ieee802154: add a sysfs representation of WPAN master devices
Add a sysfs/in-kernel representation of LR-WPAN master devices.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
diff --git a/net/ieee802154/wpan-class.c b/net/ieee802154/wpan-class.c
new file mode 100644
index 0000000..f306604
--- /dev/null
+++ b/net/ieee802154/wpan-class.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2007, 2008, 2009 Siemens AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+
+#include <net/wpan-phy.h>
+
+#define MASTER_SHOW_COMPLEX(name, format_string, args...) \
+static ssize_t name ## _show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \
+ int ret; \
+ \
+ mutex_lock(&phy->pib_lock); \
+ ret = sprintf(buf, format_string "\n", args); \
+ mutex_unlock(&phy->pib_lock); \
+ return ret; \
+}
+
+#define MASTER_SHOW(field, format_string) \
+ MASTER_SHOW_COMPLEX(field, format_string, phy->field)
+
+MASTER_SHOW(current_channel, "%d");
+MASTER_SHOW(current_page, "%d");
+MASTER_SHOW(channels_supported, "%#x");
+MASTER_SHOW_COMPLEX(transmit_power, "%d +- %d dB",
+ ((signed char) (phy->transmit_power << 2)) >> 2,
+ (phy->transmit_power >> 6) ? (phy->transmit_power >> 6) * 3 : 1 );
+MASTER_SHOW(cca_mode, "%d");
+
+static struct device_attribute pmib_attrs[] = {
+ __ATTR_RO(current_channel),
+ __ATTR_RO(current_page),
+ __ATTR_RO(channels_supported),
+ __ATTR_RO(transmit_power),
+ __ATTR_RO(cca_mode),
+ {},
+};
+
+static void wpan_phy_release(struct device *d)
+{
+ struct wpan_phy *phy = container_of(d, struct wpan_phy, dev);
+ kfree(phy);
+}
+
+static struct class wpan_phy_class = {
+ .name = "ieee802154",
+ .dev_release = wpan_phy_release,
+ .dev_attrs = pmib_attrs,
+};
+
+static DEFINE_MUTEX(wpan_phy_mutex);
+static int wpan_phy_idx;
+
+static int wpan_phy_match(struct device *dev, void *data)
+{
+ return !strcmp(dev_name(dev), (const char *)data);
+}
+
+struct wpan_phy *wpan_phy_find(const char *str)
+{
+ struct device *dev;
+
+ if (WARN_ON(!str))
+ return NULL;
+
+ dev = class_find_device(&wpan_phy_class, NULL,
+ (void *)str, wpan_phy_match);
+ if (!dev)
+ return NULL;
+
+ return container_of(dev, struct wpan_phy, dev);
+}
+EXPORT_SYMBOL(wpan_phy_find);
+
+static int wpan_phy_idx_valid(int idx)
+{
+ return idx >= 0;
+}
+
+struct wpan_phy *wpan_phy_alloc(size_t priv_size)
+{
+ struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size,
+ GFP_KERNEL);
+
+ mutex_lock(&wpan_phy_mutex);
+ phy->idx = wpan_phy_idx++;
+ if (unlikely(!wpan_phy_idx_valid(phy->idx))) {
+ wpan_phy_idx--;
+ mutex_unlock(&wpan_phy_mutex);
+ kfree(phy);
+ return NULL;
+ }
+ mutex_unlock(&wpan_phy_mutex);
+
+ mutex_init(&phy->pib_lock);
+
+ device_initialize(&phy->dev);
+ dev_set_name(&phy->dev, "wpan-phy%d", phy->idx);
+
+ phy->dev.class = &wpan_phy_class;
+
+ return phy;
+}
+EXPORT_SYMBOL(wpan_phy_alloc);
+
+int wpan_phy_register(struct device *parent, struct wpan_phy *phy)
+{
+ phy->dev.parent = parent;
+
+ return device_add(&phy->dev);
+}
+EXPORT_SYMBOL(wpan_phy_register);
+
+void wpan_phy_unregister(struct wpan_phy *phy)
+{
+ device_del(&phy->dev);
+}
+EXPORT_SYMBOL(wpan_phy_unregister);
+
+void wpan_phy_free(struct wpan_phy *phy)
+{
+ put_device(&phy->dev);
+}
+EXPORT_SYMBOL(wpan_phy_free);
+
+static int __init wpan_phy_class_init(void)
+{
+ return class_register(&wpan_phy_class);
+}
+subsys_initcall(wpan_phy_class_init);
+
+static void __exit wpan_phy_class_exit(void)
+{
+ class_unregister(&wpan_phy_class);
+}
+module_exit(wpan_phy_class_exit);
+
+MODULE_DESCRIPTION("IEEE 802.15.4 device class");
+MODULE_LICENSE("GPL v2");
+
