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Sakari Ailus9b5d0f12007-07-18 17:59:15 -03001/*
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
Sakari Ailus098c6452007-08-30 09:20:38 -030033/*
34 *
35 * The internal V4L2 device interface core.
36 *
37 */
38
Sakari Ailus9b5d0f12007-07-18 17:59:15 -030039enum v4l2_int_type {
40 v4l2_int_type_master = 1,
41 v4l2_int_type_slave
42};
43
Sakari Ailus9b5d0f12007-07-18 17:59:15 -030044struct v4l2_int_device;
45
46struct v4l2_int_master {
Sakari Ailus2c94a672007-10-30 05:52:52 -030047 int (*attach)(struct v4l2_int_device *slave);
48 void (*detach)(struct v4l2_int_device *slave);
Sakari Ailus9b5d0f12007-07-18 17:59:15 -030049};
50
51typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *);
52typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *);
53typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *);
54
55struct v4l2_int_ioctl_desc {
56 int num;
57 v4l2_int_ioctl_func *func;
58};
59
60struct 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
70struct 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
Sakari Ailus36499e52008-10-18 12:28:36 -030087void v4l2_int_device_try_attach_all(void);
88
Sakari Ailus9b5d0f12007-07-18 17:59:15 -030089int v4l2_int_device_register(struct v4l2_int_device *d);
90void v4l2_int_device_unregister(struct v4l2_int_device *d);
91
92int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd);
93int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg);
94
95/*
96 *
Sakari Ailus098c6452007-08-30 09:20:38 -030097 * Types and definitions for IOCTL commands.
98 *
99 */
100
Sakari Ailus84389912008-10-18 12:27:50 -0300101enum v4l2_power {
102 V4L2_POWER_OFF = 0,
103 V4L2_POWER_ON,
104 V4L2_POWER_STANDBY,
105};
106
Sakari Ailus098c6452007-08-30 09:20:38 -0300107/* Slave interface type. */
108enum v4l2_if_type {
Sakari Ailus08256ea2007-08-30 09:20:39 -0300109 /*
110 * Parallel 8-, 10- or 12-bit interface, used by for example
111 * on certain image sensors.
112 */
113 V4L2_IF_TYPE_BT656,
114};
115
116enum v4l2_if_type_bt656_mode {
117 /*
118 * Modes without Bt synchronisation codes. Separate
119 * synchronisation signal lines are used.
120 */
121 V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT,
122 V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT,
123 V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT,
124 /*
125 * Use Bt synchronisation codes. The vertical and horizontal
126 * synchronisation is done based on synchronisation codes.
127 */
128 V4L2_IF_TYPE_BT656_MODE_BT_8BIT,
129 V4L2_IF_TYPE_BT656_MODE_BT_10BIT,
130};
131
132struct v4l2_if_type_bt656 {
133 /*
134 * 0: Frame begins when vsync is high.
135 * 1: Frame begins when vsync changes from low to high.
136 */
137 unsigned frame_start_on_rising_vs:1;
138 /* Use Bt synchronisation codes for sync correction. */
139 unsigned bt_sync_correct:1;
140 /* Swap every two adjacent image data elements. */
141 unsigned swap:1;
142 /* Inverted latch clock polarity from slave. */
143 unsigned latch_clk_inv:1;
144 /* Hs polarity. 0 is active high, 1 active low. */
145 unsigned nobt_hs_inv:1;
146 /* Vs polarity. 0 is active high, 1 active low. */
147 unsigned nobt_vs_inv:1;
148 enum v4l2_if_type_bt656_mode mode;
149 /* Minimum accepted bus clock for slave (in Hz). */
150 u32 clock_min;
151 /* Maximum accepted bus clock for slave. */
152 u32 clock_max;
153 /*
154 * Current wish of the slave. May only change in response to
155 * ioctls that affect image capture.
156 */
157 u32 clock_curr;
Sakari Ailus098c6452007-08-30 09:20:38 -0300158};
159
160struct v4l2_ifparm {
161 enum v4l2_if_type if_type;
162 union {
Sakari Ailus08256ea2007-08-30 09:20:39 -0300163 struct v4l2_if_type_bt656 bt656;
Sakari Ailus098c6452007-08-30 09:20:38 -0300164 } u;
165};
166
167/* IOCTL command numbers. */
168enum v4l2_int_ioctl_num {
169 /*
170 *
171 * "Proper" V4L ioctls, as in struct video_device.
172 *
173 */
174 vidioc_int_enum_fmt_cap_num = 1,
175 vidioc_int_g_fmt_cap_num,
176 vidioc_int_s_fmt_cap_num,
177 vidioc_int_try_fmt_cap_num,
178 vidioc_int_queryctrl_num,
179 vidioc_int_g_ctrl_num,
180 vidioc_int_s_ctrl_num,
Sameer Venkatraman621a3732008-10-18 12:25:28 -0300181 vidioc_int_cropcap_num,
182 vidioc_int_g_crop_num,
183 vidioc_int_s_crop_num,
Sakari Ailus098c6452007-08-30 09:20:38 -0300184 vidioc_int_g_parm_num,
185 vidioc_int_s_parm_num,
186
187 /*
188 *
189 * Strictly internal ioctls.
190 *
191 */
192 /* Initialise the device when slave attaches to the master. */
193 vidioc_int_dev_init_num = 1000,
194 /* Delinitialise the device at slave detach. */
195 vidioc_int_dev_exit_num,
Sakari Ailus84389912008-10-18 12:27:50 -0300196 /* Set device power state. */
Sakari Ailus098c6452007-08-30 09:20:38 -0300197 vidioc_int_s_power_num,
Sakari Ailus96014a92008-10-18 12:23:45 -0300198 /*
199 * Get slave private data, e.g. platform-specific slave
200 * configuration used by the master.
201 */
202 vidioc_int_g_priv_num,
Sakari Ailus098c6452007-08-30 09:20:38 -0300203 /* Get slave interface parameters. */
204 vidioc_int_g_ifparm_num,
Sakari Ailus098c6452007-08-30 09:20:38 -0300205 /* Does the slave need to be reset after VIDIOC_DQBUF? */
206 vidioc_int_g_needs_reset_num,
Sakari Ailusf496bc72008-10-18 12:29:15 -0300207 vidioc_int_enum_framesizes_num,
208 vidioc_int_enum_frameintervals_num,
Sakari Ailus098c6452007-08-30 09:20:38 -0300209
210 /*
211 *
212 * VIDIOC_INT_* ioctls.
213 *
214 */
215 /* VIDIOC_INT_RESET */
216 vidioc_int_reset_num,
217 /* VIDIOC_INT_INIT */
218 vidioc_int_init_num,
219 /* VIDIOC_INT_G_CHIP_IDENT */
220 vidioc_int_g_chip_ident_num,
221
222 /*
223 *
224 * Start of private ioctls.
225 *
226 */
227 vidioc_int_priv_start_num = 2000,
228};
229
230/*
231 *
Sakari Ailus9b5d0f12007-07-18 17:59:15 -0300232 * IOCTL wrapper functions for better type checking.
233 *
234 */
235
236#define V4L2_INT_WRAPPER_0(name) \
237 static inline int vidioc_int_##name(struct v4l2_int_device *d) \
238 { \
239 return v4l2_int_ioctl_0(d, vidioc_int_##name##_num); \
240 } \
241 \
242 static inline struct v4l2_int_ioctl_desc \
243 vidioc_int_##name##_cb(int (*func) \
244 (struct v4l2_int_device *)) \
245 { \
246 struct v4l2_int_ioctl_desc desc; \
247 \
248 desc.num = vidioc_int_##name##_num; \
249 desc.func = (v4l2_int_ioctl_func *)func; \
250 \
251 return desc; \
252 }
253
254#define V4L2_INT_WRAPPER_1(name, arg_type, asterisk) \
255 static inline int vidioc_int_##name(struct v4l2_int_device *d, \
256 arg_type asterisk arg) \
257 { \
258 return v4l2_int_ioctl_1(d, vidioc_int_##name##_num, \
Sakari Ailus63116fe2007-07-20 13:12:51 -0300259 (void *)(unsigned long)arg); \
Sakari Ailus9b5d0f12007-07-18 17:59:15 -0300260 } \
261 \
262 static inline struct v4l2_int_ioctl_desc \
263 vidioc_int_##name##_cb(int (*func) \
264 (struct v4l2_int_device *, \
265 arg_type asterisk)) \
266 { \
267 struct v4l2_int_ioctl_desc desc; \
268 \
269 desc.num = vidioc_int_##name##_num; \
270 desc.func = (v4l2_int_ioctl_func *)func; \
271 \
272 return desc; \
273 }
274
275V4L2_INT_WRAPPER_1(enum_fmt_cap, struct v4l2_fmtdesc, *);
276V4L2_INT_WRAPPER_1(g_fmt_cap, struct v4l2_format, *);
277V4L2_INT_WRAPPER_1(s_fmt_cap, struct v4l2_format, *);
278V4L2_INT_WRAPPER_1(try_fmt_cap, struct v4l2_format, *);
279V4L2_INT_WRAPPER_1(queryctrl, struct v4l2_queryctrl, *);
280V4L2_INT_WRAPPER_1(g_ctrl, struct v4l2_control, *);
281V4L2_INT_WRAPPER_1(s_ctrl, struct v4l2_control, *);
Sameer Venkatraman621a3732008-10-18 12:25:28 -0300282V4L2_INT_WRAPPER_1(cropcap, struct v4l2_cropcap, *);
283V4L2_INT_WRAPPER_1(g_crop, struct v4l2_crop, *);
284V4L2_INT_WRAPPER_1(s_crop, struct v4l2_crop, *);
Sakari Ailus9b5d0f12007-07-18 17:59:15 -0300285V4L2_INT_WRAPPER_1(g_parm, struct v4l2_streamparm, *);
286V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *);
287
288V4L2_INT_WRAPPER_0(dev_init);
289V4L2_INT_WRAPPER_0(dev_exit);
Sakari Ailus84389912008-10-18 12:27:50 -0300290V4L2_INT_WRAPPER_1(s_power, enum v4l2_power, );
Sakari Ailus96014a92008-10-18 12:23:45 -0300291V4L2_INT_WRAPPER_1(g_priv, void, *);
Sakari Ailus098c6452007-08-30 09:20:38 -0300292V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *);
Sakari Ailus9b5d0f12007-07-18 17:59:15 -0300293V4L2_INT_WRAPPER_1(g_needs_reset, void, *);
Sakari Ailusf496bc72008-10-18 12:29:15 -0300294V4L2_INT_WRAPPER_1(enum_framesizes, struct v4l2_frmsizeenum, *);
295V4L2_INT_WRAPPER_1(enum_frameintervals, struct v4l2_frmivalenum, *);
Sakari Ailus9b5d0f12007-07-18 17:59:15 -0300296
297V4L2_INT_WRAPPER_0(reset);
298V4L2_INT_WRAPPER_0(init);
299V4L2_INT_WRAPPER_1(g_chip_ident, int, *);
300
301#endif