![Silvan Jegen](/assets/img/avatar_default.png)
Instead of an explicit cast, use the min_t macro. Signed-off-by: Silvan Jegen <s.jegen@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
156 lines
3.4 KiB
C
156 lines
3.4 KiB
C
/*
|
|
|
|
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_t(size_t, count, 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->dev->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->dev->dev;
|
|
|
|
device_remove_file(dev, &dev_attr_interference);
|
|
}
|