[B43]: add mac80211-based driver for modern BCM43xx devices

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/b43/sysfs.c

@@ -0,0 +1,235 @@
+/*
+
+  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);
+}