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/ieee802154_netdev.h>
31 #include <net/route.h>
32 #include <net/wpan-phy.h>
34 #include "mac802154.h"
36 int mac802154_slave_open(struct net_device *dev)
38 struct mac802154_sub_if_data *priv = netdev_priv(dev);
39 struct mac802154_priv *ipriv = priv->hw;
42 if (ipriv->open_count++ == 0) {
43 res = ipriv->ops->start(&ipriv->hw);
49 if (ipriv->ops->ieee_addr) {
50 __le64 addr = ieee802154_devaddr_from_raw(dev->dev_addr);
52 res = ipriv->ops->ieee_addr(&ipriv->hw, addr);
56 mac802154_dev_set_ieee_addr(dev);
59 netif_start_queue(dev);
62 priv->hw->open_count--;
67 int mac802154_slave_close(struct net_device *dev)
69 struct mac802154_sub_if_data *priv = netdev_priv(dev);
70 struct mac802154_priv *ipriv = priv->hw;
72 netif_stop_queue(dev);
74 if (!--ipriv->open_count)
75 ipriv->ops->stop(&ipriv->hw);
81 mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
83 struct mac802154_sub_if_data *priv;
84 struct mac802154_priv *ipriv;
87 ipriv = wpan_phy_priv(phy);
89 priv = netdev_priv(dev);
93 dev->needed_headroom = ipriv->hw.extra_tx_headroom;
95 SET_NETDEV_DEV(dev, &ipriv->phy->dev);
97 mutex_lock(&ipriv->slaves_mtx);
98 if (!ipriv->running) {
99 mutex_unlock(&ipriv->slaves_mtx);
102 mutex_unlock(&ipriv->slaves_mtx);
104 err = register_netdev(dev);
109 mutex_lock(&ipriv->slaves_mtx);
110 list_add_tail_rcu(&priv->list, &ipriv->slaves);
111 mutex_unlock(&ipriv->slaves_mtx);
118 mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev)
120 struct mac802154_sub_if_data *sdata;
123 sdata = netdev_priv(dev);
125 BUG_ON(sdata->hw->phy != phy);
127 mutex_lock(&sdata->hw->slaves_mtx);
128 list_del_rcu(&sdata->list);
129 mutex_unlock(&sdata->hw->slaves_mtx);
132 unregister_netdevice(sdata->dev);
135 static struct net_device *
136 mac802154_add_iface(struct wpan_phy *phy, const char *name, int type)
138 struct net_device *dev;
142 case IEEE802154_DEV_MONITOR:
143 dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
144 name, mac802154_monitor_setup);
146 case IEEE802154_DEV_WPAN:
147 dev = alloc_netdev(sizeof(struct mac802154_sub_if_data),
148 name, mac802154_wpan_setup);
158 err = mac802154_netdev_register(phy, dev);
162 dev_hold(dev); /* we return an incremented device refcount */
171 static int mac802154_set_txpower(struct wpan_phy *phy, int db)
173 struct mac802154_priv *priv = wpan_phy_priv(phy);
175 if (!priv->ops->set_txpower)
178 return priv->ops->set_txpower(&priv->hw, db);
181 static int mac802154_set_lbt(struct wpan_phy *phy, bool on)
183 struct mac802154_priv *priv = wpan_phy_priv(phy);
185 if (!priv->ops->set_lbt)
188 return priv->ops->set_lbt(&priv->hw, on);
191 static int mac802154_set_cca_mode(struct wpan_phy *phy, u8 mode)
193 struct mac802154_priv *priv = wpan_phy_priv(phy);
195 if (!priv->ops->set_cca_mode)
198 return priv->ops->set_cca_mode(&priv->hw, mode);
201 static int mac802154_set_cca_ed_level(struct wpan_phy *phy, s32 level)
203 struct mac802154_priv *priv = wpan_phy_priv(phy);
205 if (!priv->ops->set_cca_ed_level)
208 return priv->ops->set_cca_ed_level(&priv->hw, level);
211 static int mac802154_set_csma_params(struct wpan_phy *phy, u8 min_be,
212 u8 max_be, u8 retries)
214 struct mac802154_priv *priv = wpan_phy_priv(phy);
216 if (!priv->ops->set_csma_params)
219 return priv->ops->set_csma_params(&priv->hw, min_be, max_be, retries);
222 static int mac802154_set_frame_retries(struct wpan_phy *phy, s8 retries)
224 struct mac802154_priv *priv = wpan_phy_priv(phy);
226 if (!priv->ops->set_frame_retries)
229 return priv->ops->set_frame_retries(&priv->hw, retries);
232 struct ieee802154_dev *
233 ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops)
235 struct wpan_phy *phy;
236 struct mac802154_priv *priv;
239 if (!ops || !ops->xmit || !ops->ed || !ops->start ||
240 !ops->stop || !ops->set_channel) {
241 pr_err("undefined IEEE802.15.4 device operations\n");
245 /* Ensure 32-byte alignment of our private data and hw private data.
246 * We use the wpan_phy priv data for both our mac802154_priv and for
247 * the driver's private data
249 * in memory it'll be like this:
251 * +-----------------------+
252 * | struct wpan_phy |
253 * +-----------------------+
254 * | struct mac802154_priv |
255 * +-----------------------+
256 * | driver's private data |
257 * +-----------------------+
259 * Due to ieee802154 layer isn't aware of driver and MAC structures,
260 * so lets allign them here.
263 priv_size = ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_data_len;
265 phy = wpan_phy_alloc(priv_size);
267 pr_err("failure to allocate master IEEE802.15.4 device\n");
271 priv = wpan_phy_priv(phy);
272 priv->hw.phy = priv->phy = phy;
273 priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
276 INIT_LIST_HEAD(&priv->slaves);
277 mutex_init(&priv->slaves_mtx);
281 EXPORT_SYMBOL(ieee802154_alloc_device);
283 void ieee802154_free_device(struct ieee802154_dev *hw)
285 struct mac802154_priv *priv = mac802154_to_priv(hw);
287 BUG_ON(!list_empty(&priv->slaves));
289 mutex_destroy(&priv->slaves_mtx);
291 wpan_phy_free(priv->phy);
293 EXPORT_SYMBOL(ieee802154_free_device);
295 int ieee802154_register_device(struct ieee802154_dev *dev)
297 struct mac802154_priv *priv = mac802154_to_priv(dev);
300 priv->dev_workqueue =
301 create_singlethread_workqueue(wpan_phy_name(priv->phy));
302 if (!priv->dev_workqueue)
305 wpan_phy_set_dev(priv->phy, priv->hw.parent);
307 priv->phy->add_iface = mac802154_add_iface;
308 priv->phy->del_iface = mac802154_del_iface;
309 priv->phy->set_txpower = mac802154_set_txpower;
310 priv->phy->set_lbt = mac802154_set_lbt;
311 priv->phy->set_cca_mode = mac802154_set_cca_mode;
312 priv->phy->set_cca_ed_level = mac802154_set_cca_ed_level;
313 priv->phy->set_csma_params = mac802154_set_csma_params;
314 priv->phy->set_frame_retries = mac802154_set_frame_retries;
316 rc = wpan_phy_register(priv->phy);
322 mutex_lock(&priv->slaves_mtx);
323 priv->running = MAC802154_DEVICE_RUN;
324 mutex_unlock(&priv->slaves_mtx);
331 destroy_workqueue(priv->dev_workqueue);
335 EXPORT_SYMBOL(ieee802154_register_device);
337 void ieee802154_unregister_device(struct ieee802154_dev *dev)
339 struct mac802154_priv *priv = mac802154_to_priv(dev);
340 struct mac802154_sub_if_data *sdata, *next;
342 flush_workqueue(priv->dev_workqueue);
343 destroy_workqueue(priv->dev_workqueue);
347 mutex_lock(&priv->slaves_mtx);
348 priv->running = MAC802154_DEVICE_STOPPED;
349 mutex_unlock(&priv->slaves_mtx);
351 list_for_each_entry_safe(sdata, next, &priv->slaves, list) {
352 mutex_lock(&sdata->hw->slaves_mtx);
353 list_del(&sdata->list);
354 mutex_unlock(&sdata->hw->slaves_mtx);
356 unregister_netdevice(sdata->dev);
361 wpan_phy_unregister(priv->phy);
363 EXPORT_SYMBOL(ieee802154_unregister_device);
365 MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
366 MODULE_LICENSE("GPL v2");