2 * include/media/v4l2-int-device.h
4 * V4L2 internal ioctl interface.
6 * Copyright (C) 2007 Nokia Corporation.
8 * Contact: Sakari Ailus <sakari.ailus@nokia.com>
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.
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.
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
25 #ifndef V4L2_INT_DEVICE_H
26 #define V4L2_INT_DEVICE_H
28 #include <linux/module.h>
29 #include <media/v4l2-common.h>
31 #define V4L2NAMESIZE 32
35 * The internal V4L2 device interface core.
40 v4l2_int_type_master = 1,
44 struct v4l2_int_device;
46 struct 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);
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 *);
56 struct v4l2_int_ioctl_desc {
58 v4l2_int_ioctl_func *func;
61 struct v4l2_int_slave {
62 /* Don't touch master. */
63 struct v4l2_int_device *master;
65 char attach_to[V4L2NAMESIZE];
68 struct v4l2_int_ioctl_desc *ioctls;
71 struct v4l2_int_device {
72 /* Don't touch head. */
73 struct list_head head;
75 struct module *module;
77 char name[V4L2NAMESIZE];
79 enum v4l2_int_type type;
81 struct v4l2_int_master *master;
82 struct v4l2_int_slave *slave;
88 int v4l2_int_device_register(struct v4l2_int_device *d);
89 void v4l2_int_device_unregister(struct v4l2_int_device *d);
91 int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd);
92 int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg);
96 * Types and definitions for IOCTL commands.
100 /* Slave interface type. */
103 * Parallel 8-, 10- or 12-bit interface, used by for example
104 * on certain image sensors.
109 enum v4l2_if_type_bt656_mode {
111 * Modes without Bt synchronisation codes. Separate
112 * synchronisation signal lines are used.
114 V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT,
115 V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT,
116 V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT,
118 * Use Bt synchronisation codes. The vertical and horizontal
119 * synchronisation is done based on synchronisation codes.
121 V4L2_IF_TYPE_BT656_MODE_BT_8BIT,
122 V4L2_IF_TYPE_BT656_MODE_BT_10BIT,
125 struct v4l2_if_type_bt656 {
127 * 0: Frame begins when vsync is high.
128 * 1: Frame begins when vsync changes from low to high.
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. */
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). */
144 /* Maximum accepted bus clock for slave. */
147 * Current wish of the slave. May only change in response to
148 * ioctls that affect image capture.
154 enum v4l2_if_type if_type;
156 struct v4l2_if_type_bt656 bt656;
160 /* IOCTL command numbers. */
161 enum v4l2_int_ioctl_num {
164 * "Proper" V4L ioctls, as in struct video_device.
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,
179 * Strictly internal ioctls.
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 /* Get external clock speed for current slave settings. */
191 vidioc_int_g_ext_clk_num,
193 * Tell what the generated interface clock speed actually is.
195 vidioc_int_s_ext_clk_num,
196 /* Does the slave need to be reset after VIDIOC_DQBUF? */
197 vidioc_int_g_needs_reset_num,
201 * VIDIOC_INT_* ioctls.
204 /* VIDIOC_INT_RESET */
205 vidioc_int_reset_num,
206 /* VIDIOC_INT_INIT */
208 /* VIDIOC_INT_G_CHIP_IDENT */
209 vidioc_int_g_chip_ident_num,
213 * Start of private ioctls.
216 vidioc_int_priv_start_num = 2000,
221 * IOCTL wrapper functions for better type checking.
225 #define V4L2_INT_WRAPPER_0(name) \
226 static inline int vidioc_int_##name(struct v4l2_int_device *d) \
228 return v4l2_int_ioctl_0(d, vidioc_int_##name##_num); \
231 static inline struct v4l2_int_ioctl_desc \
232 vidioc_int_##name##_cb(int (*func) \
233 (struct v4l2_int_device *)) \
235 struct v4l2_int_ioctl_desc desc; \
237 desc.num = vidioc_int_##name##_num; \
238 desc.func = (v4l2_int_ioctl_func *)func; \
243 #define V4L2_INT_WRAPPER_1(name, arg_type, asterisk) \
244 static inline int vidioc_int_##name(struct v4l2_int_device *d, \
245 arg_type asterisk arg) \
247 return v4l2_int_ioctl_1(d, vidioc_int_##name##_num, \
248 (void *)(unsigned long)arg); \
251 static inline struct v4l2_int_ioctl_desc \
252 vidioc_int_##name##_cb(int (*func) \
253 (struct v4l2_int_device *, \
254 arg_type asterisk)) \
256 struct v4l2_int_ioctl_desc desc; \
258 desc.num = vidioc_int_##name##_num; \
259 desc.func = (v4l2_int_ioctl_func *)func; \
264 V4L2_INT_WRAPPER_1(enum_fmt_cap, struct v4l2_fmtdesc, *);
265 V4L2_INT_WRAPPER_1(g_fmt_cap, struct v4l2_format, *);
266 V4L2_INT_WRAPPER_1(s_fmt_cap, struct v4l2_format, *);
267 V4L2_INT_WRAPPER_1(try_fmt_cap, struct v4l2_format, *);
268 V4L2_INT_WRAPPER_1(queryctrl, struct v4l2_queryctrl, *);
269 V4L2_INT_WRAPPER_1(g_ctrl, struct v4l2_control, *);
270 V4L2_INT_WRAPPER_1(s_ctrl, struct v4l2_control, *);
271 V4L2_INT_WRAPPER_1(g_parm, struct v4l2_streamparm, *);
272 V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *);
274 V4L2_INT_WRAPPER_0(dev_init);
275 V4L2_INT_WRAPPER_0(dev_exit);
276 V4L2_INT_WRAPPER_1(s_power, int, );
277 V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *);
278 V4L2_INT_WRAPPER_1(s_ext_clk, u32, );
279 V4L2_INT_WRAPPER_1(g_ext_clk, u32, *);
280 V4L2_INT_WRAPPER_1(g_needs_reset, void, *);
282 V4L2_INT_WRAPPER_0(reset);
283 V4L2_INT_WRAPPER_0(init);
284 V4L2_INT_WRAPPER_1(g_chip_ident, int, *);