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1 | /* |
2 | * include/media/v4l2-int-device.h |
3 | * |
4 | * V4L2 internal ioctl interface. |
5 | * |
6 | * Copyright (C) 2007 Nokia Corporation. |
7 | * |
8 | * Contact: Sakari Ailus <sakari.ailus@nokia.com> |
9 | * |
10 | * This program is free software; you can redistribute it and/or |
11 | * modify it under the terms of the GNU General Public License |
12 | * version 2 as published by the Free Software Foundation. |
13 | * |
14 | * This program is distributed in the hope that it will be useful, but |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | * General Public License for more details. |
18 | * |
19 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
22 | * 02110-1301 USA |
23 | */ |
24 | |
25 | #ifndef V4L2_INT_DEVICE_H |
26 | #define V4L2_INT_DEVICE_H |
27 | |
28 | #include <media/v4l2-common.h> |
29 | |
30 | #define V4L2NAMESIZE 32 |
31 | |
32 | /* |
33 | * |
34 | * The internal V4L2 device interface core. |
35 | * |
36 | */ |
37 | |
38 | enum v4l2_int_type { |
39 | v4l2_int_type_master = 1, |
40 | v4l2_int_type_slave |
41 | }; |
42 | |
43 | struct module; |
44 | |
45 | struct v4l2_int_device; |
46 | |
47 | struct v4l2_int_master { |
48 | int (*attach)(struct v4l2_int_device *slave); |
49 | void (*detach)(struct v4l2_int_device *slave); |
50 | }; |
51 | |
52 | typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *); |
53 | typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *); |
54 | typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *); |
55 | |
56 | struct v4l2_int_ioctl_desc { |
57 | int num; |
58 | v4l2_int_ioctl_func *func; |
59 | }; |
60 | |
61 | struct v4l2_int_slave { |
62 | /* Don't touch master. */ |
63 | struct v4l2_int_device *master; |
64 | |
65 | char attach_to[V4L2NAMESIZE]; |
66 | |
67 | int num_ioctls; |
68 | struct v4l2_int_ioctl_desc *ioctls; |
69 | }; |
70 | |
71 | struct v4l2_int_device { |
72 | /* Don't touch head. */ |
73 | struct list_head head; |
74 | |
75 | struct module *module; |
76 | |
77 | char name[V4L2NAMESIZE]; |
78 | |
79 | enum v4l2_int_type type; |
80 | union { |
81 | struct v4l2_int_master *master; |
82 | struct v4l2_int_slave *slave; |
83 | } u; |
84 | |
85 | void *priv; |
86 | }; |
87 | |
88 | void v4l2_int_device_try_attach_all(void); |
89 | |
90 | int v4l2_int_device_register(struct v4l2_int_device *d); |
91 | void v4l2_int_device_unregister(struct v4l2_int_device *d); |
92 | |
93 | int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd); |
94 | int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg); |
95 | |
96 | /* |
97 | * |
98 | * Types and definitions for IOCTL commands. |
99 | * |
100 | */ |
101 | |
102 | enum v4l2_power { |
103 | V4L2_POWER_OFF = 0, |
104 | V4L2_POWER_ON, |
105 | V4L2_POWER_STANDBY, |
106 | }; |
107 | |
108 | /* Slave interface type. */ |
109 | enum v4l2_if_type { |
110 | /* |
111 | * Parallel 8-, 10- or 12-bit interface, used by for example |
112 | * on certain image sensors. |
113 | */ |
114 | V4L2_IF_TYPE_BT656, |
115 | }; |
116 | |
117 | enum v4l2_if_type_bt656_mode { |
118 | /* |
119 | * Modes without Bt synchronisation codes. Separate |
120 | * synchronisation signal lines are used. |
121 | */ |
122 | V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT, |
123 | V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT, |
124 | V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT, |
125 | /* |
126 | * Use Bt synchronisation codes. The vertical and horizontal |
127 | * synchronisation is done based on synchronisation codes. |
128 | */ |
129 | V4L2_IF_TYPE_BT656_MODE_BT_8BIT, |
130 | V4L2_IF_TYPE_BT656_MODE_BT_10BIT, |
131 | }; |
132 | |
133 | struct v4l2_if_type_bt656 { |
134 | /* |
135 | * 0: Frame begins when vsync is high. |
136 | * 1: Frame begins when vsync changes from low to high. |
137 | */ |
138 | unsigned frame_start_on_rising_vs:1; |
139 | /* Use Bt synchronisation codes for sync correction. */ |
140 | unsigned bt_sync_correct:1; |
141 | /* Swap every two adjacent image data elements. */ |
142 | unsigned swap:1; |
143 | /* Inverted latch clock polarity from slave. */ |
144 | unsigned latch_clk_inv:1; |
145 | /* Hs polarity. 0 is active high, 1 active low. */ |
146 | unsigned nobt_hs_inv:1; |
147 | /* Vs polarity. 0 is active high, 1 active low. */ |
148 | unsigned nobt_vs_inv:1; |
149 | enum v4l2_if_type_bt656_mode mode; |
150 | /* Minimum accepted bus clock for slave (in Hz). */ |
151 | u32 clock_min; |
152 | /* Maximum accepted bus clock for slave. */ |
153 | u32 clock_max; |
154 | /* |
155 | * Current wish of the slave. May only change in response to |
156 | * ioctls that affect image capture. |
157 | */ |
158 | u32 clock_curr; |
159 | }; |
160 | |
161 | struct v4l2_ifparm { |
162 | enum v4l2_if_type if_type; |
163 | union { |
164 | struct v4l2_if_type_bt656 bt656; |
165 | } u; |
166 | }; |
167 | |
168 | /* IOCTL command numbers. */ |
169 | enum v4l2_int_ioctl_num { |
170 | /* |
171 | * |
172 | * "Proper" V4L ioctls, as in struct video_device. |
173 | * |
174 | */ |
175 | vidioc_int_enum_fmt_cap_num = 1, |
176 | vidioc_int_g_fmt_cap_num, |
177 | vidioc_int_s_fmt_cap_num, |
178 | vidioc_int_try_fmt_cap_num, |
179 | vidioc_int_queryctrl_num, |
180 | vidioc_int_g_ctrl_num, |
181 | vidioc_int_s_ctrl_num, |
182 | vidioc_int_cropcap_num, |
183 | vidioc_int_g_crop_num, |
184 | vidioc_int_s_crop_num, |
185 | vidioc_int_g_parm_num, |
186 | vidioc_int_s_parm_num, |
187 | vidioc_int_querystd_num, |
188 | vidioc_int_s_std_num, |
189 | vidioc_int_s_video_routing_num, |
190 | |
191 | /* |
192 | * |
193 | * Strictly internal ioctls. |
194 | * |
195 | */ |
196 | /* Initialise the device when slave attaches to the master. */ |
197 | vidioc_int_dev_init_num = 1000, |
198 | /* Delinitialise the device at slave detach. */ |
199 | vidioc_int_dev_exit_num, |
200 | /* Set device power state. */ |
201 | vidioc_int_s_power_num, |
202 | /* |
203 | * Get slave private data, e.g. platform-specific slave |
204 | * configuration used by the master. |
205 | */ |
206 | vidioc_int_g_priv_num, |
207 | /* Get slave interface parameters. */ |
208 | vidioc_int_g_ifparm_num, |
209 | /* Does the slave need to be reset after VIDIOC_DQBUF? */ |
210 | vidioc_int_g_needs_reset_num, |
211 | vidioc_int_enum_framesizes_num, |
212 | vidioc_int_enum_frameintervals_num, |
213 | |
214 | /* |
215 | * |
216 | * VIDIOC_INT_* ioctls. |
217 | * |
218 | */ |
219 | /* VIDIOC_INT_RESET */ |
220 | vidioc_int_reset_num, |
221 | /* VIDIOC_INT_INIT */ |
222 | vidioc_int_init_num, |
223 | /* VIDIOC_DBG_G_CHIP_IDENT */ |
224 | vidioc_int_g_chip_ident_num, |
225 | |
226 | /* |
227 | * |
228 | * Start of private ioctls. |
229 | * |
230 | */ |
231 | vidioc_int_priv_start_num = 2000, |
232 | }; |
233 | |
234 | /* |
235 | * |
236 | * IOCTL wrapper functions for better type checking. |
237 | * |
238 | */ |
239 | |
240 | #define V4L2_INT_WRAPPER_0(name) \ |
241 | static inline int vidioc_int_##name(struct v4l2_int_device *d) \ |
242 | { \ |
243 | return v4l2_int_ioctl_0(d, vidioc_int_##name##_num); \ |
244 | } \ |
245 | \ |
246 | static inline struct v4l2_int_ioctl_desc \ |
247 | vidioc_int_##name##_cb(int (*func) \ |
248 | (struct v4l2_int_device *)) \ |
249 | { \ |
250 | struct v4l2_int_ioctl_desc desc; \ |
251 | \ |
252 | desc.num = vidioc_int_##name##_num; \ |
253 | desc.func = (v4l2_int_ioctl_func *)func; \ |
254 | \ |
255 | return desc; \ |
256 | } |
257 | |
258 | #define V4L2_INT_WRAPPER_1(name, arg_type, asterisk) \ |
259 | static inline int vidioc_int_##name(struct v4l2_int_device *d, \ |
260 | arg_type asterisk arg) \ |
261 | { \ |
262 | return v4l2_int_ioctl_1(d, vidioc_int_##name##_num, \ |
263 | (void *)(unsigned long)arg); \ |
264 | } \ |
265 | \ |
266 | static inline struct v4l2_int_ioctl_desc \ |
267 | vidioc_int_##name##_cb(int (*func) \ |
268 | (struct v4l2_int_device *, \ |
269 | arg_type asterisk)) \ |
270 | { \ |
271 | struct v4l2_int_ioctl_desc desc; \ |
272 | \ |
273 | desc.num = vidioc_int_##name##_num; \ |
274 | desc.func = (v4l2_int_ioctl_func *)func; \ |
275 | \ |
276 | return desc; \ |
277 | } |
278 | |
279 | V4L2_INT_WRAPPER_1(enum_fmt_cap, struct v4l2_fmtdesc, *); |
280 | V4L2_INT_WRAPPER_1(g_fmt_cap, struct v4l2_format, *); |
281 | V4L2_INT_WRAPPER_1(s_fmt_cap, struct v4l2_format, *); |
282 | V4L2_INT_WRAPPER_1(try_fmt_cap, struct v4l2_format, *); |
283 | V4L2_INT_WRAPPER_1(queryctrl, struct v4l2_queryctrl, *); |
284 | V4L2_INT_WRAPPER_1(g_ctrl, struct v4l2_control, *); |
285 | V4L2_INT_WRAPPER_1(s_ctrl, struct v4l2_control, *); |
286 | V4L2_INT_WRAPPER_1(cropcap, struct v4l2_cropcap, *); |
287 | V4L2_INT_WRAPPER_1(g_crop, struct v4l2_crop, *); |
288 | V4L2_INT_WRAPPER_1(s_crop, struct v4l2_crop, *); |
289 | V4L2_INT_WRAPPER_1(g_parm, struct v4l2_streamparm, *); |
290 | V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *); |
291 | V4L2_INT_WRAPPER_1(querystd, v4l2_std_id, *); |
292 | V4L2_INT_WRAPPER_1(s_std, v4l2_std_id, *); |
293 | V4L2_INT_WRAPPER_1(s_video_routing, struct v4l2_routing, *); |
294 | |
295 | V4L2_INT_WRAPPER_0(dev_init); |
296 | V4L2_INT_WRAPPER_0(dev_exit); |
297 | V4L2_INT_WRAPPER_1(s_power, enum v4l2_power, ); |
298 | V4L2_INT_WRAPPER_1(g_priv, void, *); |
299 | V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *); |
300 | V4L2_INT_WRAPPER_1(g_needs_reset, void, *); |
301 | V4L2_INT_WRAPPER_1(enum_framesizes, struct v4l2_frmsizeenum, *); |
302 | V4L2_INT_WRAPPER_1(enum_frameintervals, struct v4l2_frmivalenum, *); |
303 | |
304 | V4L2_INT_WRAPPER_0(reset); |
305 | V4L2_INT_WRAPPER_0(init); |
306 | V4L2_INT_WRAPPER_1(g_chip_ident, int, *); |
307 | |
308 | #endif |
309 |
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