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2bfb1070 DES |
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 | ||
cb6b3763 DES |
25 | #include "ieee802154.h" |
26 | ||
2bfb1070 DES |
27 | #define MASTER_SHOW_COMPLEX(name, format_string, args...) \ |
28 | static ssize_t name ## _show(struct device *dev, \ | |
29 | struct device_attribute *attr, char *buf) \ | |
30 | { \ | |
31 | struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \ | |
32 | int ret; \ | |
33 | \ | |
34 | mutex_lock(&phy->pib_lock); \ | |
375bb0e0 | 35 | ret = snprintf(buf, PAGE_SIZE, format_string "\n", args); \ |
2bfb1070 DES |
36 | mutex_unlock(&phy->pib_lock); \ |
37 | return ret; \ | |
38 | } | |
39 | ||
40 | #define MASTER_SHOW(field, format_string) \ | |
41 | MASTER_SHOW_COMPLEX(field, format_string, phy->field) | |
42 | ||
43 | MASTER_SHOW(current_channel, "%d"); | |
44 | MASTER_SHOW(current_page, "%d"); | |
2bfb1070 DES |
45 | MASTER_SHOW_COMPLEX(transmit_power, "%d +- %d dB", |
46 | ((signed char) (phy->transmit_power << 2)) >> 2, | |
47 | (phy->transmit_power >> 6) ? (phy->transmit_power >> 6) * 3 : 1 ); | |
48 | MASTER_SHOW(cca_mode, "%d"); | |
49 | ||
a0b4a738 DES |
50 | static ssize_t channels_supported_show(struct device *dev, |
51 | struct device_attribute *attr, char *buf) | |
52 | { | |
53 | struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); | |
54 | int ret; | |
55 | int i, len = 0; | |
56 | ||
57 | mutex_lock(&phy->pib_lock); | |
58 | for (i = 0; i < 32; i++) { | |
59 | ret = snprintf(buf + len, PAGE_SIZE - len, | |
60 | "%#09x\n", phy->channels_supported[i]); | |
61 | if (ret < 0) | |
62 | break; | |
63 | len += ret; | |
64 | } | |
65 | mutex_unlock(&phy->pib_lock); | |
66 | return len; | |
67 | } | |
68 | ||
2bfb1070 DES |
69 | static struct device_attribute pmib_attrs[] = { |
70 | __ATTR_RO(current_channel), | |
71 | __ATTR_RO(current_page), | |
72 | __ATTR_RO(channels_supported), | |
73 | __ATTR_RO(transmit_power), | |
74 | __ATTR_RO(cca_mode), | |
75 | {}, | |
76 | }; | |
77 | ||
78 | static void wpan_phy_release(struct device *d) | |
79 | { | |
80 | struct wpan_phy *phy = container_of(d, struct wpan_phy, dev); | |
81 | kfree(phy); | |
82 | } | |
83 | ||
84 | static struct class wpan_phy_class = { | |
85 | .name = "ieee802154", | |
86 | .dev_release = wpan_phy_release, | |
87 | .dev_attrs = pmib_attrs, | |
88 | }; | |
89 | ||
90 | static DEFINE_MUTEX(wpan_phy_mutex); | |
91 | static int wpan_phy_idx; | |
92 | ||
93 | static int wpan_phy_match(struct device *dev, void *data) | |
94 | { | |
95 | return !strcmp(dev_name(dev), (const char *)data); | |
96 | } | |
97 | ||
98 | struct wpan_phy *wpan_phy_find(const char *str) | |
99 | { | |
100 | struct device *dev; | |
101 | ||
102 | if (WARN_ON(!str)) | |
103 | return NULL; | |
104 | ||
105 | dev = class_find_device(&wpan_phy_class, NULL, | |
106 | (void *)str, wpan_phy_match); | |
107 | if (!dev) | |
108 | return NULL; | |
109 | ||
110 | return container_of(dev, struct wpan_phy, dev); | |
111 | } | |
112 | EXPORT_SYMBOL(wpan_phy_find); | |
113 | ||
1c889f4d DES |
114 | struct wpan_phy_iter_data { |
115 | int (*fn)(struct wpan_phy *phy, void *data); | |
116 | void *data; | |
117 | }; | |
118 | ||
119 | static int wpan_phy_iter(struct device *dev, void *_data) | |
120 | { | |
121 | struct wpan_phy_iter_data *wpid = _data; | |
122 | struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); | |
123 | return wpid->fn(phy, wpid->data); | |
124 | } | |
125 | ||
126 | int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), | |
127 | void *data) | |
128 | { | |
129 | struct wpan_phy_iter_data wpid = { | |
130 | .fn = fn, | |
131 | .data = data, | |
132 | }; | |
133 | ||
134 | return class_for_each_device(&wpan_phy_class, NULL, | |
135 | &wpid, wpan_phy_iter); | |
136 | } | |
137 | EXPORT_SYMBOL(wpan_phy_for_each); | |
138 | ||
2bfb1070 DES |
139 | static int wpan_phy_idx_valid(int idx) |
140 | { | |
141 | return idx >= 0; | |
142 | } | |
143 | ||
144 | struct wpan_phy *wpan_phy_alloc(size_t priv_size) | |
145 | { | |
146 | struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size, | |
147 | GFP_KERNEL); | |
148 | ||
149 | mutex_lock(&wpan_phy_mutex); | |
150 | phy->idx = wpan_phy_idx++; | |
151 | if (unlikely(!wpan_phy_idx_valid(phy->idx))) { | |
152 | wpan_phy_idx--; | |
153 | mutex_unlock(&wpan_phy_mutex); | |
154 | kfree(phy); | |
155 | return NULL; | |
156 | } | |
157 | mutex_unlock(&wpan_phy_mutex); | |
158 | ||
159 | mutex_init(&phy->pib_lock); | |
160 | ||
161 | device_initialize(&phy->dev); | |
162 | dev_set_name(&phy->dev, "wpan-phy%d", phy->idx); | |
163 | ||
164 | phy->dev.class = &wpan_phy_class; | |
165 | ||
37eb0edc DES |
166 | phy->current_channel = -1; /* not initialised */ |
167 | phy->current_page = 0; /* for compatibility */ | |
168 | ||
2bfb1070 DES |
169 | return phy; |
170 | } | |
171 | EXPORT_SYMBOL(wpan_phy_alloc); | |
172 | ||
e9cf356c | 173 | int wpan_phy_register(struct wpan_phy *phy) |
2bfb1070 | 174 | { |
2bfb1070 DES |
175 | return device_add(&phy->dev); |
176 | } | |
177 | EXPORT_SYMBOL(wpan_phy_register); | |
178 | ||
179 | void wpan_phy_unregister(struct wpan_phy *phy) | |
180 | { | |
181 | device_del(&phy->dev); | |
182 | } | |
183 | EXPORT_SYMBOL(wpan_phy_unregister); | |
184 | ||
185 | void wpan_phy_free(struct wpan_phy *phy) | |
186 | { | |
187 | put_device(&phy->dev); | |
188 | } | |
189 | EXPORT_SYMBOL(wpan_phy_free); | |
190 | ||
191 | static int __init wpan_phy_class_init(void) | |
192 | { | |
cb6b3763 DES |
193 | int rc; |
194 | rc = class_register(&wpan_phy_class); | |
195 | if (rc) | |
196 | goto err; | |
197 | ||
198 | rc = ieee802154_nl_init(); | |
199 | if (rc) | |
200 | goto err_nl; | |
201 | ||
202 | return 0; | |
203 | err_nl: | |
204 | class_unregister(&wpan_phy_class); | |
205 | err: | |
206 | return rc; | |
2bfb1070 | 207 | } |
cb6b3763 | 208 | module_init(wpan_phy_class_init); |
2bfb1070 DES |
209 | |
210 | static void __exit wpan_phy_class_exit(void) | |
211 | { | |
cb6b3763 | 212 | ieee802154_nl_exit(); |
2bfb1070 DES |
213 | class_unregister(&wpan_phy_class); |
214 | } | |
215 | module_exit(wpan_phy_class_exit); | |
216 | ||
2bfb1070 | 217 | MODULE_LICENSE("GPL v2"); |
cb6b3763 DES |
218 | MODULE_DESCRIPTION("IEEE 802.15.4 configuration interface"); |
219 | MODULE_AUTHOR("Dmitry Eremin-Solenikov"); | |
2bfb1070 | 220 |