2 * Copyright (C) 2007-2012 Siemens AG
5 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
7 * Based on the code from 'linux-zigbee.sourceforge.net' project.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/netdevice.h>
27 #include <net/netlink.h>
28 #include <linux/nl802154.h>
29 #include <net/mac802154.h>
30 #include <net/route.h>
31 #include <net/wpan-phy.h>
33 #include "mac802154.h"
35 int mac802154_slave_open(struct net_device *dev)
37 struct mac802154_sub_if_data *priv = netdev_priv(dev);
38 struct mac802154_priv *ipriv = priv->hw;
41 if (ipriv->open_count++ == 0) {
42 res = ipriv->ops->start(&ipriv->hw);
48 if (ipriv->ops->ieee_addr) {
49 res = ipriv->ops->ieee_addr(&ipriv->hw, dev->dev_addr);
53 mac802154_dev_set_ieee_addr(dev);
56 netif_start_queue(dev);
59 priv->hw->open_count--;
64 int mac802154_slave_close(struct net_device *dev)
66 struct mac802154_sub_if_data *priv = netdev_priv(dev);
67 struct mac802154_priv *ipriv = priv->hw;
69 netif_stop_queue(dev);
71 if (!--ipriv->open_count)
72 ipriv->ops->stop(&ipriv->hw);
78 mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
80 struct mac802154_sub_if_data *priv;
81 struct mac802154_priv *ipriv;
84 ipriv = wpan_phy_priv(phy);
86 priv = netdev_priv(dev);
90 dev->needed_headroom = ipriv->hw.extra_tx_headroom;
92 SET_NETDEV_DEV(dev, &ipriv->phy->dev);
94 mutex_lock(&ipriv->slaves_mtx);
95 if (!ipriv->running) {
96 mutex_unlock(&ipriv->slaves_mtx);
99 mutex_unlock(&ipriv->slaves_mtx);
101 err = register_netdev(dev);
106 mutex_lock(&ipriv->slaves_mtx);
107 list_add_tail_rcu(&priv->list, &ipriv->slaves);
108 mutex_unlock(&ipriv->slaves_mtx);
115 mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
117 struct mac802154_sub_if_data *sdata;
120 sdata = netdev_priv(dev);
122 BUG_ON(sdata->hw->phy != phy);
124 mutex_lock(&sdata->hw->slaves_mtx);
125 list_del_rcu(&sdata->list);
126 mutex_unlock(&sdata->hw->slaves_mtx);
129 unregister_netdevice(sdata->dev);
132 static struct net_device *
133 mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
135 struct net_device *dev;
139 case IEEE802154_DEV_MONITOR:
140 dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
141 name, mac802154_monitor_setup);
151 err = mac802154_netdev_register(phy, dev);
155 dev_hold(dev); /* we return an incremented device refcount */
164 struct ieee802154_dev *
165 ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
167 struct wpan_phy *phy;
168 struct mac802154_priv *priv;
171 if (!ops || !ops->xmit || !ops->ed || !ops->start ||
172 !ops->stop || !ops->set_channel) {
174 "undefined IEEE802.15.4 device operations\n");
178 /* Ensure 32-byte alignment of our private data and hw private data.
179 * We use the wpan_phy priv data for both our mac802154_priv and for
180 * the driver's private data
182 * in memory it'll be like this:
184 * +-----------------------+
185 * | struct wpan_phy |
186 * +-----------------------+
187 * | struct mac802154_priv |
188 * +-----------------------+
189 * | driver's private data |
190 * +-----------------------+
192 * Due to ieee802154 layer isn't aware of driver and MAC structures,
193 * so lets allign them here.
196 priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
198 phy = wpan_phy_alloc(priv_size);
201 "failure to allocate master IEEE802.15.4 device\n");
205 priv = wpan_phy_priv(phy);
206 priv->hw.phy = priv->phy = phy;
207 priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
210 INIT_LIST_HEAD(&priv->slaves);
211 mutex_init(&priv->slaves_mtx);
215 EXPORT_SYMBOL(ieee802154_alloc_device);
217 void ieee802154_free_device(struct ieee802154_dev *hw)
219 struct mac802154_priv *priv = mac802154_to_priv(hw);
221 BUG_ON(!list_empty(&priv->slaves));
223 wpan_phy_free(priv->phy);
225 mutex_destroy(&priv->slaves_mtx);
227 EXPORT_SYMBOL(ieee802154_free_device);
229 int ieee802154_register_device(struct ieee802154_dev *dev)
231 struct mac802154_priv *priv = mac802154_to_priv(dev);
234 priv->dev_workqueue =
235 create_singlethread_workqueue(wpan_phy_name(priv->phy));
236 if (!priv->dev_workqueue)
239 wpan_phy_set_dev(priv->phy, priv->hw.parent);
241 priv->phy->add_iface = mac802154_add_iface;
242 priv->phy->del_iface = mac802154_del_iface;
244 rc = wpan_phy_register(priv->phy);
250 mutex_lock(&priv->slaves_mtx);
251 priv->running = MAC802154_DEVICE_RUN;
252 mutex_unlock(&priv->slaves_mtx);
259 destroy_workqueue(priv->dev_workqueue);
263 EXPORT_SYMBOL(ieee802154_register_device);
265 void ieee802154_unregister_device(struct ieee802154_dev *dev)
267 struct mac802154_priv *priv = mac802154_to_priv(dev);
268 struct mac802154_sub_if_data *sdata, *next;
270 flush_workqueue(priv->dev_workqueue);
271 destroy_workqueue(priv->dev_workqueue);
275 mutex_lock(&priv->slaves_mtx);
276 priv->running = MAC802154_DEVICE_STOPPED;
277 mutex_unlock(&priv->slaves_mtx);
279 list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
280 mutex_lock(&sdata->hw->slaves_mtx);
281 list_del(&sdata->list);
282 mutex_unlock(&sdata->hw->slaves_mtx);
284 unregister_netdevice(sdata->dev);
289 wpan_phy_unregister(priv->phy);
291 EXPORT_SYMBOL(ieee802154_unregister_device);
293 MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
294 MODULE_LICENSE("GPL v2");