V4L/DVB (4065): Several improvements at videodev.c
[linux-2.6.git] / drivers / media / video / videodev.c
1 /*
2  * Video capture interface for Linux version 2
3  *
4  *      A generic video device interface for the LINUX operating system
5  *      using a set of device structures/vectors for low level operations.
6  *
7  *      This program is free software; you can redistribute it and/or
8  *      modify it under the terms of the GNU General Public License
9  *      as published by the Free Software Foundation; either version
10  *      2 of the License, or (at your option) any later version.
11  *
12  * Authors:     Alan Cox, <alan@redhat.com> (version 1)
13  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
14  *
15  * Fixes:       20000516  Claudio Matsuoka <claudio@conectiva.com>
16  *              - Added procfs support
17  */
18
19 #define dbgarg(cmd, fmt, arg...) \
20                 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)                  \
21                         printk (KERN_DEBUG "%s: ",  vfd->name);         \
22                         v4l_printk_ioctl(cmd);                          \
23                         printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg);
24
25 #define dbgarg2(fmt, arg...) \
26                 if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)                  \
27                         printk (KERN_DEBUG "%s: " fmt, vfd->name, ## arg);
28
29 #include <linux/module.h>
30 #include <linux/types.h>
31 #include <linux/kernel.h>
32 #include <linux/sched.h>
33 #include <linux/smp_lock.h>
34 #include <linux/mm.h>
35 #include <linux/string.h>
36 #include <linux/errno.h>
37 #include <linux/init.h>
38 #include <linux/kmod.h>
39 #include <linux/slab.h>
40 #include <linux/devfs_fs_kernel.h>
41 #include <asm/uaccess.h>
42 #include <asm/system.h>
43
44 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
45 #include <linux/videodev2.h>
46
47 #ifdef CONFIG_VIDEO_V4L1
48 #include <linux/videodev.h>
49 #endif
50 #include <media/v4l2-common.h>
51
52 #define VIDEO_NUM_DEVICES       256
53 #define VIDEO_NAME              "video4linux"
54
55 /*
56  *      sysfs stuff
57  */
58
59 static ssize_t show_name(struct class_device *cd, char *buf)
60 {
61         struct video_device *vfd = container_of(cd, struct video_device,
62                                                                 class_dev);
63         return sprintf(buf,"%.*s\n",(int)sizeof(vfd->name),vfd->name);
64 }
65
66 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
67
68 struct video_device *video_device_alloc(void)
69 {
70         struct video_device *vfd;
71
72         vfd = kzalloc(sizeof(*vfd),GFP_KERNEL);
73         return vfd;
74 }
75
76 void video_device_release(struct video_device *vfd)
77 {
78         kfree(vfd);
79 }
80
81 static void video_release(struct class_device *cd)
82 {
83         struct video_device *vfd = container_of(cd, struct video_device,
84                                                                 class_dev);
85
86 #if 1
87         /* needed until all drivers are fixed */
88         if (!vfd->release)
89                 return;
90 #endif
91         vfd->release(vfd);
92 }
93
94 static struct class video_class = {
95         .name    = VIDEO_NAME,
96         .release = video_release,
97 };
98
99 /*
100  *      Active devices
101  */
102
103 static struct video_device *video_device[VIDEO_NUM_DEVICES];
104 static DEFINE_MUTEX(videodev_lock);
105
106 struct video_device* video_devdata(struct file *file)
107 {
108         return video_device[iminor(file->f_dentry->d_inode)];
109 }
110
111 /*
112  *      Open a video device - FIXME: Obsoleted
113  */
114 static int video_open(struct inode *inode, struct file *file)
115 {
116         unsigned int minor = iminor(inode);
117         int err = 0;
118         struct video_device *vfl;
119         const struct file_operations *old_fops;
120
121         if(minor>=VIDEO_NUM_DEVICES)
122                 return -ENODEV;
123         mutex_lock(&videodev_lock);
124         vfl=video_device[minor];
125         if(vfl==NULL) {
126                 mutex_unlock(&videodev_lock);
127                 request_module("char-major-%d-%d", VIDEO_MAJOR, minor);
128                 mutex_lock(&videodev_lock);
129                 vfl=video_device[minor];
130                 if (vfl==NULL) {
131                         mutex_unlock(&videodev_lock);
132                         return -ENODEV;
133                 }
134         }
135         old_fops = file->f_op;
136         file->f_op = fops_get(vfl->fops);
137         if(file->f_op->open)
138                 err = file->f_op->open(inode,file);
139         if (err) {
140                 fops_put(file->f_op);
141                 file->f_op = fops_get(old_fops);
142         }
143         fops_put(old_fops);
144         mutex_unlock(&videodev_lock);
145         return err;
146 }
147
148 /*
149  * helper function -- handles userspace copying for ioctl arguments
150  */
151
152 #ifdef __OLD_VIDIOC_
153 static unsigned int
154 video_fix_command(unsigned int cmd)
155 {
156         switch (cmd) {
157         case VIDIOC_OVERLAY_OLD:
158                 cmd = VIDIOC_OVERLAY;
159                 break;
160         case VIDIOC_S_PARM_OLD:
161                 cmd = VIDIOC_S_PARM;
162                 break;
163         case VIDIOC_S_CTRL_OLD:
164                 cmd = VIDIOC_S_CTRL;
165                 break;
166         case VIDIOC_G_AUDIO_OLD:
167                 cmd = VIDIOC_G_AUDIO;
168                 break;
169         case VIDIOC_G_AUDOUT_OLD:
170                 cmd = VIDIOC_G_AUDOUT;
171                 break;
172         case VIDIOC_CROPCAP_OLD:
173                 cmd = VIDIOC_CROPCAP;
174                 break;
175         }
176         return cmd;
177 }
178 #endif
179
180 /*
181  * Obsolete usercopy function - Should be removed soon
182  */
183 int
184 video_usercopy(struct inode *inode, struct file *file,
185                unsigned int cmd, unsigned long arg,
186                int (*func)(struct inode *inode, struct file *file,
187                            unsigned int cmd, void *arg))
188 {
189         char    sbuf[128];
190         void    *mbuf = NULL;
191         void    *parg = NULL;
192         int     err  = -EINVAL;
193
194 #ifdef __OLD_VIDIOC_
195         cmd = video_fix_command(cmd);
196 #endif
197
198         /*  Copy arguments into temp kernel buffer  */
199         switch (_IOC_DIR(cmd)) {
200         case _IOC_NONE:
201                 parg = NULL;
202                 break;
203         case _IOC_READ:
204         case _IOC_WRITE:
205         case (_IOC_WRITE | _IOC_READ):
206                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
207                         parg = sbuf;
208                 } else {
209                         /* too big to allocate from stack */
210                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
211                         if (NULL == mbuf)
212                                 return -ENOMEM;
213                         parg = mbuf;
214                 }
215
216                 err = -EFAULT;
217                 if (_IOC_DIR(cmd) & _IOC_WRITE)
218                         if (copy_from_user(parg, (void __user *)arg,
219                                                         _IOC_SIZE(cmd)))
220                                 goto out;
221                 break;
222         }
223
224         /* call driver */
225         err = func(inode, file, cmd, parg);
226         if (err == -ENOIOCTLCMD)
227                 err = -EINVAL;
228         if (err < 0)
229                 goto out;
230
231         /*  Copy results into user buffer  */
232         switch (_IOC_DIR(cmd))
233         {
234         case _IOC_READ:
235         case (_IOC_WRITE | _IOC_READ):
236                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
237                         err = -EFAULT;
238                 break;
239         }
240
241 out:
242         kfree(mbuf);
243         return err;
244 }
245
246 /*
247  * open/release helper functions -- handle exclusive opens
248  * Should be removed soon
249  */
250 int video_exclusive_open(struct inode *inode, struct file *file)
251 {
252         struct  video_device *vfl = video_devdata(file);
253         int retval = 0;
254
255         mutex_lock(&vfl->lock);
256         if (vfl->users) {
257                 retval = -EBUSY;
258         } else {
259                 vfl->users++;
260         }
261         mutex_unlock(&vfl->lock);
262         return retval;
263 }
264
265 int video_exclusive_release(struct inode *inode, struct file *file)
266 {
267         struct  video_device *vfl = video_devdata(file);
268
269         vfl->users--;
270         return 0;
271 }
272
273 static char *v4l2_memory_names[] = {
274         [V4L2_MEMORY_MMAP]    = "mmap",
275         [V4L2_MEMORY_USERPTR] = "userptr",
276         [V4L2_MEMORY_OVERLAY] = "overlay",
277 };
278
279
280 /* FIXME: Those stuff are replicated also on v4l2-common.c */
281 static char *v4l2_type_names_FIXME[] = {
282         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "video-cap",
283         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "video-over",
284         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "video-out",
285         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
286         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
287         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
288         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
289         [V4L2_BUF_TYPE_PRIVATE]            = "private",
290 };
291
292 static char *v4l2_field_names_FIXME[] = {
293         [V4L2_FIELD_ANY]        = "any",
294         [V4L2_FIELD_NONE]       = "none",
295         [V4L2_FIELD_TOP]        = "top",
296         [V4L2_FIELD_BOTTOM]     = "bottom",
297         [V4L2_FIELD_INTERLACED] = "interlaced",
298         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
299         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
300         [V4L2_FIELD_ALTERNATE]  = "alternate",
301 };
302
303 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
304
305 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
306                                         struct v4l2_buffer *p)
307 {
308         struct v4l2_timecode *tc=&p->timecode;
309
310         dbgarg (cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
311                 "bytesused=%d, flags=0x%08d, "
312                 "field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx\n",
313                         (p->timestamp.tv_sec/3600),
314                         (int)(p->timestamp.tv_sec/60)%60,
315                         (int)(p->timestamp.tv_sec%60),
316                         p->timestamp.tv_usec,
317                         p->index,
318                         prt_names(p->type,v4l2_type_names_FIXME),
319                         p->bytesused,p->flags,
320                         p->field,p->sequence,
321                         prt_names(p->memory,v4l2_memory_names),
322                         p->m.userptr);
323         dbgarg2 ("timecode= %02d:%02d:%02d type=%d, "
324                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
325                         tc->hours,tc->minutes,tc->seconds,
326                         tc->type, tc->flags, tc->frames, (__u32) tc->userbits);
327 }
328
329 static inline void dbgrect(struct video_device *vfd, char *s,
330                                                         struct v4l2_rect *r)
331 {
332         dbgarg2 ("%sRect start at %dx%d, size= %dx%d\n", s, r->left, r->top,
333                                                 r->width, r->height);
334 };
335
336 static inline void v4l_print_pix_fmt (struct video_device *vfd,
337                                                 struct v4l2_pix_format *fmt)
338 {
339         dbgarg2 ("width=%d, height=%d, format=0x%08x, field=%s, "
340                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
341                 fmt->width,fmt->height,fmt->pixelformat,
342                 prt_names(fmt->field,v4l2_field_names_FIXME),
343                 fmt->bytesperline,fmt->sizeimage,fmt->colorspace);
344 };
345
346
347 static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
348 {
349         switch (type) {
350         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
351                 if (vfd->vidioc_try_fmt_cap)
352                         return (0);
353                 break;
354         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
355                 if (vfd->vidioc_try_fmt_overlay)
356                         return (0);
357                 break;
358         case V4L2_BUF_TYPE_VBI_CAPTURE:
359                 if (vfd->vidioc_try_fmt_vbi)
360                         return (0);
361                 break;
362         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
363                 if (vfd->vidioc_try_fmt_vbi_output)
364                         return (0);
365                 break;
366         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
367                 if (vfd->vidioc_try_fmt_vbi_capture)
368                         return (0);
369                 break;
370         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
371                 if (vfd->vidioc_try_fmt_video_output)
372                         return (0);
373                 break;
374         case V4L2_BUF_TYPE_VBI_OUTPUT:
375                 if (vfd->vidioc_try_fmt_vbi_output)
376                         return (0);
377                 break;
378         case V4L2_BUF_TYPE_PRIVATE:
379                 if (vfd->vidioc_try_fmt_type_private)
380                         return (0);
381                 break;
382         }
383         return (-EINVAL);
384 }
385
386 static int __video_do_ioctl(struct inode *inode, struct file *file,
387                 unsigned int cmd, void *arg)
388 {
389         struct video_device *vfd = video_devdata(file);
390         void                 *fh = file->private_data;
391         int                  ret = -EINVAL;
392
393         if ( (vfd->debug & V4L2_DEBUG_IOCTL) &&
394                                 !(vfd->debug | V4L2_DEBUG_IOCTL_ARG)) {
395                 v4l_print_ioctl(vfd->name, cmd);
396         }
397
398         switch(cmd) {
399         /* --- capabilities ------------------------------------------ */
400         case VIDIOC_QUERYCAP:
401         {
402                 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
403                 memset(cap, 0, sizeof(*cap));
404
405                 if (!vfd->vidioc_querycap)
406                         break;
407
408                 ret=vfd->vidioc_querycap(file, fh, cap);
409                 if (!ret)
410                         dbgarg (cmd, "driver=%s, card=%s, bus=%s, "
411                                         "version=0x%08x, "
412                                         "capabilities=0x%08x\n",
413                                         cap->driver,cap->card,cap->bus_info,
414                                         cap->version,
415                                         cap->capabilities);
416                 break;
417         }
418
419         /* --- priority ------------------------------------------ */
420         case VIDIOC_G_PRIORITY:
421         {
422                 enum v4l2_priority *p=arg;
423
424                 if (!vfd->vidioc_g_priority)
425                         break;
426                 ret=vfd->vidioc_g_priority(file, fh, p);
427                 if (!ret)
428                         dbgarg(cmd, "priority is %d\n", *p);
429                 break;
430         }
431         case VIDIOC_S_PRIORITY:
432         {
433                 enum v4l2_priority *p=arg;
434
435                 if (!vfd->vidioc_s_priority)
436                         break;
437                 dbgarg(cmd, "setting priority to %d\n", *p);
438                 ret=vfd->vidioc_s_priority(file, fh, *p);
439                 break;
440         }
441
442         /* --- capture ioctls ---------------------------------------- */
443         case VIDIOC_ENUM_FMT:
444         {
445                 struct v4l2_fmtdesc *f = arg;
446                 enum v4l2_buf_type type;
447                 unsigned int index;
448
449                 index = f->index;
450                 type  = f->type;
451                 memset(f,0,sizeof(*f));
452                 f->index = index;
453                 f->type  = type;
454
455                 switch (type) {
456                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
457                         if (vfd->vidioc_enum_fmt_cap)
458                                 ret=vfd->vidioc_enum_fmt_cap(file, fh, f);
459                         break;
460                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
461                         if (vfd->vidioc_enum_fmt_overlay)
462                                 ret=vfd->vidioc_enum_fmt_overlay(file, fh, f);
463                         break;
464                 case V4L2_BUF_TYPE_VBI_CAPTURE:
465                         if (vfd->vidioc_enum_fmt_vbi)
466                                 ret=vfd->vidioc_enum_fmt_vbi(file, fh, f);
467                         break;
468                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
469                         if (vfd->vidioc_enum_fmt_vbi_output)
470                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
471                                                                 fh, f);
472                         break;
473                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
474                         if (vfd->vidioc_enum_fmt_vbi_capture)
475                                 ret=vfd->vidioc_enum_fmt_vbi_capture(file,
476                                                                 fh, f);
477                         break;
478                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
479                         if (vfd->vidioc_enum_fmt_video_output)
480                                 ret=vfd->vidioc_enum_fmt_video_output(file,
481                                                                 fh, f);
482                         break;
483                 case V4L2_BUF_TYPE_VBI_OUTPUT:
484                         if (vfd->vidioc_enum_fmt_vbi_output)
485                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
486                                                                 fh, f);
487                         break;
488                 case V4L2_BUF_TYPE_PRIVATE:
489                         if (vfd->vidioc_enum_fmt_type_private)
490                                 ret=vfd->vidioc_enum_fmt_type_private(file,
491                                                                 fh, f);
492                         break;
493                 }
494                 if (!ret)
495                         dbgarg (cmd, "index=%d, type=%d, flags=%d, "
496                                         "description=%s,"
497                                         " pixelformat=0x%8x\n",
498                                         f->index, f->type, f->flags,
499                                         f->description,
500                                         f->pixelformat);
501
502                 break;
503         }
504         case VIDIOC_G_FMT:
505         {
506                 struct v4l2_format *f = (struct v4l2_format *)arg;
507                 enum v4l2_buf_type type=f->type;
508
509                 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
510                 f->type=type;
511
512                 /* FIXME: Should be one dump per type */
513                 dbgarg (cmd, "type=%s\n", prt_names(type,
514                                         v4l2_type_names_FIXME));
515
516                 switch (type) {
517                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
518                         if (vfd->vidioc_g_fmt_cap)
519                                 ret=vfd->vidioc_g_fmt_cap(file, fh, f);
520                         if (!ret)
521                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
522                         break;
523                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
524                         if (vfd->vidioc_g_fmt_overlay)
525                                 ret=vfd->vidioc_g_fmt_overlay(file, fh, f);
526                         break;
527                 case V4L2_BUF_TYPE_VBI_CAPTURE:
528                         if (vfd->vidioc_g_fmt_vbi)
529                                 ret=vfd->vidioc_g_fmt_vbi(file, fh, f);
530                         break;
531                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
532                         if (vfd->vidioc_g_fmt_vbi_output)
533                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
534                         break;
535                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
536                         if (vfd->vidioc_g_fmt_vbi_capture)
537                                 ret=vfd->vidioc_g_fmt_vbi_capture(file, fh, f);
538                         break;
539                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
540                         if (vfd->vidioc_g_fmt_video_output)
541                                 ret=vfd->vidioc_g_fmt_video_output(file,
542                                                                 fh, f);
543                         break;
544                 case V4L2_BUF_TYPE_VBI_OUTPUT:
545                         if (vfd->vidioc_g_fmt_vbi_output)
546                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
547                         break;
548                 case V4L2_BUF_TYPE_PRIVATE:
549                         if (vfd->vidioc_g_fmt_type_private)
550                                 ret=vfd->vidioc_g_fmt_type_private(file,
551                                                                 fh, f);
552                         break;
553                 }
554
555                 break;
556         }
557         case VIDIOC_S_FMT:
558         {
559                 struct v4l2_format *f = (struct v4l2_format *)arg;
560
561                 /* FIXME: Should be one dump per type */
562                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
563                                         v4l2_type_names_FIXME));
564
565                 switch (f->type) {
566                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
567                         v4l_print_pix_fmt(vfd,&f->fmt.pix);
568                         if (vfd->vidioc_s_fmt_cap)
569                                 ret=vfd->vidioc_s_fmt_cap(file, fh, f);
570                         break;
571                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
572                         if (vfd->vidioc_s_fmt_overlay)
573                                 ret=vfd->vidioc_s_fmt_overlay(file, fh, f);
574                         break;
575                 case V4L2_BUF_TYPE_VBI_CAPTURE:
576                         if (vfd->vidioc_s_fmt_vbi)
577                                 ret=vfd->vidioc_s_fmt_vbi(file, fh, f);
578                         break;
579                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
580                         if (vfd->vidioc_s_fmt_vbi_output)
581                                 ret=vfd->vidioc_s_fmt_vbi_output(file, fh, f);
582                         break;
583                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
584                         if (vfd->vidioc_s_fmt_vbi_capture)
585                                 ret=vfd->vidioc_s_fmt_vbi_capture(file, fh, f);
586                         break;
587                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
588                         if (vfd->vidioc_s_fmt_video_output)
589                                 ret=vfd->vidioc_s_fmt_video_output(file,
590                                                                 fh, f);
591                         break;
592                 case V4L2_BUF_TYPE_VBI_OUTPUT:
593                         if (vfd->vidioc_s_fmt_vbi_output)
594                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
595                                                                 fh, f);
596                         break;
597                 case V4L2_BUF_TYPE_PRIVATE:
598                         if (vfd->vidioc_s_fmt_type_private)
599                                 ret=vfd->vidioc_s_fmt_type_private(file,
600                                                                 fh, f);
601                         break;
602                 }
603                 break;
604         }
605         case VIDIOC_TRY_FMT:
606         {
607                 struct v4l2_format *f = (struct v4l2_format *)arg;
608
609                 /* FIXME: Should be one dump per type */
610                 dbgarg (cmd, "type=%s\n", prt_names(f->type,
611                                                 v4l2_type_names_FIXME));
612                 switch (f->type) {
613                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
614                         if (vfd->vidioc_try_fmt_cap)
615                                 ret=vfd->vidioc_try_fmt_cap(file, fh, f);
616                         if (!ret)
617                                 v4l_print_pix_fmt(vfd,&f->fmt.pix);
618                         break;
619                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
620                         if (vfd->vidioc_try_fmt_overlay)
621                                 ret=vfd->vidioc_try_fmt_overlay(file, fh, f);
622                         break;
623                 case V4L2_BUF_TYPE_VBI_CAPTURE:
624                         if (vfd->vidioc_try_fmt_vbi)
625                                 ret=vfd->vidioc_try_fmt_vbi(file, fh, f);
626                         break;
627                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
628                         if (vfd->vidioc_try_fmt_vbi_output)
629                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
630                                                                 fh, f);
631                         break;
632                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
633                         if (vfd->vidioc_try_fmt_vbi_capture)
634                                 ret=vfd->vidioc_try_fmt_vbi_capture(file,
635                                                                 fh, f);
636                         break;
637                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
638                         if (vfd->vidioc_try_fmt_video_output)
639                                 ret=vfd->vidioc_try_fmt_video_output(file,
640                                                                 fh, f);
641                         break;
642                 case V4L2_BUF_TYPE_VBI_OUTPUT:
643                         if (vfd->vidioc_try_fmt_vbi_output)
644                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
645                                                                 fh, f);
646                         break;
647                 case V4L2_BUF_TYPE_PRIVATE:
648                         if (vfd->vidioc_try_fmt_type_private)
649                                 ret=vfd->vidioc_try_fmt_type_private(file,
650                                                                 fh, f);
651                         break;
652                 }
653
654                 break;
655         }
656         /* FIXME: Those buf reqs could be handled here,
657            with some changes on videobuf to allow its header to be included at
658            videodev2.h or being merged at videodev2.
659          */
660         case VIDIOC_REQBUFS:
661         {
662                 struct v4l2_requestbuffers *p=arg;
663
664                 if (!vfd->vidioc_reqbufs)
665                         break;
666                 ret = check_fmt (vfd, p->type);
667                 if (ret)
668                         break;
669
670                 ret=vfd->vidioc_reqbufs(file, fh, p);
671                 dbgarg (cmd, "count=%d, type=%s, memory=%s\n",
672                                 p->count,
673                                 prt_names(p->type,v4l2_type_names_FIXME),
674                                 prt_names(p->memory,v4l2_memory_names));
675                 break;
676         }
677         case VIDIOC_QUERYBUF:
678         {
679                 struct v4l2_buffer *p=arg;
680
681                 if (!vfd->vidioc_querybuf)
682                         break;
683                 ret = check_fmt (vfd, p->type);
684                 if (ret)
685                         break;
686
687                 ret=vfd->vidioc_querybuf(file, fh, p);
688                 if (!ret)
689                         dbgbuf(cmd,vfd,p);
690                 break;
691         }
692         case VIDIOC_QBUF:
693         {
694                 struct v4l2_buffer *p=arg;
695
696                 if (!vfd->vidioc_qbuf)
697                         break;
698                 ret = check_fmt (vfd, p->type);
699                 if (ret)
700                         break;
701
702                 ret=vfd->vidioc_qbuf(file, fh, p);
703                 if (!ret)
704                         dbgbuf(cmd,vfd,p);
705                 break;
706         }
707         case VIDIOC_DQBUF:
708         {
709                 struct v4l2_buffer *p=arg;
710                 if (!vfd->vidioc_qbuf)
711                         break;
712                 ret = check_fmt (vfd, p->type);
713                 if (ret)
714                         break;
715
716                 ret=vfd->vidioc_qbuf(file, fh, p);
717                 if (!ret)
718                         dbgbuf(cmd,vfd,p);
719                 break;
720         }
721         case VIDIOC_OVERLAY:
722         {
723                 int *i = arg;
724
725                 if (!vfd->vidioc_overlay)
726                         break;
727                 dbgarg (cmd, "value=%d\n",*i);
728                 ret=vfd->vidioc_overlay(file, fh, *i);
729                 break;
730         }
731 #ifdef HAVE_V4L1
732         /* --- streaming capture ------------------------------------- */
733         case VIDIOCGMBUF:
734         {
735                 struct video_mbuf *p=arg;
736
737                 memset(&p,0,sizeof(p));
738
739                 if (!vfd->vidiocgmbuf)
740                         break;
741                 ret=vfd->vidiocgmbuf(file, fh, p);
742                 if (!ret)
743                         dbgarg (cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
744                                                 p->size, p->frames,
745                                                 (unsigned long)p->offsets);
746                 break;
747         }
748 #endif
749         case VIDIOC_G_FBUF:
750         {
751                 struct v4l2_framebuffer *p=arg;
752                 if (!vfd->vidioc_g_fbuf)
753                         break;
754                 ret=vfd->vidioc_g_fbuf(file, fh, arg);
755                 if (!ret) {
756                         dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
757                                         p->capability,p->flags,
758                                         (unsigned long)p->base);
759                         v4l_print_pix_fmt (vfd, &p->fmt);
760                 }
761                 break;
762         }
763         case VIDIOC_S_FBUF:
764         {
765                 struct v4l2_framebuffer *p=arg;
766                 if (!vfd->vidioc_s_fbuf)
767                         break;
768
769                 dbgarg (cmd, "capability=%d, flags=%d, base=0x%08lx\n",
770                                 p->capability,p->flags,(unsigned long)p->base);
771                 v4l_print_pix_fmt (vfd, &p->fmt);
772                 ret=vfd->vidioc_s_fbuf(file, fh, arg);
773
774                 break;
775         }
776         case VIDIOC_STREAMON:
777         {
778                 enum v4l2_buf_type i = *(int *)arg;
779                 if (!vfd->vidioc_streamon)
780                         break;
781                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
782                 ret=vfd->vidioc_streamon(file, fh,i);
783                 break;
784         }
785         case VIDIOC_STREAMOFF:
786         {
787                 enum v4l2_buf_type i = *(int *)arg;
788
789                 if (!vfd->vidioc_streamoff)
790                         break;
791                 dbgarg (cmd, "type=%s\n", prt_names(i,v4l2_type_names_FIXME));
792                 ret=vfd->vidioc_streamoff(file, fh, i);
793                 break;
794         }
795         /* ---------- tv norms ---------- */
796         case VIDIOC_ENUMSTD:
797         {
798                 struct v4l2_standard *p = arg;
799                 unsigned int index = p->index;
800
801                 if (!vfd->tvnormsize) {
802                         printk (KERN_WARNING "%s: no TV norms defined!\n",
803                                                 vfd->name);
804                         break;
805                 }
806
807                 if (index<=0 || index >= vfd->tvnormsize) {
808                         ret=-EINVAL;
809                         break;
810                 }
811                 v4l2_video_std_construct(p, vfd->tvnorms[p->index].id,
812                                          vfd->tvnorms[p->index].name);
813                 p->index = index;
814
815                 dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, "
816                                 "framelines=%d\n", p->index,
817                                 (unsigned long long)p->id, p->name,
818                                 p->frameperiod.numerator,
819                                 p->frameperiod.denominator,
820                                 p->framelines);
821
822                 ret=0;
823                 break;
824         }
825         case VIDIOC_G_STD:
826         {
827                 v4l2_std_id *id = arg;
828
829                 *id = vfd->current_norm;
830
831                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
832
833                 ret=0;
834                 break;
835         }
836         case VIDIOC_S_STD:
837         {
838                 v4l2_std_id *id = arg;
839                 unsigned int i;
840
841                 if (!vfd->tvnormsize) {
842                         printk (KERN_WARNING "%s: no TV norms defined!\n",
843                                                 vfd->name);
844                         break;
845                 }
846
847                 dbgarg (cmd, "value=%Lu\n", (long long unsigned) *id);
848
849                 /* First search for exact match */
850                 for (i = 0; i < vfd->tvnormsize; i++)
851                         if (*id == vfd->tvnorms[i].id)
852                                 break;
853                 /* Then for a generic video std that contains desired std */
854                 if (i == vfd->tvnormsize)
855                         for (i = 0; i < vfd->tvnormsize; i++)
856                                 if (*id & vfd->tvnorms[i].id)
857                                         break;
858                 if (i == vfd->tvnormsize) {
859                         break;
860                 }
861
862                 /* Calls the specific handler */
863                 if (vfd->vidioc_s_std)
864                         ret=vfd->vidioc_s_std(file, fh, i);
865                 else
866                         ret=-EINVAL;
867
868                 /* Updates standard information */
869                 if (!ret)
870                         vfd->current_norm=*id;
871
872                 break;
873         }
874         case VIDIOC_QUERYSTD:
875         {
876                 v4l2_std_id *p=arg;
877
878                 if (!vfd->vidioc_querystd)
879                         break;
880                 ret=vfd->vidioc_querystd(file, fh, arg);
881                 if (!ret)
882                         dbgarg (cmd, "detected std=%Lu\n",
883                                                 (unsigned long long)*p);
884                 break;
885         }
886         /* ------ input switching ---------- */
887         /* FIXME: Inputs can be handled inside videodev2 */
888         case VIDIOC_ENUMINPUT:
889         {
890                 struct v4l2_input *p=arg;
891                 int i=p->index;
892
893                 if (!vfd->vidioc_enum_input)
894                         break;
895                 memset(p, 0, sizeof(*p));
896                 p->index=i;
897
898                 ret=vfd->vidioc_enum_input(file, fh, p);
899                 if (!ret)
900                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
901                                         "audioset=%d, "
902                                         "tuner=%d, std=%Ld, status=%d\n",
903                                         p->index,p->name,p->type,p->audioset,
904                                         p->tuner,
905                                         (unsigned long long)p->std,
906                                         p->status);
907                 break;
908         }
909         case VIDIOC_G_INPUT:
910         {
911                 unsigned int *i = arg;
912
913                 if (!vfd->vidioc_g_input)
914                         break;
915                 ret=vfd->vidioc_g_input(file, fh, i);
916                 if (!ret)
917                         dbgarg (cmd, "value=%d\n",*i);
918                 break;
919         }
920         case VIDIOC_S_INPUT:
921         {
922                 unsigned int *i = arg;
923
924                 if (!vfd->vidioc_s_input)
925                         break;
926                 dbgarg (cmd, "value=%d\n",*i);
927                 ret=vfd->vidioc_s_input(file, fh, *i);
928                 break;
929         }
930
931         /* ------ output switching ---------- */
932         case VIDIOC_G_OUTPUT:
933         {
934                 unsigned int *i = arg;
935
936                 if (!vfd->vidioc_g_output)
937                         break;
938                 ret=vfd->vidioc_g_output(file, fh, i);
939                 if (!ret)
940                         dbgarg (cmd, "value=%d\n",*i);
941                 break;
942         }
943         case VIDIOC_S_OUTPUT:
944         {
945                 unsigned int *i = arg;
946
947                 if (!vfd->vidioc_s_output)
948                         break;
949                 dbgarg (cmd, "value=%d\n",*i);
950                 ret=vfd->vidioc_s_output(file, fh, *i);
951                 break;
952         }
953
954         /* --- controls ---------------------------------------------- */
955         case VIDIOC_QUERYCTRL:
956         {
957                 struct v4l2_queryctrl *p=arg;
958
959                 if (!vfd->vidioc_queryctrl)
960                         break;
961                 ret=vfd->vidioc_queryctrl(file, fh, p);
962
963                 if (!ret)
964                         dbgarg (cmd, "id=%d, type=%d, name=%s, "
965                                         "min/max=%d/%d,"
966                                         " step=%d, default=%d, flags=0x%08x\n",
967                                         p->id,p->type,p->name,p->minimum,
968                                         p->maximum,p->step,p->default_value,
969                                         p->flags);
970                 break;
971         }
972         case VIDIOC_G_CTRL:
973         {
974                 struct v4l2_control *p = arg;
975
976                 if (!vfd->vidioc_g_ctrl)
977                         break;
978                 dbgarg(cmd, "Enum for index=%d\n", p->id);
979
980                 ret=vfd->vidioc_g_ctrl(file, fh, p);
981                 if (!ret)
982                         dbgarg2 ( "id=%d, value=%d\n", p->id, p->value);
983                 break;
984         }
985         case VIDIOC_S_CTRL:
986         {
987                 struct v4l2_control *p = arg;
988
989                 if (!vfd->vidioc_s_ctrl)
990                         break;
991                 dbgarg (cmd, "id=%d, value=%d\n", p->id, p->value);
992
993                 ret=vfd->vidioc_s_ctrl(file, fh, p);
994                 break;
995         }
996         case VIDIOC_QUERYMENU:
997         {
998                 struct v4l2_querymenu *p=arg;
999                 if (!vfd->vidioc_querymenu)
1000                         break;
1001                 ret=vfd->vidioc_querymenu(file, fh, p);
1002                 if (!ret)
1003                         dbgarg (cmd, "id=%d, index=%d, name=%s\n",
1004                                                 p->id,p->index,p->name);
1005                 break;
1006         }
1007         /* --- audio ---------------------------------------------- */
1008         case VIDIOC_ENUMAUDIO:
1009         {
1010                 struct v4l2_audio *p=arg;
1011
1012                 if (!vfd->vidioc_enumaudio)
1013                         break;
1014                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1015                 ret=vfd->vidioc_enumaudio(file, fh, p);
1016                 if (!ret)
1017                         dbgarg2("index=%d, name=%s, capability=%d, "
1018                                         "mode=%d\n",p->index,p->name,
1019                                         p->capability, p->mode);
1020                 break;
1021         }
1022         case VIDIOC_G_AUDIO:
1023         {
1024                 struct v4l2_audio *p=arg;
1025
1026                 if (!vfd->vidioc_g_audio)
1027                         break;
1028                 dbgarg(cmd, "Get for index=%d\n", p->index);
1029                 ret=vfd->vidioc_g_audio(file, fh, p);
1030                 if (!ret)
1031                         dbgarg2("index=%d, name=%s, capability=%d, "
1032                                         "mode=%d\n",p->index,
1033                                         p->name,p->capability, p->mode);
1034                 break;
1035         }
1036         case VIDIOC_S_AUDIO:
1037         {
1038                 struct v4l2_audio *p=arg;
1039
1040                 if (!vfd->vidioc_s_audio)
1041                         break;
1042                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1043                                         "mode=%d\n", p->index, p->name,
1044                                         p->capability, p->mode);
1045                 ret=vfd->vidioc_s_audio(file, fh, p);
1046                 break;
1047         }
1048         case VIDIOC_ENUMAUDOUT:
1049         {
1050                 struct v4l2_audioout *p=arg;
1051
1052                 if (!vfd->vidioc_enumaudout)
1053                         break;
1054                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1055                 ret=vfd->vidioc_enumaudout(file, fh, p);
1056                 if (!ret)
1057                         dbgarg2("index=%d, name=%s, capability=%d, "
1058                                         "mode=%d\n", p->index, p->name,
1059                                         p->capability,p->mode);
1060                 break;
1061         }
1062         case VIDIOC_G_AUDOUT:
1063         {
1064                 struct v4l2_audioout *p=arg;
1065
1066                 if (!vfd->vidioc_g_audout)
1067                         break;
1068                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1069                 ret=vfd->vidioc_g_audout(file, fh, p);
1070                 if (!ret)
1071                         dbgarg2("index=%d, name=%s, capability=%d, "
1072                                         "mode=%d\n", p->index, p->name,
1073                                         p->capability,p->mode);
1074                 break;
1075         }
1076         case VIDIOC_S_AUDOUT:
1077         {
1078                 struct v4l2_audioout *p=arg;
1079
1080                 if (!vfd->vidioc_s_audout)
1081                         break;
1082                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1083                                         "mode=%d\n", p->index, p->name,
1084                                         p->capability,p->mode);
1085
1086                 ret=vfd->vidioc_s_audout(file, fh, p);
1087                 break;
1088         }
1089         case VIDIOC_G_MODULATOR:
1090         {
1091                 struct v4l2_modulator *p=arg;
1092                 if (!vfd->vidioc_g_modulator)
1093                         break;
1094                 ret=vfd->vidioc_g_modulator(file, fh, p);
1095                 if (!ret)
1096                         dbgarg(cmd, "index=%d, name=%s, "
1097                                         "capability=%d, rangelow=%d,"
1098                                         " rangehigh=%d, txsubchans=%d\n",
1099                                         p->index, p->name,p->capability,
1100                                         p->rangelow, p->rangehigh,
1101                                         p->txsubchans);
1102                 break;
1103         }
1104         case VIDIOC_S_MODULATOR:
1105         {
1106                 struct v4l2_modulator *p=arg;
1107                 if (!vfd->vidioc_s_modulator)
1108                         break;
1109                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1110                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1111                                 p->index, p->name,p->capability,p->rangelow,
1112                                 p->rangehigh,p->txsubchans);
1113                         ret=vfd->vidioc_s_modulator(file, fh, p);
1114                 break;
1115         }
1116         case VIDIOC_G_CROP:
1117         {
1118                 struct v4l2_crop *p=arg;
1119                 if (!vfd->vidioc_g_crop)
1120                         break;
1121                 ret=vfd->vidioc_g_crop(file, fh, p);
1122                 if (!ret) {
1123                         dbgarg(cmd, "type=%d\n", p->type);
1124                         dbgrect(vfd, "", &p->c);
1125                 }
1126                 break;
1127         }
1128         case VIDIOC_S_CROP:
1129         {
1130                 struct v4l2_crop *p=arg;
1131                 if (!vfd->vidioc_s_crop)
1132                         break;
1133                 dbgarg(cmd, "type=%d\n", p->type);
1134                 dbgrect(vfd, "", &p->c);
1135                 ret=vfd->vidioc_s_crop(file, fh, p);
1136                 break;
1137         }
1138         case VIDIOC_CROPCAP:
1139         {
1140                 struct v4l2_cropcap *p=arg;
1141                 /*FIXME: Should also show v4l2_fract pixelaspect */
1142                 if (!vfd->vidioc_cropcap)
1143                         break;
1144                 dbgarg(cmd, "type=%d\n", p->type);
1145                 dbgrect(vfd, "bounds ", &p->bounds);
1146                 dbgrect(vfd, "defrect ", &p->defrect);
1147                 ret=vfd->vidioc_cropcap(file, fh, p);
1148                 break;
1149         }
1150         case VIDIOC_G_MPEGCOMP:
1151         {
1152                 struct v4l2_mpeg_compression *p=arg;
1153                 /*FIXME: Several fields not shown */
1154                 if (!vfd->vidioc_g_mpegcomp)
1155                         break;
1156                 ret=vfd->vidioc_g_mpegcomp(file, fh, p);
1157                 if (!ret)
1158                         dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d,"
1159                                         " ts_pid_video=%d, ts_pid_pcr=%d, "
1160                                         "ps_size=%d, au_sample_rate=%d, "
1161                                         "au_pesid=%c, vi_frame_rate=%d, "
1162                                         "vi_frames_per_gop=%d, "
1163                                         "vi_bframes_count=%d, vi_pesid=%c\n",
1164                                         p->ts_pid_pmt,p->ts_pid_audio,
1165                                         p->ts_pid_video,p->ts_pid_pcr,
1166                                         p->ps_size, p->au_sample_rate,
1167                                         p->au_pesid, p->vi_frame_rate,
1168                                         p->vi_frames_per_gop,
1169                                         p->vi_bframes_count, p->vi_pesid);
1170                 break;
1171         }
1172         case VIDIOC_S_MPEGCOMP:
1173         {
1174                 struct v4l2_mpeg_compression *p=arg;
1175                 /*FIXME: Several fields not shown */
1176                 if (!vfd->vidioc_s_mpegcomp)
1177                         break;
1178                 dbgarg (cmd, "ts_pid_pmt=%d, ts_pid_audio=%d, "
1179                                 "ts_pid_video=%d, ts_pid_pcr=%d, ps_size=%d, "
1180                                 "au_sample_rate=%d, au_pesid=%c, "
1181                                 "vi_frame_rate=%d, vi_frames_per_gop=%d, "
1182                                 "vi_bframes_count=%d, vi_pesid=%c\n",
1183                                 p->ts_pid_pmt,p->ts_pid_audio, p->ts_pid_video,
1184                                 p->ts_pid_pcr, p->ps_size, p->au_sample_rate,
1185                                 p->au_pesid, p->vi_frame_rate,
1186                                 p->vi_frames_per_gop, p->vi_bframes_count,
1187                                 p->vi_pesid);
1188                 ret=vfd->vidioc_s_mpegcomp(file, fh, p);
1189                 break;
1190         }
1191         case VIDIOC_G_JPEGCOMP:
1192         {
1193                 struct v4l2_jpegcompression *p=arg;
1194                 if (!vfd->vidioc_g_jpegcomp)
1195                         break;
1196                 ret=vfd->vidioc_g_jpegcomp(file, fh, p);
1197                 if (!ret)
1198                         dbgarg (cmd, "quality=%d, APPn=%d, "
1199                                                 "APP_len=%d, COM_len=%d, "
1200                                                 "jpeg_markers=%d\n",
1201                                                 p->quality,p->APPn,p->APP_len,
1202                                                 p->COM_len,p->jpeg_markers);
1203                 break;
1204         }
1205         case VIDIOC_S_JPEGCOMP:
1206         {
1207                 struct v4l2_jpegcompression *p=arg;
1208                 if (!vfd->vidioc_g_jpegcomp)
1209                         break;
1210                 dbgarg (cmd, "quality=%d, APPn=%d, APP_len=%d, "
1211                                         "COM_len=%d, jpeg_markers=%d\n",
1212                                         p->quality,p->APPn,p->APP_len,
1213                                         p->COM_len,p->jpeg_markers);
1214                         ret=vfd->vidioc_s_jpegcomp(file, fh, p);
1215                 break;
1216         }
1217         case VIDIOC_G_PARM:
1218         {
1219                 struct v4l2_streamparm *p=arg;
1220                 if (!vfd->vidioc_g_parm)
1221                         break;
1222                 ret=vfd->vidioc_g_parm(file, fh, p);
1223                 dbgarg (cmd, "type=%d\n", p->type);
1224                 break;
1225         }
1226         case VIDIOC_S_PARM:
1227         {
1228                 struct v4l2_streamparm *p=arg;
1229                 if (!vfd->vidioc_s_parm)
1230                         break;
1231                 dbgarg (cmd, "type=%d\n", p->type);
1232                 ret=vfd->vidioc_s_parm(file, fh, p);
1233                 break;
1234         }
1235         case VIDIOC_G_TUNER:
1236         {
1237                 struct v4l2_tuner *p=arg;
1238                 if (!vfd->vidioc_g_tuner)
1239                         break;
1240                 ret=vfd->vidioc_g_tuner(file, fh, p);
1241                 if (!ret)
1242                         dbgarg (cmd, "index=%d, name=%s, type=%d, "
1243                                         "capability=%d, rangelow=%d, "
1244                                         "rangehigh=%d, signal=%d, afc=%d, "
1245                                         "rxsubchans=%d, audmode=%d\n",
1246                                         p->index, p->name, p->type,
1247                                         p->capability, p->rangelow,
1248                                         p->rangehigh, p->rxsubchans,
1249                                         p->audmode, p->signal, p->afc);
1250                 break;
1251         }
1252         case VIDIOC_S_TUNER:
1253         {
1254                 struct v4l2_tuner *p=arg;
1255                 if (!vfd->vidioc_s_tuner)
1256                         break;
1257                 dbgarg (cmd, "index=%d, name=%s, type=%d, "
1258                                 "capability=%d, rangelow=%d, rangehigh=%d, "
1259                                 "signal=%d, afc=%d, rxsubchans=%d, "
1260                                 "audmode=%d\n",p->index, p->name, p->type,
1261                                 p->capability, p->rangelow,p->rangehigh,
1262                                 p->rxsubchans, p->audmode, p->signal,
1263                                 p->afc);
1264                 ret=vfd->vidioc_s_tuner(file, fh, p);
1265                 break;
1266         }
1267         case VIDIOC_G_FREQUENCY:
1268         {
1269                 struct v4l2_frequency *p=arg;
1270                 if (!vfd->vidioc_g_frequency)
1271                         break;
1272                 ret=vfd->vidioc_g_frequency(file, fh, p);
1273                 if (!ret)
1274                         dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1275                                                 p->tuner,p->type,p->frequency);
1276                 break;
1277         }
1278         case VIDIOC_S_FREQUENCY:
1279         {
1280                 struct v4l2_frequency *p=arg;
1281                 if (!vfd->vidioc_s_frequency)
1282                         break;
1283                 dbgarg (cmd, "tuner=%d, type=%d, frequency=%d\n",
1284                                 p->tuner,p->type,p->frequency);
1285                 ret=vfd->vidioc_s_frequency(file, fh, p);
1286                 break;
1287         }
1288         case VIDIOC_G_SLICED_VBI_CAP:
1289         {
1290                 struct v4l2_sliced_vbi_cap *p=arg;
1291                 if (!vfd->vidioc_g_sliced_vbi_cap)
1292                         break;
1293                 ret=vfd->vidioc_g_sliced_vbi_cap(file, fh, p);
1294                 if (!ret)
1295                         dbgarg (cmd, "service_set=%d\n", p->service_set);
1296                 break;
1297         }
1298         case VIDIOC_LOG_STATUS:
1299         {
1300                 if (!vfd->vidioc_log_status)
1301                         break;
1302                 ret=vfd->vidioc_log_status(file, fh);
1303                 break;
1304         }
1305
1306         /* --- Others --------------------------------------------- */
1307
1308         default:
1309                 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,__video_do_ioctl);
1310         }
1311
1312         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
1313                 if (ret<0) {
1314                         printk ("%s: err:\n", vfd->name);
1315                         v4l_print_ioctl(vfd->name, cmd);
1316                 }
1317         }
1318
1319         return ret;
1320 }
1321
1322 int video_ioctl2 (struct inode *inode, struct file *file,
1323                unsigned int cmd, unsigned long arg)
1324 {
1325         char    sbuf[128];
1326         void    *mbuf = NULL;
1327         void    *parg = NULL;
1328         int     err  = -EINVAL;
1329
1330 #ifdef __OLD_VIDIOC_
1331         cmd = video_fix_command(cmd);
1332 #endif
1333
1334         /*  Copy arguments into temp kernel buffer  */
1335         switch (_IOC_DIR(cmd)) {
1336         case _IOC_NONE:
1337                 parg = NULL;
1338                 break;
1339         case _IOC_READ:
1340         case _IOC_WRITE:
1341         case (_IOC_WRITE | _IOC_READ):
1342                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
1343                         parg = sbuf;
1344                 } else {
1345                         /* too big to allocate from stack */
1346                         mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL);
1347                         if (NULL == mbuf)
1348                                 return -ENOMEM;
1349                         parg = mbuf;
1350                 }
1351
1352                 err = -EFAULT;
1353                 if (_IOC_DIR(cmd) & _IOC_WRITE)
1354                         if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
1355                                 goto out;
1356                 break;
1357         }
1358
1359         /* Handles IOCTL */
1360         err = __video_do_ioctl(inode, file, cmd, parg);
1361         if (err == -ENOIOCTLCMD)
1362                 err = -EINVAL;
1363         if (err < 0)
1364                 goto out;
1365
1366         /*  Copy results into user buffer  */
1367         switch (_IOC_DIR(cmd))
1368         {
1369         case _IOC_READ:
1370         case (_IOC_WRITE | _IOC_READ):
1371                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
1372                         err = -EFAULT;
1373                 break;
1374         }
1375
1376 out:
1377         kfree(mbuf);
1378         return err;
1379 }
1380
1381
1382 static struct file_operations video_fops;
1383
1384 /**
1385  *      video_register_device - register video4linux devices
1386  *      @vfd:  video device structure we want to register
1387  *      @type: type of device to register
1388  *      @nr:   which device number (0 == /dev/video0, 1 == /dev/video1, ...
1389  *             -1 == first free)
1390  *
1391  *      The registration code assigns minor numbers based on the type
1392  *      requested. -ENFILE is returned in all the device slots for this
1393  *      category are full. If not then the minor field is set and the
1394  *      driver initialize function is called (if non %NULL).
1395  *
1396  *      Zero is returned on success.
1397  *
1398  *      Valid types are
1399  *
1400  *      %VFL_TYPE_GRABBER - A frame grabber
1401  *
1402  *      %VFL_TYPE_VTX - A teletext device
1403  *
1404  *      %VFL_TYPE_VBI - Vertical blank data (undecoded)
1405  *
1406  *      %VFL_TYPE_RADIO - A radio card
1407  */
1408
1409 int video_register_device(struct video_device *vfd, int type, int nr)
1410 {
1411         int i=0;
1412         int base;
1413         int end;
1414         char *name_base;
1415
1416         switch(type)
1417         {
1418                 case VFL_TYPE_GRABBER:
1419                         base=MINOR_VFL_TYPE_GRABBER_MIN;
1420                         end=MINOR_VFL_TYPE_GRABBER_MAX+1;
1421                         name_base = "video";
1422                         break;
1423                 case VFL_TYPE_VTX:
1424                         base=MINOR_VFL_TYPE_VTX_MIN;
1425                         end=MINOR_VFL_TYPE_VTX_MAX+1;
1426                         name_base = "vtx";
1427                         break;
1428                 case VFL_TYPE_VBI:
1429                         base=MINOR_VFL_TYPE_VBI_MIN;
1430                         end=MINOR_VFL_TYPE_VBI_MAX+1;
1431                         name_base = "vbi";
1432                         break;
1433                 case VFL_TYPE_RADIO:
1434                         base=MINOR_VFL_TYPE_RADIO_MIN;
1435                         end=MINOR_VFL_TYPE_RADIO_MAX+1;
1436                         name_base = "radio";
1437                         break;
1438                 default:
1439                         return -1;
1440         }
1441
1442         /* pick a minor number */
1443         mutex_lock(&videodev_lock);
1444         if (nr >= 0  &&  nr < end-base) {
1445                 /* use the one the driver asked for */
1446                 i = base+nr;
1447                 if (NULL != video_device[i]) {
1448                         mutex_unlock(&videodev_lock);
1449                         return -ENFILE;
1450                 }
1451         } else {
1452                 /* use first free */
1453                 for(i=base;i<end;i++)
1454                         if (NULL == video_device[i])
1455                                 break;
1456                 if (i == end) {
1457                         mutex_unlock(&videodev_lock);
1458                         return -ENFILE;
1459                 }
1460         }
1461         video_device[i]=vfd;
1462         vfd->minor=i;
1463         mutex_unlock(&videodev_lock);
1464
1465         sprintf(vfd->devfs_name, "v4l/%s%d", name_base, i - base);
1466         devfs_mk_cdev(MKDEV(VIDEO_MAJOR, vfd->minor),
1467                         S_IFCHR | S_IRUSR | S_IWUSR, vfd->devfs_name);
1468         mutex_init(&vfd->lock);
1469
1470         /* sysfs class */
1471         memset(&vfd->class_dev, 0x00, sizeof(vfd->class_dev));
1472         if (vfd->dev)
1473                 vfd->class_dev.dev = vfd->dev;
1474         vfd->class_dev.class       = &video_class;
1475         vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
1476         strlcpy(vfd->class_dev.class_id, vfd->devfs_name + 4, BUS_ID_SIZE);
1477         class_device_register(&vfd->class_dev);
1478         class_device_create_file(&vfd->class_dev,
1479                                 &class_device_attr_name);
1480
1481 #if 1
1482         /* needed until all drivers are fixed */
1483         if (!vfd->release)
1484                 printk(KERN_WARNING "videodev: \"%s\" has no release callback. "
1485                        "Please fix your driver for proper sysfs support, see "
1486                        "http://lwn.net/Articles/36850/\n", vfd->name);
1487 #endif
1488         return 0;
1489 }
1490
1491 /**
1492  *      video_unregister_device - unregister a video4linux device
1493  *      @vfd: the device to unregister
1494  *
1495  *      This unregisters the passed device and deassigns the minor
1496  *      number. Future open calls will be met with errors.
1497  */
1498
1499 void video_unregister_device(struct video_device *vfd)
1500 {
1501         mutex_lock(&videodev_lock);
1502         if(video_device[vfd->minor]!=vfd)
1503                 panic("videodev: bad unregister");
1504
1505         devfs_remove(vfd->devfs_name);
1506         video_device[vfd->minor]=NULL;
1507         class_device_unregister(&vfd->class_dev);
1508         mutex_unlock(&videodev_lock);
1509 }
1510
1511 /*
1512  * Video fs operations
1513  */
1514 static struct file_operations video_fops=
1515 {
1516         .owner          = THIS_MODULE,
1517         .llseek         = no_llseek,
1518         .open           = video_open,
1519 };
1520
1521 /*
1522  *      Initialise video for linux
1523  */
1524
1525 static int __init videodev_init(void)
1526 {
1527         int ret;
1528
1529         printk(KERN_INFO "Linux video capture interface: v2.00\n");
1530         if (register_chrdev(VIDEO_MAJOR, VIDEO_NAME, &video_fops)) {
1531                 printk(KERN_WARNING "video_dev: unable to get major %d\n", VIDEO_MAJOR);
1532                 return -EIO;
1533         }
1534
1535         ret = class_register(&video_class);
1536         if (ret < 0) {
1537                 unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1538                 printk(KERN_WARNING "video_dev: class_register failed\n");
1539                 return -EIO;
1540         }
1541
1542         return 0;
1543 }
1544
1545 static void __exit videodev_exit(void)
1546 {
1547         class_unregister(&video_class);
1548         unregister_chrdev(VIDEO_MAJOR, VIDEO_NAME);
1549 }
1550
1551 module_init(videodev_init)
1552 module_exit(videodev_exit)
1553
1554 EXPORT_SYMBOL(video_register_device);
1555 EXPORT_SYMBOL(video_unregister_device);
1556 EXPORT_SYMBOL(video_devdata);
1557 EXPORT_SYMBOL(video_usercopy);
1558 EXPORT_SYMBOL(video_exclusive_open);
1559 EXPORT_SYMBOL(video_exclusive_release);
1560 EXPORT_SYMBOL(video_ioctl2);
1561 EXPORT_SYMBOL(video_device_alloc);
1562 EXPORT_SYMBOL(video_device_release);
1563
1564 MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@infradead.org>");
1565 MODULE_DESCRIPTION("Device registrar for Video4Linux drivers v2");
1566 MODULE_LICENSE("GPL");
1567
1568
1569 /*
1570  * Local variables:
1571  * c-basic-offset: 8
1572  * End:
1573  */