1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* linux/device.h compatibility header
*/
/*
Copyright (C) 2004-2006 Frank Mori Hess <fmhess@users.sourceforge.net>
Copyright (C) 2005-2006 Ian Abbott
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __COMPAT_LINUX_DEVICE_H_
#define __COMPAT_LINUX_DEVICE_H_
#include <linux/version.h>
/*
* Notes:
*
* The 'struct device *' returned by the device_create() compatibility
* functions (assuming the return value is not an error pointer for which
* 'IS_ERR(ptr)' is true) is not really a 'struct device *' and should not
* be treated as such. For kernel versions 2.5.0 to 2.6.17, the return
* value is actually a 'struct class_device *' in disguise and we assume
* the 'parent' parameter of device_create() is also a 'struct class_device *'
* in disguise from a previous call to device_create().
*
* The main limitation is that we cannot use a *real* 'struct device *' as
* the parent parameter of device_create(), only a pointer from a previous
* call to device_create().
*
* Call COMEDI_DEVICE_CREATE() instead of device_create() for compatibility
* with kernel versions prior to 2.6.27.
*
* We do not currently support 'dev_get_drvdata()' and 'dev_set_drvdata()'
* for kernel versions prior to 2.6.26, so the 'drvdata' parameter of
* COMEDI_DEVICE_CREATE() is pretty useless.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#include <pcmcia/cs_types.h>
struct device_driver {
char *name;
};
struct class;
struct device;
static inline struct class *class_create(struct module *owner, char *name)
{
return NULL;
}
static inline void class_destroy(struct class *cs)
{
}
static inline struct device *device_create(struct class *cls,
struct device *parent, dev_t devt, void *drvdata, char *fmt, ...)
{
return NULL;
}
static inline void device_destroy(struct class *cs, dev_t devt)
{
}
#else
#include_next <linux/device.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13)
#define class_create(owner, name) \
(struct class *)class_simple_create(owner, name)
#define class_destroy(cs) \
class_simple_destroy((struct class_simple *)(cs))
#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, fmt...) \
(struct device *)class_simple_device_add((struct class_simple *)(cs), \
devt, NULL, fmt)
#define device_destroy(cs, devt) \
class_simple_device_remove(devt)
#else
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, fmt...) \
(struct device *)class_device_create(cs, devt, NULL, fmt)
#define device_destroy(cs, devt) \
class_device_destroy(cs, devt)
#else
/* device_create does not work for NULL parent with 2.6.18, not sure
exactly which kernel version it was fixed in. */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, fmt...) \
(struct device *)class_device_create( \
cs, (struct class_device *)parent, devt, NULL, fmt)
#define device_destroy(cs, devt) \
class_device_destroy(cs, devt)
#else
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, fmt...) \
device_create(cs, parent, devt, fmt)
#else
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, fmt...) \
device_create_drvdata(cs, parent, devt, drvdata, fmt)
#else
#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, fmt...) \
device_create(cs, parent, devt, drvdata, fmt)
#endif // LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
#endif // LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
#endif // LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
#endif // LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15)
#endif // LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13)
#endif // LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#endif // __COMPAT_LINUX_DEVICE_H_
|
