Merge branch 'for-linus' of git://repo.or.cz/cris-mirror
[kernel.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
1085                         *id = vfd->current_norm;
1086
1087                 if (!ret)
1088                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1089                 break;
1090         }
1091         case VIDIOC_S_STD:
1092         {
1093                 v4l2_std_id *id = arg, norm;
1094
1095                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1096
1097                 norm = (*id) & vfd->tvnorms;
1098                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1099                         break;
1100
1101                 /* Calls the specific handler */
1102                 if (ops->vidioc_s_std)
1103                         ret = ops->vidioc_s_std(file, fh, &norm);
1104                 else
1105                         ret = -EINVAL;
1106
1107                 /* Updates standard information */
1108                 if (ret >= 0)
1109                         vfd->current_norm = norm;
1110                 break;
1111         }
1112         case VIDIOC_QUERYSTD:
1113         {
1114                 v4l2_std_id *p = arg;
1115
1116                 if (!ops->vidioc_querystd)
1117                         break;
1118                 ret = ops->vidioc_querystd(file, fh, arg);
1119                 if (!ret)
1120                         dbgarg(cmd, "detected std=%08Lx\n",
1121                                                 (unsigned long long)*p);
1122                 break;
1123         }
1124         /* ------ input switching ---------- */
1125         /* FIXME: Inputs can be handled inside videodev2 */
1126         case VIDIOC_ENUMINPUT:
1127         {
1128                 struct v4l2_input *p = arg;
1129
1130                 if (!ops->vidioc_enum_input)
1131                         break;
1132
1133                 ret = ops->vidioc_enum_input(file, fh, p);
1134                 if (!ret)
1135                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1136                                 "audioset=%d, "
1137                                 "tuner=%d, std=%08Lx, status=%d\n",
1138                                 p->index, p->name, p->type, p->audioset,
1139                                 p->tuner,
1140                                 (unsigned long long)p->std,
1141                                 p->status);
1142                 break;
1143         }
1144         case VIDIOC_G_INPUT:
1145         {
1146                 unsigned int *i = arg;
1147
1148                 if (!ops->vidioc_g_input)
1149                         break;
1150                 ret = ops->vidioc_g_input(file, fh, i);
1151                 if (!ret)
1152                         dbgarg(cmd, "value=%d\n", *i);
1153                 break;
1154         }
1155         case VIDIOC_S_INPUT:
1156         {
1157                 unsigned int *i = arg;
1158
1159                 if (!ops->vidioc_s_input)
1160                         break;
1161                 dbgarg(cmd, "value=%d\n", *i);
1162                 ret = ops->vidioc_s_input(file, fh, *i);
1163                 break;
1164         }
1165
1166         /* ------ output switching ---------- */
1167         case VIDIOC_ENUMOUTPUT:
1168         {
1169                 struct v4l2_output *p = arg;
1170
1171                 if (!ops->vidioc_enum_output)
1172                         break;
1173
1174                 ret = ops->vidioc_enum_output(file, fh, p);
1175                 if (!ret)
1176                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1177                                 "audioset=0x%x, "
1178                                 "modulator=%d, std=0x%08Lx\n",
1179                                 p->index, p->name, p->type, p->audioset,
1180                                 p->modulator, (unsigned long long)p->std);
1181                 break;
1182         }
1183         case VIDIOC_G_OUTPUT:
1184         {
1185                 unsigned int *i = arg;
1186
1187                 if (!ops->vidioc_g_output)
1188                         break;
1189                 ret = ops->vidioc_g_output(file, fh, i);
1190                 if (!ret)
1191                         dbgarg(cmd, "value=%d\n", *i);
1192                 break;
1193         }
1194         case VIDIOC_S_OUTPUT:
1195         {
1196                 unsigned int *i = arg;
1197
1198                 if (!ops->vidioc_s_output)
1199                         break;
1200                 dbgarg(cmd, "value=%d\n", *i);
1201                 ret = ops->vidioc_s_output(file, fh, *i);
1202                 break;
1203         }
1204
1205         /* --- controls ---------------------------------------------- */
1206         case VIDIOC_QUERYCTRL:
1207         {
1208                 struct v4l2_queryctrl *p = arg;
1209
1210                 if (!ops->vidioc_queryctrl)
1211                         break;
1212                 ret = ops->vidioc_queryctrl(file, fh, p);
1213                 if (!ret)
1214                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1215                                         "step=%d, default=%d, flags=0x%08x\n",
1216                                         p->id, p->type, p->name,
1217                                         p->minimum, p->maximum,
1218                                         p->step, p->default_value, p->flags);
1219                 else
1220                         dbgarg(cmd, "id=0x%x\n", p->id);
1221                 break;
1222         }
1223         case VIDIOC_G_CTRL:
1224         {
1225                 struct v4l2_control *p = arg;
1226
1227                 if (ops->vidioc_g_ctrl)
1228                         ret = ops->vidioc_g_ctrl(file, fh, p);
1229                 else if (ops->vidioc_g_ext_ctrls) {
1230                         struct v4l2_ext_controls ctrls;
1231                         struct v4l2_ext_control ctrl;
1232
1233                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1234                         ctrls.count = 1;
1235                         ctrls.controls = &ctrl;
1236                         ctrl.id = p->id;
1237                         ctrl.value = p->value;
1238                         if (check_ext_ctrls(&ctrls, 1)) {
1239                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1240                                 if (ret == 0)
1241                                         p->value = ctrl.value;
1242                         }
1243                 } else
1244                         break;
1245                 if (!ret)
1246                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1247                 else
1248                         dbgarg(cmd, "id=0x%x\n", p->id);
1249                 break;
1250         }
1251         case VIDIOC_S_CTRL:
1252         {
1253                 struct v4l2_control *p = arg;
1254                 struct v4l2_ext_controls ctrls;
1255                 struct v4l2_ext_control ctrl;
1256
1257                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1258                         break;
1259
1260                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1261
1262                 if (ops->vidioc_s_ctrl) {
1263                         ret = ops->vidioc_s_ctrl(file, fh, p);
1264                         break;
1265                 }
1266                 if (!ops->vidioc_s_ext_ctrls)
1267                         break;
1268
1269                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1270                 ctrls.count = 1;
1271                 ctrls.controls = &ctrl;
1272                 ctrl.id = p->id;
1273                 ctrl.value = p->value;
1274                 if (check_ext_ctrls(&ctrls, 1))
1275                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1276                 break;
1277         }
1278         case VIDIOC_G_EXT_CTRLS:
1279         {
1280                 struct v4l2_ext_controls *p = arg;
1281
1282                 p->error_idx = p->count;
1283                 if (!ops->vidioc_g_ext_ctrls)
1284                         break;
1285                 if (check_ext_ctrls(p, 0))
1286                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1287                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1288                 break;
1289         }
1290         case VIDIOC_S_EXT_CTRLS:
1291         {
1292                 struct v4l2_ext_controls *p = arg;
1293
1294                 p->error_idx = p->count;
1295                 if (!ops->vidioc_s_ext_ctrls)
1296                         break;
1297                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1298                 if (check_ext_ctrls(p, 0))
1299                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1300                 break;
1301         }
1302         case VIDIOC_TRY_EXT_CTRLS:
1303         {
1304                 struct v4l2_ext_controls *p = arg;
1305
1306                 p->error_idx = p->count;
1307                 if (!ops->vidioc_try_ext_ctrls)
1308                         break;
1309                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1310                 if (check_ext_ctrls(p, 0))
1311                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1312                 break;
1313         }
1314         case VIDIOC_QUERYMENU:
1315         {
1316                 struct v4l2_querymenu *p = arg;
1317
1318                 if (!ops->vidioc_querymenu)
1319                         break;
1320                 ret = ops->vidioc_querymenu(file, fh, p);
1321                 if (!ret)
1322                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1323                                 p->id, p->index, p->name);
1324                 else
1325                         dbgarg(cmd, "id=0x%x, index=%d\n",
1326                                 p->id, p->index);
1327                 break;
1328         }
1329         /* --- audio ---------------------------------------------- */
1330         case VIDIOC_ENUMAUDIO:
1331         {
1332                 struct v4l2_audio *p = arg;
1333
1334                 if (!ops->vidioc_enumaudio)
1335                         break;
1336                 ret = ops->vidioc_enumaudio(file, fh, p);
1337                 if (!ret)
1338                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1339                                         "mode=0x%x\n", p->index, p->name,
1340                                         p->capability, p->mode);
1341                 else
1342                         dbgarg(cmd, "index=%d\n", p->index);
1343                 break;
1344         }
1345         case VIDIOC_G_AUDIO:
1346         {
1347                 struct v4l2_audio *p = arg;
1348
1349                 if (!ops->vidioc_g_audio)
1350                         break;
1351
1352                 ret = ops->vidioc_g_audio(file, fh, p);
1353                 if (!ret)
1354                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1355                                         "mode=0x%x\n", p->index,
1356                                         p->name, p->capability, p->mode);
1357                 else
1358                         dbgarg(cmd, "index=%d\n", p->index);
1359                 break;
1360         }
1361         case VIDIOC_S_AUDIO:
1362         {
1363                 struct v4l2_audio *p = arg;
1364
1365                 if (!ops->vidioc_s_audio)
1366                         break;
1367                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1368                                         "mode=0x%x\n", p->index, p->name,
1369                                         p->capability, p->mode);
1370                 ret = ops->vidioc_s_audio(file, fh, p);
1371                 break;
1372         }
1373         case VIDIOC_ENUMAUDOUT:
1374         {
1375                 struct v4l2_audioout *p = arg;
1376
1377                 if (!ops->vidioc_enumaudout)
1378                         break;
1379                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1380                 ret = ops->vidioc_enumaudout(file, fh, p);
1381                 if (!ret)
1382                         dbgarg2("index=%d, name=%s, capability=%d, "
1383                                         "mode=%d\n", p->index, p->name,
1384                                         p->capability, p->mode);
1385                 break;
1386         }
1387         case VIDIOC_G_AUDOUT:
1388         {
1389                 struct v4l2_audioout *p = arg;
1390
1391                 if (!ops->vidioc_g_audout)
1392                         break;
1393
1394                 ret = ops->vidioc_g_audout(file, fh, p);
1395                 if (!ret)
1396                         dbgarg2("index=%d, name=%s, capability=%d, "
1397                                         "mode=%d\n", p->index, p->name,
1398                                         p->capability, p->mode);
1399                 break;
1400         }
1401         case VIDIOC_S_AUDOUT:
1402         {
1403                 struct v4l2_audioout *p = arg;
1404
1405                 if (!ops->vidioc_s_audout)
1406                         break;
1407                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1408                                         "mode=%d\n", p->index, p->name,
1409                                         p->capability, p->mode);
1410
1411                 ret = ops->vidioc_s_audout(file, fh, p);
1412                 break;
1413         }
1414         case VIDIOC_G_MODULATOR:
1415         {
1416                 struct v4l2_modulator *p = arg;
1417
1418                 if (!ops->vidioc_g_modulator)
1419                         break;
1420                 ret = ops->vidioc_g_modulator(file, fh, p);
1421                 if (!ret)
1422                         dbgarg(cmd, "index=%d, name=%s, "
1423                                         "capability=%d, rangelow=%d,"
1424                                         " rangehigh=%d, txsubchans=%d\n",
1425                                         p->index, p->name, p->capability,
1426                                         p->rangelow, p->rangehigh,
1427                                         p->txsubchans);
1428                 break;
1429         }
1430         case VIDIOC_S_MODULATOR:
1431         {
1432                 struct v4l2_modulator *p = arg;
1433
1434                 if (!ops->vidioc_s_modulator)
1435                         break;
1436                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1437                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1438                                 p->index, p->name, p->capability, p->rangelow,
1439                                 p->rangehigh, p->txsubchans);
1440                         ret = ops->vidioc_s_modulator(file, fh, p);
1441                 break;
1442         }
1443         case VIDIOC_G_CROP:
1444         {
1445                 struct v4l2_crop *p = arg;
1446
1447                 if (!ops->vidioc_g_crop)
1448                         break;
1449
1450                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1451                 ret = ops->vidioc_g_crop(file, fh, p);
1452                 if (!ret)
1453                         dbgrect(vfd, "", &p->c);
1454                 break;
1455         }
1456         case VIDIOC_S_CROP:
1457         {
1458                 struct v4l2_crop *p = arg;
1459
1460                 if (!ops->vidioc_s_crop)
1461                         break;
1462                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1463                 dbgrect(vfd, "", &p->c);
1464                 ret = ops->vidioc_s_crop(file, fh, p);
1465                 break;
1466         }
1467         case VIDIOC_CROPCAP:
1468         {
1469                 struct v4l2_cropcap *p = arg;
1470
1471                 /*FIXME: Should also show v4l2_fract pixelaspect */
1472                 if (!ops->vidioc_cropcap)
1473                         break;
1474
1475                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1476                 ret = ops->vidioc_cropcap(file, fh, p);
1477                 if (!ret) {
1478                         dbgrect(vfd, "bounds ", &p->bounds);
1479                         dbgrect(vfd, "defrect ", &p->defrect);
1480                 }
1481                 break;
1482         }
1483         case VIDIOC_G_JPEGCOMP:
1484         {
1485                 struct v4l2_jpegcompression *p = arg;
1486
1487                 if (!ops->vidioc_g_jpegcomp)
1488                         break;
1489
1490                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1491                 if (!ret)
1492                         dbgarg(cmd, "quality=%d, APPn=%d, "
1493                                         "APP_len=%d, COM_len=%d, "
1494                                         "jpeg_markers=%d\n",
1495                                         p->quality, p->APPn, p->APP_len,
1496                                         p->COM_len, p->jpeg_markers);
1497                 break;
1498         }
1499         case VIDIOC_S_JPEGCOMP:
1500         {
1501                 struct v4l2_jpegcompression *p = arg;
1502
1503                 if (!ops->vidioc_g_jpegcomp)
1504                         break;
1505                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1506                                         "COM_len=%d, jpeg_markers=%d\n",
1507                                         p->quality, p->APPn, p->APP_len,
1508                                         p->COM_len, p->jpeg_markers);
1509                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1510                 break;
1511         }
1512         case VIDIOC_G_ENC_INDEX:
1513         {
1514                 struct v4l2_enc_idx *p = arg;
1515
1516                 if (!ops->vidioc_g_enc_index)
1517                         break;
1518                 ret = ops->vidioc_g_enc_index(file, fh, p);
1519                 if (!ret)
1520                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1521                                         p->entries, p->entries_cap);
1522                 break;
1523         }
1524         case VIDIOC_ENCODER_CMD:
1525         {
1526                 struct v4l2_encoder_cmd *p = arg;
1527
1528                 if (!ops->vidioc_encoder_cmd)
1529                         break;
1530                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1531                 if (!ret)
1532                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1533                 break;
1534         }
1535         case VIDIOC_TRY_ENCODER_CMD:
1536         {
1537                 struct v4l2_encoder_cmd *p = arg;
1538
1539                 if (!ops->vidioc_try_encoder_cmd)
1540                         break;
1541                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1542                 if (!ret)
1543                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1544                 break;
1545         }
1546         case VIDIOC_G_PARM:
1547         {
1548                 struct v4l2_streamparm *p = arg;
1549
1550                 if (ops->vidioc_g_parm) {
1551                         ret = check_fmt(ops, p->type);
1552                         if (ret)
1553                                 break;
1554                         ret = ops->vidioc_g_parm(file, fh, p);
1555                 } else {
1556                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1557                                 return -EINVAL;
1558
1559                         v4l2_video_std_frame_period(vfd->current_norm,
1560                                                     &p->parm.capture.timeperframe);
1561                         ret = 0;
1562                 }
1563
1564                 dbgarg(cmd, "type=%d\n", p->type);
1565                 break;
1566         }
1567         case VIDIOC_S_PARM:
1568         {
1569                 struct v4l2_streamparm *p = arg;
1570
1571                 if (!ops->vidioc_s_parm)
1572                         break;
1573                 ret = check_fmt(ops, p->type);
1574                 if (ret)
1575                         break;
1576
1577                 dbgarg(cmd, "type=%d\n", p->type);
1578                 ret = ops->vidioc_s_parm(file, fh, p);
1579                 break;
1580         }
1581         case VIDIOC_G_TUNER:
1582         {
1583                 struct v4l2_tuner *p = arg;
1584
1585                 if (!ops->vidioc_g_tuner)
1586                         break;
1587
1588                 ret = ops->vidioc_g_tuner(file, fh, p);
1589                 if (!ret)
1590                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1591                                         "capability=0x%x, rangelow=%d, "
1592                                         "rangehigh=%d, signal=%d, afc=%d, "
1593                                         "rxsubchans=0x%x, audmode=%d\n",
1594                                         p->index, p->name, p->type,
1595                                         p->capability, p->rangelow,
1596                                         p->rangehigh, p->signal, p->afc,
1597                                         p->rxsubchans, p->audmode);
1598                 break;
1599         }
1600         case VIDIOC_S_TUNER:
1601         {
1602                 struct v4l2_tuner *p = arg;
1603
1604                 if (!ops->vidioc_s_tuner)
1605                         break;
1606                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1607                                 "capability=0x%x, rangelow=%d, "
1608                                 "rangehigh=%d, signal=%d, afc=%d, "
1609                                 "rxsubchans=0x%x, audmode=%d\n",
1610                                 p->index, p->name, p->type,
1611                                 p->capability, p->rangelow,
1612                                 p->rangehigh, p->signal, p->afc,
1613                                 p->rxsubchans, p->audmode);
1614                 ret = ops->vidioc_s_tuner(file, fh, p);
1615                 break;
1616         }
1617         case VIDIOC_G_FREQUENCY:
1618         {
1619                 struct v4l2_frequency *p = arg;
1620
1621                 if (!ops->vidioc_g_frequency)
1622                         break;
1623
1624                 ret = ops->vidioc_g_frequency(file, fh, p);
1625                 if (!ret)
1626                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1627                                         p->tuner, p->type, p->frequency);
1628                 break;
1629         }
1630         case VIDIOC_S_FREQUENCY:
1631         {
1632                 struct v4l2_frequency *p = arg;
1633
1634                 if (!ops->vidioc_s_frequency)
1635                         break;
1636                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1637                                 p->tuner, p->type, p->frequency);
1638                 ret = ops->vidioc_s_frequency(file, fh, p);
1639                 break;
1640         }
1641         case VIDIOC_G_SLICED_VBI_CAP:
1642         {
1643                 struct v4l2_sliced_vbi_cap *p = arg;
1644
1645                 if (!ops->vidioc_g_sliced_vbi_cap)
1646                         break;
1647
1648                 /* Clear up to type, everything after type is zerod already */
1649                 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1650
1651                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1652                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1653                 if (!ret)
1654                         dbgarg2("service_set=%d\n", p->service_set);
1655                 break;
1656         }
1657         case VIDIOC_LOG_STATUS:
1658         {
1659                 if (!ops->vidioc_log_status)
1660                         break;
1661                 ret = ops->vidioc_log_status(file, fh);
1662                 break;
1663         }
1664 #ifdef CONFIG_VIDEO_ADV_DEBUG
1665         case VIDIOC_DBG_G_REGISTER:
1666         {
1667                 struct v4l2_dbg_register *p = arg;
1668
1669                 if (!capable(CAP_SYS_ADMIN))
1670                         ret = -EPERM;
1671                 else if (ops->vidioc_g_register)
1672                         ret = ops->vidioc_g_register(file, fh, p);
1673                 break;
1674         }
1675         case VIDIOC_DBG_S_REGISTER:
1676         {
1677                 struct v4l2_dbg_register *p = arg;
1678
1679                 if (!capable(CAP_SYS_ADMIN))
1680                         ret = -EPERM;
1681                 else if (ops->vidioc_s_register)
1682                         ret = ops->vidioc_s_register(file, fh, p);
1683                 break;
1684         }
1685 #endif
1686         case VIDIOC_DBG_G_CHIP_IDENT:
1687         {
1688                 struct v4l2_dbg_chip_ident *p = arg;
1689
1690                 if (!ops->vidioc_g_chip_ident)
1691                         break;
1692                 p->ident = V4L2_IDENT_NONE;
1693                 p->revision = 0;
1694                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1695                 if (!ret)
1696                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1697                 break;
1698         }
1699         case VIDIOC_S_HW_FREQ_SEEK:
1700         {
1701                 struct v4l2_hw_freq_seek *p = arg;
1702
1703                 if (!ops->vidioc_s_hw_freq_seek)
1704                         break;
1705                 dbgarg(cmd,
1706                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1707                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1708                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1709                 break;
1710         }
1711         case VIDIOC_ENUM_FRAMESIZES:
1712         {
1713                 struct v4l2_frmsizeenum *p = arg;
1714
1715                 if (!ops->vidioc_enum_framesizes)
1716                         break;
1717
1718                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1719                 dbgarg(cmd,
1720                         "index=%d, pixelformat=%d, type=%d ",
1721                         p->index, p->pixel_format, p->type);
1722                 switch (p->type) {
1723                 case V4L2_FRMSIZE_TYPE_DISCRETE:
1724                         dbgarg2("width = %d, height=%d\n",
1725                                 p->discrete.width, p->discrete.height);
1726                         break;
1727                 case V4L2_FRMSIZE_TYPE_STEPWISE:
1728                         dbgarg2("min %dx%d, max %dx%d, step %dx%d\n",
1729                                 p->stepwise.min_width,  p->stepwise.min_height,
1730                                 p->stepwise.step_width, p->stepwise.step_height,
1731                                 p->stepwise.max_width,  p->stepwise.max_height);
1732                         break;
1733                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1734                         dbgarg2("continuous\n");
1735                         break;
1736                 default:
1737                         dbgarg2("- Unknown type!\n");
1738                 }
1739
1740                 break;
1741         }
1742         case VIDIOC_ENUM_FRAMEINTERVALS:
1743         {
1744                 struct v4l2_frmivalenum *p = arg;
1745
1746                 if (!ops->vidioc_enum_frameintervals)
1747                         break;
1748
1749                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1750                 dbgarg(cmd,
1751                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1752                         p->index, p->pixel_format,
1753                         p->width, p->height, p->type);
1754                 switch (p->type) {
1755                 case V4L2_FRMIVAL_TYPE_DISCRETE:
1756                         dbgarg2("fps=%d/%d\n",
1757                                 p->discrete.numerator,
1758                                 p->discrete.denominator);
1759                         break;
1760                 case V4L2_FRMIVAL_TYPE_STEPWISE:
1761                         dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
1762                                 p->stepwise.min.numerator,
1763                                 p->stepwise.min.denominator,
1764                                 p->stepwise.max.numerator,
1765                                 p->stepwise.max.denominator,
1766                                 p->stepwise.step.numerator,
1767                                 p->stepwise.step.denominator);
1768                         break;
1769                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1770                         dbgarg2("continuous\n");
1771                         break;
1772                 default:
1773                         dbgarg2("- Unknown type!\n");
1774                 }
1775                 break;
1776         }
1777
1778         default:
1779         {
1780                 if (!ops->vidioc_default)
1781                         break;
1782                 ret = ops->vidioc_default(file, fh, cmd, arg);
1783                 break;
1784         }
1785         } /* switch */
1786
1787         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1788                 if (ret < 0) {
1789                         v4l_print_ioctl(vfd->name, cmd);
1790                         printk(KERN_CONT " error %ld\n", ret);
1791                 }
1792         }
1793
1794         return ret;
1795 }
1796
1797 /* In some cases, only a few fields are used as input, i.e. when the app sets
1798  * "index" and then the driver fills in the rest of the structure for the thing
1799  * with that index.  We only need to copy up the first non-input field.  */
1800 static unsigned long cmd_input_size(unsigned int cmd)
1801 {
1802         /* Size of structure up to and including 'field' */
1803 #define CMDINSIZE(cmd, type, field)                             \
1804         case VIDIOC_##cmd:                                      \
1805                 return offsetof(struct v4l2_##type, field) +    \
1806                         sizeof(((struct v4l2_##type *)0)->field);
1807
1808         switch (cmd) {
1809                 CMDINSIZE(ENUM_FMT,             fmtdesc,        type);
1810                 CMDINSIZE(G_FMT,                format,         type);
1811                 CMDINSIZE(QUERYBUF,             buffer,         type);
1812                 CMDINSIZE(G_PARM,               streamparm,     type);
1813                 CMDINSIZE(ENUMSTD,              standard,       index);
1814                 CMDINSIZE(ENUMINPUT,            input,          index);
1815                 CMDINSIZE(G_CTRL,               control,        id);
1816                 CMDINSIZE(G_TUNER,              tuner,          index);
1817                 CMDINSIZE(QUERYCTRL,            queryctrl,      id);
1818                 CMDINSIZE(QUERYMENU,            querymenu,      index);
1819                 CMDINSIZE(ENUMOUTPUT,           output,         index);
1820                 CMDINSIZE(G_MODULATOR,          modulator,      index);
1821                 CMDINSIZE(G_FREQUENCY,          frequency,      tuner);
1822                 CMDINSIZE(CROPCAP,              cropcap,        type);
1823                 CMDINSIZE(G_CROP,               crop,           type);
1824                 CMDINSIZE(ENUMAUDIO,            audio,          index);
1825                 CMDINSIZE(ENUMAUDOUT,           audioout,       index);
1826                 CMDINSIZE(ENCODER_CMD,          encoder_cmd,    flags);
1827                 CMDINSIZE(TRY_ENCODER_CMD,      encoder_cmd,    flags);
1828                 CMDINSIZE(G_SLICED_VBI_CAP,     sliced_vbi_cap, type);
1829                 CMDINSIZE(ENUM_FRAMESIZES,      frmsizeenum,    pixel_format);
1830                 CMDINSIZE(ENUM_FRAMEINTERVALS,  frmivalenum,    height);
1831         default:
1832                 return _IOC_SIZE(cmd);
1833         }
1834 }
1835
1836 long video_ioctl2(struct file *file,
1837                unsigned int cmd, unsigned long arg)
1838 {
1839         char    sbuf[128];
1840         void    *mbuf = NULL;
1841         void    *parg = NULL;
1842         long    err  = -EINVAL;
1843         int     is_ext_ctrl;
1844         size_t  ctrls_size = 0;
1845         void __user *user_ptr = NULL;
1846
1847 #ifdef __OLD_VIDIOC_
1848         cmd = video_fix_command(cmd);
1849 #endif
1850         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
1851                        cmd == VIDIOC_TRY_EXT_CTRLS);
1852
1853         /*  Copy arguments into temp kernel buffer  */
1854         if (_IOC_DIR(cmd) != _IOC_NONE) {
1855                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1856                         parg = sbuf;
1857                 } else {
1858                         /* too big to allocate from stack */
1859                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1860                         if (NULL == mbuf)
1861                                 return -ENOMEM;
1862                         parg = mbuf;
1863                 }
1864
1865                 err = -EFAULT;
1866                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
1867                         unsigned long n = cmd_input_size(cmd);
1868
1869                         if (copy_from_user(parg, (void __user *)arg, n))
1870                                 goto out;
1871
1872                         /* zero out anything we don't copy from userspace */
1873                         if (n < _IOC_SIZE(cmd))
1874                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
1875                 } else {
1876                         /* read-only ioctl */
1877                         memset(parg, 0, _IOC_SIZE(cmd));
1878                 }
1879         }
1880
1881         if (is_ext_ctrl) {
1882                 struct v4l2_ext_controls *p = parg;
1883
1884                 /* In case of an error, tell the caller that it wasn't
1885                    a specific control that caused it. */
1886                 p->error_idx = p->count;
1887                 user_ptr = (void __user *)p->controls;
1888                 if (p->count) {
1889                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1890                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1891                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1892                         err = -ENOMEM;
1893                         if (NULL == mbuf)
1894                                 goto out_ext_ctrl;
1895                         err = -EFAULT;
1896                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1897                                 goto out_ext_ctrl;
1898                         p->controls = mbuf;
1899                 }
1900         }
1901
1902         /* Handles IOCTL */
1903         err = __video_do_ioctl(file, cmd, parg);
1904         if (err == -ENOIOCTLCMD)
1905                 err = -EINVAL;
1906         if (is_ext_ctrl) {
1907                 struct v4l2_ext_controls *p = parg;
1908
1909                 p->controls = (void *)user_ptr;
1910                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1911                         err = -EFAULT;
1912                 goto out_ext_ctrl;
1913         }
1914         if (err < 0)
1915                 goto out;
1916
1917 out_ext_ctrl:
1918         /*  Copy results into user buffer  */
1919         switch (_IOC_DIR(cmd)) {
1920         case _IOC_READ:
1921         case (_IOC_WRITE | _IOC_READ):
1922                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1923                         err = -EFAULT;
1924                 break;
1925         }
1926
1927 out:
1928         kfree(mbuf);
1929         return err;
1930 }
1931 EXPORT_SYMBOL(video_ioctl2);