1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/b43/sysfs.c b/drivers/net/wireless/broadcom/b43/sysfs.c
new file mode 100644
index 000000000..0679d1329
--- /dev/null
+++ b/drivers/net/wireless/broadcom/b43/sysfs.c
@@ -0,0 +1,141 @@
+// 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);
+}