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// SPDX-License-Identifier: GPL-2.0-or-later
/*
Broadcom B43 wireless driver
SYSFS support routines
Copyright (c) 2006 Michael Buesch <m@bues.ch>
*/
#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;
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);
}
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