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1 | /* |
2 | ||
3 | Broadcom B43 wireless driver | |
4 | ||
5 | SYSFS support routines | |
6 | ||
7 | Copyright (c) 2006 Michael Buesch <mb@bu3sch.de> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; see the file COPYING. If not, write to | |
21 | the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, | |
22 | Boston, MA 02110-1301, USA. | |
23 | ||
24 | */ | |
25 | ||
50e36ebe GU |
26 | #include <linux/capability.h> |
27 | #include <linux/io.h> | |
28 | ||
e4d6b795 MB |
29 | #include "b43.h" |
30 | #include "sysfs.h" | |
31 | #include "main.h" | |
32 | #include "phy.h" | |
33 | ||
e4d6b795 MB |
34 | #define GENERIC_FILESIZE 64 |
35 | ||
36 | static int get_integer(const char *buf, size_t count) | |
37 | { | |
38 | char tmp[10 + 1] = { 0 }; | |
39 | int ret = -EINVAL; | |
40 | ||
41 | if (count == 0) | |
42 | goto out; | |
43 | count = min(count, (size_t) 10); | |
44 | memcpy(tmp, buf, count); | |
45 | ret = simple_strtol(tmp, NULL, 10); | |
46 | out: | |
47 | return ret; | |
48 | } | |
49 | ||
50 | static int get_boolean(const char *buf, size_t count) | |
51 | { | |
52 | if (count != 0) { | |
53 | if (buf[0] == '1') | |
54 | return 1; | |
55 | if (buf[0] == '0') | |
56 | return 0; | |
57 | if (count >= 4 && memcmp(buf, "true", 4) == 0) | |
58 | return 1; | |
59 | if (count >= 5 && memcmp(buf, "false", 5) == 0) | |
60 | return 0; | |
61 | if (count >= 3 && memcmp(buf, "yes", 3) == 0) | |
62 | return 1; | |
63 | if (count >= 2 && memcmp(buf, "no", 2) == 0) | |
64 | return 0; | |
65 | if (count >= 2 && memcmp(buf, "on", 2) == 0) | |
66 | return 1; | |
67 | if (count >= 3 && memcmp(buf, "off", 3) == 0) | |
68 | return 0; | |
69 | } | |
70 | return -EINVAL; | |
71 | } | |
72 | ||
73 | static ssize_t b43_attr_interfmode_show(struct device *dev, | |
74 | struct device_attribute *attr, | |
75 | char *buf) | |
76 | { | |
77 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); | |
78 | ssize_t count = 0; | |
79 | ||
80 | if (!capable(CAP_NET_ADMIN)) | |
81 | return -EPERM; | |
82 | ||
83 | mutex_lock(&wldev->wl->mutex); | |
84 | ||
85 | switch (wldev->phy.interfmode) { | |
86 | case B43_INTERFMODE_NONE: | |
87 | count = | |
88 | snprintf(buf, PAGE_SIZE, | |
89 | "0 (No Interference Mitigation)\n"); | |
90 | break; | |
91 | case B43_INTERFMODE_NONWLAN: | |
92 | count = | |
93 | snprintf(buf, PAGE_SIZE, | |
94 | "1 (Non-WLAN Interference Mitigation)\n"); | |
95 | break; | |
96 | case B43_INTERFMODE_MANUALWLAN: | |
97 | count = | |
98 | snprintf(buf, PAGE_SIZE, | |
99 | "2 (WLAN Interference Mitigation)\n"); | |
100 | break; | |
101 | default: | |
102 | B43_WARN_ON(1); | |
103 | } | |
104 | ||
105 | mutex_unlock(&wldev->wl->mutex); | |
106 | ||
107 | return count; | |
108 | } | |
109 | ||
110 | static ssize_t b43_attr_interfmode_store(struct device *dev, | |
111 | struct device_attribute *attr, | |
112 | const char *buf, size_t count) | |
113 | { | |
114 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); | |
115 | unsigned long flags; | |
116 | int err; | |
117 | int mode; | |
118 | ||
119 | if (!capable(CAP_NET_ADMIN)) | |
120 | return -EPERM; | |
121 | ||
122 | mode = get_integer(buf, count); | |
123 | switch (mode) { | |
124 | case 0: | |
125 | mode = B43_INTERFMODE_NONE; | |
126 | break; | |
127 | case 1: | |
128 | mode = B43_INTERFMODE_NONWLAN; | |
129 | break; | |
130 | case 2: | |
131 | mode = B43_INTERFMODE_MANUALWLAN; | |
132 | break; | |
133 | case 3: | |
134 | mode = B43_INTERFMODE_AUTOWLAN; | |
135 | break; | |
136 | default: | |
137 | return -EINVAL; | |
138 | } | |
139 | ||
140 | mutex_lock(&wldev->wl->mutex); | |
141 | spin_lock_irqsave(&wldev->wl->irq_lock, flags); | |
142 | ||
143 | err = b43_radio_set_interference_mitigation(wldev, mode); | |
144 | if (err) { | |
145 | b43err(wldev->wl, "Interference Mitigation not " | |
146 | "supported by device\n"); | |
147 | } | |
148 | mmiowb(); | |
149 | spin_unlock_irqrestore(&wldev->wl->irq_lock, flags); | |
150 | mutex_unlock(&wldev->wl->mutex); | |
151 | ||
152 | return err ? err : count; | |
153 | } | |
154 | ||
155 | static DEVICE_ATTR(interference, 0644, | |
156 | b43_attr_interfmode_show, b43_attr_interfmode_store); | |
157 | ||
158 | static ssize_t b43_attr_preamble_show(struct device *dev, | |
159 | struct device_attribute *attr, char *buf) | |
160 | { | |
161 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); | |
162 | ssize_t count; | |
163 | ||
164 | if (!capable(CAP_NET_ADMIN)) | |
165 | return -EPERM; | |
166 | ||
167 | mutex_lock(&wldev->wl->mutex); | |
168 | ||
169 | if (wldev->short_preamble) | |
170 | count = | |
171 | snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n"); | |
172 | else | |
173 | count = | |
174 | snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n"); | |
175 | ||
176 | mutex_unlock(&wldev->wl->mutex); | |
177 | ||
178 | return count; | |
179 | } | |
180 | ||
181 | static ssize_t b43_attr_preamble_store(struct device *dev, | |
182 | struct device_attribute *attr, | |
183 | const char *buf, size_t count) | |
184 | { | |
185 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); | |
186 | unsigned long flags; | |
187 | int value; | |
188 | ||
189 | if (!capable(CAP_NET_ADMIN)) | |
190 | return -EPERM; | |
191 | ||
192 | value = get_boolean(buf, count); | |
193 | if (value < 0) | |
194 | return value; | |
195 | mutex_lock(&wldev->wl->mutex); | |
196 | spin_lock_irqsave(&wldev->wl->irq_lock, flags); | |
197 | ||
198 | wldev->short_preamble = !!value; | |
199 | ||
200 | spin_unlock_irqrestore(&wldev->wl->irq_lock, flags); | |
201 | mutex_unlock(&wldev->wl->mutex); | |
202 | ||
203 | return count; | |
204 | } | |
205 | ||
206 | static DEVICE_ATTR(shortpreamble, 0644, | |
207 | b43_attr_preamble_show, b43_attr_preamble_store); | |
208 | ||
209 | int b43_sysfs_register(struct b43_wldev *wldev) | |
210 | { | |
211 | struct device *dev = wldev->dev->dev; | |
212 | int err; | |
213 | ||
214 | B43_WARN_ON(b43_status(wldev) != B43_STAT_INITIALIZED); | |
215 | ||
216 | err = device_create_file(dev, &dev_attr_interference); | |
217 | if (err) | |
218 | goto out; | |
219 | err = device_create_file(dev, &dev_attr_shortpreamble); | |
220 | if (err) | |
221 | goto err_remove_interfmode; | |
222 | ||
223 | out: | |
224 | return err; | |
225 | err_remove_interfmode: | |
226 | device_remove_file(dev, &dev_attr_interference); | |
227 | goto out; | |
228 | } | |
229 | ||
230 | void b43_sysfs_unregister(struct b43_wldev *wldev) | |
231 | { | |
232 | struct device *dev = wldev->dev->dev; | |
233 | ||
234 | device_remove_file(dev, &dev_attr_shortpreamble); | |
235 | device_remove_file(dev, &dev_attr_interference); | |
236 | } |