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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 | ||
5a0e3ad6 | 19 | #include <linux/slab.h> |
2bfb1070 DES |
20 | #include <linux/kernel.h> |
21 | #include <linux/module.h> | |
22 | #include <linux/device.h> | |
23 | ||
24 | #include <net/wpan-phy.h> | |
25 | ||
cb6b3763 DES |
26 | #include "ieee802154.h" |
27 | ||
2bfb1070 DES |
28 | #define MASTER_SHOW_COMPLEX(name, format_string, args...) \ |
29 | static ssize_t name ## _show(struct device *dev, \ | |
30 | struct device_attribute *attr, char *buf) \ | |
31 | { \ | |
32 | struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \ | |
33 | int ret; \ | |
34 | \ | |
35 | mutex_lock(&phy->pib_lock); \ | |
375bb0e0 | 36 | ret = snprintf(buf, PAGE_SIZE, format_string "\n", args); \ |
2bfb1070 DES |
37 | mutex_unlock(&phy->pib_lock); \ |
38 | return ret; \ | |
7f4708ab GKH |
39 | } \ |
40 | static DEVICE_ATTR_RO(name); | |
2bfb1070 DES |
41 | |
42 | #define MASTER_SHOW(field, format_string) \ | |
43 | MASTER_SHOW_COMPLEX(field, format_string, phy->field) | |
44 | ||
45 | MASTER_SHOW(current_channel, "%d"); | |
46 | MASTER_SHOW(current_page, "%d"); | |
9b2777d6 | 47 | MASTER_SHOW(transmit_power, "%d +- 1 dB"); |
2bfb1070 DES |
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 | } | |
7f4708ab GKH |
68 | static DEVICE_ATTR_RO(channels_supported); |
69 | ||
70 | static struct attribute *pmib_attrs[] = { | |
71 | &dev_attr_current_channel.attr, | |
72 | &dev_attr_current_page.attr, | |
73 | &dev_attr_channels_supported.attr, | |
74 | &dev_attr_transmit_power.attr, | |
75 | &dev_attr_cca_mode.attr, | |
76 | NULL, | |
2bfb1070 | 77 | }; |
7f4708ab | 78 | ATTRIBUTE_GROUPS(pmib); |
2bfb1070 DES |
79 | |
80 | static void wpan_phy_release(struct device *d) | |
81 | { | |
82 | struct wpan_phy *phy = container_of(d, struct wpan_phy, dev); | |
83 | kfree(phy); | |
84 | } | |
85 | ||
86 | static struct class wpan_phy_class = { | |
87 | .name = "ieee802154", | |
88 | .dev_release = wpan_phy_release, | |
7f4708ab | 89 | .dev_groups = pmib_groups, |
2bfb1070 DES |
90 | }; |
91 | ||
92 | static DEFINE_MUTEX(wpan_phy_mutex); | |
93 | static int wpan_phy_idx; | |
94 | ||
9f3b795a | 95 | static int wpan_phy_match(struct device *dev, const void *data) |
2bfb1070 DES |
96 | { |
97 | return !strcmp(dev_name(dev), (const char *)data); | |
98 | } | |
99 | ||
100 | struct wpan_phy *wpan_phy_find(const char *str) | |
101 | { | |
102 | struct device *dev; | |
103 | ||
104 | if (WARN_ON(!str)) | |
105 | return NULL; | |
106 | ||
9f3b795a | 107 | dev = class_find_device(&wpan_phy_class, NULL, str, wpan_phy_match); |
2bfb1070 DES |
108 | if (!dev) |
109 | return NULL; | |
110 | ||
111 | return container_of(dev, struct wpan_phy, dev); | |
112 | } | |
113 | EXPORT_SYMBOL(wpan_phy_find); | |
114 | ||
1c889f4d DES |
115 | struct wpan_phy_iter_data { |
116 | int (*fn)(struct wpan_phy *phy, void *data); | |
117 | void *data; | |
118 | }; | |
119 | ||
120 | static int wpan_phy_iter(struct device *dev, void *_data) | |
121 | { | |
122 | struct wpan_phy_iter_data *wpid = _data; | |
123 | struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); | |
124 | return wpid->fn(phy, wpid->data); | |
125 | } | |
126 | ||
127 | int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), | |
128 | void *data) | |
129 | { | |
130 | struct wpan_phy_iter_data wpid = { | |
131 | .fn = fn, | |
132 | .data = data, | |
133 | }; | |
134 | ||
135 | return class_for_each_device(&wpan_phy_class, NULL, | |
136 | &wpid, wpan_phy_iter); | |
137 | } | |
138 | EXPORT_SYMBOL(wpan_phy_for_each); | |
139 | ||
2bfb1070 DES |
140 | static int wpan_phy_idx_valid(int idx) |
141 | { | |
142 | return idx >= 0; | |
143 | } | |
144 | ||
145 | struct wpan_phy *wpan_phy_alloc(size_t priv_size) | |
146 | { | |
147 | struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size, | |
148 | GFP_KERNEL); | |
149 | ||
a6c0f821 DK |
150 | if (!phy) |
151 | goto out; | |
2bfb1070 DES |
152 | mutex_lock(&wpan_phy_mutex); |
153 | phy->idx = wpan_phy_idx++; | |
154 | if (unlikely(!wpan_phy_idx_valid(phy->idx))) { | |
155 | wpan_phy_idx--; | |
156 | mutex_unlock(&wpan_phy_mutex); | |
157 | kfree(phy); | |
a6c0f821 | 158 | goto out; |
2bfb1070 DES |
159 | } |
160 | mutex_unlock(&wpan_phy_mutex); | |
161 | ||
162 | mutex_init(&phy->pib_lock); | |
163 | ||
164 | device_initialize(&phy->dev); | |
165 | dev_set_name(&phy->dev, "wpan-phy%d", phy->idx); | |
166 | ||
167 | phy->dev.class = &wpan_phy_class; | |
168 | ||
37eb0edc DES |
169 | phy->current_channel = -1; /* not initialised */ |
170 | phy->current_page = 0; /* for compatibility */ | |
171 | ||
2bfb1070 | 172 | return phy; |
a6c0f821 DK |
173 | |
174 | out: | |
175 | return NULL; | |
2bfb1070 DES |
176 | } |
177 | EXPORT_SYMBOL(wpan_phy_alloc); | |
178 | ||
e9cf356c | 179 | int wpan_phy_register(struct wpan_phy *phy) |
2bfb1070 | 180 | { |
2bfb1070 DES |
181 | return device_add(&phy->dev); |
182 | } | |
183 | EXPORT_SYMBOL(wpan_phy_register); | |
184 | ||
185 | void wpan_phy_unregister(struct wpan_phy *phy) | |
186 | { | |
187 | device_del(&phy->dev); | |
188 | } | |
189 | EXPORT_SYMBOL(wpan_phy_unregister); | |
190 | ||
191 | void wpan_phy_free(struct wpan_phy *phy) | |
192 | { | |
193 | put_device(&phy->dev); | |
194 | } | |
195 | EXPORT_SYMBOL(wpan_phy_free); | |
196 | ||
197 | static int __init wpan_phy_class_init(void) | |
198 | { | |
cb6b3763 DES |
199 | int rc; |
200 | rc = class_register(&wpan_phy_class); | |
201 | if (rc) | |
202 | goto err; | |
203 | ||
204 | rc = ieee802154_nl_init(); | |
205 | if (rc) | |
206 | goto err_nl; | |
207 | ||
208 | return 0; | |
209 | err_nl: | |
210 | class_unregister(&wpan_phy_class); | |
211 | err: | |
212 | return rc; | |
2bfb1070 | 213 | } |
282a3954 | 214 | subsys_initcall(wpan_phy_class_init); |
2bfb1070 DES |
215 | |
216 | static void __exit wpan_phy_class_exit(void) | |
217 | { | |
cb6b3763 | 218 | ieee802154_nl_exit(); |
2bfb1070 DES |
219 | class_unregister(&wpan_phy_class); |
220 | } | |
221 | module_exit(wpan_phy_class_exit); | |
222 | ||
2bfb1070 | 223 | MODULE_LICENSE("GPL v2"); |
cb6b3763 DES |
224 | MODULE_DESCRIPTION("IEEE 802.15.4 configuration interface"); |
225 | MODULE_AUTHOR("Dmitry Eremin-Solenikov"); | |
2bfb1070 | 226 |