1 /*
2
3 Broadcom B43legacy wireless driver
4
5 SYSFS support routines
6
7 Copyright (c) 2006 Michael Buesch <m@bues.ch>
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
26 #include "sysfs.h"
27 #include "b43legacy.h"
28 #include "main.h"
29 #include "phy.h"
30 #include "radio.h"
31
32 #include <linux/capability.h>
33
34
35 #define GENERIC_FILESIZE 64
36
37
get_integer(const char * buf,size_t count)38 static int get_integer(const char *buf, size_t count)
39 {
40 char tmp[10 + 1] = { 0 };
41 int ret = -EINVAL;
42
43 if (count == 0)
44 goto out;
45 count = min(count, (size_t)10);
46 memcpy(tmp, buf, count);
47 ret = simple_strtol(tmp, NULL, 10);
48 out:
49 return ret;
50 }
51
get_boolean(const char * buf,size_t count)52 static int get_boolean(const char *buf, size_t count)
53 {
54 if (count != 0) {
55 if (buf[0] == '1')
56 return 1;
57 if (buf[0] == '0')
58 return 0;
59 if (count >= 4 && memcmp(buf, "true", 4) == 0)
60 return 1;
61 if (count >= 5 && memcmp(buf, "false", 5) == 0)
62 return 0;
63 if (count >= 3 && memcmp(buf, "yes", 3) == 0)
64 return 1;
65 if (count >= 2 && memcmp(buf, "no", 2) == 0)
66 return 0;
67 if (count >= 2 && memcmp(buf, "on", 2) == 0)
68 return 1;
69 if (count >= 3 && memcmp(buf, "off", 3) == 0)
70 return 0;
71 }
72 return -EINVAL;
73 }
74
b43legacy_attr_interfmode_show(struct device * dev,struct device_attribute * attr,char * buf)75 static ssize_t b43legacy_attr_interfmode_show(struct device *dev,
76 struct device_attribute *attr,
77 char *buf)
78 {
79 struct b43legacy_wldev *wldev = dev_to_b43legacy_wldev(dev);
80 ssize_t count = 0;
81
82 if (!capable(CAP_NET_ADMIN))
83 return -EPERM;
84
85 mutex_lock(&wldev->wl->mutex);
86
87 switch (wldev->phy.interfmode) {
88 case B43legacy_INTERFMODE_NONE:
89 count = snprintf(buf, PAGE_SIZE, "0 (No Interference"
90 " Mitigation)\n");
91 break;
92 case B43legacy_INTERFMODE_NONWLAN:
93 count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference"
94 " Mitigation)\n");
95 break;
96 case B43legacy_INTERFMODE_MANUALWLAN:
97 count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference"
98 " Mitigation)\n");
99 break;
100 default:
101 B43legacy_WARN_ON(1);
102 }
103
104 mutex_unlock(&wldev->wl->mutex);
105
106 return count;
107 }
108
b43legacy_attr_interfmode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)109 static ssize_t b43legacy_attr_interfmode_store(struct device *dev,
110 struct device_attribute *attr,
111 const char *buf, size_t count)
112 {
113 struct b43legacy_wldev *wldev = dev_to_b43legacy_wldev(dev);
114 unsigned long flags;
115 int err;
116 int mode;
117
118 if (!capable(CAP_NET_ADMIN))
119 return -EPERM;
120
121 mode = get_integer(buf, count);
122 switch (mode) {
123 case 0:
124 mode = B43legacy_INTERFMODE_NONE;
125 break;
126 case 1:
127 mode = B43legacy_INTERFMODE_NONWLAN;
128 break;
129 case 2:
130 mode = B43legacy_INTERFMODE_MANUALWLAN;
131 break;
132 case 3:
133 mode = B43legacy_INTERFMODE_AUTOWLAN;
134 break;
135 default:
136 return -EINVAL;
137 }
138
139 mutex_lock(&wldev->wl->mutex);
140 spin_lock_irqsave(&wldev->wl->irq_lock, flags);
141
142 err = b43legacy_radio_set_interference_mitigation(wldev, mode);
143 if (err)
144 b43legacyerr(wldev->wl, "Interference Mitigation not "
145 "supported by device\n");
146 mmiowb();
147 spin_unlock_irqrestore(&wldev->wl->irq_lock, flags);
148 mutex_unlock(&wldev->wl->mutex);
149
150 return err ? err : count;
151 }
152
153 static DEVICE_ATTR(interference, 0644,
154 b43legacy_attr_interfmode_show,
155 b43legacy_attr_interfmode_store);
156
b43legacy_attr_preamble_show(struct device * dev,struct device_attribute * attr,char * buf)157 static ssize_t b43legacy_attr_preamble_show(struct device *dev,
158 struct device_attribute *attr,
159 char *buf)
160 {
161 struct b43legacy_wldev *wldev = dev_to_b43legacy_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 = snprintf(buf, PAGE_SIZE, "1 (Short Preamble"
171 " enabled)\n");
172 else
173 count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble"
174 " disabled)\n");
175
176 mutex_unlock(&wldev->wl->mutex);
177
178 return count;
179 }
180
b43legacy_attr_preamble_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)181 static ssize_t b43legacy_attr_preamble_store(struct device *dev,
182 struct device_attribute *attr,
183 const char *buf, size_t count)
184 {
185 struct b43legacy_wldev *wldev = dev_to_b43legacy_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 b43legacy_attr_preamble_show,
208 b43legacy_attr_preamble_store);
209
b43legacy_sysfs_register(struct b43legacy_wldev * wldev)210 int b43legacy_sysfs_register(struct b43legacy_wldev *wldev)
211 {
212 struct device *dev = wldev->dev->dev;
213 int err;
214
215 B43legacy_WARN_ON(b43legacy_status(wldev) !=
216 B43legacy_STAT_INITIALIZED);
217
218 err = device_create_file(dev, &dev_attr_interference);
219 if (err)
220 goto out;
221 err = device_create_file(dev, &dev_attr_shortpreamble);
222 if (err)
223 goto err_remove_interfmode;
224
225 out:
226 return err;
227 err_remove_interfmode:
228 device_remove_file(dev, &dev_attr_interference);
229 goto out;
230 }
231
b43legacy_sysfs_unregister(struct b43legacy_wldev * wldev)232 void b43legacy_sysfs_unregister(struct b43legacy_wldev *wldev)
233 {
234 struct device *dev = wldev->dev->dev;
235
236 device_remove_file(dev, &dev_attr_shortpreamble);
237 device_remove_file(dev, &dev_attr_interference);
238 }
239