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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-block.git] / drivers / media / video / v4l2-ioctl.c
CommitLineData
35ea11ff
HV		 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 *
d9b01449 11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
35ea11ff
HV		 12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
13 */
14
15#include <linux/module.h>
5a0e3ad6 16#include <linux/slab.h>
35ea11ff
HV		 17#include <linux/types.h>
18#include <linux/kernel.h>
19
20#define __OLD_VIDIOC_ /* To allow fixing old calls */
7e0a16f6 21#include <linux/videodev.h>
35ea11ff
HV		 22#include <linux/videodev2.h>
23
24#ifdef CONFIG_VIDEO_V4L1
25#include <linux/videodev.h>
26#endif
27#include <media/v4l2-common.h>
28#include <media/v4l2-ioctl.h>
80b36e0f 29#include <media/v4l2-chip-ident.h>
35ea11ff
HV		 30
31#define dbgarg(cmd, fmt, arg...) \
32 do { \
33 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \
34 printk(KERN_DEBUG "%s: ", vfd->name); \
35 v4l_printk_ioctl(cmd); \
36 printk(" " fmt, ## arg); \
37 } \
38 } while (0)
39
40#define dbgarg2(fmt, arg...) \
41 do { \
42 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
43 printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
44 } while (0)
45
d33fbcbb
MCC		 46#define dbgarg3(fmt, arg...) \
47 do { \
48 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
49 printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
50 } while (0)
51
7ecc0cf9
TP		 52/* Zero out the end of the struct pointed to by p. Everthing after, but
53 * not including, the specified field is cleared. */
54#define CLEAR_AFTER_FIELD(p, field) \
55 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
56 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
57
35ea11ff
HV		 58struct std_descr {
59 v4l2_std_id std;
60 const char *descr;
61};
62
63static const struct std_descr standards[] = {
64 { V4L2_STD_NTSC, "NTSC" },
65 { V4L2_STD_NTSC_M, "NTSC-M" },
66 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
67 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
68 { V4L2_STD_NTSC_443, "NTSC-443" },
69 { V4L2_STD_PAL, "PAL" },
70 { V4L2_STD_PAL_BG, "PAL-BG" },
71 { V4L2_STD_PAL_B, "PAL-B" },
72 { V4L2_STD_PAL_B1, "PAL-B1" },
73 { V4L2_STD_PAL_G, "PAL-G" },
74 { V4L2_STD_PAL_H, "PAL-H" },
75 { V4L2_STD_PAL_I, "PAL-I" },
76 { V4L2_STD_PAL_DK, "PAL-DK" },
77 { V4L2_STD_PAL_D, "PAL-D" },
78 { V4L2_STD_PAL_D1, "PAL-D1" },
79 { V4L2_STD_PAL_K, "PAL-K" },
80 { V4L2_STD_PAL_M, "PAL-M" },
81 { V4L2_STD_PAL_N, "PAL-N" },
82 { V4L2_STD_PAL_Nc, "PAL-Nc" },
83 { V4L2_STD_PAL_60, "PAL-60" },
84 { V4L2_STD_SECAM, "SECAM" },
85 { V4L2_STD_SECAM_B, "SECAM-B" },
86 { V4L2_STD_SECAM_G, "SECAM-G" },
87 { V4L2_STD_SECAM_H, "SECAM-H" },
88 { V4L2_STD_SECAM_DK, "SECAM-DK" },
89 { V4L2_STD_SECAM_D, "SECAM-D" },
90 { V4L2_STD_SECAM_K, "SECAM-K" },
91 { V4L2_STD_SECAM_K1, "SECAM-K1" },
92 { V4L2_STD_SECAM_L, "SECAM-L" },
93 { V4L2_STD_SECAM_LC, "SECAM-Lc" },
94 { 0, "Unknown" }
95};
96
97/* video4linux standard ID conversion to standard name
98 */
99const char *v4l2_norm_to_name(v4l2_std_id id)
100{
101 u32 myid = id;
102 int i;
103
104 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
105 64 bit comparations. So, on that architecture, with some gcc
106 variants, compilation fails. Currently, the max value is 30bit wide.
107 */
108 BUG_ON(myid != id);
109
110 for (i = 0; standards[i].std; i++)
111 if (myid == standards[i].std)
112 break;
113 return standards[i].descr;
114}
115EXPORT_SYMBOL(v4l2_norm_to_name);
116
51f0b8d5
TP		 117/* Returns frame period for the given standard */
118void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
119{
120 if (id & V4L2_STD_525_60) {
121 frameperiod->numerator = 1001;
122 frameperiod->denominator = 30000;
123 } else {
124 frameperiod->numerator = 1;
125 frameperiod->denominator = 25;
126 }
127}
128EXPORT_SYMBOL(v4l2_video_std_frame_period);
129
35ea11ff
HV		 130/* Fill in the fields of a v4l2_standard structure according to the
131 'id' and 'transmission' parameters. Returns negative on error. */
132int v4l2_video_std_construct(struct v4l2_standard *vs,
133 int id, const char *name)
134{
51f0b8d5
TP		 135 vs->id = id;
136 v4l2_video_std_frame_period(id, &vs->frameperiod);
137 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
35ea11ff
HV		 138 strlcpy(vs->name, name, sizeof(vs->name));
139 return 0;
140}
141EXPORT_SYMBOL(v4l2_video_std_construct);
142
143/* ----------------------------------------------------------------- */
144/* some arrays for pretty-printing debug messages of enum types */
145
146const char *v4l2_field_names[] = {
147 [V4L2_FIELD_ANY] = "any",
148 [V4L2_FIELD_NONE] = "none",
149 [V4L2_FIELD_TOP] = "top",
150 [V4L2_FIELD_BOTTOM] = "bottom",
151 [V4L2_FIELD_INTERLACED] = "interlaced",
152 [V4L2_FIELD_SEQ_TB] = "seq-tb",
153 [V4L2_FIELD_SEQ_BT] = "seq-bt",
154 [V4L2_FIELD_ALTERNATE] = "alternate",
155 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
156 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
157};
158EXPORT_SYMBOL(v4l2_field_names);
159
160const char *v4l2_type_names[] = {
161 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
162 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
163 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
164 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
165 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
166 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
167 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
168 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
169};
170EXPORT_SYMBOL(v4l2_type_names);
171
172static const char *v4l2_memory_names[] = {
173 [V4L2_MEMORY_MMAP] = "mmap",
174 [V4L2_MEMORY_USERPTR] = "userptr",
175 [V4L2_MEMORY_OVERLAY] = "overlay",
176};
177
178#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
179 arr[a] : "unknown")
180
181/* ------------------------------------------------------------------ */
182/* debug help functions */
183
184#ifdef CONFIG_VIDEO_V4L1_COMPAT
185static const char *v4l1_ioctls[] = {
186 [_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
187 [_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
188 [_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
189 [_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
190 [_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
191 [_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
192 [_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
193 [_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
194 [_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
195 [_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
196 [_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
197 [_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
198 [_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
199 [_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
200 [_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
201 [_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
202 [_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
203 [_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
204 [_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
205 [_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
206 [_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
207 [_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
208 [_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
209 [_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
210 [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
211 [_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
212 [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
213 [_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
214 [_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
215};
216#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
217#endif
218
219static const char *v4l2_ioctls[] = {
220 [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
221 [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
222 [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
223 [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
224 [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
225 [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
226 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
227 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
228 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
229 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
230 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
231 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
232 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
233 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
234 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
235 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
236 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
237 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
238 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
239 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
240 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
241 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
242 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
243 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
244 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
245 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
246 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
247 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
248 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
249 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
250 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
251 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
252 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
253 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
254 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
255 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
256 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
257 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
258 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
259 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
260 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
261 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
262 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
263 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
264 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
265 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
266 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
267 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
268 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
269 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
270 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
271 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
272 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
273 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
274 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
275#if 1
276 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
277 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
278 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
279 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
280 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
281
282 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
283 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
284
aecde8b5 285 [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
35ea11ff
HV		 286 [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK",
287#endif
b6456c0c
MK		 288 [_IOC_NR(VIDIOC_ENUM_DV_PRESETS)] = "VIDIOC_ENUM_DV_PRESETS",
289 [_IOC_NR(VIDIOC_S_DV_PRESET)] = "VIDIOC_S_DV_PRESET",
290 [_IOC_NR(VIDIOC_G_DV_PRESET)] = "VIDIOC_G_DV_PRESET",
291 [_IOC_NR(VIDIOC_QUERY_DV_PRESET)] = "VIDIOC_QUERY_DV_PRESET",
292 [_IOC_NR(VIDIOC_S_DV_TIMINGS)] = "VIDIOC_S_DV_TIMINGS",
293 [_IOC_NR(VIDIOC_G_DV_TIMINGS)] = "VIDIOC_G_DV_TIMINGS",
35ea11ff
HV		 294};
295#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
296
35ea11ff
HV		 297/* Common ioctl debug function. This function can be used by
298 external ioctl messages as well as internal V4L ioctl */
299void v4l_printk_ioctl(unsigned int cmd)
300{
301 char *dir, *type;
302
303 switch (_IOC_TYPE(cmd)) {
304 case 'd':
78a3b4db
HV		 305 type = "v4l2_int";
306 break;
35ea11ff
HV		 307#ifdef CONFIG_VIDEO_V4L1_COMPAT
308 case 'v':
309 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
310 type = "v4l1";
311 break;
312 }
313 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
314 return;
315#endif
316 case 'V':
317 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
318 type = "v4l2";
319 break;
320 }
321 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
322 return;
323 default:
324 type = "unknown";
325 }
326
327 switch (_IOC_DIR(cmd)) {
328 case _IOC_NONE: dir = "--"; break;
329 case _IOC_READ: dir = "r-"; break;
330 case _IOC_WRITE: dir = "-w"; break;
331 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
332 default: dir = "*ERR*"; break;
333 }
334 printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
335 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
336}
337EXPORT_SYMBOL(v4l_printk_ioctl);
338
339/*
340 * helper function -- handles userspace copying for ioctl arguments
341 */
342
343#ifdef __OLD_VIDIOC_
344static unsigned int
345video_fix_command(unsigned int cmd)
346{
347 switch (cmd) {
348 case VIDIOC_OVERLAY_OLD:
349 cmd = VIDIOC_OVERLAY;
350 break;
351 case VIDIOC_S_PARM_OLD:
352 cmd = VIDIOC_S_PARM;
353 break;
354 case VIDIOC_S_CTRL_OLD:
355 cmd = VIDIOC_S_CTRL;
356 break;
357 case VIDIOC_G_AUDIO_OLD:
358 cmd = VIDIOC_G_AUDIO;
359 break;
360 case VIDIOC_G_AUDOUT_OLD:
361 cmd = VIDIOC_G_AUDOUT;
362 break;
363 case VIDIOC_CROPCAP_OLD:
364 cmd = VIDIOC_CROPCAP;
365 break;
366 }
367 return cmd;
368}
369#endif
370
371/*
372 * Obsolete usercopy function - Should be removed soon
373 */
069b7479 374long
f473bf76
HV		 375video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
376 v4l2_kioctl func)
35ea11ff
HV		 377{
378 char sbuf[128];
379 void *mbuf = NULL;
380 void *parg = NULL;
069b7479 381 long err = -EINVAL;
35ea11ff
HV		 382 int is_ext_ctrl;
383 size_t ctrls_size = 0;
384 void __user *user_ptr = NULL;
385
386#ifdef __OLD_VIDIOC_
387 cmd = video_fix_command(cmd);
388#endif
389 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
390 cmd == VIDIOC_TRY_EXT_CTRLS);
391
392 /* Copy arguments into temp kernel buffer */
393 switch (_IOC_DIR(cmd)) {
394 case _IOC_NONE:
395 parg = NULL;
396 break;
397 case _IOC_READ:
398 case _IOC_WRITE:
399 case (_IOC_WRITE | _IOC_READ):
400 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
401 parg = sbuf;
402 } else {
403 /* too big to allocate from stack */
404 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
405 if (NULL == mbuf)
406 return -ENOMEM;
407 parg = mbuf;
408 }
409
410 err = -EFAULT;
411 if (_IOC_DIR(cmd) & _IOC_WRITE)
412 if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
413 goto out;
414 break;
415 }
416 if (is_ext_ctrl) {
417 struct v4l2_ext_controls *p = parg;
418
419 /* In case of an error, tell the caller that it wasn't
420 a specific control that caused it. */
421 p->error_idx = p->count;
422 user_ptr = (void __user *)p->controls;
423 if (p->count) {
424 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
425 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
426 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
427 err = -ENOMEM;
428 if (NULL == mbuf)
429 goto out_ext_ctrl;
430 err = -EFAULT;
431 if (copy_from_user(mbuf, user_ptr, ctrls_size))
432 goto out_ext_ctrl;
433 p->controls = mbuf;
434 }
435 }
436
437 /* call driver */
f473bf76 438 err = func(file, cmd, parg);
35ea11ff
HV		 439 if (err == -ENOIOCTLCMD)
440 err = -EINVAL;
441 if (is_ext_ctrl) {
442 struct v4l2_ext_controls *p = parg;
443
444 p->controls = (void *)user_ptr;
445 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
446 err = -EFAULT;
447 goto out_ext_ctrl;
448 }
449 if (err < 0)
450 goto out;
451
452out_ext_ctrl:
453 /* Copy results into user buffer */
454 switch (_IOC_DIR(cmd)) {
455 case _IOC_READ:
456 case (_IOC_WRITE | _IOC_READ):
457 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
458 err = -EFAULT;
459 break;
460 }
461
462out:
463 kfree(mbuf);
464 return err;
465}
466EXPORT_SYMBOL(video_usercopy);
467
468static void dbgbuf(unsigned int cmd, struct video_device *vfd,
469 struct v4l2_buffer *p)
470{
471 struct v4l2_timecode *tc = &p->timecode;
472
473 dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
474 "bytesused=%d, flags=0x%08d, "
475 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
476 p->timestamp.tv_sec / 3600,
477 (int)(p->timestamp.tv_sec / 60) % 60,
478 (int)(p->timestamp.tv_sec % 60),
b045979d 479 (long)p->timestamp.tv_usec,
35ea11ff
HV		 480 p->index,
481 prt_names(p->type, v4l2_type_names),
482 p->bytesused, p->flags,
483 p->field, p->sequence,
484 prt_names(p->memory, v4l2_memory_names),
485 p->m.userptr, p->length);
486 dbgarg2("timecode=%02d:%02d:%02d type=%d, "
487 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
488 tc->hours, tc->minutes, tc->seconds,
489 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
490}
491
492static inline void dbgrect(struct video_device *vfd, char *s,
493 struct v4l2_rect *r)
494{
495 dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
496 r->width, r->height);
497};
498
499static inline void v4l_print_pix_fmt(struct video_device *vfd,
500 struct v4l2_pix_format *fmt)
501{
502 dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
503 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
504 fmt->width, fmt->height,
505 (fmt->pixelformat & 0xff),
506 (fmt->pixelformat >> 8) & 0xff,
507 (fmt->pixelformat >> 16) & 0xff,
508 (fmt->pixelformat >> 24) & 0xff,
509 prt_names(fmt->field, v4l2_field_names),
510 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
511};
512
513static inline void v4l_print_ext_ctrls(unsigned int cmd,
514 struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
515{
516 __u32 i;
517
518 if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
519 return;
520 dbgarg(cmd, "");
521 printk(KERN_CONT "class=0x%x", c->ctrl_class);
522 for (i = 0; i < c->count; i++) {
6b5a9492 523 if (show_vals && !c->controls[i].size)
35ea11ff
HV		 524 printk(KERN_CONT " id/val=0x%x/0x%x",
525 c->controls[i].id, c->controls[i].value);
526 else
6b5a9492
HV		 527 printk(KERN_CONT " id=0x%x,size=%u",
528 c->controls[i].id, c->controls[i].size);
35ea11ff
HV		 529 }
530 printk(KERN_CONT "\n");
531};
532
533static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
534{
535 __u32 i;
536
537 /* zero the reserved fields */
538 c->reserved[0] = c->reserved[1] = 0;
6b5a9492 539 for (i = 0; i < c->count; i++)
35ea11ff 540 c->controls[i].reserved2[0] = 0;
6b5a9492 541
35ea11ff
HV		 542 /* V4L2_CID_PRIVATE_BASE cannot be used as control class
543 when using extended controls.
544 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
545 is it allowed for backwards compatibility.
546 */
547 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
548 return 0;
549 /* Check that all controls are from the same control class. */
550 for (i = 0; i < c->count; i++) {
551 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
552 c->error_idx = i;
553 return 0;
554 }
555 }
556 return 1;
557}
558
a399810c 559static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
35ea11ff 560{
a399810c
HV		 561 if (ops == NULL)
562 return -EINVAL;
563
35ea11ff
HV		 564 switch (type) {
565 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
1175d613 566 if (ops->vidioc_g_fmt_vid_cap)
35ea11ff
HV		 567 return 0;
568 break;
569 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1175d613 570 if (ops->vidioc_g_fmt_vid_overlay)
35ea11ff
HV		 571 return 0;
572 break;
573 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1175d613 574 if (ops->vidioc_g_fmt_vid_out)
35ea11ff
HV		 575 return 0;
576 break;
577 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1175d613 578 if (ops->vidioc_g_fmt_vid_out_overlay)
35ea11ff
HV		 579 return 0;
580 break;
581 case V4L2_BUF_TYPE_VBI_CAPTURE:
1175d613 582 if (ops->vidioc_g_fmt_vbi_cap)
35ea11ff
HV		 583 return 0;
584 break;
585 case V4L2_BUF_TYPE_VBI_OUTPUT:
1175d613 586 if (ops->vidioc_g_fmt_vbi_out)
35ea11ff
HV		 587 return 0;
588 break;
589 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1175d613 590 if (ops->vidioc_g_fmt_sliced_vbi_cap)
35ea11ff
HV		 591 return 0;
592 break;
593 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1175d613 594 if (ops->vidioc_g_fmt_sliced_vbi_out)
35ea11ff
HV		 595 return 0;
596 break;
597 case V4L2_BUF_TYPE_PRIVATE:
1175d613 598 if (ops->vidioc_g_fmt_type_private)
35ea11ff
HV		 599 return 0;
600 break;
601 }
602 return -EINVAL;
603}
604
069b7479 605static long __video_do_ioctl(struct file *file,
35ea11ff
HV		 606 unsigned int cmd, void *arg)
607{
608 struct video_device *vfd = video_devdata(file);
a399810c 609 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
d5fbf32f 610 void *fh = file->private_data;
069b7479 611 long ret = -EINVAL;
35ea11ff
HV		 612
613 if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
614 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
615 v4l_print_ioctl(vfd->name, cmd);
616 printk(KERN_CONT "\n");
617 }
618
a399810c
HV		 619 if (ops == NULL) {
620 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
621 vfd->name);
622 return -EINVAL;
623 }
624
35ea11ff
HV		 625#ifdef CONFIG_VIDEO_V4L1_COMPAT
626 /***********************************************************
627 Handles calls to the obsoleted V4L1 API
628 Due to the nature of VIDIOCGMBUF, each driver that supports
629 V4L1 should implement its own handler for this ioctl.
630 ***********************************************************/
631
632 /* --- streaming capture ------------------------------------- */
633 if (cmd == VIDIOCGMBUF) {
634 struct video_mbuf *p = arg;
635
a399810c 636 if (!ops->vidiocgmbuf)
35ea11ff 637 return ret;
a399810c 638 ret = ops->vidiocgmbuf(file, fh, p);
35ea11ff
HV		 639 if (!ret)
640 dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
641 p->size, p->frames,
642 (unsigned long)p->offsets);
643 return ret;
644 }
645
646 /********************************************************
647 All other V4L1 calls are handled by v4l1_compat module.
648 Those calls will be translated into V4L2 calls, and
649 __video_do_ioctl will be called again, with one or more
650 V4L2 ioctls.
651 ********************************************************/
888fe747 652 if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
b1f88407 653 return v4l_compat_translate_ioctl(file, cmd, arg,
35ea11ff
HV		 654 __video_do_ioctl);
655#endif
656
657 switch (cmd) {
658 /* --- capabilities ------------------------------------------ */
659 case VIDIOC_QUERYCAP:
660 {
661 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
35ea11ff 662
a399810c 663 if (!ops->vidioc_querycap)
35ea11ff
HV		 664 break;
665
a399810c 666 ret = ops->vidioc_querycap(file, fh, cap);
35ea11ff
HV		 667 if (!ret)
668 dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
669 "version=0x%08x, "
670 "capabilities=0x%08x\n",
671 cap->driver, cap->card, cap->bus_info,
672 cap->version,
673 cap->capabilities);
674 break;
675 }
676
677 /* --- priority ------------------------------------------ */
678 case VIDIOC_G_PRIORITY:
679 {
680 enum v4l2_priority *p = arg;
681
a399810c 682 if (!ops->vidioc_g_priority)
35ea11ff 683 break;
a399810c 684 ret = ops->vidioc_g_priority(file, fh, p);
35ea11ff
HV		 685 if (!ret)
686 dbgarg(cmd, "priority is %d\n", *p);
687 break;
688 }
689 case VIDIOC_S_PRIORITY:
690 {
691 enum v4l2_priority *p = arg;
692
a399810c 693 if (!ops->vidioc_s_priority)
35ea11ff
HV		 694 break;
695 dbgarg(cmd, "setting priority to %d\n", *p);
a399810c 696 ret = ops->vidioc_s_priority(file, fh, *p);
35ea11ff
HV		 697 break;
698 }
699
700 /* --- capture ioctls ---------------------------------------- */
701 case VIDIOC_ENUM_FMT:
702 {
703 struct v4l2_fmtdesc *f = arg;
35ea11ff 704
19c96e4b 705 switch (f->type) {
35ea11ff 706 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
a399810c
HV		 707 if (ops->vidioc_enum_fmt_vid_cap)
708 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
35ea11ff
HV		 709 break;
710 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
a399810c
HV		 711 if (ops->vidioc_enum_fmt_vid_overlay)
712 ret = ops->vidioc_enum_fmt_vid_overlay(file,
35ea11ff
HV		 713 fh, f);
714 break;
35ea11ff 715 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
a399810c
HV		 716 if (ops->vidioc_enum_fmt_vid_out)
717 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
35ea11ff
HV		 718 break;
719 case V4L2_BUF_TYPE_PRIVATE:
a399810c
HV		 720 if (ops->vidioc_enum_fmt_type_private)
721 ret = ops->vidioc_enum_fmt_type_private(file,
35ea11ff
HV		 722 fh, f);
723 break;
724 default:
725 break;
726 }
727 if (!ret)
728 dbgarg(cmd, "index=%d, type=%d, flags=%d, "
729 "pixelformat=%c%c%c%c, description='%s'\n",
730 f->index, f->type, f->flags,
731 (f->pixelformat & 0xff),
732 (f->pixelformat >> 8) & 0xff,
733 (f->pixelformat >> 16) & 0xff,
734 (f->pixelformat >> 24) & 0xff,
735 f->description);
736 break;
737 }
738 case VIDIOC_G_FMT:
739 {
740 struct v4l2_format *f = (struct v4l2_format *)arg;
741
35ea11ff
HV		 742 /* FIXME: Should be one dump per type */
743 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
744
745 switch (f->type) {
746 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
a399810c
HV		 747 if (ops->vidioc_g_fmt_vid_cap)
748 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
35ea11ff
HV		 749 if (!ret)
750 v4l_print_pix_fmt(vfd, &f->fmt.pix);
751 break;
752 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
a399810c
HV		 753 if (ops->vidioc_g_fmt_vid_overlay)
754 ret = ops->vidioc_g_fmt_vid_overlay(file,
35ea11ff
HV		 755 fh, f);
756 break;
757 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
a399810c
HV		 758 if (ops->vidioc_g_fmt_vid_out)
759 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
35ea11ff
HV		 760 if (!ret)
761 v4l_print_pix_fmt(vfd, &f->fmt.pix);
762 break;
763 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
a399810c
HV		 764 if (ops->vidioc_g_fmt_vid_out_overlay)
765 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
35ea11ff
HV		 766 fh, f);
767 break;
768 case V4L2_BUF_TYPE_VBI_CAPTURE:
a399810c
HV		 769 if (ops->vidioc_g_fmt_vbi_cap)
770 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
35ea11ff
HV		 771 break;
772 case V4L2_BUF_TYPE_VBI_OUTPUT:
a399810c
HV		 773 if (ops->vidioc_g_fmt_vbi_out)
774 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
35ea11ff
HV		 775 break;
776 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
a399810c
HV		 777 if (ops->vidioc_g_fmt_sliced_vbi_cap)
778 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
35ea11ff
HV		 779 fh, f);
780 break;
781 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
a399810c
HV		 782 if (ops->vidioc_g_fmt_sliced_vbi_out)
783 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
35ea11ff
HV		 784 fh, f);
785 break;
786 case V4L2_BUF_TYPE_PRIVATE:
a399810c
HV		 787 if (ops->vidioc_g_fmt_type_private)
788 ret = ops->vidioc_g_fmt_type_private(file,
35ea11ff
HV		 789 fh, f);
790 break;
791 }
792
793 break;
794 }
795 case VIDIOC_S_FMT:
796 {
797 struct v4l2_format *f = (struct v4l2_format *)arg;
798
799 /* FIXME: Should be one dump per type */
800 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
801
802 switch (f->type) {
803 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
7ecc0cf9 804 CLEAR_AFTER_FIELD(f, fmt.pix);
35ea11ff 805 v4l_print_pix_fmt(vfd, &f->fmt.pix);
a399810c
HV		 806 if (ops->vidioc_s_fmt_vid_cap)
807 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
35ea11ff
HV		 808 break;
809 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
7ecc0cf9 810 CLEAR_AFTER_FIELD(f, fmt.win);
a399810c
HV		 811 if (ops->vidioc_s_fmt_vid_overlay)
812 ret = ops->vidioc_s_fmt_vid_overlay(file,
35ea11ff
HV		 813 fh, f);
814 break;
815 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
7ecc0cf9 816 CLEAR_AFTER_FIELD(f, fmt.pix);
35ea11ff 817 v4l_print_pix_fmt(vfd, &f->fmt.pix);
a399810c
HV		 818 if (ops->vidioc_s_fmt_vid_out)
819 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
35ea11ff
HV		 820 break;
821 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
7ecc0cf9 822 CLEAR_AFTER_FIELD(f, fmt.win);
a399810c
HV		 823 if (ops->vidioc_s_fmt_vid_out_overlay)
824 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
35ea11ff
HV		 825 fh, f);
826 break;
827 case V4L2_BUF_TYPE_VBI_CAPTURE:
7ecc0cf9 828 CLEAR_AFTER_FIELD(f, fmt.vbi);
a399810c
HV		 829 if (ops->vidioc_s_fmt_vbi_cap)
830 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
35ea11ff
HV		 831 break;
832 case V4L2_BUF_TYPE_VBI_OUTPUT:
7ecc0cf9 833 CLEAR_AFTER_FIELD(f, fmt.vbi);
a399810c
HV		 834 if (ops->vidioc_s_fmt_vbi_out)
835 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
35ea11ff
HV		 836 break;
837 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
7ecc0cf9 838 CLEAR_AFTER_FIELD(f, fmt.sliced);
a399810c
HV		 839 if (ops->vidioc_s_fmt_sliced_vbi_cap)
840 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
35ea11ff
HV		 841 fh, f);
842 break;
843 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
7ecc0cf9 844 CLEAR_AFTER_FIELD(f, fmt.sliced);
a399810c
HV		 845 if (ops->vidioc_s_fmt_sliced_vbi_out)
846 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
35ea11ff
HV		 847 fh, f);
848 break;
849 case V4L2_BUF_TYPE_PRIVATE:
7ecc0cf9 850 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
a399810c
HV		 851 if (ops->vidioc_s_fmt_type_private)
852 ret = ops->vidioc_s_fmt_type_private(file,
35ea11ff
HV		 853 fh, f);
854 break;
855 }
856 break;
857 }
858 case VIDIOC_TRY_FMT:
859 {
860 struct v4l2_format *f = (struct v4l2_format *)arg;
861
862 /* FIXME: Should be one dump per type */
863 dbgarg(cmd, "type=%s\n", prt_names(f->type,
864 v4l2_type_names));
865 switch (f->type) {
866 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
7ecc0cf9 867 CLEAR_AFTER_FIELD(f, fmt.pix);
a399810c
HV		 868 if (ops->vidioc_try_fmt_vid_cap)
869 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
35ea11ff
HV		 870 if (!ret)
871 v4l_print_pix_fmt(vfd, &f->fmt.pix);
872 break;
873 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
7ecc0cf9 874 CLEAR_AFTER_FIELD(f, fmt.win);
a399810c
HV		 875 if (ops->vidioc_try_fmt_vid_overlay)
876 ret = ops->vidioc_try_fmt_vid_overlay(file,
35ea11ff
HV		 877 fh, f);
878 break;
879 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
7ecc0cf9 880 CLEAR_AFTER_FIELD(f, fmt.pix);
a399810c
HV		 881 if (ops->vidioc_try_fmt_vid_out)
882 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
35ea11ff
HV		 883 if (!ret)
884 v4l_print_pix_fmt(vfd, &f->fmt.pix);
885 break;
886 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
7ecc0cf9 887 CLEAR_AFTER_FIELD(f, fmt.win);
a399810c
HV		 888 if (ops->vidioc_try_fmt_vid_out_overlay)
889 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
35ea11ff
HV		 890 fh, f);
891 break;
892 case V4L2_BUF_TYPE_VBI_CAPTURE:
7ecc0cf9 893 CLEAR_AFTER_FIELD(f, fmt.vbi);
a399810c
HV		 894 if (ops->vidioc_try_fmt_vbi_cap)
895 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
35ea11ff
HV		 896 break;
897 case V4L2_BUF_TYPE_VBI_OUTPUT:
7ecc0cf9 898 CLEAR_AFTER_FIELD(f, fmt.vbi);
a399810c
HV		 899 if (ops->vidioc_try_fmt_vbi_out)
900 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
35ea11ff
HV		 901 break;
902 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
7ecc0cf9 903 CLEAR_AFTER_FIELD(f, fmt.sliced);
a399810c
HV		 904 if (ops->vidioc_try_fmt_sliced_vbi_cap)
905 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
35ea11ff
HV		 906 fh, f);
907 break;
908 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
7ecc0cf9 909 CLEAR_AFTER_FIELD(f, fmt.sliced);
a399810c
HV		 910 if (ops->vidioc_try_fmt_sliced_vbi_out)
911 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
35ea11ff
HV		 912 fh, f);
913 break;
914 case V4L2_BUF_TYPE_PRIVATE:
7ecc0cf9 915 /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
a399810c
HV		 916 if (ops->vidioc_try_fmt_type_private)
917 ret = ops->vidioc_try_fmt_type_private(file,
35ea11ff
HV		 918 fh, f);
919 break;
920 }
921
922 break;
923 }
924 /* FIXME: Those buf reqs could be handled here,
925 with some changes on videobuf to allow its header to be included at
926 videodev2.h or being merged at videodev2.
927 */
928 case VIDIOC_REQBUFS:
929 {
930 struct v4l2_requestbuffers *p = arg;
931
a399810c 932 if (!ops->vidioc_reqbufs)
35ea11ff 933 break;
a399810c 934 ret = check_fmt(ops, p->type);
35ea11ff
HV		 935 if (ret)
936 break;
937
7ecc0cf9
TP		 938 if (p->type < V4L2_BUF_TYPE_PRIVATE)
939 CLEAR_AFTER_FIELD(p, memory);
940
a399810c 941 ret = ops->vidioc_reqbufs(file, fh, p);
35ea11ff
HV		 942 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
943 p->count,
944 prt_names(p->type, v4l2_type_names),
945 prt_names(p->memory, v4l2_memory_names));
946 break;
947 }
948 case VIDIOC_QUERYBUF:
949 {
950 struct v4l2_buffer *p = arg;
951
a399810c 952 if (!ops->vidioc_querybuf)
35ea11ff 953 break;
a399810c 954 ret = check_fmt(ops, p->type);
35ea11ff
HV		 955 if (ret)
956 break;
957
a399810c 958 ret = ops->vidioc_querybuf(file, fh, p);
35ea11ff
HV		 959 if (!ret)
960 dbgbuf(cmd, vfd, p);
961 break;
962 }
963 case VIDIOC_QBUF:
964 {
965 struct v4l2_buffer *p = arg;
966
a399810c 967 if (!ops->vidioc_qbuf)
35ea11ff 968 break;
a399810c 969 ret = check_fmt(ops, p->type);
35ea11ff
HV		 970 if (ret)
971 break;
972
a399810c 973 ret = ops->vidioc_qbuf(file, fh, p);
35ea11ff
HV		 974 if (!ret)
975 dbgbuf(cmd, vfd, p);
976 break;
977 }
978 case VIDIOC_DQBUF:
979 {
980 struct v4l2_buffer *p = arg;
981
a399810c 982 if (!ops->vidioc_dqbuf)
35ea11ff 983 break;
a399810c 984 ret = check_fmt(ops, p->type);
35ea11ff
HV		 985 if (ret)
986 break;
987
a399810c 988 ret = ops->vidioc_dqbuf(file, fh, p);
35ea11ff
HV		 989 if (!ret)
990 dbgbuf(cmd, vfd, p);
991 break;
992 }
993 case VIDIOC_OVERLAY:
994 {
995 int *i = arg;
996
a399810c 997 if (!ops->vidioc_overlay)
35ea11ff
HV		 998 break;
999 dbgarg(cmd, "value=%d\n", *i);
a399810c 1000 ret = ops->vidioc_overlay(file, fh, *i);
35ea11ff
HV		 1001 break;
1002 }
1003 case VIDIOC_G_FBUF:
1004 {
1005 struct v4l2_framebuffer *p = arg;
1006
a399810c 1007 if (!ops->vidioc_g_fbuf)
35ea11ff 1008 break;
a399810c 1009 ret = ops->vidioc_g_fbuf(file, fh, arg);
35ea11ff
HV		 1010 if (!ret) {
1011 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1012 p->capability, p->flags,
1013 (unsigned long)p->base);
1014 v4l_print_pix_fmt(vfd, &p->fmt);
1015 }
1016 break;
1017 }
1018 case VIDIOC_S_FBUF:
1019 {
1020 struct v4l2_framebuffer *p = arg;
1021
a399810c 1022 if (!ops->vidioc_s_fbuf)
35ea11ff
HV		 1023 break;
1024 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1025 p->capability, p->flags, (unsigned long)p->base);
1026 v4l_print_pix_fmt(vfd, &p->fmt);
a399810c 1027 ret = ops->vidioc_s_fbuf(file, fh, arg);
35ea11ff
HV		 1028 break;
1029 }
1030 case VIDIOC_STREAMON:
1031 {
1032 enum v4l2_buf_type i = *(int *)arg;
1033
a399810c 1034 if (!ops->vidioc_streamon)
35ea11ff
HV		 1035 break;
1036 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
a399810c 1037 ret = ops->vidioc_streamon(file, fh, i);
35ea11ff
HV		 1038 break;
1039 }
1040 case VIDIOC_STREAMOFF:
1041 {
1042 enum v4l2_buf_type i = *(int *)arg;
1043
a399810c 1044 if (!ops->vidioc_streamoff)
35ea11ff
HV		 1045 break;
1046 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
a399810c 1047 ret = ops->vidioc_streamoff(file, fh, i);
35ea11ff
HV		 1048 break;
1049 }
1050 /* ---------- tv norms ---------- */
1051 case VIDIOC_ENUMSTD:
1052 {
1053 struct v4l2_standard *p = arg;
1054 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1055 unsigned int index = p->index, i, j = 0;
1056 const char *descr = "";
1057
1058 /* Return norm array in a canonical way */
1059 for (i = 0; i <= index && id; i++) {
1060 /* last std value in the standards array is 0, so this
1061 while always ends there since (id & 0) == 0. */
1062 while ((id & standards[j].std) != standards[j].std)
1063 j++;
1064 curr_id = standards[j].std;
1065 descr = standards[j].descr;
1066 j++;
1067 if (curr_id == 0)
1068 break;
1069 if (curr_id != V4L2_STD_PAL &&
1070 curr_id != V4L2_STD_SECAM &&
1071 curr_id != V4L2_STD_NTSC)
1072 id &= ~curr_id;
1073 }
1074 if (i <= index)
1075 return -EINVAL;
1076
1077 v4l2_video_std_construct(p, curr_id, descr);
35ea11ff
HV		 1078
1079 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1080 "framelines=%d\n", p->index,
1081 (unsigned long long)p->id, p->name,
1082 p->frameperiod.numerator,
1083 p->frameperiod.denominator,
1084 p->framelines);
1085
1086 ret = 0;
1087 break;
1088 }
1089 case VIDIOC_G_STD:
1090 {
1091 v4l2_std_id *id = arg;
1092
1093 ret = 0;
1094 /* Calls the specific handler */
a399810c
HV		 1095 if (ops->vidioc_g_std)
1096 ret = ops->vidioc_g_std(file, fh, id);
9bedc7f7 1097 else if (vfd->current_norm)
35ea11ff 1098 *id = vfd->current_norm;
9bedc7f7
HV		 1099 else
1100 ret = -EINVAL;
35ea11ff
HV		 1101
1102 if (!ret)
1103 dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1104 break;
1105 }
1106 case VIDIOC_S_STD:
1107 {
1108 v4l2_std_id *id = arg, norm;
1109
1110 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1111
1112 norm = (*id) & vfd->tvnorms;
1113 if (vfd->tvnorms && !norm) /* Check if std is supported */
1114 break;
1115
1116 /* Calls the specific handler */
a399810c
HV		 1117 if (ops->vidioc_s_std)
1118 ret = ops->vidioc_s_std(file, fh, &norm);
35ea11ff
HV		 1119 else
1120 ret = -EINVAL;
1121
1122 /* Updates standard information */
1123 if (ret >= 0)
1124 vfd->current_norm = norm;
1125 break;
1126 }
1127 case VIDIOC_QUERYSTD:
1128 {
1129 v4l2_std_id *p = arg;
1130
a399810c 1131 if (!ops->vidioc_querystd)
35ea11ff 1132 break;
a399810c 1133 ret = ops->vidioc_querystd(file, fh, arg);
35ea11ff
HV		 1134 if (!ret)
1135 dbgarg(cmd, "detected std=%08Lx\n",
1136 (unsigned long long)*p);
1137 break;
1138 }
1139 /* ------ input switching ---------- */
1140 /* FIXME: Inputs can be handled inside videodev2 */
1141 case VIDIOC_ENUMINPUT:
1142 {
1143 struct v4l2_input *p = arg;
35ea11ff 1144
b6456c0c
MK		 1145 /*
1146 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1147 * CAP_STD here based on ioctl handler provided by the
1148 * driver. If the driver doesn't support these
1149 * for a specific input, it must override these flags.
1150 */
1151 if (ops->vidioc_s_std)
1152 p->capabilities |= V4L2_IN_CAP_STD;
1153 if (ops->vidioc_s_dv_preset)
1154 p->capabilities |= V4L2_IN_CAP_PRESETS;
1155 if (ops->vidioc_s_dv_timings)
1156 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1157
a399810c 1158 if (!ops->vidioc_enum_input)
35ea11ff 1159 break;
35ea11ff 1160
a399810c 1161 ret = ops->vidioc_enum_input(file, fh, p);
35ea11ff
HV		 1162 if (!ret)
1163 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1164 "audioset=%d, "
1165 "tuner=%d, std=%08Lx, status=%d\n",
1166 p->index, p->name, p->type, p->audioset,
1167 p->tuner,
1168 (unsigned long long)p->std,
1169 p->status);
1170 break;
1171 }
1172 case VIDIOC_G_INPUT:
1173 {
1174 unsigned int *i = arg;
1175
a399810c 1176 if (!ops->vidioc_g_input)
35ea11ff 1177 break;
a399810c 1178 ret = ops->vidioc_g_input(file, fh, i);
35ea11ff
HV		 1179 if (!ret)
1180 dbgarg(cmd, "value=%d\n", *i);
1181 break;
1182 }
1183 case VIDIOC_S_INPUT:
1184 {
1185 unsigned int *i = arg;
1186
a399810c 1187 if (!ops->vidioc_s_input)
35ea11ff
HV		 1188 break;
1189 dbgarg(cmd, "value=%d\n", *i);
a399810c 1190 ret = ops->vidioc_s_input(file, fh, *i);
35ea11ff
HV		 1191 break;
1192 }
1193
1194 /* ------ output switching ---------- */
1195 case VIDIOC_ENUMOUTPUT:
1196 {
1197 struct v4l2_output *p = arg;
35ea11ff 1198
a399810c 1199 if (!ops->vidioc_enum_output)
35ea11ff 1200 break;
35ea11ff 1201
b6456c0c
MK		 1202 /*
1203 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1204 * CAP_STD here based on ioctl handler provided by the
1205 * driver. If the driver doesn't support these
1206 * for a specific output, it must override these flags.
1207 */
1208 if (ops->vidioc_s_std)
1209 p->capabilities |= V4L2_OUT_CAP_STD;
1210 if (ops->vidioc_s_dv_preset)
1211 p->capabilities |= V4L2_OUT_CAP_PRESETS;
1212 if (ops->vidioc_s_dv_timings)
1213 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1214
a399810c 1215 ret = ops->vidioc_enum_output(file, fh, p);
35ea11ff
HV		 1216 if (!ret)
1217 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1218 "audioset=0x%x, "
1219 "modulator=%d, std=0x%08Lx\n",
1220 p->index, p->name, p->type, p->audioset,
1221 p->modulator, (unsigned long long)p->std);
1222 break;
1223 }
1224 case VIDIOC_G_OUTPUT:
1225 {
1226 unsigned int *i = arg;
1227
a399810c 1228 if (!ops->vidioc_g_output)
35ea11ff 1229 break;
a399810c 1230 ret = ops->vidioc_g_output(file, fh, i);
35ea11ff
HV		 1231 if (!ret)
1232 dbgarg(cmd, "value=%d\n", *i);
1233 break;
1234 }
1235 case VIDIOC_S_OUTPUT:
1236 {
1237 unsigned int *i = arg;
1238
a399810c 1239 if (!ops->vidioc_s_output)
35ea11ff
HV		 1240 break;
1241 dbgarg(cmd, "value=%d\n", *i);
a399810c 1242 ret = ops->vidioc_s_output(file, fh, *i);
35ea11ff
HV		 1243 break;
1244 }
1245
1246 /* --- controls ---------------------------------------------- */
1247 case VIDIOC_QUERYCTRL:
1248 {
1249 struct v4l2_queryctrl *p = arg;
1250
a399810c 1251 if (!ops->vidioc_queryctrl)
35ea11ff 1252 break;
a399810c 1253 ret = ops->vidioc_queryctrl(file, fh, p);
35ea11ff
HV		 1254 if (!ret)
1255 dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1256 "step=%d, default=%d, flags=0x%08x\n",
1257 p->id, p->type, p->name,
1258 p->minimum, p->maximum,
1259 p->step, p->default_value, p->flags);
1260 else
1261 dbgarg(cmd, "id=0x%x\n", p->id);
1262 break;
1263 }
1264 case VIDIOC_G_CTRL:
1265 {
1266 struct v4l2_control *p = arg;
1267
a399810c
HV		 1268 if (ops->vidioc_g_ctrl)
1269 ret = ops->vidioc_g_ctrl(file, fh, p);
1270 else if (ops->vidioc_g_ext_ctrls) {
35ea11ff
HV		 1271 struct v4l2_ext_controls ctrls;
1272 struct v4l2_ext_control ctrl;
1273
1274 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1275 ctrls.count = 1;
1276 ctrls.controls = &ctrl;
1277 ctrl.id = p->id;
1278 ctrl.value = p->value;
1279 if (check_ext_ctrls(&ctrls, 1)) {
a399810c 1280 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
35ea11ff
HV		 1281 if (ret == 0)
1282 p->value = ctrl.value;
1283 }
1284 } else
1285 break;
1286 if (!ret)
1287 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1288 else
1289 dbgarg(cmd, "id=0x%x\n", p->id);
1290 break;
1291 }
1292 case VIDIOC_S_CTRL:
1293 {
1294 struct v4l2_control *p = arg;
1295 struct v4l2_ext_controls ctrls;
1296 struct v4l2_ext_control ctrl;
1297
a399810c 1298 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
35ea11ff
HV		 1299 break;
1300
1301 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1302
a399810c
HV		 1303 if (ops->vidioc_s_ctrl) {
1304 ret = ops->vidioc_s_ctrl(file, fh, p);
35ea11ff
HV		 1305 break;
1306 }
a399810c 1307 if (!ops->vidioc_s_ext_ctrls)
35ea11ff
HV		 1308 break;
1309
1310 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1311 ctrls.count = 1;
1312 ctrls.controls = &ctrl;
1313 ctrl.id = p->id;
1314 ctrl.value = p->value;
1315 if (check_ext_ctrls(&ctrls, 1))
a399810c 1316 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
35ea11ff
HV		 1317 break;
1318 }
1319 case VIDIOC_G_EXT_CTRLS:
1320 {
1321 struct v4l2_ext_controls *p = arg;
1322
1323 p->error_idx = p->count;
a399810c 1324 if (!ops->vidioc_g_ext_ctrls)
35ea11ff
HV		 1325 break;
1326 if (check_ext_ctrls(p, 0))
a399810c 1327 ret = ops->vidioc_g_ext_ctrls(file, fh, p);
35ea11ff
HV		 1328 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1329 break;
1330 }
1331 case VIDIOC_S_EXT_CTRLS:
1332 {
1333 struct v4l2_ext_controls *p = arg;
1334
1335 p->error_idx = p->count;
a399810c 1336 if (!ops->vidioc_s_ext_ctrls)
35ea11ff
HV		 1337 break;
1338 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1339 if (check_ext_ctrls(p, 0))
a399810c 1340 ret = ops->vidioc_s_ext_ctrls(file, fh, p);
35ea11ff
HV		 1341 break;
1342 }
1343 case VIDIOC_TRY_EXT_CTRLS:
1344 {
1345 struct v4l2_ext_controls *p = arg;
1346
1347 p->error_idx = p->count;
a399810c 1348 if (!ops->vidioc_try_ext_ctrls)
35ea11ff
HV		 1349 break;
1350 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1351 if (check_ext_ctrls(p, 0))
a399810c 1352 ret = ops->vidioc_try_ext_ctrls(file, fh, p);
35ea11ff
HV		 1353 break;
1354 }
1355 case VIDIOC_QUERYMENU:
1356 {
1357 struct v4l2_querymenu *p = arg;
1358
a399810c 1359 if (!ops->vidioc_querymenu)
35ea11ff 1360 break;
a399810c 1361 ret = ops->vidioc_querymenu(file, fh, p);
35ea11ff
HV		 1362 if (!ret)
1363 dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1364 p->id, p->index, p->name);
1365 else
1366 dbgarg(cmd, "id=0x%x, index=%d\n",
1367 p->id, p->index);
1368 break;
1369 }
1370 /* --- audio ---------------------------------------------- */
1371 case VIDIOC_ENUMAUDIO:
1372 {
1373 struct v4l2_audio *p = arg;
1374
a399810c 1375 if (!ops->vidioc_enumaudio)
35ea11ff 1376 break;
a399810c 1377 ret = ops->vidioc_enumaudio(file, fh, p);
35ea11ff
HV		 1378 if (!ret)
1379 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1380 "mode=0x%x\n", p->index, p->name,
1381 p->capability, p->mode);
1382 else
1383 dbgarg(cmd, "index=%d\n", p->index);
1384 break;
1385 }
1386 case VIDIOC_G_AUDIO:
1387 {
1388 struct v4l2_audio *p = arg;
35ea11ff 1389
a399810c 1390 if (!ops->vidioc_g_audio)
35ea11ff
HV		 1391 break;
1392
a399810c 1393 ret = ops->vidioc_g_audio(file, fh, p);
35ea11ff
HV		 1394 if (!ret)
1395 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1396 "mode=0x%x\n", p->index,
1397 p->name, p->capability, p->mode);
1398 else
1399 dbgarg(cmd, "index=%d\n", p->index);
1400 break;
1401 }
1402 case VIDIOC_S_AUDIO:
1403 {
1404 struct v4l2_audio *p = arg;
1405
a399810c 1406 if (!ops->vidioc_s_audio)
35ea11ff
HV		 1407 break;
1408 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1409 "mode=0x%x\n", p->index, p->name,
1410 p->capability, p->mode);
a399810c 1411 ret = ops->vidioc_s_audio(file, fh, p);
35ea11ff
HV		 1412 break;
1413 }
1414 case VIDIOC_ENUMAUDOUT:
1415 {
1416 struct v4l2_audioout *p = arg;
1417
a399810c 1418 if (!ops->vidioc_enumaudout)
35ea11ff
HV		 1419 break;
1420 dbgarg(cmd, "Enum for index=%d\n", p->index);
a399810c 1421 ret = ops->vidioc_enumaudout(file, fh, p);
35ea11ff
HV		 1422 if (!ret)
1423 dbgarg2("index=%d, name=%s, capability=%d, "
1424 "mode=%d\n", p->index, p->name,
1425 p->capability, p->mode);
1426 break;
1427 }
1428 case VIDIOC_G_AUDOUT:
1429 {
1430 struct v4l2_audioout *p = arg;
1431
a399810c 1432 if (!ops->vidioc_g_audout)
35ea11ff 1433 break;
337f9d20 1434
a399810c 1435 ret = ops->vidioc_g_audout(file, fh, p);
35ea11ff
HV		 1436 if (!ret)
1437 dbgarg2("index=%d, name=%s, capability=%d, "
1438 "mode=%d\n", p->index, p->name,
1439 p->capability, p->mode);
1440 break;
1441 }
1442 case VIDIOC_S_AUDOUT:
1443 {
1444 struct v4l2_audioout *p = arg;
1445
a399810c 1446 if (!ops->vidioc_s_audout)
35ea11ff
HV		 1447 break;
1448 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1449 "mode=%d\n", p->index, p->name,
1450 p->capability, p->mode);
1451
a399810c 1452 ret = ops->vidioc_s_audout(file, fh, p);
35ea11ff
HV		 1453 break;
1454 }
1455 case VIDIOC_G_MODULATOR:
1456 {
1457 struct v4l2_modulator *p = arg;
1458
a399810c 1459 if (!ops->vidioc_g_modulator)
35ea11ff 1460 break;
a399810c 1461 ret = ops->vidioc_g_modulator(file, fh, p);
35ea11ff
HV		 1462 if (!ret)
1463 dbgarg(cmd, "index=%d, name=%s, "
1464 "capability=%d, rangelow=%d,"
1465 " rangehigh=%d, txsubchans=%d\n",
1466 p->index, p->name, p->capability,
1467 p->rangelow, p->rangehigh,
1468 p->txsubchans);
1469 break;
1470 }
1471 case VIDIOC_S_MODULATOR:
1472 {
1473 struct v4l2_modulator *p = arg;
1474
a399810c 1475 if (!ops->vidioc_s_modulator)
35ea11ff
HV		 1476 break;
1477 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1478 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1479 p->index, p->name, p->capability, p->rangelow,
1480 p->rangehigh, p->txsubchans);
a399810c 1481 ret = ops->vidioc_s_modulator(file, fh, p);
35ea11ff
HV		 1482 break;
1483 }
1484 case VIDIOC_G_CROP:
1485 {
1486 struct v4l2_crop *p = arg;
1487
a399810c 1488 if (!ops->vidioc_g_crop)
35ea11ff 1489 break;
a56a18c3 1490
35ea11ff 1491 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
a399810c 1492 ret = ops->vidioc_g_crop(file, fh, p);
35ea11ff
HV		 1493 if (!ret)
1494 dbgrect(vfd, "", &p->c);
1495 break;
1496 }
1497 case VIDIOC_S_CROP:
1498 {
1499 struct v4l2_crop *p = arg;
1500
a399810c 1501 if (!ops->vidioc_s_crop)
35ea11ff
HV		 1502 break;
1503 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1504 dbgrect(vfd, "", &p->c);
a399810c 1505 ret = ops->vidioc_s_crop(file, fh, p);
35ea11ff
HV		 1506 break;
1507 }
1508 case VIDIOC_CROPCAP:
1509 {
1510 struct v4l2_cropcap *p = arg;
1511
1512 /*FIXME: Should also show v4l2_fract pixelaspect */
a399810c 1513 if (!ops->vidioc_cropcap)
35ea11ff 1514 break;
a56a18c3 1515
35ea11ff 1516 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
a399810c 1517 ret = ops->vidioc_cropcap(file, fh, p);
35ea11ff
HV		 1518 if (!ret) {
1519 dbgrect(vfd, "bounds ", &p->bounds);
1520 dbgrect(vfd, "defrect ", &p->defrect);
1521 }
1522 break;
1523 }
1524 case VIDIOC_G_JPEGCOMP:
1525 {
1526 struct v4l2_jpegcompression *p = arg;
1527
a399810c 1528 if (!ops->vidioc_g_jpegcomp)
35ea11ff 1529 break;
a56a18c3 1530
a399810c 1531 ret = ops->vidioc_g_jpegcomp(file, fh, p);
35ea11ff
HV		 1532 if (!ret)
1533 dbgarg(cmd, "quality=%d, APPn=%d, "
1534 "APP_len=%d, COM_len=%d, "
1535 "jpeg_markers=%d\n",
1536 p->quality, p->APPn, p->APP_len,
1537 p->COM_len, p->jpeg_markers);
1538 break;
1539 }
1540 case VIDIOC_S_JPEGCOMP:
1541 {
1542 struct v4l2_jpegcompression *p = arg;
1543
a399810c 1544 if (!ops->vidioc_g_jpegcomp)
35ea11ff
HV		 1545 break;
1546 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1547 "COM_len=%d, jpeg_markers=%d\n",
1548 p->quality, p->APPn, p->APP_len,
1549 p->COM_len, p->jpeg_markers);
a399810c 1550 ret = ops->vidioc_s_jpegcomp(file, fh, p);
35ea11ff
HV		 1551 break;
1552 }
1553 case VIDIOC_G_ENC_INDEX:
1554 {
1555 struct v4l2_enc_idx *p = arg;
1556
a399810c 1557 if (!ops->vidioc_g_enc_index)
35ea11ff 1558 break;
a399810c 1559 ret = ops->vidioc_g_enc_index(file, fh, p);
35ea11ff
HV		 1560 if (!ret)
1561 dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1562 p->entries, p->entries_cap);
1563 break;
1564 }
1565 case VIDIOC_ENCODER_CMD:
1566 {
1567 struct v4l2_encoder_cmd *p = arg;
1568
a399810c 1569 if (!ops->vidioc_encoder_cmd)
35ea11ff 1570 break;
a399810c 1571 ret = ops->vidioc_encoder_cmd(file, fh, p);
35ea11ff
HV		 1572 if (!ret)
1573 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1574 break;
1575 }
1576 case VIDIOC_TRY_ENCODER_CMD:
1577 {
1578 struct v4l2_encoder_cmd *p = arg;
1579
a399810c 1580 if (!ops->vidioc_try_encoder_cmd)
35ea11ff 1581 break;
a399810c 1582 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
35ea11ff
HV		 1583 if (!ret)
1584 dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1585 break;
1586 }
1587 case VIDIOC_G_PARM:
1588 {
1589 struct v4l2_streamparm *p = arg;
35ea11ff 1590
a399810c 1591 if (ops->vidioc_g_parm) {
34796bc0
TP		 1592 ret = check_fmt(ops, p->type);
1593 if (ret)
1594 break;
a399810c 1595 ret = ops->vidioc_g_parm(file, fh, p);
35ea11ff 1596 } else {
9bedc7f7
HV		 1597 v4l2_std_id std = vfd->current_norm;
1598
35ea11ff
HV		 1599 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1600 return -EINVAL;
1601
35ea11ff 1602 ret = 0;
9bedc7f7
HV		 1603 if (ops->vidioc_g_std)
1604 ret = ops->vidioc_g_std(file, fh, &std);
1605 else if (std == 0)
1606 ret = -EINVAL;
1607 if (ret == 0)
1608 v4l2_video_std_frame_period(std,
1609 &p->parm.capture.timeperframe);
35ea11ff
HV		 1610 }
1611
1612 dbgarg(cmd, "type=%d\n", p->type);
1613 break;
1614 }
1615 case VIDIOC_S_PARM:
1616 {
1617 struct v4l2_streamparm *p = arg;
1618
a399810c 1619 if (!ops->vidioc_s_parm)
35ea11ff 1620 break;
34796bc0
TP		 1621 ret = check_fmt(ops, p->type);
1622 if (ret)
1623 break;
1624
35ea11ff 1625 dbgarg(cmd, "type=%d\n", p->type);
a399810c 1626 ret = ops->vidioc_s_parm(file, fh, p);
35ea11ff
HV		 1627 break;
1628 }
1629 case VIDIOC_G_TUNER:
1630 {
1631 struct v4l2_tuner *p = arg;
35ea11ff 1632
a399810c 1633 if (!ops->vidioc_g_tuner)
35ea11ff
HV		 1634 break;
1635
a399810c 1636 ret = ops->vidioc_g_tuner(file, fh, p);
35ea11ff
HV		 1637 if (!ret)
1638 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1639 "capability=0x%x, rangelow=%d, "
1640 "rangehigh=%d, signal=%d, afc=%d, "
1641 "rxsubchans=0x%x, audmode=%d\n",
1642 p->index, p->name, p->type,
1643 p->capability, p->rangelow,
1644 p->rangehigh, p->signal, p->afc,
1645 p->rxsubchans, p->audmode);
1646 break;
1647 }
1648 case VIDIOC_S_TUNER:
1649 {
1650 struct v4l2_tuner *p = arg;
1651
a399810c 1652 if (!ops->vidioc_s_tuner)
35ea11ff
HV		 1653 break;
1654 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1655 "capability=0x%x, rangelow=%d, "
1656 "rangehigh=%d, signal=%d, afc=%d, "
1657 "rxsubchans=0x%x, audmode=%d\n",
1658 p->index, p->name, p->type,
1659 p->capability, p->rangelow,
1660 p->rangehigh, p->signal, p->afc,
1661 p->rxsubchans, p->audmode);
a399810c 1662 ret = ops->vidioc_s_tuner(file, fh, p);
35ea11ff
HV		 1663 break;
1664 }
1665 case VIDIOC_G_FREQUENCY:
1666 {
1667 struct v4l2_frequency *p = arg;
1668
a399810c 1669 if (!ops->vidioc_g_frequency)
35ea11ff
HV		 1670 break;
1671
a399810c 1672 ret = ops->vidioc_g_frequency(file, fh, p);
35ea11ff
HV		 1673 if (!ret)
1674 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1675 p->tuner, p->type, p->frequency);
1676 break;
1677 }
1678 case VIDIOC_S_FREQUENCY:
1679 {
1680 struct v4l2_frequency *p = arg;
1681
a399810c 1682 if (!ops->vidioc_s_frequency)
35ea11ff
HV		 1683 break;
1684 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1685 p->tuner, p->type, p->frequency);
a399810c 1686 ret = ops->vidioc_s_frequency(file, fh, p);
35ea11ff
HV		 1687 break;
1688 }
1689 case VIDIOC_G_SLICED_VBI_CAP:
1690 {
1691 struct v4l2_sliced_vbi_cap *p = arg;
35ea11ff 1692
a399810c 1693 if (!ops->vidioc_g_sliced_vbi_cap)
35ea11ff 1694 break;
19c96e4b
TP		 1695
1696 /* Clear up to type, everything after type is zerod already */
1697 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1698
35ea11ff 1699 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
a399810c 1700 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
35ea11ff
HV		 1701 if (!ret)
1702 dbgarg2("service_set=%d\n", p->service_set);
1703 break;
1704 }
1705 case VIDIOC_LOG_STATUS:
1706 {
a399810c 1707 if (!ops->vidioc_log_status)
35ea11ff 1708 break;
a399810c 1709 ret = ops->vidioc_log_status(file, fh);
35ea11ff
HV		 1710 break;
1711 }
1712#ifdef CONFIG_VIDEO_ADV_DEBUG
1713 case VIDIOC_DBG_G_REGISTER:
1714 {
aecde8b5 1715 struct v4l2_dbg_register *p = arg;
35ea11ff
HV		 1716
1717 if (!capable(CAP_SYS_ADMIN))
1718 ret = -EPERM;
a399810c
HV		 1719 else if (ops->vidioc_g_register)
1720 ret = ops->vidioc_g_register(file, fh, p);
35ea11ff
HV		 1721 break;
1722 }
1723 case VIDIOC_DBG_S_REGISTER:
1724 {
aecde8b5 1725 struct v4l2_dbg_register *p = arg;
35ea11ff
HV		 1726
1727 if (!capable(CAP_SYS_ADMIN))
1728 ret = -EPERM;
a399810c
HV		 1729 else if (ops->vidioc_s_register)
1730 ret = ops->vidioc_s_register(file, fh, p);
35ea11ff
HV		 1731 break;
1732 }
1733#endif
aecde8b5 1734 case VIDIOC_DBG_G_CHIP_IDENT:
35ea11ff 1735 {
aecde8b5 1736 struct v4l2_dbg_chip_ident *p = arg;
35ea11ff 1737
a399810c 1738 if (!ops->vidioc_g_chip_ident)
35ea11ff 1739 break;
80b36e0f
HV		 1740 p->ident = V4L2_IDENT_NONE;
1741 p->revision = 0;
a399810c 1742 ret = ops->vidioc_g_chip_ident(file, fh, p);
35ea11ff
HV		 1743 if (!ret)
1744 dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1745 break;
1746 }
35ea11ff
HV		 1747 case VIDIOC_S_HW_FREQ_SEEK:
1748 {
1749 struct v4l2_hw_freq_seek *p = arg;
1750
a399810c 1751 if (!ops->vidioc_s_hw_freq_seek)
35ea11ff
HV		 1752 break;
1753 dbgarg(cmd,
1754 "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1755 p->tuner, p->type, p->seek_upward, p->wrap_around);
a399810c
HV		 1756 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1757 break;
1758 }
74d83fa0
MCC		 1759 case VIDIOC_ENUM_FRAMESIZES:
1760 {
1761 struct v4l2_frmsizeenum *p = arg;
1762
1763 if (!ops->vidioc_enum_framesizes)
1764 break;
1765
74d83fa0
MCC		 1766 ret = ops->vidioc_enum_framesizes(file, fh, p);
1767 dbgarg(cmd,
d1afe425
MCC		 1768 "index=%d, pixelformat=%c%c%c%c, type=%d ",
1769 p->index,
1770 (p->pixel_format & 0xff),
1771 (p->pixel_format >> 8) & 0xff,
1772 (p->pixel_format >> 16) & 0xff,
1773 (p->pixel_format >> 24) & 0xff,
1774 p->type);
74d83fa0
MCC		 1775 switch (p->type) {
1776 case V4L2_FRMSIZE_TYPE_DISCRETE:
d33fbcbb 1777 dbgarg3("width = %d, height=%d\n",
74d83fa0
MCC		 1778 p->discrete.width, p->discrete.height);
1779 break;
1780 case V4L2_FRMSIZE_TYPE_STEPWISE:
d33fbcbb 1781 dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
74d83fa0
MCC		 1782 p->stepwise.min_width, p->stepwise.min_height,
1783 p->stepwise.step_width, p->stepwise.step_height,
1784 p->stepwise.max_width, p->stepwise.max_height);
1785 break;
1786 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
d33fbcbb 1787 dbgarg3("continuous\n");
74d83fa0
MCC		 1788 break;
1789 default:
d33fbcbb 1790 dbgarg3("- Unknown type!\n");
74d83fa0
MCC		 1791 }
1792
1793 break;
1794 }
1795 case VIDIOC_ENUM_FRAMEINTERVALS:
1796 {
1797 struct v4l2_frmivalenum *p = arg;
1798
1799 if (!ops->vidioc_enum_frameintervals)
1800 break;
1801
74d83fa0
MCC		 1802 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1803 dbgarg(cmd,
1804 "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1805 p->index, p->pixel_format,
1806 p->width, p->height, p->type);
1807 switch (p->type) {
1808 case V4L2_FRMIVAL_TYPE_DISCRETE:
1809 dbgarg2("fps=%d/%d\n",
1810 p->discrete.numerator,
1811 p->discrete.denominator);
1812 break;
1813 case V4L2_FRMIVAL_TYPE_STEPWISE:
1958578d
MCC		 1814 dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1815 p->stepwise.min.numerator,
1816 p->stepwise.min.denominator,
1817 p->stepwise.max.numerator,
1818 p->stepwise.max.denominator,
1819 p->stepwise.step.numerator,
1820 p->stepwise.step.denominator);
74d83fa0
MCC		 1821 break;
1822 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1823 dbgarg2("continuous\n");
1824 break;
1825 default:
1826 dbgarg2("- Unknown type!\n");
1827 }
1828 break;
1829 }
b6456c0c
MK		 1830 case VIDIOC_ENUM_DV_PRESETS:
1831 {
1832 struct v4l2_dv_enum_preset *p = arg;
1833
1834 if (!ops->vidioc_enum_dv_presets)
1835 break;
1836
1837 ret = ops->vidioc_enum_dv_presets(file, fh, p);
1838 if (!ret)
1839 dbgarg(cmd,
1840 "index=%d, preset=%d, name=%s, width=%d,"
1841 " height=%d ",
1842 p->index, p->preset, p->name, p->width,
1843 p->height);
1844 break;
1845 }
1846 case VIDIOC_S_DV_PRESET:
1847 {
1848 struct v4l2_dv_preset *p = arg;
1849
1850 if (!ops->vidioc_s_dv_preset)
1851 break;
1852
1853 dbgarg(cmd, "preset=%d\n", p->preset);
1854 ret = ops->vidioc_s_dv_preset(file, fh, p);
1855 break;
1856 }
1857 case VIDIOC_G_DV_PRESET:
1858 {
1859 struct v4l2_dv_preset *p = arg;
1860
1861 if (!ops->vidioc_g_dv_preset)
1862 break;
1863
1864 ret = ops->vidioc_g_dv_preset(file, fh, p);
1865 if (!ret)
1866 dbgarg(cmd, "preset=%d\n", p->preset);
1867 break;
1868 }
1869 case VIDIOC_QUERY_DV_PRESET:
1870 {
1871 struct v4l2_dv_preset *p = arg;
1872
1873 if (!ops->vidioc_query_dv_preset)
1874 break;
1875
1876 ret = ops->vidioc_query_dv_preset(file, fh, p);
1877 if (!ret)
1878 dbgarg(cmd, "preset=%d\n", p->preset);
1879 break;
1880 }
1881 case VIDIOC_S_DV_TIMINGS:
1882 {
1883 struct v4l2_dv_timings *p = arg;
1884
1885 if (!ops->vidioc_s_dv_timings)
1886 break;
1887
1888 switch (p->type) {
1889 case V4L2_DV_BT_656_1120:
1890 dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
1891 " width=%d, height=%d, polarities=%x,"
1892 " hfrontporch=%d, hsync=%d, hbackporch=%d,"
1893 " vfrontporch=%d, vsync=%d, vbackporch=%d,"
1894 " il_vfrontporch=%d, il_vsync=%d,"
1895 " il_vbackporch=%d\n",
1896 p->bt.interlaced, p->bt.pixelclock,
1897 p->bt.width, p->bt.height, p->bt.polarities,
1898 p->bt.hfrontporch, p->bt.hsync,
1899 p->bt.hbackporch, p->bt.vfrontporch,
1900 p->bt.vsync, p->bt.vbackporch,
1901 p->bt.il_vfrontporch, p->bt.il_vsync,
1902 p->bt.il_vbackporch);
1903 ret = ops->vidioc_s_dv_timings(file, fh, p);
1904 break;
1905 default:
1906 dbgarg2("Unknown type %d!\n", p->type);
1907 break;
1908 }
1909 break;
1910 }
1911 case VIDIOC_G_DV_TIMINGS:
1912 {
1913 struct v4l2_dv_timings *p = arg;
1914
1915 if (!ops->vidioc_g_dv_timings)
1916 break;
1917
1918 ret = ops->vidioc_g_dv_timings(file, fh, p);
1919 if (!ret) {
1920 switch (p->type) {
1921 case V4L2_DV_BT_656_1120:
1922 dbgarg2("bt-656/1120:interlaced=%d,"
1923 " pixelclock=%lld,"
1924 " width=%d, height=%d, polarities=%x,"
1925 " hfrontporch=%d, hsync=%d,"
1926 " hbackporch=%d, vfrontporch=%d,"
1927 " vsync=%d, vbackporch=%d,"
1928 " il_vfrontporch=%d, il_vsync=%d,"
1929 " il_vbackporch=%d\n",
1930 p->bt.interlaced, p->bt.pixelclock,
1931 p->bt.width, p->bt.height,
1932 p->bt.polarities, p->bt.hfrontporch,
1933 p->bt.hsync, p->bt.hbackporch,
1934 p->bt.vfrontporch, p->bt.vsync,
1935 p->bt.vbackporch, p->bt.il_vfrontporch,
1936 p->bt.il_vsync, p->bt.il_vbackporch);
1937 break;
1938 default:
1939 dbgarg2("Unknown type %d!\n", p->type);
1940 break;
1941 }
1942 }
1943 break;
1944 }
74d83fa0 1945
a399810c
HV		 1946 default:
1947 {
1948 if (!ops->vidioc_default)
1949 break;
1950 ret = ops->vidioc_default(file, fh, cmd, arg);
35ea11ff
HV		 1951 break;
1952 }
1953 } /* switch */
1954
1955 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1956 if (ret < 0) {
1957 v4l_print_ioctl(vfd->name, cmd);
069b7479 1958 printk(KERN_CONT " error %ld\n", ret);
35ea11ff
HV		 1959 }
1960 }
1961
1962 return ret;
1963}
1964
19c96e4b
TP		 1965/* In some cases, only a few fields are used as input, i.e. when the app sets
1966 * "index" and then the driver fills in the rest of the structure for the thing
1967 * with that index. We only need to copy up the first non-input field. */
1968static unsigned long cmd_input_size(unsigned int cmd)
1969{
1970 /* Size of structure up to and including 'field' */
9f1a693f
HV		 1971#define CMDINSIZE(cmd, type, field) \
1972 case VIDIOC_##cmd: \
1973 return offsetof(struct v4l2_##type, field) + \
1974 sizeof(((struct v4l2_##type *)0)->field);
19c96e4b 1975
9f1a693f 1976 switch (cmd) {
19c96e4b
TP		 1977 CMDINSIZE(ENUM_FMT, fmtdesc, type);
1978 CMDINSIZE(G_FMT, format, type);
1979 CMDINSIZE(QUERYBUF, buffer, type);
1980 CMDINSIZE(G_PARM, streamparm, type);
1981 CMDINSIZE(ENUMSTD, standard, index);
1982 CMDINSIZE(ENUMINPUT, input, index);
1983 CMDINSIZE(G_CTRL, control, id);
1984 CMDINSIZE(G_TUNER, tuner, index);
1985 CMDINSIZE(QUERYCTRL, queryctrl, id);
1986 CMDINSIZE(QUERYMENU, querymenu, index);
1987 CMDINSIZE(ENUMOUTPUT, output, index);
1988 CMDINSIZE(G_MODULATOR, modulator, index);
1989 CMDINSIZE(G_FREQUENCY, frequency, tuner);
1990 CMDINSIZE(CROPCAP, cropcap, type);
1991 CMDINSIZE(G_CROP, crop, type);
1992 CMDINSIZE(ENUMAUDIO, audio, index);
1993 CMDINSIZE(ENUMAUDOUT, audioout, index);
1994 CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
1995 CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
1996 CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
1997 CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
1998 CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
1999 default:
2000 return _IOC_SIZE(cmd);
2001 }
2002}
2003
069b7479 2004long video_ioctl2(struct file *file,
35ea11ff
HV		 2005 unsigned int cmd, unsigned long arg)
2006{
2007 char sbuf[128];
2008 void *mbuf = NULL;
2009 void *parg = NULL;
069b7479 2010 long err = -EINVAL;
35ea11ff
HV		 2011 int is_ext_ctrl;
2012 size_t ctrls_size = 0;
2013 void __user *user_ptr = NULL;
2014
2015#ifdef __OLD_VIDIOC_
2016 cmd = video_fix_command(cmd);
2017#endif
2018 is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
2019 cmd == VIDIOC_TRY_EXT_CTRLS);
2020
2021 /* Copy arguments into temp kernel buffer */
337f9d20 2022 if (_IOC_DIR(cmd) != _IOC_NONE) {
35ea11ff
HV		 2023 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2024 parg = sbuf;
2025 } else {
2026 /* too big to allocate from stack */
2027 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2028 if (NULL == mbuf)
2029 return -ENOMEM;
2030 parg = mbuf;
2031 }
2032
2033 err = -EFAULT;
19c96e4b
TP		 2034 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2035 unsigned long n = cmd_input_size(cmd);
2036
2037 if (copy_from_user(parg, (void __user *)arg, n))
35ea11ff 2038 goto out;
19c96e4b
TP		 2039
2040 /* zero out anything we don't copy from userspace */
2041 if (n < _IOC_SIZE(cmd))
2042 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
337f9d20
TP		 2043 } else {
2044 /* read-only ioctl */
2045 memset(parg, 0, _IOC_SIZE(cmd));
19c96e4b 2046 }
35ea11ff
HV		 2047 }
2048
2049 if (is_ext_ctrl) {
2050 struct v4l2_ext_controls *p = parg;
2051
2052 /* In case of an error, tell the caller that it wasn't
2053 a specific control that caused it. */
2054 p->error_idx = p->count;
2055 user_ptr = (void __user *)p->controls;
2056 if (p->count) {
2057 ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
2058 /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
2059 mbuf = kmalloc(ctrls_size, GFP_KERNEL);
2060 err = -ENOMEM;
2061 if (NULL == mbuf)
2062 goto out_ext_ctrl;
2063 err = -EFAULT;
2064 if (copy_from_user(mbuf, user_ptr, ctrls_size))
2065 goto out_ext_ctrl;
2066 p->controls = mbuf;
2067 }
2068 }
2069
2070 /* Handles IOCTL */
b1f88407 2071 err = __video_do_ioctl(file, cmd, parg);
35ea11ff
HV		 2072 if (err == -ENOIOCTLCMD)
2073 err = -EINVAL;
2074 if (is_ext_ctrl) {
2075 struct v4l2_ext_controls *p = parg;
2076
2077 p->controls = (void *)user_ptr;
2078 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
2079 err = -EFAULT;
2080 goto out_ext_ctrl;
2081 }
2082 if (err < 0)
2083 goto out;
2084
2085out_ext_ctrl:
2086 /* Copy results into user buffer */
2087 switch (_IOC_DIR(cmd)) {
2088 case _IOC_READ:
2089 case (_IOC_WRITE | _IOC_READ):
2090 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2091 err = -EFAULT;
2092 break;
2093 }
2094
2095out:
2096 kfree(mbuf);
2097 return err;
2098}
8a522c91 2099EXPORT_SYMBOL(video_ioctl2);
Linux 6.x block layer and io_uring tree(s)