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-rw-r--r--include/media/v4l2-dev.h378
1 files changed, 378 insertions, 0 deletions
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
new file mode 100644
index 000000000000..bb495b7f4680
--- /dev/null
+++ b/include/media/v4l2-dev.h
@@ -0,0 +1,378 @@
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_COMPAT
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/* Video standard functions */
44extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
45extern int v4l2_video_std_construct(struct v4l2_standard *vs,
46 int id, char *name);
47
48/* prority handling */
49struct v4l2_prio_state {
50 atomic_t prios[4];
51};
52int v4l2_prio_init(struct v4l2_prio_state *global);
53int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
54 enum v4l2_priority new);
55int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local);
56int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local);
57enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global);
58int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local);
59
60/* names for fancy debug output */
61extern char *v4l2_field_names[];
62extern char *v4l2_type_names[];
63
64/* Compatibility layer interface -- v4l1-compat module */
65typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file,
66 unsigned int cmd, void *arg);
67#ifdef CONFIG_VIDEO_V4L1_COMPAT
68int v4l_compat_translate_ioctl(struct inode *inode, struct file *file,
69 int cmd, void *arg, v4l2_kioctl driver_ioctl);
70#else
71#define v4l_compat_translate_ioctl(inode,file,cmd,arg,ioctl) -EINVAL
72#endif
73
74/* 32 Bits compatibility layer for 64 bits processors */
75extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
76 unsigned long arg);
77
78/*
79 * Newer version of video_device, handled by videodev2.c
80 * This version moves redundant code from video device code to
81 * the common handler
82 */
83struct v4l2_tvnorm {
84 char *name;
85 v4l2_std_id id;
86
87 void *priv_data;
88};
89
90struct video_device
91{
92 /* device ops */
93 const struct file_operations *fops;
94
95 /* device info */
96 struct device *dev;
97 char name[32];
98 int type; /* v4l1 */
99 int type2; /* v4l2 */
100 int hardware;
101 int minor;
102
103 int debug; /* Activates debug level*/
104
105 /* Video standard vars */
106 int tvnormsize; /* Size of tvnorm array */
107 v4l2_std_id current_norm; /* Current tvnorm */
108 struct v4l2_tvnorm *tvnorms;
109
110 /* callbacks */
111 void (*release)(struct video_device *vfd);
112
113 /* ioctl callbacks */
114
115 /* VIDIOC_QUERYCAP handler */
116 int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
117
118 /* Priority handling */
119 int (*vidioc_g_priority) (struct file *file, void *fh,
120 enum v4l2_priority *p);
121 int (*vidioc_s_priority) (struct file *file, void *fh,
122 enum v4l2_priority p);
123
124 /* VIDIOC_ENUM_FMT handlers */
125 int (*vidioc_enum_fmt_cap) (struct file *file, void *fh,
126 struct v4l2_fmtdesc *f);
127 int (*vidioc_enum_fmt_overlay) (struct file *file, void *fh,
128 struct v4l2_fmtdesc *f);
129 int (*vidioc_enum_fmt_vbi) (struct file *file, void *fh,
130 struct v4l2_fmtdesc *f);
131 int (*vidioc_enum_fmt_vbi_capture) (struct file *file, void *fh,
132 struct v4l2_fmtdesc *f);
133 int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh,
134 struct v4l2_fmtdesc *f);
135 int (*vidioc_enum_fmt_vbi_output) (struct file *file, void *fh,
136 struct v4l2_fmtdesc *f);
137 int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
138 struct v4l2_fmtdesc *f);
139
140 /* VIDIOC_G_FMT handlers */
141 int (*vidioc_g_fmt_cap) (struct file *file, void *fh,
142 struct v4l2_format *f);
143 int (*vidioc_g_fmt_overlay) (struct file *file, void *fh,
144 struct v4l2_format *f);
145 int (*vidioc_g_fmt_vbi) (struct file *file, void *fh,
146 struct v4l2_format *f);
147 int (*vidioc_g_fmt_vbi_output) (struct file *file, void *fh,
148 struct v4l2_format *f);
149 int (*vidioc_g_fmt_vbi_capture)(struct file *file, void *fh,
150 struct v4l2_format *f);
151 int (*vidioc_g_fmt_video_output)(struct file *file, void *fh,
152 struct v4l2_format *f);
153 int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
154 struct v4l2_format *f);
155
156 /* VIDIOC_S_FMT handlers */
157 int (*vidioc_s_fmt_cap) (struct file *file, void *fh,
158 struct v4l2_format *f);
159
160 int (*vidioc_s_fmt_overlay) (struct file *file, void *fh,
161 struct v4l2_format *f);
162 int (*vidioc_s_fmt_vbi) (struct file *file, void *fh,
163 struct v4l2_format *f);
164 int (*vidioc_s_fmt_vbi_output) (struct file *file, void *fh,
165 struct v4l2_format *f);
166 int (*vidioc_s_fmt_vbi_capture)(struct file *file, void *fh,
167 struct v4l2_format *f);
168 int (*vidioc_s_fmt_video_output)(struct file *file, void *fh,
169 struct v4l2_format *f);
170 int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
171 struct v4l2_format *f);
172
173 /* VIDIOC_TRY_FMT handlers */
174 int (*vidioc_try_fmt_cap) (struct file *file, void *fh,
175 struct v4l2_format *f);
176 int (*vidioc_try_fmt_overlay) (struct file *file, void *fh,
177 struct v4l2_format *f);
178 int (*vidioc_try_fmt_vbi) (struct file *file, void *fh,
179 struct v4l2_format *f);
180 int (*vidioc_try_fmt_vbi_output) (struct file *file, void *fh,
181 struct v4l2_format *f);
182 int (*vidioc_try_fmt_vbi_capture)(struct file *file, void *fh,
183 struct v4l2_format *f);
184 int (*vidioc_try_fmt_video_output)(struct file *file, void *fh,
185 struct v4l2_format *f);
186 int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
187 struct v4l2_format *f);
188
189 /* Buffer handlers */
190 int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
191 int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
192 int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
193 int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
194
195
196 int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
197#ifdef CONFIG_VIDEO_V4L1_COMPAT
198 /* buffer type is struct vidio_mbuf * */
199 int (*vidiocgmbuf) (struct file *file, void *fh, struct video_mbuf *p);
200#endif
201 int (*vidioc_g_fbuf) (struct file *file, void *fh,
202 struct v4l2_framebuffer *a);
203 int (*vidioc_s_fbuf) (struct file *file, void *fh,
204 struct v4l2_framebuffer *a);
205
206 /* Stream on/off */
207 int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
208 int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
209
210 /* Standard handling
211 G_STD and ENUMSTD are handled by videodev.c
212 */
213 int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id a);
214 int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
215
216 /* Input handling */
217 int (*vidioc_enum_input)(struct file *file, void *fh,
218 struct v4l2_input *inp);
219 int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i);
220 int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i);
221
222 /* Output handling */
223 int (*vidioc_enumoutput) (struct file *file, void *fh,
224 struct v4l2_output *a);
225 int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i);
226 int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i);
227
228 /* Control handling */
229 int (*vidioc_queryctrl) (struct file *file, void *fh,
230 struct v4l2_queryctrl *a);
231 int (*vidioc_g_ctrl) (struct file *file, void *fh,
232 struct v4l2_control *a);
233 int (*vidioc_s_ctrl) (struct file *file, void *fh,
234 struct v4l2_control *a);
235 int (*vidioc_g_ext_ctrls) (struct file *file, void *fh,
236 struct v4l2_ext_controls *a);
237 int (*vidioc_s_ext_ctrls) (struct file *file, void *fh,
238 struct v4l2_ext_controls *a);
239 int (*vidioc_try_ext_ctrls) (struct file *file, void *fh,
240 struct v4l2_ext_controls *a);
241 int (*vidioc_querymenu) (struct file *file, void *fh,
242 struct v4l2_querymenu *a);
243
244 /* Audio ioctls */
245 int (*vidioc_enumaudio) (struct file *file, void *fh,
246 struct v4l2_audio *a);
247 int (*vidioc_g_audio) (struct file *file, void *fh,
248 struct v4l2_audio *a);
249 int (*vidioc_s_audio) (struct file *file, void *fh,
250 struct v4l2_audio *a);
251
252 /* Audio out ioctls */
253 int (*vidioc_enumaudout) (struct file *file, void *fh,
254 struct v4l2_audioout *a);
255 int (*vidioc_g_audout) (struct file *file, void *fh,
256 struct v4l2_audioout *a);
257 int (*vidioc_s_audout) (struct file *file, void *fh,
258 struct v4l2_audioout *a);
259 int (*vidioc_g_modulator) (struct file *file, void *fh,
260 struct v4l2_modulator *a);
261 int (*vidioc_s_modulator) (struct file *file, void *fh,
262 struct v4l2_modulator *a);
263 /* Crop ioctls */
264 int (*vidioc_cropcap) (struct file *file, void *fh,
265 struct v4l2_cropcap *a);
266 int (*vidioc_g_crop) (struct file *file, void *fh,
267 struct v4l2_crop *a);
268 int (*vidioc_s_crop) (struct file *file, void *fh,
269 struct v4l2_crop *a);
270 /* Compression ioctls */
271 int (*vidioc_g_mpegcomp) (struct file *file, void *fh,
272 struct v4l2_mpeg_compression *a);
273 int (*vidioc_s_mpegcomp) (struct file *file, void *fh,
274 struct v4l2_mpeg_compression *a);
275 int (*vidioc_g_jpegcomp) (struct file *file, void *fh,
276 struct v4l2_jpegcompression *a);
277 int (*vidioc_s_jpegcomp) (struct file *file, void *fh,
278 struct v4l2_jpegcompression *a);
279
280 /* Stream type-dependent parameter ioctls */
281 int (*vidioc_g_parm) (struct file *file, void *fh,
282 struct v4l2_streamparm *a);
283 int (*vidioc_s_parm) (struct file *file, void *fh,
284 struct v4l2_streamparm *a);
285
286 /* Tuner ioctls */
287 int (*vidioc_g_tuner) (struct file *file, void *fh,
288 struct v4l2_tuner *a);
289 int (*vidioc_s_tuner) (struct file *file, void *fh,
290 struct v4l2_tuner *a);
291 int (*vidioc_g_frequency) (struct file *file, void *fh,
292 struct v4l2_frequency *a);
293 int (*vidioc_s_frequency) (struct file *file, void *fh,
294 struct v4l2_frequency *a);
295
296 /* Sliced VBI cap */
297 int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
298 struct v4l2_sliced_vbi_cap *a);
299
300 /* Log status ioctl */
301 int (*vidioc_log_status) (struct file *file, void *fh);
302
303
304#ifdef OBSOLETE_OWNER /* to be removed soon */
305/* obsolete -- fops->owner is used instead */
306struct module *owner;
307/* dev->driver_data will be used instead some day.
308 * Use the video_{get|set}_drvdata() helper functions,
309 * so the switch over will be transparent for you.
310 * Or use {pci|usb}_{get|set}_drvdata() directly. */
311void *priv;
312#endif
313
314 /* for videodev.c intenal usage -- please don't touch */
315 int users; /* video_exclusive_{open|close} ... */
316 struct mutex lock; /* ... helper function uses these */
317 struct class_device class_dev; /* sysfs */
318};
319
320/* Version 2 functions */
321extern int video_register_device(struct video_device *vfd, int type, int nr);
322void video_unregister_device(struct video_device *);
323extern int video_ioctl2(struct inode *inode, struct file *file,
324 unsigned int cmd, unsigned long arg);
325
326/* helper functions to alloc / release struct video_device, the
327 later can be used for video_device->release() */
328struct video_device *video_device_alloc(void);
329void video_device_release(struct video_device *vfd);
330
331/* Include support for obsoleted stuff */
332extern int video_usercopy(struct inode *inode, struct file *file,
333 unsigned int cmd, unsigned long arg,
334 int (*func)(struct inode *inode, struct file *file,
335 unsigned int cmd, void *arg));
336
337
338#ifdef CONFIG_VIDEO_V4L1_COMPAT
339#include <linux/mm.h>
340
341extern struct video_device* video_devdata(struct file*);
342
343#define to_video_device(cd) container_of(cd, struct video_device, class_dev)
344static inline int __must_check
345video_device_create_file(struct video_device *vfd,
346 struct class_device_attribute *attr)
347{
348 int ret = class_device_create_file(&vfd->class_dev, attr);
349 if (ret < 0)
350 printk(KERN_WARNING "%s error: %d\n", __FUNCTION__, ret);
351 return ret;
352}
353static inline void
354video_device_remove_file(struct video_device *vfd,
355 struct class_device_attribute *attr)
356{
357 class_device_remove_file(&vfd->class_dev, attr);
358}
359
360#endif /* CONFIG_VIDEO_V4L1_COMPAT */
361
362#ifdef OBSOLETE_OWNER /* to be removed soon */
363/* helper functions to access driver private data. */
364static inline void *video_get_drvdata(struct video_device *dev)
365{
366 return dev->priv;
367}
368
369static inline void video_set_drvdata(struct video_device *dev, void *data)
370{
371 dev->priv = data;
372}
373#endif
374
375extern int video_exclusive_open(struct inode *inode, struct file *file);
376extern int video_exclusive_release(struct inode *inode, struct file *file);
377
378#endif /* _V4L2_DEV_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-10 19:12:25 -0500