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401998fa MCC |
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 | ||
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12 | #define OBSOLETE_OWNER 1 /* to be removed soon */ |
13 | #define OBSOLETE_DEVDATA 1 /* to be removed soon */ | |
401998fa MCC |
14 | |
15 | #include <linux/poll.h> | |
16 | #include <linux/fs.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/mutex.h> | |
19 | #include <linux/compiler.h> /* need __user */ | |
487206f2 | 20 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
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21 | #include <linux/videodev.h> |
22 | #else | |
23 | #include <linux/videodev2.h> | |
24 | #endif | |
25 | ||
26 | #include <linux/fs.h> | |
27 | ||
28 | #define VIDEO_MAJOR 81 | |
29 | /* Minor device allocation */ | |
30 | #define MINOR_VFL_TYPE_GRABBER_MIN 0 | |
31 | #define MINOR_VFL_TYPE_GRABBER_MAX 63 | |
32 | #define MINOR_VFL_TYPE_RADIO_MIN 64 | |
33 | #define MINOR_VFL_TYPE_RADIO_MAX 127 | |
34 | #define MINOR_VFL_TYPE_VTX_MIN 192 | |
35 | #define MINOR_VFL_TYPE_VTX_MAX 223 | |
36 | #define MINOR_VFL_TYPE_VBI_MIN 224 | |
37 | #define MINOR_VFL_TYPE_VBI_MAX 255 | |
38 | ||
39 | #define VFL_TYPE_GRABBER 0 | |
40 | #define VFL_TYPE_VBI 1 | |
41 | #define VFL_TYPE_RADIO 2 | |
42 | #define VFL_TYPE_VTX 3 | |
43 | ||
401998fa MCC |
44 | /* Video standard functions */ |
45 | extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs); | |
46 | extern int v4l2_video_std_construct(struct v4l2_standard *vs, | |
47 | int id, char *name); | |
48 | ||
49 | /* prority handling */ | |
50 | struct v4l2_prio_state { | |
51 | atomic_t prios[4]; | |
52 | }; | |
53 | int v4l2_prio_init(struct v4l2_prio_state *global); | |
54 | int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local, | |
55 | enum v4l2_priority new); | |
56 | int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local); | |
57 | int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local); | |
58 | enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global); | |
59 | int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local); | |
60 | ||
61 | /* names for fancy debug output */ | |
62 | extern char *v4l2_field_names[]; | |
63 | extern char *v4l2_type_names[]; | |
64 | ||
65 | /* Compatibility layer interface -- v4l1-compat module */ | |
66 | typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file, | |
67 | unsigned int cmd, void *arg); | |
68 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
69 | int v4l_compat_translate_ioctl(struct inode *inode, struct file *file, | |
70 | int cmd, void *arg, v4l2_kioctl driver_ioctl); | |
71 | #else | |
72 | #define v4l_compat_translate_ioctl(inode,file,cmd,arg,ioctl) -EINVAL | |
73 | #endif | |
74 | ||
75 | /* 32 Bits compatibility layer for 64 bits processors */ | |
76 | extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd, | |
77 | unsigned long arg); | |
78 | ||
79 | /* | |
80 | * Newer version of video_device, handled by videodev2.c | |
81 | * This version moves redundant code from video device code to | |
82 | * the common handler | |
83 | */ | |
84 | struct v4l2_tvnorm { | |
85 | char *name; | |
86 | v4l2_std_id id; | |
87 | ||
88 | void *priv_data; | |
89 | }; | |
90 | ||
91 | struct video_device | |
92 | { | |
93 | /* device ops */ | |
5e87efa3 | 94 | const struct file_operations *fops; |
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95 | |
96 | /* device info */ | |
97 | struct device *dev; | |
98 | char name[32]; | |
99 | int type; /* v4l1 */ | |
100 | int type2; /* v4l2 */ | |
101 | int hardware; | |
102 | int minor; | |
103 | ||
104 | int debug; /* Activates debug level*/ | |
105 | ||
106 | /* Video standard vars */ | |
107 | int tvnormsize; /* Size of tvnorm array */ | |
108 | v4l2_std_id current_norm; /* Current tvnorm */ | |
109 | struct v4l2_tvnorm *tvnorms; | |
110 | ||
111 | /* callbacks */ | |
112 | void (*release)(struct video_device *vfd); | |
113 | ||
114 | /* ioctl callbacks */ | |
115 | ||
116 | /* VIDIOC_QUERYCAP handler */ | |
117 | int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap); | |
118 | ||
119 | /* Priority handling */ | |
120 | int (*vidioc_g_priority) (struct file *file, void *fh, | |
121 | enum v4l2_priority *p); | |
122 | int (*vidioc_s_priority) (struct file *file, void *fh, | |
123 | enum v4l2_priority p); | |
124 | ||
125 | /* VIDIOC_ENUM_FMT handlers */ | |
126 | int (*vidioc_enum_fmt_cap) (struct file *file, void *fh, | |
127 | struct v4l2_fmtdesc *f); | |
128 | int (*vidioc_enum_fmt_overlay) (struct file *file, void *fh, | |
129 | struct v4l2_fmtdesc *f); | |
130 | int (*vidioc_enum_fmt_vbi) (struct file *file, void *fh, | |
131 | struct v4l2_fmtdesc *f); | |
132 | int (*vidioc_enum_fmt_vbi_capture) (struct file *file, void *fh, | |
133 | struct v4l2_fmtdesc *f); | |
134 | int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh, | |
135 | struct v4l2_fmtdesc *f); | |
136 | int (*vidioc_enum_fmt_vbi_output) (struct file *file, void *fh, | |
137 | struct v4l2_fmtdesc *f); | |
138 | int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh, | |
139 | struct v4l2_fmtdesc *f); | |
140 | ||
141 | /* VIDIOC_G_FMT handlers */ | |
142 | int (*vidioc_g_fmt_cap) (struct file *file, void *fh, | |
143 | struct v4l2_format *f); | |
144 | int (*vidioc_g_fmt_overlay) (struct file *file, void *fh, | |
145 | struct v4l2_format *f); | |
146 | int (*vidioc_g_fmt_vbi) (struct file *file, void *fh, | |
147 | struct v4l2_format *f); | |
148 | int (*vidioc_g_fmt_vbi_output) (struct file *file, void *fh, | |
149 | struct v4l2_format *f); | |
150 | int (*vidioc_g_fmt_vbi_capture)(struct file *file, void *fh, | |
151 | struct v4l2_format *f); | |
152 | int (*vidioc_g_fmt_video_output)(struct file *file, void *fh, | |
153 | struct v4l2_format *f); | |
154 | int (*vidioc_g_fmt_type_private)(struct file *file, void *fh, | |
155 | struct v4l2_format *f); | |
156 | ||
157 | /* VIDIOC_S_FMT handlers */ | |
158 | int (*vidioc_s_fmt_cap) (struct file *file, void *fh, | |
159 | struct v4l2_format *f); | |
160 | ||
161 | int (*vidioc_s_fmt_overlay) (struct file *file, void *fh, | |
162 | struct v4l2_format *f); | |
163 | int (*vidioc_s_fmt_vbi) (struct file *file, void *fh, | |
164 | struct v4l2_format *f); | |
165 | int (*vidioc_s_fmt_vbi_output) (struct file *file, void *fh, | |
166 | struct v4l2_format *f); | |
167 | int (*vidioc_s_fmt_vbi_capture)(struct file *file, void *fh, | |
168 | struct v4l2_format *f); | |
169 | int (*vidioc_s_fmt_video_output)(struct file *file, void *fh, | |
170 | struct v4l2_format *f); | |
171 | int (*vidioc_s_fmt_type_private)(struct file *file, void *fh, | |
172 | struct v4l2_format *f); | |
173 | ||
174 | /* VIDIOC_TRY_FMT handlers */ | |
175 | int (*vidioc_try_fmt_cap) (struct file *file, void *fh, | |
176 | struct v4l2_format *f); | |
177 | int (*vidioc_try_fmt_overlay) (struct file *file, void *fh, | |
178 | struct v4l2_format *f); | |
179 | int (*vidioc_try_fmt_vbi) (struct file *file, void *fh, | |
180 | struct v4l2_format *f); | |
181 | int (*vidioc_try_fmt_vbi_output) (struct file *file, void *fh, | |
182 | struct v4l2_format *f); | |
183 | int (*vidioc_try_fmt_vbi_capture)(struct file *file, void *fh, | |
184 | struct v4l2_format *f); | |
185 | int (*vidioc_try_fmt_video_output)(struct file *file, void *fh, | |
186 | struct v4l2_format *f); | |
187 | int (*vidioc_try_fmt_type_private)(struct file *file, void *fh, | |
188 | struct v4l2_format *f); | |
189 | ||
190 | /* Buffer handlers */ | |
191 | int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b); | |
192 | int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b); | |
193 | int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b); | |
194 | int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b); | |
195 | ||
196 | ||
197 | int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i); | |
8a905162 | 198 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
401998fa MCC |
199 | /* buffer type is struct vidio_mbuf * */ |
200 | int (*vidiocgmbuf) (struct file *file, void *fh, struct video_mbuf *p); | |
201 | #endif | |
202 | int (*vidioc_g_fbuf) (struct file *file, void *fh, | |
203 | struct v4l2_framebuffer *a); | |
204 | int (*vidioc_s_fbuf) (struct file *file, void *fh, | |
205 | struct v4l2_framebuffer *a); | |
206 | ||
207 | /* Stream on/off */ | |
208 | int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i); | |
209 | int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i); | |
210 | ||
211 | /* Standard handling | |
212 | G_STD and ENUMSTD are handled by videodev.c | |
213 | */ | |
214 | int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id a); | |
215 | int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a); | |
216 | ||
217 | /* Input handling */ | |
218 | int (*vidioc_enum_input)(struct file *file, void *fh, | |
219 | struct v4l2_input *inp); | |
220 | int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i); | |
221 | int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i); | |
222 | ||
223 | /* Output handling */ | |
224 | int (*vidioc_enumoutput) (struct file *file, void *fh, | |
225 | struct v4l2_output *a); | |
226 | int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i); | |
227 | int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i); | |
228 | ||
229 | /* Control handling */ | |
230 | int (*vidioc_queryctrl) (struct file *file, void *fh, | |
231 | struct v4l2_queryctrl *a); | |
232 | int (*vidioc_g_ctrl) (struct file *file, void *fh, | |
233 | struct v4l2_control *a); | |
234 | int (*vidioc_s_ctrl) (struct file *file, void *fh, | |
235 | struct v4l2_control *a); | |
05976914 HV |
236 | int (*vidioc_g_ext_ctrls) (struct file *file, void *fh, |
237 | struct v4l2_ext_controls *a); | |
238 | int (*vidioc_s_ext_ctrls) (struct file *file, void *fh, | |
239 | struct v4l2_ext_controls *a); | |
240 | int (*vidioc_try_ext_ctrls) (struct file *file, void *fh, | |
241 | struct v4l2_ext_controls *a); | |
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242 | int (*vidioc_querymenu) (struct file *file, void *fh, |
243 | struct v4l2_querymenu *a); | |
244 | ||
245 | /* Audio ioctls */ | |
246 | int (*vidioc_enumaudio) (struct file *file, void *fh, | |
247 | struct v4l2_audio *a); | |
248 | int (*vidioc_g_audio) (struct file *file, void *fh, | |
249 | struct v4l2_audio *a); | |
250 | int (*vidioc_s_audio) (struct file *file, void *fh, | |
251 | struct v4l2_audio *a); | |
252 | ||
253 | /* Audio out ioctls */ | |
254 | int (*vidioc_enumaudout) (struct file *file, void *fh, | |
255 | struct v4l2_audioout *a); | |
256 | int (*vidioc_g_audout) (struct file *file, void *fh, | |
257 | struct v4l2_audioout *a); | |
258 | int (*vidioc_s_audout) (struct file *file, void *fh, | |
259 | struct v4l2_audioout *a); | |
260 | int (*vidioc_g_modulator) (struct file *file, void *fh, | |
261 | struct v4l2_modulator *a); | |
262 | int (*vidioc_s_modulator) (struct file *file, void *fh, | |
263 | struct v4l2_modulator *a); | |
264 | /* Crop ioctls */ | |
265 | int (*vidioc_cropcap) (struct file *file, void *fh, | |
266 | struct v4l2_cropcap *a); | |
267 | int (*vidioc_g_crop) (struct file *file, void *fh, | |
268 | struct v4l2_crop *a); | |
269 | int (*vidioc_s_crop) (struct file *file, void *fh, | |
270 | struct v4l2_crop *a); | |
271 | /* Compression ioctls */ | |
272 | int (*vidioc_g_mpegcomp) (struct file *file, void *fh, | |
273 | struct v4l2_mpeg_compression *a); | |
274 | int (*vidioc_s_mpegcomp) (struct file *file, void *fh, | |
275 | struct v4l2_mpeg_compression *a); | |
276 | int (*vidioc_g_jpegcomp) (struct file *file, void *fh, | |
277 | struct v4l2_jpegcompression *a); | |
278 | int (*vidioc_s_jpegcomp) (struct file *file, void *fh, | |
279 | struct v4l2_jpegcompression *a); | |
280 | ||
281 | /* Stream type-dependent parameter ioctls */ | |
282 | int (*vidioc_g_parm) (struct file *file, void *fh, | |
283 | struct v4l2_streamparm *a); | |
284 | int (*vidioc_s_parm) (struct file *file, void *fh, | |
285 | struct v4l2_streamparm *a); | |
286 | ||
287 | /* Tuner ioctls */ | |
288 | int (*vidioc_g_tuner) (struct file *file, void *fh, | |
289 | struct v4l2_tuner *a); | |
290 | int (*vidioc_s_tuner) (struct file *file, void *fh, | |
291 | struct v4l2_tuner *a); | |
292 | int (*vidioc_g_frequency) (struct file *file, void *fh, | |
293 | struct v4l2_frequency *a); | |
294 | int (*vidioc_s_frequency) (struct file *file, void *fh, | |
295 | struct v4l2_frequency *a); | |
296 | ||
297 | /* Sliced VBI cap */ | |
298 | int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh, | |
299 | struct v4l2_sliced_vbi_cap *a); | |
300 | ||
301 | /* Log status ioctl */ | |
302 | int (*vidioc_log_status) (struct file *file, void *fh); | |
303 | ||
304 | ||
5e87efa3 | 305 | #ifdef OBSOLETE_OWNER /* to be removed soon */ |
401998fa MCC |
306 | /* obsolete -- fops->owner is used instead */ |
307 | struct module *owner; | |
308 | /* dev->driver_data will be used instead some day. | |
309 | * Use the video_{get|set}_drvdata() helper functions, | |
310 | * so the switch over will be transparent for you. | |
311 | * Or use {pci|usb}_{get|set}_drvdata() directly. */ | |
312 | void *priv; | |
313 | #endif | |
314 | ||
315 | /* for videodev.c intenal usage -- please don't touch */ | |
316 | int users; /* video_exclusive_{open|close} ... */ | |
317 | struct mutex lock; /* ... helper function uses these */ | |
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318 | struct class_device class_dev; /* sysfs */ |
319 | }; | |
320 | ||
321 | /* Version 2 functions */ | |
322 | extern int video_register_device(struct video_device *vfd, int type, int nr); | |
323 | void video_unregister_device(struct video_device *); | |
324 | extern int video_ioctl2(struct inode *inode, struct file *file, | |
325 | unsigned int cmd, unsigned long arg); | |
326 | ||
327 | /* helper functions to alloc / release struct video_device, the | |
328 | later can be used for video_device->release() */ | |
329 | struct video_device *video_device_alloc(void); | |
330 | void video_device_release(struct video_device *vfd); | |
331 | ||
332 | /* Include support for obsoleted stuff */ | |
333 | extern int video_usercopy(struct inode *inode, struct file *file, | |
334 | unsigned int cmd, unsigned long arg, | |
335 | int (*func)(struct inode *inode, struct file *file, | |
336 | unsigned int cmd, void *arg)); | |
337 | ||
338 | ||
8a905162 | 339 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
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340 | #include <linux/mm.h> |
341 | ||
401998fa | 342 | #define to_video_device(cd) container_of(cd, struct video_device, class_dev) |
8a6914ab | 343 | static inline int __must_check |
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344 | video_device_create_file(struct video_device *vfd, |
345 | struct class_device_attribute *attr) | |
346 | { | |
3117beec MK |
347 | int ret = class_device_create_file(&vfd->class_dev, attr); |
348 | if (ret < 0) | |
349 | printk(KERN_WARNING "%s error: %d\n", __FUNCTION__, ret); | |
350 | return ret; | |
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351 | } |
352 | static inline void | |
353 | video_device_remove_file(struct video_device *vfd, | |
354 | struct class_device_attribute *attr) | |
355 | { | |
356 | class_device_remove_file(&vfd->class_dev, attr); | |
357 | } | |
358 | ||
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359 | #endif /* CONFIG_VIDEO_V4L1_COMPAT */ |
360 | ||
5e87efa3 | 361 | #ifdef OBSOLETE_OWNER /* to be removed soon */ |
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362 | /* helper functions to access driver private data. */ |
363 | static inline void *video_get_drvdata(struct video_device *dev) | |
364 | { | |
365 | return dev->priv; | |
366 | } | |
367 | ||
368 | static inline void video_set_drvdata(struct video_device *dev, void *data) | |
369 | { | |
370 | dev->priv = data; | |
371 | } | |
38ee04f0 | 372 | |
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373 | #endif |
374 | ||
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375 | #ifdef OBSOLETE_DEVDATA /* to be removed soon */ |
376 | /* Obsolete stuff - Still needed for radio devices and obsolete drivers */ | |
377 | extern struct video_device* video_devdata(struct file*); | |
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378 | extern int video_exclusive_open(struct inode *inode, struct file *file); |
379 | extern int video_exclusive_release(struct inode *inode, struct file *file); | |
38ee04f0 | 380 | #endif |
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381 | |
382 | #endif /* _V4L2_DEV_H */ |