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/*
Broadcom B43 wireless driver
SYSFS support routines
Copyright (c) 2006 Michael Buesch <mb@bu3sch.de>
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 "b43.h"
#include "sysfs.h"
#include "main.h"
#include "phy.h"
#include <linux/capability.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 int get_boolean(const char *buf, size_t count)
{
if (count != 0) {
if (buf[0] == '1')
return 1;
if (buf[0] == '0')
return 0;
if (count >= 4 && memcmp(buf, "true", 4) == 0)
return 1;
if (count >= 5 && memcmp(buf, "false", 5) == 0)
return 0;
if (count >= 3 && memcmp(buf, "yes", 3) == 0)
return 1;
if (count >= 2 && memcmp(buf, "no", 2) == 0)
return 0;
if (count >= 2 && memcmp(buf, "on", 2) == 0)
return 1;
if (count >= 3 && memcmp(buf, "off", 3) == 0)
return 0;
}
return -EINVAL;
}
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);
switch (wldev->phy.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);
unsigned long flags;
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);
spin_lock_irqsave(&wldev->wl->irq_lock, flags);
err = b43_radio_set_interference_mitigation(wldev, mode);
if (err) {
b43err(wldev->wl, "Interference Mitigation not "
"supported by device\n");
}
mmiowb();
spin_unlock_irqrestore(&wldev->wl->irq_lock, flags);
mutex_unlock(&wldev->wl->mutex);
return err ? err : count;
}
static DEVICE_ATTR(interference, 0644,
b43_attr_interfmode_show, b43_attr_interfmode_store);
static ssize_t b43_attr_preamble_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct b43_wldev *wldev = dev_to_b43_wldev(dev);
ssize_t count;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
mutex_lock(&wldev->wl->mutex);
if (wldev->short_preamble)
count =
snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
else
count =
snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
mutex_unlock(&wldev->wl->mutex);
return count;
}
static ssize_t b43_attr_preamble_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct b43_wldev *wldev = dev_to_b43_wldev(dev);
unsigned long flags;
int value;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
value = get_boolean(buf, count);
if (value < 0)
return value;
mutex_lock(&wldev->wl->mutex);
spin_lock_irqsave(&wldev->wl->irq_lock, flags);
wldev->short_preamble = !!value;
spin_unlock_irqrestore(&wldev->wl->irq_lock, flags);
mutex_unlock(&wldev->wl->mutex);
return count;
}
static DEVICE_ATTR(shortpreamble, 0644,
b43_attr_preamble_show, b43_attr_preamble_store);
int b43_sysfs_register(struct b43_wldev *wldev)
{
struct device *dev = wldev->dev->dev;
int err;
B43_WARN_ON(b43_status(wldev) != B43_STAT_INITIALIZED);
err = device_create_file(dev, &dev_attr_interference);
if (err)
goto out;
err = device_create_file(dev, &dev_attr_shortpreamble);
if (err)
goto err_remove_interfmode;
out:
return err;
err_remove_interfmode:
device_remove_file(dev, &dev_attr_interference);
goto out;
}
void b43_sysfs_unregister(struct b43_wldev *wldev)
{
struct device *dev = wldev->dev->dev;
device_remove_file(dev, &dev_attr_shortpreamble);
device_remove_file(dev, &dev_attr_interference);
}
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