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authorMauro Carvalho Chehab <mchehab@infradead.org>2006-06-04 09:06:18 -0400
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-06-25 01:05:04 -0400
commit401998fa96fe18b057af3f906527196522dd2d9d (patch)
tree32d656e18410ab05204c83b57969db23665e4fe9 /include/media/v4l2-dev.h
parent7565ab082de88ec274283d6b83980144e520a2fc (diff)
V4L/DVB (4065): Several improvements at videodev.c
Videodev now is capable of better handling V4L2 api, by processing V4L2 ioctls and using callbacks to the driver. The drivers should be migrated to the newer way and the older one will be obsoleted soon. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'include/media/v4l2-dev.h')
-rw-r--r--include/media/v4l2-dev.h371
1 files changed, 371 insertions, 0 deletions
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
new file mode 100644
index 000000000000..c2f54d2c9a4c
--- /dev/null
+++ b/include/media/v4l2-dev.h
@@ -0,0 +1,371 @@
1/*
2 *
3 * V 4 L 2 D R I V E R H E L P E R A P I
4 *
5 * Moved from videodev2.h
6 *
7 * Some commonly needed functions for drivers (v4l2-common.o module)
8 */
9#ifndef _V4L2_DEV_H
10#define _V4L2_DEV_H
11
12#define OBSOLETE_OWNER 1 /* to be removed soon */
13
14#include <linux/poll.h>
15#include <linux/fs.h>
16#include <linux/device.h>
17#include <linux/mutex.h>
18#include <linux/compiler.h> /* need __user */
19#ifdef CONFIG_VIDEO_V4L1
20#include <linux/videodev.h>
21#else
22#include <linux/videodev2.h>
23#endif
24
25#include <linux/fs.h>
26
27#define VIDEO_MAJOR 81
28/* Minor device allocation */
29#define MINOR_VFL_TYPE_GRABBER_MIN 0
30#define MINOR_VFL_TYPE_GRABBER_MAX 63
31#define MINOR_VFL_TYPE_RADIO_MIN 64
32#define MINOR_VFL_TYPE_RADIO_MAX 127
33#define MINOR_VFL_TYPE_VTX_MIN 192
34#define MINOR_VFL_TYPE_VTX_MAX 223
35#define MINOR_VFL_TYPE_VBI_MIN 224
36#define MINOR_VFL_TYPE_VBI_MAX 255
37
38#define VFL_TYPE_GRABBER 0
39#define VFL_TYPE_VBI 1
40#define VFL_TYPE_RADIO 2
41#define VFL_TYPE_VTX 3
42
43 const struct file_operations *fops;
44
45/* Video standard functions */
46extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
47extern int v4l2_video_std_construct(struct v4l2_standard *vs,
48 int id, char *name);
49
50/* prority handling */
51struct v4l2_prio_state {
52 atomic_t prios[4];
53};
54int v4l2_prio_init(struct v4l2_prio_state *global);
55int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
56 enum v4l2_priority new);
57int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local);
58int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local);
59enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global);
60int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local);
61
62/* names for fancy debug output */
63extern char *v4l2_field_names[];
64extern char *v4l2_type_names[];
65
66/* Compatibility layer interface -- v4l1-compat module */
67typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file,
68 unsigned int cmd, void *arg);
69#ifdef CONFIG_VIDEO_V4L1_COMPAT
70int v4l_compat_translate_ioctl(struct inode *inode, struct file *file,
71 int cmd, void *arg, v4l2_kioctl driver_ioctl);
72#else
73#define v4l_compat_translate_ioctl(inode,file,cmd,arg,ioctl) -EINVAL
74#endif
75
76/* 32 Bits compatibility layer for 64 bits processors */
77extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
78 unsigned long arg);
79
80/*
81 * Newer version of video_device, handled by videodev2.c
82 * This version moves redundant code from video device code to
83 * the common handler
84 */
85struct v4l2_tvnorm {
86 char *name;
87 v4l2_std_id id;
88
89 void *priv_data;
90};
91
92struct video_device
93{
94 /* device ops */
95 struct file_operations *fops;
96
97 /* device info */
98 struct device *dev;
99 char name[32];
100 int type; /* v4l1 */
101 int type2; /* v4l2 */
102 int hardware;
103 int minor;
104
105 int debug; /* Activates debug level*/
106
107 /* Video standard vars */
108 int tvnormsize; /* Size of tvnorm array */
109 v4l2_std_id current_norm; /* Current tvnorm */
110 struct v4l2_tvnorm *tvnorms;
111
112 /* callbacks */
113 void (*release)(struct video_device *vfd);
114
115 /* ioctl callbacks */
116
117 /* VIDIOC_QUERYCAP handler */
118 int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
119
120 /* Priority handling */
121 int (*vidioc_g_priority) (struct file *file, void *fh,
122 enum v4l2_priority *p);
123 int (*vidioc_s_priority) (struct file *file, void *fh,
124 enum v4l2_priority p);
125
126 /* VIDIOC_ENUM_FMT handlers */
127 int (*vidioc_enum_fmt_cap) (struct file *file, void *fh,
128 struct v4l2_fmtdesc *f);
129 int (*vidioc_enum_fmt_overlay) (struct file *file, void *fh,
130 struct v4l2_fmtdesc *f);
131 int (*vidioc_enum_fmt_vbi) (struct file *file, void *fh,
132 struct v4l2_fmtdesc *f);
133 int (*vidioc_enum_fmt_vbi_capture) (struct file *file, void *fh,
134 struct v4l2_fmtdesc *f);
135 int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh,
136 struct v4l2_fmtdesc *f);
137 int (*vidioc_enum_fmt_vbi_output) (struct file *file, void *fh,
138 struct v4l2_fmtdesc *f);
139 int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
140 struct v4l2_fmtdesc *f);
141
142 /* VIDIOC_G_FMT handlers */
143 int (*vidioc_g_fmt_cap) (struct file *file, void *fh,
144 struct v4l2_format *f);
145 int (*vidioc_g_fmt_overlay) (struct file *file, void *fh,
146 struct v4l2_format *f);
147 int (*vidioc_g_fmt_vbi) (struct file *file, void *fh,
148 struct v4l2_format *f);
149 int (*vidioc_g_fmt_vbi_output) (struct file *file, void *fh,
150 struct v4l2_format *f);
151 int (*vidioc_g_fmt_vbi_capture)(struct file *file, void *fh,
152 struct v4l2_format *f);
153 int (*vidioc_g_fmt_video_output)(struct file *file, void *fh,
154 struct v4l2_format *f);
155 int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
156 struct v4l2_format *f);
157
158 /* VIDIOC_S_FMT handlers */
159 int (*vidioc_s_fmt_cap) (struct file *file, void *fh,
160 struct v4l2_format *f);
161
162 int (*vidioc_s_fmt_overlay) (struct file *file, void *fh,
163 struct v4l2_format *f);
164 int (*vidioc_s_fmt_vbi) (struct file *file, void *fh,
165 struct v4l2_format *f);
166 int (*vidioc_s_fmt_vbi_output) (struct file *file, void *fh,
167 struct v4l2_format *f);
168 int (*vidioc_s_fmt_vbi_capture)(struct file *file, void *fh,
169 struct v4l2_format *f);
170 int (*vidioc_s_fmt_video_output)(struct file *file, void *fh,
171 struct v4l2_format *f);
172 int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
173 struct v4l2_format *f);
174
175 /* VIDIOC_TRY_FMT handlers */
176 int (*vidioc_try_fmt_cap) (struct file *file, void *fh,
177 struct v4l2_format *f);
178 int (*vidioc_try_fmt_overlay) (struct file *file, void *fh,
179 struct v4l2_format *f);
180 int (*vidioc_try_fmt_vbi) (struct file *file, void *fh,
181 struct v4l2_format *f);
182 int (*vidioc_try_fmt_vbi_output) (struct file *file, void *fh,
183 struct v4l2_format *f);
184 int (*vidioc_try_fmt_vbi_capture)(struct file *file, void *fh,
185 struct v4l2_format *f);
186 int (*vidioc_try_fmt_video_output)(struct file *file, void *fh,
187 struct v4l2_format *f);
188 int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
189 struct v4l2_format *f);
190
191 /* Buffer handlers */
192 int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
193 int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
194 int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
195 int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
196
197
198 int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
199#ifdef HAVE_V4L1
200 /* buffer type is struct vidio_mbuf * */
201 int (*vidiocgmbuf) (struct file *file, void *fh, struct video_mbuf *p);
202#endif
203 int (*vidioc_g_fbuf) (struct file *file, void *fh,
204 struct v4l2_framebuffer *a);
205 int (*vidioc_s_fbuf) (struct file *file, void *fh,
206 struct v4l2_framebuffer *a);
207
208 /* Stream on/off */
209 int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
210 int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
211
212 /* Standard handling
213 G_STD and ENUMSTD are handled by videodev.c
214 */
215 int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id a);
216 int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
217
218 /* Input handling */
219 int (*vidioc_enum_input)(struct file *file, void *fh,
220 struct v4l2_input *inp);
221 int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i);
222 int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i);
223
224 /* Output handling */
225 int (*vidioc_enumoutput) (struct file *file, void *fh,
226 struct v4l2_output *a);
227 int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i);
228 int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i);
229
230 /* Control handling */
231 int (*vidioc_queryctrl) (struct file *file, void *fh,
232 struct v4l2_queryctrl *a);
233 int (*vidioc_g_ctrl) (struct file *file, void *fh,
234 struct v4l2_control *a);
235 int (*vidioc_s_ctrl) (struct file *file, void *fh,
236 struct v4l2_control *a);
237 int (*vidioc_querymenu) (struct file *file, void *fh,
238 struct v4l2_querymenu *a);
239
240 /* Audio ioctls */
241 int (*vidioc_enumaudio) (struct file *file, void *fh,
242 struct v4l2_audio *a);
243 int (*vidioc_g_audio) (struct file *file, void *fh,
244 struct v4l2_audio *a);
245 int (*vidioc_s_audio) (struct file *file, void *fh,
246 struct v4l2_audio *a);
247
248 /* Audio out ioctls */
249 int (*vidioc_enumaudout) (struct file *file, void *fh,
250 struct v4l2_audioout *a);
251 int (*vidioc_g_audout) (struct file *file, void *fh,
252 struct v4l2_audioout *a);
253 int (*vidioc_s_audout) (struct file *file, void *fh,
254 struct v4l2_audioout *a);
255 int (*vidioc_g_modulator) (struct file *file, void *fh,
256 struct v4l2_modulator *a);
257 int (*vidioc_s_modulator) (struct file *file, void *fh,
258 struct v4l2_modulator *a);
259 /* Crop ioctls */
260 int (*vidioc_cropcap) (struct file *file, void *fh,
261 struct v4l2_cropcap *a);
262 int (*vidioc_g_crop) (struct file *file, void *fh,
263 struct v4l2_crop *a);
264 int (*vidioc_s_crop) (struct file *file, void *fh,
265 struct v4l2_crop *a);
266 /* Compression ioctls */
267 int (*vidioc_g_mpegcomp) (struct file *file, void *fh,
268 struct v4l2_mpeg_compression *a);
269 int (*vidioc_s_mpegcomp) (struct file *file, void *fh,
270 struct v4l2_mpeg_compression *a);
271 int (*vidioc_g_jpegcomp) (struct file *file, void *fh,
272 struct v4l2_jpegcompression *a);
273 int (*vidioc_s_jpegcomp) (struct file *file, void *fh,
274 struct v4l2_jpegcompression *a);
275
276 /* Stream type-dependent parameter ioctls */
277 int (*vidioc_g_parm) (struct file *file, void *fh,
278 struct v4l2_streamparm *a);
279 int (*vidioc_s_parm) (struct file *file, void *fh,
280 struct v4l2_streamparm *a);
281
282 /* Tuner ioctls */
283 int (*vidioc_g_tuner) (struct file *file, void *fh,
284 struct v4l2_tuner *a);
285 int (*vidioc_s_tuner) (struct file *file, void *fh,
286 struct v4l2_tuner *a);
287 int (*vidioc_g_frequency) (struct file *file, void *fh,
288 struct v4l2_frequency *a);
289 int (*vidioc_s_frequency) (struct file *file, void *fh,
290 struct v4l2_frequency *a);
291
292 /* Sliced VBI cap */
293 int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
294 struct v4l2_sliced_vbi_cap *a);
295
296 /* Log status ioctl */
297 int (*vidioc_log_status) (struct file *file, void *fh);
298
299
300#if OBSOLETE_OWNER /* to be removed soon */
301/* obsolete -- fops->owner is used instead */
302struct module *owner;
303/* dev->driver_data will be used instead some day.
304 * Use the video_{get|set}_drvdata() helper functions,
305 * so the switch over will be transparent for you.
306 * Or use {pci|usb}_{get|set}_drvdata() directly. */
307void *priv;
308#endif
309
310 /* for videodev.c intenal usage -- please don't touch */
311 int users; /* video_exclusive_{open|close} ... */
312 struct mutex lock; /* ... helper function uses these */
313 char devfs_name[64]; /* devfs */
314 struct class_device class_dev; /* sysfs */
315};
316
317/* Version 2 functions */
318extern int video_register_device(struct video_device *vfd, int type, int nr);
319void video_unregister_device(struct video_device *);
320extern int video_ioctl2(struct inode *inode, struct file *file,
321 unsigned int cmd, unsigned long arg);
322
323/* helper functions to alloc / release struct video_device, the
324 later can be used for video_device->release() */
325struct video_device *video_device_alloc(void);
326void video_device_release(struct video_device *vfd);
327
328/* Include support for obsoleted stuff */
329extern int video_usercopy(struct inode *inode, struct file *file,
330 unsigned int cmd, unsigned long arg,
331 int (*func)(struct inode *inode, struct file *file,
332 unsigned int cmd, void *arg));
333
334
335#ifdef HAVE_V4L1
336#include <linux/mm.h>
337
338extern struct video_device* video_devdata(struct file*);
339
340#define to_video_device(cd) container_of(cd, struct video_device, class_dev)
341static inline void
342video_device_create_file(struct video_device *vfd,
343 struct class_device_attribute *attr)
344{
345 class_device_create_file(&vfd->class_dev, attr);
346}
347static inline void
348video_device_remove_file(struct video_device *vfd,
349 struct class_device_attribute *attr)
350{
351 class_device_remove_file(&vfd->class_dev, attr);
352}
353
354#if OBSOLETE_OWNER /* to be removed soon */
355/* helper functions to access driver private data. */
356static inline void *video_get_drvdata(struct video_device *dev)
357{
358 return dev->priv;
359}
360
361static inline void video_set_drvdata(struct video_device *dev, void *data)
362{
363 dev->priv = data;
364}
365#endif
366
367extern int video_exclusive_open(struct inode *inode, struct file *file);
368extern int video_exclusive_release(struct inode *inode, struct file *file);
369#endif /* HAVE_V4L1 */
370
371#endif /* _V4L2_DEV_H */
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