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9b5d0f1e SA |
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 | ||
098c645e SA |
33 | /* |
34 | * | |
35 | * The internal V4L2 device interface core. | |
36 | * | |
37 | */ | |
38 | ||
9b5d0f1e SA |
39 | enum v4l2_int_type { |
40 | v4l2_int_type_master = 1, | |
41 | v4l2_int_type_slave | |
42 | }; | |
43 | ||
098c645e SA |
44 | struct v4l2_int_device; |
45 | ||
46 | struct v4l2_int_master { | |
2c94a674 SA |
47 | int (*attach)(struct v4l2_int_device *slave); |
48 | void (*detach)(struct v4l2_int_device *slave); | |
098c645e SA |
49 | }; |
50 | ||
51 | typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *); | |
52 | typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *); | |
53 | typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *); | |
54 | ||
55 | struct v4l2_int_ioctl_desc { | |
56 | int num; | |
57 | v4l2_int_ioctl_func *func; | |
58 | }; | |
59 | ||
60 | struct v4l2_int_slave { | |
61 | /* Don't touch master. */ | |
62 | struct v4l2_int_device *master; | |
63 | ||
64 | char attach_to[V4L2NAMESIZE]; | |
65 | ||
66 | int num_ioctls; | |
67 | struct v4l2_int_ioctl_desc *ioctls; | |
68 | }; | |
69 | ||
70 | struct v4l2_int_device { | |
71 | /* Don't touch head. */ | |
72 | struct list_head head; | |
73 | ||
74 | struct module *module; | |
75 | ||
76 | char name[V4L2NAMESIZE]; | |
77 | ||
78 | enum v4l2_int_type type; | |
79 | union { | |
80 | struct v4l2_int_master *master; | |
81 | struct v4l2_int_slave *slave; | |
82 | } u; | |
83 | ||
84 | void *priv; | |
85 | }; | |
86 | ||
87 | int v4l2_int_device_register(struct v4l2_int_device *d); | |
88 | void v4l2_int_device_unregister(struct v4l2_int_device *d); | |
89 | ||
90 | int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd); | |
91 | int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg); | |
92 | ||
93 | /* | |
94 | * | |
95 | * Types and definitions for IOCTL commands. | |
96 | * | |
97 | */ | |
98 | ||
99 | /* Slave interface type. */ | |
100 | enum v4l2_if_type { | |
08256ea0 SA |
101 | /* |
102 | * Parallel 8-, 10- or 12-bit interface, used by for example | |
103 | * on certain image sensors. | |
104 | */ | |
105 | V4L2_IF_TYPE_BT656, | |
106 | }; | |
107 | ||
108 | enum v4l2_if_type_bt656_mode { | |
109 | /* | |
110 | * Modes without Bt synchronisation codes. Separate | |
111 | * synchronisation signal lines are used. | |
112 | */ | |
113 | V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT, | |
114 | V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT, | |
115 | V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT, | |
116 | /* | |
117 | * Use Bt synchronisation codes. The vertical and horizontal | |
118 | * synchronisation is done based on synchronisation codes. | |
119 | */ | |
120 | V4L2_IF_TYPE_BT656_MODE_BT_8BIT, | |
121 | V4L2_IF_TYPE_BT656_MODE_BT_10BIT, | |
122 | }; | |
123 | ||
124 | struct v4l2_if_type_bt656 { | |
125 | /* | |
126 | * 0: Frame begins when vsync is high. | |
127 | * 1: Frame begins when vsync changes from low to high. | |
128 | */ | |
129 | unsigned frame_start_on_rising_vs:1; | |
130 | /* Use Bt synchronisation codes for sync correction. */ | |
131 | unsigned bt_sync_correct:1; | |
132 | /* Swap every two adjacent image data elements. */ | |
133 | unsigned swap:1; | |
134 | /* Inverted latch clock polarity from slave. */ | |
135 | unsigned latch_clk_inv:1; | |
136 | /* Hs polarity. 0 is active high, 1 active low. */ | |
137 | unsigned nobt_hs_inv:1; | |
138 | /* Vs polarity. 0 is active high, 1 active low. */ | |
139 | unsigned nobt_vs_inv:1; | |
140 | enum v4l2_if_type_bt656_mode mode; | |
141 | /* Minimum accepted bus clock for slave (in Hz). */ | |
142 | u32 clock_min; | |
143 | /* Maximum accepted bus clock for slave. */ | |
144 | u32 clock_max; | |
145 | /* | |
146 | * Current wish of the slave. May only change in response to | |
147 | * ioctls that affect image capture. | |
148 | */ | |
149 | u32 clock_curr; | |
098c645e SA |
150 | }; |
151 | ||
152 | struct v4l2_ifparm { | |
153 | enum v4l2_if_type if_type; | |
154 | union { | |
08256ea0 | 155 | struct v4l2_if_type_bt656 bt656; |
098c645e SA |
156 | } u; |
157 | }; | |
158 | ||
159 | /* IOCTL command numbers. */ | |
9b5d0f1e SA |
160 | enum v4l2_int_ioctl_num { |
161 | /* | |
162 | * | |
163 | * "Proper" V4L ioctls, as in struct video_device. | |
164 | * | |
165 | */ | |
166 | vidioc_int_enum_fmt_cap_num = 1, | |
167 | vidioc_int_g_fmt_cap_num, | |
168 | vidioc_int_s_fmt_cap_num, | |
169 | vidioc_int_try_fmt_cap_num, | |
170 | vidioc_int_queryctrl_num, | |
171 | vidioc_int_g_ctrl_num, | |
172 | vidioc_int_s_ctrl_num, | |
173 | vidioc_int_g_parm_num, | |
174 | vidioc_int_s_parm_num, | |
175 | ||
176 | /* | |
177 | * | |
178 | * Strictly internal ioctls. | |
179 | * | |
180 | */ | |
181 | /* Initialise the device when slave attaches to the master. */ | |
182 | vidioc_int_dev_init_num = 1000, | |
183 | /* Delinitialise the device at slave detach. */ | |
184 | vidioc_int_dev_exit_num, | |
185 | /* Set device power state: 0 is off, non-zero is on. */ | |
186 | vidioc_int_s_power_num, | |
098c645e SA |
187 | /* Get slave interface parameters. */ |
188 | vidioc_int_g_ifparm_num, | |
9b5d0f1e SA |
189 | /* Does the slave need to be reset after VIDIOC_DQBUF? */ |
190 | vidioc_int_g_needs_reset_num, | |
191 | ||
192 | /* | |
193 | * | |
194 | * VIDIOC_INT_* ioctls. | |
195 | * | |
196 | */ | |
197 | /* VIDIOC_INT_RESET */ | |
198 | vidioc_int_reset_num, | |
199 | /* VIDIOC_INT_INIT */ | |
200 | vidioc_int_init_num, | |
201 | /* VIDIOC_INT_G_CHIP_IDENT */ | |
202 | vidioc_int_g_chip_ident_num, | |
203 | ||
204 | /* | |
205 | * | |
206 | * Start of private ioctls. | |
207 | * | |
208 | */ | |
209 | vidioc_int_priv_start_num = 2000, | |
210 | }; | |
211 | ||
9b5d0f1e SA |
212 | /* |
213 | * | |
214 | * IOCTL wrapper functions for better type checking. | |
215 | * | |
216 | */ | |
217 | ||
218 | #define V4L2_INT_WRAPPER_0(name) \ | |
219 | static inline int vidioc_int_##name(struct v4l2_int_device *d) \ | |
220 | { \ | |
221 | return v4l2_int_ioctl_0(d, vidioc_int_##name##_num); \ | |
222 | } \ | |
223 | \ | |
224 | static inline struct v4l2_int_ioctl_desc \ | |
225 | vidioc_int_##name##_cb(int (*func) \ | |
226 | (struct v4l2_int_device *)) \ | |
227 | { \ | |
228 | struct v4l2_int_ioctl_desc desc; \ | |
229 | \ | |
230 | desc.num = vidioc_int_##name##_num; \ | |
231 | desc.func = (v4l2_int_ioctl_func *)func; \ | |
232 | \ | |
233 | return desc; \ | |
234 | } | |
235 | ||
236 | #define V4L2_INT_WRAPPER_1(name, arg_type, asterisk) \ | |
237 | static inline int vidioc_int_##name(struct v4l2_int_device *d, \ | |
238 | arg_type asterisk arg) \ | |
239 | { \ | |
240 | return v4l2_int_ioctl_1(d, vidioc_int_##name##_num, \ | |
63116feb | 241 | (void *)(unsigned long)arg); \ |
9b5d0f1e SA |
242 | } \ |
243 | \ | |
244 | static inline struct v4l2_int_ioctl_desc \ | |
245 | vidioc_int_##name##_cb(int (*func) \ | |
246 | (struct v4l2_int_device *, \ | |
247 | arg_type asterisk)) \ | |
248 | { \ | |
249 | struct v4l2_int_ioctl_desc desc; \ | |
250 | \ | |
251 | desc.num = vidioc_int_##name##_num; \ | |
252 | desc.func = (v4l2_int_ioctl_func *)func; \ | |
253 | \ | |
254 | return desc; \ | |
255 | } | |
256 | ||
257 | V4L2_INT_WRAPPER_1(enum_fmt_cap, struct v4l2_fmtdesc, *); | |
258 | V4L2_INT_WRAPPER_1(g_fmt_cap, struct v4l2_format, *); | |
259 | V4L2_INT_WRAPPER_1(s_fmt_cap, struct v4l2_format, *); | |
260 | V4L2_INT_WRAPPER_1(try_fmt_cap, struct v4l2_format, *); | |
261 | V4L2_INT_WRAPPER_1(queryctrl, struct v4l2_queryctrl, *); | |
262 | V4L2_INT_WRAPPER_1(g_ctrl, struct v4l2_control, *); | |
263 | V4L2_INT_WRAPPER_1(s_ctrl, struct v4l2_control, *); | |
264 | V4L2_INT_WRAPPER_1(g_parm, struct v4l2_streamparm, *); | |
265 | V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *); | |
266 | ||
267 | V4L2_INT_WRAPPER_0(dev_init); | |
268 | V4L2_INT_WRAPPER_0(dev_exit); | |
269 | V4L2_INT_WRAPPER_1(s_power, int, ); | |
098c645e | 270 | V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *); |
9b5d0f1e SA |
271 | V4L2_INT_WRAPPER_1(g_needs_reset, void, *); |
272 | ||
273 | V4L2_INT_WRAPPER_0(reset); | |
274 | V4L2_INT_WRAPPER_0(init); | |
275 | V4L2_INT_WRAPPER_1(g_chip_ident, int, *); | |
276 | ||
277 | #endif |