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 } 114