2 v4l2 common internal API header
4 This header contains internal shared ioctl definitions for use by the
5 internal low-level v4l2 drivers.
6 Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal
9 Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #ifndef V4L2_COMMON_H_
27 #define V4L2_COMMON_H_
29 #include <media/v4l2-dev.h>
31 /* Common printk constucts for v4l-i2c drivers. These macros create a unique
32 prefix consisting of the driver name, the adapter number and the i2c
34 #define v4l_printk(level, name, adapter, addr, fmt, arg...) \
35 printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg)
37 #define v4l_client_printk(level, client, fmt, arg...) \
38 v4l_printk(level, (client)->dev.driver->name, (client)->adapter, \
39 (client)->addr, fmt , ## arg)
41 #define v4l_err(client, fmt, arg...) \
42 v4l_client_printk(KERN_ERR, client, fmt , ## arg)
44 #define v4l_warn(client, fmt, arg...) \
45 v4l_client_printk(KERN_WARNING, client, fmt , ## arg)
47 #define v4l_info(client, fmt, arg...) \
48 v4l_client_printk(KERN_INFO, client, fmt , ## arg)
50 /* These three macros assume that the debug level is set with a module
51 parameter called 'debug'. */
52 #define v4l_dbg(level, debug, client, fmt, arg...) \
54 if (debug >= (level)) \
55 v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
58 /* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */
59 #define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \
61 if (__debug >= (__level)) \
62 dev_printk(KERN_DEBUG, __dev, __fmt, ##__arg); \
65 /* ------------------------------------------------------------------------- */
67 /* These printk constructs can be used with v4l2_device and v4l2_subdev */
68 #define v4l2_printk(level, dev, fmt, arg...) \
69 printk(level "%s: " fmt, (dev)->name , ## arg)
71 #define v4l2_err(dev, fmt, arg...) \
72 v4l2_printk(KERN_ERR, dev, fmt , ## arg)
74 #define v4l2_warn(dev, fmt, arg...) \
75 v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
77 #define v4l2_info(dev, fmt, arg...) \
78 v4l2_printk(KERN_INFO, dev, fmt , ## arg)
80 /* These three macros assume that the debug level is set with a module
81 parameter called 'debug'. */
82 #define v4l2_dbg(level, debug, dev, fmt, arg...) \
84 if (debug >= (level)) \
85 v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
89 * v4l2_ctrl_query_fill- Fill in a struct v4l2_queryctrl
91 * @qctrl: pointer to the &struct v4l2_queryctrl to be filled
92 * @min: minimum value for the control
93 * @max: maximum value for the control
95 * @def: default value for the control
97 * Fills the &struct v4l2_queryctrl fields for the query control.
101 * This function assumes that the @qctrl->id field is filled.
103 * Returns -EINVAL if the control is not known by the V4L2 core, 0 on success.
106 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
107 s32 min, s32 max, s32 step, s32 def);
109 /* ------------------------------------------------------------------------- */
111 /* I2C Helper functions */
116 struct i2c_device_id;
119 struct v4l2_subdev_ops;
122 * v4l2_i2c_new_subdev - Load an i2c module and return an initialized
123 * &struct v4l2_subdev.
125 * @v4l2_dev: pointer to &struct v4l2_device
126 * @adapter: pointer to struct i2c_adapter
127 * @client_type: name of the chip that's on the adapter.
128 * @addr: I2C address. If zero, it will use @probe_addrs
129 * @probe_addrs: array with a list of address. The last entry at such
130 * array should be %I2C_CLIENT_END.
132 * returns a &struct v4l2_subdev pointer.
134 struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev,
135 struct i2c_adapter *adapter, const char *client_type,
136 u8 addr, const unsigned short *probe_addrs);
138 struct i2c_board_info;
141 * v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized
142 * &struct v4l2_subdev.
144 * @v4l2_dev: pointer to &struct v4l2_device
145 * @adapter: pointer to struct i2c_adapter
146 * @info: pointer to struct i2c_board_info used to replace the irq,
147 * platform_data and addr arguments.
148 * @probe_addrs: array with a list of address. The last entry at such
149 * array should be %I2C_CLIENT_END.
151 * returns a &struct v4l2_subdev pointer.
153 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
154 struct i2c_adapter *adapter, struct i2c_board_info *info,
155 const unsigned short *probe_addrs);
158 * v4l2_i2c_subdev_init - Initializes a &struct v4l2_subdev with data from
159 * an i2c_client struct.
161 * @sd: pointer to &struct v4l2_subdev
162 * @client: pointer to struct i2c_client
163 * @ops: pointer to &struct v4l2_subdev_ops
165 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
166 const struct v4l2_subdev_ops *ops);
169 * v4l2_i2c_subdev_addr - returns i2c client address of &struct v4l2_subdev.
171 * @sd: pointer to &struct v4l2_subdev
173 * Returns the address of an I2C sub-device
175 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd);
177 enum v4l2_i2c_tuner_type {
178 ADDRS_RADIO, /* Radio tuner addresses */
179 ADDRS_DEMOD, /* Demod tuner addresses */
180 ADDRS_TV, /* TV tuner addresses */
181 /* TV tuner addresses if demod is present, this excludes
182 addresses used by the demodulator from the list of
186 /* Return a list of I2C tuner addresses to probe. Use only if the tuner
187 addresses are unknown. */
188 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type);
190 /* ------------------------------------------------------------------------- */
192 /* SPI Helper functions */
193 #if defined(CONFIG_SPI)
195 #include <linux/spi/spi.h>
200 * v4l2_spi_new_subdev - Load an spi module and return an initialized
201 * &struct v4l2_subdev.
204 * @v4l2_dev: pointer to &struct v4l2_device.
205 * @master: pointer to struct spi_master.
206 * @info: pointer to struct spi_board_info.
208 * returns a &struct v4l2_subdev pointer.
210 struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev,
211 struct spi_master *master, struct spi_board_info *info);
214 * v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an
217 * @sd: pointer to &struct v4l2_subdev
218 * @spi: pointer to struct spi_device.
219 * @ops: pointer to &struct v4l2_subdev_ops
221 void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi,
222 const struct v4l2_subdev_ops *ops);
225 /* ------------------------------------------------------------------------- */
227 /* Note: these remaining ioctls/structs should be removed as well, but they are
228 still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and
229 v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup
230 is needed in those modules. */
233 struct v4l2_priv_tun_config {
237 #define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
239 #define VIDIOC_INT_RESET _IOW ('d', 102, u32)
241 struct v4l2_routing {
246 /* ------------------------------------------------------------------------- */
248 /* Miscellaneous helper functions */
250 void v4l_bound_align_image(unsigned int *w, unsigned int wmin,
251 unsigned int wmax, unsigned int walign,
252 unsigned int *h, unsigned int hmin,
253 unsigned int hmax, unsigned int halign,
254 unsigned int salign);
256 struct v4l2_discrete_probe {
257 const struct v4l2_frmsize_discrete *sizes;
261 const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
262 const struct v4l2_discrete_probe *probe,
263 s32 width, s32 height);
265 void v4l2_get_timestamp(struct timeval *tv);
267 #endif /* V4L2_COMMON_H_ */