Merge branch 'topic/asoc' into for-linus
[linux-2.6] / net / wireless / sysfs.c
1 /*
2  * This file provides /sys/class/ieee80211/<wiphy name>/
3  * and some default attributes.
4  *
5  * Copyright 2005-2006  Jiri Benc <jbenc@suse.cz>
6  * Copyright 2006       Johannes Berg <johannes@sipsolutions.net>
7  *
8  * This file is GPLv2 as found in COPYING.
9  */
10
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/netdevice.h>
14 #include <linux/nl80211.h>
15 #include <linux/rtnetlink.h>
16 #include <net/cfg80211.h>
17 #include "sysfs.h"
18 #include "core.h"
19
20 static inline struct cfg80211_registered_device *dev_to_rdev(
21         struct device *dev)
22 {
23         return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
24 }
25
26 #define SHOW_FMT(name, fmt, member)                                     \
27 static ssize_t name ## _show(struct device *dev,                        \
28                               struct device_attribute *attr,            \
29                               char *buf)                                \
30 {                                                                       \
31         return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
32 }
33
34 SHOW_FMT(index, "%d", wiphy_idx);
35 SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
36
37 static struct device_attribute ieee80211_dev_attrs[] = {
38         __ATTR_RO(index),
39         __ATTR_RO(macaddress),
40         {}
41 };
42
43 static void wiphy_dev_release(struct device *dev)
44 {
45         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
46
47         cfg80211_dev_free(rdev);
48 }
49
50 #ifdef CONFIG_HOTPLUG
51 static int wiphy_uevent(struct device *dev, struct kobj_uevent_env *env)
52 {
53         /* TODO, we probably need stuff here */
54         return 0;
55 }
56 #endif
57
58 static int wiphy_suspend(struct device *dev, pm_message_t state)
59 {
60         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
61         int ret = 0;
62
63         rdev->suspend_at = get_seconds();
64
65         if (rdev->ops->suspend) {
66                 rtnl_lock();
67                 ret = rdev->ops->suspend(&rdev->wiphy);
68                 rtnl_unlock();
69         }
70
71         return ret;
72 }
73
74 static int wiphy_resume(struct device *dev)
75 {
76         struct cfg80211_registered_device *rdev = dev_to_rdev(dev);
77         int ret = 0;
78
79         /* Age scan results with time spent in suspend */
80         spin_lock_bh(&rdev->bss_lock);
81         cfg80211_bss_age(rdev, get_seconds() - rdev->suspend_at);
82         spin_unlock_bh(&rdev->bss_lock);
83
84         if (rdev->ops->resume) {
85                 rtnl_lock();
86                 ret = rdev->ops->resume(&rdev->wiphy);
87                 rtnl_unlock();
88         }
89
90         return ret;
91 }
92
93 struct class ieee80211_class = {
94         .name = "ieee80211",
95         .owner = THIS_MODULE,
96         .dev_release = wiphy_dev_release,
97         .dev_attrs = ieee80211_dev_attrs,
98 #ifdef CONFIG_HOTPLUG
99         .dev_uevent = wiphy_uevent,
100 #endif
101         .suspend = wiphy_suspend,
102         .resume = wiphy_resume,
103 };
104
105 int wiphy_sysfs_init(void)
106 {
107         return class_register(&ieee80211_class);
108 }
109
110 void wiphy_sysfs_exit(void)
111 {
112         class_unregister(&ieee80211_class);
113 }