2 * v4l2-i2c-drv-legacy.h - contains I2C handling code that's identical
3 * for all V4L2 I2C drivers. Use this header if the
4 * I2C driver is used by both legacy drivers and
5 * drivers converted to the bus-based I2C API.
7 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU 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., 675 Mass Ave, Cambridge, MA 02139, USA.
24 struct v4l2_i2c_driver_data
{
25 const char * const name
;
27 int (*command
)(struct i2c_client
*client
, unsigned int cmd
, void *arg
);
28 int (*probe
)(struct i2c_client
*client
);
29 int (*remove
)(struct i2c_client
*client
);
30 int (*suspend
)(struct i2c_client
*client
, pm_message_t state
);
31 int (*resume
)(struct i2c_client
*client
);
35 static struct v4l2_i2c_driver_data v4l2_i2c_data
;
36 static struct i2c_client_address_data addr_data
;
37 static struct i2c_driver v4l2_i2c_driver_legacy
;
38 static char v4l2_i2c_drv_name_legacy
[32];
40 static int v4l2_i2c_drv_attach_legacy(struct i2c_adapter
*adapter
, int address
, int kind
)
42 return v4l2_i2c_attach(adapter
, address
, &v4l2_i2c_driver_legacy
,
43 v4l2_i2c_drv_name_legacy
, v4l2_i2c_data
.probe
);
46 static int v4l2_i2c_drv_probe_legacy(struct i2c_adapter
*adapter
)
48 if (adapter
->class & v4l2_i2c_data
.legacy_class
)
49 return i2c_probe(adapter
, &addr_data
, v4l2_i2c_drv_attach_legacy
);
53 static int v4l2_i2c_drv_detach_legacy(struct i2c_client
*client
)
55 int err
= i2c_detach_client(client
);
59 if (v4l2_i2c_data
.remove
)
60 v4l2_i2c_data
.remove(client
);
66 static int v4l2_i2c_drv_suspend_helper(struct i2c_client
*client
, pm_message_t state
)
68 return v4l2_i2c_data
.suspend
? v4l2_i2c_data
.suspend(client
, state
) : 0;
71 static int v4l2_i2c_drv_resume_helper(struct i2c_client
*client
)
73 return v4l2_i2c_data
.resume
? v4l2_i2c_data
.resume(client
) : 0;
76 /* ----------------------------------------------------------------------- */
78 /* i2c implementation */
79 static struct i2c_driver v4l2_i2c_driver_legacy
= {
83 .attach_adapter
= v4l2_i2c_drv_probe_legacy
,
84 .detach_client
= v4l2_i2c_drv_detach_legacy
,
85 .suspend
= v4l2_i2c_drv_suspend_helper
,
86 .resume
= v4l2_i2c_drv_resume_helper
,
89 /* ----------------------------------------------------------------------- */
91 /* i2c implementation */
92 static struct i2c_driver v4l2_i2c_driver
= {
93 .suspend
= v4l2_i2c_drv_suspend_helper
,
94 .resume
= v4l2_i2c_drv_resume_helper
,
97 static int __init
v4l2_i2c_drv_init(void)
101 strlcpy(v4l2_i2c_drv_name_legacy
, v4l2_i2c_data
.name
, sizeof(v4l2_i2c_drv_name_legacy
));
102 strlcat(v4l2_i2c_drv_name_legacy
, "'", sizeof(v4l2_i2c_drv_name_legacy
));
104 if (v4l2_i2c_data
.legacy_class
== 0)
105 v4l2_i2c_data
.legacy_class
= I2C_CLASS_TV_ANALOG
;
107 v4l2_i2c_driver_legacy
.driver
.name
= v4l2_i2c_drv_name_legacy
;
108 v4l2_i2c_driver_legacy
.id
= v4l2_i2c_data
.driverid
;
109 v4l2_i2c_driver_legacy
.command
= v4l2_i2c_data
.command
;
110 err
= i2c_add_driver(&v4l2_i2c_driver_legacy
);
114 v4l2_i2c_driver
.driver
.name
= v4l2_i2c_data
.name
;
115 v4l2_i2c_driver
.id
= v4l2_i2c_data
.driverid
;
116 v4l2_i2c_driver
.command
= v4l2_i2c_data
.command
;
117 v4l2_i2c_driver
.probe
= v4l2_i2c_data
.probe
;
118 v4l2_i2c_driver
.remove
= v4l2_i2c_data
.remove
;
119 err
= i2c_add_driver(&v4l2_i2c_driver
);
121 i2c_del_driver(&v4l2_i2c_driver_legacy
);
125 static void __exit
v4l2_i2c_drv_cleanup(void)
127 i2c_del_driver(&v4l2_i2c_driver_legacy
);
128 i2c_del_driver(&v4l2_i2c_driver
);
131 module_init(v4l2_i2c_drv_init
);
132 module_exit(v4l2_i2c_drv_cleanup
);