linux/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c

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/*
Broadcom BCM43xx wireless driver
SYSFS support routines
Copyright (c) 2006 Michael Buesch <mbuesch@freenet.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 "bcm43xx_sysfs.h"
#include "bcm43xx.h"
#include "bcm43xx_main.h"
#include "bcm43xx_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 int sprom2hex(const u16 *sprom, char *buf, size_t buf_len)
{
int i, pos = 0;
for (i = 0; i < BCM43xx_SPROM_SIZE; i++) {
pos += snprintf(buf + pos, buf_len - pos - 1,
"%04X", swab16(sprom[i]) & 0xFFFF);
}
pos += snprintf(buf + pos, buf_len - pos - 1, "\n");
return pos + 1;
}
static int hex2sprom(u16 *sprom, const char *dump, size_t len)
{
char tmp[5] = { 0 };
int cnt = 0;
unsigned long parsed;
if (len < BCM43xx_SPROM_SIZE * sizeof(u16) * 2)
return -EINVAL;
while (cnt < BCM43xx_SPROM_SIZE) {
memcpy(tmp, dump, 4);
dump += 4;
parsed = simple_strtoul(tmp, NULL, 16);
sprom[cnt++] = swab16((u16)parsed);
}
return 0;
}
static ssize_t bcm43xx_attr_sprom_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
u16 *sprom;
unsigned long flags;
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
assert(BCM43xx_SPROM_SIZE * sizeof(u16) <= PAGE_SIZE);
sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
GFP_KERNEL);
if (!sprom)
return -ENOMEM;
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
err = bcm43xx_sprom_read(bcm, sprom);
if (!err)
err = sprom2hex(sprom, buf, PAGE_SIZE);
mmiowb();
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
kfree(sprom);
return err;
}
static ssize_t bcm43xx_attr_sprom_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
u16 *sprom;
unsigned long flags;
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
GFP_KERNEL);
if (!sprom)
return -ENOMEM;
err = hex2sprom(sprom, buf, count);
if (err)
goto out_kfree;
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
spin_lock(&bcm->leds_lock);
err = bcm43xx_sprom_write(bcm, sprom);
mmiowb();
spin_unlock(&bcm->leds_lock);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
out_kfree:
kfree(sprom);
return err ? err : count;
}
static DEVICE_ATTR(sprom, 0600,
bcm43xx_attr_sprom_show,
bcm43xx_attr_sprom_store);
static ssize_t bcm43xx_attr_interfmode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
int err;
ssize_t count = 0;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
mutex_lock(&bcm->mutex);
switch (bcm43xx_current_radio(bcm)->interfmode) {
case BCM43xx_RADIO_INTERFMODE_NONE:
count = snprintf(buf, PAGE_SIZE, "0 (No Interference Mitigation)\n");
break;
case BCM43xx_RADIO_INTERFMODE_NONWLAN:
count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference Mitigation)\n");
break;
case BCM43xx_RADIO_INTERFMODE_MANUALWLAN:
count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference Mitigation)\n");
break;
default:
assert(0);
}
err = 0;
mutex_unlock(&bcm->mutex);
return err ? err : count;
}
static ssize_t bcm43xx_attr_interfmode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bcm43xx_private *bcm = dev_to_bcm(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 = BCM43xx_RADIO_INTERFMODE_NONE;
break;
case 1:
mode = BCM43xx_RADIO_INTERFMODE_NONWLAN;
break;
case 2:
mode = BCM43xx_RADIO_INTERFMODE_MANUALWLAN;
break;
case 3:
mode = BCM43xx_RADIO_INTERFMODE_AUTOWLAN;
break;
default:
return -EINVAL;
}
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
if (err) {
printk(KERN_ERR PFX "Interference Mitigation not "
"supported by device\n");
}
mmiowb();
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err ? err : count;
}
static DEVICE_ATTR(interference, 0644,
bcm43xx_attr_interfmode_show,
bcm43xx_attr_interfmode_store);
static ssize_t bcm43xx_attr_preamble_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
int err;
ssize_t count;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
mutex_lock(&bcm->mutex);
if (bcm->short_preamble)
count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
else
count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
err = 0;
mutex_unlock(&bcm->mutex);
return err ? err : count;
}
static ssize_t bcm43xx_attr_preamble_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
unsigned long flags;
int err;
int value;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
value = get_boolean(buf, count);
if (value < 0)
return value;
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
bcm->short_preamble = !!value;
err = 0;
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err ? err : count;
}
static DEVICE_ATTR(shortpreamble, 0644,
bcm43xx_attr_preamble_show,
bcm43xx_attr_preamble_store);
static ssize_t bcm43xx_attr_phymode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
int phytype;
int err = -EINVAL;
if (count < 1)
goto out;
switch (buf[0]) {
case 'a': case 'A':
phytype = BCM43xx_PHYTYPE_A;
break;
case 'b': case 'B':
phytype = BCM43xx_PHYTYPE_B;
break;
case 'g': case 'G':
phytype = BCM43xx_PHYTYPE_G;
break;
default:
goto out;
}
bcm43xx_lock_noirq(bcm);
err = bcm43xx_select_wireless_core(bcm, phytype);
bcm43xx_unlock_noirq(bcm);
if (err == -ESRCH)
err = -ENODEV;
out:
return err ? err : count;
}
static ssize_t bcm43xx_attr_phymode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct bcm43xx_private *bcm = dev_to_bcm(dev);
ssize_t count = 0;
bcm43xx_lock_noirq(bcm);
switch (bcm43xx_current_phy(bcm)->type) {
case BCM43xx_PHYTYPE_A:
snprintf(buf, PAGE_SIZE, "A");
break;
case BCM43xx_PHYTYPE_B:
snprintf(buf, PAGE_SIZE, "B");
break;
case BCM43xx_PHYTYPE_G:
snprintf(buf, PAGE_SIZE, "G");
break;
default:
assert(0);
}
bcm43xx_unlock_noirq(bcm);
return count;
}
static DEVICE_ATTR(phymode, 0644,
bcm43xx_attr_phymode_show,
bcm43xx_attr_phymode_store);
int bcm43xx_sysfs_register(struct bcm43xx_private *bcm)
{
struct device *dev = &bcm->pci_dev->dev;
int err;
assert(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
err = device_create_file(dev, &dev_attr_sprom);
if (err)
goto out;
err = device_create_file(dev, &dev_attr_interference);
if (err)
goto err_remove_sprom;
err = device_create_file(dev, &dev_attr_shortpreamble);
if (err)
goto err_remove_interfmode;
err = device_create_file(dev, &dev_attr_phymode);
if (err)
goto err_remove_shortpreamble;
out:
return err;
err_remove_shortpreamble:
device_remove_file(dev, &dev_attr_shortpreamble);
err_remove_interfmode:
device_remove_file(dev, &dev_attr_interference);
err_remove_sprom:
device_remove_file(dev, &dev_attr_sprom);
goto out;
}
void bcm43xx_sysfs_unregister(struct bcm43xx_private *bcm)
{
struct device *dev = &bcm->pci_dev->dev;
device_remove_file(dev, &dev_attr_phymode);
device_remove_file(dev, &dev_attr_shortpreamble);
device_remove_file(dev, &dev_attr_interference);
device_remove_file(dev, &dev_attr_sprom);
}