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authorDmitry Eremin-Solenikov <dbaryshkov@gmail.com>2009-08-14 08:13:12 -0400
committerDmitry Eremin-Solenikov <dbaryshkov@gmail.com>2009-08-19 15:08:20 -0400
commit2bfb1070ba1fdb8cbc2b0b9ff61a3b0701ab40de (patch)
tree72b91a81b05f74fb62eeb4b4e918c36fe57c8f26 /net/ieee802154/wpan-class.c
parenta0aea57786fe9c6b62b1a4f28409582520fa494f (diff)
ieee802154: add a sysfs representation of WPAN master devices
Add a sysfs/in-kernel representation of LR-WPAN master devices. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Diffstat (limited to 'net/ieee802154/wpan-class.c')
-rw-r--r--net/ieee802154/wpan-class.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/net/ieee802154/wpan-class.c b/net/ieee802154/wpan-class.c
new file mode 100644
index 000000000000..f306604da67a
--- /dev/null
+++ b/net/ieee802154/wpan-class.c
@@ -0,0 +1,159 @@
1/*
2 * Copyright (C) 2007, 2008, 2009 Siemens AG
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/device.h>
22
23#include <net/wpan-phy.h>
24
25#define MASTER_SHOW_COMPLEX(name, format_string, args...) \
26static ssize_t name ## _show(struct device *dev, \
27 struct device_attribute *attr, char *buf) \
28{ \
29 struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \
30 int ret; \
31 \
32 mutex_lock(&phy->pib_lock); \
33 ret = sprintf(buf, format_string "\n", args); \
34 mutex_unlock(&phy->pib_lock); \
35 return ret; \
36}
37
38#define MASTER_SHOW(field, format_string) \
39 MASTER_SHOW_COMPLEX(field, format_string, phy->field)
40
41MASTER_SHOW(current_channel, "%d");
42MASTER_SHOW(current_page, "%d");
43MASTER_SHOW(channels_supported, "%#x");
44MASTER_SHOW_COMPLEX(transmit_power, "%d +- %d dB",
45 ((signed char) (phy->transmit_power << 2)) >> 2,
46 (phy->transmit_power >> 6) ? (phy->transmit_power >> 6) * 3 : 1 );
47MASTER_SHOW(cca_mode, "%d");
48
49static struct device_attribute pmib_attrs[] = {
50 __ATTR_RO(current_channel),
51 __ATTR_RO(current_page),
52 __ATTR_RO(channels_supported),
53 __ATTR_RO(transmit_power),
54 __ATTR_RO(cca_mode),
55 {},
56};
57
58static void wpan_phy_release(struct device *d)
59{
60 struct wpan_phy *phy = container_of(d, struct wpan_phy, dev);
61 kfree(phy);
62}
63
64static struct class wpan_phy_class = {
65 .name = "ieee802154",
66 .dev_release = wpan_phy_release,
67 .dev_attrs = pmib_attrs,
68};
69
70static DEFINE_MUTEX(wpan_phy_mutex);
71static int wpan_phy_idx;
72
73static int wpan_phy_match(struct device *dev, void *data)
74{
75 return !strcmp(dev_name(dev), (const char *)data);
76}
77
78struct wpan_phy *wpan_phy_find(const char *str)
79{
80 struct device *dev;
81
82 if (WARN_ON(!str))
83 return NULL;
84
85 dev = class_find_device(&wpan_phy_class, NULL,
86 (void *)str, wpan_phy_match);
87 if (!dev)
88 return NULL;
89
90 return container_of(dev, struct wpan_phy, dev);
91}
92EXPORT_SYMBOL(wpan_phy_find);
93
94static int wpan_phy_idx_valid(int idx)
95{
96 return idx >= 0;
97}
98
99struct wpan_phy *wpan_phy_alloc(size_t priv_size)
100{
101 struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size,
102 GFP_KERNEL);
103
104 mutex_lock(&wpan_phy_mutex);
105 phy->idx = wpan_phy_idx++;
106 if (unlikely(!wpan_phy_idx_valid(phy->idx))) {
107 wpan_phy_idx--;
108 mutex_unlock(&wpan_phy_mutex);
109 kfree(phy);
110 return NULL;
111 }
112 mutex_unlock(&wpan_phy_mutex);
113
114 mutex_init(&phy->pib_lock);
115
116 device_initialize(&phy->dev);
117 dev_set_name(&phy->dev, "wpan-phy%d", phy->idx);
118
119 phy->dev.class = &wpan_phy_class;
120
121 return phy;
122}
123EXPORT_SYMBOL(wpan_phy_alloc);
124
125int wpan_phy_register(struct device *parent, struct wpan_phy *phy)
126{
127 phy->dev.parent = parent;
128
129 return device_add(&phy->dev);
130}
131EXPORT_SYMBOL(wpan_phy_register);
132
133void wpan_phy_unregister(struct wpan_phy *phy)
134{
135 device_del(&phy->dev);
136}
137EXPORT_SYMBOL(wpan_phy_unregister);
138
139void wpan_phy_free(struct wpan_phy *phy)
140{
141 put_device(&phy->dev);
142}
143EXPORT_SYMBOL(wpan_phy_free);
144
145static int __init wpan_phy_class_init(void)
146{
147 return class_register(&wpan_phy_class);
148}
149subsys_initcall(wpan_phy_class_init);
150
151static void __exit wpan_phy_class_exit(void)
152{
153 class_unregister(&wpan_phy_class);
154}
155module_exit(wpan_phy_class_exit);
156
157MODULE_DESCRIPTION("IEEE 802.15.4 device class");
158MODULE_LICENSE("GPL v2");
159