890 " width=%d, height=%d, polarities=%x,"
1891 " hfrontporch=%d, hsync=%d, hbackporch=%d,"
1892 " vfrontporch=%d, vsync=%d, vbackporch=%d,"
1893 " il_vfrontporch=%d, il_vsync=%d,"
1894 " il_vbackporch=%d\n",
1895 p->bt.interlaced, p->bt.pixelclock,
1896 p->bt.width, p->bt.height, p->bt.polarities,
1897 p->bt.hfrontporch, p->bt.hsync,
1898 p->bt.hbackporch, p->bt.vfrontporch,
1899 p->bt.vsync, p->bt.vbackporch,
1900 p->bt.il_vfrontporch, p->bt.il_vsync,
1901 p->bt.il_vbackporch);
1902 ret = ops->vidioc_s_dv_timings(file, fh, p);
1903 break;
1904 default:
1905 dbgarg2("Unknown type %d!\n", p->type);
1906 break;
1907 }
1908 break;
1909 }
1910 case VIDIOC_G_DV_TIMINGS:
1911 {
1912 struct v4l2_dv_timings *p = arg;
1913
1914 if (!ops->vidioc_g_dv_timings)
1915 break;
1916
1917 ret = ops->vidioc_g_dv_timings(file, fh, p);
1918 if (!ret) {
1919 switch (p->type) {
1920 case V4L2_DV_BT_656_1120:
1921 dbgarg2("bt-656/1120:interlaced=%d,"
1922 " pixelclock=%lld,"
1923 " width=%d, height=%d, polarities=%x,"
1924 " hfrontporch=%d, hsync=%d,"
1925 " hbackporch=%d, vfrontporch=%d,"
1926 " vsync=%d, vbackporch=%d,"
1927 " il_vfrontporch=%d, il_vsync=%d,"
1928 " il_vbackporch=%d\n",
1929 p->bt.interlaced, p->bt.pixelclock,
1930 p->bt.width, p->bt.height,
1931 p->bt.polarities, p->bt.hfrontporch,
1932 p->bt.hsync, p->bt.hbackporch,
1933 p->bt.vfrontporch, p->bt.vsync,
1934 p->bt.vbackporch, p->bt.il_vfrontporch,
1935 p->bt.il_vsync, p->bt.il_vbackporch);
1936 break;
1937 default:
1938 dbgarg2("Unknown type %d!\n", p->type);
1939 break;
1940 }
1941 }
1942 break;
1943 }
1944
1945 default:
1946 {
1947 if (!ops->vidioc_default)
1948 break;
1949 ret = ops->vidioc_default(file, fh, cmd, arg);
1950 break;
1951 }
1952 } /* switch */
1953
1954 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1955 if (ret < 0) {
1956 v4l_print_ioctl(vfd->name, cmd);
1957 printk(KERN_CONT " error %ld\n", ret);
1958 }
1959 }
1960
1961 return ret;
1962}
1963
1964/* In some cases, only a few fields are used as input, i.e. when the app sets
1965 * "index" and then the driver fills in the rest of the structure for the thing
1966 * with that index. We only need to copy up the first non-input field. */
1967static unsigned long cmd_input_size(unsigned int cmd)
1968{
1969 /* Size of structure up to and including 'field' */
1970#define CMDINSIZE(cmd, type, field) \
1971 case VIDIOC_##cmd: \
1972 return offsetof(struct v4l2_##type, field) + \
1973 sizeof(((struct v4l2_##type *)0)->field);
1974
1975 switch (cmd) {
1976 CMDINSIZE(ENUM_FMT, fmtdesc, type);
1977 CMDINSIZE(G_FMT, format, type);
1978 CMDINSIZE(QUERYBUF, buffer, type);
1979 CMDINSIZE(G_PARM, streamparm, type);
1980 CMDINSIZE(ENUMSTD, standard, index);
1981 CMDINSIZE(ENUMINPUT, input, index);
1982 CMDINSIZE(G_CTRL, control, id);
1983 CMDINSIZE(G_TUNER, tuner, index);
1984 CMDINSIZE(QUERYCTRL, queryctrl, id);
1985 CMDINSIZE(QUERYMENU, querymenu, index);
1986 CMDINSIZE(ENUMOUTPUT, output, index);
1987 CMDINSIZE(G_MODULATOR, modulator, index);
1988 CMDINSIZE(G_FREQUENCY, frequency, tuner);
1989 CMDINSIZE(CROPCAP, cropcap, type);
1990 CMDINSIZE(G_CROP, crop, type);
1991 CMDINSIZE(ENUMAUDIO, audio, index);
1992 CMDINSIZE(ENUMAUDOUT, audioout, index);
1993 CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
1994 CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
1995 CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
1996 CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
1997 CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
1998 default:
1999 return _IOC_SIZE(cmd);
2000 }
2001}
2002
2003long video_ioctl2(struct file *file,
2004 unsigned int cmd, unsigned long arg)
2005{
2006 char sbuf[128];
2007 void *mbuf = NULL;
2008 void *parg = NULL;
2009 long err = -EINVAL;
2010 int is_ext_ctrl;
2011 size_t ctrls_size = 0;
2012 void __user *user_ptr = NULL;
2013
2014#ifdef __OLD_VIDIOC_
2015 cmd = video_fix_command(cmd);
2016#endif
2017 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
2018 cmd == VIDIOC_TRY_EXT_CTRLS);
2019
2020 /* Copy arguments into temp kernel buffer */
2021 if (_IOC_DIR(cmd) != _IOC_NONE) {
2022 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2023 parg = sbuf;
2024 } else {
2025 /* too big to allocate from stack */
2026 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2027 if (NULL == mbuf)
2028 return -ENOMEM;
2029 parg = mbuf;
2030 }
2031
2032 err = -EFAULT;
2033 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2034 unsigned long n = cmd_input_size(cmd);
2035
2036 if (copy_from_user(parg, (void __user *)arg, n))
2037 goto out;
2038
2039 /* zero out anything we don't copy from userspace */
2040 if (n < _IOC_SIZE(cmd))
2041 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2042 } else {
2043 /* read-only ioctl */
2044 memset(parg, 0, _IOC_SIZE(cmd));
2045 }
2046 }
2047
2048 if (is_ext_ctrl) {
2049 struct v4l2_ext_controls *p = parg;
2050
2051 /* In case of an error, tell the caller that it wasn't
2052 a specific control that caused it. */
2053 p->error_idx = p->count;
2054 user_ptr = (void __user *)p->controls;
2055 if (p->count) {
2056 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
2057 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
2058 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
2059 err = -ENOMEM;
2060 if (NULL == mbuf)
2061 goto out_ext_ctrl;
2062 err = -EFAULT;
2063 if (copy_from_user(mbuf, user_ptr, ctrls_size))
2064 goto out_ext_ctrl;
2065 p->controls = mbuf;
2066 }
2067 }
2068
2069 /* Handles IOCTL */
2070 err = __video_do_ioctl(file, cmd, parg);
2071 if (err == -ENOIOCTLCMD)
2072 err = -EINVAL;
2073 if (is_ext_ctrl) {
2074 struct v4l2_ext_controls *p = parg;
2075
2076 p->controls = (void *)user_ptr;
2077 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
2078 err = -EFAULT;
2079 goto out_ext_ctrl;
2080 }
2081 if (err < 0)
2082 goto out;
2083
2084out_ext_ctrl:
2085 /* Copy results into user buffer */
2086 switch (_IOC_DIR(cmd)) {
2087 case _IOC_READ:
2088 case (_IOC_WRITE | _IOC_READ):
2089 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2090 err = -EFAULT;
2091 break;
2092 }
2093
2094out:
2095 kfree(mbuf);
2096 return err;
2097}
2098EXPORT_SYMBOL(video_ioctl2);