2 * Copyright (C) 2007, 2008, 2009 Siemens AG
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.
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.
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.
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/device.h>
23 #include <net/wpan-phy.h>
25 #define MASTER_SHOW_COMPLEX(name, format_string, args...) \
26 static ssize_t name ## _show(struct device *dev, \
27 struct device_attribute *attr, char *buf) \
29 struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \
32 mutex_lock(&phy->pib_lock); \
33 ret = sprintf(buf, format_string "\n", args); \
34 mutex_unlock(&phy->pib_lock); \
38 #define MASTER_SHOW(field, format_string) \
39 MASTER_SHOW_COMPLEX(field, format_string, phy->field)
41 MASTER_SHOW(current_channel, "%d");
42 MASTER_SHOW(current_page, "%d");
43 MASTER_SHOW(channels_supported, "%#x");
44 MASTER_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 );
47 MASTER_SHOW(cca_mode, "%d");
49 static 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),
58 static void wpan_phy_release(struct device *d)
60 struct wpan_phy *phy = container_of(d, struct wpan_phy, dev);
64 static struct class wpan_phy_class = {
66 .dev_release = wpan_phy_release,
67 .dev_attrs = pmib_attrs,
70 static DEFINE_MUTEX(wpan_phy_mutex);
71 static int wpan_phy_idx;
73 static int wpan_phy_match(struct device *dev, void *data)
75 return !strcmp(dev_name(dev), (const char *)data);
78 struct wpan_phy *wpan_phy_find(const char *str)
85 dev = class_find_device(&wpan_phy_class, NULL,
86 (void *)str, wpan_phy_match);
90 return container_of(dev, struct wpan_phy, dev);
92 EXPORT_SYMBOL(wpan_phy_find);
94 struct wpan_phy_iter_data {
95 int (*fn)(struct wpan_phy *phy, void *data);
99 static int wpan_phy_iter(struct device *dev, void *_data)
101 struct wpan_phy_iter_data *wpid = _data;
102 struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev);
103 return wpid->fn(phy, wpid->data);
106 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data),
109 struct wpan_phy_iter_data wpid = {
114 return class_for_each_device(&wpan_phy_class, NULL,
115 &wpid, wpan_phy_iter);
117 EXPORT_SYMBOL(wpan_phy_for_each);
119 static int wpan_phy_idx_valid(int idx)
124 struct wpan_phy *wpan_phy_alloc(size_t priv_size)
126 struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size,
129 mutex_lock(&wpan_phy_mutex);
130 phy->idx = wpan_phy_idx++;
131 if (unlikely(!wpan_phy_idx_valid(phy->idx))) {
133 mutex_unlock(&wpan_phy_mutex);
137 mutex_unlock(&wpan_phy_mutex);
139 mutex_init(&phy->pib_lock);
141 device_initialize(&phy->dev);
142 dev_set_name(&phy->dev, "wpan-phy%d", phy->idx);
144 phy->dev.class = &wpan_phy_class;
146 phy->current_channel = -1; /* not initialised */
147 phy->current_page = 0; /* for compatibility */
151 EXPORT_SYMBOL(wpan_phy_alloc);
153 int wpan_phy_register(struct device *parent, struct wpan_phy *phy)
155 phy->dev.parent = parent;
157 return device_add(&phy->dev);
159 EXPORT_SYMBOL(wpan_phy_register);
161 void wpan_phy_unregister(struct wpan_phy *phy)
163 device_del(&phy->dev);
165 EXPORT_SYMBOL(wpan_phy_unregister);
167 void wpan_phy_free(struct wpan_phy *phy)
169 put_device(&phy->dev);
171 EXPORT_SYMBOL(wpan_phy_free);
173 static int __init wpan_phy_class_init(void)
175 return class_register(&wpan_phy_class);
177 subsys_initcall(wpan_phy_class_init);
179 static void __exit wpan_phy_class_exit(void)
181 class_unregister(&wpan_phy_class);
183 module_exit(wpan_phy_class_exit);
185 MODULE_DESCRIPTION("IEEE 802.15.4 device class");
186 MODULE_LICENSE("GPL v2");