summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/b43/sysfs.c
blob: 1fba982cd63502a34f3a0d655752e9b39887ec72 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*

  Broadcom B43 wireless driver

  SYSFS support routines

  Copyright (c) 2006 Michael Buesch <m@bues.ch>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; see the file COPYING.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  Boston, MA 02110-1301, USA.

*/

#include <linux/capability.h>
#include <linux/io.h>

#include "b43.h"
#include "sysfs.h"
#include "main.h"
#include "phy_common.h"

#define GENERIC_FILESIZE	64

static int get_integer(const char *buf, size_t count)
{
	char tmp[10 + 1] = { 0 };
	int ret = -EINVAL;

	if (count == 0)
		goto out;
	count = min(count, (size_t) 10);
	memcpy(tmp, buf, count);
	ret = simple_strtol(tmp, NULL, 10);
      out:
	return ret;
}

static ssize_t b43_attr_interfmode_show(struct device *dev,
					struct device_attribute *attr,
					char *buf)
{
	struct b43_wldev *wldev = dev_to_b43_wldev(dev);
	ssize_t count = 0;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	mutex_lock(&wldev->wl->mutex);

	if (wldev->phy.type != B43_PHYTYPE_G) {
		mutex_unlock(&wldev->wl->mutex);
		return -ENOSYS;
	}

	switch (wldev->phy.g->interfmode) {
	case B43_INTERFMODE_NONE:
		count =
		    snprintf(buf, PAGE_SIZE,
			     "0 (No Interference Mitigation)\n");
		break;
	case B43_INTERFMODE_NONWLAN:
		count =
		    snprintf(buf, PAGE_SIZE,
			     "1 (Non-WLAN Interference Mitigation)\n");
		break;
	case B43_INTERFMODE_MANUALWLAN:
		count =
		    snprintf(buf, PAGE_SIZE,
			     "2 (WLAN Interference Mitigation)\n");
		break;
	default:
		B43_WARN_ON(1);
	}

	mutex_unlock(&wldev->wl->mutex);

	return count;
}

static ssize_t b43_attr_interfmode_store(struct device *dev,
					 struct device_attribute *attr,
					 const char *buf, size_t count)
{
	struct b43_wldev *wldev = dev_to_b43_wldev(dev);
	int err;
	int mode;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	mode = get_integer(buf, count);
	switch (mode) {
	case 0:
		mode = B43_INTERFMODE_NONE;
		break;
	case 1:
		mode = B43_INTERFMODE_NONWLAN;
		break;
	case 2:
		mode = B43_INTERFMODE_MANUALWLAN;
		break;
	case 3:
		mode = B43_INTERFMODE_AUTOWLAN;
		break;
	default:
		return -EINVAL;
	}

	mutex_lock(&wldev->wl->mutex);

	if (wldev->phy.ops->interf_mitigation) {
		err = wldev->phy.ops->interf_mitigation(wldev, mode);
		if (err) {
			b43err(wldev->wl, "Interference Mitigation not "
			       "supported by device\n");
		}
	} else
		err = -ENOSYS;

	mmiowb();
	mutex_unlock(&wldev->wl->mutex);

	return err ? err : count;
}

static DEVICE_ATTR(interference, 0644,
		   b43_attr_interfmode_show, b43_attr_interfmode_store);

int b43_sysfs_register(struct b43_wldev *wldev)
{
	struct device *dev = wldev->sdev->dev;

	B43_WARN_ON(b43_status(wldev) != B43_STAT_INITIALIZED);

	return device_create_file(dev, &dev_attr_interference);
}

void b43_sysfs_unregister(struct b43_wldev *wldev)
{
	struct device *dev = wldev->sdev->dev;

	device_remove_file(dev, &dev_attr_interference);
}