V4L/DVB (9578): v4l core: add support for enumerating frame sizes and intervals
[linux-2.6.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/videodev2.h>
21
22 #ifdef CONFIG_VIDEO_V4L1
23 #include <linux/videodev.h>
24 #endif
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-ioctl.h>
27 #include <linux/video_decoder.h>
28
29 #define dbgarg(cmd, fmt, arg...) \
30                 do {                                                    \
31                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {            \
32                         printk(KERN_DEBUG "%s: ",  vfd->name);          \
33                         v4l_printk_ioctl(cmd);                          \
34                         printk(" " fmt,  ## arg);                       \
35                     }                                                   \
36                 } while (0)
37
38 #define dbgarg2(fmt, arg...) \
39                 do {                                                    \
40                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
41                         printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
42                 } while (0)
43
44 struct std_descr {
45         v4l2_std_id std;
46         const char *descr;
47 };
48
49 static const struct std_descr standards[] = {
50         { V4L2_STD_NTSC,        "NTSC"      },
51         { V4L2_STD_NTSC_M,      "NTSC-M"    },
52         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
53         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
54         { V4L2_STD_NTSC_443,    "NTSC-443"  },
55         { V4L2_STD_PAL,         "PAL"       },
56         { V4L2_STD_PAL_BG,      "PAL-BG"    },
57         { V4L2_STD_PAL_B,       "PAL-B"     },
58         { V4L2_STD_PAL_B1,      "PAL-B1"    },
59         { V4L2_STD_PAL_G,       "PAL-G"     },
60         { V4L2_STD_PAL_H,       "PAL-H"     },
61         { V4L2_STD_PAL_I,       "PAL-I"     },
62         { V4L2_STD_PAL_DK,      "PAL-DK"    },
63         { V4L2_STD_PAL_D,       "PAL-D"     },
64         { V4L2_STD_PAL_D1,      "PAL-D1"    },
65         { V4L2_STD_PAL_K,       "PAL-K"     },
66         { V4L2_STD_PAL_M,       "PAL-M"     },
67         { V4L2_STD_PAL_N,       "PAL-N"     },
68         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
69         { V4L2_STD_PAL_60,      "PAL-60"    },
70         { V4L2_STD_SECAM,       "SECAM"     },
71         { V4L2_STD_SECAM_B,     "SECAM-B"   },
72         { V4L2_STD_SECAM_G,     "SECAM-G"   },
73         { V4L2_STD_SECAM_H,     "SECAM-H"   },
74         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
75         { V4L2_STD_SECAM_D,     "SECAM-D"   },
76         { V4L2_STD_SECAM_K,     "SECAM-K"   },
77         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
78         { V4L2_STD_SECAM_L,     "SECAM-L"   },
79         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
80         { 0,                    "Unknown"   }
81 };
82
83 /* video4linux standard ID conversion to standard name
84  */
85 const char *v4l2_norm_to_name(v4l2_std_id id)
86 {
87         u32 myid = id;
88         int i;
89
90         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
91            64 bit comparations. So, on that architecture, with some gcc
92            variants, compilation fails. Currently, the max value is 30bit wide.
93          */
94         BUG_ON(myid != id);
95
96         for (i = 0; standards[i].std; i++)
97                 if (myid == standards[i].std)
98                         break;
99         return standards[i].descr;
100 }
101 EXPORT_SYMBOL(v4l2_norm_to_name);
102
103 /* Fill in the fields of a v4l2_standard structure according to the
104    'id' and 'transmission' parameters.  Returns negative on error.  */
105 int v4l2_video_std_construct(struct v4l2_standard *vs,
106                              int id, const char *name)
107 {
108         u32 index = vs->index;
109
110         memset(vs, 0, sizeof(struct v4l2_standard));
111         vs->index = index;
112         vs->id    = id;
113         if (id & V4L2_STD_525_60) {
114                 vs->frameperiod.numerator = 1001;
115                 vs->frameperiod.denominator = 30000;
116                 vs->framelines = 525;
117         } else {
118                 vs->frameperiod.numerator = 1;
119                 vs->frameperiod.denominator = 25;
120                 vs->framelines = 625;
121         }
122         strlcpy(vs->name, name, sizeof(vs->name));
123         return 0;
124 }
125 EXPORT_SYMBOL(v4l2_video_std_construct);
126
127 /* ----------------------------------------------------------------- */
128 /* some arrays for pretty-printing debug messages of enum types      */
129
130 const char *v4l2_field_names[] = {
131         [V4L2_FIELD_ANY]        = "any",
132         [V4L2_FIELD_NONE]       = "none",
133         [V4L2_FIELD_TOP]        = "top",
134         [V4L2_FIELD_BOTTOM]     = "bottom",
135         [V4L2_FIELD_INTERLACED] = "interlaced",
136         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
137         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
138         [V4L2_FIELD_ALTERNATE]  = "alternate",
139         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
140         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
141 };
142 EXPORT_SYMBOL(v4l2_field_names);
143
144 const char *v4l2_type_names[] = {
145         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
146         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
147         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
148         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
149         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
150         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
151         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
152         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
153 };
154 EXPORT_SYMBOL(v4l2_type_names);
155
156 static const char *v4l2_memory_names[] = {
157         [V4L2_MEMORY_MMAP]    = "mmap",
158         [V4L2_MEMORY_USERPTR] = "userptr",
159         [V4L2_MEMORY_OVERLAY] = "overlay",
160 };
161
162 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
163                            arr[a] : "unknown")
164
165 /* ------------------------------------------------------------------ */
166 /* debug help functions                                               */
167
168 #ifdef CONFIG_VIDEO_V4L1_COMPAT
169 static const char *v4l1_ioctls[] = {
170         [_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
171         [_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
172         [_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
173         [_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
174         [_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
175         [_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
176         [_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
177         [_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
178         [_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
179         [_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
180         [_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
181         [_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
182         [_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
183         [_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
184         [_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
185         [_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
186         [_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
187         [_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
188         [_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
189         [_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
190         [_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
191         [_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
192         [_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
193         [_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
194         [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
195         [_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
196         [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
197         [_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
198         [_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
199 };
200 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
201 #endif
202
203 static const char *v4l2_ioctls[] = {
204         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
205         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
206         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
207         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
208         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
209         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
210         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
211         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
212         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
213         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
214         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
215         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
216         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
217         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
218         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
219         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
220         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
221         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
222         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
223         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
224         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
225         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
226         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
227         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
228         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
229         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
230         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
231         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
232         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
233         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
234         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
235         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
236         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
237         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
238         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
239         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
240         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
241         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
242         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
243         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
244         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
245         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
246         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
247         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
248         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
249         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
250         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
251         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
252         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
253         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
254         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
255         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
256         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
257         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
258         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
259 #if 1
260         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
261         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
262         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
263         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
264         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
265
266         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
267         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
268
269         [_IOC_NR(VIDIOC_G_CHIP_IDENT)]     = "VIDIOC_G_CHIP_IDENT",
270         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
271 #endif
272 };
273 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
274
275 static const char *v4l2_int_ioctls[] = {
276 #ifdef CONFIG_VIDEO_V4L1_COMPAT
277         [_IOC_NR(DECODER_GET_CAPABILITIES)]    = "DECODER_GET_CAPABILITIES",
278         [_IOC_NR(DECODER_GET_STATUS)]          = "DECODER_GET_STATUS",
279         [_IOC_NR(DECODER_SET_NORM)]            = "DECODER_SET_NORM",
280         [_IOC_NR(DECODER_SET_INPUT)]           = "DECODER_SET_INPUT",
281         [_IOC_NR(DECODER_SET_OUTPUT)]          = "DECODER_SET_OUTPUT",
282         [_IOC_NR(DECODER_ENABLE_OUTPUT)]       = "DECODER_ENABLE_OUTPUT",
283         [_IOC_NR(DECODER_SET_PICTURE)]         = "DECODER_SET_PICTURE",
284         [_IOC_NR(DECODER_SET_GPIO)]            = "DECODER_SET_GPIO",
285         [_IOC_NR(DECODER_INIT)]                = "DECODER_INIT",
286         [_IOC_NR(DECODER_SET_VBI_BYPASS)]      = "DECODER_SET_VBI_BYPASS",
287         [_IOC_NR(DECODER_DUMP)]                = "DECODER_DUMP",
288 #endif
289         [_IOC_NR(AUDC_SET_RADIO)]              = "AUDC_SET_RADIO",
290
291         [_IOC_NR(TUNER_SET_TYPE_ADDR)]         = "TUNER_SET_TYPE_ADDR",
292         [_IOC_NR(TUNER_SET_STANDBY)]           = "TUNER_SET_STANDBY",
293         [_IOC_NR(TUNER_SET_CONFIG)]            = "TUNER_SET_CONFIG",
294
295         [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)]     = "VIDIOC_INT_S_TUNER_MODE",
296         [_IOC_NR(VIDIOC_INT_RESET)]            = "VIDIOC_INT_RESET",
297         [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
298         [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)]  = "VIDIOC_INT_DECODE_VBI_LINE",
299         [_IOC_NR(VIDIOC_INT_S_VBI_DATA)]       = "VIDIOC_INT_S_VBI_DATA",
300         [_IOC_NR(VIDIOC_INT_G_VBI_DATA)]       = "VIDIOC_INT_G_VBI_DATA",
301         [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)]   = "VIDIOC_INT_I2S_CLOCK_FREQ",
302         [_IOC_NR(VIDIOC_INT_S_STANDBY)]        = "VIDIOC_INT_S_STANDBY",
303         [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)]  = "VIDIOC_INT_S_AUDIO_ROUTING",
304         [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)]  = "VIDIOC_INT_G_AUDIO_ROUTING",
305         [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)]  = "VIDIOC_INT_S_VIDEO_ROUTING",
306         [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)]  = "VIDIOC_INT_G_VIDEO_ROUTING",
307         [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)]   = "VIDIOC_INT_S_CRYSTAL_FREQ",
308         [_IOC_NR(VIDIOC_INT_INIT)]             = "VIDIOC_INT_INIT",
309         [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)]     = "VIDIOC_INT_G_STD_OUTPUT",
310         [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)]     = "VIDIOC_INT_S_STD_OUTPUT",
311 };
312 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
313
314 /* Common ioctl debug function. This function can be used by
315    external ioctl messages as well as internal V4L ioctl */
316 void v4l_printk_ioctl(unsigned int cmd)
317 {
318         char *dir, *type;
319
320         switch (_IOC_TYPE(cmd)) {
321         case 'd':
322                 if (_IOC_NR(cmd) >= V4L2_INT_IOCTLS) {
323                         type = "v4l2_int";
324                         break;
325                 }
326                 printk("%s", v4l2_int_ioctls[_IOC_NR(cmd)]);
327                 return;
328 #ifdef CONFIG_VIDEO_V4L1_COMPAT
329         case 'v':
330                 if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
331                         type = "v4l1";
332                         break;
333                 }
334                 printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
335                 return;
336 #endif
337         case 'V':
338                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
339                         type = "v4l2";
340                         break;
341                 }
342                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
343                 return;
344         default:
345                 type = "unknown";
346         }
347
348         switch (_IOC_DIR(cmd)) {
349         case _IOC_NONE:              dir = "--"; break;
350         case _IOC_READ:              dir = "r-"; break;
351         case _IOC_WRITE:             dir = "-w"; break;
352         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
353         default:                     dir = "*ERR*"; break;
354         }
355         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
356                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
357 }
358 EXPORT_SYMBOL(v4l_printk_ioctl);
359
360 /*
361  * helper function -- handles userspace copying for ioctl arguments
362  */
363
364 #ifdef __OLD_VIDIOC_
365 static unsigned int
366 video_fix_command(unsigned int cmd)
367 {
368         switch (cmd) {
369         case VIDIOC_OVERLAY_OLD:
370                 cmd = VIDIOC_OVERLAY;
371                 break;
372         case VIDIOC_S_PARM_OLD:
373                 cmd = VIDIOC_S_PARM;
374                 break;
375         case VIDIOC_S_CTRL_OLD:
376                 cmd = VIDIOC_S_CTRL;
377                 break;
378         case VIDIOC_G_AUDIO_OLD:
379                 cmd = VIDIOC_G_AUDIO;
380                 break;
381         case VIDIOC_G_AUDOUT_OLD:
382                 cmd = VIDIOC_G_AUDOUT;
383                 break;
384         case VIDIOC_CROPCAP_OLD:
385                 cmd = VIDIOC_CROPCAP;
386                 break;
387         }
388         return cmd;
389 }
390 #endif
391
392 /*
393  * Obsolete usercopy function - Should be removed soon
394  */
395 int
396 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
397                 v4l2_kioctl func)
398 {
399         char    sbuf[128];
400         void    *mbuf = NULL;
401         void    *parg = NULL;
402         int     err  = -EINVAL;
403         int     is_ext_ctrl;
404         size_t  ctrls_size = 0;
405         void __user *user_ptr = NULL;
406
407 #ifdef __OLD_VIDIOC_
408         cmd = video_fix_command(cmd);
409 #endif
410         is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
411                        cmd == VIDIOC_TRY_EXT_CTRLS);
412
413         /*  Copy arguments into temp kernel buffer  */
414         switch (_IOC_DIR(cmd)) {
415         case _IOC_NONE:
416                 parg = NULL;
417                 break;
418         case _IOC_READ:
419         case _IOC_WRITE:
420         case (_IOC_WRITE | _IOC_READ):
421                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
422                         parg = sbuf;
423                 } else {
424                         /* too big to allocate from stack */
425                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
426                         if (NULL == mbuf)
427                                 return -ENOMEM;
428                         parg = mbuf;
429                 }
430
431                 err = -EFAULT;
432                 if (_IOC_DIR(cmd) & _IOC_WRITE)
433                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
434                                 goto out;
435                 break;
436         }
437         if (is_ext_ctrl) {
438                 struct v4l2_ext_controls *p = parg;
439
440                 /* In case of an error, tell the caller that it wasn't
441                    a specific control that caused it. */
442                 p->error_idx = p->count;
443                 user_ptr = (void __user *)p->controls;
444                 if (p->count) {
445                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
446                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
447                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
448                         err = -ENOMEM;
449                         if (NULL == mbuf)
450                                 goto out_ext_ctrl;
451                         err = -EFAULT;
452                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
453                                 goto out_ext_ctrl;
454                         p->controls = mbuf;
455                 }
456         }
457
458         /* call driver */
459         err = func(file, cmd, parg);
460         if (err == -ENOIOCTLCMD)
461                 err = -EINVAL;
462         if (is_ext_ctrl) {
463                 struct v4l2_ext_controls *p = parg;
464
465                 p->controls = (void *)user_ptr;
466                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
467                         err = -EFAULT;
468                 goto out_ext_ctrl;
469         }
470         if (err < 0)
471                 goto out;
472
473 out_ext_ctrl:
474         /*  Copy results into user buffer  */
475         switch (_IOC_DIR(cmd)) {
476         case _IOC_READ:
477         case (_IOC_WRITE | _IOC_READ):
478                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
479                         err = -EFAULT;
480                 break;
481         }
482
483 out:
484         kfree(mbuf);
485         return err;
486 }
487 EXPORT_SYMBOL(video_usercopy);
488
489 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
490                                         struct v4l2_buffer *p)
491 {
492         struct v4l2_timecode *tc = &p->timecode;
493
494         dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
495                 "bytesused=%d, flags=0x%08d, "
496                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
497                         p->timestamp.tv_sec / 3600,
498                         (int)(p->timestamp.tv_sec / 60) % 60,
499                         (int)(p->timestamp.tv_sec % 60),
500                         (long)p->timestamp.tv_usec,
501                         p->index,
502                         prt_names(p->type, v4l2_type_names),
503                         p->bytesused, p->flags,
504                         p->field, p->sequence,
505                         prt_names(p->memory, v4l2_memory_names),
506                         p->m.userptr, p->length);
507         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
508                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
509                         tc->hours, tc->minutes, tc->seconds,
510                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
511 }
512
513 static inline void dbgrect(struct video_device *vfd, char *s,
514                                                         struct v4l2_rect *r)
515 {
516         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
517                                                 r->width, r->height);
518 };
519
520 static inline void v4l_print_pix_fmt(struct video_device *vfd,
521                                                 struct v4l2_pix_format *fmt)
522 {
523         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
524                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
525                 fmt->width, fmt->height,
526                 (fmt->pixelformat & 0xff),
527                 (fmt->pixelformat >>  8) & 0xff,
528                 (fmt->pixelformat >> 16) & 0xff,
529                 (fmt->pixelformat >> 24) & 0xff,
530                 prt_names(fmt->field, v4l2_field_names),
531                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
532 };
533
534 static inline void v4l_print_ext_ctrls(unsigned int cmd,
535         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
536 {
537         __u32 i;
538
539         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
540                 return;
541         dbgarg(cmd, "");
542         printk(KERN_CONT "class=0x%x", c->ctrl_class);
543         for (i = 0; i < c->count; i++) {
544                 if (show_vals)
545                         printk(KERN_CONT " id/val=0x%x/0x%x",
546                                 c->controls[i].id, c->controls[i].value);
547                 else
548                         printk(KERN_CONT " id=0x%x", c->controls[i].id);
549         }
550         printk(KERN_CONT "\n");
551 };
552
553 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
554 {
555         __u32 i;
556
557         /* zero the reserved fields */
558         c->reserved[0] = c->reserved[1] = 0;
559         for (i = 0; i < c->count; i++) {
560                 c->controls[i].reserved2[0] = 0;
561                 c->controls[i].reserved2[1] = 0;
562         }
563         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
564            when using extended controls.
565            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
566            is it allowed for backwards compatibility.
567          */
568         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
569                 return 0;
570         /* Check that all controls are from the same control class. */
571         for (i = 0; i < c->count; i++) {
572                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
573                         c->error_idx = i;
574                         return 0;
575                 }
576         }
577         return 1;
578 }
579
580 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
581 {
582         if (ops == NULL)
583                 return -EINVAL;
584
585         switch (type) {
586         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
587                 if (ops->vidioc_try_fmt_vid_cap)
588                         return 0;
589                 break;
590         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
591                 if (ops->vidioc_try_fmt_vid_overlay)
592                         return 0;
593                 break;
594         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
595                 if (ops->vidioc_try_fmt_vid_out)
596                         return 0;
597                 break;
598         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
599                 if (ops->vidioc_try_fmt_vid_out_overlay)
600                         return 0;
601                 break;
602         case V4L2_BUF_TYPE_VBI_CAPTURE:
603                 if (ops->vidioc_try_fmt_vbi_cap)
604                         return 0;
605                 break;
606         case V4L2_BUF_TYPE_VBI_OUTPUT:
607                 if (ops->vidioc_try_fmt_vbi_out)
608                         return 0;
609                 break;
610         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
611                 if (ops->vidioc_try_fmt_sliced_vbi_cap)
612                         return 0;
613                 break;
614         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
615                 if (ops->vidioc_try_fmt_sliced_vbi_out)
616                         return 0;
617                 break;
618         case V4L2_BUF_TYPE_PRIVATE:
619                 if (ops->vidioc_try_fmt_type_private)
620                         return 0;
621                 break;
622         }
623         return -EINVAL;
624 }
625
626 static int __video_do_ioctl(struct file *file,
627                 unsigned int cmd, void *arg)
628 {
629         struct video_device *vfd = video_devdata(file);
630         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
631         void *fh = file->private_data;
632         int ret = -EINVAL;
633
634         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
635                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
636                 v4l_print_ioctl(vfd->name, cmd);
637                 printk(KERN_CONT "\n");
638         }
639
640         if (ops == NULL) {
641                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
642                                 vfd->name);
643                 return -EINVAL;
644         }
645
646 #ifdef CONFIG_VIDEO_V4L1_COMPAT
647         /***********************************************************
648          Handles calls to the obsoleted V4L1 API
649          Due to the nature of VIDIOCGMBUF, each driver that supports
650          V4L1 should implement its own handler for this ioctl.
651          ***********************************************************/
652
653         /* --- streaming capture ------------------------------------- */
654         if (cmd == VIDIOCGMBUF) {
655                 struct video_mbuf *p = arg;
656
657                 memset(p, 0, sizeof(*p));
658
659                 if (!ops->vidiocgmbuf)
660                         return ret;
661                 ret = ops->vidiocgmbuf(file, fh, p);
662                 if (!ret)
663                         dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
664                                                 p->size, p->frames,
665                                                 (unsigned long)p->offsets);
666                 return ret;
667         }
668
669         /********************************************************
670          All other V4L1 calls are handled by v4l1_compat module.
671          Those calls will be translated into V4L2 calls, and
672          __video_do_ioctl will be called again, with one or more
673          V4L2 ioctls.
674          ********************************************************/
675         if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
676                 return v4l_compat_translate_ioctl(file, cmd, arg,
677                                                 __video_do_ioctl);
678 #endif
679
680         switch (cmd) {
681         /* --- capabilities ------------------------------------------ */
682         case VIDIOC_QUERYCAP:
683         {
684                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
685                 memset(cap, 0, sizeof(*cap));
686
687                 if (!ops->vidioc_querycap)
688                         break;
689
690                 ret = ops->vidioc_querycap(file, fh, cap);
691                 if (!ret)
692                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
693                                         "version=0x%08x, "
694                                         "capabilities=0x%08x\n",
695                                         cap->driver, cap->card, cap->bus_info,
696                                         cap->version,
697                                         cap->capabilities);
698                 break;
699         }
700
701         /* --- priority ------------------------------------------ */
702         case VIDIOC_G_PRIORITY:
703         {
704                 enum v4l2_priority *p = arg;
705
706                 if (!ops->vidioc_g_priority)
707                         break;
708                 ret = ops->vidioc_g_priority(file, fh, p);
709                 if (!ret)
710                         dbgarg(cmd, "priority is %d\n", *p);
711                 break;
712         }
713         case VIDIOC_S_PRIORITY:
714         {
715                 enum v4l2_priority *p = arg;
716
717                 if (!ops->vidioc_s_priority)
718                         break;
719                 dbgarg(cmd, "setting priority to %d\n", *p);
720                 ret = ops->vidioc_s_priority(file, fh, *p);
721                 break;
722         }
723
724         /* --- capture ioctls ---------------------------------------- */
725         case VIDIOC_ENUM_FMT:
726         {
727                 struct v4l2_fmtdesc *f = arg;
728                 enum v4l2_buf_type type;
729                 unsigned int index;
730
731                 index = f->index;
732                 type  = f->type;
733                 memset(f, 0, sizeof(*f));
734                 f->index = index;
735                 f->type  = type;
736
737                 switch (type) {
738                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
739                         if (ops->vidioc_enum_fmt_vid_cap)
740                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
741                         break;
742                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
743                         if (ops->vidioc_enum_fmt_vid_overlay)
744                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
745                                         fh, f);
746                         break;
747                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
748                         if (ops->vidioc_enum_fmt_vid_out)
749                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
750                         break;
751                 case V4L2_BUF_TYPE_PRIVATE:
752                         if (ops->vidioc_enum_fmt_type_private)
753                                 ret = ops->vidioc_enum_fmt_type_private(file,
754                                                                 fh, f);
755                         break;
756                 default:
757                         break;
758                 }
759                 if (!ret)
760                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
761                                 "pixelformat=%c%c%c%c, description='%s'\n",
762                                 f->index, f->type, f->flags,
763                                 (f->pixelformat & 0xff),
764                                 (f->pixelformat >>  8) & 0xff,
765                                 (f->pixelformat >> 16) & 0xff,
766                                 (f->pixelformat >> 24) & 0xff,
767                                 f->description);
768                 break;
769         }
770         case VIDIOC_G_FMT:
771         {
772                 struct v4l2_format *f = (struct v4l2_format *)arg;
773
774                 memset(f->fmt.raw_data, 0, sizeof(f->fmt.raw_data));
775
776                 /* FIXME: Should be one dump per type */
777                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
778
779                 switch (f->type) {
780                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
781                         if (ops->vidioc_g_fmt_vid_cap)
782                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
783                         if (!ret)
784                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
785                         break;
786                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
787                         if (ops->vidioc_g_fmt_vid_overlay)
788                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
789                                                                     fh, f);
790                         break;
791                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
792                         if (ops->vidioc_g_fmt_vid_out)
793                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
794                         if (!ret)
795                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
796                         break;
797                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
798                         if (ops->vidioc_g_fmt_vid_out_overlay)
799                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
800                                        fh, f);
801                         break;
802                 case V4L2_BUF_TYPE_VBI_CAPTURE:
803                         if (ops->vidioc_g_fmt_vbi_cap)
804                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
805                         break;
806                 case V4L2_BUF_TYPE_VBI_OUTPUT:
807                         if (ops->vidioc_g_fmt_vbi_out)
808                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
809                         break;
810                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
811                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
812                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
813                                                                         fh, f);
814                         break;
815                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
816                         if (ops->vidioc_g_fmt_sliced_vbi_out)
817                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
818                                                                         fh, f);
819                         break;
820                 case V4L2_BUF_TYPE_PRIVATE:
821                         if (ops->vidioc_g_fmt_type_private)
822                                 ret = ops->vidioc_g_fmt_type_private(file,
823                                                                 fh, f);
824                         break;
825                 }
826
827                 break;
828         }
829         case VIDIOC_S_FMT:
830         {
831                 struct v4l2_format *f = (struct v4l2_format *)arg;
832
833                 /* FIXME: Should be one dump per type */
834                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
835
836                 switch (f->type) {
837                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
838                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
839                         if (ops->vidioc_s_fmt_vid_cap)
840                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
841                         break;
842                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
843                         if (ops->vidioc_s_fmt_vid_overlay)
844                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
845                                                                     fh, f);
846                         break;
847                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
848                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
849                         if (ops->vidioc_s_fmt_vid_out)
850                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
851                         break;
852                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
853                         if (ops->vidioc_s_fmt_vid_out_overlay)
854                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
855                                         fh, f);
856                         break;
857                 case V4L2_BUF_TYPE_VBI_CAPTURE:
858                         if (ops->vidioc_s_fmt_vbi_cap)
859                                 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
860                         break;
861                 case V4L2_BUF_TYPE_VBI_OUTPUT:
862                         if (ops->vidioc_s_fmt_vbi_out)
863                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
864                         break;
865                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
866                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
867                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
868                                                                         fh, f);
869                         break;
870                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
871                         if (ops->vidioc_s_fmt_sliced_vbi_out)
872                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
873                                                                         fh, f);
874                         break;
875                 case V4L2_BUF_TYPE_PRIVATE:
876                         if (ops->vidioc_s_fmt_type_private)
877                                 ret = ops->vidioc_s_fmt_type_private(file,
878                                                                 fh, f);
879                         break;
880                 }
881                 break;
882         }
883         case VIDIOC_TRY_FMT:
884         {
885                 struct v4l2_format *f = (struct v4l2_format *)arg;
886
887                 /* FIXME: Should be one dump per type */
888                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
889                                                 v4l2_type_names));
890                 switch (f->type) {
891                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
892                         if (ops->vidioc_try_fmt_vid_cap)
893                                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
894                         if (!ret)
895                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
896                         break;
897                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
898                         if (ops->vidioc_try_fmt_vid_overlay)
899                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
900                                         fh, f);
901                         break;
902                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
903                         if (ops->vidioc_try_fmt_vid_out)
904                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
905                         if (!ret)
906                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
907                         break;
908                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
909                         if (ops->vidioc_try_fmt_vid_out_overlay)
910                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
911                                        fh, f);
912                         break;
913                 case V4L2_BUF_TYPE_VBI_CAPTURE:
914                         if (ops->vidioc_try_fmt_vbi_cap)
915                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
916                         break;
917                 case V4L2_BUF_TYPE_VBI_OUTPUT:
918                         if (ops->vidioc_try_fmt_vbi_out)
919                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
920                         break;
921                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
922                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
923                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
924                                                                 fh, f);
925                         break;
926                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
927                         if (ops->vidioc_try_fmt_sliced_vbi_out)
928                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
929                                                                 fh, f);
930                         break;
931                 case V4L2_BUF_TYPE_PRIVATE:
932                         if (ops->vidioc_try_fmt_type_private)
933                                 ret = ops->vidioc_try_fmt_type_private(file,
934                                                                 fh, f);
935                         break;
936                 }
937
938                 break;
939         }
940         /* FIXME: Those buf reqs could be handled here,
941            with some changes on videobuf to allow its header to be included at
942            videodev2.h or being merged at videodev2.
943          */
944         case VIDIOC_REQBUFS:
945         {
946                 struct v4l2_requestbuffers *p = arg;
947
948                 if (!ops->vidioc_reqbufs)
949                         break;
950                 ret = check_fmt(ops, p->type);
951                 if (ret)
952                         break;
953
954                 ret = ops->vidioc_reqbufs(file, fh, p);
955                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
956                                 p->count,
957                                 prt_names(p->type, v4l2_type_names),
958                                 prt_names(p->memory, v4l2_memory_names));
959                 break;
960         }
961         case VIDIOC_QUERYBUF:
962         {
963                 struct v4l2_buffer *p = arg;
964
965                 if (!ops->vidioc_querybuf)
966                         break;
967                 ret = check_fmt(ops, p->type);
968                 if (ret)
969                         break;
970
971                 ret = ops->vidioc_querybuf(file, fh, p);
972                 if (!ret)
973                         dbgbuf(cmd, vfd, p);
974                 break;
975         }
976         case VIDIOC_QBUF:
977         {
978                 struct v4l2_buffer *p = arg;
979
980                 if (!ops->vidioc_qbuf)
981                         break;
982                 ret = check_fmt(ops, p->type);
983                 if (ret)
984                         break;
985
986                 ret = ops->vidioc_qbuf(file, fh, p);
987                 if (!ret)
988                         dbgbuf(cmd, vfd, p);
989                 break;
990         }
991         case VIDIOC_DQBUF:
992         {
993                 struct v4l2_buffer *p = arg;
994
995                 if (!ops->vidioc_dqbuf)
996                         break;
997                 ret = check_fmt(ops, p->type);
998                 if (ret)
999                         break;
1000
1001                 ret = ops->vidioc_dqbuf(file, fh, p);
1002                 if (!ret)
1003                         dbgbuf(cmd, vfd, p);
1004                 break;
1005         }
1006         case VIDIOC_OVERLAY:
1007         {
1008                 int *i = arg;
1009
1010                 if (!ops->vidioc_overlay)
1011                         break;
1012                 dbgarg(cmd, "value=%d\n", *i);
1013                 ret = ops->vidioc_overlay(file, fh, *i);
1014                 break;
1015         }
1016         case VIDIOC_G_FBUF:
1017         {
1018                 struct v4l2_framebuffer *p = arg;
1019
1020                 if (!ops->vidioc_g_fbuf)
1021                         break;
1022                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1023                 if (!ret) {
1024                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1025                                         p->capability, p->flags,
1026                                         (unsigned long)p->base);
1027                         v4l_print_pix_fmt(vfd, &p->fmt);
1028                 }
1029                 break;
1030         }
1031         case VIDIOC_S_FBUF:
1032         {
1033                 struct v4l2_framebuffer *p = arg;
1034
1035                 if (!ops->vidioc_s_fbuf)
1036                         break;
1037                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1038                         p->capability, p->flags, (unsigned long)p->base);
1039                 v4l_print_pix_fmt(vfd, &p->fmt);
1040                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1041                 break;
1042         }
1043         case VIDIOC_STREAMON:
1044         {
1045                 enum v4l2_buf_type i = *(int *)arg;
1046
1047                 if (!ops->vidioc_streamon)
1048                         break;
1049                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1050                 ret = ops->vidioc_streamon(file, fh, i);
1051                 break;
1052         }
1053         case VIDIOC_STREAMOFF:
1054         {
1055                 enum v4l2_buf_type i = *(int *)arg;
1056
1057                 if (!ops->vidioc_streamoff)
1058                         break;
1059                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1060                 ret = ops->vidioc_streamoff(file, fh, i);
1061                 break;
1062         }
1063         /* ---------- tv norms ---------- */
1064         case VIDIOC_ENUMSTD:
1065         {
1066                 struct v4l2_standard *p = arg;
1067                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1068                 unsigned int index = p->index, i, j = 0;
1069                 const char *descr = "";
1070
1071                 /* Return norm array in a canonical way */
1072                 for (i = 0; i <= index && id; i++) {
1073                         /* last std value in the standards array is 0, so this
1074                            while always ends there since (id & 0) == 0. */
1075                         while ((id & standards[j].std) != standards[j].std)
1076                                 j++;
1077                         curr_id = standards[j].std;
1078                         descr = standards[j].descr;
1079                         j++;
1080                         if (curr_id == 0)
1081                                 break;
1082                         if (curr_id != V4L2_STD_PAL &&
1083                             curr_id != V4L2_STD_SECAM &&
1084                             curr_id != V4L2_STD_NTSC)
1085                                 id &= ~curr_id;
1086                 }
1087                 if (i <= index)
1088                         return -EINVAL;
1089
1090                 v4l2_video_std_construct(p, curr_id, descr);
1091                 p->index = index;
1092
1093                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1094                                 "framelines=%d\n", p->index,
1095                                 (unsigned long long)p->id, p->name,
1096                                 p->frameperiod.numerator,
1097                                 p->frameperiod.denominator,
1098                                 p->framelines);
1099
1100                 ret = 0;
1101                 break;
1102         }
1103         case VIDIOC_G_STD:
1104         {
1105                 v4l2_std_id *id = arg;
1106
1107                 ret = 0;
1108                 /* Calls the specific handler */
1109                 if (ops->vidioc_g_std)
1110                         ret = ops->vidioc_g_std(file, fh, id);
1111                 else
1112                         *id = vfd->current_norm;
1113
1114                 if (!ret)
1115                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1116                 break;
1117         }
1118         case VIDIOC_S_STD:
1119         {
1120                 v4l2_std_id *id = arg, norm;
1121
1122                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1123
1124                 norm = (*id) & vfd->tvnorms;
1125                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1126                         break;
1127
1128                 /* Calls the specific handler */
1129                 if (ops->vidioc_s_std)
1130                         ret = ops->vidioc_s_std(file, fh, &norm);
1131                 else
1132                         ret = -EINVAL;
1133
1134                 /* Updates standard information */
1135                 if (ret >= 0)
1136                         vfd->current_norm = norm;
1137                 break;
1138         }
1139         case VIDIOC_QUERYSTD:
1140         {
1141                 v4l2_std_id *p = arg;
1142
1143                 if (!ops->vidioc_querystd)
1144                         break;
1145                 ret = ops->vidioc_querystd(file, fh, arg);
1146                 if (!ret)
1147                         dbgarg(cmd, "detected std=%08Lx\n",
1148                                                 (unsigned long long)*p);
1149                 break;
1150         }
1151         /* ------ input switching ---------- */
1152         /* FIXME: Inputs can be handled inside videodev2 */
1153         case VIDIOC_ENUMINPUT:
1154         {
1155                 struct v4l2_input *p = arg;
1156                 int i = p->index;
1157
1158                 if (!ops->vidioc_enum_input)
1159                         break;
1160                 memset(p, 0, sizeof(*p));
1161                 p->index = i;
1162
1163                 ret = ops->vidioc_enum_input(file, fh, p);
1164                 if (!ret)
1165                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1166                                 "audioset=%d, "
1167                                 "tuner=%d, std=%08Lx, status=%d\n",
1168                                 p->index, p->name, p->type, p->audioset,
1169                                 p->tuner,
1170                                 (unsigned long long)p->std,
1171                                 p->status);
1172                 break;
1173         }
1174         case VIDIOC_G_INPUT:
1175         {
1176                 unsigned int *i = arg;
1177
1178                 if (!ops->vidioc_g_input)
1179                         break;
1180                 ret = ops->vidioc_g_input(file, fh, i);
1181                 if (!ret)
1182                         dbgarg(cmd, "value=%d\n", *i);
1183                 break;
1184         }
1185         case VIDIOC_S_INPUT:
1186         {
1187                 unsigned int *i = arg;
1188
1189                 if (!ops->vidioc_s_input)
1190                         break;
1191                 dbgarg(cmd, "value=%d\n", *i);
1192                 ret = ops->vidioc_s_input(file, fh, *i);
1193                 break;
1194         }
1195
1196         /* ------ output switching ---------- */
1197         case VIDIOC_ENUMOUTPUT:
1198         {
1199                 struct v4l2_output *p = arg;
1200                 int i = p->index;
1201
1202                 if (!ops->vidioc_enum_output)
1203                         break;
1204                 memset(p, 0, sizeof(*p));
1205                 p->index = i;
1206
1207                 ret = ops->vidioc_enum_output(file, fh, p);
1208                 if (!ret)
1209                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1210                                 "audioset=0x%x, "
1211                                 "modulator=%d, std=0x%08Lx\n",
1212                                 p->index, p->name, p->type, p->audioset,
1213                                 p->modulator, (unsigned long long)p->std);
1214                 break;
1215         }
1216         case VIDIOC_G_OUTPUT:
1217         {
1218                 unsigned int *i = arg;
1219
1220                 if (!ops->vidioc_g_output)
1221                         break;
1222                 ret = ops->vidioc_g_output(file, fh, i);
1223                 if (!ret)
1224                         dbgarg(cmd, "value=%d\n", *i);
1225                 break;
1226         }
1227         case VIDIOC_S_OUTPUT:
1228         {
1229                 unsigned int *i = arg;
1230
1231                 if (!ops->vidioc_s_output)
1232                         break;
1233                 dbgarg(cmd, "value=%d\n", *i);
1234                 ret = ops->vidioc_s_output(file, fh, *i);
1235                 break;
1236         }
1237
1238         /* --- controls ---------------------------------------------- */
1239         case VIDIOC_QUERYCTRL:
1240         {
1241                 struct v4l2_queryctrl *p = arg;
1242
1243                 if (!ops->vidioc_queryctrl)
1244                         break;
1245                 ret = ops->vidioc_queryctrl(file, fh, p);
1246                 if (!ret)
1247                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1248                                         "step=%d, default=%d, flags=0x%08x\n",
1249                                         p->id, p->type, p->name,
1250                                         p->minimum, p->maximum,
1251                                         p->step, p->default_value, p->flags);
1252                 else
1253                         dbgarg(cmd, "id=0x%x\n", p->id);
1254                 break;
1255         }
1256         case VIDIOC_G_CTRL:
1257         {
1258                 struct v4l2_control *p = arg;
1259
1260                 if (ops->vidioc_g_ctrl)
1261                         ret = ops->vidioc_g_ctrl(file, fh, p);
1262                 else if (ops->vidioc_g_ext_ctrls) {
1263                         struct v4l2_ext_controls ctrls;
1264                         struct v4l2_ext_control ctrl;
1265
1266                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1267                         ctrls.count = 1;
1268                         ctrls.controls = &ctrl;
1269                         ctrl.id = p->id;
1270                         ctrl.value = p->value;
1271                         if (check_ext_ctrls(&ctrls, 1)) {
1272                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1273                                 if (ret == 0)
1274                                         p->value = ctrl.value;
1275                         }
1276                 } else
1277                         break;
1278                 if (!ret)
1279                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1280                 else
1281                         dbgarg(cmd, "id=0x%x\n", p->id);
1282                 break;
1283         }
1284         case VIDIOC_S_CTRL:
1285         {
1286                 struct v4l2_control *p = arg;
1287                 struct v4l2_ext_controls ctrls;
1288                 struct v4l2_ext_control ctrl;
1289
1290                 if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1291                         break;
1292
1293                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1294
1295                 if (ops->vidioc_s_ctrl) {
1296                         ret = ops->vidioc_s_ctrl(file, fh, p);
1297                         break;
1298                 }
1299                 if (!ops->vidioc_s_ext_ctrls)
1300                         break;
1301
1302                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1303                 ctrls.count = 1;
1304                 ctrls.controls = &ctrl;
1305                 ctrl.id = p->id;
1306                 ctrl.value = p->value;
1307                 if (check_ext_ctrls(&ctrls, 1))
1308                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1309                 break;
1310         }
1311         case VIDIOC_G_EXT_CTRLS:
1312         {
1313                 struct v4l2_ext_controls *p = arg;
1314
1315                 p->error_idx = p->count;
1316                 if (!ops->vidioc_g_ext_ctrls)
1317                         break;
1318                 if (check_ext_ctrls(p, 0))
1319                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1320                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1321                 break;
1322         }
1323         case VIDIOC_S_EXT_CTRLS:
1324         {
1325                 struct v4l2_ext_controls *p = arg;
1326
1327                 p->error_idx = p->count;
1328                 if (!ops->vidioc_s_ext_ctrls)
1329                         break;
1330                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1331                 if (check_ext_ctrls(p, 0))
1332                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1333                 break;
1334         }
1335         case VIDIOC_TRY_EXT_CTRLS:
1336         {
1337                 struct v4l2_ext_controls *p = arg;
1338
1339                 p->error_idx = p->count;
1340                 if (!ops->vidioc_try_ext_ctrls)
1341                         break;
1342                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1343                 if (check_ext_ctrls(p, 0))
1344                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1345                 break;
1346         }
1347         case VIDIOC_QUERYMENU:
1348         {
1349                 struct v4l2_querymenu *p = arg;
1350
1351                 if (!ops->vidioc_querymenu)
1352                         break;
1353                 ret = ops->vidioc_querymenu(file, fh, p);
1354                 if (!ret)
1355                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1356                                 p->id, p->index, p->name);
1357                 else
1358                         dbgarg(cmd, "id=0x%x, index=%d\n",
1359                                 p->id, p->index);
1360                 break;
1361         }
1362         /* --- audio ---------------------------------------------- */
1363         case VIDIOC_ENUMAUDIO:
1364         {
1365                 struct v4l2_audio *p = arg;
1366
1367                 if (!ops->vidioc_enumaudio)
1368                         break;
1369                 ret = ops->vidioc_enumaudio(file, fh, p);
1370                 if (!ret)
1371                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1372                                         "mode=0x%x\n", p->index, p->name,
1373                                         p->capability, p->mode);
1374                 else
1375                         dbgarg(cmd, "index=%d\n", p->index);
1376                 break;
1377         }
1378         case VIDIOC_G_AUDIO:
1379         {
1380                 struct v4l2_audio *p = arg;
1381                 __u32 index = p->index;
1382
1383                 if (!ops->vidioc_g_audio)
1384                         break;
1385
1386                 memset(p, 0, sizeof(*p));
1387                 p->index = index;
1388                 ret = ops->vidioc_g_audio(file, fh, p);
1389                 if (!ret)
1390                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1391                                         "mode=0x%x\n", p->index,
1392                                         p->name, p->capability, p->mode);
1393                 else
1394                         dbgarg(cmd, "index=%d\n", p->index);
1395                 break;
1396         }
1397         case VIDIOC_S_AUDIO:
1398         {
1399                 struct v4l2_audio *p = arg;
1400
1401                 if (!ops->vidioc_s_audio)
1402                         break;
1403                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1404                                         "mode=0x%x\n", p->index, p->name,
1405                                         p->capability, p->mode);
1406                 ret = ops->vidioc_s_audio(file, fh, p);
1407                 break;
1408         }
1409         case VIDIOC_ENUMAUDOUT:
1410         {
1411                 struct v4l2_audioout *p = arg;
1412
1413                 if (!ops->vidioc_enumaudout)
1414                         break;
1415                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1416                 ret = ops->vidioc_enumaudout(file, fh, p);
1417                 if (!ret)
1418                         dbgarg2("index=%d, name=%s, capability=%d, "
1419                                         "mode=%d\n", p->index, p->name,
1420                                         p->capability, p->mode);
1421                 break;
1422         }
1423         case VIDIOC_G_AUDOUT:
1424         {
1425                 struct v4l2_audioout *p = arg;
1426
1427                 if (!ops->vidioc_g_audout)
1428                         break;
1429                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1430                 ret = ops->vidioc_g_audout(file, fh, p);
1431                 if (!ret)
1432                         dbgarg2("index=%d, name=%s, capability=%d, "
1433                                         "mode=%d\n", p->index, p->name,
1434                                         p->capability, p->mode);
1435                 break;
1436         }
1437         case VIDIOC_S_AUDOUT:
1438         {
1439                 struct v4l2_audioout *p = arg;
1440
1441                 if (!ops->vidioc_s_audout)
1442                         break;
1443                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1444                                         "mode=%d\n", p->index, p->name,
1445                                         p->capability, p->mode);
1446
1447                 ret = ops->vidioc_s_audout(file, fh, p);
1448                 break;
1449         }
1450         case VIDIOC_G_MODULATOR:
1451         {
1452                 struct v4l2_modulator *p = arg;
1453
1454                 if (!ops->vidioc_g_modulator)
1455                         break;
1456                 ret = ops->vidioc_g_modulator(file, fh, p);
1457                 if (!ret)
1458                         dbgarg(cmd, "index=%d, name=%s, "
1459                                         "capability=%d, rangelow=%d,"
1460                                         " rangehigh=%d, txsubchans=%d\n",
1461                                         p->index, p->name, p->capability,
1462                                         p->rangelow, p->rangehigh,
1463                                         p->txsubchans);
1464                 break;
1465         }
1466         case VIDIOC_S_MODULATOR:
1467         {
1468                 struct v4l2_modulator *p = arg;
1469
1470                 if (!ops->vidioc_s_modulator)
1471                         break;
1472                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1473                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1474                                 p->index, p->name, p->capability, p->rangelow,
1475                                 p->rangehigh, p->txsubchans);
1476                         ret = ops->vidioc_s_modulator(file, fh, p);
1477                 break;
1478         }
1479         case VIDIOC_G_CROP:
1480         {
1481                 struct v4l2_crop *p = arg;
1482
1483                 if (!ops->vidioc_g_crop)
1484                         break;
1485                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1486                 ret = ops->vidioc_g_crop(file, fh, p);
1487                 if (!ret)
1488                         dbgrect(vfd, "", &p->c);
1489                 break;
1490         }
1491         case VIDIOC_S_CROP:
1492         {
1493                 struct v4l2_crop *p = arg;
1494
1495                 if (!ops->vidioc_s_crop)
1496                         break;
1497                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1498                 dbgrect(vfd, "", &p->c);
1499                 ret = ops->vidioc_s_crop(file, fh, p);
1500                 break;
1501         }
1502         case VIDIOC_CROPCAP:
1503         {
1504                 struct v4l2_cropcap *p = arg;
1505
1506                 /*FIXME: Should also show v4l2_fract pixelaspect */
1507                 if (!ops->vidioc_cropcap)
1508                         break;
1509                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1510                 ret = ops->vidioc_cropcap(file, fh, p);
1511                 if (!ret) {
1512                         dbgrect(vfd, "bounds ", &p->bounds);
1513                         dbgrect(vfd, "defrect ", &p->defrect);
1514                 }
1515                 break;
1516         }
1517         case VIDIOC_G_JPEGCOMP:
1518         {
1519                 struct v4l2_jpegcompression *p = arg;
1520
1521                 if (!ops->vidioc_g_jpegcomp)
1522                         break;
1523                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1524                 if (!ret)
1525                         dbgarg(cmd, "quality=%d, APPn=%d, "
1526                                         "APP_len=%d, COM_len=%d, "
1527                                         "jpeg_markers=%d\n",
1528                                         p->quality, p->APPn, p->APP_len,
1529                                         p->COM_len, p->jpeg_markers);
1530                 break;
1531         }
1532         case VIDIOC_S_JPEGCOMP:
1533         {
1534                 struct v4l2_jpegcompression *p = arg;
1535
1536                 if (!ops->vidioc_g_jpegcomp)
1537                         break;
1538                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1539                                         "COM_len=%d, jpeg_markers=%d\n",
1540                                         p->quality, p->APPn, p->APP_len,
1541                                         p->COM_len, p->jpeg_markers);
1542                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1543                 break;
1544         }
1545         case VIDIOC_G_ENC_INDEX:
1546         {
1547                 struct v4l2_enc_idx *p = arg;
1548
1549                 if (!ops->vidioc_g_enc_index)
1550                         break;
1551                 ret = ops->vidioc_g_enc_index(file, fh, p);
1552                 if (!ret)
1553                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1554                                         p->entries, p->entries_cap);
1555                 break;
1556         }
1557         case VIDIOC_ENCODER_CMD:
1558         {
1559                 struct v4l2_encoder_cmd *p = arg;
1560
1561                 if (!ops->vidioc_encoder_cmd)
1562                         break;
1563                 memset(&p->raw, 0, sizeof(p->raw));
1564                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1565                 if (!ret)
1566                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1567                 break;
1568         }
1569         case VIDIOC_TRY_ENCODER_CMD:
1570         {
1571                 struct v4l2_encoder_cmd *p = arg;
1572
1573                 if (!ops->vidioc_try_encoder_cmd)
1574                         break;
1575                 memset(&p->raw, 0, sizeof(p->raw));
1576                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1577                 if (!ret)
1578                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1579                 break;
1580         }
1581         case VIDIOC_G_PARM:
1582         {
1583                 struct v4l2_streamparm *p = arg;
1584                 __u32 type = p->type;
1585
1586                 memset(p, 0, sizeof(*p));
1587                 p->type = type;
1588
1589                 if (ops->vidioc_g_parm) {
1590                         ret = ops->vidioc_g_parm(file, fh, p);
1591                 } else {
1592                         struct v4l2_standard s;
1593
1594                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1595                                 return -EINVAL;
1596
1597                         v4l2_video_std_construct(&s, vfd->current_norm,
1598                                                  v4l2_norm_to_name(vfd->current_norm));
1599
1600                         p->parm.capture.timeperframe = s.frameperiod;
1601                         ret = 0;
1602                 }
1603
1604                 dbgarg(cmd, "type=%d\n", p->type);
1605                 break;
1606         }
1607         case VIDIOC_S_PARM:
1608         {
1609                 struct v4l2_streamparm *p = arg;
1610
1611                 if (!ops->vidioc_s_parm)
1612                         break;
1613                 dbgarg(cmd, "type=%d\n", p->type);
1614                 ret = ops->vidioc_s_parm(file, fh, p);
1615                 break;
1616         }
1617         case VIDIOC_G_TUNER:
1618         {
1619                 struct v4l2_tuner *p = arg;
1620                 __u32 index = p->index;
1621
1622                 if (!ops->vidioc_g_tuner)
1623                         break;
1624
1625                 memset(p, 0, sizeof(*p));
1626                 p->index = index;
1627
1628                 ret = ops->vidioc_g_tuner(file, fh, p);
1629                 if (!ret)
1630                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1631                                         "capability=0x%x, rangelow=%d, "
1632                                         "rangehigh=%d, signal=%d, afc=%d, "
1633                                         "rxsubchans=0x%x, audmode=%d\n",
1634                                         p->index, p->name, p->type,
1635                                         p->capability, p->rangelow,
1636                                         p->rangehigh, p->signal, p->afc,
1637                                         p->rxsubchans, p->audmode);
1638                 break;
1639         }
1640         case VIDIOC_S_TUNER:
1641         {
1642                 struct v4l2_tuner *p = arg;
1643
1644                 if (!ops->vidioc_s_tuner)
1645                         break;
1646                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1647                                 "capability=0x%x, rangelow=%d, "
1648                                 "rangehigh=%d, signal=%d, afc=%d, "
1649                                 "rxsubchans=0x%x, audmode=%d\n",
1650                                 p->index, p->name, p->type,
1651                                 p->capability, p->rangelow,
1652                                 p->rangehigh, p->signal, p->afc,
1653                                 p->rxsubchans, p->audmode);
1654                 ret = ops->vidioc_s_tuner(file, fh, p);
1655                 break;
1656         }
1657         case VIDIOC_G_FREQUENCY:
1658         {
1659                 struct v4l2_frequency *p = arg;
1660
1661                 if (!ops->vidioc_g_frequency)
1662                         break;
1663
1664                 memset(p->reserved, 0, sizeof(p->reserved));
1665
1666                 ret = ops->vidioc_g_frequency(file, fh, p);
1667                 if (!ret)
1668                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1669                                         p->tuner, p->type, p->frequency);
1670                 break;
1671         }
1672         case VIDIOC_S_FREQUENCY:
1673         {
1674                 struct v4l2_frequency *p = arg;
1675
1676                 if (!ops->vidioc_s_frequency)
1677                         break;
1678                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1679                                 p->tuner, p->type, p->frequency);
1680                 ret = ops->vidioc_s_frequency(file, fh, p);
1681                 break;
1682         }
1683         case VIDIOC_G_SLICED_VBI_CAP:
1684         {
1685                 struct v4l2_sliced_vbi_cap *p = arg;
1686                 __u32 type = p->type;
1687
1688                 if (!ops->vidioc_g_sliced_vbi_cap)
1689                         break;
1690                 memset(p, 0, sizeof(*p));
1691                 p->type = type;
1692                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1693                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1694                 if (!ret)
1695                         dbgarg2("service_set=%d\n", p->service_set);
1696                 break;
1697         }
1698         case VIDIOC_LOG_STATUS:
1699         {
1700                 if (!ops->vidioc_log_status)
1701                         break;
1702                 ret = ops->vidioc_log_status(file, fh);
1703                 break;
1704         }
1705 #ifdef CONFIG_VIDEO_ADV_DEBUG
1706         case VIDIOC_DBG_G_REGISTER:
1707         {
1708                 struct v4l2_register *p = arg;
1709
1710                 if (!capable(CAP_SYS_ADMIN))
1711                         ret = -EPERM;
1712                 else if (ops->vidioc_g_register)
1713                         ret = ops->vidioc_g_register(file, fh, p);
1714                 break;
1715         }
1716         case VIDIOC_DBG_S_REGISTER:
1717         {
1718                 struct v4l2_register *p = arg;
1719
1720                 if (!capable(CAP_SYS_ADMIN))
1721                         ret = -EPERM;
1722                 else if (ops->vidioc_s_register)
1723                         ret = ops->vidioc_s_register(file, fh, p);
1724                 break;
1725         }
1726 #endif
1727         case VIDIOC_G_CHIP_IDENT:
1728         {
1729                 struct v4l2_chip_ident *p = arg;
1730
1731                 if (!ops->vidioc_g_chip_ident)
1732                         break;
1733                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1734                 if (!ret)
1735                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1736                 break;
1737         }
1738         case VIDIOC_S_HW_FREQ_SEEK:
1739         {
1740                 struct v4l2_hw_freq_seek *p = arg;
1741
1742                 if (!ops->vidioc_s_hw_freq_seek)
1743                         break;
1744                 dbgarg(cmd,
1745                         "tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
1746                         p->tuner, p->type, p->seek_upward, p->wrap_around);
1747                 ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1748                 break;
1749         }
1750         case VIDIOC_ENUM_FRAMESIZES:
1751         {
1752                 struct v4l2_frmsizeenum *p = arg;
1753
1754                 if (!ops->vidioc_enum_framesizes)
1755                         break;
1756
1757                 memset(p, 0, sizeof(*p));
1758
1759                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1760                 dbgarg(cmd,
1761                         "index=%d, pixelformat=%d, type=%d ",
1762                         p->index, p->pixel_format, p->type);
1763                 switch (p->type) {
1764                 case V4L2_FRMSIZE_TYPE_DISCRETE:
1765                         dbgarg2("width = %d, height=%d\n",
1766                                 p->discrete.width, p->discrete.height);
1767                         break;
1768                 case V4L2_FRMSIZE_TYPE_STEPWISE:
1769                         dbgarg2("min %dx%d, max %dx%d, step %dx%d\n",
1770                                 p->stepwise.min_width,  p->stepwise.min_height,
1771                                 p->stepwise.step_width, p->stepwise.step_height,
1772                                 p->stepwise.max_width,  p->stepwise.max_height);
1773                         break;
1774                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1775                         dbgarg2("continuous\n");
1776                         break;
1777                 default:
1778                         dbgarg2("- Unknown type!\n");
1779                 }
1780
1781                 break;
1782         }
1783         case VIDIOC_ENUM_FRAMEINTERVALS:
1784         {
1785                 struct v4l2_frmivalenum *p = arg;
1786
1787                 if (!ops->vidioc_enum_frameintervals)
1788                         break;
1789
1790                 memset(p, 0, sizeof(*p));
1791
1792                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
1793                 dbgarg(cmd,
1794                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
1795                         p->index, p->pixel_format,
1796                         p->width, p->height, p->type);
1797                 switch (p->type) {
1798                 case V4L2_FRMIVAL_TYPE_DISCRETE:
1799                         dbgarg2("fps=%d/%d\n",
1800                                 p->discrete.numerator,
1801                                 p->discrete.denominator);
1802                         break;
1803                 case V4L2_FRMIVAL_TYPE_STEPWISE:
1804                         dbgarg2("min=%d, max=%d, step=%d\n",
1805                                 p->stepwise.min, p->stepwise.max,
1806                                 p->stepwise.step);
1807                         break;
1808                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1809                         dbgarg2("continuous\n");
1810                         break;
1811                 default:
1812                         dbgarg2("- Unknown type!\n");
1813                 }
1814                 break;
1815         }
1816
1817         default:
1818         {
1819                 if (!ops->vidioc_default)
1820                         break;
1821                 ret = ops->vidioc_default(file, fh, cmd, arg);
1822                 break;
1823         }
1824         } /* switch */
1825
1826         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1827                 if (ret < 0) {
1828                         v4l_print_ioctl(vfd->name, cmd);
1829                         printk(KERN_CONT " error %d\n", ret);
1830                 }
1831         }
1832
1833         return ret;
1834 }
1835
1836 int __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         int     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         switch (_IOC_DIR(cmd)) {
1855         case _IOC_NONE:
1856                 parg = NULL;
1857                 break;
1858         case _IOC_READ:
1859         case _IOC_WRITE:
1860         case (_IOC_WRITE | _IOC_READ):
1861                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1862                         parg = sbuf;
1863                 } else {
1864                         /* too big to allocate from stack */
1865                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
1866                         if (NULL == mbuf)
1867                                 return -ENOMEM;
1868                         parg = mbuf;
1869                 }
1870
1871                 err = -EFAULT;
1872                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1873                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1874                                 goto out;
1875                 break;
1876         }
1877
1878         if (is_ext_ctrl) {
1879                 struct v4l2_ext_controls *p = parg;
1880
1881                 /* In case of an error, tell the caller that it wasn't
1882                    a specific control that caused it. */
1883                 p->error_idx = p->count;
1884                 user_ptr = (void __user *)p->controls;
1885                 if (p->count) {
1886                         ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
1887                         /* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
1888                         mbuf = kmalloc(ctrls_size, GFP_KERNEL);
1889                         err = -ENOMEM;
1890                         if (NULL == mbuf)
1891                                 goto out_ext_ctrl;
1892                         err = -EFAULT;
1893                         if (copy_from_user(mbuf, user_ptr, ctrls_size))
1894                                 goto out_ext_ctrl;
1895                         p->controls = mbuf;
1896                 }
1897         }
1898
1899         /* Handles IOCTL */
1900         err = __video_do_ioctl(file, cmd, parg);
1901         if (err == -ENOIOCTLCMD)
1902                 err = -EINVAL;
1903         if (is_ext_ctrl) {
1904                 struct v4l2_ext_controls *p = parg;
1905
1906                 p->controls = (void *)user_ptr;
1907                 if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
1908                         err = -EFAULT;
1909                 goto out_ext_ctrl;
1910         }
1911         if (err < 0)
1912                 goto out;
1913
1914 out_ext_ctrl:
1915         /*  Copy results into user buffer  */
1916         switch (_IOC_DIR(cmd)) {
1917         case _IOC_READ:
1918         case (_IOC_WRITE | _IOC_READ):
1919                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1920                         err = -EFAULT;
1921                 break;
1922         }
1923
1924 out:
1925         kfree(mbuf);
1926         return err;
1927 }
1928 EXPORT_SYMBOL(__video_ioctl2);
1929
1930 int video_ioctl2(struct inode *inode, struct file *file,
1931                unsigned int cmd, unsigned long arg)
1932 {
1933         return __video_ioctl2(file, cmd, arg);
1934 }
1935 EXPORT_SYMBOL(video_ioctl2);