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)->driver->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 /* ------------------------------------------------------------------------- */
60 /* These printk constructs can be used with v4l2_device and v4l2_subdev */
61 #define v4l2_printk(level, dev, fmt, arg...) \
62 printk(level "%s: " fmt, (dev)->name , ## arg)
64 #define v4l2_err(dev, fmt, arg...) \
65 v4l2_printk(KERN_ERR, dev, fmt , ## arg)
67 #define v4l2_warn(dev, fmt, arg...) \
68 v4l2_printk(KERN_WARNING, dev, fmt , ## arg)
70 #define v4l2_info(dev, fmt, arg...) \
71 v4l2_printk(KERN_INFO, dev, fmt , ## arg)
73 /* These three macros assume that the debug level is set with a module
74 parameter called 'debug'. */
75 #define v4l2_dbg(level, debug, dev, fmt, arg...) \
77 if (debug >= (level)) \
78 v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \
81 /* ------------------------------------------------------------------------- */
83 /* Control helper functions */
85 int v4l2_ctrl_check(struct v4l2_ext_control
*ctrl
, struct v4l2_queryctrl
*qctrl
,
86 const char * const *menu_items
);
87 const char *v4l2_ctrl_get_name(u32 id
);
88 const char * const *v4l2_ctrl_get_menu(u32 id
);
89 int v4l2_ctrl_query_fill(struct v4l2_queryctrl
*qctrl
, s32 min
, s32 max
, s32 step
, s32 def
);
90 int v4l2_ctrl_query_menu(struct v4l2_querymenu
*qmenu
,
91 struct v4l2_queryctrl
*qctrl
, const char * const *menu_items
);
92 #define V4L2_CTRL_MENU_IDS_END (0xffffffff)
93 int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu
*qmenu
, const u32
*ids
);
95 /* Note: ctrl_classes points to an array of u32 pointers. Each u32 array is a
96 0-terminated array of control IDs. Each array must be sorted low to high
97 and belong to the same control class. The array of u32 pointers must also
98 be sorted, from low class IDs to high class IDs. */
99 u32
v4l2_ctrl_next(const u32
* const *ctrl_classes
, u32 id
);
101 /* ------------------------------------------------------------------------- */
103 /* Register/chip ident helper function */
105 struct i2c_client
; /* forward reference */
106 int v4l2_chip_match_i2c_client(struct i2c_client
*c
, const struct v4l2_dbg_match
*match
);
107 int v4l2_chip_ident_i2c_client(struct i2c_client
*c
, struct v4l2_dbg_chip_ident
*chip
,
108 u32 ident
, u32 revision
);
109 int v4l2_chip_match_host(const struct v4l2_dbg_match
*match
);
111 /* ------------------------------------------------------------------------- */
113 /* I2C Helper functions */
118 struct i2c_device_id
;
121 struct v4l2_subdev_ops
;
124 /* Load an i2c module and return an initialized v4l2_subdev struct.
125 The client_type argument is the name of the chip that's on the adapter. */
126 struct v4l2_subdev
*v4l2_i2c_new_subdev(struct v4l2_device
*v4l2_dev
,
127 struct i2c_adapter
*adapter
, const char *client_type
,
128 u8 addr
, const unsigned short *probe_addrs
);
130 struct i2c_board_info
;
132 struct v4l2_subdev
*v4l2_i2c_new_subdev_board(struct v4l2_device
*v4l2_dev
,
133 struct i2c_adapter
*adapter
, struct i2c_board_info
*info
,
134 const unsigned short *probe_addrs
);
136 /* Initialize an v4l2_subdev with data from an i2c_client struct */
137 void v4l2_i2c_subdev_init(struct v4l2_subdev
*sd
, struct i2c_client
*client
,
138 const struct v4l2_subdev_ops
*ops
);
139 /* Return i2c client address of v4l2_subdev. */
140 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev
*sd
);
142 enum v4l2_i2c_tuner_type
{
143 ADDRS_RADIO
, /* Radio tuner addresses */
144 ADDRS_DEMOD
, /* Demod tuner addresses */
145 ADDRS_TV
, /* TV tuner addresses */
146 /* TV tuner addresses if demod is present, this excludes
147 addresses used by the demodulator from the list of
151 /* Return a list of I2C tuner addresses to probe. Use only if the tuner
152 addresses are unknown. */
153 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type
);
155 /* ------------------------------------------------------------------------- */
157 /* SPI Helper functions */
158 #if defined(CONFIG_SPI)
160 #include <linux/spi/spi.h>
164 /* Load an spi module and return an initialized v4l2_subdev struct.
165 The client_type argument is the name of the chip that's on the adapter. */
166 struct v4l2_subdev
*v4l2_spi_new_subdev(struct v4l2_device
*v4l2_dev
,
167 struct spi_master
*master
, struct spi_board_info
*info
);
169 /* Initialize an v4l2_subdev with data from an spi_device struct */
170 void v4l2_spi_subdev_init(struct v4l2_subdev
*sd
, struct spi_device
*spi
,
171 const struct v4l2_subdev_ops
*ops
);
174 /* ------------------------------------------------------------------------- */
176 /* Note: these remaining ioctls/structs should be removed as well, but they are
177 still used in tuner-simple.c (TUNER_SET_CONFIG), cx18/ivtv (RESET) and
178 v4l2-int-device.h (v4l2_routing). To remove these ioctls some more cleanup
179 is needed in those modules. */
182 struct v4l2_priv_tun_config
{
186 #define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config)
188 #define VIDIOC_INT_RESET _IOW ('d', 102, u32)
190 struct v4l2_routing
{
195 /* ------------------------------------------------------------------------- */
197 /* Miscellaneous helper functions */
199 void v4l_bound_align_image(unsigned int *w
, unsigned int wmin
,
200 unsigned int wmax
, unsigned int walign
,
201 unsigned int *h
, unsigned int hmin
,
202 unsigned int hmax
, unsigned int halign
,
203 unsigned int salign
);
204 int v4l_fill_dv_preset_info(u32 preset
, struct v4l2_dv_enum_preset
*info
);
206 struct v4l2_discrete_probe
{
207 const struct v4l2_frmsize_discrete
*sizes
;
211 const struct v4l2_frmsize_discrete
*v4l2_find_nearest_format(
212 const struct v4l2_discrete_probe
*probe
,
213 s32 width
, s32 height
);
215 #endif /* V4L2_COMMON_H_ */
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