diff options
Diffstat (limited to 'drivers/net/wireless/b43legacy/sysfs.c')
| -rw-r--r-- | drivers/net/wireless/b43legacy/sysfs.c | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43legacy/sysfs.c b/drivers/net/wireless/b43legacy/sysfs.c new file mode 100644 index 00000000000..56c384fa9b1 --- /dev/null +++ b/drivers/net/wireless/b43legacy/sysfs.c @@ -0,0 +1,238 @@ +/* + + Broadcom B43legacy 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 "sysfs.h" +#include "b43legacy.h" +#include "main.h" +#include "phy.h" +#include "radio.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 b43legacy_attr_interfmode_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct b43legacy_wldev *wldev = dev_to_b43legacy_wldev(dev); + ssize_t count = 0; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + mutex_lock(&wldev->wl->mutex); + + switch (wldev->phy.interfmode) { + case B43legacy_INTERFMODE_NONE: + count = snprintf(buf, PAGE_SIZE, "0 (No Interference" + " Mitigation)\n"); + break; + case B43legacy_INTERFMODE_NONWLAN: + count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference" + " Mitigation)\n"); + break; + case B43legacy_INTERFMODE_MANUALWLAN: + count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference" + " Mitigation)\n"); + break; + default: + B43legacy_WARN_ON(1); + } + + mutex_unlock(&wldev->wl->mutex); + + return count; +} + +static ssize_t b43legacy_attr_interfmode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct b43legacy_wldev *wldev = dev_to_b43legacy_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 = B43legacy_INTERFMODE_NONE; + break; + case 1: + mode = B43legacy_INTERFMODE_NONWLAN; + break; + case 2: + mode = B43legacy_INTERFMODE_MANUALWLAN; + break; + case 3: + mode = B43legacy_INTERFMODE_AUTOWLAN; + break; + default: + return -EINVAL; + } + + mutex_lock(&wldev->wl->mutex); + spin_lock_irqsave(&wldev->wl->irq_lock, flags); + + err = b43legacy_radio_set_interference_mitigation(wldev, mode); + if (err) + b43legacyerr(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, + b43legacy_attr_interfmode_show, + b43legacy_attr_interfmode_store); + +static ssize_t b43legacy_attr_preamble_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct b43legacy_wldev *wldev = dev_to_b43legacy_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 b43legacy_attr_preamble_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct b43legacy_wldev *wldev = dev_to_b43legacy_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, + b43legacy_attr_preamble_show, + b43legacy_attr_preamble_store); + +int b43legacy_sysfs_register(struct b43legacy_wldev *wldev) +{ + struct device *dev = wldev->dev->dev; + int err; + + B43legacy_WARN_ON(b43legacy_status(wldev) != + B43legacy_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 b43legacy_sysfs_unregister(struct b43legacy_wldev *wldev) +{ + struct device *dev = wldev->dev->dev; + + device_remove_file(dev, &dev_attr_shortpreamble); + device_remove_file(dev, &dev_attr_interference); +} |