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block: fix linkage problem with blk_iopoll and !CONFIG_BLOCK
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / v4l2-ioctl.c
1 /*
2 * Video capture interface for Linux version 2
3 *
4 * A generic framework to process V4L2 ioctl commands.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13 */
14
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18
19 #define __OLD_VIDIOC_ /* To allow fixing old calls */
20 #include <linux/videodev.h>
21 #include <linux/videodev2.h>
22
23 #ifdef CONFIG_VIDEO_V4L1
24 #include <linux/videodev.h>
25 #endif
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-ioctl.h>
28 #include <media/v4l2-chip-ident.h>
29
30 #define dbgarg(cmd, fmt, arg...) \
31 do { \
32 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \
33 printk(KERN_DEBUG "%s: ", vfd->name); \
34 v4l_printk_ioctl(cmd); \
35 printk(" " fmt, ## arg); \
36 } \
37 } while (0)
38
39 #define dbgarg2(fmt, arg...) \
40 do { \
41 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
42 printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
43 } while (0)
44
45 /* Zero out the end of the struct pointed to by p. Everthing after, but
46 * not including, the specified field is cleared. */
47 #define CLEAR_AFTER_FIELD(p, field) \
48 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
49 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
50
51 struct std_descr {
52 v4l2_std_id std;
53 const char *descr;
54 };
55
56 static const struct std_descr standards[] = {
57 { V4L2_STD_NTSC, "NTSC" },
58 { V4L2_STD_NTSC_M, "NTSC-M" },
59 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
60 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
61 { V4L2_STD_NTSC_443, "NTSC-443" },
62 { V4L2_STD_PAL, "PAL" },
63 { V4L2_STD_PAL_BG, "PAL-BG" },
64 { V4L2_STD_PAL_B, "PAL-B" },
65 { V4L2_STD_PAL_B1, "PAL-B1" },
66 { V4L2_STD_PAL_G, "PAL-G" },
67 { V4L2_STD_PAL_H, "PAL-H" },
68 { V4L2_STD_PAL_I, "PAL-I" },
69 { V4L2_STD_PAL_DK, "PAL-DK" },
70 { V4L2_STD_PAL_D, "PAL-D" },
71 { V4L2_STD_PAL_D1, "PAL-D1" },
72 { V4L2_STD_PAL_K, "PAL-K" },
73 { V4L2_STD_PAL_M, "PAL-M" },
74 { V4L2_STD_PAL_N, "PAL-N" },
75 { V4L2_STD_PAL_Nc, "PAL-Nc" },
76 { V4L2_STD_PAL_60, "PAL-60" },
77 { V4L2_STD_SECAM, "SECAM" },
78 { V4L2_STD_SECAM_B, "SECAM-B" },
79 { V4L2_STD_SECAM_G, "SECAM-G" },
80 { V4L2_STD_SECAM_H, "SECAM-H" },
81 { V4L2_STD_SECAM_DK, "SECAM-DK" },
82 { V4L2_STD_SECAM_D, "SECAM-D" },
83 { V4L2_STD_SECAM_K, "SECAM-K" },
84 { V4L2_STD_SECAM_K1, "SECAM-K1" },
85 { V4L2_STD_SECAM_L, "SECAM-L" },
86 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
87 { 0, "Unknown" }
88 };
89
90 /* video4linux standard ID conversion to standard name
91 */
92 const char *v4l2_norm_to_name(v4l2_std_id id)
93 {
94 u32 myid = id;
95 int i;
96
97 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
98 64 bit comparations. So, on that architecture, with some gcc
99 variants, compilation fails. Currently, the max value is 30bit wide.
100 */
101 BUG_ON(myid != id);
102
103 for (i = 0; standards[i].std; i++)
104 if (myid == standards[i].std)
105 break;
106 return standards[i].descr;
107 }
108 EXPORT_SYMBOL(v4l2_norm_to_name);
109
110 /* Returns frame period for the given standard */
111 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
112 {
113 if (id & V4L2_STD_525_60) {
114 frameperiod->numerator = 1001;
115 frameperiod->denominator = 30000;
116 } else {
117 frameperiod->numerator = 1;
118 frameperiod->denominator = 25;
119 }
120 }
121 EXPORT_SYMBOL(v4l2_video_std_frame_period);
122
123 /* Fill in the fields of a v4l2_standard structure according to the
124 'id' and 'transmission' parameters. Returns negative on error. */
125 int v4l2_video_std_construct(struct v4l2_standard *vs,
126 int id, const char *name)
127 {
128 vs->id = id;
129 v4l2_video_std_frame_period(id, &vs->frameperiod);
130 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
131 strlcpy(vs->name, name, sizeof(vs->name));
132 return 0;
133 }
134 EXPORT_SYMBOL(v4l2_video_std_construct);
135
136 /* ----------------------------------------------------------------- */
137 /* some arrays for pretty-printing debug messages of enum types */
138
139 const char *v4l2_field_names[] = {
140 [V4L2_FIELD_ANY] = "any",
141 [V4L2_FIELD_NONE] = "none",
142 [V4L2_FIELD_TOP] = "top",
143 [V4L2_FIELD_BOTTOM] = "bottom",
144 [V4L2_FIELD_INTERLACED] = "interlaced",
145 [V4L2_FIELD_SEQ_TB] = "seq-tb",
146 [V4L2_FIELD_SEQ_BT] = "seq-bt",
147 [V4L2_FIELD_ALTERNATE] = "alternate",
148 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
149 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
150 };
151 EXPORT_SYMBOL(v4l2_field_names);
152
153 const char *v4l2_type_names[] = {
154 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
155 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
156 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
157 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
158 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
159 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
160 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
161 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
162 };
163 EXPORT_SYMBOL(v4l2_type_names);
164
165 static const char *v4l2_memory_names[] = {
166 [V4L2_MEMORY_MMAP] = "mmap",
167 [V4L2_MEMORY_USERPTR] = "userptr",
168 [V4L2_MEMORY_OVERLAY] = "overlay",
169 };
170
171 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
172 arr[a] : "unknown")
173
174 /* ------------------------------------------------------------------ */
175 /* debug help functions */
176
177 #ifdef CONFIG_VIDEO_V4L1_COMPAT
178 static const char *v4l1_ioctls[] = {
179 [_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
180 [_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
181 [_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
182 [_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
183 [_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
184 [_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
185 [_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
186 [_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
187 [_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
188 [_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
189 [_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
190 [_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
191 [_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
192 [_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
193 [_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
194 [_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
195 [_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
196 [_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
197 [_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
198 [_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
199 [_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
200 [_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
201 [_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
202 [_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
203 [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
204 [_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
205 [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
206 [_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
207 [_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
208 };
209 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
210 #endif
211
212 static const char *v4l2_ioctls[] = {
213 [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
214 [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
215 [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
216 [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
217 [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
218 [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
219 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
220 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
221 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
222 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
223 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
224 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
225 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
226 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
227 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
228 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
229 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
230 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
231 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
232 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
233 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
234 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
235 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
236 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
237 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
238 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
239 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
240 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
241 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
242 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
243 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
244 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
245 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
246 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
247 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
248 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
249 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
250 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
251 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
252 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
253 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
254 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
255 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
256 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
257 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
258 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
259 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
260 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
261 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
262 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
263 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
264 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
265 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
266 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
267 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
268 #if 1
269 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
270 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
271 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
272 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
273 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
274
275 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
276 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
277
278 [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
279 [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK",
280 #endif
281 };
282 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
283
284 /* Common ioctl debug function. This function can be used by
285 external ioctl messages as well as internal V4L ioctl */
286 void v4l_printk_ioctl(unsigned int cmd)
287 {
288 char *dir, *type;
289
290 switch (_IOC_TYPE(cmd)) {
291 case 'd':
292 type = "v4l2_int";
293 break;
294 #ifdef CONFIG_VIDEO_V4L1_COMPAT
295 case 'v':
296 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
297 type = "v4l1";
298 break;
299 }
300 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
301 return;
302 #endif
303 case 'V':
304 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
305 type = "v4l2";
306 break;
307 }
308 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
309 return;
310 default:
311 type = "unknown";
312 }
313
314 switch (_IOC_DIR(cmd)) {
315 case _IOC_NONE: dir = "--"; break;
316 case _IOC_READ: dir = "r-"; break;
317 case _IOC_WRITE: dir = "-w"; break;
318 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
319 default: dir = "*ERR*"; break;
320 }
321 printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
322 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
323 }
324 EXPORT_SYMBOL(v4l_printk_ioctl);
325
326 /*
327 * helper function -- handles userspace copying for ioctl arguments
328 */
329
330 #ifdef __OLD_VIDIOC_
331 static unsigned int
332 video_fix_command(unsigned int cmd)
333 {
334 switch (cmd) {
335 case VIDIOC_OVERLAY_OLD:
336 cmd = VIDIOC_OVERLAY;
337 break;
338 case VIDIOC_S_PARM_OLD:
339 cmd = VIDIOC_S_PARM;
340 break;
341 case VIDIOC_S_CTRL_OLD:
342 cmd = VIDIOC_S_CTRL;
343 break;
344 case VIDIOC_G_AUDIO_OLD:
345 cmd = VIDIOC_G_AUDIO;
346 break;
347 case VIDIOC_G_AUDOUT_OLD:
348 cmd = VIDIOC_G_AUDOUT;
349 break;
350 case VIDIOC_CROPCAP_OLD:
351 cmd = VIDIOC_CROPCAP;
352 break;
353 }
354 return cmd;
355 }
356 #endif
357
358 /*
359 * Obsolete usercopy function - Should be removed soon
360 */
361 long
362 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
363 v4l2_kioctl func)
364 {
365 char sbuf[128];
366 void *mbuf = NULL;
367 void *parg = NULL;
368 long err = -EINVAL;
369 int is_ext_ctrl;
370 size_t ctrls_size = 0;
371 void __user *user_ptr = NULL;
372
373 #ifdef __OLD_VIDIOC_
374 cmd = video_fix_command(cmd);
375 #endif
376 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
377 cmd == VIDIOC_TRY_EXT_CTRLS);
378
379 /* Copy arguments into temp kernel buffer */
380 switch (_IOC_DIR(cmd)) {
381 case _IOC_NONE:
382 parg = NULL;
383 break;
384 case _IOC_READ:
385 case _IOC_WRITE:
386 case (_IOC_WRITE | _IOC_READ):
387 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
388 parg = sbuf;
389 } else {
390 /* too big to allocate from stack */
391 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
392 if (NULL == mbuf)
393 return -ENOMEM;
394 parg = mbuf;
395 }
396
397 err = -EFAULT;
398 if (_IOC_DIR(cmd) & _IOC_WRITE)
399 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
400 goto out;
401 break;
402 }
403 if (is_ext_ctrl) {
404 struct v4l2_ext_controls *p = parg;
405
406 /* In case of an error, tell the caller that it wasn't
407 a specific control that caused it. */
408 p->error_idx = p->count;
409 user_ptr = (void __user *)p->controls;
410 if (p->count) {
411 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
412 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
413 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
414 err = -ENOMEM;
415 if (NULL == mbuf)
416 goto out_ext_ctrl;
417 err = -EFAULT;
418 if (copy_from_user(mbuf, user_ptr, ctrls_size))
419 goto out_ext_ctrl;
420 p->controls = mbuf;
421 }
422 }
423
424 /* call driver */
425 err = func(file, cmd, parg);
426 if (err == -ENOIOCTLCMD)
427 err = -EINVAL;
428 if (is_ext_ctrl) {
429 struct v4l2_ext_controls *p = parg;
430
431 p->controls = (void *)user_ptr;
432 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
433 err = -EFAULT;
434 goto out_ext_ctrl;
435 }
436 if (err < 0)
437 goto out;
438
439 out_ext_ctrl:
440 /* Copy results into user buffer */
441 switch (_IOC_DIR(cmd)) {
442 case _IOC_READ:
443 case (_IOC_WRITE | _IOC_READ):
444 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
445 err = -EFAULT;
446 break;
447 }
448
449 out:
450 kfree(mbuf);
451 return err;
452 }
453 EXPORT_SYMBOL(video_usercopy);
454
455 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
456 struct v4l2_buffer *p)
457 {
458 struct v4l2_timecode *tc = &p->timecode;
459
460 dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
461 "bytesused=%d, flags=0x%08d, "
462 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
463 p->timestamp.tv_sec / 3600,
464 (int)(p->timestamp.tv_sec / 60) % 60,
465 (int)(p->timestamp.tv_sec % 60),
466 (long)p->timestamp.tv_usec,
467 p->index,
468 prt_names(p->type, v4l2_type_names),
469 p->bytesused, p->flags,
470 p->field, p->sequence,
471 prt_names(p->memory, v4l2_memory_names),
472 p->m.userptr, p->length);
473 dbgarg2("timecode=%02d:%02d:%02d type=%d, "
474 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
475 tc->hours, tc->minutes, tc->seconds,
476 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
477 }
478
479 static inline void dbgrect(struct video_device *vfd, char *s,
480 struct v4l2_rect *r)
481 {
482 dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
483 r->width, r->height);
484 };
485
486 static inline void v4l_print_pix_fmt(struct video_device *vfd,
487 struct v4l2_pix_format *fmt)
488 {
489 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
490 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
491 fmt->width, fmt->height,
492 (fmt->pixelformat & 0xff),
493 (fmt->pixelformat >> 8) & 0xff,
494 (fmt->pixelformat >> 16) & 0xff,
495 (fmt->pixelformat >> 24) & 0xff,
496 prt_names(fmt->field, v4l2_field_names),
497 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
498 };
499
500 static inline void v4l_print_ext_ctrls(unsigned int cmd,
501 struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
502 {
503 __u32 i;
504
505 if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
506 return;
507 dbgarg(cmd, "");
508 printk(KERN_CONT "class=0x%x", c->ctrl_class);
509 for (i = 0; i < c->count; i++) {
510 if (show_vals)
511 printk(KERN_CONT " id/val=0x%x/0x%x",
512 c->controls[i].id, c->controls[i].value);
513 else
514 printk(KERN_CONT " id=0x%x", c->controls[i].id);
515 }
516 printk(KERN_CONT "\n");
517 };
518
519 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
520 {
521 __u32 i;
522
523 /* zero the reserved fields */
524 c->reserved[0] = c->reserved[1] = 0;
525 for (i = 0; i < c->count; i++) {
526 c->controls[i].reserved2[0] = 0;
527 c->controls[i].reserved2[1] = 0;
528 }
529 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
530 when using extended controls.
531 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
532 is it allowed for backwards compatibility.
533 */
534 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
535 return 0;
536 /* Check that all controls are from the same control class. */
537 for (i = 0; i < c->count; i++) {
538 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
539 c->error_idx = i;
540 return 0;
541 }
542 }
543 return 1;
544 }
545
546 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
547 {
548 if (ops == NULL)
549 return -EINVAL;
550
551 switch (type) {
552 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
553 if (ops->vidioc_g_fmt_vid_cap)
554 return 0;
555 break;
556 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
557 if (ops->vidioc_g_fmt_vid_overlay)
558 return 0;
559 break;
560 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
561 if (ops->vidioc_g_fmt_vid_out)
562 return 0;
563 break;
564 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
565 if (ops->vidioc_g_fmt_vid_out_overlay)
566 return 0;
567 break;
568 case V4L2_BUF_TYPE_VBI_CAPTURE:
569 if (ops->vidioc_g_fmt_vbi_cap)
570 return 0;
571 break;
572 case V4L2_BUF_TYPE_VBI_OUTPUT:
573 if (ops->vidioc_g_fmt_vbi_out)
574 return 0;
575 break;
576 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
577 if (ops->vidioc_g_fmt_sliced_vbi_cap)
578 return 0;
579 break;
580 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
581 if (ops->vidioc_g_fmt_sliced_vbi_out)
582 return 0;
583 break;
584 case V4L2_BUF_TYPE_PRIVATE:
585 if (ops->vidioc_g_fmt_type_private)
586 return 0;
587 break;
588 }
589 return -EINVAL;
590 }
591
592 static long __video_do_ioctl(struct file *file,
593 unsigned int cmd, void *arg)
594 {
595 struct video_device *vfd = video_devdata(file);
596 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
597 void *fh = file->private_data;
598 long ret = -EINVAL;
599
600 if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
601 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
602 v4l_print_ioctl(vfd->name, cmd);
603 printk(KERN_CONT "\n");
604 }
605
606 if (ops == NULL) {
607 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
608 vfd->name);
609 return -EINVAL;
610 }
611
612 #ifdef CONFIG_VIDEO_V4L1_COMPAT
613 /***********************************************************
614 Handles calls to the obsoleted V4L1 API
615 Due to the nature of VIDIOCGMBUF, each driver that supports
616 V4L1 should implement its own handler for this ioctl.
617 ***********************************************************/
618
619 /* --- streaming capture ------------------------------------- */
620 if (cmd == VIDIOCGMBUF) {
621 struct video_mbuf *p = arg;
622
623 if (!ops->vidiocgmbuf)
624 return ret;
625 ret = ops->vidiocgmbuf(file, fh, p);
626 if (!ret)
627 dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
628 p->size, p->frames,
629 (unsigned long)p->offsets);
630 return ret;
631 }
632
633 /********************************************************
634 All other V4L1 calls are handled by v4l1_compat module.
635 Those calls will be translated into V4L2 calls, and
636 __video_do_ioctl will be called again, with one or more
637 V4L2 ioctls.
638 ********************************************************/
639 if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
640 return v4l_compat_translate_ioctl(file, cmd, arg,
641 __video_do_ioctl);
642 #endif
643
644 switch (cmd) {
645 /* --- capabilities ------------------------------------------ */
646 case VIDIOC_QUERYCAP:
647 {
648 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
649
650 if (!ops->vidioc_querycap)
651 break;
652
653 ret = ops->vidioc_querycap(file, fh, cap);
654 if (!ret)
655 dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
656 "version=0x%08x, "
657 "capabilities=0x%08x\n",
658 cap->driver, cap->card, cap->bus_info,
659 cap->version,
660 cap->capabilities);
661 break;
662 }
663
664 /* --- priority ------------------------------------------ */
665 case VIDIOC_G_PRIORITY:
666 {
667 enum v4l2_priority *p = arg;
668
669 if (!ops->vidioc_g_priority)
670 break;
671 ret = ops->vidioc_g_priority(file, fh, p);
672 if (!ret)
673 dbgarg(cmd, "priority is %d\n", *p);
674 break;
675 }
676 case VIDIOC_S_PRIORITY:
677 {
678 enum v4l2_priority *p = arg;
679
680 if (!ops->vidioc_s_priority)
681 break;
682 dbgarg(cmd, "setting priority to %d\n", *p);
683 ret = ops->vidioc_s_priority(file, fh, *p);
684 break;
685 }
686
687 /* --- capture ioctls ---------------------------------------- */
688 case VIDIOC_ENUM_FMT:
689 {
690 struct v4l2_fmtdesc *f = arg;
691
692 switch (f->type) {
693 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
694 if (ops->vidioc_enum_fmt_vid_cap)
695 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
696 break;
697 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
698 if (ops->vidioc_enum_fmt_vid_overlay)
699 ret = ops->vidioc_enum_fmt_vid_overlay(file,
700 fh, f);
701 break;
702 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
703 if (ops->vidioc_enum_fmt_vid_out)
704 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
705 break;
706 case V4L2_BUF_TYPE_PRIVATE:
707 if (ops->vidioc_enum_fmt_type_private)
708 ret = ops->vidioc_enum_fmt_type_private(file,
709 fh, f);
710 break;
711 default:
712 break;
713 }
714 if (!ret)
715 dbgarg(cmd, "index=%d, type=%d, flags=%d, "
716 "pixelformat=%c%c%c%c, description='%s'\n",
717 f->index, f->type, f->flags,
718 (f->pixelformat & 0xff),
719 (f->pixelformat >> 8) & 0xff,
720 (f->pixelformat >> 16) & 0xff,
721 (f->pixelformat >> 24) & 0xff,
722 f->description);
723 break;
724 }
725 case VIDIOC_G_FMT:
726 {
727 struct v4l2_format *f = (struct v4l2_format *)arg;
728
729 /* FIXME: Should be one dump per type */
730 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
731
732 switch (f->type) {
733 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
734 if (ops->vidioc_g_fmt_vid_cap)
735 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
736 if (!ret)
737 v4l_print_pix_fmt(vfd, &f->fmt.pix);
738 break;
739 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
740 if (ops->vidioc_g_fmt_vid_overlay)
741 ret = ops->vidioc_g_fmt_vid_overlay(file,
742 fh, f);
743 break;
744 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
745 if (ops->vidioc_g_fmt_vid_out)
746 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
747 if (!ret)
748 v4l_print_pix_fmt(vfd, &f->fmt.pix);
749 break;
750 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
751 if (ops->vidioc_g_fmt_vid_out_overlay)
752 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
753 fh, f);
754 break;
755 case V4L2_BUF_TYPE_VBI_CAPTURE:
756 if (ops->vidioc_g_fmt_vbi_cap)
757 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
758 break;
759 case V4L2_BUF_TYPE_VBI_OUTPUT:
760 if (ops->vidioc_g_fmt_vbi_out)
761 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
762 break;
763 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
764 if (ops->vidioc_g_fmt_sliced_vbi_cap)
765 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
766 fh, f);
767 break;
768 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
769 if (ops->vidioc_g_fmt_sliced_vbi_out)
770 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
771 fh, f);
772 break;
773 case V4L2_BUF_TYPE_PRIVATE:
774 if (ops->vidioc_g_fmt_type_private)
775 ret = ops->vidioc_g_fmt_type_private(file,
776 fh, f);
777 break;
778 }
779
780 break;
781 }
782 case VIDIOC_S_FMT:
783 {
784 struct v4l2_format *f = (struct v4l2_format *)arg;
785
786 /* FIXME: Should be one dump per type */
787 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
788
789 switch (f->type) {
790 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
791 CLEAR_AFTER_FIELD(f, fmt.pix);
792 v4l_print_pix_fmt(vfd, &f->fmt.pix);
793 if (ops->vidioc_s_fmt_vid_cap)
794 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
795 break;
796 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
797 CLEAR_AFTER_FIELD(f, fmt.win);
798 if (ops->vidioc_s_fmt_vid_overlay)
799 ret = ops->vidioc_s_fmt_vid_overlay(file,
800 fh, f);
801 break;
802 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
803 CLEAR_AFTER_FIELD(f, fmt.pix);
804 v4l_print_pix_fmt(vfd, &f->fmt.pix);
805 if (ops->vidioc_s_fmt_vid_out)
806 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
807 break;
808 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
809 CLEAR_AFTER_FIELD(f, fmt.win);
810 if (ops->vidioc_s_fmt_vid_out_overlay)
811 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
812 fh, f);
813 break;
814 case V4L2_BUF_TYPE_VBI_CAPTURE:
815 CLEAR_AFTER_FIELD(f, fmt.vbi);
816 if (ops->vidioc_s_fmt_vbi_cap)
817 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
818 break;
819 case V4L2_BUF_TYPE_VBI_OUTPUT:
820 CLEAR_AFTER_FIELD(f, fmt.vbi);
821 if (ops->vidioc_s_fmt_vbi_out)
822 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
823 break;
824 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
825 CLEAR_AFTER_FIELD(f, fmt.sliced);
826 if (ops->vidioc_s_fmt_sliced_vbi_cap)
827 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
828 fh, f);
829 break;
830 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
831 CLEAR_AFTER_FIELD(f, fmt.sliced);
832 if (ops->vidioc_s_fmt_sliced_vbi_out)
833 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
834 fh, f);
835 break;
836 case V4L2_BUF_TYPE_PRIVATE:
837 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
838 if (ops->vidioc_s_fmt_type_private)
839 ret = ops->vidioc_s_fmt_type_private(file,
840 fh, f);
841 break;
842 }
843 break;
844 }
845 case VIDIOC_TRY_FMT:
846 {
847 struct v4l2_format *f = (struct v4l2_format *)arg;
848
849 /* FIXME: Should be one dump per type */
850 dbgarg(cmd, "type=%s\n", prt_names(f->type,
851 v4l2_type_names));
852 switch (f->type) {
853 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
854 CLEAR_AFTER_FIELD(f, fmt.pix);
855 if (ops->vidioc_try_fmt_vid_cap)
856 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
857 if (!ret)
858 v4l_print_pix_fmt(vfd, &f->fmt.pix);
859 break;
860 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
861 CLEAR_AFTER_FIELD(f, fmt.win);
862 if (ops->vidioc_try_fmt_vid_overlay)
863 ret = ops->vidioc_try_fmt_vid_overlay(file,
864 fh, f);
865 break;
866 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
867 CLEAR_AFTER_FIELD(f, fmt.pix);
868 if (ops->vidioc_try_fmt_vid_out)
869 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
870 if (!ret)
871 v4l_print_pix_fmt(vfd, &f->fmt.pix);
872 break;
873 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
874 CLEAR_AFTER_FIELD(f, fmt.win);
875 if (ops->vidioc_try_fmt_vid_out_overlay)
876 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
877 fh, f);
878 break;
879 case V4L2_BUF_TYPE_VBI_CAPTURE:
880 CLEAR_AFTER_FIELD(f, fmt.vbi);
881 if (ops->vidioc_try_fmt_vbi_cap)
882 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
883 break;
884 case V4L2_BUF_TYPE_VBI_OUTPUT:
885 CLEAR_AFTER_FIELD(f, fmt.vbi);
886 if (ops->vidioc_try_fmt_vbi_out)
887 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
888 break;
889 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
890 CLEAR_AFTER_FIELD(f, fmt.sliced);
891 if (ops->vidioc_try_fmt_sliced_vbi_cap)
892 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
893 fh, f);
894 break;
895 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
896 CLEAR_AFTER_FIELD(f, fmt.sliced);
897 if (ops->vidioc_try_fmt_sliced_vbi_out)
898 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
899 fh, f);
900 break;
901 case V4L2_BUF_TYPE_PRIVATE:
902 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
903 if (ops->vidioc_try_fmt_type_private)
904 ret = ops->vidioc_try_fmt_type_private(file,
905 fh, f);
906 break;
907 }
908
909 break;
910 }
911 /* FIXME: Those buf reqs could be handled here,
912 with some changes on videobuf to allow its header to be included at
913 videodev2.h or being merged at videodev2.
914 */
915 case VIDIOC_REQBUFS:
916 {
917 struct v4l2_requestbuffers *p = arg;
918
919 if (!ops->vidioc_reqbufs)
920 break;
921 ret = check_fmt(ops, p->type);
922 if (ret)
923 break;
924
925 if (p->type < V4L2_BUF_TYPE_PRIVATE)
926 CLEAR_AFTER_FIELD(p, memory);
927
928 ret = ops->vidioc_reqbufs(file, fh, p);
929 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
930 p->count,
931 prt_names(p->type, v4l2_type_names),
932 prt_names(p->memory, v4l2_memory_names));
933 break;
934 }
935 case VIDIOC_QUERYBUF:
936 {
937 struct v4l2_buffer *p = arg;
938
939 if (!ops->vidioc_querybuf)
940 break;
941 ret = check_fmt(ops, p->type);
942 if (ret)
943 break;
944
945 ret = ops->vidioc_querybuf(file, fh, p);
946 if (!ret)
947 dbgbuf(cmd, vfd, p);
948 break;
949 }
950 case VIDIOC_QBUF:
951 {
952 struct v4l2_buffer *p = arg;
953
954 if (!ops->vidioc_qbuf)
955 break;
956 ret = check_fmt(ops, p->type);
957 if (ret)
958 break;
959
960 ret = ops->vidioc_qbuf(file, fh, p);
961 if (!ret)
962 dbgbuf(cmd, vfd, p);
963 break;
964 }
965 case VIDIOC_DQBUF:
966 {
967 struct v4l2_buffer *p = arg;
968
969 if (!ops->vidioc_dqbuf)
970 break;
971 ret = check_fmt(ops, p->type);
972 if (ret)
973 break;
974
975 ret = ops->vidioc_dqbuf(file, fh, p);
976 if (!ret)
977 dbgbuf(cmd, vfd, p);
978 break;
979 }
980 case VIDIOC_OVERLAY:
981 {
982 int *i = arg;
983
984 if (!ops->vidioc_overlay)
985 break;
986 dbgarg(cmd, "value=%d\n", *i);
987 ret = ops->vidioc_overlay(file, fh, *i);
988 break;
989 }
990 case VIDIOC_G_FBUF:
991 {
992 struct v4l2_framebuffer *p = arg;
993
994 if (!ops->vidioc_g_fbuf)
995 break;
996 ret = ops->vidioc_g_fbuf(file, fh, arg);
997 if (!ret) {
998 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
999 p->capability, p->flags,
1000 (unsigned long)p->base);
1001 v4l_print_pix_fmt(vfd, &p->fmt);
1002 }
1003 break;
1004 }
1005 case VIDIOC_S_FBUF:
1006 {
1007 struct v4l2_framebuffer *p = arg;
1008
1009 if (!ops->vidioc_s_fbuf)
1010 break;
1011 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1012 p->capability, p->flags, (unsigned long)p->base);
1013 v4l_print_pix_fmt(vfd, &p->fmt);
1014 ret = ops->vidioc_s_fbuf(file, fh, arg);
1015 break;
1016 }
1017 case VIDIOC_STREAMON:
1018 {
1019 enum v4l2_buf_type i = *(int *)arg;
1020
1021 if (!ops->vidioc_streamon)
1022 break;
1023 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1024 ret = ops->vidioc_streamon(file, fh, i);
1025 break;
1026 }
1027 case VIDIOC_STREAMOFF:
1028 {
1029 enum v4l2_buf_type i = *(int *)arg;
1030
1031 if (!ops->vidioc_streamoff)
1032 break;
1033 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1034 ret = ops->vidioc_streamoff(file, fh, i);
1035 break;
1036 }
1037 /* ---------- tv norms ---------- */
1038 case VIDIOC_ENUMSTD:
1039 {
1040 struct v4l2_standard *p = arg;
1041 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1042 unsigned int index = p->index, i, j = 0;
1043 const char *descr = "";
1044
1045 /* Return norm array in a canonical way */
1046 for (i = 0; i <= index && id; i++) {
1047 /* last std value in the standards array is 0, so this
1048 while always ends there since (id & 0) == 0. */
1049 while ((id & standards[j].std) != standards[j].std)
1050 j++;
1051 curr_id = standards[j].std;
1052 descr = standards[j].descr;
1053 j++;
1054 if (curr_id == 0)
1055 break;
1056 if (curr_id != V4L2_STD_PAL &&
1057 curr_id != V4L2_STD_SECAM &&
1058 curr_id != V4L2_STD_NTSC)
1059 id &= ~curr_id;
1060 }
1061 if (i <= index)
1062 return -EINVAL;
1063
1064 v4l2_video_std_construct(p, curr_id, descr);
1065
1066 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1067 "framelines=%d\n", p->index,
1068 (unsigned long long)p->id, p->name,
1069 p->frameperiod.numerator,
1070 p->frameperiod.denominator,
1071 p->framelines);
1072
1073 ret = 0;
1074 break;
1075 }
1076 case VIDIOC_G_STD:
1077 {
1078 v4l2_std_id *id = arg;
1079
1080 ret = 0;
1081 /* Calls the specific handler */
1082 if (ops->vidioc_g_std)
1083 ret = ops->vidioc_g_std(file, fh, id);
1084 else if (vfd->current_norm)
1085 *id = vfd->current_norm;
1086 else
1087 ret = -EINVAL;
1088
1089 if (!ret)
1090 dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1091 break;
1092 }
1093 case VIDIOC_S_STD:
1094 {
1095 v4l2_std_id *id = arg, norm;
1096
1097 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1098
1099 norm = (*id) & vfd->tvnorms;
1100 if (vfd->tvnorms && !norm) /* Check if std is supported */
1101 break;
1102
1103 /* Calls the specific handler */
1104 if (ops->vidioc_s_std)
1105 ret = ops->vidioc_s_std(file, fh, &norm);
1106 else
1107 ret = -EINVAL;
1108
1109 /* Updates standard information */
1110 if (ret >= 0)
1111 vfd->current_norm = norm;
1112 break;
1113 }
1114 case VIDIOC_QUERYSTD:
1115 {
1116 v4l2_std_id *p = arg;
1117
1118 if (!ops->vidioc_querystd)
1119 break;
1120 ret = ops->vidioc_querystd(file, fh, arg);
1121 if (!ret)
1122 dbgarg(cmd, "detected std=%08Lx\n",
1123 (unsigned long long)*p);
1124 break;
1125 }
1126 /* ------ input switching ---------- */
1127 /* FIXME: Inputs can be handled inside videodev2 */
1128 case VIDIOC_ENUMINPUT:
1129 {
1130 struct v4l2_input *p = arg;
1131
1132 if (!ops->vidioc_enum_input)
1133 break;
1134
1135 ret = ops->vidioc_enum_input(file, fh, p);
1136 if (!ret)
1137 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1138 "audioset=%d, "
1139 "tuner=%d, std=%08Lx, status=%d\n",
1140 p->index, p->name, p->type, p->audioset,
1141 p->tuner,
1142 (unsigned long long)p->std,
1143 p->status);
1144 break;
1145 }
1146 case VIDIOC_G_INPUT:
1147 {
1148 unsigned int *i = arg;
1149
1150 if (!ops->vidioc_g_input)
1151 break;
1152 ret = ops->vidioc_g_input(file, fh, i);
1153 if (!ret)
1154 dbgarg(cmd, "value=%d\n", *i);
1155 break;
1156 }
1157 case VIDIOC_S_INPUT:
1158 {
1159 unsigned int *i = arg;
1160
1161 if (!ops->vidioc_s_input)
1162 break;
1163 dbgarg(cmd, "value=%d\n", *i);
1164 ret = ops->vidioc_s_input(file, fh, *i);
1165 break;
1166 }
1167
1168 /* ------ output switching ---------- */
1169 case VIDIOC_ENUMOUTPUT:
1170 {
1171 struct v4l2_output *p = arg;
1172
1173 if (!ops->vidioc_enum_output)
1174 break;
1175
1176 ret = ops->vidioc_enum_output(file, fh, p);
1177 if (!ret)
1178 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1179 "audioset=0x%x, "
1180 "modulator=%d, std=0x%08Lx\n",
1181 p->index, p->name, p->type, p->audioset,
1182 p->modulator, (unsigned long long)p->std);
1183 break;
1184 }
1185 case VIDIOC_G_OUTPUT:
1186 {
1187 unsigned int *i = arg;
1188
1189 if (!ops->vidioc_g_output)
1190 break;
1191 ret = ops->vidioc_g_output(file, fh, i);
1192 if (!ret)
1193 dbgarg(cmd, "value=%d\n", *i);
1194 break;
1195 }
1196 case VIDIOC_S_OUTPUT:
1197 {
1198 unsigned int *i = arg;
1199
1200 if (!ops->vidioc_s_output)
1201 break;
1202 dbgarg(cmd, "value=%d\n", *i);
1203 ret = ops->vidioc_s_output(file, fh, *i);
1204 break;
1205 }
1206
1207 /* --- controls ---------------------------------------------- */
1208 case VIDIOC_QUERYCTRL:
1209 {
1210 struct v4l2_queryctrl *p = arg;
1211
1212 if (!ops->vidioc_queryctrl)
1213 break;
1214 ret = ops->vidioc_queryctrl(file, fh, p);
1215 if (!ret)
1216 dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1217 "step=%d, default=%d, flags=0x%08x\n",
1218 p->id, p->type, p->name,
1219 p->minimum, p->maximum,
1220 p->step, p->default_value, p->flags);
1221 else
1222 dbgarg(cmd, "id=0x%x\n", p->id);
1223 break;
1224 }
1225 case VIDIOC_G_CTRL:
1226 {
1227 struct v4l2_control *p = arg;
1228
1229 if (ops->vidioc_g_ctrl)
1230 ret = ops->vidioc_g_ctrl(file, fh, p);
1231 else if (ops->vidioc_g_ext_ctrls) {
1232 struct v4l2_ext_controls ctrls;
1233 struct v4l2_ext_control ctrl;
1234
1235 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1236 ctrls.count = 1;
1237 ctrls.controls = &ctrl;
1238 ctrl.id = p->id;
1239 ctrl.value = p->value;
1240 if (check_ext_ctrls(&ctrls, 1)) {
1241 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1242 if (ret == 0)
1243 p->value = ctrl.value;
1244 }
1245 } else
1246 break;
1247 if (!ret)
1248 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1249 else
1250 dbgarg(cmd, "id=0x%x\n", p->id);
1251 break;
1252 }
1253 case VIDIOC_S_CTRL:
1254 {
1255 struct v4l2_control *p = arg;
1256 struct v4l2_ext_controls ctrls;
1257 struct v4l2_ext_control ctrl;
1258
1259 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1260 break;
1261
1262 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1263
1264 if (ops->vidioc_s_ctrl) {
1265 ret = ops->vidioc_s_ctrl(file, fh, p);
1266 break;
1267 }
1268 if (!ops->vidioc_s_ext_ctrls)
1269 break;
1270
1271 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1272 ctrls.count = 1;
1273 ctrls.controls = &ctrl;
1274 ctrl.id = p->id;
1275 ctrl.value = p->value;
1276 if (check_ext_ctrls(&ctrls, 1))
1277 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1278 break;
1279 }
1280 case VIDIOC_G_EXT_CTRLS:
1281 {
1282 struct v4l2_ext_controls *p = arg;
1283
1284 p->error_idx = p->count;
1285 if (!ops->vidioc_g_ext_ctrls)
1286 break;
1287 if (check_ext_ctrls(p, 0))
1288 ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1289 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1290 break;
1291 }
1292 case VIDIOC_S_EXT_CTRLS:
1293 {
1294 struct v4l2_ext_controls *p = arg;
1295
1296 p->error_idx = p->count;
1297 if (!ops->vidioc_s_ext_ctrls)
1298 break;
1299 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1300 if (check_ext_ctrls(p, 0))
1301 ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1302 break;
1303 }
1304 case VIDIOC_TRY_EXT_CTRLS:
1305 {
1306 struct v4l2_ext_controls *p = arg;
1307
1308 p->error_idx = p->count;
1309 if (!ops->vidioc_try_ext_ctrls)
1310 break;
1311 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1312 if (check_ext_ctrls(p, 0))
1313 ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1314 break;
1315 }
1316 case VIDIOC_QUERYMENU:
1317 {
1318 struct v4l2_querymenu *p = arg;
1319
1320 if (!ops->vidioc_querymenu)
1321 break;
1322 ret = ops->vidioc_querymenu(file, fh, p);
1323 if (!ret)
1324 dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1325 p->id, p->index, p->name);
1326 else
1327 dbgarg(cmd, "id=0x%x, index=%d\n",
1328 p->id, p->index);
1329 break;
1330 }
1331 /* --- audio ---------------------------------------------- */
1332 case VIDIOC_ENUMAUDIO:
1333 {
1334 struct v4l2_audio *p = arg;
1335
1336 if (!ops->vidioc_enumaudio)
1337 break;
1338 ret = ops->vidioc_enumaudio(file, fh, p);
1339 if (!ret)
1340 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1341 "mode=0x%x\n", p->index, p->name,
1342 p->capability, p->mode);
1343 else
1344 dbgarg(cmd, "index=%d\n", p->index);
1345 break;
1346 }
1347 case VIDIOC_G_AUDIO:
1348 {
1349 struct v4l2_audio *p = arg;
1350
1351 if (!ops->vidioc_g_audio)
1352 break;
1353
1354 ret = ops->vidioc_g_audio(file, fh, p);
1355 if (!ret)
1356 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1357 "mode=0x%x\n", p->index,
1358 p->name, p->capability, p->mode);
1359 else
1360 dbgarg(cmd, "index=%d\n", p->index);
1361 break;
1362 }
1363 case VIDIOC_S_AUDIO:
1364 {
1365 struct v4l2_audio *p = arg;
1366
1367 if (!ops->vidioc_s_audio)
1368 break;
1369 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1370 "mode=0x%x\n", p->index, p->name,
1371 p->capability, p->mode);
1372 ret = ops->vidioc_s_audio(file, fh, p);
1373 break;
1374 }
1375 case VIDIOC_ENUMAUDOUT:
1376 {
1377 struct v4l2_audioout *p = arg;
1378
1379 if (!ops->vidioc_enumaudout)
1380 break;
1381 dbgarg(cmd, "Enum for index=%d\n", p->index);
1382 ret = ops->vidioc_enumaudout(file, fh, p);
1383 if (!ret)
1384 dbgarg2("index=%d, name=%s, capability=%d, "
1385 "mode=%d\n", p->index, p->name,
1386 p->capability, p->mode);
1387 break;
1388 }
1389 case VIDIOC_G_AUDOUT:
1390 {
1391 struct v4l2_audioout *p = arg;
1392
1393 if (!ops->vidioc_g_audout)
1394 break;
1395
1396 ret = ops->vidioc_g_audout(file, fh, p);
1397 if (!ret)
1398 dbgarg2("index=%d, name=%s, capability=%d, "
1399 "mode=%d\n", p->index, p->name,
1400 p->capability, p->mode);
1401 break;
1402 }
1403 case VIDIOC_S_AUDOUT:
1404 {
1405 struct v4l2_audioout *p = arg;
1406
1407 if (!ops->vidioc_s_audout)
1408 break;
1409 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1410 "mode=%d\n", p->index, p->name,
1411 p->capability, p->mode);
1412
1413 ret = ops->vidioc_s_audout(file, fh, p);
1414 break;
1415 }
1416 case VIDIOC_G_MODULATOR:
1417 {
1418 struct v4l2_modulator *p = arg;
1419
1420 if (!ops->vidioc_g_modulator)
1421 break;
1422 ret = ops->vidioc_g_modulator(file, fh, p);
1423 if (!ret)
1424 dbgarg(cmd, "index=%d, name=%s, "
1425 "capability=%d, rangelow=%d,"
1426 " rangehigh=%d, txsubchans=%d\n",
1427 p->index, p->name, p->capability,
1428 p->rangelow, p->rangehigh,
1429 p->txsubchans);
1430 break;
1431 }
1432 case VIDIOC_S_MODULATOR:
1433 {
1434 struct v4l2_modulator *p = arg;
1435
1436 if (!ops->vidioc_s_modulator)
1437 break;
1438 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1439 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1440 p->index, p->name, p->capability, p->rangelow,
1441 p->rangehigh, p->txsubchans);
1442 ret = ops->vidioc_s_modulator(file, fh, p);
1443 break;
1444 }
1445 case VIDIOC_G_CROP:
1446 {
1447 struct v4l2_crop *p = arg;
1448
1449 if (!ops->vidioc_g_crop)
1450 break;
1451
1452 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1453 ret = ops->vidioc_g_crop(file, fh, p);
1454 if (!ret)
1455 dbgrect(vfd, "", &p->c);
1456 break;
1457 }
1458 case VIDIOC_S_CROP:
1459 {
1460 struct v4l2_crop *p = arg;
1461
1462 if (!ops->vidioc_s_crop)
1463 break;
1464 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1465 dbgrect(vfd, "", &p->c);
1466 ret = ops->vidioc_s_crop(file, fh, p);
1467 break;
1468 }
1469 case VIDIOC_CROPCAP:
1470 {
1471 struct v4l2_cropcap *p = arg;
1472
1473 /*FIXME: Should also show v4l2_fract pixelaspect */
1474 if (!ops->vidioc_cropcap)
1475 break;
1476
1477 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1478 ret = ops->vidioc_cropcap(file, fh, p);
1479 if (!ret) {
1480 dbgrect(vfd, "bounds ", &p->bounds);
1481 dbgrect(vfd, "defrect ", &p->defrect);
1482 }
1483 break;
1484 }
1485 case VIDIOC_G_JPEGCOMP:
1486 {
1487 struct v4l2_jpegcompression *p = arg;
1488
1489 if (!ops->vidioc_g_jpegcomp)
1490 break;
1491
1492 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1493 if (!ret)
1494 dbgarg(cmd, "quality=%d, APPn=%d, "
1495 "APP_len=%d, COM_len=%d, "
1496 "jpeg_markers=%d\n",
1497 p->quality, p->APPn, p->APP_len,
1498 p->COM_len, p->jpeg_markers);
1499 break;
1500 }
1501 case VIDIOC_S_JPEGCOMP:
1502 {
1503 struct v4l2_jpegcompression *p = arg;
1504
1505 if (!ops->vidioc_g_jpegcomp)
1506 break;
1507 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1508 "COM_len=%d, jpeg_markers=%d\n",
1509 p->quality, p->APPn, p->APP_len,
1510 p->COM_len, p->jpeg_markers);
1511 ret = ops->vidioc_s_jpegcomp(file, fh, p);
1512 break;
1513 }
1514 case VIDIOC_G_ENC_INDEX:
1515 {
1516 struct v4l2_enc_idx *p = arg;
1517
1518 if (!ops->vidioc_g_enc_index)
1519 break;
1520 ret = ops->vidioc_g_enc_index(file, fh, p);
1521 if (!ret)
1522 dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1523 p->entries, p->entries_cap);
1524 break;
1525 }
1526 case VIDIOC_ENCODER_CMD:
1527 {
1528 struct v4l2_encoder_cmd *p = arg;
1529
1530 if (!ops->vidioc_encoder_cmd)
1531 break;
1532 ret = ops->vidioc_encoder_cmd(file, fh, p);
1533 if (!ret)
1534 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1535 break;
1536 }
1537 case VIDIOC_TRY_ENCODER_CMD:
1538 {
1539 struct v4l2_encoder_cmd *p = arg;
1540
1541 if (!ops->vidioc_try_encoder_cmd)
1542 break;
1543 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1544 if (!ret)
1545 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1546 break;
1547 }
1548 case VIDIOC_G_PARM:
1549 {
1550 struct v4l2_streamparm *p = arg;
1551
1552 if (ops->vidioc_g_parm) {
1553 ret = check_fmt(ops, p->type);
1554 if (ret)
1555 break;
1556 ret = ops->vidioc_g_parm(file, fh, p);
1557 } else {
1558 v4l2_std_id std = vfd->current_norm;
1559
1560 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1561 return -EINVAL;
1562
1563 ret = 0;
1564 if (ops->vidioc_g_std)
1565 ret = ops->vidioc_g_std(file, fh, &std);
1566 else if (std == 0)
1567 ret = -EINVAL;
1568 if (ret == 0)
1569 v4l2_video_std_frame_period(std,
1570 &p->parm.capture.timeperframe);
1571 }
1572
1573 dbgarg(cmd, "type=%d\n", p->type);
1574 break;
1575 }
1576 case VIDIOC_S_PARM:
1577 {
1578 struct v4l2_streamparm *p = arg;
1579
1580 if (!ops->vidioc_s_parm)
1581 break;
1582 ret = check_fmt(ops, p->type);
1583 if (ret)
1584 break;
1585
1586 dbgarg(cmd, "type=%d\n", p->type);
1587 ret = ops->vidioc_s_parm(file, fh, p);
1588 break;
1589 }
1590 case VIDIOC_G_TUNER:
1591 {
1592 struct v4l2_tuner *p = arg;
1593
1594 if (!ops->vidioc_g_tuner)
1595 break;
1596
1597 ret = ops->vidioc_g_tuner(file, fh, p);
1598 if (!ret)
1599 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1600 "capability=0x%x, rangelow=%d, "
1601 "rangehigh=%d, signal=%d, afc=%d, "
1602 "rxsubchans=0x%x, audmode=%d\n",
1603 p->index, p->name, p->type,
1604 p->capability, p->rangelow,
1605 p->rangehigh, p->signal, p->afc,
1606 p->rxsubchans, p->audmode);
1607 break;
1608 }
1609 case VIDIOC_S_TUNER:
1610 {
1611 struct v4l2_tuner *p = arg;
1612
1613 if (!ops->vidioc_s_tuner)
1614 break;
1615 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1616 "capability=0x%x, rangelow=%d, "
1617 "rangehigh=%d, signal=%d, afc=%d, "
1618 "rxsubchans=0x%x, audmode=%d\n",
1619 p->index, p->name, p->type,
1620 p->capability, p->rangelow,
1621 p->rangehigh, p->signal, p->afc,
1622 p->rxsubchans, p->audmode);
1623 ret = ops->vidioc_s_tuner(file, fh, p);
1624 break;
1625 }
1626 case VIDIOC_G_FREQUENCY:
1627 {
1628 struct v4l2_frequency *p = arg;
1629
1630 if (!ops->vidioc_g_frequency)
1631 break;
1632
1633 ret = ops->vidioc_g_frequency(file, fh, p);
1634 if (!ret)
1635 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1636 p->tuner, p->type, p->frequency);
1637 break;
1638 }
1639 case VIDIOC_S_FREQUENCY:
1640 {
1641 struct v4l2_frequency *p = arg;
1642
1643 if (!ops->vidioc_s_frequency)
1644 break;
1645 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1646 p->tuner, p->type, p->frequency);
1647 ret = ops->vidioc_s_frequency(file, fh, p);
1648 break;
1649 }
1650 case VIDIOC_G_SLICED_VBI_CAP:
1651 {
1652 struct v4l2_sliced_vbi_cap *p = arg;
1653
1654 if (!ops->vidioc_g_sliced_vbi_cap)
1655 break;
1656
1657 /* Clear up to type, everything after type is zerod already */
1658 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1659
1660 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1661 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1662 if (!ret)
1663 dbgarg2("service_set=%d\n", p->service_set);
1664 break;
1665 }
1666 case VIDIOC_LOG_STATUS:
1667 {
1668 if (!ops->vidioc_log_status)
1669 break;
1670 ret = ops->vidioc_log_status(file, fh);
1671 break;
1672 }
1673 #ifdef CONFIG_VIDEO_ADV_DEBUG
1674 case VIDIOC_DBG_G_REGISTER:
1675 {
1676 struct v4l2_dbg_register *p = arg;
1677
1678 if (!capable(CAP_SYS_ADMIN))
1679 ret = -EPERM;
1680 else if (ops->vidioc_g_register)
1681 ret = ops->vidioc_g_register(file, fh, p);
1682 break;
1683 }
1684 case VIDIOC_DBG_S_REGISTER:
1685 {
1686 struct v4l2_dbg_register *p = arg;
1687
1688 if (!capable(CAP_SYS_ADMIN))
1689 ret = -EPERM;
1690 else if (ops->vidioc_s_register)
1691 ret = ops->vidioc_s_register(file, fh, p);
1692 break;
1693 }
1694 #endif
1695 case VIDIOC_DBG_G_CHIP_IDENT:
1696 {
1697 struct v4l2_dbg_chip_ident *p = arg;
1698
1699 if (!ops->vidioc_g_chip_ident)
1700 break;
1701 p->ident = V4L2_IDENT_NONE;
1702 p->revision = 0;
1703 ret = ops->vidioc_g_chip_ident(file, fh, p);
1704 if (!ret)
1705 dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1706 break;
1707 }
1708 case VIDIOC_S_HW_FREQ_SEEK:
1709 {
1710 struct v4l2_hw_freq_seek *p = arg;
1711
1712 if (!ops->vidioc_s_hw_freq_seek)
1713 break;
1714 dbgarg(cmd,
1715 "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1716 p->tuner, p->type, p->seek_upward, p->wrap_around);
1717 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1718 break;
1719 }
1720 case VIDIOC_ENUM_FRAMESIZES:
1721 {
1722 struct v4l2_frmsizeenum *p = arg;
1723
1724 if (!ops->vidioc_enum_framesizes)
1725 break;
1726
1727 ret = ops->vidioc_enum_framesizes(file, fh, p);
1728 dbgarg(cmd,
1729 "index=%d, pixelformat=%d, type=%d ",
1730 p->index, p->pixel_format, p->type);
1731 switch (p->type) {
1732 case V4L2_FRMSIZE_TYPE_DISCRETE:
1733 dbgarg2("width = %d, height=%d\n",
1734 p->discrete.width, p->discrete.height);
1735 break;
1736 case V4L2_FRMSIZE_TYPE_STEPWISE:
1737 dbgarg2("min %dx%d, max %dx%d, step %dx%d\n",
1738 p->stepwise.min_width, p->stepwise.min_height,
1739 p->stepwise.step_width, p->stepwise.step_height,
1740 p->stepwise.max_width, p->stepwise.max_height);
1741 break;
1742 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1743 dbgarg2("continuous\n");
1744 break;
1745 default:
1746 dbgarg2("- Unknown type!\n");
1747 }
1748
1749 break;
1750 }
1751 case VIDIOC_ENUM_FRAMEINTERVALS:
1752 {
1753 struct v4l2_frmivalenum *p = arg;
1754
1755 if (!ops->vidioc_enum_frameintervals)
1756 break;
1757
1758 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1759 dbgarg(cmd,
1760 "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1761 p->index, p->pixel_format,
1762 p->width, p->height, p->type);
1763 switch (p->type) {
1764 case V4L2_FRMIVAL_TYPE_DISCRETE:
1765 dbgarg2("fps=%d/%d\n",
1766 p->discrete.numerator,
1767 p->discrete.denominator);
1768 break;
1769 case V4L2_FRMIVAL_TYPE_STEPWISE:
1770 dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1771 p->stepwise.min.numerator,
1772 p->stepwise.min.denominator,
1773 p->stepwise.max.numerator,
1774 p->stepwise.max.denominator,
1775 p->stepwise.step.numerator,
1776 p->stepwise.step.denominator);
1777 break;
1778 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1779 dbgarg2("continuous\n");
1780 break;
1781 default:
1782 dbgarg2("- Unknown type!\n");
1783 }
1784 break;
1785 }
1786
1787 default:
1788 {
1789 if (!ops->vidioc_default)
1790 break;
1791 ret = ops->vidioc_default(file, fh, cmd, arg);
1792 break;
1793 }
1794 } /* switch */
1795
1796 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1797 if (ret < 0) {
1798 v4l_print_ioctl(vfd->name, cmd);
1799 printk(KERN_CONT " error %ld\n", ret);
1800 }
1801 }
1802
1803 return ret;
1804 }
1805
1806 /* In some cases, only a few fields are used as input, i.e. when the app sets
1807 * "index" and then the driver fills in the rest of the structure for the thing
1808 * with that index. We only need to copy up the first non-input field. */
1809 static unsigned long cmd_input_size(unsigned int cmd)
1810 {
1811 /* Size of structure up to and including 'field' */
1812 #define CMDINSIZE(cmd, type, field) \
1813 case VIDIOC_##cmd: \
1814 return offsetof(struct v4l2_##type, field) + \
1815 sizeof(((struct v4l2_##type *)0)->field);
1816
1817 switch (cmd) {
1818 CMDINSIZE(ENUM_FMT, fmtdesc, type);
1819 CMDINSIZE(G_FMT, format, type);
1820 CMDINSIZE(QUERYBUF, buffer, type);
1821 CMDINSIZE(G_PARM, streamparm, type);
1822 CMDINSIZE(ENUMSTD, standard, index);
1823 CMDINSIZE(ENUMINPUT, input, index);
1824 CMDINSIZE(G_CTRL, control, id);
1825 CMDINSIZE(G_TUNER, tuner, index);
1826 CMDINSIZE(QUERYCTRL, queryctrl, id);
1827 CMDINSIZE(QUERYMENU, querymenu, index);
1828 CMDINSIZE(ENUMOUTPUT, output, index);
1829 CMDINSIZE(G_MODULATOR, modulator, index);
1830 CMDINSIZE(G_FREQUENCY, frequency, tuner);
1831 CMDINSIZE(CROPCAP, cropcap, type);
1832 CMDINSIZE(G_CROP, crop, type);
1833 CMDINSIZE(ENUMAUDIO, audio, index);
1834 CMDINSIZE(ENUMAUDOUT, audioout, index);
1835 CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
1836 CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
1837 CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
1838 CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
1839 CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
1840 default:
1841 return _IOC_SIZE(cmd);
1842 }
1843 }
1844
1845 long video_ioctl2(struct file *file,
1846 unsigned int cmd, unsigned long arg)
1847 {
1848 char sbuf[128];
1849 void *mbuf = NULL;
1850 void *parg = NULL;
1851 long err = -EINVAL;
1852 int is_ext_ctrl;
1853 size_t ctrls_size = 0;
1854 void __user *user_ptr = NULL;
1855
1856 #ifdef __OLD_VIDIOC_
1857 cmd = video_fix_command(cmd);
1858 #endif
1859 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1860 cmd == VIDIOC_TRY_EXT_CTRLS);
1861
1862 /* Copy arguments into temp kernel buffer */
1863 if (_IOC_DIR(cmd) != _IOC_NONE) {
1864 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1865 parg = sbuf;
1866 } else {
1867 /* too big to allocate from stack */
1868 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1869 if (NULL == mbuf)
1870 return -ENOMEM;
1871 parg = mbuf;
1872 }
1873
1874 err = -EFAULT;
1875 if (_IOC_DIR(cmd) & _IOC_WRITE) {
1876 unsigned long n = cmd_input_size(cmd);
1877
1878 if (copy_from_user(parg, (void __user *)arg, n))
1879 goto out;
1880
1881 /* zero out anything we don't copy from userspace */
1882 if (n < _IOC_SIZE(cmd))
1883 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
1884 } else {
1885 /* read-only ioctl */
1886 memset(parg, 0, _IOC_SIZE(cmd));
1887 }
1888 }
1889
1890 if (is_ext_ctrl) {
1891 struct v4l2_ext_controls *p = parg;
1892
1893 /* In case of an error, tell the caller that it wasn't
1894 a specific control that caused it. */
1895 p->error_idx = p->count;
1896 user_ptr = (void __user *)p->controls;
1897 if (p->count) {
1898 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1899 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1900 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1901 err = -ENOMEM;
1902 if (NULL == mbuf)
1903 goto out_ext_ctrl;
1904 err = -EFAULT;
1905 if (copy_from_user(mbuf, user_ptr, ctrls_size))
1906 goto out_ext_ctrl;
1907 p->controls = mbuf;
1908 }
1909 }
1910
1911 /* Handles IOCTL */
1912 err = __video_do_ioctl(file, cmd, parg);
1913 if (err == -ENOIOCTLCMD)
1914 err = -EINVAL;
1915 if (is_ext_ctrl) {
1916 struct v4l2_ext_controls *p = parg;
1917
1918 p->controls = (void *)user_ptr;
1919 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1920 err = -EFAULT;
1921 goto out_ext_ctrl;
1922 }
1923 if (err < 0)
1924 goto out;
1925
1926 out_ext_ctrl:
1927 /* Copy results into user buffer */
1928 switch (_IOC_DIR(cmd)) {
1929 case _IOC_READ:
1930 case (_IOC_WRITE | _IOC_READ):
1931 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1932 err = -EFAULT;
1933 break;
1934 }
1935
1936 out:
1937 kfree(mbuf);
1938 return err;
1939 }
1940 EXPORT_SYMBOL(video_ioctl2);
kernel source for telekom puls (alcatel/mediatek)