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>
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Dmitry Eremin-Solenikov
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include/net/wpan-phy.h
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63
include/net/wpan-phy.h
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/*
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* Copyright (C) 2007, 2008, 2009 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Written by:
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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*/
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#ifndef WPAN_PHY_H
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#define WPAN_PHY_H
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#include <linux/netdevice.h>
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#include <linux/mutex.h>
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struct wpan_phy {
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struct mutex pib_lock;
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/*
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* This is a PIB acording to 802.15.4-2006.
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* We do not provide timing-related variables, as they
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* aren't used outside of driver
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*/
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u8 current_channel;
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u8 current_page;
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u32 channels_supported;
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u8 transmit_power;
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u8 cca_mode;
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struct device dev;
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int idx;
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char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
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};
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struct wpan_phy *wpan_phy_alloc(size_t priv_size);
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int wpan_phy_register(struct device *parent, struct wpan_phy *phy);
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void wpan_phy_unregister(struct wpan_phy *phy);
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void wpan_phy_free(struct wpan_phy *phy);
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static inline void *wpan_phy_priv(struct wpan_phy *phy)
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{
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BUG_ON(!phy);
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return &phy->priv;
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}
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struct wpan_phy *wpan_phy_find(const char *str);
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static inline const char *wpan_phy_name(struct wpan_phy *phy)
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{
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return dev_name(&phy->dev);
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}
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#endif
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@ -1,4 +1,4 @@
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obj-$(CONFIG_IEEE802154) += nl802154.o af_802154.o
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obj-$(CONFIG_IEEE802154) += nl802154.o af_802154.o wpan-class.o
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nl802154-y := netlink.o nl_policy.o
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af_802154-y := af_ieee802154.o raw.o dgram.o
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159
net/ieee802154/wpan-class.c
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159
net/ieee802154/wpan-class.c
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/*
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* Copyright (C) 2007, 2008, 2009 Siemens AG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <net/wpan-phy.h>
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#define MASTER_SHOW_COMPLEX(name, format_string, args...) \
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static ssize_t name ## _show(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct wpan_phy *phy = container_of(dev, struct wpan_phy, dev); \
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int ret; \
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\
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mutex_lock(&phy->pib_lock); \
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ret = sprintf(buf, format_string "\n", args); \
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mutex_unlock(&phy->pib_lock); \
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return ret; \
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}
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#define MASTER_SHOW(field, format_string) \
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MASTER_SHOW_COMPLEX(field, format_string, phy->field)
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MASTER_SHOW(current_channel, "%d");
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MASTER_SHOW(current_page, "%d");
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MASTER_SHOW(channels_supported, "%#x");
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MASTER_SHOW_COMPLEX(transmit_power, "%d +- %d dB",
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((signed char) (phy->transmit_power << 2)) >> 2,
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(phy->transmit_power >> 6) ? (phy->transmit_power >> 6) * 3 : 1 );
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MASTER_SHOW(cca_mode, "%d");
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static struct device_attribute pmib_attrs[] = {
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__ATTR_RO(current_channel),
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__ATTR_RO(current_page),
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__ATTR_RO(channels_supported),
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__ATTR_RO(transmit_power),
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__ATTR_RO(cca_mode),
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{},
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};
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static void wpan_phy_release(struct device *d)
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{
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struct wpan_phy *phy = container_of(d, struct wpan_phy, dev);
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kfree(phy);
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}
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static struct class wpan_phy_class = {
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.name = "ieee802154",
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.dev_release = wpan_phy_release,
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.dev_attrs = pmib_attrs,
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};
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static DEFINE_MUTEX(wpan_phy_mutex);
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static int wpan_phy_idx;
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static int wpan_phy_match(struct device *dev, void *data)
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{
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return !strcmp(dev_name(dev), (const char *)data);
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}
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struct wpan_phy *wpan_phy_find(const char *str)
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{
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struct device *dev;
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if (WARN_ON(!str))
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return NULL;
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dev = class_find_device(&wpan_phy_class, NULL,
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(void *)str, wpan_phy_match);
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if (!dev)
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return NULL;
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return container_of(dev, struct wpan_phy, dev);
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}
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EXPORT_SYMBOL(wpan_phy_find);
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static int wpan_phy_idx_valid(int idx)
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{
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return idx >= 0;
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}
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struct wpan_phy *wpan_phy_alloc(size_t priv_size)
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{
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struct wpan_phy *phy = kzalloc(sizeof(*phy) + priv_size,
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GFP_KERNEL);
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mutex_lock(&wpan_phy_mutex);
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phy->idx = wpan_phy_idx++;
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if (unlikely(!wpan_phy_idx_valid(phy->idx))) {
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wpan_phy_idx--;
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mutex_unlock(&wpan_phy_mutex);
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kfree(phy);
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return NULL;
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}
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mutex_unlock(&wpan_phy_mutex);
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mutex_init(&phy->pib_lock);
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device_initialize(&phy->dev);
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dev_set_name(&phy->dev, "wpan-phy%d", phy->idx);
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phy->dev.class = &wpan_phy_class;
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return phy;
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}
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EXPORT_SYMBOL(wpan_phy_alloc);
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int wpan_phy_register(struct device *parent, struct wpan_phy *phy)
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{
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phy->dev.parent = parent;
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return device_add(&phy->dev);
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}
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EXPORT_SYMBOL(wpan_phy_register);
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void wpan_phy_unregister(struct wpan_phy *phy)
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{
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device_del(&phy->dev);
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}
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EXPORT_SYMBOL(wpan_phy_unregister);
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void wpan_phy_free(struct wpan_phy *phy)
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{
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put_device(&phy->dev);
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}
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EXPORT_SYMBOL(wpan_phy_free);
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static int __init wpan_phy_class_init(void)
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{
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return class_register(&wpan_phy_class);
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}
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subsys_initcall(wpan_phy_class_init);
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static void __exit wpan_phy_class_exit(void)
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{
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class_unregister(&wpan_phy_class);
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}
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module_exit(wpan_phy_class_exit);
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MODULE_DESCRIPTION("IEEE 802.15.4 device class");
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MODULE_LICENSE("GPL v2");
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