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);
143 case IEEE802154_DEV_WPAN:
144 dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
145 name, mac802154_wpan_setup);
155 err = mac802154_netdev_register(phy, dev);
159 dev_hold(dev); /* we return an incremented device refcount */
168 static int mac802154_set_txpower(struct wpan_phy *phy, int db)
170 struct mac802154_priv *priv = wpan_phy_priv(phy);
172 if (!priv->ops->set_txpower)
175 return priv->ops->set_txpower(&priv->hw, db);
178 static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
180 struct mac802154_priv *priv = wpan_phy_priv(phy);
182 if (!priv->ops->set_lbt)
185 return priv->ops->set_lbt(&priv->hw, on);
188 struct ieee802154_dev *
189 ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
191 struct wpan_phy *phy;
192 struct mac802154_priv *priv;
195 if (!ops || !ops->xmit || !ops->ed || !ops->start ||
196 !ops->stop || !ops->set_channel) {
197 pr_err("undefined IEEE802.15.4 device operations\n");
201 /* Ensure 32-byte alignment of our private data and hw private data.
202 * We use the wpan_phy priv data for both our mac802154_priv and for
203 * the driver's private data
205 * in memory it'll be like this:
207 * +-----------------------+
208 * | struct wpan_phy |
209 * +-----------------------+
210 * | struct mac802154_priv |
211 * +-----------------------+
212 * | driver's private data |
213 * +-----------------------+
215 * Due to ieee802154 layer isn't aware of driver and MAC structures,
216 * so lets allign them here.
219 priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
221 phy = wpan_phy_alloc(priv_size);
223 pr_err("failure to allocate master IEEE802.15.4 device\n");
227 priv = wpan_phy_priv(phy);
228 priv->hw.phy = priv->phy = phy;
229 priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
232 INIT_LIST_HEAD(&priv->slaves);
233 mutex_init(&priv->slaves_mtx);
237 EXPORT_SYMBOL(ieee802154_alloc_device);
239 void ieee802154_free_device(struct ieee802154_dev *hw)
241 struct mac802154_priv *priv = mac802154_to_priv(hw);
243 BUG_ON(!list_empty(&priv->slaves));
245 mutex_destroy(&priv->slaves_mtx);
247 wpan_phy_free(priv->phy);
249 EXPORT_SYMBOL(ieee802154_free_device);
251 int ieee802154_register_device(struct ieee802154_dev *dev)
253 struct mac802154_priv *priv = mac802154_to_priv(dev);
256 priv->dev_workqueue =
257 create_singlethread_workqueue(wpan_phy_name(priv->phy));
258 if (!priv->dev_workqueue)
261 wpan_phy_set_dev(priv->phy, priv->hw.parent);
263 priv->phy->add_iface = mac802154_add_iface;
264 priv->phy->del_iface = mac802154_del_iface;
265 priv->phy->set_txpower = mac802154_set_txpower;
266 priv->phy->set_lbt = mac802154_set_lbt;
268 rc = wpan_phy_register(priv->phy);
274 mutex_lock(&priv->slaves_mtx);
275 priv->running = MAC802154_DEVICE_RUN;
276 mutex_unlock(&priv->slaves_mtx);
283 destroy_workqueue(priv->dev_workqueue);
287 EXPORT_SYMBOL(ieee802154_register_device);
289 void ieee802154_unregister_device(struct ieee802154_dev *dev)
291 struct mac802154_priv *priv = mac802154_to_priv(dev);
292 struct mac802154_sub_if_data *sdata, *next;
294 flush_workqueue(priv->dev_workqueue);
295 destroy_workqueue(priv->dev_workqueue);
299 mutex_lock(&priv->slaves_mtx);
300 priv->running = MAC802154_DEVICE_STOPPED;
301 mutex_unlock(&priv->slaves_mtx);
303 list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
304 mutex_lock(&sdata->hw->slaves_mtx);
305 list_del(&sdata->list);
306 mutex_unlock(&sdata->hw->slaves_mtx);
308 unregister_netdevice(sdata->dev);
313 wpan_phy_unregister(priv->phy);
315 EXPORT_SYMBOL(ieee802154_unregister_device);
317 MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
318 MODULE_LICENSE("GPL v2");