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diff --git a/include/media/v4l2-int-device.h b/include/media/v4l2-int-device.h
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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 <linux/module.h>
29#include <media/v4l2-common.h>
30
31#define V4L2NAMESIZE 32
32
33/*
34 *
35 * The internal V4L2 device interface core.
36 *
37 */
38
39enum v4l2_int_type {
40 v4l2_int_type_master = 1,
41 v4l2_int_type_slave
42};
43
44struct v4l2_int_device;
45
46struct v4l2_int_master {
47 int (*attach)(struct v4l2_int_device *master,
48 struct v4l2_int_device *slave);
49 void (*detach)(struct v4l2_int_device *master);
50};
51
52typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *);
53typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *);
54typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *);
55
56struct v4l2_int_ioctl_desc {
57 int num;
58 v4l2_int_ioctl_func *func;
59};
60
61struct 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
71struct 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
88int v4l2_int_device_register(struct v4l2_int_device *d);
89void v4l2_int_device_unregister(struct v4l2_int_device *d);
90
91int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd);
92int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg);
93
94/*
95 *
96 * Types and definitions for IOCTL commands.
97 *
98 */
99
100/* Slave interface type. */
101enum v4l2_if_type {
102 /*
103 * Parallel 8-, 10- or 12-bit interface, used by for example
104 * on certain image sensors.
105 */
106 V4L2_IF_TYPE_BT656,
107};
108
109enum v4l2_if_type_bt656_mode {
110 /*
111 * Modes without Bt synchronisation codes. Separate
112 * synchronisation signal lines are used.
113 */
114 V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT,
115 V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT,
116 V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT,
117 /*
118 * Use Bt synchronisation codes. The vertical and horizontal
119 * synchronisation is done based on synchronisation codes.
120 */
121 V4L2_IF_TYPE_BT656_MODE_BT_8BIT,
122 V4L2_IF_TYPE_BT656_MODE_BT_10BIT,
123};
124
125struct v4l2_if_type_bt656 {
126 /*
127 * 0: Frame begins when vsync is high.
128 * 1: Frame begins when vsync changes from low to high.
129 */
130 unsigned frame_start_on_rising_vs:1;
131 /* Use Bt synchronisation codes for sync correction. */
132 unsigned bt_sync_correct:1;
133 /* Swap every two adjacent image data elements. */
134 unsigned swap:1;
135 /* Inverted latch clock polarity from slave. */
136 unsigned latch_clk_inv:1;
137 /* Hs polarity. 0 is active high, 1 active low. */
138 unsigned nobt_hs_inv:1;
139 /* Vs polarity. 0 is active high, 1 active low. */
140 unsigned nobt_vs_inv:1;
141 enum v4l2_if_type_bt656_mode mode;
142 /* Minimum accepted bus clock for slave (in Hz). */
143 u32 clock_min;
144 /* Maximum accepted bus clock for slave. */
145 u32 clock_max;
146 /*
147 * Current wish of the slave. May only change in response to
148 * ioctls that affect image capture.
149 */
150 u32 clock_curr;
151};
152
153struct v4l2_ifparm {
154 enum v4l2_if_type if_type;
155 union {
156 struct v4l2_if_type_bt656 bt656;
157 } u;
158};
159
160/* IOCTL command numbers. */
161enum v4l2_int_ioctl_num {
162 /*
163 *
164 * "Proper" V4L ioctls, as in struct video_device.
165 *
166 */
167 vidioc_int_enum_fmt_cap_num = 1,
168 vidioc_int_g_fmt_cap_num,
169 vidioc_int_s_fmt_cap_num,
170 vidioc_int_try_fmt_cap_num,
171 vidioc_int_queryctrl_num,
172 vidioc_int_g_ctrl_num,
173 vidioc_int_s_ctrl_num,
174 vidioc_int_g_parm_num,
175 vidioc_int_s_parm_num,
176
177 /*
178 *
179 * Strictly internal ioctls.
180 *
181 */
182 /* Initialise the device when slave attaches to the master. */
183 vidioc_int_dev_init_num = 1000,
184 /* Delinitialise the device at slave detach. */
185 vidioc_int_dev_exit_num,
186 /* Set device power state: 0 is off, non-zero is on. */
187 vidioc_int_s_power_num,
188 /* Get slave interface parameters. */
189 vidioc_int_g_ifparm_num,
190 /* Does the slave need to be reset after VIDIOC_DQBUF? */
191 vidioc_int_g_needs_reset_num,
192
193 /*
194 *
195 * VIDIOC_INT_* ioctls.
196 *
197 */
198 /* VIDIOC_INT_RESET */
199 vidioc_int_reset_num,
200 /* VIDIOC_INT_INIT */
201 vidioc_int_init_num,
202 /* VIDIOC_INT_G_CHIP_IDENT */
203 vidioc_int_g_chip_ident_num,
204
205 /*
206 *
207 * Start of private ioctls.
208 *
209 */
210 vidioc_int_priv_start_num = 2000,
211};
212
213/*
214 *
215 * IOCTL wrapper functions for better type checking.
216 *
217 */
218
219#define V4L2_INT_WRAPPER_0(name) \
220 static inline int vidioc_int_##name(struct v4l2_int_device *d) \
221 { \
222 return v4l2_int_ioctl_0(d, vidioc_int_##name##_num); \
223 } \
224 \
225 static inline struct v4l2_int_ioctl_desc \
226 vidioc_int_##name##_cb(int (*func) \
227 (struct v4l2_int_device *)) \
228 { \
229 struct v4l2_int_ioctl_desc desc; \
230 \
231 desc.num = vidioc_int_##name##_num; \
232 desc.func = (v4l2_int_ioctl_func *)func; \
233 \
234 return desc; \
235 }
236
237#define V4L2_INT_WRAPPER_1(name, arg_type, asterisk) \
238 static inline int vidioc_int_##name(struct v4l2_int_device *d, \
239 arg_type asterisk arg) \
240 { \
241 return v4l2_int_ioctl_1(d, vidioc_int_##name##_num, \
242 (void *)(unsigned long)arg); \
243 } \
244 \
245 static inline struct v4l2_int_ioctl_desc \
246 vidioc_int_##name##_cb(int (*func) \
247 (struct v4l2_int_device *, \
248 arg_type asterisk)) \
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
258V4L2_INT_WRAPPER_1(enum_fmt_cap, struct v4l2_fmtdesc, *);
259V4L2_INT_WRAPPER_1(g_fmt_cap, struct v4l2_format, *);
260V4L2_INT_WRAPPER_1(s_fmt_cap, struct v4l2_format, *);
261V4L2_INT_WRAPPER_1(try_fmt_cap, struct v4l2_format, *);
262V4L2_INT_WRAPPER_1(queryctrl, struct v4l2_queryctrl, *);
263V4L2_INT_WRAPPER_1(g_ctrl, struct v4l2_control, *);
264V4L2_INT_WRAPPER_1(s_ctrl, struct v4l2_control, *);
265V4L2_INT_WRAPPER_1(g_parm, struct v4l2_streamparm, *);
266V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *);
267
268V4L2_INT_WRAPPER_0(dev_init);
269V4L2_INT_WRAPPER_0(dev_exit);
270V4L2_INT_WRAPPER_1(s_power, int, );
271V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *);
272V4L2_INT_WRAPPER_1(g_needs_reset, void, *);
273
274V4L2_INT_WRAPPER_0(reset);
275V4L2_INT_WRAPPER_0(init);
276V4L2_INT_WRAPPER_1(g_chip_ident, int, *);
277
278#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-03 23:33:48 -0500